Air conditioner

Abstract

The utility model discloses a kind of air conditioners. According to the air conditioner of the utility model includes: compressor, outdoor unit and indoor unit, outdoor unit is provided with at least one outdoor heat exchanger, outdoor heat exchanger is provided with outdoor heat exchanger first mouth and outdoor heat exchanger second mouth, outdoor heat exchanger first mouth is selectively communicated with exhaust port or suction port;Indoor unit is provided with at least two indoor heat exchangers, multiple indoor heat exchangers are communicated with each other, one on multiple indoor heat exchangers is provided with indoor unit first interface, another on multiple indoor heat exchangers is provided with indoor unit second interface, two indoor heat exchangers are communicated with each other and adjacent and are provided with indoor unit third interface between;Wherein, first interface is selectively communicated with one in exhaust port and suction port, second interface is selectively communicated with another in exhaust port and suction port, third interface is communicated with outdoor heat exchanger second mouth, and air conditioner can be high in efficiency.

Description

Technical Field

[0001] This utility model relates to the field of air conditioners, and in particular to an air conditioner. Background Technology

[0002] As people's living standards improve and technology advances, users' demands for air conditioners have expanded beyond basic cooling and heating; they now require greater comfort. Currently, high-comfort air conditioners primarily use three-pipe systems. In addition to cooling and heating, these systems can dehumidify and reheat, controlling temperature and humidity to some extent and addressing some of the needs for constant temperature dehumidification or heating-and-dehumidification in low-temperature, high-humidity environments. However, while existing three-pipe systems can control temperature and humidity, they lack decoupled temperature and humidity control. They cannot simultaneously dehumidify, cool, and then reheat, resulting in poor energy efficiency and insufficient comfort. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of this utility model is to provide an air conditioner. According to this utility model, the air conditioner achieves different functions such as cooling, heating, and dehumidification / reheating, as well as decoupled control of temperature and humidity, by selectively connecting the first port, first interface, and second interface of the outdoor heat exchanger to either the air intake or exhaust port, thereby improving the energy efficiency and comfort of the air conditioner.

[0004] The air conditioner according to this utility model includes: a compressor, an outdoor unit, and an indoor unit. The compressor has an exhaust port and an intake port. The outdoor unit is provided with at least one outdoor heat exchanger, which has a first outdoor heat exchanger port and a second outdoor heat exchanger port. The first outdoor heat exchanger port can be selectively connected to either the exhaust port or the intake port. The indoor unit is provided with at least two indoor heat exchangers and at least two first throttling devices. Each indoor heat exchanger is connected in series with a corresponding first throttling device. Multiple indoor heat exchangers are connected to each other through their respective series-connected first throttling devices. One of the multiple indoor heat exchangers is provided with a first indoor unit interface, and another of the multiple indoor heat exchangers is provided with a second indoor unit interface. A third indoor unit interface is provided between two adjacent indoor heat exchangers that are connected to each other. The first interface can be selectively connected to either the exhaust port or the intake port, the second interface can be selectively connected to the other of the exhaust port or the intake port, and the third interface is connected to the second outdoor heat exchanger port.

[0005] The air conditioner according to this utility model is provided with an outdoor unit and an indoor unit. The outdoor unit is provided with at least one outdoor heat exchanger and an outdoor heat exchanger first port and an outdoor heat exchanger second port connected to the outdoor heat exchanger. The indoor unit is provided with at least two indoor heat exchangers and is provided with a first port, a second port and a third port connected to the indoor heat exchangers. The first port, the first port and the second port of the outdoor heat exchanger can be selectively connected to an air intake or an exhaust port, respectively, and the third port is connected to the second port of the outdoor heat exchanger. Through the selective connection relationship between the first port, the first port and the second port of the outdoor heat exchanger and the air intake or exhaust port, the air conditioner realizes different functions such as cooling, heating and dehumidification and reheating. When the air conditioner is performing dehumidification and reheating, the at least two indoor heat exchangers in the indoor unit can perform dehumidification and heating respectively, realizing decoupled control of temperature and humidity of the air conditioner and improving the energy saving and comfort of the air conditioner.

[0006] According to one embodiment of the present invention, the outdoor unit is provided with multiple outdoor heat exchangers and multiple second throttling devices. Each outdoor heat exchanger is connected in series with a corresponding second throttling device. Each outdoor heat exchanger is provided with an outdoor heat exchanger first port and an outdoor heat exchanger second port. Each outdoor heat exchanger first port can be selectively connected to the air intake port or the air exhaust port.

[0007] According to one embodiment of the present invention, the second port of each outdoor heat exchanger is connected to each other and to the third port through their respective series-connected second throttling devices.

[0008] According to one embodiment of the present invention, the air conditioner is provided with a rotating defrost mode. In the rotating defrost mode, at least one of the plurality of outdoor heat exchangers connects the first port of the outdoor heat exchanger to the air intake port, and at least another of the plurality of outdoor heat exchangers connects the first port of the outdoor heat exchanger to the exhaust port.

[0009] According to one embodiment of the present invention, a plurality of indoor heat exchangers are arranged sequentially in the direction of airflow. The indoor heat exchanger located on the upstream side is provided with the first interface of the indoor unit, and the indoor heat exchanger located on the downstream side is provided with the second interface of the indoor unit. The air conditioner is provided with a dehumidification and reheat mode. In the dehumidification and reheat mode, the first interface is connected to the air intake, and the second interface is connected to the exhaust port.

[0010] According to one embodiment of the present invention, the indoor unit is configured as multiple units connected in parallel.

[0011] According to one embodiment of the present invention, the plurality of indoor units include a first indoor unit and a second indoor unit; wherein, the air conditioner is provided with a heat recovery mode, in which an indoor heat exchanger in the first indoor unit is connected to the exhaust port and in parallel with the outdoor heat exchanger, and an indoor heat exchanger in the first indoor unit and the outdoor heat exchanger are respectively connected to an indoor heat exchanger in the second indoor unit; and an indoor heat exchanger in the second indoor unit is connected to the air intake port.

[0012] According to one embodiment of the present invention, the air conditioner further includes: a control valve, the control valve being provided with a D interface, an E2 interface, an S2 interface, a C2 interface, a C1 interface, an S1 interface, and an E1 interface; the D interface is connected to the exhaust port, the E2 interface is connected to the second interface of a plurality of indoor units, the S1 interface is connected to the intake port, the S2 interface is connected to the intake port, the C2 interface is connected to the first port of one of the outdoor heat exchangers, the C1 interface is connected to the second port of another of the outdoor heat exchangers, and the E1 interface is connected to the first interface of a plurality of indoor units; wherein at least two of the E2 interface, the S2 interface, the C2 interface, the C interface, the S interface, and the E interface are connected to the D interface.

[0013] According to one embodiment of the present invention, the air conditioner further includes a solenoid valve, one end of which is connected between the S-interface and the air intake, and the other end of which is connected between the S-interface and the air intake.

[0014] According to one embodiment of the present invention, the control valve has at least three valve positions, and when the control valve is in multiple valve positions, the ratio of the number of interconnected interfaces is 3:2:2.

[0015] According to one embodiment of the present invention, the control valve includes a valve body and a valve cavity formed within the valve body. A valve core is movably disposed within the valve cavity, and the valve core divides the valve cavity into a first channel, a second channel, and a third channel. The first channel connects to the three interfaces, and the second channel and the third channel each connect to two interfaces.

[0016] According to one embodiment of the present invention, there are two valve cores, and the two valve cores and the valve body respectively form the second channel and the third channel.

[0017] According to one embodiment of the present invention, the control valve has at least three valve positions, and when the control valve is in multiple valve positions, the ratio of the number of interconnected interfaces is 3:4.

[0018] According to one embodiment of the present invention, the control valve includes a valve body and a valve cavity formed within the valve body. The valve core is movably disposed within the valve cavity, and the valve core divides the valve cavity into a first flow path and a second flow path. The first flow path connects to three of the interfaces, and the second flow path connects to four of the interfaces.

