A control method and device of a central air conditioner, an electronic device, and a storage medium

Abstract

The application discloses a central air conditioner control method and device, electronic equipment and storage medium; the method comprises the following steps: calculating a pre-cooling / pre-heating start time according to a predetermined period; if the current time is equal to the pre-cooling / pre-heating start time from the cleaning start time, the central air conditioner is controlled to switch from the normal mode to the pre-cooling / pre-heating mode; if the current time reaches the cleaning start time, the central air conditioner is controlled to switch from the pre-cooling / pre-heating mode to the cleaning compensation mode; after running for a predetermined time length in the cleaning compensation mode, the central air conditioner is controlled to switch from the cleaning compensation mode to the rapid recovery mode; in the rapid recovery mode, the temperature and humidity of air are detected, and if the temperature and humidity of air meet the standard conditions, the central air conditioner is controlled to switch from the rapid recovery mode to the normal mode. The application can effectively avoid the drastic fluctuation of indoor air temperature and humidity during cleaning, guarantee the stable production environment of the cigarette making workshop, and realize the balance between cleaning and system efficiency.

Description

Technical Field

[0001] This application relates to the field of automatic control technology, and in particular to a control method, device, electronic equipment and storage medium for a central air conditioning system. Background Technology

[0002] In critical production areas such as the cigarette making and packaging workshop, equipment cleaning, commonly known as "blowing out the machines," is required every morning. This process raises large amounts of tobacco shreds, tobacco dust, and ash into the air. If the central air conditioning return air fan continues to run during this time, a large amount of pollutants will enter the air conditioning system, causing scale buildup in the return air ducts and rapid clogging of filters, severely shortening filter life and increasing maintenance costs. A common temporary measure is to shut down the return air fan and operate with 100% fresh air. However, the outdoor air temperature and humidity often differ significantly from the process requirements of the cigarette making and packaging workshop, causing the temperature and humidity in the workshop to deviate significantly from the set values, affecting key quality indicators such as cigarette weight and moisture content. Current technology lacks an effective control method that can both effectively isolate pollutants and maintain stable air temperature and humidity during cleaning. In other words, when cleaning and maintaining places with high requirements for temperature, humidity and cleanliness, such as the roll-to-roll packaging workshop, the existing central air conditioning system directly switches to the fresh air mode, which can easily cause drastic fluctuations in indoor temperature and humidity and poor environmental stability. At the same time, the supply air temperature and humidity lack dynamic adjustment during the cleaning process, and the mode switch is abrupt after cleaning, resulting in slow recovery of the indoor environment and affecting the normal production process in the workshop. In addition, the system mode switch has a large impact and insufficient operational stability. Summary of the Invention

[0003] This application provides a control method, device, electronic equipment, and storage medium for a central air conditioning system, which can effectively avoid drastic fluctuations in indoor air temperature and humidity during cleaning, ensure a stable production environment in the roll-to-roll packaging workshop, shorten the environmental recovery time after cleaning, avoid the impact on fan load caused by abrupt mode switching, and achieve a balance between cleaning maintenance and system performance.

[0004] In a first aspect, embodiments of this application provide a control method for a central air conditioning system, the method comprising:

[0005] Calculate the precooling / preheating start time according to the predetermined cycle;

[0006] If the current time is equal to the preset cleaning start time, the central air conditioning will switch from normal mode to pre-cooling / preheating mode; in pre-cooling / preheating mode, the central air conditioning will operate at the preset cooling / heating temperature.

[0007] If the current time reaches the preset cleaning start time, control the central air conditioning to switch from pre-cooling / preheating mode to cleaning compensation mode; in cleaning compensation mode, turn off the return air fan of the central air conditioning and use fresh air operation, while calculating the target values ​​of supply air temperature and supply air humidity in real time, and supplying air according to the real-time calculated target values ​​of supply air temperature and supply air humidity.

[0008] After running in clean compensation mode for a predetermined period of time, the central air conditioning system switches from clean compensation mode to quick recovery mode; in quick recovery mode, the return air fan of the central air conditioning system is turned on, and the system gradually recovers from 100% fresh air operation to return air operation.

[0009] In the quick recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioning is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioning is located meet the corresponding standards, the central air conditioning is controlled to switch from quick recovery mode to normal mode.

[0010] Secondly, embodiments of this application also provide a control device for a central air conditioning system, the device comprising: a time calculation module and a mode control module; wherein,

[0011] The time calculation module is used to calculate the precooling / preheating start time according to a predetermined cycle;

[0012] The mode control module is used to control the central air conditioning system to switch from normal mode to pre-cooling / preheating mode if the current time is equal to the preset cleaning start time. In pre-cooling / preheating mode, the central air conditioning system operates at the preset cooling / heating temperature. If the current time reaches the preset cleaning start time, the central air conditioning system switches from pre-cooling / preheating mode to cleaning compensation mode. In cleaning compensation mode, the return air fan of the central air conditioning system is turned off, and 100% fresh air is used. At the same time, the target values ​​of the supply air temperature and humidity are calculated in real time, and the air is supplied according to the real-time calculated target values ​​of the supply air temperature and humidity. After running in cleaning compensation mode for a predetermined time, the central air conditioning system switches from cleaning compensation mode to rapid recovery mode. In rapid recovery mode, the return air fan of the central air conditioning system is turned on, and the system gradually recovers from 100% fresh air operation to return air operation. In rapid recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioning system is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioning system is located meet the corresponding compliance conditions, the central air conditioning system switches from rapid recovery mode to normal mode.

[0013] Thirdly, embodiments of this application provide an electronic device, including:

[0014] One or more processors;

[0015] Memory, used to store one or more programs.

[0016] When the one or more programs are executed by the one or more processors, the one or more processors implement the central air conditioning control method described in any embodiment of this application.

[0017] Fourthly, embodiments of this application provide a storage medium storing a computer program thereon, which, when executed by a processor, implements the central air conditioning control method described in any embodiment of this application.

