Fan rotating speed control method, device and equipment and storage medium

Abstract

The embodiment of the invention discloses a fan rotating speed control method, device and equipment and a storage medium. Initial fan rotating speed, first environment parameters, experiment fitting parameters and fan real-time operation duration are obtained, and compensation fan rotating speed is calculated based on the first environment parameters, the initial fan rotating speed and the experiment fitting parameters; under the condition that the real-time operation duration of the draught fan is within the first preset duration stage, the rotating speed of the draught fan is adjusted to the compensation draught fan rotating speed from the initial draught fan rotating speed; and under the condition that the real-time operation duration of the fan is within a second preset duration stage, a second environment parameter is obtained in real time, the normal fan rotating speed is calculated based on the second environment parameter, the initial fan rotating speed and the compensation fan rotating speed, and the fan rotating speed is adjusted to the normal fan rotating speed from the compensation fan rotating speed. The second preset duration stage is after the first preset duration stage. The requirement of the unit for the high wind speed in the refrigeration mode can be fully met, and accurate matching of system energy efficiency is achieved.

Description

Technical Field

[0001] This application relates to the field of computer technology, and in particular to a method, apparatus, device and storage medium for controlling the speed of a fan. Background Technology

[0002] As the core equipment of an air source heat pump air conditioning system, the fan's operational stability, control precision, and energy consumption level directly determine the working efficiency and operational safety of the entire associated system, making it indispensable in air conditioning and refrigeration scenarios. Among these, speed control is the core aspect of fan operation control; reasonable control of the fan speed is a key factor in achieving efficient and energy-saving operation of the fan and stable system output.

[0003] In related technologies, during the initial operation of a heat pump air conditioning system, the fan is often controlled to run at a fixed speed. This cannot meet the high airflow requirements needed for heat exchange between the unit and the surrounding environment when restarting after a long period of shutdown under high ambient temperature cooling conditions. As a result, the system energy efficiency cannot be accurately matched, leading to frequent high-pressure reports from the unit. Summary of the Invention

[0004] This application provides a fan speed control method, device, equipment, and storage medium, which solves the problem that in the initial stage of heat pump air conditioning system operation, using a fixed fan speed cannot meet the high airflow requirements for heat exchange between the unit and the surrounding environment when restarting after a long period of shutdown under high ambient temperature cooling conditions. This results in inaccurate system energy efficiency matching and frequent high-pressure reports from the unit. By compensating for the initial airflow based on current environmental parameters during the initial operation stage, the high airflow requirements for heat exchange between the unit and the surrounding environment after a long period of shutdown are fully met, avoiding frequent high-pressure reports. After the high-risk restart phase, dynamic control of the fan speed based on real-time environmental parameters achieves accurate matching of system energy efficiency.

[0005] In a first aspect, embodiments of this application provide a fan speed control method, comprising:

[0006] The initial fan speed, first environmental parameters, experimental fitting parameters, and real-time fan runtime are obtained. The compensated fan speed is calculated based on the first environmental parameters, the initial fan speed, and the experimental fitting parameters. If the real-time operating time of the fan is within a first preset time period, the fan speed is adjusted from the initial fan speed to the compensated fan speed. When the real-time operating time of the fan is within the second preset duration period, the second environmental parameter is acquired in real time, and the normal fan speed is calculated based on the second environmental parameter, the initial fan speed and the compensation fan speed. The fan speed is then adjusted from the compensation fan speed to the normal fan speed. The second preset duration period is after the first preset duration period.

[0007] Optionally, the first environmental parameters include: first temperature data and first compressor power, and the experimental fitting parameters include: reference ambient temperature, reference compressor power, ambient temperature compensation coefficient, and compressor power compensation coefficient.

[0008] Optionally, the step of calculating the compensated fan speed based on the first environmental parameters, the initial fan speed, and the experimental fitting parameters includes: The temperature compensation value is calculated based on the first temperature data, the reference ambient temperature, and the ambient temperature compensation coefficient; the power compensation value is calculated based on the first compressor power, the reference compressor power, and the compressor power compensation coefficient. The temperature compensation value, the power compensation value, and the preset compensation parameter are summed to obtain the compensation value. The product of the compensation value and the initial fan speed is calculated to obtain the compensated fan speed.

[0009] Optionally, adjusting the fan speed from the initial fan speed to the compensated fan speed includes: Calculate the speed difference between the initial fan speed and the compensation fan speed, and calculate the step adjustment range based on the speed difference and the preset adjustment time interval; Based on the aforementioned step adjustment range, the fan speed is adjusted stepwise from the initial fan speed until the compensated fan speed is reached.

[0010] Optionally, the second environmental parameter includes: second temperature data, second compressor power, and current condensing pressure; Accordingly, the calculation of the normal fan speed based on the second environmental parameter, the initial fan speed, and the compensated fan speed includes: The ambient temperature correction factor is calculated based on the second temperature data, the preset standard temperature data, and the preset temperature verification parameters. The condensing pressure correction factor is determined based on the current condensing pressure and the preset standard condensing pressure. The compressor load correction factor is calculated based on the second compressor power and the preset rated power. The normal fan speed is determined based on the initial fan speed, the compensated fan speed, the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient.

