Heat recovery air source heat pump system

Abstract

The utility model provides a heat recovery air source heat pump system. The heat recovery air source heat pump system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heater assembly and a first four-way valve, a first connector of the first four-way valve communicates with an exhaust port of the compressor, a second connector of the first four-way valve communicates with an air suction port of the compressor, and a third connector and a fourth connector of the first four-way valve selectively communicate with the outdoor heat exchanger and the indoor heat exchanger; the water heater assembly comprises a hot water pipeline, a first throttling device and a water heater heat exchanger, the first end of the hot water pipeline is connected to a pipeline between the exhaust port and the first connector, the second end of the hot water pipeline is connected to a pipeline between the indoor heat exchanger and the outdoor heat exchanger, and the water heater heat exchanger and the first throttling device are arranged on the hot water pipeline. A second throttling device is arranged at the end, connected with the hot water pipeline, of the indoor heat exchanger. According to the heat recovery air source heat pump system, the requirements of multiple use modes can be met, and the economical efficiency of system operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat pump system technology, and more specifically, to a heat recovery air source heat pump system. Background Technology

[0002] With the rapid development of the social economy and the significant improvement of people's living standards, families' demand for a comfortable life is growing day by day. Among many home appliances, air conditioners and water heaters have become household necessities due to their important role in regulating indoor temperature and providing hot water.

[0003] Existing residential air source water heaters and air conditioning systems are typically designed independently, meaning they need to be installed and operated separately. This design not only increases installation costs for the home but also takes up more space.

[0004] During summer and transitional seasons, air conditioning systems generate significant waste heat during cooling, while water heaters consume energy to heat water. If these two devices could work together, utilizing the waste heat from the air conditioner for water heating, energy efficiency would be greatly improved, reducing energy waste. Independent operation of air conditioners and water heaters not only leads to energy waste but may also negatively impact the environment, increasing emissions of harmful gases during air conditioning operation and contributing to the greenhouse effect.

[0005] Residential users face higher economic costs when purchasing and maintaining two separate systems, including equipment purchase costs, installation costs, and long-term energy consumption costs. Users also need to control the air conditioner and water heater separately, increasing operational complexity, especially when simultaneously regulating indoor temperature and hot water supply.

[0006] There are currently some products that attempt to integrate air conditioners and water heaters, but these products often have limited operating modes and low heat recovery efficiency, which reduces the economic efficiency of system operation. Utility Model Content

[0007] The main purpose of this utility model is to provide a heat recovery air source heat pump system that can meet the needs of various usage modes and improve the economic efficiency of system operation.

[0008] To achieve the above objectives, according to one aspect of the present invention, a heat recovery air source heat pump system is provided, including a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heater assembly, and a first four-way valve. The first port of the first four-way valve is connected to the exhaust port of the compressor, the second port of the first four-way valve is connected to the intake port of the compressor, the third port of the first four-way valve is selectively connected to the outdoor heat exchanger and the indoor heat exchanger, and the fourth port of the first four-way valve is selectively connected to the outdoor heat exchanger and the indoor heat exchanger. The water heater assembly includes a hot water pipe, a first throttling device, and a water heater heat exchanger. The first end of the hot water pipe is connected to the pipe between the exhaust port and the first port, and the second end of the hot water pipe is connected to the pipe between the indoor heat exchanger and the outdoor heat exchanger. The water heater heat exchanger and the first throttling device are disposed on the hot water pipe, and a second throttling device is disposed at the end of the indoor heat exchanger connected to the hot water pipe.

[0009] Furthermore, a first shut-off valve is installed on the connecting pipe between the exhaust port and the first interface, and a second shut-off valve is also installed on the hot water pipe. The second shut-off valve is located at the end of the water heater heat exchanger near the indoor heat exchanger.

[0010] Furthermore, a one-way valve is installed at the outlet end of the first throttling device.

