Air conditioner, control method and device for draining pump of air conditioner and storage medium

Abstract

The invention discloses an air conditioner, a control method and device for a draining pump of the air conditioner and a storage medium. The control method comprises the steps that the drainage pump is controlled to operate at an initial first rotating speed, and first operating power corresponding to the first rotating speed is obtained; the first operation power and second operation power are compared, the second operation power is determined based on a first fitting relation and the first rotating speed, and the first fitting relation represents the corresponding relation between the rotating speed and the operation power of the drainage pump in the zero flow state; if the first operation power is matched with the second operation power, the first rotating speed is increased until the first operation power corresponding to the increased first rotating speed is not matched with the second operation power, and the target lift is determined based on the current first rotating speed and / or the current second operation power; determining a target rotating speed of the draining pump based on the target lift, and controlling the draining pump to operate at the target rotating speed. The target lift needed by current drainage can be automatically recognized, then the running rotating speed of the drainage pump is automatically adjusted, and drainage noise is effectively reduced.

Description

Technical Field

[0001] The present application relates to the field of air conditioning, and in particular to a control method, device and storage medium for an air conditioner and a drainage pump thereof. Background Art

[0002] When the air conditioner is turned on in cooling or dehumidification mode, it absorbs moisture in the air and converts it into condensed water. For example, when the indoor unit of the air conditioner is running in cooling or dehumidification mode, the moisture in the air will condense and drip into the water collection pan under the heat exchanger.

[0003] If the condensed water collected in the water receiving pan is directly drained through the drain pipe, the slope of the water receiving pipe needs to be ensured, which requires sacrificing the height of the suspended ceiling and affecting the indoor floor height. In the related art, in order to reduce the height of the suspended ceiling and reduce the impact on the indoor floor height, the water in the water receiving pan will be lifted and discharged through the drain pipe, so a drainage pump is required to lift the water in the water receiving pan.

[0004] However, in the related art, the speed of the drain pump of the drainage system of the air conditioner is set to remain unchanged to meet the design requirements of the rated flow and rated head. For example, the rated flow is 450 ml per second and the rated head is 1.2 meters. That is, no matter how high the drain pipe installed by the user is, after the air conditioner is started, the drain pump will run at the set speed, resulting in high drainage noise, affecting the user experience. Summary of the invention

[0005] In view of this, an embodiment of the present application provides a control method, device and storage medium for an air conditioner and a drainage pump thereof, aiming to effectively reduce the operating noise of the drainage pump.

[0006] The technical solution of the embodiment of the present application is implemented as follows:

[0007] In a first aspect, an embodiment of the present application provides a method for controlling a drain pump of an air conditioner, comprising:

[0008] Controlling the drainage pump to operate at an initial first speed, and obtaining a first operating power corresponding to the first speed;

[0009] Compare the first operating power with the second operating power, the second operating power is determined based on a first fitting relationship and the first speed, the first fitting relationship represents the corresponding relationship between the speed and the operating power of the drainage pump in a zero flow state, the zero flow state being that the current head of the drainage pump is less than the drainage height; if the first operating power matches the second operating power, increase the first speed until the first operating power corresponding to the increased first speed does not match the second operating power, and determine the target head based on the current first speed and / or the current second operating power;

[0010] A target speed of the drainage pump is determined based on the target lift, and the drainage pump is controlled to operate at the target speed.

[0011] In some embodiments, before comparing the first operating power with the second operating power, the method further includes:

[0012] The first operating power is compared with a no-load rated power representing no-load operation of the drainage pump, and if it is determined that the difference between the first operating power and the no-load rated power is greater than or equal to a first set threshold, the comparison between the first operating power and the second operating power is performed.

[0013] In some embodiments, comparing the first operating power to the second operating power includes:

[0014] If the absolute value of the difference between the first operating power and the second operating power is less than a second set threshold, it is determined that the first operating power matches the second operating power;

[0015] If the absolute value of the difference between the first operating power and the second operating power is greater than or equal to a second set threshold, it is determined that the first operating power does not match the second operating power.

[0016] In some embodiments, increasing the first rotation speed includes:

[0017] increasing the first speed based on a set speed step;

[0018] The set speed step is related to the determination accuracy of the target lift.

