An air conditioner and a control method, device and readable storage medium thereof

Abstract

The application provides an air conditioner, a control method and device thereof and a readable storage medium. The air conditioner comprises a water pump for discharging condensate water generated by an indoor unit. The control method comprises: obtaining a first water pump current change rate f n of the water pump in a first time period; controlling a water pump rotating speed of the water pump in a second time period according to the first water pump current change rate f n ; and wherein the first time period and the second time period are adjacent time periods, and the second time period is after the first time period. The application solves the problem that the technical solution in the related art cannot effectively reduce the water pump noise.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and in particular, relates to an air conditioner and a control method, device and readable storage medium thereof. BACKGROUND

[0002] Due to the special installation scene, the multi-connected indoor unit often needs to be equipped with a water pump. The water pump is used to discharge the condensate water generated by the indoor unit. In a home environment, the requirement for noise is relatively high. The operating body noise of an alternating current water pump is high, and the speed is not adjustable, which is easy to cause complaints. However, the operating noise of a direct current water pump is low, and it is gradually promoted. In the prior art, when the condensate water in the water pan of the indoor unit reaches a certain water level, the water pump will start to work to discharge the condensate water at a fixed speed. When the indoor humidity changes, the water level in the water pan of the indoor unit will also change. When the water level is low, the water pump operation will suck in air to generate noise. How to reasonably control the output of the water pump to meet the noise requirements of users is a problem that needs to be solved by air conditioner manufacturers.

[0003] It can be seen that the problem in the related art is that the technical solution in the related art cannot effectively reduce the noise of the water pump. SUMMARY

[0004] The problem solved by the present application is that the technical solution in the related art cannot effectively reduce the noise of the water pump.

[0005] To solve the above problems, the first object of the present application is to provide a control method of an air conditioner.

[0006] The second object of the present application is to provide a control device of an air conditioner.

[0007] The third object of the present application is to provide an air conditioner.

[0008] The fourth object of the present application is to provide a readable storage medium.

[0009] To achieve the first object of the present application, the embodiments of the present application provide a control method of an air conditioner, the air conditioner comprising a water pump, the water pump being used to discharge condensate water generated by an indoor unit, the control method comprising:

[0010] S100: acquiring a first water pump current change rate f of the water pump in a first time period; n ;

[0011] S200: controlling a water pump speed of the water pump in a second time period according to the first water pump current change rate f n ;

[0012] The first time period and the second time period are adjacent time periods, and the second time period is located after the first time period; S100 comprises:

[0013] acquiring a first water pump current of the water pump at the beginning of the first time period and a second water pump current of the water pump at the end of the first time period;

[0014] subtracting the first water pump current from the second water pump current to determine a difference value;

[0015] dividing the difference value by the first time period to determine a first water pump current change rate f n .

[0016] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: according to the water pump current change rate of the previous period, the water pump speed of the next period is controlled, so that the water pump speed is maintained within a reasonable range, the output of the water pump is reasonably controlled, the situation that the water overflows or the condensate water is too little to produce noise is effectively avoided, and the reliability of the control method of the application is effectively improved, and the energy consumption is reduced.

[0017] In an embodiment of the application, S200 comprises:

[0018] acquiring a historical water pump current change rate f n-1 of a previous time period of the first time period and a water pump speed V n of the first time period;

[0019] when f n ≤0, the speed of the water pump in the second time period is maintained as V n ;

[0020] when f n >0 and f n <f n-1 , the speed of the water pump in the second time period is controlled as V n +A f n ;

[0021] when f n >0 and f n ≥f n-1 , the speed of the water pump in the second time period is controlled as V n +A f n +B(f n -f n-1 );

[0022] wherein A and B are both preset coefficients.

[0023] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: in the embodiment, the water level condition is determined by detecting the change of the water pump operating current, and the speed output of the direct-current water pump is adjusted, so that the energy consumption is reduced and the water pump noise is reduced, and the reliability of the control method of the application is effectively improved.

