Condensing unit control method and device

Abstract

The invention relates to a condensing unit control method and device. The method comprises the steps that the target refrigeration duration of a target condensing unit set in a target refrigeration period and the target number corresponding to the target condensing unit set are obtained; according to the target refrigeration duration and the target number, the current number of the condensing units used in the current refrigeration period is determined; according to the current number, a current condensing unit set is determined in condensing units to be used; and the condensing units in the current condensing unit set are controlled to operate. By obtaining the actual refrigeration duration and the corresponding unit number of the last refrigeration period, the current load state of the refrigeration house can be precisely reversely deduced, the unit operation number of the current refrigeration period is dynamically adjusted, the operation number of the condensing units is highly matched with the real-time refrigeration requirement, and the refrigeration efficiency is improved. The problem that the output cooling capacity far exceeds the actual refrigeration requirement due to manual grouping is avoided, invalid energy consumption is reduced, and the comprehensive energy consumption of the refrigeration house refrigeration system is remarkably reduced.

Description

Technical Field

[0001] This application relates to the field of condensing unit control, and more particularly to a condensing unit control method and apparatus. Background Technology

[0002] Cold storage facilities, as core infrastructure for low-temperature warehousing, typically require multiple condensing units to meet the refrigeration demands of large spaces and high loads, ensuring a consistently stable temperature within a set range. To achieve coordinated operation of these units, technicians can manually divide all condensing units into any number of groups based on site conditions such as the actual refrigeration load, cargo storage volume, and regional differences in refrigeration needs. After grouping, the control system can perform targeted control on each group of condensing units according to preset control logic. However, because the manual grouping of condensing units heavily relies on the experience and judgment of technicians, they often struggle to accurately grasp dynamic load changes in the cold storage and the differences in operating characteristics of each condensing unit. This often results in the unit's output cooling capacity far exceeding the actual refrigeration demand, leading to persistently high energy consumption in the refrigeration system. Summary of the Invention

[0003] This application provides a condensing unit control method and device. This method can avoid the problem that the output cooling capacity far exceeds the actual cooling demand due to manual grouping, reduce ineffective energy consumption, and significantly reduce the overall energy consumption of the cold storage refrigeration system.

[0004] In a first aspect, this application provides a condensing unit control method, the method comprising: Obtain the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set; Based on the target cooling duration and the target number, determine the current number of condensing units used in the current cooling cycle; Based on the current number, determine the current set of condensing units among the condensing units to be used; Control the operation of the condensing units in the current condensing unit set.

[0005] Optionally, determining the current number of condensing units used in the current cooling cycle based on the target cooling duration and the target number includes: When the target cooling duration and the preset cooling duration meet the first preset condition, the target number is determined as the current number; When the target cooling duration and the preset cooling duration meet the second preset condition, the target number is adjusted downward using a number adjustment strategy to obtain the current number. When the target cooling duration and the preset cooling duration meet a third preset condition, the historical number used in the previous cooling cycle of the target cooling cycle is obtained, and the current number is determined based on the historical number and the target number.

[0006] Optionally, determining the current set of condensing units from the condensing units to be used based on the current number includes: Based on the condensing units to be used, determine a reference set of condensing units corresponding to the current number; For each set of reference condensing units, the temperature fluctuation range corresponding to the set of reference condensing units is determined based on the cold storage temperature and the temperature sensor temperature of each condensing unit in the set. Based on the temperature fluctuation range corresponding to each set of reference condensing units, determine the main condensing unit set and the backup condensing unit set among all the sets of reference condensing units; The current condenser unit set is determined based on the main condenser unit set and the backup condenser unit set.

[0007] Optionally, determining the primary condensing unit set and the backup condensing unit set from all reference condensing unit sets based on the temperature fluctuation range corresponding to each reference condensing unit set includes: For each set of reference condensing units, the target score for the set of reference condensing units is determined based on the temperature fluctuation range of the storage room corresponding to the set of reference condensing units and the temperature of the sensing bulb corresponding to each condensing unit in the set of reference condensing units. Based on the target score corresponding to each set of reference condensing units, the main set of condensing units and the backup set of condensing units are determined among all sets of reference condensing units.

[0008] Optionally, when the target number and the current number are the same, determining the current condenser unit set based on the main condenser unit set and the backup condenser unit set includes: Obtain the number of times the target condensing unit set has been used continuously and the corresponding fourth preset condition; When the number of refrigeration cycles meets the fourth preset condition, the current condenser unit set is determined based on the target condenser unit set, the main condenser unit set, and the backup condenser unit set. When the number of refrigeration cycles does not meet the fourth preset condition, the target condensing unit set is determined as the current condensing unit set.

[0009] Optionally, the step of using a number adjustment strategy to reduce the target number to obtain the current number includes: The reduction range is determined based on the total number of condensing units to be used and the target ratio, wherein the target ratio is a preset ratio or a ratio determined based on the target cooling time and the preset cooling time. Based on the stated reduction amount, the target number is reduced to obtain the current number.

