Air source heat pump system control method, equipment, device and medium

Abstract

The invention discloses an air source heat pump system control method, system and device and a storage medium. The method comprises the steps that the water supply temperature and the water return temperature of an air source heat pump system, the environment temperature of an outdoor environment, the indoor temperature of the air source heat pump system and the instantaneous change rate of system loads are obtained; according to the water supply temperature, the water return temperature, the environment temperature, the indoor temperature and the instantaneous change rate, the load fluctuation rate is determined; and according to the load fluctuation ratio, the air source heat pump system is controlled to conduct mode switching. The air source heat pump can be widely applied to the technical field of air source heat pumps.

Description

Technical Field

[0001] The present application relates to the technical field of air source heat pumps, and in particular to an air source heat pump system control method, equipment, device and storage medium. Background Art

[0002] As an efficient, energy-saving and environmentally friendly heating and cooling equipment, air source heat pump system is widely used in building HVAC systems around the world. Traditional air source heat pump system adjusts the supply water temperature and return water temperature through variable frequency control of the compressor to meet the heat load requirements of different terminal equipment. However, a common problem of existing systems is that for different terminal application scenarios, a single control method often makes it difficult to take into account both response speed and energy efficiency optimization.

[0003] Generally, the compressor frequency control of an air source heat pump is mainly based on two methods: outlet water temperature control mode and return water temperature control mode. The outlet water temperature control mode can quickly respond to changes in the system load and is suitable for scenarios where user demand fluctuates drastically. The return water temperature control mode smoothly adjusts the supply and return water temperature difference of the system, which is suitable for scenarios with relatively stable loads and can better optimize energy efficiency. However, when a single control method is faced with complex and changeable application scenarios, the control accuracy of the air source heat pump decreases due to the presence of various parameters in complex scenarios that can affect the control of the air source heat pump. Therefore, it is recognized that there are technical problems that need to be solved in the relevant technology. Summary of the invention

[0004] The purpose of this application is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0005] To this end, an object of an embodiment of the present application is to provide an air source heat pump system control method, system, device and storage medium, which can improve the control accuracy of the air source heat pump system.

[0006] In order to achieve the above-mentioned technical objectives, the technical solutions adopted in the embodiments of the present application include: a method for controlling an air source heat pump system, comprising: obtaining the supply water temperature, return water temperature, ambient temperature of the outdoor environment, indoor temperature of the air source heat pump system and the instantaneous change rate of the system load; determining the load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate; and controlling the air source heat pump system to switch modes according to the load fluctuation rate.

[0007] In addition, the air source heat pump system control method according to the above embodiment of the present invention may also have the following additional technical features:

[0008] Further, in the embodiment of the present application, the load fluctuation rate is determined according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate, specifically including:

[0009] Determining a temperature deviation of system water supply according to the water supply temperature;

[0010] Determining a return water temperature deviation value according to the return water temperature;

[0011] Determining an environmental impact value according to the ambient temperature and the indoor temperature;

[0012] The load fluctuation rate is determined according to the temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value.

[0013] Further, in the embodiment of the present application, determining the temperature deviation of the system water supply according to the water supply temperature specifically includes:

[0014] Subtracting the water supply temperature from the set temperature of the air source heat pump to obtain a first temperature difference;

[0015] The absolute value of the first temperature difference is used as the temperature deviation of the system supply water.

[0016] Further, in the embodiment of the present application, determining the return water temperature deviation value according to the return water temperature specifically includes:

[0017] Subtracting the return water temperature from the set temperature of the air source heat pump to obtain a second temperature difference;

[0018] The absolute value of the second temperature difference is used as the return water temperature deviation value.

[0019] Further, in the embodiment of the present application, determining the environmental impact value according to the ambient temperature and the indoor temperature specifically includes:

[0020] Subtract the ambient temperature from the indoor temperature to obtain a third temperature difference;

[0021] The absolute value of the third temperature difference is used as the environmental impact value.

[0022] Further, in the embodiment of the present application, the load fluctuation rate is determined according to the temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value, specifically including:

[0023] The temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value are input into a first formula to determine the load fluctuation rate; wherein the first formula is:

[0024] L_wave=(∣ΔT_o∣+∣ΔT_r∣+ΔL_sys)÷(T_set+|Tx∣)

[0025] Among them, L_wave is the load fluctuation rate, |ΔT_o| is the temperature deviation, |ΔT_r| is the return water temperature deviation value, ΔL_sys is the instantaneous change rate, |Tx| is the environmental impact value, and T_set is the set temperature of the air source heat pump.

