Intelligent integrated control system for waste heat recovery of swimming pool heat pump and domestic hot water

Abstract

The invention provides an intelligent integrated control system for waste heat recovery of a swimming pool heat pump and domestic hot water. The system comprises a data acquisition module, an energy efficiency evaluation and recovery decision module, an intelligent scheduling execution module and a heating mode optimization module. The waste heat availability is dynamically evaluated by monitoring heat pump operation parameters and the water tank thermal stratification state in real time, the system stability is judged in combination with the heat pump energy efficiency change trend and the water tank top temperature acceleration, and a three-way valve is intelligently controlled to switch a waste heat preheating path. In the waste heat recovery state, the waste heat participation degree is determined based on the temperature difference and flow of the plate heat exchanger, the main heating power is adjusted by combining the up-down temperature difference and the top temperature change trend of the water tank, and efficient, stable and energy-saving domestic hot water supply is achieved. The energy comprehensive utilization efficiency is remarkably improved, carbon emission is reduced, and the system is suitable for green buildings and smart energy scenes.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of heat pumps, and particularly relates to a waste heat recovery intelligent integrated control system for a swimming pool heat pump and domestic hot water. BACKGROUND

[0002] With the deepening development of energy saving and green building concepts, heat pump systems are widely used in swimming pool heating and domestic hot water supply fields due to their high efficient heat conversion capability. However, the traditional swimming pool heat pump generates a large amount of condensing waste heat during operation, and this part of heat is directly discharged to the environment through air cooling or water cooling, which is not effectively recycled, resulting in significant energy waste. At the same time, the domestic hot water system usually operates independently, and the cold water is heated separately by an electric heater or a gas boiler, and there is a lack of coordination between the two. In actual operation, the heating process of the swimming pool heat pump has obvious intermittency and load fluctuation, while the demand for domestic hot water presents periodicity and burstiness. The mismatch of these operating characteristics makes it difficult for the traditional control mode to achieve dynamic allocation and efficient recovery of heat energy. The existing waste heat recovery schemes generally use fixed temperature thresholds or simple logic trigger controls. When the swimming pool heat pump is in the heating state and the temperature of the domestic hot water is lower than the set threshold, the waste heat recovery is started. However, this "on-off" control method is difficult to adapt to changing loads and environmental conditions, resulting in limited energy efficiency improvement. In addition, the existing system lacks a real-time evaluation mechanism for the operating efficiency of the heat pump and a dynamic perception of the thermal stratification state of the water tank during waste heat recovery, and fails to fully utilize the energy output of the heat pump during the high-efficiency operation stage, and cannot judge the real heat absorption demand of the domestic hot water system, resulting in problems such as insufficient waste heat recovery or excessive energy transfer, further reducing the overall operating efficiency. SUMMARY

[0003] The purpose of the present application is to design a waste heat recovery intelligent integrated control system for a swimming pool heat pump and domestic hot water, which can maintain high energy efficiency operation under different loads and climate conditions, and reduce the overall energy consumption and carbon emissions of the system.

[0004] In order to achieve the above purpose, the present application provides a waste heat recovery intelligent integrated control system for a swimming pool heat pump and domestic hot water, which comprises: a data acquisition module for acquiring the compressor electric power of the swimming pool heat pump, the condenser outlet temperature, the refrigerant water flow rate, and the stratified water temperature at the bottom and top of the domestic hot water tank in real time; an energy efficiency evaluation and recovery decision module for dynamically calculating the current operating energy efficiency of the heat pump based on the data acquired by the data acquisition module, and judging whether the waste heat recovery condition is met and outputting a waste heat recovery decision signal in combination with the thermal stratification state of the water tank and the target water supply temperature; The intelligent scheduling execution module is configured to control actions of a three-way valve and a water inlet electromagnetic valve of the plate heat exchanger according to the waste heat recovery decision signal and heat pump energy efficiency stability information, so as to switch whether cold water flows through the plate heat exchanger for waste heat preheating; wherein the heat pump energy efficiency stability information includes a change trend of the heat pump energy efficiency and a change acceleration of the water tank top temperature. The heating mode optimization module is configured to dynamically adjust an output power of the main heating device according to a waste heat participation degree and a water tank thermal stability state in a waste heat recovery state, so as to realize efficient and stable heating of domestic hot water; wherein the waste heat participation degree is determined based on actual contribution of waste heat reflected by a heat exchange temperature difference and flow of the plate heat exchanger, and the water tank thermal stability state is represented according to a water tank upper and lower temperature difference and a top water temperature change trend.

