An air conditioner

Abstract

The disclosure provides a kind of air conditioner, it is related to air conditioning equipment manufacturing technical field, wherein air conditioner includes outdoor unit and indoor unit.Indoor unit includes cascade heat exchanger, first heat exchanger and second heat exchanger.Cascade heat exchanger includes first heat exchange part and second heat exchange part, first heat exchange part is coupled first circulation pipeline and flows through first refrigerant, and second heat exchange part is coupled second circulation pipeline and flows through second refrigerant.First heat exchanger includes third heat exchange part and fourth heat exchange part, third heat exchange part is coupled with the first water source of first temperature, and fourth heat exchange part is coupled with second circulation pipeline.Second heat exchanger includes fifth heat exchange part and sixth heat exchange part, fifth heat exchange part is coupled with the second water source of second temperature.Boiling point of second refrigerant is higher than the boiling point of first refrigerant.Second temperature is less than first temperature.Sixth heat exchange part is coupled with the suction port of outdoor compressor of outdoor unit via first direction control valve.The air conditioner can provide two different temperature water sources of refrigeration and heating simultaneously.

Description

Technical Field

[0001] This disclosure belongs to the field of air conditioning equipment manufacturing technology, and specifically relates to an air conditioner. Background Technology

[0002] Currently, an increasing number of public buildings are equipped with air conditioning systems, and their multi-functionality has gradually become a focus of social attention and research. In order to meet the diverse needs of different places for air conditioning systems, related technologies such as Chinese patent CN117249596A use cascade heat exchange technology to achieve a variety of different functions, including single heating mode, single cooling mode, single hot water mode, heating + hot water mode, cooling + hot water mode, heating + cooling mode, and heating + cooling + hot water mode.

[0003] Current technologies are limited to producing hot or cold water separately, forcing users to install separate air conditioning and hot water systems. This not only increases costs but also reduces energy efficiency. Furthermore, the air conditioning system must stop operating when defrosting, undoubtedly impacting the user experience. As for existing cascade heat exchangers, they are typically used for hot water; if a household also requires air conditioning, an additional air conditioning system must be installed. Utility Model Content

[0004] This disclosure provides an air conditioner that aims to at least partially solve the technical problem of poor user experience caused by insufficient consideration of the structural and functional integration of air conditioners in related technologies.

[0005] At least one embodiment of this disclosure provides an air conditioner, including: an outdoor unit and an indoor unit, wherein the outdoor unit includes an outdoor compressor having an air intake and an exhaust port, an outdoor directional control valve, and an outdoor heat exchanger, and the indoor unit includes:

[0006] Cascade heat exchanger, the cascade heat exchanger comprising:

[0007] A first heat exchange section, connected to a first circulation pipeline, the first circulation pipeline for circulating a first refrigerant, and...

[0008] The second heat exchange section is connected to the second circulation pipeline, which is used to circulate a second refrigerant that is different from the first refrigerant.

[0009] A first heat exchanger, comprising:

[0010] A third heat exchange section, wherein the third heat exchange section is used to connect to a first water source at a first temperature, and,

[0011] The fourth heat exchange section is connected to the second circulation pipeline;

[0012] The second heat exchanger includes:

[0013] The fifth heat exchange unit is used to connect to a second water source at a second temperature, and,

[0014] Sixth heat exchange section;

[0015] The second refrigerant has a higher boiling point than the first refrigerant, and the second temperature is lower than the first temperature; the sixth heat exchange unit is connected to the suction port of the outdoor compressor via a first directional control valve.

[0016] For example, an air conditioner provided in at least one embodiment of this disclosure further includes: a first shut-off valve, wherein the first directional control valve is connected to the air intake via the first shut-off valve.

[0017] For example, at least one embodiment of the air conditioner provided in this disclosure further includes: a first connector, the first connector being connected to the first directional control valve and the first shut-off valve.

[0018] For example, in an air conditioner provided in at least one embodiment of this disclosure, the indoor unit further includes:

[0019] A first expansion valve is disposed in the second circulation pipeline and located between the second heat exchange section and the fourth heat exchange section; and...

[0020] An indoor compressor, wherein the exhaust port of the indoor compressor is connected to the fourth heat exchange section, and the intake port of the indoor compressor is connected to the second heat exchange section.

[0021] For example, in an air conditioner provided in at least one embodiment of this disclosure, the first heat exchanger further includes a seventh heat exchange section, and the indoor unit further includes:

[0022] The second expansion valve has one end connected to a port of the sixth heat exchange unit that is different from the port connected to the first directional control valve, and the other end connected to the outdoor heat exchanger of the outdoor unit.

[0023] A third expansion valve, one end of which is connected to the seventh heat exchange section, and the other end of which is connected to the outdoor heat exchanger of the outdoor unit; and,

[0024] The fourth expansion valve has one end connected to the first heat exchange section and the other end connected to the outdoor heat exchanger of the outdoor unit.

[0025] For example, in an air conditioner provided in at least one embodiment of this disclosure, the first directional control valve has a first port, a second port, and a third port, and the air conditioner further includes:

[0026] The second connector has one end connected to a port of the first heat exchange unit that is different from the port connected to the fourth expansion valve, another port of the seventh heat exchange unit that is different from the port connected to the third expansion valve, and a third port of the first directional control valve. The other end of the second connector is connected to the outdoor unit.

[0027] The third connector has one end connected to the second expansion valve, the third expansion valve, and the fourth expansion valve, and the other end connected to the outdoor heat exchanger of the outdoor unit.

[0028] For example, in an air conditioner provided in at least one embodiment of this disclosure, the outdoor unit further includes:

[0029] An outdoor expansion valve is connected to one end of the outdoor heat exchanger.

[0030] For example, in an air conditioner provided in at least one embodiment of this disclosure, the outdoor direction control valve includes:

[0031] The first interface is connected to the exhaust port of the outdoor compressor;

[0032] The second interface is connected to the first heat exchange section of the indoor unit;

[0033] A third interface, which is connected to the outdoor heat exchanger; and...