[0019] In some embodiments, determining the target lift based on the current first speed and / or the current second operating power includes:

[0020] Determine the target lift based on the current first speed and the second fitting relationship; or,

[0021] determining the target lift based on the current second operating power and the third fitting relationship; or,

[0022] Determine a first lift based on the current first speed and the second fitting relationship; determine a second lift based on the current second operating power and a third fitting relationship; determine the target lift based on the first lift and the second lift;

[0023] The second fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump in a zero flow state, and the third fitting relationship represents the corresponding relationship between the operating power and the lift of the drainage pump in a zero flow state.

[0024] In some embodiments, determining the target speed of the drainage pump based on the target lift includes:

[0025] Determining a target speed of the drainage pump based on the target lift and a fourth fitting relationship;

[0026] The fourth fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump at the rated flow rate.

[0027] In some embodiments, controlling the drainage pump to operate at an initial first speed includes:

[0028] The drainage pump is controlled to run at a speed corresponding to the rated minimum lift.

[0029] In a second aspect, an embodiment of the present application provides a control device for a drainage pump of an air conditioner, comprising:

[0030] A head determination module is used to control the drainage pump to operate at an initial first speed and obtain a first operating power corresponding to the first speed; compare the first operating power with a second operating power, the second operating power is determined based on a first fitting relationship and the first speed, the first fitting relationship represents the corresponding relationship between the speed and the operating power of the drainage pump in a zero flow state, the zero flow state being that the current head of the drainage pump is less than the drainage height; if the first operating power matches the second operating power, increase the first speed until the first operating power corresponding to the increased first speed does not match the second operating power, and determine a target head based on the current first speed and / or the current second operating power;

[0031] The drainage control module is used to determine a target speed of the drainage pump based on the target lift, and control the drainage pump to operate at the target speed.

[0032] In a third aspect, an embodiment of the present application provides an air conditioner, including a drainage pump, and the air conditioner further includes: a processor and a memory for storing a computer program that can be run on the processor, wherein:

[0033] The processor is used to execute the steps of the method described in the first aspect of the embodiment of the present application when running a computer program.

[0034] In a fourth aspect, an embodiment of the present application provides a storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the method described in the first aspect of the embodiment of the present application are implemented.

[0035] The technical solution provided by the embodiment of the present application controls the drainage pump to run at an initial first speed, and obtains the first operating power corresponding to the first speed; compares the first operating power with the second operating power, the second operating power is determined based on the first fitting relationship and the first speed, the first fitting relationship represents the corresponding relationship between the speed and the operating power of the drainage pump in the zero flow state, and the zero flow state is that the current head of the drainage pump is less than the drainage height; if the first operating power matches the second operating power, then the first speed is increased until the first operating power corresponding to the increased first speed does not match the second operating power, and the target head is determined based on the current first speed and / or the current second operating power; the target speed of the drainage pump is determined based on the target head, and the drainage pump is controlled to run at the target speed. Since the method of the embodiment of the present application can automatically identify the target head required for the current drainage, the speed of the drainage pump can be automatically adjusted based on different drainage scenarios. For example, when the ceiling height corresponding to the indoor unit is low and the drainage height is reduced, the operating speed of the drainage pump can be effectively reduced, thereby reducing the operating noise of the drainage pump and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 A flow chart of a method for controlling a drain pump of an air conditioner according to an embodiment of the present application;

[0037] Figure 2 A schematic diagram of a fitting curve of a first fitting relationship in an application example of the present application;

[0038] Figure 3 A schematic diagram of a fitting curve of a second fitting relationship in an application example of the present application;

[0039] Figure 4 A schematic diagram of a fitting curve of a third fitting relationship in an application example of the present application;

[0040] Figure 5 A flow chart of a method for controlling a drain pump of an air conditioner in an application example of the present application;

[0041] Figure 6 This is a schematic diagram of the structure of a control device for a drain pump of an air conditioner according to an embodiment of the present application;

[0042] Figure 7 This is a schematic diagram of the structure of the air conditioner according to the embodiment of the present application. DETAILED DESCRIPTION

[0043] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0045] The embodiment of the present application provides a control method for an air conditioner, which is used to adjust the temperature, humidity, etc. of the environment. The air conditioner can be a cooling-only air conditioner or a cooling-heating dual-purpose air conditioner. Exemplarily, the air conditioner can be a ceiling-mounted air conditioner, which includes a drainage pump and a water receiving pan. When the indoor unit of the air conditioner is operated in a cooling or dehumidification mode, moisture in the air will condense and drip into the water receiving pan below the heat exchanger. The drainage pump is used to lift the water in the water receiving pan and discharge it through a drainage pipe.

