Control method, device and equipment of heat pump project, and storage medium

Abstract

The application relates to the technical field of heat pump control, and discloses a control method, device and equipment of a heat pump project and a storage medium, which are used for improving the heating water efficiency of the heat pump project. The control method of the heat pump project comprises the following steps: obtaining an engineering demand value of a current period and a historical gear of a previous period, performing gear prediction on the current period based on the engineering demand value, and obtaining a candidate gear; comparing the candidate gear with the historical gear to obtain a target gear; and controlling the start or stop of a heat pump in the heat pump project based on the target gear.

Description

Technical Field

[0001] This application relates to the field of heat pump control technology, and in particular to a control method, device, equipment and storage medium for heat pump engineering. Background Technology

[0002] Traditional centralized control systems, the control equipment for heat pump projects, are designed to control the number of heat pumps started, thereby controlling the total output capacity of the hot water system. The centralized control system sets a target supply water temperature for each heat pump in the project. When each heat pump reaches its target supply water temperature, it shuts down. For example, if the hot water system requires a total supply water temperature of 50℃, the centralized control system will set multiple target supply water temperatures for the heat pumps, such as 51℃, 50℃, 49℃, and 48℃. When the total supply water temperature reaches 48℃, the centralized control system shuts down some of the heat pumps; when it reaches 49℃, it shuts down another portion. Thus, the closer the water temperature is to the total supply water temperature, the fewer heat pumps need to be started, effectively controlling the total output capacity of the hot water system.

[0003] The inventors realized that current hot water systems often shut down most of the heat pumps when the water temperature approaches the total supply temperature, resulting in the inability to reach the total supply temperature. This frequent failure to reach the total supply temperature leads to low hot water production efficiency in heat pump systems. Summary of the Invention

[0004] This application provides a control method, apparatus, equipment, and storage medium for heat pump engineering, used to improve the hot water production efficiency of heat pump engineering.

[0005] The first aspect of this application provides a control method for a heat pump project, comprising: obtaining the project demand value for the current cycle and the historical gear level for the previous cycle, and predicting the gear level for the current cycle based on the project demand value to obtain a candidate gear level; comparing the candidate gear level with the historical gear level to obtain a target gear level; and controlling the heat pump in the heat pump project to start or stop based on the target gear level.

[0006] A second aspect of this application provides a control device for a heat pump project, comprising: an acquisition and determination module, configured to acquire the project demand value for the current period and the historical gear level for the previous period, and to predict the gear level for the current period based on the project demand value to obtain a candidate gear level; a comparison module, configured to compare the candidate gear level with the historical gear level to obtain a target gear level; and a control module, configured to control the heat pump in the heat pump project to start or stop based on the target gear level.

[0007] A third aspect of this application provides a control device for a heat pump project, comprising: a memory and at least one processor, wherein the memory stores instructions; the at least one processor invokes the instructions in the memory to cause the control device for the heat pump project to execute the aforementioned control method for the heat pump project.

[0008] A fourth aspect of this application provides a computer-readable storage medium storing instructions that, when executed on a computer, cause the computer to perform the control method for the heat pump engineering described above.

[0009] The technical solution provided in this application obtains the engineering demand value of the current cycle and the historical gear level of the previous cycle, and predicts the gear level for the current cycle based on the engineering demand value to obtain candidate gear levels; compares the candidate gear levels with the historical gear levels to obtain the target gear level; and controls the heat pump in the heat pump project to start or stop based on the target gear level. In this embodiment, the gear level prediction based on the engineering demand value of the current cycle to obtain candidate gear levels, the comparison of the candidate gear levels with the historical gear levels of the previous cycle to obtain the target gear level, and the control of the heat pump in the heat pump project to start or stop based on the target gear level solves the problem that most of the heat pumps are shut down when the water temperature is close to the total supply water temperature, resulting in the inability to reach the total supply water temperature. This improves the success rate of reaching the total supply water temperature, thereby improving the hot water production efficiency of the heat pump project, and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of one embodiment of the control method for a heat pump project in this application.

[0011] Figure 2 This is a schematic diagram of another embodiment of the control method for a heat pump project in this application;

[0012] Figure 3 This is a schematic diagram of another embodiment of the control method for a heat pump project in this application;

[0013] Figure 4 This is a schematic diagram of another embodiment of the control method for a heat pump project in this application;

[0014] Figure 5 This is a schematic diagram of another embodiment of the control method for a heat pump project in this application;

[0015] Figure 6 This is a schematic diagram of one embodiment of the PID gear matching table in this application.

[0016] Figure 7 This is a schematic diagram of one embodiment of the control device for a heat pump system in this application.

[0017] Figure 8 This is a schematic diagram of another embodiment of the control device for a heat pump system in this application.

[0018] Figure 9 This is a schematic diagram of one embodiment of the control equipment for a heat pump project in this application. Detailed Implementation

[0019] This application provides a control method, apparatus, equipment, and storage medium for heat pump engineering, used to improve the hot water production efficiency of heat pump engineering.

[0020] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein. Furthermore, the terms “comprising” or “having,” and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] For ease of understanding, the specific process of the embodiments of this application is described below. Please refer to [link / reference]. Figure 1 One embodiment of the control method for a heat pump system in this application includes:

[0022] 101. Obtain the engineering demand value for the current period and the historical gearing levels for the previous period, and predict the gearing level for the current period based on the engineering demand value to obtain candidate gearing levels;

[0023] It is understood that the executing entity of this application can be a control device for a heat pump project, or it can be a control equipment for a heat pump project; no specific limitation is made here. This application's embodiments use a control equipment for a heat pump project as an example for illustration.

[0024] It is understandable that a heat pump project is a large-scale equipment project consisting of multiple heat pumps. For example, in engineering sites with centralized water supply or heating needs, such as large shopping malls, hospitals, and schools, a heat pump project is formed by multiple heat pump units.

[0025] It should be noted that the historical gears are used to indicate the number of heat pumps that were in operation in the previous cycle of the current cycle, while the candidate gears are used to indicate the number of heat pumps that will be in operation in the current cycle.

[0026] The control equipment of the heat pump project calculates the current cycle's engineering demand value by acquiring the set of water temperature parameters and the preset engineering demand formula. Based on the engineering demand value, it calls the preset gear model to predict the gear level, obtains the candidate gear level, and retrieves the historical gear level of the previous cycle.

[0027] 102. Compare the candidate gear positions with the historical gear positions to obtain the target gear position;

[0028] The control equipment of a heat pump project determines whether the current cycle has an increasing or decreasing trend in the gear level by comparing candidate gear levels with historical gear levels. For example, if the candidate gear level is greater than the historical gear level, it is determined that the current cycle has an increasing trend in the gear level; if the candidate gear level is less than the historical gear level, it is determined that the current cycle has a decreasing trend in the gear level.

[0029] It should be noted that the target level is used to indicate the total number of heat pumps that will be in operation in the heat pump project.

[0030] 103. Control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level.