[0034] The fourth interface is connected in parallel with the first branch where the first directional control valve in the indoor unit is located, and then connected to the air intake of the outdoor compressor.

[0035] For example, in an air conditioner provided in at least one embodiment of this disclosure, the outdoor unit further includes:

[0036] A second shut-off valve, one end of which is connected to the second interface, and the other end of which is connected to the second connector of the indoor unit; and,

[0037] The third shut-off valve has one end connected to the outdoor expansion valve and the other end connected to the third connector of the indoor unit.

[0038] Furthermore, one end of the first shut-off valve is connected to the air intake of the outdoor compressor, and the other end of the first shut-off valve is connected to the first connector of the indoor unit.

[0039] For example, in an air conditioner provided in at least one embodiment of this disclosure, the outdoor direction control valve is configured to include a first four-way valve and a second four-way valve; wherein, the exhaust port of the first four-way valve and the exhaust port of the second four-way valve are connected in parallel to serve as the first interface, the intake port of the first four-way valve and the intake port of the second four-way valve are connected in parallel to serve as the fourth interface, the evaporation port of the first four-way valve serves as the second interface, and the condensation port of the second four-way valve serves as the third interface.

[0040] The air conditioner provided in this embodiment can meet a family's needs for cooling, hot water, and chilled water in one stop. Through a highly integrated structural design, it achieves multi-functional integration, ensuring simultaneous operation of cooling, heating, and defrosting functions. This air conditioner not only provides both chilled and hot water (covering both low-temperature and high-temperature hot water) simultaneously, but also significantly improves the user experience. By introducing a first directional control valve and adding a branch circuit from this first directional control valve to the suction port of the outdoor compressor, the first directional control valve 124 can effectively prevent the second heat exchanger 123 from freezing during heating, further enhancing the functional integration of the cascade heat pump system. Furthermore, the application of this air conditioner promotes continuous innovation and progress in heat pump technology, driving technological development in related industries.

[0041] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A schematic diagram illustrating the composition of an air conditioner provided for at least one embodiment of this disclosure;

[0044] Figure 2 A schematic diagram illustrating the composition of another air conditioner provided for at least one embodiment of this disclosure;

[0045] Figure 3 A schematic diagram illustrating the composition of yet another air conditioner provided for at least one embodiment of this disclosure;

[0046] Figure 4 A schematic diagram illustrating the composition of an indoor unit provided for at least one embodiment of this disclosure;

[0047] Figure 5 A schematic diagram illustrating the composition of another indoor unit provided for at least one embodiment of this disclosure;

[0048] Figure 6 A schematic diagram illustrating the composition of an outdoor unit provided for at least one embodiment of this disclosure;

[0049] Figure 7 A schematic diagram illustrating the composition of another outdoor unit provided for at least one embodiment of this disclosure;

[0050] Figure 8 A schematic diagram illustrating the composition of yet another outdoor unit provided for at least one embodiment of this disclosure;

[0051] Figure 9 A schematic diagram of the structure of an outdoor directional control valve provided in at least one embodiment of this disclosure;

[0052] Figure 10 This is a schematic diagram of an air conditioner example structure provided for at least one embodiment of the present disclosure.

[0053] Figure Labels

[0054] 10- Air conditioner; 11- Outdoor unit; 12- Indoor unit; 111- Outdoor compressor; 112- Outdoor directional control valve; 113- Outdoor heat exchanger; 114- First shut-off valve; 115- Outdoor expansion valve; 116- Second shut-off valve; 117- Third shut-off valve; 120- First connector; 121- Cascade heat exchanger; 122- First heat exchanger; 123- Second heat exchanger; 124- First directional control valve; 125- First expansion valve; 126- Indoor compressor; 127- Second expansion valve; 128- Third expansion valve; 129- Fourth expansion valve; 112a- First four-way valve; 112b- Second four-way valve; D- Exhaust port; E- Evaporator port; C- Condensate port; S- Intake port. Detailed Implementation

[0055] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the disclosure. Similarly, the following embodiments are only some, not all, embodiments of the present disclosure, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0056] The terms "first," "second," and "third" used in the embodiments of this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," and "third" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "multiple" means at least two, such as two or three, unless otherwise explicitly specified.

[0057] The terms "comprising" and "having," and any variations thereof, used in the embodiments of this application, are intended to cover non-exclusive inclusion. For example, a process, method, air conditioner, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such process, method, product, or device.

[0058] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] The terms “comprising” and “having”, and any variations thereof, used in embodiments of this disclosure, are intended to cover non-exclusive inclusion. For example, a process, method, air conditioner, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, methods, products, or devices.

[0060] The term "cascade heat exchanger" used in this disclosure refers to a heat exchanger with a multi-layered heat exchange structure, in which each layer independently transfers and exchanges heat. This cascading arrangement effectively improves heat exchange efficiency and achieves a larger heat exchange area within a limited space, thereby enhancing the overall energy efficiency ratio of the air conditioner. The cascade heat exchanger employs advanced heat exchange technology to ensure rapid and stable temperature regulation in both cooling and heating modes, providing users with a more comfortable experience.

[0061] In this disclosure, the term "joint" refers to a key component connecting the pipes to the main body of the outdoor unit. Joints are generally made of high-strength, corrosion-resistant materials to ensure no leakage or damage occurs during long-term use. Through precise design and manufacturing processes, the joint tightly connects the pipes to the outdoor unit, effectively preventing the loss of refrigerant or other working media, thereby ensuring the stability and efficiency of the air conditioning system. Furthermore, the joint has excellent sealing performance and high-pressure resistance, enabling it to adapt to various complex operating environments and ensuring the normal operation of the air conditioning system.

[0062] Figure 1 This is a schematic diagram illustrating the composition of an air conditioner according to at least one embodiment of this disclosure. Figure 1 As shown, the air conditioner 10 may include an outdoor unit 11 and an indoor unit 12.

[0063] The outdoor unit 11 includes an outdoor compressor 111, an outdoor directional control valve 112, and an outdoor heat exchanger 113. The outdoor compressor 111 has an air intake port and an air exhaust port.

