Air conditioning unit control method and device, electronic equipment and readable storage medium

Abstract

This application relates to an air conditioning unit control method, device, electronic equipment, and readable storage medium, belonging to the field of air conditioning control technology. The method includes: starting the air conditioning unit's compressor, condenser fan, and spray water pump; operating the condenser fan at a corresponding initial frequency based on the ambient wet-bulb temperature, operating the spray water pump at a corresponding initial frequency based on the ambient relative humidity, and operating the compressor at a corresponding initial frequency based on the ambient relative humidity; determining the relationship between the ambient wet-bulb temperature and a preset ambient wet-bulb temperature; if the ambient wet-bulb temperature is not lower than the preset ambient wet-bulb temperature, controlling the condenser fan frequency using a target high-pressure method; if the ambient wet-bulb temperature is lower than the preset ambient wet-bulb temperature, controlling the condenser fan frequency and the spray water pump frequency using a load method. This application solves the problem of low energy efficiency in existing evaporative chiller units during partial or low-load operation due to the inability of the condenser fan and spray water pump to adaptively adjust.

Description

Technical Field

[0001] This application relates to the field of air conditioning control technology, and in particular to an air conditioning unit control method, device, electronic equipment and storage medium. Background Technology

[0002] With the acceleration of industrialization and urbanization, refrigeration equipment is increasingly widely used in various industries, especially in data centers, commercial buildings, and chemical production. Evaporative chillers, with their high efficiency and environmental friendliness, are gradually becoming the mainstream choice. Evaporative chillers utilize the principle of water evaporation to absorb heat, carrying it away from the circulating water and releasing it into the atmosphere, thus achieving effective cooling of the air conditioning system. However, in actual operation, especially under partial or low load conditions, the energy efficiency of evaporative chillers is often relatively poor.

[0003] Existing evaporative chiller units generally focus on performance optimization under full-load conditions, while neglecting energy efficiency improvements under partial or low-load conditions. Specifically, these units have significant deficiencies in the control strategies for condenser fans and spray pumps. As a key component of the unit's heat dissipation system, the condenser fan's speed is often set to a fixed value or adjusted only through simple on / off control, failing to allow for fine-tuning based on actual load changes. Similarly, the flow rate and pressure of the spray pumps are mostly fixed settings, failing to achieve dynamic matching with the unit's operating status and lacking adaptive control. This results in the condenser fan potentially operating at excessively high speeds under low-load conditions, causing unnecessary energy waste; while the spray pump may experience uneven water mist distribution due to excessive flow, affecting the evaporative cooling effect and further reducing the overall energy efficiency of the unit. Furthermore, prolonged operation under suboptimal conditions accelerates equipment wear, shortens the unit's lifespan, and increases maintenance costs. In summary, existing evaporative chiller units suffer from low energy efficiency when operating at partial or low loads because the condenser fan and spray pump cannot adaptively adjust.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This application provides an air conditioning unit control method, device, electronic equipment, and storage medium to solve the technical problem of low energy efficiency caused by the inability of the condenser fan and spray water pump to adaptively adjust when the evaporative chiller is operating under partial or low load.

[0006] According to one aspect of the embodiments of this application, this application provides an air conditioning unit control method, including: turning on the compressor, condenser fan, and spray water pump of the air conditioning unit; operating the condenser fan at a corresponding initial frequency according to the ambient wet-bulb temperature, operating the spray water pump at a corresponding initial frequency according to the ambient relative humidity, and operating the compressor at a corresponding initial frequency according to the ambient relative humidity; determining the relationship between the ambient wet-bulb temperature and a preset ambient wet-bulb temperature; if the ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, controlling the frequency of the condenser fan using a target high-pressure method; if the ambient wet-bulb temperature is less than the preset ambient wet-bulb temperature, controlling the frequency of the condenser fan and the frequency of the spray water pump using a load method.

[0007] Optionally, starting the compressor, condenser fan, and spray water pump of the air conditioning unit includes: parsing a preset timing sequence to obtain the initial operating conditions corresponding to the compressor, condenser fan, and spray water pump; wherein, the initial operating conditions of the compressor include a first start signal, the initial operating conditions of the condenser fan include the compressor reaching a preset pressure, and the initial operating conditions of the spray water pump include the condenser fan reaching a preset speed; starting the compressor according to the first start signal and monitoring the pressure of the compressor; when the pressure of the compressor reaches a preset pressure value, starting the condenser fan through a second start signal and monitoring the speed of the condenser fan; when the speed of the condenser fan reaches a preset speed, starting the spray water pump through a third start signal to initialize the air conditioning unit.

[0008] Optionally, the step of operating the condenser fan at a corresponding initial frequency based on the ambient wet-bulb temperature, operating the spray pump at a corresponding initial frequency based on the ambient relative humidity, and operating the compressor at a corresponding initial frequency based on the ambient relative humidity includes: acquiring the current ambient wet-bulb temperature and the current ambient relative humidity; determining a first initial frequency for the fan corresponding to the current ambient wet-bulb temperature, determining a second initial frequency for the pump corresponding to the current ambient relative humidity, and acquiring a third initial frequency for the compressor; operating the condenser fan at the first initial frequency, operating the spray pump at the second initial frequency, and operating the compressor at the third initial frequency.

[0009] Optionally, determining the relationship between the ambient wet-bulb temperature and a preset ambient wet-bulb temperature, and controlling the frequency of the condenser fan using a target high-pressure method if the ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, includes: acquiring the preset ambient wet-bulb temperature; determining the relationship between the current ambient wet-bulb temperature and the preset ambient wet-bulb temperature; if the current ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, calculating the difference between the current high-pressure and the target high-pressure to obtain a target deviation for the condensing temperature; and adjusting the frequency of the condenser fan according to the target deviation for the condensing temperature.