[0046] In the related art, the speed of the drain pump of the drainage system of the air conditioner is set to be constant to meet the design requirements of the rated flow and rated head. For example, the rated flow is 450 ml per second and the rated head is 1.2 meters. That is, no matter how high the drain pipe installed by the user is, after the air conditioner is started, the drain pump runs at the set speed. In actual application, when the user's ceiling height is low, the drainage height is correspondingly low. However, the drain pump still runs at the aforementioned relatively high set speed, resulting in high drainage noise, affecting the user experience.

[0047] Based on this, the embodiment of the present application provides a control scheme that can automatically identify the drainage height, and then control the operating speed of the drainage pump based on the identified drainage height, which can effectively reduce the drainage noise and thus improve the user experience.

[0048] The present application embodiment provides a method for controlling a drain pump of an air conditioner, which can be applied to a processor of the air conditioner, for example, a main control board of the air conditioner, such as Figure 1 As shown, the control method includes:

[0049] Step 101: Control the drainage pump to operate at an initial first speed, and obtain a first operating power corresponding to the first speed.

[0050] Exemplarily, the drainage pump of the embodiment of the present application has a control port for a PWM (Pulse Width Modulation) signal, and the rotation speed change of the drainage pump can be controlled based on the adjustment of the duty cycle of the PWM signal output by the processor.

[0051] Exemplarily, the drain pump can be a drain pump driven by a DC motor, which has an FG feedback line for feeding back the winding current frequency f. The processor can determine the current speed of the drain pump based on the current frequency f fed back by the FG feedback line, and then based on feedback control, adjust the drain pump to run at a set speed, for example, at an initial first speed.

[0052] Exemplarily, the processor may determine the current speed of the drainage pump based on the current frequency f using the following formula:

[0053] n=60f / p

[0054] Among them, n is the speed of the drainage pump, f is the current frequency, and p is the number of magnetic poles of the motor.

[0055] Exemplarily, controlling the drainage pump to operate at an initial first speed includes:

[0056] The drainage pump is controlled to run at a speed corresponding to the rated minimum lift.

[0057] For example, the rated minimum head is 0.1 meter, and the drainage pump is controlled to run at a speed corresponding to the rated minimum head. Since the rated minimum head is generally lower than the actual drainage height, the drainage pump will be in a zero flow state at this time. The first operating power obtained should be the operating power corresponding to the first speed of the drainage pump in the zero flow state.

[0058] For example, the working current of the motor of the drain pump may be sampled, and the real-time working power of the drain pump may be determined based on the sampled working current. Thus, the corresponding operating power of the drain pump at different rotation speeds may be obtained.

[0059] Step 102, compare the first operating power with the second operating power, the second operating power is determined based on a first fitting relationship and the first speed, the first fitting relationship represents a mapping relationship between the speed and the operating power of the drainage pump in a zero flow state, the zero flow state is that the current head of the drainage pump is less than the drainage height; if the first operating power matches the second operating power, increase the first speed until the first operating power and the second operating power corresponding to the increased first speed do not match, and determine the target head based on the current first speed and / or the current second operating power.

[0060] Here, the corresponding first fitting relationship may be determined for the same model of drainage pump based on simulation tests.

[0061] It should be noted that the head, flow rate, operating power and speed of the drainage pump are important parameters that determine the working performance of the drainage pump. Among them, the head refers to the height to which the drainage pump can lift water, which can be represented by H; the flow rate refers to the water delivery flow of the drainage pump per unit time (also known as the drainage flow rate), which can be represented by Q; the operating power refers to the work done by the motor of the drainage pump, which can be represented by P; the speed refers to the rotation speed of the motor of the drainage pump, which can be represented by n.

