Control method for air conditioning heat recovery system, air conditioning heat recovery system and computer-readable storage medium

Abstract

This application provides a control method for an air conditioning heat recovery system, an air conditioning heat recovery system, and a computer-readable storage medium. The method includes: acquiring the current water temperature of the water heater and the indoor ambient temperature; determining the operating mode of the air conditioning heat recovery system based on the water temperature and the indoor ambient temperature; a first operating mode where the air conditioner is in cooling mode and not heating the water heater; a second operating mode where the air conditioner is in cooling mode and all the heat released by the refrigerant is used to heat the water heater; and a third operating mode where the air conditioner is in cooling mode and part of the heat released by the refrigerant is used to heat the water heater; and controlling the air conditioning heat recovery system to operate in the specified operating mode. This method, through switching between multiple operating modes, can intelligently regulate the indoor temperature while recovering condensed heat to pre-store domestic hot water, achieving effective utilization of the entire house's thermal energy.

Description

Technical Field

[0001] This application relates to the field of air conditioning control, and more specifically, to a control method for an air conditioning heat recovery system, an air conditioning heat recovery system, and a computer-readable storage medium. Background Technology

[0002] During summer and transitional seasons, air conditioning systems generate a significant amount of waste heat during the cooling process. Currently, the condensation heat generated by air conditioning systems in cooling mode is extremely high, approximately 1.3 times the cooling capacity. If air conditioners are run for extended periods, the resulting large amounts of waste heat, directly released into the atmosphere, not only represents a huge waste of energy but also causes thermal pollution and exacerbates the urban heat island effect. Summary of the Invention

[0003] The main objective of this application is to provide a control method for an air conditioning heat recovery system, an air conditioning heat recovery system, and a computer-readable storage medium, so as to at least solve the problem in the prior art that air conditioners generate a large amount of waste heat when running for a long time, which not only causes huge energy waste but also causes thermal pollution to the environment.

[0004] To achieve the above objectives, according to one aspect of this application, a control method for an air conditioning heat recovery system is provided. The air conditioning heat recovery system includes an air conditioner and a water heater. The water heater includes a water tank. The inlet of the water tank is connected to the compressor and the exhaust port of a four-way valve of the air conditioner via pipelines. The outlet of the water tank is connected to the evaporator in the indoor unit and the condenser in the outdoor unit of the air conditioner via pipelines. The method includes: acquiring the water temperature of the water heater and the indoor ambient temperature at the current moment; determining the operating mode of the air conditioning heat recovery system based at least on the water temperature of the water heater and the indoor ambient temperature. The operating mode includes a first operating mode, a second operating mode, and a third operating mode. The first operating mode is a mode where the air conditioner is in cooling mode and does not heat the water heater. The second operating mode is a mode where the air conditioner is in cooling mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The third operating mode is a mode where the air conditioner is in cooling mode and part of the heat released by the refrigerant of the air conditioner is used to heat the water heater. The method also includes controlling the air conditioning heat recovery system to operate in the specified operating modes.

[0005] Optionally, if the indoor ambient temperature is greater than or equal to a preset ambient temperature, the operating mode of the air conditioning heat recovery system is determined based at least on the water temperature of the water heater and the indoor ambient temperature. This includes: determining the operating mode of the air conditioning heat recovery system as the first operating mode when the water temperature of the water heater is greater than or equal to a first preset water temperature; determining the operating mode of the air conditioning heat recovery system as the second operating mode when the water temperature of the water heater is less than a second preset water temperature but greater than or equal to a third preset water temperature, wherein the second preset water temperature is less than the first preset water temperature and the third preset water temperature is less than the second preset water temperature; and determining the operating mode of the air conditioning heat recovery system as the third operating mode when the water temperature of the water heater is less than the third preset water temperature, or when the water temperature of the water heater is greater than or equal to the second preset water temperature but less than the first preset water temperature.

[0006] Optionally, controlling the air conditioning heat recovery system to operate in the operating mode includes: determining the current operating mode of the air conditioning heat recovery system; when the air conditioning heat recovery system is operating in the second operating mode or the third operating mode, detecting the indoor ambient temperature in real time; when the indoor ambient temperature is greater than or equal to a preset ambient temperature, controlling the air conditioning heat recovery system to operate in the current operating mode; when the indoor ambient temperature is less than the preset ambient temperature, determining an updated operating mode of the air conditioning heat recovery system based on the water temperature and time difference of the water heater, wherein the time difference is the time difference between the current time and the target water usage time, and the target water usage time is a preset time for the user to use the water heater.

[0007] Optionally, the operating mode further includes a fourth operating mode, where the air conditioner is in standby mode and all the heat released by the refrigerant is used to heat the water heater. The updated operating mode of the air conditioning heat recovery system is determined based on the difference between the water heater temperature and the time difference, including: determining the operating mode of the air conditioning heat recovery system as the third operating mode when the water heater temperature is lower than a fourth preset temperature, wherein the fourth preset temperature is higher than a second preset temperature and lower than a first preset temperature; determining the operating mode of the air conditioning heat recovery system as the first operating mode when the water heater temperature is greater than or equal to the fourth preset temperature and the time difference is greater than a preset difference; and determining the operating mode of the air conditioning heat recovery system as the fourth operating mode when the water heater temperature is greater than or equal to the fourth preset temperature and the time difference is less than or equal to the preset difference.

[0008] Optionally, controlling the air conditioning heat recovery system to operate in the operating mode includes: determining the fresh air exchange cycle; and controlling the compressor to exchange indoor air and outdoor air of the air conditioner according to the fresh air exchange cycle.

[0009] Optionally, the air conditioning heat recovery system further includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is installed on the pipe on the outlet side of the water tank, and the second electronic expansion valve is installed on the branch pipe connecting the water tank and the evaporator in the indoor unit of the air conditioner. Controlling the air conditioning heat recovery system to operate in the operating mode includes: when the operating mode is the third operating mode, obtaining the difference between the first preset water temperature and the water temperature of the water heater, and the difference between the indoor ambient temperature and the preset ambient temperature, to obtain the target water temperature difference and the target ambient temperature difference; and adjusting the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the target water temperature difference and the target ambient temperature difference.

[0010] Optionally, adjusting the opening of the first electronic expansion valve and the second electronic expansion valve according to the target water temperature difference and the target ambient temperature difference includes: obtaining a first mapping relationship and a second mapping relationship, wherein the first mapping relationship is a mapping relationship between the water temperature difference and the opening of the first electronic expansion valve, and the second mapping relationship is a mapping relationship between the ambient temperature difference and the opening of the second electronic expansion valve; determining the opening of the first electronic expansion valve according to the target water temperature difference and the first mapping relationship, wherein the target water temperature difference is positively correlated with the opening of the first electronic expansion valve; and determining the opening of the second electronic expansion valve according to the target ambient temperature difference and the second mapping relationship, wherein the target ambient temperature difference is positively correlated with the opening of the second electronic expansion valve.

[0011] According to another aspect of this application, an air conditioning heat recovery system is provided, comprising: a controller for executing a control method for any of the air conditioning heat recovery systems described above; an air conditioner including an indoor unit, an outdoor unit condenser, a four-way valve, and a compressor; and a water heater including a water tank, wherein the inlet of the water tank is connected to the compressor and the exhaust port of the four-way valve of the air conditioner respectively via pipelines, and the outlet of the water tank is connected to the evaporator in the indoor unit of the air conditioner and the outdoor unit condenser of the air conditioner respectively via pipelines.

[0012] Optionally, the air conditioning heat recovery system further includes: a first electronic expansion valve, which is installed on a pipe on the outlet side of the water tank; a second electronic expansion valve, which is installed on a branch pipe connecting the water tank and the evaporator in the indoor unit of the air conditioner; a first solenoid valve, which is installed on a branch pipe connecting the compressor and the exhaust port of the four-way valve; a second solenoid valve, which is installed on a pipe on the inlet side of the water tank; and a third solenoid valve, which is installed on a branch pipe connecting the water tank and the condenser of the outdoor unit of the air conditioner.

[0013] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the control methods of the air conditioning heat recovery system described above.