[0011] Optionally, determining the normal fan speed based on the initial fan speed, the compensated fan speed, the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient includes: The target fan speed is obtained by multiplying the initial fan speed by the temperature correction factor, the condensing pressure correction factor, and the compressor load correction factor. Calculate the speed difference between the target fan speed and the compensation fan speed, and determine the fine-tuning compensation value corresponding to the speed difference according to the preset control strategy; The target fan speed is corrected based on the fine-tuning compensation value to obtain the normal fan speed.

[0012] Optionally, before obtaining the initial fan speed, first environmental parameters, experimental fitting parameters, and real-time fan runtime, the method further includes: The initial fan speed is calculated based on the target air pressure, target air density, fan reference speed, measured air pressure corresponding to the fan reference speed, and experimental air density under standard operating conditions; or... The initial fan speed is calculated based on the target air volume, target air density, fan reference speed, measured air volume corresponding to the fan reference speed, and experimental air density under standard operating conditions.

[0013] In a second aspect, embodiments of this application provide a fan speed control device, comprising: The data acquisition module is used to acquire the initial fan speed, first environmental parameters, experimental fitting parameters, and real-time running time of the fan; The compensated fan speed calculation module is used to calculate the compensated fan speed based on the first environmental parameters, the initial fan speed and the experimental fitting parameters; The first speed adjustment module is used to adjust the speed of the fan from the initial fan speed to the compensated fan speed when the real-time running time of the fan is within a first preset time period. The normal fan speed determination module is used to acquire a second environmental parameter in real time when the real-time running time of the fan is within a second preset time period, and calculate the normal fan speed based on the second environmental parameter, the initial fan speed and the compensation fan speed. The second speed adjustment module is used to adjust the speed of the fan from the compensated fan speed to the normal fan speed, and the second preset time period is after the first preset time period.

[0014] In a third aspect, embodiments of this application provide an electronic device, the device comprising: one or more processors; and a storage device configured to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the fan speed control method described in the first aspect.

[0015] In a fourth aspect, embodiments of this application provide a storage medium containing computer-executable instructions, which, when executed by a computer processor, are used to perform the fan speed control method as described in the first aspect.

[0016] In this embodiment, by acquiring the initial fan speed, first environmental parameters, experimental fitting parameters, and real-time fan operating time, a compensated fan speed is calculated based on the first environmental parameters, initial fan speed, and experimental fitting parameters. If the real-time fan operating time is within a first preset duration, the fan speed is adjusted from the initial fan speed to the compensated fan speed. If the real-time fan operating time is within a second preset duration, second environmental parameters are acquired in real time, and the normal fan speed is calculated based on the second environmental parameters, initial fan speed, and compensated fan speed. The fan speed is then adjusted from the compensated fan speed to the normal fan speed. The second preset duration is after the first preset duration. In the above scheme, by compensating for the initial wind speed based on the current environmental parameters during the initial operating phase, the high wind speed required for heat exchange with the surrounding environment when the unit restarts after a long period of shutdown is fully met, avoiding frequent high-pressure reports from the unit. By dynamically controlling the fan speed based on real-time environmental parameters after the high-risk restart phase, precise matching of system energy efficiency is achieved. Attached Figure Description

[0017] Figure 1 This is a flowchart of a fan speed control method provided in an embodiment of this application; Figure 2 This is a flowchart of a fan speed adjustment method provided in an embodiment of this application; Figure 3 This is a flowchart of a method for determining the normal fan speed provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of a fan speed control device provided in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a fan speed control device provided in an embodiment of this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments of this application will be described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. It should also be noted that, for ease of description, only the parts relevant to this application are shown in the drawings, not all of them. Before discussing exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe operations (or steps) as sequential processes, many of these operations can be performed in parallel, concurrently, or simultaneously. Furthermore, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but may also have additional steps not included in the drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0019] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0020] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0021] The following description, in conjunction with the accompanying drawings, details the fan speed control method, device, equipment, and medium provided in this application through specific embodiments and application scenarios.

[0022] The fan speed control method provided in this application is used to control the air conditioning fan in a high ambient temperature air conditioning cooling mode. Based on the above application scenario, it can be understood that the execution subject of each step can be a computer device. The computer device refers to any electronic device with data computing, processing and storage capabilities, such as mobile phones, PCs (Personal Computers), tablet computers and other terminal devices, or it can be a server or other devices. This application does not limit the scope of the method.

[0023] Figure 1 This is a flowchart of a fan speed control method provided in an embodiment of this application, such as... Figure 1 As shown, it includes: S101. Obtain the initial fan speed, first environmental parameters, experimental fitting parameters, and real-time running time of the fan. Calculate the compensated fan speed based on the first environmental parameters, initial fan speed, and experimental fitting parameters.

