Air conditioner, control method and controller thereof, air conditioning system, and storage medium

Abstract

The application provides an air conditioner, a control method and controller thereof, an air conditioner system and a storage medium. The air conditioner comprises an outdoor heat exchanger, a compressor, a high-pressure gas pipe, a low-pressure gas pipe, a liquid pipe, a switching device and at least two indoor assemblies. The switching device controls the on-off between the high-pressure gas pipe, the low-pressure gas pipe and the second end of the outdoor heat exchanger and the exhaust port and the suction port of the compressor. The at least two indoor assemblies are connected in parallel and each comprises an indoor heat exchanger and a regulating device. The indoor heat exchanger has a low-pressure interface and a high-pressure interface. The low-pressure interface is connected with the low-pressure gas pipe and the liquid pipe. The high-pressure interface is connected with the high-pressure gas pipe and the liquid pipe. The regulating device controls the on-off between the low-pressure interface, the high-pressure interface and the liquid pipe, so as to cooperate with the switching device. When the indoor heat exchanger of a part of the at least two indoor assemblies is used for heating, the indoor heat exchanger of another part of the at least two indoor assemblies can be used for cooling. Thus, different requirements for cold and heat in different spaces can be conveniently met.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to an air conditioner and a control method thereof, a controller, an air conditioning system and a storage medium. Background Art

[0002] Traditional air conditioners can only operate in heating or cooling mode as a whole, and cannot meet the different heating and cooling needs of different spaces. However, as more and more buildings require simultaneous cooling and heating, some air conditioners that can operate in cooling and heating modes at the same time have emerged.

[0003] However, the air conditioners in the related art that can operate in cooling and heating modes at the same time have problems such as complex structure and inconvenient control, and it is difficult to conveniently meet the different cooling and heating needs of different spaces. Summary of the Invention

[0004] The present application aims to provide an air conditioner and its control method, controller, air conditioning system and storage medium to conveniently meet the different requirements of different spaces for cooling and heating.

[0005] In order to achieve the above-mentioned purpose, the air conditioner provided in this application includes:

[0006] compressor;

[0007] outdoor heat exchanger;

[0008] a liquid pipe connected to a first end of the outdoor heat exchanger;

[0009] High-pressure air pipe;

[0010] Low-pressure airway;

[0011] a switching device, connecting the high-pressure gas pipe, the low-pressure gas pipe, and the second end of the outdoor heat exchanger with the exhaust port and the air intake port of the compressor, and controlling the on-off between the high-pressure gas pipe, the low-pressure gas pipe, the second end of the outdoor heat exchanger, and the exhaust port and the air intake port of the compressor; and

[0012] At least two indoor components are arranged in parallel and each includes an indoor heat exchanger and a control device. The indoor heat exchanger has a low-pressure interface and a high-pressure interface. The low-pressure interface is connected to the low-pressure gas pipe and the liquid pipe, and the high-pressure interface is connected to the high-pressure gas pipe and the liquid pipe. The control device controls the on-off of the low-pressure interface and the high-pressure interface and the liquid pipe to cooperate with the switching device so that when the indoor heat exchanger of one part of the indoor components of the at least two indoor components is heating, the indoor heat exchanger of the other part of the indoor components can be cooled.

[0013] In some embodiments, the indoor heat exchanger further has a first liquid pipe interface and a second liquid pipe interface, which are respectively connected to the low-pressure interface and the high-pressure interface and the liquid pipe. The control device includes a first valve and a second valve. The first valve is arranged on the pipeline between the first liquid pipe interface and the liquid pipe, and controls the on and off. The second valve is arranged on the pipeline between the second liquid pipe interface and the liquid pipe, and controls the on and off.

[0014] In some embodiments, the switching device includes a first switching valve and a second switching valve, the first switching valve having a first port, a second port and a third port, the first port being connected to the exhaust port of the compressor, the second port being connected to the intake port of the compressor, the third port being connected to the second end of the outdoor heat exchanger, and being switchably connected to the first port and the second port, the second switching valve having a first valve port, a second valve port and a third valve port, the first valve port being connected to the exhaust port of the compressor, the second valve port being connected to the intake port of the compressor, the third valve port being switchably connected to the first valve port and the second valve port, the high-pressure air pipe being connected to the first port and the first valve port, and the low-pressure air pipe being connected to the third valve port.

[0015] In some embodiments, the first switching valve also has a fourth port, which is switchably connected to the first port and the second port and is cut off from the outside; and / or, the second switching valve also has a fourth valve port, which is switchably connected to the first valve port and the second valve port and is cut off from the outside.

[0016] In some embodiments, the first switching valve is a four-way valve; and / or the second switching valve is a four-way valve.

[0017] In some embodiments, among at least two indoor components, the indoor heat exchanger of at least one indoor component includes a first heat exchanger and a second heat exchanger. The first heat exchanger and the second heat exchanger can cool and dehumidify and heat and reheat the indoor air respectively. The low-pressure interface is set on the first heat exchanger, and the high-pressure interface is set on the second heat exchanger.

[0018] In some embodiments, the indoor heat exchanger including the first heat exchanger and the second heat exchanger also includes a first connecting pipe, a second connecting pipe, a first control valve and a second control valve. The first connecting pipe and the second connecting pipe are both connected between the first heat exchanger and the second heat exchanger. The first control valve and the second control valve are respectively arranged on the first connecting pipe and the second connecting pipe, and respectively control the on and off of the first connecting pipe and the second connecting pipe to control whether the first heat exchanger and the second heat exchanger are connected.

[0019] In some embodiments, at least one of the first control valve and the second control valve is a solenoid valve.

[0020] In some embodiments, at least one of the first valve and the second valve is a throttling valve.

[0021] In some embodiments, at least one of the first valve and the second valve is an expansion valve.

[0022] In some embodiments, the air conditioner includes at least three indoor components.

[0023] In some embodiments, the air conditioner further comprises at least one of the following:

[0024] A regulating valve is provided on the liquid pipe to throttle the refrigerant flowing through the liquid pipe;

[0025] The first on-off valve is provided on the high-pressure gas pipe to control the on-off of the high-pressure gas pipe;

[0026] The second on-off valve is provided on the low-pressure air pipe to control the on-off of the low-pressure air pipe;

[0027] A third on-off valve is provided on the liquid pipe to control the on-off of the liquid pipe;

[0028] A high-pressure sensor is installed on the pipeline between the exhaust port of the compressor and the switching device to perform high-pressure detection;

[0029] The low pressure sensor is installed on the pipeline between the suction port of the compressor and the switching device to perform low pressure detection.

[0030] In addition, the air conditioner control method provided in this application includes:

[0031] Determine the target operating mode of the air conditioner;

[0032] According to the determined target operating mode, the switching device and the regulating device are controlled so that the air conditioner operates in the target operating mode.

[0033] In some embodiments, the target operating mode is any one of overall cooling, overall heating, main cooling, main heating, and cooling and heating offset modes, and according to the determined target operating mode, controlling the switching device and the regulating device includes at least one of the following:

[0034] When the target operating mode is determined to be the overall cooling mode, the switching device is controlled to connect the second end of the outdoor heat exchanger to the exhaust port of the compressor and the low-pressure gas pipe to the suction port of the compressor, and the control device of each indoor component is controlled to connect and disconnect the low-pressure interface and high-pressure interface of the corresponding indoor heat exchanger to the liquid pipe respectively;

[0035] When the determined target operating mode is the full-heating mode, the control switching device connects the high-pressure gas pipe and the low-pressure gas pipe to the exhaust port of the compressor, connects the second end of the outdoor heat exchanger to the intake port of the compressor, and controls the control device of each indoor component to connect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger to the liquid pipe;

[0036] When the determined target operating mode is the main cooling mode, the control switching device connects the high-pressure gas pipe and the second end of the outdoor heat exchanger to the exhaust port of the compressor, and connects the low-pressure gas pipe to the suction port of the compressor, and controls the regulating device of the indoor component performing cooling to connect and disconnect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger to the liquid pipe, respectively, while controlling the regulating device of the indoor component performing heating to disconnect and connect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger to the liquid pipe, respectively;

[0037] When the determined target operating mode is the main heating mode, the switching device is controlled to connect the high-pressure gas pipe with the exhaust port of the compressor, and to connect the low-pressure gas pipe and the second end of the outdoor heat exchanger with the suction port of the compressor, and the regulating device of the indoor component performing cooling is controlled to connect and disconnect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger with the liquid pipe, respectively, while the regulating device of the indoor component performing heating is controlled to disconnect and connect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger with the liquid pipe, respectively;

[0038] When the determined target operating mode is the cooling and heating offset mode, the switching device is controlled to connect the high-pressure gas pipe with the exhaust port of the compressor, connect the low-pressure gas pipe with the suction port of the compressor, and disconnect the second end of the outdoor heat exchanger from both the suction port and the exhaust port of the compressor. The regulating device of the indoor component performing cooling is controlled to connect and disconnect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger with the liquid pipe, respectively, while the regulating device of the indoor component performing heating is controlled to disconnect and connect the low-pressure interface and the high-pressure interface of the corresponding indoor heat exchanger with the liquid pipe, respectively.

[0039] Among them, the overall cooling mode means that all indoor heat exchangers of the air conditioner are cooling; the overall heating mode means that all indoor heat exchangers of the air conditioner are heating; the main cooling mode means that part of the indoor heat exchangers of the air conditioner are cooling, and the other part of the indoor heat exchangers are heating, and the cooling demand is greater than the heating demand; the main heating mode means that part of the indoor heat exchangers of the air conditioner are cooling, and the other part of the indoor heat exchangers are heating, and the heating demand is greater than the cooling demand; the cold and heat offset mode means that part of the indoor heat exchangers of the air conditioner are cooling, and the other part of the indoor heat exchangers are heating, and the heating demand is equal to the cooling demand.

[0040] In some embodiments, the target operating mode is any one of overall cooling, overall heating, main cooling, main heating, and cooling and heating offset modes, and according to the determined target operating mode, controlling the switching device and the regulating device includes at least one of the following:

[0041] When the determined target operating mode is the overall cooling mode, the third port of the first switching valve of the control switching device is connected to the first port and disconnected from the second port, the third valve port of the second switching valve is connected to the second valve port and disconnected from the first valve port, and the first valve of the control device of each indoor component is opened and the second valve is closed;

[0042] When the determined target operating mode is the full-body heating mode, the third port of the first switching valve of the control switching device is connected to the second port and disconnected from the first port, the third valve port of the second switching valve is connected to the first valve port and disconnected from the second valve port, and the first valve and second valve of the control device of each indoor component are both opened;

[0043] When the determined target operating mode is the main cooling mode, the third port of the first switching valve of the control switching device is connected to the first port and disconnected from the second port, the third valve port of the second switching valve is connected to the second valve port and disconnected from the first valve port, and the first valve of the control device of the indoor component performing heating is closed and the second valve is opened, and the first valve of the control device of the indoor component performing cooling is opened and the second valve is closed;

[0044] When the determined target operating mode is the main heating mode, the third port of the first switching valve of the control switching device is connected to the second port and disconnected from the first port, the third valve port of the second switching valve is connected to the second valve port and disconnected from the first valve port, and the first valve of the control device of the indoor component performing heating is closed and the second valve is opened, and the first valve of the control device of the indoor component performing cooling is opened and the second valve is closed;

[0045] When the determined target operating mode is the cold and heat offset mode, the third port of the first switching valve of the control switching device is connected to the first port and disconnected from the second port, the third valve port of the second switching valve is connected to the second valve port and disconnected from the first valve port, and the first valve of the control device of the indoor component for heating is closed and the second valve is opened, and the first valve of the control device of the indoor component for cooling is opened and the second valve is closed.

[0046] In some embodiments, the target operating mode is a dehumidification mode, and controlling the switching device and the regulating device according to the determined target operating mode includes:

[0047] The control device controls the indoor component that performs dehumidification to connect both the low-pressure interface and the high-pressure interface to the liquid pipe, and controls the switching device to connect the high-pressure gas pipe and the second end of the outdoor heat exchanger to the exhaust port of the compressor, and connect the low-pressure gas pipe to the intake port of the compressor, or controls the switching device to connect the high-pressure gas pipe to the exhaust port of the compressor, and connect the low-pressure gas pipe and the second end of the outdoor heat exchanger to the intake port of the compressor;

[0048] The dehumidification mode means that the first heat exchanger of the indoor heat exchanger of at least one indoor component cools and dehumidifies the indoor air, and the second heat exchanger heats and reheats the indoor air.

[0049] In some embodiments, the target operating mode is a dehumidification mode, and controlling the switching device and the regulating device according to the determined target operating mode includes:

[0050] The first valve and the second valve of the control device of the indoor component that controls dehumidification are both opened, and the third port of the first switching valve of the control switching device is connected to the first port and disconnected from the second port, and the third valve port of the second switching valve is connected to the second valve port and disconnected from the first valve port, or the third port of the first switching valve of the control switching device is connected to the second port and disconnected from the first port, and the third valve port of the second switching valve is connected to the second valve port and disconnected from the first valve port.

[0051] In some embodiments, in the process of controlling the switching device and the regulating device according to the determined target operation mode, the first control valve and the second control valve of the indoor component are also controlled.

[0052] In some embodiments, controlling the first control valve and the second control valve of the indoor component includes at least one of the following:

[0053] For the indoor heat exchanger performing dehumidification, the first control valve and the second control valve are controlled to be closed;

[0054] For the indoor heat exchanger that performs only cooling or only heating, the first control valve and the second control valve are controlled to be open.

[0055] In addition, the controller provided in the present application includes a memory and a processor coupled to the memory, and the processor is configured to execute the control method of any embodiment based on instructions stored in the memory.

[0056] In addition, the air conditioning system provided in the present application includes the air conditioner of any embodiment and the controller of any embodiment.

[0057] In addition, the computer-readable storage medium provided in the present application stores computer instructions, and the computer instructions are used by a processor to execute the control method of any embodiment.

[0058] The present application provides a switching device and at least two indoor components including three-pipe indoor heat exchangers and a control device in the air conditioner, and sets the connection relationship between the indoor heat exchanger, the control device, the switching device, and the high-pressure gas pipe, the low-pressure gas pipe and the liquid pipe, so that the air conditioner can achieve simultaneous cooling and heating functions based on a relatively simple structure and a relatively simple control process, and conveniently meet the different cooling and heating needs of different spaces.

[0059] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0061] Figure 1 This is a schematic diagram of the structure of the air conditioner in the embodiment of the present application.

[0062] Figure 2 for Figure 1 Schematic diagram of the structure of the indoor heat exchanger.

[0063] Figure 3 for Figure 1 The figure shows the status of the air conditioner in the overall cooling mode.

[0064] Figure 4 for Figure 1 The figure shows the status of the air conditioner in full heating mode.