[0064] The indoor unit 12 includes a cascade heat exchanger 121, a first heat exchanger 122, and a second heat exchanger 123. The cascade heat exchanger 121 includes a first heat exchange section and a second heat exchange section. The first heat exchange section is connected to a first circulation pipe for circulating a first refrigerant. The second heat exchange section is connected to a second circulation pipe for circulating a second refrigerant different from the first refrigerant. The first heat exchanger 122 includes a third heat exchange section and a fourth heat exchange section. The third heat exchange section is connected to a first water source at a first temperature, and the fourth heat exchange section is connected to a second circulation pipe. The second heat exchanger 123 includes a fifth heat exchange section and a sixth heat exchange section. The fifth heat exchange section is connected to a second water source at a second temperature.

[0065] The boiling point of the second refrigerant is higher than that of the first refrigerant, and the second temperature is lower than the first temperature. The sixth heat exchange unit is connected to the suction port of the outdoor compressor 111 via the first directional control valve 124.

[0066] It should be noted that this disclosure does not limit the connection method of the components in the outdoor unit 11. The components in the outdoor unit 11 can adopt different connection methods and layouts according to actual needs. This flexibility allows the outdoor unit to adapt to different working environments and installation conditions, improving the adaptability and reliability of the air conditioning system. At the same time, this design also facilitates maintenance and repair. The core improvement of this disclosure lies in the introduction of a first directional control valve 124 and the addition of a branch circuit from the first directional control valve 124 to the suction port of the outdoor compressor 111. This improvement allows the air conditioning system to flexibly adjust the refrigerant flow direction according to actual needs, so that the first refrigerant flowing out of the second heat exchanger 123 no longer flows through the first heat exchanger 122 or the cascade heat exchanger 121, but directly flows through the first directional control valve 124 to the suction port of the outdoor compressor 111, mixing or replacing the gas in the outdoor compressor, thereby achieving a more efficient refrigeration cycle.

[0067] The air conditioner provided in at least one embodiment of this disclosure is applicable to any existing air conditioning application scenario that requires the simultaneous preparation of two water temperature sources through cascade heat exchange, particularly air source air conditioning applications, and the embodiments of this disclosure are not limited thereto. For example, this air conditioner can be applied to various places such as residential homes, commercial office buildings, hotels, schools, and hospitals to meet the temperature regulation and hot water supply needs in different scenarios. Through cascade heat exchange technology, this air conditioner can efficiently utilize energy, achieve dual supply of cooling and heating, and simultaneously prepare two water temperature sources: high temperature and low temperature. In addition, this air conditioner can adjust the temperature and water temperature according to user needs, providing users with a comfortable user experience.

[0068] Compared to related technologies, the air conditioner 10 provided by at least one embodiment of this disclosure can meet a family's needs for air conditioning, domestic hot water, and chilled water in one stop. Through a highly integrated structural design, it achieves multi-functional integration, ensuring simultaneous operation of cooling, heating, and defrosting functions. This air conditioner not only provides chilled water and hot water (covering both low-temperature and high-temperature hot water) simultaneously, but also significantly improves the user experience. By introducing a first directional control valve 124 and adding a branch circuit from the first directional control valve 124 to the suction port of the outdoor compressor 111, the second heat exchanger 123 can be effectively prevented from freezing during heating when the first directional control valve 124 is open, further enhancing the functional integration of the cascade heat pump system. Furthermore, the application of this air conditioner promotes continuous innovation and progress in heat pump technology, driving technological development in related industries.

[0069] The cascade heat exchanger 121, as a crucial component of the indoor unit, employs advanced heat exchange technology, effectively improving heat exchange efficiency and ensuring stable operation of the air conditioner in both cooling and heating modes. Furthermore, the cascade heat exchanger 121 features a compact structure, occupying minimal space, which facilitates the overall layout and optimization of the outdoor unit. In addition, its materials can be high-strength and corrosion-resistant, ensuring long-term reliability and durability.

[0070] The external material of the first heat exchanger 122 should have good thermal conductivity and corrosion resistance, be able to adapt to complex and changing outdoor environments, and extend its service life. Through the efficient operation of the first heat exchanger 122, the air conditioner can produce hot water (including low-temperature hot water and high-temperature hot water) during both cooling and heating processes, providing users with a more comfortable user experience.

[0071] The design of the second heat exchanger 123 also emphasizes efficiency and durability. The second heat exchanger 123 should employ an optimized flow channel design to maximize heat exchange efficiency and minimize energy loss. Simultaneously, the materials used in the second heat exchanger 123 should be capable of stable operation under various harsh environments, extending the service life of the overall air conditioning system.

[0072] The first-direction control valve 124 can be installed independently or integrated into the outdoor unit 11 or the indoor unit 12. This flexible configuration allows the air conditioning system to intelligently adjust the flow direction of the refrigerant and heating medium according to different operating modes, thereby optimizing cooling and heating efficiency. Furthermore, the precise control of the first-direction control valve 124 helps maintain the stable operation of the air conditioning system, reducing the possibility of malfunctions. Its design prioritizes durability and reliability, enabling it to operate normally under various extreme climatic conditions, ensuring users enjoy continuous and stable air conditioning service.

[0073] Figure 2 This is a schematic diagram illustrating the composition of another air conditioner provided in at least one embodiment of this disclosure. To precisely control the refrigerant flow entering the outdoor compressor 111, in... Figure 1 Based on the structure shown, such as Figure 2 As shown, the air conditioner also includes a first shut-off valve 114, wherein a first directional control valve 124 is connected to the suction port of the outdoor compressor via the first shut-off valve 114. The first shut-off valve 114 effectively manages the refrigerant flow, ensuring that the outdoor compressor 111 receives an appropriate amount of refrigerant, avoiding overload or insufficient refrigerant supply, thereby improving the overall operating efficiency and stability of the air conditioning system. Figure 2 In this embodiment, the synergistic effect of the first directional control valve 124 and the first shut-off valve 114 enables the air conditioning system to flexibly adjust the refrigerant circulation path according to actual needs, further enhancing the system's adaptability and intelligence. Furthermore, this structural design also facilitates subsequent maintenance and reduces maintenance costs.