[0019] According to one embodiment of the present invention, the compressor has multiple air intake ports, and multiple indoor heat exchangers in the indoor unit can be selectively connected to the corresponding air intake ports.

[0020] According to one embodiment of the present invention, the compressor has multiple air intake ports, and the outdoor unit is equipped with multiple outdoor heat exchangers, each of which can be selectively connected to the corresponding air intake port.

[0021] According to one embodiment of the present invention, the air conditioner further includes: a first heat exchange branch and a plate heat exchanger, wherein the first heat exchange branch connects the second port of the outdoor heat exchanger to the air intake port and / or the air supply enthalpy-increasing port of the compressor, and a branch throttling device is provided on the first heat exchange branch; the plate heat exchanger is provided with a first flow channel and a second flow channel that can selectively exchange heat with each other, the first flow channel is located between the third interface and the second port of the outdoor heat exchanger, one end of the first heat exchange branch is connected between the first flow channel and the second port of the outdoor heat exchanger, and the second flow channel is connected to the first heat exchange branch and located between the branch throttling device and the air intake port and / or the air supply enthalpy-increasing port of the compressor.

[0022] According to one embodiment of the present invention, the air conditioner further includes: a second heat exchange branch, one end of the second heat exchange branch being connected to the second interface, and the other end of the second heat exchange branch being connected between the branch throttling device and the second flow channel, wherein the second heat exchange branch can be selectively connected to or disconnected from the second flow channel.

[0023] In summary, the air conditioner consists of a compressor, an indoor unit, an outdoor unit, and a control valve. The control valve has interfaces D, E2, S2, C2, C1, S1, and E1. The indoor unit has interfaces 1, 2, and 3, and the outdoor unit has interfaces 1 and 2 for the outdoor heat exchanger. Interface D connects to the exhaust port; interface E2 connects to the second interfaces of multiple indoor units; interface S1 connects to the intake port; interface S2 connects to the intake port; interface C2 connects to the first interface of one outdoor heat exchanger; interface C1 connects to the second interface of another outdoor heat exchanger; and interface E1 connects to the first interfaces of multiple indoor units. Inside the control valve, at least two of interfaces E2, S2, C2, C1, S1, and E1 are connected to interface D. The air conditioner can achieve different functions through the connections of the interfaces within the control valve. Meanwhile, the air conditioner is equipped with multiple air intakes. Multiple indoor heat exchangers in the indoor unit can be selectively connected to their corresponding air intakes, and each outdoor heat exchanger in the outdoor unit can also be selectively connected to its corresponding air intake. This achieves a cascaded heat exchange function, reducing heat loss and improving the air conditioner's energy efficiency. Furthermore, the air conditioner includes a plate heat exchanger and a first and second heat exchange branch. The plate heat exchanger has a first and second flow channel that can selectively exchange heat with each other. The first heat exchange branch connects the second inlet of the outdoor heat exchanger to the air intake or the enthalpy-increasing inlet and is equipped with a branch throttling device. The second heat exchange branch is located between the second inlet and the second flow channel and can be selectively connected to the second flow channel. The arrangement of the first and second heat exchange branches and the plate heat exchanger further improves the air conditioner's energy efficiency. The air conditioner achieves different functions such as cooling, heating, and dehumidification and reheating by selectively connecting the first port, first interface, and second interface of the outdoor heat exchanger to either the air intake or exhaust port. When the air conditioner is performing dehumidification and reheating, at least two indoor heat exchangers in the indoor unit can perform dehumidification and heating respectively, realizing decoupled control of temperature and humidity of the air conditioner and improving the energy efficiency and comfort of the air conditioner.

[0024] Additional aspects and advantages of this 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

[0025] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of an air conditioner system according to an embodiment of the present invention; Figure 2This is a schematic diagram of the cooling mode of an air conditioner according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the heating mode of an air conditioner according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the dehumidification and reheat mode of an air conditioner according to an embodiment of the present invention; Figure 5 This is a schematic diagram of an air conditioner in a defrosting mode according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the second alternating defrosting mode of an air conditioner according to an embodiment of the present utility model; Figure 7 This is a schematic diagram of an air conditioner heat recovery mode according to an embodiment of the present invention.

[0026] Figure label: Air conditioner 1; Compressor 11, intake port 111, exhaust port 112, gas replenishment and enthalpy increase port 113; Indoor unit 12, first indoor unit 1201, second indoor unit 1202, indoor heat exchanger 121, first interface 122, second interface 123, third interface 124; Outdoor unit 13, outdoor heat exchanger 131, outdoor heat exchanger first port 132, outdoor heat exchanger second port 133; Control valve 14; First heat exchange branch 151, branch throttling device 1511, plate heat exchanger 152, first flow channel 1521, second flow channel 1522, second heat exchange branch 153. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] While existing three-pipe air conditioners can control temperature and humidity, they do not achieve decoupled control of temperature and humidity. They cannot simultaneously dehumidify and cool down before heating up again, resulting in poor energy efficiency and insufficient comfort.

[0029] The following is for reference. Figures 1-7 This invention describes an air conditioner according to an embodiment of the present invention.

[0030] The air conditioner 1 according to this utility model includes: a compressor 11, an outdoor unit 13, and an indoor unit 12. The compressor 11 has an exhaust port 112 and an intake port 111. The outdoor unit 13 is provided with at least one outdoor heat exchanger 131, which has an outdoor heat exchanger first port 132 and an outdoor heat exchanger second port 133. The outdoor heat exchanger first port 132 can be selectively connected to either the exhaust port 112 or the intake port 111. The indoor unit 12 is provided with at least two indoor heat exchangers 121 and at least two first throttling devices. Each indoor heat exchanger 121 is connected in series with a corresponding first throttling device. Multiple indoor heat exchangers 121... Each of the multiple indoor heat exchangers 121 is connected to the others via a first throttling device connected in series. One of the multiple indoor heat exchangers 121 is provided with a first interface 122 of the indoor unit 12, and another of the multiple indoor heat exchangers 121 is provided with a second interface 123 of the indoor unit 12. A third interface 124 of the indoor unit 12 is provided between two adjacent indoor heat exchangers 121 that are connected to each other. The first interface 122 can be selectively connected to one of the exhaust port 112 and the intake port 111, the second interface 123 can be selectively connected to the other of the exhaust port 112 and the intake port 111, and the third interface 124 is connected to the second port 133 of the outdoor heat exchanger.

[0031] The air conditioner 1 according to this utility model includes a compressor 11, an outdoor unit 13, and an indoor unit 12. The compressor 11 has an exhaust port 112 and an intake port 111. The outdoor unit 13 has at least one outdoor heat exchanger 131, which has a first outdoor heat exchanger port 132 and a second outdoor heat exchanger port 133. The first outdoor heat exchanger port 132 can be connected to either the exhaust port 112 or the intake port 111. By changing the connection relationship between the first outdoor heat exchanger port 131 and the intake port 111 or the exhaust port 112, different functions of the air conditioner 1 can be achieved. The indoor unit 12 has at least two indoor heat exchangers 121 and at least two first throttling devices. The first throttling device can be an expansion valve. Each indoor heat exchanger 121 is connected in series with a corresponding first throttling device. The device can control the refrigerant flow through the indoor heat exchanger 121; multiple indoor heat exchangers 121 are interconnected, and one of the multiple indoor heat exchangers 121 is provided with a first interface 122 of the indoor unit 12, while the other is provided with a second interface 123 of the indoor unit 12. The first interface 122 and the second interface 123 can be connected to the air intake 111 or the exhaust 112, respectively. Different choices can adapt to different modes of the air conditioner 1; a third interface 124 of the indoor unit 12 is provided between two interconnected and adjacent indoor heat exchangers 121. The third interface 124 is connected to the second port 133 of the outdoor heat exchanger, realizing the connection between the outdoor unit 13 and the indoor unit 12, ensuring that the refrigerant can flow between the indoor heat exchanger 121 and the outdoor heat exchanger 131, thereby ensuring that the air conditioner 1 can operate normally.