[0031] The control equipment of a heat pump project compares the number of candidate heat pumps with the target gear to determine the number of heat pumps that need to be started or shut down in the current cycle of the heat pump project, and then controls the corresponding heat pumps to start or shut down.

[0032] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0033] Please see Figure 2 Another embodiment of the control method for heat pump engineering in this application includes:

[0034] 201. Obtain the water temperature parameter set, and perform calculations based on the water temperature parameter set and the preset engineering requirement formula to obtain the engineering requirement value for the current cycle, and obtain the historical gear of the previous cycle;

[0035] The water temperature parameter set includes the current water temperature of the current cycle, the target water temperature of the current cycle, and the temperature difference of the previous cycle.

[0036] The preset engineering requirement formula is: PIDsum=kp*Erro+I+kd*(Erro-Erro'), where PIDsum represents the engineering requirement value, I represents the periodic cumulative integral value of the temperature difference, I=I'+ki*Erro, kp, kd, and ki are constants, the initial value of I' is 0, and I' represents the I value obtained in the previous cycle. The specific cycle can be set according to the actual application scenario. As an example, not a limitation, the cycle can be 1 minute or 2 minutes, and Erro' represents the value of I obtained in the previous cycle. Erro, the specific value of kp can be set according to the actual application scenario. As an example, not a limitation, the value of kp can be 3, i.e., kp=3, or it can be 4, i.e., kp=4. The specific value of ki can be set according to the actual application scenario. As an example, not a limitation, the value of ki can be 0.5, i.e., ki=0.5, or it can be 0.6, i.e., ki=0.6. The specific value of kd can be set according to the actual application scenario. As an example, not a limitation, the value of kd can be 6, i.e., kd=6, or it can be 7, i.e., kd=7.

[0037] Erro represents the temperature difference between the current water temperature and the target water temperature. It should be noted that when the heat pump system uses the average inlet water temperature for control (i.e., when the heat pump system uses the average inlet water temperature for calculations), the current water temperature represents the current average inlet water temperature of the heat pump system, and the target water temperature represents the target inlet water temperature of the heat pump system, i.e., the total supply water temperature. The average inlet water temperature is the average of the inlet water temperatures of all heat pumps in the heat pump system. Similarly, when the heat pump system uses the average outlet water temperature for control (i.e., when the average outlet water temperature is used for calculations), the current water temperature represents the current average outlet water temperature of the heat pump system, and the target water temperature represents the target outlet water temperature of the heat pump system, i.e., the total supply water temperature. The average outlet water temperature is the average of the outlet water temperatures of all heat pumps in the heat pump system. When a heat pump project uses the inlet water temperature of the water tank for control, i.e., when the heat pump project uses the inlet water temperature of the water tank for calculation, the current water temperature is used to represent the inlet water temperature of the water tank, and the target water temperature is used to represent the target inlet water temperature of the water tank. When a heat pump project uses the outlet water temperature of the water tank for control, i.e., when the heat pump project uses the outlet water temperature of the water tank for calculation, the current water temperature is used to represent the outlet water temperature of the water tank, and the target water temperature is used to represent the target outlet water temperature of the water tank. Here, the inlet water temperature and outlet water temperature of the water tank can be the inlet water temperature and outlet water temperature of the inner sleeve of the water tank, or the inlet water temperature and outlet water temperature of the main pipe. The main pipe is the main pipe that connects all the sleeves, i.e., the water from all the sleeves is collected into the main pipe. They can also be the inlet water temperature and outlet water temperature of the water tank, which is not limited here.

[0038] For example, the control equipment of a heat pump project acquires a water temperature parameter set, wherein the water temperature parameter set includes the current water temperature and target water temperature of the current cycle, and the temperature difference of the previous cycle, and performs calculation based on the water temperature parameter set and the preset engineering requirement formula PIDsum=kp*Erro+I+kd*(Erro-Erro') to obtain that the engineering requirement value of the current cycle is 5, and acquires the historical gear of the previous cycle.

[0039] 202. Based on the engineering requirement value, call a preset gear model for gear prediction to obtain a candidate gear;

[0040] The specific preset gear model can be set according to actual application scenarios. By way of example and not limitation, the preset gear model may be a Decision Tree model or a Randomforest model.

[0041] For example, if the preset gear model is a decision tree model, the control equipment of the heat pump project calls the decision tree model to perform classification prediction, that is, gear prediction, based on the engineering requirement value. The decision tree model includes a plurality of preset numerical intervals, which are respectively: a first preset numerical interval, a second preset numerical interval, ..., an N-th preset numerical interval, each preset numerical interval corresponds to one preset gear, that is, the first preset numerical interval corresponds to a first preset gear, and the number of heat pumps corresponding to the first preset gear is 1; the second preset numerical interval corresponds to a second preset gear, and the number of heat pumps corresponding to the second preset gear is 2, and so on, which will not be repeated herein. It can be understood that the number of heat pumps corresponding to the N-th preset numerical interval is the total number of heat pumps in the heat pump project. The specific plurality of preset numerical intervals can be set according to actual application scenarios. By way of example and not limitation, the first preset numerical interval is 0<PIDsum<10, the second preset numerical interval is 10≤PIDsum<20, the third preset numerical interval is 20≤PIDsum<30, and so on, which will not be repeated herein. If the engineering requirement value of the current cycle is PIDsum=5, the control equipment of the heat pump project matches the engineering requirement value with the plurality of preset numerical intervals of the decision tree model to obtain the first preset numerical interval corresponding to the engineering requirement value, and determines the first preset gear corresponding to the first preset numerical interval as the candidate gear, wherein the number of heat pumps corresponding to the first preset gear is 1, that is, the number of heat pumps to be in an operating state in the current cycle is 1.

[0042] 203. Determine whether the candidate gear is greater than the historical gear, and acquire the average load ratio of the heat pump project and the type of the heat pump, wherein the type of the heat pump is fixed-frequency type or variable-frequency type;

[0043] The control equipment of a heat pump project determines whether the candidate gear level is greater than the historical gear level, thereby determining whether the current cycle has a trend of increasing or decreasing gear levels, and obtaining the average load ratio and heat pump type of the heat pump project.

[0044] The control equipment of a heat pump project acquires the operating load ratios of all heat pumps that are in normal communication, in operation, and whose operating load ratio is not 0%, and performs average processing to obtain the average load ratio of the heat pump project. It can be understood that when the number of heat pumps in operation in the heat pump project is 0, the average load ratio of the heat pump project is 0%.

[0045] For variable frequency heat pumps, the operating load ratio is the ratio between the current operating frequency and the current maximum operating frequency, or the ratio between the current operating PID setting and the current maximum PID setting. The current operating PID setting indicates the number of variable frequency heat pumps currently in operation, and the current maximum PID setting indicates the total number of variable frequency heat pumps in the heat pump project. For example, if the current operating frequency of the variable frequency heat pump is 40Hz and the current maximum operating frequency is 80Hz, the operating load ratio is 50%. If the current maximum operating frequency of the variable frequency heat pump is 0Hz, the operating load ratio is 100%.

