A control method and related device for a single-crystal plant combined air conditioning unit

Abstract

This application provides a control method and related apparatus for a combined air conditioning unit in a monocrystalline silicon workshop, relating to the field of industrial automation control technology. The method includes: acquiring the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline silicon workshop, and the baseline environmental parameters of the monocrystalline process; correcting the baseline environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain target environmental parameters; using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performing deviation calculations through a proportional-integral-derivative algorithm to adjust the air supply volume of the combined air conditioning unit; and performing coordinated control of start-up, shutdown, and interlocking protection on the combined air conditioning unit based on the air supply volume adjustment results and the equipment operating parameters. Through this organic combination of multi-dimensional linkage, dynamic correction, frequency conversion regulation, and safety interlocking, not only is the environmental fluctuation risk during the monocrystalline silicon pulling process significantly reduced and the product yield improved, but the cost of manual intervention and equipment energy consumption are also greatly reduced.

Description

Technical Field

[0001] This application relates to the field of industrial automation control technology, and in particular to a control method and related device for a single-crystal workshop combined air conditioning unit. Background Technology

[0002] Monocrystalline silicon growth is a core precision manufacturing process in the photovoltaic and semiconductor industry chain. The temperature, humidity, cleanliness, and airflow stability of the monocrystalline silicon workshop directly determine the growth quality and yield of the monocrystalline silicon rods. As a key piece of equipment for maintaining a constant workshop environment, the combined air conditioning unit plays a crucial role in regulating air temperature and humidity and delivering clean air.

[0003] Existing air conditioning control systems in monocrystalline silicon production workshops typically employ a local manual control mode, relying on on-site observation by operators or monitoring data from the central control room to manually set a fixed target. However, this reliance on human experience and manual operation results in a significant lag in response to environmental changes, making it difficult to match the dynamic, high-precision environmental requirements of monocrystalline silicon production processes in real time. When production load changes or external environmental disturbances occur, manual adjustments cannot achieve immediate and accurate convergence, easily causing the workshop environment to deviate from the manually set target for extended periods. This can easily lead to defects in monocrystalline silicon pulling and a decrease in yield. Summary of the Invention

[0004] In view of the above problems, this application provides a control method and related device for a monocrystalline workshop combined air conditioning unit to achieve the purpose of automated control and interlocking protection of the monocrystalline workshop combined air conditioning unit. The specific solution is as follows:

[0005] The first aspect of this application provides a control method for a combined air conditioning unit in a monocrystalline workshop, the control method comprising:

[0006] Obtain the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the baseline environmental parameters of the monocrystalline process;

[0007] The target environmental parameters are obtained by correcting the baseline environmental parameters with the equipment operating parameters and the measured environmental parameters. The deviation is calculated by using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, and the air volume of the combined air conditioning unit is adjusted by using a proportional-integral-derivative algorithm.

[0008] Based on the air volume adjustment results and the equipment operating parameters, the combined air conditioning unit is subjected to coordinated control of start-up, shutdown, and interlocking protection.

[0009] In one possible implementation, the equipment operating parameters include the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans; the measured environmental parameters include indoor ambient temperature and outdoor ambient temperature; and the reference environmental parameters include a reference ambient temperature.

[0010] The process of correcting the baseline environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and then using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performs deviation calculations using a proportional-integral-differential algorithm, including:

[0011] An environmental deviation correction term is determined based on the indoor ambient temperature, the outdoor ambient temperature, and the reference ambient temperature.

[0012] The equipment load correction item is determined based on the number of operating air conditioners, the total number of air conditioners, and the average frequency of the fans.

[0013] The target ambient temperature is obtained by correcting the reference ambient temperature using the environmental deviation correction term and the equipment load correction term.

[0014] Using the indoor ambient temperature as the feedback value and the target ambient temperature as the target value, the deviation is calculated using a proportional-integral-differential algorithm.

[0015] In one possible implementation, the step of correcting the reference environmental parameters with the device operating parameters and the measured environmental parameters to obtain the target environmental parameters, and using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performing deviation calculations through a proportional-integral-differential algorithm, further includes:

[0016] Obtain the allowable temperature deviation for the single crystal process, and determine the allowable range of the reference ambient temperature based on the allowable temperature deviation and the reference ambient temperature;

[0017] The target ambient temperature is constrained by limiting the range of the baseline ambient temperature.

[0018] In one possible implementation, the equipment operating parameters include the equipment self-test status, and the coordinated control of start-up, shutdown, and interlocking protection of the combined air conditioning unit based on the air volume adjustment results and the equipment operating parameters includes:

[0019] Determine whether the device's self-test status meets the preset interlocking protection conditions;

[0020] If the self-test status of the equipment meets the interlock protection conditions, the combined air conditioning unit is triggered to stop and an early warning is issued;

[0021] If the self-test status of the equipment does not meet the interlock protection conditions, determine whether the air volume adjustment result meets the preset shutdown conditions;

[0022] If the air supply volume condition result meets the shutdown condition, control the combined air conditioning unit to shut down;

[0023] If the air supply volume condition result does not meet the shutdown condition, the combined air conditioning unit is controlled to start according to the air supply volume adjustment result.

[0024] In one possible implementation, the interlock protection conditions include at least one of: local manual mode, fan inverter overload, and filter differential pressure exceeding the limit.

[0025] A second aspect of this application provides a control device for a combined air conditioning unit in a monocrystalline workshop, the control device comprising:

[0026] The parameter acquisition module is used to acquire the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the reference environmental parameters of the monocrystalline process.