[0010] Optionally, adjusting the frequency of the condenser fan according to the target deviation of the condensing temperature includes: determining a target deviation range threshold, a first target deviation preset range, corresponding to the condensing temperature of the condenser fan; if the target deviation of the condensing temperature is greater than the maximum value of the first target deviation preset range, increasing the output frequency adjustment step of the condenser fan; if the target deviation of the condensing temperature is within the first target deviation preset range, keeping the output frequency of the condenser fan unchanged; if the target deviation of the condensing temperature is less than the minimum value of the first target deviation preset range, decreasing the output frequency adjustment step of the condenser fan.

[0011] Optionally, if the ambient wet-bulb temperature is less than a preset ambient wet-bulb temperature, then controlling the frequency of the condenser fan and the spray pump by the load method includes: if the ambient wet-bulb temperature is less than the preset ambient wet-bulb temperature, calculating the difference between the fan load of the condenser fan and the compressor load of the compressor to obtain the fan target deviation; adjusting the frequency of the condenser fan based on the fan target deviation; and adjusting the frequency of the spray pump based on the outlet relative humidity.

[0012] Optionally, adjusting the frequency of the condenser fan based on the fan target deviation includes: determining a second target deviation preset interval corresponding to the condenser fan; if the fan target deviation is within the second target deviation preset interval, keeping the frequency of the condenser fan unchanged; if the fan target deviation is greater than the maximum value of the second target deviation preset interval, decreasing the frequency of the condenser fan; and if the fan target deviation is less than the minimum value of the second target deviation preset interval, increasing the frequency of the condenser fan.

[0013] Optionally, adjusting the frequency of the spray pump based on the relative humidity of the outlet air includes: obtaining the relative humidity of the outlet air, which includes the total relative humidity of the outlet air and a preset relative humidity of the outlet air; calculating the target deviation of the spray pump based on the difference between the total relative humidity of the outlet air and the preset relative humidity of the outlet air; determining a third target deviation preset range for the spray pump; if the target deviation of the spray pump is within the third target deviation preset range, keeping the frequency of the spray pump unchanged; if the target deviation of the spray pump is greater than the maximum value of the third target deviation preset range, decreasing the frequency of the spray pump; and if the target deviation of the spray pump is less than the minimum value of the third target deviation preset range, increasing the frequency of the spray pump.

[0014] According to another aspect of the embodiments of this application, this application provides an air conditioning unit fan and water pump control device, including: a start-up module for starting the compressor, condenser fan, and spray water pump of the air conditioning unit; an operation module for operating the condenser fan at a corresponding initial frequency according to the ambient wet-bulb temperature, operating the spray water pump at a corresponding initial frequency according to the ambient relative humidity, and operating the compressor at a corresponding initial frequency according to the ambient relative humidity; a first frequency control module for determining the relationship between the ambient wet-bulb temperature and a preset ambient wet-bulb temperature, and controlling the frequency of the condenser fan by a target high-pressure method if the ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature; and a second frequency control module for controlling the frequency of the condenser fan and the spray water pump by a load method if the ambient wet-bulb temperature is less than the preset ambient wet-bulb temperature.

[0015] According to another aspect of the embodiments of this application, this application provides an electronic device, including a memory, a processor, a communication interface and a communication bus. The memory stores a computer program that can run on the processor. The memory and the processor communicate with each other through the communication bus and the communication interface. The device is characterized in that when the processor executes the computer program, it implements the instructions of the above-mentioned air conditioning unit control method.

[0016] According to another aspect of the embodiments of this application, this application also provides a readable storage medium storing program instructions, which, when read and executed by a computing device, causes the computing device to perform the above-described air conditioning unit control method.

[0017] Compared with related technologies, the technical solutions provided in this application have the following advantages:

[0018] This application, once approved, directly controls the frequency of the condenser fan by the compressor's operating load under specific ambient wet-bulb temperatures, and controls the frequency of the spray pump by the relative humidity of the evaporative condenser outlet air. This decoupled control allows the evaporative chiller unit to achieve optimal energy efficiency under partial load conditions. The operating frequencies of the condenser fan, spray pump, and compressor are dynamically adjusted based on real-time ambient wet-bulb temperature, ensuring the system maintains optimal operating conditions under varying humidity levels. This effectively addresses seasonal and weather changes, improving the system's adaptability and stability. The control logic, combining target high-pressure and load methods, intelligently selects the most suitable control strategy based on the comparison between the ambient wet-bulb temperature and preset values. When ambient humidity is high, the target high-pressure method precisely controls the condenser fan frequency to ensure stable high pressure; when humidity is low, the load method optimizes the frequencies of the condenser fan and spray pump, further improving energy efficiency. By setting target deviation ranges and adjustment steps, fine-tuning of the condenser fan and spray pump frequencies is achieved. This adjustment method not only improves control accuracy but also avoids energy loss and mechanical wear caused by frequent start-stop cycles, extending equipment lifespan. By comprehensively considering factors such as system load, ambient humidity, and outlet air relative humidity, the frequency of the condenser fan and spray pump is intelligently adjusted, effectively reducing system energy consumption and improving energy utilization. Simultaneously, it reduces unnecessary energy waste, aligning with the trend of green and environmentally friendly development. Pre-set timing for each component's startup ensures the smoothness and safety of the system startup process. Furthermore, real-time monitoring and adjustment of various parameters during control further enhances the system's stability and reliability. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the hardware environment for an air conditioning unit control method provided according to an embodiment of this application;

[0022] Figure 2 This is a flowchart illustrating an air conditioning unit control method according to an embodiment of this application;

[0023] Figure 3 This is a detailed flowchart illustrating an air conditioning unit control method according to an embodiment of this application;

[0024] Figure 4 This is a schematic diagram of an evaporative chiller system provided according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of an air conditioning unit control structure according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of an electronic device structure provided according to an embodiment of this application. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the following description, the use of suffixes such as "module," "part," or "unit" to denote elements is solely for the purpose of illustration and has no specific meaning in itself. Therefore, "module" and "part" may be used interchangeably.