[0018] This application provides a control method, device, electronic equipment, and storage medium for a central air conditioning system. If the current time is equal to the preset cleaning start time (which is also the pre-cooling / preheating start time), the central air conditioning system is controlled to switch from normal mode to pre-cooling / preheating mode. If the current time reaches the preset cleaning start time, the central air conditioning system is controlled to switch from pre-cooling / preheating mode to cleaning compensation mode. After running in cleaning compensation mode for a predetermined period, the central air conditioning system is controlled to switch from cleaning compensation mode to rapid recovery mode. In rapid recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioning system is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioning system is located meet the corresponding compliance conditions, the central air conditioning system is controlled to switch from rapid recovery mode to normal mode. In other words, the technical solution of this application can set four operating modes for the central air conditioning system: pre-cooling / preheating mode, cleaning compensation mode, rapid recovery mode, and normal mode. By operating in stages and dynamically adjusting the target value of the supply air temperature, the operational stability of the central air conditioning system during cleaning and maintenance in the coil packaging workshop can be effectively improved, ensuring the continuity and compliance rate of the indoor production environment, shortening the environmental recovery time, reducing system operating losses, and adapting to the high-precision environmental control requirements of the coil packaging workshop. However, existing central air conditioning systems directly switch to 100% fresh air mode when cleaning and maintaining places with high requirements for temperature, humidity, and cleanliness, such as the coil packaging workshop. This can easily cause drastic fluctuations in indoor temperature and humidity, resulting in poor environmental stability. At the same time, the supply air temperature and humidity lack dynamic adjustment during the cleaning process, and the mode switch is abrupt after cleaning, resulting in slow indoor environmental recovery and affecting the normal production process in the workshop. Furthermore, the system mode switch has a large impact and insufficient operational stability. Therefore, compared with the prior art, the central air conditioning control method, device, electronic equipment and storage medium proposed in this application embodiment can effectively avoid drastic fluctuations in indoor air temperature and humidity during cleaning, ensure the stability of the production environment in the roll-to-roll packaging workshop, shorten the environmental recovery time after cleaning, avoid the impact on fan load caused by abrupt mode switching, and achieve a balance between cleaning maintenance and system efficiency; moreover, the technical solution of this application embodiment is simple and convenient to implement, easy to popularize, and has a wider range of applications. Attached Figure Description

[0019] Figure 1A schematic flowchart of a central air conditioning control method provided in an embodiment of this application;

[0020] Figure 2 A flowchart illustrating a method for calculating the target value of the supply air temperature according to an embodiment of this application;

[0021] Figure 3 A flowchart illustrating a method for calculating the target value of supply air humidity according to an embodiment of this application;

[0022] Figure 4 A schematic diagram illustrating a human-computer interaction interface provided in an embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the structure of a central air conditioning control device provided in an embodiment of this application;

[0024] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0025] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the application and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present application, not the entire structure.

[0026] Figure 1 This is a flowchart illustrating a central air conditioning control method according to an embodiment of this application. The method can be executed by a central air conditioning control device or electronic device, which can be implemented in software and / or hardware, and can be integrated into any smart device with network communication capabilities. Figure 1 As shown, the control method for central air conditioning may include the following steps:

[0027] S101. Calculate the precooling / preheating start time according to the predetermined cycle.

[0028] In this step, the precooling / preheating start time is calculated. This may include the following steps: obtaining the outdoor air temperature at the current time; calculating the difference between the outdoor air temperature at the current time and a predetermined process setpoint. The absolute value; based on a predetermined reference time. The difference between the current outdoor air temperature and the predetermined process setpoint. The absolute value, the predetermined temperature fluctuation range allowed by the process. The amount of change in outdoor air temperature within a predetermined future time period. and the pre-set construction time constant First empirical coefficient Second empirical coefficient Calculate the precooling / preheating start time. Specifically, the precooling / preheating start time can be calculated using the following formula. : ;in, The default base time is 60 minutes, which can be manually set. The difference between the current outdoor air temperature and the predetermined process setpoint. The pre-defined allowable temperature fluctuation range for the process, for example, 2°C; The change in outdoor air temperature over a predetermined future time period is a positive value. A pre-set construction time constant; and These are the first and second empirical coefficients, respectively, with a value range of 0.5-1.5. Initial values ​​can be: , Each of these can be optimized through self-learning in the future.

[0029] S102. If the current time is equal to the preset cleaning start time, the central air conditioning is controlled to switch from normal mode to pre-cooling / preheating mode; in pre-cooling / preheating mode, the central air conditioning is controlled to operate according to the preset cooling / heating temperature.

[0030] The pre-cooling / preheating mode in this embodiment is a pre-adjustment mode of the central air conditioning system before cleaning begins. Its purpose is to prepare the environment for the cleaning operation. This mode is used when the current time is equal to the preset cleaning start time, which is the pre-calculated pre-cooling / preheating start time. When the central air conditioning switches from normal mode to this mode, the central air conditioning will operate at the preset cooling temperature (pre-cooling) or heating temperature (pre-heating) to ensure that the indoor environment of the roll-and-pack workshop reaches a suitable state before cleaning starts, thus avoiding drastic fluctuations in temperature and humidity when switching to the fresh air cleaning mode later.

[0031] S103. If the current time reaches the preset cleaning start time, control the central air conditioning to switch from pre-cooling / preheating mode to cleaning compensation mode; in cleaning compensation mode, turn off the return air fan of the central air conditioning and use fresh air operation, while calculating the target values ​​of supply air temperature and supply air humidity in real time, and supply air according to the target values ​​of supply air temperature and supply air humidity calculated in real time.