[0027] The collaborative control module is used to correct the reference environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and to perform deviation calculation using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, thereby adjusting the air supply volume of the combined air conditioning unit through a proportional-integral-derivative algorithm; based on the air supply volume adjustment results and the equipment operating parameters, it performs collaborative control of start-up, shutdown and interlocking protection on the combined air conditioning unit.

[0028] In one possible implementation, the equipment operating parameters include the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans; the measured environmental parameters include indoor ambient temperature and outdoor ambient temperature; and the reference environmental parameters include a reference ambient temperature.

[0029] The collaborative control module, used to correct the reference environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performs deviation calculations using a proportional-integral-derivative algorithm, specifically is used for:

[0030] An environmental deviation correction term is determined based on the indoor ambient temperature, the outdoor ambient temperature, and the reference ambient temperature; an equipment load correction term is determined based on the number of operating air conditioners, the total number of air conditioners, and the average frequency of the fans; the reference ambient temperature is corrected using the environmental deviation correction term and the equipment load correction term to obtain the target ambient temperature; the deviation is calculated using a proportional-integral-differential algorithm with the indoor ambient temperature as the feedback value and the target ambient temperature as the target value.

[0031] A third aspect of this application provides a computer program product, including computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the single-crystal workshop combined air conditioning unit control method described in the first aspect or any implementation thereof.

[0032] A fourth aspect of this application provides an electronic device, including at least one processor and a memory connected to the processor, wherein:

[0033] The memory is used to store computer programs;

[0034] The processor is used to execute the computer program so that the electronic device can implement the single-crystal workshop combined air conditioning unit control method of the first aspect or any implementation thereof.

[0035] The fifth aspect of this application provides a computer storage medium carrying one or more computer programs, which, when executed by an electronic device, enable the electronic device to implement the single-crystal workshop combined air conditioning unit control method described in the first aspect or any implementation thereof.

[0036] Using the above technical solution, this application provides a control method and related apparatus for a combined air conditioning unit in a monocrystalline workshop, comprising: acquiring the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the reference environmental parameters of the monocrystalline process; correcting the reference environmental parameters with the equipment operating parameters and the measured environmental parameters to obtain target environmental parameters, and using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performing deviation calculations through a proportional-integral-derivative algorithm to adjust the air supply volume of the combined air conditioning unit; and performing coordinated control of start-up, shutdown, and interlocking protection on the combined air conditioning unit based on the air supply volume adjustment results and the equipment operating parameters. This application introduces equipment operating parameters and measured environmental parameters to correct the baseline environmental parameters in real time, enabling the target environmental parameters to adapt to equipment operating status and environmental changes. In addition, by using a proportional-integral-derivative algorithm to directly drive the air volume adjustment, rapid convergence and high-precision constantness of environmental parameters can be achieved. Furthermore, by integrating the adjustment results with equipment operating parameters to execute start-stop and interlock protection decisions, it ensures that the equipment operates only under necessary conditions and is protected immediately under abnormal conditions. This improves the stability, reliability, and energy efficiency of the environmental control in the monocrystalline workshop, ensuring the high-precision requirements of the monocrystalline pulling process. Attached Figure Description

[0037] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0038] Figure 1 A flowchart illustrating a control method for a monocrystalline workshop combined air conditioning unit provided in an embodiment of this application;

[0039] Figure 2 This is a partial flowchart illustrating a control method for a monocrystalline workshop combined air conditioning unit provided in an embodiment of this application.

[0040] Figure 3 This is another schematic flowchart of a control method for a monocrystalline workshop combined air conditioning unit provided in an embodiment of this application;

[0041] Figure 4 A schematic diagram of the structure of a combined air conditioning unit control device for a single-crystal workshop provided in this application embodiment;

[0042] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0043] The embodiments of this application are described below with reference to the accompanying drawings. The terminology used in the implementation section of this application is for explaining specific embodiments only and is not intended to limit the scope of this application.

[0044] The embodiments of this application will now be described with reference to the accompanying drawings. Those skilled in the art will recognize that, with technological advancements and the emergence of new scenarios, the technical solutions provided in the embodiments of this application are equally applicable to similar technical problems.

[0045] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms are interchangeable where appropriate; this is merely a way of distinguishing objects with the same attributes in the embodiments of this application. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion, so that a process, method, system, product, or apparatus that comprises a series of elements is not necessarily limited to those elements, but may include other elements not explicitly listed or inherent to those processes, methods, products, or apparatuses.

[0046] To address the significant lag in the response of traditional control schemes to environmental changes caused by manually set targets, and the inability to achieve timely and accurate convergence when production load changes or external environmental disturbances occur, this application provides a control method for a combined air conditioning unit in a monocrystalline workshop. Through the organic integration of dynamic parameter generation, variable frequency closed-loop regulation, and safety-coordinated control, a complete and logically rigorous automated temperature control system is formed. This not only achieves a technological leap from passive response to active adaptation but also unifies high-precision temperature control with energy-saving and safe operation at the system level, significantly improving the overall protection capability of the monocrystalline production environment. The control method for the combined air conditioning unit in a monocrystalline workshop according to this application will be described in detail below with reference to the accompanying drawings.

[0047] See Figure 1 , Figure 1 This is a flowchart illustrating a control method for a monocrystalline workshop combined air conditioning unit provided in an embodiment of this application. Figure 1 As shown in the embodiment of this application, a control method for a single-crystal workshop combined air conditioning unit is provided. It is applied to a distributed control system (DCS) and may include steps S101 to S103. These steps are described in detail below.