[0074] Figure 3 This is a schematic diagram illustrating the composition of another air conditioner provided in at least one embodiment of this disclosure. To ensure the stability and controllability of the refrigerant flow, in... Figure 2 Based on the structure shown, such as Figure 3 As shown, the air conditioner also includes a first connector 120, which is connected to a first directional control valve 124 and a first shut-off valve 114. The first connector 120 guides refrigerant from the first directional control valve 124 to the first heat exchanger 122, while ensuring the stability and controllability of the refrigerant flow. Through close cooperation with the first directional control valve 124 and the first shut-off valve 114, the first connector 120 can precisely regulate the direction and flow rate of the refrigerant, ensuring that the first heat exchanger 122 operates in optimal condition, thereby improving the cooling or heating effect of the air conditioner and meeting diverse user needs.

[0075] As an alternative implementation, the first connector 120 can be integrated into the outdoor unit 11 or the indoor unit 12. This integrated design not only optimizes the overall layout of the air conditioning system, but also further improves the compactness and reliability of the air conditioning system.

[0076] Figure 4 This is a schematic diagram illustrating the composition of an indoor unit according to at least one embodiment of the present disclosure. To achieve heating from a first water source independently of a second water source, such as... Figure 4 As shown, the indoor unit 12 also includes a first expansion valve 125 and an indoor compressor 126. The first expansion valve 125 is located in the second circulation pipeline between the second and fourth heat exchange sections. The exhaust port of the indoor compressor 126 is connected to the fourth heat exchange section, and the suction port of the indoor compressor 126 is connected to the second heat exchange section. This design creates a closed loop for the refrigerant within the indoor unit. Specifically, the refrigerant flows out from the second heat exchange section, is throttled and depressurized by the first expansion valve 125, enters the fourth heat exchange section for heat exchange, and is then drawn in by the indoor compressor 126, compressed, and discharged to the fourth heat exchange section for further heat exchange. This process not only improves the refrigerant utilization efficiency but also enhances the cooling or heating capacity of the indoor unit. Precise control of the first expansion valve 125 is crucial for ensuring the stability and controllability of the refrigerant flow. Users can automatically adjust the refrigerant flow and pressure according to changes in indoor temperature and other actual needs, thereby ensuring that the indoor unit always operates in optimal condition. The efficient operation of the indoor compressor 126 further enhances the cooling or heating efficiency of the air conditioner.

[0077] Figure 5 This is a schematic diagram illustrating the composition of another indoor unit provided in at least one embodiment of the present disclosure. To enhance the functionality and flexibility of the air conditioning system, the first heat exchanger further includes a seventh heat exchange section. Furthermore, as... Figure 5As shown, the indoor unit 12 also includes a second expansion valve 127, a third expansion valve 128, and a fourth expansion valve 129. One end of the second expansion valve 127 is connected to the other port of the sixth heat exchange section, which is different from the port connected to the first directional control valve 124. The other end of the second expansion valve 127 is connected to the outdoor heat exchanger 113 of the outdoor unit 11. One end of the third expansion valve 128 is connected to the seventh heat exchange section, and the other end of the third expansion valve 128 is connected to the outdoor heat exchanger 113 of the outdoor unit 11. One end of the fourth expansion valve 129 is connected to the first heat exchange section, and the other end is connected to the outdoor heat exchanger 113 of the outdoor unit 11. This design further enriches the functionality and flexibility of the air conditioning system. The addition of the seventh heat exchange section provides the indoor unit 12 with more options and control points during the heat exchange process. The precise regulation of the second expansion valve 127, the third expansion valve 128, and the fourth expansion valve 129 allows for more detailed adjustment of the refrigerant flow and pressure according to different operating conditions and user needs. For example, when rapid cooling or heating is needed, the opening of the corresponding expansion valve can be increased to increase the refrigerant flow, thereby improving heat exchange efficiency. Conversely, when the indoor temperature approaches the set value, the opening of the expansion valve can be reduced to decrease the refrigerant flow, preventing over-cooling or over-heating and achieving energy savings. Furthermore, this design enhances the stability and reliability of the air conditioning system. The coordinated operation of multiple expansion valves more effectively balances the internal pressure and temperature of the system, reducing malfunctions caused by pressure fluctuations or uneven temperature. Simultaneously, the inclusion of multiple heat exchange units allows the air conditioning system to exhibit superior adaptability and resilience in the face of complex and changing operating environments.

[0078] In some embodiments, the first directional control valve 124 has a first port, a second port, and a third port, and the air conditioner also includes a second connector and a third connector. One end of the second connector is connected to a port of the first heat exchange section (different from the port connected to the fourth expansion valve 129), a port of the seventh heat exchange section (different from the port connected to the third expansion valve 128), and the third port of the first directional control valve. The other end of the second connector is connected to the outdoor unit 11. One end of the third connector is connected to the second expansion valve 127, the third expansion valve 128, and the fourth expansion valve 129, and the other end of the third connector is connected to the outdoor heat exchanger 113 of the outdoor unit 11. The ingenious aspect of this structural design is its ability to flexibly adjust the flow direction and distribution of the refrigerant. When the air conditioning system is in different operating modes or conditions, the first directional control valve 124 can guide the refrigerant through different paths by controlling the opening and closing states of its various ports. For example, in heating mode, the first directional control valve may guide more refrigerant to flow through the first and seventh heat exchange sections to improve heating efficiency; while in cooling mode, it may adjust the refrigerant flow direction, directing it to flow more through other heat exchange sections to meet cooling demands. The second and third connectors further enhance the flexibility and controllability of the air conditioning system. The second connector, by connecting different ports of multiple heat exchange sections and the third port of the first directional control valve, enables flexible refrigerant distribution among these components. The third connector connects the second, third, and fourth expansion valves and connects to the outdoor heat exchanger, forming a highly efficient heat exchange system.

