A high-efficiency control method for an air source heat pump parallel operation system

Abstract

This invention discloses an efficient control method for a parallel operation system of an air source heat pump, comprising: S1, acquiring the current outdoor temperature, and calculating and setting the target water supply temperature of the system according to a preset heating terminal scheduling curve; S2, calculating the total load of the system based on the outdoor temperature and a preset heating load prediction model. Q o Based on the outdoor temperature, the system's target water supply temperature, and the preset heat pump heating load model, calculate the heating load of a single air source heat pump. Q e And calculate the value based on the total system load. Q o S3. Calculate the basic target number of air source heat pumps to be put into operation based on the heating load of a single air source heat pump; S4. Obtain the cumulative running time of each air source heat pump in the system, and divide all air source heat pumps into several operation tiers according to the minimum cumulative running time as the benchmark and the preset time interval; S5. According to the final target number of air source heat pumps to be put into operation, and according to the priority order of the operation tiers, adjust the air source heat pumps in the corresponding tiers to be put into operation in sequence.

Description

Technical Field

[0001] This invention relates to the field of heat pump control, and more specifically to a high-efficiency control method for a parallel operation system of air source heat pumps. Background Technology

[0002] Existing parallel operation control systems for air source heat pumps have clear defects, specifically quantified as follows: 1. Rigid control mode: Centralized control using wired controllers (each controller manages 3-16 devices), all devices start and stop synchronously, lacking dynamic adjustment capabilities, with a heating response delay ≥30 minutes, unable to match dynamic load changes in the heating system; 2. Poor heating capacity matching: Unified temperature settings result in over- or under-heating in ≥20% of cases, with over-heating leading to 10%-20% energy waste, and under- or over-heating causing significant indoor temperature fluctuations, severely impacting user comfort; 3. Severe pipeline losses: Large heating fluctuations (temperature difference ≥5℃), leading to a more than 20% increase in the frequency of thermal stress impacts on the pipeline network over the long term, resulting in a shortened pipeline lifespan and an increased failure rate. These defects prevent existing systems from achieving precise on-demand heating, resulting in low energy utilization and poor operational stability. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an efficient control method for a parallel operation system of an air source heat pump.

[0004] The objective of this invention is achieved through the following technical solution: A highly efficient control method for a parallel operation system of air source heat pumps includes: S1. Obtain the current outdoor temperature, and calculate and set the target water supply temperature of the system according to the preset heating terminal scheduling curve; S2. Based on the outdoor temperature and the preset heating load prediction model, calculate the total system load. Q o ; Based on the outdoor temperature, the system target water supply temperature, and the preset heat pump heating load model, the heating load of a single air source heat pump is calculated. And calculate the value based on the total system load. Q o Heating load of a single air source heat pump The basic target number of units put into operation was calculated. ; S3. Obtain the cumulative running time of each air source heat pump in the system, and divide all air source heat pumps into several commissioning tiers according to the minimum cumulative running time and the preset time interval. S4. Based on the final target number of units to be put into operation, and in accordance with the priority order of the operation teams, the direct digital controller sequentially controls the air source heat pumps and their associated electric switching valves in the corresponding teams to be put into operation.

[0005] Furthermore, the final target number of units to be put into operation is... ;like Greater than or equal to the total number of air source heat pumps in the system Then all air source heat pumps will be put into operation.

[0006] Furthermore, in step S3, the preset time interval is 200h.

[0007] Furthermore, the air source heat pumps in the system are arranged in a matrix and assigned corresponding row and column numbers; In step S4, within the same commissioning phase, the direct digital controller is commissioned according to the following logic: Count the number of air source heat pumps with odd-numbered line numbers in the current tier. Even number of tables Based on the number of units to be put into operation and , Based on the size relationship, prioritize the row with more units in the odd-numbered rows or the row with more units in the even-numbered rows; within the same row, execute the units in ascending order of column number.

[0008] Furthermore, after commissioning, the actual water supply temperature of the system is monitored in real time. When the difference between the actual water supply temperature and the system's target water supply temperature exceeds a preset hysteresis range, the number of units put into operation is increased or decreased; the preset hysteresis range is... ℃.

[0009] Furthermore, when the direct digital controller issues a start command, it first opens the corresponding electric switch valve and starts the air source heat pump after a first preset time delay; when it issues a stop command, it first shuts down the air source heat pump and shuts down the corresponding electric switch valve after a second preset time delay; both the first preset time and the second preset time are 10s.