[0032] When the air conditioner 1 is in cooling mode, the first port 132 of the outdoor heat exchanger can be connected to the exhaust port 112, and the first port 122 and the second port 123 of the indoor unit 12 can be connected to the suction port 111 respectively. The refrigerant, under the action of the compressor 11, forms a high-temperature, high-pressure refrigerant. This high-temperature, high-pressure refrigerant enters the outdoor unit 13 through the first port 132 of the outdoor heat exchanger and can condense in the outdoor heat exchanger 131 to transform into a medium-temperature refrigerant. The medium-temperature refrigerant flows to the third port 124 and... The refrigerant is split at 124 points and flows to different indoor units 12. The medium-temperature refrigerant entering the indoor unit 12 can evaporate and absorb heat at the indoor heat exchanger 121, thereby achieving the cooling of the room by the air conditioner 1. The refrigerant after cooling the room can flow to the air intake 111 through the first interface 122 and the second interface 123 and be recycled. In the cooling mode, at least two indoor heat exchangers 121 in the indoor unit 12 can achieve the cooling function of the air conditioner 1, which improves the cooling efficiency of the air conditioner 1.

[0033] When the air conditioner 1 is turned on in heating mode, the first port 132 of the outdoor heat exchanger can be connected to the air intake 111, and the first port 122 and the second port 123 of the indoor unit 12 can be connected to the exhaust port 112 respectively. The refrigerant is formed into high temperature and high pressure refrigerant under the action of the compressor 11. The high temperature and high pressure refrigerant can enter the indoor unit 12 through the first port 122 and the second port 123. The refrigerant entering the indoor unit 12 condenses and releases heat at the indoor heat exchanger 121, realizing the heating of the indoor unit by the air conditioner 1. The condensed refrigerant can converge at the third port 124 and flow into the outdoor unit 13 through the second port 133 of the outdoor heat exchanger. The refrigerant entering the outdoor unit 13 can evaporate at the outdoor heat exchanger 131 to form low temperature refrigerant, and then flow to the air intake 111 through the first port 132 of the outdoor heat exchanger for recycling. In heating mode, at least two indoor heat exchangers 121 in the indoor unit 12 can realize the heating function of the air conditioner 1, which improves the heating efficiency of the air conditioner 1.

[0034] In addition, the air conditioner 1 also has a dehumidification and reheat mode. When the air conditioner 1 is in dehumidification and reheat mode, the first port 132 of the outdoor heat exchanger can be connected to the exhaust port 112, the second port 123 of the indoor unit 12 can be connected to the exhaust port 112, and the first port 122 of the indoor unit 12 can be connected to the suction port 111. At this time, the high-temperature and high-pressure refrigerant flowing out of the compressor 11 can be divided. Part of it enters the outdoor unit 13 through the first port 132 of the outdoor heat exchanger and is converted into medium-temperature refrigerant in the outdoor heat exchanger 131. The medium-temperature refrigerant flows from the second port 133 of the outdoor heat exchanger to the indoor unit 12. The other part of the high-temperature and high-pressure refrigerant can enter one of the indoor heat exchangers 121 through the second port 123 of the indoor unit 12 and condense and release heat. Then it merges with the refrigerant flowing out of the second port 133 of the outdoor heat exchanger and flows to the indoor unit 12. Another indoor heat exchanger 121 of the indoor unit 12 evaporates and absorbs heat in the indoor heat exchanger 121. Then, the refrigerant can flow back to the compressor 11 through the first interface 122 for circulation. During this process, the indoor air will first come into contact with the other indoor heat exchanger 121 of the indoor unit 12 (i.e., the indoor heat exchanger 121 that realizes the evaporation and heat absorption of the refrigerant). At this time, the moisture in the air can form condensate, realizing the dehumidification function of the air conditioner 1. After dehumidification, the air comes into contact with one of the indoor heat exchangers 121 of the indoor unit 12 (i.e., the indoor heat exchanger 121 that realizes the condensation and heat release of the refrigerant). At this time, the dehumidified air can form hot air under the influence of the heat released by the evaporation of the refrigerant, thereby realizing the heating function of the air conditioner 1. Through the two indoor heat exchangers 121 with different working states, the dehumidification and reheating function of the air conditioner 1 is realized.

[0035] The air conditioner 1 according to this utility model is provided with an outdoor unit 13 and an indoor unit 12. The outdoor unit 13 is provided with at least one outdoor heat exchanger 131 and an outdoor heat exchanger first port 132 and an outdoor heat exchanger second port 133 connected to the outdoor heat exchanger 131. The indoor unit 12 is provided with at least two indoor heat exchangers 121 and at least two first throttling devices. Each indoor heat exchanger 121 is connected in series with a corresponding first throttling device. It is also provided with a first interface 122, a second interface 123, and a third interface 124 connected to the indoor heat exchangers 121. The outdoor heat exchanger first port 132, the first interface 123, and the third interface 124 are connected to the indoor heat exchangers 121. The second interface 123 can be selectively connected to the air intake 111 or the exhaust 112, and the third interface 124 is connected to the second port 133 of the outdoor heat exchanger. The air conditioner 1 realizes different functions such as cooling, heating and dehumidification and reheating through the selective connection relationship between the first port 132 of the outdoor heat exchanger, the first interface 122 and the second interface 123 and the air intake 111 or the exhaust 112, and the air conditioner 1 performs dehumidification and reheating. When the air conditioner 1 performs dehumidification and reheating, at least two indoor heat exchangers 121 in the indoor unit 12 can perform dehumidification and heating respectively, realizing the decoupled control of temperature and humidity of the air conditioner 1 and improving the energy saving and comfort of the air conditioner 1.

[0036] According to one embodiment of this utility model, the outdoor unit 13 at the exhaust port 112 is equipped with multiple outdoor heat exchangers 131 and multiple second throttling devices. Each outdoor heat exchanger 131 is connected in series with a corresponding second throttling device. Each outdoor heat exchanger 131 is equipped with a first outdoor heat exchanger port 132 and a second outdoor heat exchanger port 133. The first outdoor heat exchanger port 132 of each exhaust port 112 can be selectively connected to either the air intake port 111 or the exhaust port 112. The air conditioner 1 is equipped with multiple outdoor heat exchangers 131, which increases the heat exchange efficiency between the entire air conditioner 1 system and the external environment. Under the same operating conditions, heat exchange can be achieved more efficiently. Whether it is discharging indoor heat to the outside during cooling or absorbing heat from the outside and transferring it to the inside during heating, the heat transfer speed can be accelerated, the heat exchange efficiency improved, and thus the cooling and heating effects of the air conditioner 1 enhanced. Furthermore, each outdoor heat exchanger 131 is connected in series with a corresponding second throttling device (which can be an expansion valve). This second throttling device can precisely adjust the refrigerant flow into each outdoor heat exchanger 131 according to different outdoor ambient temperatures and indoor load requirements, thereby optimizing the operation of the entire air conditioning system 1. For example, under partial load conditions, the refrigerant flow to some outdoor heat exchangers 131 can be reduced, lowering system energy consumption; while under high load conditions, it ensures that all outdoor heat exchangers 131 can fully utilize their heat exchange capacity.

[0037] Each outdoor heat exchanger 131's first outdoor heat exchanger port 132 can be selectively connected to either the air intake port 111 or the outlet port. This means that the number of outdoor heat exchangers 131 and their connection methods can be flexibly adjusted according to different operating conditions and environmental conditions. For example, when the ambient temperature is high or low and the air conditioner 1 needs to operate at high load, the number of outdoor heat exchangers 131 participating in heat exchange can be increased to enhance the system's cooling or heating capacity. When the ambient temperature is more suitable and the air conditioner 1 operates at low load, the number of outdoor heat exchangers 131 participating in heat exchange can be reduced to lower system energy consumption and achieve more precise and efficient operation control. In special modes, multiple outdoor heat exchangers 131 can also perform different heat exchange functions. For example, the first outdoor heat exchanger port 132 of one outdoor heat exchanger 131 can be connected to the exhaust port 112, while the first outdoor heat exchanger port 132 of another outdoor heat exchanger 131 can be connected to the air intake port 111, so that the two outdoor heat exchangers 131 have different functions to achieve more complex functions of the air conditioner 1.