[0010] Optionally, the method further includes: Obtain the operating status indicators for each condensing unit; The alarm condensing units are determined based on the operating status indicators of each condensing unit; The condensing units other than the alarm condensing unit are identified as condensing units to be used.

[0011] Secondly, this application provides a condensing unit control device, the device comprising: The acquisition unit is used to acquire the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set; The first determining unit is used to determine the current number of condensing units used in the current cooling cycle based on the target cooling duration and the target number. The second determining unit is used to determine the current set of condensing units among the condensing units to be used, based on the current number. The control unit is used to control the operation of the condensing units in the current condensing unit set.

[0012] Optionally, the first determining unit is configured to: When the target cooling duration and the preset cooling duration meet the first preset condition, the target number is determined as the current number; When the target cooling duration and the preset cooling duration meet the second preset condition, the target number is adjusted downward using a number adjustment strategy to obtain the current number. When the target cooling duration and the preset cooling duration meet a third preset condition, the historical number used in the previous cooling cycle of the target cooling cycle is obtained, and the current number is determined based on the historical number and the target number.

[0013] Optionally, the second determining unit is used for: Based on the condensing units to be used, determine a reference set of condensing units corresponding to the current number; For each set of reference condensing units, the temperature fluctuation range corresponding to the set of reference condensing units is determined based on the cold storage temperature and the temperature sensor temperature of each condensing unit in the set. Based on the temperature fluctuation range corresponding to each set of reference condensing units, determine the main condensing unit set and the backup condensing unit set among all the sets of reference condensing units; The current condenser unit set is determined based on the main condenser unit set and the backup condenser unit set.

[0014] Optionally, the second determining unit is used for: For each set of reference condensing units, the target score for the set of reference condensing units is determined based on the temperature fluctuation range of the storage room corresponding to the set of reference condensing units and the temperature of the sensing bulb corresponding to each condensing unit in the set of reference condensing units. Based on the target score corresponding to each set of reference condensing units, the main set of condensing units and the backup set of condensing units are determined among all sets of reference condensing units.

[0015] Optionally, when the target number and the current number are the same, the second determining unit is configured to: Obtain the number of times the target condensing unit set has been used continuously and the corresponding fourth preset condition; When the number of refrigeration cycles meets the fourth preset condition, the current condenser unit set is determined based on the target condenser unit set, the main condenser unit set, and the backup condenser unit set. When the number of refrigeration cycles does not meet the fourth preset condition, the target condensing unit set is determined as the current condensing unit set.

[0016] Optionally, the first determining unit is configured to: The reduction range is determined based on the total number of condensing units to be used and the target ratio, wherein the target ratio is a preset ratio or a ratio determined based on the target cooling time and the preset cooling time. Based on the stated reduction amount, the target number is reduced to obtain the current number.

[0017] Optionally, the apparatus further includes a third determining unit, the third determining unit being configured to: Obtain the operating status indicators for each condensing unit; The alarm condensing units are determined based on the operating status indicators of each condensing unit; The condensing units other than the alarm condensing unit are identified as condensing units to be used.

[0018] Thirdly, this application provides a condensing unit control system, which executes the above-described condensing unit control method to control the operation of the condensing unit in the cold storage.

[0019] Fourthly, this application provides an air conditioner, characterized in that the air conditioner controls the operation of the condenser unit in the cold storage by executing the condenser unit control method described above.

[0020] Fifthly, this application provides an electronic device, including: a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; the memory is used to store a computer program; and the processor is used to implement the above-described condensing unit control method when executing the computer program.

[0021] Sixthly, this application provides a storage medium storing a computer program thereon, characterized in that the computer program, when executed by a processor, implements the above-described condenser unit control method.

[0022] Compared with the prior art, the technical solution provided in this application has the following advantages: In this application embodiment, the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set are obtained; based on the target cooling duration and the target number, the current number of condensing units used in the current cooling cycle is determined; based on the current number, the current condensing unit set is determined among the condensing units to be used; and the operation of the condensing units in the current condensing unit set is controlled. It can be seen that by obtaining the actual cooling duration and corresponding number of units in the previous cooling cycle, this application can accurately infer the current load state of the cold storage and dynamically adjust the number of units operating in the current cooling cycle, so that the number of operating condensing units is highly matched with the real-time cooling demand, avoiding the problem of output cooling capacity far exceeding the actual cooling demand due to manual grouping, reducing ineffective energy consumption, and significantly reducing the overall energy consumption of the cold storage refrigeration system. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0026] Figure 1 A schematic flowchart illustrating a condensing unit control method provided in an embodiment of this application; Figure 2 A flowchart illustrating a method for determining the current number provided in an embodiment of this application; Figure 3 A flowchart illustrating a method for determining a current set of condensing units, provided as an embodiment of this application; Figure 4 A flowchart illustrating yet another method for determining a set of current condensing units provided in this application embodiment; Figure 5 This is a schematic diagram of a condensing unit control device provided in an embodiment of this application; Figure 6 This is a schematic diagram of a condensing unit control device provided in an embodiment of this application. Detailed Implementation