[0011] Furthermore, the heat recovery air source heat pump system also includes a second four-way valve, a three-way valve, a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline. The outdoor heat exchanger is connected to the first port of the second four-way valve. The first end of the first pipeline is connected to the third port of the first four-way valve, and the second end is connected to the third port of the second four-way valve. The first end of the second pipeline is connected to the fourth port of the first four-way valve, and the second end is connected to the third port of the three-way valve. The first end of the third pipeline is connected to the second port of the second four-way valve, and the second end is connected to the second port of the three-way valve. The indoor heat exchanger is connected to the first port of the three-way valve. The first end of the fourth pipeline is connected to the fourth port of the first four-way valve, and the second end is connected to the fourth port of the second four-way valve.

[0012] Furthermore, the heat recovery air source heat pump system also includes a second four-way valve, a third four-way valve, a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline. The outdoor heat exchanger is connected to the first port of the second four-way valve. The first end of the first pipeline is connected to the third port of the first four-way valve, and the second end is connected to the third port of the second four-way valve. The first end of the second pipeline is connected to the fourth port of the first four-way valve, and the second end is connected to the third port of the third four-way valve. The first end of the third pipeline is connected to the second port of the second four-way valve, and the second end is connected to the second port of the third four-way valve. The indoor heat exchanger is connected to the first port of the third four-way valve. The first end of the fourth pipeline is connected to the fourth port of the first four-way valve, and the second end is connected to the fourth port of the second four-way valve.

[0013] Furthermore, a third shut-off valve is installed at the end of the outdoor heat exchanger closest to the hot water pipe.

[0014] Furthermore, the water heater assembly also includes a water tank, with the water heater heat exchanger surrounding the water tank or the water heater heat exchanger being built into the water tank.

[0015] Furthermore, the heat recovery air source heat pump system also includes multiple shut-off valves, a first pipe, a second pipe, a third pipe, and a fourth pipe. The first end of the first pipe is connected to the third interface of the first four-way valve, and the second end is connected to the first end of the third pipe. The first end of the second pipe is connected to the second interface of the first four-way valve, and the second end is connected to the second end of the third pipe. The first end of the fourth pipe is connected to the connection position of the first pipe and the third pipe, and the second end is connected to the second pipe. Shut-off valves are respectively installed on the first pipe, the second pipe, the third pipe, the fourth pipe, the connecting pipe from the outdoor heat exchanger to the third pipe, and the connecting pipe from the indoor heat exchanger to the third pipe.

[0016] Furthermore, the heat recovery air source heat pump system also includes a temperature sensor, which is used to sense the water temperature of the water heater components and the indoor ambient temperature.

[0017] Furthermore, the first and second throttling devices are electronic expansion valves.

[0018] The heat recovery air source heat pump system using the technical solution of this utility model includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a water heater assembly, and a first four-way valve. The first port of the first four-way valve is connected to the exhaust port of the compressor, the second port of the first four-way valve is connected to the intake port of the compressor, the third port of the first four-way valve is selectively connected to the outdoor heat exchanger and the indoor heat exchanger, and the fourth port of the first four-way valve is selectively connected to the outdoor heat exchanger and the indoor heat exchanger. The water heater assembly includes a hot water pipe, a first throttling device, and a water heater heat exchanger. The first end of the hot water pipe is connected to the pipe between the exhaust port and the first port, and the second end of the hot water pipe is connected to the pipe between the indoor heat exchanger and the outdoor heat exchanger. The water heater heat exchanger and the first throttling device are installed on the hot water pipe, and a second throttling device is installed at the end of the indoor heat exchanger connected to the hot water pipe. This heat recovery air source heat pump system integrates an air source heat pump hot water system and an air conditioning system, sharing an outdoor unit. The third port of the first four-way valve can be selectively connected to both the outdoor and indoor heat exchangers, and the fourth port can also be selectively connected to both. This allows for switching the connection status of the first four-way valve with the outdoor and indoor heat exchangers, enabling flexible adjustment of the refrigerant flow path between the indoor and outdoor heat exchangers and the water heater heat exchanger. By switching the refrigerant flow path, the system combination can be changed to meet various usage modes, achieving multi-purpose functionality and effectively saving equipment materials. When both air conditioning cooling and water heater heating modes are activated simultaneously, the system can effectively transfer natural heat from the indoor environment to the water heater for water heating, achieving efficient recovery and utilization of natural energy and improving the system's operational economy. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0020] Figure 1 A schematic diagram of the structure of a heat recovery air source heat pump system according to an embodiment of the present invention is shown.