[0038] According to one embodiment of this utility model, the second port 133 of each outdoor heat exchanger 131 is interconnected with each other through their respective series-connected second throttling devices and connected to the third port 124. The interconnection of the second ports 133 of multiple outdoor heat exchangers 131 achieves a confluence function, enabling the multiple outdoor heat exchangers 131 to form a unified whole, working collaboratively to complete heat exchange tasks. The second throttling devices can precisely control the refrigerant flow into each outdoor heat exchanger 131, improving refrigerant utilization. Under different operating conditions and different ambient temperatures, each outdoor heat exchanger 131 can work together according to system requirements, further enhancing the system's heat exchange performance and ensuring that the air conditioner 1 maintains good operating performance in various complex environments. Moreover, the air conditioner 1 connects the second ports of each outdoor heat exchanger 131 to each other. Compared with the method of connecting each outdoor heat exchanger 131 to the indoor unit 12 separately, the number and complexity of the pipes are reduced. This not only reduces the difficulty and cost of pipe laying, but also reduces the number of connection points in the pipes, thereby reducing the risk of refrigerant leakage and improving the reliability and sealing of the system.

[0039] According to one embodiment of the present invention, the air conditioner 1 is provided with a rotating defrosting mode. In the rotating defrosting mode, at least one of the plurality of outdoor heat exchangers 131 connects the first port 132 of the outdoor heat exchanger to the air intake port 111, and at least another of the plurality of outdoor heat exchangers 131 connects the first port 132 of the outdoor heat exchanger to the exhaust port 112.

[0040] In traditional air conditioner defrosting processes, frost buildup on the outdoor heat exchanger 131 severely impacts its heat exchange efficiency. Typically, heating operation needs to be stopped, and the outdoor heat exchanger 131 is used as an evaporator, utilizing the high-temperature, high-pressure gaseous refrigerant discharged from the compressor 11 to melt the frost layer. This leads to a drop in indoor temperature, affecting user comfort. The air conditioner 1 of this invention allows multiple outdoor heat exchangers 131 to work collaboratively. One group of outdoor heat exchangers connects its first port 132 to the air intake 111 for defrosting, while another group connects its first port 132 to the exhaust 112 to continue participating in the heating cycle. Thus, during defrosting, the air conditioner 1 does not need to completely stop heating, continuously supplying heat to the room while efficiently defrosting the outdoor heat exchangers 131 that require defrosting, significantly shortening defrosting time and improving defrosting efficiency. By rotating different outdoor heat exchangers 131 for defrosting, it can be ensured that each outdoor heat exchanger 131 can be fully defrosted, avoiding the problem of continuous decline in heat exchange performance due to some outdoor heat exchangers 131 not being effectively defrosted for a long time. This allows the performance of each outdoor heat exchanger 131 to remain relatively balanced, thereby improving the overall heating effect and operational stability of the air conditioner 1.

[0041] In some embodiments, the air conditioner 1 has a rotating defrosting mode one, such as... Figure 5 As shown, the outdoor unit 13 can be equipped with two outdoor heat exchangers 131. The first port 132 of the outdoor heat exchanger of one outdoor heat exchanger 131 can be connected to the air intake 111. At the same time, the first port 132 of the outdoor heat exchanger of the other outdoor heat exchanger 131 can be connected to the exhaust port 112. The second port 123 of the indoor unit 12 is connected to the exhaust port 112, and the third port 124 of the indoor unit 12 is connected to the second port 133 of the outdoor heat exchanger of the other outdoor heat exchanger 131. After the flow is combined, it is connected to the second port 133 of the outdoor heat exchanger of one of the outdoor heat exchangers 131. When the air conditioner 1 is working, the high-temperature and high-pressure refrigerant flowing out of the exhaust port 112 can be divided. One part directly enters another outdoor heat exchanger 131 through the first port 132 of the outdoor heat exchanger to condense and release heat to defrost the outdoor heat exchanger 131. The other part can enter the indoor heat exchanger 121 through the second port 123 of the indoor unit 12. After condensing and releasing heat, it is converted into medium-temperature refrigerant and merges with the refrigerant that condenses and releases heat in the other outdoor heat exchanger 131. Then it enters one of the outdoor heat exchangers 131 to evaporate and absorb heat. After that, it returns to the compressor 11 through the suction port 111 to participate in the next cycle. During this process, the air conditioner 1 does not need to completely stop heating and can continuously deliver heat to the room. At the same time, it can efficiently defrost the outdoor heat exchanger 131 that needs to be defrosted, which greatly shortens the defrosting time and improves the defrosting efficiency.

[0042] In some embodiments, the air conditioner 1 has a second alternating defrost mode, such as... Figure 6As shown, the outdoor unit 13 can be equipped with two outdoor heat exchangers 131. The first port 132 of one outdoor heat exchanger 131 can be connected to the exhaust port 112. At the same time, the first port 132 of the other outdoor heat exchanger 131 can be connected to the intake port 111. The first interface 122 of the indoor unit 12 is connected to the exhaust port 112, and the third interface 124 of the indoor unit 12 is connected to the second port 133 of one of the outdoor heat exchangers 131. After the flow is combined, it is connected to the second port 133 of the other outdoor heat exchanger 131. When the air conditioner 1 is working, the high-temperature and high-pressure refrigerant flowing out of the exhaust port 112 can be divided. One part directly enters one of the outdoor heat exchangers 131 through the first port 132 of the outdoor heat exchanger to condense and release heat to defrost the outdoor heat exchanger 131. The other part can enter the indoor heat exchanger 121 through the first port 122 of the indoor unit 12. After condensing and releasing heat, it is converted into medium-temperature refrigerant and merges with the refrigerant that condenses and releases heat in one of the outdoor heat exchangers 131. Then it enters another outdoor heat exchanger 131 to evaporate and absorb heat. After that, it returns to the compressor 11 through the suction port 111 to participate in the next cycle. During this process, the air conditioner 1 does not need to completely stop heating and can continuously deliver heat to the room. At the same time, it can efficiently defrost the outdoor heat exchanger 131 that needs to be defrosted, which greatly shortens the defrosting time and improves the defrosting efficiency.

[0043] According to one embodiment of the present invention, a plurality of indoor heat exchangers 121 are arranged sequentially in the direction of airflow. The indoor heat exchanger 121 located on the upstream side is provided with a first interface 122 of the indoor unit 12, and the indoor heat exchanger 121 located on the downstream side is provided with a second interface 123 of the indoor unit 12. The air conditioner 1 is provided with a dehumidification and reheat mode. In the dehumidification and reheat mode, the first interface 122 is connected to the air intake 111, and the second interface 123 is connected to the exhaust 112.

[0044] In dehumidification and reheat mode, the first interface 122 is connected to the air intake 111, and the second interface 123 is connected to the exhaust 112. The indoor heat exchanger 121 located on the upstream side (with the first interface 122) contains a low-temperature refrigerant. When the humid indoor air first flows through the upstream indoor heat exchanger 121, the water vapor in the air will quickly condense into liquid water, achieving a highly efficient dehumidification process. The indoor heat exchanger 121 located on the downstream side (with the second interface 123) contains a high-temperature refrigerant. When the indoor air flows through the downstream indoor heat exchanger 121, the air will be heated and its temperature will rise, realizing the heating function of the air conditioner 1. The operation of the upstream indoor heat exchanger 121 and the downstream indoor heat exchanger 121 does not interfere with each other and works together to realize the dehumidification and reheat function of the air conditioner 1. It also realizes the decoupled control of temperature and humidity of the air conditioner 1. The air conditioner 1 has good energy efficiency and high comfort.

[0045] According to one embodiment of this utility model, multiple indoor units 12 are configured to be connected in parallel. The coordinated operation of these multiple parallel indoor units 12 effectively increases the heat exchange area and air handling capacity of the entire air conditioning system. In cooling mode, more indoor units 12 can simultaneously absorb heat from the indoor air, rapidly reducing the indoor temperature; in heating mode, they can release more heat into the room, raising the indoor temperature. This synergistic effect significantly enhances the overall cooling and heating capacity of the air conditioner 1, meeting the needs of larger spaces or locations with higher temperature and humidity requirements. Furthermore, the multiple parallel indoor units 12 can be distributed across different areas, providing more comprehensive coverage of the indoor space and avoiding uneven local temperatures. For example, in large shopping malls, office buildings, hotels, and other similar locations, by rationally arranging multiple indoor units 12, uniform temperature and humidity control can be ensured in every corner, providing users with a more comfortable environment.