[0032] The cleaning compensation mode in this embodiment is a dedicated operating mode for the cleaning phase, switched from pre-cooling / pre-heating mode by the central air conditioning system after the preset cleaning start time is reached. Its purpose is to balance cleaning effectiveness with indoor environmental stability. In this mode, the central air conditioning system shuts down the return air fan and operates with 100% fresh air to prevent dust and pollutants from flowing back during cleaning, ensuring cleaning effectiveness. Simultaneously, it calculates the target values ​​for supply air temperature and humidity in real time and strictly adheres to these real-time target values ​​for air supply, dynamically compensating for temperature and humidity deviations caused by 100% fresh air operation. This ensures that the temperature and humidity in the roll-to-roll packaging workshop remain within the production requirements during cleaning, without affecting the stability of the workshop's processes.

[0033] S104. After running in the cleaning compensation mode for a predetermined period of time, control the central air conditioning to switch from the cleaning compensation mode to the fast recovery mode; in the fast recovery mode, turn on the return air fan of the central air conditioning to gradually restore from 100% fresh air operation to return air operation.

[0034] The rapid recovery mode in this embodiment is a transitional mode switched by the central air conditioning system after a predetermined period of operation in the cleaning compensation mode. Its purpose is to ensure a smooth and rapid return of the indoor environment to production status after cleaning. In this mode, the central air conditioning system will activate the previously shut-off return air fan, gradually transitioning from the 100% fresh air operation state of the cleaning compensation mode to the return air operation state of the normal mode (gradual switching to avoid abrupt mode changes). Simultaneously, it will monitor the temperature and humidity of the air in the packaging workshop in real time. When both meet the corresponding standards, it will control the central air conditioning system to switch from this mode to the normal mode, ensuring that the workshop environment quickly returns to the standards required for production and minimizing the impact of cleaning on production progress.

[0035] S105. In the fast recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioner is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioner is located meet the corresponding compliance conditions, the central air conditioner is controlled to switch from the fast recovery mode to the normal mode.

[0036] The normal mode in this application embodiment is the regular operating mode of the central air conditioning system. It is also the starting point and ultimate goal for switching between the various special modes (pre-cooling / preheating mode, cleaning compensation mode, and rapid recovery mode) in this application, with the aim of ensuring the long-term stable production environment requirements of the coil-and-bundle workshop. In normal mode, the central air conditioning system operates according to the regular production needs of the coil-and-bundle workshop, the return air fan is turned on normally, and return air operation (not 100% fresh air) is used. There is no need to perform special operations such as pre-cooling / preheating, cleaning compensation, or gradient recovery. The temperature, humidity, and cleanliness of the workshop are continuously maintained within the preset production standard range, providing a stable and suitable normal operating environment for the coil-and-bundle process and supporting normal production in the workshop.

[0037] In a specific embodiment of this application, after cleaning, the central air conditioning system enters a rapid recovery mode and performs the following steps: 1) Gradually opening the return air: The return air damper opens at a rate of 10% / 10 seconds, while the exhaust air damper closes at the same rate. The fresh air damper gradually closes to its normal ratio, and the return air fan starts and gradually increases its speed. 2) Rapid temperature and humidity readjustment: Based on the deviation between the current workshop temperature and humidity and the set values, a PID controller is used to increase the output of cooling / heating capacity. The PID parameters can be preset. 3) Recovery completion determination: When the deviation of the workshop temperature is less than or equal to 0.5℃ and the deviation of the humidity is less than or equal to 3%RH, and these conditions are stable for 5 minutes, the central air conditioning system switches from the rapid recovery mode to the normal mode.

[0038] The central air conditioning control method proposed in this application involves controlling the central air conditioning to switch from normal mode to pre-cooling / preheating mode if the current time is equal to the preset cleaning start time. If the current time reaches the preset cleaning start time, the central air conditioning is controlled to switch from pre-cooling / preheating mode to cleaning compensation mode. After running in cleaning compensation mode for a predetermined time, the central air conditioning is controlled to switch from cleaning compensation mode to rapid recovery mode. In rapid recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioning is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioning is located meet the corresponding compliance conditions, the central air conditioning is controlled to switch from rapid recovery mode to normal mode. In other words, the technical solution of this application can set four operating modes for the central air conditioning: pre-cooling / preheating mode, cleaning compensation mode, rapid recovery mode, and normal mode. By operating in stages and dynamically adjusting the target value of the supply air temperature, the operational stability of the central air conditioning during cleaning and maintenance in the coil packaging workshop can be effectively improved, ensuring the continuity and compliance rate of the indoor production environment, shortening the environmental recovery time, reducing system operating losses, and adapting to the high-precision environmental control requirements of the coil packaging workshop. Existing central air conditioning systems, when cleaning and maintaining areas with high requirements for temperature, humidity, and cleanliness, such as roll-to-bundle workshops, directly switch to 100% fresh air mode. This easily causes drastic fluctuations in indoor temperature and humidity, resulting in poor environmental stability. Furthermore, the lack of dynamic adjustment of supply air temperature and humidity during cleaning and the abrupt mode switch after cleaning lead to slow indoor environmental recovery, affecting normal production processes. Additionally, the system experiences significant shocks during mode switching, resulting in insufficient operational stability. Therefore, compared to existing technologies, the central air conditioning control method proposed in this application can effectively avoid drastic fluctuations in indoor air temperature and humidity during cleaning, ensuring a stable production environment in the roll-to-bundle workshop. It can also shorten the environmental recovery time after cleaning, avoid the fan load impact caused by abrupt mode switching, and achieve a balance between cleaning maintenance and system efficiency. Moreover, the technical solution of this application is simple and convenient to implement, easy to popularize, and has a wider range of applications.

[0039] Figure 2This is a flowchart illustrating a method for calculating the target value of the supply air temperature according to an embodiment of this application. Further optimizations and extensions based on the above technical solution are possible, and it can be combined with the various optional implementation methods described above. For example... Figure 2 As shown, the method for calculating the target value of the supply air temperature may include the following steps:

[0040] S201. Calculate the difference between the current outdoor air temperature and the set temperature in real time.