[0024] The initial fan speed refers to the core speed at which the heat pump unit, under standard design conditions, meets basic heat exchange requirements and achieves optimal efficiency in terms of airflow-pressure-power matching. The first environmental parameter refers to the core real-time operating data collected during the initial startup phase of the heat pump unit, used to calculate the compensated fan speed. Optionally, the first environmental parameter may include the first temperature data and the first compressor power, where the first temperature data refers to the current ambient temperature at startup. The first compressor power refers to the real-time operating power of the compressor at startup. The experimental fitting parameter refers to the fixed reference parameter obtained by fitting data after extensive bench tests and actual operating condition tests of heat pump units. It serves as the calibration basis for speed compensation calculations and requires individual adjustment based on different configurations of heat pump units; it is not a universal value. Optionally, the experimental fitting parameter includes the reference ambient temperature, reference compressor power, ambient temperature compensation coefficient, and compressor power compensation coefficient. The reference ambient temperature can be the core reference temperature determined in the experiment (e.g., 35℃), which is the benchmark for determining whether speed compensation is needed for the current ambient temperature. The reference compressor power can be the baseline operating power of the compressor determined in the experiment, serving as a benchmark for determining whether speed compensation is needed for the current compressor load. The ambient temperature compensation coefficient characterizes the impact of ambient temperature changes on fan speed; the greater the temperature deviation from the reference value, the greater the compensation magnitude for speed. The compressor power compensation coefficient characterizes the impact of compressor power changes on fan speed; the greater the power deviation from the reference value, the greater the compensation magnitude for speed. The real-time fan running time refers to the cumulative running time from the moment the fan starts. The compensated fan speed refers to the target operating speed of the fan obtained after multiple compensation calculations using experimentally fitted parameters, based on the initial fan speed and combined with the real-time value of the first environmental parameter.

[0025] In one embodiment, the initial fan speed is read from a locally preset unit parameter repository. First environmental parameters, such as the first temperature and first compressor power, are collected in real-time during the initial startup phase of the heat pump unit via its temperature sensor and compressor power detection module. Fixed parameters, pre-fitted through bench tests and operational condition tests, are also read from a local experimental parameter configuration repository. A compensated fan speed is calculated based on the acquired first environmental parameters, the initial fan speed, and the experimentally fitted parameters. For example, the formula for calculating the compensated fan speed is: Where Ncomp is the compensated fan speed (r / min), N0 is the initial fan speed (r / min), Kt is the ambient temperature compensation coefficient for the experimental fitting, tactual is the first temperature data / current ambient temperature (°C), tparameter is the reference ambient temperature for the experimental fitting (°C), Kp is the compressor power compensation coefficient for the experimental fitting, Pactual is the first compressor power / current compressor power (kW), Pparameter is the reference compressor power for the experimental fitting (kW), [.] 归 The values ​​within the parentheses are normalized and limited to a preset valid range; Nbase is a preset base compensation value (r / min, pre-calibrated by the unit). The normalization rule can be: if... Take 0.8; if Take the original value of the calculation; if Take 1.5.

[0026] S102. When the real-time running time of the fan is within the first preset time period, the fan speed is adjusted from the initial fan speed to the compensated fan speed.

[0027] The first preset duration stage can refer to the high-risk operation stage after the fan starts, which is pre-calibrated by the heat pump unit, for example, the first minute to the Pth minute of fan operation.

[0028] In one embodiment, when the real-time operating time of the fan is within a first preset duration period—that is, during a critical period when the condensing pressure is prone to excessively high and high-pressure faults are likely to occur after the unit restarts at high ambient temperatures—a digital control signal for speed adjustment, adapted to the communication protocol of the fan inverter control module, is generated. This signal is then sent to the fan inverter control module via the unit's hardware communication bus. After parsing the signal, the inverter control module automatically adjusts the power supply parameters output to the fan motor, driving the fan motor speed to adjust from the initial fan speed to the compensated fan speed, so that the actual operating speed reaches the compensated fan speed and remains stable for the preset duration. For example, if the first preset duration period is from minute 1 to minute P, then after the actual operating speed of the fan reaches the compensated fan speed within this preset duration period, the compensated fan speed is maintained for minute P.

[0029] S103. When the real-time running time of the fan is within the second preset time period, the second environmental parameters are acquired in real time, the normal fan speed is calculated based on the second environmental parameters, the initial fan speed and the compensation fan speed, and the fan speed is adjusted from the compensation fan speed to the normal fan speed. The second preset time period is after the first preset time period.

[0030] The second preset duration phase refers to the normal operation phase of the unit after the first preset duration phase ends. This is the stable operation phase after the unit has escaped the high-risk period of high-pressure faults and restarts due to high ambient temperature. It has no fixed duration limit until the unit shuts down or switches operating modes. The second environmental parameters refer to the full-dimensional operating data of the unit collected in real-time during the second preset duration phase of the fan operation, used to calculate the normal fan speed. Optionally, the second environmental parameters include second temperature data, second compressor power, and current condensing pressure. The second temperature data refers to the actual ambient temperature (usually in °C) around the unit, collected in real-time by a temperature sensor after the heat pump unit's fan operation enters the second preset duration phase. The second compressor power refers to the real-time operating power (usually in kW) of the compressor after the heat pump unit enters the second preset duration phase. The current condensing pressure refers to the real-time condensing pressure (usually in MPa / bar) of the heat pump unit's refrigeration system during the second preset duration phase. Normal fan speed can refer to the target operating speed of the fan, which is calculated based on the initial fan speed, with the compensated fan speed as a reference, and combined with the real-time second environmental parameters during the second preset time period, and is adapted to the dynamic operating conditions of the unit during the normal operation phase.