[0014] Applying the technical solution of this application, the control method of the aforementioned air conditioning heat recovery system first obtains the current water temperature of the water heater and the indoor ambient temperature; then, based at least on the water temperature of the water heater and the indoor ambient temperature, it determines the operating mode of the air conditioning heat recovery system. The operating modes include a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and not heating the water heater; the second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant is used to heat the water heater; and the third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant is used to heat the water heater. Finally, the air conditioning heat recovery system is controlled to operate in the specified operating mode. This method, through switching between multiple operating modes, can achieve temperature regulation of the indoor environment while meeting the user's needs during absence. It intelligently controls the indoor temperature while recovering condensation heat to store domestic hot water in advance, achieving effective utilization of the entire house's heat energy, improving energy efficiency, reducing the impact of the air conditioning system on the surrounding environment, and solving the problem in existing technologies where air conditioners generate a large amount of waste heat during prolonged operation, causing not only huge energy waste but also thermal pollution to the environment. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A hardware structure block diagram of a mobile terminal for performing a control method for an air conditioning heat recovery system according to an embodiment of this application is shown.

[0017] Figure 2A schematic diagram of the structure of an air conditioning heat recovery system according to an embodiment of this application is shown;

[0018] Figure 3 A schematic flowchart of a control method for an air conditioning heat recovery system according to an embodiment of this application is shown.

[0019] Figure 4 A schematic diagram illustrating the principle of a first operating mode of an air conditioning heat recovery system according to an embodiment of this application is shown.

[0020] Figure 5 A schematic diagram illustrating the principle of a second operating mode of an air conditioning heat recovery system according to an embodiment of this application is shown.

[0021] Figure 6 A schematic diagram illustrating the principle of a third operating mode of an air conditioning heat recovery system according to an embodiment of this application is shown.

[0022] Figure 7 A schematic diagram illustrating the principle of a fourth operating mode of an air conditioning heat recovery system according to an embodiment of this application is shown.

[0023] Figure 8 A schematic flowchart of another control method for an air conditioning heat recovery system according to an embodiment of this application is shown;

[0024] Figure 9 A schematic diagram of the structure of a controller provided according to an embodiment of this application is shown.

[0025] The above figures include the following reference numerals:

[0026] 11. Indoor unit; 12. Outdoor unit condenser; 13. Four-way valve; 14. Compressor; 15. Water tank; 21. First electronic expansion valve; 22. Second electronic expansion valve; 31. First solenoid valve; 32. Second solenoid valve; 33. Third solenoid valve; 34. Check valve; 102. Processor; 104. Memory; 106. Transmission equipment; 108. Input / output device. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0029] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0030] As described in the background section, with rapid socio-economic development and a significant improvement in people's living standards, more and more families are keeping pets, and pets have become important members of many families. When pets are exposed to high temperatures for extended periods, they will feel uncomfortable, exhibiting symptoms such as anxiety, irritability, and lethargy, which can seriously affect their health. Pet owners not only want to be with their pets at home but also want to provide them with a comfortable living environment while they are away. Therefore, more and more users need to keep their air conditioning on around the clock while away from home to provide a comfortable living environment for pets or certain special groups (such as those who cannot independently turn on and adjust the air conditioning).

[0031] However, existing air conditioners lack specific operating modes, requiring users to manually turn them on and set operating parameters before leaving home. This is not only cumbersome but also consumes a significant amount of electricity during prolonged operation, leading to increased electricity bills—a substantial expense for many families. Furthermore, due to the lack of intelligent control, air conditioners struggle to maintain a constant, comfortable environment during extended operation, especially in fluctuating weather conditions, where indoor temperature and humidity often fall short of ideal levels. Moreover, the prolonged operation of existing air conditioners generates substantial amounts of waste heat, which, when directly released into the atmosphere, not only represents a huge waste of energy but also contributes to environmental heat pollution, exacerbating the urban heat island effect.

[0032] To address the problem that air conditioners generate a large amount of waste heat when running for extended periods, which not only causes significant energy waste but also leads to thermal pollution, embodiments of this application provide a control method for an air conditioning heat recovery system, an air conditioning heat recovery system, and a computer-readable storage medium.

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0034] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a control method of an air conditioning heat recovery system according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0035] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the control method of the air conditioning heat recovery system in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one instance, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0036] This embodiment provides an air conditioning heat recovery system, such as Figure 2 As shown, the system includes: a controller (not shown) for executing any of the control methods of the above-described air conditioning heat recovery system; an air conditioner (not shown), which includes an indoor unit 11, an outdoor unit condenser 12, a four-way valve 13, and a compressor 14; and a water heater (not shown), which includes a water tank 15, the inlet of which is connected to the exhaust ports of the compressor 14 and the four-way valve 13 of the air conditioner via pipelines, and the outlet of which is connected to the evaporator in the indoor unit 11 and the outdoor unit condenser 12 of the air conditioner via pipelines.

[0037] During summer and transitional seasons, air conditioners generate a significant amount of waste heat during the cooling process, while water heaters consume energy to heat water. The aforementioned air conditioning heat recovery system integrates both the air conditioner and water heater, utilizing the waste heat from the air conditioner for water heating, thus greatly improving energy efficiency and reducing energy waste.

[0038] The controller coordinates and controls the operating logic between the air conditioner, water heater, and various components, ensuring efficient system operation in different modes, such as heat recovery in pet mode. The air conditioner, comprising an indoor unit 11 and an outdoor unit condenser 12, is the main equipment for cooling and heating. It also includes a four-way valve 13 and a compressor 14. The four-way valve changes the refrigerant flow direction according to the operating mode, while the compressor, the power source, compresses the refrigerant and circulates it within the system. The water heater mainly consists of a water tank 15. The water tank's inlet is connected via pipes to the compressor 14 and the exhaust port of the four-way valve 13. This means that in specific heat recovery modes, the water tank can directly receive the high-pressure, high-temperature refrigerant discharged from the compressor for heating the stored water. Pipes connect the water tank 15's outlet to the evaporator in the indoor unit 11 and the outdoor unit condenser 12, respectively. In the heat recovery mode (total heat recovery or partial heat recovery), when the refrigerant flows through the water tank 15, the heat energy in the refrigerant is absorbed by the water in the water tank, and the refrigerant is cooled down. Then it returns to the air conditioning system through the pipeline and continues to circulate between the evaporator and condenser to complete the cooling or heating process.

[0039] Additionally, the four-way valve, also known as a four-way reversing valve, is a key component in an air conditioning system used to change the direction of refrigerant flow. It typically has four ports: a suction port, connected to the compressor's suction end, where the refrigerant enters the compressor as low-pressure vapor; a discharge port, connected to the compressor's discharge end, where the refrigerant leaves the compressor as high-pressure vapor after compression and then flows to the condenser or other heat exchangers; an evaporator port, connected to the air conditioner's evaporator (usually part of the indoor unit). In cooling mode, the refrigerant enters the evaporator through this port, absorbing heat from the indoor air and lowering the room temperature; and a condenser port, connected to the air conditioner's condenser (usually part of the outdoor unit). In heating mode, the refrigerant enters the condenser through this port, releasing heat to heat the indoor air, or in heat recovery mode, transferring heat to the water heater.

[0040] In heat recovery mode, the condensation heat generated by the air conditioner during cooling (i.e., the heat carried by the refrigerant discharged from the compressor) is guided to the water tank 15 of the water heater. This waste heat is converted into heat energy of the water in the tank through pipes and a heat exchanger, thus producing hot water. The heat recovery efficiency depends on the matching of the water temperature in the tank and the heat recovery mode. The amount of refrigerant flowing into the tank can be controlled by adjusting the electronic expansion valve to achieve the best heat recovery effect.

[0041] The aforementioned air conditioning heat recovery system, through switching between multiple operating modes, can regulate indoor temperature while the user is away from home, periodically activate fresh air to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment. While intelligently regulating indoor temperature, it also recovers condensation heat to pre-store domestic hot water, achieving effective utilization of the entire house's heat energy, improving energy efficiency, and reducing the air conditioning system's impact on the surrounding environment.

[0042] By recovering waste heat generated during air conditioning cooling and using it to produce hot water, the energy consumption required for individual water heater heating is significantly reduced, lowering overall energy costs. It also reduces waste heat emissions into the atmosphere, contributing to environmental protection and mitigating the urban heat island effect. The synergistic operation of the air conditioner and water heater effectively utilizes heat energy that would otherwise be wasted, improving the overall system's energy efficiency and making the equipment more versatile, economical, and practical.