[0062] According to the working characteristics of the drainage pump, under the zero flow state, that is, the current head of the drainage pump is less than the drainage height, so that the drainage flow of the drainage pump is zero, there is a specific fitting relationship between the rotation speed and the operating power of the drainage pump. In this way, based on the simulation test, a first fitting relationship representing the corresponding relationship between the rotation speed and the operating power of the drainage pump under the zero flow state can be obtained.

[0063] Exemplarily, the processor of the air conditioner can pre-store the first fitting relationship of the drainage pump and obtain the first fitting relationship by accessing the local memory, or can obtain the first fitting relationship corresponding to the model of the drainage pump by accessing the server. The embodiment of the present application is not limited to this.

[0064] In an application example, the first fitting relationship of a certain model of drainage pump is as follows Figure 2 As shown, under the zero flow state, the operating power corresponding to multiple speeds is collected and curve fitting is performed. The first fitting relationship obtained can be expressed as: P = 5E-07n 2 -0.0004n+0.096, where 5E-07 is 5*10 -7 In scientific notation, the speed n is expressed in revolutions per minute (rpm) and the operating power P is expressed in watts (W).

[0065] It can be understood that under the zero flow state, the speed of the drainage pump is positively correlated with the operating power, that is, the operating power increases with the increase of the speed; in addition, under the zero flow state, as the speed and operating power of the drainage pump increase, its head will also increase. Therefore, by adjusting the speed of the drainage pump, the speed of the drainage pump gradually increases. When the corresponding current head is higher than the actual drainage height, since the drainage pump is no longer in the zero flow state, the relationship between the current speed and the current operating power will deviate from the aforementioned first fitting relationship. Based on this, the actual drainage height of the applied drainage pump can be intelligently identified.

[0066] In practical applications, if the water tray is in a water shortage state, it will affect the identification of the drainage height of the drain pipe. Based on this, in order to effectively reduce the misjudgment of the drainage height of the drain pipe, in some embodiments, before comparing the first operating power with the second operating power, the method further includes:

[0067] The first operating power is compared with a no-load rated power representing no-load operation of the drainage pump, and if it is determined that the difference between the first operating power and the no-load rated power is greater than or equal to a first set threshold, the comparison between the first operating power and the second operating power is performed.

[0068] Here, the no-load rated power can be determined based on test data. If the difference between the obtained first operating power and the no-load rated power is less than a first set threshold, the drain pump is determined to be in a no-load operating state, and the above-mentioned comparison is repeated until it is determined that the drain pump is operating in a water-carrying state, that is, the difference between the first operating power and the no-load rated power is greater than or equal to the first set threshold, and then the step of comparing the first operating power with the second operating power is performed, thereby intelligently identifying the drainage height of the drain pipe.

[0069] Here, the first set threshold can be reasonably determined based on test data, and can be understood as a threshold for judging whether the drainage pump is in a no-load operation state based on the difference between the obtained first operating power and the no-load rated power when the drainage pump is controlled to operate at the initial first speed.

[0070] Exemplarily, comparing the first operating power with the second operating power includes:

[0071] If the absolute value of the difference between the first operating power and the second operating power is less than a second set threshold, it is determined that the first operating power matches the second operating power;

[0072] If the absolute value of the difference between the first operating power and the second operating power is greater than or equal to a second set threshold, it is determined that the first operating power does not match the second operating power.

[0073] It can be understood that, for each first operating power, the corresponding second operating power can be determined based on the corresponding first speed and the first fitting relationship, and the two can be compared. If the absolute value of the difference between the two is less than the second set threshold, it is determined that the two meet the aforementioned first fitting relationship, that is, it is determined that the first operating power matches the second operating power. At this time, the drainage pump is still in a zero flow state; if the absolute value of the difference between the two is greater than or equal to the second set threshold, it is determined that the two do not meet the aforementioned first fitting relationship, that is, it is determined that the first operating power does not match the second operating power. At this time, the current head of the drainage pump is greater than the actual drainage height, and the drainage pump can lift the water in the water tray and discharge it through the drain pipe. The current head of the drainage pump can be used as the target head.

[0074] Exemplarily, increasing the first rotation speed includes:

[0075] increasing the first speed based on a set speed step;

[0076] The set speed step is related to the determination accuracy of the target lift.

