Air conditioning system and water pump control method and control system thereof

Abstract

The invention discloses an air conditioning system and a water pump control method and system thereof, and belongs to the technical field of air conditioning systems.The method comprises the steps that when the air conditioning system operates in a refrigeration or dehumidification mode, a water pump is started to operate, and the operation current of the water pump is detected; the running current is compared with a preset current threshold value, and the preset current threshold value is larger than the rated running current of the water pump; when the running current exceeds a preset current threshold value, it is judged that the water pump is abnormal, and a self-cleaning program is executed; wherein the self-cleaning program comprises the steps that the water pump is controlled to alternately conduct forward rotation and reverse rotation operation, and a stop interval is introduced every time the steering direction is switched. The running current of the water pump is detected and compared with the preset current threshold value, when the current is abnormal, the self-cleaning program including positive and negative rotation alternation and stop interval is executed, the problem of drainage faults caused by the fact that the water pump is stuck by impurities is solved, and the running reliability of the air conditioner system is improved.

Description

Technical Field

[0001] This invention belongs to the field of air conditioning system technology, and more specifically, relates to an air conditioning system and its water pump control method and control system. Background Technology

[0002] When an air conditioner is running in cooling mode, condensation continuously forms on the surface of its internal evaporator, requiring effective drainage. Currently, the industry commonly uses natural drainage, where the condensation is discharged by gravity through a drain pipe. However, for some ceiling-mounted air conditioners (such as recessed ceiling air conditioners), natural drainage is often not possible due to installation location limitations. In such cases, a water pump is needed to provide the necessary head for forced drainage.

[0003] In practical applications, after long-term operation, dust, suspended solids, and other impurities from the environment gradually accumulate in the condensate drain pan of an air conditioner. Some small impurities may enter the water pump with the condensate, causing the pump impeller or pump body to become stuck, affecting its normal operation and drainage function. This problem is particularly prominent during seasonal transitions: in summer, when cooling, the water pump operates to drain water, and impurities easily adhere to the internal flow channels; while in winter, when heating, the water pump is usually off, and residual impurities gradually solidify and harden in the hot air environment. When the cooling mode is restarted, these hardened substances can easily cause the water pump to seize up, preventing it from draining properly, ultimately leading to water leakage from the air conditioner and affecting the stable operation of the equipment.

[0004] Therefore, there is an urgent need to study an intelligent water pump control strategy that can automatically perform cleaning actions when the water pump malfunctions, in order to solve the jamming problem caused by impurity deposition and hardening. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an air conditioning system and its water pump control method and control system.

[0006] The present invention adopts the following technical solution.

[0007] The first aspect of the present invention provides a water pump control method for an air conditioning system, comprising: When the air conditioning system is running in cooling or dehumidification mode, the water pump starts running, and the operating current of the water pump is detected. The operating current is compared with a preset current threshold, wherein the preset current threshold is greater than the rated operating current of the water pump; When the operating current exceeds a preset current threshold, the water pump is determined to be abnormal and a self-cleaning program is executed; wherein, the self-cleaning program includes controlling the water pump to alternately rotate forward and reverse, and introducing a stop interval each time the direction of rotation is switched.

[0008] Optionally, the preset current threshold is determined by multiplying the rated operating current of the water pump by a coefficient greater than 1.

[0009] Optionally, the coefficient is an adjustable adjustment parameter, the value of which is determined according to the required self-cleaning frequency of the water pump, wherein: The higher the required self-cleaning frequency, the smaller the value of the adjustment parameter; The lower the required self-cleaning frequency, the larger the value of the adjustment parameter.

[0010] Optionally, the self-cleaning procedure includes: S1, after determining that the water pump is abnormal, control the water pump to stop for a first preset time; S2, control the water pump to run in the forward direction, and at the same time detect whether the running current exceeds the preset current threshold. If the water pump returns to normal, exit the self-cleaning program and the water pump continues to run in the forward direction; if the water pump is still abnormal, control the water pump to stop for a second preset time and execute S3. S3 controls the water pump to run in reverse for a third preset duration; S4, after the water pump stops for a fourth preset time, return to S2 until the water pump returns to normal.

