Air conditioning system

Abstract

The application discloses an air conditioning system, which comprises a compressor, a reversing valve, an indoor heat exchanger and an outdoor heat exchanger, the reversing valve is switchable between a first state and a second state, the outdoor heat exchanger is provided with a first interface, a second interface and a third interface, when the air conditioning system is in refrigeration, the reversing valve is switched to the first state, refrigerant is adapted to flow into the outdoor heat exchanger from the first interface and then flow out of the outdoor heat exchanger through the third interface, when the air conditioning system is in heating, the reversing valve is switched to the second state, refrigerant is adapted to flow into the outdoor heat exchanger from the third interface and then flow out of the outdoor heat exchanger through the first interface and the second interface respectively. According to the air conditioning system, refrigerant can be switched to pipelines of different pipe passes when refrigeration and heating, different heat exchange requirements in refrigeration and heating can be adapted, heat exchange efficiency of the air conditioning system in refrigeration and heating can be ensured, and the energy efficiency of the air conditioning system is improved.

Description

[0001] This case is a divisional application of Chinese patent application number 202210593530.6, filed on 2022-05-27, entitled "Reversing Valve and Air Conditioning System Having Therethe". Technical Field

[0002] This invention relates to the field of household appliance technology, and in particular to an air conditioning system. Background Technology

[0003] In related technologies, air conditioners mainly use four-way reversing valves to achieve basic switching between cooling and heating functions. However, due to its inherent characteristics, the four-way valve can only change the flow of refrigerant from the exhaust pipe to the indoor or outdoor heat exchanger, thereby switching between cooling and heating. But since the flow path of the heat exchanger is fixed, the refrigerant pressure and other states differ greatly in the same heat exchanger, making it impossible to achieve optimal heat exchange effect. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an air conditioning system that switches the refrigerant to different pipe passes to adapt to different heat exchange requirements during cooling and heating, ensuring the heat exchange efficiency of the air conditioning system during cooling and heating, and improving the energy efficiency of the air conditioning system.

[0005] An air conditioning system according to the present invention includes: a compressor having an exhaust port and a return port; a reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, the first valve port being connected to the exhaust port, the fourth valve port being connected to the return port, and the reversing valve being switchable between a first state and a second state; an indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; an outdoor heat exchanger and a throttling element, the outdoor heat exchanger having a first interface, a second interface, and a third interface, the first interface being connected to the second valve port, the second interface being connected to the third valve port, and the throttling element being connected to the second... Between the end and the third interface; when the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, the fourth valve port and the fifth valve port are connected, and the refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then flow out of the outdoor heat exchanger through the third interface; when the air conditioning system is heating, the reversing valve switches to the second state, the first valve port and the fifth valve port are connected, the second valve port and the third valve port are both connected to the fourth valve port, and the refrigerant is suitable to flow into the outdoor heat exchanger from the third interface and then flow out of the outdoor heat exchanger through the first interface and the second interface respectively.

[0006] According to the air conditioning system of the present invention, when the air conditioning system is cooling and heating, the refrigerant can flow through pipelines with different tube passes in the outdoor heat exchanger, thereby adapting to different heat exchange requirements during cooling and heating, ensuring the heat exchange efficiency of the air conditioning system during cooling and heating respectively, improving the energy efficiency of the air conditioning system, and thus improving the overall performance of the air conditioning system.

[0007] In some embodiments, when the air conditioning system is cooling, at least some of the plurality of heat exchange units are connected in series; when the air conditioning system is heating, the plurality of heat exchange units are connected in parallel.

[0008] In some embodiments, when the air conditioning system is cooling, at least some of the plurality of heat exchange units are connected in series between the first interface and the third interface; when the air conditioning system is heating, the plurality of heat exchange units are connected in parallel between the third interface and the fourth valve port.

[0009] In some embodiments, the outdoor heat exchanger includes a plurality of heat exchange sections, the plurality of heat exchange sections including a first heat exchange section, a second heat exchange section and a third heat exchange section; when the air conditioning system is cooling, the third heat exchange section, the first heat exchange section and the second heat exchange section are connected in series; when the air conditioning system is heating, the third heat exchange section, the first heat exchange section and the second heat exchange section are connected in parallel.

[0010] In some embodiments, when the air conditioning system is cooling, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in series between the first interface and the third interface; when the air conditioning system is heating, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in parallel between the third interface and the fourth valve port.

[0011] In some embodiments, the outdoor heat exchanger includes a plurality of heat exchange sections, the plurality of heat exchange sections including a first heat exchange section, a second heat exchange section, a third heat exchange section and a fourth heat exchange section; when the air conditioning system is cooling, the third heat exchange section and the fourth heat exchange section are connected in parallel and then connected in series with the first heat exchange section and the second heat exchange section; when the air conditioning system is heating, the first heat exchange section, the second heat exchange section, the third heat exchange section and the fourth heat exchange section are connected in parallel.

[0012] In some embodiments, when the air conditioning system is cooling, the third heat exchanger and the fourth heat exchanger are connected in parallel and then connected in series with the first heat exchanger and the second heat exchanger between the first interface and the third interface; when the air conditioning system is heating, the first heat exchanger and the second heat exchanger are connected in parallel between the third interface and the second interface, the third heat exchanger and the fourth heat exchanger are connected in parallel between the third interface and the first interface, and the fourth heat exchanger, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in parallel between the third interface and the fourth valve port.

[0013] In some embodiments, the outdoor heat exchanger includes multiple heat exchange sections, and the air conditioning system further includes a control valve. The multiple heat exchange sections include a first heat exchange section and a second heat exchange section. The first heat exchange section has a first port and a second port, and the second heat exchange section has a third port and a fourth port. The control valve is connected between the first port and the fourth port. The first port is connected to a first interface, and the fourth port is connected to a third interface. The second interface connects the second port and the third port. When the air conditioning system is cooling, the control valve is closed, and the first heat exchange section and the second heat exchange section are connected in series between the first interface and the third interface. When the air conditioning system is heating, the control valve is open, and the first heat exchange section and the second heat exchange section are connected in parallel between the third interface and the second interface.

[0014] In some embodiments, the outdoor heat exchanger includes multiple heat exchange sections, and the air conditioning system further includes a control valve. The multiple heat exchange sections include a first heat exchange section, a second heat exchange section, and a third heat exchange section. The first heat exchange section has a first port and a second port, and the second heat exchange section has a third port and a fourth port. The control valve is connected between the first port and the fourth port. One end of the third heat exchange section is connected to the first port, and the other end is connected to the first interface. The fourth port is connected to the third interface. The second interface connects the second port and the third port. The second port and the third port are connected. When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is heating, the control valve is open, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in parallel.

[0015] In some embodiments, the outdoor heat exchanger includes a plurality of heat exchange sections, and the outdoor heat exchanger includes a heat exchange tube assembly. The plurality of heat exchange sections include a first heat exchange section, a second heat exchange section, and a third heat exchange section. The heat exchange tube assembly includes the first heat exchange section, the second heat exchange section, a first pipeline, and a second pipeline. The first heat exchange section has a first port and a second port, and the second heat exchange section has a third port and a fourth port. The first port and the fourth port are connected through the first pipeline, and the second port and the third port are connected through the second pipeline. Both the first port and the third port are formed on... The first pipe is arranged at intervals, and the second interface is formed on the second pipe. The air conditioning system further includes a third pipe, a fourth pipe, and a fifth pipe. The third pipe is connected between the second valve port and the first pipe. The third heat exchange unit is connected in series on the third pipe. The fourth pipe is connected between the third valve port and the second interface. The fifth pipe is connected between the second end and the third interface. The throttling element is connected in series on the fifth pipe. A control valve is connected in series on the first pipe. The control valve is connected between the first pipe port and the fourth pipe port.

[0016] In some embodiments, when the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series; when the air conditioning system is heating, the control valve is open, and the first heat exchange section, the second heat exchange section, and the third heat exchange section are connected in parallel.

[0017] In some embodiments, when the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series between the first interface and the third interface; when the air conditioning system is heating, the control valve is open, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in parallel between the third interface and the fourth valve port.

[0018] In some embodiments, when the air conditioning system is cooling, the control valve is closed, the third valve port is closed, the first valve port and the second valve port are connected, the fourth valve port and the fifth valve port are connected, and the refrigerant flowing out of the second valve port enters the third heat exchange section through the third pipeline for heat exchange, and then sequentially passes through the first pipeline, the first port, the second port, the second pipeline, the third port, the fourth port, the first pipeline, the third interface, and the fifth pipeline; when the air conditioning system is heating, the first valve port is connected to the fifth valve port, the second valve port and the third valve port are both connected to the fourth valve port, the control valve is open, and the throttling element... The refrigerant flows out sequentially through the third port and the first pipeline. A first portion of the refrigerant in the first pipeline enters the second heat exchange section through the fourth port, then flows out from the third port and into the second pipeline. A second portion of the refrigerant in the first pipeline enters the first heat exchange section through the control valve and the first port, then flows out from the second port. The first and second portions of refrigerant converge at the second port. A third portion of the refrigerant in the first pipeline enters the third heat exchange section through the control valve and the third pipeline, then flows out. The first, second, and third portions of refrigerant converge at the fourth valve port.