[0021] The above figures include the following reference numerals:

[0022] 1. Compressor; 2. Indoor heat exchanger; 3. Outdoor heat exchanger; 4. Water heater assembly; 5. First four-way valve; 6. Hot water pipeline; 7. First throttling device; 8. Second throttling device; 9. Water heater heat exchanger; 10. First shut-off valve; 11. Second shut-off valve; 12. Check valve; 13. Second four-way valve; 14. Third four-way valve; 15. First pipeline; 16. Second pipeline; 17. Third pipeline; 18. Fourth pipeline; 19. Third shut-off valve. Detailed Implementation

[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0024] See Figure 1 As shown, according to an embodiment of the present invention, the heat recovery air source heat pump system includes a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 3, a water heater assembly 4, and a first four-way valve 5. The first port of the first four-way valve 5 is connected to the exhaust port of the compressor 1, the second port of the first four-way valve 5 is connected to the intake port of the compressor 1, the third port of the first four-way valve 5 is selectively connected to the outdoor heat exchanger 3 and the indoor heat exchanger 2, and the fourth port of the first four-way valve 5 is selectively connected to the outdoor heat exchanger 3 and the indoor heat exchanger 2. The water heater assembly 4 includes a hot water pipe 6, a first throttling device 7, and a water heater heat exchanger 9. The first end of the hot water pipe 6 is connected to the pipe between the exhaust port and the first port, and the second end of the hot water pipe 6 is connected to the pipe between the indoor heat exchanger 2 and the outdoor heat exchanger 3. The water heater heat exchanger 9 and the first throttling device 7 are installed on the hot water pipe 6, and a second throttling device 8 is installed at the end of the indoor heat exchanger 2 connected to the hot water pipe 6.

[0025] This heat recovery air source heat pump system integrates an air source heat pump hot water system and an air conditioning system, sharing an outdoor unit. The third port of the first four-way valve 5 can be selectively connected to both the outdoor heat exchanger 3 and the indoor heat exchanger 2, and the fourth port can also be selectively connected to both. This allows for switching the connection status between the first four-way valve 5 and the outdoor and indoor heat exchangers 3 and 2, enabling flexible adjustment of the refrigerant flow path between the indoor and outdoor heat exchangers 2 and the water heater heat exchanger 9. By switching the refrigerant flow path, the system combination can be changed to meet various usage modes, achieving multi-purpose functionality and effectively saving equipment materials. When both air conditioning cooling and water heater heating modes are activated simultaneously, the system can effectively transfer natural heat from the indoor environment to the water heater for water heating, achieving efficient recovery and utilization of natural energy and improving the system's operational economy.

[0026] This design allows the system to effectively utilize indoor heat for hot water heating during air conditioning operation. This not only improves energy efficiency and achieves efficient recovery of natural energy, but also reduces the cost of hot water heating, making it suitable for both residential and commercial applications requiring air conditioning and hot water. In practice, this design significantly reduces energy consumption and carbon emissions, saves users on electricity bills, and improves their quality of life. In commercial settings such as shopping malls and offices, this system meets air conditioning and hot water needs while reducing reliance on the power grid, lowering operating costs, and enhancing the company's economic benefits.

[0027] The system is also suitable for combinations of multiple air conditioning terminals and multiple water heater terminals.