[0026] Further, in the embodiment of the present application, controlling the air source heat pump system to switch modes according to the load fluctuation rate specifically includes:

[0027] When the load fluctuation rate is greater than a first preset threshold, controlling the air source heat pump system to switch to a water outlet temperature control mode;

[0028] When the load fluctuation rate is less than the second preset threshold and the duration is greater than the third time threshold, the air source heat pump system is controlled to switch to the return water temperature control mode.

[0029] On the other hand, the embodiment of the present application also provides an air source heat pump system control device, including:

[0030] The first processing unit is used to obtain the supply water temperature, return water temperature, ambient temperature of the outdoor environment, indoor temperature of the air source heat pump system and instantaneous change rate of the system load;

[0031] a second processing unit, configured to determine a load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate;

[0032] The third processing unit is used to control the air source heat pump system to switch modes according to the load fluctuation rate.

[0033] On the other hand, the present application also provides an air source heat pump system control device, comprising:

[0034] at least one processor;

[0035] at least one memory for storing at least one program;

[0036] When the at least one program is executed by the at least one processor, the at least one processor implements an air source heat pump system control method as described in any one of the invention contents.

[0037] In addition, the present application also provides a computer-readable storage medium, which stores processor-executable instructions. When the processor-executable instructions are executed by the processor, they are used to execute an air source heat pump system control method as described in any of the above items.

[0038] The advantages and benefits of the present application will be partially given in the following description, and partially become apparent from the following description, or be understood through the practice of the present application:

[0039] The present application can obtain the water supply temperature, return water temperature, ambient temperature of the outdoor environment, indoor temperature of the air source heat pump system, and instantaneous rate of change of the system load of the air source heat pump system; determine the load fluctuation rate according to the water supply temperature, return water temperature, ambient temperature, indoor temperature, and instantaneous rate of change; and control the air source heat pump system to switch modes according to the load fluctuation rate. The present application fully considers parameters such as the water supply temperature, return water temperature, ambient temperature of the outdoor environment, indoor temperature of the air source heat pump system, and instantaneous rate of change of the system load, calculates the load fluctuation rate through the above parameters, and controls the air source heat pump system to switch modes through the load fluctuation rate. This method can improve the control accuracy of the air source heat pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 A schematic diagram of the steps of an air source heat pump system control method in a specific embodiment of the present invention;

[0041] Figure 2 It is a schematic diagram of the steps of determining the load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate in a specific embodiment of the present invention;

[0042] Figure 3 It is a schematic diagram of the steps of determining the temperature deviation of the system water supply according to the water supply temperature in a specific embodiment of the present invention;

[0043] Figure 4 It is a schematic diagram of the steps of determining the return water temperature deviation value according to the return water temperature in another specific embodiment of the present invention;

[0044] Figure 5 A schematic diagram of the steps of determining the environmental impact value according to the ambient temperature and the indoor temperature in another specific embodiment of the present invention;

[0045] Figure 6 It is a structural schematic diagram of an air source heat pump system control device in a specific embodiment of the present invention;

[0046] Figure 7 It is a structural schematic diagram of an air source heat pump system control device in a specific embodiment of the present invention. DETAILED DESCRIPTION

[0047] The principles and processes of the air source heat pump system control method, equipment, device and storage medium in the embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0048] As an efficient, energy-saving and environmentally friendly heating and cooling equipment, air source heat pump system is widely used in building HVAC systems around the world. Traditional air source heat pump system adjusts the supply water temperature and return water temperature through variable frequency control of the compressor to meet the heat load requirements of different terminal equipment. However, a common problem of existing systems is that for different terminal application scenarios, a single control method often makes it difficult to take into account both response speed and energy efficiency optimization.