[0048] S101, acquire the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the reference environmental parameters of the monocrystalline process.

[0049] In this embodiment, the equipment operating parameters characterize the current working status of the combined air conditioning unit, including the number of operating air conditioners, the total number of air conditioners, the average frequency of the fans, and the equipment self-test status. These parameters can be collected in real time through feedback signals from the unit control cabinet and frequency converter. The measured environmental parameters characterize the internal and external environmental conditions of the monocrystalline silicon workshop, including indoor temperature and humidity, outdoor temperature and humidity. These parameters can be collected in real time through temperature and humidity sensors in key areas of the workshop and outdoors, serving as a feedback benchmark for closed-loop control. The benchmark environmental parameters characterize the standard environmental indicators specified by the monocrystalline silicon production process, including benchmark temperature and humidity. These parameters are typically preset and issued by the process department according to the specific stage of monocrystalline silicon pulling.

[0050] This application embodiment obtains parameters from multiple dimensions, providing a complete data foundation for subsequent dynamic correction, and ensuring that the control strategy can fully perceive equipment load and environmental changes.

[0051] S102, the reference environmental parameters are corrected by the equipment operating parameters and measured environmental parameters to obtain the target environmental parameters, and the deviation is calculated by using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, in order to adjust the air supply volume of the combined air conditioning unit.

[0052] In this embodiment, the equipment operating parameters and measured environmental parameters are used as the current operating conditions. The target environmental parameters are obtained by correcting the baseline environmental parameters through multivariate coupled computational logic, enabling the target environmental parameters to adapt to the current operating conditions. Furthermore, a proportional-integral-derivative (PID) algorithm is applied to perform deviation calculations. Based on the difference between the target environmental parameters and the measured environmental parameters, the adjustment output is automatically calculated. Specifically, using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, the deviation is calculated in real time. A control signal is output through a linear combination of the proportional, integral, and derivative components. This control signal directly acts on the fan inverter to adjust the air volume of the combined air conditioning unit. This dual-layer closed-loop mechanism of dynamic target value generation and PID variable frequency regulation eliminates the thermal inertia of media transmission and achieves second-level response.

[0053] This application embodiment deeply integrates equipment operating parameters with measured environmental parameters, realizing real-time adaptive updates of target values. It effectively solves the problem that fixed parameters cannot match dynamic production conditions, significantly improving temperature control accuracy to within ±0.5℃. At the same time, frequency conversion adjustment avoids sudden changes in airflow, ensuring the stability of the monocrystalline production environment.

[0054] In one possible implementation, the temperature in the single-crystal workshop is a key factor affecting the quality of single-crystal pulling. An environmental deviation correction term is calculated using indoor ambient temperature, outdoor ambient temperature, and a reference ambient temperature. Simultaneously, an equipment load correction term is calculated using the number of operating air conditioners, the total number of air conditioners, and the average fan frequency. These two correction values ​​are then used to adjust the reference ambient temperature to obtain the real-time target ambient temperature. For example, when the outdoor ambient temperature is significantly higher than the standard value by 20°C and the indoor ambient temperature is higher than the reference ambient temperature, the environmental deviation correction term will generate a positive increment. Conversely, when the proportion of operating air conditioners to the total number of air conditioners is high, and the average fan frequency is high, it indicates a high workshop heat load, and the equipment load correction term will participate in the calculation to prevent the target value from being set too low, which could lead to equipment overload or vibration. Furthermore, PID variable frequency control is performed using the indoor ambient temperature as the feedback value and the target ambient temperature as the target value.

[0055] See Figure 2 , Figure 2 This is a partial flowchart illustrating a control method for a monocrystalline workshop combined air conditioning unit provided in an embodiment of this application. Figure 2 As shown in the embodiment of this application, a control method for a single-crystal workshop combined air conditioning unit is provided. The equipment operating parameters include the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans. The measured environmental parameters include the indoor ambient temperature and the outdoor ambient temperature. The reference environmental parameters include the reference ambient temperature. In step S102, "the reference environmental parameters are corrected with the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and the deviation is calculated using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values ​​through a proportional-integral-differential algorithm", which may include steps S201 to S204. These steps are described in detail below.

[0056] S201, determine the environmental deviation correction item based on the indoor ambient temperature, outdoor ambient temperature and reference ambient temperature.

[0057] In this embodiment, the indoor ambient temperature is the air temperature collected by temperature and humidity sensors deployed in the key production area of ​​the single crystal workshop, which can characterize the current actual thermal environment status of the workshop; the outdoor ambient temperature is the external atmospheric temperature obtained by temperature sensors deployed at the fresh air inlet of the air conditioning unit or the outdoor weather station, which can characterize the potential impact of the external environment on the heat load of the workshop; the reference ambient temperature is the ideal temperature preset according to the single crystal pulling process standard, which is usually set by the process department according to the product specifications.

[0058] An environmental correction term is obtained by weighted coupling calculation of the difference between indoor ambient temperature and reference ambient temperature, and the difference between indoor ambient temperature and standard reference temperature. This term is used to quantify the degree of deviation of the current environmental state from the ideal working condition and the disturbance trend caused by external temperature fluctuations. Specifically, the environmental deviation correction term can be calculated according to the following formula (1):

[0059] ΔT=(T1-T2)×A+(T3-T4)×B (1);

[0060] Where ΔT represents the environmental deviation correction term; T1 represents the indoor ambient temperature; T2 represents the baseline ambient temperature; T3 represents the outdoor ambient temperature; T4 represents the standard reference temperature (e.g., 20℃); A and B represent the preset weighting coefficients, for example, A=0.5 and B=0.2.