[0065] Figure 5 for Figure 1 The figure shows the status of the air conditioner in the main cooling mode.

[0066] Figure 6 for Figure 1 The figure shows the status of the air conditioner in the main heating mode.

[0067] Figure 7 for Figure 1 The diagram shows the status of the air conditioner in the cooling and heating offset mode.

[0068] Figure 8 It is a structural schematic diagram of the indoor heat exchanger in a modified example.

[0069] Figure 9 Schematic diagram of the control method in the embodiment of the present application.

[0070] Figure 10 Schematic diagram of the structure of the controller in the embodiment of the present application.

[0071] Description of reference numerals:

[0072] 10. Air conditioning; 101. Switching device;

[0073] 1. Compressor; 11. Exhaust port; 12. Intake port;

[0074] 21. Oil content; 22. Steam content;

[0075] 3. First switching valve; 31. First port; 32. Second port; 33. Third port; 34. Fourth port;

[0076] 4. Second switching valve; 41. First valve port; 42. Second valve port; 43. Third valve port; 44. Fourth valve port;

[0077] 5. Outdoor heat exchanger;

[0078] 61. High-pressure gas pipe; 62. Low-pressure gas pipe; 63. Liquid pipe; 64. Control valve; 65. First on-off valve; 66. Second on-off valve; 67. Third on-off valve;

[0079] 7. Indoor components; 71. Indoor heat exchanger; 711. First heat exchanger; 712. Second heat exchanger; 713. First connecting pipe; 714. Second connecting pipe; 715. First control valve; 716. Second control valve; 71a. Low-pressure interface; 71b. First liquid pipe interface; 71c. High-pressure interface; 71d. Second liquid pipe interface; 72. Low-pressure connecting pipe; 73. High-pressure connecting pipe; 74. First branch pipe; 75. Second branch pipe; 76. First valve; 77. Second valve; 78. Control device;

[0080] 81. High pressure sensor; 82. Low pressure sensor;

[0081] 9. Controller; 91. Memory; 92. Processor; 93. Communication interface; 94. Bus. DETAILED DESCRIPTION

[0082] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of this application.

[0083] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0084] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0085] In the description of this application, it should be understood that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0086] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0087] Traditional air conditioners usually cannot meet the needs of simultaneous cooling and heating in different spaces (such as different rooms in the same building), and are not efficient in energy utilization. Even some multi-split systems with at least two indoor units can usually only operate in the same working mode, for example, they can only operate in cooling mode, or they can only operate in heating mode. This means that the multi-split system can only operate in cooling or heating mode as a whole, and cannot operate in cooling mode for one part and heating mode for the other part. As a result, the corresponding multi-split system cannot provide cooling and heating at the same time, making it difficult to meet the needs of cooling one space and heating for another space. In other words, it is difficult to meet the different cooling and heating needs of different spaces.

[0088] In response to the above situation, some air conditioners have emerged in the relevant technologies, whose different indoor units can operate in different working modes, so that the air conditioner can provide cooling and heating at the same time to meet the different cooling and heating needs of different spaces. However, in these related technologies, the air conditioners that can provide cooling and heating at the same time, the indoor heat exchanger of the indoor unit is usually a two-pipe heat exchanger. In this case, to achieve the simultaneous cooling and heating functions, a converter needs to be installed between the indoor unit and the outdoor unit to control the flow direction of the refrigerant in order to achieve the switching between cooling and heating modes. This leads to the problems of complex structure and inconvenient control of the corresponding air conditioner.

[0089] Therefore, how to conveniently meet the different needs of different spaces for cooling and heating, that is, how to conveniently meet the needs of cooling one space and heating another space, is still a problem.

[0090] In response to the above situation, the present application provides an air conditioner and its control method, controller, air conditioning system and storage medium to conveniently meet the different needs of different spaces for cooling and heating.

[0091] Figures 1-8 The structure and working process of the air conditioner in this application are shown exemplarily. Figure 9 The control method in this application is shown as an example. Figure 10 The structure of the controller in this application is shown as an example.

[0092] See also Figures 1-8 In an embodiment of the present application, the air conditioner 10 includes a compressor 1, an outdoor heat exchanger 5, a liquid pipe 63, a high-pressure gas pipe 61, a low-pressure gas pipe 62, a switching device 101 and at least two indoor components 7.

[0093] The liquid pipe 63 is connected to a first end of the outdoor heat exchanger 5 .

[0094] The second end of the outdoor heat exchanger 5 and the high-pressure air pipe 61 and the low-pressure air pipe 62 are all connected to the exhaust port 11 and the air intake port 12 of the compressor 1 through the switching device 101, and the connection and disconnection between the second end of the outdoor heat exchanger 5 and the high-pressure air pipe 61 and the low-pressure air pipe 62 and the exhaust port 11 and the air intake port 12 of the compressor 1 is controlled by the switching device 101. That is, the switching device 101 connects the high-pressure air pipe 61, the low-pressure air pipe 62 and the second end of the outdoor heat exchanger 5 to the exhaust port 11 and the air intake port 12 of the compressor 1, and controls the connection and disconnection between the high-pressure air pipe 61, the low-pressure air pipe 62 and the second end of the outdoor heat exchanger 5 and the exhaust port 11 and the air intake port 12 of the compressor 1.

[0095] At least two indoor components 7 are arranged in parallel, and each includes an indoor heat exchanger 71 and a control device 78. The indoor heat exchanger 71 has a low-pressure interface 71a and a high-pressure interface 71c. The low-pressure interface 71a is connected to the low-pressure gas pipe 62 and the liquid pipe 63, and the high-pressure interface 71c is connected to the high-pressure gas pipe 61 and the liquid pipe 63. The control device 78 controls the connection and disconnection of the low-pressure interface 71a and the high-pressure interface 71c and the liquid pipe 63 to cooperate with the switching device 101, so that when the indoor heat exchanger 71 of one part of the indoor components 7 of at least two indoor components 7 is heating, the indoor heat exchanger 71 of another part of the indoor components 7 can be cooled.

[0096] In the above scheme, the air conditioner 10 is a multi-split unit having at least two indoor components 7, and each of the indoor components 7 can operate independently through the cooperation of its own control device 78 and the switching device 101, and operate in different working modes, that is, some of the indoor components 7 operate in cooling mode, and the other part of the indoor components 7 operate in heating mode, so that the air conditioner 10 can not only cool or heat as a whole, but also cool and heat at the same time, to meet the different needs of different spaces for cooling and heating.

[0097] When part of the indoor components 7 operate in cooling mode and the other part of the indoor components 7 operate in heating mode, there are three situations, corresponding to the three working modes of main cooling mode, main heating mode and cold and hot offset mode.

[0098] Among them, when a part of the indoor components 7 operate in cooling mode and another part of the indoor components 7 operate in heating mode, and the cooling demand is greater than the heating demand, it is called the main cooling mode, that is, the main cooling mode means that a part of the indoor components 7 of the air conditioner 10 are cooling, and another part of the indoor components 7 are heating, and the cooling demand is greater than the heating demand, or it means that a part of the indoor heat exchanger 71 of the air conditioner 10 is cooling, and another part of the indoor heat exchanger 71 is heating, and the cooling demand is greater than the heating demand.

[0099] When a part of the indoor components 7 operate in cooling mode and another part of the indoor components 7 operate in heating mode, and the heating demand is greater than the cooling demand, it is called the main heating mode. That is, the main heating mode means that a part of the indoor components 7 of the air conditioner 10 are cooling, and another part of the indoor components 7 are heating, and the heating demand is greater than the cooling demand, or it means that a part of the indoor heat exchanger 71 of the air conditioner 10 is cooling, and another part of the indoor heat exchanger 71 is heating, and the heating demand is greater than the cooling demand.

[0100] When part of the indoor components 7 operate in cooling mode and the other part of the indoor components 7 operate in heating mode, and the cooling demand is equal to the heating demand, it is called the cold and heat offset mode. That is, the cold and heat offset mode means that part of the indoor components 7 of the air conditioner 10 are cooling, and the other part of the indoor components 7 are heating, and the cooling demand is equal to the heating demand, or in other words, it means that part of the indoor heat exchanger 71 of the air conditioner 10 is cooling, and the other part of the indoor heat exchanger 71 is heating, and the cooling demand is equal to the heating demand.

[0101] Figure 5-Figure 7 States of the air conditioner 10 in the main cooling mode, the main heating mode, and the cooling and heating offset mode are exemplarily shown respectively.

[0102] like Figure 5As shown, in the main cooling mode, the switching device 101 connects the high-pressure gas pipe 61 and the second end of the outdoor heat exchanger 5 to the exhaust port 11 of the compressor 1, and connects the low-pressure gas pipe 62 to the intake port 12 of the compressor 1. The control device 78 of the indoor component 7 for cooling connects and disconnects the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63, respectively, while the control device 78 of the indoor component 7 for heating disconnects and connects the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63, respectively. In this case, the outdoor heat exchanger 5 acts as a condenser, the indoor heat exchanger 71 for heating acts as a condenser, and the indoor heat exchanger 71 for cooling acts as an evaporator, and as shown in FIG. Figure 5 As shown by the arrow, the refrigerant is in the indoor component 7 (for example Figure 5 After releasing heat at the indoor heat exchanger 71 of the indoor component 7 on the right side of the middle, the heat flows into the liquid pipe 63 and then passes through the indoor component 7 for cooling (for example Figure 5 After passing through the control device 78 of the indoor component 7 on the left side of the middle, the refrigerant enters the indoor heat exchanger 71 of the corresponding indoor component 7 to absorb heat. Thereafter, the refrigerant enters the low-pressure gas pipe 62, flows through the switching device 101, and returns to the compressor 1. After being compressed by the compressor 1, it forms high-pressure gas. A portion of the high-pressure gas does not pass through the switching device 101, but directly returns to the indoor component 7 for heating through the high-pressure gas pipe 61, completing a refrigeration cycle and realizing heat transfer from the cooling space to the heating space, so that the total cooling and heating load of the building is partially offset. The remaining refrigerant flows to the outdoor heat exchanger 5 through the switching device 101. The outdoor heat exchanger 5 acts as a condenser and bears the excess cooling load of the building. After the heat exchange with the outdoor heat exchanger 5 is completed, the refrigerant enters the indoor component 7 for cooling through the liquid pipe 63 to absorb heat, and then returns to the compressor 1 through the switching device 101.

[0103] like Figure 6 As shown, in the main heating mode, the switching device 101 connects the high-pressure gas pipe 61 to the exhaust port 11 of the compressor 1, and connects the low-pressure gas pipe 62 and the second end of the outdoor heat exchanger 5 to the suction port 12 of the compressor 1. The control device 78 of the indoor component 7 for cooling connects and disconnects the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63, respectively, while the control device 78 of the indoor component 7 for heating disconnects and connects the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63, respectively. In this case, the outdoor heat exchanger 5 functions as an evaporator, the indoor heat exchanger 71 for heating functions as a condenser, and the indoor heat exchanger 71 for cooling functions as an evaporator. Figure 6 As shown by the arrow, the exhaust gas of the compressor 1 does not pass through the switching device 101, but directly enters the indoor heating component 7 through the high-pressure gas pipe 61 ( Figure 6In the indoor component 7 on the right side of the middle, after the heat is released at the indoor heat exchanger 71 of the corresponding indoor component 7, a part of the refrigerant flows to the indoor component 7 for cooling, absorbs heat at the indoor heat exchanger 71 of the corresponding indoor component 7 for cooling, and then returns to the compressor 1 through the switching device 101. The cooling and heating loads in this part of the building are offset. The remaining part of the refrigerant flows to the outdoor heat exchanger 5 through the liquid pipe 63, absorbs heat outdoors, and then returns to the compressor 1 through the switching device 101. This part of the heat load is borne by the outdoor heat exchanger 5.

[0104] like Figure 7 As shown, in the cooling and heating offset mode, the switching device 101 connects the high-pressure gas pipe 61 to the exhaust port 11 of the compressor 1, connects the low-pressure gas pipe 62 to the intake port 12 of the compressor 1, and disconnects the second end of the outdoor heat exchanger 5 from both the intake port 12 and the exhaust port 11 of the compressor 1. Furthermore, the control device 78 of the indoor component 7 performing cooling connects and disconnects the low-pressure interface 71a and high-pressure interface 71c of the corresponding indoor heat exchanger 71 from the liquid pipe 63, respectively. Meanwhile, the control device 78 of the indoor component 7 performing heating disconnects and connects the low-pressure interface 71a and high-pressure interface 71c of the corresponding indoor heat exchanger 71 from the liquid pipe 63, respectively. In this case, the outdoor heat exchanger 5 is not activated, the indoor heat exchanger 71 performing heating functions as a condenser, and the indoor heat exchanger 71 performing cooling functions as an evaporator, both connected to the compressor 1 circuit, achieving heat circulation within the building without exchanging heat with the outside.

[0105] It can be seen that the air conditioner 10 provided in the above embodiment can realize multiple working modes such as main cooling, main heating and cold and heat offset based on the cooperation between the switching device 101 and the control device 78 of at least two indoor components 7. It is rich in functions, diverse in modes, flexible and practical.

[0106] Among them, since the air conditioner 10 realizes the main cooling, main heating and cold and heat offset modes, different indoor components 7 operate in different modes, one part is cooling and the other part is heating, realizing the simultaneous cooling and heating functions of the air conditioner 10. Therefore, it can effectively meet the different needs of different spaces for cooling and heating, thereby effectively improving the energy utilization rate of the air conditioner 10, reducing the energy consumption of the air conditioner 10, reducing the operating cost of the air conditioner 10, and enhancing the practicality of the air conditioner 10.

[0107] Moreover, since the condensing load and evaporation load of different spaces in the building can be utilized in the main cooling, main heating and cold and heat offset modes, the cooling load of the cooling space can provide heat for the heating space, thereby realizing heat recovery from different spaces in the building. Therefore, the flow through the outdoor side can also be reduced, and the heat exchange with the outdoor can be reduced. This is conducive to alleviating the problem of condensation in the indoor heat exchanger for cooling in winter and easy frost in the outdoor heat exchanger for heating in winter, thereby improving the operating reliability of the air conditioner 10. Specifically, in traditional air conditioners, the cooling load of the refrigeration space is completely provided by the outdoor side. During winter cooling, the outdoor temperature is low. After the refrigerant flows through the outdoor heat exchanger to release heat, it reaches a lower temperature. When it flows through the indoor unit, it is easy to form condensation on the indoor unit, damaging the indoor unit circuit and reducing human comfort. In the scheme of the aforementioned embodiment, part of the cooling load of the refrigeration space can be provided by the heating space. The temperature of the heating space is much higher than the outdoor temperature. After the refrigerant flows through the indoor heat exchanger 71 of the heating space, the temperature is higher. In this way, when it subsequently flows through the refrigeration space, the temperature is higher and condensation is not easy to form. This can reduce the risks of circuit damage and reduced comfort caused by condensation in the indoor unit, thereby improving the reliability and practicality of the unit. In addition, in traditional air conditioners, the heating space load is also completely provided by the outdoor side and a part of the electric energy. During winter heating, the outdoor temperature is low. When the refrigerant flows through the outdoor heat exchanger to absorb heat, the temperature is low, and it is easy to frost on the heat exchanger, affecting the heat exchange efficiency and increasing the energy consumption of the unit defrosting. The solution of the aforementioned embodiment fully utilizes the cooling load of the refrigeration space to provide heat for the heating space, reducing the burden on the outdoor heat exchanger. Therefore, it can effectively solve the problem of frosting of the outdoor heat exchanger, improve the heat exchange efficiency, reduce the energy consumption of defrosting, and thus improve the reliability and practicality of the unit.