[0049] Generally, the compressor frequency control of air source heat pumps is mainly based on two methods: outlet water temperature control mode and return water temperature control mode. Outlet water temperature control can quickly respond to changes in system load and is suitable for scenarios where user demand fluctuates drastically; return water temperature control is suitable for scenarios where the load is relatively stable by smoothly adjusting the supply and return water temperature difference of the system, and can better optimize energy efficiency. However, a single control method is often difficult to achieve ideal results when facing complex and changeable application scenarios. For example, although outlet water temperature control can quickly respond to load fluctuations, due to frequent compressor start and stop and high operating frequency, it is easy to cause the system operation efficiency to decrease and aggravate equipment wear. Although return water temperature control can maintain good energy efficiency when the load is stable, when user demand changes drastically, the system responds slowly, which may affect the user's comfort experience.

[0050] Moreover, the existing air source heat pump control method lacks intelligent judgment of load fluctuations, and it is difficult to switch the control mode under different load conditions, resulting in the system being unable to strike a balance between response time and energy efficiency. Therefore, there are still technical problems that need to be solved in the relevant technology.

[0051] Reference Figure 1 The present application provides an air source heat pump system control method. The control method may include but is not limited to steps S101 to S103.

[0052] S101. Obtain the supply water temperature, return water temperature, outdoor environment temperature, indoor temperature of the air source heat pump system, and instantaneous rate of change of system load.

[0053] S102. Determine the load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate.

[0054] S103: Control the air source heat pump system to switch modes according to the load fluctuation rate.

[0055] It is understandable that the supply water temperature, the return water temperature, the ambient temperature of the outdoor environment, and the indoor temperature of the air source heat pump system can be detected by sensors. The instantaneous rate of change of the system load can be calculated by parameters such as the operating frequency of the compressor, the system pressure change rate, and the instantaneous rate of change of the return water temperature. The instantaneous rate of change of the return water temperature can be calculated by the return water temperature difference of the current cycle and the return water temperature difference of the previous cycle. The system pressure change rate can be calculated by the system pressure of the current cycle and the system pressure of the previous cycle. The operating frequency can be the operating frequency of the current cycle.

[0056] Further, refer to Figure 2 The step of determining the load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate may specifically include steps S201 to S204.

[0057] S201. Determine the temperature deviation of the system water supply according to the water supply temperature.

[0058] S202: Determine a return water temperature deviation value according to the return water temperature.

[0059] S203: Determine an environmental impact value according to the ambient temperature and the indoor temperature.

[0060] S204. Determine the load fluctuation rate according to the temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value.

[0061] It can be understood that the instantaneous change rate of this embodiment can be calculated by parameters such as the operating frequency of the compressor, the system pressure change rate, and the instantaneous change rate of the return water temperature. The instantaneous change rate of the return water temperature can be calculated by the return water temperature difference of the current cycle and the return water temperature difference of the previous cycle.

[0062] Further, refer to Figure 3 The step of determining the temperature deviation of the system water supply according to the water supply temperature may specifically include steps S301 and S302.

[0063] S301. Subtract the water supply temperature from the set temperature of the air source heat pump to obtain a first temperature difference.

[0064] S302: Taking the absolute value of the first temperature difference as the temperature deviation of the system water supply.

[0065] Specifically, the first temperature difference of this embodiment is obtained by the following formula:

[0066] ΔT_o=T1-T2

[0067] Among them, T1 is the water supply temperature, T2 is the set temperature, and ΔT_o is the first temperature difference.

[0068] Further, refer to Figure 4 The step of determining the return water temperature deviation value according to the return water temperature may specifically include steps S401 and S402.

[0069] S401. Subtract the return water temperature from the set temperature of the air source heat pump to obtain a second temperature difference.

[0070] S402: Taking the absolute value of the second temperature difference as the return water temperature deviation value.

[0071] Specifically, the second temperature difference of this embodiment is obtained by the following formula:

[0072] ΔT_r=T3-T2

[0073] Among them, T3 is the return water temperature, T2 is the set temperature, and ΔT_r is the second temperature difference.

[0074] Further, refer to Figure 5 The step of determining the environmental impact value according to the ambient temperature and the indoor temperature may specifically include steps S501 and S502.

[0075] S501. Difference the ambient temperature and the indoor temperature to obtain a third temperature difference.

[0076] S502: Taking the absolute value of the third temperature difference as the environmental impact value.

[0077] Specifically, the third temperature difference of this embodiment is obtained by the following formula:

[0078] Tx=T_env-T_room

[0079] Among them, T_env is the return water temperature, T_room is the set temperature, and Tx is the third temperature difference.