[0010] This invention also provides a high-efficiency control device for a parallel air source heat pump system. The parallel air source heat pump system includes several air source heat pumps with control boxes. One side of the bottom of each air source heat pump is connected to a water supply pipeline via a flow switch and an electric switching valve. The other side has an interface connected to a return water pipeline. Each control box and electric switching valve is connected to a direct digital controller (DDC), which is also connected to a temperature sensor. The system includes: The parameter acquisition and target setting module is used to acquire the current outdoor temperature, calculate and set the target water supply temperature of the system according to the preset heating terminal scheduling curve; The load forecasting and unit number calculation module is used to calculate the total system load based on the outdoor temperature and a preset heating load forecasting model. Q o Based on the outdoor temperature, the system target water supply temperature, and the preset heat pump heating load model, calculate the heating load of a single air source heat pump. And calculate the value based on the total system load. Q o Heating load of a single air source heat pump The basic target number of units put into operation was calculated. ; The equipment classification and scheduling module is used to obtain the cumulative running time of each air source heat pump in the system. Based on the minimum cumulative running time, all air source heat pumps are divided into several commissioning tiers according to a preset time interval. The dynamic commissioning module is used to sequentially control the air source heat pumps and their associated electric switching valves in the corresponding echelons according to the priority order of the commissioning echelons, based on the final target number of units to be commissioned.

[0011] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the efficient control method for the parallel operation system of the air source heat pump.

[0012] The present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the efficient control method for the parallel operation system of the air source heat pump.

[0013] Compared with the prior art, the beneficial effects of the technical solution of the present invention are: 1. Calculate the system load using a load forecasting model correlated with outdoor temperature. Q o And dynamically match the number of units to be enabled. This completely breaks away from the rigid "all on, all off" model, ensuring a precise match between heating supply and actual demand. It addresses the issue of excess or insufficient heating at its source, reducing energy waste (to within 5%) and significantly shortening heating response time. 30 minutes (at this time, the DDC sampling frequency is 30 seconds / time).

[0014] 2. Equipment priority scheduling is performed based on cumulative runtime (e.g., 200-hour tiers) and spatial matrix (odd / even rows and columns). This ensures uniform wear distribution among all heat pump units in the parallel system, preventing excessive aging of some units. By dynamically adjusting the number of units in operation, instead of a uniform temperature setting, the problem of poor heat supply matching is solved; at the same time, the spatial matrix-style intermittent operation (alternating odd and even) helps optimize local hydraulic balance and heat distribution, improving the overall operational stability of the system.

[0015] 3. Fine-tuning of the 0.5℃ approximation hysteresis of the target water supply temperature. This ensures that the actual water supply temperature consistently and stably matches the target temperature. This effectively reduces temperature fluctuations within the heating network, significantly decreasing the frequency of thermal stress impacts caused by thermal expansion and contraction, extending the network's lifespan, and reducing the rate of leaks and other malfunctions. It also reduces the frequency of over / under-supply of heat to ≤5%, decreases room temperature fluctuations, and significantly improves comfort.

[0016] 4. 10-second delay control logic for electric valve and heat pump start / stop. This ensures that the water flow in the water system stabilizes before starting the water pump or compressor, fundamentally eliminating the potential for "flow switch failure" reports due to momentary water shortage, and guaranteeing system reliability in unattended operation. This reduces the system failure rate by more than 15%, ultimately achieving multiple goals: precise on-demand heating, energy saving, and safe and stable operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the parallel operation system of the air source heat pump in the embodiment.

[0018] Figure 2 This is an elevation view of the air source heat pump installation and piping.

[0019] Figure 3 This is a flowchart illustrating the operational logic of the control method in a specific embodiment. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0021] Example 1 The air source heat pump parallel intelligent operation system on which this embodiment is based is as follows: Figure 1As shown, the system includes several air source heat pumps 1. Each air source heat pump 1 contains a control box 2. A water flow switch 3 and an electric switch valve 4 are installed on the solid line, which represents the water supply line 5 of the air source heat pump, and the dashed line represents the return line 6 of the air source heat pump. In this embodiment, the model of the air source heat pump 1 is GN-R155ML. Each air source heat pump has an independent inlet and outlet, connected to the system network composed of the water supply line 5 and the return line 6. The air source heat pumps are connected in parallel for intelligent operation through a communication cable 7, a direct digital controller 8, and an outdoor temperature sensor 9. The installation and connection elevation view of the air source heat pumps is shown below. Figure 2 As shown.