[0079] Figure 6 This is a schematic diagram illustrating the composition of an outdoor unit according to at least one embodiment of this disclosure. Figure 6 As shown, in Figure 1 In addition to the above, the outdoor unit 11 also includes an outdoor expansion valve 115, which is connected to one end of the outdoor heat exchanger 113. The outdoor expansion valve 115 further enhances the flexibility and efficiency of the air conditioning system. Specifically, the outdoor expansion valve 115 can precisely adjust the refrigerant flow according to system requirements, thereby optimizing the heat exchange process of the outdoor heat exchanger 113. This adjustment capability not only helps maintain stable pressure and temperature within the system but also improves the energy efficiency ratio of the air conditioning system under different operating conditions, reducing energy consumption. Furthermore, the coordinated operation of the outdoor expansion valve 115 and the outdoor heat exchanger 113 enables the air conditioning system to maintain excellent cooling or heating performance under extreme weather conditions or high load operation.

[0080] Figure 7 This is a schematic diagram illustrating the composition of another outdoor unit provided in at least one embodiment of the present disclosure. To achieve precise control of the first refrigerant flow direction in the outdoor unit 11, such as... Figure 7 As shown, in Figure 6Based on this, the outdoor directional control valve 112 includes a first interface, a second interface, a third interface, and a fourth interface. The first interface is connected to the exhaust port of the outdoor compressor 111, the second interface is connected to the first heat exchange section of the indoor unit 12, the third interface is connected to the outdoor heat exchanger 113, and the fourth interface is connected in parallel with the first branch containing the first directional control valve 124 in the indoor unit 12, and then connected to the suction port of the outdoor compressor 111. This design allows the outdoor directional control valve 112 to flexibly regulate the flow direction of the first refrigerant, further improving the operating efficiency and adaptability of the air conditioning system. Specifically, by adjusting the connection status of each interface of the outdoor directional control valve 112, precise control of the first refrigerant circulation path can be achieved. For example, in cooling mode, by configuring the outdoor directional control valve 112, the refrigerant flows out from the exhaust port of the outdoor compressor 111, undergoes heat exchange in the outdoor heat exchanger 113, then flows to the indoor unit 12 for further heat exchange, and finally returns to the suction port of the outdoor compressor 111 to complete the cycle. In heating mode, the refrigerant flow direction can be changed by adjusting the connection status of the outdoor direction control valve 112, allowing for different heat exchange processes between the indoor and outdoor units to meet heating demands. This flexible control method not only improves the operating efficiency of the air conditioning system but also enhances its ability to adapt to different climatic conditions and operating modes.

[0081] Figure 8 This is a schematic diagram illustrating the composition of another outdoor unit provided in at least one embodiment of the present disclosure. For further precise control of the first refrigerant flow direction in the outdoor unit 11, such as... Figure 8 As shown, in Figure 7 In addition to the above, the outdoor unit 11 also includes a second shut-off valve 116 and a third shut-off valve 117. One end of the second shut-off valve 116 is connected to the second interface, and the other end is connected to the second connector of the indoor unit 12. One end of the third shut-off valve 117 is connected to the outdoor expansion valve 115, and the other end is connected to the third connector of the indoor unit 12. One end of the first shut-off valve 114 is connected to the suction port of the outdoor compressor 111, and the other end is connected to the first connector 120 of the indoor unit 12. The introduction of the second shut-off valve 116 and the third shut-off valve 117 provides additional control points for the flow of refrigerant between the outdoor unit 11 and the indoor unit 12. Under specific operating conditions, the direction of refrigerant flow can be precisely controlled by closing or opening these shut-off valves, thereby optimizing the operating efficiency and performance of the air conditioning system. Meanwhile, the combined use of the first shut-off valve 114, the second shut-off valve 116, and the third shut-off valve 117 also facilitates the maintenance and repair of the air conditioning system, enabling technicians to quickly cut off or connect specific refrigerant flow paths as needed.

[0082] Figure 9This is a schematic diagram of the structure of an outdoor directional control valve provided in at least one embodiment of this disclosure. In order to... Figure 9 As shown, the outdoor directional control valve 112 is configured to include a first four-way valve 112a and a second four-way valve 112b. The exhaust ports of the first four-way valve 112a and the second four-way valve 112b are connected in parallel to form a first interface; the suction ports of the first four-way valve 112a and the second four-way valve 112b are connected in parallel to form a fourth interface; the evaporator port of the first four-way valve 112a serves as a second interface; and the condenser port of the second four-way valve 112b serves as a third interface. This configuration allows the outdoor directional control valve 112 to efficiently regulate the flow of refrigerant. The first refrigerant enters through the exhaust ports of the first four-way valve 112a and the second four-way valve 112b. It can circulate in the indoor unit through the evaporator port (i.e., the second interface) of the first four-way valve 112a, and then flow to the suction port of the outdoor compressor 111 through the first directional control valve 124. Alternatively, it can enter the outdoor heat exchanger 113 through the condenser port (i.e., the third interface) of the second four-way valve 112b to complete cooling before entering the indoor unit 11. This parallel structure not only improves the flexibility of the air conditioning system but also enhances its reliability and stability. The coordinated operation of the first four-way valve 112a and the second four-way valve 112b allows the air conditioning system to adjust the refrigerant flow direction and circulation path according to actual needs, thereby optimizing the system's operating efficiency and cooling / heating performance.

[0083] In a preferred embodiment, the first expansion valve 125, the second expansion valve 127, the third expansion valve 128, the fourth expansion valve 129, and the outdoor expansion valve 115 are all electronic expansion valves. Electronic expansion valves have the advantages of fast response and high adjustment accuracy, enabling them to adjust the refrigerant flow in real time according to system requirements, thereby optimizing the operating efficiency of the air conditioning system. Furthermore, electronic expansion valves also have lower energy consumption and a longer service life, helping to reduce the overall operating cost of the air conditioning system.