[0028] In one embodiment, a first shut-off valve 10 is installed on the connecting pipe between the exhaust port and the first interface, and a second shut-off valve 11 is also installed on the hot water pipe 6. The second shut-off valve 11 is located at the end of the water heater heat exchanger 9 near the indoor heat exchanger 2. This design allows the system to cut off the connection between the exhaust port and the first four-way valve 5 via the first shut-off valve 10, or to cut off the hot water pipe 6 via the second shut-off valve 11, when heat recovery is not required. This facilitates the adjustment of the heat pump system's operating mode, avoids unnecessary energy loss, and improves the system's flexibility and energy efficiency, making it particularly suitable for scenarios with seasonal hot water use. In practical applications, this design allows the system to automatically adjust its operating mode according to the season. For example, in summer, due to reduced hot water demand, the system automatically closes the shut-off valve on the hot water pipe, concentrating energy for air conditioning cooling. In winter, the system opens the shut-off valve, fully utilizing the waste heat generated by the outdoor heat exchanger 3 and the air conditioner to heat the hot water, providing users with a comfortable hot water supply and greatly improving the overall energy utilization rate. The first shut-off valve 10 and the second shut-off valve 11 are, for example, solenoid valves.

[0029] In one embodiment, a one-way valve 12 is provided at the outlet end of the first throttling device 7. The one-way valve 12 effectively prevents refrigerant backflow from damaging the system, ensuring long-term stable operation. This design is particularly important in places like hotels, where air conditioning and hot water demands vary with seasons and occupancy rates, and frequent mode switching places higher demands on system safety. The addition of the one-way valve allows the system to switch modes more safely, meeting the diverse needs of users at different times.

[0030] In one embodiment, the heat recovery air source heat pump system further includes a second four-way valve 13, a three-way valve, a first pipe 15, a second pipe 16, a third pipe 17, and a fourth pipe 18. The outdoor heat exchanger 3 is connected to the first port of the second four-way valve 13. The first end of the first pipe 15 is connected to the third port of the first four-way valve 5, and the second end is connected to the third port of the second four-way valve 13. The first end of the second pipe 16 is connected to the fourth port of the first four-way valve 5, and the second end is connected to the third port of the three-way valve. The first end of the third pipe 17 is connected to the second port of the second four-way valve 13, and the second end is connected to the second port of the three-way valve. The indoor heat exchanger 2 is connected to the first port of the three-way valve. The first end of the fourth pipe 18 is connected to the fourth port of the first four-way valve 5, and the second end is connected to the fourth port of the second four-way valve 13.

[0031] The combination of four-way and three-way valves allows for convenient adjustment of the connection between the first four-way valve 5 and the indoor heat exchanger 2 and outdoor heat exchanger 3. It also enables multiple adjustment modes, allowing the system to flexibly switch between air conditioning and hot water heating modes, meeting the needs of different seasons and usage scenarios. This makes it particularly suitable for environments requiring high energy efficiency and multi-functionality, such as hotels, schools, and hospitals. In implementation, this complex piping design and multiple four-way valve configuration significantly improves the efficiency of switching between different operating modes, reduces energy loss during switching, and enhances the overall energy utilization efficiency.

[0032] In one embodiment, the heat recovery air source heat pump system further includes a second four-way valve 13, a third four-way valve 14, a first pipe 15, a second pipe 16, a third pipe 17, and a fourth pipe 18. The outdoor heat exchanger 3 is connected to the first port of the second four-way valve 13. The first end of the first pipe 15 is connected to the third port of the first four-way valve 5, and the second end is connected to the third port of the second four-way valve 13. The first end of the second pipe 16 is connected to the fourth port of the first four-way valve 5, and the second end is connected to the third port of the third four-way valve 14. The first end of the third pipe 17 is connected to the second port of the second four-way valve 13, and the second end is connected to the second port of the third four-way valve 14. The indoor heat exchanger 2 is connected to the first port of the third four-way valve 14. The first end of the fourth pipe 18 is connected to the fourth port of the first four-way valve 5, and the second end is connected to the fourth port of the second four-way valve 13.