[0022] The air source heat pump is installed in a fixed open outdoor location. Each air source heat pump 1 has a concrete foundation at its bottom for support. Each concrete foundation is equipped with a spring shock absorber at its top. The air source heat pump 1 is placed on top of the spring shock absorber. The water supply pipeline 5 connected to the outlet of the air source heat pump 1 is equipped with a flow switch 3 and an electric switch valve 4 in sequence. The return water outlet of the air source heat pump 1 is directly connected to the return water pipeline 6.

[0023] In this embodiment, the air source heat pumps are numbered according to their "row" and "column". The number is a four-digit number, and the row number and column number are both two-digit numbers. The row number is the first two digits of the four-digit number, and the column number is the last two digits of the four-digit number. The first row is 01, the second row is 02, the third row is 03, and so on. The first column is 01, the second column is 02, the third column is 03, and so on. For example, the air source heat pump number 0306 is located in the third row and the sixth column.

[0024] Preferably, the antifreeze temperature of the air source heat pump can be modified; when the air source heat pump enters the antifreeze mode (safety precautions inside the direct digital controller DDC), the electric switch valve opens in conjunction. The Direct Digital Controller (DDC) is used to monitor the status, parameters, and faults of the air source heat pump in real time, ensuring the stable operation of the parallel intelligent air source heat pump system. The DDC is connected to the air source heat pump via a communication cable with an RS-485 interface and a Modbus communication protocol.

[0025] This embodiment provides a basis Figure 1 High-efficiency control methods for parallel operation systems of air source heat pumps, specifically including: S1. Obtain the current outdoor temperature, and calculate and set the target water supply temperature of the system according to the preset heating terminal scheduling curve; S2. Based on the outdoor temperature and the preset heating load prediction model, calculate the total system load. Q o The heating load prediction model is a functional relationship between outdoor temperature and heating terminal load: Q o=a*To 2 +b*To+c (To is the outdoor temperature, and a, b, and c are the corresponding coefficients); Table 1 shows the initial input parameters for the heating load model of the GN-R155ML air source heat pump. The heating capacity per unit listed in the table is the initial theoretical heating load. When the system is first started or when the outdoor temperature changes, The system is used as a benchmark for the heating load of a single unit in the calculation; if the outdoor temperature remains constant for 4 consecutive hours, the system's measured total heating output during that stable period and the historical number of units actually in operation during that period are retrieved. Through total heat supply / The corrected heating load per unit was calculated. Iterative calculations continued until the outdoor temperature remained stable. After numerical stability and convergence, the converged value is used. As an effective single-unit heating load; Based on the outdoor temperature, the system's target water supply temperature, and the aforementioned air source heat pump heating load model, the effective heating load per unit is obtained. Combined with the calculated total system load value ,according to Calculate the basic target number of units in operation The calculation result is then rounded up.

[0026] Table 1 Initial input parameters for the heating load model of GN-R155ML air source heat pump.

[0027] A heating load of an air source heat pump corresponds to different outdoor temperatures and relative humidity. The heating load of the air source heat pump is calculated by interpolation between two adjacent outdoor temperature values ​​(when the outlet water temperature is 40℃, the heating load of the air source heat pump is 126.2kW when the outdoor temperature is 0℃, and the heating load of the air source heat pump is 110kW when the outdoor temperature is -5℃; when the outdoor temperature is -3℃, the heating capacity of the air source heat pump is calculated by interpolation as follows: 126.2-(0-(-3)) / (0-(-5))*(126.2-110)=116.48). The heating load model of the heat pump is a functional relationship between the heating load of the air source heat pump and the outdoor temperature and the system supply water temperature.

[0028] S3. Obtain the cumulative running time of each air source heat pump in the system, and divide all air source heat pumps into several commissioning tiers according to the minimum cumulative running time and the preset time interval. S4. Based on the final target number of units to be put into operation, and in accordance with the priority order of the operation teams, the direct digital controller sequentially controls the air source heat pumps and their associated electric switching valves in the corresponding teams to be put into operation.