[0005] Further, the data acquisition module includes a guide rail type power transmitter, a platinum resistance temperature sensor, a non-contact ultrasonic flowmeter and a plurality of thermistor sensors, which are respectively configured to acquire compressor electric power, condenser outlet temperature, refrigerant water flow and water tank upper and lower water temperatures, and are connected to the PLC controller through a bus for unified sampling and sliding average processing.

[0006] Further, the energy efficiency evaluation and recovery decision module comprehensively considers a current energy efficiency level of the heat pump, an adequate degree of low-temperature water at the bottom of the water tank and a degree to which the top temperature of the water tank approaches a target water supply temperature when judging waste heat recovery conditions, and introduces a penalty mechanism to avoid invalid recovery when approaching the set temperature.

[0007] Further, the intelligent scheduling execution module further detects a heat pump energy efficiency change rate and a water tank top temperature acceleration after receiving the waste heat recovery decision signal, and delays execution of the valve switching action if the system state fluctuates violently, so as to prevent frequent start and stop.

[0008] Further, the three-way valve controlled by the intelligent scheduling execution module is configured to switch a cold water path, so that the cold water selectively directly enters the domestic hot water tank or first flows through the plate heat exchanger for waste heat preheating and then enters the water tank.

[0009] Further, the heating mode optimization module divides a domestic hot water heating process into two stages of waste heat preheating and main heating in a waste heat recovery activated state, and dynamically adjusts a power output of the main heating device according to an actual contribution proportion of waste heat to total heating.

[0010] Further, the heating mode optimization module further introduces a thermal inertia buffer function, which is based on a water tank thermal stratification strength and a top water temperature change trend, and applies a lag response to main heating power adjustment, so as to improve system thermal stability.

[0011] Further, the data acquisition module performs moving average filtering on the temperature and flow signals to suppress instantaneous fluctuations and measurement noise, ensuring that the data output to the subsequent control module is time-continuous and stable.

[0012] Further, the energy efficiency evaluation and recovery decision module considers the deviation between the water tank top temperature and the preset water supply temperature as a negative penalty factor when calculating the feasibility of waste heat recovery, and reduces the priority of waste heat recovery when the top water temperature is closer to the target temperature, to avoid energy waste caused by overheating.

[0013] Further, the heating mode optimization module is configured with a temperature sensing unit for monitoring the temperature difference between the inlet and outlet of the cold and hot sides of the plate heat exchanger, and real-time evaluates the actual contribution of waste heat in combination with the refrigerant water flow information, to dynamically adjust the operating power of the main heating device.