[0011] Optionally, if the water pump is still malfunctioning after being repeated more than a preset number of times, the water pump is controlled to restart the self-cleaning program after a fifth preset time period of inactivity.

[0012] Optionally, when the air conditioning system exits the cooling or dehumidification mode, the water pump is controlled to run for a sixth preset time to drain the residual condensate in the water tray before being shut off.

[0013] A second aspect of the present invention provides a water pump control system for an air conditioning system, used to implement the water pump control method for an air conditioning system described in the first aspect of the present invention, the system comprising: The module consists of a current detection module, a processing and judgment module, and a drive control module, among which: The current detection module is used to detect the operating current of the water pump when the air conditioning system is running in cooling or dehumidification mode. The processing and judgment module compares the operating current with a preset current threshold and determines whether the water pump is malfunctioning. When the water pump is malfunctioning, a self-cleaning program command is triggered. The drive control module responds to the self-cleaning program command of the processing judgment module and controls the water pump to perform self-cleaning.

[0014] A third aspect of the present invention provides an air conditioning system, comprising a heat exchanger, a drip tray, a water pump, and a water pump control system for an air conditioning system as described in the second aspect of the present invention, wherein: The water collection tray is located below the heat exchanger to collect condensate. The water pump inlet is connected to the water outlet of the water receiving tray; The water pump control system of the air conditioning system described in the second aspect of the present invention is connected to the water pump and is used to detect its operating current and drive it to perform forward rotation, reverse rotation and stop operation.

[0015] A fourth aspect of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when loaded onto the processor, implements a water pump control method for an air conditioning system according to a first aspect of the present invention.

[0016] The fifth aspect of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements a water pump control method for an air conditioning system as described in the first aspect of the present invention.

[0017] Compared with the prior art, the beneficial effects of the present invention include at least the following: 1. This invention detects the operating current of the water pump and compares it with a preset current threshold. When the current is abnormal, it executes a self-cleaning program that includes alternating forward and reverse rotation and stop intervals. This solves the drainage failure problem caused by impurities jamming the water pump, realizes the automatic anti-jamming and self-recovery function of the water pump, and improves the operational reliability of the air conditioning system.

[0018] 2. This invention determines the preset current threshold by multiplying the rated operating current of the water pump by a coefficient greater than 1, which solves the problem that the current protection threshold setting relies on experience and is not scientific enough, realizes the quantification and rational setting of the threshold, and improves the accuracy of anomaly judgment.

[0019] 3. By setting the coefficients to parameters that can be adjusted according to the self-cleaning frequency requirements, this invention solves the problem of fixed self-cleaning strategies that cannot be adapted to different application scenarios, and realizes flexible configuration of cleaning sensitivity. While ensuring reliability, it optimizes system energy consumption and component life.

[0020] 4. This invention solves the problem of water pump jamming and being unable to get out of trouble by a single direction of rotation by executing a self-cleaning program that includes a cycle of "stop-forward rotation detection-stop-reverse rotation-stop". It achieves effective impact and peeling of attached impurities through bidirectional water flow pulses, thereby improving the success rate and efficiency of self-cleaning.

[0021] 5. This invention solves the problem of motor overheating and damage caused by continuous cleaning attempts by controlling the water pump to pause and restart the self-cleaning program after a delay when the self-cleaning cycle fails to succeed after exceeding a preset number of cycles. This achieves system safety protection and intelligent retry mechanism, further enhancing the robustness of control.

[0022] 6. This invention solves the problem of residual condensate in the drip tray after the air conditioner is turned off, which can easily breed bacteria and produce odors by controlling the water pump to run for a delayed period of time when the air conditioner exits the cooling / dehumidification mode. This achieves active drying and cleaning inside the system, improving the hygiene of the air conditioner and the user experience.