[0019] In some embodiments, the plurality of heat exchange sections further include a fourth heat exchange section, the two ends of which are respectively connected to the two ends of the third heat exchange section.

[0020] In some embodiments, the heat exchange tube assembly includes one or more tubes.

[0021] In some embodiments, the control valve is a one-way valve, which opens when refrigerant flows from the third port to the one-way valve, and closes when refrigerant flows from the first port to the one-way valve.

[0022] In some embodiments, the reversing valve includes a valve body and a valve core, the valve body defining a valve cavity, the valve core being movably disposed within the valve cavity between a first position and a second position, wherein when the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected; when the reversing valve is in the second state, the valve core moves to the second position, the first valve port is connected to the fifth valve port, and both the second valve port and the third valve port are connected to the fourth valve port.

[0023] In some embodiments, when the valve core is moved to the first position, the first valve port and the second valve port are connected through the valve cavity to form a first flow channel, and the fourth valve port and the fifth valve port are connected through the valve cavity to form a second flow channel, wherein the first flow channel and the second flow channel are isolated from each other; when the valve core is moved to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, and the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, wherein the third flow channel and the fourth flow channel are isolated from each other.

[0024] In some embodiments, the reversing valve is a five-way valve.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a reversing valve according to an embodiment of the present invention; Figure 2 This is a schematic diagram of an air conditioning system cooling according to an embodiment of the present invention, wherein the outdoor heat exchanger includes four heat exchange sections; Figure 3 yes Figure 2 The diagram shown illustrates the air conditioning system in heating mode. Figure 4 This is a schematic diagram of an air conditioning system cooling according to an embodiment of the present invention, wherein the outdoor heat exchanger includes two heat exchange sections; Figure 5 yes Figure 4 The diagram shown illustrates the air conditioning system in heating mode. Figure 6 This is a schematic diagram of an air conditioning system cooling according to an embodiment of the present invention, wherein the outdoor heat exchanger includes three heat exchange sections; Figure 7 yes Figure 6 The diagram shown illustrates the air conditioning system in heating mode. Figure 8 This is a schematic diagram of an air conditioning system cooling according to an embodiment of the present invention, wherein the outdoor heat exchanger includes five heat exchange sections; Figure 9 yes Figure 8 The diagram shown illustrates the air conditioning system in heating mode.

[0027] Figure label: 100. Air conditioning system; 10. Compressor; a. Exhaust port; b. Return port; 20. Reversing valve; c. First valve port; d. Second valve port; e. Third valve port; f. Fourth valve port; g. Fifth valve port; 30. Indoor heat exchanger; m, first end; n, second end; 40. Throttling element; 50. Outdoor heat exchanger; x, first interface; y, second interface; z, third interface; 51. First heat exchange section; s. First pipe opening; t. Second pipe opening; 52. Second heat exchange section; u, third port; v, fourth port; 53. Third heat exchange section; 54. Fourth heat exchange section; 61. First pipeline; 62. Second pipeline; 63. Third pipeline; 64. Fourth pipeline; 65. Fifth pipeline; 70. Check valve. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following is for reference. Figure 1 A reversing valve 20 according to an embodiment of the present invention is described.

[0030] like Figure 1 As shown, according to an embodiment of the present invention, the reversing valve 20 has a first valve port c, a second valve port d, a third valve port e, a fourth valve port f, and a fifth valve port g. The reversing valve 20 has a first state and a second state, and the reversing valve 20 is switchable between the first state and the second state. In the first state, the third valve port e is closed, the first valve port c is connected to the second valve port d, and the fourth valve port f is connected to the fifth valve port g. In the second state, the first valve port c is connected to the fifth valve port g, and the second valve port d and the third valve port e are connected to the fourth valve port f, or the second valve port d is closed and the third valve port e is connected to the fourth valve port f.

[0031] For example, the directional control valve 20 has a valve cavity. The first valve port c, second valve port d, third valve port e, fourth valve port f, and fifth valve port g of the directional control valve 20 are all connected to the valve cavity. The directional control valve 20 has a first state and a second state. When the directional control valve 20 is switched to the first state, the third valve port e is closed, the first valve port c and the second valve port d are connected through the valve cavity to form a first flow channel, and the fourth valve port f and the fifth valve port g are connected through the valve cavity to form a second flow channel. The first flow channel and the second flow channel are isolated. When the directional control valve 20 is switched to the second state, the first valve port c and the fifth valve port g are connected through the valve cavity to form a third flow channel, and the second valve port d and the third valve port e are connected through the valve cavity to form a fourth flow channel. Alternatively, when the directional control valve 20 is in the second state, the first valve port c and the fifth valve port g are connected through the valve cavity to form a third flow channel, the second valve port d is closed, and the third valve port e is connected through the valve cavity to form a fourth flow channel. The third flow channel and the fourth flow channel are isolated.

[0032] Optionally, the reversing valve 20 is a five-way reversing valve 20.

[0033] like Figures 2-9 As shown, the reversing valve 20 of this embodiment can be applied to an air conditioning system 100 to switch the refrigerant flow direction during cooling and heating, and to direct the refrigerant to different pipelines during cooling and heating. Specifically, the air conditioning system 100 may include a compressor 10, a reversing valve 20, an indoor heat exchanger 30, a throttling element 40, and an outdoor heat exchanger 50 connected in series to form a refrigerant circulation loop. The outdoor heat exchanger 50 has a first port x, a second port y, and a third port z. The first valve port c of the reversing valve 20 is connected to the exhaust port a of the compressor 10, and the fifth valve port g is connected to the return port b of the compressor 10. The second valve port d is connected to the first port x of the outdoor heat exchanger 50, the third valve port e is connected to the second port y of the outdoor heat exchanger 50, and the fourth valve port f is connected to the indoor heat exchanger 30.

[0034] Furthermore, the outdoor heat exchanger 50 includes multiple heat exchange sections. When the air conditioning system 100 is cooling, at least some of the multiple heat exchange sections are connected in series in the direction from the first interface x to the third interface z. When the air conditioning system 100 is heating, the multiple heat exchange sections are arranged in parallel in the direction from the third interface z to the reversing valve 20.

[0035] In this way, when the air conditioning system 100 is cooling, the refrigerant in the compressor 10 can enter the outdoor heat exchanger 50 from the first interface x of the outdoor heat exchanger 50 through the exhaust port a, the first valve port c, and the second valve port d. Since multiple heat exchange sections are connected in series in the direction from the first interface x to the third interface z, the refrigerant flows through the multiple heat exchange sections connected in series in the direction from the first interface x to the third interface z. Then, the refrigerant passes through the throttling element 40 and the indoor heat exchanger 30, and returns to the compressor 10 through the fifth valve port g, the fourth valve port f, and the return port b.

[0036] When the air conditioning system 100 is in heating mode, the refrigerant of the compressor 10 enters the indoor heat exchanger 30 through the exhaust port a, the first valve port c, and the fifth valve port g. Then, after being throttled by the throttling element 40, the refrigerant enters the outdoor heat exchanger 50 through the third port z. Since multiple heat exchange sections are connected in parallel in the direction from the third port z to the reversing valve 20, the refrigerant flowing in from the third port z is diverted to multiple heat exchange sections, and then flows through the second port y or the second port y and the first port x to the reversing valve 20. Finally, it returns to the compressor 10 through the fourth valve port f and the return port b.

[0037] Because the refrigerant exists in different physical states as it flows through the evaporator and condenser. In the evaporator, the refrigerant is in a low-pressure liquid and gaseous state, requiring a shorter flow path to minimize pressure loss. In the condenser, the refrigerant is in a high-pressure gaseous state, requiring a longer flow path to enhance heat exchange. When the air conditioning system is cooling, the indoor heat exchanger 30 acts as the evaporator, and the outdoor heat exchanger 50 acts as the condenser. When the air conditioning system is heating, the indoor heat exchanger 30 acts as the condenser, and the outdoor heat exchanger 50 acts as the evaporator.

[0038] Therefore, in this embodiment, by setting the reversing valve 20 to have first to fifth valve ports g, and using the second valve port d and the third valve port e to connect to the first interface x and the second interface y of the outdoor heat exchanger 50 respectively, when the air conditioning system 100 is cooling, the refrigerant can flow sequentially through the multiple heat exchange sections connected in series in the outdoor heat exchanger 50, extending the refrigerant flow path and enhancing the heat exchange effect. When the air conditioning system 100 is heating, the refrigerant can be diverted within the outdoor heat exchanger 50 to multiple heat exchange sections, shortening the refrigerant flow path and reducing the refrigerant pressure loss, thereby ensuring the heat exchange efficiency of the air conditioning system 100 during cooling and heating, and improving the energy efficiency of the air conditioning system 100.