[0043] In some embodiments, such as Figure 2 As shown, the aforementioned air conditioning heat recovery system further includes: a first electronic expansion valve 21, which is installed on the pipe on the outlet side of the water tank 15; a second electronic expansion valve 22, which is installed on the branch pipe connecting the water tank 15 and the evaporator in the indoor unit 11 of the air conditioner; a first solenoid valve 31, which is installed on the branch pipe connecting the compressor 14 and the exhaust port of the four-way valve 13; a second solenoid valve 32, which is installed on the pipe on the inlet side of the water tank 15; and a third solenoid valve 33, which is installed on the branch pipe connecting the water tank 15 and the outdoor unit condenser 12 of the air conditioner.

[0044] Specifically, the first electronic expansion valve is installed on the pipe on the outlet side of the water tank 15 to regulate the water flow from the water tank to other parts of the system (such as the outdoor unit condenser or the indoor unit evaporator). More importantly, it regulates the refrigerant flow rate, as it is located on the refrigerant circulation path. In heat recovery mode, it can control the refrigerant flow rate according to set parameters, thus affecting the hot water heating process and the air conditioning cooling process. The second electronic expansion valve 22 is installed on the branch pipe connecting the water tank 15 and the evaporator in the indoor unit 11. Its function is to regulate the refrigerant flow rate from the water tank to the evaporator. In pet mode operation, the regulation of the second electronic expansion valve 22 helps maintain a comfortable indoor temperature while ensuring efficient hot water preparation. The first solenoid valve is installed on the branch pipe connecting the compressor 14 and the exhaust port of the four-way valve 13 to control the refrigerant flow from the compressor to the four-way valve. In heat recovery mode, the opening or closing of the first solenoid valve 31 directly affects whether a sufficient amount of refrigerant can be guided to the water tank for heat exchange. The second solenoid valve is installed on the pipe on the inlet side of the water tank 15 to control the flow rate of refrigerant entering the water tank. In heat recovery mode, the control of the second solenoid valve 32 determines the heating speed and efficiency of the water tank. The third solenoid valve is installed on the branch pipe connecting the water tank 15 and the condenser 12 of the outdoor unit of the air conditioner to control the refrigerant flow from the water tank to the condenser. In certain operating modes, such as partial heat recovery mode, this ensures that the system can effectively recover waste heat for hot water heating while maintaining the performance of air conditioning cooling.

[0045] In pet mode or any operating mode requiring heat recovery, these valves work in concert according to the controller's instructions. For example, in total heat recovery mode (second operating mode), the controller may require the second solenoid valve 32 to be closed while the valves related to heat exchange in the water tank (the first solenoid valve 31 and the third solenoid valve 33) are opened, and the flow rate is regulated using the first electronic expansion valve 21 and the second electronic expansion valve 22, so that all the condensation heat is used to heat the water in the water tank.

[0046] Through the combined control of electronic expansion valves and solenoid valves, the system can precisely adjust the operating status of each component according to actual needs, such as water temperature in the tank and indoor temperature, thereby optimizing heat recovery and air conditioning cooling effects. The intelligent control of electronic expansion valves and solenoid valves minimizes energy waste, ensuring that the overall energy consumption of the air conditioning system remains at a minimum while meeting pet comfort and user hot water needs.

[0047] In addition, such as Figure 2As shown, the air conditioning heat recovery system also includes a one-way valve 34. A one-way valve, also known as a check valve, is used to ensure that refrigerant or water flows only in one direction. In a heat recovery system, a one-way valve is typically installed in the hot water circulation loop to prevent hot water or refrigerant from flowing back in an undesirable direction, thus avoiding system malfunctions or efficiency reduction. By preventing refrigerant from flowing back under certain conditions, the one-way valve can prevent damage to the compressor or other parts of the system due to reverse flow, ensuring the safe operation of the entire system. In heat recovery mode, the one-way valve ensures that the high-temperature refrigerant discharged from the condenser can smoothly enter the heat exchanger and water tank without circulating or leaking within the system, thereby improving the efficiency of heat recovery and hot water heating.

[0048] This embodiment provides a control method for an air conditioning heat recovery system that runs on a mobile terminal, computer terminal, or similar computing device. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Also, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0049] like Figure 2 As shown, the air conditioning heat recovery system includes an air conditioner and a water heater. The water heater includes a water tank 15. The inlet of the water tank 15 is connected to the compressor 14 and the exhaust port of the four-way valve 13 of the air conditioner through pipelines. The outlet of the water tank 15 is connected to the evaporator in the indoor unit 11 of the air conditioner and the condenser 12 in the outdoor unit of the air conditioner through pipelines. Figure 3 This is a flowchart of a control method for an air conditioning heat recovery system according to an embodiment of this application. Figure 3 As shown, the method includes the following steps:

[0050] Step S201: Obtain the water temperature of the water heater and the indoor ambient temperature at the current moment;

[0051] Specifically, the system uses dedicated sensors or thermometers to monitor the temperature of the water inside the water heater tank. These sensors typically provide accurate temperature readings, ensuring the controller knows the current hot water temperature. This temperature information is crucial for deciding whether to activate heat recovery mode (using waste heat from the air conditioner to heat the water in the water heater). Similarly, the system uses a temperature sensor placed indoors to obtain the current ambient temperature. This temperature reading is used to determine whether cooling or heating is needed indoors, and to assess the energy required to maintain a stable indoor temperature in pet mode. Furthermore, pet mode is merely an example, referring to modes that require intelligent temperature monitoring and air circulation via a fresh air system.

[0052] Step S202: Determine the operating mode of the air conditioning heat recovery system based at least on the water temperature of the water heater and the indoor ambient temperature. The operating mode includes a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and does not heat the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant of the air conditioner is used to heat the water heater.

[0053] The schematic diagrams for the first, second, and third operating modes are as follows: Figure 4 , Figure 5 , Figure 6 As shown. The first operating mode is when the user only needs indoor cooling, in which case the system is equivalent to an air conditioner; the second operating mode is when the user needs both cooling and hot water (full heat recovery mode), in which case the water temperature is in the optimal heating range for heat recovery, and all indoor condensation heat is recovered to produce hot water, resulting in the highest system heat recovery efficiency; the third operating mode is when the user needs both cooling and hot water (partial heat recovery mode), in which case the water temperature is higher, and the system efficiency is lower when using full heat recovery mode, so some indoor condensation heat is recovered to produce hot water, the outdoor unit operates in energy-saving mode to assist in heat dissipation, and the indoor cooling effect is improved, resulting in a moderate system heat recovery efficiency.

[0054] Specifically, such as Figure 4 As shown, in the first operating mode, the first solenoid valve 31 and the third solenoid valve 33 are open, the second solenoid valve 32 is closed, the second electronic expansion valve 22 regulates the flow rate, the outdoor unit of the air conditioner operates freely, and the room temperature is intelligently controlled. Figure 5 As shown, in the second operating mode, the second solenoid valve 32 is open, the first solenoid valve 31 and the third solenoid valve 33 are closed, the first electronic expansion valve 21 and the second electronic expansion valve 22 regulate the flow rate, the outdoor unit of the air conditioner stops, and all refrigerant flows through the water heater for heating, recovering all condensation heat to prepare hot water. At this time, the heat recovery system operates at its highest efficiency. Figure 6 As shown, in the third operating mode, the system operates with high efficiency and requires auxiliary heat dissipation from the outdoor unit. The first solenoid valve 31, the second solenoid valve 32 and the third solenoid valve 33 are opened, and the first electronic expansion valve 21 and the second electronic expansion valve 22 regulate the flow. At this time, the outdoor unit of the air conditioner operates in energy-saving mode, and most of the condensation heat is used to heat the hot water.

[0055] Step S203: Control the above-mentioned air conditioning heat recovery system to operate in the above-mentioned operating mode.

[0056] Specifically, after receiving real-time data on the water temperature from the water heater and the indoor ambient temperature, the controller determines the most suitable operating mode based on preset logic and algorithms. As mentioned earlier, the first operating mode focuses solely on cooling, the second mode achieves complete heat recovery, and the third mode performs partial heat recovery. Once the operating mode is determined, the controller sends corresponding control signals to various components in the system. For example, it adjusts the opening of the electronic expansion valve, controls the on / off state of the solenoid valve, and sets the operating parameters of the compressor and other components to ensure that the system can operate efficiently according to the selected mode. If environmental conditions change, such as the water temperature from the water heater rising to a level unsuitable for heat recovery, or the indoor temperature dropping below a pet-friendly temperature, the controller will reassess and, if necessary, readjust the operating mode to adapt to the new environmental conditions and needs.