[0108] It can be seen that the air conditioner 10 provided in the above embodiment has the function of providing cooling and heating at the same time, which can effectively meet the different needs of different spaces for cooling and heating. This is not only conducive to improving the energy utilization rate of the air conditioner 10 and reducing the energy consumption of the air conditioner 10, but also conducive to alleviating the problems of condensation generated by winter cooling and easy frost of the outdoor heat exchanger for winter heating, thereby improving the operating reliability of the air conditioner 10.

[0109] Furthermore, the indoor heat exchanger 71 of the air conditioner 10 provided in the aforementioned embodiment no longer utilizes a two-pipe structure, but rather a three-pipe structure. Accordingly, the three-pipe indoor heat exchanger 71 can be directly connected to the high-pressure gas pipe 61, the low-pressure gas pipe 62, and the liquid pipe 63 without requiring a converter. Therefore, without requiring a converter within the air conditioner 10, the indoor components 7 can be easily switched between cooling and heating modes, achieving the simultaneous cooling and heating functions of the air conditioner 10. The omission of the converter results in a simpler structure, easier assembly, smaller installation space, and lower equipment costs. Furthermore, during operation, there is no need to control the switching state of the converter, making control more convenient.

[0110] It can be seen that the aforementioned embodiment provides a switching device 101 and at least two indoor components 7 including a control device 78 and a three-pipe indoor heat exchanger 71 in the air conditioner 10, and sets the connection relationship between the indoor heat exchanger 71, the control device 78, the switching device 101 and the high-pressure gas pipe 61, the low-pressure gas pipe 62 and the liquid pipe 63, so that the air conditioner 10 can realize the simultaneous cooling and heating functions based on a simpler structure and a simpler control process, and conveniently meet the different cooling and heating needs of different spaces.

[0111] In addition, the air conditioner 10 of the aforementioned embodiment, with the cooperation of the switching device 101 and the various control devices 78, can also enable each indoor component 7 to operate in the same working mode as other indoor components, that is, all indoor components 7 operate in cooling or heating mode.

[0112] Among them, when all indoor components 7 are operating in cooling mode, it is called overall cooling mode, that is, overall cooling mode means that all indoor components 7 of the air conditioner 10 are operating in cooling mode, or in other words, all indoor heat exchangers 71 of the air conditioner 10 are performing cooling.

[0113] When all indoor components 7 are operating in heating mode, it is called full heating mode, that is, full heating mode means that all indoor components 7 of the air conditioner 10 are operating in heating mode, or in other words, all indoor heat exchangers 71 of the air conditioner 10 are heating.

[0114] Figure 3 and Figure 4 The states of the air conditioner 10 in the overall cooling mode and the overall heating mode are exemplarily shown.

[0115] like Figure 3 As shown, in the overall cooling mode, the switching device 101 connects the second end of the outdoor heat exchanger 5 to the exhaust port 11 of the compressor 1, and connects the low-pressure gas pipe 62 to the intake port 12 of the compressor 1. The control device 78 of each indoor component 7 connects and disconnects the low-pressure interface 71a and high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63 respectively. In this case, the high-pressure gas pipe 61 is not activated, and all indoor heat exchangers 71 are used as evaporators. Figure 3 As shown by the arrows, the exhaust gas from the compressor 1 flows through the outdoor heat exchanger 5 via the switching device 101 and enters the liquid pipe 63. Then, it flows through the control devices 78 of each indoor component 7 and enters each indoor heat exchanger 71. In the indoor heat exchanger 71, it absorbs indoor heat and turns into a gaseous condensing agent. Then, it flows back to the compressor 1 via the low-pressure gas pipe 62 and the switching device 101, completing a refrigeration cycle.

[0116] like Figure 4As shown, in the full heating mode, the switching device 101 connects the high-pressure gas pipe 61 and the low-pressure gas pipe 62 to the exhaust port 11 of the compressor 1, and connects the second end of the outdoor heat exchanger 5 to the intake port 12 of the compressor 1. The control device 78 that controls each indoor component 7 connects the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63. In this case, the high-pressure gas pipe 61 and the low-pressure gas pipe 62 are both activated, and all indoor heat exchangers 71 are used as condensers. Figure 4 As shown by the arrows, part of the exhaust gas from the compressor 1 directly enters each indoor heat exchanger 71 through the high-pressure gas pipe 61, and the other part enters the low-pressure gas pipe 62 through the switching device 101 and flows into each indoor heat exchanger 71. The refrigerant entering the indoor heat exchanger 71, after completing heat release at the indoor heat exchanger 71, becomes liquid refrigerant, enters the liquid pipe 63, flows into the outdoor heat exchanger 5 to absorb heat, and then flows through the switching device 101 and flows back to the compressor 1, completing a heating cycle.

[0117] It can be seen that the air conditioner 10 provided in the aforementioned embodiment, based on the cooperation between the switching device 101 and the control device 78 of at least two indoor components 7, can not only realize the main cooling, main heating and cold and heat offset modes, but also can realize the whole cooling and whole heating modes. In other words, it can realize multiple working modes such as whole cooling, whole heating, main cooling, main heating and cold and heat offset. Therefore, it is rich in functions, diverse in modes, flexible and practical.

[0118] The switching device 101 and the regulating device 78 may have various structural forms. For example, the switching device 101 and the regulating device 78 may include only one valve, or the switching device 101 and the regulating device 78 may include at least two valves.

[0119] As an example of the control device 78 including at least two valves, see Figures 1-8 The control device 78 includes a first valve 76 and a second valve 77, which respectively control the connection between the low-pressure interface 71a and the high-pressure interface 71c and the liquid pipe 63. Figures 1-8In some embodiments, the indoor heat exchanger 71 has not only a low-pressure port 71a and a high-pressure port 71c, but also a first liquid pipe port 71b and a second liquid pipe port 71d. The first liquid pipe port 71b and the second liquid pipe port 71d connect the low-pressure port 71a and the high-pressure port 71c to the liquid pipe 63, respectively. Furthermore, the control device 78 includes a first valve 76 and a second valve 77. The first valve 76 is disposed in the pipeline between the first liquid pipe port 71b and the liquid pipe 63 to control on / off. The second valve 77 is disposed in the pipeline between the second liquid pipe port 71d and the liquid pipe 63 to control on / off. In this way, the on / off between the low-pressure port 71a and the liquid pipe 63, and the on / off between the high-pressure port 71c and the liquid pipe 63, are controlled by the first valve 76 and the second valve 77, respectively, which is simpler, more convenient, and more accurate.

[0120] In addition, as an example in which the switching device 101 includes at least two valves, see Figures 1-8 The switching device 101 includes a first switching valve 3 and a second switching valve 4. The first switching valve 3 has a first port 31, a second port 32 and a third port 33. The first port 31 is connected to the exhaust port 11 of the compressor 1, the second port 32 is connected to the intake port 12 of the compressor 1, and the third port 33 is connected to the second end of the outdoor heat exchanger 5, and is switchably connected to the first port 31 and the second port 32. The second switching valve 4 has a first valve port 41, a second valve port 42 and a third valve port 43. The first valve port 41 is connected to the exhaust port 11 of the compressor 1, the second valve port 42 is connected to the intake port 12 of the compressor 1, and the third valve port 43 is switchably connected to the first valve port 41 and the second valve port 42. The high-pressure air pipe 61 is connected to the first port 31 and the first valve port 41, and the low-pressure air pipe 62 is connected to the third valve port 43. Thus, the on-off relationship between the second end of the outdoor heat exchanger 5, the high-pressure gas pipe 61, the low-pressure gas pipe 62, and the exhaust port 11 and intake port 12 of the compressor 1 is controlled by the first switching valve 3 and the second switching valve 4, which is simple and convenient. The first switching valve 3 and the second switching valve 4 can flexibly and accurately cooperate with the control device 78 to achieve various operating modes, such as overall cooling, overall heating, main cooling, main heating, and cold and heat offset.

[0121] As an example in which both the control device 78 and the switching device 101 include at least two valves, see Figures 1-8 The switching device 101 includes a first switching valve 3 and a second switching valve 4 , and the regulating device 78 includes a first valve 76 and a second valve 77 .

[0122] Among them, the first switching valve 3 has a first port 31, a second port 32 and a third port 33. The first port 31 is connected to the exhaust port 11 of the compressor 1, the second port 32 is connected to the intake port 12 of the compressor 1, and the third port 33 is connected to the second end of the outdoor heat exchanger 5, and is switchably connected to the first port 31 and the second port 32.

[0123] The second switching valve 4 has a first valve port 41, a second valve port 42 and a third valve port 43. The first valve port 41 is connected to the exhaust port 11 of the compressor 1, the second valve port 42 is connected to the intake port 12 of the compressor 1, and the third valve port 43 is switchably connected to the first valve port 41 and the second valve port 42.

[0124] The high-pressure gas pipe 61 is connected to the first port 31 and the first valve port 41. The low-pressure gas pipe 62 is connected to the third valve port 43. The liquid pipe 63 is connected to a first end of the outdoor heat exchanger 5.

[0125] At least two indoor components 7 are arranged in parallel, and each includes an indoor heat exchanger 71, a first valve 76 and a second valve 77. The indoor heat exchanger 71 has a low-pressure interface 71a, a first liquid pipe interface 71b, a high-pressure interface 71c and a second liquid pipe interface 71d. The low-pressure interface 71a and the first liquid pipe interface 71b are interconnected and connected to the low-pressure gas pipe 62 and the liquid pipe 63 respectively. The high-pressure interface 71c and the second liquid pipe interface 71d are interconnected and connected to the high-pressure gas pipe 61 and the liquid pipe 63 respectively. The first valve 76 is arranged on the pipeline between the first liquid pipe interface 71b and the liquid pipe 63, and controls the on-off. The second valve 77 is arranged on the pipeline between the second liquid pipe interface 71d and the liquid pipe 63, and controls the on-off.

[0126] In the above scheme, the air conditioner 10 is a multi-split unit with at least two indoor components 7, and each indoor component 7 thereof can operate independently through the cooperation of its respective first valve 76 and second valve 77 with the first switching valve 3 and the second switching valve 4. It can operate in the same working mode as other indoor components 7, that is, all indoor components 7 operate in cooling or heating mode, and can also operate in different working modes with other indoor components 7, that is, some indoor components 7 operate in cooling mode, and other indoor components 7 operate in heating mode, so that the air conditioner 10 can not only cool or heat as a whole, realizing overall cooling and overall heating modes, but also cool and heat at the same time, realizing overall cooling, main heating and cold and heat offset modes, meeting the different requirements of different spaces for cooling and heating.

[0127] Figure 3-Figure 7 States of the air conditioner 10 in the overall cooling mode, the overall heating mode, the main cooling mode, the main heating mode, and the cooling and heating offset mode are exemplarily shown respectively.

[0128] like Figure 3 As shown, in the overall cooling mode, the third port 33 of the first switching valve 3 is connected to the first port 31 and disconnected from the second port 32, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of each indoor component 7 is opened and the second valve 77 is closed. In this case, the high-pressure gas pipe 61 is not activated, and all indoor heat exchangers 71 are used as evaporators, and as shown in FIG. Figure 3As shown by the arrows, the exhaust gas from the compressor 1 flows through the first port 31 and the third port 33 of the first switching valve 3, passes through the outdoor heat exchanger 5, enters the liquid pipe 63, and then flows through the first valve 76 of each indoor component 7, enters each indoor heat exchanger 71, absorbs indoor heat in the indoor heat exchanger 71, and turns into a gaseous condenser. Thereafter, it flows back to the compressor 1 through the low-pressure gas pipe 62 and the third valve port 43 and the second valve port 42 of the second switching valve 4, completing a refrigeration cycle.

[0129] like Figure 4 As shown, in the full heating mode, the third port 33 of the first switching valve 3 is connected to the second port 32 and disconnected from the first port 31, the third valve port 43 of the second switching valve 4 is connected to the first valve port 41 and disconnected from the second valve port 42, and the first valve 76 and the second valve 77 of each indoor component 7 are both open. In this case, the high-pressure gas pipe 61 and the low-pressure gas pipe 62 are both enabled, all indoor heat exchangers 71 function as condensers, and, as shown in FIG. Figure 4 As shown by the arrows, part of the exhaust gas from the compressor 1 directly enters each indoor heat exchanger 71 through the high-pressure gas pipe 61, and the other part enters the low-pressure gas pipe 62 through the first valve port 41 and the third valve port 43 of the second switching valve 4, and flows into each indoor heat exchanger 71. The refrigerant entering the indoor heat exchanger 71, after completing heat release at the indoor heat exchanger 71, becomes a liquid refrigerant, enters the liquid pipe 63, flows into the outdoor heat exchanger 5 to absorb heat, and then flows through the third port 33 and the second port 32 of the first switching valve 3, and flows back to the compressor 1, completing a heating cycle.

[0130] like Figure 5 As shown, in the main cooling mode, the third port 33 of the first switching valve 3 is connected to the first port 31 and disconnected from the second port 32, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of the indoor unit 7 for heating is closed and the second valve 77 is open, while the first valve 76 of the indoor unit 7 for cooling is opened and the second valve 77 is closed. In this case, the outdoor heat exchanger 5 functions as a condenser, the indoor heat exchanger 71 for heating functions as a condenser, and the indoor heat exchanger 71 for cooling functions as an evaporator, and as shown in FIG. Figure 5 As shown by the arrow, the refrigerant is in the indoor component 7 (for example Figure 5 After releasing heat at the indoor heat exchanger 71 of the indoor component 7 on the right side of the middle, the heat flows into the liquid pipe 63 through the second valve 77 of the corresponding indoor component 7, and then passes through the indoor component 7 for cooling (for example Figure 5After passing through the first valve 76 of the indoor component 7 on the left side of the middle, the refrigerant enters the indoor heat exchanger 71 of the corresponding indoor component 7, absorbs heat, and then enters the low-pressure gas pipe 62, and then flows through the third valve port 43 and the second valve port 42 of the second switching valve 4, returns to the compressor 1, and is compressed by the compressor 1 to form high-pressure gas. Part of the high-pressure gas does not pass through the first switching valve 3 and the second switching valve 4, and directly returns to the indoor component 7 for heating through the high-pressure gas pipe 61, completing a refrigeration cycle, realizing heat transfer from the cooling space to the heating space, so that the total cooling and heating load of the building is partially offset, and the remaining refrigerant flows through the first port 31 and the third port 33 of the first switching valve 3 to the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as a condenser and bears the excess cooling load of the building. After the heat exchange with the outdoor heat exchanger 5 is completed, the refrigerant enters the indoor component 7 for cooling through the liquid pipe 63 to absorb heat, and then returns to the compressor 1 through the second switching valve 4.

