A method, apparatus, air conditioning equipment, and storage medium for unit load regulation.

Abstract

This invention discloses a method, device, air conditioning equipment, and storage medium for unit load regulation. The method includes: after unit startup, determining whether the total time required for the unit to reach full load frequency from startup to operation meets a preset time requirement based on the unit's actual operating frequency and loading parameters; if not, adjusting the loading parameters; acquiring the unit's COP and determining whether the COP meets preset performance requirements; if not, adjusting the opening of the unit's electronic expansion valve; if the opening of the electronic expansion valve is reduced, determining whether to continue or stop adjusting based on changes in the evaporation temperature. This invention intelligently adjusts the unit's load control parameters to meet different rapid loading time requirements; it can continuously adjust the opening of the system's electronic expansion valve according to the current operating status, thereby meeting the unit's energy efficiency requirements under different operating conditions and achieving efficient and stable unit operation.

Description

Technical Field

[0001] This invention relates to the field of air conditioning equipment technology, and more specifically, to a unit load control method, device, air conditioning equipment, and storage medium. Background Technology

[0002] Screw chillers are widely used in various refrigeration environments due to their high reliability and wide operating range. With the continuous development and improvement of science and technology, and the continuous improvement of living standards, the demand for high-efficiency computer rooms, precision air-conditioning computer rooms, and process air-conditioning computer rooms is constantly increasing. The requirements for the overall energy efficiency and load control stability of screw chillers are becoming increasingly stringent.

[0003] For conventional variable frequency screw chillers, the loading and unloading frequency parameters are usually set to fixed parameters for loading and unloading control. This results in fixed loading and unloading times. This cannot meet the requirements of modern high-efficiency data center air conditioners for rapid startup under different operating conditions, nor the high-efficiency operation requirements of process air conditioners and precision air conditioners.

[0004] There is currently no effective solution to the problem that existing technologies cannot achieve rapid start-up and have poor operating efficiency of generator units. Summary of the Invention

[0005] This invention provides a unit load regulation method, device, air conditioning equipment, and storage medium to solve the problems of unit in the prior art being unable to achieve rapid start-up and having poor operating efficiency.

[0006] To address the aforementioned technical problems, this invention provides a unit load control method, comprising: after unit startup, determining whether the total time required for the unit to reach full load frequency from startup to operation meets a preset time requirement based on the unit's actual operating frequency and loading parameters; if not, adjusting the loading parameters; acquiring the unit's COP and determining whether the unit's COP meets a preset performance requirement; if not, adjusting the opening of the unit's electronic expansion valve; if the opening of the electronic expansion valve is reduced, determining whether to continue adjusting or stop adjusting based on changes in the evaporation temperature.

[0007] Furthermore, based on the actual operating frequency and loading parameters of the unit, it is determined whether the total time required for the unit to go from startup to full load frequency meets the preset time requirement, including: determining the total time required for the unit to go from startup to full load frequency based on the actual operating frequency and loading parameters of the unit; determining whether the total time is less than or equal to the preset time; if so, it is determined that the total time meets the preset time requirement; if not, it is determined that the total time does not meet the preset time requirement.

[0008] Furthermore, based on the actual operating frequency and loading parameters of the unit, the total time required for the computer group to run from startup to full load frequency includes: the time T1 required for the computer group to run from the actual operating frequency to full load frequency based on the actual operating frequency and loading parameters of the unit; adding T1 to the time T2 for the unit to run from startup to the actual operating frequency to obtain the total time.

[0009] Furthermore, based on the actual operating frequency and load parameters of the unit, the time T1 required for the computer unit to operate from the actual operating frequency to the full load frequency is calculated using the following formula:

[0010] T1 = a * (Q0 - Q1) / V1;

[0011] V1 = f1 / t1;

[0012] The loading parameters include loading frequency and loading cycle, where f1 is the loading frequency, t1 is the loading cycle, V1 is the loading rate, a is the proportional coefficient, Q0 is the full load frequency, and Q1 is the actual operating frequency.

[0013] Furthermore, if the conditions are not met, the loading parameters are adjusted, including: if the total duration does not meet the preset time requirement, increasing the loading frequency and / or decreasing the loading cycle; wherein the loading parameters include the loading frequency and the loading cycle.

[0014] Further, determining whether the unit COP meets the preset performance requirements includes: calculating the deviation value between the unit COP and the preset COP; determining whether the deviation value is within a preset range; if yes, then determining that the unit COP meets the preset performance requirements; if no, then determining that the unit COP does not meet the preset performance requirements.