[0033] By adding a third four-way valve 14, the refrigerant flow direction can be controlled more precisely, enabling effective and rapid switching of the refrigerant flow path. This facilitates multiple adjustment modes, further improving the system's energy efficiency and stability, making it suitable for scenarios with higher energy efficiency requirements. This precise refrigerant flow direction control can effectively handle high-load air conditioning and hot water demands, ensuring stable system operation in complex environments. Through intelligent control strategies, the system can quickly and efficiently switch between different modes, meeting high requirements for energy efficiency and system stability, reducing energy waste, and lowering operating costs.

[0034] In one embodiment, a third shut-off valve 19 is provided at the end of the outdoor heat exchanger 3 near the hot water pipe 6. The third shut-off valve 19 allows the pipe containing the outdoor heat exchanger 3 to be cut off. This means that when the outdoor heat exchanger 3 is not needed, the pipe can be shut off using the third shut-off valve 19, allowing the indoor heat to be completely absorbed by the water heater heat exchanger 9, thus improving the efficiency of indoor heat recovery. The third shut-off valve 19 is, for example, a solenoid valve.

[0035] In one embodiment, the water heater assembly 4 further includes a water tank, with the water heater heat exchanger 9 surrounding or built into the water tank. This design improves the efficiency of hot water heating and reduces heat loss, making it suitable for places requiring a large supply of hot water, such as swimming pools, gyms, and hotels. In places like swimming pools, gyms, and hotels, this water tank design ensures a continuous and stable hot water supply. Simultaneously, the water heater heat exchanger 9 surrounding or built into the water tank reduces heat loss, improves heating efficiency, provides users with a constant-temperature, comfortable hot water experience, and also reduces energy consumption, enhancing the system's economy and environmental friendliness.

[0036] In one embodiment, the heat recovery air source heat pump system further includes multiple shut-off valves, a first pipe 15, a second pipe 16, a third pipe 17, and a fourth pipe 18. The first end of the first pipe 15 is connected to the third interface of the first four-way valve 5, and the second end is connected to the first end of the third pipe 17. The first end of the second pipe 16 is connected to the second interface of the first four-way valve 5, and the second end is connected to the second end of the third pipe 17. The first end of the fourth pipe 18 is connected to the connection position of the first pipe 15 and the third pipe 17, and the second end is connected to the second pipe 16. Shut-off valves are respectively installed on the first pipe 15, the second pipe 16, the third pipe 17, the fourth pipe 18, the connecting pipe from the outdoor heat exchanger 3 to the third pipe 17, and the connecting pipe from the indoor heat exchanger 2 to the third pipe 17.

[0037] By installing shut-off valves at locations where pipeline switching is required, the system can control the opening and closing of the shut-off valves according to actual needs, flexibly adjust the operating mode of the heat pump system, improve the system's energy efficiency and adaptability, reduce energy waste, improve energy utilization efficiency, and lower operating costs. At the same time, it also enhances the system's adaptability and flexibility, meeting diverse needs in different scenarios.

[0038] In one embodiment, the heat recovery air source heat pump system also includes a temperature sensor for sensing the water temperature of the water heater component 4 and the indoor ambient temperature. The addition of the temperature sensor enables the system to automatically adjust its operating mode, ensuring comfortable hot water and indoor temperatures, improving the user experience, and making it suitable for smart homes and commercial buildings requiring automated control.

[0039] In one embodiment, the first throttling device 7 and the second throttling device 8 are electronic expansion valves. The use of electronic expansion valves not only improves system energy efficiency but also enables more precise control of refrigerant flow, making them suitable for applications with high requirements for energy efficiency and precise control, such as data centers and laboratories. In applications like data centers and laboratories where energy efficiency and control precision are critical, the use of electronic expansion valves allows for precise regulation of refrigerant flow, ensuring efficient system operation. Simultaneously, the high-precision control capability of electronic expansion valves enables the system to handle the high heat loads of equipment in data centers and laboratories, guaranteeing the normal operation of equipment and the security of data.