[0031] In one embodiment, after the fan's real-time operating time ends at the end of the first preset duration period, i.e., during the unit's normal operation phase, various sensors on the heat pump unit collect second environmental parameters in real time. These parameters include, but are not limited to, second temperature data, second compressor power, system pressure data, and condenser and evaporator operating status data. Based on the acquired second environmental parameters, the initial fan speed, and the compensated fan speed, the normal fan speed is calculated. For example, the formula for calculating the normal fan speed is: , where N 正 The normal fan speed (r / min) is defined as α and β, which are dynamic adjustment coefficients, and f is a correction function fitted based on the second environmental parameter. After calculating the normal fan speed, a speed adjustment signal adapted to the communication protocol of the fan inverter control module is generated and sent to the fan inverter control module via the hardware communication bus, driving the fan motor to smoothly transition from the compensated fan speed to the normal fan speed.

[0032] In this embodiment, by performing initial wind speed compensation based on current environmental parameters during the initial operation phase, the high wind speed required for heat exchange with the surrounding environment when the unit is restarted after a long period of shutdown is fully met, thus avoiding frequent high-pressure reports from the unit. By dynamically controlling the fan speed based on real-time environmental parameters after the high-risk restart phase, precise matching of system energy efficiency is achieved.

[0033] Optionally, the compensated fan speed is calculated based on the first environmental parameters, the initial fan speed, and the experimental fitting parameters, including: calculating the temperature compensation value based on the first temperature data, the reference ambient temperature, and the ambient temperature compensation coefficient; calculating the power compensation value based on the first compressor power, the reference compressor power, and the compressor power compensation coefficient; summing the temperature compensation value, the power compensation value, and the preset compensation parameters to obtain the compensation value; and calculating the product of the compensation value and the initial fan speed to obtain the compensated fan speed.

[0034] The temperature compensation value refers to the speed compensation quantification value calculated by multiplying the deviation between the first temperature data and the reference ambient temperature by the ambient temperature compensation coefficient. It reflects the additional speed adjustment required by the fan when the ambient temperature deviates from the baseline state, and is one component of the compensation value. It can be expressed as t. 补 The power compensation value can refer to the speed compensation quantification value calculated by multiplying the deviation between the power of the first compressor and the power of the reference compressor by the compressor power compensation coefficient. It reflects the additional speed adjustment required by the fan when the compressor load deviates from the reference state, and is one of the components of the compensation value. It can be expressed as P. 补 The compensation value can refer to the total speed compensation coefficient or quantified value obtained by summing the temperature compensation value, power compensation value, and preset compensation parameters. It comprehensively reflects the total compensation range of fan speed required by the combined factors of ambient temperature, compressor power deviation from the baseline state, and the basic heat exchange demand of the unit. The preset compensation parameters can refer to the fixed speed compensation values ​​calibrated in advance for the high ambient temperature start-up characteristics of the heat pump unit. These are basic compensation parameters set to adapt to the incremental heat exchange demand in the initial stage of the unit, such as 1.

[0035] In one embodiment, the formula for calculating the temperature compensation value is: , where K t Here, t represents the ambient temperature compensation coefficient, and t is the first temperature data. B The power compensation value is calculated using the ambient temperature as a reference. , where K P Here, P is the compressor power compensation coefficient, and P is the power of the first compressor. B The compensation value is calculated using the compressor power as a reference. Where "1" represents the preset compensation parameter. The formula for calculating the compensated fan speed is: Where N represents the calculation formula for the compensated fan speed, and N0 represents the initial fan speed.

[0036] In this embodiment, the calculation logic of independent compensation in different dimensions, comprehensive summation operation and calibration by product of reference speed can make the calculated compensated fan speed accurately match the heat exchange requirements of the heat pump unit in the initial stage of high ambient temperature start-up. This achieves scientific and accurate compensation of fan speed while taking into account the simplicity of the calculation logic and the stability of the unit operation.

[0037] Optionally, before obtaining the initial fan speed, the first environmental parameters, the experimental fitting parameters, and the real-time running time of the fan, the method further includes: calculating the initial fan speed based on the target air pressure, target air density, fan reference speed, measured air pressure corresponding to the fan reference speed, and experimental air density corresponding to the standard operating conditions; or, calculating the initial fan speed based on the target air volume, target air density, fan reference speed, measured air volume corresponding to the fan reference speed, and experimental air density corresponding to the standard operating conditions.

[0038] In this context, "standard operating condition" refers to the baseline operating environment and working state defined during the design and testing of the heat pump unit. "Target air pressure" refers to the minimum air pressure (unit: Pa) required for the heat pump unit's fan to overcome the total resistance of the air conditioning duct and achieve normal heat exchange under standard operating conditions. "Target air density" refers to the air density under standard operating conditions (unit: kg / m³). "Fan reference speed" refers to the rated speed provided by the fan manufacturer (e.g., 1500 r / min), or a fixed fan speed measured in an experiment (unit: r / min). "Measured air pressure corresponding to the fan reference speed" refers to the actual air pressure value (unit: Pa) obtained experimentally when the fan is stably operating at the fan reference speed in the experimental environment. "Experimental air density" refers to the actual air density (unit: kg / m³) under the experimental environment during fan performance testing. "Target air volume" refers to the baseline air volume (unit: m³ / h) required for the heat pump unit's fan to achieve normal heat exchange under standard operating conditions. The measured air volume corresponding to the fan reference speed refers to the actual air volume (unit: m³ / h) obtained by experimental measurement when the fan is running stably at the fan reference speed in an experimental environment.