[0061] In other words, the first difference between the indoor ambient temperature and the reference ambient temperature reflects the current temperature control error inside the workshop, while the second difference between the outdoor ambient temperature and the standard reference temperature reflects the thermal disturbance of the external climate on the workshop. The environmental deviation correction term is obtained by weighted summation of the first and second differences. This calculation method, which incorporates outdoor temperature feedforward compensation, allows for the early detection and calculation of corrections before significant drift in indoor temperature is caused by drastic changes in outdoor temperature. This enables predictive adjustment of temperature fluctuations and effectively solves the problem that traditional manually set targets cannot adapt to all-weather environmental changes.

[0062] S202, determine the equipment load correction item based on the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans.

[0063] In this embodiment, the number of operating air conditioners is the number of combined air conditioning units currently in operation; the total number of air conditioners is the total number of combined air conditioning units configured in the monocrystalline workshop; and the average fan frequency is the average value of the current output frequency of the fan inverters of all operating combined air conditioning units, which can characterize the fan speed level.

[0064] Based on the proportion of operating air conditioners to the total number of air conditioners, and combined with the ratio of the average frequency of the fans to the rated frequency, a weighted calculation can be performed to obtain the equipment load correction term. This equipment load correction term can characterize the degree of matching between the overall service capacity of the current air conditioning system and the actual load level. Specifically, the equipment load correction term can be calculated according to the following formula (2):

[0065] ΔL=(N1÷N2)×(F1÷F2)×C (2);

[0066] Where ΔL represents the equipment load correction term; N1 represents the number of air conditioners in operation; N2 represents the total number of air conditioners; F1 represents the average frequency of the fan; F2 represents the rated frequency, usually 50Hz; and C represents the preset weighting coefficient, for example, C=0.1.

[0067] In other words, the first ratio of the number of operating air conditioners to the total number of air conditioners represents the equipment availability rate, and the second ratio of the average fan frequency to the rated fan frequency represents the fan load rate. The equipment load correction term is obtained by multiplying the first and second ratios and then adjusting them with a weighting coefficient. This method allows for real-time monitoring of changes in the workshop's heating and cooling load: when multiple units are operating at high frequencies, it indicates a high load, and the correction term is adjusted accordingly to adjust the target value and avoid over-cooling or over-heating; when a few units are operating at low frequencies, it indicates a low load, and the correction term is adjusted accordingly to prevent energy waste. The equipment load correction term, used in conjunction with the environmental deviation correction term, forms the basis for calculating the dynamic target temperature, ensuring that the control strategy can respond to environmental disturbances while adapting to the actual operating conditions of the equipment.

[0068] S203, the target ambient temperature is obtained by correcting the reference ambient temperature using the environmental deviation correction term and the equipment load correction term.

[0069] In this embodiment, the target ambient temperature is a dynamic setpoint generated after multivariate coupling calculation and used to guide PID control. Specifically, the target ambient temperature can be calculated according to the following formula (3):

[0070] T4 = T2 - ΔT - ΔL (3);

[0071] Where T4 represents the reference ambient temperature.

[0072] In this embodiment, the environmental deviation correction term primarily offsets heat load fluctuations caused by indoor and outdoor temperature differences, while the equipment load correction term is fine-tuned based on the current system output. The combined effect of these two factors ensures that the target ambient temperature is no longer a rigid, fixed value, but a dynamic parameter that adapts in real-time to changes in the external environment and internal load. Therefore, the target ambient temperature can more accurately match the actual process requirements of monocrystalline production, ensuring rapid cooling under high-temperature or high-load conditions while avoiding overcooling under low-load conditions, significantly improving the robustness of temperature control and energy-saving performance.

[0073] S204 uses indoor ambient temperature as the feedback value and target ambient temperature as the target value, and performs deviation calculation through a proportional-integral-differential algorithm.

[0074] In this embodiment, based on the difference between the dynamically generated target ambient temperature and the real-time collected indoor ambient temperature, a precise fan frequency adjustment command is obtained through PID calculation, thereby adjusting the air supply volume of the combined air conditioning unit. The PID algorithm is a classic closed-loop control algorithm used to calculate the control output based on the deviation between the target value and the feedback value.

[0075] Specifically, the indoor ambient temperature is used as the feedback value, and the target ambient temperature is used as the target value. The deviation between the two is calculated in real time. Then, the PID algorithm performs proportional amplification, integral accumulation, and derivative prediction processing on this deviation. The proportional component responds to the current deviation magnitude, the integral component eliminates static errors, and the derivative component suppresses temperature overshoot. Finally, an analog signal is output, which directly corresponds to the target frequency of the fan inverter. For example, when the target ambient temperature is 21℃ and the measured indoor temperature is 22.0℃, the deviation is negative. The PID algorithm will output a command to reduce the fan frequency, reducing the air supply to decrease the cooling output, until the indoor temperature returns to near the target value. Through this PID closed-loop control based on a dynamic target value, millisecond-level rapid response of the fan frequency is achieved, ensuring that the temperature in the single-crystal workshop remains stable within the high-precision range allowed by the process.