[0024] In one embodiment of the present application, before S100, the control method further comprises:

[0025] After the air conditioner enters the refrigeration mode, the water pump runs at the minimum rotation speed V min After running for the first time threshold, the initial water pump current change rate f1 of the water pump in the initial time period is obtained;

[0026] According to the initial water pump current change rate f1, the rotation speed of the water pump in the next time period is controlled.

[0027] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: in the scheme of the present embodiment, the emptying of the air conditioner at the beginning of refrigeration operation is considered, the air conditioner is allowed to run for a period of time first, and then the control method of the present application is executed after the air conditioner enters the normal operation state, thereby effectively improving the reliability of the control method of the present application.

[0028] In one embodiment of the present application, according to the initial water pump current change rate f1, the rotation speed of the water pump in the next time period is controlled, which comprises:

[0029] When f1≤0, the rotation speed of the water pump in the next time period is maintained at V min ;

[0030] When f1>0, the rotation speed of the water pump in the next time period is controlled to be V min +A f1.

[0031] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the rotation speed of the water pump in the initial operation stage of the air conditioner can be accurately controlled, and the stability of the control method of the present application is effectively improved.

[0032] In one embodiment of the present application, the control method further comprises:

[0033] When the rotation speed of the water pump is the maximum rotation speed V max , the water pump current change rate is greater than 0, and the duration reaches the second time threshold, after the float switch is turned off, the full water fault alarm prompt is output.

[0034] Compared with the prior art, the technical effects achieved by adopting the technical scheme are: the scheme of the present embodiment can effectively prevent the overflow of the condensate water in the water pan, thereby effectively improving the reliability of the control method of the present application.

[0035] In one embodiment of the present application, the control method further comprises:

[0036] When the rotation speed of the water pump is less than V minC, and the water pump current rate of change is greater than 0, outputting a water pump fault alarm prompt;

[0037] C is a preset coefficient.

[0038] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the scheme of the embodiment can effectively and timely warn the abnormal condition of the water pump, and further improve the reliability of the control method of the application.

[0039] In an embodiment of the application, the control method further comprises:

[0040] When the air conditioner is turned off, the water pump is controlled to run at V min for a third time threshold.

[0041] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: in the embodiment, after the air conditioner is turned off, the water pump is controlled to run at V min for a third time threshold, which can avoid that the water pump runs at too high a speed and produces noise when the air conditioner is turned off.

[0042] To achieve the second object of the application, an embodiment of the application provides a control device of an air conditioner, the air conditioner comprising a water pump for discharging condensate water generated by an indoor unit, and the control device comprising: a detection module for acquiring a first water pump current rate of change f n of the water pump in a first time period; and a control module for controlling a water pump speed of the water pump in a second time period according to the first water pump current rate of change f n ; wherein the first time period and the second time period are adjacent time periods, and the second time period is located after the first time period.

[0043] The control device of the air conditioner of the embodiment of the application implements the steps of the control method of the air conditioner of any embodiment of the application, and thus has all the beneficial effects of the control method of the air conditioner of any embodiment of the application, which will not be described herein again.

[0044] To achieve the third object of the application, an embodiment of the application provides an air conditioner, which comprises a processor, a memory, and a program or instructions stored on the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the control method of the air conditioner of any embodiment of the application.

[0045] The air conditioner of the embodiment of the application implements the steps of the control method of the air conditioner of any embodiment of the application, and thus has all the beneficial effects of the control method of the air conditioner of any embodiment of the application, which will not be described herein again.

[0046] To achieve the fourth object of the present application, the embodiment of the present application provides a readable storage medium, and the readable storage medium stores programs or instructions, and the programs or instructions are executed by a processor to realize the steps of the control method of the air conditioner according to any one of the embodiments of the present application.