[0046] According to one embodiment of the present invention, a plurality of indoor units 12 include a first indoor unit 1201 and a second indoor unit 1202; wherein, the air conditioner 1 is provided with a heat recovery mode, in which an indoor heat exchanger 121 in the first indoor unit 1201 is connected to an exhaust port 112 and connected in parallel with an outdoor heat exchanger 131, and an indoor heat exchanger 121 in the first indoor unit 1201 and an outdoor heat exchanger 131 are respectively connected to an indoor heat exchanger 121 in the second indoor unit 1202; an indoor heat exchanger 121 in the second indoor unit 1202 is connected to an air intake port 111.

[0047] In heat recovery mode, such as Figure 7 As shown, an indoor heat exchanger 121 in the first indoor unit 1201 is connected to the exhaust port 112 and is connected in parallel with the outdoor heat exchanger 131. This allows a portion of the high-temperature, high-pressure gaseous refrigerant discharged by the compressor 11 to flow to the indoor heat exchanger 121 in the first indoor unit 1201. At this time, the indoor heat exchanger 121 can act as a condenser, releasing the heat in the refrigerant into the indoor space. Simultaneously, the indoor heat exchanger 121 and the outdoor heat exchanger 131 in the first indoor unit 1201 are respectively connected to an indoor heat exchanger 121 in the second indoor unit 1202. The refrigerant in the first indoor unit 1201 and the refrigerant in the outdoor heat exchanger 131 merge and enter the indoor heat exchanger 121 in the second indoor unit 1202 to evaporate and absorb heat. The indoor heat exchanger 121 in the second indoor unit 1202 is also connected to the air intake port 111, forming a heat transfer loop. In this way, the system can recover heat that might otherwise be lost to the environment through the outdoor heat exchanger 131 and reuse it in the relevant processing of the indoor unit 12, reducing energy waste and significantly improving the energy efficiency of the air conditioning system.

[0048] According to one embodiment of the present invention, the air conditioner 1 further includes: a control valve 14, the control valve 14 being provided with a D interface, an E2 interface, an S2 interface, a C2 interface, a C1 interface, an S1 interface, and an E1 interface; the D interface is connected to the exhaust port 112, the E2 interface is connected to the second interface 123 of a plurality of indoor units 12, the S1 interface is connected to the intake port 111, the S2 interface is connected to the intake port 111, the C2 interface is connected to the first port 132 of one of the outdoor heat exchangers 131, the C1 interface is connected to the second port 133 of another outdoor heat exchanger 131, and the E1 interface is connected to the first interface 122 of a plurality of indoor units 12; wherein at least two of the E2 interface, S2 interface, C2 interface, C1 interface, S1 interface, and E1 interface are connected to the D interface.

[0049] The control valve 14 has multiple interfaces and is connected to the compressor 11, indoor unit 12, and outdoor heat exchanger 131, allowing the refrigerant to have multiple flow paths. For example, by controlling the connection between different interfaces and interface D (connected to exhaust port 112), the refrigerant can flow from exhaust port 112 to different interfaces of indoor unit 12 and outdoor heat exchanger 131, forming a multi-path and selectable flow mode. This allows the air conditioning system to flexibly adjust the direction and flow rate of the refrigerant according to different operating modes and conditions, meeting diverse usage needs. In different operating modes of the air conditioner 1, such as cooling mode, heating mode, dehumidification mode or heat recovery mode, the system has different requirements for the flow and distribution of refrigerant. The control valve 14 can easily switch between these modes. For example, in cooling mode, the refrigerant can be controlled to mainly flow to the outdoor heat exchanger 131 for heat dissipation, and then reasonably distributed to the indoor unit 12 for cooling. In heating mode, the refrigerant flow can be changed so that it first releases heat in the indoor unit 12 and then flows to the outdoor heat exchanger 131 to absorb heat.

[0050] The control valve 14 is connected through a flexible control interface, enabling the system to efficiently adapt to various operating modes, improving the versatility and adaptability of the air conditioner 1 system. It can also reduce unnecessary pipe connections, achieve multi-functionality of one valve, simplify system components, optimize structural space, reduce manufacturing processes, improve efficiency, and reduce costs.

[0051] According to one embodiment of this utility model, the air conditioner also includes a solenoid valve. One end of the solenoid valve is connected between the S2 interface and the air intake 111, and the other end is connected between the S1 interface and the air intake 111. The solenoid valve allows for more precise control of the refrigerant flow path in the system. When the air conditioner 1 is in different operating modes, the solenoid valve can open or close according to control commands, thereby flexibly changing the refrigerant flow direction. For example, under certain special operating conditions, if it is necessary to adjust the refrigerant distribution ratio between the indoor unit 12 and the outdoor heat exchanger 131, the solenoid valve can respond promptly, opening or closing the corresponding channels to achieve precise adjustment of the refrigerant flow, ensuring that the air conditioner 1 can operate stably and efficiently in various complex environments, thus improving the overall performance and reliability of the system. At the same time, the addition of the solenoid valve also enhances the flexibility and controllability of the air conditioner system, enabling the system to better adapt to the needs and usage scenarios of different users.

[0052] According to one embodiment of the present invention, the control valve 14 has at least three valve positions. When the control valve 14 is in multiple valve positions, the ratio of the number of interconnected interfaces is 3:2:2. When the control valve 14 is in different valve positions, connecting the corresponding interfaces according to the 3:2:2 ratio ensures that the refrigerant flows between the compressor 11, the indoor unit 12, and the outdoor heat exchanger 131 with appropriate flow rate and path under different operating modes. For example, in heating mode, interface D is connected to interfaces E1 and E2, interface C1 is connected to interface S1, and interface C2 is connected to interface S2. At this time, the ratio of the number of interconnected interfaces is 3:2:2. The refrigerant flowing out of exhaust port 112 can enter the indoor heat exchanger 121 through the first interface 122 and the second interface 123 of the control valve 14 through interfaces E1 and E2 respectively, and heat the room. Then it flows to the outdoor heat exchanger 131 through the third interface 124 for heat exchange. After heat exchange in the outdoor heat exchanger 131, the refrigerant flows back to the intake port 111 through interfaces S1 and S2 on the control valve 14 to participate in the next cycle, which improves the indoor heating effect.

[0053] According to one embodiment of this utility model, the control valve 14 includes a valve body and a valve cavity formed within the valve body. A valve core is movably disposed within the valve cavity, dividing the valve cavity into a first channel, a second channel, and a third channel. The first channel connects to three interfaces, while the second and third channels each connect to two interfaces. The movement of the valve core within the valve cavity can change the interfaces connected to each channel, thereby achieving flexible control of the refrigerant flow direction and flow rate. When the valve core is in different positions, the first, second, and third channels are connected to different interfaces, forming multiple combinations of refrigerant flow paths.

[0054] For example, in heating mode, the movement of the valve core connects the first channel to interfaces D, E1, and E2; the second channel to interfaces C1 and S1; and the third channel to interfaces C2 and S2. This enables refrigerant flow in heating mode, allowing the refrigerant to circulate efficiently within the system, ensuring stable operation of the air conditioner 1 and achieving good heating performance. By changing the connection between channels and interfaces through the movement of the valve core under different operating mode requirements, the refrigerant flow pattern can be quickly switched to meet the requirements of various modes such as cooling, dehumidification, and heat recovery, greatly improving the performance and adaptability of the air conditioner 1. Furthermore, the design of the control valve 14, which changes the interfaces connected to each channel through the movement of the valve core within the valve cavity, makes the overall structure of the control valve 14 more compact. It achieves precise control of the refrigerant flow direction within a limited space, which is beneficial for the overall miniaturization and high-efficiency design of the air conditioner.