[0023] 7. This invention provides a water pump control system consisting of current detection, processing judgment and drive control modules, which solves the problem of hardware implementation of the above control methods, realizes the systematization and modularization of real-time monitoring and intelligent cleaning control of water pump operation status, and facilitates integration and application.

[0024] 8. By integrating the above-mentioned water pump control system into an air conditioning system that includes a heat exchanger, a water receiving pan, and a water pump, this invention solves the problems of low intelligence level and difficult maintenance of traditional air conditioning drainage systems, realizes intelligent and high reliability of the whole unit drainage function of the air conditioner, and reduces after-sales maintenance costs.

[0025] 9. The present invention solves the problems of control logic relying on dedicated hardware circuits and inconvenient upgrades by providing an electronic device that stores and executes a computer program of the control method, thereby realizing the software-based and programmable control method, making the solution easy to deploy, replicate and optimize later.

[0026] 10. By providing a computer-readable storage medium storing a computer program that implements the control method, this invention solves the problem of control program carrier and distribution, and realizes the technical solidification, dissemination and large-scale standardized application of the intelligent water pump control scheme. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the water pump control logic provided according to an embodiment of the present invention; Figure 2 This is a flowchart of a method provided according to an embodiment of the present invention; Figure 3 This is a schematic diagram of water pump self-cleaning control provided according to an embodiment of the present invention. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0029] In Embodiment 1, the present invention provides a water pump control method for an air conditioning system, such as... Figure 1 , Figure 2 As shown, it includes: Step 1: When the air conditioning system is running in cooling or dehumidification mode, the water pump starts running, and the operating current of the water pump is detected.

[0030] Step 2: Compare the operating current with a preset current threshold, wherein the preset current threshold is greater than the rated operating current of the water pump.

[0031] Preferably, the preset current threshold is determined by multiplying the rated operating current of the water pump by a coefficient greater than 1.

[0032] It should be noted that this invention determines the preset current threshold by multiplying the rated operating current of the water pump by a coefficient greater than 1, which solves the problem of unreasonable threshold setting, realizes the scientific quantification of the current threshold, avoids misjudgment or omission, and improves detection accuracy.

[0033] Preferably, the coefficient is an adjustable adjustment parameter, the value of which is determined according to the required self-cleaning frequency of the water pump, wherein: The higher the required self-cleaning frequency, the smaller the value of the adjustment parameter; The lower the required self-cleaning frequency, the larger the value of the adjustment parameter.

[0034] It should be noted that this invention solves the problem of inflexible fixed cleaning frequency by setting the coefficient as an adjustable parameter and determining its value according to the self-cleaning frequency requirements. This achieves adaptive adjustment of the cleaning frequency, optimizing system energy consumption while ensuring cleaning effectiveness. Specifically, the preset current threshold is a(1+x%), where: 'a' represents the rated operating current of the water pump; x is an adjustment parameter, and its value ranges from 5 to 100.

[0035] Specifically, the smaller the value of x, the easier it is to trigger self-cleaning, and the higher the cleaning frequency; the larger the value of x, the stricter the triggering conditions.

[0036] Step 3: When the operating current exceeds a preset current threshold, it is determined that the water pump is malfunctioning and a self-cleaning program is executed; wherein, the self-cleaning program includes controlling the water pump to alternately rotate forward and reverse, and introducing a stop interval each time the direction of rotation is switched.

[0037] It should be noted that this invention, by detecting the water pump's operating current and comparing it with a preset current threshold, executes a self-cleaning program when the current is abnormal (controlling the water pump to run in alternating forward and reverse directions and introducing a stop interval during switching). This solves the drainage failure problem caused by impurities jamming the water pump, achieving automatic cleaning and fault recovery of the water pump, and improving the reliability of the air conditioning system. Specifically, if the operating current A ≤ a(1+x%), the water pump is considered to be operating normally and will continue to operate. If the operating current A > a(1+x%), it is determined that the water pump is stuck and enters the self-cleaning mode to execute the self-cleaning program.