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

[0028] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0029] Cold storage facilities, as core infrastructure for low-temperature warehousing, typically require multiple condensing units to meet the refrigeration demands of large spaces and high loads, ensuring a consistently stable temperature within a set range. To achieve coordinated operation of these units, technicians can manually divide all condensing units into any number of groups based on site conditions such as the actual refrigeration load, cargo storage volume, and regional differences in refrigeration needs. After grouping, the control system can perform targeted control on each group of condensing units according to preset control logic. However, because the manual grouping of condensing units heavily relies on the experience and judgment of technicians, they often struggle to accurately grasp dynamic load changes in the cold storage and the differences in operating characteristics of each condensing unit. This often results in the unit's output cooling capacity far exceeding the actual refrigeration demand, leading to persistently high energy consumption in the refrigeration system.

[0030] To address the aforementioned issues, this application provides a condensing unit control method. This method, by acquiring the actual cooling duration and corresponding number of units from the previous cooling cycle, can accurately deduce the current load status of the cold storage and dynamically adjust the number of units operating in the current cooling cycle. This ensures a high degree of match between the number of operating condensing units and real-time cooling demand, avoiding the problem of output cooling capacity far exceeding actual cooling demand due to manual grouping. This reduces ineffective energy consumption and significantly lowers the overall energy consumption of the cold storage refrigeration system. Specifically, as follows... Figure 1 As shown, the specific steps include: Step 101: Obtain the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set.

[0031] The target cooling cycle is the previous cooling cycle of the current cooling cycle. To ensure sufficient cooling, the target cooling duration is the longest cooling duration corresponding to the condensing units in the target condensing unit set. For example, the target condensing unit set includes condensing unit A, condensing unit B, and condensing unit C, where condensing unit A has a duration of 3 minutes, condensing unit B has a duration of 4 minutes, and condensing unit C has a duration of 2 minutes. Therefore, the target cooling duration for the target condensing unit set is the longest cooling duration among these durations, i.e., the target cooling duration is 4 minutes.

[0032] In this step, when refrigeration of the cold storage is required, the condensing units are started. In the first refrigeration cycle, all condensing units are started and used for refrigeration. Then, the second refrigeration cycle is taken as the current refrigeration cycle, and the first refrigeration cycle becomes the target refrigeration cycle. The condensing units used in the target refrigeration cycle are identified and grouped into a target condensing unit set. Since all condensing units are started in the first refrigeration cycle, the target condensing unit set includes all condensing units. Next, the refrigeration duration of the target condensing unit set is obtained; this duration is the target refrigeration duration. The number of condensing units in the target condensing unit set is determined and taken as the target number.

[0033] Step 102: Determine the current number of condensing units to be used in the current cooling cycle based on the target cooling duration and target number.

[0034] In this step, the target number is adjusted downwards only when the cooling duration of the previous cooling cycle is less than the optimal cooling duration, resulting in the current number. For this method, the number adjusted each time needs to be relatively small to avoid over-adjustment. Of course, other adjustment methods can also be used. For example, when the cooling duration of the condensing units in the previous cooling cycle is much longer than the optimal cooling duration, it indicates that the cooling capacity output of the condensing units is less than the cooling capacity requirement of the cold storage, requiring more condensing units for cooling; when the cooling duration of the previous cooling cycle is about the same as the optimal cooling duration, it indicates that the cooling capacity output of the condensing units just meets the cooling capacity requirement of the cold storage, and no adjustment of the condensing units is needed; when the cooling duration of the previous cooling cycle is much shorter than the optimal cooling duration, it indicates that the cooling capacity output of the condensing units is greater than the cooling capacity requirement of the cold storage, reducing the number of condensing units.

[0035] Step 103: Based on the current number, determine the current set of condensing units among the condensing units to be used.

[0036] The number of condensing units in the current condensing unit set is equal to the current number. For example, if the current number is 3, then the current condensing unit set includes 3 condensing units.

[0037] In this step, the refrigeration system can directly determine the current number of condensing units among those to be used and form these condensing units into the current condensing unit set. Alternatively, based on the condensing units to be used, multiple reference condensing unit sets can be determined, with each reference set containing the same number of condensing units as the current number. Then, the performance of the condensing units in these reference sets is analyzed, and the reference set with the best performance is selected as the current condensing unit set.

[0038] Step 104: Control the operation of the condensing units in the current condensing unit set.

[0039] In this step, the condenser units in the current condenser unit set are used to operate so that the condenser units can perform refrigeration.