[0057] The control method for the aforementioned air conditioning heat recovery system of this application first obtains the current water temperature of the water heater and the indoor ambient temperature. Then, based at least on the water temperature and the indoor ambient temperature, it determines the operating mode of the air conditioning heat recovery system. The operating modes include a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and not heating the water heater; the second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant is used to heat the water heater; and the third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant is used to heat the water heater. Finally, the air conditioning heat recovery system is controlled to operate in the specified operating mode. This method, through switching between multiple operating modes, can meet the user's need for indoor temperature regulation while away from home, intelligently control the indoor temperature, and simultaneously recover condensation heat to store domestic hot water in advance. This achieves effective utilization of the entire house's heat energy, improves energy efficiency, reduces the impact of the air conditioning system on the surrounding environment, and solves the problem in existing technologies where air conditioners generate a large amount of waste heat during prolonged operation, causing not only huge energy waste but also thermal pollution to the environment.

[0058] In the above embodiments, after the air conditioning heat recovery system enters pet mode (for example), by switching the system's operating mode, it can provide a constant and comfortable environment for pets while users are away from home during the summer. It also recovers condensate heat to pre-store domestic hot water, achieving effective utilization of the entire house's heat energy, improving energy efficiency, and reducing the air conditioning system's impact on the surrounding environment. Regularly activating fresh air ensures indoor air circulation, reduces pet odor, and improves the air quality of the living environment. Through switching between multiple system operating modes, it meets indoor cooling and hot water needs, enabling temperature regulation while users are away from home, and recovering condensate heat for domestic hot water production, achieving effective utilization of the entire house's heat energy, improving energy efficiency, and reducing the air conditioning system's impact on the surrounding environment.

[0059] In some embodiments, the indoor ambient temperature is greater than or equal to a preset ambient temperature. The operating mode of the air conditioning heat recovery system is determined based on at least the water temperature of the water heater and the indoor ambient temperature, including the following steps:

[0060] Step S2021: When the water temperature of the water heater is greater than or equal to the first preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the first operating mode; wherein, the first preset water temperature is generally set to 55℃.

[0061] If the water temperature in the water heater is greater than or equal to the first preset water temperature, it is determined that the current water temperature in the water heater is too high and there is no expected temperature rise margin. The air conditioning heat recovery mode system has low operating efficiency and is not suitable for operation. At this time, the system enters the first operating mode of air conditioning cooling operation, controls the opening of the first and third solenoid valves, the closing of the second solenoid valve, the adjustment of the flow rate by the second electronic expansion valve, the free operation of the air conditioning outdoor unit, intelligent control of room temperature, and intermittent opening of fresh air in a 240-minute cycle to ensure indoor air circulation, reduce pet odor, and improve the air quality of the living environment.

[0062] The first preset water temperature indicates that the hot water storage has reached a satisfactory or excessive level, eliminating the need to recover heat from the air conditioner's condensation heat. At this point, the air conditioning system only needs to focus on indoor cooling to ensure the pet's comfort in hot weather. This avoids wasting energy on unnecessary heat recovery when hot water is plentiful, ensuring optimal air conditioning cooling efficiency and preventing overheating of the water tank, thus extending the system's lifespan.

[0063] Step S2022: When the water temperature of the water heater is lower than the second preset water temperature but greater than or equal to the third preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the second operating mode, where the second preset water temperature is lower than the first preset water temperature and the third preset water temperature is lower than the second preset water temperature; wherein, the second preset water temperature is generally set to 50℃ and the third preset water temperature is generally set to 10℃.

[0064] When the water temperature in the water heater is lower than the second preset water temperature but greater than or equal to the third preset water temperature, it is determined that the current water temperature in the water heater is within the optimal temperature range for heat recovery mode. At this time, the system enters the second operating mode, with full heat recovery operation. The second solenoid valve opens, while the first and third solenoid valves close. The first and second electronic expansion valves work together to regulate the flow rate. The outdoor unit of the air conditioner stops, and all refrigerant flows through the water heater for heating, recovering all condensation heat to prepare hot water. At this time, the heat recovery system operates at its highest efficiency. Fresh air is intermittently turned on every 240 minutes to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment.

[0065] The second and third preset water temperatures define the suitable range for hot water heating. A temperature below the second preset temperature but not below the third preset temperature indicates a more urgent need for hot water, and the system should fully utilize all waste heat generated during the air conditioning cooling process to produce hot water. In this mode, energy efficiency is maximized because all condensation heat is recovered and used to heat the water in the water heater, while the room also receives effective cooling, meeting the user's simultaneous needs for both hot water and cooling. This achieves the dual goals of energy conservation, emission reduction, and user comfort.

[0066] Step S2023: When the water temperature of the water heater is lower than the third preset water temperature, or when the water temperature of the water heater is greater than or equal to the second preset water temperature and lower than the first preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the third operating mode.

[0067] Specifically, if the water temperature in the water heater is lower than the third preset temperature, or if the water temperature is greater than or equal to the second preset temperature but lower than the first preset temperature, it is determined that the current water temperature inside the water heater is not within the optimal temperature range for heat recovery mode. In this case, the system operates more efficiently in partial heat recovery mode, requiring auxiliary heat dissipation from the outdoor unit to ensure the indoor cooling effect during the initial operation of the air conditioner. Additionally, fresh air is intermittently activated at a cycle of 1 minute to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment.

[0068] When temperatures are low, the system needs to recover some heat to gradually raise the water temperature while maintaining sufficient air conditioning cooling capacity to ensure pet comfort. Within the temperature range between the second and first preset water temperatures, although hot water is needed, the water temperature is close to the upper limit, and full heat recovery would cause the tank to overheat, reducing efficiency. By partially recovering condensation heat, the system can gradually produce hot water without sacrificing too much cooling capacity, avoiding excessive increases in tank temperature while ensuring the indoor temperature remains within a suitable range for pets, thus balancing the needs of hot water production and pet comfort.

[0069] Specifically, the air conditioning heat recovery system monitors the water temperature of the water heater and automatically switches operating modes according to a preset temperature range. This not only provides a comfortable environment for pets but also intelligently adjusts the heat recovery efficiency based on the urgency of hot water demand, achieving efficient energy utilization while also considering the overall stability and lifespan of the system. This intelligent control strategy is key to improving the energy efficiency of air conditioning systems and enhancing the user experience.

[0070] In some embodiments, controlling the air conditioning heat recovery system to operate in the above-described operating mode includes the following steps:

[0071] Step S301: Determine the current operating mode of the above-mentioned air conditioning heat recovery system;

[0072] Step S302: When the air conditioning heat recovery system is operating in the second operating mode or the third operating mode, the indoor ambient temperature is detected in real time.

[0073] Generally, when the air conditioner is running in pet mode, the indoor temperature is relatively high. It is necessary to use the air conditioner to lower the indoor temperature to the preset temperature. Therefore, it is necessary to monitor the indoor temperature in real time so that the air conditioner can be intelligently adjusted according to the indoor temperature.

[0074] Step S303: When the indoor ambient temperature is greater than or equal to the preset ambient temperature, control the air conditioning heat recovery system to operate in the current operating mode.

[0075] The preset ambient temperature is either the pet's comfort temperature or the target temperature set by the user. If the detected indoor ambient temperature is equal to or higher than the preset ambient temperature, it means that the indoor temperature has not dropped to the target temperature set by the user, and the system will continue to operate in the current mode, i.e., the air conditioner will continue to operate in cooling mode.

[0076] Step S304: When the indoor ambient temperature is lower than the preset ambient temperature, determine the updated operation mode of the air conditioning heat recovery system based on the water temperature and time difference of the water heater. The time difference is the time difference between the current time and the target water usage time, and the target water usage time is the preset time for the user to use the water heater.

[0077] When the indoor ambient temperature is lower than the preset ambient temperature, it means that the indoor temperature has dropped to the target temperature set by the user. At this time, the system's operating mode can be adjusted according to the difference between the water temperature and the time.

[0078] Specifically, the air conditioning heat recovery system can intelligently respond to constantly changing environmental conditions and user needs, not only providing an ideal living temperature, but also embodying the intelligent and environmentally friendly design concept of the system through this dynamic control strategy, making it a model of modern smart home technology application.