[0046] For fixed-frequency heat pumps, the operating load ratio is the ratio between the number of currently operating compressors and the total number of compressors. For example, if a fixed-frequency heat pump has four compressors, then when one compressor is started, the operating load ratio is 25%.

[0047] 204. If the candidate level is greater than the historical level, the target level will be determined based on the average load ratio and the heat pump type.

[0048] Understandably, a candidate gear level higher than the historical gear level indicates a trend of increasing gear levels in the current cycle. If the current cycle shows a trend of increasing gear levels, the control equipment of the heat pump project will make further judgments based on the average load ratio and the heat pump type to determine the target gear level.

[0049] 205. If the candidate level is lower than the historical level, the target level will be determined based on the average load ratio and the heat pump type.

[0050] Understandably, a candidate gear level lower than the historical gear level indicates a trend of decreasing gear levels in the current cycle. If the current cycle shows a decreasing gear level trend, the control equipment of the heat pump project will make further judgments based on the average load ratio and heat pump type to determine the target gear level.

[0051] 206. If the candidate gear level is equal to the historical gear level, then the target gear level is determined based on the heat pump type;

[0052] Understandably, a candidate gear level equal to a historical gear level indicates that the gear level for the current cycle has not changed. If the gear level for the current cycle has not changed, the control equipment of the heat pump project will make further judgments based on the heat pump type to determine the target gear level.

[0053] 207. Obtain the number of candidate heat pumps. The number of candidate heat pumps is used to represent the number of heat pumps currently in operation in the heat pump project.

[0054] For example, the control equipment of a heat pump project obtains the number of candidate heat pumps. If the number of candidate heat pumps is 2, then there are 2 heat pumps running in the heat pump project.

[0055] 208. If the target gear is greater than the number of candidate heat pumps, calculate the difference between the target gear and the number of candidate heat pumps to obtain the first number of heat pumps, and control the start of the heat pumps of the first number of heat pumps in the heat pump project based on the first preset rule. The target gear is used to represent the total number of heat pumps corresponding to the heat pumps that will be in operation in the heat pump project.

[0056] The first preset rule is used to sort all the heat pumps that are not currently running in the heat pump project according to the order of their usage time from shortest to longest, so as to obtain the first heat pump sequence.

[0057] For example, based on the example in step 207, if the number of candidate heat pumps is 2, and the total number of heat pumps corresponding to the heat pumps in operation in the heat pump project is 3 (i.e., the target speed is greater than the number of candidate heat pumps), then the control equipment of the heat pump project calculates the difference between the target speed and the number of candidate heat pumps, obtaining a first heat pump number of 1, and controls the first heat pump in the first heat pump sequence corresponding to the heat pump project to start based on the first preset rule. If the total number of heat pumps corresponding to the heat pumps in operation in the heat pump project is 4, then the control equipment of the heat pump project calculates the difference between the target speed and the number of candidate heat pumps, obtaining a first heat pump number of 2, and controls the first and second heat pumps in the first heat pump sequence corresponding to the heat pump project to start based on the first preset rule.

[0058] 209. If the target gear is less than the number of candidate heat pumps, calculate the difference between the number of candidate heat pumps and the target gear to obtain the second number of heat pumps, and control the shutdown of the second number of heat pumps in the heat pump project based on the second preset rule.

[0059] The second preset rule is used to sort all the heat pumps in the heat pump project that are not currently running according to the order of their usage time from longest to shortest, thus obtaining the second heat pump sequence.

[0060] For example, if the number of candidate heat pumps is 3, and the total number of heat pumps in operation in the heat pump project is 2 (meaning the target speed is less than the number of candidate heat pumps), then the control equipment of the heat pump project calculates the difference between the number of candidate heat pumps and the target speed, obtaining a second heat pump number of 1, and controls the first heat pump in the second heat pump sequence corresponding to the heat pump project to shut down based on the second preset rule. If the total number of heat pumps in operation in the heat pump project is 1, then the control equipment of the heat pump project calculates the difference between the number of candidate heat pumps and the target speed, obtaining a second heat pump number of 2, and controls the first and second heat pumps in the second heat pump sequence corresponding to the heat pump project to shut down based on the second preset rule.

[0061] 210. If the target gear is equal to the number of candidate heat pumps, then continue to run the heat pumps corresponding to the number of candidate heat pumps.

[0062] For example, if the total number of heat pumps in operation in a heat pump project is the same as the number of heat pumps currently in operation, then the heat pumps corresponding to the candidate heat pumps will continue to operate. That is, the target gear for the current cycle is equal to the historical gear for the previous cycle. Here, I = I', where I represents the I value for the current cycle and I' represents the I value obtained in the previous cycle. The purpose of I = I' is to prevent I = I' + ki * Erro from accumulating in the current cycle if the gear does not change, thereby affecting the calculation of the project demand value for the next cycle.

[0063] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0064] Please see Figure 3 Another embodiment of the control method for heat pump engineering in this application includes:

[0065] 301. Obtain the engineering demand value for the current period and the historical gearing levels for the previous period, and predict the gearing level for the current period based on the engineering demand value to obtain candidate gearing levels.

[0066] The execution process of step 301 is the same as that of step 101, and will not be described again here.

[0067] 302. Determine whether the candidate gear is greater than the historical gear, and obtain the average load ratio and heat pump type of the heat pump project. The heat pump type is either fixed frequency or variable frequency.

[0068] The execution process of step 302 is the same as that of step 203, and will not be described again here.

[0069] 303. If the candidate load is greater than the historical load, then determine whether the average load ratio is greater than the first preset threshold.

[0070] The specific first preset threshold can be set according to the actual application scenario. As an example rather than a limitation, the first preset threshold can be 80% or 85%. For example, if the first preset threshold is 80%, the control equipment of the heat pump project will determine whether the average load ratio is greater than 80%.

[0071] 304. If the average load ratio is greater than the first preset threshold, the candidate gear position is determined as the target gear position;

[0072] For example, based on the example of step 303, the first preset threshold is 80%. It can be understood that an average load ratio greater than the first preset threshold indicates that the average load of the heat pump project is relatively large, and it is necessary to increase the heat pump for operation. That is, the candidate gear is determined as the target gear. On the one hand, it can reduce the overall energy consumption of the heat pump project, and on the other hand, it can solve the problem that the heat pump in the heat pump project operates under high load for a long time, resulting in a significant reduction in service life.

[0073] 305. If the average load ratio is greater than the second preset threshold and less than or equal to the first preset threshold, then when the heat pump type is a fixed frequency type, the historical gear will be determined as the target gear.

[0074] The specific second preset threshold can be set according to the actual application scenario. As an example rather than a limitation, the second preset threshold can be 40% or 45%.