[0040] In this embodiment, the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set are obtained; based on the target cooling duration and the target number, the current number of condensing units used in the current cooling cycle is determined; based on the current number, the current condensing unit set is determined from the condensing units to be used; and the operation of the condensing units in the current condensing unit set is controlled. It can be seen that by obtaining the actual cooling duration and corresponding number of units in the previous cooling cycle, this application can accurately infer the current load state of the cold storage and dynamically adjust the number of units operating in the current cooling cycle, ensuring a high degree of match between the number of operating condensing units and real-time cooling demand. This avoids the problem of output cooling capacity far exceeding actual cooling demand due to manual grouping, reduces ineffective energy consumption, and significantly lowers the overall energy consumption of the cold storage refrigeration system.

[0041] In this embodiment, an optimal cooling duration can be set for each condensing unit. When the cooling duration of the condensing unit in the previous cooling cycle is significantly longer than the optimal cooling duration, it indicates that the cooling capacity output by the condensing unit is less than the cold storage's cooling capacity requirement, necessitating the use of more condensing units. When the cooling duration of the previous cooling cycle is approximately equal to the optimal cooling duration, it indicates that the cooling capacity output by the condensing unit precisely meets the cold storage's cooling capacity requirement, requiring no adjustment of the condensing units. When the cooling duration of the previous cooling cycle is significantly shorter than the optimal cooling duration, it indicates that the cooling capacity output by the condensing unit exceeds the cold storage's cooling capacity requirement, reducing the number of condensing units. This differentiated adjustment logic for different scenarios avoids both blind adjustments leading to cooling interruptions or efficiency reductions and unnecessary energy consumption caused by an excess of units when the load decreases. Therefore, this embodiment provides a method for determining the current number of units, with specific steps as follows: Figure 2 As shown, the specific steps include: Step 201: When the target cooling time and the preset cooling time meet the first preset condition, the target number is determined as the current number.

[0042] The preset cooling time is the optimal cooling time, which is set based on scenario parameters such as the actual volume of the cold storage, the number of units configured, and the target storage temperature. The first preset condition is that the difference between the target cooling time and the preset cooling time is less than a preset threshold, which is set based on experience.

[0043] In this step, the refrigeration system obtains the target cooling duration of the target condenser unit set in the previous cooling cycle and calculates the difference between the target cooling duration and the optimal cooling duration. When the difference is less than the preset threshold, it means that the cooling capacity output by the condenser unit just meets the cooling capacity requirement of the cold storage, and there is no need to adjust the number of condenser units. Therefore, the target number can be determined as the current number.

[0044] Step 202: When the target cooling time and the preset cooling time meet the second preset condition, the target number is adjusted downward using the number adjustment strategy to obtain the current number.

[0045] The second preset condition is that the difference between the target cooling time and the preset cooling time is not less than a preset threshold, and the target cooling time is less than the preset cooling time.

[0046] In this step, when the target cooling duration and the preset cooling duration meet the second preset condition, it means that when the cooling duration of the previous cooling cycle is much shorter than the optimal cooling duration, the cooling capacity output by the condensing unit is greater than the cooling capacity requirement of the cold storage. Therefore, the number of condensing units is reduced. Thus, the target number is adjusted downward using the number adjustment strategy to obtain the current number.

[0047] The aforementioned adjustment strategy can be to lower a preset value each time, or to determine the reduction range based on the total number of condensing units to be used and the target ratio, and then reduce the number accordingly. The target ratio can be a preset value, such as 10%, or it can be obtained based on some calculation.

[0048] Step 203: When the target cooling duration and the preset cooling duration meet the third preset condition, obtain the historical number used in the previous cooling cycle of the target cooling cycle, and determine the current number based on the historical number and the target number.

[0049] The third preset condition is that the difference between the target cooling time and the preset cooling time is not less than the preset threshold, and the target cooling time is greater than the preset cooling time.

[0050] In this step, when the target cooling duration and the preset cooling duration meet the third preset condition, it means that the cooling duration of the condensing unit in the previous cooling cycle is much longer than the optimal cooling duration. In other words, the cooling capacity output by the condensing unit is less than the cooling capacity requirement of the cold storage, and more condensing units are needed for cooling. However, it cannot be adjusted too much. The historical number used in the previous cooling cycle of the target cooling cycle can be obtained. This historical number is the upper limit of adjustment, and the target number is the lower limit of adjustment. Then, the current number is determined between the two.

[0051] In this embodiment of the application, the reduction range is calculated based on the total number of condensing units to be used and the target ratio. The target number is then reduced based on this reduction range to finally determine the number of units operating in the current cooling cycle, thereby achieving accurate adjustment of the number of units. The specific steps include: determining the reduction range based on the total number of condensing units to be used and the target ratio; and reducing the target number based on the reduction range to obtain the current number.