[0055] According to one embodiment of this utility model, there are two valve cores, which together with the valve body form a second channel and a third channel, respectively. The two valve cores move independently, allowing for flexible adjustment of the interfaces connected to the second and third channels. When the air conditioner 1 is in different operating modes, the two valve cores can change their positions according to preset control logic, thereby altering the connection status of the second and third channels with their respective interfaces. For example, in cooling mode, one valve core moves to connect the interface of the second channel to the outdoor heat exchanger 131 and the interface related to the air intake 111, while the other valve core moves to maintain a suitable connection in the third channel. This ensures that the refrigerant primarily flows to the outdoor heat exchanger 131 for heat dissipation, and is then rationally distributed to the indoor unit 12 for cooling, achieving an efficient cooling cycle.

[0056] According to one embodiment of this utility model, the control valve 14 has at least three valve positions. When the control valve 14 is in multiple valve positions, the ratio of the number of interconnected interfaces is 3:4. For example, when the air conditioner 1 is in a certain special operating condition, the D interface can act as the refrigerant output source and connect with three related interfaces to distribute the refrigerant to different paths; while the other four interfaces are connected according to system requirements to achieve reasonable flow of refrigerant between different components. With the ratio of the number of interconnected interfaces all set at 3:4, the air conditioner 1 can exhibit better performance in different operating conditions. For example, during the transitional season, when the temperature difference between indoors and outdoors is small, the air conditioner 1 needs to cool to a certain extent to remove the residual heat indoors, but also needs to avoid excessive cooling that could cause discomfort. At this time, the control valve 14 precisely adjusts the flow of refrigerant to the indoor unit 12 and the outdoor heat exchanger 131 through the 3:4 interface ratio, so that the indoor unit 12 can cool in a relatively gentle way, while the outdoor heat exchanger 131 can also dissipate heat reasonably, maintain the stable operation of the system, and improve the adaptability and operating efficiency of the air conditioner 1 under complex operating conditions.

[0057] According to one embodiment of this utility model, the control valve 14 includes a valve body and a valve cavity formed within the valve body. A valve core is movably disposed within the valve cavity, dividing the valve cavity into a first flow path and a second flow path. The first flow path connects to three interfaces, and the second flow path connects to four interfaces. The movement of the valve core within the valve cavity can precisely adjust the interfaces connected to the first and second flow paths, thereby achieving fine control over the refrigerant flow direction and flow rate. When the valve core is in different positions, the first and second flow paths are connected to different interfaces, forming a variety of complex and precise combinations of refrigerant flow paths. Under different operating scenario requirements, by changing the connection relationship between the flow path and the interface through the movement of the valve core, the refrigerant flow mode can be quickly and accurately switched to meet the requirements of various complex operating modes. Whether in laboratory environments with extremely high temperature and humidity control requirements, or in large conference rooms with dense crowds and frequent temperature and humidity changes, the air conditioner 1 can be ensured to operate stably and achieve good temperature and humidity regulation effects, improving the performance and adaptability of the air conditioner 1.

[0058] Furthermore, the design of the control valve, which alters the interfaces connecting various flow paths through the movement of the valve core within the valve chamber, makes the overall structure of the control valve more compact and rational. High-precision control of refrigerant flow direction and flow rate is achieved within a limited space, which is beneficial for the overall miniaturization and efficiency of the air conditioner, while also reducing manufacturing costs and enhancing the product's market competitiveness.

[0059] According to one embodiment of this utility model, the compressor 11 has multiple suction ports 111, and multiple indoor heat exchangers 121 in the indoor unit 12 can be selectively connected to corresponding suction ports 111. Since the compressor 11 has multiple inlets, and the multiple indoor heat exchangers 121 in the indoor unit 12 can be selectively connected to corresponding suction ports 111, the refrigerant circulation path becomes more flexible and diverse. Under different operating conditions, such as cooling or heating modes, and under different load demands, the air conditioner 1 system can select the most suitable refrigerant circulation path according to the actual situation. Furthermore, different indoor heat exchangers 121 in the same indoor unit 12 can select different suction ports 111. For example, in cooling mode, the upstream indoor heat exchanger 121 can be connected to one of the suction ports 111, and the downstream indoor heat exchanger 121 can be connected to another suction port 111, realizing the cascade heat exchange function of the air conditioner 1, reducing heat exchange losses, and improving the cooling efficiency of the air conditioner 1.

[0060] According to one embodiment of this utility model, the compressor 11 has multiple suction ports 111, and the outdoor unit 13 is provided with multiple outdoor heat exchangers 131, each of which can be selectively connected to a corresponding suction port 111. Since the compressor 11 has multiple inlets and the outdoor unit 13 is equipped with multiple outdoor heat exchangers 131, and each outdoor heat exchanger 131 can be selectively connected to a corresponding suction port 111, this makes the refrigerant circulation path more flexible and diverse. Under different operating conditions, such as cooling or heating modes, and under different load demands, the air conditioner 1 system can select the most suitable refrigerant circulation path according to the actual situation. For example, in heating mode, the first outdoor heat exchanger port 132 of one outdoor heat exchanger 131 can be connected to one of the suction ports 111, and the first outdoor heat exchanger port 132 of another outdoor heat exchanger 131 can be connected to another suction port 111, realizing the cascade heat exchange function of the air conditioner 1, reducing heat exchange losses, and improving the heating efficiency of the air conditioner 1.

[0061] According to one embodiment of the present invention, the air conditioner 1 further includes: a first heat exchange branch 151 and a plate heat exchanger 152. The first heat exchange branch 151 connects the second port 133 of the outdoor heat exchanger with the air intake 111 or the air replenishment enthalpy port 113 of the compressor 11. A branch throttling device 1511 is provided on the first heat exchange branch 151. The plate heat exchanger 152 is provided with a first flow channel 1521 and a second flow channel 1522 that can exchange heat with each other. The first flow channel 1521 is located between the third interface 124 and the second port 133 of the outdoor heat exchanger. One end of the first heat exchange branch 151 is connected between the first flow channel 1521 and the second port (133) of the outdoor heat exchanger. The second flow channel 1522 is connected to the first heat exchange branch 151 and is located between the branch throttling device 1511 and the air intake (111) and / or the air replenishment enthalpy port 113 of the compressor 11.

[0062] The first heat exchange branch 151 connects the second port 133 of the outdoor heat exchanger to the suction port 111 or the enthalpy-increasing injection port 113, and is equipped with a branch throttling device 1511. Under low-temperature heating conditions, the throttling effect of the branch throttling device 1511 reduces the pressure and further lowers the temperature of the refrigerant flowing from the second port 133 of the outdoor heat exchanger to the plate heat exchanger 152. If this portion of low-temperature refrigerant enters the enthalpy-increasing injection port 113, it can reduce the exhaust temperature of the compressor 11, improve the isentropic efficiency of the compressor 11, and reduce energy loss during compression. At the same time, the enthalpy-increasing injection increases the refrigerant circulation volume, improves the system's heating capacity, and enables the system to operate efficiently in low-temperature environments, thereby improving overall energy efficiency.

[0063] The first flow channel 1521 of the plate heat exchanger 152 is located between the third interface 124 and the second port 133 of the outdoor heat exchanger. One end of the first heat exchange branch 151 is connected between the first flow channel 1521 and the second port 133 of the outdoor heat exchanger. The second flow channel 1522 is connected to the first heat exchange branch 151 and is located between the branch throttling device 1511 and the suction port 111 and / or the gas injection and enthalpy-increasing port 113 of the compressor 11, so that refrigerants of different temperatures can exchange heat in the plate heat exchanger 152. For example, in cooling mode, the refrigerant flowing out of the second port 133 of the outdoor heat exchanger (in the first flow channel 1521) can transfer some heat to the low-temperature refrigerant (in the second flow channel 1522) in the first heat exchange branch 151 after being throttled by the branch throttling device 1511, further reducing the temperature of the refrigerant entering the indoor unit 12 and improving the cooling efficiency of the refrigerant in the indoor unit 12.