[0079] In the second operating mode, the interval for detecting indoor ambient temperature can be set, for example, to detect the indoor ambient temperature every b minutes. Similarly, in the third operating mode, the interval for detecting indoor ambient temperature can also be set, for example, to detect the indoor ambient temperature every a minutes. The values ​​of a and b can be the same or different; for example, a value of 20 minutes can be used.

[0080] In some embodiments, the above-mentioned operating mode further includes a fourth operating mode, in which the air conditioner is in standby mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The schematic diagram of the fourth operating mode is shown below. Figure 7 As shown, the fourth operating mode is for users who only need hot water; in this mode, it functions similarly to an air source heat pump water heater. Figure 7 As shown, hot water preparation is more efficient in the fourth operating mode. The second and third solenoid valves are opened, the first solenoid valve is closed, the second electronic expansion valve is closed, and the first electronic expansion valve adjusts the flow rate. At this time, the indoor unit of the air conditioner is in standby mode, and the outdoor unit of the air conditioner runs freely. The efficiency is equivalent to that of an air source water heater, and all the condensation heat is used to heat the water.

[0081] The updated operation mode of the air conditioning heat recovery system is determined based on the water temperature and time difference of the water heater, including the following steps:

[0082] Step S3041: When the water temperature of the water heater is lower than the fourth preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the third operating mode. The fourth preset water temperature is higher than the second preset water temperature and lower than the first preset water temperature. The fourth preset room temperature can be set to 53℃.

[0083] The fourth preset water temperature is a threshold higher than the second preset water temperature but lower than the first preset water temperature, meaning the hot water is not hot enough, but not too hot either. In this case, partial heat recovery mode can continue to be used to increase the water temperature of the water heater, which can save energy.

[0084] Step S3042: When the water temperature of the water heater is greater than or equal to the fourth preset water temperature and the time difference is greater than the preset difference, the operating mode of the air conditioning heat recovery system is determined to be the first operating mode.

[0085] If the water heater reaches the fourth preset temperature, it means that the water temperature is close to the user's preset temperature. At this point, it is necessary to determine whether the user's water usage time is approaching based on the time difference. If the time difference is greater than the preset difference, it means that the current time is still far from the user's water usage time. In this case, the first operating mode can be used to continue operating in the intelligent cooling mode of an air conditioner. In this mode, the system can ensure that the pet's comfort is not affected, while avoiding unnecessary hot water heating, saving energy, reducing pressure on the water tank, and extending the service life of the entire system.

[0086] Step S3043: When the water temperature of the water heater is greater than or equal to the fourth preset water temperature and the time difference is less than or equal to the preset difference, the operating mode of the air conditioning heat recovery system is determined to be the fourth operating mode.

[0087] If the water heater reaches the fourth preset temperature, it means the water is close to the user's preset temperature. At this point, the time difference needs to be used to determine if the user's water usage time is approaching. If the time difference is less than or equal to the preset difference, it means the user's water usage time is imminent, and the water needs to be heated as quickly as possible. In this emergency, the system puts the air conditioner into standby mode, converting all waste heat for hot water heating to ensure hot water is prepared within the required time. This mode can rapidly raise the water temperature to meet the user's immediate hot water needs, while also utilizing the potential energy of the air conditioner in standby mode, achieving efficient resource utilization.

[0088] Therefore, by introducing a fourth operating mode and a dynamic update mechanism based on the difference between water heater temperature and time, the air conditioning heat recovery system becomes more flexible and efficient. It can intelligently adjust its operating mode according to the actual water temperature and the upcoming hot water demand time, not only providing a stable and comfortable environment for pets but also ensuring that users can obtain sufficient and appropriately heated hot water promptly when needed.

[0089] Air conditioning heat recovery systems not only focus on temperature regulation and hot water production, but also need to maintain good indoor air quality. Pets' indoor activities can generate odors and pollutants, and timely introduction of fresh air can improve the indoor environment. Therefore, the system needs to determine a suitable fresh air exchange cycle, that is, automatically turning on the fresh air system at regular intervals to exchange indoor and outdoor air. Therefore, controlling the above-mentioned air conditioning heat recovery system to operate in the above-mentioned operating mode includes the following steps:

[0090] Step S401: Determine the fresh air exchange cycle;

[0091] Specifically, the system automatically calculates the most reasonable fresh air exchange cycle based on a series of factors, such as indoor air quality, pet activity, and outdoor air conditions. This cycle should not be too frequent, which would waste energy, nor too infrequent, which would lead to a decline in indoor air quality. Generally, the cycle is set to 240 minutes.

[0092] Step S402: Control the compressor to exchange indoor air and outdoor air of the air conditioner according to the fresh air exchange cycle.

[0093] The system controls the compressor to operate according to a calculated fresh air exchange cycle. During this cycle, the compressor not only maintains the indoor temperature but also drives air circulation to exchange indoor and outdoor air. It's worth noting that although the description specifies controlling the compressor for air exchange, in reality, fresh air exchange is primarily achieved through the fan and fresh air duct system. The compressor's role is to maintain the overall operation of the air conditioning system and create conditions for fresh air exchange.

[0094] The above steps regularly introduce fresh air, effectively reducing indoor odor concentration, removing pollutants generated by pet activities, maintaining fresh indoor air, and improving pet comfort. Properly scheduling the fresh air exchange cycle can avoid unnecessary energy consumption. For example, ventilating when outdoor air quality is good and the temperature is moderate can reduce the need for the air conditioning system to work extra to regulate indoor temperature. The pet mode of the air conditioning heat recovery system aims to create a pet-friendly living environment, and fresh air exchange is an indispensable part of this. Through scientific management of fresh air exchange, the indoor living experience can be significantly improved without affecting the overall system efficiency, allowing pet owners to know with peace of mind that their pets are in a healthy and comfortable environment when they leave home.

[0095] In some embodiments, the air conditioning heat recovery system further includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is installed on the pipe on the outlet side of the water tank, and the second electronic expansion valve is installed on the branch pipe connecting the water tank and the evaporator in the indoor unit of the air conditioner. Controlling the air conditioning heat recovery system to operate in the above-mentioned operating mode includes the following steps:

[0096] Step S501: When the above operating mode is the third operating mode, obtain the difference between the first preset water temperature and the water temperature of the water heater, as well as the difference between the indoor ambient temperature and the preset ambient temperature, to obtain the target water temperature difference and the target ambient temperature difference.

[0097] Step S502: Adjust the opening of the first electronic expansion valve and the second electronic expansion valve according to the target water temperature difference and the target ambient temperature difference.

[0098] Specifically, in the third operating mode, the system needs to heat the water in the water heater using the waste heat of the air conditioner while ensuring the comfort of the pets indoors. However, it does not recover all the condensation heat, but adjusts the proportion of recovered heat according to actual needs.

[0099] In the third operating mode, the system acquires the difference between the first preset water temperature and the current water temperature of the water heater (target water temperature difference), and the difference between the indoor ambient temperature and the preset ambient temperature (target ambient temperature difference). These two differences represent the degree of deviation between the water heater temperature and the indoor temperature from the ideal state. Based on the target water temperature difference and the target ambient temperature difference, the system dynamically adjusts the opening of the first and second electronic expansion valves. Specifically, if the water heater temperature is lower than the target temperature, the system increases the opening of the first electronic expansion valve to accelerate the heating process of the water tank; conversely, when the water temperature approaches the target, the opening of the first electronic expansion valve decreases. Furthermore, the system dynamically adjusts the opening of the second electronic expansion valve based on parameters such as the indoor ambient temperature, compressor frequency, and indoor and outdoor unit temperatures to improve the air conditioner's cooling efficiency and cooling effect, ensure system operational reliability, and achieve the indoor temperature control target more quickly.

[0100] In this way, the system can achieve precise temperature control in the third operating mode, ensuring the comfort of pets in the indoor environment, while efficiently utilizing the waste heat from the air conditioner to gradually raise the water temperature of the water heater to meet hot water demand. This dynamic adjustment mechanism avoids overheating or overcooling, reduces energy waste, and improves the overall energy efficiency and environmental friendliness of the system. Furthermore, through the precise control of the electronic expansion valve, the system operates more smoothly, reducing pressure fluctuations inside the water tank and air conditioner, extending the lifespan of the equipment, and also reducing noise, providing a quieter and more comfortable living environment.