[0038] Preferably, the self-cleaning procedure includes: S1, after determining that the water pump is abnormal, control the water pump to stop for a first preset time; S2, control the water pump to run in the forward direction, and at the same time detect whether the running current exceeds the preset current threshold. If the water pump returns to normal, exit the self-cleaning program and the water pump continues to run in the forward direction; if the water pump is still abnormal, control the water pump to stop for a second preset time and execute S3. S3 controls the water pump to run in reverse for a third preset duration; S4, after the water pump stops for the fourth preset time, return to S2, and repeat S2~S4 until the water pump returns to normal.

[0039] It should be noted that this invention solves the problem of difficulty in restoring a water pump after it has become stuck by executing specific steps of the self-cleaning program (including stopping, forward rotation detection, reverse operation, and cyclic execution), and achieves effective removal of impurities through water flow disturbance, enabling the water pump to quickly return to normal operation.

[0040] Preferably, if the water pump is still malfunctioning after being repeated more than a preset number of times, the water pump is controlled to restart the self-cleaning program after a fifth preset time period of inactivity.

[0041] It should be noted that this invention solves the problem of motor overheating caused by continuous ineffective cleaning by controlling the water pump to stop and restarting the self-cleaning program when the self-cleaning program fails to function after being repeated more than a preset number of times. This achieves a safe retry mechanism for the system and improves reliability.

[0042] Preferably, when the air conditioning system exits the cooling or dehumidification mode, the water pump is controlled to run for a sixth preset time to drain the residual condensate in the water tray before being shut off.

[0043] It should be noted that this invention solves the problem of draining residual condensate from the drip tray by controlling the water pump to run for a delayed period when the air conditioning system exits cooling or dehumidification mode, thus achieving internal cleaning and drying of the system and preventing bacterial growth and odor generation.

[0044] Specifically, the stop interval and forward / reverse running duration included in the self-cleaning process are time parameters optimized by simulating and testing the removal effect of hardened impurities attached to the water pump, in order to generate specific water flow disturbances or pulses that can effectively wet, soften and remove the hardened impurities.

[0045] In Embodiment 2, the present invention provides a water pump control system for an air conditioning system, used to implement the water pump control method for an air conditioning system described in Embodiment 1. The system includes: The module consists of a current detection module, a processing and judgment module, and a drive control module, among which: The current detection module is used to detect the operating current of the water pump when the air conditioning system is running in cooling or dehumidification mode. The processing and judgment module compares the operating current with a preset current threshold and determines whether the water pump is malfunctioning. When the water pump is malfunctioning, a self-cleaning program command is triggered. The drive control module responds to the self-cleaning program command of the processing judgment module and controls the water pump to perform self-cleaning.

[0046] It should be noted that this invention solves the hardware implementation problem of water pump control methods by providing a water pump control system for an air conditioning system, realizing real-time monitoring of the water pump's operating status and automatic cleaning control, thus improving system integration. In Embodiment 3, the present invention provides an air conditioning system comprising a heat exchanger, a drip tray, a water pump, and a water pump control system as described in Embodiment 2, wherein: The water collection tray is located below the heat exchanger to collect condensate. The water pump inlet is connected to the water outlet of the water receiving tray; The water pump control system of the air conditioning system described in Embodiment 2 is connected to the water pump and is used to detect its operating current and drive it to perform forward, reverse and stop operations.

[0047] It should be noted that by integrating the water pump control system into the air conditioning system, this invention solves the problem of insufficient intelligence in the air conditioning drainage system, achieves overall performance optimization of the air conditioning system, and improves drainage reliability and maintenance convenience.