[0029] When the command is executed to start, the electric switch valve opens first, and the air source heat pump executes the start command 10 seconds later. The delay time interval ensures that the air source heat pump does not report a water flow switch fault. When the stop command is executed, the air source heat pump is shut down first, and the electric switch valve executes the shut-off command 10 seconds later. The delay time interval ensures that the air source heat pump does not report a water flow switch failure. Preferably, the building's heating terminals are divided into three types: radiators, underfloor heating, and fan coil units. This embodiment introduces the concept of heating terminal scheduling curves, which are curves showing the variation of system supply water temperature under different outdoor temperatures for the three different heating terminal types. These three heating terminal scheduling curves are then imported into a direct digital controller (DDC). Both the preset heating load prediction model and the preset heat pump heating load model are imported into the Direct Digital Controller (DDC).

[0030] When the air source heat pump is started for the first time during heating, a start command is issued. The Direct Digital Controller (DDC) scans all air source heat pumps and electric on / off valves, and reads, records, and stores the monitored parameter data (including equipment status, fault conditions, running time, temperature, pressure, etc.) in the DDC. Based on the internal heating terminal scheduling curve and the values ​​fed back from the outdoor temperature sensor, the DDC automatically calculates the required water supply temperature for the system and uses this temperature as the system target setpoint SV. Alternatively, the operator can manually issue the system target setpoint SV (the operator-issued command is the highest level control command). Specifically, the direct digital controller is put into operation according to the following logic: First, when the total number of air source heat pumps is N, and when n+1≥N (considering the safety margin factor, the target number of units is n+1), all air source heat pumps will be put into operation. Secondly, when n+1 < N, deployment shall be carried out according to the following rules: (1) Operation rule for n+1 < N: DDC sorts air source heat pumps according to their cumulative operating time, using the minimum cumulative operating time as the calculation benchmark and 200-hour intervals as the dividing line. Air source heat pumps with a cumulative operating time within the range of the minimum cumulative operating time plus 200 hours are classified as the first tier (number of pumps: n1), air source heat pumps with a cumulative operating time within the range of the minimum cumulative operating time plus 400 hours are classified as the second tier (number of pumps: n2), air source heat pumps with a cumulative operating time within the range of the minimum cumulative operating time plus 600 hours are classified as the third tier (number of pumps: n3), and so on, until all air source heat pumps are classified. Air source heat pumps with smaller tier values ​​are given priority for commissioning, and air source heat pumps within each tier have the same commissioning priority. (2) The operation logic flow when n+1 < N is put into operation is shown in Figure 3, where n1 represents the air source heat pump with an operating time of 0-200h; n2 represents the air source heat pump with an operating time of 200-400h; and n3 represents the air source heat pump with an operating time of 400-600h. q represents the number of odd-numbered units, and o represents the number of even-numbered units.

[0031] (201) When n+1 < n1, according to the logic of priority "row" or "column", the priority "row" is put into operation. Taking "row" as the example of the judgment rule, count the number of units q with odd row number and the number of units o with even row number to decide whether to put the odd row or the even row into operation. Sort n+1, q, and o in order of size. When n+1 is the smallest, select the air source heat pump with an odd row number to put into operation. Activate the heat pumps sequentially by direct digital controller (DDC) in ascending order of row number, and in the same row, adjust the DDC to activate them sequentially in ascending order of column number, until n+1 units are activated.

[0032] (202) When n+1 is in the middle, select the larger "row" between q and o to operate (if q and o are the same, the odd-numbered rows are operated first); operate sequentially by direct digital controller (DDC) according to the row number from smallest to largest, and operate sequentially by direct digital controller (DDC) according to the column number of the same "row" from smallest to largest, until n+1 units are operated.