[0052] The target ratio can be a preset ratio, which is set by technicians based on experience; or it can be a ratio determined based on the target cooling time and the preset cooling time. For example, the ratio between the target cooling time and the preset cooling time can be determined, and the target ratio can be obtained by subtracting the ratio from 1.

[0053] In this embodiment, firstly, based on the number of condensing units to be used and the number of units required for the current refrigeration cycle, a set of all reference condensing units meeting the required number is generated. Secondly, for each set of reference condensing units, the temperature fluctuation range during operation is calculated by combining the real-time cold storage temperature with the temperature sensor temperature of each condensing unit within the set, thereby quantitatively evaluating its refrigeration stability. Next, using the temperature fluctuation range as a screening criterion, the set of primary condensing units with the smallest temperature fluctuation and the set of backup condensing units associated with the primary condensing unit set are determined from all reference condensing unit sets. Finally, the current condensing unit set is selected from the primary and backup condensing unit sets to achieve dynamic optimization of unit operation. Therefore, this embodiment provides a method for determining the current condensing unit set, such as... Figure 3 As shown, the specific steps include: Step 301: Determine the reference condensing unit set corresponding to the current number based on the condensing units to be used.

[0054] The reference condenser unit set includes the current number of condenser units.

[0055] In this step, a set of all reference condensing units that meet the required number of units is generated, based on the condensing units to be used and the number of units required to operate in the current cooling cycle.

[0056] For example, when the condensing units to be used are condensing unit A, condensing unit B, condensing unit C and condensing unit D, the reference set of condensing units includes (condensing unit A, condensing unit B), (condensing unit B, condensing unit C), (condensing unit C, condensing unit D) and (condensing unit A, condensing unit D).

[0057] Step 302: For each set of reference condensing units, determine the temperature fluctuation range corresponding to the set of reference condensing units based on the cold storage temperature and the temperature sensor temperature of each condensing unit in the set.

[0058] Temperature sensors are installed at the air outlets of each condenser unit. The temperature fluctuation range is used to assess the refrigeration stability of the corresponding reference condenser unit set. For example, the smaller the temperature fluctuation range, the more stable the refrigeration effect of the corresponding reference condenser unit set; the larger the temperature fluctuation range, the less stable the refrigeration effect of the corresponding reference condenser unit set.

[0059] In this step, for each set of reference condenser units, the temperature of the sensing bulb and the cold storage temperature and the square difference corresponding to each condenser unit in the set are calculated. Then, the variance is calculated based on these square differences, which is the temperature fluctuation range corresponding to the set of reference condenser units.

[0060] Step 303: Based on the temperature fluctuation range of the storage room corresponding to each set of reference condensing units, determine the main condensing unit set and the backup condensing unit set among all the sets of reference condensing units.

[0061] The number of condensing units included in the main condensing unit set and the backup condensing unit set are the current numbers.

[0062] In this step, the set of reference condensing units with the smallest temperature fluctuation can be determined as the primary condensing unit set, and the set of reference condensing units with the second smallest temperature fluctuation can be determined as the backup condensing unit set. Alternatively, the set of reference condensing units with the smallest temperature fluctuation can be determined as the primary condensing unit set, and the set of reference condensing units that do not overlap with the primary condensing unit set can be determined as the backup condensing unit set. For example, the reference condensing unit set includes (condensing unit A, condensing unit B), (condensing unit B, condensing unit C), (condensing unit C, condensing unit D), and (condensing unit A, condensing unit D). If the primary condensing unit set is (condensing unit A, condensing unit B), then the set of reference condensing units that do not overlap with the primary condensing unit set is (condensing unit C, condensing unit D), that is, the backup condensing unit set is (condensing unit C, condensing unit D).

[0063] Step 304: Determine the current condensing unit set based on the main condensing unit set and the standby condensing unit set.

[0064] In this step, the current condensing unit set is selected from the main condensing unit set and the backup condensing unit set. For example, one condensing unit set is randomly selected from the two and determined as the current condensing unit set.

[0065] In this embodiment, the target score is calculated using both the temperature fluctuation amplitude and the temperature sensor temperature, enabling a quantitative evaluation of the refrigeration effect of the reference condensing unit set. This allows for the precise selection of the condensing unit set with the smallest temperature fluctuation and the most uniform temperature distribution as the set to be used. Compared to manual judgment, this method avoids subjective errors, ensuring that the temperature inside the cold storage remains within a stable and controllable range, effectively reducing the risk of spoilage and loss of goods due to temperature fluctuations. Therefore, this embodiment provides a method for determining a condensing unit set, with the following steps: For each reference condensing unit set, a target score is determined based on the temperature fluctuation amplitude corresponding to the reference condensing unit set and the temperature sensor temperature of each condensing unit in the reference condensing unit set; based on the target score corresponding to each reference condensing unit set, a main condensing unit set and a backup condensing unit set are determined from all reference condensing unit sets.