[0075] For example, based on the example of step 303, the first preset threshold is 80%, and the second preset threshold is 40%. If the average load ratio is greater than 40% and less than or equal to 80%, then when the heat pump type is fixed frequency, the control equipment of the heat pump project will determine the historical gear as the target gear. Here, I = I', that is, the average load ratio of the heat pump project composed of fixed frequency heat pumps is close to 50%. At this time, the energy efficiency of the heat pump project is not high. If the candidate gear is determined as the target gear, the energy efficiency of the heat pump project will decrease. Only when the average load ratio is 100% can the candidate gear be determined as the target gear. The reason is that the fan speed and water pump flow rate of the fixed frequency heat pump correspond to the evaporation capacity and condensation capacity, respectively. Its fan speed or water pump flow rate is matched with the capacity after all the fixed frequency heat pumps are started. If the fixed frequency heat pumps are not all started, then the fan or water pump has redundant capacity and consumes more electricity.

[0076] 306. When the heat pump type is variable frequency, obtain the first average operating frequency of the heat pump project, and obtain the target gear based on the first average operating frequency;

[0077] Specifically, (1) when the heat pump type is variable frequency type, the control equipment of the heat pump project obtains the first average operating frequency of the heat pump project; (2) if the first average operating frequency is greater than or equal to the first preset frequency value, the control equipment of the heat pump project determines the candidate gear as the target gear; (3) if the first average operating frequency is less than the first preset frequency value, the control equipment of the heat pump project determines the historical gear as the target gear.

[0078] The first average operating frequency is the average operating frequency obtained by averaging the operating frequencies of all variable frequency heat pumps currently in operation in the heat pump project.

[0079] The specific first preset frequency value can be set according to the actual application scenario. As an example rather than a limitation, the first preset frequency value can be 50Hz or 60Hz. For example, the first preset frequency value is the maximum frequency value in the target operating frequency range. The coefficient of performance (COP) of the variable frequency heat pump is higher in the target operating frequency range. The coefficient of performance (COP) is used to represent the single cooling performance coefficient or heating performance coefficient, as well as the cooling and heating performance coefficients.

[0080] For example, when the heat pump is a variable frequency type, the control equipment of the heat pump project obtains the first average operating frequency of the heat pump project. If the first average operating frequency is greater than or equal to the first preset frequency value, the control equipment determines the candidate speed as the target speed, that is, the first average operating frequency is greater than or equal to the maximum frequency value. At this time, the energy efficiency of the heat pump project is low, and it is necessary to add more heat pumps to make the first average operating frequency closer to the maximum frequency value, thereby improving the energy efficiency of the heat pump project and thus improving the hot water production efficiency of the heat pump project. If the first average operating frequency is less than the first preset frequency value, the control equipment determines the historical speed as the target speed, where I = I', that is, the first average operating frequency is still within the target operating frequency range. At this time, the energy efficiency of the heat pump project is high, and it is not necessary to add more heat pumps to operate.

[0081] 307. If the average load ratio is greater than zero and less than or equal to the second preset threshold, then the historical load level is determined as the target load level.

[0082] For example, based on the example of step 305, the second preset threshold is 40%. If the average load ratio is greater than zero and less than or equal to 40%, then the historical gear is determined as the target gear, where I = I', that is, the average load of the heat pump project is relatively small, and there is no need to add heat pumps to operate. Since it takes a process for the heat pump to increase the load ratio from startup, the relatively small average load may also be because the heat pump project is still in the initial stage of startup. Therefore, determining the historical gear as the target gear can avoid adding heat pumps too early and reducing the energy efficiency of the heat pump project.

[0083] 308. If the average load ratio is zero, then the candidate gear position is determined as the target gear position;

[0084] Understandably, an average load ratio of zero indicates that the heat pump in a heat pump project has stopped due to a malfunction and needs to be replaced to operate, thus determining the candidate load level as the target load level.

[0085] 309. If the candidate level is lower than the historical level, the target level is determined based on the average load ratio and the heat pump type.

[0086] The execution process of step 309 is the same as that of step 205, and will not be described again here.

[0087] 310. If the candidate gear level is equal to the historical gear level, then the target gear level is determined based on the heat pump type;

[0088] The execution process of step 310 is the same as that of step 206, and will not be described again here.

[0089] 311. Control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level.

[0090] The execution process of step 311 is the same as that of step 103, and will not be described again here.

[0091] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0092] Please see Figure 4 Another embodiment of the control method for heat pump engineering in this application includes:

[0093] 401. Obtain the engineering demand value for the current period and the historical gearing levels for the previous period, and predict the gearing level for the current period based on the engineering demand value to obtain candidate gearing levels.

[0094] The execution process of step 401 is the same as that of step 101, and will not be described again here.

[0095] 402. Determine whether the candidate gear is greater than the historical gear, and obtain the average load ratio and heat pump type of the heat pump project. The heat pump type is either fixed frequency or variable frequency.

[0096] The execution process of step 402 is the same as that of step 203, and will not be described again here.

[0097] 403. If the candidate level is greater than the historical level, the target level is determined based on the average load ratio and the heat pump type.

[0098] The execution process of step 403 is the same as that of step 204, and will not be described again here.

[0099] 404. If the candidate load is lower than the historical load, determine whether the average load ratio is less than or equal to the second preset threshold.

[0100] The specific second preset threshold can be set according to the actual application scenario. As an example rather than a limitation, the second preset threshold can be 40% or 45%.

[0101] 405. If the average load ratio is less than or equal to the second preset threshold, the candidate gear position is determined as the target gear position.

[0102] For example, if the second preset threshold is 40%, and the average load ratio is less than or equal to 40%, the control equipment of the heat pump project will determine the candidate gear as the target gear. That is, the average load of the heat pump project is relatively small, and the currently running heat pump needs to be shut down. On the one hand, this reduces the energy consumption of the heat pump project, and on the other hand, it can solve the problem of the heat pump project maintaining a low load state, which leads to a significant reduction in its service life.

[0103] 406. If the average load ratio is greater than the second preset threshold and less than or equal to the first preset threshold, then when the heat pump type is a fixed frequency type, the candidate gear is determined as the target gear.

[0104] For example, based on the example of step 303, the first preset threshold is 80%, the second preset threshold is 40%. If the average load ratio is greater than 40% and less than or equal to 80%, then when the heat pump type is fixed frequency type, the control equipment of the heat pump project will determine the candidate gear as the target gear. That is, the average load ratio of the heat pump project composed of fixed frequency heat pumps is close to 50%. At this time, the energy efficiency of the heat pump project is not high, and the currently running heat pump needs to be turned off to improve the energy efficiency of the heat pump project.

[0105] 407. When the heat pump type is variable frequency, obtain the second average operating frequency of the heat pump project, and obtain the target gear based on the second average operating frequency;

[0106] The second average operating frequency is the average operating frequency obtained by averaging the operating frequencies of all variable frequency heat pumps currently in operation in the heat pump project.

[0107] When the heat pump is of the variable frequency type, the control equipment of the heat pump project obtains the second average operating frequency of the heat pump project, and makes further judgments based on the second average operating frequency to determine the target gear.

[0108] 408. If the average load ratio is greater than the first preset threshold, then when the heat pump type is a fixed frequency type, the candidate gear level will be determined as the target gear level.