[0077] It is understandable that the smaller the speed step is, the closer the target head is to the actual drainage height, that is, the smaller the error between the target head and the actual drainage height is, the higher the accuracy is. Those skilled in the art can reasonably determine the speed step according to their needs.

[0078] Step 103: determine a target speed of the drainage pump based on the target lift, and control the drainage pump to operate at the target speed.

[0079] It can be understood that the method of the embodiment of the present application can automatically identify the target head required for the current drainage, and then automatically adjust the speed of the drainage pump based on different drainage scenarios. For example, when the ceiling height corresponding to the indoor unit is low and the drainage height is reduced, the operating speed of the drainage pump can be effectively reduced, thereby reducing the operating noise of the drainage pump and improving the user experience.

[0080] Exemplarily, determining the target lift based on the current first speed and / or the current second operating power includes:

[0081] Determine the target lift based on the current first speed and the second fitting relationship; or,

[0082] determining the target lift based on the current second operating power and the third fitting relationship; or,

[0083] Determine a first lift based on the current first speed and the second fitting relationship; determine a second lift based on the current second operating power and a third fitting relationship; determine the target lift based on the first lift and the second lift;

[0084] The second fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump in a zero flow state, and the third fitting relationship represents the corresponding relationship between the operating power and the lift of the drainage pump in a zero flow state.

[0085] According to the working characteristics of the drainage pump, under the zero flow state, that is, the current head of the drainage pump is less than the drainage height, so that the drainage flow of the drainage pump is zero, there is a specific fitting relationship between the speed and head of the drainage pump and between the operating power and head of the drainage pump. In this way, based on the simulation test, a second fitting relationship representing the corresponding relationship between the speed and head of the drainage pump under the zero flow state and / or a third fitting relationship representing the corresponding relationship between the operating power and head of the drainage pump under the zero flow state can be obtained, and the target head can be determined based on the current first speed and the second fitting relationship and / or the current second operating power and the third fitting relationship.

[0086] In an application example, the second fitting relationship of a certain model of drainage pump is as follows Figure 3As shown, under the zero flow state, the lift corresponding to multiple speeds is collected and curve fitting is performed. The second fitting relationship obtained can be expressed as: H = 0.0002n 2 +0.0098n-15.678, where the unit of lift H is millimeter (mm) and the unit of speed n is revolutions per minute (rpm).

[0087] It is understandable that when the processor increases the first speed so that the current head of the drainage pump is greater than the actual drainage height, the head corresponding to the current first speed can be obtained based on the current first speed and the second fitting relationship, and used as the target head.

[0088] In an application example, the third fitting relationship of a certain model of drainage pump is as follows: Figure 4 As shown, under the zero flow state, the lift corresponding to multiple operating powers is collected and curve fitting is performed. The third fitting relationship obtained can be expressed as: H = -16.015P 2 +605.35P+107.1, where the unit of lift H is millimeter (mm) and the unit of operating power P is kilowatt (KW).

[0089] It can be understood that when the processor increases the first speed so that the current head of the drainage pump is greater than the actual drainage height, the second operating power corresponding to the zero flow state can be determined based on the current first speed and the first fitting relationship, and the head corresponding to the current first speed can be obtained based on the second operating power and the third fitting relationship, and used as the target head.

[0090] In another application example, the first head can be determined based on the current first speed and the second fitting relationship when the drainage pump first switches to a non-zero flow state, and the second head can be determined based on the current second operating power and the third fitting relationship, and the first head and the second head are weightedly summed to obtain the target head.

[0091] Exemplarily, determining the target speed of the drainage pump based on the target lift includes:

[0092] Determining a target speed of the drainage pump based on the target lift and a fourth fitting relationship;

[0093] The fourth fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump at the rated flow rate.

[0094] It can be understood that the fourth fitting relationship can be predetermined based on simulation experiments.

[0095] It can be understood that the aforementioned second fitting relationship, third fitting relationship and fourth fitting relationship can be pre-stored in the local memory for easy access by the air conditioner processor, or can be obtained by the air conditioner processor by accessing the server, and the embodiment of the present application does not limit this.

[0096] The following is an example of an application to illustrate the control method of the drain pump of the air conditioner.

[0097] like Figure 5 As shown, the control method includes:

[0098] Step 501: The drainage pump operates at an initial first speed and obtains a first operating power Pb.