[0048] Embodiment 4 of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is loaded onto the processor, it implements a water pump control method for an air conditioning system according to Embodiment 1.

[0049] It should be noted that the present invention provides an electronic device that stores and executes a computer program to implement a water pump control method, thereby solving the problem that the implementation of the method depends on dedicated hardware, realizing software-based control and scalability, and facilitating deployment and updates.

[0050] Embodiment 5 of the present invention provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements a water pump control method for an air conditioning system according to Embodiment 1.

[0051] It should be noted that this invention solves the problem of program storage and distribution by providing a computer-readable storage medium for storing a computer program to implement a water pump control method, thereby achieving the method's wide applicability and convenience and supporting large-scale applications.

[0052] Example 6 of this invention provides an application example of a water pump control method for an air conditioning system, including: An air conditioning system comprises a heat exchanger, a water tray, a water pump, and a controller.

[0053] The water pump is connected to the air conditioning unit through a controller. The controller can detect the water pump's operating current A in real time and can also input signals to control the water pump to rotate forward and backward. When the water pump rotates forward, it can meet the normal drainage requirements.

[0054] The specific control methods are as follows: When the unit is turned on and running in cooling or dehumidification mode, the water pump starts running and the water pump operating current A is monitored in real time. When the water pump operating current A is detected to be ≤ a(1+x%) of the rated operating current of the unit, the water pump is considered to be running normally and will continue to run, where x takes the value of 5 to 100.

[0055] If the pump operating current A > a(1+x%) is detected, it is considered that the pump is stuck and needs to enter the pump self-cleaning mode.

[0056] The preset current threshold is calculated using the formula a(1+x%), where a is the rated operating current of the water pump and x is an adjustable parameter.

[0057] The specific value of the adjustment parameter x is mainly determined based on the system's requirements for the self-cleaning frequency of the water pump.

[0058] Its design logic is as follows: The smaller the given value of x, the closer the current threshold a(1+x%) is to the rated current a, making it easier for the system to meet the conditions for automatically entering the cleaning program (i.e., A>a(1+x%)), and thus the more frequently the water pump performs cleaning. Conversely, the larger the given value of x, the more difficult it is to enter the self-cleaning condition.

[0059] Generally speaking, when setting up the program, in order to prioritize ensuring that the water pump is not blocked by dirt, the x value tends to be set to a smaller value to increase the cleaning frequency, thereby significantly reducing the probability that the water pump will be completely blocked due to hardened impurities.

[0060] By configuring different x values, this invention can flexibly adapt to air conditioning products with different usage environments and reliability requirements.

[0061] The water pump self-cleaning modes include: When the controller detects that the water pump's operating current exceeds the threshold and determines that it is stuck, it starts the self-cleaning program, which executes cyclically according to a preset timing logic, such as... Figure 3 As shown, the specific process is as follows: First, control the water pump to stop working and start timing for the first preset duration t1 seconds.

[0062] After the duration of t1 seconds, the water pump is restarted for the first time in forward rotation, and its operating current is immediately detected.

[0063] If the operating current has returned to normal (i.e., below the threshold), the self-cleaning program is exited and the water pump continues to run in the forward direction; if the operating current is still abnormal, it is determined that the water pump is continuously stalled, and the water pump is then controlled to stop again, and the second preset duration t2 seconds is started.

[0064] After the duration of t2 seconds ends, the water pump is started to reverse and continues to run for the third preset duration t3 seconds.

[0065] After the reverse operation is completed, the water pump is stopped and the fourth preset duration t4 seconds is started.

[0066] After the t4-second duration ends, the water pump is restarted in the forward direction and the operating current is immediately checked.

[0067] If the current is still abnormal, repeat the entire process starting from "control the water pump to stop working" and repeat this cycle until the water pump starts rotating in the forward direction and the operating current returns to normal.