[0033] (203) When the total number of units to be put into operation n+1 reaches the maximum value, prioritize the entire row with more units in rows q and o and put it into operation; for the remaining row of air source heat pumps, pair each unit column number with the column number of the units already in operation and calculate the difference: the larger the difference is, the more the two heat pumps belong to different columns and the greater the spatial distance. Count the total number of times the difference between each heat pump in the remaining row and the column number of the units already in operation is non-zero. The larger the value, the more dispersed the heat pump and the units already in operation are, and the weaker the cold and heat accumulation effect; put them into operation in order from large to small by direct digital controller (DDC) until n+1 units are put into operation; if the number is the same, put them into operation in order from small to large by row number, and in order from small to large by column number within the row until n+1 units are put into operation. (204) When n1≤n+1<n1+n2, first put all n1 units into operation, using "row" as the judgment rule example: First, count the number of units with odd row numbers and the number of units with even row numbers in n1; Next, count the number of units with odd row numbers and the number of units with even row numbers in n2; When the odd number of rows in n1 is greater than or equal to the even number of rows, i.e., q ≥ 0, then n2 will run the air source heat pump of the odd number of rows; otherwise, n2 will run the air source heat pump of the even number of rows. Taking the example of having more even-numbered rows in n1, compare n+1 with n1 + (the number of even-numbered rows in n2). When n+1 < n1 + (the number of even-numbered rows in n2), the even-numbered rows in n2 are operated sequentially by the Direct Digital Controller (DDC) in ascending order. Within the same row, the columns are operated sequentially by the DDC in ascending order, until n+1 units are operated. When n1 + (the number of even-numbered rows in n2) ≤ n+1 < n1 + n2, all even-numbered rows in n2 are operated. The odd-numbered rows in n2 are operated sequentially by the DDC in ascending order of row number. Within the same row, the columns are operated sequentially by the DDC in ascending order of column number.

[0034] (205) When n1+n2≤n+1<n1+n2+n3, first put all n1 and n2 units into operation, using "row" as the judgment rule example: First, count the number of units with odd row numbers and the number of units with even row numbers in n1+n2; Next, count the number of units with odd row numbers and the number of units with even row numbers in n3; (206) When the odd-numbered rows in n1+n2 are greater than or equal to the even-numbered rows, i.e., q≥0, then n3 runs the air source heat pumps in the odd-numbered rows; otherwise, n2 runs the air source heat pumps in the even-numbered rows. Taking the example of more even-numbered rows in n1+n2, compare n+1 with n1+n2+(the number of even-numbered rows in n3). When n+1 < n1+n2+(the number of even-numbered rows in n3), the even-numbered rows in n3 are operated sequentially by the Direct Digital Controller (DDC) in ascending order. Within the same row, the columns are operated sequentially by the DDC in ascending order, until n+1 units are operated. When n1+n2+(the number of even-numbered rows in n3) ≤ n+1 < n1+n2+n3, all even-numbered rows in n3 are operated. The odd-numbered rows in n3 are operated sequentially by the DDC in ascending order of row number. Within the same row, the columns are operated sequentially by the DDC in ascending order of column number.

[0035] ... The air source heat pumps will be fully operational until n+1=N.

[0036] (3) Optimization rule for n+1 < N: The n+1 units are adjusted according to the direct digital controller (DDC) control rate. The number of units to be put into operation is calculated based on the predicted load. During the entire commissioning process, the approximation between the set target and the actual feedback value is checked. Within the target hysteresis range, the current number of units is maintained, and no new units are put into operation.

[0037] Example 2 This embodiment provides a supplementary explanation of the control method in Embodiment 1, in conjunction with specific applications and data, as follows: A certain heating project is designed to provide heating to an area of ​​96,600 square meters. 2 The design heat load index is determined to be 40W / m². 2 Based on this, the design heating load for the project is calculated to be 3864kW. To meet this heating demand, the project is equipped with 36 GN-R155ML air source heat pumps. All air source heat pumps are arranged in a matrix layout, specifically in a 4x9 configuration. For detailed layout information, please refer to [link to relevant documentation]. Figure 1 .

[0038] Importing end-point scheduling curves into a Direct Digital Controller (DDC): The heating end is a radiator, T g = 0.0013T o 2 -0.4068T o + 41.063; The terminal is a fan coil unit, T g = 0.025T o 2 -1.3T o +35; T when the terminal is underfloor heating g = 0.01T o 2 -0.7T o + 33. Where T g The system supply water temperature (°C) is given by To, and the outdoor temperature (°C) is given by To. A load forecasting model (linear mechanism) is also imported into Q. o =Q s *(20-To) / 23.8, where Q o To calculate the system load (kW), Q s For the design load (3864 kW), T o The outdoor temperature is shown in °C. See Table 2 for details.

[0039] Table 2. Details of different parameters.

[0040] When the outdoor temperature is 2℃, the Direct Digital Controller (DDC) obtains the system water supply temperature T based on the terminal dispatch curve. g =0.0013*2 2 - 0.4068*2 + 41.063 = 40.2546. At this point, the system uses 40.3 (calculated system water supply temperature rounded to one decimal place) as the system target setpoint (SV). The system load Q is calculated based on the load forecasting model. o =3864*(20-2) / 23.8=2922.4kw; The heating load of the air source heat pump is obtained according to the air source heat pump heat load model. The power is 117.9 kW. Based on the above data, the number of air source heat pumps that are turned on is calculated to be n = 2922.4 / 117.9 = 24.8 ≈ 25, and n + 1 = 26 < 36.