[0131] like Figure 6 As shown, in the main heating mode, the third port 33 of the first switching valve 3 is connected to the second port 32 and disconnected from the first port 31, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of the indoor unit 7 for heating is closed and the second valve 77 is open, while the first valve 76 of the indoor unit 7 for cooling is opened and the second valve 77 is closed. In this case, the outdoor heat exchanger 5 functions as an evaporator, the indoor heat exchanger 71 for heating functions as a condenser, and the indoor heat exchanger 71 for cooling functions as an evaporator, and as shown in FIG. Figure 6 As shown by the arrow, the exhaust gas of the compressor 1 does not pass through the first switching valve 3 and the second switching valve 4, but directly enters the indoor heating component 7 through the high-pressure gas pipe 61 ( Figure 6 In the indoor component 7 on the right side of the middle, after the heat release is completed at the indoor heat exchanger 71 of the corresponding indoor component 7, a part of the refrigerant flows to the indoor component 7 for cooling, absorbs heat at the indoor heat exchanger 71 of the corresponding indoor component 7 for cooling, and then returns to the compressor 1 through the third valve port 43 and the second valve port 42 of the second switching valve 4. The cooling and heating loads in this part of the building are offset. The remaining part of the refrigerant flows to the outdoor heat exchanger 5 through the liquid pipe 63, absorbs heat outdoors, and then returns to the compressor 1 through the third port 33 and the second port 32 of the first switching valve 3. This part of the heat load is borne by the outdoor heat exchanger 5.

[0132] like Figure 7As shown, in the cold / hot offset mode, the third port 33 of the first switching valve 3 is connected to the first port 31 and disconnected from the second port 32. The third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41. The first valve 76 of the indoor component 7 for heating is closed and the second valve 77 is open. The first valve 76 of the indoor component 7 for cooling is open and the second valve 77 is closed. In this case, the outdoor heat exchanger 5 is not started, the indoor heat exchanger 71 for heating functions as a condenser, and the indoor heat exchanger 71 for cooling functions as an evaporator, connected to the compressor 1 circuit, achieving heat circulation within the building without exchanging heat with the outside.

[0133] It can be seen that the air conditioner 10 provided in the aforementioned embodiment can realize various working modes such as overall cooling, overall heating, main cooling, main heating and cold and heat offset based on the cooperation of the first switching valve 3 and the second switching valve 4 with the first valve 76 and the second valve 77 of at least two indoor components 7. It is rich in functions, diverse in modes, flexible and practical.

[0134] Among them, since the air conditioner 10 realizes the main cooling, main heating and cold and heat offset modes, different indoor components 7 operate in different modes, one part is cooling and the other part is heating, realizing the simultaneous cooling and heating functions of the air conditioner 10. Therefore, it can effectively meet the different needs of different spaces for cooling and heating, thereby effectively improving the energy utilization rate of the air conditioner 10, reducing the energy consumption of the air conditioner 10, reducing the operating cost of the air conditioner 10, and enhancing the practicality of the air conditioner 10.

[0135] Moreover, since the condensing load and evaporation load of different spaces in the building can be utilized in the main cooling, main heating and cold and heat offset modes, the cooling load of the cooling space can provide heat for the heating space, thereby realizing heat recovery from different spaces in the building. Therefore, the flow through the outdoor side can also be reduced, and the heat exchange with the outdoor can be reduced. This is conducive to alleviating the problem of condensation in the indoor heat exchanger for cooling in winter and easy frost in the outdoor heat exchanger for heating in winter, thereby improving the operating reliability of the air conditioner 10. Specifically, in traditional air conditioners, the cooling load of the refrigeration space is completely provided by the outdoor side. During winter cooling, the outdoor temperature is low. After the refrigerant flows through the outdoor heat exchanger to release heat, it reaches a lower temperature. When it flows through the indoor unit, it is easy to form condensation on the indoor unit, damaging the indoor unit circuit and reducing human comfort. In the scheme of the aforementioned embodiment, part of the cooling load of the refrigeration space can be provided by the heating space. The temperature of the heating space is much higher than the outdoor temperature. After the refrigerant flows through the indoor heat exchanger 71 of the heating space, the temperature is higher. In this way, when it subsequently flows through the refrigeration space, the temperature is higher and condensation is not easy to form. This can reduce the risks of circuit damage and reduced comfort caused by condensation in the indoor unit, thereby improving the reliability and practicality of the unit. In addition, in traditional air conditioners, the heating space load is also completely provided by the outdoor side and a part of the electric energy. During winter heating, the outdoor temperature is low. When the refrigerant flows through the outdoor heat exchanger to absorb heat, the temperature is low, and it is easy to frost on the heat exchanger, affecting the heat exchange efficiency and increasing the energy consumption of the unit defrosting. The solution of the aforementioned embodiment fully utilizes the cooling load of the refrigeration space to provide heat for the heating space, reducing the burden on the outdoor heat exchanger. Therefore, it can effectively solve the problem of frosting of the outdoor heat exchanger, improve the heat exchange efficiency, reduce the energy consumption of defrosting, and thus improve the reliability and practicality of the unit.

[0136] It can be seen that the air conditioner 10 provided in the above embodiment has the function of providing cooling and heating at the same time, which can effectively meet the different needs of different spaces for cooling and heating. This is not only conducive to improving the energy utilization rate of the air conditioner 10 and reducing the energy consumption of the air conditioner 10, but also conducive to alleviating the problems of condensation generated by winter cooling and easy frost of the outdoor heat exchanger for winter heating, thereby improving the operating reliability of the air conditioner 10.

[0137] Furthermore, the indoor heat exchanger 71 of the air conditioner 10 provided in the aforementioned embodiment no longer utilizes a two-pipe structure, but rather a three-pipe structure. Accordingly, the three-pipe indoor heat exchanger 71 can be directly connected to the high-pressure gas pipe 61, the low-pressure gas pipe 62, and the liquid pipe 63 without requiring a converter. Therefore, without requiring a converter within the air conditioner 10, the indoor components 7 can be easily switched between cooling and heating modes, achieving the simultaneous cooling and heating functions of the air conditioner 10. The omission of the converter results in a simpler structure, easier assembly, smaller installation space, and lower equipment costs. Furthermore, during operation, there is no need to control the switching state of the converter, making control more convenient.

[0138] At the same time, the air conditioner 10 provided in the aforementioned embodiment, in addition to the first switching valve 3 and the second switching valve 4, only needs to set the first valve 76 and the second valve 77 in each indoor component 7, so as to meet the operating requirements of multiple working modes such as overall cooling, overall heating, main cooling, main heating and cold and heat offset, and realize the simultaneous cooling and heating functions, without the need to specially set valves on the high-pressure gas pipe 61 and the low-pressure gas pipe 62 and inside the converter as in the air conditioner that can simultaneously provide cooling and heating in the related art. Therefore, the number of valves can be reduced, the structure and installation process can be simplified, the installation space can be saved, and the equipment cost can be saved. Moreover, during the operation, only fewer valve switching states need to be controlled. In particular, the first valve 76 and the second valve 77 are located in the same indoor component 7 and can be synchronously controlled by the indoor component 7. There is no need for synchronous and coordinated control of the indoor unit and the converter as in the air conditioner with a converter. Therefore, it is also beneficial to simplify the control process, reduce the control difficulty, and reduce the probability of failure.

[0139] It can be seen that the aforementioned embodiment provides the first switching valve 3, the second switching valve 4 and at least two indoor components 7 including a three-pipe indoor heat exchanger 71, a first valve 76 and a second valve 77 in the air conditioner 10, and sets the connection relationship between the indoor heat exchanger 71, the first valve 76, the second valve 77, the first switching valve 3, the second switching valve 4 and the high-pressure gas pipe 61, the low-pressure gas pipe 62 and the liquid pipe 63, so that the air conditioner 10 can realize the simultaneous cooling and heating functions based on a simpler structure and a simpler control process, and conveniently meet the different cooling and heating needs of different spaces.

[0140] In the embodiment of the present application, the indoor heat exchanger 71 may be an integrated structure or a split structure.

[0141] For example, see Figure 1 and Figure 2 In some embodiments, among the at least two indoor components 7, the indoor heat exchanger 71 of at least one indoor component 7 includes a first heat exchanger 711 and a second heat exchanger 712. The first heat exchanger 711 and the second heat exchanger 712 are capable of cooling and dehumidifying and heating and reheating the indoor air, respectively. The low-pressure interface 71a is provided on the first heat exchanger 711, and the high-pressure interface 71c is provided on the second heat exchanger 712. In this case, the indoor heat exchanger 71, including the first heat exchanger 711 and the second heat exchanger 712, is a split structure.

[0142] Since the first heat exchanger 711 and the second heat exchanger 712 can cool and dehumidify and heat and reheat the indoor air respectively, the indoor heat exchanger 71 including the first heat exchanger 711 and the second heat exchanger 712 has a dehumidification and reheating function. In this way, the air conditioner 10 can not only realize overall cooling, overall heating, main cooling, main heating and cold and heat offset mode, but also realize dehumidification mode (the corresponding dehumidification mode means that the first heat exchanger 711 of the indoor heat exchanger 71 of at least one indoor component 7 cools and dehumidifies the indoor air, and the second heat exchanger 712 heats and reheats the indoor air). Therefore, the air conditioner 10 has richer functions and higher working flexibility.

[0143] Moreover, since the first heat exchanger 711 and the second heat exchanger 712 can respectively realize cooling and heating functions, the indoor heat exchanger 71 including the first heat exchanger 711 and the second heat exchanger 712 itself can realize simultaneous cooling and heating functions and perform heat recovery, so that the air conditioner 10 can not only realize simultaneous cooling and heating of different indoor components 7, but also realize simultaneous cooling and heating of the same indoor component 7, with better heat recovery effect, which is more conducive to improving energy utilization and reducing energy waste.

[0144] It can be seen that setting at least one indoor heat exchanger 71 of the air conditioner 10 as a split structure including a first heat exchanger 711 capable of cooling and dehumidifying and a second heat exchanger 712 capable of heating and reheating can effectively enrich the functions and operating modes of the air conditioner 10 and improve the heat recovery effect of the air conditioner 10.

[0145] The first heat exchanger 711 and the second heat exchanger 712 may not be connected to each other, or, alternatively, the first heat exchanger 711 and the second heat exchanger 712 may be connected to each other.

[0146] As an example in which the first heat exchanger 711 and the second heat exchanger 712 are in communication with each other, see Figure 8 The indoor heat exchanger 71, which accordingly includes the first heat exchanger 711 and the second heat exchanger 712, not only includes the first heat exchanger 711 and the second heat exchanger 712, but also includes a first connecting pipe 713, a second connecting pipe 714, a first control valve 715 and a second control valve 716. The first connecting pipe 713 and the second connecting pipe 714 are both connected between the first heat exchanger 711 and the second heat exchanger 712. The first control valve 715 and the second control valve 716 are respectively arranged on the first connecting pipe 713 and the second connecting pipe 714, and respectively control the on-off of the first connecting pipe 713 and the second connecting pipe 714 to control whether the first heat exchanger 711 and the second heat exchanger 712 are connected.

[0147] In the above scheme, the first heat exchanger 711 and the second heat exchanger 712 are connected to each other, and can be connected or disconnected with each other under the control of the first control valve 715 and the second control valve 716. When the first heat exchanger 711 and the second heat exchanger 712 are connected to each other, the two form a parallel relationship and can perform the same function, so that when the indoor heat exchanger 71 including the two is only cooling or only heating, the two can both participate in the corresponding cooling or heating process, and one will not work while the other is idle. Therefore, it is beneficial to improve equipment utilization, increase heat exchange area, and improve heat exchange efficiency; and when the first heat exchanger 711 and the second heat exchanger 712 are disconnected from each other, the two can be divided into different functions, one for dehumidification and the other for reheating, realizing the dehumidification and reheating function mentioned above.

[0148] It can be seen that by arranging the first connecting pipe 713, the second connecting pipe 714, the first control valve 715 and the second control valve 716 between the first heat exchanger 711 and the second heat exchanger 712, the operation mode of the corresponding indoor heat exchanger 71 can be further enriched, and the working flexibility of the corresponding indoor heat exchanger 71 can be improved, so that the corresponding indoor heat exchanger 71 can realize both the dehumidification and reheating functions and the efficient independent cooling or heating process.

[0149] The first control valve 715 and the second control valve 716 can adopt various structural forms. As an example, at least one of the first control valve 715 and the second control valve 716 is a solenoid valve. This not only facilitates control but also improves control accuracy, and can more efficiently and accurately control the connection or disconnection between the first heat exchanger 711 and the second heat exchanger 712.

[0150] In the aforementioned embodiments, at least one of the first valve 76 and the second valve 77 can be a throttling valve (such as an expansion valve). In this way, the first valve 76 and / or the second valve 77 not only has the function of controlling on and off, but also has a throttling function, which can better meet the operating requirements of each working mode.

[0151] In addition, as an example of the first switching valve 3 in the above embodiments, see Figure 1 The first switching valve 3 not only has a first port 31, a second port 32, and a third port 33, but also has a fourth port 34. The fourth port 34 is switchably connected to the first port 31 and the second port 32 and is closed to the outside. In this way, when one of the first port 31 and the second port 32 is connected to the third port 33, the other of the first port 31 and the second port 32 can be connected to the fourth port 34. Specifically, in some embodiments, the first switching valve 3 including the first port 31, the second port 32, the third port 33, and the fourth port 34 is a four-way valve. Since the structure and control of four-way valves are relatively mature, the first switching valve 3 is a four-way valve, which is more conducive to improving the structural reliability of the air conditioner 10 and reducing the cost of the air conditioner 10.

[0152] In addition, as an example of the second switching valve 4 in the above embodiments, see Figure 1 The second switching valve 4 not only has a first valve port 41, a second valve port 42, and a third valve port 43, but also has a fourth valve port 44. The fourth valve port 44 is switched to communicate with the first valve port 41 and the second valve port 42 and is cut off from the outside. In this way, when one of the first valve port 41 and the second valve port 42 is connected to the third valve port 43, the other of the first valve port 41 and the second valve port 42 can be connected to the fourth valve port 44. Specifically, in some embodiments, the second switching valve 4 including the first valve port 41, the second valve port 42, the third valve port 43, and the fourth valve port 44 is a four-way valve. Since the structure and control of the four-way valve are relatively mature, the second switching valve 4 is a four-way valve, which is more conducive to improving the structural reliability of the air conditioner 10 and reducing the cost of the air conditioner 10.