[0080] Further, in the embodiment of the present application, the step of determining the load fluctuation rate according to the temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value specifically includes:

[0081] Input the temperature deviation, return water temperature deviation value, instantaneous change rate and environmental impact value into the first formula to determine the load fluctuation rate. The first formula is:

[0082] L_wave=(∣ΔT_o∣+∣ΔT_r∣+ΔL_sys)÷(T_set+|Tx∣)

[0083] Among them, L_wave is the load fluctuation rate, |ΔT_o| is the temperature deviation, |ΔT_r| is the return water temperature deviation value, ΔL_sys is the instantaneous change rate, |Tx| is the environmental impact value, and T_set is the set temperature of the air source heat pump.

[0084] Further, in the embodiment of the present application, the step of controlling the air source heat pump system to switch modes according to the load fluctuation rate may specifically include step S601 or step S602.

[0085] S601. When the load fluctuation rate is greater than a first preset threshold, the air source heat pump system is controlled to switch to an outlet water temperature control mode.

[0086] S602: When the load fluctuation rate is less than the second preset threshold and the duration is greater than the third time threshold, the air source heat pump system is controlled to switch to the return water temperature control mode.

[0087] It is understandable that the third time threshold can be any time threshold set by the user. Specifically, it can be 15 minutes, 30 minutes, 60 minutes or other values. Similarly, the first preset threshold is also any value set by the user. The second preset threshold is also any value set by the user.

[0088] The specific calculation principle of this application is described below:

[0089] In order to achieve the above objectives, this application adopts the following technical solutions:

[0090] 1. The air source heat pump system includes at least the following main parts: Compressor: used to compress the refrigerant to a high temperature and high pressure state. Evaporator: absorbs heat from the ambient air. Condenser: transfers heat to the water system for heating or cooling through the terminal equipment. Water pump and circulation system: used to heat or cool the water and then transport it to the indoor terminal equipment. Sensor: used to collect parameters such as supply water temperature, return water temperature, ambient temperature, indoor temperature, etc. Control module: includes data acquisition unit, load fluctuation judgment module, switching control module, etc., which are used to judge the load status of the system and intelligently switch the control mode. Terminal equipment: mainly includes three terminal forms: floor heating, radiator and fan coil, which are suitable for different application scenarios.

[0091] 2. Data collection and load fluctuation judgment:

[0092] The air source heat pump system collects relevant data in real time through multiple sensors to determine the current load status of the system. The main monitored parameters include:

[0093] T_o (outlet water temperature): the current system water supply temperature.

[0094] T_r (return water temperature): the return water temperature of the current system.

[0095] T_set (set temperature): target temperature set by the user.

[0096] L_sys (system load status): real-time load calculated through system internal parameters such as pressure and flow.

[0097] T_env (ambient temperature): current outdoor ambient temperature.

[0098] T_room (indoor temperature): the actual temperature in the room.

[0099] Through the above parameters, the system can monitor the difference in supply and return water temperature, changes in ambient temperature, changes in indoor load and other information in real time.

[0100] 3. Calculation of load fluctuation rate:

[0101] In order to quantify the fluctuation of system load, the present application designs a calculation formula for load fluctuation rate, which comprehensively considers the difference between the system outlet water temperature and the return water temperature, the instantaneous change rate of system load and the impact of the external environment on the load.

[0102] The calculation formula of load fluctuation rate L_wave is as follows:

[0103] L_wave=(∣ΔT_o∣+∣ΔT_r∣+ΔL_sys)÷(T_set+∣T_env-T_room∣)

[0104] Among them, |ΔT_o| represents the absolute difference between the outlet water temperature and the set temperature, reflecting the temperature deviation of the system water supply; |ΔT_r| represents the absolute difference between the return water temperature and the set temperature, reflecting the deviation of the return water temperature from the set target; ΔL_sys represents the instantaneous change rate of the system load, which is usually calculated by parameters such as the operating frequency of the compressor and the system pressure change rate; the difference between T_env and T_room represents the impact of the external environment on the system load. This parameter can reflect the change in the system heating or cooling demand due to changes in the external temperature. The L_wave value calculated by the above formula can quantify the load fluctuation of the system. When L_wave exceeds the predetermined threshold, the system will be considered to be in a high load fluctuation state, otherwise it will be in a low load fluctuation state.