[0014] The beneficial technical effects of the present application are at least the following points: To solve the above problems, the present application provides a waste heat recovery intelligent integrated control system for pool heat pump and domestic hot water, which builds a real-time monitoring network through multi-point temperature and flow sensors, accurately obtains the heat pump operating parameters and the thermal stratification state of the domestic water tank; On this basis, a heat pump energy efficiency function and a waste heat recovery scoring function are established to quantitatively judge the availability of waste heat; Then, combined with the dynamic scheduling algorithm with a penalty term, by analyzing the heat pump energy efficiency change rate and the water tank temperature acceleration, the problem of frequent start-stop of waste heat recovery control is effectively avoided, and stable operation of the system is ensured. In addition, the system proposes a waste heat participation rate and a thermal inertia buffer function in the heating mode, and through dynamic calculation of the power distribution of waste heat and main heater, the heating process of domestic hot water considers both energy efficiency and stability. The entire control logic is completed based on real-time feedback of energy efficiency evaluation results and system thermal response characteristics, which not only realizes the maximum recovery of pool heat pump waste heat, but also ensures the continuity and comfort of domestic hot water supply. The innovation of the present application lies in expanding the traditional threshold control to multi-dimensional intelligent decision control based on time dynamics, energy efficiency state and temperature change trend, realizing energy adaptive optimization between pool heat pump and domestic hot water system, maintaining high energy efficiency operation under different loads and climate conditions, significantly reducing system comprehensive energy consumption and carbon emissions, and having high engineering application value and popularization significance. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application is further illustrated by the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the following drawings.

[0016] Figure 1 The present application is a waste heat recovery intelligent integrated control system for pool heat pump and domestic hot water. DETAILED DESCRIPTION

[0017] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like component have the same or similar designations throughout the attached drawing figures. The embodiments described below are exemplary and are not intended to be limiting of the present application, unless otherwise explicitly indicated herein.

[0018] In one or more embodiments, as shown in Figure 1 An intelligent integrated control system for waste heat recovery of a pool heat pump and domestic hot water is disclosed, which comprises the following: A data acquisition module is used to acquire the compressor electric power of the pool heat pump, the condenser outlet temperature, the refrigerant water flow rate, and the stratified water temperature at the bottom and top of the domestic hot water tank in real time. The specific working steps of this module are to acquire and process the key parameters in the operation process of the pool heat pump and the domestic hot water system, including the heat pump load state, the condensing temperature, the water tank stratified temperature, and the circulating water flow rate. These data not only reflect the current system working efficiency and thermal distribution state, but also are the only basis for subsequent energy efficiency evaluation and waste heat recovery scheduling control. The running state of the heat pump compressor in the system is quantified by its electric power, which is monitored in real time by using a guide rail type electric power transmitter with instantaneous power output function. The transmitter is installed at the incoming line end of the heat pump main power supply line, and the output is an analog voltage signal, which is converted into an electric power sequence updated once per second after being sampled by the PLC, denoted as The condenser outlet temperature is measured by using a platinum resistance temperature sensor, which is pasted and installed on the surface of the condenser outlet pipeline, and the heat coupling performance is enhanced by using heat-conducting silicone grease. Its output signal is sampled every two seconds, and is converted into a condenser outlet temperature time sequence, denoted as The refrigerant water flow rate is collected by using a non-contact ultrasonic flow meter, which is installed in a clamping manner, and the measurement pipe section is located in the return water pipe section between the condenser and the plate heat exchanger, and the recorded flow rate is .

[0019] The domestic water tank adopts an upper and lower stratified temperature acquisition strategy, and one thermistor sensor is installed at each of the 1 / 3 height of the bottom and 5 cm below the water surface of the water tank to measure the bottom water temperature and the top water temperature, respectively, denoted as and This layout form can capture the degree of thermal stratification in the water tank, which helps to determine whether the thermal conditions for recovering waste heat are met. All sensors are connected to the PLC controller through a bus, and the controller sets a uniform sampling interval and performs sliding window smoothing processing on the continuous data to remove sudden values and noise interference, ensuring the continuity and usability of the subsequent data.

[0020] The moving average method for temperature and flow rate is shown below: ; in, This indicates the current temperature or flow rate value after processing. Indicates the first The original value of the sampled data is obtained, and the window length is fixed at 5 samples.

[0021] For example, if the data collected in a certain period is: kilowatt, Spend, tons per hour, Spend, If the system control logic determines that the heat pump is in a stable heating state and that there is obvious thermal stratification in the domestic water tank, it can be considered that the initial conditions for starting the waste heat recovery module are met, and the data is marked as recyclable and transmitted to other modules.