[0041] In specific embodiments of this application, ,in, Indicates the temperature of the outdoor air. This indicates the set temperature. If... A positive value indicates that the outdoor air temperature is higher than the set temperature, and cooling is required; if... A negative value indicates that the outdoor air temperature is lower than the set temperature, requiring heating. The set temperature in this embodiment can be dynamically adjusted over time or seasonally. For example, in summer, the set temperature can be 24°C. Assuming the current outdoor air temperature is 35°C, the difference between the current outdoor air temperature and the set temperature is 11°C.

[0042] S202. If the difference between the current outdoor air temperature and the set temperature is greater than 0, calculate the first temperature offset value according to the control mode of the cooling operation, and determine the target value of the supply air temperature based on the first temperature offset value and the set temperature.

[0043] In this step, the first temperature offset value is calculated according to the control mode of the cooling condition. This can include: the opening degree of the chilled water valve of the central air conditioning system. Less than the saturation threshold of the cold water valve Or the difference between the current outdoor air temperature and the set temperature. Less than or equal to the large temperature deviation threshold Determine the first temperature offset value The value is 0; if the opening degree of the chilled water valve of the central air conditioning system is 0. Greater than or equal to the saturation threshold of the cold water valve And the difference between the current outdoor air temperature and the set temperature Greater than the temperature deviation threshold Based on the difference between the current outdoor air temperature and the set temperature and temperature large deviation threshold Determine the first temperature offset value .

[0044] For example, Case A: If the opening degree of the chilled water valve of the central air conditioning system is... Less than the saturation threshold of the cold water valve Or the difference between the current outdoor air temperature and the set temperature. Less than or equal to the large temperature deviation threshold This indicates that the central air conditioning system has sufficient cooling capacity or the deviation is minor. In this case, efforts should be made to maintain the set temperature. Therefore, the first temperature deviation value should be determined. The value is 0. Case B: If the opening degree of the central air conditioning chilled water valve is 0... Greater than or equal to the saturation threshold of the cold water valve And the difference between the current outdoor air temperature and the set temperature Greater than the temperature deviation threshold This indicates that the central air conditioning system's cooling capacity is at full load and the deviation is significant. In this case, a slight increase in the supply air temperature is permissible. The first temperature deviation value can be calculated using the following linear formula: Among them, the maximum allowable offset The coefficient 0.3 is an empirical value. Therefore, the target value for the supply air temperature is adjusted as follows: ,in, To set the temperature, This is the first temperature offset value.

[0045] S203. If the difference between the current outdoor air temperature and the set temperature is less than 0, calculate the second temperature offset value according to the control mode of the heating condition, and determine the target value of the supply air temperature based on the second temperature offset value and the set temperature.

[0046] In this step, the second temperature offset value is calculated according to the control method of the heating condition. This can include: the opening degree of the hot water valve of the central air conditioning system. Less than the saturation threshold of the hot water valve Or the difference between the current outdoor air temperature and the set temperature. The absolute value is less than or equal to the large temperature deviation threshold. Determine the second temperature offset value The value is 0; if the opening degree of the hot water valve of the central air conditioning system is 0. Greater than or equal to the saturation threshold of the hot water valve And the difference between the current outdoor air temperature and the set temperature The absolute value is greater than the temperature deviation threshold. Based on the difference between the current outdoor air temperature and the set temperature The absolute value and temperature large deviation threshold Determine the second temperature offset value .

[0047] For example, case A: If the opening degree of the hot water valve of the central air conditioning system is... Less than the saturation threshold of the hot water valve Or the difference between the current outdoor air temperature and the set temperature. The absolute value is less than or equal to the large temperature deviation threshold. This indicates that the central air conditioning system has sufficient heating capacity or the deviation is small. In this case, efforts should be made to maintain the set temperature, therefore, the second temperature deviation value is determined. The value is 0. Case B: If the opening degree of the hot water valve of the central air conditioning system is 0... Greater than or equal to the saturation threshold of the hot water valve And the difference between the current outdoor air temperature and the set temperature The absolute value is greater than the temperature deviation threshold. This indicates that the central air conditioning system's heating capacity is at full load and the deviation is significant. In this case, the supply air temperature can be appropriately reduced. The second temperature deviation value can be calculated using the following linear formula: Among them, the maximum allowable offset The coefficient 0.3 is an empirical value. Therefore, the target value for the supply air temperature is adjusted as follows: ,in, To set the temperature, This is the second temperature offset value.

[0048] The method for calculating the target value of the supply air temperature proposed in this application automatically switches between two independent control strategies—cooling and heating—based on the sign of the difference between the outdoor temperature and the set temperature. This avoids control deviations in a single set of parameters under different seasons and operating conditions, ensuring that the air conditioner can match the corresponding water valve actuators (cold water valve / hot water valve) in both cooling and heating modes. The control logic is more in line with the actual operating characteristics of the air conditioning system. Specifically, an offset value is calculated based on the actual deviation only when the deviation between the outdoor temperature and the set temperature exceeds a large deviation threshold; when the deviation is small, the offset value is 0, maintaining the original supply air temperature. On the one hand, this avoids frequent adjustments to the supply air temperature due to small fluctuations in outdoor temperature, ensuring stable indoor temperature and improving comfort. On the other hand, when the outdoor load deviates significantly from the set value, the supply air temperature is adjusted promptly through the offset value to quickly match the outdoor cooling and heating load, shortening the time it takes for the air conditioner to reach the set effect. Compared with the fixed supply air temperature control method, this application can effectively avoid slow cooling / heating caused by insufficient air conditioning capacity under high load, or energy waste caused by excessive adjustment under low load.

[0049] Figure 3 This is a flowchart illustrating a method for calculating the target value of supply air humidity according to an embodiment of this application. Further optimizations and extensions can be made based on the above technical solution, and it can be combined with the various optional implementation methods described above. For example... Figure 3 As shown, the method for calculating the target value of supply air humidity may include the following steps:

[0050] S301. Calculate the difference between the current outdoor air humidity and the preset humidity in real time.