[0029] In related technologies, existing evaporative chiller units suffer from low energy efficiency when operating under partial or low load because the condenser fan and spray pump cannot adaptively adjust.

[0030] To address the problems mentioned in the background art, according to one aspect of the embodiments of this application, an embodiment of an air conditioning unit control method is provided.

[0031] Optionally, in the embodiments of this application, the above method can be applied to, for example... Figure 1 The hardware environment shown consists of terminal 101 and server 103. Figure 1 As shown, server 103 is connected to terminal 101 via a network and can be used to provide services to the terminal or clients installed on the terminal. Database 105 can be set up on the server or independently of the server to provide data storage services for server 103. The network mentioned above includes, but is not limited to, wide area network, metropolitan area network or local area network. Terminal 101 includes, but is not limited to, PC, mobile phone, tablet computer, etc.

[0032] An air conditioning unit control method in this embodiment can be executed by server 103, or it can be jointly executed by server 103 and terminal 101, such as... Figure 2 and Figure 3As shown, the method may include the following steps:

[0033] S202, start the air conditioning unit's compressor, condenser fan and spray water pump;

[0034] Furthermore, S202 includes:

[0035] The initial operating conditions of the compressor, condenser fan, and spray water pump are obtained by analyzing the preset timing sequence; among them, the initial operating conditions of the compressor include the first start signal, the initial operating conditions of the condenser fan include the compressor reaching the preset pressure, and the initial operating conditions of the spray water pump include the condenser fan reaching the preset speed.

[0036] The compressor is started according to the first start signal, and the compressor pressure is monitored.

[0037] When the compressor pressure reaches the preset pressure value, the condenser fan is started via the second start signal, and the speed of the condenser fan is monitored.

[0038] When the condenser fan reaches the preset speed, the spray water pump is activated via the third start signal to initialize the air conditioning unit.

[0039] Understandably, this embodiment mainly controls the fan and water pump of the evaporative cooling air conditioning unit, such as... Figure 4 The diagram shows the system principle of an evaporative chiller unit. The specific working principle is as follows: In the compression process, compressor 401 draws in low-temperature, low-pressure refrigerant gas and compresses it into a high-temperature, high-pressure gas. In the condensation process, the high-temperature, high-pressure refrigerant gas enters the horizontal tube evaporative condenser 409, where, under the action of the condensing fan 403, heat is dissipated to the surrounding environment, and the refrigerant gas condenses into a high-pressure liquid. In the throttling process, the high-pressure liquid refrigerant passes through the electronic expansion valve 407, undergoes throttling and pressure reduction, and enters the evaporator as a low-pressure liquid refrigerant. In the evaporation process, in the shell-and-tube evaporator 408, the low-pressure liquid refrigerant evaporates into a gaseous state, absorbing a large amount of heat, thereby cooling the surrounding air or medium (such as water), generating the required cooling capacity for the system. Enhanced heat exchange is achieved by spray water pump 406 spraying water onto the packing 405 of the cooling tower or related heat exchanger, further improving heat exchange efficiency by increasing the contact area between water and air. Oil return and recirculation are achieved through the oil separator 402, which ensures that the lubricating oil in the compressor exhaust is effectively recovered, preventing it from entering other parts of the system and causing adverse effects. The recovered lubricating oil is processed and then reinjected into the compressor, achieving recirculation. The outlet air temperature and humidity sensor 404 of the control system monitors the system status and feeds back signals to the control system as needed, adjusting the operating status of components such as the compressor, fan, and electronic expansion valve to maintain the system in optimal operating condition.

[0040] In this embodiment, for example, the preset pressure of the compressor is set to 205 MPa and the preset speed of the condenser fan is set to 1500 rpm, based on the actual situation of the air conditioning unit. First, the air conditioning unit's control system sends a first start signal to the compressor. Upon receiving the first start signal, the compressor begins to work, drawing in refrigerant and compressing it. Simultaneously, the control system monitors the refrigerant pressure changes in real time. When the refrigerant pressure reaches the preset 2.5 MPa, the control system immediately sends a second start signal to the condenser fan. Upon receiving the second start signal, the condenser fan begins to rotate, and the control system monitors the condenser fan speed in real time via a speed sensor. If the condenser fan fails to start in time or its speed is abnormal, the control system will issue an alarm and attempt to restart or shut down for protection. After the condenser fan starts, its speed is continuously monitored to ensure it is stable and reaches the preset 1500 rpm. When the speed reaches the preset value of 1500 rpm, the control system sends a third start signal to the spray water pump. The spray water pump begins to work, spraying cooling water onto the condenser to help lower the refrigerant temperature and improve condensation efficiency. Simultaneously, the control system monitors the operating status of the spray water pump to ensure its normal operation.

[0041] In the above embodiments, by precisely controlling the startup sequence and conditions of each component (such as refrigerant pressure and condenser fan speed), the system is ensured to start up quickly under optimal conditions, reducing energy waste and unnecessary waiting time during startup. By monitoring the operating status of each system component in real time (such as refrigerant pressure and condenser fan speed), and issuing timely alarms and taking protective measures (such as restarting or shutting down) when abnormalities occur, system crashes or damage caused by equipment failures are effectively prevented, improving the overall stability and reliability of the system. The timely startup and stable operation of the spray water pump ensures that cooling water is evenly sprayed onto the heat exchanger, increasing the contact area between water and air, thereby improving heat exchange efficiency. This not only helps to lower the refrigerant condensation temperature and improve condensation efficiency but also helps to reduce energy consumption and extend equipment lifespan.