[0022] This module outputs a structured dataset: ; in, This refers to the real-time electrical power of the heat pump compressor. The condenser outlet temperature, This refers to the return water flow rate from the heat pump to the heat exchanger. and These represent the water temperature values ​​at the bottom and top of the tank, respectively. This dataset will serve as the sole input source for the energy efficiency assessment and recycling decision-making module to perform energy efficiency calculations and determine waste heat recovery strategies. It features high sampling accuracy, stable update frequency, and standardized structure, supporting the starting point of the entire system's intelligent control chain.

[0023] The energy efficiency assessment and recycling decision module is used to dynamically calculate the current operating energy efficiency of the heat pump based on the data acquired by the data acquisition module, and, in combination with the water tank thermal stratification status and the target water supply temperature, determine whether the conditions for waste heat recovery are met and output a waste heat recovery decision signal. This module aims to build an energy efficiency assessment and waste heat recovery optimization strategy calculation module adapted to the "pool heat pump-domestic hot water system coupled scenario" based on real-time data output from the data acquisition module. This module not only quantifies the current energy efficiency level of the heat pump system, but also, by combining the water temperature stratification characteristics of the domestic hot water system, performs real-time calculations on the feasibility, priority, and control boundaries of waste heat recovery behavior.

[0024] The input data is a structured data set provided by the data acquisition module. ,in, Indicates the compressor input power. Indicates the condenser outlet temperature. For the circulating refrigerant water flow rate, and These represent the temperatures at the bottom and top of the water tank, respectively, reflecting the tank's thermal stratification structure. The core of this module lies in establishing a dynamic heat pump energy efficiency function calculated based on real-time data. An optimized scoring function for waste heat recovery decision-making. The former assesses the heating efficiency under the current heat pump status, while the latter determines whether to initiate the waste heat recovery process based on the overall system conditions.

[0025] First, define the energy efficiency function. : ; This formula expresses the sensible heat output capacity on the condenser side achievable per unit input power. For the density of water, The specific heat capacity of water at constant pressure. This indicates the refrigerant flow rate per unit time. and The difference represents the effective heat input temperature difference of the condensation heat to the domestic water. This formula not only considers the heating efficiency of the heat pump itself, but also links the heat to the initial water temperature in the tank, making it more suitable for the needs of domestic hot water systems.

[0026] However, in parallel systems of swimming pool heat pumps and domestic hot water, a single energy efficiency assessment is insufficient to guide waste heat recovery operations; the following two factors must also be considered: Is the heat pump currently operating within its optimal heating range? Does the current domestic hot water system have low-temperature hot water as a target for waste heat recovery?

[0027] Therefore, a waste heat recovery scoring function is introduced. The definition is as follows: ; in, This indicates the degree of thermal stratification inside the water tank, reflecting whether the tank has sufficient low-temperature water. The target supply temperature for domestic hot water (e.g., 55 degrees Celsius). As a penalty factor, it limits the energy waste caused by continuing to heat when the temperature at the top of the water tank is close to the target temperature.

[0028] Scoring function By combining "high energy efficiency + strong heat stratification" as positive conditions and introducing "already close to the set temperature" as a negative penalty, this design is fully designed for the structural characteristics of "central water supply - top temperature sensing" in domestic hot water systems, avoiding the energy waste problem of "continuing to recover waste heat even when the temperature is sufficient".

[0029] This function updates every 10 seconds. The controller records 3 consecutive times. Greater than the threshold In this case, the startup command can be output. Otherwise set to All judgments rely on the moving average stationary value to avoid erroneous actions triggered by single-point abnormal fluctuations.

[0030] Taking actual working conditions as an example: Let's assume... kilowatt, tons / hour Spend, Spend, Spend, Degree, substituting it in, we can get , The square of the temperature difference deviation is .like ,but If the value is significantly higher than the system's default threshold of 40, the system will identify it as a "high recovery potential" condition and automatically output [indicators]. .