[0105] 4. Setting of load fluctuation threshold:

[0106] To distinguish between the high-load fluctuation and low-load fluctuation states of the system, this application designs two thresholds, L_thresh_high and L_thresh_low. L_thresh_high is the high-load fluctuation threshold. When L_wave is greater than L_thresh_high, the system load fluctuates greatly, and at this time the system will switch to the outlet water temperature control mode. L_thresh_low is the low-load fluctuation threshold. When L_wave is less than L_thresh_low and the duration exceeds the set value (such as 30 minutes), the system will switch to the return water temperature control mode.

[0107] The settings of the high-load fluctuation threshold and the low-load fluctuation threshold can be adjusted according to the actual application scenarios and requirements of the system. For example, in a fan coil system with large load fluctuations, a lower high-load threshold may need to be set to respond to load changes more quickly; while in a floor heating system, since its load is relatively stable, the threshold can be set higher.

[0108] 5. Automatic switching of control modes:

[0109] Based on the intelligent judgment of the load volatility, this application designs a set of logic for automatically switching control modes. The control logic is as follows:

[0110] Initial system load detection: When the system starts up, the control module calculates the current load volatility L_wave based on the real-time monitored temperature and load parameters, and compares it with the high-load fluctuation threshold L_thresh_high.

[0111] If L_wave > L_thresh_high, the system considers that the load fluctuates greatly. At this time, the system will preferentially switch to the outlet water temperature control mode, and the compressor frequency will increase rapidly to ensure a quick response to user needs.

[0112] If L_wave < L_thresh_high and the duration exceeds the set value, the system will switch to the return water temperature control mode to operate stably and optimize energy efficiency.

[0113] Response to load changes: When the system is running and the real-time calculated L_wave changes, the control module will automatically judge whether the system needs to switch the control mode.

[0114] When the system is in the return water temperature control mode and the load volatility suddenly rises, that is, L_wave > L_thresh_high, the system will immediately switch to the outlet water temperature control mode to ensure a quick response of the system when the user needs change.

[0115] When the system is in the outlet water temperature control mode and the load fluctuation rate gradually decreases below L_thresh_low, the system will slowly switch to the return water temperature control mode to maintain the efficient operation of the system.

[0116] 6. Switch smoothing:

[0117] In the process of switching the control mode, in order to avoid frequent starts and stops or unstable operation caused by frequent switching of the system, the present application also designs a smooth switching processing mechanism. During the switching process, the compressor frequency will be gradually adjusted to avoid sudden frequency changes causing system instability and reduced efficiency.

[0118] 7. Exception handling during switching:

[0119] If the load fluctuation rate changes frequently in a short period of time, the system will prioritize maintaining the current control mode and notify maintenance personnel to conduct inspections through an alarm mechanism.

[0120] In addition, the control method of the present application can also be used to control floor heating systems, radiator systems and fan coil systems.

[0121] In the floor heating system, the heating load is relatively stable, and the system does not need to respond frequently to changes in external temperature, so it is suitable to use return water temperature control. Through return water temperature control, the floor heating system can maintain an efficient and stable operating state, and users can enjoy a comfortable indoor temperature while minimizing energy consumption. When the system detects a sharp drop in outdoor temperature or a sudden increase in indoor heat load, the system will automatically switch to the outlet water temperature control mode to ensure that the heating effect is not affected.

[0122] The heat load fluctuation of the radiator system is more significant than that of floor heating, especially when the ambient temperature changes greatly, the user's heating demand will also fluctuate. In this application scenario, this application can switch to the water outlet temperature control mode in time when the indoor temperature changes rapidly through intelligent judgment of load fluctuations to cope with the drastic changes in heat load. When the indoor temperature gradually stabilizes, the system will switch to the return water temperature control mode to ensure efficient operation.

[0123] The fan coil system has the characteristics of rapid response, and the user's needs change frequently, so it is suitable to adopt the outlet water temperature control mode to meet the instantaneous needs. Through the control method of this application, the fan coil system can quickly switch to the outlet water temperature control mode when the load fluctuates greatly, ensuring that the compressor runs at a higher frequency and quickly provides cold / heat. When the load gradually stabilizes, the system will switch to the return water temperature control mode, reducing the frequent start and stop of the compressor and improving the overall energy efficiency.