[0042] S204, the condenser fan operates at the corresponding initial frequency according to the ambient wet-bulb temperature, the spray water pump operates at the corresponding initial frequency according to the ambient relative humidity, and the compressor operates at the corresponding initial frequency according to the ambient relative humidity.

[0043] Furthermore, S204 includes:

[0044] Obtain the current wet-bulb temperature and current relative humidity;

[0045] Determine the first initial frequency of the fan corresponding to the current ambient wet-bulb temperature, determine the second initial frequency of the water pump corresponding to the current ambient relative humidity, and obtain the third initial frequency of the compressor;

[0046] The condenser fan operates at a first initial frequency, the spray pump operates at a second initial frequency, and the compressor operates at a third initial frequency.

[0047] In this embodiment, the initial frequency of the variable frequency fan is represented by its initial frequency. Table 1 shows the correspondence between ambient wet-bulb temperature and the initial frequency of the variable frequency fan. When the ambient wet-bulb temperature is greater than 30°C, the corresponding initial frequency of the variable frequency fan is X_fan1; when the ambient wet-bulb temperature is greater than 20°C and less than or equal to 30°C, the corresponding initial frequency of the variable frequency fan is X_fan2; and when the ambient wet-bulb temperature is less than or equal to 20°C, the corresponding initial frequency of the variable frequency fan is X_fan3. In this embodiment, the initial frequency of the variable frequency fan X_fan1 is set to 100 Hz, the initial frequency of the variable frequency fan X_fan2 is set to 80 Hz, and the initial frequency of the variable frequency fan X_fan3 is set to 60 Hz.

[0048] Table 1. Correspondence between ambient wet-bulb temperature and initial frequency of variable frequency fan

[0049]

[0050] Furthermore, the second initial frequency is represented by the initial frequency of the variable frequency water pump. Table 2 shows the correspondence between ambient relative humidity and the initial frequency of the variable frequency water pump. When the ambient relative humidity is greater than 80%, the corresponding initial frequency of the variable frequency water pump is X_P1; when the ambient relative humidity is greater than 60% and less than or equal to 80%, the corresponding initial frequency of the variable frequency water pump is X_P2; and when the ambient relative humidity is less than or equal to 60%, the corresponding initial frequency of the variable frequency water pump is X_P3. In this embodiment, the initial frequency of the variable frequency water pump X_P1 ​​is set to 40 Hz, the initial frequency of the variable frequency water pump X_P2 is set to 60 Hz, and the initial frequency of the variable frequency water pump X_P3 is set to 80 Hz.

[0051] Table 2. Correspondence between ambient relative humidity and initial frequency of variable frequency water pump

[0052]

[0053] In the above embodiments, dynamically adjusting the equipment operating frequency based on environmental parameters can reduce unnecessary energy consumption. For example, increasing the frequency of the spray pump can promote faster evaporative cooling when the relative humidity is low, while it may be necessary to reduce the frequency to avoid over-spraying when the relative humidity is high. Setting a reasonable operating frequency helps reduce mechanical stress on the equipment and extend its lifespan. For example, avoiding prolonged operation of the condenser fan and spray pump at excessively high or low frequencies can reduce wear and malfunctions. The system can adapt to the operational needs under different environmental conditions, improving its flexibility and adaptability. Whether in high-temperature and high-humidity or low-temperature and low-humidity environments, the optimal operating state of the system can be maintained by adjusting the operating frequency.

[0054] S206, determine the relationship between the ambient wet-bulb temperature and the preset ambient wet-bulb temperature. If the ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, then control the frequency of the condenser fan by the target high-pressure method.

[0055] Furthermore, S206 includes:

[0056] Obtain the preset ambient wet-bulb temperature and determine the relationship between the current ambient wet-bulb temperature and the preset ambient wet-bulb temperature;

[0057] If the current ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, the difference between the current high pressure and the target high pressure is calculated to obtain the target deviation of the condensation temperature.

[0058] Adjust the frequency of the condenser fan according to the deviation from the target condensing temperature.

[0059] In this embodiment, the current ambient wet-bulb temperature T and the preset ambient wet-bulb temperature t are first obtained, and the relationship between the current ambient wet-bulb temperature T and the preset ambient wet-bulb temperature t is determined. If the current ambient wet-bulb temperature is greater than or equal to the preset ambient wet-bulb temperature t, the frequency of the condenser fan is controlled by the target high-pressure method. Specifically, the target high-pressure method first calculates the difference between the current high-pressure and the target high-pressure as the target difference in condensing temperature, and then adjusts the frequency of the condenser fan according to the calculated target difference in condensing temperature. The target deviation in condensing temperature = high-pressure pressure - target high-pressure pressure Po. In this embodiment, the target high-pressure pressure Po is set to a range of 800~1000 kPa.