[0031] This module outputs two data items: Real-time energy efficiency ratio Provides quantitative indicators of system operating efficiency; Waste heat recovery decision signals : The key signal for controlling the operation of the three-way valve and switching the heat exchange process.

[0032] This module enables real-time quantitative judgment on whether a heat pump is worthwhile for waste heat recovery, rather than the traditional binary control based on temperature thresholds. This avoids problems such as insufficient waste heat utilization or excessive intervention in the main system. By introducing a recovery scoring function with a penalty term, the system can fully utilize the temperature structure information of the domestic hot water system itself to achieve a dynamic waste heat utilization strategy that truly fits the application scenario.

[0033] The intelligent scheduling and execution module is used to control the operation of the three-way valve and the plate heat exchanger inlet solenoid valve according to the waste heat recovery decision signal and the heat pump energy efficiency stability information, so as to switch whether cold water flows through the plate heat exchanger for waste heat preheating; wherein the heat pump energy efficiency stability information includes the change trend of heat pump energy efficiency and the change acceleration of the water tank top temperature. This module will use the system energy efficiency index calculated in the previous step. Waste heat recovery control signal This module is applied to practical scheduling decisions, enabling intelligent switching and dynamic regulation of key control components in the domestic hot water preheating path. It is not only a crucial interface for translating judgment logic into execution operations, but also a key hub connecting the "heat pump energy efficiency status" and "domestic hot water load demand" within the entire system, forming an operational bridge for the intelligent integration of the heat pump and domestic hot water systems.

[0034] The inputs to this module are the two variables from the Energy Efficiency Assessment and Recycling Decision module: This indicates the current operating efficiency of the system; the higher the value, the higher the heat output per unit of input electrical energy. This is the waste heat recovery determination signal. A value of 1 indicates that the system is allowed to enter the recovery state, while a value of 0 indicates that normal operation is maintained. All the above variables are calculated in real time by the control system based on sampled data. The data update cycle does not exceed 10 seconds, and the control response cycle is set to 30 seconds to ensure the stability of the system response and its resistance to fluctuations.

[0035] To translate the aforementioned judgment signals into actual executable action control, this solution designs an integrated scheduling logic module. This module is responsible for dynamically deciding whether to open the three-way valve to introduce waste heat into the circuit, whether to activate the plate heat exchanger for preheating, and whether to maintain the current operating state based on the system status. The controlled objects include: the cold water inlet three-way electric valve; the plate heat exchanger inlet solenoid valve; the controller's internal status flags; and the waste heat regulation execution cycle scheduler.

[0036] When the integrated scheduling logic module is running, the system continuously checks the energy efficiency values ​​and control signal status of the past three times and performs a sliding stability assessment. A threshold is set. When the condition is met for 3 consecutive times and At this point, the controller outputs an execution signal to switch to the waste heat recovery path. To further optimize control robustness, this scheme proposes an improved state acknowledgment function, introducing a predictive jitter penalty term. This is to avoid frequent starts and stops caused by oscillations at the control boundary. The definition is as follows: ; in, It represents the instantaneous rate of change of system energy efficiency, reflecting the stability of the heat pump's operating state; It represents the acceleration of the temperature at the top of the water tank, used to capture the changing trend of the heat load state; and To adjust the weights, the actual values ​​were set to 0.5 and 1.2 through experiments. The significance of this formula is that when the system energy efficiency fluctuates rapidly, or the water tank temperature changes drastically, even if the current startup conditions are met, a penalty term will still apply. The system starts up with a large delay, only commencing operation after the system state has entered a stable range, thus effectively preventing control logic oscillations caused by frequent start-stop cycles.