[0015] Furthermore, if the condition is not met, the opening of the unit's electronic expansion valve is adjusted, including: obtaining the evaporator end temperature difference; wherein, the evaporator end temperature difference is the difference between the chilled water outlet temperature and the evaporation temperature; and adjusting the opening of the electronic expansion valve according to whether the evaporator end temperature difference is within a preset reasonable range.

[0016] Furthermore, depending on whether the temperature difference at the evaporator end is within a preset reasonable range, the opening of the electronic expansion valve is adjusted to be increased or decreased, including: if the temperature difference at the evaporator end is within a preset reasonable range, the opening of the electronic expansion valve is decreased; if the temperature difference at the evaporator end is not within a preset reasonable range, the opening of the electronic expansion valve is increased.

[0017] Furthermore, if the opening of the electronic expansion valve is reduced, the decision to continue or stop the adjustment is made based on the change in the evaporation temperature. This includes: detecting whether the evaporation temperature changes during the process of reducing the opening of the electronic expansion valve; if the evaporation temperature decreases and the decrease exceeds a preset value, then the adjustment is stopped and the current opening of the electronic expansion valve is maintained; otherwise, the opening of the electronic expansion valve is further reduced.

[0018] Furthermore, the method also includes: detecting the rate of change of the chilled water outlet temperature of the unit; determining whether the unit's operating status meets the preset water temperature change requirements based on the rate of change of the water temperature; and adjusting the rate of change of the water temperature if the requirements are not met.

[0019] Furthermore, the rate of change of chilled water temperature at the unit's outlet temperature is measured, including:

[0020] When the temperature difference between the chilled water outlet temperature of the unit and the preset water temperature is within a preset range, the detection cycle is started; based on the water temperature at the beginning and end of the detection cycle, the rate of change of the chilled water outlet temperature of the computer unit is calculated.

[0021] Further, determining whether the unit's operating status meets the preset water temperature change requirements based on the water temperature change rate includes: calculating the preset water temperature change rate based on the detection cycle; wherein, the preset water temperature change rate ΔT0 = b / detection cycle, and b is a preset difference;

[0022] Determine whether the rate of change of the chilled water outlet temperature is less than or equal to the preset rate of change of the water temperature. If yes, determine that the rate of change of the water temperature meets the preset water temperature change requirement; otherwise, determine that the rate of change of the water temperature does not meet the preset water temperature change requirement.

[0023] Furthermore, if the conditions are not met, the water temperature change rate is adjusted, including: if the conditions are not met, the operating frequency of the unit is reduced to adjust the water temperature change rate.

[0024] The present invention also provides a unit load control device, wherein the device comprises:

[0025] The first adjustment module is used to determine, after the unit starts up, whether the total time required for the unit to run from startup to full load frequency meets the preset time requirement based on the actual operating frequency and loading parameters of the unit. If it does not meet the preset time requirement, the loading parameters are adjusted.

[0026] The second adjustment module is used to obtain the unit's COP and determine whether the unit's COP meets the preset performance requirements; if it does not meet the requirements, the opening of the unit's electronic expansion valve is adjusted; if the opening of the electronic expansion valve is reduced, the adjustment is continued or stopped based on the change in evaporation temperature.

[0027] Furthermore, the device also includes: a third adjustment module, used to detect the rate of change of the chilled water outlet temperature of the unit; and to determine whether the unit's operating status meets the preset water temperature change requirements based on the rate of change of the water temperature, and if not, to adjust the rate of change of the water temperature.

[0028] The present invention also provides an air conditioning device, wherein the air conditioning device includes the above-mentioned unit load control device.

[0029] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method as described above.

[0030] This invention provides an adaptive, high-efficiency intelligent load control scheme. During unit start-up, shutdown, and normal operation, the loading / unloading frequency parameters and electronic expansion valve control parameters are continuously optimized and adjusted based on actual load demands and loading time requirements. This ensures the unit can meet different loading time requirements and achieve optimal energy efficiency under full load conditions. By intelligently adjusting the unit's loading control parameters, different rapid loading time requirements are met. The electronic expansion valve opening is adaptively adjusted according to the unit's actual load status, ensuring safe and efficient operation of the unit under various operating conditions. Attached Figure Description

[0031] Figure 1 This is a flowchart of a unit load control method according to an embodiment of the present invention;

[0032] Figure 2 This is a schematic diagram of intelligent adjustment of unit loading parameters according to an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of intelligent optimization control of the unit's electronic expansion valve according to an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of unit adaptive load stabilization control according to an embodiment of the present invention;

[0035] Figure 5 This is a diagram of an adaptive high-efficiency intelligent load control system according to an embodiment of the present invention;

[0036] Figure 6 This is a structural block diagram of a unit load control device according to an embodiment of the present invention. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0038] The terminology used in the embodiments of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The singular forms “a,” “the,” and “the” as used in the embodiments of this invention and the appended claims are also intended to include the plural forms, and “multiple” generally includes at least two unless the context clearly indicates otherwise.