[0047] The readable storage medium of the embodiment of the present application realizes the steps of the control method of the air conditioner according to any one of the embodiments of the present application, and thus has all the beneficial effects of the control method of the air conditioner according to any one of the embodiments of the present application, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0048] Figure 1 The flowchart of the steps of the control method of the air conditioner according to some embodiments of the present application. DETAILED DESCRIPTION

[0049] To make the above objects, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are described in detail below with reference to the drawings.

[0050] Referring to Figure 1 , the embodiment provides a control method of an air conditioner, the air conditioner comprising a water pump, the water pump being used to discharge condensate water generated by an indoor unit, and the control method comprising:

[0051] S100: acquiring a first water pump current change rate f n of the water pump in a first time period;

[0052] S200: controlling a water pump rotating speed of the water pump in a second time period according to the first water pump current change rate f n ;

[0053] The first time period and the second time period are adjacent time periods, and the second time period is after the first time period; S100 comprises:

[0054] acquiring a first water pump current of the water pump at the beginning of the first time period and a second water pump current of the water pump at the end of the first time period;

[0055] subtracting the first water pump current from the second water pump current to determine a difference value;

[0056] dividing the difference value by the first time period to determine the first water pump current change rate f n .

[0057] In the embodiment, the air conditioner comprises a water pump for discharging the condensate water generated by the indoor unit; when the air conditioner is working, the indoor unit will generate condensate water, which is stored in the water pan of the indoor unit and needs to be pumped out by the water pump. In the prior art, the rotating speed of the water pump is constant when the water pump is working. When the indoor humidity changes, the water level in the water pan changes, which may cause the risk of excessive condensate water or insufficient condensate water, and the water pump will suck air and generate noise when working. Therefore, how to reasonably control the output of the water pump to meet the noise demand of the user is a problem that needs to be solved by the air conditioner manufacturer.

[0058] It should be noted that in the embodiment, the air conditioner periodically acquires the water pump current change rate and periodically controls the water pump rotating speed according to the water pump current change rate. For example, at the end of the first time period, the water pump current change rate in the first time period is acquired, the water pump rotating speed in the second time period is determined according to the water pump current change rate, and the rotating speed of the water pump in the second time period is adjusted accordingly.

[0059] Further, in S100, a first water pump current change rate f n In the prior art, in order to save costs, no sensor is arranged in the water pan to detect the water level, so the prior art cannot directly detect and acquire the water level. In the embodiment, the operating power of the water pump for discharging water is related to the water level of the condensate water in the water pan. The higher the water level, the greater the operating power of discharging water, and the water pump current increases. If the water level decreases, the operating power of discharging water also decreases, and the water pump current decreases. Therefore, the change of the water level can be determined by the water pump current change rate. When the water pump current change rate is positive, it indicates that the water level is rising. When the water pump current change rate is negative, it indicates that the water level is falling.

[0060] Further, in S200, the water pump rotating speed of the water pump in the second time period is controlled according to the first water pump current change rate f n The first time period and the second time period are adjacent time periods, and the second time period is after the first time period. According to the first water pump current change rate f n , the change of the water level in the first time period can be acquired, and the water pump rotating speed of the second time period can be accurately controlled.

[0061] It can be understood that, by the scheme of the embodiment, the water pump rotating speed of the next period is controlled according to the water pump current change rate of the last period, which can maintain the water pump rotating speed in a reasonable range. By reasonably controlling the output of the water pump, the situation of water overflow or noise caused by insufficient condensate water can be effectively avoided, and the reliability of the control method of the application is effectively improved, and the energy consumption is reduced.

[0062] Further, in one specific embodiment, S200, comprising:

[0063] obtaining a historical water pump current rate of change f n-1 and a water pump rotation speed V n in a previous time period of the first time period;

[0064] when f n ≤ 0, maintaining the rotation speed of the water pump in the second time period as V n ;

[0065] when f n > 0 and f n < f n-1 , controlling the rotation speed of the water pump in the second time period as V n + A f n ;

[0066] when f n > 0 and f n ≥ f n-1 , controlling the rotation speed of the water pump in the second time period as V n + A f n + B (f n - f n-1 );

[0067] wherein A and B are both preset coefficients.