[0153] Continue to see Figure 1 As an example of the air conditioner 10 in the aforementioned embodiments, the air conditioner 10 also includes at least one of a regulating valve 64, a first on-off valve 65, a second on-off valve 66, a third on-off valve 67, a high-pressure sensor 81 and a low-pressure sensor 82.

[0154] Among them, the regulating valve 64 is set on the liquid pipe 63 to throttle the refrigerant flowing through the liquid pipe 63. In this way, the throttling requirements during heating can be better met, so that the refrigerant flowing out of the indoor heat exchanger 71 can flow into the outdoor heat exchanger 5 after throttling to absorb heat.

[0155] A first on-off valve 65 is provided on the high-pressure gas pipe 61 to control the on / off of the high-pressure gas pipe 61. This valve can be used to disconnect the high-pressure gas pipe 61 when the entire machine needs to be shut down, further improving reliability when the machine is shut down. During normal operation, the first on-off valve 65 can remain open.

[0156] A second on-off valve 66 is installed on the low-pressure air pipe 62 to control the on / off of the low-pressure air pipe 62. This valve can be used to disconnect the low-pressure air pipe 62 when the entire machine needs to be shut down, further improving the reliability of the entire machine when shut down. During operation, the second on-off valve 66 can remain open at all times.

[0157] A third on-off valve 67 is provided on the liquid pipe 63 to control the on / off operation of the liquid pipe 63. This valve can be used to disconnect the liquid pipe 63 when the entire machine needs to be shut down, further improving the reliability of the entire machine when shut down. During operation, the third on-off valve 67 can remain open at all times.

[0158] High-pressure sensor 81 is disposed on the pipeline between the exhaust port 11 of compressor 1 and switching device 101, for example, on the pipeline between the exhaust port 11 of compressor 1 and the first port 31 and first valve port 41 of switching device 101, to detect high pressure. The corresponding high-pressure detection result can be used as a basis for adjusting the frequency of compressor 1, thereby facilitating frequency adjustment of compressor 1 during operation of air conditioner 10.

[0159] Low-pressure sensor 82 is disposed on the pipeline between compressor 1's intake port 12 and switching device 101, for example, between compressor 1's exhaust port 11 and the second port 32 and second valve port 42 of switching device 101, to detect low pressure. The low-pressure detection result can be used as a basis for adjusting the frequency of compressor 1, thereby facilitating frequency adjustment during operation of air conditioner 10.

[0160] Based on the air conditioner 10 of the aforementioned embodiments, the present application further provides a control method for the air conditioner 10 .

[0161] Figure 9 The process of the control method of the air conditioner 10 is exemplarily shown.

[0162] See also Figure 9 In an embodiment of the present application, the control method of the air conditioner 10 includes:

[0163] S100, determining a target operating mode of the air conditioner 10;

[0164] S200 , according to the determined target operating mode, controlling the switching device 101 and the regulating device 78 so that the air conditioner 10 operates in the target operating mode.

[0165] Specifically, the target operating mode is any one of the whole cooling, whole heating, main cooling, main heating, and cooling and heating offset modes, and according to the determined target operating mode, controlling the switching device 101 and the control device 78 includes at least one of the following:

[0166] When the determined target operating mode is the overall cooling mode, the control switching device 101 connects the second end of the outdoor heat exchanger 5 to the exhaust port 11 of the compressor 1, and connects the low-pressure gas pipe 62 to the intake port 12 of the compressor 1. The control device 78 of each indoor component 7 is controlled to connect and disconnect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63, respectively.

[0167] When the determined target operating mode is the full-heating mode, the control switching device 101 connects the high-pressure gas pipe 61 and the low-pressure gas pipe 62 to the exhaust port 11 of the compressor 1, connects the second end of the outdoor heat exchanger 5 to the intake port 12 of the compressor 1, and controls the control device 78 of each indoor component 7 to connect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 to the liquid pipe 63;

[0168] When the determined target operating mode is the main cooling mode, the control switching device 101 connects the high-pressure gas pipe 61 and the second end of the outdoor heat exchanger 5 to the exhaust port 11 of the compressor 1, and connects the low-pressure gas pipe 62 to the intake port 12 of the compressor 1. The control device 78 of the indoor component 7 performing cooling is controlled to connect and disconnect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 with the liquid pipe 63, respectively, while the control device 78 of the indoor component 7 performing heating is controlled to disconnect and connect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 with the liquid pipe 63, respectively.

[0169] When the determined target operating mode is the main heating mode, the switching device 101 is controlled to connect the high-pressure gas pipe 61 with the exhaust port 11 of the compressor 1, and to connect the low-pressure gas pipe 62 and the second end of the outdoor heat exchanger 5 with the intake port 12 of the compressor 1. The regulating device 78 of the indoor component 7 performing cooling is controlled to connect and disconnect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 with the liquid pipe 63, respectively, while the regulating device 78 of the indoor component 7 performing heating is controlled to connect and disconnect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 with the liquid pipe 63, respectively.

[0170] When the determined target operating mode is the cold and heat offset mode, the control switching device 101 connects the high-pressure air pipe 61 with the exhaust port 11 of the compressor 1, connects the low-pressure air pipe 62 with the intake port 12 of the compressor 1, and disconnects the second end of the outdoor heat exchanger 5 from both the intake port 12 and the exhaust port 11 of the compressor 1, and controls the control device 78 of the indoor component 7 for cooling to connect and disconnect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 with the liquid pipe 63 respectively, and controls the control device 78 of the indoor component 7 for heating to disconnect and connect the low-pressure interface 71a and the high-pressure interface 71c of the corresponding indoor heat exchanger 71 with the liquid pipe 63 respectively.

[0171] More specifically, in an embodiment where the switching device 101 includes the first switching valve 3 and the second switching valve 4, and the control device 78 includes the first valve 76 and the second valve 77, the target operating mode is any one of the overall cooling mode, the overall heating mode, the main cooling mode, the main heating mode, and the cooling and heating offset mode, and, based on the determined target operating mode, controlling the switching device 101 and the control device 78 includes at least one of the following:

[0172] When the determined target operating mode is the overall cooling mode, the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the first port 31 and disconnected from the second port 32, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of the control device 78 of each indoor component 7 is opened and the second valve 77 is closed;

[0173] When the determined target operating mode is the full-body heating mode, the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the second port 32 and disconnected from the first port 31, the third valve port 43 of the second switching valve 4 is connected to the first valve port 41 and disconnected from the second valve port 42, and the first valve 76 and the second valve 77 of the control device 78 of each indoor component 7 are both open;

[0174] When the determined target operating mode is the main cooling mode, the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the first port 31 and disconnected from the second port 32, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of the control device 78 of the indoor component 7 performing heating is closed and the second valve 77 is opened, while the first valve 76 of the control device 78 of the indoor component 7 performing cooling is opened and the second valve 77 is closed;

[0175] When the determined target operating mode is the main heating mode, the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the second port 32 and disconnected from the first port 31, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of the control device 78 of the indoor component 7 performing heating is closed and the second valve 77 is opened, and the first valve 76 of the control device 78 of the indoor component 7 performing cooling is opened and the second valve 77 is closed;

[0176] When the determined target operating mode is the cold and heat offset mode, the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the first port 31 and disconnected from the second port 32, the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, and the first valve 76 of the control device 78 of the indoor component 7 for heating is closed and the second valve 77 is opened, and the first valve 76 of the control device 78 of the indoor component 7 for cooling is opened and the second valve 77 is closed.

[0177] In addition, in some embodiments, the target operating mode is a dehumidification mode, and controlling the switching device 101 and the regulating device 78 according to the determined target operating mode includes:

[0178] The control device 78 of the indoor component 7 for dehumidification connects the low-pressure interface 71a and the high-pressure interface 71c to the liquid pipe 63, and controls the switching device 101 to connect the high-pressure air pipe 61 and the second end of the outdoor heat exchanger 5 to the exhaust port 11 of the compressor 1, and connects the low-pressure air pipe 62 to the intake port 12 of the compressor 1, or controls the switching device 101 to connect the high-pressure air pipe 61 to the exhaust port 11 of the compressor 1, and connects the low-pressure air pipe 62 and the second end of the outdoor heat exchanger 5 to the intake port 12 of the compressor 1.

[0179] Specifically, in an embodiment where the switching device 101 includes the first switching valve 3 and the second switching valve 4, and the control device 78 includes the first valve 76 and the second valve 77, the target operating mode is the dehumidification mode, and according to the determined target operating mode, controlling the switching device 101 and the control device 78 includes:

[0180] The first valve 76 and the second valve 77 of the control device 78 of the indoor component 7 for controlling dehumidification are both opened, and the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the first port 31 and disconnected from the second port 32, and the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41, or the third port 33 of the first switching valve 3 of the control switching device 101 is connected to the second port 32 and disconnected from the first port 31, and the third valve port 43 of the second switching valve 4 is connected to the second valve port 42 and disconnected from the first valve port 41.

[0181] In addition, when the indoor heat exchanger 71 includes a first control valve 715 and a second control valve 716 as described above, in the process of controlling the switching device 101 and the regulating device 78 according to the determined target operating mode, the first control valve 715 and the second control valve 716 of the indoor component 7 can also be controlled.

[0182] Specifically, in some embodiments, controlling the first control valve 715 and the second control valve 716 of the indoor component 7 includes at least one of the following:

[0183] For the indoor heat exchanger 71 performing dehumidification, the first control valve 715 and the second control valve 716 are controlled to be closed, so that the first heat exchanger 711 and the second heat exchanger 712 are disconnected, respectively performing different functions to meet the needs of dehumidification and reheating;

[0184] For the indoor heat exchanger 71 that only performs cooling or heating, the first control valve 715 and the second control valve 716 are controlled to open so that the first heat exchanger 711 and the second heat exchanger 712 are connected in parallel, performing the same function and participating in the cooling or heating process of the same indoor heat exchanger 71 at the same time, thereby increasing the heat exchange area, improving the heat exchange efficiency, reducing idleness, and improving component utilization.

[0185] The control methods of the above embodiments can be completed under the control of the controller 9. Therefore, the present application also provides a controller 9 and an air conditioning system including the controller 9 and the air conditioner 10 of any embodiment of the present application.

[0186] Figure 10 The structure of the controller 9 is shown as an example.

[0187] See also Figure 10 In an embodiment of the present application, the controller 9 includes a memory 91 and a processor 92 coupled to the memory 91, and the processor 92 is configured to execute a control method such as any embodiment of the present application based on instructions stored in the memory 91.

[0188] Specifically, if Figure 10 As shown, in some embodiments, the controller 9 includes a memory 91, a processor 92, a communication interface 93, and a bus 94. The memory 91 is used to store instructions. The processor 92 is coupled to the memory 91 and is configured to execute the control methods of various embodiments of the present invention based on the instructions stored in the memory 91. The memory 91, the processor 92, and the communication interface 93 are connected via a bus 94.

[0189] Memory 91 can be high-speed RAM or non-volatile memory, for example. Memory 91 can also be a memory array. Memory 91 can also be divided into blocks, and the blocks can be combined into virtual volumes according to certain rules. Processor 92 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), or one or more integrated circuits configured to implement the control method of the present invention.

[0190] In addition, the present application also provides a computer-readable storage medium, which stores computer instructions, and the computer instructions are executed by a processor to execute the control method of any embodiment of the present application.

[0191] Next, combine Figures 1-8 The illustrated embodiments further illustrate the present application.

[0192] First, introduction Figure 1-Figure 7 The embodiment shown.

[0193] like Figure 1-Figure 7As shown, in this embodiment, the air conditioner 10 includes an outdoor unit and two indoor units 7. The outdoor unit includes a compressor 1, an oil separator 21, a steam separator 22, a first switching valve 3, a second switching valve 4, an outdoor heat exchanger 5, a high-pressure gas pipe 61, a low-pressure gas pipe 62, a liquid pipe 63, a control valve 64, a first on-off valve 65, a second on-off valve 66, a third on-off valve 67, a high-pressure sensor 81, and a low-pressure sensor 82.

[0194] The compressor 1 is used to compress the refrigerant and has an exhaust port 11 and an intake port 12. Figure 1 As shown, in this embodiment, the exhaust port 11 is connected to the first switching valve 3, the second switching valve 4, and the high-pressure gas pipe 61 via the oil separator 21; the intake port 12 is connected to the first switching valve 3 and the second switching valve 4 via the steam separator 22. A high-pressure sensor 81 is installed on the pipeline between the oil separator 21 and the first port 31 of the first switching valve 3, the first valve port 41 of the second switching valve 4, and the high-pressure gas pipe 61 to detect the pressure of the high-pressure gaseous refrigerant flowing out of the compressor 1, that is, to perform high-pressure detection. A low-pressure sensor 82 is installed on the pipeline between the steam separator 22 and the third port 33 of the first switching valve 3 and the third valve port 43 of the second switching valve 4 to detect the pressure of the low-pressure gaseous refrigerant flowing back into the compressor 1, that is, to perform low-pressure detection.

[0195] The first switching valve 3 and the second switching valve 4 are used to control the flow direction of the refrigerant. Figure 1 As shown, in this embodiment, the first switching valve 3 and the second switching valve 4 are both four-way valves.

[0196] Specifically, the first switching valve 3 has a first port 31, a second port 32, a third port 33, and a fourth port 34. The connection relationship between the first port 31, the second port 32, the third port 33, and the fourth port 34 is such that the third port 33 and the fourth port 34 are switchedly connected to the first port 31 and the second port 32, and when the third port 33 is connected to one of the first port 31 and the second port 32, the fourth port 34 is connected to the other of the first port 31 and the second port 32. Externally, the first port 31 is connected to the exhaust port 11 of the compressor 1 and the high-pressure gas pipe 61; the second port 32 is connected to the intake port 12 of the compressor 1 through the steam separator 22; the third port 33 is connected to the second end of the outdoor heat exchanger 5; and the fourth port 34 is closed to the outside and is not connected to the compressor 1 or the outdoor heat exchanger 5.

[0197] The second switching valve 4 has a first valve port 41, a second valve port 42, a third valve port 43, and a fourth valve port 44. The connections between the first valve port 41, the second valve port 42, the third valve port 43, and the fourth valve port 44 are such that the third valve port 43 and the fourth valve port 44 are switchedly connected to the first valve port 41 and the second valve port 42. When the third valve port 43 is connected to one of the first valve port 41 and the second valve port 42, the fourth valve port 44 is connected to the other of the first valve port 41 and the second valve port 42. Externally, the first valve port 41 is connected to the exhaust port 11 of the compressor 1 and the high-pressure gas pipe 61; the second valve port 42 is connected to the intake port 12 of the compressor 1 via the steam separator 22; the third valve port 43 is connected to the low-pressure gas pipe 62; and the fourth valve port 44 is blocked externally and is not connected to the compressor 1 or the outdoor heat exchanger 5.