[0051] In specific embodiments of this application, ,in, Indicates the humidity of outdoor air. Indicates the preset humidity. If... A positive value indicates that the outdoor air humidity is too high, and dehumidification is needed; if... A negative value indicates that the outdoor air humidity is too low, and humidification is needed.

[0052] S302. If the difference between the current outdoor air humidity and the set humidity is greater than 0, calculate the first humidity offset value according to the control method of dehumidification operation, and determine the target value of the supply air humidity based on the first humidity offset value and the set humidity.

[0053] In this step, the first humidity offset value is calculated according to the control method of dehumidification operation. This includes: the opening degree of the chilled water valve of the central air conditioning system. Less than the saturation threshold of the cold water valve Or the difference between the current outdoor air humidity and the set humidity. Less than or equal to the large humidity deviation threshold Determine the first humidity offset value The value is 0; if the opening degree of the chilled water valve of the central air conditioning system is 0. Greater than or equal to the saturation threshold of the cold water valve Or the difference between the current outdoor air humidity and the set humidity. Greater than the large humidity deviation threshold Based on the difference between the current outdoor air humidity and the set humidity. Humidity deviation threshold Determine the first humidity offset value .

[0054] For example, Case A: If the opening degree of the chilled water valve of the central air conditioning system is... Less than the saturation threshold of the cold water valve Or the difference between the current outdoor air humidity and the set humidity. Less than or equal to the large humidity deviation threshold This indicates that the central air conditioning system's dehumidification capacity is sufficient or only slightly off. In this case, efforts should be made to maintain the set humidity level. Therefore, the first humidity deviation value... The value is 0. Case B: If the opening degree of the central air conditioning chilled water valve is 0... Greater than or equal to the saturation threshold of the cold water valve Or the difference between the current outdoor air humidity and the set humidity. Greater than the large humidity deviation threshold This indicates that the central air conditioning system's dehumidification capacity is at full capacity and has a large deviation. At this point, it is permissible to appropriately increase the supply air humidity. The first humidity deviation value can be calculated using the following linear formula: Among them, the maximum allowable offset The coefficient 0.5 is an empirical value. At this point, the target value for the supply air humidity can be adjusted as follows: ,in, To set the humidity, This is the first humidity offset value.

[0055] S303. If the difference between the current outdoor air humidity and the set humidity is less than 0, calculate the second humidity offset value according to the control method of humidification operation, and determine the target value of the supply air humidity based on the second humidity offset value and the predetermined humidity set value.

[0056] In this step, the second humidity offset value is calculated according to the control method of the humidification operation. This includes: the opening degree of the humidification valve of the central air conditioning system. Less than the saturation threshold of the humidifier valve Or the difference between the current outdoor air humidity and the set humidity. The absolute value is less than or equal to the humidity deviation threshold. Determine the second humidity offset value The value is 0; if the opening degree of the humidification valve of the central air conditioning system is 0. Greater than or equal to the saturation threshold of the humidifier valve And the difference between the current outdoor air humidity and the set humidity. The absolute value is greater than the humidity deviation threshold. Based on the difference between the current outdoor air humidity and the set humidity. Absolute value and humidity large deviation threshold Determine the second humidity offset value .

[0057] For example, case A: If the opening degree of the humidification valve of the central air conditioning system is... Less than the saturation threshold of the humidifier valve Or the difference between the current outdoor air humidity and the set humidity. The absolute value is less than or equal to the humidity deviation threshold. This indicates that the central air conditioning system has sufficient humidification capacity or a small deviation. In this case, efforts should be made to maintain the set humidity level. Therefore, the second humidity deviation value should be determined. The value is 0. Case B: If the opening degree of the humidification valve of the central air conditioning system is... Greater than or equal to the saturation threshold of the humidifier valve And the difference between the current outdoor air humidity and the set humidity. The absolute value is greater than the humidity deviation threshold. This indicates that the central air conditioning system's cooling capacity is at full load and the deviation is significant. In this case, it is permissible to appropriately reduce the supply air humidity. The second humidity deviation value can be calculated using the following linear formula: Among them, the maximum allowable offset The coefficient 0.5 is an empirical value. Therefore, the target value for the supply air humidity should be adjusted as follows: ,in, To set the humidity, This is the second humidity offset value.

[0058] The method for calculating the target value of supply air humidity proposed in this application automatically switches between two sets of control logics—dehumidification and humidification—based on the sign of the difference between the outdoor air humidity and the set humidity. These logics correspond to the operating states of the chilled water valve and the humidification valve, respectively, avoiding control deviations caused by a single control parameter under different humidity conditions. This ensures that the air conditioning system can accurately match the actuators in both high-humidity dehumidification and low-humidity humidification scenarios, making the control logic more aligned with actual humidity adjustment needs. Specifically, this application only calculates the humidity offset value based on the actual deviation when the deviation between the outdoor humidity and the set humidity exceeds a large humidity deviation threshold; otherwise, it maintains the original supply air humidity. On the one hand, this avoids frequent adjustments to the supply air humidity for small fluctuations in outdoor humidity, ensuring stable indoor humidity and improving environmental comfort. On the other hand, when the outdoor humidity deviates significantly from the set value, it promptly adjusts the supply air humidity using the offset value, quickly matching the outdoor humidity load and shortening the time to reach the humidity target.