[0039] In other words, according to the embodiment of the present invention, the reversing valve 20 can switch the refrigerant to different pipelines when the air conditioning system 100 is cooling and heating, adapting to different heat exchange requirements during cooling and heating, ensuring the heat exchange efficiency of the air conditioning system 100 during cooling and heating respectively, improving the energy efficiency of the air conditioning system 100, and the reversing valve 20 has a simple structure, being an integrated structure, which can reduce the number of parts in the air conditioning system 100 and ensure the operational stability of the air conditioning system 100.

[0040] In one embodiment of the present invention, reference is made to... Figure 1The reversing valve 20 may include a valve body and a valve core. The valve body defines a valve cavity. A first valve port c, a second valve port d, a third valve port e, a fourth valve port f, and a fifth valve port g are formed on the valve body. The first valve port c, the second valve port d, the third valve port e, the fourth valve port f, and the fifth valve port g are all in communication with the valve cavity. The valve core is disposed in the valve cavity and is movable between a first position and a second position in the valve cavity. For example, the valve core is movable between the first position and the second position.

[0041] In the first state, the valve core of the reversing valve 20 moves to the first position. At this time, the valve core blocks the third valve port e. The first valve port c and the second valve port d are connected through the valve cavity and form the first flow channel. The fourth valve port f and the fifth valve port g are connected through the valve cavity and form the second flow channel. The first flow channel and the second flow channel are isolated from each other.

[0042] When the directional control valve 20 is in the second state, the valve core moves to the second position, and the second valve port d is connected to the fourth valve port f, or the valve core blocks the second valve port d. That is, when the directional control valve 20 is switched to the second state, the first valve port c and the fifth valve port g are connected through the valve cavity to form a third flow channel, and the second valve port d and the third valve port e are connected through the valve cavity to form a fourth flow channel. Alternatively, when the directional control valve 20 is in the second state, the valve core moves to the second position, the first valve port c and the fifth valve port g are connected through the valve cavity to form a third flow channel, the second valve port d is closed, and the third valve port e is connected through the valve cavity to form a fourth flow channel to form a fourth flow channel, with the third flow channel isolated from the fourth flow channel.

[0043] Therefore, in this embodiment, the directional valve 20 can be switched between the first state and the second state by moving the valve core between the first position and the second position, which is simple in structure.

[0044] In some embodiments of the present invention, the reversing valve 20 may be a five-way valve.

[0045] The following is for reference. Figures 2-9 An air conditioning system 100 according to an embodiment of the present invention is described.

[0046] like Figure 2 As shown, the air conditioning system 100 according to an embodiment of the present invention includes: a compressor 10, a reversing valve 20, an indoor heat exchanger 30, an outdoor heat exchanger 50, and a throttling element 40, wherein the reversing valve 20 is the reversing valve 20 of the above embodiment.

[0047] Specifically, the compressor 10 has an exhaust port a and a return port b; the first valve port c of the reversing valve 20 is connected to the exhaust port a of the compressor 10, and the fourth valve port f of the reversing valve 20 is connected to the return port b of the compressor 10; the indoor heat exchanger 30 has a first end m and a second end n, and the first end m of the indoor heat exchanger 30 is connected to the fifth valve port g of the reversing valve 20.

[0048] The outdoor heat exchanger 50 has a first port x, a second port y, and a third port z. The first port x of the outdoor heat exchanger 50 is connected to the second valve port d of the reversing valve 20, and the second port y is connected to the third valve port e of the reversing valve 20. The throttling element 40 is connected between the second end n of the indoor heat exchanger 30 and the third port z of the outdoor heat exchanger 50. The outdoor heat exchanger 50 includes multiple heat exchange sections. When the air conditioning system 100 is cooling, at least two of the multiple heat exchange sections are connected in series between the first port x and the third port z. When the air conditioning system 100 is heating, the multiple heat exchange sections are connected in parallel between the reversing valve 20 and the third port z.

[0049] Thus, when the air conditioning system 100 is cooling, the high-temperature and high-pressure gaseous refrigerant is discharged from the exhaust port a of the compressor 10, passes through the first valve port c and the second valve port d of the reversing valve 20 to the first interface x of the outdoor heat exchanger 50, and enters the outdoor heat exchanger 50. In the outdoor heat exchanger 50, the refrigerant flows through multiple heat exchange sections connected in series to the third interface z of the outdoor heat exchanger 50. During this process, it condenses into a liquid state. However, it is throttled and depressurized by the throttling element 40 to become a low-pressure liquid refrigerant. Then, it enters the indoor heat exchanger 30 from the second end n of the indoor heat exchanger 30, and boils and evaporates into a gaseous refrigerant in the indoor heat exchanger 30. Then, it passes through the fifth valve port g and the fourth valve port f of the reversing valve 20, and finally returns to the compressor 10 through the return port b of the compressor 10, completing the cycle.

[0050] When the air conditioning system 100 is in heating mode, high-temperature and high-pressure gaseous refrigerant is discharged from the exhaust port a of the compressor 10, passes through the first valve port c and the fifth valve port g of the reversing valve 20, and arrives at the first end m of the indoor heat exchanger 30. After condensing into liquid refrigerant in the indoor heat exchanger 30, it is then throttled into low-pressure liquid refrigerant by the throttling element 40, and then enters the outdoor heat exchanger 50 from the third port z. Since multiple heat exchange sections are connected in parallel in the direction from the third port z to the reversing valve 20, the refrigerant flowing in from the third port z is diverted to multiple heat exchange sections, where it is vaporized into low-temperature vapor. Then, it enters the reversing valve 20 through the second valve port d or the second valve port d and the third valve port e, and finally arrives at the return port b of the compressor 10 through the fourth valve port f of the reversing valve 20, and finally returns to the compressor 10 to complete the cycle.

[0051] For the outdoor heat exchanger 50, during the cooling operation of the air conditioning system 100, the outdoor heat exchanger 50 acts as a condenser, and the refrigerant flowing inside it is high-temperature and high-pressure. To ensure its heat exchange efficiency, the refrigerant flow path needs to be extended, the heat exchange time extended, and the heating and heat exchange effect improved. However, during the heating operation of the air conditioning system 100, the outdoor heat exchanger 50 acts as an evaporator, and the refrigerant flowing inside it is in a low-pressure liquid and gaseous state. In this case, to reduce refrigerant pressure loss, the refrigerant flow path needs to be shortened.

[0052] In the existing technology, the flow path of the outdoor heat exchanger 50 of the air conditioning system 100 does not distinguish the direction. When the system is in cooling operation and heating operation, the refrigerant passes through the same pipeline. Specifically, when the system is in cooling operation, the outdoor heat exchanger 50 first splits into several heat exchange tube groups and then merges them through the subcooling pipeline to meet the cooling operation requirements. However, when the system is in heating operation, the refrigerant first passes through the subcooling pipeline and then splits into each heat exchange tube group. This will increase the system pressure loss and thus reduce the system heat exchange efficiency.

[0053] This embodiment sets up a reversing valve 20 and an outdoor heat exchanger 50, with the reversing valve 20 having a first valve port c to a fifth valve port g, and the outdoor heat exchanger 50 having a first interface x, a second interface y, and a third interface z. The second valve port d and the third valve port e are then connected to the first interface x and the second interface y of the outdoor heat exchanger 50, respectively. Thus, when the air conditioning system 100 is cooling, the refrigerant can flow sequentially through the multiple heat exchange sections connected in series in the outdoor heat exchanger 50, extending the refrigerant flow path and enhancing the heat exchange effect. When the air conditioning system 100 is heating, the refrigerant can be diverted within the outdoor heat exchanger 50 to multiple heat exchange sections, shortening the refrigerant flow path and reducing refrigerant pressure loss. This ensures the heat exchange efficiency of the air conditioning system 100 during both cooling and heating, and improves the energy efficiency of the air conditioning system 100.

[0054] In short, according to the air conditioning system 100 of the present invention, when the air conditioning system 100 is cooling and heating, the refrigerant can flow through pipelines with different pipe passes in the outdoor heat exchanger 50, thereby adapting to different heat exchange requirements during cooling and heating, ensuring the heat exchange efficiency of the air conditioning system 100 during cooling and heating respectively, improving the energy efficiency of the air conditioning system 100, and also reducing the number of parts of the air conditioning system 100, ensuring the operational stability of the air conditioning system 100.

[0055] According to some embodiments of the present invention, such as Figure 4 and Figure 5 As shown, the outdoor heat exchanger 50 includes a heat exchange tube assembly, which includes a first heat exchange section 51, a second heat exchange section 52, a first pipe 61, and a second pipe 62. The first heat exchange section 51 has a first port s and a second port t, and the second heat exchange section 52 has a third port u and a fourth port v. The first port s and the fourth port v are connected through the first pipe 61, and the second port t and the third port u are connected through the second pipe 62.

[0056] Furthermore, the air conditioning system 100 may also include: a third pipe 63, a fourth pipe 64 and a fifth pipe 65, the third pipe 63 being connected between the second valve port d and the first pipe 61, the fourth pipe 64 being connected between the third valve port e and the second pipe 62, the throttling element 40 being connected in series between the first pipe 61 and the indoor heat exchanger 30 via the fifth pipe 65, and a control valve being connected in series on the first pipe 61, the control valve being located between the third pipe 63 and the fifth pipe 65.

