Air conditioning system and method for controlling the same

Abstract

The present application relates to the technical field of intelligent household appliances, and discloses an air-conditioning system, which includes an outdoor unit having an outdoor heat exchanger, a first compressor, and a second compressor, and further includes a first indoor unit, a second indoor unit, a first four-way valve, and a second four-way valve. By regulating the connection between the respective valve ports of the first four-way valve and the second four-way valve, the first compressor is connected to the first indoor unit and / or the second indoor unit, the second compressor is connected to the second indoor unit and / or the first indoor unit. The first indoor unit includes a first indoor heat exchanger and a second indoor heat exchanger, and the second indoor unit includes a third indoor heat exchanger and a fourth indoor heat exchanger, so as to regulate the connection between the intake port or the exhaust port of the first compressor and the first indoor heat exchanger and / or the second indoor heat exchanger, and the connection between the intake port or the exhaust port of the second compressor and the third indoor heat exchanger and / or the fourth indoor heat exchanger, thereby realizing the operation mode. The present application also discloses a method for controlling the air-conditioning system.

Description

Technical Field

[0001] This application relates to the technical field of intelligent household appliances, for example, to an air conditioning system and a method for controlling the air conditioning system. Background Art

[0002] Currently, with the improvement of living standards and the popularization of air conditioners, air conditioners are installed in each room of users' homes. Therefore, the functional requirements for air conditioners are becoming more diverse. For different rooms, there are different requirements when using air conditioners.

[0003] In related art air conditioners, there is an outdoor unit and multiple indoor units. At least one indoor unit is set in each room, and the indoor unit operates in any one of the heating and cooling operation modes to condition the air in the room.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0005] In the related art, multiple indoor units can only all cool (including cooling and dehumidifying) or heat, or some of the multiple indoor units cool and the other part heats. However, when some of the multiple indoor units achieve partial cooling / heating, the other part cannot achieve other functions such as heating and dehumidifying or defrosting. This makes the functions of the air conditioner single, and also makes the air conditioner unable to provide multiple different operation modes according to users.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. The summary is not a general review, nor is it intended to identify key / important elements or delineate the protection scope of these embodiments, but rather serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide an air conditioning system and a method for controlling the air conditioning system to increase the diversity of the operation modes of the air conditioning system and improve its operation reliability.

[0009] In some embodiments, the air conditioning system includes an outdoor unit having an outdoor heat exchanger, a first compressor, and a second compressor, and further includes: a first indoor unit including a first indoor heat exchanger and a second indoor heat exchanger arranged in parallel; a second indoor unit including a third indoor heat exchanger and a fourth indoor heat exchanger arranged in parallel; a first four-way valve including a first valve port, a second valve port, a third valve port, and a fourth valve port, where the first valve port is connected to the first exhaust port of the first compressor, the second valve port is connected to the first intake port of the first compressor, the third valve port is connected to the outdoor heat exchanger, and the fourth valve port is connected to the second indoor heat exchanger and / or the fourth indoor heat exchanger; wherein, the first valve port is used to be connected to the third valve port, and the second valve port is used to be connected to the fourth valve port to conduct the exhaust port of the first compressor, the outdoor heat exchanger, and the first indoor unit and / or the second indoor unit, and conduct the second indoor heat exchanger and / or the fourth indoor heat exchanger to the intake port of the first compressor; or, the first valve port is used to be connected to the fourth valve port, and the second valve port is used to be connected to the third valve port to conduct the exhaust port of the first compressor and the second indoor heat exchanger and / or the fourth indoor heat exchanger; a second four-way valve including a fifth valve port, a sixth valve port, a seventh valve port, and an eighth valve port, where the fifth valve port is connected to the second exhaust port of the second compressor, the sixth valve port is connected to the second intake port of the second compressor, the seventh valve port is connected to the outdoor heat exchanger, and the eighth valve port is connected to the first indoor heat exchanger and / or the third indoor heat exchanger; wherein, the fifth valve port is used to be connected to the seventh valve port, and the sixth valve port is used to be connected to the eighth valve port to conduct the exhaust port of the second compressor, the outdoor heat exchanger, and the third indoor unit and / or the fourth indoor unit, and conduct the first indoor heat exchanger and / or the third heat exchanger to the intake port of the second compressor; or, the fifth valve port is used to be connected to the eighth valve port, and the sixth valve port is used to be connected to the seventh valve port to conduct the exhaust port of the second compressor and the first indoor heat exchanger and / or the third indoor heat exchanger.

[0010] In some embodiments, the method includes: in response to a control instruction, determining a first target operation mode of the first indoor unit and a second target operation mode of the second indoor unit; and regulating the first four-way valve and the second four-way valve according to the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit, so that the first compressor is connected to the first indoor unit and / or the second indoor unit, and the second compressor is connected to the second indoor unit and / or the first indoor unit.

[0011] The air conditioning system and the method for controlling the air conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0012] By adjusting the connections between the ports of the first four-way valve and the connections between the ports of the second four-way valve, the first compressor can be connected to the first indoor unit and / or the second indoor unit, and the second compressor can be connected to the second indoor unit and / or the first indoor unit. Wherein, the first indoor unit includes a first indoor heat exchanger and a second indoor heat exchanger, and the second indoor unit includes a third indoor heat exchanger and a fourth indoor heat exchanger. Thus, the connection between the inlet or outlet of the first compressor and the first indoor heat exchanger and / or the second indoor heat exchanger can be adjusted, and the connection between the inlet or outlet of the second compressor and the third indoor heat exchanger and / or the fourth indoor heat exchanger can be adjusted. Furthermore, different operating modes can be achieved for the first indoor unit and the second indoor unit, so as to increase the diversity of the operating modes of the air-conditioning system and improve the reliability of the operation of the air-conditioning system.

[0013] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation, and wherein:

[0015] Figure 1 is a structural diagram of an air-conditioning system provided by an embodiment of the present disclosure;

[0016] Figure 2 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0017] Figure 3 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0018] Figure 4 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0019] Figure 5 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0020] Figure 6 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0021] Figure 7 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0022] Figure 8 is a structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0023] Figure 9It is a structural diagram of another air conditioning system provided by an embodiment of the present disclosure;

[0024] Figure 10 It is a structural diagram of another air conditioning system provided by an embodiment of the present disclosure;

[0025] Figure 11 It is a structural diagram of another air conditioning system provided by an embodiment of the present disclosure;

[0026] Figure 12 It is a structural diagram of another air conditioning system provided by an embodiment of the present disclosure;

[0027] Figure 13 It is a structural diagram of another air conditioning system provided by an embodiment of the present disclosure;

[0028] Figure 14 It is a structural diagram of another air conditioning system provided by an embodiment of the present disclosure;

[0029] Figure 15 It is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;

[0030] Figure 16 It is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;

[0031] Figure 17 It is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;

[0032] Figure 18 It is a schematic diagram of another method for controlling an air conditioning system provided by an embodiment of the present disclosure;

[0033] Figure 19 It is a schematic diagram of a device for controlling an air conditioning system provided by an embodiment of the present disclosure.

[0034] Reference numerals:

[0035] 100, outdoor heat exchanger; 210, first compressor; 220, second compressor; 310, first four-way valve; 311, first valve port; 312, second valve port; 313, third valve port; 314, fourth valve port; 320, second four-way valve; 321, fifth valve port; 322, sixth valve port; 323, seventh valve port; 324, eighth valve port; 410, first indoor heat exchanger; 420, second indoor heat exchanger; 430, third indoor heat exchanger; 440, fourth indoor heat exchanger; 510, first throttling device; 520, second throttling device; 530, third throttling device; 540, fourth throttling device; 550, outdoor unit throttling device; 610, first control valve; 620, second control valve; 700, gas-liquid separator; 810, first solenoid valve; 820, second solenoid valve; 830, third solenoid valve. Detailed implementation mode

[0036] In order to more comprehensively understand the features and technical content of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration purposes only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, multiple details are provided to fully understand the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices may be shown in a simplified manner to simplify the drawings.

[0037] In the embodiments of the present disclosure, the terms "first", "second", etc. in the description and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0038] Unless otherwise specified, the term "plurality" means two or more.

[0039] In the embodiments of the present disclosure, the character " / " indicates that the objects before and after are in an "or" relationship. For example, A / B means: A or B.

[0040] The term "and / or" is a description of the associated relationship of objects and indicates that three relationships can exist. For example, A and / or B means: A or B, or, A and B these three relationships.

[0041] The term "corresponding" can refer to an associated relationship or a binding relationship. A corresponding to B means that there is an associated relationship or a binding relationship between A and B.