[0039] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0040] Depending on the context, the words “if” or “suppose” as used here can be interpreted as “when” or “in response to determination” or “in response to detection.” Similarly, depending on the context, the phrases “if determination” or “if detection (of the stated condition or event)” can be interpreted as “when determination” or “in response to determination” or “when detection (of the stated condition or event)” or “in response to detection (of the stated condition or event).”

[0041] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0042] The optional embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1

[0043] According to an embodiment of the present invention, a method for regulating unit load is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0044] Figure 1 This is a flowchart of a unit load control method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0045] Step S101: After the unit starts, based on the actual operating frequency and loading parameters of the unit, determine whether the total time required for the unit to go from startup to full load frequency meets the preset time requirement. If it does not meet the requirement, adjust the loading parameters.

[0046] Step S102: Obtain the unit COP and determine whether the unit COP meets the preset performance requirements; if it does not meet the requirements, adjust the opening of the unit's electronic expansion valve; if the opening of the electronic expansion valve is reduced, determine whether to continue adjusting or stop adjusting based on the change in evaporation temperature.

[0047] This embodiment provides an adaptive, high-efficiency intelligent load control scheme. Step S101 is the intelligent rapid start-up scheme, and step S102 is the high-efficiency control scheme. During unit start-up, shutdown, and normal operation, this embodiment continuously optimizes and adjusts the unit's loading / unloading frequency parameters and electronic expansion valve control parameters based on actual load demands and loading time requirements. This ensures the unit can meet different loading time requirements and achieve optimal energy efficiency under full load conditions. By intelligently adjusting the unit's loading control parameters, different rapid loading time requirements are met. The electronic expansion valve opening is adaptively adjusted according to the unit's actual load status, ensuring safe and efficient operation of the unit under different operating conditions.

[0048] The intelligent fast start-up solution and the efficient control solution are introduced below.

[0049] (1) Intelligent quick start solution

[0050] Figure 2 This is a schematic diagram of intelligent adjustment of unit loading parameters according to an embodiment of the present invention, such as... Figure 2 As shown, the process for intelligent adjustment of unit loading parameters is as follows:

[0051] When the unit starts up, it will combine the actual load frequency settings (referred to as load parameters, including load frequency and load cycle) and the current operating frequency to calculate the time T required for the unit to reach the specified load Q0 (i.e., full load frequency), and compare T with the preset time requirement T0. 预设 The comparison is performed. If the current loading parameters meet the requirements, then the loading parameters will not be adjusted for the time being. If the time frame exceeds the requirements, then the existing loading parameters will be adjusted.

[0052] Based on this, this embodiment provides a preferred implementation method, which involves determining whether the total time required for the unit to go from startup to full load frequency meets the preset time requirement based on the unit's actual operating frequency and loading parameters. This includes: calculating the total time required for the unit to go from startup to full load frequency based on the unit's actual operating frequency and loading parameters; determining whether the total time is less than or equal to the preset time; if so, determining that the total time meets the preset time requirement; otherwise, determining that the total time does not meet the preset time requirement. This allows for a quick and accurate determination of whether the unit's current loading parameters can meet the unit's startup time requirements. If the requirement for efficient and rapid startup cannot be achieved, the loading parameters can be adjusted in a timely manner to shorten the startup time.

[0053] When calculating the total time T required for a computer unit to reach full load frequency from startup, we can first determine the time T1 required for the unit to reach full load frequency based on its actual operating frequency and load parameters. Then, we add the time T2 from startup to reaching the actual operating frequency to T1 to obtain the total time T. This allows for accurate calculation of the total time T required for the unit to reach full load frequency, regardless of the specific time point in the calculation.

[0054] The time T1 required for the unit to operate from its actual operating frequency to its full-load frequency can be calculated using the following formula:

[0055] T1 = a * (Q0 - Q1) / V1;

[0056] V1 = f1 / t1;

[0057] Total duration T = a * (Q0 - Q1) / V1 + T2.

[0058] The loading parameters include loading frequency and loading cycle, where f1 is the loading frequency, t1 is the loading cycle, V1 is the loading rate, a is the proportional coefficient, Q0 is the full load frequency, and Q1 is the actual operating frequency.