[0109] For fixed-frequency heat pumps, the operating load ratio is the ratio between the number of currently operating compressors and the total number of compressors. For example, if a fixed-frequency heat pump has four compressors, then when one compressor is started, the operating load ratio is 25%.

[0110] For example, based on the example of step 303, the first preset threshold is 80%. If the average load ratio is greater than 80%, then when the heat pump type is a fixed frequency type, the candidate gear is determined as the target gear, that is, the number of fixed frequency heat pumps is reduced, thereby improving the energy efficiency of the heat pump project.

[0111] For example, if the heat pump project is a fixed-frequency heat pump with a single compressor, when the fixed-frequency heat pump is turned on, the average load ratio of the heat pump project is 100%. At this time, the average load ratio is greater than 80%, and it is necessary to turn off the single fixed-frequency heat pump to avoid the single fixed-frequency heat pump running continuously.

[0112] 409. When the heat pump type is variable frequency, obtain the third average operating frequency of the heat pump project, and obtain the target gear based on the third average operating frequency;

[0113] The third average operating frequency is the average operating frequency obtained by averaging the operating frequencies of all variable frequency heat pumps currently in operation in the heat pump project.

[0114] When the heat pump is of the variable frequency type, the control equipment of the heat pump project obtains the third average operating frequency of the heat pump project, and makes further judgments based on the third average operating frequency to determine the target gear.

[0115] 410. If the candidate gear level is equal to the historical gear level, then the target gear level is determined based on the heat pump type;

[0116] The execution process of step 410 is the same as that of step 206, and will not be described again here.

[0117] 411. Control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level.

[0118] The execution process of step 411 is the same as that of step 103, and will not be described again here.

[0119] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0120] Please see Figure 5 Another embodiment of the control method for heat pump engineering in this application includes:

[0121] 501. Obtain the engineering demand value for the current period and the historical gearing levels for the previous period, and predict the gearing level for the current period based on the engineering demand value to obtain candidate gearing levels.

[0122] The execution process of step 501 is the same as that of step 101, and will not be described again here.

[0123] 502. Determine whether the candidate gear is greater than the historical gear, and obtain the average load ratio and heat pump type of the heat pump project. The heat pump type is either fixed frequency or variable frequency.

[0124] The execution process of step 502 is the same as that of step 203, and will not be described again here.

[0125] 503. If the candidate level is greater than the historical level, the target level will be determined based on the average load ratio and the heat pump type.

[0126] The execution process of step 503 is the same as that of step 204, and will not be described again here.

[0127] 504. If the candidate level is lower than the historical level, the target level will be determined based on the average load ratio and the heat pump type.

[0128] The execution process of step 504 is the same as that of step 205, and will not be described again here.

[0129] 505. If the candidate gear is equal to the historical gear, then determine whether the heat pump type is a fixed frequency type;

[0130] Understandably, the fact that the candidate gear is equal to the historical gear indicates that the gear for the current cycle has not changed, and the control equipment of the heat pump project makes further judgments based on the type of heat pump.

[0131] 506. If the heat pump type is a fixed frequency type, then the historical gear setting will be set as the target gear setting;

[0132] If the heat pump type is a fixed frequency type, the control equipment of the heat pump project will determine the historical gear as the target gear, that is, maintain the number of heat pumps corresponding to the current operation of the heat pump project.

[0133] 507. If the heat pump type is variable frequency, obtain the fourth average operating frequency of the heat pump project, and obtain the target gear based on the fourth average operating frequency.

[0134] Specifically, (1) if the heat pump type is variable frequency, the control equipment of the heat pump project obtains the fourth average operating frequency of the heat pump project; (2) if the fourth average operating frequency is less than or equal to the first preset frequency value and greater than or equal to the second preset frequency value, the control equipment of the heat pump project determines the historical gear as the target gear; (3) if the fourth average operating frequency is less than the second preset frequency value, the control equipment of the heat pump project reduces the candidate gear by one gear to obtain the target gear; (4) if the fourth average operating frequency is greater than the first preset frequency value, the control equipment of the heat pump project increases the candidate gear by one gear to obtain the target gear.

[0135] The fourth average operating frequency is an average operating frequency obtained by averaging the operating frequencies of all currently operating variable-frequency heat pumps in a heat pump project.

[0136] The specific second preset frequency value can be set according to actual application scenarios. By way of example and not limitation, the second preset frequency value may be 30Hz or 40Hz. For example, the second preset frequency value is the minimum frequency value in the target operating frequency range, and the coefficient of performance of the variable-frequency heat pump in the target operating frequency range is relatively high. Coefficient Of Performance (COP) is used to represent either a single cooling performance coefficient or heating performance coefficient, and also to represent both cooling and heating performance coefficients.

[0137] For example, if the heat pump type is variable-frequency type, the control device of the heat pump project acquires the fourth average operating frequency of the heat pump project. If the fourth average operating frequency is less than or equal to the first preset frequency value and greater than or equal to the second preset frequency value, the control device of the heat pump project determines the historical gear as the target gear, that is, the fourth average operating frequency is still in the target operating frequency range, and the energy efficiency of the heat pump project is relatively high at this time, and there is no need to add heat pumps. If the fourth average operating frequency is less than the second preset frequency value, the control device of the heat pump project reduces the candidate gear by one gear to obtain the target gear, and subtracts the preset value from I of the current cycle. Based on the example of step 202, the preset value is the difference between the maximum values in each preset numerical interval, by way of example and not limitation, such as Figure 6 the PID gear matching table shown, the first preset numerical interval is: 0 < PIDsum < 10, and the second preset numerical interval is: 10 ≤ PIDsum < 20, that is, the preset value is 10, which means the fourth average operating frequency is less than the minimum frequency value. At this time, the energy efficiency of the heat pump project is low, and it is necessary to reduce the candidate gear by one gear, so that the fourth average operating frequency approaches the minimum frequency value, thereby improving the energy efficiency of the heat pump project and further improving the hot water production efficiency of the heat pump project. If the fourth average operating frequency is greater than the first preset frequency value, the control device of the heat pump project increases the candidate gear by one gear to obtain the target gear, and adds the preset value to I of the current cycle. Based on the example of step 202, the preset value is the difference between the maximum values in each preset numerical interval, for example, the first preset numerical interval is: 0 < PIDsum < 10, and the second preset numerical interval is: 10 ≤ PIDsum < 20, that is, the preset value is 10. Based on the example of step 306, that means the fourth average operating frequency is greater than the maximum frequency value. At this time, the energy efficiency of the heat pump project is low, and it is necessary to increase the candidate gear by one gear, so that the fourth average operating frequency approaches the maximum frequency value, thereby improving the energy efficiency of the heat pump project and further improving the hot water production efficiency of the heat pump project.

[0138] 508. Control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level.

[0139] The execution process of step 508 is the same as that of step 103, and will not be described again here.