[0042] In the embodiments of the present disclosure, an intelligent household appliance device refers to a household appliance product formed by introducing microprocessor, sensor technology, and network communication technology into household appliance devices, which has the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process of intelligent household appliance devices often relies on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips. For example, intelligent household appliance devices can be connected to electronic devices to achieve remote control and management of intelligent household appliance devices by users.

[0043] In the disclosed embodiments, a terminal device refers to an electronic device with a wireless connection function. The terminal device can be communicatively connected to the above-mentioned intelligent household appliance device by connecting to the Internet, or can also be communicatively connected to the above-mentioned intelligent household appliance device directly through methods such as Bluetooth and Wi-Fi. In some embodiments, the terminal device is, for example, a mobile device, a computer, or an in-vehicle device built in a hover car, etc., or any combination thereof. The mobile device can, for example, include a mobile phone, a smart home device, a wearable device, a smart mobile device, a virtual reality device, etc., or any combination thereof, wherein the wearable device includes, for example: a smart watch, a smart bracelet, a pedometer, etc.

[0044] Combined Figures 1 to 7 As shown, the embodiments of the present disclosure provide an air conditioning system, which includes an outdoor unit having an outdoor heat exchanger 100, a first compressor 210, and a second compressor 220, and further includes a first indoor unit, a second indoor unit, a first four-way valve 310, a second four-way valve 320, a first throttling device 510, a second throttling device 520, a third throttling device 530, a fourth throttling device 540, an outdoor unit throttling device 550, a first control valve 610, a second control valve 620, and a gas-liquid separator 700.

[0045] The first indoor unit includes a first indoor heat exchanger 410 and a second indoor heat exchanger 420 arranged in parallel. The second indoor unit includes a third indoor heat exchanger 430 and a fourth indoor heat exchanger 440 arranged in parallel.

[0046] The first four-way valve 310 includes a first valve port 311, a second valve port 312, a third valve port 313, and a fourth valve port 314. The first valve port 311 is connected to the first exhaust port of the first compressor 210, the second valve port 312 is connected to the first intake port of the first compressor 210, the third valve port 313 is connected to the outdoor heat exchanger 100, and the fourth valve port 314 is connected to the second indoor heat exchanger 420 and / or the fourth indoor heat exchanger 440. Among them, the first valve port 311 is used to connect to the third valve port 313, and the second valve port 312 is used to connect to the fourth valve port 314 to conduct the exhaust port of the first compressor 210, the outdoor heat exchanger 100, and the first indoor unit and / or the second indoor unit, and conduct the second indoor heat exchanger 420 and / or the fourth indoor heat exchanger to the intake port of the first compressor 210; or, the first valve port 311 is used to connect to the fourth valve port 314, and the second valve port 312 is used to connect to the third valve port 313 to conduct the exhaust port of the first compressor 210 and the second indoor heat exchanger 420 and / or the fourth indoor heat exchanger 440.

[0047] The second four-way valve 320 includes a fifth valve port 321, a sixth valve port 322, a seventh valve port 323, and an eighth valve port 324. The fifth valve port 321 is connected to the second exhaust port of the second compressor 220, the sixth valve port 322 is connected to the second intake port of the second compressor 220, the seventh valve port 323 is connected to the outdoor heat exchanger 100, and the eighth valve port 324 is connected to the first indoor heat exchanger 410 and / or the third indoor heat exchanger 430. Among them, the fifth valve port 321 is used to connect to the seventh valve port 323, and the sixth valve port 322 is used to connect to the eighth valve port 324 to conduct the exhaust port of the second compressor 220, the outdoor heat exchanger 100, and the first indoor unit and / or the second indoor unit, and conduct the first indoor heat exchanger 410 and / or the third indoor heat exchanger 430 to the intake port of the second compressor 220; or, the fifth valve port 321 is used to connect to the eighth valve port 324, and the sixth valve port 322 is used to connect to the seventh valve port 323 to conduct the exhaust port of the second compressor 220 and the first indoor heat exchanger 410 and / or the third indoor heat exchanger 430.

[0048] By adopting the air conditioning system provided by the embodiments of the present disclosure, through the setting of the first compressor and the second compressor, and the adjustment of the connection between the ports of the first four-way valve and the regulation of the connection between the ports of the second four-way valve, the second indoor heat exchanger and / or the fourth indoor heat exchanger can be directly connected to the first exhaust port / first intake port of the first compressor; and the first indoor heat exchanger and / or the third indoor heat exchanger can be directly connected to the first exhaust port / first intake port of the first compressor, so that the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger, and the fourth indoor heat exchanger can have the same working state or different working states, so as to form various operating modes of the air conditioner, and further enable the first indoor unit and the second indoor unit to achieve different operating modes, so as to increase the diversity of the operating modes of the air conditioning system and improve the reliability of the operation of the air conditioning system. In addition, the air conditioning system provided by the embodiments of the present disclosure only needs to be provided with one outdoor heat exchanger, which can reduce costs and the floor area of the outdoor unit.

[0049] Optionally, the first compressor 210 and the second compressor 220 are the same compressor. The first indoor unit and the second indoor unit are respectively arranged in different rooms and are connected by pipelines to the outdoor unit to form a system for the refrigerant to circulate.

[0050] Optionally, the first throttling device 510 is arranged on the first pipeline of the first indoor heat exchanger 410 and is used to conduct or cut off the first pipeline so that the first indoor heat exchanger 410 operates or shuts down. The second throttling device 520 is arranged on the second pipeline of the second indoor heat exchanger 420 and is used to conduct or cut off the second pipeline so that the second indoor heat exchanger 420 operates or shuts down. The third throttling device 530 is arranged on the third pipeline of the third indoor heat exchanger 430 and is used to conduct or cut off the third pipeline so that the third indoor heat exchanger 430 operates or shuts down. The fourth throttling device 540 is arranged on the fourth pipeline of the fourth indoor heat exchanger 440 and is used to conduct or cut off the fourth pipeline so that the fourth indoor heat exchanger 440 operates or shuts down.

[0051] Wherein, the first indoor heat exchanger 410 includes a first pipeline and a fifth pipeline, and the first pipeline and the fifth pipeline can respectively serve as the inflow pipeline and the outflow pipeline of the refrigerant of the first indoor heat exchanger 410. The first throttling device 510 is arranged on the first pipeline and is used to conduct or cut off the first pipeline so that the first indoor heat exchanger 410 operates or shuts down. That is to say, when the opening degree of the first throttling device 510 is greater than zero, the refrigerant can normally flow into or out of the first indoor heat exchanger 410, so that the first indoor heat exchanger 410 operates; when the opening degree of the first throttling device 510 is equal to zero, the first pipeline is cut off, and the refrigerant cannot flow through the first indoor heat exchanger 410.

[0052] Similarly, the second indoor heat exchanger 420 includes a second pipeline and a sixth pipeline. The second pipeline and the sixth pipeline can respectively serve as the inflow pipeline and the outflow pipeline of the refrigerant of the second indoor heat exchanger 420. The second throttling device 520 is arranged on the second pipeline and is used to conduct or cut off the second pipeline so that the second indoor heat exchanger 420 operates or shuts down. That is to say, when the opening degree of the second throttling device 520 is greater than zero, the refrigerant can normally flow into or out of the second indoor heat exchanger 420, so that the second indoor heat exchanger 420 operates; when the opening degree of the second throttling device 520 is equal to zero, the first pipeline is cut off, and the refrigerant cannot flow through the second indoor heat exchanger 420.

[0053] The third indoor heat exchanger 430 includes a third pipeline and a seventh pipeline. The third pipeline and the seventh pipeline can respectively serve as the inflow pipeline and the outflow pipeline of the refrigerant of the third indoor heat exchanger 430. The third throttling device 530 is arranged on the third pipeline and is used to conduct or cut off the third pipeline so that the third indoor heat exchanger 430 operates or shuts down. That is to say, when the opening degree of the third throttling device 530 is greater than zero, the refrigerant can normally flow into or out of the third indoor heat exchanger 430, so that the third indoor heat exchanger 430 operates; when the opening degree of the third throttling device 530 is equal to zero, the first pipeline is cut off, and the refrigerant cannot flow through the third indoor heat exchanger 430.

[0054] The fourth indoor heat exchanger 440 includes a fourth pipeline and an eighth pipeline. The fourth pipeline and the eighth pipeline can respectively serve as the inflow pipeline and the outflow pipeline of the refrigerant of the fourth indoor heat exchanger 440. The fourth throttling device 540 is arranged on the second pipeline and is used to conduct or cut off the second pipeline so that the fourth indoor heat exchanger 440 operates or shuts down. That is to say, when the opening degree of the fourth throttling device 540 is greater than zero, the refrigerant can normally flow into or out of the fourth indoor heat exchanger 440, so that the fourth indoor heat exchanger 440 operates; when the opening degree of the fourth throttling device 540 is equal to zero, the first pipeline is cut off, and the refrigerant cannot flow through the fourth indoor heat exchanger 440.