[0066] The smaller the target score, the better the overall performance of the corresponding condensing unit set; the larger the target score, the worse the overall performance of the corresponding condensing unit set.

[0067] The specific steps for determining the target score of the reference condensing unit set based on the temperature fluctuation range of the storage space corresponding to the reference condensing unit set and the temperature of the sensing bulb corresponding to each condensing unit in the reference condensing unit set are as follows: For each reference condensing unit, determine the target range of the temperature of the corresponding sensing bulb. When the target range is within the normal range, set its corresponding value as the first value. When the target range is within the abnormal range, set its corresponding value as the second value. The first value is less than the second value.

[0068] Next, the values ​​corresponding to each reference condensing unit in the reference condensing unit set are summed to obtain the comprehensive value for the reference condensing unit set. Alternatively, the average value corresponding to each reference condensing unit in the reference condensing unit set can be calculated and used as the comprehensive value for the reference condensing unit set. Other methods can also be used to determine the comprehensive value; this is not limited here.

[0069] After obtaining the comprehensive value corresponding to each set of reference condensing units, the comprehensive value and the temperature fluctuation range of the storage room are weighted and summed to obtain the target score corresponding to the set of reference condensing units.

[0070] Based on the target score corresponding to each set of reference condensing units, the steps for determining the primary condensing unit set and the backup condensing unit set among all sets of reference condensing units are as follows: The set of reference condensing units with the smallest target score can be determined as the primary condensing unit set, and the set with the second smallest target score can be determined as the backup condensing unit set. Alternatively, the set of reference condensing units with the smallest target score can be determined as the primary condensing unit set, and the set of reference condensing units that does not overlap with the primary condensing unit set can be determined as the backup condensing unit set.

[0071] In this embodiment, when the target number matches the current number, it indicates that the total refrigeration output of the condensing units has matched the actual cooling capacity demand of the cold storage, and there is no need to adjust the number of operating condensing units. However, if a certain set of condensing units is used consistently for a long period, the units within that set will operate under continuous high load, exacerbating component wear and increasing the probability of failure. Therefore, by controlling the alternating operation of the main condensing unit set and the standby condensing unit set, a balanced distribution of unit load can be achieved, avoiding excessive wear caused by the long-term continuous operation of a single unit, extending the overall service life of the equipment, and ensuring the continuous and stable operation of the refrigeration system. Therefore, this embodiment provides a method for determining the current condensing unit set, the specific steps of which are as follows: Figure 4 As shown, it includes: Step 401: Obtain the number of times the target condensing unit set has been used continuously and the corresponding fourth preset condition.

[0072] In this step, the number of times the target condensing unit set is used continuously is obtained, that is, the number of times the target condensing unit set is used in a cycle of alternating use of a main and backup set.

[0073] When the target condensing unit set is the primary condensing unit set, its fourth preset condition is that the number of cooling cycles equals the maximum number of cooling cycles allowed for continuous use of the primary condensing unit set within one alternating use cycle, or the ratio of the number of cooling cycles to the total number of cooling cycles equals the operating percentage of the primary condensing unit set. When the target condensing unit set is the standby condensing unit set, its fourth preset condition is that the number of cooling cycles equals the maximum number of cooling cycles allowed for continuous use of the standby condensing unit set within one alternating use cycle, or the ratio of the number of cooling cycles to the total number of cooling cycles equals the operating percentage of the standby condensing unit set. Here, the total number of cooling cycles refers to the total number of cooling cycles within one alternating use cycle of the primary and standby sets. The maximum number of cooling cycles corresponding to the primary / standby condensing unit set is equal to the product of the operating percentage of the primary / standby condensing unit set and the total number of cooling cycles. Because the condensing units in the primary condensing unit set have better performance, the operating percentage of the primary condensing unit set is higher than that of the standby condensing unit set.

[0074] Step 402: When the number of refrigeration cycles meets the fourth preset condition, determine the current condenser unit set based on the target condenser unit set, the main condenser unit set, and the standby condenser unit set.

[0075] In this step, when the number of refrigeration cycles meets the fourth preset condition, it indicates that the condenser unit set needs to be switched and the target condenser unit set needs to be switched. When the target condenser unit set is the main condenser unit set, the standby condenser unit set is determined as the current condenser unit set. When the target condenser unit set is the standby condenser unit set, the main condenser unit set is determined as the current condenser unit set.

[0076] Step 403: When the number of refrigeration cycles does not meet the fourth preset condition, the target condensing unit set is determined as the current condensing unit set.

[0077] In this step, if the number of refrigeration cycles does not meet the fourth preset condition, it means that there is no need to switch the condenser unit set and the target condenser unit set needs to continue to be used. Therefore, the target condenser unit set is determined as the current condenser unit set.