[0039] In one embodiment, the initial fan speed can be calculated based on the target air pressure, target air density, fan reference speed, measured air pressure corresponding to the fan reference speed, and experimental air density under standard operating conditions; or it can be calculated based on the target air volume, target air density, fan reference speed, measured air volume corresponding to the fan reference speed, and experimental air density under standard operating conditions. For example, the formula for calculating the initial fan speed can be: , Where, N ref H0 is the reference speed of the fan (r / min), H0 is the target air pressure (Pa) corresponding to the standard operating condition, and ρ is the reference speed of the fan. refFor the experimental air density (kg / m³), H ref ρ0 represents the measured air pressure (Pa) corresponding to the fan reference speed, and ρ0 represents the target air density (kg / m³).

[0040] The formula for calculating the initial fan speed can also be: , Where, N ref The fan reference speed (r / min) is given, Q0 is the target air volume (m³ / h) corresponding to standard operating conditions, and ρ is the ρ value. ref Q is the experimental air density (kg / m³). ref ρ0 represents the measured air volume (m³ / h) corresponding to the fan reference speed, and ρ0 represents the target air density (kg / m³).

[0041] In this embodiment, by considering the influence of air density in the experimental environment and standard operating conditions on the initial fan speed, the calibration accuracy of the fan performance parameters is improved, ensuring that the initial fan speed at startup can accurately match the target air pressure or target air volume requirements under standard operating conditions in different air density environments. Consequently, the adaptability and accuracy of the entire fan speed control method are improved.

[0042] Figure 2 This is a flowchart of a fan speed adjustment method provided in an embodiment of this application, such as... Figure 2 As shown, it includes: S1021. Calculate the speed difference between the initial fan speed and the compensation fan speed, and calculate the step adjustment range based on the speed difference and the preset adjustment time interval.

[0043] S1022. The fan speed is adjusted stepwise from the initial fan speed based on the step adjustment range until the compensated fan speed is reached.

[0044] The speed difference refers to the numerical difference between the initial fan speed and the compensation fan speed, which is a core parameter for quantifying the total adjustment range required for the fan to move from the current reference speed to the target compensation speed. The step adjustment range refers to the single-step speed change value of the fan in each step adjustment, calculated by taking the speed difference as the total adjustment amount and combining it with a preset adjustment time interval.

[0045] In one embodiment, firstly, the difference between the compensated fan speed and the initial fan speed is calculated to obtain the speed difference. Then, according to a preset adjustment time interval, the speed difference is segmented to calculate the step adjustment range for each adjustment. Based on the calculated step adjustment range, the fan control system gradually adjusts the fan speed at predetermined time intervals. After each adjustment, the system monitors the actual operating speed of the current fan in real time and compares it with the target compensated fan speed. If the actual speed has not yet reached the target value, the next round of step adjustment continues until the fan speed perfectly matches the compensated fan speed. In one possible embodiment, the dynamic characteristics of the fan operation and changes in external environmental parameters can also be considered during the step adjustment process. For example, when a first environmental parameter fluctuates significantly, the system can dynamically adjust the step adjustment range or time interval.

[0046] In this embodiment, by adjusting the fan speed from the initial fan speed in steps based on the step adjustment range, it is possible to ensure that the change in fan speed can be completed smoothly and controllably within a specified time, avoiding the impact of sudden speed changes on the stability of unit operation. While ensuring the accuracy of fan speed adjustment, it also enhances the adaptability of the heat pump unit under high ambient temperature conditions.

[0047] Figure 3 This is a flowchart of a method for determining the normal fan speed provided in an embodiment of this application, such as... Figure 3 As shown, it includes: S1031. Calculate the ambient temperature correction coefficient based on the second temperature data, the preset standard temperature data, and the preset temperature verification parameters; determine the condensing pressure correction coefficient based on the current condensing pressure and the preset standard condensing pressure; and calculate the compressor load correction coefficient based on the second compressor power and the preset rated power.

[0048] S1032. Determine the normal fan speed based on the initial fan speed, the compensated fan speed, the temperature correction factor, the condensing pressure correction factor, and the compressor load correction factor.

[0049] The preset standard temperature data can refer to the pre-calibrated ambient temperature benchmark value during the normal operation of the heat pump unit, or it can be determined by experimental fitting and the requirements of the unit's normal heat exchange conditions. The preset temperature calibration parameter can be a fixed coefficient calibrated experimentally, without specific dimensions, used to quantify the impact of the deviation of the second temperature data from the preset standard temperature data on the fan speed. The ambient temperature correction coefficient can be a coefficient value calculated based on the second temperature data and the preset standard temperature data, combined with the preset temperature calibration parameter, used to characterize the proportion by which the fan speed needs to be adjusted when the real-time ambient temperature deviates from the benchmark temperature during the normal operation of the unit. The preset standard condensing pressure can refer to the pre-calibrated condensing pressure benchmark value of the refrigeration system during the normal operation of the heat pump unit, reflecting the optimal condensing pressure state under normal operating conditions, and can be determined by experimental fitting and system safety operation requirements. The condensing pressure correction coefficient can be a coefficient value determined based on the deviation between the current condensing pressure and the preset standard condensing pressure, used to characterize the proportion by which the fan speed needs to be adjusted when the real-time condensing pressure of the refrigeration system deviates from the benchmark pressure. The preset rated power can be the rated operating power of the heat pump unit's compressor, which is the reference power value designed and calibrated for the compressor. It can reflect the power status of the compressor under full load or normal rated operating conditions. The compressor load correction factor can be a coefficient value calculated based on the ratio of the second compressor power to the preset rated power. It is used to characterize the degree to which the real-time load of the compressor deviates from the rated load during the normal operation phase of the unit, as well as the proportion of the demand for fan speed due to this load change.