[0068] In the present embodiment, at the end of the first time period, a historical water pump current rate of change f n-1 and a water pump rotation speed V n in a previous time period of the first time period are obtained; when f n ≤ 0, it indicates that the water pump rotation speed can meet the water level drainage requirement at this time, and the rotation speed of the water pump in the second time period can be maintained as V n unchanged; when f n > 0 and f n < f n-1 , it indicates that the water pump current rate of change is gradually decreasing, the water level rise is slowing down, and the water pump drainage is insufficient, and the rotation speed of the water pump needs to be increased, so the rotation speed of the water pump in the second time period is controlled as V n + A f n ; when f n > 0 and f n ≥ f n-1 , it indicates that the water pump drainage is insufficient, and the water level rises fast, and the rotation speed of the water pump needs to be increased, so the rotation speed of the water pump in the second time period is controlled as V n + A f n + B (f n - f n-1).

[0069] It should be noted that A and B are obtained by fitting the curve of water level and current change simulated by experiment, and are related to the design parameters and lift of the water pump of the manufacturer. The working current is different for different lifts, and there are also differences for different water pumps.

[0070] Understandably, in the embodiment, the water level condition is determined by detecting the change of the water pump operating current, and the speed output of the direct current water pump is adjusted, so that the energy consumption is reduced and the water pump noise is also reduced, and the reliability of the control method of the application is effectively improved.

[0071] Further, in a specific embodiment, before S100, the control method further comprises:

[0072] After the air conditioner enters the refrigeration mode, the water pump runs at the minimum speed V min After running for the first time threshold, the initial water pump current change rate f1 of the water pump in the initial time period is obtained;

[0073] According to the initial water pump current change rate f1, the water pump speed in the next time period is controlled.

[0074] It should be noted that the first time period is after the initial time period.

[0075] Optionally, the first time threshold is between 3-5; preferably, the first time threshold is 3 minutes.

[0076] In this embodiment, when the air conditioning system is started to refrigerate, the water pump first runs at the minimum speed for the first time threshold, then periodically detects the change of the water pump current, and controls the water pump speed according to the water pump current change rate.

[0077] Understandably, in the scheme of the embodiment, the emptying of the air conditioner at the beginning of refrigeration is considered, the air conditioner is first run for a period of time, and then the control method of the application is executed after the air conditioner enters the normal operating state, thereby effectively improving the reliability of the control method of the application.

[0078] Further, in a specific embodiment, according to the initial water pump current change rate f1, the water pump speed in the next time period is controlled, which comprises:

[0079] When f1≤0, the speed of the water pump in the next time period is maintained at V min ;

[0080] When f1>0, the speed of the water pump in the next time period is controlled to be V min +A f1.

[0081] In this embodiment, when f1≤0, it indicates that the minimum rotational speed can meet the water level drainage requirements, and the water pump maintains V. min The pump is running, and its speed in the next time cycle is V. min When f1 > 0, it indicates that the water level is rising. Therefore, the pump speed is initially adjusted based on the initial pump current change rate f1, controlling the pump speed to V in the next time period. min +Af1.

[0082] Understandably, the solution in this embodiment enables accurate control of the water pump speed during the initial operation phase of the air conditioner, effectively improving the stability of the control method of the present invention.

[0083] Furthermore, in one specific embodiment, the control method includes:

[0084] After the air conditioner enters cooling mode, the water pump operates at its lowest speed V. min After running the first time threshold, obtain the initial pump current change rate f1 within the initial time period;

[0085] Based on the initial pump current change rate f1, control the pump speed during the first time period, including: when f1≤0, maintain the pump speed at V during the first time period. min When f1 > 0, the speed of the water pump in the first time period is controlled to be V. min +A f1;

[0086] Obtain the rate of change f of the first pump current during the first time period. n ;