[0078] In this embodiment of the application, when the target number and the current number are inconsistent, it indicates that the cooling capacity output by the condensing unit and the cooling capacity demand of the cold storage have not yet matched. That is, the number of condensing units used still needs to be adjusted. At this time, since the condensing units in the main condensing unit have better performance, the main condensing unit set can be determined as the current condensing unit set so that the condensing units in the main condensing unit set can be used for cooling in the future.

[0079] In this embodiment, by collecting the operating status indicators of each condensing unit, alarming condensing units with abnormalities are identified, and units without abnormalities are determined as condensing units to be used. This provides a reliable basis for adjusting the number of units, grouping, and controlling operation in subsequent cooling cycles. Therefore, this embodiment provides a method for determining condensing units, the specific steps of which include: acquiring the operating status indicators of each condensing unit; determining alarming condensing units based on the operating status indicators of each condensing unit; and determining the condensing units other than the alarming condensing units as condensing units to be used.

[0080] Among them, the operating status indicators can be the working pressure of each condensing unit (such as high pressure / low pressure of the refrigeration circuit) and the operating temperature of the unit (such as compressor discharge temperature, evaporator surface temperature, and temperature of the temperature sensor bulb set at the air outlet), etc., which are used to detect whether the condensing unit is operating normally.

[0081] In this step, the operating status indicators of each condensing unit are obtained. Then, these operating status indicators are checked to see if they meet preset judgment conditions (e.g., the preset judgment conditions are that the pressure is not within the preset pressure range, the temperature is not within the preset temperature range, etc.). When these operating status indicators meet the preset judgment conditions, the corresponding condensing unit is identified as an alarm condensing unit. The condensing units other than the alarm condensing unit are identified as condensing units to be used.

[0082] like Figure 5 As shown in the figure, this application provides a condensing unit control device, the device comprising: The acquisition unit 501 is used to acquire the target cooling duration of the target condensing unit set in the previous cooling cycle and the target number corresponding to the target condensing unit set. The first determining unit 502 is used to determine the current number of condensing units used in the current cooling cycle based on the target cooling duration and the target number. The second determining unit 503 is used to determine the current set of condensing units among the condensing units to be used based on the current number. Control unit 504 is used to control the operation of the condensing units in the current condensing unit set.

[0083] Optionally, the first determining unit 502 is used to: When the target cooling duration and the preset cooling duration meet the first preset condition, the target number is determined as the current number; When the target cooling duration and the preset cooling duration meet the second preset condition, the target number is adjusted downward using a number adjustment strategy to obtain the current number. When the target cooling duration and the preset cooling duration meet a third preset condition, the historical number used in the previous cooling cycle of the target cooling cycle is obtained, and the current number is determined based on the historical number and the target number.

[0084] Optionally, the second determining unit 503 is used for: Based on the condensing units to be used, determine a reference set of condensing units corresponding to the current number; For each set of reference condensing units, the temperature fluctuation range corresponding to the set of reference condensing units is determined based on the cold storage temperature and the temperature sensor temperature of each condensing unit in the set. Based on the temperature fluctuation range corresponding to each set of reference condensing units, determine the main condensing unit set and the backup condensing unit set among all the sets of reference condensing units; The current condenser unit set is determined based on the main condenser unit set and the backup condenser unit set.

[0085] Optionally, the second determining unit 503 is used for: For each set of reference condensing units, the target score for the set of reference condensing units is determined based on the temperature fluctuation range of the storage room corresponding to the set of reference condensing units and the temperature of the sensing bulb corresponding to each condensing unit in the set of reference condensing units. Based on the target score corresponding to each set of reference condensing units, the main set of condensing units and the backup set of condensing units are determined among all sets of reference condensing units.

[0086] Optionally, when the target number and the current number are the same, the second determining unit 503 is used to: Obtain the number of times the target condensing unit set has been used continuously and the corresponding fourth preset condition; When the number of refrigeration cycles meets the fourth preset condition, the current condenser unit set is determined based on the target condenser unit set, the main condenser unit set, and the backup condenser unit set. When the number of refrigeration cycles does not meet the fourth preset condition, the target condensing unit set is determined as the current condensing unit set.

[0087] Optionally, the first determining unit 502 is used to: The reduction range is determined based on the total number of condensing units to be used and the target ratio, wherein the target ratio is a preset ratio or a ratio determined based on the target cooling time and the preset cooling time. Based on the stated reduction amount, the target number is reduced to obtain the current number.

[0088] Optionally, the device further includes a third determining unit 505, the third determining unit 505 being configured to: Obtain the operating status indicators for each condensing unit; The alarm condensing units are determined based on the operating status indicators of each condensing unit; The condensing units other than the alarm condensing unit are identified as condensing units to be used.

[0089] like Figure 6 As shown in the figure, this application provides an air conditioner control device, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604. The processor 601, communication interface 602, and memory 603 communicate with each other via the communication bus 604. Memory 603 is used to store computer programs; In one embodiment of this application, when the processor 601 executes the program stored in the memory 603, it implements the condenser unit control method provided in any of the foregoing method embodiments, including: Obtain the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set; Based on the target cooling duration and the target number, determine the current number of condensing units used in the current cooling cycle; Based on the current number, determine the current set of condensing units among the condensing units to be used; Control the operation of the condensing units in the current condensing unit set.