[0198] Based on the above settings, the first switching valve 3 can control the on-off relationship between the high-pressure air pipe 61 and the outdoor heat exchanger 5 and the exhaust port 11 and the intake port 12 of the compressor 1, and the second switching valve 4 can control the on-off relationship between the high-pressure air pipe 61 and the low-pressure air pipe 62 and the exhaust port 11 and the intake port 12 of the compressor 1. In addition, the first switching valve 3 and the second switching valve 4 together can control the flow direction of the refrigerant according to the load of the entire indoor system (in this embodiment, the two indoor components 7) (for example, which one of the cooling load and the heating load is larger).

[0199] The high-pressure gas pipe 61, the low-pressure gas pipe 62 and the liquid pipe 63 are used to respectively pass the high-pressure gaseous refrigerant, the low-pressure gaseous refrigerant and the liquid refrigerant, and the three together realize the connection between the indoor system and the outdoor unit. Figure 1 As shown, in this embodiment, the high-pressure gas pipe 61 is connected to the first port 31 of the first switching valve 3, the first valve port 41 of the second switching valve 4, and the oil separator 21, and is connected to both indoor components 7; the low-pressure gas pipe 62 is connected to the third valve port 43 of the second switching valve 4, and is connected to both indoor components 7; the liquid pipe 63 is connected to the first end of the outdoor heat exchanger 5, and is connected to both indoor components 7.

[0200] The high-pressure gas pipe 61, the low-pressure gas pipe 62, and the liquid pipe 63 are respectively provided with a first on-off valve 65, a second on-off valve 66, and a third on-off valve 67. These valves are used to control the disconnection of the high-pressure gas pipe 61, the low-pressure gas pipe 62, and the liquid pipe 63 when shutdown is required, preventing leakage and improving shutdown safety. Furthermore, a control valve 64 is also provided on the liquid pipe 63 to implement a heating throttling function. In this embodiment, the control valve 64 is an expansion valve, specifically an electronic expansion valve, more specifically a heating electronic expansion valve, which is used to throttle during heating, allowing the refrigerant flowing out of the indoor system to flow into the outdoor heat exchanger 5 after throttling to absorb heat. The corresponding control valve 64 acts as a throttling function under heating conditions and is fully open under cooling conditions.

[0201] Two indoor assemblies 7 are installed in different rooms and connected in parallel to form an indoor system. In this embodiment, the two indoor assemblies 7 have identical structures, including an indoor heat exchanger 71, a low-pressure connecting pipe 72, a high-pressure connecting pipe 73, a first branch pipe 74, a second branch pipe 75, a first valve 76, and a second valve 77.

[0202] The indoor heat exchanger 71 includes a first heat exchanger 711 and a second heat exchanger 712. The first heat exchanger 711 and the second heat exchanger 712 are independent and not interconnected, and are used to cool and dehumidify the indoor air and reheat it after dehumidification, respectively. Specifically, a low-temperature refrigerant circulates through the first heat exchanger 711 to cool the indoor air, causing some of the water vapor in the indoor air to condense and precipitate as condensed water (i.e., condensation), thereby achieving the purpose of dehumidification. A high-temperature refrigerant circulates through the second heat exchanger 712 to heat the indoor air. During operation, the indoor air flows through the first heat exchanger 711, cooling and dehumidifying it, and then passes through the second heat exchanger 712 to be reheated. In this way, the indoor heat exchanger 71 performs dehumidification and reheating functions.

[0203] Figure 2 The structure of the indoor heat exchanger 71 is further shown. Figure 2 As shown in FIG. 1 , in this embodiment, the first heat exchanger 711 is provided with a low-pressure interface 71a and a first liquid pipe interface 71b that are interconnected, and the second heat exchanger 712 is provided with a high-pressure interface 71c and a second liquid pipe interface 71d that are interconnected. Figure 1 As shown, in this embodiment, the low-pressure interface 71a and the first liquid pipe interface 71b are connected to the low-pressure gas pipe 62 and the liquid pipe 63 respectively through the low-pressure connecting pipe 72 and the first branch pipe 74, while the high-pressure interface 71c and the second liquid pipe interface 71d are connected to the high-pressure gas pipe 61 and the liquid pipe 63 respectively through the high-pressure connecting pipe 73 and the second branch pipe 75. In this way, the first heat exchanger 711 is connected to the low-pressure gas pipe 62 and the liquid pipe 63, and the second heat exchanger 712 is connected to the high-pressure gas pipe 61 and the liquid pipe 63.

[0204] The low-pressure connecting pipe 72, the high-pressure connecting pipe 73, the first branch pipe 74, and the second branch pipe 75 are respectively used to connect the indoor heat exchanger 71 with the low-pressure gas pipe 62, the high-pressure gas pipe 61, and the liquid pipe 63. Specifically, in this embodiment, the low-pressure connecting pipe 72 is connected between the low-pressure interface 71a and the low-pressure gas pipe 62 to connect the first heat exchanger 711 with the low-pressure gas pipe 62; the high-pressure connecting pipe 73 is connected between the high-pressure interface 71c and the high-pressure gas pipe 61 to connect the second heat exchanger 712 with the high-pressure gas pipe 61; the first branch pipe 74 is connected between the first liquid pipe interface 71b and the liquid pipe 63 to connect the first heat exchanger 711 with the liquid pipe 63; and the second branch pipe 75 is connected between the second liquid pipe interface 71d and the liquid pipe 63 to connect the second heat exchanger 712 with the liquid pipe 63.

[0205] The first valve 76 and the second valve 77 are both electronic expansion valves, which are respectively installed on the first branch pipe 74 (i.e., the pipeline between the first liquid pipe interface 71b and the liquid pipe 63) and the second branch pipe 75 (i.e., the pipeline between the second liquid pipe interface 71d and the liquid pipe 63). They not only control the opening and closing of the first branch pipe 74 and the second branch pipe 75, but also can change the opening degree to play a throttling role.

[0206] Based on the above configuration, the air conditioner includes two indoor heat exchangers 71, each of which is a three-pipe heat exchanger with dehumidification and reheating functions. Each indoor heat exchanger 71 can be connected to the high-pressure gas pipe 61 and the low-pressure gas pipe 62 without a converter. Furthermore, each indoor heat exchanger 71 is connected to the liquid pipe 63 via a first branch pipe 74 and a second branch pipe 75. A first valve 76 on the first branch pipe 74 and a second valve 77 on the second branch pipe 75 control the connection with the liquid pipe 63. This, in turn, controls whether the indoor heat exchanger 71 is connected to the high-pressure gas pipe 61 and the low-pressure gas pipe 62, and whether the indoor unit 7 is cooling or heating. The first valve 76 and the second valve 77 are switched on and off depending on whether the room where the corresponding indoor unit 7 is located requires cooling or heating. When the room requires cooling, the first valve 76 opens and throttles the flow, while the second valve 77 closes. When the room requires heating, the second valve 77 opens.

[0207] In summary, the outdoor unit of the air conditioner 10 of this embodiment is connected to two indoor components 7 via a liquid pipe 63 and two air pipes, one low and one high (i.e., a high-pressure air pipe 61 and a low-pressure air pipe 62). Both indoor components 7 include a three-pipe indoor heat exchanger 71 with a dehumidification and reheating function. The connection and disconnection relationship between the three-pipe indoor heat exchanger 71 with a dehumidification and reheating function and the liquid pipe 63, the high-pressure air pipe 61, and the low-pressure air pipe 62 is controlled by a first valve 76 and a second valve 77. The connection relationship between the liquid pipe 63, the high-pressure air pipe 61, and the low-pressure air pipe 62 and the compressor 1 and the outdoor heat exchanger 5 is controlled by a first switching valve 3 and a second switching valve 2.

[0208] Based on the above-mentioned structural setting, each indoor component 7 can be flexibly switched between cooling and heating modes independently without being restricted by other indoor components 7, so that the air conditioner 10 can not only operate in cooling mode or heating mode as a whole, but also can operate in cooling mode in part and heating mode in part, realizing simultaneous cooling and heating functions to meet the different needs of different rooms for cooling and heating. Moreover, the corresponding air conditioner 10 does not need to be equipped with a converter, and the number of valves is also relatively small. Therefore, the structure is simple and the control is convenient.

[0209] Among them, it is only necessary to control the states of the first switching valve 3, the second switching valve 4 and the first valve 76 and the second valve 77 of each indoor component 7 to control the two indoor components 7 to flexibly switch between cooling and heating modes, so that the air conditioner 10 can flexibly switch between overall cooling, overall heating, main cooling, main heating and cold and heat offset modes.

[0210] For each indoor component 7, its cooling or heating process is combined with Figure 3 and Figure 4 Provide explanation.

[0211] Reference Figure 3 During cooling, the states of the first switching valve 3, the second switching valve 4, the first valve 76, and the second valve 77 are as follows: the second port 32 and the fourth port 34 of the first switching valve 3 are connected, and the first port 31 and the third port 33 are connected, so that the exhaust port 11 of the compressor 1 is connected to the outdoor heat exchanger 5; the first valve port 41 and the fourth valve port 44 of the second switching valve 4 are connected, and the second valve port 42 and the third valve port 43 are connected, so that the low-pressure gas pipe 62 is connected to the steam separator 22, and further the low-pressure gas pipe 62 is connected to the intake port 12 of the compressor 1; The first valve 76 opens, enabling the low-pressure gas pipe 62 to function. The liquid pipe 63, indoor heat exchanger 71, and the flow path along the low-pressure gas pipe 62 participate in the circulation. Furthermore, the opening of the first valve 76 is adjusted based on the inlet and outlet temperature difference of the indoor component 7 to implement refrigeration throttling. The second valve 77 is fully closed, disabling the high-pressure gas pipe 61. This prevents high-pressure steam from the compressor 1 outlet from directly connecting to the indoor component 7 through the high-pressure gas pipe 61, potentially affecting refrigeration and overall system safety. In this case, the indoor heat exchanger 71 acts as an evaporator. The exhaust gas from compressor 1 flows through the first switching valve 3 to the outdoor heat exchanger 5, then through the fully open control valve 64 into the liquid pipe 63. After being throttled by the first valve 76, it absorbs indoor heat in the indoor heat exchanger 71, transforming into a gaseous refrigerant. This refrigerant then flows through the low-pressure gas pipe 62, the second switching valve 4, and the vapor separator 22, ultimately returning to the compressor 1, completing a refrigeration cycle.

[0212] Reference Figure 4During heating, the states of the first switching valve 3, the second switching valve 4, the first valve 76 and the second valve 77 are as follows: the first port 31 of the first switching valve 3 is connected to the fourth port 34, and the second port 32 is connected to the third port 33, so as to connect the suction port 12 of the compressor 1 with the outdoor heat exchanger 5; the second valve port 42 of the second switching valve 4 is connected to the fourth valve port 44, and the first valve port 41 is connected to the third valve port 43, so as to connect the low-pressure gas pipe 62 with the oil separator 21, and then connect the low-pressure gas pipe 62 with the exhaust port 11 of the compressor 1; the first valve 76 is fully opened, so that the low-pressure gas pipe 62 is activated, and the liquid pipe 63, the indoor heat exchanger 71 and the flow path where the low-pressure gas pipe 62 is located participate in the circulation; the second valve 77 is fully opened, so that the high-pressure gas pipe 61 is activated, and the liquid pipe 63, the indoor heat exchanger 71 and the flow path where the high-pressure gas pipe 61 is located also participate in the circulation. In this case, the indoor heat exchanger 71 acts as a condenser. Part of the exhaust gas from the compressor 1 enters the indoor heat exchanger 71 directly through the high-pressure gas pipe 61, and the other part enters the low-pressure gas pipe 62 through the second switching valve 4 and flows into the indoor heat exchanger 71. After the heat exchange is completed, the two parts of the gaseous refrigerant become liquid and merge into the liquid pipe 63. After being throttled by the control valve 64, they flow into the outdoor heat exchanger 5 to absorb heat, flow into the steam separator 22 through the first switching valve 3, and finally return to the compressor 1, completing a heating cycle. In the corresponding process, the high-pressure gaseous refrigerant flowing out of the compressor 1 is divided into two paths and enters the indoor heat exchanger 71 in parallel. On the one hand, it can fully utilize the high and low pressure gas pipes to avoid the waste caused by idleness of one of the gas pipes. On the other hand, it can also reduce pipeline resistance, reduce energy waste, increase refrigerant flow, and improve heat exchange efficiency.

[0213] Based on the free switching between cooling and heating modes of each indoor component 7, the indoor components 7 of the air conditioner 10 are no longer limited to running in the same mode at the same time, but can run in the same or different modes at the same time, realizing multiple modes such as overall cooling, overall heating, main cooling, main heating, and cold and hot offset mode, and meeting the cooling and heating needs of different rooms at the same time. Among them, the states of the air conditioner 10 in the overall cooling, overall heating, main cooling, main heating, and cold and hot offset modes are respectively as follows: Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 shown.

[0214] like Figure 3 As shown, in the general cooling mode, all rooms need to be cooled. The first port 31 of the first switching valve 3 is connected to the third port 33, the second port 32 is connected to the fourth port 34, the first valve port 41 of the second switching valve 4 is connected to the fourth valve port 44, the second valve port 42 and the third valve port 43 are connected, and the first valves 76 of the two indoor components 7 are open and the second valves 77 are closed. In this case, the high-pressure gas pipe 61 is not activated, and all indoor heat exchangers 71 are used as evaporators. Figure 3As shown by the arrows, the exhaust gas from the compressor 1 flows through the first port 31 and the third port 33 of the first switching valve 3, passes through the outdoor heat exchanger 5, enters the liquid pipe 63, flows through the fully-open regulating valve 64, and then flows through the first valve 76 of each indoor component 7, enters each indoor heat exchanger 71, absorbs indoor heat at the indoor heat exchanger 71, and turns into a gaseous condenser. Then, it flows through the low-pressure gas pipe 62 and the third valve port 43 and the second valve port 42 of the second switching valve 4, flows into the steam separator 22, and finally returns to the compressor 1, completing a refrigeration cycle.