[0087] According to the rate of change of the first water pump current f n Controlling the pump speed during the second time period includes: obtaining the historical pump current change rate f during the previous time period of the first time period. n-1 and the pump speed V during the first time period n When f n When ≤0, maintain the pump speed at V during the second time period. n When f n >0, and f n <f n-1 At that time, the speed of the water pump during the second time period is controlled to be V. n +Af n When f n >0, and f n ≥f n-1 At that time, the speed of the water pump during the second time period is controlled to be V. n +Af n +B(f n -fn-1

[0088] Wherein, A and B are both preset coefficients, f n-1 = f1; when f1≤0, V n = V min ; when f1>0, V n = V min + Af1; the initial time period, the first time period and the second time period are adjacent time periods, and the second time period is located after the first time period, and the first time period is located after the initial time period.

[0089] Understandably, in the scheme of the embodiment, the water pump speed of the next period is controlled according to the water pump current rate of change of the last period, so that the water pump speed can be maintained within a reasonable range, and by reasonably controlling the output of the water pump, the situation of water overflow or noise caused by too little condensed water can be effectively avoided, thereby effectively improving the reliability of the control method and reducing energy loss.

[0090] Further, in a specific embodiment, the control method further comprises:

[0091] When the water pump speed is the highest speed V max , the water pump current rate of change is greater than 0, and the duration reaches the second time threshold, after the float switch is turned off, a water full fault alarm prompt is output.

[0092] In the embodiment, when the water pump current rate of change is greater than 0, it indicates that the drainage capacity is insufficient at this time, and the water pump speed needs to be increased, and the water pump speed is the highest speed V max , it indicates that the highest speed of the water pump cannot meet the drainage demand, and after the duration reaches the second time threshold, the condensed water in the water pan has the risk of overflowing, so after the float switch is turned off, a water full fault alarm prompt is output to remind the user to check the water pan.

[0093] Understandably, the scheme of the embodiment can effectively prevent the situation of condensed water overflowing in the water pan, thereby effectively improving the reliability of the control method.

[0094] Further, in a specific embodiment, the control method further comprises:

[0095] When the water pump speed is less than V min -C, and the water pump current rate of change is greater than 0, a water pump fault alarm prompt is output;

[0096] Wherein, C is a preset coefficient.

[0097] In the embodiment, the water pump speed has a normal operating range, and when the water pump speed is less than V min ​C, it indicates that the water pump speed is lower than the safe running speed of the water pump at this time, and the water pump current rate of change is greater than 0, which indicates that the water pump has an abnormality at this time, and the water pump fault alarm prompt is output at this time.

[0098] It should be noted that the value of C is determined according to the pre-warning speed provided by the water pump manufacturer.

[0099] Understandably, the scheme of the embodiment can effectively and timely warn the abnormal situation of the water pump, and further improve the reliability of the control method of the application.

[0100] Further, in a specific embodiment, the control method further comprises:

[0101] When the air conditioner is turned off, the water pump is controlled to run at V min for a third time threshold.

[0102] Optionally, the third time threshold is 3-5; preferably, the third time threshold is 3 minutes.

[0103] Understandably, in the embodiment, after the air conditioner is turned off, the water pump is controlled to run at V min for a third time threshold, which can avoid the water pump running speed being too high when the air conditioner is turned off, and generating noise.

[0104] Further, the embodiment provides a control device of an air conditioner, the air conditioner comprising a water pump, the water pump being used to drain the condensate water generated by the indoor unit, the control device comprising: a detection module, the detection module being used to acquire a first water pump current rate of change f n of the water pump in a first time period; and a control module, the control module being used to control the water pump speed of the water pump in a second time period according to the first water pump current rate of change f n ; wherein the first time period and the second time period are adjacent time periods, and the second time period is located after the first time period.

[0105] The control device of the air conditioner of the embodiment of the application implements the steps of the control method of the air conditioner of any embodiment of the application, and thus has all the beneficial effects of the control method of the air conditioner of any embodiment of the application, which will not be described here.

[0106] Further, the embodiment provides an air conditioner, which comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the control method of the air conditioner of any embodiment of the application.