[0076] In one possible implementation, the introduction of permissible temperature deviations based on the single-crystal process can establish a safety barrier before or after multivariate coupled operations, preventing the target value from going out of control due to external extreme environmental interference or internal calculation logic anomalies. In this regard, an embodiment of this application provides a control method for a single-crystal workshop combined air conditioning unit, wherein step S102, "correcting the reference environmental parameters with equipment operating parameters and measured environmental parameters to obtain the target environmental parameters, and using the measured environmental parameters as feedback values ​​and the target environmental parameters as the target values, performing deviation calculations through a proportional-integral-differential algorithm," further includes the following steps:

[0077] Obtain the allowable temperature deviation of the single crystal process, and determine the allowable range of the reference ambient temperature based on the allowable temperature deviation and the reference ambient temperature; limit the target ambient temperature using the allowable range of the reference ambient temperature.

[0078] In this embodiment, the allowable temperature deviation for the single crystal process is the maximum tolerance threshold for fluctuations in the ambient temperature of the workshop during the single crystal pulling production process. This threshold is typically preset based on the thermal characteristics of the single crystal furnace and the crystal growth quality requirements. For example, for the high-purity single crystal silicon pulling process, the allowable temperature deviation can be set to ±0.5℃. This means that an indoor ambient temperature deviating from the reference ambient temperature by more than 0.5℃ may lead to lattice defects or edge breakage accidents.

[0079] Using the reference ambient temperature as the center value, allowable temperature deviations are added to and subtracted from it to obtain the upper and lower limits of the allowable ambient temperature range. Specifically, assuming the allowable temperature deviation is ΔT_allow, the reference ambient temperature allowable range is [T2-ΔT_allow, T2+ΔT_allow]. Because the target ambient temperature, obtained after dynamically correcting the reference ambient temperature due to drastic changes in outdoor ambient temperature or sudden changes in equipment load, may exceed the actual tolerance range of the single-crystal process, this reference ambient temperature allowable range constitutes a hard safety boundary for the target ambient temperature, ensuring that the target ambient temperature does not deviate from the process-permitted safe range.

[0080] Furthermore, the target ambient temperature is forcibly locked within the allowable range of the baseline ambient temperature. Specifically, if the target ambient temperature is greater than the upper limit of the allowable range, it is forcibly set to the upper limit; if the target ambient temperature is less than the lower limit, it is forcibly set to the lower limit; if the target ambient temperature is between the upper and lower limits, it remains unchanged. This limiting constraint mechanism not only ensures the absolute safety of process parameters but also enhances the robustness of the control system under extreme conditions, ensuring that airflow adjustment is always based on a reasonable target value that conforms to process specifications.

[0081] S103 performs coordinated control of start-up, shutdown, and interlocking protection on the combined air conditioning unit based on the air volume adjustment results and equipment operating parameters.

[0082] In this embodiment, the current air supply volume adjustment requirement is determined based on the air supply volume adjustment result, as well as the health status of the equipment itself, and the braking decision is made to start or stop the combined air conditioning unit, or to shut it down for protection.

[0083] In one possible implementation, interlocking protection conditions can be set to prioritize equipment safety, and then the shutdown, startup, or continuous operation of the combined air conditioning unit can be controlled based on shutdown conditions (such as prolonged periods without high airflow and consistently compliant measured environmental parameters). This collaborative control mechanism enables automated management of the entire equipment lifecycle. It avoids production interruptions and equipment damage caused by faults through interlocking protection, and eliminates reliance on manual operation and energy waste through intelligent start-stop, ensuring continuous, safe, and efficient production operation in the monocrystalline workshop.

[0084] See Figure 3 , Figure 3 This is another schematic flowchart illustrating a control method for a monocrystalline workshop combined air conditioning unit provided in an embodiment of this application. (See attached diagram.) Figure 3As shown in the embodiment of this application, a control method for a monocrystalline workshop combined air conditioning unit is provided. The equipment operating parameters include the equipment self-test status. Step S103, "based on the air volume adjustment results and equipment operating parameters, performs coordinated control of start-up, shutdown and interlock protection on the combined air conditioning unit", may include steps S301 to S305. These steps are described in detail below.

[0085] S301, determine whether the device self-test status meets the preset interlock protection conditions; if yes, proceed to step S302; if no, proceed to step S303.

[0086] In this embodiment, before or during operation of the combined air conditioning unit, health status and operating mode signals are collected and verified in real time to serve as the equipment self-check status. The sources of the equipment self-check status may include fault codes fed back by the fan inverter, differential pressure values ​​output by the filter differential pressure transmitter, and status signals from the local / remote mode switch.

[0087] By determining whether the equipment's self-test status meets the interlocking protection conditions, the highest priority safety barrier of the control logic can be established, ensuring that the system is in a safe and controllable state before any control command is issued. The interlocking protection conditions are a set of thresholds that trigger emergency shutdown protection, which may include at least one of the following: local manual mode, fan inverter overload, and filter differential pressure exceeding the limit.

[0088] Specifically, the local manual mode is when the control authority of the combined air conditioning unit is switched to the local control cabinet or local operation panel. In this mode, the system cannot directly issue automatic adjustment commands. This setting is to prevent the system from attempting frequency adjustment or start / stop operations while the equipment is running under manual intervention, thus avoiding equipment malfunctions or personnel safety accidents caused by control command conflicts. Fan inverter overload occurs when the output current of the inverter driving the supply fan exceeds its rated threshold or an overcurrent fault signal is detected. Monitoring this parameter can promptly identify abnormalities in the electrical drive system, preventing motor burnout or inverter damage due to continuous overload. Filter differential pressure exceeding the limit occurs when the air pressure difference between the air inlet and outlet of the combined air conditioning unit exceeds the preset safe range. This differential pressure value is collected in real time by differential pressure transmitters installed on both sides of the filter. When the filter is severely clogged with dust, airflow resistance increases and the differential pressure rises significantly. If maintenance is not performed in time, it will lead to a sharp decrease in airflow, reduced heat exchange efficiency, and even fan surge or overload.