[0099] Here, after the air conditioner is started, the drainage pump can be controlled to run at a speed corresponding to the rated minimum head, and the current first operating power Pb can be obtained.

[0100] Step 502, determine whether Pb-P0 meets the requirements, if not, return to step 501, if yes, execute step 503.

[0101] Here, P0 is the no-load rated power of the drainage pump. Judging whether Pb-P0 meets the requirements refers to judging whether Pb-P0 is greater than or equal to the first set threshold value. If not, it indicates that the drainage pump is in a water-deficient operating state, and then returns to step 501, and continues to check whether the drainage pump is still in a water-deficient operating state; if Pb-P0 is greater than or equal to the first set threshold value, it is determined that the drainage pump is in a water-carrying operating state, and then executes step 503.

[0102] Step 503, determine whether |Pb-Pa| meets the requirements, if so, execute step 504 and return to step 503, if not, execute step 505.

[0103] Here, Pa is the aforementioned second operating power, that is, the second operating power determined based on the current first speed and the first fitting relationship. Judging whether |Pb-Pa| meets the requirements means judging whether |Pb-Pa| is less than the second set threshold. If so, it indicates that the drainage pump is still in a zero flow state. Then, step 505 is used to increase the first speed and re-judge whether |Pb-Pa| meets the requirements until |Pb-Pa| is greater than or equal to the second set threshold, and step 505 is executed.

[0104] Step 504, increasing the first rotation speed.

[0105] Here, the processor of the air conditioner may increase the first rotation speed based on the set rotation speed step.

[0106] Step 505, determining the target lift and controlling the drainage pump to run at the target speed.

[0107] It is understandable that the processor of the air conditioner can determine the target head based on the current first speed and the second fitting relationship and / or the current second operating power and the third fitting relationship, determine the target speed based on the target head and the fourth fitting relationship, and control the drainage pump to operate at the target speed so that the drainage pump drains water at the rated flow rate corresponding to the target head. In this way, the drainage height actually required by the drainage pump can be automatically identified, and then the speed of the drainage pump can be automatically adjusted based on different drainage scenarios. For example, when the ceiling height corresponding to the indoor unit is low and the drainage height is reduced, the running speed of the drainage pump can be effectively reduced, thereby reducing the running noise of the drainage pump and improving the user experience.

[0108] In order to implement the method of the embodiment of the present application, the embodiment of the present application also provides a control device for the drain pump of an air conditioner, which corresponds to the control method for the drain pump of the air conditioner mentioned above, and each step in the embodiment of the control method for the drain pump of the air conditioner mentioned above is also fully applicable to the embodiment of the control device for the drain pump of the air conditioner.

[0109] like Figure 6 As shown, the control device of the drainage pump of the air conditioner includes: a head determination module 601 and a drainage control module 602. The head determination module 601 is used to control the drainage pump to operate at an initial first speed and obtain a first operating power corresponding to the first speed; compare the first operating power with the second operating power, the second operating power is determined based on a first fitting relationship and the first speed, the first fitting relationship represents the corresponding relationship between the speed and the operating power of the drainage pump in a zero flow state, and the zero flow state is that the current head of the drainage pump is less than the drainage height; if the first operating power matches the second operating power, then increase the first speed until the first operating power corresponding to the increased first speed does not match the second operating power, and determine the target head based on the current first speed and / or the current second operating power; the drainage control module 602 is used to determine the target speed of the drainage pump based on the target head, and control the drainage pump to operate at the target speed.

[0110] In some embodiments, before comparing the first operating power with the second operating power, the lift determination module 601 is further configured to:

[0111] The first operating power is compared with a no-load rated power representing no-load operation of the drainage pump, and if it is determined that the difference between the first operating power and the no-load rated power is greater than or equal to a first set threshold, the comparison between the first operating power and the second operating power is performed.

[0112] In some embodiments, the lift determination module 601 compares the first operating power with the second operating power, including:

[0113] If the absolute value of the difference between the first operating power and the second operating power is less than a second set threshold, it is determined that the first operating power matches the second operating power;

[0114] If the absolute value of the difference between the first operating power and the second operating power is greater than or equal to a second set threshold, it is determined that the first operating power does not match the second operating power.