[0107] The air conditioner of the embodiment of the present application realizes the steps of the control method of the air conditioner of any embodiment of the present application, thus having all the beneficial effects of the control method of the air conditioner of any embodiment of the present application, which will not be repeated here.

[0108] Further, the embodiment provides a readable storage medium, and the readable storage medium stores programs or instructions, and the programs or instructions are executed by a processor to realize the steps of the control method of the air conditioner of any embodiment of the present application.

[0109] The readable storage medium of the embodiment of the present application realizes the steps of the control method of the air conditioner of any embodiment of the present application, thus having all the beneficial effects of the control method of the air conditioner of any embodiment of the present application, which will not be repeated here.

[0110] Although the present application is disclosed as above, the present application is not limited to this. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, thus the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A control method of an air conditioner, characterized in that, the air conditioner comprises a water pump for discharging condensate water generated by an indoor unit, and the control method comprises: S100: obtaining a first water pump current change rate fn of the water pump in a first time period; S200: controlling a water pump rotating speed of the water pump in a second time period according to the first water pump current change rate fn; wherein the first time period and the second time period are adjacent time periods, and the second time period is after the first time period; the S100 comprises: obtaining a first water pump current at the beginning of the first time period and a second water pump current at the end of the first time period; determining a difference value by subtracting the first water pump current from the second water pump current; determining the first water pump current change rate fn by dividing the difference value by the first time period; before the S100, the control method further comprises: after the air conditioner enters a cooling mode, obtaining an initial water pump current change rate f1 of the water pump in an initial time period after the water pump runs at a minimum rotating speed Vmin for a first time threshold; controlling a water pump rotating speed of the water pump in a next time period according to the initial water pump current change rate f1; the S200 comprises: obtaining a historical water pump current change rate fn-1 in a time period before the first time period and a water pump rotating speed Vn in the first time period; when fn≤0, maintaining the rotating speed of the water pump in the second time period as Vn; when fn>0 and fn<fn-1, controlling the rotating speed of the water pump in the second time period as Vn+Afn; when fn>0 and fn≥fn-1, controlling the rotating speed of the water pump in the second time period as Vn+Afn+B(fn-fn-1); wherein A and B are both preset coefficients; the controlling a water pump rotating speed of the water pump in a next time period according to the initial water pump current change rate f1 comprises: when f1≤0, maintaining the rotating speed of the water pump in the next time period as Vmin; when f1>0, controlling the rotating speed of the water pump in the next time period as Vmin+Af1.

2. The control method of claim 1, characterized in that, the control method further comprises: when the water pump rotating speed is a maximum rotating speed Vmax, the water pump current change rate is greater than 0, and the duration reaches a second time threshold, outputting a water full fault alarm prompt after a floating water switch is turned off.

3. The control method of claim 1, characterized in that, the control method further comprises: when the water pump rotating speed is less than Vmin-C and the water pump current change rate is greater than 0, outputting a water pump fault alarm prompt; wherein C is a preset coefficient.

4. The control method of claim 1, characterized in that, the control method further comprises: after the air conditioner is turned off, controlling the water pump to run at Vmin for a third time threshold.

5. A control device for an air conditioner, characterized by comprising: The control method of any one of claims 1 to 4 can be implemented, The air conditioner comprises a water pump for discharging condensate water generated by an indoor unit, and the control device comprises: a detection module for obtaining a first water pump current change rate fn of the water pump in a first time period; a control module for controlling a water pump rotating speed of the water pump in a second time period according to the first water pump current change rate fn; wherein the first time period and the second time period are adjacent time periods, and the second time period is located after the first time period.

6. An air conditioner, characterized in that, the air conditioner comprises a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions are executed by the processor to implement the steps of the control method according to any one of claims 1 to 4.

7. A readable storage medium, characterized in that, the readable storage medium stores a program or instructions, and the program or instructions are executed by a processor to implement the steps of the control method according to any one of claims 1 to 4.

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