[0055] Optionally, the first control valve 610 is arranged on the pipeline between the second valve port 312 and the first intake port of the first compressor 210 and is used to connect or cut off the pipeline where it is located. The second control valve 620 is arranged on the pipeline between the sixth valve port 322 and the second intake port of the second compressor 220 and is used to connect or cut off the pipeline where it is located.

[0056] Optionally, the first control valve 610 and the second control valve 620 can be solenoid valves to facilitate the automatic control of the air conditioning system.

[0057] Optionally, the gas-liquid separator 700 includes an inlet, a first outlet, and a second outlet. The inlet is used to communicate with the second valve port 312. The first outlet is used to communicate with the first intake port of the first compressor 210. The inlet is also used to communicate with the sixth valve port 322. The second outlet is used to communicate with the second intake port of the second compressor 220. Among them, the first control valve 610 is located on the pipeline between the first inlet and the second valve port 312, and the second control valve 620 is located on the pipeline between the second inlet and the sixth valve port 322. Through the arrangement of the gas-liquid separator 700, liquid refrigerant can be prevented from entering the first compressor 210 or the second compressor 220, thereby improving the operating reliability of the air-conditioning system.

[0058] Optionally, the outdoor unit throttling device 550 is arranged on the pipeline between the outdoor unit and the first indoor unit / second indoor unit, and is used to throttle and depressurize the refrigerant flowing into the outdoor heat exchanger 100.

[0059] Optionally, another air-conditioning system provided by the embodiments of the present disclosure includes an outdoor unit having an outdoor heat exchanger 100, a first compressor 210, and a second compressor 220, and also includes a first indoor unit, a second indoor unit, a first four-way valve 310, a first solenoid valve 810, a second solenoid valve 820, a third solenoid valve 830, a first throttling device 510, a second throttling device 520, a third throttling device 530, a fourth throttling device 540, an outdoor unit throttling device 550, a first control valve 610, a second control valve 620, and a gas-liquid separator 700. As shown in Figure 8 The first solenoid valve 810 is arranged on the connecting pipeline between the exhaust ports of the first compressor 210 and the second compressor 220. The second solenoid valve 820 is arranged on the pipeline connecting the exhaust port of the second compressor 220 to the first indoor heat exchanger 410 and the third indoor heat exchanger 430. The third solenoid valve 830 is arranged between the pipeline connecting the second valve port 312 to the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440 and the pipeline connecting the first indoor heat exchanger 410 and the third indoor heat exchanger 430.

[0060] Optionally, the first solenoid valve 810 and the second solenoid valve 820 can be replaced by a three-way valve, and the above effects can also be achieved.

[0061] Combined with Figure 2As shown, when the first valve port 311 of the first four-way valve 310 is connected to the third valve port 313, the second valve port 312 is connected to the fourth valve port 314, and the fifth valve port 321 of the second four-way valve 320 is connected to the seventh valve port 323, and the sixth valve port 322 is connected to the eighth valve port 324, the air-conditioning system can be in the refrigeration mode or in the rapid defrosting mode. At this time, both the first control valve 610 and the second control valve 620 are in the conducting state, and the first throttling device 510, the second throttling device 520, the third throttling device 530, and the fourth throttling device 540 are also in the conducting state, so that the first exhaust port of the first compressor 210 is communicated with the outdoor heat exchanger 100, the second exhaust port of the second compressor 220 is communicated with the outdoor heat exchanger 100, and the refrigerant is split after flowing out of the outdoor heat exchanger 100 and enters the first indoor heat exchanger 410, the second indoor heat exchanger 420, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 440 respectively. After exchanging heat with the indoor air, the refrigerant flowing out of the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440 enters the gas-liquid separator 700 through the first four-way valve 310, and the refrigerant flowing out of the first indoor heat exchanger 410 and the third indoor heat exchanger 430 enters the gas-liquid separator 700 through the second four-way valve 320, and the refrigerant flowing out of the gas-liquid separator 700 returns to the first compressor 210 and the second compressor 220. Among them, in this process, the outdoor heat exchanger 100 serves as a condenser, and the first indoor heat exchanger 410, the second indoor heat exchanger 420, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 440 serve as evaporators, so as to realize the adjustment of reducing the indoor temperature. Among them, the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline are all refrigerant inflow pipelines.

[0062] Optionally, an outdoor fan is provided in the outdoor unit, a first indoor fan is provided in the first indoor unit, and a second indoor fan is provided in the second indoor unit. When the air-conditioning system is in the refrigeration mode, the outdoor fan, the first indoor fan, and the second indoor fan are all in the operating state. When the air-conditioning system is in the rapid defrosting mode, in order to make all the heat generated by the refrigerant be used for defrosting, the first indoor fan and the second indoor unit fan stop running.

[0063] Combined with Figure 9 As shown, optionally, when the first valve port 311 of the first four-way valve 310 is connected to the third valve port 313, the second valve port 312 is connected to the fourth valve port 314, and the first solenoid valve 810 and the third solenoid valve 830 are in the conducting state, and the second solenoid valve 820 is in the closed state, the air-conditioning system can be in the refrigeration mode or in the rapid defrosting mode.

[0064] Combined with Figure 3As shown, when the first valve port 311 of the first four-way valve 310 is connected to the fourth valve port 314, the second valve port 312 is connected to the third valve port 313, and the fifth valve port 321 of the second four-way valve is connected to the eighth valve port 324, and the sixth valve port 322 is connected to the seventh valve port 323, the air-conditioning system can be in the heating mode. At this time, both the first control valve 610 and the second control valve 620 are in the conducting state, and the first throttling device 510, the second throttling device 520, the third throttling device 530, and the fourth throttling device 540 are also in the conducting state, so that the first exhaust port of the first compressor 210 is communicated with the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440, and the second exhaust port of the second compressor 220 is communicated with the first indoor heat exchanger 410 and the third indoor heat exchanger 430. After the refrigerant exchanges heat with the indoor air, it converges and flows to the outdoor heat exchanger 100, enters the gas-liquid separator 700 through the first four-way valve 310 and the second four-way valve 320, and the refrigerant flowing out of the gas-liquid separator 700 returns to the first compressor 210 and the second compressor 220. In this process, the outdoor heat exchanger 100 serves as an evaporator, and the first indoor heat exchanger 410, the second indoor heat exchanger 420, the third indoor heat exchanger 430, and the fourth indoor heat exchanger 440 all serve as condensers, thereby realizing the adjustment of the indoor temperature increase. Among them, the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline are all refrigerant outflow pipelines.

[0065] Combined with Figure 10 As shown, optionally, when the first valve port 311 of the first four-way valve is connected to the fourth valve port 314, the second valve port 312 is connected to the third valve port 313, and the first solenoid valve 810 and the third solenoid valve 830 are in the closed state, and the second solenoid valve 820 is in the conducting state, the air-conditioning system can operate in the heating mode.

[0066] Combined with Figure 4As shown, when the first valve port 311 of the first four-way valve is connected to the fourth valve port 314, the second valve port 312 is connected to the third valve port 313, and the fifth valve port 321 and the seventh valve port 323 of the second four-way valve are connected, and the sixth valve port 322 is connected to the eighth valve port 324, the first indoor unit can operate in the cooling mode and the second indoor unit can operate in the heating mode. At this time, the first control valve 610 is in the closed state, and the second control valve 620 is in the conducting state, so that the exhaust port of the first compressor 210 is communicated with the fourth indoor heat exchanger 440, and the exhaust port of the second compressor 220 is communicated with the outdoor heat exchanger 100. The refrigerant flowing out of the outdoor heat exchanger 100 and the refrigerant flowing out of the fourth indoor heat exchanger 440 converge and then flow into the first indoor heat exchanger 410. The refrigerant flowing out of the first indoor heat exchanger 410 enters the gas-liquid separator 700 through the second four-way valve 320 and then returns to the first compressor 210 and the second compressor 220. In this process, the outdoor heat exchanger 100 serves as a condenser, the first indoor heat exchanger 410 serves as an evaporator to cool the air flowing through the first indoor unit, and the fourth indoor heat exchanger 440 serves as a condenser to heat the air flowing through the second indoor unit. Among them, the first throttling device 510 is in the conducting state, the second throttling device 520 is in the closed state, the third throttling device 530 is in the closed state, and the fourth throttling device 540 is in the conducting state, so that the second indoor heat exchanger 420 and the third indoor heat exchanger 430 are not connected to the refrigerant cycle. Optionally, the first throttling device 510 can be in the closed state, the second throttling device 520 can be in the conducting state, the third throttling device 530 can be in the conducting state, and the fourth throttling device 540 can be in the closed state, so that the exhaust port of the first compressor 210 is communicated with the third indoor heat exchanger 430, and the exhaust port of the second compressor 220 is communicated with the outdoor heat exchanger 100. The refrigerant flowing out of the outdoor heat exchanger 100 and the refrigerant flowing out of the third indoor heat exchanger 430 converge and then flow into the second indoor heat exchanger 420. The refrigerant flowing out of the second indoor heat exchanger 420 enters the gas-liquid separator 700 through the second four-way valve 320 and then returns to the first compressor 210 and the second compressor 220.