[0060] In the above embodiments, by comparing the current ambient wet-bulb temperature with a preset value, the ambient temperature state can be accurately determined. When the ambient temperature is high, the difference between the current high-pressure and the target high-pressure is calculated to obtain the target deviation of the condensing temperature, and the frequency of the condenser fan is adjusted accordingly. This helps to keep the condensing system operating within its high-efficiency operating range, reducing energy consumption and improving overall efficiency. Increasing the frequency of the condenser fan in a timely manner under high-temperature conditions can accelerate the heat exchange rate of the condenser, lower the condensing temperature, and thus improve cooling efficiency. Conversely, in low-temperature conditions, the frequency is appropriately reduced to decrease energy consumption. This intelligent adjustment mechanism not only effectively reduces operating costs but also aligns with the current trend of energy conservation and emission reduction. By precisely controlling the operating frequency of the condenser fan, the condensing system can be ensured to operate stably under different environmental conditions, helping to reduce system fluctuations and failure rates caused by changes in ambient temperature, and improving the overall stability and reliability of the system.

[0061] Specifically, adjusting the frequency of the condenser fan according to the target deviation of the condensing temperature includes:

[0062] Determine the first target deviation preset range corresponding to the condensing temperature of the condenser fan;

[0063] If the target deviation of the condensing temperature is greater than the maximum value of the preset range of the first target deviation, the output frequency adjustment step of the condensing fan will be increased.

[0064] If the target deviation of the condensing temperature is within the preset range of the first target deviation, the output frequency of the condensing fan will remain unchanged.

[0065] If the target deviation of the condensing temperature is less than the minimum value of the preset range of the first target deviation, then reduce the adjustment step of the output frequency of the condensing fan.

[0066] In this embodiment, for example, the preset range for the first target deviation of the condensing temperature of the condenser fan is between -50 and 50. When the target deviation of the condensing temperature is greater than 50, it indicates that the current condensing temperature is much higher than the target value, requiring an increase in the cooling capacity of the condenser fan. Therefore, the control system increases the adjustment step of the condenser fan's output frequency until the set maximum frequency is reached or the condensing temperature returns to a reasonable range. When the target deviation of the condensing temperature is between -50 and 50, it indicates that the condensing temperature is close to the target value, and the current fan frequency is appropriate. The control system keeps the condenser fan's output frequency constant and continuously monitors changes in the condensing temperature. When the target deviation of the condensing temperature is less than or equal to -50, it indicates that the current condensing temperature is too low, requiring a reduction in the load on the condenser fan. Therefore, the control system reduces the adjustment step of the condenser fan's output frequency until the set minimum frequency is reached or the condensing temperature drops to a reasonable range.

[0067] In the above embodiments, by setting a preset range for the first target deviation corresponding to the condensing temperature, and adjusting the output frequency of the condenser fan based on the comparison between the actual deviation and the threshold, it is possible to ensure that the condensing system operates in an optimal state under different operating conditions, thereby improving energy efficiency and reducing unnecessary energy consumption. When the target deviation of the condensing temperature is large, the adjustment step of the condenser fan's output frequency is increased to quickly respond and reduce the condensing temperature; when the deviation is small, the adjustment step is reduced to avoid instability caused by over-adjustment, thus better adapting to changes in ambient temperature and load and maintaining a stable operating state. Keeping the condenser fan's output frequency constant within the preset range of the first target deviation helps reduce frequent adjustments and fluctuations in the system, thereby reducing equipment wear and failure rate, and improving the overall system stability and reliability.

[0068] S208, if the ambient wet-bulb temperature is lower than the preset ambient wet-bulb temperature, the frequency of the condenser fan and the frequency of the spray water pump are controlled by the load method.

[0069] Furthermore, S208 includes:

[0070] If the ambient wet-bulb temperature is lower than the preset ambient wet-bulb temperature, the difference between the fan load of the condenser fan and the compressor load of the compressor is calculated to obtain the fan target deviation;

[0071] Adjust the frequency of the condenser fan based on the target deviation of the fan;

[0072] The frequency of the spray pump is adjusted based on the relative humidity of the outlet air.

[0073] In this embodiment, the target deviation of the fan is first calculated by the difference between the current fan load of the condenser fan and the high-pressure pressure of the compressor. The current fan load of the condenser fan includes parameters such as fan current and power, and the high-pressure pressure of the compressor includes the compressor load. Wherein, compressor load = operating frequency / rated frequency, and fan load = fan operating frequency / fan rated frequency. Based on the calculated target deviation of the fan, the frequency of the condenser fan is adjusted, the relative humidity of the outlet air is obtained, and the frequency of the spray pipe test pump is adjusted according to the relative humidity of the outlet air.

[0074] In the above embodiments, when the ambient wet-bulb temperature is lower than a preset value, the target deviation of the fan is obtained by calculating the difference between the fan load of the condenser fan and the compressor load of the compressor. Based on this, the frequency of the condenser fan is adjusted to ensure that the condenser fan operates at the optimal frequency under different load conditions, thereby improving the overall operating efficiency of the unit. Adjusting the frequency of the spray pump based on the relative humidity of the outlet air allows for precise control of the spray water volume. When the humidity is low, the spray water volume is reduced to avoid unnecessary energy consumption; when the humidity is high, the spray water volume is increased to improve the cooling effect, contributing to energy saving and reducing operating costs. By adjusting the frequencies of the condenser fan and the spray pump, the indoor temperature and humidity can be maintained within a comfortable range. Especially when the ambient wet-bulb temperature is low, reducing the load on the condenser fan and the spray pump can prevent excessively low indoor temperatures or excessively high humidity, thereby improving user comfort. Dynamically adjusting the frequencies of the condenser fan and the spray pump allows the system to adapt to load changes under different environmental conditions, helping to reduce system fluctuations and failure rates, and enhancing system stability and reliability.

[0075] Specifically, adjusting the frequency of the condenser fan based on the fan target deviation includes:

[0076] Determine the second target deviation preset range for the corresponding condenser fan;

[0077] If the target deviation of the fan is within the second target deviation preset range of the fan target deviation preset range, then the frequency of the condenser fan remains unchanged;

[0078] If the target deviation of the fan is greater than the maximum value of the second target deviation preset range of the fan target deviation preset range, then reduce the frequency of the condenser fan.