[0050] In one embodiment, the formula for calculating the ambient temperature correction factor can be: , Among them, K t α is the ambient temperature correction factor, t2 is the preset temperature calibration parameter, t2 is the second temperature data, and t is the preset standard temperature data.

[0051] The formula for calculating the compressor load correction factor is: , Where P2 is the power of the second compressor, P 额 This is the preset rated power.

[0052] The formula for calculating the condensing pressure correction factor is as follows: , Among them, K p P is the condensation pressure correction factor. std To preset the standard condensation pressure, P curr This represents the current condensation pressure.

[0053] The formula for calculating the normal fan speed is: , Where N0 is the initial fan speed, N 补 To compensate for the fan speed.

[0054] In this embodiment, by independently calculating the temperature correction coefficient, condensing pressure correction coefficient, and compressor load correction coefficient based on the second temperature data and the preset standard temperature data, the current condensing pressure and the preset standard condensing pressure, and the second compressor power and the preset rated power, the actual impact of ambient temperature, condensing pressure, and compressor load on the fan's operating status can be accurately quantified. Combined with the initial fan speed and the compensated fan speed, the normal fan speed is obtained through multi-coefficient joint correction, realizing adaptive, multi-dimensional, and refined adjustment of the fan speed. This allows the fan speed to match the current operating condition changes in real time, effectively improving the system's operational stability and control accuracy.

[0055] Optionally, the normal fan speed is determined based on the initial fan speed, the compensated fan speed, the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient. This includes: calculating the product of the initial fan speed and the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient to obtain the target fan speed; calculating the speed difference between the target fan speed and the compensated fan speed, and determining the fine-tuning compensation value corresponding to the speed difference according to a preset control strategy; and correcting the target fan speed based on the fine-tuning compensation value to obtain the normal fan speed.

[0056] The target fan speed can be defined as the theoretical fan speed obtained by multiplying the initial fan speed by three correction coefficients: temperature, condensing pressure, and compressor load. The preset control strategy defines the mapping relationship between the pre-set speed difference and the fine-tuning compensation value. The fine-tuning compensation value refers to the speed adjustment amount calculated based on the speed difference and the preset control strategy.

[0057] In one embodiment, the formula for calculating the target fan speed is: Where N0 is the initial fan speed, K t K is the temperature correction factor. p K is the correction factor for condensing pressure. c This is the compressor load correction factor. The formula for calculating the speed difference is: The fine-tuning compensation value corresponding to the speed difference is determined based on the pre-set mapping relationship between the speed difference and the fine-tuning compensation value. The target fan speed and the fine-tuning compensation value are summed to obtain the normal fan speed.

[0058] In this embodiment, based on multi-dimensional operating condition correction and fine-tuning of speed difference, the fan speed can be accurately adapted to the real-time operating conditions of the heat pump unit in the second preset time period, ensuring the stability of the speed adjustment process.

[0059] Figure 4 This is a schematic diagram of the structure of a fan speed control device provided in an embodiment of this application, as shown below. Figure 4 As shown, it includes: Data acquisition module 21 is used to acquire initial fan speed, first environmental parameters, experimental fitting parameters and real-time fan running time; The compensating fan speed calculation module 22 is used to calculate the compensating fan speed based on the first environmental parameters, the initial fan speed and the experimental fitting parameters; The first speed adjustment module 23 is used to adjust the speed of the fan from the initial fan speed to the compensated fan speed when the real-time running time of the fan is within a first preset time period. The normal fan speed determination module 24 is used to acquire the second environmental parameter in real time when the real-time running time of the fan is within the second preset time period, and calculate the normal fan speed based on the second environmental parameter, the initial fan speed and the compensation fan speed. The second speed adjustment module 25 is used to adjust the speed of the fan from the compensated fan speed to the normal fan speed, and the second preset time period is after the first preset time period.

[0060] In this embodiment, by performing initial wind speed compensation based on current environmental parameters during the initial operation phase, the high wind speed required for heat exchange with the surrounding environment when the unit is restarted after a long period of shutdown is fully met, thus avoiding frequent high-pressure reports from the unit. By dynamically controlling the fan speed based on real-time environmental parameters after the high-risk restart phase, precise matching of system energy efficiency is achieved.

[0061] In one possible embodiment, the first environmental parameter includes: first temperature data and first compressor power, and the experimental fitting parameter includes: reference ambient temperature, reference compressor power, ambient temperature compensation coefficient, and compressor power compensation coefficient.