[0215] like Figure 4 As shown, in the full heating mode, all rooms need to be heated, the first port 31 of the first switching valve 3 is connected to the fourth port 34, the third port 33 is connected to the second port 32, the first valve port 41 of the second switching valve 4 is connected to the third valve port 43, the second valve port 42 is connected to the fourth valve port 44, and the first valve 76 and the second valve 77 of each indoor component 7 are open. In this case, the high-pressure gas pipe 61 and the low-pressure gas pipe 62 are both enabled, all indoor heat exchangers 71 are used as condensers, and, as shown in FIG. Figure 4 As shown by the arrows, part of the exhaust gas of the compressor 1 directly enters each indoor heat exchanger 71 through the high-pressure gas pipe 61, and the other part enters the low-pressure gas pipe 62 through the first valve port 41 and the third valve port 43 of the second switching valve 4, and flows into each indoor heat exchanger 71. The two parts of the refrigerant entering the indoor heat exchanger 71 change from gas to liquid after the heat exchange is completed at the indoor heat exchanger 71, converge into the liquid pipe 63, and after throttling by the regulating valve 64, flow into the outdoor heat exchanger 5 to absorb heat, and then flow through the third port 33 and the second port 32 of the first switching valve 3, flow to the steam separator 22, and finally flow back to the compressor 1, completing a heating cycle.

[0216] like Figure 5 As shown, in the main cooling mode, some rooms need to be heated, some rooms need to be cooled, and the cooling demand occupies the main part. At this time, the first port 31 of the first switching valve 3 is connected to the third port 33, the second port 32 is connected to the fourth port 34, the first valve port 41 of the second switching valve 4 is connected to the fourth valve port 44, the second valve port 42 is connected to the third valve port 43, and the indoor component 7 ( Figure 5 Specifically, the first valve 76 of the indoor component 7 on the right is closed, and the second valve 77 is fully opened, and the indoor component 7 ( Figure 5 Specifically, the first valve 76 of the indoor unit 7 on the left is opened and the opening is adjusted according to the inlet and outlet temperatures of the corresponding indoor unit 7, and the second valve 77 is closed. In this case, the outdoor heat exchanger 5 acts as a condenser, the indoor heat exchanger 71 of the room to be heated acts as a condenser, and the indoor heat exchanger 71 of the room to be cooled acts as an evaporator, and as Figure 5 As shown by the arrow, the refrigerant is in the indoor component 7 (for example Figure 5After releasing heat at the indoor heat exchanger 71 of the indoor component 7 on the right side of the middle, the heat flows into the liquid pipe 63 through the second valve 77 of the corresponding indoor component 7, and then passes through the indoor component 7 for cooling (for example Figure 5 After passing through the first valve 76 of the indoor component 7 on the left side of the middle, the refrigerant enters the indoor heat exchanger 71 of the corresponding indoor component 7, absorbs heat, and then enters the low-pressure gas pipe 62, then flows through the third valve port 43 and the second valve port 42 of the second switching valve 4, flows to the steam separator 22, and returns to the compressor 1. After being compressed by the compressor 1, it forms high-pressure gas. Part of the high-pressure gas does not pass through the first switching valve 3 and the second switching valve 4, and directly returns to the indoor component 7 for heating through the high-pressure gas pipe 61, completing a refrigeration cycle, realizing heat transfer from the cooling space to the heating space, so that the total cooling and heating load of the building is partially offset, and the remaining refrigerant flows through the first port 31 and the third port 33 of the first switching valve 3 to the outdoor heat exchanger 5. The outdoor heat exchanger 5 acts as a condenser and bears the excess cooling load of the building. After completing the heat exchange with the outdoor heat exchanger 5, the refrigerant enters the indoor component 7 for cooling through the liquid pipe 63 and the fully opened control valve 64 to absorb heat, and then returns to the compressor 1 through the second switching valve 4. During this process, the room requiring cooling transfers heat to the room requiring heating, with the cooling and heating loads offsetting each other, resulting in self-sufficiency. The excess cooling load is borne by the outdoor heat exchanger 5. Throughout the entire operation, the control valve 64 is fully open, and the frequency of the compressor 1 is adjusted based on the low-pressure pressure. In other words, the frequency of the compressor 1 is adjusted based on the low-pressure side pressure of the compressor 1 as monitored by the low-pressure sensor 82. If the low-pressure is lower than the set pressure, the frequency of the compressor 1 is reduced, while if the low pressure is higher than the set pressure, the frequency of the compressor 1 is increased.

[0217] like Figure 6 As shown, in the main heating mode, some rooms need to be heated, some rooms need to be cooled, and the heating demand occupies the main position. At this time, the first port 31 of the first switching valve 3 is connected to the fourth port 34, the second port 32 is connected to the third port 33, the first valve port 41 of the second switching valve 4 is connected to the fourth valve port 44, the second valve port 42 is connected to the third valve port 43, and the indoor component 7 of the room to be heated ( Figure 6 The first valve 76 of the indoor component 7 on the right side of the middle is closed, and the second valve 77 is fully opened. The indoor component 7 of the room to be cooled ( Figure 6 The first valve 76 of the indoor component 7 on the left side is opened and the opening degree is adjusted according to the inlet and outlet temperatures of the corresponding indoor component 7, and the second valve 77 is closed. In this case, the outdoor heat exchanger 5 acts as an evaporator, the indoor heat exchanger 71 for heating acts as a condenser, and the indoor heat exchanger 71 for cooling acts as an evaporator, and as shown in FIG. Figure 6 As shown by the arrow, the exhaust gas of the compressor 1 does not pass through the first switching valve 3 and the second switching valve 4, but directly enters the indoor heating component 7 through the high-pressure gas pipe 61 ( Figure 6Indoor component 7 on the right side), after the heat release is completed at the indoor heat exchanger 71 of the corresponding indoor component 7, it is divided into two parts, one part flows to the indoor component 7 for cooling ( Figure 6 The indoor component 7 on the left side of the center absorbs heat at the indoor heat exchanger 71 of the corresponding indoor component 7 being cooled. It then flows through the low-pressure gas pipe 62 and the third and second valve ports 43 and 42 of the second switching valve 4 to the vapor separator 22 and back to the compressor 1. This portion of the refrigerant offsets the cooling and heating loads within the building. The remaining portion of the refrigerant, after throttling through the liquid pipe 63 and the control valve 64, flows to the outdoor heat exchanger 5, absorbs heat outdoors, and ultimately flows through the third and second ports 33 and 32 of the first switching valve 3 to the vapor separator 22 and back to the compressor 1. This portion of the heat load is borne by the outdoor heat exchanger 5. In this process, the room requiring cooling transfers heat to the room requiring heating, offsetting the cooling and heating loads in a self-sufficient manner. The excess heat load is borne by the outdoor heat exchanger 5. During the entire operation process, the control valve 64 is opened for throttling, and the frequency of the compressor 1 is adjusted according to the high-pressure pressure. That is, the frequency of the compressor 1 is adjusted based on the high-pressure side pressure of the compressor 1 monitored by the high-pressure sensor 81. If the high pressure is lower than the set pressure, the frequency of the compressor 1 is increased, and if the high pressure is higher than the set pressure, the frequency of the compressor 1 is reduced.

[0218] like Figure 7 As shown, in the heat-cold offset mode, some rooms require heating, while others require cooling, with the cooling capacity and heating capacity roughly equal. At this point, the outdoor heat exchanger 5 is closed, the first port 31 of the first switching valve 3 is connected to the third port 33, the second port 32 is connected to the fourth port 34, the first valve port 41 of the second switching valve 4 is connected to the fourth valve port 44, and the second valve port 42 is connected to the third valve port 43. Furthermore, the first valve 76 of the indoor component 7 in the room requiring heating is closed, and the second valve 77 is open. The first valve 76 of the indoor component 7 in the room requiring cooling is open, and the second valve 77 is closed. In this case, the outdoor heat exchanger 5 is not activated, the indoor heat exchanger 71 for heating functions as a condenser, and the indoor heat exchanger 71 for cooling functions as an evaporator, connecting to the compressor 1 to form a loop, achieving heat circulation within the building without exchanging heat with the outside.

[0219] It can be seen that the air conditioner 10 of this embodiment only needs to control the states of two four-way valves (i.e., the first switching valve 3 and the second switching valve 4) and two sets of indoor expansion valves (i.e., the first valve 76 and the second valve 77 of the two indoor components 7) to achieve independent and free control of cooling and heating of a single room, as well as simultaneous cooling and heating of different rooms. This allows the air conditioner 10 to freely and flexibly switch between multiple working modes, namely, overall cooling, overall heating, main cooling, main heating, and cold and heat offset, effectively improving the applicability of the air conditioner 10 and reducing the equipment and control operating costs of the air conditioner 10.

[0220] Among them, in the main cooling and main heating modes, the condensing load and evaporation load of different rooms can be fully utilized to offset each other, reduce heat exchange with the outdoors, greatly reduce energy consumption, and improve energy utilization. In addition, the outdoor heat exchanger serves as a buffer device to balance the cooling and heating loads of each indoor unit, taking on the remaining load, which can ensure safe and reliable operation of the system.

[0221] Moreover, the air conditioner 10 of this embodiment adopts a three-pipe structure for the indoor unit, so that the converter used to connect the indoor heat exchanger with the high-pressure air pipe and the low-pressure air pipe in the related technology can be omitted, and the number of valves in the whole machine can be reduced, and the control process can be simplified. Therefore, the main cooling and main heating modes can be more conveniently realized, and the different cooling and heating needs of different rooms can be more conveniently met.

[0222] At the same time, the air conditioner 10 of this embodiment has indoor heat exchangers 71 with dehumidification and reheating functions. Therefore, a dehumidification mode can also be implemented. For example, both indoor components 7 can perform dehumidification and reheating, or only one indoor component 7 can perform dehumidification and reheating, while the other indoor component 7 performs cooling or heating. In the dehumidification mode, the first valve 76 and the second valve 77 of the indoor component 7 performing dehumidification are both open, and the state of the first switching valve 3 and the second switching valve 4 depends on whether the entire indoor system is mainly heated or cooled. When the entire indoor system is mainly heated, the state of the first switching valve 3 and the second switching valve 4 can be consistent with the main heating mode, that is, when the entire indoor system is mainly cooled, the state of the first switching valve 3 and the second switching valve 4 can be consistent with the main cooling mode.

[0223] It can be seen that the air conditioner 10 of this embodiment can conveniently meet the different needs of different rooms for cooling and heating based on a relatively simple structure and a relatively simple control process. Moreover, it can not only realize overall cooling, overall heating, main cooling, main heating and cold and heat offset, but also realize dehumidification mode, with rich functions.

[0224] Next, we will introduce Figure 8 The embodiment shown.

[0225] Figure 8 The air conditioner 10 in the embodiment shown is Figure 1-Figure 7 The air conditioner 10 in the embodiment shown has a substantially identical overall structure, the main difference being that the structure of the indoor heat exchanger 71 has been modified. Figure 8 Only the structure of the indoor heat exchanger 71 is shown, and the structures of other parts are not shown.

[0226] like Figure 8As shown, in this embodiment, although the indoor heat exchanger 71 still includes a first heat exchanger 711 for dehumidification and a second heat exchanger 712 for reheating, the first heat exchanger 711 and the second heat exchanger 712 are no longer disconnected from each other, but are disconnectably connected.

[0227] Specifically, in this embodiment, the indoor heat exchanger 71 includes not only a first heat exchanger 711 and a second heat exchanger 712, but also a first connecting pipe 713, a second connecting pipe 714, a first control valve 715, and a second control valve 716. The first connecting pipe 713 and the second connecting pipe 714 are both connected between the first heat exchanger 711 and the second heat exchanger 712, thereby connecting the first heat exchanger 711 and the second heat exchanger 712. The first control valve 715 and the second control valve 716 are both solenoid valves, which are respectively provided on the first connecting pipe 713 and the second connecting pipe 714, and respectively control the opening and closing of the first connecting pipe 713 and the second connecting pipe 714, thereby controlling whether the first heat exchanger 711 and the second heat exchanger 712 are connected.

[0228] Among them, when the first control valve 715 and the second control valve 716 are disconnected, the first heat exchanger 711 and the second heat exchanger 712 are disconnected from each other and are not connected to each other. In this case, the first heat exchanger 711 and the second heat exchanger 712 perform different functions, one dehumidifies and the other reheats, which can meet the requirements of the dehumidification and reheating functions.

[0229] When the first control valve 715 and the second control valve 716 are opened, the first heat exchanger 711 and the second heat exchanger 712 are connected to each other to form a parallel relationship. In this way, when the indoor heat exchanger 71 is heating, the refrigerant flowing into the indoor heat exchanger 71 from the high-pressure gas pipe 61 can flow through the second heat exchanger 712, and can also be diverted to the first heat exchanger 711 through the first connecting pipe 713, and then merged with the refrigerant flowing through the second heat exchanger 712 through the second connecting pipe 714, and flow together to the liquid pipe 63 to complete the heating cycle; when the indoor heat exchanger 71 is cooling, the refrigerant flowing into the indoor heat exchanger 71 from the liquid pipe 63 can both flow through the first heat exchanger 711 and can also be diverted to the second heat exchanger 712 through the second connecting pipe 714, and then merged with the refrigerant flowing through the first heat exchanger 711 through the first connecting pipe 713, and flow together to the low-pressure gas pipe 62 to complete the refrigeration cycle. It can be seen that controlling the first control valve 715 and the second control valve 716 to open can make the first heat exchanger 711 and the second heat exchanger 712 perform the same function and participate in the refrigeration cycle or the heating cycle at the same time, without one working while the other is idle. This is conducive to improving equipment utilization, increasing the heat exchange area, and improving heat exchange efficiency.

[0230] It can be seen that by arranging the first connecting pipe 713, the second connecting pipe 714, the first control valve 715 and the second control valve 716 between the first heat exchanger 711 and the second heat exchanger 712, the operation mode of the corresponding indoor heat exchanger 71 can be further enriched, and the working flexibility of the corresponding indoor heat exchanger 71 can be improved, so that the corresponding indoor heat exchanger 71 can realize both the dehumidification and reheating functions and the efficient independent cooling or heating process.

[0231] It is understandable, although Figure 1-Figure 7 as well as Figure 8 Two structural forms of the indoor heat exchanger 71 are shown, but in fact, the structural form of the indoor heat exchanger 71 is not limited to this. For example, as a variation, the indoor heat exchanger 71 may no longer include the first heat exchanger 711 and the second heat exchanger 712, but may be constructed as an integrated structure. In this case, the indoor heat exchanger 71 does not have the dehumidification and reheating function.

[0232] in addition, Figure 1-Figure 7 The embodiment shown, and Figure 8 The illustrated embodiments are all described with the case where there are two indoor components 7 as an example, but it should be understood that the number of indoor components 7 is not limited to two, but can also be three or more, that is, the air conditioner 10 can include at least three indoor components 7. Regardless of whether the air conditioner 10 includes two or more indoor components 7, the indoor heat exchangers 71 of different indoor components 7 can adopt the same structure or different structures. For example, in some embodiments, a part of the indoor heat exchangers 71 adopts Figure 2 The structure shown in the figure, the other part of the indoor heat exchanger 71 adopts Figure 8 For example, in some other embodiments, a portion of the indoor heat exchanger 71 adopts Figure 2 As shown in the structure, another part of the indoor heat exchanger 71 adopts an integrated structure without dehumidification and reheating function; for example, in some embodiments, a part of the indoor heat exchanger 71 adopts Figure 2 The structure shown in the figure, the other part of the indoor heat exchanger 71 adopts Figure 8 In the structure shown, the remaining indoor heat exchanger 71 adopts an integrated structure without dehumidification and reheating functions. It can be seen that when the air conditioner 10 includes at least three indoor components 7, more flexible and diverse working modes can be achieved.