[0124] In summary, this application has the following beneficial effects:

[0125] 1. The present application can improve the response speed. The present application detects load fluctuations in real time. When the system load changes rapidly, the present invention can quickly switch to the water outlet temperature control mode to improve the user experience.

[0126] 2. This application can optimize system energy efficiency. When the system load tends to be stable, this application can switch to the return water temperature control mode to avoid frequent start and stop of the compressor, extend the service life of the equipment, and significantly reduce energy consumption.

[0127] 3. This application can adapt to a variety of terminal devices. This application can flexibly adjust the control strategy according to the characteristics of the terminal devices (such as floor heating, radiators and fan coils) to ensure that the system can maintain optimal performance in different application scenarios.

[0128] 4. This application can realize the automatic switching of return water temperature control and outlet water temperature control in the air source heat pump system through an intelligent load fluctuation judgment control algorithm, which can adapt to the needs of different terminal devices, significantly improve the response speed and energy efficiency of the system, and is suitable for wide application in floor heating, radiators and fan coil systems. In practical applications, this application can effectively balance the response speed and energy efficiency of the system through real-time monitoring of load fluctuation rate and flexible application of switching strategies, which can greatly improve the overall performance of the air source heat pump system.

[0129] In addition, Figure 1 Corresponding to the method, refer to Figure 6 In an embodiment of the present application, an air source heat pump system control device is also provided. The device may include a first processing unit 1001 , a second processing unit 1002 , and a third processing unit 1003 .

[0130] The first processing unit 1001 is used to obtain the supply water temperature, return water temperature, outdoor environment temperature, indoor temperature of the air source heat pump system and instantaneous change rate of the system load.

[0131] The second processing unit 1002 is used to determine the load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate.

[0132] The third processing unit 1003 is used to control the air source heat pump system to switch modes according to the load fluctuation rate.

[0133] It should be noted that the acquisition unit can be any integrated circuit unit or microprocessor unit obtained by integrating a chip with processing functions and its peripheral circuits through existing integration technology. The first processing unit and the second processing unit can also be any integrated circuit module or microprocessor module obtained by integrating a chip with processing functions and its peripheral circuits through existing integration technology. The first processing unit and the second processing unit can also include one or more memories. One or more memories can be used to store the specific algorithm in this application.

[0134] In some embodiments of the present application, the first processing unit 1001 can be set in the same gateway or device with a processor as the second processing unit 1002. The specific device connection mode and device setting of the first processing unit 1001 and the second processing unit 1002 and the second processing unit 1002 and the third processing unit 1003 are not limited.

[0135] It should be noted that the contents of the above-mentioned air source heat pump system control method embodiment are all applicable to the present air source heat pump system control device embodiment, and the functions specifically implemented by the present air source heat pump system control device embodiment are the same as those of the above-mentioned air source heat pump system control method embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned air source heat pump system control method embodiment.

[0136] Corresponding to the method, the embodiment of the present application also provides an air source heat pump system control device, the specific structure of which can be referred to Figure 7 ,include:

[0137] At least one processor 1011.

[0138] At least one memory 1012 is used to store at least one program.

[0139] When at least one program is executed by at least one processor, the at least one processor implements the air source heat pump system control method.

[0140] The contents of the above method embodiments are all applicable to the present device embodiments. The functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0141] and Figure 1 Corresponding to the method, an embodiment of the present application further provides a computer-readable storage medium, which stores processor-executable instructions, and the processor-executable instructions are used to execute the air source heat pump system control method when executed by the processor.

[0142] The contents of the above-mentioned air source heat pump system control method embodiment are all applicable to the present storage medium embodiment. The functions specifically implemented by the present storage medium embodiment are the same as those of the above-mentioned air source heat pump system control method embodiment, and the beneficial effects achieved are also the same as those achieved by the above-mentioned air source heat pump system control method embodiment.

[0143] In some optional embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present application is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. The optional embodiment is expected, wherein the order of various operations can be changed and the sub-operation described as a part of a larger operation can be performed independently.