[0062] In one possible embodiment, the compensating fan speed calculation module 22 is specifically used for: The temperature compensation value is calculated based on the first temperature data, the reference ambient temperature, and the ambient temperature compensation coefficient; the power compensation value is calculated based on the first compressor power, the reference compressor power, and the compressor power compensation coefficient. The temperature compensation value, the power compensation value, and the preset compensation parameter are summed to obtain the compensation value. The product of the compensation value and the initial fan speed is calculated to obtain the compensated fan speed.

[0063] In one possible embodiment, the first speed adjustment module 23 is specifically used for: Calculate the speed difference between the initial fan speed and the compensation fan speed, and calculate the step adjustment range based on the speed difference and the preset adjustment time interval; Based on the aforementioned step adjustment range, the fan speed is adjusted stepwise from the initial fan speed until the compensated fan speed is reached.

[0064] In one possible embodiment, the second environmental parameter includes: second temperature data, second compressor power, and current condensing pressure; Correspondingly, the normal fan speed determination module 24 is specifically used for: The ambient temperature correction coefficient is calculated based on the second temperature data, the preset standard temperature data, and the preset temperature verification parameters. The condensing pressure correction coefficient is determined based on the deviation between the current condensing pressure and the preset standard condensing pressure. The compressor load correction coefficient is calculated based on the second compressor power and the preset rated power. The normal fan speed is determined based on the initial fan speed, the compensated fan speed, the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient.

[0065] In one possible embodiment, the normal fan speed determination module 24 is specifically used for: The target fan speed is obtained by multiplying the initial fan speed by the temperature correction factor, the condensing pressure correction factor, and the compressor load correction factor. Calculate the speed difference between the target fan speed and the compensation fan speed, and determine the fine-tuning compensation value corresponding to the speed difference according to the preset control strategy; The target fan speed is corrected based on the fine-tuning compensation value to obtain the normal fan speed.

[0066] In one possible embodiment, an initial fan speed calculation module is also included, which is used for: The initial fan speed is calculated based on the target air pressure, target air density, fan reference speed, measured air pressure corresponding to the fan reference speed, and experimental air density under standard operating conditions; or... The initial fan speed is calculated based on the target air volume, target air density, fan reference speed, measured air volume corresponding to the fan reference speed, and experimental air density under standard operating conditions.

[0067] This application also provides an electronic device that can integrate a fan speed control system provided in this application. Figure 5 This is a schematic diagram of the structure of a fan speed control device provided in an embodiment of this application, with reference to... Figure 5The fan speed control device includes: an input device 33, an output device 34, a memory 32, and one or more processors 31; the memory 32 is used to store one or more programs; when one or more programs are executed by one or more processors 31, the one or more processors 31 implement the fan speed control method provided in the above embodiments. The input device 33, output device 34, memory 32, and processors 31 can be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0068] The memory 32, as a computing device readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the fan speed control method provided in any embodiment of this application. The memory 32 may primarily include a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a function; the data storage area may store data created based on the use of the device. Furthermore, the memory 32 may include high-speed random access memory and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 32 may further include memory remotely located relative to the processor 31, and these remote memories can be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0069] Input device 33 can be used to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the device. Output device 34 may include display devices such as a display screen.

[0070] The processor 31 executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory 32, thereby realizing the above-mentioned fan speed control method.

[0071] The wind turbine speed control device, equipment, and computer provided above can be used to execute the wind turbine speed control method provided in any of the above embodiments, and have corresponding functions and beneficial effects.

[0072] This application embodiment also provides a storage medium for storing computer-executable instructions. When executed by a computer processor, the computer-executable instructions are used to execute the fan speed control method provided in the above embodiment. The fan speed control method includes: acquiring an initial fan speed, a first environmental parameter, an experimental fitting parameter, and a real-time running time of the fan; calculating a compensated fan speed based on the first environmental parameter, the initial fan speed, and the experimental fitting parameter; adjusting the fan speed from the initial fan speed to the compensated fan speed when the real-time running time of the fan is within a first preset time period; and acquiring a second environmental parameter in real time when the real-time running time of the fan is within a second preset time period, calculating a normal fan speed based on the second environmental parameter, the initial fan speed, and the compensated fan speed, and adjusting the fan speed from the compensated fan speed to the normal fan speed. The second preset time period is after the first preset time period.

[0073] Storage medium – any type of memory device or storage device. The term “storage medium” is intended to include: mounting media, such as CD-ROMs, floppy disks, or magnetic tape devices; computer system memory or random access memory, such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-volatile memory, such as flash memory, magnetic media (e.g., hard disks or optical storage); registers or other similar types of memory elements, etc. Storage media may also include other types of memory or combinations thereof. Furthermore, storage media may reside in a first computer system in which a program is executed, or may reside in a different second computer system connected to the first computer system via a network (such as the Internet). The second computer system can provide program instructions to the first computer for execution. The term “storage medium” can include two or more storage media that may reside in different locations (e.g., in different computer systems connected via a network). Storage media may store program instructions (e.g., specifically implemented as a computer program) executable by one or more processors.

[0074] Of course, the computer-executable instructions provided in the embodiments of this application are not limited to the fan speed control method described above, but can also execute related operations in the fan speed control method provided in any embodiment of this application.

[0075] The fan speed control device, equipment, and storage medium provided in the above embodiments can execute the fan speed control method provided in any embodiment of this application. For technical details not described in detail in the above embodiments, please refer to the fan speed control method provided in any embodiment of this application.