[0040] The operating modes of this heat recovery air source heat pump system include:

[0041] 1. Air Conditioning Cooling + Water Heater Heating Mode (Heat Recovery): When the air conditioner is on for cooling and the water heater is heating simultaneously, the first shut-off valve 10 is closed, the second shut-off valve 11 is open, and the high-temperature, high-pressure exhaust gas flowing from the compressor 1's discharge port enters the water heater heat exchanger 9 for condensation and heat transfer (heating water). The first throttling device 7 is fully open, and the third shut-off valve 19 is closed. The refrigerant is throttled and depressurized through the second throttling device 8, evaporates and absorbs heat at the indoor heat exchanger 2, and then enters the compressor 1 for compression to begin a secondary cycle, realizing the recovery and utilization of indoor heat. When rapid hot water production is required, the second throttling device 8 is fully open, the third shut-off valve 19 is open, the first throttling device 7 throttles and depressurizes, and then one path enters the indoor heat exchanger 2 to absorb heat, lowering the indoor ambient temperature (heat recovery), while the other path enters the outdoor heat exchanger 3 for evaporation and heat absorption, increasing the amount of heat absorbed and improving the speed of hot water production.

[0042] 2. Air Conditioner Heating + Water Heater Heating Mode: When the air conditioner is turned on for heating and the water heater is heating simultaneously, the first shut-off valve 10, the second shut-off valve 11, and the third shut-off valve 19 are opened. The high-temperature, high-pressure exhaust gas flowing from the compressor outlet splits into two paths. One path enters the water heater heat exchanger 9 for condensation (heating water), and then passes through the first throttling device 7 to reduce pressure. The other path enters the air conditioner indoor heat exchanger 2 for condensation and heat release, heating the indoor air. Then, it passes through the second throttling device 8 to reduce pressure, merges with the first path, and enters the outdoor heat exchanger 3 for evaporation and heat absorption. Finally, it enters the compressor 1 for compression and begins a secondary cycle. In addition, in this mode, the system determines whether the water tank is discharging water by setting the amount of water temperature change. For example, if the water temperature decreases by ΔT ≥ A within a time interval Δt, it is determined that water is being used. In this case, the refrigerant flow is distributed by adjusting the opening of the first throttling device 7 and the second throttling device 8, prioritizing the heating of the water tank. Conversely, if the water temperature decreases by ΔT ≤ B within a time interval Δt, it is determined that no water is being used or only a small amount of water is being discharged. In this case, the refrigerant flow is distributed by adjusting the opening of the first throttling device 7 and the second throttling device 8, prioritizing the heating of the air conditioner. If the water temperature decreases by B < ΔT < A within a time interval Δt, no special adjustment is required, and normal distribution is maintained.

[0043] 3. Air conditioner cooling mode (water heater not heating): The air conditioner is turned on for cooling, the second shut-off valve 11 is closed, the hot water pipe 6 is closed, the first shut-off valve 10 and the third shut-off valve 19 are opened, the high temperature and high pressure flowing out from the exhaust port of the compressor 1 enters the outdoor heat exchanger 3 for condensation and heat release, after passing through the second throttling device 8 for throttling and pressure reduction, it enters the indoor heat exchanger 2 for evaporation and heat absorption, and then enters the compressor 1 for compression and begins the secondary cycle.

[0044] 4. Air Conditioner Heating Mode (Water Heater Not Heating): When the air conditioner is turned on for heating, the second shut-off valve 11 is closed, the hot water pipe 6 is shut off, the first shut-off valve 10 and the third shut-off valve 19 are opened, and the high temperature and high pressure flowing out from the exhaust port of the compressor 1 enters the indoor heat exchanger 2 for condensation and heat release. After passing through the second throttling device 8 for throttling and pressure reduction, it enters the outdoor heat exchanger 3 of the air conditioner for evaporation and heat absorption. Then it enters the compressor 1 for compression and begins the secondary cycle.