[0041] During the initial operation of this project, all air source heat pumps have the same operating time of 0 hours. At this time, n1=36, n+1<n1. They are put into operation row by row, with 18 units in odd-numbered rows (q) and 18 units in even-numbered rows (o). Among n+1, q, and o, n+1 is the largest. Since q=o, q is put into operation first. That is, all 18 air source heat pumps in the first and third rows are put into operation. Simultaneously, the difference between the column number and the column number of the air source heat pumps in the second and fourth rows is calculated for each pair. The difference is recorded as one instance. The number of non-zero differences is counted as 8. The second row consists of 8 units put into operation in ascending order of column number. These units are then regulated by the Direct Digital Controller (DDC) and put into operation sequentially, for a total of 26 units. The approximation of the actual system water supply temperature to the system target setpoint (SV) is compared. If the approximation is within 0.5℃, the number of air source heat pump units is adjusted. If the approximation exceeds 0.5℃, the DDC control adjusts the number of units by adding or subtracting until the approximation is within 0.5℃.

[0042] The project has been running for some time. Assuming that the first row has been running for 570 hours, the second row for 450 hours, the third row for 230 hours, and the fourth row for 80 hours, then n1 = 18 units, n2 = 9 units, and n3 = 9 units. Therefore, n1 + n2 > n + 1 = 26 > n1. All units in the third and fourth rows are in operation. For the first row, first count the number of units with odd row numbers (9 units) and even row numbers (9 units) in n1; then count the number of units with odd row numbers (9 units) and even row numbers (0 units) in n2. When the number of odd rows in n1 is greater than or equal to the number of even rows, i.e., q ≥ 0, then the air source heat pumps in the odd rows of n2 are in operation, which means the air source heat pumps in the first row (8 units) are in operation. The units in the first row are put into operation sequentially by the Direct Digital Controller (DDC) according to the column number from smallest to largest.

[0043] Example 3 Based on the same inventive concept, this application also provides a high-efficiency control device for a parallel operation system of air source heat pumps, which can be used to implement the control method described in the above embodiments, specifically including the following: The parameter acquisition and target setting module is used to acquire the current outdoor temperature, calculate and set the target water supply temperature of the system according to the preset heating terminal scheduling curve; The load forecasting and unit number calculation module is used to calculate the total system load based on the outdoor temperature and a preset heating load forecasting model. Q o Based on the outdoor temperature, the system target water supply temperature, and the preset heat pump heating load model, calculate the heating load of a single air source heat pump. And calculate the value based on the total system load.Q o Heating load of a single air source heat pump The basic target number of units put into operation was calculated. ; The equipment classification and scheduling module is used to obtain the cumulative running time of each air source heat pump in the system. Based on the minimum cumulative running time, all air source heat pumps are divided into several commissioning tiers according to a preset time interval. The dynamic commissioning module is used to sequentially control the air source heat pumps and their associated electric switching valves in the corresponding echelons according to the priority order of the commissioning echelons, based on the final target number of units to be commissioned.

[0044] Preferably, embodiments of this application also provide a specific implementation of an electronic device capable of implementing all steps of the efficient control method for the parallel operation system of the air source heat pump in the above embodiments. The electronic device specifically includes the following: Processor, memory, communications interface, and bus; The processor, memory, and communication interface communicate with each other via a bus; the communication interface is used to realize information transmission between server-side devices, metering devices, and user-side devices.

[0045] The processor is used to call the computer program in the memory. When the processor executes the computer program, it implements all the steps in the efficient control method of the air source heat pump parallel operation system in the above embodiments.

[0046] Embodiments of this application also provide a computer-readable storage medium capable of implementing all steps of the efficient control method for the parallel operation system of the air source heat pump described in the above embodiments. The computer-readable storage medium stores a computer program, which, when executed by a processor, implements all steps of the efficient control method for the parallel operation system of the air source heat pump described in the above embodiments. The computer-readable storage medium may be a disk, optical disk, read-only memory, random access memory, flash memory, portable hard disk, solid-state hard disk, or other tangible storage medium capable of storing program code and being read and executed by a processor.