[0064] According to one embodiment of the present invention, the air conditioner 1 further includes a second heat exchange branch 153, one end of which is connected to the second interface 123, and the other end of which is connected to the branch throttling device 1511 and either connected to or disconnected from the second flow channel 1522. The second heat exchange branch 153 can guide a portion of the refrigerant flowing out of the second interface 123 into the second flow channel 1522 to exchange heat with the refrigerant in the first flow channel 1521, further improving the cooling or heating efficiency of the air conditioner 1. During this process, the branch throttling device 1511 can control the refrigerant flow rate, thereby improving refrigerant efficiency. For example, in cooling mode, the refrigerant after passing through the indoor heat exchanger 121 flows out from the second port 123. At this time, a portion of the refrigerant can flow into the second flow channel 1522 through the second heat exchange branch 153, while the refrigerant formed after passing through the outdoor heat exchanger 131 enters the first flow channel 1521 through the second port 133 of the outdoor heat exchanger. At this time, the refrigerant in the second flow channel 1522 can absorb some of the heat of the refrigerant in the first flow channel 1521, further reducing the temperature of the refrigerant entering the indoor heat exchanger 121, thereby improving the cooling effect of the air conditioner 1 and achieving a wider range of temperature regulation.

[0065] In some embodiments, the connection relationships of the various interfaces of the control valve 14 are related to the mode of the air conditioner 1, and the specific connection relationships are as follows: When the air conditioner 1 is in cooling mode, the D interface is connected to the C1 and C2 interfaces. The refrigerant flowing out of the exhaust port 112 can enter the outdoor heat exchanger 131 through the C1 and C2 interfaces of the control valve 14, and then enter the indoor heat exchanger 121 through the third interface 124 to cool the room. After passing through the indoor heat exchanger 121, it returns to the suction port 111 through the control valve 14 to participate in the next cycle.

[0066] When the air conditioner 1 is in heating mode, the D interface is connected to the E1 and E2 interfaces. The refrigerant flowing out of the exhaust port 112 can enter the indoor heat exchanger 121 through the first interface 122 and the second interface 123 of the control valve 14 through the E1 and E2 interfaces respectively, and heat the room. Then it flows to the outdoor heat exchanger 131 through the third interface 124 for heat exchange. After heat exchange in the outdoor heat exchanger 131, the refrigerant flows back to the intake port 111 through the S1 and S2 interfaces on the control valve 14 to participate in the next cycle.

[0067] When the air conditioner 1 is in dehumidification and reheat mode, the D interface is connected to the C1 and E2 interfaces. The refrigerant flowing out of the exhaust port 112 can be diverted through the control valve 14. Part of the refrigerant enters an outdoor heat exchanger 131 through the C1 interface (at this time, the other outdoor heat exchanger 131 can be not working), and the other part of the refrigerant flows through the E2 interface to the second interface 123 and enters the downstream indoor heat exchanger 121. The refrigerant that has passed through the downstream indoor heat exchanger 121 and the refrigerant that has passed through the outdoor heat exchanger 131 merge and enter the upstream indoor heat exchanger 121. Then, it flows back to the suction port 111 through the first interface 122 to participate in the next cycle.

[0068] When air conditioner 1 is in the alternating defrosting mode 1, interface D is connected to interface C1 and interface E2. The refrigerant flowing out of exhaust port 112 can be diverted through control valve 14. Part of the refrigerant enters another outdoor heat exchanger 131 through interface C1 and defrosts that outdoor heat exchanger 131; the other part of the refrigerant flows through interface E2 to the second interface 123 and enters the downstream indoor heat exchanger 121 (at this time, the upstream indoor heat exchanger 121 can be not working). The refrigerant that has passed through the downstream indoor heat exchanger 121 flows out through the second interface 123 and merges with the defrosted refrigerant of another outdoor heat exchanger 131, flowing together into one of the outdoor heat exchangers 131, and then flows back to the intake port 111 through interface C2 and interface S2 to participate in the next cycle.

[0069] When air conditioner 1 is in the second defrosting mode, interface D is connected to interface C2 and interface E1. The refrigerant flowing out of exhaust port 112 can be diverted through control valve 14. Part of the refrigerant enters one of the outdoor heat exchangers 131 through interface C2 and defrosts that outdoor heat exchanger 131; the other part of the refrigerant flows through interface E1 to the first interface 122 and enters the upstream indoor heat exchanger 121 (at this time, the downstream indoor heat exchanger 121 can be not working). The refrigerant that has passed through the upstream indoor heat exchanger 121 flows out through the second interface 123 and merges with the defrosted refrigerant of one of the outdoor heat exchangers 131, and flows together into another outdoor heat exchanger 131. Then it flows back to the intake port 111 through interface C1 and interface S1 to participate in the next cycle.

[0070] When the air conditioner 1 is in heat recovery mode, the D port is connected to the E1 and C2 ports. The refrigerant flowing out of the exhaust port 112 can be diverted through the control valve 14. Part of the refrigerant enters one of the outdoor heat exchangers 131 through the C2 port for heat exchange (at this time, the other outdoor heat exchanger 131 can be inactive), and then flows to the second port 123. The other part of the refrigerant flows through the E1 port to the first port 122 and enters the indoor heat exchanger 121 on the upstream side of an indoor unit 12 (at this time, the indoor heat exchanger 121 on the downstream side of the indoor unit 12 can be inactive). Then, the refrigerant merges with the refrigerant flowing out of the outdoor heat exchanger 131 through the second port 123. After merging, it enters the indoor heat exchanger 121 on the downstream side of another indoor unit 12 (at this time, the indoor heat exchanger 121 on the upstream side of the indoor unit 12 can be inactive). Then, it flows through the first port 122 to the control valve 14, and then flows back to the intake port 111 through the E2 and S2 ports to participate in the next cycle.

[0071] In summary, the air conditioner 1 includes a compressor 11, an indoor unit 12, an outdoor unit 13, and a control valve 14. The control valve 14 has interfaces D, E2, S2, C2, C1, S1, and E1. The indoor unit 12 has a first interface 122, a second interface 123, and a third interface 124. The outdoor unit 13 has a first outdoor heat exchanger port 132 and a second outdoor heat exchanger port 133. Interface D is connected to the exhaust port 112, interface E2 is connected to the second interfaces 123 of multiple indoor units 12, and interface S1 is connected to the intake port 112. The control valve 14 connects to the following ports: S2 is connected to the intake port 111; C2 is connected to the first port 132 of one of the outdoor heat exchangers 131; C1 is connected to the second port 133 of another outdoor heat exchanger 131; and E1 is connected to the first port 122 of multiple indoor units 12. Inside the control valve 14, at least two of the ports E2, S2, C2, C1, S1, and E1 are connected to the D port. The air conditioner 1 can achieve different functions through the connection relationships of the ports within the control valve 14. Simultaneously, the air conditioner 1 is also equipped with multiple intake ports 111. Multiple indoor heat exchangers 121 in the indoor units 12 can be selectively connected to their corresponding intake ports 111, and each outdoor heat exchanger 131 in the outdoor units 13 can also be selectively connected to its corresponding intake port 111. This achieves a cascaded heat exchange function for the air conditioner 1, reducing heat loss and improving its energy efficiency. In addition, the air conditioner 1 is also equipped with a plate heat exchanger 152, a first heat exchange branch 151, and a second heat exchange branch 153. The plate heat exchanger 152 has a first flow channel 1521 and a second flow channel 1522 that can selectively exchange heat with each other. The first heat exchange branch 151 connects the second port 133 of the outdoor heat exchanger with the air intake port 111 or the air replenishment enthalpy increase port 113, and is equipped with a branch throttling device 1511. The second heat exchange branch 153 is located between the second port 123 and the second flow channel 1522, and the second heat exchange branch 153 can be selectively connected to the second flow channel 1522. The arrangement of the first heat exchange branch 151, the second heat exchange branch 153, and the plate heat exchanger 152 can further improve the energy efficiency of the air conditioner 1. The air conditioner 1 achieves different functions such as cooling, heating, and dehumidification and reheating by selectively connecting the first port 132, the first interface 122 and the second interface 123 of the outdoor heat exchanger to the air intake port 111 or the exhaust port 112. When the air conditioner 1 is performing dehumidification and reheating, at least two indoor heat exchangers 121 in the indoor unit 12 can perform dehumidification and heating respectively, realizing the decoupled control of temperature and humidity of the air conditioner 1 and improving the energy efficiency and comfort of the air conditioner 1.