[0084] In some embodiments, the first refrigerant is R410A (boiling point -51.6°C), and the second refrigerant is R134A (boiling point -26.1°C). In the first heat exchanger 122, R410A and R134A refrigerants can participate in the heat exchange process separately or simultaneously. Due to its lower boiling point, R410A refrigerant can evaporate at lower temperatures, thus more effectively absorbing indoor heat and dissipating it outdoors through the circulation system. R134A refrigerant, on the other hand, can provide stable heating performance under different ambient temperatures. By rationally selecting and using these two refrigerants, the cooling and heating performance of the air conditioning system can be further optimized to meet the cooling and heating needs of different users in different environments. Simultaneously, the design of the first heat exchanger 122 also fully considers the refrigerant's flowability and heat exchange efficiency, ensuring that the refrigerant can fully release or absorb heat as it flows through, thereby achieving a highly efficient heat exchange process.

[0085] In some embodiments, the air conditioner further includes a hot water outlet valve 13 and a hot water inlet valve 14 disposed at the port of the first heat exchanger 122, and a cold water outlet valve 15 and a cold water inlet valve 16 disposed at the port of the second heat exchanger 123, such as Figure 10 As shown. The design of these valves enables the air conditioning system to not only provide traditional cooling and heating functions, but also to supply hot water. Hot water outlet valve 13 and hot water inlet valve 14 allow the use of heat released by R410A and R134A refrigerants in the first heat exchanger 122 during the refrigeration cycle to heat the flowing water, thereby providing hot water to users. Similarly, cold water outlet valve 15 and cold water inlet valve 16 in the second heat exchanger 123 can utilize the cooling effect of the refrigerant to produce chilled water for specific cooling needs. This design not only improves the energy efficiency of the air conditioning system but also increases its versatility, meeting the diverse living needs of users.

[0086] Figure 10 This is a schematic diagram of an air conditioner example structure provided in at least one embodiment of the present disclosure. The air conditioner has the following functions: function A, that is, only cooling water or low-temperature water is defrosted; function B, that is, only high-temperature hot water is produced; function C, that is, only low-temperature hot water is heated; function D, that is, both cooling water and low-temperature hot water are produced simultaneously; function E, that is, both cooling water and high-temperature hot water are produced simultaneously; function F, that high-temperature water is defrosted; and function G, that both high-temperature and low-temperature water are defrosted simultaneously.

[0087] For function A, in the scenario of only cooling water, the status settings of each component in the air conditioner are as follows: the first four-way valve 112a in the outdoor directional control valve 112 is open (ON), the second four-way valve 112b is closed (OFF), and the third four-way valve in the first directional control valve 124 is closed. The indoor compressor 126 stops, the outdoor expansion valve 115 is fully open, the second expansion valve 127 is throttled, the third expansion valve 128 / fourth expansion valve 129 maintains a partial opening, and the outdoor heat exchanger 113 / second heat exchanger 123 operates. The second heat exchanger 123 produces chilled water, and the outdoor heat exchanger 113 condenses and dissipates heat. The high-temperature and high-pressure refrigerant output from the outdoor compressor 111 is divided into three paths after passing through the second branch containing the second four-way valve 112b, the outdoor heat exchanger 113, and the outdoor expansion valve 115. The first path passes through the third branch containing the second expansion valve 127, the second heat exchanger 123, and the first directional control valve 124, and then returns to the outdoor compressor 111 via the first branch containing the first directional control valve 124 and the first shut-off valve 114. The second path passes through the fourth branch containing the third expansion valve 128 and the first heat exchanger 122, and returns to the outdoor compressor 111. The third path passes through the fifth branch containing the fourth expansion valve 129 and the cascade heat exchanger 121, and returns to the outdoor compressor 111.

[0088] For Function B, in the scenario of only producing high-temperature hot water (domestic hot water), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is open, the first directional control valve 124 is switched from closed to open (to prevent the second heat exchanger 123 from freezing), the indoor compressor 126 is working, the outdoor expansion valve 115 / first expansion valve 125 controls throttling, the second expansion valve 127 / third expansion valve 128 maintains a partial opening, the fourth expansion valve 129 is fully open, the outdoor heat exchanger 113 / first heat exchanger 122 is working, the first heat exchanger 122 produces high-temperature hot water, and the outdoor heat exchanger 113 absorbs heat through evaporation. The high-temperature and high-pressure first refrigerant output by the outdoor compressor 111 is divided into three paths after passing through the sixth branch where the first four-way valve 112a and the second shut-off valve 116 are located. The first path passes through the third branch where the first directional control valve 124, the second heat exchanger 123 and the second expansion valve 127 are located and enters the outdoor expansion valve 115. The second path passes through the fourth branch where the first heat exchanger 122 and the third expansion valve 128 are located and enters the outdoor expansion valve 115. The third path passes through the fifth branch where the cascade heat exchanger 121 and the fourth expansion valve 129 are located and enters the outdoor expansion valve 115. Then, it returns to the outdoor compressor 111 via the second branch after passing through the outdoor expansion valve 115.

[0089] For function C, in scenarios where only low-temperature hot water is produced (e.g., underfloor heating), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is closed, the first directional control valve 124 switches from closed to open (to prevent the second heat exchanger 123 from freezing), the indoor compressor 126 stops, the outdoor expansion valve 115 throttles, the second expansion valve 127 / fourth expansion valve 129 maintains a partial opening (not the main branch), the third expansion valve 128 is fully open, and the outdoor heat exchanger 113 / first heat exchanger 122 operates. The first heat exchanger 122 produces low-temperature hot water, the outdoor heat exchanger 113 absorbs heat through evaporation, and the first heat exchanger 122 acts as a condenser. The flow direction of the first refrigerant is the same as in function B, and will not be repeated here.

[0090] For function D, the scenarios of simultaneously producing cold water and low-temperature hot water are divided into the following three situations.

[0091] When the low-temperature hot water load is approximately equal to the chilled water load (first scenario), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is open, the first directional control valve 124 is closed, the indoor compressor 126 is stopped, the outdoor expansion valve 115 is closed, the second expansion valve 127 is throttled, the third expansion valve 128 is fully open, and the first heat exchanger 122 and the second heat exchanger 123 are operating. The second heat exchanger 123 evaporates and absorbs heat from the water side to produce chilled water, while the first heat exchanger 122 condenses to produce hot water. The flow direction of the first refrigerant is the same as that of function B, and will not be described further here.