[0079] If the target deviation of the fan is less than the minimum value of the second target deviation preset range of the fan target deviation preset range, then the frequency of the condenser fan is increased.

[0080] In this embodiment, the second target deviation preset range corresponding to the condenser fan is first determined. For example, the second target deviation preset range is between X2 and X1. It is then determined whether the fan target deviation is within the second target deviation preset range X2 to X1, i.e., X2≤fan target deviation≤X1. If so, it indicates that the condenser fan load and compressor load are within a reasonable range, and the heat dissipation of the air conditioning unit is consistent with the condenser fan load, which can ensure high operating efficiency of the air conditioning unit under low temperature load. If the fan target deviation > X1, it indicates that the frequency of the condenser fan is too high (F0 is the current operating load). The frequency D1 of the condenser fan is reduced accordingly. The adjusted total frequency is F=F0-D1+f1 (F0 is the current operating load, f1 is the correction system). The correction system f1 is used to adjust the additional parameters of the condenser fan frequency, which can improve the accuracy and adaptability of the control system for adjusting the condenser fan frequency. If the target deviation of the fan is less than X2, it indicates that the frequency of the condenser fan is too low. Accordingly, the frequency D1 of the condenser fan is increased, and the adjusted total frequency is F = F0 + D1 + f1, thus ensuring that the air conditioning unit operates under optimal conditions. In this embodiment, the frequency D1 of the condenser fan ranges from 2 to 4 Hz. Due to various internal or external factors (such as temperature fluctuations, humidity changes, equipment aging, etc.), the actual operating effect of the condenser fan may deviate from the theoretical model. These deviations are compensated by correcting the system f1, ensuring that the frequency adjustment of the condenser fan can more accurately reach the target value. As the operating status of the air conditioning unit changes, such as changes in compressor load and ambient temperature, the optimal operating frequency of the condenser fan may also change. The correcting system f1 can be dynamically adjusted according to the real-time status of the system to ensure that the condenser fan always operates at the optimal frequency.

[0081] In the above embodiments, by calculating the target deviation of the fan in real time and comparing it with a preset range of the second target deviation, it is possible to accurately determine whether the condenser fan needs frequency adjustment. When the target deviation of the fan is within the preset range, the frequency of the condenser fan remains unchanged, avoiding unnecessary adjustments; when the deviation exceeds the preset range, the frequency of the condenser fan is adjusted according to the magnitude and direction of the deviation to ensure that the unit always operates in the optimal state, thereby improving overall operating efficiency. By precisely adjusting the frequency of the condenser fan, accurate matching of the unit load can be achieved. When the load is low, reducing the frequency of the condenser fan can reduce energy consumption; when the load is high, increasing the frequency of the condenser fan can ensure that the unit has sufficient cooling capacity. This adjustment method helps to save energy and reduce operating costs. Setting a preset range of the second target deviation and keeping the frequency of the condenser fan unchanged when the deviation is within this range helps to reduce frequent adjustments and fluctuations in the system, which can reduce equipment wear and failure rate, and improve the overall stability and reliability of the system. The ability to automatically adjust the frequency of the condenser fan according to different load conditions and operating environments enhances the adaptability and flexibility of the unit. Whether facing seasonal temperature changes or sudden load fluctuations, the unit can quickly respond and adjust to the optimal operating state.

[0082] Specifically, adjusting the frequency of the spray water pump based on the relative humidity of the outlet air includes:

[0083] Obtain the relative humidity of the outlet air, which includes the total relative humidity of the outlet air and the preset relative humidity of the outlet air.

[0084] The target deviation of the spray pump is calculated based on the difference between the total outlet relative humidity and the preset outlet relative humidity.

[0085] Determine the preset range of the third target deviation for the spray pump;

[0086] If the target deviation of the spray pump is within the preset range of the third target deviation, the frequency of the spray pump will remain unchanged.

[0087] If the target deviation of the spray pump is greater than the maximum value of the preset range of the third target deviation, then reduce the frequency of the spray pump.

[0088] If the target deviation of the spray pump is less than the minimum value of the preset range of the third target deviation, the frequency of the spray pump will be increased.

[0089] In this embodiment, the total relative humidity RH_t of the air outlet of the fan is first monitored in real time using a humidity sensor. The target deviation RH of the spray pump is calculated based on the total relative humidity RH_t and the preset relative humidity of the air outlet. Two preset thresholds, RH1 and RH2, are set to form a third target deviation preset interval [RH1, RH2]. If RH is within the interval [RH1, RH2], it indicates that the current spray heat exchange effect is at its optimal state, and there is no need to adjust the frequency of the spray pump; the current frequency P0 remains unchanged. If RH is greater than RH2, it indicates that the relative humidity of the air outlet is too high, and there may be excess water vapor being carried out. In this case, the frequency of the spray pump needs to be reduced to save water resources and electricity. The adjusted frequency P_new = P0 - D2 + p1 (p1 is the correction system). The correction system p1 is an additional parameter used to adjust the frequency of the spray pump, which can improve the accuracy and adaptability of the control system to the frequency adjustment of the spray pump. If RH is less than RH1, it indicates that the humidity of the air outlet is too low, and there may be a lot of dry air not being fully utilized. In this case, the frequency of the spray pump needs to be increased to improve the heat exchange efficiency. The adjusted frequency P_new = P0 + D2 + p1. In this embodiment, the frequency adjustment step size D2 ranges from 2 to 4 Hz. Finally, the control system sends a frequency adjustment command to the spray pump based on the judgment result, causing it to operate at the new frequency P_new. In actual operation, factors such as system aging, wear, and environmental changes (e.g., temperature, humidity) may cause deviations between the system performance and the theoretical model. These deviations can be compensated by correcting the system p1, ensuring more accurate frequency adjustment of the spray pump. In specific situations, the correcting system p1 is dynamically adjusted according to the real-time operating status of the system (e.g., refrigerant pressure, condenser fan speed, ambient temperature, etc.). This allows for more flexible responses to various changes, ensuring that the frequency of the spray pump is always kept within the optimal range.