[0072] In the accompanying drawings of this utility model, the "one-way arrow" symbol only represents the flow direction of the refrigerant. The "two-way arrow" symbol only indicates the upstream and downstream positional relationship of the indoor heat exchanger 121.

[0073] In the description of this utility model, 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", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0074] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0075] In the description of this utility model, "multiple" means two or more.

[0076] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0077] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "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.

[0079] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner characterized by comprising: include: The compressor (11) has an exhaust port (112) and an intake port (111). An outdoor unit (13) is provided with at least one outdoor heat exchanger (131), the outdoor heat exchanger (131) is provided with an outdoor heat exchanger first port (132) and an outdoor heat exchanger second port (133), the outdoor heat exchanger first port (132) may be selectively connected to the exhaust port (112) or the intake port (111); An indoor unit (12) is provided with at least two indoor heat exchangers (121) and at least two first throttling devices. Each indoor heat exchanger (121) is connected in series with a corresponding first throttling device. Multiple indoor heat exchangers (121) are interconnected through their respective connected first throttling devices. One of the multiple indoor heat exchangers (121) is provided with a first interface (122) of the indoor unit (12), and another of the multiple indoor heat exchangers (121) is provided with a second interface (123) of the indoor unit (12). A third interface (124) of the indoor unit (12) is provided between two interconnected and adjacent indoor heat exchangers (121). The first interface (122) can be selectively connected to one of the exhaust port (112) and the intake port (111), the second interface (123) can be selectively connected to the other of the exhaust port (112) and the intake port (111), and the third interface (124) is connected to the second port (133) of the outdoor heat exchanger.

2. The air conditioner of claim 1, wherein The outdoor unit (13) is provided with multiple outdoor heat exchangers (131) and multiple second throttling devices. Each outdoor heat exchanger (131) is connected in series with a corresponding second throttling device. Each outdoor heat exchanger (131) is provided with an outdoor heat exchanger first port (132) and an outdoor heat exchanger second port (133). Each outdoor heat exchanger first port (132) can be selectively connected to the air intake (111) or the exhaust port (112).

3. The air conditioner of claim 2, wherein The second port (133) of each of the outdoor heat exchangers (131) is connected to each other via the respective second throttling devices connected in series and is connected to the third port (124).

4. The air conditioner of claim 2, wherein The air conditioner is equipped with a defrosting mode. In the defrosting mode, at least one of the multiple outdoor heat exchangers (131) connects the first port (132) of the outdoor heat exchanger to the air intake (111), and at least another of the multiple outdoor heat exchangers (131) connects the first port (132) of the outdoor heat exchanger to the exhaust port (112).

5. The air conditioner of claim 1, wherein Multiple indoor heat exchangers (121) are arranged sequentially in the direction of airflow. The indoor heat exchanger (121) located on the upstream side is provided with the first interface (122) of the indoor unit (12), and the indoor heat exchanger (121) located on the downstream side is provided with the second interface (123) of the indoor unit (12). The air conditioner is equipped with a dehumidification and reheat mode. In the dehumidification and reheat mode, the first interface (122) is connected to the air intake (111), and the second interface (123) is connected to the exhaust port (112).

6. The air conditioner according to claim 2, characterized in that, The indoor unit (12) is constructed as multiple units connected in parallel.

7. The air conditioner of claim 6, wherein The plurality of indoor units (12) include a first indoor unit (1201) and a second indoor unit (1202); wherein The air conditioner is equipped with a heat recovery mode. In the heat recovery mode, an indoor heat exchanger (121) in the first indoor unit (1201) is connected to the exhaust port (112) and in parallel with the outdoor heat exchanger (131). An indoor heat exchanger (121) in the first indoor unit (1201) and the outdoor heat exchanger (131) are respectively connected to an indoor heat exchanger (121) in the second indoor unit (1202). An indoor heat exchanger (121) in the second indoor unit (1202) is connected to the air intake (111).

8. The air conditioner of claim 6, wherein Also includes: The control valve (14) is provided with a D interface, an E2 interface, an S2 interface, a C2 interface, a C1 interface, an S1 interface and an E1 interface; The D interface is connected to the exhaust port (112), the E2 interface is connected to the second interface (123) of the plurality of indoor units (12), the S1 interface is connected to the air intake port (111), the S2 interface is connected to the air intake port (111), the C2 interface is connected to the first outdoor heat exchanger port (132) of one of the outdoor heat exchangers (131), the C1 interface is connected to the second outdoor heat exchanger port (133) of another outdoor heat exchanger (131), and the E1 interface is connected to the first interface (122) of the plurality of indoor units (12); wherein At least two of the E2 interface, S2 interface, C2 interface, C1 interface, S1 interface and E1 interface are connected to the D interface.

9. The air conditioner of claim 8, wherein The air conditioner also includes a solenoid valve, one end of which is connected between the S2 interface and the air intake (111), and the other end of which is connected between the S1 interface and the air intake (111).

10. The air conditioner of claim 8, wherein The control valve (14) has at least three valve positions, and when the control valve (14) is in multiple valve positions, the ratio of the number of interconnected interfaces is 3:2:

2.

11. The air conditioner of claim 10, wherein The control valve (14) includes a valve body, a valve cavity is formed in the valve body, a valve core is disposed in the valve cavity, the valve core is movably disposed in the valve cavity, the valve core divides the valve cavity into a first channel, a second channel and a third channel, the first channel is connected to the three interfaces, and the second channel and the third channel are each connected to two interfaces.

12. The air conditioner of claim 11, wherein The valve core is two in number, and the two valve cores and the valve body respectively form the second channel and the third channel.

13. The air conditioner of claim 8, wherein The control valve (14) has at least three valve positions, and when the control valve (14) is in multiple valve positions, the ratio of the number of interconnected interfaces is 3:

4.

14. The air conditioner of claim 13, wherein The control valve (14) includes a valve body, a valve cavity is formed in the valve body, a valve core is disposed in the valve cavity, the valve core is movably disposed in the valve cavity, the valve core divides the valve cavity into a first flow path and a second flow path, the first flow path connects to three of the interfaces, and the second flow path connects to four of the interfaces.

15. The air conditioner of claim 1, wherein The compressor (11) has a plurality of air intakes (111), and a plurality of indoor heat exchangers (121) in the indoor unit (12) are selectively connected to the corresponding air intakes (111).

16. The air conditioner of claim 1, wherein The compressor (11) has multiple air intake ports (111), and the outdoor unit (13) is provided with multiple outdoor heat exchangers (131), each of the outdoor heat exchangers (131) being selectively connected to the corresponding air intake port (111).

17. The air conditioner according to claim 1, characterized in that, Also includes: The first heat exchange branch (151) connects the second port (133) of the outdoor heat exchanger with the air intake (111) and / or the air replenishment and enthalpy increase port (113) of the compressor (11). The first heat exchange branch (151) is provided with a branch throttling device (1511). A plate heat exchanger (152) is provided with a first flow channel (1521) and a second flow channel (1522) that can exchange heat with each other. The first flow channel (1521) is located between the third interface (124) and the second port (133) of the outdoor heat exchanger. One end of the first heat exchange branch (151) is connected between the first flow channel (1521) and the second port (133) of the outdoor heat exchanger. The second flow channel (1522) is connected to the first heat exchange branch (151) and is located between the branch throttling device (1511) and the suction port (111) and / or the gas replenishment and enthalpy increase port (113) of the compressor (11).

18. The air conditioner of claim 17, wherein Also includes: The second heat exchange branch (153) has one end connected to the second interface (123) and the other end connected between the branch throttling device (1511) and the second flow channel (1522). The second heat exchange branch (153) can be selectively connected to or disconnected from the second flow channel (1522).

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