[0068] During the cyclic execution of the above self-cleaning program, if the water pump's operating current remains abnormal during forward startup after a preset number of repetitions n (n can be 2, 3, 4, ... n), the control system will determine that the cleaning cycle has failed. At this time, the self-cleaning program will be paused, and the water pump will be stopped for a fifth preset duration t5 seconds (its typical value range is 5 to 600).

[0069] After the t5-second duration ends, the system will restart the aforementioned complete self-cleaning procedure. This "execution-judgment-pause-restart" process will repeat until the water pump finally resumes normal operation.

[0070] This mechanism, by introducing a longer interval, helps the system reset and prevents the motor from overheating due to continuous cleaning attempts, thus improving the reliability of the control and the safety of the system.

[0071] When the air conditioning system finishes cooling or dehumidifying mode, the water pump does not shut off immediately, but continues to run for a controlled delay for a sixth preset duration c seconds (typically ranging from 10 to 300).

[0072] This delay control aims to use a water pump to completely drain the residual condensate accumulated in the heat exchanger and drip tray, thereby effectively avoiding problems such as bacterial growth, odor generation, and algae growth caused by static water accumulation after shutdown, and maintaining the cleanliness and dryness of the system.

[0073] To more clearly illustrate the outstanding substantive features of this invention and the significant progress it brings to the prior art, an application example of implementing this invention is described below.

[0074] In this embodiment, an air conditioning system comprises a heat exchanger, a water tray, a water pump, and a controller. The water pump is connected to the air conditioning unit via the controller, which can continuously monitor the water pump's operating current (A) and input signals to control the pump's forward and reverse rotation. When the pump rotates forward, it ensures normal drainage.

[0075] The water pump has a rated normal operating current a (e.g., a = 0.15A), and its intelligent control and self-cleaning functions are achieved through the following methods: I. Start-up Operation and Self-Cleaning Judgment When the air conditioner is turned on and running in cooling or dehumidification mode, the water pump starts running synchronously, and the controller monitors its operating current A in real time.

[0076] If the detected operating current A is less than or equal to the preset current threshold a(1+x%) (for example, when x% is set to 20%, the current threshold is 0.15*(1+20%)=0.18A, and the measured current A=0.16A), then the water pump is determined to be operating normally, and the water pump will continue to rotate in the forward direction to drain water.

[0077] If the operating current A is detected to exceed the preset current threshold a(1+x%) (for example, the measured current A=0.5A), it is determined that the water pump is stuck or stalled, and then the water pump self-cleaning mode is triggered.

[0078] II. Self-cleaning procedure execution The self-cleaning program executes according to a preset timing logic. Its core is to generate specific water flow disturbances through alternating forward and reverse operation and intermittent stops to remove impurities.

[0079] Basic cleaning cycle: After detecting pump stall, the controller first controls the pump to stop working for t1 seconds (e.g., t1=5). Then restart the water pump in the forward direction. If the operating current is still abnormal, control it to stop again for t2 seconds (e.g., t2=1). Then start the water pump to reverse for t3 seconds (e.g., t3=3); after the reverse rotation is completed, control the water pump to stop for t4 seconds (e.g., t4=5). Then restart the water pump and check the current.

[0080] If the problem persists, repeat the above cycle of "stop-forward-stop-reverse-stop" until the current returns to normal when the water pump is running in the forward direction.

[0081] Specifically, the time parameters (t1, t2, t3, t4) were optimized by simulating and testing the removal effect on agglomerates of dust and microbial impurities commonly found in air conditioning water pumps, which harden due to moisture evaporation and hot air baking. The aim was to generate specific water flow disturbances or pulses that effectively wet, soften, and remove such hardened impurities. These parameters were optimal values ​​determined through extensive removal experiments, taking into account the physical characteristics of the hardened impurities.