[0144] In addition, although the present application is described in the context of functional modules, it should be understood that, unless otherwise specified, one or more of the functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present application. More specifically, in view of the properties, functions, and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional techniques of the engineer. Therefore, those skilled in the art can implement the present application set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present application, which is determined by the full scope of the attached claims and their equivalents.

[0145] If the function is implemented in the form of 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 the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium and includes several programs to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0146] The logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable programs for implementing the logical functions, and may be embodied in any computer-readable medium for use by a program execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch and execute a program from a program execution system, device or apparatus), or in conjunction with such program execution systems, devices or apparatuses. For purposes of this specification, a "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by a program execution system, device or apparatus, or in conjunction with such program execution systems, devices or apparatuses.

[0147] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0148] It should be understood that the various parts of the present application can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable program execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0149] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0150] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

[0151] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the described embodiments. Technical personnel familiar with the field may make various equivalent modifications or substitutions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A control method for an air source heat pump system, characterized in that: The following steps are involved: Obtain the supply water temperature, return water temperature, outdoor ambient temperature, indoor temperature of the air source heat pump system, and instantaneous rate of change of system load; Determining a load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate; According to the load fluctuation rate, the air source heat pump system is controlled to perform mode switching.

2. The air source heat pump system control method according to claim 1, characterized in that: The determining of the load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate specifically includes: Determining a temperature deviation of system water supply according to the water supply temperature; Determining a return water temperature deviation value according to the return water temperature; Determining an environmental impact value according to the ambient temperature and the indoor temperature; The load fluctuation rate is determined according to the temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value.

3. The air source heat pump system control method according to claim 2, characterized in that: Determining the temperature deviation of the system water supply according to the water supply temperature specifically includes: Subtracting the water supply temperature from the set temperature of the air source heat pump to obtain a first temperature difference; The absolute value of the first temperature difference is used as the temperature deviation of the system supply water.

4. The air source heat pump system control method according to claim 2, characterized in that: Determining the return water temperature deviation value according to the return water temperature specifically includes: Subtracting the return water temperature from the set temperature of the air source heat pump to obtain a second temperature difference; The absolute value of the second temperature difference is used as the return water temperature deviation value.

5. The air source heat pump system control method according to claim 2, characterized in that: The determining of the environmental impact value according to the ambient temperature and the indoor temperature specifically includes: Subtract the ambient temperature from the indoor temperature to obtain a third temperature difference; The absolute value of the third temperature difference is used as the environmental impact value.

6. The air source heat pump system control method according to claim 2, characterized in that: The determining of the load fluctuation rate according to the temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value specifically includes: The temperature deviation, the return water temperature deviation value, the instantaneous change rate and the environmental impact value are input into a first formula to determine the load fluctuation rate; wherein the first formula is: L_wave=(∣ΔT_o∣+∣ΔT_r∣+ΔL_sys)÷(T_set+|Tx∣) Among them, L_wave is the load fluctuation rate, |ΔT_o| is the temperature deviation, |ΔT_r| is the return water temperature deviation value, ΔL_sys is the instantaneous change rate, |Tx| is the environmental impact value, and T_set is the set temperature of the air source heat pump.

7. The air source heat pump system control method according to claim 1, characterized in that: The controlling the air source heat pump system to switch modes according to the load fluctuation rate specifically includes: When the load fluctuation rate is greater than a first preset threshold, controlling the air source heat pump system to switch to a water outlet temperature control mode; When the load fluctuation rate is less than the second preset threshold and the duration is greater than the third time threshold, the air source heat pump system is controlled to switch to the return water temperature control mode.

8. An air source heat pump system control device, characterized in that: include: The first processing unit is used to obtain the supply water temperature, return water temperature, ambient temperature of the outdoor environment, indoor temperature of the air source heat pump system and instantaneous change rate of the system load; a second processing unit, configured to determine a load fluctuation rate according to the supply water temperature, the return water temperature, the ambient temperature, the indoor temperature and the instantaneous change rate; The third processing unit is used to control the air source heat pump system to switch modes according to the load fluctuation rate.

9. An air source heat pump system control device, characterized in that include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the air source heat pump system control method as described in any one of claims 1-7.

10. A computer-readable storage medium storing instructions executable by a processor, characterized in that: The processor-executable instructions are used to execute an air source heat pump system control method as described in any one of claims 1-7 when executed by the processor.

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