[0140] In one feasible implementation, when the heat pump type is variable frequency type, the second average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the second average operating frequency, specifically including: (1) when the heat pump type is variable frequency type, the control device of the heat pump project obtains the second average operating frequency of the heat pump project; (2) if the second average operating frequency is less than or equal to the second preset frequency value, the control device of the heat pump project determines the candidate gear as the target gear; (3) if the second average operating frequency is greater than the second preset frequency value, the control device of the heat pump project determines the historical gear as the target gear.

[0141] For example, based on the example in step 507, when the heat pump type is variable frequency, the control equipment of the heat pump project obtains the second average operating frequency of the heat pump project. If the second average operating frequency is less than or equal to the second preset frequency value, the control equipment of the heat pump project determines the candidate gear as the target gear. That is, the second average operating frequency is less than the minimum frequency value. At this time, the energy efficiency of the heat pump project is low, and the currently running heat pump needs to be turned off to make the second average operating frequency closer to the minimum frequency value, thereby improving the energy efficiency of the heat pump project and thus improving the hot water production efficiency of the heat pump project. If the second average operating frequency is greater than the second preset frequency value, the control equipment of the heat pump project determines the historical gear as the target gear, where I = I', that is, the second average operating frequency is still within the target operating frequency range. At this time, the energy efficiency of the heat pump project is high, and there is no need to add heat pumps to operate.

[0142] In one feasible implementation, when the heat pump type is variable frequency type, the third average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the third average operating frequency, specifically including: (1) when the heat pump type is variable frequency type, the control device of the heat pump project obtains the third average operating frequency of the heat pump project; (2) if the third average operating frequency is less than or equal to the second preset frequency value, the control device of the heat pump project determines the candidate gear as the target gear; (3) if the third average operating frequency is greater than the second preset frequency value, the control device of the heat pump project determines the historical gear as the target gear.

[0143] For example, based on the example in step 507, when the heat pump type is variable frequency, the control equipment of the heat pump project obtains the third average operating frequency of the heat pump project. If the third average operating frequency is less than or equal to the second preset frequency value, the control equipment of the heat pump project determines the candidate gear as the target gear. That is, the third average operating frequency is less than the minimum frequency value. At this time, the energy efficiency of the heat pump project is low, and the currently running heat pump needs to be turned off to make the third average operating frequency close to the minimum frequency value, thereby improving the energy efficiency of the heat pump project and thus improving the hot water production efficiency of the heat pump project. If the third average operating frequency is greater than the second preset frequency value, the control equipment of the heat pump project determines the historical gear as the target gear, where I = I', that is, the third average operating frequency is still within the target operating frequency range. At this time, the energy efficiency of the heat pump project is high, and there is no need to add heat pumps to operate.

[0144] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0145] The control method of the heat pump project in the embodiments of this application has been described above. The control device of the heat pump project in the embodiments of this application is described below. Please refer to [link / reference]. Figure 7 One embodiment of the control device for a heat pump system in this application includes:

[0146] The acquisition module 701 is used to acquire the engineering demand value of the current period and the historical gear position of the previous period, and to predict the gear position of the current period based on the engineering demand value to obtain candidate gear positions.

[0147] Comparison module 702 is used to compare the candidate gear position with the historical gear position to obtain the target gear position;

[0148] The control module 703 is used to control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level.

[0149] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0150] Please see Figure 8 Another embodiment of the control device for the heat pump project in this application includes:

[0151] The acquisition module 701 is used to acquire the engineering demand value of the current period and the historical gear position of the previous period, and to predict the gear position of the current period based on the engineering demand value to obtain candidate gear positions.

[0152] Comparison module 702 is used to compare the candidate gear position with the historical gear position to obtain the target gear position;

[0153] The control module 703 is used to control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level.

[0154] Optionally, the comparison module 702 includes:

[0155] The judgment and acquisition unit 7021 is used to determine whether the candidate gear is greater than the historical gear, and to acquire the average load ratio and heat pump type of the heat pump project, wherein the heat pump type is either fixed frequency type or variable frequency type.

[0156] The first judgment unit 7022 is used to determine the target level based on the average load ratio and heat pump type if the candidate level is greater than the historical level.

[0157] The second judgment unit 7023 is used to make a judgment based on the average load ratio and heat pump type if the candidate level is less than the historical level, and obtain the target level.

[0158] The determination unit 7024 is used to determine the target gear based on the heat pump type if the candidate gear is equal to the historical gear.

[0159] Optionally, the first judgment unit 7022 includes:

[0160] The first judgment subunit 70221 is used to determine whether the average load ratio is greater than the first preset threshold if the candidate level is greater than the historical level.

[0161] The first determining subunit 70222 is used to determine the candidate gear as the target gear if the average load ratio is greater than the first preset threshold.

[0162] The second determining subunit 70223 is used to determine the historical gear as the target gear when the heat pump type is a fixed frequency type, if the average load ratio is greater than the second preset threshold and less than or equal to the first preset threshold.

[0163] The first acquisition subunit 70224 is used to acquire the first average operating frequency of the heat pump project when the heat pump type is variable frequency type, and to obtain the target gear based on the first average operating frequency.

[0164] The third determining subunit 70225 is used to determine the historical gear as the target gear if the average load ratio is greater than zero and less than or equal to the second preset threshold.

[0165] The fourth determining subunit 70226 is used to determine the candidate gear as the target gear if the average load ratio is equal to zero.

[0166] Optionally, the first acquisition subunit 70224 is specifically used for:

[0167] When the heat pump type is variable frequency, obtain the first average operating frequency of the heat pump project;

[0168] If the first average operating frequency is greater than or equal to the first preset frequency value, then the candidate gear is determined as the target gear;

[0169] If the first average operating frequency is less than the first preset frequency value, then the historical gear is determined as the target gear.

[0170] Optionally, the second judgment unit 7023 includes:

[0171] The second judgment subunit 70231 is used to determine whether the average load ratio is less than or equal to the second preset threshold if the candidate load is less than the historical load.

[0172] The fifth determining subunit 70232 is used to determine the candidate gear as the target gear if the average load ratio is less than or equal to the second preset threshold.

[0173] The sixth determining subunit 70233 is used to determine the candidate gear as the target gear when the heat pump type is a fixed frequency type, if the average load ratio is greater than the second preset threshold and less than or equal to the first preset threshold.

[0174] The second acquisition subunit 70234 is used to acquire the second average operating frequency of the heat pump project when the heat pump type is variable frequency type, and to obtain the target gear based on the second average operating frequency.

[0175] Optionally, the second acquisition subunit 70234 is specifically used for:

[0176] When the heat pump type is variable frequency, obtain the second average operating frequency of the heat pump project;

[0177] If the second average operating frequency is less than or equal to the second preset frequency value, then the candidate gear is determined as the target gear.

[0178] If the second average operating frequency is greater than the second preset frequency value, then the historical gear will be determined as the target gear.

[0179] Optionally, the second judgment unit 7023 further includes:

[0180] The seventh determining subunit 70235 is used to determine the candidate gear as the target gear when the heat pump type is a fixed frequency type if the average load ratio is greater than the first preset threshold.