[0101] In some embodiments, adjusting the opening degree of the first electronic expansion valve and the second electronic expansion valve based on the target water temperature difference and the target ambient temperature difference includes the following steps:

[0102] Step S5021: Obtain a first mapping relationship and a second mapping relationship. The first mapping relationship is the mapping relationship between the water temperature difference and the opening degree of the first electronic expansion valve, and the second mapping relationship is the mapping relationship between the ambient temperature difference and the opening degree of the second electronic expansion valve.

[0103] The first mapping relationship refers to the mathematical relationship between the water temperature in the tank and the opening of the first electronic expansion valve. When the system requires more condensing heat to heat the water in the water heater (i.e., a large target water temperature difference indicates a significant need for a rise in water temperature), the opening of the first electronic expansion valve will increase, allowing more condensing heat to pass through this branch and heat the water in the tank. The second mapping relationship refers to the mathematical relationship between the indoor ambient temperature and the opening of the second electronic expansion valve. The relationship between the indoor ambient temperature and the opening of the second electronic expansion valve is not a simple linear one. In addition to the indoor ambient temperature being one influencing factor, the second electronic expansion valve will also dynamically adjust according to parameters such as compressor frequency and indoor / outdoor unit temperatures to improve the air conditioning's cooling efficiency, ensure system reliability, and achieve the target indoor temperature control more quickly.

[0104] Step S5022: Determine the opening degree of the first electronic expansion valve based on the target water temperature difference and the first mapping relationship, wherein the target water temperature difference is positively correlated with the opening degree of the first electronic expansion valve.

[0105] Step S5023: Determine the opening degree of the second electronic expansion valve based on the target ambient temperature difference and the second mapping relationship, wherein the target ambient temperature difference is positively correlated with the opening degree of the second electronic expansion valve.

[0106] Specifically, thanks to the precise control of the electronic expansion valve, the system can accurately adjust the water temperature of the water heater and the indoor ambient temperature, ensuring that pets can live comfortably at the most suitable temperature. At the same time, the water temperature in the tank can remain stable close to the user's desired value without overheating or cooling. This intelligent control mechanism minimizes energy waste. It dynamically adjusts the amount of condensing heat recovery and the cooling or heating power of the air conditioner according to actual needs, avoiding unnecessary overwork, thereby reducing power consumption and improving the overall energy efficiency of the system.

[0107] Additionally, it should be noted that the dynamic adjustment of the first and second electronic expansion valves generally only exists in the third operating mode. This is because the third operating mode is a partial heat recovery mode, requiring dynamic adjustment of the condensing heat distribution based on the air conditioner's cooling and the water heater's heating. In the first operating mode, only the second electronic expansion valve regulates the flow rate required for air conditioning cooling. In the second operating mode, the first electronic expansion valve is fully open, and the second electronic expansion valve dynamically adjusts. In the fourth operating mode, only the first electronic expansion valve regulates the flow rate required for water heater heating.

[0108] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the control method of the air conditioning heat recovery system of this application will be described in detail below with reference to specific embodiments.

[0109] This embodiment relates to a control method for a specific air - conditioner heat recovery system, as Figure 8 shown, including:

[0110] After the air - conditioner starts cooling, detect the current water temperature Tw of the water heater and compare it with the first preset water temperature h1. According to the comparison result, match the operation mode as the basis for entering the next process:

[0111] If Tw > h1, it is judged that the water temperature in the water heater is too high at present, there is no expected temperature rise margin, and the operation efficiency of the air - conditioner heat recovery mode system is relatively low and not suitable for operation. At this time, the system enters the first operation mode, the air - conditioner cools and operates, control the first solenoid valve and the third solenoid valve to open, the second solenoid valve to close, the second electronic expansion valve adjusts the flow rate, the outdoor unit of the air - conditioner operates freely, intelligently regulates the room temperature, and intermittently opens the fresh air with a period of c min to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment; if Tw < h1, it is judged that the water temperature in the water heater is appropriate at present, and the air - conditioner heat recovery mode can be used. At the same time, compare the water temperature of the water heater with the optimal temperature range h3, h2 of heat recovery (i.e., the second preset water temperature and the third preset water temperature), and select different heat - recovery operation modes according to the comparison result as the basis for entering the next process:

[0112] If h3 ≤ Tw < h2, it is judged that the water temperature in the water heater is in the optimal temperature range of the heat - recovery mode. At this time, the system enters the second operation mode, all heat - recovery operations are carried out, the second solenoid valve is opened, the first solenoid valve and the third solenoid valve are closed, the first electronic expansion valve and the second electronic expansion valve adjust the flow rate, the outdoor unit of the air - conditioner stops running, all refrigerant flows through the water heater for heating, and all condensation heat is recovered to prepare hot water. At this time, the operation efficiency of the heat - recovery system is the highest, and the fresh air is intermittently opened with a period of c min to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment; after the system runs for b min, detect whether the current indoor temperature meets the pet - comfortable temperature range set by the system, and use the comparison result as the basis for entering the next process, where b can be set to 1 min, 5 min, 10 min, etc.

[0113] When h3 ≤ Tw < h2 is not satisfied, it is judged that the water temperature in the water heater is not in the optimal temperature range of the heat - recovery mode. At this time, entering the partial heat - recovery mode, the operation efficiency of the system is relatively high, and the outdoor unit needs to assist in heat dissipation to ensure the initial indoor cooling effect of the air - conditioner. And the fresh air is intermittently opened with a period of c min to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment; after the system runs for a min, detect whether the current indoor temperature meets the pet - comfortable temperature range set by the system, and use the comparison result as the basis for entering the next process, where a can be set to 1 min, 5 min, 10 min, etc.

[0114] If the current indoor temperature does not reach the system's set comfortable temperature range for pets, the system will enter the third operating mode, which involves partial heat recovery.

[0115] If the current indoor temperature has reached the system's set comfortable temperature range for pets, the system will stop at this temperature point and execute the pet mode's intelligent indoor temperature control. It will then compare the current water heater temperature with the fourth preset water temperature (h4, the highest water temperature stored in heat recovery mode), using the comparison result as the basis for proceeding to the next step.

[0116] If Tw < h4, the system continues to enter the third operating mode of partial heat recovery operation.

[0117] If Tw ≥ h4, then entering the fourth operating mode will be more efficient in preparing hot water. The system detects the time difference between the current moment and the user's peak daily hot water usage time and compares it with M. The comparison result serves as the basis for proceeding to the next process.

[0118] If the current time is greater than M from the time when users use hot water daily, the system enters the first operating mode of air conditioning cooling, controls the opening of the first and third solenoid valves, closes the second solenoid valve, and regulates the flow rate with the second electronic expansion valve. The outdoor unit of the air conditioner operates freely, intelligently controls the room temperature, and intermittently turns on fresh air at a cycle of c min to ensure indoor air circulation, reduce pet odors, and improve the air quality of the living environment.

[0119] If the time difference between the current moment and the user's daily peak hot water usage time is ≤M, the system enters the fourth operating mode. This mode opens the second and third solenoid valves, closes the first solenoid valve and the second electronic expansion valve, and regulates the flow rate. At this time, the indoor unit of the air conditioner is in standby mode, while the outdoor unit operates freely. The system's efficiency is equivalent to that of an air-source heat pump water heater, with all condensation heat used to heat the water. When the water temperature Tw reaches the user-set water temperature T1, the system enters the first operating mode, which operates as a cooling unit. The user-set water temperature T1 can be 55℃.

[0120] This application also provides a controller. It should be noted that the controller in this application can be used to execute the control method for an air conditioning heat recovery system provided in this application. This controller is used to implement the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0121] The controller provided in the embodiments of this application will be described below.

[0122] The air conditioning heat recovery system includes an air conditioner and a water heater. The water heater includes a water tank. The inlet of the water tank is connected to the compressor and the exhaust port of the four-way valve of the air conditioner via pipes. The outlet of the water tank is connected to the evaporator in the indoor unit and the condenser in the outdoor unit of the air conditioner via pipes. Figure 9 This is a schematic diagram of a controller according to an embodiment of this application. Figure 9 As shown, the controller includes an acquisition unit 10, a determination unit 20, and a control unit 30. The acquisition unit 10 is used to acquire the water temperature of the water heater and the indoor ambient temperature at the current moment. The determination unit 20 is used to determine the operating mode of the air conditioning heat recovery system based at least on the water temperature of the water heater and the indoor ambient temperature. The operating mode includes a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and does not heat the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant of the air conditioner is used to heat the water heater. The control unit 30 is used to control the air conditioning heat recovery system to operate in the above operating modes.