[0059] The unit's loading process is affected by two parameters: loading frequency f and loading period t. The loading rate V (f / t) can be accurately calculated based on the loading frequency f and loading period t. For example, if the loading frequency is 1Hz and the loading period is 1s, the actual loading is 1Hz per second. Using the loading rate V, the current operating frequency Q1, and the full-load frequency Q0, the time T required for the unit to reach full load under this condition can be obtained. Then, T is compared with the required full-load time T0. 预设 Compare the results with the preset time requirement and adjust the loading parameters accordingly. If the total duration T does not meet the preset time requirement T... 预设In this way, the loading frequency can be increased and / or the loading cycle can be decreased, thereby shortening the unit's start-up time in a timely manner, meeting the unit's start-up time requirements, and achieving the requirement of efficient and rapid unit start-up.

[0060] The following example illustrates this:

[0061] Assuming the unit's full-load frequency is 200Hz, the current frequency is 120Hz, the loading frequency f is 1, and the loading cycle is 2s, the time required for the unit to reach full load is T1 = (200-120) / (1 / 2) = 160s. Adding the time T2 from unit startup to reaching 120Hz, the total time from startup to full load is T = T1 + T2. Then, compare T with the preset time requirement T. 预设 If T≤T 预设 If T > T, then no adjustment of the loading parameters is needed. 预设 If the current loading parameters do not meet the time requirement to reach full load, the unit's loading parameters need to be adjusted: increase the loading frequency and / or decrease the loading cycle. Then, the adjusted parameters are recalculated and compared according to the above formula. This allows for real-time control of the unit's startup time throughout the entire process from startup to full load, meeting the high-speed startup requirements of a high-efficiency data center.

[0062] (2) High-efficiency control scheme

[0063] Figure 3 This is a schematic diagram of the intelligent optimization control of the unit's electronic expansion valve according to an embodiment of the present invention, as shown below. Figure 3 As shown, the process of intelligent optimization control of the unit's electronic expansion valve is as follows:

[0064] After the unit is started, it strives to achieve optimal energy efficiency under various load conditions. The unit calculates its Coefficient of Performance (COP) based on parameters such as water temperature, flow rate, frequency, and load, combined with factory testing and calculation data. COP is the energy efficiency ratio between energy and heat, and is the ratio of the compressor's cooling capacity to its electrical power consumption. The specific formula is: COP = Cooling Capacity / Cooling Power. Here, cooling capacity refers to the heat removed by the air conditioner per unit time, and cooling power represents the electricity consumed by the air conditioner in the same amount of time.

[0065] Meanwhile, based on the aforementioned parameters and the unit's power, the computer calculates the actual performance coefficient N1 of the unit under this condition. By comparing N1 and N0, if the deviation is within a reasonable range, no adjustment is made. If N1 is lower than N0 and exceeds the deviation value ΔN, the opening of the throttling electronic expansion valve is automatically optimized and adjusted.

[0066] Based on this, this embodiment provides a preferred implementation method, namely, determining whether the unit COP meets the preset performance requirements, including: the deviation value between the unit COP and the preset COP; determining whether the deviation value is within a preset range; if yes, then the unit COP is determined to meet the preset performance requirements; if no, then the unit COP is determined to not meet the preset performance requirements. This allows for accurate and rapid determination of whether the unit COP meets the preset performance requirements, and if not, timely adjustments can be made.

[0067] When adjusting the opening of the electronic expansion valve, the following preferred implementation method can be used: Obtain the evaporator end temperature difference; wherein, the evaporator end temperature difference is the difference between the chilled water outlet temperature and the evaporation temperature; adjust the opening of the electronic expansion valve according to whether the evaporator end temperature difference is within a preset reasonable range. Specifically, if the evaporator end temperature difference is within the preset reasonable range, the opening of the electronic expansion valve is decreased; if the evaporator end temperature difference is not within the preset reasonable range, the opening of the electronic expansion valve is increased. This allows for adaptive adjustment of the electronic expansion valve opening according to the actual load condition of the unit, ensuring safe and efficient operation of the unit under different operating conditions.

[0068] During the adjustment process, the system will first determine whether the evaporator end temperature difference (the difference between the chilled water outlet temperature and the evaporation temperature) is within a reasonable range of Δh (5%). If it exceeds Δh, the electronic expansion valve opening will be adjusted first according to the opening change Δd1 to control the evaporator end temperature difference within Δh. Conversely, if the evaporator end temperature difference is within Δh, the opening will be continuously reduced according to the opening change Δd2. While adjusting the opening, the evaporation temperature change will be monitored. If the decrease exceeds ΔT1, the adjustment will stop, and the opening of the throttling electronic expansion valve will return to the previous action value.

[0069] △h refers to the temperature difference at the evaporator end, that is, the difference between the chilled water outlet temperature and the evaporation temperature. For example, if the chilled water outlet temperature is 7℃ and the evaporation temperature is 5.5℃, then the temperature difference △h at the evaporator end is 1.5℃.