[0233] The above description is merely an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. An air conditioner (10), characterized in that: include: compressor (1); outdoor heat exchanger (5); a liquid pipe (63) connected to a first end of the outdoor heat exchanger (5); High-pressure air pipe (61); A first on-off valve (65) is provided on the high-pressure gas pipe (61) to control the on-off of the high-pressure gas pipe (61); low-pressure trachea (62); a switching device (101) connecting the high-pressure gas pipe (61), the low-pressure gas pipe (62), and the second end of the outdoor heat exchanger (5) to the exhaust port (11) and the intake port (12) of the compressor (1), and controlling the on-off between the high-pressure gas pipe (61), the low-pressure gas pipe (62), the second end of the outdoor heat exchanger (5), and the exhaust port (11) and the intake port (12) of the compressor (1); and At least two indoor components (7), the at least two indoor components (7) are arranged in parallel and each comprises an indoor heat exchanger (71) and a control device (78), the indoor heat exchanger (71) having a low-pressure interface (71a) and a high-pressure interface (71c), the low-pressure interface (71a) being connected to the low-pressure gas pipe (62) and the liquid pipe (63), the high-pressure interface (71c) being connected to the high-pressure gas pipe (61) and the liquid pipe (63), the control device (78) controlling the connection and disconnection of the low-pressure interface (71a) and the high-pressure interface (71c) and the liquid pipe (63), so as to cooperate with the switching device (101), so that when the indoor heat exchanger (71) of one part of the indoor components (7) of the at least two indoor components (7) is heating, the indoor heat exchanger (71) of the other part of the indoor components (7) can be cooling; Among the at least two indoor components (7), the indoor heat exchanger (71) of at least one indoor component (7) includes a first heat exchanger (711) and a second heat exchanger (712), the first heat exchanger (711) and the second heat exchanger (712) can respectively cool and dehumidify and heat and reheat the indoor air, the low-pressure interface (71a) is provided on the first heat exchanger (711), the high-pressure interface (71c) is provided on the second heat exchanger (712), and the indoor heat exchanger (71) including the first heat exchanger (711) and the second heat exchanger (712) further includes a first connecting pipe (713), a second connecting pipe (714), and a second connecting pipe (715). Two connecting pipes (714), a first control valve (715) and a second control valve (716), wherein the first connecting pipe (713) and the second connecting pipe (714) are both connected between the first heat exchanger (711) and the second heat exchanger (712), and the first control valve (715) and the second control valve (716) are respectively arranged on the first connecting pipe (713) and the second connecting pipe (714), and respectively control the opening and closing of the first connecting pipe (713) and the second connecting pipe (714) to control whether the first heat exchanger (711) and the second heat exchanger (712) are connected.

2. The air conditioner (10) according to claim 1, characterized in that The indoor heat exchanger (71) further comprises a first liquid pipe interface (71b) and a second liquid pipe interface (71d), wherein the first liquid pipe interface (71b) and the second liquid pipe interface (71d) are respectively connected to the low-pressure interface (71a) and the high-pressure interface (71c) and the liquid pipe (63), and the control device (78) comprises a first valve (76) and a second valve (77), wherein the first valve (76) is arranged on the pipeline between the first liquid pipe interface (71b) and the liquid pipe (63) and controls on-off, and the second valve (77) is arranged on the pipeline between the second liquid pipe interface (71d) and the liquid pipe (63) and controls on-off.

3. The air conditioner (10) according to claim 1, characterized in that The switching device (101) includes a first switching valve (3) and a second switching valve (4), wherein the first switching valve (3) has a first port (31), a second port (32) and a third port (33), wherein the first port (31) is connected to the exhaust port (11) of the compressor (1), the second port (32) is connected to the intake port (12) of the compressor (1), and the third port (33) is connected to the second end of the outdoor heat exchanger (5) and is switchably connected to the first port (31) and the second port (32). 4) having a first valve port (41), a second valve port (42) and a third valve port (43), wherein the first valve port (41) is connected to the exhaust port (11) of the compressor (1), the second valve port (42) is connected to the intake port (12) of the compressor (1), the third valve port (43) is switchably connected to the first valve port (41) and the second valve port (42), the high-pressure gas pipe (61) is connected to the first port (31) and the first valve port (41), and the low-pressure gas pipe (62) is connected to the third valve port (43).

4. The air conditioner (10) according to claim 3, characterized in that The first switching valve (3) further comprises a fourth port (34), the fourth port (34) being switchably connected to the first port (31) and the second port (32) and being cut off from the outside; and / or the second switching valve (4) further comprises a fourth valve port (44), the fourth valve port (44) being switchably connected to the first valve port (41) and the second valve port (42) and being cut off from the outside.

5. The air conditioner (10) according to claim 4, characterized in that The first switching valve (3) is a four-way valve; and / or the second switching valve (4) is a four-way valve.

6. The air conditioner (10) according to any one of claims 1 to 5, characterized in that: At least one of the first control valve (715) and the second control valve (716) is a solenoid valve.

7. The air conditioner (10) according to claim 2, characterized in that At least one of the first valve (76) and the second valve (77) is a throttle valve.

8. The air conditioner (10) according to claim 7, characterized in that At least one of the first valve (76) and the second valve (77) is an expansion valve.

9. The air conditioner (10) according to any one of claims 1 to 5, characterized in that: The air conditioner (10) comprises at least three indoor components (7).

10. The air conditioner (10) according to any one of claims 1-5, characterized in that The air conditioner (10) further comprises at least one of the following: a regulating valve (64) disposed on the liquid pipe (63) for throttling the refrigerant flowing through the liquid pipe (63); a second on-off valve (66), provided on the low-pressure air pipe (62) to control the on-off of the low-pressure air pipe (62); a third on-off valve (67), provided on the liquid pipe (63) to control the on-off of the liquid pipe (63); A high-pressure sensor (81) is provided on a pipeline between the exhaust port (11) of the compressor (1) and the switching device (101) to perform high-pressure detection; A low pressure sensor (82) is provided on the pipeline between the air intake port (12) of the compressor (1) and the switching device (101) to perform low pressure detection.

11. A method for controlling an air conditioner (10) according to any one of claims 1 to 10, characterized in that: include: determining a target operating mode of the air conditioner (10); According to the determined target operating mode, the switching device (101) and the regulating device (78) are controlled so that the air conditioner (10) operates in the target operating mode.

12. The control method according to claim 11, characterized in that: The target operating mode is any one of the whole cooling, whole heating, main cooling, main heating and cold / hot offset modes, and, according to the determined target operating mode, controlling the switching device (101) and the regulating device (78) includes at least one of the following: When the determined target operating mode is the overall cooling mode, the switching device (101) is controlled to connect the second end of the outdoor heat exchanger (5) to the exhaust port (11) of the compressor (1), and to connect the low-pressure gas pipe (62) to the intake port (12) of the compressor (1), and the control device (78) of each indoor component (7) is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) to the liquid pipe (63) respectively; When the determined target operating mode is the full-heating mode, the switching device (101) is controlled to connect the high-pressure gas pipe (61) and the low-pressure gas pipe (62) to the exhaust port (11) of the compressor (1), and to connect the second end of the outdoor heat exchanger (5) to the intake port (12) of the compressor (1), and the control device (78) of each indoor component (7) is controlled to connect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) to the liquid pipe (63); When the determined target operation mode is the main cooling mode, the switching device (101) is controlled to connect the high-pressure gas pipe (61) and the second end of the outdoor heat exchanger (5) to the exhaust port (11) of the compressor (1), and to connect the low-pressure gas pipe (62) to the intake port (12) of the compressor (1), and the regulating device (78) of the indoor component (7) for cooling is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) to the liquid pipe (63), respectively, and the regulating device (78) of the indoor component (7) for heating is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) to the liquid pipe (63), respectively. When the determined target operating mode is the main heating mode, the switching device (101) is controlled to connect the high-pressure gas pipe (61) with the exhaust port (11) of the compressor (1), and connect the low-pressure gas pipe (62) and the second end of the outdoor heat exchanger (5) with the intake port (12) of the compressor (1), and the regulating device (78) of the indoor component (7) for cooling is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) with the liquid pipe (63), respectively, and the regulating device (78) of the indoor component (7) for heating is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) with the liquid pipe (63), respectively; When the target operating mode is determined to be the cold / hot offset mode, the switching device (101) is controlled to connect the high-pressure gas pipe (61) to the exhaust port (11) of the compressor (1), connect the low-pressure gas pipe (62) to the intake port (12) of the compressor (1), and disconnect the second end of the outdoor heat exchanger (5) from both the intake port (12) and the exhaust port (11) of the compressor (1), and the regulating device (78) of the indoor component (7) for cooling is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) to the liquid pipe (63), respectively, and the regulating device (78) of the indoor component (7) for heating is controlled to connect and disconnect the low-pressure interface (71a) and the high-pressure interface (71c) of the corresponding indoor heat exchanger (71) to the liquid pipe (63), respectively. The overall cooling mode means that all indoor heat exchangers (71) of the air conditioner (10) perform cooling; the overall heating mode means that all indoor heat exchangers (71) of the air conditioner (10) perform heating; the main cooling mode means that a part of the indoor heat exchangers (71) of the air conditioner (10) perform cooling, and another part of the indoor heat exchangers (71) perform heating, and the cooling demand is greater than the heating demand; the main heating mode means that a part of the indoor heat exchangers (71) of the air conditioner (10) perform cooling, and another part of the indoor heat exchangers (71) perform heating, and the heating demand is greater than the cooling demand; the cold and heat offset mode means that a part of the indoor heat exchangers (71) of the air conditioner (10) perform cooling, and another part of the indoor heat exchangers (71) perform heating, and the heating demand is equal to the cooling demand.

13. The control method according to claim 12, characterized in that: The target operating mode is any one of the whole cooling, whole heating, main cooling, main heating and cold / hot offset modes, and, according to the determined target operating mode, controlling the switching device (101) and the regulating device (78) includes at least one of the following: When the determined target operating mode is the overall cooling mode, the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the first port (31) and disconnected from the second port (32), the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the second valve port (42) and disconnected from the first valve port (41), and the first valve (76) of the control device (78) of each indoor component (7) is opened and the second valve (77) is closed; When the determined target operating mode is the full-heating mode, the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the second port (32) and disconnected from the first port (31), the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the first valve port (41) and disconnected from the second valve port (42), and the first valve (76) and the second valve (77) of the control device (78) of each indoor component (7) are both opened; When the determined target operation mode is the main cooling mode, the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the first port (31) and disconnected from the second port (32), the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the second valve port (42) and disconnected from the first valve port (41), and the first valve (76) of the control device (78) of the indoor component (7) performing heating is closed and the second valve (77) is opened, and the first valve (76) of the control device (78) of the indoor component (7) performing cooling is opened and the second valve (77) is closed; When the determined target operation mode is the main heating mode, the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the second port (32) and disconnected from the first port (31), the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the second valve port (42) and disconnected from the first valve port (41), and the first valve (76) of the control device (78) of the indoor component (7) performing heating is closed and the second valve (77) is opened, and the first valve (76) of the control device (78) of the indoor component (7) performing cooling is opened and the second valve (77) is closed; When the determined target operating mode is the cold / hot offset mode, the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the first port (31) and disconnected from the second port (32), the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the second valve port (42) and disconnected from the first valve port (41), and the first valve (76) of the control device (78) of the indoor component (7) for heating is closed and the second valve (77) is opened, and the first valve (76) of the control device (78) of the indoor component (7) for cooling is opened and the second valve (77) is closed.

14. The control method according to claim 11, characterized in that: The target operating mode is a dehumidification mode, and, according to the determined target operating mode, controlling the switching device (101) and the regulating device (78) includes: The control device (78) of the indoor component (7) for dehumidification is controlled to connect the low-pressure interface (71a) and the high-pressure interface (71c) to the liquid pipe (63), and the switching device (101) is controlled to connect the high-pressure gas pipe (61) and the second end of the outdoor heat exchanger (5) to the exhaust port (11) of the compressor (1), and connect the low-pressure gas pipe (62) to the intake port (12) of the compressor (1); or the switching device (101) is controlled to connect the high-pressure gas pipe (61) to the exhaust port (11) of the compressor (1), and connect the low-pressure gas pipe (62) and the second end of the outdoor heat exchanger (5) to the intake port (12) of the compressor (1); The dehumidification mode refers to the first heat exchanger (711) of the indoor heat exchanger (71) of at least one indoor component (7) cooling and dehumidifying the indoor air, and the second heat exchanger (712) heating and reheating the indoor air.

15. The control method according to claim 14, characterized in that: The target operating mode is a dehumidification mode, and, according to the determined target operating mode, controlling the switching device (101) and the regulating device (78) includes: The first valve (76) and the second valve (77) of the control device (78) of the indoor component (7) for controlling dehumidification are both opened, and the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the first port (31) and disconnected from the second port (32), and the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the second valve port (42) and disconnected from the first valve port (41); or the third port (33) of the first switching valve (3) of the switching device (101) is controlled to be connected to the second port (32) and disconnected from the first port (31), and the third valve port (43) of the second switching valve (4) of the switching device (101) is controlled to be connected to the second valve port (42) and disconnected from the first valve port (41).

16. The control method according to any one of claims 11 to 15, characterized in that: In the process of controlling the switching device (101) and the regulating device (78) according to the determined target operating mode, the first control valve (715) and the second control valve (716) of the indoor component (7) are also controlled.

17. The control method according to claim 16, characterized in that: Controlling the first control valve (715) and the second control valve (716) of the indoor component (7) includes at least one of the following: For the indoor heat exchanger (71) performing dehumidification, controlling the first control valve (715) and the second control valve (716) to be closed; For an indoor heat exchanger (71) that performs only cooling or only heating, the first control valve (715) and the second control valve (716) are controlled to open.

18. A controller (9), characterized in that The invention comprises a memory (91) and a processor (92) coupled to the memory (91), wherein the processor (92) is configured to execute the control method according to any one of claims 11 to 17 based on instructions stored in the memory (91).

19. An air conditioning system, characterized in that: The invention comprises an air conditioner (10) according to any one of claims 1 to 10 and a controller (9) according to claim 18.

20. A computer-readable storage medium storing computer instructions, wherein the computer instructions are executed by a processor (92) to implement the control method according to any one of claims 11 to 17.

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