[0115] In some embodiments, the lift determination module 601 increases the first speed, including:

[0116] increasing the first speed based on a set speed step;

[0117] The set speed step is related to the determination accuracy of the target lift.

[0118] In some embodiments, the lift determination module 601 determines the target lift based on the current first speed and / or the current second operating power, including:

[0119] Determine the target lift based on the current first speed and the second fitting relationship; or,

[0120] determining the target lift based on the current second operating power and the third fitting relationship; or,

[0121] Determine a first lift based on the current first speed and the second fitting relationship; determine a second lift based on the current second operating power and a third fitting relationship; determine the target lift based on the first lift and the second lift;

[0122] The second fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump in a zero flow state, and the third fitting relationship represents the corresponding relationship between the operating power and the lift of the drainage pump in a zero flow state.

[0123] In some embodiments, the drainage control module 602 determines the target speed of the drainage pump based on the target lift, including:

[0124] Determining a target speed of the drainage pump based on the target lift and a fourth fitting relationship;

[0125] The fourth fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump at the rated flow rate.

[0126] In some embodiments, the lift determination module 601 controls the drainage pump to run at an initial first speed, including:

[0127] The drainage pump is controlled to run at a speed corresponding to the rated minimum lift.

[0128] In actual application, the lift determination module 601 and the drainage control module 602 can be implemented by a processor of the air conditioner. Of course, the processor needs to run a computer program in the memory to implement its functions.

[0129] It should be noted that: the control device for the drain pump of the air conditioner provided in the above embodiment only uses the division of the above program modules as an example when controlling the drain pump. In actual applications, the above processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the processing described above. In addition, the control device for the drain pump of the air conditioner provided in the above embodiment and the control method embodiment of the drain pump of the air conditioner belong to the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0130] Based on the hardware implementation of the above program modules and in order to implement the method of the embodiment of the present application, the embodiment of the present application also provides an air conditioner. Figure 7 Only an exemplary structure of the air conditioner is shown, not all structures, and it can be implemented as needed. Figure 7 Partial or complete structure shown.

[0131] It can be understood that the air conditioner of the embodiment of the present application includes a drainage pump for lifting the water in the water receiving tray and discharging it through the drainage pipe.

[0132] like Figure 7 As shown, the air conditioner 700 provided in the embodiment of the present application includes: at least one processor 701, a memory 702 and a user interface 703. The various components in the air conditioner 700 are coupled together through a bus system 704. It can be understood that the bus system 704 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 704 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, in Figure 7 Various buses are labeled as bus system 704 .

[0133] The user interface 703 may include a display, a keyboard, a mouse, a trackball, a click wheel, keys, buttons, a touch pad or a touch screen.

[0134] The memory 702 in the embodiment of the present application is used to store various types of data to support the operation of the air conditioner. Examples of such data include: any computer program used to operate on the air conditioner.

[0135] The control method of the air conditioner disclosed in the embodiment of the present application can be applied to the processor 701, or implemented by the processor 701. The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the control method of the air conditioner can be completed by the hardware integrated logic circuit or software instructions in the processor 701. The above-mentioned processor 701 can be a general-purpose processor, a digital signal processor (DSP, Digital Signal Processor), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The processor 701 can implement or execute the various methods, steps and logic block diagrams disclosed in the embodiment of the present application. The general-purpose processor can be a microprocessor or any conventional processor, etc. In combination with the steps of the method disclosed in the embodiment of the present application, it can be directly embodied as a hardware decoding processor to execute, or it can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium, which is located in the memory 702. The processor 701 reads the information in the memory 702 and completes the steps of the control method of the air conditioner provided in the embodiment of the present application in combination with its hardware.

[0136] In an exemplary embodiment, the air conditioner can be implemented by one or more application specific integrated circuits (ASIC), DSP, programmable logic device (PLD), complex programmable logic device (CPLD), field programmable gate array (FPGA), general processor, controller, microcontroller (MCU), microprocessor, or other electronic components to execute the aforementioned method.