[0059] In a specific embodiment of this application, the central air conditioning system can further determine whether the current time period requires the central air conditioning system to control the temperature in the current environment in conjunction with the cold / heat source; if it is determined that the central air conditioning system needs to control the temperature in the current environment in conjunction with the cold / heat source in the current time period; and the current time is equal to the predetermined adjustment time from the preset cleaning start time. The central air conditioning system sends pre-adjustment commands to the cold / heat source, causing the cold / heat source to adjust the temperature of the chilled / hot water supplied to the central air conditioning system by a predetermined value in response to the pre-adjustment command. Specifically, before the cleaning compensation mode is activated, the central air conditioning system can send pre-adjustment commands to the cold / heat source via the central controller to enhance its processing capacity. For example, in summer: before cleaning begins... Every few minutes (adjustable, default 30 minutes), the chilled water supply temperature setpoint will be lowered by 2-3°C, for example, from 7°C to 5°C, while simultaneously notifying the chiller to preload. After cleaning, restore the original setpoint. Winter: Before cleaning begins. For several minutes, the hot water temperature will be increased by 5-10℃ to enhance heating capacity. After cleaning, the original settings will be restored. During transitional seasons (spring and autumn), the central air conditioning system can adjust the temperature of the current environment without the need for a cold / heat source. The specific sequence process may include the following steps: 1) The central controller of the central air conditioning system detects that the time elapsed since the start of cleaning is equal to... 1) Send a pre-adjustment command to the cold / heat source; 2) The cold / heat source confirms and begins to adjust the water temperature. The adjustment process must be completed before cleaning begins; 3) During cleaning, the cold / heat source maintains the adjusted parameters; 4) At the end of cleaning, the central controller of the central air conditioning system sends a recovery command to the cold / heat source, and the cold / heat source gradually returns to the normal set value to avoid sudden changes that could impact the system.

[0060] In a specific embodiment of this application, the central air conditioning system can also detect the current measured differential pressure of the central air conditioning filter; wherein, the current measured differential pressure is the difference between the pressure on the air inlet side and the pressure on the air outlet side of the central air conditioning filter; obtain the number of times the central air conditioning filter has been cleaned within a predetermined period; calculate the predicted lifespan of the central air conditioning filter based on the current measured differential pressure, the number of times it has been cleaned, the predetermined rated service life of the central air conditioning filter, the maximum allowable differential pressure of the central air conditioning filter, the initial differential pressure of the central air conditioning filter, and the reduction factor for the lifespan of the central air conditioning filter after each cleaning, and maintain or replace the central air conditioning filter according to the predicted lifespan; wherein, the reduction factor is obtained based on the differential pressure increment caused by each cleaning operation pre-stored in the historical database, and the differential pressure increment is the difference between the stable differential pressure of the central air conditioning filter before cleaning begins and the stable differential pressure after cleaning ends. Specifically, the differential pressure increment can be expressed as: ;in, To ensure a stable pressure differential for the central air conditioning filter before cleaning begins. This refers to the stable pressure difference of the central air conditioning filter after cleaning.

[0061] The lifetime prediction model in this application embodiment can be expressed as:

[0062] ;in, Predicted lifespan of filters for central air conditioning systems; The rated service life of the filters for central air conditioning systems; The maximum pressure differential allowed by the filters of the central air conditioning system; This refers to the current measured pressure difference of the central air conditioning filter, which is the difference between the pressure on the air inlet side and the pressure on the air outlet side of the central air conditioning filter. This refers to the initial pressure differential of the central air conditioning filter. This refers to the number of times the central air conditioning filter has been cleaned within a predetermined time period. This is a reduction factor for the lifespan of the central air conditioning filter for each cleaning operation. The reduction factor is obtained based on the pressure difference increment caused by each cleaning operation, which is pre-saved in the historical database. The pressure difference increment is the difference between the stable pressure difference of the central air conditioning filter before cleaning begins and the stable pressure difference after cleaning ends.

[0063] In a specific embodiment of this application, when When the timing is right, the human-machine interface can prompt "It is recommended to prepare spare filter parts"; when... When the timing is right, the human-machine interface can prompt "Recent filter replacement plan" when... When this happens, an alarm is triggered stating "The filter needs to be replaced and cleaned immediately."

[0064] Figure 4 This is a schematic diagram illustrating a human-machine interface provided in an embodiment of this application. The human-machine interface in this embodiment can display the following information: 1) Current operating mode: Normal mode, pre-cooling / preheating mode, cleaning compensation mode, quick recovery mode, and displays the remaining time for each mode, for example, 35 minutes remaining for the cleaning compensation mode. 2) Pre-cooling / preheating progress bar: Displays the percentage of progress towards the target values ​​for workshop temperature and humidity. 3) Real-time temperature and humidity curves: Displays the trends of workshop temperature and humidity, and supply air temperature and humidity over the past hour. 4) Cleaning compensation parameters: Displays outdoor temperature and humidity, dynamic target values, and actuator valve positions. 5) Maintenance prompt area: Filter remaining life, differential pressure increment from the last cleaning, and maintenance suggestions. 6) Estimated recovery time: Estimated based on the current deviation and historical recovery rate. 7) Operation buttons: Manual mode switching, parameter setting, and alarm confirmation.

[0065] Figure 5 This is a schematic diagram of the structure of a central air conditioning control device provided in one embodiment of this application. Figure 5 As shown, the control device of the central air conditioning system includes: a time calculation module 501 and a mode control module 502; wherein,

[0066] The time calculation module 501 is used to calculate the precooling / preheating start time according to a predetermined cycle;

[0067] The mode control module 502 is used to control the central air conditioning to switch from normal mode to pre-cooling / preheating mode if the current time is equal to the preset cleaning start time; in pre-cooling / preheating mode, control the central air conditioning to operate at the preset cooling / heating temperature; if the current time reaches the preset cleaning start time, control the central air conditioning to switch from pre-cooling / preheating mode to cleaning compensation mode; in cleaning compensation mode, turn off the return air fan of the central air conditioning and operate with 100% fresh air, while calculating the target values ​​of supply air temperature and supply air humidity in real time, and supplying air according to the real-time calculated target values ​​of supply air temperature and supply air humidity; after running in cleaning compensation mode for a predetermined time, control the central air conditioning to switch from cleaning compensation mode to rapid recovery mode; in rapid recovery mode, turn on the return air fan of the central air conditioning and gradually restore from 100% fresh air operation to return air operation; in rapid recovery mode, detect the temperature and humidity of the air in the predetermined area where the central air conditioning is located, and if the temperature and humidity of the air in the predetermined area where the central air conditioning is located meet the corresponding compliance conditions, control the central air conditioning to switch from rapid recovery mode to normal mode.