[0070] △d refers to the change in the opening degree of the electronic expansion valve. For example, if the opening degree of the electronic expansion valve is 50 before adjustment and 48 after adjustment, then △d is 2.

[0071] △T1 refers to the decrease in evaporation temperature. Generally, the evaporation temperature will change accordingly after adjusting the opening of the electronic expansion valve, and the change range before and after is △T1.

[0072] During unit operation, the opening of the electronic expansion valve is continuously adjusted according to the current operating status to meet the energy efficiency requirements under different operating conditions. In actual operation, the unit's terminal temperature difference Δh and actual energy efficiency data N1 are monitored in real time. If N1 is detected to be less than the theoretically calculated value N0 and exceeds the deviation range ΔN, the opening of the unit's electronic expansion valve will be adjusted.

[0073] The following examples will illustrate this:

[0074] Assuming the unit's current operating energy efficiency N1 is 5.1, and the theoretical energy efficiency value N0 under this condition is 5.6, with a required ΔN value of 5%, then the actual ΔN1 of the unit is (5.6-5.1) / 5.6 = 9%. In this case, the unit's energy efficiency will be determined to be unsatisfactory. Further detection of the terminal temperature difference will be conducted, and the detection process involves the following two scenarios.

[0075] If the actual end temperature difference Δh1 is greater than Δh, the opening of the electronic expansion valve will be increased to control the end temperature difference within Δh.

[0076] If the actual terminal temperature difference Δh1 is less than Δh, it will determine whether the electronic expansion valve is over-opened and will adjust the valve opening to a smaller degree. At this point, less refrigerant is needed. While adjusting, the evaporation temperature is monitored. If the evaporation temperature does not decrease, it indicates the electronic expansion valve is indeed over-opened, and the valve opening will be adjusted further. If the evaporation temperature decreases, and the decrease exceeds ΔT1, it means the valve has been reduced to a suitable opening, and the valve will maintain the current opening as previously adjusted.

[0077] The specific control methods are as follows:

[0078] 1. △h1≥△h: Increase the opening of the electronic expansion valve according to △d1;

[0079] 2. △h1 < △h: Adjust the opening of the electronic expansion valve according to △d2, and adjust according to the following test results:

[0080] 2.1 If △T2≤△T1, continue to adjust the opening smaller according to △d2;

[0081] 2.2 When △T2 > △T1, the electronic expansion valve returns to the previous opening degree.

[0082] Based on this, this embodiment provides a preferred implementation method, namely, if the opening of the electronic expansion valve is reduced, the decision to continue or stop adjustment is determined based on the change in evaporation temperature. This includes: during the process of reducing the opening of the electronic expansion valve, detecting whether the evaporation temperature changes; if the evaporation temperature decreases and the decrease exceeds a preset value, stopping the adjustment and maintaining the current opening of the electronic expansion valve; otherwise, continuing to reduce the opening of the electronic expansion valve. Accordingly, it is possible to detect in a timely manner whether the electronic expansion valve is over-opened, thereby ensuring the safe and efficient operation of the unit under different operating conditions.

[0083] In addition to providing an intelligent and rapid start-up solution and an efficient control solution, this embodiment also takes into account the requirement of stable water temperature in the computer room during operation and proposes a stable water temperature control solution.

[0084] (3) Water temperature stabilization control scheme

[0085] Regarding unit load control, the unit is controlled by the chilled water outlet temperature. Assuming the set outlet temperature is 7℃, the unit will unload if the actual water temperature drops below 7℃. Without prior control, the water temperature will continue to drop once it reaches 7℃, resulting in temperature fluctuations. To maintain stable water temperature, the rate of temperature change must be continuously adjusted.

[0086] Based on this, this embodiment proposes a water temperature stability control scheme, including: detecting the water temperature change rate of the chilled water outlet temperature of the unit; judging whether the unit's operating status meets the preset water temperature change requirements based on the water temperature change rate; if not, adjusting the water temperature change rate.

[0087] Figure 4 This is a schematic diagram of unit adaptive load stabilization control according to an embodiment of the present invention, such as... Figure 4 As shown, the adaptive load stabilization control process of the unit is as follows:

[0088] When the unit is shut down, the water temperature will be close to room temperature. After the unit is turned on, the water temperature will drop and needs to be lowered to a specified temperature (e.g., 7°C). However, there is a time delay in the heat exchange and control of the unit, which may cause the water temperature after the control operation to be lower than the specified temperature, easily leading to the unit being idle and resulting in a poor user experience.

[0089] In this embodiment, regarding water temperature (chilled water outlet temperature) control, the actual water temperature change rate Tv1 is calculated based on the state parameters during unit operation. Then, it is calculated whether the water temperature fluctuation can be controlled within the range of ΔT when the specified water temperature is reached under this state. If so, operation continues according to the current water temperature change rate; otherwise, the unit's operating state is further adjusted to obtain new water temperature change rate parameters.