[0123] The controller of this application includes an acquisition unit, a determination unit, and a control unit. The acquisition unit acquires the water temperature of the water heater and the indoor ambient temperature at the current moment. The determination unit determines the operating mode of the air conditioning heat recovery system based on at least the water temperature of the water heater and the indoor ambient temperature. The operating modes include a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and not heating the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant is used to heat the water heater. The control unit controls the air conditioning heat recovery system to operate in the specified operating mode. This controller, through switching between multiple operating modes, can achieve temperature regulation of the indoor environment while meeting the user's needs during absence. It intelligently controls the indoor temperature while recovering condensation heat to store domestic hot water in advance, achieving effective utilization of the entire house's heat energy, improving energy efficiency, reducing the impact of the air conditioning system on the surrounding environment, and solving the problem in existing technologies where air conditioners generate a large amount of waste heat during prolonged operation, causing not only huge energy waste but also thermal pollution to the environment.

[0124] In some embodiments, the indoor ambient temperature is greater than or equal to a preset ambient temperature. The determining unit includes a first determining module, a second determining module, and a third determining module. The first determining module is used to determine the operating mode of the air conditioning heat recovery system as the first operating mode when the water temperature of the water heater is greater than or equal to a first preset water temperature. The second determining module is used to determine the operating mode of the air conditioning heat recovery system as the second operating mode when the water temperature of the water heater is less than a second preset water temperature but greater than or equal to a third preset water temperature, wherein the second preset water temperature is less than the first preset water temperature and the third preset water temperature is less than the second preset water temperature. The third determining module is used to determine the operating mode of the air conditioning heat recovery system as the third operating mode when the water temperature of the water heater is less than the third preset water temperature, or when the water temperature of the water heater is greater than or equal to the second preset water temperature but less than the first preset water temperature. By partially recovering condensation heat, the system can gradually produce hot water without sacrificing too much cooling capacity, avoiding excessive rise in the water tank temperature.

[0125] In some embodiments, the control unit includes a fourth determining module, a first detecting module, a first controlling module, and a fifth determining module. The fourth determining module is used to determine the current operating mode of the air conditioning heat recovery system. The first detecting module is used to detect the indoor ambient temperature in real time when the air conditioning heat recovery system is operating in the second or third operating mode. The first controlling module is used to control the air conditioning heat recovery system to operate in the current operating mode when the indoor ambient temperature is greater than or equal to a preset ambient temperature. The fifth determining module is used to determine an updated operating mode of the air conditioning heat recovery system based on the difference between the water temperature of the water heater and the time difference when the indoor ambient temperature is less than the preset ambient temperature. The time difference is the difference between the current time and the target water usage time, where the target water usage time is a preset time for the user to use the water heater. The air conditioning heat recovery system can intelligently respond to constantly changing environmental conditions and user needs, providing not only an ideal living temperature but also effectively utilizing the waste heat generated by the air conditioner to prepare hot water, reducing reliance on electric auxiliary heating, thereby saving electricity costs and reducing environmental impact.

[0126] In some embodiments, the above-mentioned operating mode further includes a fourth operating mode, in which the air conditioner is in standby mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The fifth determining module includes a first determining submodule, a second determining submodule, and a third determining submodule. The first determining submodule is used to determine the operating mode of the air conditioning heat recovery system as the third operating mode when the water temperature of the water heater is lower than a fourth preset water temperature, wherein the fourth preset water temperature is higher than the second preset water temperature and lower than the first preset water temperature. The second determining submodule is used to determine the operating mode of the air conditioning heat recovery system as the first operating mode when the water temperature of the water heater is greater than or equal to the fourth preset water temperature and the time difference is greater than a preset difference. The third determining submodule is used to determine the operating mode of the air conditioning heat recovery system as the fourth operating mode when the water temperature of the water heater is greater than or equal to the fourth preset water temperature and the time difference is less than or equal to the preset difference. By introducing a fourth operating mode and a dynamic update mechanism based on the water heater temperature and time difference, the air conditioning heat recovery system becomes more flexible and efficient.

[0127] In some embodiments, the control unit includes a sixth determining module and a second control module. The sixth determining module is used to determine the fresh air exchange cycle; the second control module is used to control the compressor to exchange indoor air and outdoor air of the air conditioner according to the fresh air exchange cycle. This allows for the periodic introduction of fresh air, effectively reducing indoor odor concentration, removing pollutants generated by pet activities, maintaining fresh indoor air, and improving the comfort of pets.

[0128] In some embodiments, the air conditioning heat recovery system further includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is installed on the pipe on the outlet side of the water tank, and the second electronic expansion valve is installed on the branch pipe connecting the water tank and the evaporator in the indoor unit of the air conditioner. The control unit includes a first acquisition module and a first adjustment module. The first acquisition module is used to acquire the difference between a first preset water temperature and the water temperature of the water heater, as well as the difference between the indoor ambient temperature and the preset ambient temperature, when the operating mode is the third operating mode, to obtain the target water temperature difference and the target ambient temperature difference. The first adjustment module is used to adjust the opening degree of the first electronic expansion valve and the second electronic expansion valve according to the target water temperature difference and the target ambient temperature difference. In this way, the system can achieve precise temperature control in the third operating mode, ensuring the comfort of pets in the indoor environment, while efficiently utilizing the waste heat of the air conditioner to gradually increase the water temperature of the water heater to meet the hot water demand.

[0129] In some embodiments, the first adjustment module includes a second acquisition module, a seventh determination module, and an eighth determination module. The second acquisition module is used to acquire a first mapping relationship and a second mapping relationship. The first mapping relationship is a mapping relationship between the water temperature difference and the opening degree of the first electronic expansion valve, and the second mapping relationship is a mapping relationship between the ambient temperature difference and the opening degree of the second electronic expansion valve. The seventh determination module is used to determine the opening degree of the first electronic expansion valve based on the target water temperature difference and the first mapping relationship, wherein the target water temperature difference is positively correlated with the opening degree of the first electronic expansion valve. The eighth determination module is used to determine the opening degree of the second electronic expansion valve based on the target ambient temperature difference and the second mapping relationship, wherein the target ambient temperature difference is positively correlated with the opening degree of the second electronic expansion valve. With the precise control of the electronic expansion valve, the system can very accurately adjust the water temperature of the water heater and the indoor ambient temperature, ensuring that pets can live comfortably at the most suitable temperature, while the water temperature in the tank can also stably approach the user's expected value without overheating or cooling.

[0130] The control device of the aforementioned air conditioning heat recovery system includes a processor and a memory. The aforementioned acquisition units, etc., are all stored as program units in the memory, and the processor executes these program units stored in the memory to achieve the corresponding functions. All of the aforementioned modules are located in the same processor; alternatively, the aforementioned modules may be located in different processors in any combination.

[0131] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and adjusting kernel parameters can address the problem of excessive waste heat generated by air conditioners running for extended periods, which not only wastes energy but also causes thermal pollution.

[0132] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0133] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the control method of the air conditioning heat recovery system.

[0134] This invention provides a processor for running a program, wherein the program executes the control method of the air conditioning heat recovery system.

[0135] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0136] Step S201: Obtain the water temperature of the water heater and the indoor ambient temperature at the current moment;

[0137] Step S202: Determine the operating mode of the air conditioning heat recovery system based at least on the water temperature of the water heater and the indoor ambient temperature. The operating mode includes a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and does not heat the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant of the air conditioner is used to heat the water heater.

[0138] Step S203: Control the above-mentioned air conditioning heat recovery system to operate in the above-mentioned operating mode.

[0139] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0140] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0141] Step S201: Obtain the water temperature of the water heater and the indoor ambient temperature at the current moment;

[0142] Step S202: Determine the operating mode of the air conditioning heat recovery system based at least on the water temperature of the water heater and the indoor ambient temperature. The operating mode includes a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and does not heat the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant of the air conditioner is used to heat the water heater.

[0143] Step S203: Control the above-mentioned air conditioning heat recovery system to operate in the above-mentioned operating mode.