[0057] The outdoor heat exchanger 50 has a first interface x that can be formed on the first pipe 61. One end of the third pipe 63 is connected to the first interface x on the first pipe 61. The outdoor heat exchanger 50 has a second interface y that can be formed on the second pipe 62. One end of the fourth pipe 64 is connected to the second interface y on the second pipe 62. The outdoor heat exchanger 50 has a third interface z that can be formed on the first pipe 61. One end of the fifth pipe 65 is connected to the third interface z on the first pipe 61. A control valve is connected in series between the first interface x and the third interface z. The control valve is used to control the connection and disconnection of the first pipe 61 between the first interface x and the third interface z, thereby controlling the refrigerant flow and the direction of refrigerant flow in the first pipe 61 between the first interface x and the third interface z.

[0058] For example, Figure 4 As shown, when the air conditioning system 100 is cooling, the first valve port c of the reversing valve 20 is connected to the second valve port d, the fourth valve port f is connected to the fifth valve port g, the third valve port e is blocked, and the control valve is closed. The refrigerant flowing out from the second valve port d of the reversing valve 20 flows to the first pipe 61 through the third pipe 63. Because the control valve is closed, the refrigerant in the first pipe 61 can only enter the first heat exchange section 51 through the first pipe port s, then flow to the second pipe 62 through the second pipe port t, then enter the second heat exchange section 52 through the third pipe port u, flow to the first pipe 61 through the fourth pipe port v, and finally enter the fifth pipe 65 through the third port z. During this process, the refrigerant passes through the first heat exchange section 51 and the second heat exchange section 52 sequentially from the first port x position.

[0059] like Figure 5As shown, when the air conditioning system 100 is heating, the first valve port c of the reversing valve 20 is connected to the fifth valve port g, the third valve port e is connected to the fourth valve port f, the second valve port d is blocked, the control valve is opened, and the refrigerant flowing out from the throttling element 40 first comes to the fifth pipe 65, enters the first pipe 61 through the third interface z, and the control valve is opened, the refrigerant is divided into two paths, one path of refrigerant enters the second heat exchange section 52 through the fourth pipe port v, and after heat exchange, it flows out from the third pipe port u and comes to the second pipe 62, the other path of refrigerant enters the first heat exchange section 51 through the control valve and the first pipe port s, and after heat exchange, it flows out from the second pipe port t. The two paths of refrigerant merge at the second interface y and enter the fourth pipe 64, and finally return to the return port b of the compressor 10 through the third valve port e and the fourth valve port f.

[0060] In one specific embodiment, the control valve can be a one-way valve 70, which only allows refrigerant in the first pipe 61 located between the third pipe 63 and the fifth pipe 65 to flow unidirectionally from the fifth pipe 65 towards the third pipe 63. Therefore, the structure is simple, the cost is low, and no logic control of the reversing valve 20 is required.

[0061] According to some embodiments of the present invention, such as Figures 2-7 As shown, a heat exchanger tube assembly may consist of only one tube.

[0062] In other embodiments of the present invention, reference is made to Figure 8 and Figure 9 The heat exchanger tube assembly may also include multiple units; that is, the outdoor heat exchanger 50 may include two, three, four or more heat exchanger tubes.

[0063] like Figure 8 As shown, the outdoor heat exchanger 50 includes two heat exchange tube assemblies. Each heat exchange tube assembly includes a first heat exchange section 51, a second heat exchange section 52, a first pipe 61, a second pipe 62, and a control valve. The two heat exchange tube assemblies are designated as the first heat exchange tube assembly and the second heat exchange tube assembly, respectively. One end of a third pipe 63 is connected to the first pipe 61 between the first heat exchange section 51 of the first heat exchange tube assembly and the control valve. The first pipe 61 of the first heat exchange tube assembly and the first pipe 61 of the second heat exchange tube assembly are connected via a connecting pipe, with one end of the connecting pipe located between the second heat exchange section 52 of the first heat exchange tube assembly and the control valve, and the other end of the connecting pipe located between the first heat exchange section 51 of the second heat exchange tube assembly and the control valve. One end of a fifth pipe 65 is connected to the first pipe 61 between the second heat exchange section 52 of the second heat exchange tube assembly and the control valve. Furthermore, the second pipes 62 of both the first and second heat exchange tube assemblies are connected to one end of a fourth pipe 64.

[0064] Reference Figure 8When the air conditioning system 100 is cooling, the refrigerant flowing out from the second valve port d of the reversing valve 20 flows through the third pipe 63 to the first pipe 61 of the first heat exchange tube group, enters the first heat exchange section 51 through the first pipe port s, and after heat exchange, flows from the second pipe port t to the second pipe 62, then enters the second heat exchange section 52 through the third pipe port u, and after heat exchange, flows from the fourth pipe port v to the first pipe 61, then flows through the connecting pipe to the first pipe 61 of the second heat exchange tube group, enters the first heat exchange section 51 of the second heat exchange tube group through the first pipe port s, and after heat exchange, flows from the second pipe port t to the second pipe 62, then enters the second heat exchange section 52 of the second heat exchange tube group through the third pipe port u, and after heat exchange, flows from the fourth pipe port v to the first pipe 61, and finally enters the fifth pipe 65. During this process, the refrigerant flows out from the second valve port d, first passing through the first heat exchange section 51 and the second heat exchange section 52 of the first heat exchange tube group in sequence, then passing through the first heat exchange section 51 and the second heat exchange section 52 of the second heat exchange tube group in sequence, and then flowing to the throttling element 40.

[0065] Reference Figure 9 When the air conditioning system 100 is in heating mode, the refrigerant flowing out from the throttling element 40 passes through the fifth pipe 65 and first arrives at the first pipe 61 of the second heat exchanger assembly. In the first pipe 61 of the second heat exchanger assembly, it splits into two paths. One path of refrigerant enters the second heat exchange section 52 through the fourth port v, and after heat exchange, it flows out through the third port u and flows through the second pipe 62 to the fourth pipe 64. The other path of refrigerant, after passing through the control valve, splits into two paths again. One path enters the first heat exchange section 51 of the second heat exchanger assembly through the first port s, and after heat exchange, it flows out through the second port t and flows through the second pipe 62 to the fourth pipe 64. The other path of refrigerant flows through the connecting pipe to the first pipe 61 of the first heat exchanger assembly. In the first pipe 61 of the first heat exchanger assembly, it splits into two paths again. After heat exchange in the first heat exchange section 51 and the second heat exchange section 52 of the first heat exchanger assembly, they converge from the second port into the fourth pipe 64. Thus, when the air conditioning system 100 is heating, the refrigerant in this embodiment can be divided into four streams in the outdoor heat exchanger 50, which exchange heat through four heat exchange sections respectively, and then converge in the fourth pipe 64.

[0066] In some embodiments, such as Figure 4 and Figure 5 As shown, when the outdoor heat exchanger 50 includes only one or more heat exchange tube assemblies, and no heat exchange section is connected in series on the third pipe 63, if the air conditioning system 100 is cooling, such as Figure 4 As shown, the reversing valve 20 switches to the first state. In this state, the first valve port c is connected to the second valve port d, the third valve port e is blocked, and the fourth valve port f is connected to the fifth valve port g. If the air conditioning system is in heating mode at 100%, as... Figure 5As shown, the reversing valve 20 switches to the second state. At this time, the second valve port d is closed, that is, the second valve port d is blocked by the valve core. The first valve port c is connected to the fifth valve port g, and the third valve port e is connected to the fourth valve port f. In this way, since there is no heat exchanger connected in series on the third pipeline 63, the second valve port d is closed during the heating process, so that there is no refrigerant flowing in the third pipeline 63, and the structural arrangement is more reasonable.

[0067] In some embodiments, such as Figure 6 and Figure 7 As shown, the multiple heat exchange sections may further include a third heat exchange section 53, which is connected in series with the third pipeline 63. This increases the number of heat exchange sections in the outdoor heat exchanger 50, thereby improving heat exchange efficiency.

[0068] Specifically, when the air conditioning system is cooling at 100%, such as Figure 6 As shown, the first valve port c of the reversing valve 20 is connected to the second valve port d, the fourth valve port f is connected to the fifth valve port g, and the third valve port e is blocked, thus closing the control valve. The refrigerant flowing out from the second valve port d of the reversing valve 20 first flows through the third heat exchange section 53 on the third pipeline 63, and then flows into the first pipeline 61 of the heat exchange tube assembly. Since the control valve is closed, the refrigerant in the first pipeline 61 can only enter the first heat exchange section 51. After heat exchange, it flows through the second pipeline 62 to the second heat exchange section 52, and after heat exchange, it flows from the fourth valve port v back to the first pipeline 61, and then enters the fifth pipeline 65. During this process, along the refrigerant flow direction from the first valve port c to the throttling element 40, the refrigerant sequentially enters the third heat exchange section 53, the first heat exchange section 51, and the second heat exchange section 52 for heat exchange.