[0089] The interlocking protection conditions are considered met if any one of the above three conditions is met. For example, when the differential pressure transmitter detects a differential pressure across the filter reaching 450 Pa (the preset threshold is 400 Pa), it is determined that the filter differential pressure has exceeded the limit; or when the frequency converter reports a fault code indicating overcurrent, it is determined that the fan frequency converter is overloaded. By incorporating these key risk points into the interlocking protection conditions, the automatic operation process can be cut off instantly when the equipment is in an uncontrolled state or has potential hardware failure, preventing the system from forcibly operating in faulty or non-automatic mode, thereby avoiding the escalation of equipment damage accidents.

[0090] S302 triggers the shutdown of the combined air conditioning unit and issues a warning.

[0091] In this embodiment, if the equipment's self-test status meets the interlocking protection conditions, the highest priority protection action is directly executed, triggering the shutdown of the combined air conditioning unit and issuing an early warning. Specifically, the main power contactor of the combined air conditioning unit is cut off or the inverter operation is stopped, causing the fan speed to drop rapidly to zero. Additionally, fault information is sent to the operator via audible and visual alarms, a pop-up window in the central control room, or SMS notifications to issue an early warning. The fault information may include specific fault types (such as filter blockage or motor overload). For example, once a filter differential pressure exceeding the limit is detected, the unit is forcibly shut down within 0.5 seconds to prevent the fan from burning out due to excessive resistance. Simultaneously, a red warning box pops up on the host computer interface, prompting the user to replace the filter. This significantly improves the safety of equipment operation and effectively prevents the loss of control over the single-crystal workshop production environment and permanent damage to core equipment components due to the spread of faults.

[0092] S303, determine whether the air volume adjustment result meets the preset shutdown conditions; if yes, proceed to step S304; if no, proceed to step S305.

[0093] In this embodiment, the preset shutdown condition is a logical threshold for determining that the workshop environment has been stable for a long period and no further air supply is needed. This is typically set to an airflow adjustment result that is lower than the minimum sustaining airflow threshold for N consecutive sampling periods, or an absolute value of the deviation between the measured indoor environmental parameters and the target environmental parameters that is consistently less than the allowable error range. By introducing the airflow adjustment result as the shutdown criterion, a shift from timed start-up and shutdown to on-demand start-up and shutdown is achieved, effectively preventing energy waste caused by inefficient equipment operation.

[0094] S304, controls the shutdown of the combined air conditioning unit.

[0095] In this embodiment, if the air volume adjustment result meets the shutdown conditions, the frequency of the fan inverter is gradually reduced to the stop point according to the preset smooth shutdown curve, or a shutdown command is directly issued. This not only stops the consumption of electrical energy, but also reduces mechanical wear, thereby significantly reducing the overall operating energy consumption of the combined air conditioning unit.

[0096] S305 controls the start-up of the combined air conditioning unit according to the air volume adjustment result.

[0097] In this embodiment, if the air supply volume condition does not meet the shutdown conditions, the air supply volume adjustment is converted into a specific fan frequency target value and sent to the fan frequency converter to drive the combined air conditioning unit to start operating at that frequency. This dynamic start-stop and speed control mechanism based on real-time deviation ensures that the environmental parameters of the monocrystalline workshop can quickly converge to the target value, while guaranteeing that the equipment operates only when necessary, achieving synergistic optimization of temperature control accuracy and energy-saving effect.

[0098] Based on the above description, the control method for a combined air conditioning unit in a monocrystalline workshop provided in this application constructs a double-layer closed-loop fully automatic intelligent temperature control system for the combined air conditioning unit in a monocrystalline workshop. By collecting equipment operating parameters, measured environmental parameters, and reference environmental parameters in real time, and using multivariate coupling operations to dynamically generate target environmental parameters, it completely breaks the rigid mode of traditional fixed setpoints, enabling the control target to adaptively adjust with fluctuations in outdoor temperature and changes in workshop production load. On this basis, using measured environmental parameters as feedback values ​​and target environmental parameters as target values, the fan frequency is directly adjusted through a PID algorithm to change the air volume, eliminating the transmission inertia of the heat exchange medium, improving the system response speed to within 1 second, and stabilizing the temperature control accuracy at ±0.5℃, effectively solving the contradiction between the stringent environmental parameter requirements of monocrystalline production and the lag of traditional control methods. Furthermore, by combining the airflow adjustment results with the equipment's self-check status, coordinated control of start-up, shutdown, and interlocking protection is implemented. This ensures rapid shutdown and early warning in abnormal operating conditions such as equipment overload and filter clogging, while enabling on-demand start-up and shutdown under normal operating conditions, eliminating equipment idling and inefficient operation. Through this organic combination of multi-dimensional linkage, dynamic correction, frequency conversion regulation, and safety interlocking, not only are the environmental fluctuation risks in the monocrystalline silicon pulling process significantly reduced and the product yield improved, but the cost of manual intervention and equipment energy consumption are also greatly reduced, achieving high precision, high stability, and high safety in the environmental control of the monocrystalline silicon workshop.

[0099] The above describes a control method for a monocrystalline workshop combined air conditioning unit provided by the embodiments of this application. The following will describe the apparatus for implementing the above-described control method for a monocrystalline workshop combined air conditioning unit.