[0068] The control device for the central air conditioning described above can execute the method provided in any embodiment of this application, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the control method for the central air conditioning provided in any embodiment of this application.

[0069] Figure 6 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Figure 6 A block diagram of an exemplary electronic device suitable for implementing embodiments of the present application is shown. Figure 6 The electronic device 12 shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments of this application. The electronic device in the embodiments of this application could be a central air conditioner.

[0070] like Figure 6 As shown, the electronic device 12 is represented in the form of a general-purpose computing device. The components of the electronic device 12 may include, but are not limited to: one or more processors or processing units 16, system memory 28, and bus 18 connecting different system components (including system memory 28 and processing unit 16).

[0071] Bus 18 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0072] Electronic device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by electronic device 12, including volatile and non-volatile media, removable and non-removable media.

[0073] System memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. Electronic device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, storage system 34 may be used to read and write non-removable, non-volatile magnetic media (… Figure 6 Not shown; usually referred to as a "hard drive"). Although Figure 6 As not shown, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk") and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 via one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments of this application.

[0074] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. Program modules 42 typically perform the functions and / or methods described in the embodiments of this application.

[0075] Electronic device 12 can also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), and with one or more devices that enable a user to interact with electronic device 12, and / or with any device that enables electronic device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). This communication can be performed via input / output (I / O) interface 22. Furthermore, electronic device 12 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 20. As shown, network adapter 20 communicates with other modules of electronic device 12 via bus 18. It should be understood that, although... Figure 6 As not shown, other hardware and / or software modules may be used in conjunction with electronic device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0076] The processing unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, such as implementing the central air conditioning control method provided in the embodiments of this application.

[0077] This application also provides a computer storage medium.

[0078] The computer-readable storage medium of this application embodiment can be any combination of one or more computer-readable media. The computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. For example, a computer-readable storage medium can be—but is not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0079] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0080] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0081] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0082] This application also provides a computer program product.

[0083] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer program products, which may include one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be an application-specific or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0084] Note that the above are merely preferred embodiments and the technical principles employed in this application. Those skilled in the art will understand that this application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this application. Therefore, although this application has been described in detail through the above embodiments, this application is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the appended claims.

Claims

1. A control method for a central air conditioning system, characterized in that, The method includes: Calculate the precooling / preheating start time according to the predetermined cycle; If the current time is equal to the preset cleaning start time, the central air conditioning will switch from normal mode to pre-cooling / preheating mode; in pre-cooling / preheating mode, the central air conditioning will operate at the preset cooling / heating temperature. If the current time reaches the preset cleaning start time, control the central air conditioning to switch from pre-cooling / preheating mode to cleaning compensation mode; in cleaning compensation mode, turn off the return air fan of the central air conditioning and use fresh air operation, while calculating the target values ​​of supply air temperature and supply air humidity in real time, and supplying air according to the real-time calculated target values ​​of supply air temperature and supply air humidity. After running in clean compensation mode for a predetermined period of time, the central air conditioning system switches from clean compensation mode to quick recovery mode; in quick recovery mode, the return air fan of the central air conditioning system is turned on, and the system gradually recovers from 100% fresh air operation to return air operation. In the quick recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioning is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioning is located meet the corresponding standards, the central air conditioning is controlled to switch from quick recovery mode to normal mode.

2. The method according to claim 1, characterized in that, Calculate the precooling / preheating start time, including: Get the current outdoor air temperature; Calculate the absolute value of the difference between the current outdoor air temperature and the predetermined process setpoint; The precooling / preheating start time is calculated based on a predetermined reference time, the absolute value of the difference between the current outdoor air temperature and a predetermined process setting, a predetermined allowable temperature fluctuation range for the process, a predetermined amount of outdoor air temperature change within a predetermined future time period, and a predetermined building time constant, a first empirical coefficient, and a second empirical coefficient.

3. The method according to claim 1, characterized in that, Real-time calculation of target values ​​for supply air temperature, including: Calculate the difference between the current outdoor air temperature and the set temperature in real time; If the difference between the current outdoor air temperature and the set temperature is greater than 0, a first temperature deviation value is calculated according to the control method of cooling mode, and the target value of the supply air temperature is determined based on the first temperature deviation value and the set temperature. The calculation of the first temperature deviation value according to the control method of cooling mode includes: if the opening degree of the chilled water valve of the central air conditioner is less than the saturation threshold of the chilled water valve or the difference between the current outdoor air temperature and the set temperature is less than or equal to the large temperature deviation threshold, the first temperature deviation value is determined to be 0; if the opening degree of the chilled water valve of the central air conditioner is greater than or equal to the saturation threshold of the chilled water valve and the difference between the current outdoor air temperature and the set temperature is greater than the large temperature deviation threshold, the first temperature deviation value is determined based on the difference between the current outdoor air temperature and the set temperature and the large temperature deviation threshold. If the difference between the current outdoor air temperature and the set temperature is less than 0, a second temperature deviation value is calculated according to the control method of heating mode, and the target value of the supply air temperature is determined based on the second temperature deviation value and the set temperature. The calculation of the second temperature deviation value according to the control method of heating mode includes: if the opening degree of the hot water valve of the central air conditioning is less than the saturation threshold of the hot water valve or the absolute value of the difference between the current outdoor air temperature and the set temperature is less than or equal to the large temperature deviation threshold, the second temperature deviation value is determined to be 0; if the opening degree of the hot water valve of the central air conditioning is greater than or equal to the saturation threshold of the hot water valve and the absolute value of the difference between the current outdoor air temperature and the set temperature is greater than the large temperature deviation threshold, the second temperature deviation value is determined based on the absolute value of the difference between the current outdoor air temperature and the set temperature and the large temperature deviation threshold.