[0069] When the air conditioning system is in heating mode at 100°C, such as Figure 7 As shown, the first valve port c of the reversing valve 20 is connected to the fifth valve port g, and the second valve port d and the third valve port e are both connected to the fourth valve port f. When the control valve is open, the refrigerant flowing out from the throttling element 40 passes through the fifth pipe 65 and arrives at the first pipe 61 of the heat exchange tube assembly. In the first pipe 61, the refrigerant is divided into two paths. One path of refrigerant enters the second heat exchange section 52 through the fourth pipe port v, and after heat exchange, flows out from the third pipe port u and enters the fourth pipe 64 through the second pipe 62. The other path of refrigerant is divided into two paths after passing through the control valve. One path of refrigerant enters the second heat exchange section 52 through the fourth pipe port v, and after heat exchange, flows out through the third pipe port u and enters the fourth pipe 64 through the second pipe 62. The refrigerant enters the first heat exchange section 51 through port s, and after heat exchange, flows out through the second port t, enters the fourth pipe 64 through the second pipe 62, and the third refrigerant enters the third heat exchange section 53 through the third pipe 63. After heat exchange, it flows into the reversing valve 20 through the second valve port d. At the same time, the two refrigerants after heat exchange in the first heat exchange section 51 and the second heat exchange section 52 converge in the fourth pipe 64, and then enter the reversing valve 20 through the third valve port e. Finally, the refrigerants flowing in through the second valve port d and the third valve port e both flow to the return port b of the compressor 10 through the fourth valve port f.

[0070] In some embodiments, such as Figure 2 and Figure 3 As shown, the multiple heat exchange sections may further include a fourth heat exchange section 54, with both ends of the fourth heat exchange section 54 connected to both ends of the third heat exchange section 53. That is, the fourth heat exchange section 54 and the third heat exchange section 53 are first connected in parallel, and then connected in series on the third pipeline 63. This increases the number of heat exchange sections in the outdoor heat exchanger 50 and improves the heat exchange efficiency.

[0071] In some embodiments, when a third heat exchanger 53 is connected in series on the third pipe 63, if the air conditioning system 100 is cooling, such as Figure 2 , Figure 6 and Figure 8 As shown, the reversing valve 20 switches to the first state. In this state, the first valve port c is connected to the second valve port d, the third valve port e is blocked, and the fourth valve port f is connected to the fifth valve port g. If the air conditioning system is in heating mode at 100%, as... Figure 3 , Figure 7 and Figure 9 As shown, the reversing valve 20 switches to the second state. At this time, the first valve port c is connected to the fifth valve port g, and the second valve port d and the third valve port e are both connected to the fourth valve port f. Since the third heat exchange section 53 in this embodiment is connected in series with the third pipeline 63, when the air conditioning system 100 is heating, the refrigerant flowing through the third heat exchange section 53 needs to return to the reversing valve 20 through the third pipeline 63 and the second valve port d. In this way, the refrigerant of the third heat exchange section 53 can easily return to the reversing valve 20 through the second valve port d, and the structural arrangement is more reasonable.

[0072] The following will refer to Figures 1-3 An air conditioning system 100 according to a specific embodiment of the present invention is described.

[0073] Reference Figure 2 The air conditioning system 100 includes a compressor 10, a reversing valve 20, an indoor heat exchanger 30, an outdoor heat exchanger 50, and a throttling element 40.

[0074] Specifically, such as Figure 2 As shown, the compressor 10 has an exhaust port a and a return port b; the reversing valve 20 is a five-way valve with a first valve port c, a second valve port d, a third valve port e, a fourth valve port f, and a fifth valve port g; the indoor heat exchanger 30 has a first end m and a second end n; and the outdoor heat exchanger 50 has a first interface x, a second interface y, and a third interface z. Specifically, the first valve port c is connected to the exhaust port a, the second valve port d is connected to the first interface x, the third valve port e is connected to the second interface y, the fourth valve port f is connected to the return port b, the fifth valve port g is connected to the first end m, and the throttling element 40 is connected in series between the third interface z and the second end n.

[0075] The outdoor heat exchanger 50 includes a first heat exchange section 51, a second heat exchange section 52, a third heat exchange section 53, and a fourth heat exchange section 54. The first port s of the first heat exchange section 51 is connected to the fourth port v of the second heat exchange section 52 through a first pipe 61. The second port t of the first heat exchange section 51 is connected to the third port u of the second heat exchange section 52 through a second pipe 62. A one-way valve 70 is connected in series on the first pipe 61. The first pipe 61 is connected to the second valve port d through a third pipe 63. The two ends of the third heat exchange section 53 are respectively connected to the two ends of the fourth heat exchange section 54, and the third heat exchange section 53 and the fourth heat exchange section 54 are connected in series on the third pipe 63.

[0076] like Figure 2 As shown, when the air conditioning system 100 is cooling, the first valve port c of the reversing valve 20 is connected to the second valve port d, the fourth valve port f is connected to the fifth valve port g, and the third valve port e is blocked. High-temperature and high-pressure gaseous refrigerant is discharged from the exhaust port a of the compressor 10, and passes through the first valve port c and the second valve port d of the reversing valve 20 to the third pipeline 63. In the third pipeline 63, the refrigerant is split into two paths, which enter the third heat exchange section 53 and the fourth heat exchange section 54 respectively. After heat exchange, the refrigerant merges again in the third pipeline 63 and flows to the heat exchange tube group composed of the first heat exchange section 51 and the second heat exchange section 52. Specifically, the refrigerant in the third pipeline 63 first comes to the first pipeline 61, enters the first heat exchange section 51 from the first port s, flows to the second heat exchange section 52 through the second pipeline 62 after heat exchange, flows to the first pipeline 61 from the fourth port v after heat exchange again, and then enters the fifth pipeline 65. In this process, the refrigerant first undergoes heat exchange through the third heat exchange section 53 and the fourth heat exchange section 54 simultaneously, and then sequentially undergoes heat exchange through the first heat exchange section 51 and the second heat exchange section 52, so that the refrigerant is condensed into a liquid state in the outdoor heat exchanger 50. Then, it is throttled and depressurized by the throttling element 40 to become a low-pressure liquid refrigerant, and then enters the indoor heat exchanger 30 from the second end n of the indoor heat exchanger 30, where it boils and evaporates into a gaseous refrigerant. Then, it passes through the fifth valve port g and the fourth valve port f of the reversing valve 20, and finally returns to the compressor 10 through the return port b of the compressor 10, completing the cycle.

[0077] like Figure 3As shown, when the air conditioning system 100 is in heating mode, the first valve port c of the reversing valve 20 is connected to the fifth valve port g, and the second valve port d and the third valve port e are both connected to the fourth valve port f, thus opening the control valve. High-temperature, high-pressure gaseous refrigerant is discharged from the exhaust port a of the compressor 10, passes through the first valve port c and the fifth valve port g of the reversing valve 20, and arrives at the first end m of the indoor heat exchanger 30. After condensing into liquid refrigerant in the indoor heat exchanger 30, it is then throttled by the throttling element 40 into low-pressure liquid refrigerant. The refrigerant flowing out of the throttling element 40 passes through the fifth pipe 65 and arrives at the first pipe 61 of the heat exchange tube assembly. In the first pipe 61, the refrigerant is divided into two paths: one path enters the second heat exchange section 52 through the fourth pipe port v, and after heat exchange, flows out from the third pipe port u, then through the second pipe 62 into the fourth pipe 64; the other path, after passing through the control valve, is further divided into two paths: one path enters the first heat exchange section 51 through the first pipe port s, and after heat exchange, flows out from the second pipe port u. The refrigerant flows out of pipe t and then enters the fourth pipe 64 through the second pipe 62. After heat exchange in the first heat exchange section 51 and the second heat exchange section 52, the two refrigerant streams converge in the fourth pipe 64. The refrigerant entering the third pipe 63 is divided into two streams in the third pipe 63, which enter the third heat exchange section 53 and the second heat exchange section 52 respectively. After heat exchange, they converge again in the third pipe 63. During this process, the refrigerant vaporizes into low-temperature vapor in the first heat exchange section 51, the second heat exchange section 52, the third heat exchange section 53 and the fourth heat exchange section 54 respectively. Then, it enters the reversing valve 20 through the second valve port d and the third valve port e, and finally arrives at the return port b of the compressor 10 through the fourth valve port f of the reversing valve 20, and finally returns to the compressor 10 to complete the cycle.

[0078] According to the embodiment of the invention, the air conditioning system 100 can achieve different refrigerant flow paths in cooling and heating states, thereby improving the heat exchange efficiency of the air conditioning system 100 in cooling and heating states, thus improving the energy efficiency of the air conditioning system 100 and contributing to carbon neutrality.

[0079] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0081] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. 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.