[0100] See Figure 4 , Figure 4 This is a schematic diagram of a control device for a monocrystalline workshop combined air conditioning unit, provided as an embodiment of this application. Figure 4 As shown in the embodiment of this application, a control device for a monocrystalline workshop combined air conditioning unit includes:

[0101] The parameter acquisition module 401 is used to acquire the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the reference environmental parameters of the monocrystalline process.

[0102] The collaborative control module 402 is used to correct the reference environmental parameters with the equipment operating parameters and measured environmental parameters to obtain the target environmental parameters. It uses the measured environmental parameters as feedback values ​​and the target environmental parameters as target values ​​to perform deviation calculations through a proportional-integral-derivative algorithm to adjust the air supply volume of the combined air conditioning unit. Based on the air supply volume adjustment results and equipment operating parameters, it performs collaborative control of start-up, shutdown and interlocking protection on the combined air conditioning unit.

[0103] In one possible implementation, the equipment operating parameters include the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans; the measured environmental parameters include the indoor ambient temperature and the outdoor ambient temperature; and the reference environmental parameters include the reference ambient temperature.

[0104] The collaborative control module 402 is used to correct the baseline environmental parameters using equipment operating parameters and measured environmental parameters to obtain the target environmental parameters, and to perform deviation calculations using a proportional-integral-derivative algorithm with the measured environmental parameters as feedback values ​​and the target environmental parameters as target values. Specifically, it is used for:

[0105] The environmental deviation correction term is determined based on the indoor ambient temperature, outdoor ambient temperature, and reference ambient temperature; the equipment load correction term is determined based on the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans; the reference ambient temperature is corrected using the environmental deviation correction term and the equipment load correction term to obtain the target ambient temperature; the deviation is calculated using a proportional-integral-differential algorithm with the indoor ambient temperature as the feedback value and the target ambient temperature as the target value.

[0106] In one possible implementation, the collaborative control module 402, which corrects the reference environmental parameters using equipment operating parameters and measured environmental parameters to obtain the target environmental parameters, and performs deviation calculations using a proportional-integral-derivative algorithm with the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, further includes:

[0107] Obtain the allowable temperature deviation of the single crystal process, and determine the allowable range of the reference ambient temperature based on the allowable temperature deviation and the reference ambient temperature; limit the target ambient temperature using the allowable range of the reference ambient temperature.

[0108] In one possible implementation, the equipment operating parameters include the equipment self-test status, and a collaborative control module 402 for performing coordinated control of start-up, shutdown, and interlocking protection of the combined air conditioning unit based on the air volume adjustment results and the equipment operating parameters, specifically used for:

[0109] Determine whether the equipment self-test status meets the preset interlock protection conditions; if the equipment self-test status meets the interlock protection conditions, trigger the shutdown of the combined air conditioning unit and issue an early warning; if the equipment self-test status does not meet the interlock protection conditions, determine whether the air supply volume adjustment result meets the preset shutdown conditions; if the air supply volume condition result meets the shutdown conditions, control the combined air conditioning unit to shut down; if the air supply volume condition result does not meet the shutdown conditions, control the combined air conditioning unit to start according to the air supply volume adjustment result.

[0110] In one possible implementation, the interlock protection conditions include at least one of: local manual mode, fan inverter overload, and filter differential pressure exceeding the limit.

[0111] It should be noted that the detailed functions of each module in the embodiments of this application can be found in the corresponding disclosure of the above-mentioned embodiments of the control method for combined air conditioning units in monocrystalline workshops, and will not be repeated here.

[0112] This application also provides an electronic device in its embodiments. See also... Figure 5 , Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device in this embodiment may include, but is not limited to, fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Figure 5 The electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0113] like Figure 5 As shown, the electronic device may include a processing unit (e.g., a central processing unit, a graphics processing unit, etc.) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage device 508 into a random access memory (RAM) 503. When the electronic device is powered on, the RAM 503 also stores various programs and data required for the operation of the electronic device. The processing unit 501, ROM 502, and RAM 503 are interconnected via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0114] Typically, the following devices can be connected to I / O interface 505: input devices 506 including, for example, touchscreens, touchpads, keyboards, mice, cameras, microphones, accelerometers, gyroscopes, etc.; output devices 507 including, for example, liquid crystal displays (LCDs), speakers, vibrators, etc.; storage devices 508 including, for example, memory cards, hard drives, etc.; and communication devices 509. Communication device 509 allows electronic devices to communicate wirelessly or wiredly with other devices to exchange data. Although Figure 5Electronic devices with various devices are shown, but it should be understood that it is not required to implement or have all of the devices shown. More or fewer devices may be implemented or have alternatively.

[0115] This application also provides a computer program product including computer-readable instructions, which, when executed on an electronic device, cause the electronic device to implement any of the single-crystal workshop combined air conditioning unit control methods provided in this application.

[0116] This application also provides a computer-readable storage medium carrying one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any of the single-crystal workshop combined air conditioning unit control methods provided in this application.

[0117] It should also be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. In addition, in the device embodiment drawings provided in this application, the connection relationship between modules indicates that they have a communication connection, which can be implemented as one or more communication buses or signal lines.

[0118] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware, or it can be implemented by special-purpose hardware including application-specific integrated circuits, special-purpose CPUs, special-purpose memory, special-purpose components, etc. Generally, any function performed by a computer program can be easily implemented by corresponding hardware, and the specific hardware structure used to implement the same function can also be diverse, such as analog circuits, digital circuits, or special-purpose circuits. However, for this application, software program implementation is more often the preferred implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a readable storage medium, such as a computer floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk, or optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, training equipment, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0119] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product.