[0067] When the first indoor unit operates in the cooling mode and the second indoor unit operates in the heating mode, not only can the two indoor units of the air-conditioning system achieve different operating modes, but also the flow rate and subcooling degree of the refrigerant flowing to the first indoor heat exchanger 410 can be increased, and thus the cooling efficiency of the first indoor unit can be improved.

[0068] Combined Figure 11As shown, optionally, when the first valve port 311 and the fourth valve port 314 of the first four-way valve are connected, and the second valve port 312 and the third valve port 313 are connected, and the first solenoid valve 810 and the third solenoid valve 830 are in the closed state, and the second solenoid valve 820 is in the conducting state, the first indoor unit can operate in the cooling mode and the second indoor unit can operate in the heating mode.

[0069] Combined with Figure 5 As shown, when the first valve port 311 and the third valve port 313 of the first four-way valve are connected, the second valve port 312 and the fourth valve port 314 are connected, and the fifth valve port 321 and the eighth valve port 324 of the second four-way valve are connected, and the sixth valve port 322 and the seventh valve port 323 are connected, the first indoor unit and the second indoor unit can both operate in the reheating and dehumidifying mode, the non-stop defrosting mode or the timed defrosting mode. At this time, the first control valve 610 is in the conducting state, the second control valve is in the closed state, the first throttling device 510, the second throttling device 520, the third throttling device 530 and the fourth throttling device 540 are all in the conducting state, so that the first exhaust port of the first compressor 210 is communicated with the outdoor heat exchanger 100, the second exhaust port of the second compressor 220 is communicated with the first indoor heat exchanger 410 and the third indoor heat exchanger 430. After the refrigerant flowing out from the first indoor heat exchanger 410 and the third indoor heat exchanger 430 converges with the refrigerant flowing out from the outdoor heat exchanger 100, it is then split and flows to the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440 respectively. The refrigerant flowing out from the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440 flows through the first four-way valve 310 to the gas-liquid separator 700 and finally returns to the first compressor 210 and the second compressor 220.

[0070] During this process, the outdoor heat exchanger 100 serves as a condenser, the first indoor heat exchanger 410 and the third indoor heat exchanger 430 serve as condensers, and the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440 serve as evaporators. That is to say, the functions of the two indoor heat exchangers in the first indoor unit are different, and the functions of the two indoor heat exchangers in the second indoor unit are different. When the air conditioner operates in the reheating and dehumidifying mode, taking the first indoor unit as an example, the indoor high-temperature and high-humidity air first passes through the second indoor heat exchanger 420. Since the second indoor heat exchanger 420 serves as an evaporator, the refrigerant inside it can absorb the heat of the high-temperature and high-humidity air to cool it down. During the cooling process, the moisture in the air condenses, thus achieving the purpose of condensation and dehumidification. The air that becomes low-temperature and low-humidity then passes through the first indoor heat exchanger 410. Since the first indoor heat exchanger 410 serves as a condenser, the refrigerant inside it can condense and release heat to the low-temperature and low-humidity air to raise its temperature, thus achieving the reheating and dehumidification of the indoor air, avoiding the temperature of the dehumidified air from being too low, and improving the comfort of users.

[0071] Optionally, the working frequency of the first compressor 210 and the opening degree of the first throttling device 510 can be adjusted, so as to adjust the refrigerant flow rate and the condensation temperature in the first indoor heat exchanger 410, and further adjust the reheating heat that can be obtained by the low-temperature and low-humidity air, so as to adjust its temperature. In this way, the independent control of the indoor temperature and humidity is realized, so as to achieve the purpose of heating and dehumidifying and constant-temperature dehumidifying, so as to meet the needs of different user usage scenarios.

[0072] Optionally, when the user's demand is to cool and dehumidify. The first throttling device 510 can be controlled to close, or the air-conditioning system can be switched to the refrigeration mode to achieve the condensation dehumidification of the air.

[0073] Optionally, when the air conditioner operates in the non-stop defrosting mode or the timed defrosting mode, the outdoor fan stops running, so that cold air can be prevented from blowing into the rooms where the first indoor unit and the second indoor unit are located, thus avoiding the discomfort of the cold feeling of the user. When the air conditioner operates in the timed defrosting mode, the operating frequencies of the first compressor 210 and the second compressor 220 can be adjusted to adjust the energy distributed to the outdoor unit and the first indoor unit and the second indoor unit, so as to control the defrosting time.

[0074] Combined with Figure 12 As shown, optionally, when the first valve port 311 of the first four-way valve is connected to the third valve port 313, and the second valve port 312 and the fourth valve port 314 are connected, and the first solenoid valve 810 and the third solenoid valve 830 are in the closed state and the second solenoid valve 820 is in the conducting state, the first indoor unit and the second indoor unit can both operate in the reheating and dehumidifying mode, the non-stop defrosting mode or the timed defrosting mode.

[0075] Combined with Figure 6As shown, when the first valve port 311 of the first four-way valve is connected to the third valve port 313, the second valve port 312 is connected to the fourth valve port 314, the fifth valve port 321 of the second four-way valve is connected to the eighth valve port 324, and the sixth valve port 322 is connected to the seventh valve port 323, the first indoor unit can operate in the heat dehumidification mode and the second indoor unit can operate in the refrigeration mode. At this time, the first throttling device 510, the second throttling device 520, and the fourth throttling device 540 are all in the conducting state, and the third throttling device 530 is in the closed state to prevent the third indoor heat exchanger 430 from being connected to the refrigerant cycle. The first control valve 610 is in the conducting state, and the second control valve 620 is in the closed state, so that the exhaust port of the first compressor 210 is connected to the outdoor heat exchanger 100, and the exhaust port of the second compressor 220 is connected to the first indoor heat exchanger 410. The refrigerant flowing out of the first indoor heat exchanger 410 flows into the second indoor heat exchanger 420, and the refrigerant flowing out of the outdoor heat exchanger 100 flows into the fourth indoor heat exchanger 440. The refrigerant flowing out of the second indoor heat exchanger 420 and the fourth indoor heat exchanger 440 flows through the first four-way valve 310 to the gas-liquid separator 700 and then returns to the first compressor 210 and the second compressor 220. During this process, the outdoor heat exchanger 100 and the first indoor heat exchanger act as condensers, and the second indoor heat exchanger 420 and the fourth indoor heat exchanger act as evaporators, so that the first indoor unit can be used to reheat and dehumidify the indoor air, and the second indoor unit can be used to cool the indoor air.

[0076] Combined with Figure 13 As shown, optionally, when the first valve port 311 of the first four-way valve is connected to the third valve port 313, the second valve port 312 is connected to the fourth valve port 314, and the first solenoid valve 810 and the third solenoid valve 830 are in the closed state and the second solenoid valve 820 is in the conducting state, the first indoor unit can operate in the heat dehumidification mode and the second indoor unit can operate in the refrigeration mode.

[0077] Combined with Figure 7As shown, when the first valve port 311 of the first four-way valve is connected to the third valve port 313, the second valve port 312 is connected to the fourth valve port 314, the fifth valve port 321 of the second four-way valve is connected to the eighth valve port 324, and the sixth valve port 322 is connected to the seventh valve port 323, the first indoor unit can operate in the reheating and dehumidifying mode or the defrosting mode without stopping, and the second indoor unit can operate in the heating mode. At this time, the first throttling device 510, the second throttling device 520, and the third throttling device 530 are all in the conducting state, and the fourth throttling device 540 is in the closed state, so that the fourth indoor heat exchanger 440 is not connected to the refrigerant cycle. The first control valve 610 is in the conducting state, and the second control valve 620 is in the conducting state, so that the exhaust port of the first compressor 210 is communicated with the outdoor heat exchanger 100, and the exhaust port of the second compressor 220 is communicated with the first indoor heat exchanger 410 and the third indoor heat exchanger 430. After the refrigerant flowing out of the first indoor heat exchanger 410 and the third indoor heat exchanger 430 converges with the refrigerant flowing out of the outdoor heat exchanger 100, it flows into the second indoor heat exchanger 420. The refrigerant flowing out of the second indoor heat exchanger 420 flows through the first four-way valve 310 to the gas-liquid separator 700 and then returns to the first compressor 210 and the second compressor 220. In this process, the outdoor heat exchanger 100, the first indoor heat exchanger 410, and the third indoor heat exchanger 430 act as condensers, and the second indoor heat exchanger 420 acts as an evaporator, so that the first indoor unit can be used to realize reheating and dehumidifying of indoor air, and the second indoor unit can be used to realize heating of indoor air.