[0082] Specifically, if the water pump's forward operating current remains abnormal after the above basic cleaning cycle is executed n times (e.g., n=30), the water pump will be paused for a fifth preset duration t5 seconds (e.g., t5=20), after which the self-cleaning program will be restarted. This process will repeat until the water pump returns to normal operation.

[0083] III. Power-off delay control When the air conditioning system exits cooling or dehumidification mode, the controller controls the water pump to shut down after a delay of c seconds (the value of c ranges from 10 to 300, for example).

[0084] This measure aims to drain residual condensate from the heat exchanger and drip tray to prevent water accumulation and the growth of bacteria and odors after the machine is turned off.

[0085] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A water pump control method for an air conditioning system, characterized in that, include: When the air conditioning system is running in cooling or dehumidification mode, the water pump starts running, and the operating current of the water pump is detected. The operating current is compared with a preset current threshold, wherein the preset current threshold is greater than the rated operating current of the water pump; When the operating current exceeds a preset current threshold, the water pump is determined to be abnormal and a self-cleaning program is executed; wherein, the self-cleaning program includes controlling the water pump to alternately rotate forward and reverse, and introducing a stop interval each time the direction of rotation is switched.

2. The water pump control method for an air conditioning system according to claim 1, characterized in that: The preset current threshold is determined by multiplying the rated operating current of the water pump by a coefficient greater than 1.

3. The water pump control method for an air conditioning system according to claim 2, characterized in that: The coefficient is an adjustable parameter, and the value of the adjustable parameter is determined according to the required self-cleaning frequency of the water pump, wherein: The higher the required self-cleaning frequency, the smaller the value of the adjustment parameter; The lower the required self-cleaning frequency, the larger the value of the adjustment parameter.

4. The water pump control method for an air conditioning system according to claim 1, characterized in that: The self-cleaning procedure includes: S1, after determining that the water pump is abnormal, control the water pump to stop for a first preset time; S2, control the water pump to run in the forward direction, and at the same time detect whether the running current exceeds the preset current threshold. If the water pump returns to normal, exit the self-cleaning program and the water pump continues to run in the forward direction; if the water pump is still abnormal, control the water pump to stop for a second preset time and execute S3. S3 controls the water pump to run in reverse for a third preset duration; S4, after the water pump stops for a fourth preset time, return to S2 until the water pump returns to normal.

5. The water pump control method for an air conditioning system according to claim 4, characterized in that: If the water pump is still malfunctioning after being repeated more than a preset number of times, the water pump will be controlled to restart the self-cleaning program after a fifth preset time period of inactivity.

6. The water pump control method for an air conditioning system according to claim 1, characterized in that: When the air conditioning system exits the cooling or dehumidification mode, the water pump is controlled to run for a sixth preset time to drain the residual condensate in the water tray before being shut off.

7. A water pump control system for an air conditioning system, used to implement the water pump control method for an air conditioning system according to any one of claims 1-6, the system comprising: The module consists of a current detection module, a processing and judgment module, and a drive control module, among which: The current detection module is used to detect the operating current of the water pump when the air conditioning system is running in cooling or dehumidification mode. The processing and judgment module compares the operating current with a preset current threshold and determines whether the water pump is malfunctioning. When the water pump is malfunctioning, a self-cleaning program command is triggered. The drive control module responds to the self-cleaning program command of the processing judgment module and controls the water pump to perform self-cleaning.

8. An air conditioning system comprising a heat exchanger, a drip tray, a water pump, and a water pump control system as described in claim 7, wherein: The water collection tray is located below the heat exchanger to collect condensate. The water pump inlet is connected to the water outlet of the water receiving tray; The water pump control system of the air conditioning system according to claim 7 is connected to the water pump and is used to detect its operating current and drive it to perform forward rotation, reverse rotation and stop operation.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the computer program is loaded into the processor, it implements a water pump control method for an air conditioning system according to any one of claims 1-6.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements a water pump control method for an air conditioning system as described in any one of claims 1-6.

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