[0181] The third acquisition subunit 70236 is used to acquire the third average operating frequency of the heat pump project when the heat pump type is variable frequency, and to obtain the target gear based on the third average operating frequency.

[0182] Optionally, the third acquisition subunit 70236 is specifically used for:

[0183] When the heat pump type is variable frequency, obtain the third average operating frequency of the heat pump project;

[0184] If the third average operating frequency is less than or equal to the second preset frequency value, then the candidate gear is determined as the target gear.

[0185] If the third average operating frequency is greater than the second preset frequency value, then the historical gear will be determined as the target gear.

[0186] Optionally, the determining unit 7024 includes:

[0187] The third judgment subunit 70241 is used to determine whether the heat pump type is a fixed frequency type if the candidate gear is equal to the historical gear.

[0188] The eighth determining subunit 70242 is used to determine the historical gear as the target gear if the heat pump type is a fixed frequency type;

[0189] The fourth acquisition subunit 70243 is used to acquire the fourth average operating frequency of the heat pump project if the heat pump type is variable frequency type, and to obtain the target gear based on the fourth average operating frequency.

[0190] Optionally, the fourth acquisition subunit 70243 is specifically used for:

[0191] If the heat pump type is variable frequency, then obtain the fourth average operating frequency of the heat pump project;

[0192] If the fourth average operating frequency is less than or equal to the first preset frequency value and greater than or equal to the second preset frequency value, then the historical gear will be determined as the target gear.

[0193] If the fourth average operating frequency is less than the second preset frequency value, the candidate gear will be reduced by one gear to obtain the target gear.

[0194] If the fourth average operating frequency is greater than the first preset frequency value, then the candidate gear will be increased by one gear to obtain the target gear.

[0195] Optionally, the control module 703 is specifically used for:

[0196] Obtain the number of candidate heat pumps, which represents the number of heat pumps currently in operation in the heat pump project;

[0197] If the target gear is greater than the number of candidate heat pumps, the difference between the target gear and the number of candidate heat pumps is calculated to obtain the first number of heat pumps. The heat pumps of the first number of heat pumps in the heat pump project are started based on the first preset rule. The target gear is used to represent the total number of heat pumps corresponding to the heat pumps that will be in operation in the heat pump project.

[0198] If the target gear is less than the number of candidate heat pumps, the difference between the number of candidate heat pumps and the target gear is calculated to obtain the second number of heat pumps, and the second number of heat pumps in the heat pump project is controlled to shut down based on the second preset rule.

[0199] If the target heat pump level is equal to the number of candidate heat pumps, then continue running the heat pumps corresponding to that number of candidate heat pumps.

[0200] Optionally, the determination module 701 is specifically used for:

[0201] Obtain the water temperature parameter set, and perform calculations based on the water temperature parameter set and the preset engineering requirement formula to obtain the engineering requirement value for the current period, and obtain the historical gear of the previous period;

[0202] Based on the engineering requirements, a preset gear model is called to predict the gear and obtain candidate gears.

[0203] In this embodiment, the heat pump is predicted based on the current cycle's engineering demand value to obtain candidate heat pumps. The candidate heat pumps are then compared with the historical heat pumps from the previous cycle to obtain the target heat pump. The heat pumps in the heat pump project are then controlled to start or stop based on the target heat pump. This solves the problem that most heat pumps are shut down when the water temperature is close to the total water supply temperature, resulting in the inability to reach the total water supply temperature. This increases the success rate of reaching the total water supply temperature, thereby improving the hot water production efficiency of the heat pump project and ultimately achieving the goal of the heat pump project operating within its optimal energy efficiency range.

[0204] above Figure 7 and Figure 8 The control device of the heat pump project in this application embodiment is described in detail from the perspective of modular functional entities. The control equipment of the heat pump project in this application embodiment is described in detail from the perspective of hardware processing.

[0205] Figure 9 This is a schematic diagram of the structure of a control device 900 for a heat pump project according to an embodiment of this application. The control device 900 can vary significantly due to different configurations or performance characteristics. It may include one or more central processing units (CPUs) 910 (e.g., one or more processors) and a memory 920, and one or more storage media 930 (e.g., one or more mass storage devices) storing application programs 933 or data 932. The memory 920 and storage media 930 can be temporary or persistent storage. The program stored in the storage media 930 may include one or more modules (not shown in the diagram), each module including a series of instruction operations on the control device 900 of the heat pump project. Furthermore, the processor 910 may be configured to communicate with the storage media 930 and execute the series of instruction operations in the storage media 930 on the control device 900 of the heat pump project.

[0206] The control equipment 900 for a heat pump project may also include one or more power supplies 940, one or more wired or wireless network interfaces 950, one or more input / output interfaces 960, and / or one or more operating systems 931, such as Windows Server, Mac OS X, Unix, Linux, FreeBSD, etc. Those skilled in the art will understand that... Figure 9 The control equipment structure shown for a heat pump project does not constitute a limitation on the control equipment for the heat pump project. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0207] This application also provides a control device for a heat pump project, the control device for the heat pump project including a memory and a processor, the memory storing computer-readable instructions, when the computer-readable instructions are executed by the processor, causing the processor to perform the steps of the control method for the heat pump project in the above embodiments.

[0208] This application also provides a computer-readable storage medium, which can be a non-volatile computer-readable storage medium or a volatile computer-readable storage medium, wherein the computer-readable storage medium stores instructions that, when executed on a computer, cause the computer to perform the steps of the control method for the heat pump project.

[0209] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0210] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0211] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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. Such 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 this application.

Claims

1. A control method for a heat pump project, wherein, The heat pump system consists of multiple heat pumps, and the control method for the heat pump system includes: A set of water temperature parameters is obtained, and calculations are performed based on the set of water temperature parameters and a preset engineering requirement formula to obtain the engineering requirement value for the current cycle, and the historical gear value for the previous cycle is obtained; wherein, the set of water temperature parameters includes the current water temperature of the current cycle, the target water temperature of the current cycle, and the temperature difference value of the previous cycle; the historical gear value is used to indicate the number of heat pumps that were in operation in the previous cycle of the current cycle. Based on the engineering requirements, a preset gear model is invoked to predict the gear level and obtain candidate gear levels; wherein, the candidate gear level is used to represent the number of heat pumps that will be in operation in the current cycle; The candidate gear position is compared with the historical gear positions to obtain the target gear position; The heat pump in the heat pump project is started or stopped based on the target gear level; The step of comparing the candidate gear position with the historical gear position to obtain the target gear position includes: determining whether the candidate gear position is greater than the historical gear position, and obtaining the average load ratio and heat pump type of the heat pump project, wherein the heat pump type is a fixed frequency type or a variable frequency type; if the candidate gear position is greater than the historical gear position, the target gear position is obtained based on the average load ratio and the heat pump type; if the candidate gear position is less than the historical gear position, the target gear position is obtained based on the average load ratio and the heat pump type; if the candidate gear position is equal to the historical gear position, the target gear position is determined based on the heat pump type.