[0078] Optionally, when the first indoor unit operates in the defrosting mode without stopping and the second indoor unit operates in the heating mode, the outdoor fan stops rotating, so that cold air can be prevented from being blown into the room where the first indoor unit is located, and discomfort caused by cold feeling to the users in the room where the first indoor unit is located can be avoided.

[0079] Optionally, in combination with Figure 14 As shown, when the first valve port 311 of the first four-way valve is connected to the third valve port 313 and the second valve port 312 is connected to the fourth valve port 314, and the first solenoid valve 810 and the third solenoid valve 830 are in the closed state and the second solenoid valve 820 is in the conducting state, the first indoor unit can operate in the reheating and dehumidifying mode or the defrosting mode without stopping, and the second indoor unit can operate in the heating mode.

[0080] In combination with Figure 15 As shown, an embodiment of the present disclosure provides a method for controlling an air conditioner, including:

[0081] S01, the processor determines a first target operation mode of the first indoor unit and a second target operation mode of the second indoor unit in response to a control instruction.

[0082] S02. The processor adjusts the first four-way valve and the second four-way valve according to the first target operating mode of the first indoor unit and the second target operating mode of the second indoor unit, so that the first compressor is connected to the first indoor unit and / or the second indoor unit, and the second compressor is connected to the second indoor unit and / or the first indoor unit.

[0083] In this solution, the control instruction can be an instruction issued by the user through an intelligent device such as a remote controller or a mobile phone, or a voice instruction. Both the first indoor unit and the second indoor unit have multiple operating modes, including a cooling mode, a heating mode, a reheating and dehumidifying mode, a defrosting mode, and so on.

[0084] By using the method for controlling an air conditioner provided in the embodiment of the present disclosure, based on the control instruction, the first four-way valve 310 and the second four-way valve 320 can be adjusted to regulate the connection between the respective valve ports of the first four-way valve and the connection between the respective valve ports of the second four-way valve. Furthermore, the second indoor heat exchanger and / or the fourth indoor heat exchanger can be directly connected to the first exhaust port / first intake port of the first compressor 210; and the first indoor heat exchanger and / or the third indoor heat exchanger can be directly connected to the first exhaust port / first intake port of the first compressor 210, so that the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger, and the fourth indoor heat exchanger can have the same working state or different working states, thereby forming multiple operating modes of the air conditioner, and further enabling the first indoor unit and the second indoor unit to achieve different operating modes, so as to increase the diversity of the operating modes of the air conditioning system and improve the reliability of the operation of the air conditioning system.

[0085] Combined with Figure 16 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, including:

[0086] S11. The processor determines the first target operating mode of the first indoor unit and the second target operating mode of the second indoor unit in response to the control instruction.

[0087] S12. When the first target operating mode and the second target operating mode meet the first preset condition, the processor adjusts the first valve port of the first four-way valve to be connected to the third valve port, and the second valve port and the fourth valve port to be connected, so as to sequentially connect the first compressor, the outdoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the first compressor, the outdoor heat exchanger, and the fourth indoor heat exchanger; at the same time, the processor adjusts the fifth valve port and the eighth valve port of the second four-way valve to be connected, and the sixth valve port and the seventh valve port to be connected, so as to sequentially connect the second compressor, the first indoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the second compressor, the third indoor heat exchanger, and the fourth indoor heat exchanger.

[0088] Optionally, the first target operation mode and the second target operation mode are determined to meet the first preset condition in the following manner: both the first target operation mode and the second target operation mode are the reheating and dehumidifying modes; or, both the first target operation mode and the second target operation mode are the defrosting without shutdown modes and the outdoor fan is in the shutdown state; or, both the first target operation mode and the second target operation mode are the timed defrosting modes.

[0089] In this solution, when the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit determined meet the first preset condition, the conduction directions of the first four-way valve and the second four-way valve can be controlled, so as to control the exhaust port of the first compressor to conduct to the outdoor heat exchanger, and the second exhaust port of the second compressor to conduct to the first indoor heat exchanger and the third indoor heat exchanger. In this way, after the refrigerant from the first indoor heat exchanger and the third indoor heat exchanger converges with the refrigerant flowing out of the outdoor heat exchanger, it is then split and respectively guided to the second indoor heat exchanger and the fourth indoor heat exchanger, and the refrigerant flowing out of the second indoor heat exchanger and the fourth indoor heat exchanger returns to the first compressor and the second compressor through the first four-way valve. Taking the first indoor unit as an example, in this mode, the high-temperature and high-humidity air in the room first passes through the second indoor heat exchanger. Since the second indoor heat exchanger serves as an evaporator, the refrigerant inside it can absorb the heat of the high-temperature and high-humidity air to cool it down. During the cooling process, the moisture in the air condenses, thus achieving the purpose of condensation dehumidification. The air that has become low-temperature and low-humidity then passes through the first indoor heat exchanger. Since the first indoor heat exchanger serves as a condenser, the refrigerant inside it can condense and release heat to the low-temperature and low-humidity air to increase its temperature, thereby realizing the reheating and dehumidification of the indoor air and avoiding the temperature of the dehumidified air from being too low.

[0090] Optionally, when the user uses the air-conditioning system in winter, in addition to the need for heating, there may also be a need to dehumidify the indoor environment. Since the temperature in winter is relatively low, if the blown air flow is cold air during dehumidification, it will make the user feel uncomfortable cold and even get sick. Therefore, hot air needs to be provided to the room. Through the adjustment in this solution, after the indoor air is condensed and dehumidified, it can be heated, so that the air-conditioning system can provide dry hot air to the space where the first indoor unit and the second indoor unit are located, while increasing the diversity of the air supply of the air-conditioning system and improving the comfort of the user.

[0091] Optionally, in order to improve the operation efficiency and energy efficiency of the air-conditioning system, the air-conditioning system needs to be defrosted. Through the adjustment in this solution, while defrosting in winter, hot air can be delivered to the room, or rather, cold air is not delivered to the room, thereby improving the comfort of the user.

[0092] Optionally, when the first target operation mode and the second target operation mode meet the first preset condition, the opening degree of the outdoor unit throttling device is adjusted to the maximum opening degree. When both the first target operation mode and the second target operation mode are the reheating and dehumidifying modes, the opening degrees of the first throttling device and the third throttling device are adjusted to the maximum opening degrees, the second throttling device is adjusted to the target opening degree according to the target operation temperature of the second indoor heat exchanger, and the fourth throttling device is adjusted to the target opening degree according to the target operation temperature of the fourth indoor heat exchanger, so as to realize the dehumidifying effects of the second indoor heat exchanger and the fourth indoor heat exchanger and the heating effects of the first indoor heat exchanger and the third indoor heat exchanger, and be able to independently control the temperature and humidity, and finally reach the user-set value; when both the first target operation mode and the second target operation mode are the non-stop defrosting modes, the opening degrees of the second throttling device and the fourth throttling device are adjusted to the maximum opening degrees, the first throttling device is adjusted to the target opening degree according to the target operation temperature of the first indoor heat exchanger, and the third throttling device is adjusted to the target opening degree according to the target operation temperature of the third indoor heat exchanger, so as to realize the function of not blowing cold air even during defrosting and improve the comfort of the user; when both the first target operation mode and the second target operation mode are the timed defrosting modes, the first throttling device to the fourth throttling device are adjusted to the target opening degrees according to the target operation temperatures of the indoor heat exchangers connected thereto, and the heat provided to the first indoor unit and the second indoor unit can be controlled, and indirectly control the heat provided to the outdoor heat exchanger, so that the defrosting time can be controlled within the set time.

[0093] Combined with Figure 17 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, including:

[0094] S21, the processor determines the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit in response to a control instruction.

[0095] S22, when both the first target operation mode and the second target operation mode are the timed defrosting modes, the processor obtains the target defrosting duration;

[0096] S23, the processor determines the first defrosting frequency of the first compressor and the second defrosting frequency of the second compressor according to the target defrosting duration, and controls the first compressor to operate at the first defrosting frequency and the second compressor to operate at the second defrosting frequency.

[0097] S24, the processor controls the first valve port of the first four-way valve to be connected to the third valve port and the second valve port to be connected to the fourth valve port, so as to sequentially connect the first compressor, the outdoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the first compressor, the outdoor heat exchanger, and the fourth indoor heat exchanger; at the same time, control the fifth valve port of the second four-way valve to be connected to the eighth valve port and the sixth valve port to be connected to the seventh valve port, so as to sequentially connect the second compressor, the first indoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the second compressor, the third indoor heat exchanger, and the fourth indoor heat exchanger.