[0045] 5. Single water heater heating mode (air conditioner off): With the air conditioner off and the water heater heating, the first shut-off valve 10 and the second throttling device 8 are closed, while the second shut-off valve 11 and the third shut-off valve 19 are open. The high-temperature, high-pressure refrigerant gas flowing from the exhaust port of compressor 1 enters the water heater heat exchanger 9 to condense and release heat to heat the water. After being throttled and depressurized by the first throttling device 7, it enters the outdoor heat exchanger 3 for evaporation and heat absorption, and then enters the compressor 1 for compression to begin the secondary cycle.

[0046] During system operation, the system can automatically switch between running multiple types of terminals simultaneously and running a single type of terminal, based on preset conditions. The specific process is as follows:

[0047] 1. When the air conditioner is cooling and the water heater is heating, if the detected water temperature reaches or exceeds the set temperature and the indoor ambient temperature has not reached the air conditioner's set temperature, or if the difference between the indoor ambient temperature and the air conditioner's set cooling temperature is greater than the set temperature difference, the system will automatically switch to cooling-only mode. It will switch back to the original mode when water heating is required again. Conversely, if the air conditioner detects that the indoor ambient temperature has reached the set temperature but the water temperature switching condition has not been met, it will automatically switch to water heater-only mode. It will switch back to the original mode when cooling is required again.

[0048] 2. When the air conditioner is in heating mode and the water heater is in operation, if the water temperature reaches or exceeds the set room temperature and the indoor ambient temperature does not reach the air conditioner's set temperature, or if the difference between the air conditioner's heating set temperature and the indoor ambient temperature is greater than the set temperature difference, the system will automatically switch to heating mode only. If the air conditioner detects that the indoor ambient temperature has reached the set temperature but the water temperature switching condition has not been met, the system will automatically switch to water heater operation mode only.

[0049] The above-mentioned switching conditions are designed to ensure user needs are met, as well as system reliability and cost-effectiveness.

[0050] The above scheme and the valves used in system operation can be increased or decreased according to the simplification or complexity of the functional design and the number of terminal equipment.

[0051] This heat recovery air source heat pump system, through ingenious design, achieves a highly efficient combination of air conditioning and hot water heating. It not only effectively recovers waste heat from air conditioning operation for hot water heating, significantly improving energy efficiency and reducing operating costs, but also features a compact structure, stable operation, and ease of use, meeting user needs in different seasons and scenarios, resulting in significant economic and environmental benefits. Furthermore, the system possesses automated control and precise adjustment capabilities, adapting to various complex operating environments and providing users with a more comfortable, energy-efficient, and intelligent user experience.

[0052] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0053] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0054] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heat recovery air source heat pump system, characterized in that, The system includes a compressor (1), an indoor heat exchanger (2), an outdoor heat exchanger (3), a water heater assembly (4), and a first four-way valve (5). The first port of the first four-way valve (5) is connected to the exhaust port of the compressor (1), the second port of the first four-way valve (5) is connected to the intake port of the compressor (1), the third port of the first four-way valve (5) is optionally connected to the outdoor heat exchanger (3) and the indoor heat exchanger (2), and the fourth port of the first four-way valve (5) is optionally connected to the outdoor heat exchanger (3) and the indoor heat exchanger (2). The water heater assembly (4) includes a hot water pipe (6), a first throttling device (7) and a water heater heat exchanger (9). The first end of the hot water pipe (6) is connected to the pipe between the exhaust port and the first interface. The second end of the hot water pipe (6) is connected to the pipe between the indoor heat exchanger (2) and the outdoor heat exchanger (3). The water heater heat exchanger (9) and the first throttling device (7) are installed on the hot water pipe (6). The end of the indoor heat exchanger (2) connected to the hot water pipe (6) is provided with a second throttling device (8).

2. The heat recovery air source heat pump system according to claim 1, characterized in that, A first shut-off valve (10) is provided on the connecting pipe between the exhaust port and the first interface of the first four-way valve (5), and a second shut-off valve (11) is also provided on the hot water pipe (6). The second shut-off valve (11) is located at one end of the water heater heat exchanger (9) near the indoor heat exchanger (2).