[0090] During actual operation, the water temperature change rate will be monitored. When the actual water temperature meets the requirement (Tspecified water temperature - Tactual outlet water ≤ T0, T0 = 2), monitoring of the water temperature change rate will begin. Specific testing and monitoring methods are as follows:

[0091] The unit has a fixed time monitoring cycle t0. Within cycle t0, there are initial chilled water outlet temperatures T1 at the beginning of the cycle and T2 at the end of the cycle. When the actual chilled water temperature of the unit approaches the required temperature, the current water temperature change rate ΔT = (T2 - T1) / t0 can be calculated using T1, T2, and t0. This is then compared with the water temperature change rate ΔT0 required to reach the specified water temperature (ΔT0 = (7 - 6.7) / 20 = 0.015℃ / s, the maximum allowable water temperature change rate). If ΔT > ΔT0, it is determined that the current operating state of the unit does not meet the water temperature change requirements to reach the specified water temperature. Therefore, the current load of the unit (actual operating frequency = load frequency) is adjusted to adjust the water temperature change rate.

[0092] If △T > △T0, it indicates that the water temperature change rate is too rapid, and the operating frequency of the unit needs to be reduced to control the unit's unloading, which essentially means reducing the unit's load. If △T ≤ △T0, no adjustment is needed.

[0093] Based on this, this embodiment proposes a preferred implementation method for detecting the rate of change of the chilled water outlet temperature of the unit, including: starting a detection cycle when the temperature difference between the chilled water outlet temperature of the unit and a preset water temperature is within a preset range; calculating the rate of change of the chilled water outlet temperature of the unit based on the water temperature at the beginning and end of the detection cycle. This allows for the calculation of a relatively accurate rate of change of the chilled water outlet temperature.

[0094] When determining whether the unit's operating status meets the preset water temperature change requirements based on the water temperature change rate, the preset water temperature change rate is calculated based on the detection cycle; where the preset water temperature change rate ΔT0 = b / detection cycle, and b is the preset difference. It is then determined whether the water temperature change rate of the chilled water outlet temperature is less than or equal to the preset water temperature change rate. If it is, the water temperature change rate is determined to meet the preset water temperature change requirements; otherwise, it is determined that the water temperature change rate does not meet the preset water temperature change requirements. If it does not meet the requirements, the water temperature change rate is adjusted, specifically by reducing the unit's operating frequency to adjust the water temperature change rate. This ensures that the unit's water temperature remains as stable as possible, meeting the high requirements for water temperature stability in high-efficiency machine rooms.

[0095] The following example illustrates this:

[0096] Assuming the unit is currently operating at 100% load, the set chilled water outlet temperature is 7℃, the temperature difference T0 for approaching the target temperature is 3℃, and the actual chilled water temperature is 9℃, the actual temperature difference is 2℃≤3℃, meeting the target temperature requirement. At this point, the unit will enter the water temperature change rate monitoring phase. Further assuming the unit's detection cycle is 20 seconds, with the water temperature starting at 9℃ and ending at 9.5℃, the water temperature change rate ΔT = (9.5-9) / 20 = 0.025℃ / s. Regarding the calculation of ΔT0, based on the assumption that the water temperature change cannot exceed 0.3℃ when reaching the target temperature, the water temperature change rate ΔT0 = (7-6.7) / 20 = 0.015℃ / s. Since ΔT > ΔT0, the unit's current operating load will be reduced to 95% before further monitoring and calculations.

[0097] This embodiment addresses the challenges encountered during automatic unit operation, including startup loading time, load control, and energy efficiency control under different loads. It proposes three intelligent adaptive control schemes to comprehensively ensure intelligent loading time regulation, stable load output, and energy-efficient operation across all load conditions throughout the entire unit's operation. This embodiment intelligently adjusts unit loading control parameters to meet different rapid loading time requirements; it continuously adjusts the opening of the system's electronic expansion valve based on the current operating status to meet the unit's energy efficiency requirements under different operating conditions, achieving efficient and stable unit operation; and it promptly adjusts the water temperature change rate during unit operation, improving the unit's water temperature stability. Example 2

[0098] Corresponding to Figure 1 The unit load control method described herein is illustrated in this embodiment, which provides a unit load control device, such as... Figure 6 The diagram shown is a structural block diagram of the unit load control device, which includes:

[0099] The first adjustment module 10 is used to determine, after the unit starts up, whether the total time required for the unit to run from startup to full load frequency meets the preset time requirement based on the actual operating frequency and loading parameters of the unit. If it does not meet the preset time requirement, the loading parameters are adjusted.