[0120] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions may be transmitted from one website, computer, training device, or data center to another website, computer, training device, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a training device or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., DVDs), or semiconductor media (e.g., solid-state drives (SSDs)).

Claims

1. A control method for a combined air conditioning unit in a monocrystalline workshop, characterized in that, The control method for the monocrystalline workshop combined air conditioning unit includes: Obtain the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the baseline environmental parameters of the monocrystalline process; The target environmental parameters are obtained by correcting the baseline environmental parameters with the equipment operating parameters and the measured environmental parameters. The deviation is calculated by using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, and the air volume of the combined air conditioning unit is adjusted by using a proportional-integral-derivative algorithm. Based on the air volume adjustment results and the equipment operating parameters, the combined air conditioning unit is subjected to coordinated control of start-up, shutdown, and interlocking protection.

2. The control method for a combined air conditioning unit in a monocrystalline workshop according to claim 1, characterized in that, The equipment operating parameters include the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans; the measured environmental parameters include indoor ambient temperature and outdoor ambient temperature; and the reference environmental parameters include the reference ambient temperature. The process of correcting the baseline environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and then using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performs deviation calculations using a proportional-integral-differential algorithm, including: An environmental deviation correction term is determined based on the indoor ambient temperature, the outdoor ambient temperature, and the reference ambient temperature. The equipment load correction item is determined based on the number of operating air conditioners, the total number of air conditioners, and the average frequency of the fans. The target ambient temperature is obtained by correcting the reference ambient temperature using the environmental deviation correction term and the equipment load correction term. Using the indoor ambient temperature as the feedback value and the target ambient temperature as the target value, the deviation is calculated using a proportional-integral-differential algorithm.

3. The control method for a combined air conditioning unit in a monocrystalline workshop according to claim 2, characterized in that, The step of correcting the baseline environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, and performing deviation calculations using a proportional-integral-differential algorithm, further includes: Obtain the allowable temperature deviation for the single crystal process, and determine the allowable range of the reference ambient temperature based on the allowable temperature deviation and the reference ambient temperature; The target ambient temperature is constrained by limiting the range of the baseline ambient temperature.

4. The control method for a combined air conditioning unit in a monocrystalline workshop according to claim 1, characterized in that, The equipment operating parameters include the equipment self-test status. The coordinated control of the combined air conditioning unit for start-up, shutdown, and interlocking protection based on the air volume adjustment results and the equipment operating parameters includes: Determine whether the device's self-test status meets the preset interlocking protection conditions; If the self-test status of the equipment meets the interlock protection conditions, the combined air conditioning unit is triggered to stop and an early warning is issued; If the self-test status of the equipment does not meet the interlock protection conditions, determine whether the air volume adjustment result meets the preset shutdown conditions; If the air supply volume condition result meets the shutdown condition, control the combined air conditioning unit to shut down; If the air supply volume condition result does not meet the shutdown condition, the combined air conditioning unit is controlled to start according to the air supply volume adjustment result.

5. The control method for a combined air conditioning unit in a monocrystalline workshop according to claim 4, characterized in that, The interlock protection conditions include at least one of the following: local manual mode, fan inverter overload, and filter differential pressure exceeding the limit.

6. A control device for a combined air conditioning unit in a single-crystal workshop, characterized in that, The control device for the monocrystalline workshop combined air conditioning unit includes: The parameter acquisition module is used to acquire the equipment operating parameters of the combined air conditioning unit, the measured environmental parameters of the monocrystalline workshop, and the reference environmental parameters of the monocrystalline process. The collaborative control module is used to correct the reference environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and to perform deviation calculation using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, thereby adjusting the air supply volume of the combined air conditioning unit through a proportional-integral-derivative algorithm; based on the air supply volume adjustment results and the equipment operating parameters, it performs collaborative control of start-up, shutdown and interlocking protection on the combined air conditioning unit.

7. The control device for a combined air conditioning unit in a single-crystal workshop according to claim 6, characterized in that, The equipment operating parameters include the number of air conditioners in operation, the total number of air conditioners, and the average frequency of the fans; the measured environmental parameters include indoor ambient temperature and outdoor ambient temperature; and the reference environmental parameters include the reference ambient temperature. The collaborative control module, used to correct the reference environmental parameters using the equipment operating parameters and the measured environmental parameters to obtain the target environmental parameters, and using the measured environmental parameters as feedback values ​​and the target environmental parameters as target values, performs deviation calculations using a proportional-integral-derivative algorithm, specifically is used for: An environmental deviation correction term is determined based on the indoor ambient temperature, the outdoor ambient temperature, and the reference ambient temperature; an equipment load correction term is determined based on the number of operating air conditioners, the total number of air conditioners, and the average frequency of the fans; the reference ambient temperature is corrected using the environmental deviation correction term and the equipment load correction term to obtain the target ambient temperature; the deviation is calculated using a proportional-integral-differential algorithm with the indoor ambient temperature as the feedback value and the target ambient temperature as the target value.

8. A computer program product, characterized in that, It includes computer-readable instructions that, when executed on an electronic device, cause the electronic device to implement the single-crystal workshop combined air conditioning unit control method as described in any one of claims 1 to 5.

9. An electronic device, characterized in that, It includes at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is used to execute the computer program so that the electronic device can implement the control method for a monocrystalline workshop combined air conditioning unit as described in any one of claims 1 to 5.

10. A computer storage medium, characterized in that, The storage medium carries one or more computer programs that, when executed by an electronic device, enable the electronic device to implement the single-crystal workshop combined air conditioning unit control method as described in any one of claims 1 to 5.

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