[0047] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on its differences from other embodiments. In particular, hardware + program embodiments are relatively simple in description because they are fundamentally similar to method embodiments; relevant parts can be referred to the descriptions in the method embodiments.

[0048] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0049] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0050] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0051] This invention is not limited to the embodiments described above. The above description of specific embodiments is intended to illustrate and explain the technical solutions of this invention. The specific embodiments described above are merely illustrative and not restrictive. Without departing from the spirit and scope of the claims, those skilled in the art can make many specific modifications based on the teachings of this invention, and these modifications all fall within the scope of protection of this invention.

Claims

1. A highly efficient control method for a parallel operation system of an air source heat pump, characterized in that, include: S1. Obtain the current outdoor temperature, and calculate and set the target water supply temperature of the system according to the preset heating terminal scheduling curve; S2. Based on the outdoor temperature and the preset heating load prediction model, calculate the total system load. Q o ; Based on the outdoor temperature, the system target water supply temperature, and the preset heat pump heating load model, the heating load of a single air source heat pump is calculated. And calculate the value based on the total system load. Q o Heating load of a single air source heat pump The basic target number of units put into operation was calculated. ; S3. Obtain the cumulative running time of each air source heat pump in the system, and divide all air source heat pumps into several commissioning tiers according to the minimum cumulative running time and the preset time interval. S4. Based on the final target number of units to be put into operation, and in accordance with the priority order of the operation teams, the direct digital controller sequentially controls the air source heat pumps and their associated electric switching valves in the corresponding teams to be put into operation.

2. The efficient control method according to claim 1, characterized in that, The final target number of units to be put into operation is: ;like Greater than or equal to the total number of air source heat pumps in the system Then all air source heat pumps will be put into operation.

3. The efficient control method according to claim 1, characterized in that, In step S3, the preset time interval is 200h.

4. The efficient control method according to claim 1, characterized in that, The air source heat pumps in the system are arranged in a matrix and assigned corresponding row and column numbers; In step S4, within the same commissioning phase, the direct digital controller is commissioned according to the following logic: Count the number of air source heat pumps with odd-numbered line numbers in the current tier. Even number of tables Based on the number of units to be put into operation and , Based on the size relationship, prioritize the row with more units in the odd-numbered rows or the row with more units in the even-numbered rows; within the same row, execute the units in ascending order of column number.

5. The efficient control method according to claim 1, characterized in that, After commissioning, the actual water supply temperature of the system is monitored in real time. When the difference between the actual water supply temperature and the system's target water supply temperature exceeds the preset hysteresis range, the number of units put into operation is increased or decreased. The preset hysteresis range is... ℃.

6. The efficient control method according to claim 1, characterized in that, When the direct digital controller issues a start command, it first opens the corresponding electric switch valve and starts the air source heat pump after a first preset time delay; when it issues a stop command, it first shuts down the air source heat pump and shuts down the corresponding electric switch valve after a second preset time delay; both the first and second preset times are 10s.

7. A high-efficiency control device for a parallel operation system of air source heat pumps, the parallel operation system comprising several air source heat pumps each with a control box, each air source heat pump having an interface on one side of its bottom connected to a water supply pipeline via a flow switch and an electric switching valve, and an interface on the other side connected to a return water pipeline; each control box and electric switching valve is connected to a direct digital controller, the direct digital controller also being connected to a temperature sensor; characterized in that, include: The parameter acquisition and target setting module is used to acquire the current outdoor temperature, calculate and set the target water supply temperature of the system according to the preset heating terminal scheduling curve; The load forecasting and unit number calculation module is used to calculate the total system load based on the outdoor temperature and a preset heating load forecasting model. Q o ; Based on the outdoor temperature, the system target water supply temperature, and the preset heat pump heating load model, the heating load of a single air source heat pump is calculated. And calculate the value based on the total system load. Q o Heating load of a single air source heat pump The basic target number of units put into operation was calculated. ; The equipment classification and scheduling module is used to obtain the cumulative running time of each air source heat pump in the system. Based on the minimum cumulative running time, all air source heat pumps are divided into several commissioning tiers according to a preset time interval. The dynamic commissioning module is used to sequentially control the air source heat pumps and their associated electric switching valves in the corresponding echelons according to the priority order of the commissioning echelons, based on the final target number of units to be commissioned.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the efficient control method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the efficient control method according to any one of claims 1 to 6.

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