[0090] In the above embodiments, the target deviation of the spray pump is determined by real-time acquisition of the total outlet relative humidity and the preset outlet relative humidity, and calculation of the difference between the two. This adjustment method based on actual operating parameters ensures that the spray pump operates at the optimal frequency under different humidity conditions, thereby improving the overall operating efficiency of the unit. When the outlet relative humidity is close to the preset value, the frequency of the spray pump remains unchanged to avoid unnecessary energy consumption; when the outlet relative humidity deviates significantly from the preset value, the frequency of the spray pump is adjusted according to the magnitude and direction of the deviation to quickly restore it to the preset humidity range, which helps to save energy and reduce operating costs. By adjusting the frequency of the spray pump, the spray water volume can be controlled, thereby affecting the humidity of the indoor environment. When the humidity is too high, the spray water volume is increased to reduce the humidity; when the humidity is too low, the spray water volume is reduced to maintain a suitable humidity, which helps to improve the comfort of the indoor environment and meet the actual needs of users. Setting a third target deviation preset range for the spray pump and keeping the pump frequency constant when the deviation is within this range helps reduce frequent system adjustments and fluctuations, thereby reducing equipment wear and failure rates and improving the overall stability and reliability of the system.

[0091] According to another aspect of the embodiments of this application, such as Figure 5 As shown, this application provides a control device for the fan and water pump of an air conditioning unit, comprising:

[0092] The start-up module 501 is used to start the compressor, condenser fan and spray water pump of the air conditioning unit;

[0093] The operation module 503 is used to operate the condenser fan at the corresponding initial frequency according to the ambient wet-bulb temperature, the spray water pump at the corresponding initial frequency according to the ambient relative humidity, and the compressor at the corresponding initial frequency according to the ambient relative humidity.

[0094] The first frequency control module 505 is used to determine the relationship between the ambient wet-bulb temperature and the preset ambient wet-bulb temperature. If the ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, the frequency of the condenser fan is controlled by the target high-pressure method.

[0095] The second frequency control module 507 is used to control the frequency of the condenser fan and the spray water pump by means of load method if the ambient wet-bulb temperature is lower than the preset ambient wet-bulb temperature.

[0096] It should be noted that the startup module 501 in this embodiment can be used to execute step S202 in this application embodiment, the running module 503 in this embodiment can be used to execute step S204 in this application embodiment, the first frequency control module 505 in this embodiment can be used to execute step S206 in this application embodiment, and the second frequency control module 507 in this embodiment can be used to execute step S208 in this application embodiment.

[0097] It should be noted that the examples and application scenarios implemented by the above modules and corresponding steps are the same, but are not limited to the content disclosed in the above embodiments. It should also be noted that the above modules, as part of a device, can operate in environments such as... Figure 1 The hardware environment shown can be implemented either through software or through hardware.

[0098] According to another aspect of the embodiments of this application, this application provides an electronic device, such as... Figure 6 As shown, the system includes a memory 601, a processor 603, a communication interface 605, and a communication bus 607. The memory 601 stores a computer program that can run on the processor 603. The memory 601 and the processor 603 communicate through the communication interface 605 and the communication bus 607. When the processor 603 executes the computer program, it implements the steps of the above method.

[0099] The memory and processor in the aforementioned electronic devices communicate with each other via a communication bus and communication interface. The communication bus can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc.

[0100] The memory may include random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0101] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0102] According to another aspect of the embodiments of this application, a computer program product or computer program is also provided, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the steps of any of the above embodiments.

[0103] Optionally, in embodiments of this application, the computer-readable medium is configured to store program code for a processor to perform the following steps:

[0104] Step S202: Turn on the compressor, condenser fan and spray water pump of the air conditioning unit;

[0105] Step S204: The condenser fan is operated at the corresponding initial frequency according to the ambient wet-bulb temperature, the spray water pump is operated at the corresponding initial frequency according to the ambient relative humidity, and the compressor is operated at the corresponding initial frequency according to the ambient relative humidity.

[0106] Step S206: Determine the relationship between the ambient wet-bulb temperature and the preset ambient wet-bulb temperature. If the ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, then control the frequency of the condenser fan by the target high-pressure method.

[0107] Step S208: If the ambient wet-bulb temperature is lower than the preset ambient wet-bulb temperature, the frequency of the condenser fan and the spray water pump is controlled by the load method.

[0108] Optionally, specific examples in this embodiment can refer to the examples described in the above embodiments, and will not be repeated here.

[0109] In specific implementation, the embodiments of this application can be referred to the above embodiments and have corresponding technical effects.

[0110] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions of this application, or combinations thereof.

[0111] For software implementation, the techniques described herein can be implemented through units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented within the processor or external to the processor.