[0037] Combination , and Construct the core control execution judgment function: ; in, For the final control execution signal, 1 indicates triggering the three-way valve to switch, allowing cold water to flow into the plate heat exchanger for waste heat preheating; 0 indicates maintaining the cold water direct flow to the domestic water tank, without waste heat exchange. This logic is a strategy layer encapsulation of the judgment results from the energy efficiency assessment and recovery decision module. Its innovation lies in no longer using a single threshold switch method, but introducing second-order dynamic information of the system state, and fine-tuning through combined penalty terms to improve the stability of the control response. It is particularly suitable for systems such as swimming pool heat pumps where load fluctuations and frequent power switching occur.

[0038] For example, if the system measures three times consecutively within a certain period of time... The values ​​are 4.2, 4.4, and 4.1 respectively, and The system determines that both efficiency and judgment conditions are met, but if at this time... It is already higher than the system setting. If this happens, the current decision will enter a delay state, and no control command will be issued. If after 10 seconds... The system immediately issued a warning after the value was reduced to 1.2. Upon receiving the switching command, the three-way valve switches to the preheating path, and the cold water enters the domestic water tank after being heated by the plate heat exchanger.

[0039] The output consists of two types of control signals: one is the three-way valve action control command. ,Depend on The mapping is as follows: the controller drives the valve motor according to the command status, and the entire switching process takes no more than 1 second; secondly, the system status record variables. It is used to record whether the system is currently in a waste heat recovery state, for use in subsequent heater load coordination and system operation log recording.

[0040] The heating mode optimization module is used to dynamically adjust the output power of the main heating device under waste heat recovery state, based on the degree of waste heat participation and the thermal stability state of the water tank, so as to achieve efficient and stable heating of domestic hot water. The degree of waste heat participation is determined based on the actual contribution of waste heat reflected by the heat exchange temperature difference and flow rate of the plate heat exchanger, and the thermal stability state of the water tank is represented by the temperature difference between the upper and lower parts of the water tank and the trend of the top water temperature change. This module dynamically adjusts the final heating mode of domestic hot water during waste heat recovery operation to ensure sufficient supply water temperature while avoiding energy waste and temperature shocks, thus achieving high efficiency and stability in the heating process. The implementation of this module relies on the control variables output from the previous stage of the scheduling system. System status record variables The former controls the three-way valve, while the latter indicates whether the system is currently in waste heat recovery mode. In addition, it is necessary to collect the temperatures of the upper and lower parts of the water tank in real time. and Current heat pump power and the temperature difference between the inlet and outlet water of the heat exchanger and It is used to calculate waste heat utilization rate and system heat distribution.

[0041] Regarding the data collection method, and The temperatures are collected by resistance thermometers fixedly installed at the top and bottom third of the height of the domestic hot water tank, with a sampling period of 2 seconds. Two sets of thermocouples are used for the inlet and outlet temperatures of the heat exchanger, positioned in the middle of the water pipes before and after the plate heat exchanger, and connected to the controller via an RS485 data acquisition module. The power is measured by the power transmitter on the compressor power supply circuit, and has been defined in the steps of the data acquisition module. The unit is kilowatt.

[0042] Activated in waste heat recovery mode ( and When the waste heat is released, the system will switch to "dual-source heating" mode. This means that the domestic chilled water is first preheated by a plate heat exchanger before entering the main heating device (such as an electric heater or a gas heating module) to achieve the target temperature. To ensure optimal efficiency and proper division of labor between the two sources, the system needs to calculate the waste heat participation rate in real time. Its definition is as follows: in, The current cold water flow rate of the plate heat exchanger is measured by an ultrasonic flow meter, and the unit is tons per hour. The instantaneous energy efficiency ratio (EER) of the main heating unit is usually obtained from factory parameters or system operation calibration. This formula means calculating the proportion of heat provided by waste heat in the domestic hot water supply per unit time, which is used as a benchmark for subsequent control of the main heater's power.