[0083] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the exhaust port, the fourth valve port is connected to the return port, and the reversing valve is switchable between a first state and a second state. An indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; An outdoor heat exchanger and a throttling element are provided. The outdoor heat exchanger has a first interface, a second interface, and a third interface. The first interface is connected to a second valve port, the second interface is connected to the third valve port, and the throttling element is connected between the second interface and the third interface. When the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. Refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then out of the outdoor heat exchanger through the third interface. When the air conditioning system is in heating mode, the reversing valve switches to the second state, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The refrigerant is suitable to flow into the outdoor heat exchanger from the third port, and then flow out of the outdoor heat exchanger through the first port and the second port respectively. The outdoor heat exchanger includes multiple heat exchange sections. When the air conditioning system is cooling, at least some of the multiple heat exchange sections are connected in series. When the air conditioning system is heating, the multiple heat exchange sections are connected in parallel.

2. The air conditioning system according to claim 1, characterized in that, When the air conditioning system is cooling, at least some of the multiple heat exchange units are connected in series between the first interface and the third interface; when the air conditioning system is heating, the multiple heat exchange units are connected in parallel between the third interface and the fourth valve port.

3. The air conditioning system according to claim 1, characterized in that, The plurality of heat exchange units include a first heat exchange unit, a second heat exchange unit, a third heat exchange unit, and a fourth heat exchange unit; when the air conditioning system is cooling, the third heat exchange unit and the fourth heat exchange unit are connected in parallel and then connected in series with the first heat exchange unit and the second heat exchange unit; when the air conditioning system is heating, the first heat exchange unit, the second heat exchange unit, the third heat exchange unit, and the fourth heat exchange unit are connected in parallel.

4. The air conditioning system according to claim 3, characterized in that, When the air conditioning system is cooling, the third heat exchanger and the fourth heat exchanger are connected in parallel and then connected in series with the first heat exchanger and the second heat exchanger between the first interface and the third interface; when the air conditioning system is heating, the first heat exchanger and the second heat exchanger are connected in parallel between the third interface and the second interface, the third heat exchanger and the fourth heat exchanger are connected in parallel between the third interface and the first interface, and the fourth heat exchanger, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in parallel between the third interface and the fourth valve port.

5. The air conditioning system according to claim 1, characterized in that, The air conditioning system further includes a control valve, and the plurality of heat exchange units include a first heat exchange unit and a second heat exchange unit. The first heat exchange unit has a first port and a second port, and the second heat exchange unit has a third port and a fourth port. The control valve is connected between the first port and the fourth port. The first port is connected to the first interface, the fourth port is connected to the third interface, the second interface is connected to the second port and the third port, and the second port and the third port are connected. When the air conditioning system is cooling, the control valve is closed, and the first heat exchange unit and the second heat exchange unit are connected in series between the first interface and the third interface. When the air conditioning system is in heating mode, the control valve is opened, and the first heat exchange section and the second heat exchange section are connected in parallel between the third interface and the second interface.

6. The air conditioning system according to claim 1, characterized in that, The air conditioning system further includes a control valve. The plurality of heat exchange units include a first heat exchange unit, a second heat exchange unit, and a third heat exchange unit. The first heat exchange unit has a first port and a second port. The second heat exchange unit has a third port and a fourth port. The control valve is connected between the first port and the fourth port. One end of the third heat exchange unit is connected to the first port, and the other end of the third heat exchange unit is connected to the first interface. The fourth port is connected to the third interface. The second interface connects the second port and the third port. The second port and the third port are connected. When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is in heating mode, the control valve is opened, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in parallel.

7. The air conditioning system according to claim 1, characterized in that, The outdoor heat exchanger includes a heat exchange tube assembly, and the plurality of heat exchange sections include a first heat exchange section, a second heat exchange section, and a third heat exchange section. The heat exchange tube assembly includes the first heat exchange section, the second heat exchange section, a first pipeline, and a second pipeline. The first heat exchange section has a first port and a second port, and the second heat exchange section has a third port and a fourth port. The first port and the fourth port are connected through the first pipeline, and the second port and the third port are connected through the second pipeline. The first port and the third port are both formed on the first pipeline and arranged at intervals, and the second port is formed on the second pipeline. The air conditioning system further includes a third pipe, a fourth pipe, and a fifth pipe. The third pipe is connected between the second valve port and the first pipe. The third heat exchange unit is connected in series on the third pipe. The fourth pipe is connected between the third valve port and the second interface. The fifth pipe is connected between the second end and the third interface. The throttling element is connected in series on the fifth pipe. A control valve is connected in series on the first pipeline, and the control valve is connected between the first pipe port and the fourth pipe port.

8. The air conditioning system according to claim 7, characterized in that, When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is in heating mode, the control valve is opened, and the first heat exchange section, the second heat exchange section, and the third heat exchange section are connected in parallel.

9. The air conditioning system according to claim 8, characterized in that, When the air conditioning system is cooling, the control valve is closed, and the third heat exchange unit, the first heat exchange unit, and the second heat exchange unit are connected in series between the first interface and the third interface; when the air conditioning system is heating, the control valve is open, and the third heat exchange unit, the first heat exchange unit, and the second heat exchange unit are connected in parallel between the third interface and the fourth valve port.

10. The air conditioning system according to claim 7, characterized in that, When the air conditioning system is cooling, the control valve is closed, the third valve port is closed, the first valve port and the second valve port are connected, the fourth valve port and the fifth valve port are connected, and the refrigerant flowing out of the second valve port enters the third heat exchange section through the third pipeline for heat exchange, and then passes through the first pipeline, the first pipe port, the second pipe port, the second pipeline, the third pipe port, the fourth pipe port, the first pipeline, the third interface and the fifth pipeline in sequence; When the air conditioning system is in heating mode, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The control valve is open, and the refrigerant flowing out of the throttling element passes through the third interface and the first pipeline in sequence. The first part of the refrigerant in the first pipeline enters the second heat exchange section through the fourth port for heat exchange and then flows out from the third port and enters the second pipeline. The second part of the refrigerant in the first pipeline enters the first heat exchange section through the control valve and the first port for heat exchange and then flows out from the second port. The first part of the refrigerant and the second part of the refrigerant merge at the second interface. The third portion of refrigerant in the first pipeline enters the third heat exchange section through the control valve and the third pipeline, and flows out after heat exchange. The first portion of refrigerant, the second portion of refrigerant, and the third portion of refrigerant converge at the fourth valve port.

11. The air conditioning system according to claim 7, characterized in that, The plurality of heat exchange units also includes a fourth heat exchange unit, the two ends of which are respectively connected to the two ends of the third heat exchange unit.

12. The air conditioning system according to claim 7, characterized in that, The heat exchanger tube assembly includes one or more.

13. The air conditioning system according to any one of claims 5-12, characterized in that, The control valve is a one-way valve. When the refrigerant flows from the third port to the one-way valve, the one-way valve opens; when the refrigerant flows from the first port to the one-way valve, the one-way valve closes.

14. The air conditioning system according to any one of claims 1-12, characterized in that, The reversing valve includes a valve body and a valve core. The valve body defines a valve cavity. The valve core is movably disposed within the valve cavity between a first position and a second position. When the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port. The first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. When the reversing valve is in the second state, the valve core moves to the second position and the first valve port is connected to the fifth valve port. The second valve port and the third valve port are both connected to the fourth valve port.

15. The air conditioning system according to claim 14, characterized in that, The valve core moves to the first position, the first valve port and the second valve port are connected through the valve cavity and form a first flow channel, the fourth valve port and the fifth valve port are connected through the valve cavity and form a second flow channel, and the first flow channel and the second flow channel are isolated from each other; The valve core moves to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, and the third flow channel is isolated from the fourth flow channel.

16. The air conditioning system according to any one of claims 1-12, characterized in that, The reversing valve is a five-way valve.

17. An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the exhaust port, the fourth valve port is connected to the return port, and the reversing valve is switchable between a first state and a second state. An indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; An outdoor heat exchanger and a throttling element are provided. The outdoor heat exchanger has a first interface, a second interface, and a third interface. The first interface is connected to a second valve port, the second interface is connected to the third valve port, and the throttling element is connected between the second interface and the third interface. When the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. Refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then out of the outdoor heat exchanger through the third interface. When the air conditioning system is in heating mode, the reversing valve switches to the second state, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The refrigerant is suitable to flow into the outdoor heat exchanger from the third port, and then flow out of the outdoor heat exchanger through the first port and the second port respectively. The outdoor heat exchanger includes multiple heat exchange sections, including a first heat exchange section, a second heat exchange section, and a third heat exchange section; when the air conditioning system is cooling, the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series; when the air conditioning system is heating, the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in parallel.

18. The air conditioning system according to claim 17, characterized in that, When the air conditioning system is cooling, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in series between the first interface and the third interface; when the air conditioning system is heating, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in parallel between the third interface and the fourth valve port.

19. The air conditioning system according to claim 17, characterized in that, The plurality of heat exchange units also includes a fourth heat exchange unit; when the air conditioning system is cooling, the third heat exchange unit and the fourth heat exchange unit are connected in parallel and then connected in series with the first heat exchange unit and the second heat exchange unit; when the air conditioning system is heating, the first heat exchange unit, the second heat exchange unit, the third heat exchange unit and the fourth heat exchange unit are connected in parallel.