[0092] When the low-temperature hot water load > the chilled water load (second case), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is open, the first directional control valve 124 is closed, the indoor compressor 126 stops, the outdoor expansion valve 115 / second expansion valve 127 throttles and regulates the refrigerant flow into the outdoor heat exchanger 113 / second heat exchanger 123, the third expansion valve 128 is fully open, the fourth expansion valve 129 maintains a partial opening, and the outdoor heat exchanger 113 / first heat exchanger 122 / second heat exchanger 123 are working. The outdoor heat exchanger 113 evaporates and absorbs heat from the air, the second heat exchanger 123 evaporates and absorbs heat from the water side to produce chilled water, and the first heat exchanger 122 condenses to produce hot water. The flow direction of the first refrigerant is the same as that of function B, and will not be described again here.

[0093] When the low-temperature hot water load is less than the cold water load (third case), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is closed, the first directional control valve 124 is closed, the indoor compressor 126 is stopped, the outdoor expansion valve 115 / third expansion valve 128 throttles and regulates the refrigerant flow into the outdoor heat exchanger 113 / first heat exchanger 122, the second expansion valve 127 throttles, the fourth expansion valve 129 maintains a partial opening, and the outdoor heat exchanger 113 / first heat exchanger 122 / second heat exchanger 123 are operating. The outdoor heat exchanger 113 condenses and dissipates heat into the air, the second heat exchanger 123 evaporates and absorbs heat from the water side to produce cold water, and the first heat exchanger 122 condenses to produce hot water. The high-temperature and high-pressure first refrigerant output by the outdoor compressor 111 is divided into two paths: one path enters the second four-way valve 112b to achieve the flow direction of function A, and the other path enters the first four-way valve 112a to achieve the flow direction of function B.

[0094] For Function E, which simultaneously produces both cold water and hot water, there are three scenarios:

[0095] When the high-temperature hot water load is approximately equal to the cold water load (first scenario), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is open, the first directional control valve 124 is closed, the indoor compressor 126 is running, the outdoor expansion valve 115 is closed, the second expansion valve 127 / first expansion valve 125 is throttling, the third expansion valve 128 maintains a partial opening, the fourth expansion valve 129 is fully open, and the first heat exchanger 122 / second heat exchanger 123 is operating. The outdoor heat exchanger 113 is in evaporation standby mode and does not work. The second heat exchanger 123 evaporates and absorbs heat from the water side to produce cold water, while the first heat exchanger 122 condenses to produce hot water. The flow direction of the first refrigerant is the same as that of function B, and will not be described further here.

[0096] When the high-temperature hot water load exceeds the cold water load (second case), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is open, the first directional control valve 124 is closed, the indoor compressor 126 is running, the fourth expansion valve 129 is fully open, the outdoor expansion valve 115 / second expansion valve 127 / first expansion valve 125 throttles, the third expansion valve 128 maintains a partial opening, the second expansion valve 127 / first expansion valve 125 regulates the refrigerant flow into the outdoor heat exchanger 113 / second heat exchanger 123, the outdoor heat exchanger 113 / first heat exchanger 122 / second heat exchanger 123 are working, the outdoor heat exchanger 113 evaporates and absorbs heat from the environment, the second heat exchanger 123 evaporates and absorbs heat from the water side to produce cold water, and the first heat exchanger 122 condenses to produce hot water. The flow direction of the first refrigerant is the same as that of function B, and will not be described again here.

[0097] When the high-temperature hot water load is less than the cold water load (third case), the status settings of each component in the air conditioner are as follows: the first four-way valve 112a is open, the second four-way valve 112b is closed, the first directional control valve 124 is closed, the indoor compressor 126 is running, the outdoor expansion valve 115 / fourth expansion valve 129 regulates the flow into the outdoor heat exchanger 113 / 31, the second expansion valve 127 / first expansion valve 125 throttles the flow, the third expansion valve 128 maintains a partial opening, and the outdoor heat exchanger 113 / first heat exchanger 122 / second heat exchanger 123 are operating. The outdoor heat exchanger 113 condenses and releases heat to the environment, the second heat exchanger 123 evaporates and absorbs heat from the water side to produce cold water, and the first heat exchanger 122 condenses to produce hot water. The high-temperature, high-pressure refrigerant output from the outdoor compressor 111 is divided into two paths: one path enters the second four-way valve 112b to achieve the flow direction of function A, and the other path enters the first four-way valve 112a to achieve the flow direction of function B.

[0098] For Function F, which uses high-temperature water for defrosting, the status settings of the components inside the air conditioner are as follows: the first four-way valve 112a is closed, the second four-way valve 112b is closed, the first directional control valve 124 is closed, the indoor compressor 126 is stopped, the outdoor expansion valve 115 is fully open, the third expansion valve 128 is throttled, the second expansion valve 127 / fourth expansion valve 129 is closed, and the outdoor heat exchanger 113 / first heat exchanger 122 is operating. The outdoor heat exchanger 113 performs condensation defrosting, and the first heat exchanger 122 evaporates and absorbs heat from the water side. The flow direction of the first refrigerant is the same as in Function A, and will not be repeated here.

[0099] For Function G, in the scenario where high and low temperature water are used simultaneously for defrosting, the status settings of each component inside the air conditioner are as follows: the first four-way valve 112a is closed, the second four-way valve 112b is closed, the first directional control valve 124 is closed, the indoor compressor 126 is stopped, the outdoor expansion valve 115 is fully open, the second expansion valve 127 / third expansion valve 128 throttles, the fourth expansion valve 129 is closed, and the outdoor heat exchanger 113 / first heat exchanger 122 / second heat exchanger 123 are operating. The outdoor heat exchanger 113 performs condensation defrosting, while the first heat exchanger 122 / second heat exchanger 123 evaporates and absorbs heat from the water side. The flow direction of the first refrigerant is the same as in Function A, and will not be repeated here.