2. The control method for a heat pump project according to claim 1, wherein, If the candidate gear level is greater than the historical gear level, then a target gear level is determined based on the average load ratio and the heat pump type, including: If the candidate load is greater than the historical load, then determine whether the average load ratio is greater than a first preset threshold. If the average load ratio is greater than the first preset threshold, then the candidate gear position is determined as the target gear position; If the average load ratio is greater than the second preset threshold and less than or equal to the first preset threshold, then when the heat pump type is a fixed frequency type, the historical gear level is determined as the target gear level. When the heat pump type is variable frequency, the first average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the first average operating frequency; If the average load ratio is greater than zero and less than or equal to the second preset threshold, then the historical load level is determined as the target load level. If the average load ratio is equal to zero, then the candidate gear position is determined as the target gear position.

3. The control method for a heat pump project according to claim 2, wherein, When the heat pump type is variable frequency, the first average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the first average operating frequency, including: When the heat pump type is variable frequency, obtain the first average operating frequency of the heat pump project; If the first average operating frequency is greater than or equal to the first preset frequency value, then the candidate gear position is determined as the target gear position; If the first average operating frequency is less than the first preset frequency value, then the historical gear position is determined as the target gear position.

4. The control method for a heat pump project according to claim 1, wherein, If the candidate gear level is lower than the historical gear level, then a target gear level is determined based on the average load ratio and the heat pump type, including: If the candidate load is less than the historical load, then determine whether the average load ratio is less than or equal to the second preset threshold. If the average load ratio is less than or equal to the second preset threshold, then the candidate gear position is determined as the target gear position; If the average load ratio is greater than the second preset threshold and less than or equal to the first preset threshold, then when the heat pump type is a fixed frequency type, the candidate gear is determined as the target gear. When the heat pump type is variable frequency, the second average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the second average operating frequency.

5. The control method for a heat pump project according to claim 4, wherein, When the heat pump type is variable frequency, the second average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the second average operating frequency, including: When the heat pump type is a variable frequency type, obtain the second average operating frequency of the heat pump project; If the second average operating frequency is less than or equal to the second preset frequency value, then the candidate gear position is determined as the target gear position; If the second average operating frequency is greater than the second preset frequency value, then the historical gear position is determined as the target gear position.

6. The control method for a heat pump project according to claim 5, wherein, After determining whether the average load ratio is less than or equal to a second preset threshold if the candidate load is less than the historical load, the method further includes: If the average load ratio is greater than the first preset threshold, then when the heat pump type is a fixed frequency type, the candidate gear is determined as the target gear. When the heat pump type is variable frequency, the third average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the third average operating frequency.

7. The control method for a heat pump project according to claim 6, wherein, When the heat pump type is variable frequency, the third average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the third average operating frequency, including: When the heat pump type is variable frequency, obtain the third average operating frequency of the heat pump project; If the third average operating frequency is less than or equal to the second preset frequency value, then the candidate gear is determined as the target gear. If the third average operating frequency is greater than the second preset frequency value, then the historical gear position is determined as the target gear position.

8. The control method for a heat pump project according to claim 1, wherein, If the candidate gear level is equal to the historical gear level, then determining the target gear level based on the heat pump type includes: If the candidate gear position is equal to the historical gear position, then determine whether the heat pump type is a fixed frequency type; If the heat pump type is a fixed frequency type, then the historical gear position is determined as the target gear position; If the heat pump type is a variable frequency type, then the fourth average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the fourth average operating frequency.

9. The control method for a heat pump project according to claim 8, wherein, If the heat pump type is a variable frequency type, then the fourth average operating frequency of the heat pump project is obtained, and the target gear is obtained based on the fourth average operating frequency, including: If the heat pump type is a variable frequency type, then obtain the fourth average operating frequency of the heat pump project; If the fourth average operating frequency is less than or equal to the first preset frequency value and greater than or equal to the second preset frequency value, then the historical gear position is determined as the target gear position. If the fourth average operating frequency is less than the second preset frequency value, then the candidate gear is reduced by one gear to obtain the target gear. If the fourth average operating frequency is greater than the first preset frequency value, then the candidate gear is increased by one gear to obtain the target gear.

10. The control method for a heat pump project according to any one of claims 1-9, wherein, The process of controlling the start-up or shutdown of the heat pump in the heat pump project based on the target gear level includes: Obtain the number of candidate heat pumps, which represents the number of heat pumps currently in operation in the heat pump project; If the target gear is greater than the number of candidate heat pumps, the difference between the target gear and the number of candidate heat pumps is calculated to obtain the first number of heat pumps, and the heat pumps of the first number of heat pumps in the heat pump project are started based on the first preset rule. The target gear is used to represent the total number of heat pumps corresponding to the heat pumps that will be in operation in the heat pump project. If the target gear is less than the number of candidate heat pumps, the difference between the number of candidate heat pumps and the target gear is calculated to obtain the second number of heat pumps, and the second number of heat pumps in the heat pump project is controlled to shut down based on the second preset rule. If the target gear is equal to the number of candidate heat pumps, then continue running the heat pumps corresponding to the number of candidate heat pumps.

11. A control device for a heat pump project, wherein, The heat pump system consists of multiple heat pumps, and the control device for the heat pump system includes: The acquisition and determination module is used to acquire a set of water temperature parameters, and perform calculations based on the set of water temperature parameters and a preset engineering requirement formula to obtain the engineering requirement value for the current cycle, and to acquire the historical gear position for the previous cycle; wherein, the set of water temperature parameters includes the current water temperature of the current cycle, the target water temperature of the current cycle, and the temperature difference value of the previous cycle; the historical gear position is used to represent the number of heat pumps in operation in the previous cycle of the current cycle; based on the engineering requirement value, a preset gear position model is called to predict the gear position and obtain candidate gear positions; wherein, the candidate gear positions are used to represent the number of heat pumps that will be in operation in the current cycle; The comparison module is used to compare the candidate gear position with the historical gear position to obtain the target gear position; The control module is used to control the start-up or shutdown of the heat pump in the heat pump project based on the target gear level; The step of comparing the candidate gear position with the historical gear position to obtain the target gear position includes: determining whether the candidate gear position is greater than the historical gear position, and obtaining the average load ratio and heat pump type of the heat pump project, wherein the heat pump type is a fixed frequency type or a variable frequency type; if the candidate gear position is greater than the historical gear position, the target gear position is obtained based on the average load ratio and the heat pump type; if the candidate gear position is less than the historical gear position, the target gear position is obtained based on the average load ratio and the heat pump type; if the candidate gear position is equal to the historical gear position, the target gear position is determined based on the heat pump type.

12. A control device for a heat pump project, wherein, The control device of the heat pump project includes: a memory and at least one processor, wherein the memory stores instructions; The at least one processor invokes the instructions in the memory to cause the control device of the heat pump project to execute the control method of the heat pump project as described in any one of claims 1-10.

13. A computer-readable storage medium storing instructions, wherein, When the instructions are executed by the processor, they implement the control method for the heat pump project as described in any one of claims 1-10.

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