[0043] when When the temperature is high, it indicates that the waste heat energy has covered most of the heating demand. In this case, the main heater should reduce its output power to save energy; conversely, if... If the output is too low, the main heater output needs to be increased to make up for the heat shortfall. To prevent excessive system response due to short-term fluctuations in the heat pump or water temperature inertia, a thermal stability buffer function is proposed. As a hysteresis regulation variable for adjusting output power, it is defined as follows: in, This is the water tank thermal stratification intensity adjustment coefficient, typically taken between 0.6 and 1.0. This is the temperature rise rate suppression coefficient, typically taken between 1.5 and 2.5. This function comprehensively considers the current temperature difference between the top and bottom of the water tank and the temperature change trend at the top. If the temperature difference in the water tank is too large and the temperature change at the top is slow (i.e.,...), it will suppress the temperature rise rate. If the power is too high, it means that the heat distribution is uneven and the temperature rise is not ideal, and the system needs to maintain or increase the power of the main heater; if If the output is too low, it indicates that the hot water is heating up too quickly, posing a risk of energy surplus. The output of the main heater should be reduced in a timely manner.

[0044] The controller uses the following logic to control the main heating power output: Let the main heating power... The baseline value is The actual output will be adjusted as follows: like and ,but ; like and If it is in the middle range, then ; like or ,but (Do not exceed the safety limit).

[0045] Taking a practical application as an example: the data collected within a certain period is tons / hour Spend, Spend, kilowatt, Substituting, we can get If at this time Spend, The temperature at the top is [degree], and the rate of change of the temperature at the top is [rate]. degrees / second, then If the system is set If the conditions of low thermal shock and high waste heat participation are met, the controller will reduce the main heating power to [a certain value]. To make the most of waste heat rather than additional energy.

[0046] This module outputs: 1) Main heater power adjustment value 1) As a control signal, it is sent to the variable frequency electric heating controller or heat pump module; 2) System thermal stability status indicator This data is used for subsequent energy consumption statistics and safe operation log recording. Both variables are updated in real time through the controller's internal communication interface and recorded to the data storage module.

[0047] This invention also provides an intelligent integrated control device for waste heat recovery of a swimming pool heat pump and domestic hot water, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the steps in the above embodiment of an intelligent integrated control system for waste heat recovery of a swimming pool heat pump and domestic hot water; or, when the processor executes the computer program, it implements the functions of each module in the above system embodiments.

[0048] For example, the computer program may be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program in the intelligent integrated control device for waste heat recovery of a swimming pool heat pump and domestic hot water.

[0049] The aforementioned intelligent integrated control device for waste heat recovery from swimming pool heat pumps and domestic hot water can be a computing device such as a desktop computer, laptop, handheld computer, or cloud server. This intelligent integrated control device for waste heat recovery from swimming pool heat pumps and domestic hot water may include, but is not limited to, a processor and a memory. Those skilled in the art will understand that the intelligent integrated control device for waste heat recovery from swimming pool heat pumps and domestic hot water may also include input / output devices, network access devices, and buses.

[0050] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASACs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the intelligent integrated control device for waste heat recovery of a swimming pool heat pump and domestic hot water, connecting various parts of the device via various interfaces and lines.