[0100] The second adjustment module 20 is used to detect the rate of change of the chilled water outlet temperature of the unit, and to determine whether the unit's operating status meets the preset water temperature change requirements based on the rate of change of the water temperature. If not, the rate of change of the water temperature is adjusted.

[0101] The above-mentioned device also includes:

[0102] The third adjustment module 30 is used to obtain the unit's COP and determine whether the unit's COP meets the preset performance requirements. If it does not meet the requirements, the opening of the unit's electronic expansion valve is adjusted. If the opening of the electronic expansion valve is reduced, the adjustment is continued or stopped based on the change in evaporation temperature.

[0103] The first adjustment module 10 starts performing its operation from the start of the unit, the second adjustment module 20 starts performing its operation when the temperature difference between the chilled water outlet temperature and the preset water temperature of the unit is within the preset range, and the third adjustment module 30 can perform its operation during the start-up and operation of the unit.

[0104] This embodiment also provides an air conditioning device, wherein the air conditioning device includes the unit load control device described above. Example 3

[0105] This embodiment provides an electronic device for a unit load control method. The electronic device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein...

[0106] The memory stores instructions executable by the processor, which are then executed by the at least one processor to enable the at least one processor to: after the unit starts up, determine whether the total time required for the unit to reach full load frequency from startup meets the preset time requirement based on the actual operating frequency and loading parameters of the unit; if not, adjust the loading parameters; obtain the unit's COP and determine whether the unit's COP meets the preset performance requirements; if not, adjust the opening of the unit's electronic expansion valve; if the opening of the electronic expansion valve is reduced, determine whether to continue adjusting or stop adjusting based on the change in evaporation temperature. Example 4

[0107] This invention provides software for executing the technical solutions described in the above embodiments and preferred embodiments.

[0108] This invention provides a non-volatile computer storage medium storing computer-executable instructions that can execute the unit load control method in any of the above method embodiments.

[0109] The aforementioned storage medium stores the aforementioned software, and the storage medium includes, but is not limited to, optical discs, floppy disks, hard disks, and rewritable memory.

[0110] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0111] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0112] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0113] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0114] The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0115] The electronic devices of this invention exist in various forms, including but not limited to:

[0116] (1) Mobile communication devices: These devices are characterized by their mobile communication capabilities and primarily aim to provide voice and data communication. These terminals include: smartphones (e.g., iPhones), multimedia phones, feature phones, and low-end phones, etc.

[0117] (2) Ultra-mobile personal computer devices: These devices fall under the category of personal computers, possessing computing and processing capabilities, and generally also have mobile internet access features. These terminals include PDAs, MIDs, and UMPCs, such as the iPad.

[0118] (3) Portable entertainment devices: These devices can display and play multimedia content. This category includes audio and video players (such as iPods), handheld game consoles, e-book readers, as well as smart toys and portable car navigation devices.

[0119] (4) Server: A device that provides computing services. The components of a server include a processor, hard disk, memory, device bus, etc. Servers are similar to general computer architectures, but because they need to provide highly reliable services, they have higher requirements in terms of processing power, stability, reliability, security, scalability, and manageability.

[0120] (5) Other electronic devices with data interaction functions, such as televisions and in-vehicle screens.

[0121] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0122] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, 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 can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for regulating unit load, characterized in that, The method includes: After the unit starts up, based on the actual operating frequency and loading parameters of the unit, the computer determines whether the total time required for the unit to run from startup to full load frequency meets the preset time requirement. If it does not meet the requirement, the loading parameters are adjusted. The loading parameters include the loading frequency and the loading cycle. Obtain the unit's COP and determine whether the unit's COP meets the preset performance requirements; if it does not meet the requirements, adjust the opening of the unit's electronic expansion valve according to the temperature difference at the evaporator end; if the opening of the electronic expansion valve is reduced, determine whether to continue adjusting or stop adjusting based on the change in evaporation temperature.

2. The method according to claim 1, characterized in that, Determining whether the total duration meets the preset time requirement includes: Determine whether the total duration is less than or equal to a preset time. If yes, determine that the total duration meets the preset time requirement; otherwise, determine that the total duration does not meet the preset time requirement.

3. The method according to claim 1, characterized in that, Based on the actual operating frequency and load parameters of the unit, the total time required for the computer group to go from startup to full load frequency includes: Based on the actual operating frequency and loading parameters of the unit, the time T1 required for the computer group to operate from the actual operating frequency to the full load frequency; Add the time T1 to the time T2 from unit startup to the actual operating frequency to obtain the total duration.