[0098] In this solution, the defrosting duration for defrosting the outdoor heat exchanger can be set independently by the user or determined by the air-conditioning system according to the outdoor ambient temperature. Since the outdoor temperature is relatively low in winter, when the air-conditioning system operates in the heating mode, once the ambient temperature is lower than the dew point temperature, condensation will occur on the outdoor heat exchanger. When the outdoor temperature is lower than zero degrees, frosting will occur. Once frosting starts, it will affect the operating efficiency of the air-conditioning system. When the outdoor ambient temperature is higher than the preset ambient temperature and lower than zero degrees, the defrosting duration can be shorter. When the outdoor ambient temperature is higher than the preset ambient temperature, the defrosting duration needs to be longer to ensure the defrosting effect.

[0099] Optionally, if the target defrosting duration is greater than the preset duration, it means that defrosting can be performed for a long time. In order to minimize the impact on indoor temperature regulation during defrosting, make the first defrosting frequency less than the second defrosting frequency, that is, the heat provided to the indoor is greater than the heat used for defrosting. Further, make the first defrosting frequency at least less than half of the second defrosting frequency; if the target defrosting duration is less than or equal to the preset duration, it means that rapid defrosting is required. In order to achieve rapid defrosting, make the first defrosting frequency greater than the second defrosting frequency, that is, the heat used for defrosting is greater than the heat provided to the indoor. Most of the heat is used for defrosting, and the purpose of defrosting can be achieved as soon as possible to improve the energy efficiency and stability of the air-conditioning system when regulating the indoor temperature. Further, make the first defrosting frequency at least twice that of the second defrosting frequency. Optionally, the preset duration can be 5 min, 10 min, 20 min, etc.

[0100] Optionally, when the first target operating mode and the second target operating mode meet the first preset condition, the method for controlling the air-conditioning system further includes: controlling the first throttling device, the second throttling device, the third throttling device, and the fourth throttling device to be all turned on, and controlling the first control valve to be turned on and the second control valve to be turned off.

[0101] Combined with Figure 18 As shown, the embodiments of the present disclosure provide another method for controlling an air conditioner, including:

[0102] S31. The processor determines a first target operation mode of the first indoor unit and a second target operation mode of the second indoor unit in response to a control instruction.

[0103] S32. When the first target operation mode and the second target operation mode meet a second preset condition, the processor regulates the first valve port of the first four-way valve to be connected to the third valve port, and the second valve port and the fourth valve port to be connected, so as to sequentially connect the exhaust port of the first compressor, the outdoor heat exchanger, and the second indoor heat exchanger; at the same time, the processor regulates the fifth valve port of the second four-way valve to be connected to the eighth valve port, and the sixth valve port and the seventh valve port to be connected, so as to sequentially connect the exhaust port of the second compressor, the first indoor heat exchanger, and the second indoor heat exchanger, and to sequentially connect the second compressor, the third indoor heat exchanger, and the second indoor heat exchanger.

[0104] In this solution, when the determined first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit meet the second preset condition, the processor regulates the first valve port of the first four-way valve to be connected to the third valve port, and the second valve port and the fourth valve port to be connected, and regulates the fifth valve port of the second four-way valve to be connected to the eighth valve port, and the sixth valve port and the seventh valve port to be connected, so as to control the conduction directions of the first four-way valve and the second four-way valve, thereby controlling the exhaust port of the first compressor to be conducted to the outdoor heat exchanger, and the exhaust port of the second compressor to be conducted to the first indoor heat exchanger and the third indoor heat exchanger. In this way, after the refrigerant flowing out of the first indoor heat exchanger and the third indoor heat exchanger converges with the refrigerant flowing out of the outdoor heat exchanger, it flows into the second indoor heat exchanger, and the refrigerant flowing out of the second indoor heat exchanger returns to the first compressor and the second compressor through the first four-way valve. During this process, the outdoor heat exchanger, the first indoor heat exchanger, and the third indoor heat exchanger act as condensers, and the second indoor heat exchanger acts as an evaporator, so that the first indoor unit can be used to reheat and dehumidify indoor air or defrost without stopping the machine, and the second indoor unit can be used to heat indoor air.

[0105] Optionally, the first target operation mode and the second target operation mode are determined to meet the second preset condition in the following manner: the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the heating mode; or, the first target operation mode is the defrosting mode without stopping the machine, the second target operation mode is the heating mode, and the outdoor fan is in the stopped state.

[0106] Optionally, when the first target operation mode and the second target operation mode meet the second preset condition, the opening degree of the outdoor unit throttling device is adjusted to the maximum opening degree. When the first target operation mode is the reheating and dehumidifying mode or the non-stop defrosting mode, and the second target operation mode is the heating mode, the opening degrees of the first throttling device and the third throttling device are adjusted to the maximum opening degrees, the second throttling device is adjusted to the target opening degree according to the target operation temperature of the second indoor heat exchanger, and the fourth throttling device is closed, so as to realize the reheating and dehumidifying function of the first indoor unit and the heating function of the second indoor unit, thereby meeting the different needs of users in different rooms.

[0107] Optionally, when the first target operation mode and the second target operation mode meet the second preset condition, the method for controlling the air conditioning system further includes: controlling the first throttling device, the second throttling device, and the third throttling device to be all turned on, turning off the fourth throttling device, and controlling the first control valve to be turned on and the second control valve to be turned off.

[0108] In some embodiments, when the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the cooling mode, control the first port of the first four-way valve to be connected to the third port, and the second port and the fourth port to be connected, so as to sequentially connect the first compressor, the outdoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the first compressor, the outdoor heat exchanger, and the fourth indoor heat exchanger; at the same time, control the fifth port and the eighth port of the second four-way valve to be connected, and the sixth port and the seventh port to be connected, so as to sequentially connect the second compressor, the first indoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the second compressor, the first indoor heat exchanger, and the fourth indoor heat exchanger.

[0109] In this solution, by determining that the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the cooling mode, control the first port of the first four-way valve to be connected to the third port, and the second port and the fourth port to be connected, and control the fifth port and the eighth port of the second four-way valve to be connected, and the sixth port and the seventh port to be connected, so as to control the conduction directions of the first four-way valve and the second four-way valve, thereby controlling the exhaust port of the first compressor to be conducted to the outdoor heat exchanger, the exhaust port of the second compressor to be conducted to the first indoor heat exchanger, the refrigerant flowing out of the first indoor heat exchanger to flow into the second indoor heat exchanger, the refrigerant flowing out of the outdoor heat exchanger to flow into the fourth indoor heat exchanger, and the refrigerant flowing out of the second indoor heat exchanger and the fourth indoor heat exchanger to return to the first compressor and the second compressor through the first four-way valve. In this process, the outdoor heat exchanger and the first indoor heat exchanger act as condensers, and the second indoor heat exchanger and the fourth indoor heat exchanger act as evaporators, so that the first indoor unit can be used to reheat and dehumidify the indoor air, and the second indoor unit can be used to cool the indoor air.

[0110] Optionally, when the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the refrigeration mode, the opening degree of the outdoor unit throttling device is adjusted to the maximum opening degree. When the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the refrigeration mode, the first throttling device and the opening degree are adjusted to the maximum opening degree, the second throttling device is adjusted to the target opening degree according to the target operation temperature of the second indoor heat exchanger, the third throttling device is closed, and the fourth throttling device is adjusted to the target opening degree according to the target operation temperature of the fourth indoor heat exchanger, so as to enable only one room to operate in the refrigeration mode to cool the indoor environment, and the other room can not only cool the indoor environment in the refrigeration mode but also control the humidity within the range set by the user, thereby improving the user's comfort level.

[0111] Optionally, when the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the refrigeration mode, the method for controlling the air conditioning system further includes: regulating and controlling the first throttling device, the second throttling device, and the fourth throttling device to be all turned on, the third throttling device to be turned off, and the first control valve to be turned on and the second control valve to be turned off.

[0112] In some embodiments, when the first target operation mode is the refrigeration mode and the second target operation mode is the heating mode, the first four-way valve is regulated and controlled such that the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port, so as to sequentially connect the first compressor, the fourth indoor heat exchanger, and the first indoor heat exchanger; at the same time, the second four-way valve is regulated and controlled such that the fifth valve port is connected to the seventh valve port, and the sixth valve port is connected to the eighth valve port, so as to sequentially connect the second compressor, the outdoor heat exchanger, and the first evaporator.