3. The heat recovery air source heat pump system according to claim 1, characterized in that, The outlet end of the first throttling device (7) is provided with a one-way valve (12).

4. The heat recovery air source heat pump system according to any one of claims 1 to 3, characterized in that, The heat recovery air source heat pump system also includes a second four-way valve (13), a three-way valve, a first pipeline (15), a second pipeline (16), a third pipeline (17), and a fourth pipeline (18). The outdoor heat exchanger (3) is connected to the first port of the second four-way valve (13). The first end of the first pipeline (15) is connected to the third port of the first four-way valve (5), and the second end is connected to the third port of the second four-way valve (13). The first end of the second pipeline (16) is connected to the fourth port of the first four-way valve (5), and the second end is connected to the third port of the three-way valve. The first end of the third pipeline (17) is connected to the second port of the second four-way valve (13), and the second end is connected to the second port of the three-way valve. The indoor heat exchanger (2) is connected to the first port of the three-way valve. The first end of the fourth pipeline (18) is connected to the fourth port of the first four-way valve (5), and the second end is connected to the fourth port of the second four-way valve (13).

5. The heat recovery air source heat pump system according to any one of claims 1 to 3, characterized in that, The heat recovery air source heat pump system further includes a second four-way valve (13), a third four-way valve (14), a first pipeline (15), a second pipeline (16), a third pipeline (17), and a fourth pipeline (18). The outdoor heat exchanger (3) is connected to the first port of the second four-way valve (13). The first end of the first pipeline (15) is connected to the third port of the first four-way valve (5), and the second end is connected to the third port of the second four-way valve (13). The first end of the second pipeline (16) is connected to the fourth port of the first four-way valve (5), and the second end is connected to the third port of the third four-way valve (14). The first end of the third pipeline (17) is connected to the second port of the second four-way valve (13), and the second end is connected to the second port of the third four-way valve (14). The indoor heat exchanger (2) is connected to the first port of the third four-way valve (14). The first end of the fourth pipeline (18) is connected to the fourth port of the first four-way valve (5), and the second end is connected to the fourth port of the second four-way valve (13).

6. The heat recovery air source heat pump system according to claim 1, characterized in that, The outdoor heat exchanger (3) is equipped with a third shut-off valve (19) at one end near the hot water pipe (6).

7. The heat recovery air source heat pump system according to claim 1, characterized in that, The water heater assembly (4) also includes a water tank, and the water heater heat exchanger (9) surrounds the outer periphery of the water tank, or the water heater heat exchanger (9) is built into the water tank.

8. The heat recovery air source heat pump system according to claim 1, characterized in that, The heat recovery air source heat pump system also includes multiple shut-off valves, a first pipeline (15), a second pipeline (16), a third pipeline (17), and a fourth pipeline (18). The first end of the first pipeline (15) is connected to the third interface of the first four-way valve (5), and the second end is connected to the first end of the third pipeline (17). The first end of the second pipeline (16) is connected to the second interface of the first four-way valve (5), and the second end is connected to the second end of the third pipeline (17). The first end of the fourth pipeline (18) is connected at the connection position of the first pipeline (15) and the third pipeline (17), and the second end is connected to the second pipeline (16). The shut-off valves are respectively provided on the first pipeline (15), the second pipeline (16), the third pipeline (17), the fourth pipeline (18), the connecting pipeline from the outdoor heat exchanger (3) to the third pipeline (17), and the connecting pipeline from the indoor heat exchanger (2) to the third pipeline (17).

9. The heat recovery air source heat pump system according to claim 1, characterized in that, The heat recovery air source heat pump system also includes a temperature sensor for sensing the water temperature of the water heater assembly (4) and the temperature of the indoor environment.

10. The heat recovery air source heat pump system according to claim 1, characterized in that, The first throttling device (7) and the second throttling device (8) are electronic expansion valves.

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