20. The air conditioning system according to claim 19, characterized in that, When the air conditioning system is cooling, the third heat exchanger and the fourth heat exchanger are connected in parallel and then connected in series with the first heat exchanger and the second heat exchanger between the first interface and the third interface; when the air conditioning system is heating, the first heat exchanger and the second heat exchanger are connected in parallel between the third interface and the second interface, the third heat exchanger and the fourth heat exchanger are connected in parallel between the third interface and the first interface, and the fourth heat exchanger, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in parallel between the third interface and the fourth valve port.

21. The air conditioning system according to claim 17, characterized in that, The air conditioning system further includes a control valve. The first heat exchange section has a first port and a second port, the second heat exchange section has a third port and a fourth port, the control valve is connected between the first port and the fourth port, one end of the third heat exchange section is connected to the first port, the other end of the third heat exchange section is connected to the first interface, the fourth port is connected to the third interface, the second interface is connected to the second port and the third port, and the second port and the third port are connected. When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is in heating mode, the control valve is opened, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in parallel.

22. The air conditioning system according to claim 17, characterized in that, The outdoor heat exchanger includes a heat exchange tube assembly, which comprises a first heat exchange section, a second heat exchange section, a first pipeline, and a second pipeline. The first heat exchange section has a first port and a second port, and the second heat exchange section has a third port and a fourth port. The first port and the fourth port are connected through the first pipeline, and the second port and the third port are connected through the second pipeline. The first port and the third port are both formed on the first pipeline and arranged at intervals, and the second port is formed on the second pipeline. The air conditioning system further includes a third pipe, a fourth pipe, and a fifth pipe. The third pipe is connected between the second valve port and the first pipe. The third heat exchange unit is connected in series on the third pipe. The fourth pipe is connected between the third valve port and the second interface. The fifth pipe is connected between the second end and the third interface. The throttling element is connected in series on the fifth pipe. A control valve is connected in series on the first pipeline, and the control valve is connected between the first pipe port and the fourth pipe port.

23. The air conditioning system according to claim 22, characterized in that, When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is in heating mode, the control valve is opened, and the first heat exchange section, the second heat exchange section, and the third heat exchange section are connected in parallel.

24. The air conditioning system according to claim 23, characterized in that, When the air conditioning system is cooling, the control valve is closed, and the third heat exchange unit, the first heat exchange unit, and the second heat exchange unit are connected in series between the first interface and the third interface; when the air conditioning system is heating, the control valve is open, and the third heat exchange unit, the first heat exchange unit, and the second heat exchange unit are connected in parallel between the third interface and the fourth valve port.

25. The air conditioning system according to claim 22, characterized in that, When the air conditioning system is cooling, the control valve is closed, the third valve port is closed, the first valve port and the second valve port are connected, the fourth valve port and the fifth valve port are connected, and the refrigerant flowing out of the second valve port enters the third heat exchange section through the third pipeline for heat exchange, and then passes through the first pipeline, the first pipe port, the second pipe port, the second pipeline, the third pipe port, the fourth pipe port, the first pipeline, the third interface and the fifth pipeline in sequence; When the air conditioning system is in heating mode, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The control valve is open, and the refrigerant flowing out of the throttling element passes through the third interface and the first pipeline in sequence. The first part of the refrigerant in the first pipeline enters the second heat exchange section through the fourth port for heat exchange and then flows out from the third port and enters the second pipeline. The second part of the refrigerant in the first pipeline enters the first heat exchange section through the control valve and the first port for heat exchange and then flows out from the second port. The first part of the refrigerant and the second part of the refrigerant merge at the second interface. The third portion of refrigerant in the first pipeline enters the third heat exchange section through the control valve and the third pipeline, and flows out after heat exchange. The first portion of refrigerant, the second portion of refrigerant, and the third portion of refrigerant converge at the fourth valve port.

26. The air conditioning system according to claim 22, characterized in that, The plurality of heat exchange units also includes a fourth heat exchange unit, the two ends of which are respectively connected to the two ends of the third heat exchange unit.

27. The air conditioning system according to claim 22, characterized in that, The heat exchanger tube assembly includes one or more.

28. The air conditioning system according to any one of claims 21-27, characterized in that, The control valve is a one-way valve. When the refrigerant flows from the third port to the one-way valve, the one-way valve opens; when the refrigerant flows from the first port to the one-way valve, the one-way valve closes.

29. The air conditioning system according to any one of claims 17-27, characterized in that, The reversing valve includes a valve body and a valve core. The valve body defines a valve cavity. The valve core is movably disposed within the valve cavity between a first position and a second position. When the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port. The first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. When the reversing valve is in the second state, the valve core moves to the second position and the first valve port is connected to the fifth valve port. The second valve port and the third valve port are both connected to the fourth valve port.

30. The air conditioning system according to claim 29, characterized in that, The valve core moves to the first position, the first valve port and the second valve port are connected through the valve cavity and form a first flow channel, the fourth valve port and the fifth valve port are connected through the valve cavity and form a second flow channel, and the first flow channel and the second flow channel are isolated from each other; The valve core moves to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, and the third flow channel is isolated from the fourth flow channel.

31. The air conditioning system according to any one of claims 17-27, characterized in that, The reversing valve is a five-way valve.

32. An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the exhaust port, the fourth valve port is connected to the return port, and the reversing valve is switchable between a first state and a second state. An indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; An outdoor heat exchanger and a throttling element are provided. The outdoor heat exchanger has a first interface, a second interface, and a third interface. The first interface is connected to a second valve port, the second interface is connected to the third valve port, and the throttling element is connected between the second interface and the third interface. When the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. Refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then out of the outdoor heat exchanger through the third interface. When the air conditioning system is in heating mode, the reversing valve switches to the second state, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The refrigerant is suitable to flow into the outdoor heat exchanger from the third port, and then flow out of the outdoor heat exchanger through the first port and the second port respectively. The outdoor heat exchanger includes multiple heat exchange sections, including a first heat exchange section, a second heat exchange section, a third heat exchange section, and a fourth heat exchange section. When the air conditioning system is cooling, the third heat exchange section and the fourth heat exchange section are connected in parallel and then connected in series with the first heat exchange section and the second heat exchange section. When the air conditioning system is heating, the first heat exchange section, the second heat exchange section, the third heat exchange section, and the fourth heat exchange section are connected in parallel.

33. The air conditioning system according to claim 32, characterized in that, When the air conditioning system is cooling, the third heat exchanger and the fourth heat exchanger are connected in parallel and then connected in series with the first heat exchanger and the second heat exchanger between the first interface and the third interface; when the air conditioning system is heating, the first heat exchanger and the second heat exchanger are connected in parallel between the third interface and the second interface, the third heat exchanger and the fourth heat exchanger are connected in parallel between the third interface and the first interface, and the fourth heat exchanger, the third heat exchanger, the first heat exchanger, and the second heat exchanger are connected in parallel between the third interface and the fourth valve port.

34. The air conditioning system according to any one of claims 32-33, characterized in that, The reversing valve includes a valve body and a valve core. The valve body defines a valve cavity. The valve core is movably disposed within the valve cavity between a first position and a second position. When the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port. The first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. When the reversing valve is in the second state, the valve core moves to the second position and the first valve port is connected to the fifth valve port. The second valve port and the third valve port are both connected to the fourth valve port.

35. The air conditioning system according to claim 34, characterized in that, The valve core moves to the first position, the first valve port and the second valve port are connected through the valve cavity and form a first flow channel, the fourth valve port and the fifth valve port are connected through the valve cavity and form a second flow channel, and the first flow channel and the second flow channel are isolated from each other; The valve core moves to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, and the third flow channel is isolated from the fourth flow channel.

36. The air conditioning system according to any one of claims 32-33, characterized in that, The reversing valve is a five-way valve.

37. An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the exhaust port, the fourth valve port is connected to the return port, and the reversing valve is switchable between a first state and a second state. An indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; An outdoor heat exchanger and a throttling element are provided. The outdoor heat exchanger has a first interface, a second interface, and a third interface. The first interface is connected to a second valve port, the second interface is connected to the third valve port, and the throttling element is connected between the second interface and the third interface. When the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. Refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then out of the outdoor heat exchanger through the third interface. When the air conditioning system is in heating mode, the reversing valve switches to the second state, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The refrigerant is suitable to flow into the outdoor heat exchanger from the third port, and then flow out of the outdoor heat exchanger through the first port and the second port respectively. The outdoor heat exchanger includes multiple heat exchange sections, and the air conditioning system also includes a control valve. The multiple heat exchange sections include a first heat exchange section and a second heat exchange section. The first heat exchange section has a first port and a second port, and the second heat exchange section has a third port and a fourth port. The control valve is connected between the first port and the fourth port. The first port is connected to the first interface, and the fourth port is connected to the third interface. The second interface connects the second port and the third port, and the second port and the third port are connected. When the air conditioning system is cooling, the control valve is closed, and the first heat exchange unit and the second heat exchange unit are connected in series between the first interface and the third interface. When the air conditioning system is in heating mode, the control valve is opened, and the first heat exchange section and the second heat exchange section are connected in parallel between the third interface and the second interface.