[0100] Furthermore, while simultaneously cooling water and producing hot water, continuous cooling water and hot water defrosting can also be achieved. Specifically, in function D, when frost is detected on the outdoor heat exchanger 113, the second four-way valve 112b can be switched to switch the outdoor heat exchanger 113 from evaporation to condensation to achieve defrosting. And, in function E, when frost is detected on the outdoor heat exchanger 113, the second four-way valve 112b can be switched to switch the outdoor heat exchanger 113 from evaporation to condensation to achieve defrosting.

[0101] In addition, the air conditioner 10 can also be equipped with a fault self-diagnosis module and an alarm module according to actual needs. Once a fault occurs, it can be detected in time and the user is reminded to carry out maintenance, thereby ensuring the stability and reliability of the air conditioner 10.

[0102] From the above description, it can be seen that this disclosure achieves at least the following technical effects:

[0103] 1. Based on the introduction of the first directional control valve, a branch formed by the first directional control valve 124, the first connector 120 and the first shut-off valve 114 is added. When the first directional control valve 124 is opened, it can effectively prevent the second heat exchanger 123 from freezing during heating, further improving the functional integration of the air conditioner.

[0104] 2. Low-temperature underfloor heating can be achieved through an outdoor compressor 111 (low-temperature stage compressor), and high-temperature hot water can be achieved through an indoor compressor (high-temperature stage compressor).

[0105] 3. When the air conditioner is turned on and simultaneously cooling water and producing hot water, it can also continuously cool water and produce hot water for defrosting.

[0106] Although embodiments of the present disclosure have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present disclosure, and such modifications and variations all fall within the scope defined by the appended claims.

[0107] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. An air conditioner, comprising: An outdoor unit and an indoor unit, wherein the outdoor unit includes an outdoor compressor having an air intake and an exhaust port, an outdoor directional control valve, and an outdoor heat exchanger, characterized in that the indoor unit includes: Cascade heat exchanger, the cascade heat exchanger comprising: A first heat exchange section, connected to a first circulation pipeline, the first circulation pipeline for circulating a first refrigerant, and... The second heat exchange section is connected to the second circulation pipeline, which is used to circulate a second refrigerant that is different from the first refrigerant. A first heat exchanger, comprising: A third heat exchange section, wherein the third heat exchange section is used to connect to a first water source at a first temperature, and, The fourth heat exchange section is connected to the second circulation pipeline; The second heat exchanger includes: The fifth heat exchange unit is used to connect to a second water source at a second temperature, and, Sixth heat exchange section; The second refrigerant has a higher boiling point than the first refrigerant, and the second temperature is lower than the first temperature; the sixth heat exchange unit is connected to the suction port of the outdoor compressor via a first directional control valve.

2. The air conditioner according to claim 1, characterized in that, Also includes: The first shut-off valve, the first directional control valve is connected to the intake port via the first shut-off valve.

3. The air conditioner according to claim 2, characterized in that, Also includes: The first connector is connected to the first directional control valve and the first shut-off valve.

4. The air conditioner according to claim 1, characterized in that, The indoor unit also includes: A first expansion valve is disposed in the second circulation pipeline and located between the second heat exchange section and the fourth heat exchange section; and... An indoor compressor, wherein the exhaust port of the indoor compressor is connected to the fourth heat exchange section, and the intake port of the indoor compressor is connected to the second heat exchange section.

5. The air conditioner according to claim 3, characterized in that, The first heat exchanger further includes a seventh heat exchange section, and the indoor unit further includes: The second expansion valve has one end connected to a port of the sixth heat exchange unit that is different from the port connected to the first directional control valve, and the other end connected to the outdoor heat exchanger of the outdoor unit. A third expansion valve, one end of which is connected to the seventh heat exchange section, and the other end of which is connected to the outdoor heat exchanger of the outdoor unit; and, The fourth expansion valve has one end connected to the first heat exchange section and the other end connected to the outdoor heat exchanger of the outdoor unit.

6. The air conditioner according to claim 5, characterized in that, The first directional control valve has a first port, a second port, and a third port, and the air conditioner further includes: The second connector has one end connected to a port of the first heat exchange unit (different from the port connected to the fourth expansion valve), a port of the seventh heat exchange unit (different from the port connected to the third expansion valve), and a third port of the first directional control valve; the other end of the second connector is connected to the outdoor unit. The third connector has one end connected to the second expansion valve, the third expansion valve and the fourth expansion valve respectively, and the other end connected to the outdoor heat exchanger of the outdoor unit.

7. The air conditioner according to claim 6, characterized in that, The outdoor unit also includes: An outdoor expansion valve is connected to one end of the outdoor heat exchanger.

8. The air conditioner according to claim 7, characterized in that, The outdoor directional control valve includes: The first interface is connected to the exhaust port of the outdoor compressor; The second interface is connected to the first heat exchange section of the indoor unit; A third interface, which is connected to the outdoor heat exchanger; and... The fourth interface is connected in parallel with the first branch where the first directional control valve in the indoor unit is located, and then connected to the air intake of the outdoor compressor.

9. The air conditioner according to claim 8, characterized in that, The outdoor unit also includes: A second shut-off valve, one end of which is connected to the second interface, and the other end of which is connected to the second connector of the indoor unit; and, The third shut-off valve has one end connected to the outdoor expansion valve and the other end connected to the third connector of the indoor unit. Furthermore, one end of the first shut-off valve is connected to the air intake of the outdoor compressor, and the other end of the first shut-off valve is connected to the first connector of the indoor unit.

10. The air conditioner according to claim 8, characterized in that, The outdoor directional control valve is configured to include a first four-way valve and a second four-way valve; wherein, the exhaust port of the first four-way valve and the exhaust port of the second four-way valve are connected in parallel to form the first interface, the intake port of the first four-way valve and the intake port of the second four-way valve are connected in parallel to form the fourth interface, the evaporation port of the first four-way valve serves as the second interface, and the condensation port of the second four-way valve serves as the third interface.

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