[0113] In this solution, by determining that the first target operation mode is the refrigeration mode and the second target operation mode is the heating mode, the first four-way valve is regulated and controlled such that the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port, and the second four-way valve is regulated and controlled such that the fifth valve port is connected to the seventh valve port, and the sixth valve port is connected to the eighth valve port, so that the exhaust port of the first compressor is connected to the fourth indoor heat exchanger, the exhaust port of the second compressor is connected to the outdoor heat exchanger, the refrigerant flowing out of the outdoor heat exchanger and the refrigerant flowing out of the fourth indoor heat exchanger converge and then flow into the first indoor heat exchanger, and the refrigerant flowing out of the first indoor heat exchanger returns to the first compressor and the second compressor 220 through the second four-way valve. During this process, the outdoor heat exchanger serves as a condenser, the first indoor heat exchanger serves as an evaporator to cool the air flowing through the first indoor unit, and the fourth indoor heat exchanger serves as a condenser to heat the air flowing through the second indoor unit.

[0114] Optionally, when the first target operation mode is the cooling mode and the second target operation mode is the heating mode, the opening of the outdoor unit throttling device is adjusted to the maximum opening. When the first target operation mode is the reheat dehumidification mode and the second target operation mode is the cooling mode, the first throttling device is adjusted to the target opening according to the target operation temperature of the first indoor heat exchanger, the second throttling device and the third throttling device are closed, and the opening of the fourth throttling device is adjusted to the maximum opening to realize the cooling function of the first indoor unit and the heating function of the second indoor unit, and can simultaneously control the cooling capacity of the first indoor heat exchanger and the heating capacity of the second indoor heat exchanger.

[0115] Optionally, when the first target operating mode is the cooling mode and the second target operating mode is the heating mode, the method for controlling the air-conditioning system also includes: regulating the first throttling device and the fourth throttling device to be turned on, the second throttling device and the third throttling device to be turned off, and regulating the first control valve to be turned off and the second control valve to be turned on.

[0116] Optionally, when both the first target operation mode and the second target operation mode are cooling mode or fast defrosting mode, the first valve port of the first four-way valve is regulated to be connected to the third valve port, the second valve port is connected to the fourth valve port, so as to connect the exhaust port of the first compressor to the outdoor heat exchanger, and the fifth valve port of the second four-way valve is regulated to be connected to the seventh valve port, and the sixth valve port is connected to the eighth valve port, so as to connect the exhaust port of the second compressor to the outdoor heat exchanger. In this scheme, after the refrigerant flowing out of the outdoor heat exchanger is divided and enters the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger and the first indoor heat exchanger respectively, the refrigerant flowing out of the first indoor heat exchanger and the third indoor heat exchanger returns to the second compressor through the second four-way valve, and the refrigerant flowing out of the second indoor heat exchanger and the fourth indoor heat exchanger returns to the first compressor through the first four-way valve. In this scheme, the outdoor heat exchanger serves as a condenser, and the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger and the fourth indoor heat exchanger serve as evaporators, thereby realizing the regulation of indoor temperature cooling.

[0117] Optionally, when the first target operating mode and the second target operating mode are both cooling modes, the method for controlling the air-conditioning system also includes: regulating the first throttling device, the second throttling device, the third throttling device and the fourth throttling device to be conductive, and regulating the first control valve to be conductive and the second control valve to be conductive.

[0118] Optionally, when both the first target operating mode and the second target operating mode are heating modes, the first four-way valve is adjusted such that the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port, so that the first exhaust port of the first compressor is communicated with the second indoor heat exchanger and the fourth indoor heat exchanger. Also, the second four-way valve is adjusted such that the fifth valve port is connected to the eighth valve port, and the sixth valve port is connected to the seventh valve port, so that the second exhaust port of the second compressor is communicated with the first indoor heat exchanger and the third indoor heat exchanger. In this solution, after the refrigerant flowing out of the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger, and the fourth indoor heat exchanger converges, it flows to the outdoor heat exchanger and then returns to the first compressor and the second compressor through the first four-way valve and the second four-way valve. In this solution, the outdoor heat exchanger serves as an evaporator, and the first indoor heat exchanger, the second indoor heat exchanger, the third indoor heat exchanger, and the fourth indoor heat exchanger all serve as condensers, thereby realizing the adjustment of increasing the indoor temperature.

[0119] Optionally, when both the first target operating mode and the second target operating mode are cooling modes, the method for controlling the air-conditioning system further includes: adjusting all of the first throttling device, the second throttling device, the third throttling device, and the fourth throttling device to be turned on, and adjusting the first control valve to be turned on and the second control valve to be turned on.

[0120] Combined with Figure 19 As shown, an apparatus 90 for controlling an air-conditioning system provided by an embodiment of the present disclosure includes a processor 900 and a memory 901. Optionally, the apparatus may further include a communication interface 902 and a bus 903. Among them, the processor 900, the communication interface 902, and the memory 901 can communicate with each other through the bus 903. The communication interface 902 can be used for information transmission. The processor 900 can call the logical instructions in the memory 901 to execute the method for controlling the air-conditioning system in the above embodiment.

[0121] In addition, when the logical instructions in the above-mentioned memory 901 are implemented in the form of a software functional unit and sold or used as an independent product, they can be stored in a computer-readable storage medium.

[0122] The memory 901, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 900 executes functional applications and data processing by running the program instructions / modules stored in the memory 901, that is, implements the method for controlling the air-conditioning system in the above embodiment.

[0123] The memory 901 may include a program storage area and a data storage area. Among them, the program storage area may store an operating system and application programs required for at least one function; the data storage area may store data created according to the use of the terminal device, etc. In addition, the memory 901 may include a high-speed random access memory and may also include a non-volatile memory.

[0124] The embodiments of the present disclosure provide an air conditioning system, including: an air conditioner main body, and the above-mentioned device for controlling the air conditioning system. The device for controlling the air conditioning system is installed on the air conditioner main body. The installation relationship described here is not limited to being placed inside the product, but also includes the installation connection with other components of the product, including but not limited to physical connection, electrical connection, or signal transmission connection, etc. Those skilled in the art can understand that the device for controlling the air conditioning system can be adapted to a feasible product main body, thereby implementing other feasible embodiments.

[0125] The embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are configured to execute the above-mentioned method for controlling the air conditioning system.

[0126] The above-mentioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transient computer-readable storage medium.

[0127] The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product. This computer software product is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The foregoing storage medium may be a non-transient storage medium, including: various media that can store program codes such as USB flash drives, mobile hard disks, read-only memories (ROM, Read-Only Memory), random access memories (RAM, Random Access Memory), magnetic disks, or optical discs, or may also be a transient storage medium.

[0128] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure, enabling those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process, and other changes. Embodiments only represent possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the terms used in this application are only for describing embodiments and do not limit the claims. As used in the description of embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an", and "the" are intended to also include the plural forms. Similarly, as used in this application, the term "and / or" refers to any and all possible combinations including one or more of the associated listed items. Additionally, when used in this application, the term "comprise" and its variants "comprises" and / or "comprising" etc. mean the presence of the stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or groups thereof. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, or apparatus including the element. In this document, what each embodiment focuses on can be the differences from other embodiments, and the same or similar parts among the embodiments can be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method parts disclosed in the embodiments, the relevant parts can refer to the description of the method parts.

[0129] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner may depend on the specific application and design constraints of the technical solution. The technician can use different methods for each specific application to implement the described functions, but such implementation should not be considered to exceed the scope of the embodiments of the present disclosure. The technician can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, devices, and units can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

[0130] In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units can be merely a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Additionally, the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect coupling or communication connection of devices or units can be in electrical, mechanical, or other forms. The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. Additionally, in the embodiments of the present disclosure, the various functional units can be integrated in one processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit.