38. The air conditioning system according to claim 37, characterized in that, The control valve is a one-way valve. When the refrigerant flows from the third port to the one-way valve, the one-way valve opens; when the refrigerant flows from the first port to the one-way valve, the one-way valve closes.

39. The air conditioning system according to any one of claims 37-38, characterized in that, The reversing valve includes a valve body and a valve core. The valve body defines a valve cavity. The valve core is movably disposed within the valve cavity between a first position and a second position. When the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port. The first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. When the reversing valve is in the second state, the valve core moves to the second position and the first valve port is connected to the fifth valve port. The second valve port and the third valve port are both connected to the fourth valve port.

40. The air conditioning system according to claim 39, characterized in that, The valve core moves to the first position, the first valve port and the second valve port are connected through the valve cavity and form a first flow channel, the fourth valve port and the fifth valve port are connected through the valve cavity and form a second flow channel, and the first flow channel and the second flow channel are isolated from each other; The valve core moves to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, and the third flow channel is isolated from the fourth flow channel.

41. The air conditioning system according to any one of claims 37-38, characterized in that, The reversing valve is a five-way valve.

42. An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the exhaust port, the fourth valve port is connected to the return port, and the reversing valve is switchable between a first state and a second state. An indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; An outdoor heat exchanger and a throttling element are provided. The outdoor heat exchanger has a first interface, a second interface, and a third interface. The first interface is connected to a second valve port, the second interface is connected to the third valve port, and the throttling element is connected between the second interface and the third interface. When the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. Refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then out of the outdoor heat exchanger through the third interface. When the air conditioning system is in heating mode, the reversing valve switches to the second state, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The refrigerant is suitable to flow into the outdoor heat exchanger from the third port, and then flow out of the outdoor heat exchanger through the first port and the second port respectively. The outdoor heat exchanger includes multiple heat exchange sections, and the air conditioning system further includes a control valve. The multiple heat exchange sections include a first heat exchange section, a second heat exchange section, and a third heat exchange section. The first heat exchange section has a first port and a second port. The second heat exchange section has a third port and a fourth port. The control valve is connected between the first port and the fourth port. One end of the third heat exchange section is connected to the first port, and the other end of the third heat exchange section is connected to the first interface. The fourth port is connected to the third interface. The second interface connects the second port and the third port. The second port and the third port are connected. When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is in heating mode, the control valve is opened, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in parallel.

43. The air conditioning system according to claim 42, characterized in that, The reversing valve includes a valve body and a valve core. The valve body defines a valve cavity. The valve core is movably disposed within the valve cavity between a first position and a second position. When the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port. The first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. When the reversing valve is in the second state, the valve core moves to the second position and the first valve port is connected to the fifth valve port. The second valve port and the third valve port are both connected to the fourth valve port.

44. The air conditioning system according to claim 43, characterized in that, The valve core moves to the first position, the first valve port and the second valve port are connected through the valve cavity and form a first flow channel, the fourth valve port and the fifth valve port are connected through the valve cavity and form a second flow channel, and the first flow channel and the second flow channel are isolated from each other; The valve core moves to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, and the third flow channel is isolated from the fourth flow channel.

45. The air conditioning system according to any one of claims 42-44, characterized in that, The reversing valve is a five-way valve.

46. ​​An air conditioning system, characterized in that, include: The compressor has an exhaust port and an exhaust port; A reversing valve having a first valve port, a second valve port, a third valve port, a fourth valve port, and a fifth valve port, wherein the first valve port is connected to the exhaust port, the fourth valve port is connected to the return port, and the reversing valve is switchable between a first state and a second state. An indoor heat exchanger having a first end and a second end, the first end being connected to the fifth valve port; An outdoor heat exchanger and a throttling element are provided. The outdoor heat exchanger has a first interface, a second interface, and a third interface. The first interface is connected to a second valve port, the second interface is connected to the third valve port, and the throttling element is connected between the second interface and the third interface. When the air conditioning system is cooling, the reversing valve switches to the first state, the third valve port is closed, the first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. Refrigerant is suitable to flow into the outdoor heat exchanger from the first interface and then out of the outdoor heat exchanger through the third interface. When the air conditioning system is in heating mode, the reversing valve switches to the second state, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The refrigerant is suitable to flow into the outdoor heat exchanger from the third port, and then flow out of the outdoor heat exchanger through the first port and the second port respectively. The outdoor heat exchanger includes multiple heat exchange sections, each comprising a heat exchange tube assembly. The multiple heat exchange sections include a first heat exchange section, a second heat exchange section, and a third heat exchange section. The heat exchange tube assembly includes the first heat exchange section, the second heat exchange section, a first pipe, and a second pipe. The first heat exchange section has a first port and a second port; the second heat exchange section has a third port and a fourth port. The first port and the fourth port are connected via the first pipe; the second port and the third port are connected via the second pipe. The first port and the third port are both formed on the first pipe and arranged at intervals; the second port is formed on the second pipe. The air conditioning system further includes a third pipe, a fourth pipe, and a fifth pipe. The third pipe is connected between the second valve port and the first pipe. The third heat exchange unit is connected in series on the third pipe. The fourth pipe is connected between the third valve port and the second interface. The fifth pipe is connected between the second end and the third interface. The throttling element is connected in series on the fifth pipe. A control valve is connected in series on the first pipeline, and the control valve is connected between the first pipe port and the fourth pipe port.

47. The air conditioning system according to claim 46, characterized in that, When the air conditioning system is cooling, the control valve is closed, and the third heat exchange section, the first heat exchange section, and the second heat exchange section are connected in series. When the air conditioning system is in heating mode, the control valve is opened, and the first heat exchange section, the second heat exchange section, and the third heat exchange section are connected in parallel.

48. The air conditioning system according to claim 47, characterized in that, When the air conditioning system is cooling, the control valve is closed, and the third heat exchange unit, the first heat exchange unit, and the second heat exchange unit are connected in series between the first interface and the third interface; when the air conditioning system is heating, the control valve is open, and the third heat exchange unit, the first heat exchange unit, and the second heat exchange unit are connected in parallel between the third interface and the fourth valve port.

49. The air conditioning system according to claim 46, characterized in that, When the air conditioning system is cooling, the control valve is closed, the third valve port is closed, the first valve port and the second valve port are connected, the fourth valve port and the fifth valve port are connected, and the refrigerant flowing out of the second valve port enters the third heat exchange section through the third pipeline for heat exchange, and then passes through the first pipeline, the first pipe port, the second pipe port, the second pipeline, the third pipe port, the fourth pipe port, the first pipeline, the third interface and the fifth pipeline in sequence; When the air conditioning system is in heating mode, the first valve port is connected to the fifth valve port, and the second valve port and the third valve port are both connected to the fourth valve port. The control valve is open, and the refrigerant flowing out of the throttling element passes through the third interface and the first pipeline in sequence. The first part of the refrigerant in the first pipeline enters the second heat exchange section through the fourth port for heat exchange and then flows out from the third port and enters the second pipeline. The second part of the refrigerant in the first pipeline enters the first heat exchange section through the control valve and the first port for heat exchange and then flows out from the second port. The first part of the refrigerant and the second part of the refrigerant merge at the second interface. The third portion of refrigerant in the first pipeline enters the third heat exchange section through the control valve and the third pipeline, and flows out after heat exchange. The first portion of refrigerant, the second portion of refrigerant, and the third portion of refrigerant converge at the fourth valve port.

50. The air conditioning system according to claim 46, characterized in that, The plurality of heat exchange units also includes a fourth heat exchange unit, the two ends of which are respectively connected to the two ends of the third heat exchange unit.

51. The air conditioning system according to claim 46, characterized in that, The heat exchanger tube assembly includes one or more.

52. The air conditioning system according to any one of claims 46-51, characterized in that, The control valve is a one-way valve. When the refrigerant flows from the third port to the one-way valve, the one-way valve opens; when the refrigerant flows from the first port to the one-way valve, the one-way valve closes.

53. The air conditioning system according to any one of claims 46-51, characterized in that, The reversing valve includes a valve body and a valve core. The valve body defines a valve cavity. The valve core is movably disposed within the valve cavity between a first position and a second position. When the reversing valve is in the first state, the valve core moves to the first position and blocks the third valve port. The first valve port and the second valve port are connected, and the fourth valve port and the fifth valve port are connected. When the reversing valve is in the second state, the valve core moves to the second position and the first valve port is connected to the fifth valve port. The second valve port and the third valve port are both connected to the fourth valve port.

54. The air conditioning system according to claim 53, characterized in that, The valve core moves to the first position, the first valve port and the second valve port are connected through the valve cavity and form a first flow channel, the fourth valve port and the fifth valve port are connected through the valve cavity and form a second flow channel, and the first flow channel and the second flow channel are isolated from each other; The valve core moves to the second position, the first valve port and the fifth valve port are connected through the valve cavity to form a third flow channel, the second valve port, the third valve port and the fourth valve port are connected through the valve cavity to form a fourth flow channel, and the third flow channel is isolated from the fourth flow channel.

55. The air conditioning system according to any one of claims 46-51, characterized in that, The reversing valve is a five-way valve.

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