[0090] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the steps of the condenser unit control method provided in any of the foregoing method embodiments.

[0091] This application provides a condensing unit control system, which executes the above-described condensing unit control method to control the operation of the condensing unit in the cold storage.

[0092] This application provides an air conditioner that executes the above-described condenser unit control method to control the operation of the condenser unit in the cold storage.

[0093] 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.

[0094] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, 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.

[0095] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0096] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A control method for a condensing unit, characterized in that, The method includes: Obtain the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set; Based on the target cooling duration and the target number, determine the current number of condensing units used in the current cooling cycle; Based on the current number, determine the current set of condensing units among the condensing units to be used; Control the operation of the condensing units in the current condensing unit set.

2. The method according to claim 1, characterized in that, The step of determining the current number of condensing units used in the current cooling cycle based on the target cooling duration and the target number includes: When the target cooling duration and the preset cooling duration meet the first preset condition, the target number is determined as the current number; When the target cooling duration and the preset cooling duration meet the second preset condition, the target number is adjusted downward using a number adjustment strategy to obtain the current number. When the target cooling duration and the preset cooling duration meet a third preset condition, the historical number used in the previous cooling cycle of the target cooling cycle is obtained, and the current number is determined based on the historical number and the target number.

3. The method according to claim 1, characterized in that, The step of determining the current set of condensing units from the condensing units to be used based on the current number includes: Based on the condensing units to be used, determine a reference set of condensing units corresponding to the current number; For each set of reference condensing units, the temperature fluctuation range corresponding to the set of reference condensing units is determined based on the cold storage temperature and the temperature sensor temperature of each condensing unit in the set. Based on the temperature fluctuation range corresponding to each set of reference condensing units, determine the main condensing unit set and the backup condensing unit set among all the sets of reference condensing units; The current condenser unit set is determined based on the main condenser unit set and the backup condenser unit set.

4. The method according to claim 3, characterized in that, The step of determining the primary condensing unit set and the backup condensing unit set from all reference condensing unit sets based on the temperature fluctuation range corresponding to each reference condensing unit set includes: For each set of reference condensing units, the target score for the set of reference condensing units is determined based on the temperature fluctuation range of the storage room corresponding to the set of reference condensing units and the temperature of the sensing bulb corresponding to each condensing unit in the set of reference condensing units. Based on the target score corresponding to each set of reference condensing units, the main set of condensing units and the backup set of condensing units are determined among all sets of reference condensing units.

5. The method according to claim 3 or 4, characterized in that, When the target number and the current number are the same, determining the current condenser unit set based on the main condenser unit set and the backup condenser unit set includes: Obtain the number of times the target condensing unit set has been used continuously and the corresponding fourth preset condition; When the number of refrigeration cycles meets the fourth preset condition, the current condenser unit set is determined based on the target condenser unit set, the main condenser unit set, and the backup condenser unit set. When the number of refrigeration cycles does not meet the fourth preset condition, the target condensing unit set is determined as the current condensing unit set.

6. The method according to claim 2, characterized in that, The method of using a number adjustment strategy to reduce the target number to obtain the current number includes: The reduction range is determined based on the total number of condensing units to be used and the target ratio, wherein the target ratio is a preset ratio or a ratio determined based on the target cooling time and the preset cooling time. Based on the stated reduction amount, the target number is reduced to obtain the current number.

7. The method according to claim 1, characterized in that, The method further includes: Obtain the operating status indicators for each condensing unit; The alarm condensing units are determined based on the operating status indicators of each condensing unit; The condensing units other than the alarm condensing unit are identified as condensing units to be used.

8. A condensing unit control device, characterized in that, The device includes: The acquisition unit is used to acquire the target cooling duration of the target condensing unit set in the target cooling cycle and the target number corresponding to the target condensing unit set; The first determining unit is used to determine the current number of condensing units used in the current cooling cycle based on the target cooling duration and the target number. The second determining unit is used to determine the current set of condensing units among the condensing units to be used, based on the current number. The control unit is used to control the operation of the condensing units in the current condensing unit set.

9. A condensing unit control system, characterized in that, The system executes the condenser unit control method according to any one of claims 1-7 to control the operation of the condenser unit in the cold storage.

10. An air conditioner, characterized in that, The air conditioner controls the operation of the condenser unit in the cold storage using the condenser unit control method described in any one of claims 1-7.

11. An electronic device, characterized in that, include: The system includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other via the communication bus; the memory is used to store computer programs; and the processor is used to execute the computer programs to implement the condensing unit control method according to any one of claims 1-7.

12. A storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the condenser unit control method according to any one of claims 1-7.

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