[0137] It can be understood that the memory 702 can be a volatile memory or a non-volatile memory, and can also include both volatile and non-volatile memories. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface memory, an optical disk, or a compact disc read-only memory (CD-ROM); the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM, SyncLink Dynamic Random Access Memory), and direct RAM bus random access memory (DRRAM, Direct Rambus Random Access Memory).The memories described in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0138] In an exemplary embodiment, the present application also provides a storage medium, namely a computer storage medium, which can be a computer-readable storage medium, for example, a memory 702 storing a computer program, and the computer program can be executed by a processor 701 of the air conditioner to complete the steps described in the method of the present application. The computer-readable storage medium can be a memory such as a ROM, a PROM, an EPROM, an EEPROM, a Flash Memory, a magnetic surface memory, an optical disk, or a CD-ROM.

[0139] It should be noted that: "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0140] In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict.

[0141] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for controlling a drainage pump of an air conditioner, characterized in that: include: Controlling the drainage pump to operate at an initial first speed, and obtaining a first operating power corresponding to the first speed; comparing the first operating power with a second operating power, the second operating power being determined based on a first fitting relationship and the first speed, the first fitting relationship representing a corresponding relationship between the speed and the operating power of the drainage pump in a zero flow state, the zero flow state being that a current head of the drainage pump is less than a drainage height; If the first operating power matches the second operating power, the first speed is increased until the first operating power corresponding to the increased first speed does not match the second operating power, and a target lift is determined based on the current first speed and / or the current second operating power; A target speed of the drainage pump is determined based on the target lift, and the drainage pump is controlled to operate at the target speed.

2. The method according to claim 1, characterized in that Before comparing the first operating power with the second operating power, the method further includes: The first operating power is compared with a no-load rated power representing no-load operation of the drainage pump, and if it is determined that the difference between the first operating power and the no-load rated power is greater than or equal to a first set threshold, the comparison between the first operating power and the second operating power is performed.

3. The method according to claim 1, characterized in that The comparing the first operating power with the second operating power comprises: If the absolute value of the difference between the first operating power and the second operating power is less than a second set threshold, it is determined that the first operating power matches the second operating power; If the absolute value of the difference between the first operating power and the second operating power is greater than or equal to a second set threshold, it is determined that the first operating power does not match the second operating power.

4. The method according to claim 1, characterized in that The increasing the first rotation speed comprises: increasing the first speed based on a set speed step; The set speed step is related to the determination accuracy of the target lift.

5. The method according to claim 1, characterized in that The determining the target lift based on the current first speed and / or the current second operating power comprises: Determine the target lift based on the current first speed and the second fitting relationship; or, determining the target lift based on the current second operating power and the third fitting relationship; or, Determine a first lift based on the current first speed and the second fitting relationship; determine a second lift based on the current second operating power and a third fitting relationship; determine the target lift based on the first lift and the second lift; The second fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump in a zero flow state, and the third fitting relationship represents the corresponding relationship between the operating power and the lift of the drainage pump in a zero flow state.

6. The method according to claim 1, characterized in that The step of determining the target rotation speed of the drainage pump based on the target lift comprises: Determining a target speed of the drainage pump based on the target lift and a fourth fitting relationship; The fourth fitting relationship represents the corresponding relationship between the rotation speed and the lift of the drainage pump at the rated flow rate.

7. The method according to claim 1, characterized in that The step of controlling the drainage pump to operate at an initial first speed includes: The drainage pump is controlled to run at a speed corresponding to the rated minimum lift.

8. A control device for a drainage pump of an air conditioner, characterized in that: include: A lift determination module, used to control the drainage pump to operate at an initial first speed and obtain a first operating power corresponding to the first speed; comparing the first operating power with a second operating power, the second operating power being determined based on a first fitting relationship and the first speed, the first fitting relationship representing a corresponding relationship between the speed and the operating power of the drainage pump in a zero flow state, the zero flow state being that a current lift of the drainage pump is less than a drainage height; If the first operating power matches the second operating power, the first speed is increased until the first operating power corresponding to the increased first speed does not match the second operating power, and a target lift is determined based on the current first speed and / or the current second operating power; The drainage control module is used to determine a target speed of the drainage pump based on the target lift, and control the drainage pump to operate at the target speed.

9. An air conditioner, characterized in that: The air conditioner includes a drain pump, and the air conditioner also includes a processor and a memory for storing a computer program that can be run on the processor, wherein: The processor is used to execute the steps of the method according to any one of claims 1 to 7 when running a computer program.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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