[0144] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0145] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0146] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0147] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0148] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0149] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0150] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0151] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0152] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0153] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0154] 1) The control method of the air conditioning heat recovery system described in this application first obtains the current water temperature of the water heater and the indoor ambient temperature; then, based at least on the water temperature of the water heater and the indoor ambient temperature, it determines the operating mode of the air conditioning heat recovery system. The operating modes include a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and not heating the water heater; the second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant is used to heat the water heater; and the third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant is used to heat the water heater. Finally, the air conditioning heat recovery system is controlled to operate in the specified operating mode. This method, through switching between multiple operating modes, can meet the user's need for indoor temperature regulation while away from home, intelligently control the indoor temperature, and simultaneously recover condensation heat to store domestic hot water in advance. This achieves effective utilization of the entire house's heat energy, improves energy efficiency, reduces the impact of the air conditioning system on the surrounding environment, and solves the problem in existing technologies where air conditioners generate a large amount of waste heat during prolonged operation, causing not only huge energy waste but also thermal pollution to the environment.

[0155] 2) The controller of this application includes an acquisition unit, a determination unit, and a control unit. The acquisition unit acquires the water temperature of the water heater and the indoor ambient temperature at the current moment. The determination unit determines the operating mode of the air conditioning heat recovery system based at least on the water temperature of the water heater and the indoor ambient temperature. The operating modes include a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and not heating the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant is used to heat the water heater. The control unit controls the air conditioning heat recovery system to operate in the operating mode. By switching between multiple operating modes, this controller can meet the user's need for indoor temperature regulation while away from home, intelligently control the indoor temperature, and recover condensation heat to store domestic hot water in advance. This achieves effective utilization of the heat energy of the entire house, improves energy efficiency, reduces the impact of the air conditioning system on the surrounding environment, and solves the problem in the prior art where air conditioners generate a large amount of waste heat when running for a long time, causing not only huge energy waste but also thermal pollution to the environment.

[0156] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A control method for an air conditioning heat recovery system, characterized in that, An air conditioning heat recovery system includes an air conditioner and a water heater. The water heater includes a water tank. The inlet of the water tank is connected to the exhaust port of the air conditioner's compressor and the inlet of a four-way valve via pipes. The outlet of the water tank is connected to the evaporator in the indoor unit of the air conditioner and the condenser in the outdoor unit of the air conditioner via pipes. The method includes: Get the current water temperature from the water heater and the ambient temperature at the current moment; The operating mode of the air conditioning heat recovery system is determined based at least on the water temperature of the water heater and the indoor ambient temperature. The operating mode includes a first operating mode, a second operating mode, and a third operating mode. The first operating mode is when the air conditioner is in cooling mode and does not heat the water heater. The second operating mode is when the air conditioner is in cooling mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The third operating mode is when the air conditioner is in cooling mode and part of the heat released by the refrigerant of the air conditioner is used to heat the water heater. Control the air conditioning heat recovery system to operate in the aforementioned operating mode; Controlling the air conditioning heat recovery system to operate in the aforementioned operating mode includes: Determine the current operating mode of the air conditioning heat recovery system; When the air conditioning heat recovery system is operating in the second operating mode or the third operating mode, the indoor ambient temperature is monitored in real time. When the indoor ambient temperature is greater than or equal to the preset ambient temperature, the air conditioning heat recovery system is controlled to operate in the current operating mode; When the indoor ambient temperature is lower than the preset ambient temperature, the updated operation mode of the air conditioning heat recovery system is determined based on the difference between the water temperature of the water heater and the time difference. The time difference is the difference between the current time and the target water usage time, and the target water usage time is the preset time for the user to use the water heater.

2. The method according to claim 1, characterized in that, The indoor ambient temperature is greater than or equal to a preset ambient temperature. The operating mode of the air conditioning heat recovery system is determined based on at least the water temperature of the water heater and the indoor ambient temperature, including: When the water temperature of the water heater is greater than or equal to the first preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the first operating mode; When the water temperature of the water heater is less than the second preset water temperature but greater than or equal to the third preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the second operating mode, where the second preset water temperature is less than the first preset water temperature and the third preset water temperature is less than the second preset water temperature. When the water temperature in the water heater is less than the third preset water temperature, or when the water temperature in the water heater is greater than or equal to the second preset water temperature and less than the first preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the third operating mode.

3. The method according to claim 2, characterized in that, The operating mode also includes a fourth operating mode, which is a mode in which the air conditioner is in standby mode and all the heat released by the refrigerant of the air conditioner is used to heat the water heater. The updated operating mode of the air conditioning heat recovery system is determined based on the difference between the water temperature and the time in the water heater, including: When the water temperature of the water heater is lower than the fourth preset water temperature, the operating mode of the air conditioning heat recovery system is determined to be the third operating mode, wherein the fourth preset water temperature is higher than the second preset water temperature and lower than the first preset water temperature. When the water temperature of the water heater is greater than or equal to the fourth preset water temperature and the time difference is greater than the preset difference, the operating mode of the air conditioning heat recovery system is determined to be the first operating mode. When the water temperature of the water heater is greater than or equal to the fourth preset water temperature and the time difference is less than or equal to the preset difference, the operating mode of the air conditioning heat recovery system is determined to be the fourth operating mode.

4. The method according to claim 1, characterized in that, Controlling the air conditioning heat recovery system to operate in the aforementioned operating mode includes: Determine the fresh air exchange cycle; The compressor is controlled to exchange indoor air and outdoor air of the air conditioner according to the fresh air exchange cycle.

5. The method according to claim 1, characterized in that, The air conditioning heat recovery system also includes a first electronic expansion valve and a second electronic expansion valve. The first electronic expansion valve is installed on the pipe on the outlet side of the water tank, and the second electronic expansion valve is installed on the branch pipe connecting the water tank and the evaporator in the indoor unit of the air conditioner. Controlling the air conditioning heat recovery system to operate in the aforementioned operating mode includes: When the operating mode is the third operating mode, the difference between the first preset water temperature and the water temperature of the water heater, as well as the difference between the indoor ambient temperature and the preset ambient temperature, are obtained to obtain the target water temperature difference and the target ambient temperature difference. Based on the target water temperature difference and the target ambient temperature difference, adjust the opening of the first electronic expansion valve and the opening of the second electronic expansion valve.

6. The method according to claim 5, characterized in that, Adjusting the opening of the first electronic expansion valve and the second electronic expansion valve based on the target water temperature difference and the target ambient temperature difference includes: Obtain a first mapping relationship and a second mapping relationship. The first mapping relationship is the mapping relationship between the water temperature difference and the opening degree of the first electronic expansion valve, and the second mapping relationship is the mapping relationship between the ambient temperature difference and the opening degree of the second electronic expansion valve. Based on the target water temperature difference and the first mapping relationship, the opening degree of the first electronic expansion valve is determined, wherein the target water temperature difference is positively correlated with the opening degree of the first electronic expansion valve. The opening degree of the second electronic expansion valve is determined based on the target ambient temperature difference and the second mapping relationship, wherein the target ambient temperature difference is positively correlated with the opening degree of the second electronic expansion valve.

7. An air conditioning heat recovery system, characterized in that, include: The controller is used to execute the control method of the air conditioning heat recovery system according to any one of claims 1 to 6; An air conditioner, comprising an indoor unit, an outdoor unit condenser, a four-way valve, and a compressor; A water heater, comprising a water tank, wherein the inlet of the water tank is connected to the exhaust port of the compressor of the air conditioner and the inlet of the four-way valve via pipes, and the outlet of the water tank is connected to the evaporator in the indoor unit of the air conditioner and the condenser in the outdoor unit of the air conditioner via pipes.

8. The air conditioning heat recovery system according to claim 7, characterized in that, The air conditioning heat recovery system also includes: A first electronic expansion valve is installed on the pipeline on the outlet side of the water tank; The second electronic expansion valve is installed on the branch pipe connecting the water tank and the evaporator in the indoor unit of the air conditioner. The first solenoid valve is installed on the branch pipeline connecting the exhaust port of the compressor and the inlet of the four-way valve. The second solenoid valve is installed on the pipeline on the inlet side of the water tank; The third solenoid valve is installed on the branch pipe connecting the water tank and the outdoor unit condenser of the air conditioner.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the control method of the air conditioning heat recovery system according to any one of claims 1 to 6.

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