4. The method according to claim 3, characterized in that, Based on the actual operating frequency and load parameters of the unit, the time T1 required for the computer unit to operate from the actual operating frequency to the full load frequency is calculated using the following formula: T1 = a * (Q0 - Q1) / V1; V1 = f1 / t1; The loading parameters include loading frequency and loading cycle, where f1 is the loading frequency, t1 is the loading cycle, V1 is the loading rate, a is the proportional coefficient, Q0 is the full load frequency, and Q1 is the actual operating frequency.

5. The method according to claim 1, characterized in that, If it does not meet the requirements, adjust the loading parameters, including: If the total duration does not meet the preset time requirement, the loading frequency is increased and / or the loading cycle is decreased.

6. The method according to claim 1, characterized in that, Determining whether the unit's COP meets preset performance requirements includes: Calculate the deviation between the unit's COP and the preset COP; Determine whether the deviation value is within a preset range. If it is, determine that the unit COP meets the preset performance requirements. If not, determine that the unit COP does not meet the preset performance requirements.

7. The method according to claim 1, characterized in that, If not, adjust the opening of the unit's electronic expansion valve according to the temperature difference at the evaporator end, including: Obtain the evaporator end temperature difference; wherein, the evaporator end temperature difference is the difference between the chilled water outlet temperature and the evaporation temperature; Adjust the opening of the electronic expansion valve according to whether the temperature difference at the evaporator end is within a preset reasonable range.

8. The method according to claim 7, characterized in that, Adjusting the opening of the electronic expansion valve according to whether the temperature difference at the evaporator end is within a preset reasonable range includes: If the temperature difference at the evaporator end is within a preset reasonable range, then reduce the opening of the electronic expansion valve; If the temperature difference at the evaporator end is not within the preset reasonable range, the opening of the electronic expansion valve is increased.

9. The method according to claim 1, characterized in that, If the opening of the electronic expansion valve is reduced, the decision to continue or stop adjusting is made based on the change in the evaporation temperature, including: During the process of reducing the opening of the electronic expansion valve, the evaporation temperature is checked for any change. If the evaporation temperature decreases and the decrease exceeds a preset value, the adjustment is stopped, and the current opening of the electronic expansion valve is maintained. Otherwise, continue to reduce the opening of the electronic expansion valve.

10. The method according to claim 1, characterized in that, The method further includes: The rate of change of chilled water temperature at the unit's outlet temperature; The system determines whether the unit's operating status meets the preset water temperature change requirements based on the water temperature change rate. If not, the water temperature change rate is adjusted.

11. The method according to claim 10, characterized in that, The rate of change of chilled water temperature at the unit's outlet temperature includes: The detection cycle is initiated when the temperature difference between the chilled water outlet temperature and the preset water temperature of the unit is within the preset range; The rate of change of the chilled water outlet temperature of the computer group is based on the water temperature at the beginning and end of the detection cycle.

12. The method according to claim 11, characterized in that, Determining whether the unit's operating status meets the preset water temperature change requirements based on the water temperature change rate includes: The preset water temperature change rate is calculated based on the detection cycle; wherein, the preset water temperature change rate ΔT0 = b / detection cycle, and b is a preset difference; Determine whether the rate of change of the chilled water outlet temperature is less than or equal to the preset rate of change of the water temperature. If yes, determine that the rate of change of the water temperature meets the preset water temperature change requirement; otherwise, determine that the rate of change of the water temperature does not meet the preset water temperature change requirement.

13. The method according to claim 10, characterized in that, If the conditions are not met, adjust the water temperature change rate, including: If the requirements are not met, the operating frequency of the unit is reduced to adjust the water temperature change rate.

14. A unit load control device, characterized in that, The device includes: The first adjustment module is used to determine, after the unit starts up, whether the total time required for the computer group to run from startup to full load frequency meets the preset time requirement based on the actual operating frequency and loading parameters of the unit. If it does not meet the requirement, the loading parameters are adjusted. The loading parameters include loading frequency and loading cycle. The second adjustment module is used to obtain the unit's COP and determine whether the unit's COP meets the preset performance requirements. If it does not meet the requirements, the opening of the unit's electronic expansion valve is adjusted according to the temperature difference at the evaporator end. If the opening of the electronic expansion valve is reduced, the adjustment is continued or stopped according to the change in evaporation temperature.

15. The apparatus according to claim 14, characterized in that, The device further includes: The third adjustment module is used to detect the rate of change of the chilled water outlet temperature of the unit; based on the rate of change of the water temperature, it determines whether the unit's operating status meets the preset water temperature change requirements; if not, it adjusts the rate of change of the water temperature.

16. An air conditioning device, characterized in that, The air conditioning equipment includes the unit load control device as described in claim 14 or 15.

17. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1 to 13.

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