[0112] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0113] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0114] In the embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple modules or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0115] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0116] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0117] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks. It should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In the absence of further restrictions, an element defined by the phrase "includes a..." does not preclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0118] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An air conditioning unit control method, characterized by, include: Turn on the air conditioning unit's compressor, condenser fan, and spray water pump; Obtain the current wet-bulb temperature and current relative humidity; Determine the first initial frequency of the fan corresponding to the current ambient wet-bulb temperature, determine the second initial frequency of the water pump corresponding to the current ambient relative humidity, and determine the third initial frequency of the compressor based on the ambient relative humidity; The condenser fan is operated at the first initial frequency, the spray pump is operated at the second initial frequency, and the compressor is operated at the third initial frequency. Obtain the preset ambient wet-bulb temperature and determine the relationship between the current ambient wet-bulb temperature and the preset ambient wet-bulb temperature; If the current ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, then the difference between the current high pressure and the target high pressure is calculated to obtain the target deviation of the condensation temperature. Adjust the frequency of the condenser fan according to the target deviation of the condensing temperature; If the ambient wet-bulb temperature is lower than the preset ambient wet-bulb temperature, the difference between the fan load of the condenser fan and the compressor load of the compressor is calculated to obtain the fan target deviation; The frequency of the condenser fan is adjusted based on the target deviation of the fan. The frequency of the spray pump is adjusted based on the relative humidity of the outlet air.

2. The air conditioning unit control method according to claim 1, characterized by, The operation of the air conditioning unit's compressor, condenser fan, and spray water pump includes: The initial operating conditions of the compressor, condenser fan, and spray water pump are obtained by analyzing the preset timing sequence; wherein, the initial operating conditions of the compressor include a first start signal, the initial operating conditions of the condenser fan include the compressor reaching a preset pressure, and the initial operating conditions of the spray water pump include the condenser fan reaching a preset speed. The compressor is started according to the first start signal, and the pressure of the compressor is monitored. When the pressure of the compressor reaches the preset pressure value, the condenser fan is turned on by the second start signal, and the speed of the condenser fan is monitored. When the condenser fan reaches the preset speed, the spray water pump is activated by the third start signal to initialize the air conditioning unit.

3. The air conditioning unit control method of claim 1, wherein, The step of adjusting the frequency of the condenser fan according to the target deviation of the condensing temperature includes: Determine the first target deviation preset range corresponding to the condensing temperature of the condensing fan; If the target deviation of the condensing temperature is greater than the maximum value of the preset range of the first target deviation, then the output frequency adjustment step of the condensing fan is increased; If the target deviation of the condensing temperature is within the preset range of the first target deviation, then the output frequency of the condensing fan remains unchanged; If the target deviation of the condensing temperature is less than the minimum value of the preset range of the first target deviation, then the output frequency adjustment step of the condensing fan is reduced.

4. The air conditioning unit control method of claim 1, wherein, The adjustment of the frequency of the condenser fan based on the target deviation of the fan includes: Determine the preset range of the second target deviation corresponding to the condenser fan; If the target deviation of the fan is within the preset range of the second target deviation, the frequency of the condenser fan remains unchanged; If the target deviation of the fan is greater than the maximum value of the preset range of the second target deviation, then the frequency of the condenser fan is reduced; If the target deviation of the fan is less than the minimum value of the preset range of the second target deviation, then the frequency of the condenser fan is increased.

5. The air conditioning unit control method of claim 1, wherein, The adjustment of the frequency of the spray water pump based on the relative humidity of the outlet air includes: The relative humidity of the outlet air is obtained, which includes the total relative humidity of the outlet air and the preset relative humidity of the outlet air. The target deviation of the spray pump is calculated based on the difference between the total outlet relative humidity and the preset outlet relative humidity; Determine the third target deviation preset range for the spray pump; If the target deviation of the spray pump is within the preset range of the third target deviation, the frequency of the spray pump remains unchanged. If the target deviation of the spray pump is greater than the maximum value of the preset range of the third target deviation, then the frequency of the spray pump is reduced. If the target deviation of the spray pump is less than the minimum value of the preset range of the third target deviation, then the frequency of the spray pump is increased.

6. An air conditioning unit fan water pump control device adapted for use in the air conditioning unit control method as set forth in any one of claims 1 to 5, characterized by include: The start-up module is used to turn on the compressor, condenser fan, and spray water pump of the air conditioning unit; The operation module is used to acquire the current ambient wet-bulb temperature and the current ambient relative humidity; determine a first initial frequency of the fan corresponding to the current ambient wet-bulb temperature, determine a second initial frequency of the water pump corresponding to the current ambient relative humidity, and determine a third initial frequency of the compressor based on the ambient relative humidity; operate the condenser fan according to the first initial frequency, operate the spray water pump according to the second initial frequency, and operate the compressor according to the third initial frequency. The first frequency control module is used to acquire the preset ambient wet-bulb temperature and determine the relationship between the current ambient wet-bulb temperature and the preset ambient wet-bulb temperature. If the current ambient wet-bulb temperature is not less than the preset ambient wet-bulb temperature, then the difference between the current high pressure and the target high pressure is calculated to obtain the condensing temperature target deviation; the frequency of the condensing fan is adjusted according to the condensing temperature target deviation. The second frequency control module is used to calculate the difference between the fan load of the condenser fan and the compressor load of the compressor if the ambient wet-bulb temperature is less than the preset ambient wet-bulb temperature, and obtain the fan target deviation; adjust the frequency of the condenser fan based on the fan target deviation; and adjust the frequency of the spray water pump based on the outlet relative humidity.

7. An electronic device comprising a memory, a processor, a communication interface, and a communication bus, wherein the memory stores a computer program executable on the processor, and the memory and the processor communicate via the communication bus and the communication interface, characterized in that, When the processor executes the computer program, it implements the instructions of the air conditioning unit control method according to any one of claims 1-5.

8. A readable storage medium storing program instructions, which, when read and executed by a computing device, cause the computing device to perform the air conditioning unit control method as described in any one of claims 1-5.

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