[0076] The above description is merely a preferred embodiment and the technical principles employed in this application. This application is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions that can be made by those skilled in the art will not depart 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 more other equivalent embodiments without departing from the concept of this application, the scope of which is determined by the scope of the claims.

Claims

1. A method for controlling the speed of a fan, characterized in that, include: The initial fan speed, first environmental parameters, experimental fitting parameters, and real-time fan runtime are obtained. The compensated fan speed is calculated based on the first environmental parameters, the initial fan speed, and the experimental fitting parameters. If the real-time operating time of the fan is within a first preset time period, the fan speed is adjusted from the initial fan speed to the compensated fan speed. When the real-time operating time of the fan is within the second preset duration period, the second environmental parameter is acquired in real time, and the normal fan speed is calculated based on the second environmental parameter, the initial fan speed and the compensation fan speed. The fan speed is then adjusted from the compensation fan speed to the normal fan speed. The second preset duration period is after the first preset duration period.

2. The fan speed control method according to claim 1, characterized in that, The first environmental parameters include: first temperature data and first compressor power, and the experimental fitting parameters include: reference ambient temperature, reference compressor power, ambient temperature compensation coefficient, and compressor power compensation coefficient.

3. The fan speed control method according to claim 2, characterized in that, The calculation of the compensated fan speed based on the first environmental parameter, the initial fan speed, and the experimental fitting parameter includes: The temperature compensation value is calculated based on the first temperature data, the reference ambient temperature, and the ambient temperature compensation coefficient; the power compensation value is calculated based on the first compressor power, the reference compressor power, and the compressor power compensation coefficient. The temperature compensation value, the power compensation value, and the preset compensation parameter are summed to obtain the compensation value. The product of the compensation value and the initial fan speed is calculated to obtain the compensated fan speed.

4. The fan speed control method according to claim 1, characterized in that, The step of adjusting the fan speed from the initial fan speed to the compensated fan speed includes: Calculate the speed difference between the initial fan speed and the compensation fan speed, and calculate the step adjustment range based on the speed difference and the preset adjustment time interval; Based on the aforementioned step adjustment range, the fan speed is adjusted stepwise from the initial fan speed until the compensated fan speed is reached.

5. The fan speed control method according to claim 1, characterized in that, The second environmental parameters include: second temperature data, second compressor power, and current condensing pressure; Accordingly, the calculation of the normal fan speed based on the second environmental parameter, the initial fan speed, and the compensated fan speed includes: The ambient temperature correction factor is calculated based on the second temperature data, the preset standard temperature data, and the preset temperature verification parameters. The condensing pressure correction factor is determined based on the current condensing pressure and the preset standard condensing pressure. The compressor load correction factor is calculated based on the second compressor power and the preset rated power. The normal fan speed is determined based on the initial fan speed, the compensated fan speed, the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient.

6. The fan speed control method according to claim 5, characterized in that, The step of determining the normal fan speed based on the initial fan speed, the compensated fan speed, the temperature correction coefficient, the condensing pressure correction coefficient, and the compressor load correction coefficient includes: The target fan speed is obtained by multiplying the initial fan speed by the temperature correction factor, the condensing pressure correction factor, and the compressor load correction factor. Calculate the speed difference between the target fan speed and the compensation fan speed, and determine the fine-tuning compensation value corresponding to the speed difference according to the preset control strategy; The target fan speed is corrected based on the fine-tuning compensation value to obtain the normal fan speed.

7. The fan speed control method according to claim 1, characterized in that, Before obtaining the initial fan speed, first environmental parameters, experimental fitting parameters, and real-time fan runtime, the method further includes: The initial fan speed is calculated based on the target air pressure, target air density, fan reference speed, measured air pressure corresponding to the fan reference speed, and experimental air density under standard operating conditions; or... The initial fan speed is calculated based on the target air volume, target air density, fan reference speed, measured air volume corresponding to the fan reference speed, and experimental air density under standard operating conditions.

8. A fan speed control device, characterized in that, include: The data acquisition module is used to acquire the initial fan speed, first environmental parameters, experimental fitting parameters, and real-time running time of the fan; The compensated fan speed calculation module is used to calculate the compensated fan speed based on the first environmental parameters, the initial fan speed and the experimental fitting parameters; The first speed adjustment module is used to adjust the speed of the fan from the initial fan speed to the compensated fan speed when the real-time running time of the fan is within a first preset time period. The normal fan speed determination module is used to acquire a second environmental parameter in real time when the real-time running time of the fan is within a second preset time period, and calculate the normal fan speed based on the second environmental parameter, the initial fan speed and the compensation fan speed. The second speed adjustment module is used to adjust the speed of the fan from the compensated fan speed to the normal fan speed, and the second preset time period is after the first preset time period.

9. An electronic device, characterized in that, The device includes: one or more processors; and a storage device for storing one or more programs, which, when executed by the one or more processors, cause the one or more processors to implement the fan speed control method as described in any one of claims 1-7.

10. A storage medium for storing computer-executable instructions, characterized in that, The computer-executable instructions, when executed by a computer processor, are used to perform the wind turbine speed control method as described in any one of claims 1-7.

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