4. The method according to claim 1, characterized in that, Real-time calculation of target values ​​for supply air humidity, including: Calculate the difference between the current outdoor air humidity and the preset humidity in real time; If the difference between the current outdoor air humidity and the set humidity is greater than 0, a first humidity deviation value is calculated according to the control method of dehumidification mode, and the target value of the supply air humidity is determined based on the first humidity deviation value and the set humidity. The calculation of the first humidity deviation value according to the control method of dehumidification mode includes: if the opening degree of the central air conditioning chilled water valve is less than the saturation threshold of the chilled water valve or the difference between the current outdoor air humidity and the set humidity is less than or equal to the large humidity deviation threshold, the first humidity deviation value is determined to be 0; if the opening degree of the central air conditioning chilled water valve is greater than or equal to the saturation threshold of the chilled water valve or the difference between the current outdoor air humidity and the set humidity is greater than the large humidity deviation threshold, the first humidity deviation value is determined based on the difference between the current outdoor air humidity and the set humidity and the large humidity deviation threshold. If the difference between the current outdoor air humidity and the set humidity is less than 0, a second humidity deviation value is calculated according to the control method of humidification mode, and the target value of supply air humidity is determined based on the second humidity deviation value and the set humidity. The calculation of the second humidity deviation value according to the control method of humidification mode includes: if the opening of the central air conditioning humidification valve is less than the saturation threshold of the humidification valve, and the absolute value of the difference between the current outdoor air humidity and the set humidity is less than or equal to the large humidity deviation threshold, the second humidity deviation value is determined to be 0; if the opening of the central air conditioning humidification valve is equal to the saturation threshold of the humidification valve, and the absolute value of the difference between the current outdoor air humidity and the set humidity is greater than the large humidity deviation threshold, the second humidity deviation value is determined based on the absolute value of the difference between the current outdoor air humidity and the set humidity and the large humidity deviation threshold.

5. The method according to claim 1, characterized in that, Before supplying air according to the target values ​​of supply air temperature and supply air humidity calculated in real time, the method further includes: Check if the chilled water valve / hot water valve of the central air conditioning system is open to its maximum degree; If it is detected that the cold water valve / hot water valve of the central air conditioning is opened to the maximum degree, check whether the supply air temperature can reach the target value and whether the supply air humidity can reach the target value. If the supply air temperature and supply air humidity are both detected to reach the target value, the step of supplying air according to the real-time calculated target values ​​of supply air temperature and supply air humidity is executed. If it is detected that the supply air temperature cannot reach the target value and the supply air humidity cannot reach the target value, the target values ​​of supply air temperature and supply air humidity are adaptively adjusted respectively, and the air is supplied according to the adjusted supply air temperature and adjusted supply air humidity.

6. The method according to claim 1, characterized in that, The method further includes: Determine whether the central air conditioning system meets the requirements for controlling the temperature in the current environment within the current time period, in conjunction with the cold / heat source. If it is determined that a cold / heat source in conjunction with a central air conditioning system is needed to control the temperature in the current environment during the current time period; When the current time is equal to the preset cleaning start time and the preset adjustment time, the central air conditioning system sends a pre-adjustment command to the cold / heat source, causing the cold / heat source to respond to the pre-adjustment command by lowering / raising the temperature of the cold / hot water supplied to the central air conditioning system by a preset temperature value.

7. The method according to claim 1, characterized in that, The method further includes: The current measured pressure difference of the central air conditioning filter is detected; where the current measured pressure difference is the difference between the pressure on the air inlet side and the pressure on the air outlet side of the central air conditioning filter. Obtain the number of times the central air conditioning filter has been cleaned within a predetermined time period; Based on the current measured differential pressure, the number of times the filter has been cleaned, the predetermined rated service life of the central air conditioning filter, the maximum allowable differential pressure of the central air conditioning filter, the initial differential pressure of the central air conditioning filter, and the reduction factor for the filter's lifespan after each cleaning, the predicted lifespan of the central air conditioning filter is calculated, and the filter is maintained or replaced according to the predicted lifespan. The reduction factor is obtained from the differential pressure increment caused by each cleaning operation, which is pre-saved in the historical database. The differential pressure increment is the difference between the stable differential pressure of the central air conditioning filter before cleaning begins and the stable differential pressure after cleaning ends.

8. A control device for a central air conditioning system, characterized in that, The device includes: a time calculation module and a mode control module; wherein... The time calculation module is used to calculate the precooling / preheating start time according to a predetermined cycle; The mode control module is used to control the central air conditioning system to switch from normal mode to pre-cooling / preheating mode if the current time is equal to the preset cleaning start time. In pre-cooling / preheating mode, the central air conditioning system operates at the preset cooling / heating temperature. If the current time reaches the preset cleaning start time, the central air conditioning system switches from pre-cooling / preheating mode to cleaning compensation mode. In cleaning compensation mode, the return air fan of the central air conditioning system is turned off, and 100% fresh air is used. At the same time, the target values ​​of the supply air temperature and humidity are calculated in real time, and the air is supplied according to the real-time calculated target values ​​of the supply air temperature and humidity. After running in cleaning compensation mode for a predetermined time, the central air conditioning system switches from cleaning compensation mode to rapid recovery mode. In rapid recovery mode, the return air fan of the central air conditioning system is turned on, and the system gradually recovers from 100% fresh air operation to return air operation. In rapid recovery mode, the temperature and humidity of the air in the predetermined area where the central air conditioning system is located are detected. If the temperature and humidity of the air in the predetermined area where the central air conditioning system is located meet the corresponding compliance conditions, the central air conditioning system switches from rapid recovery mode to normal mode.

9. An electronic device, characterized in that, include: One or more processors; Memory, used to store one or more programs. When the one or more programs are executed by the one or more processors, the one or more processors implement the control method for a central air conditioner as described in any one of claims 1 to 7.

10. A storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the control method of the central air conditioning system as described in any one of claims 1 to 7.

Images