[0131] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to the embodiments of the present disclosure. In this regard, each block in the flowchart or block diagram can represent a module, a program segment, or a part of code that contains one or more executable instructions for implementing the specified logical function. In some alternative implementations, the functions marked in the blocks can occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different blocks can also occur in a different order than disclosed in the description. Sometimes, there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, and they can sometimes be executed in the reverse order, which can depend on the functions involved. Each block in the block diagram and / or flowchart, and the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system for performing the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. An air conditioning system, characterized in that, An outdoor unit including an outdoor heat exchanger, a first compressor, and a second compressor, wherein the number of the outdoor heat exchangers is limited to one, and further including: A first indoor unit including a first indoor heat exchanger and a second indoor heat exchanger arranged in parallel; A second indoor unit including a third indoor heat exchanger and a fourth indoor heat exchanger arranged in parallel; A first four-way valve including a first valve port, a second valve port, a third valve port, and a fourth valve port. The first valve port is connected to the first exhaust port of the first compressor, the second valve port is connected to the first intake port of the first compressor, the third valve port is connected to the outdoor heat exchanger, and the fourth valve port is connected to the second indoor heat exchanger and / or the fourth indoor heat exchanger. Wherein, the first valve port is used to be connected to the third valve port, and the second valve port is used to be connected to the fourth valve port to conduct the exhaust port of the first compressor, the outdoor heat exchanger, and the first indoor unit and / or the second indoor unit, and conduct the second indoor heat exchanger and / or the fourth indoor heat exchanger to the intake port of the first compressor; or, the first valve port is used to be connected to the fourth valve port, and the second valve port is used to be connected to the third valve port to conduct the exhaust port of the first compressor and the second indoor heat exchanger and / or the fourth indoor heat exchanger; A second four-way valve including a fifth valve port, a sixth valve port, a seventh valve port, and an eighth valve port. The fifth valve port is connected to the second exhaust port of the second compressor, the sixth valve port is connected to the second intake port of the second compressor, the seventh valve port is connected to the outdoor heat exchanger, and the eighth valve port is connected to the first indoor heat exchanger and / or the third indoor heat exchanger. Wherein, the fifth valve port is used to be connected to the seventh valve port, and the sixth valve port is used to be connected to the eighth valve port to conduct the exhaust port of the second compressor, the outdoor heat exchanger, and the third indoor unit and / or the fourth indoor unit, and conduct the first indoor heat exchanger and / or the third heat exchanger to the intake port of the second compressor; or, the fifth valve port is used to be connected to the eighth valve port, and the sixth valve port is used to be connected to the seventh valve port to conduct the exhaust port of the second compressor and the first indoor heat exchanger and / or the third indoor heat exchanger; Wherein, the connection between the intake port or the exhaust port of the first compressor and the first indoor heat exchanger and / or the second indoor heat exchanger, and the connection between the intake port or the exhaust port of the second compressor and the third indoor heat exchanger and / or the fourth indoor heat exchanger enable the first indoor unit and the second indoor unit to achieve different operating modes.

2. The air conditioning system according to claim 1, wherein Further including: A first throttling device arranged on the first pipeline of the first indoor heat exchanger for conducting or cutting off the first pipeline to enable the first heat exchanger to operate or close; A second throttling device arranged on the second pipeline of the second indoor heat exchanger for conducting or cutting off the second pipeline to enable the second heat exchanger to operate or close; A third throttling device arranged on the third pipeline of the third indoor heat exchanger for conducting or cutting off the third pipeline to enable the second heat exchanger to operate or close; A fourth throttling device arranged on the fourth pipeline of the fourth indoor heat exchanger for conducting or cutting off the fourth pipeline to enable the second heat exchanger to operate or close.

3. The air conditioning system according to claim 1, wherein Further including: A first control valve arranged on the pipeline between the second valve port and the first intake port of the first compressor for connecting or cutting off the pipeline where it is located; The second control valve is disposed on the pipeline between the sixth valve port and the second intake port of the second compressor, and is used to connect or cut off the pipeline where it is located.

4. The air conditioning system according to claim 3, wherein, It further includes: The gas-liquid separator includes an inlet, a first outlet and a second outlet. The inlet is used to communicate with the second valve port, the first outlet is used to communicate with the first intake port of the first compressor, the inlet is further used to communicate with the sixth valve port, and the second outlet is used to communicate with the second intake port of the second compressor. Among them, the first control valve is located on the pipeline between the first inlet and the second valve port, and the second control valve is located on the pipeline between the second inlet and the sixth valve port.

5. The air conditioning system according to claim 4, characterized in that, It further includes: The outdoor unit throttling device is disposed on the pipeline between the outdoor unit and the first indoor unit / second indoor unit, and is used to throttle and depressurize the refrigerant flowing into the outdoor heat exchanger.

6. A method for controlling an air conditioning system, for an air conditioning system according to any one of claims 1 to 5, characterized in that, It includes: In response to the control instruction, determine the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit; According to the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit, adjust the first four-way valve and the second four-way valve so that the first compressor communicates with the first indoor unit and / or the second indoor unit, and the second compressor communicates with the second indoor unit and / or the first indoor unit.

7. The method according to claim 6, characterized in that, The adjusting the first four-way valve and the second four-way valve according to the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit includes: When the first target operation mode and the second target operation mode meet the first preset condition, adjust the first valve port of the first four-way valve to be connected to the third valve port, and the second valve port and the fourth valve port to be connected, so as to sequentially connect the first compressor, the outdoor heat exchanger and the second indoor heat exchanger, and sequentially connect the first compressor, the outdoor heat exchanger and the fourth indoor heat exchanger; at the same time, adjust the fifth valve port and the eighth valve port of the second four-way valve to be connected, and the sixth valve port and the seventh valve port to be connected, so as to sequentially connect the second compressor, the first indoor heat exchanger and the second indoor heat exchanger, and sequentially connect the second compressor, the third indoor heat exchanger and the fourth indoor heat exchanger.

8. The method according to claim 7, wherein Determine that the first target operation mode and the second target operation mode meet the first preset condition in the following manner: Both the first target operation mode and the second target operation mode are the reheating and dehumidifying mode; or, Both the first target operation mode and the second target operation mode are the non-stop defrosting mode and the outdoor fan is in the stopped state; Or, Both the first target operation mode and the second target operation mode are the timed defrosting mode.

9. The method according to claim 8, characterized in that, When both the first target operation mode and the second target operation mode are the timed defrosting mode, the method further includes: Obtain the target defrosting duration; Determine the first defrosting frequency of the first compressor and the second defrosting frequency of the second compressor according to the target defrosting duration, and control the first compressor to operate at the first defrosting frequency and the second compressor to operate at the second defrosting frequency.

10. The method according to claim 7, wherein It further includes: Adjust the first throttling device, the second throttling device, the third throttling device and the fourth throttling device to be all turned on, and adjust the first control valve to be turned on and the second control valve to be turned off.

11. The method according to claim 6, wherein According to the first target operation mode and the second target operation mode, adjust the first four-way valve and the second four-way valve, including: When the first target operation mode and the second target operation mode meet the second preset condition, adjust the first four-way valve so that its first port is connected to the third port, and its second port is connected to the fourth port, so as to sequentially connect the exhaust port of the first compressor, the outdoor heat exchanger, and the second indoor heat exchanger; at the same time, adjust the second four-way valve so that its fifth port is connected to the eighth port, and its sixth port is connected to the seventh port, so as to sequentially connect the exhaust port of the second compressor, the first indoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the second compressor, the third indoor heat exchanger, and the second indoor heat exchanger.

12. The method according to claim 11, wherein Determine whether the first target operation mode and the second target operation mode meet the second preset condition in the following manner: The first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the heating mode; or, The first target operation mode is the non-stop defrosting mode, the second target operation mode is the heating mode, and the outdoor fan is in the stopped state.

13. The method according to claim 11, wherein It further includes: Adjust the first throttling device, the second throttling device, and the third throttling device to be all turned on, turn off the fourth throttling device, and adjust the first control valve to be turned on and the second control valve to be turned off.

14. The method according to claim 6, wherein The adjustment of the first four-way valve and the second four-way valve according to the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit includes: When the first target operation mode is the reheating and dehumidifying mode and the second target operation mode is the refrigeration mode, adjust the first four-way valve so that its first port is connected to the third port, and its second port is connected to the fourth port, so as to sequentially connect the first compressor, the outdoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the first compressor, the outdoor heat exchanger, and the fourth indoor heat exchanger; at the same time, adjust the second four-way valve so that its fifth port is connected to the eighth port, and its sixth port is connected to the seventh port, so as to sequentially connect the second compressor, the first indoor heat exchanger, and the second indoor heat exchanger, and sequentially connect the second compressor, the first indoor heat exchanger, and the fourth indoor heat exchanger.

15. The method according to claim 14, characterized in that, It further includes: Adjust the first throttling device, the second throttling device, and the fourth throttling device to be all turned on, turn off the third throttling device, and adjust the first control valve to be turned on and the second control valve to be turned off.

16. The method according to claim 6, characterized in that, The adjustment of the first four-way valve and the second four-way valve according to the first target operation mode of the first indoor unit and the second target operation mode of the second indoor unit includes: When the first target operation mode is the refrigeration mode and the second target operation mode is the heating mode, adjust the first four-way valve so that its first port is connected to the fourth port, and its second port is connected to the third port, so as to sequentially connect the first compressor, the fourth indoor heat exchanger, and the first indoor heat exchanger; at the same time, adjust the second four-way valve so that its fifth port is connected to the seventh port, and its sixth port is connected to the eighth port, so as to sequentially connect the second compressor, the outdoor heat exchanger, and the first evaporator.

17. The method according to claim 16, wherein It further includes: Adjust the first throttling device and the fourth throttling device to be all turned on, turn off the second throttling device and the third throttling device, and adjust the first control valve to be turned off and the second control valve to be turned on.

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