[0051] The memory can be used to store the computer program and / or modules. The processor, by running or executing the computer program and / or modules stored in the memory and calling the data stored in the memory, realizes various functions of the intelligent integrated control device for waste heat recovery of swimming pool heat pump and domestic hot water. The memory may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function, etc.; the data storage area may store data created according to the operation of the air conditioning controller, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0052] The integrated module of the intelligent integrated control device for waste heat recovery of swimming pool heat pump and domestic hot water, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above-described embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various system embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0053] Those skilled in the art will understand that all or part of the processes in the systems described in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes described in the embodiments of the above systems. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0054] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A smart integrated control system for waste heat recovery from a swimming pool heat pump and domestic hot water, characterized in that, The system includes: The data acquisition module is used to acquire in real time the compressor power, condenser outlet temperature, refrigerant flow rate, and the stratified water temperature at the bottom and top of the domestic hot water tank of the pool heat pump. The energy efficiency assessment and recycling decision module is used to dynamically calculate the current operating energy efficiency of the heat pump based on the data acquired by the data acquisition module, and, in combination with the water tank thermal stratification status and the target water supply temperature, determine whether the conditions for waste heat recovery are met and output a waste heat recovery decision signal. The intelligent scheduling and execution module is used to control the operation of the three-way valve and the plate heat exchanger inlet solenoid valve according to the waste heat recovery decision signal and the heat pump energy efficiency stability information, so as to switch whether cold water flows through the plate heat exchanger for waste heat preheating; wherein the heat pump energy efficiency stability information includes the change trend of heat pump energy efficiency and the change acceleration of the water tank top temperature. The heating mode optimization module is used to dynamically adjust the output power of the main heating device under waste heat recovery conditions, based on the degree of waste heat participation and the thermal stability of the water tank, so as to achieve efficient and stable heating of domestic hot water. The degree of waste heat participation is determined based on the actual contribution of waste heat reflected by the heat exchange temperature difference and flow rate of the plate heat exchanger, and the thermal stability of the water tank is represented by the temperature difference between the upper and lower parts of the water tank and the trend of the top water temperature change.

2. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, The data acquisition module includes a rail-mounted power transmitter, a platinum resistance temperature sensor, a non-contact ultrasonic flow meter, and multiple thermistor sensors, which are used to collect compressor power, condenser outlet temperature, refrigerant flow rate, and water temperature at the top and bottom of the water tank, respectively. The data is then connected to a PLC controller via a bus for unified sampling and moving average processing.

3. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, When determining waste heat recovery conditions, the energy efficiency assessment and recovery decision module comprehensively considers the current energy efficiency level of the heat pump, the sufficiency of low-temperature water at the bottom of the water tank, and the degree to which the temperature at the top of the water tank is close to the target supply water temperature. It also introduces a penalty mechanism to prevent ineffective recovery from continuing when the temperature is close to the set temperature.

4. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, After receiving the waste heat recovery decision signal, the intelligent scheduling execution module further detects the heat pump energy efficiency change rate and the temperature acceleration at the top of the water tank. If the system status fluctuates drastically, the valve switching action is delayed to prevent frequent start-stop.

5. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, The three-way valve controlled by the intelligent scheduling execution module is used to switch the cold water path, allowing it to selectively enter the domestic hot water tank directly or first flow through the plate heat exchanger for waste heat preheating before entering the water tank.

6. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, When the waste heat recovery is activated, the heating mode optimization module divides the domestic hot water heating process into two stages: waste heat preheating and main heating. It also dynamically adjusts the power output of the main heating device based on the actual contribution ratio of waste heat to the total heating amount.

7. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, The heating mode optimization module also introduces a thermal inertia buffer function, which applies a hysteresis response to the main heating power adjustment based on the intensity of thermal stratification in the water tank and the trend of top water temperature change, so as to improve the thermal stability of the system.

8. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, The data acquisition module performs moving average filtering on the temperature and flow signals to suppress instantaneous fluctuations and measurement noise, ensuring that the data output to the subsequent control module has temporal continuity and stability.

9. The intelligent integrated control system for waste heat recovery from swimming pool heat pump and domestic hot water according to claim 1, characterized in that, When calculating the feasibility of waste heat recovery, the energy efficiency assessment and recovery decision module uses the deviation between the top temperature of the water tank and the preset water supply temperature as a negative penalty factor. When the top water temperature is closer to the target temperature, the priority of waste heat recovery is reduced to avoid energy waste caused by overheating.

10. The intelligent integrated control system for waste heat recovery of swimming pool heat pump and domestic hot water according to claim 1, characterized in that, The heating mode optimization module is equipped with a temperature sensing unit for monitoring the temperature difference between the inlet and outlet of the plate heat exchanger on the hot and cold sides, and combines the chilled water flow information to evaluate the actual contribution of waste heat in real time, and dynamically adjust the operating power of the main heating device accordingly.

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