Air conditioning equipment and control method and control device thereof

Abstract

The invention provides air conditioning equipment and a control method and device thereof. The outdoor unit comprises a compressor, a four-way valve, an outdoor heat exchange assembly, a first middle heat exchange assembly and a second middle heat exchange assembly; the refrigerant pipeline comprises a refrigerant main path, a first branch path and a second branch path, the first branch path and the second branch path are connected in parallel and communicate with the refrigerant main path, a first middle heat exchange assembly and a second middle heat exchange assembly are arranged on the first branch path and the second branch path correspondingly, and an outdoor heat exchange assembly is arranged on the refrigerant main path; a plurality of indoor units; the refrigerant pipeline further comprises a third branch, one end of the third branch is connected to the part, located between the four-way valve and the outdoor heat exchange assembly, of the refrigerant main pipeline, and the other end of the third branch is connected to the second branch. The system cost is reduced, the potential safety hazard of refrigerant leakage is avoided, and the operation efficiency is improved. And the refrigerant only circulates on the outdoor side, expensive copper pipes do not need to be used for long-distance piping from the indoor side to the outdoor side, and the cost is further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliances, and particularly to an air conditioning device, a control method thereof, and a control device thereof. Background Art

[0002] In related technologies, with the reduction of global GWP requirements, how to use different air conditioning devices and refrigerants has become a difficult choice for major enterprises. Traditional air conditioners achieve the purpose of refrigeration or heating through the transportation of media such as refrigerant circulation or water-fluorine heat exchange between the outdoor unit and the indoor unit to meet the air conditioning needs of buildings. In the current solutions for achieving simultaneous refrigeration and heating requirements, the three-pipeline form is mainly adopted. The three-pipeline solution requires a long refrigerant pipe, and the material of this pipe is copper, resulting in high pipeline costs. At the same time, with the gradual popularization and application of new refrigerants R32 and R454B, there are safety hazards such as explosion caused by refrigerant leakage on the inner side. Summary of the Invention

[0003] The present invention provides an air conditioning device, a control method thereof, and a control device thereof, which are used to solve the defects existing in the prior art and achieve the following technical effects: not only reducing the system cost, avoiding the safety hazards of refrigerant leakage, but also improving the operation efficiency. In addition, since the refrigerant only circulates on the outdoor side, expensive copper pipes are not required for the long-distance pipes from the indoor to the outdoor, further reducing the cost.

[0004] An air conditioning device according to an embodiment of the first aspect of the present invention includes: An outdoor unit, including a compressor, a four-way valve, an outdoor heat exchange component, a first intermediate heat exchange component, and a second intermediate heat exchange component connected through a refrigerant pipeline; wherein, the refrigerant pipeline includes a refrigerant main path, a first branch path, and a second branch path. The first branch path and the second branch path are connected in parallel with each other and are both connected to the refrigerant main path, and the first intermediate heat exchange component and the second intermediate heat exchange component are respectively provided on the first branch path and the second branch path, and the outdoor heat exchange component is provided on the refrigerant main path; A plurality of indoor units, each indoor unit includes an indoor heat exchange component connected through a water pipeline, and the water pipeline of each indoor unit can selectively flow through the first intermediate heat exchange component or the second intermediate heat exchange component. A first valve is provided on the first branch path, and a second valve is provided on the second branch path; The refrigerant pipeline further includes a third branch path. One end of the third branch path is connected to a part of the refrigerant main path located between the four-way valve and the outdoor heat exchange component, and the other end of the third branch path is connected to the second branch path. A third valve is further provided on the third branch path; and a fourth valve is further provided on a part of the second branch path between the refrigerant main path and the third branch path.

[0005] According to an embodiment of the present invention, the first valve is a first expansion valve, and a cut-off valve or a check valve is connected in parallel at both ends thereof. The second valve is a second expansion valve, and a cut-off valve or a check valve is connected in parallel at both ends thereof.

[0006] In this way, when throttling by the first expansion valve and the second expansion valve is not required, the cut-off valve or the check valve can be opened to reduce the resistance of the refrigerant flow and ensure the smooth flow of the refrigerant.

[0007] According to an embodiment of the present invention, the heat exchange amount of the first intermediate heat exchange component is greater than or equal to the heat exchange amount of the second intermediate heat exchange component.

[0008] In this way, the design of the first intermediate heat exchange component and the second intermediate heat exchange component takes into account the heat exchange requirements of the system in different operating modes. The heat exchange amount of the first intermediate heat exchange component is designed to be greater than or equal to that of the second intermediate heat exchange component mainly to meet the higher heat exchange requirements during main heating or main cooling.

[0009] According to an embodiment of the present invention, the refrigerant pipeline further includes a fourth branch, which is connected in parallel with both the first intermediate heat exchange component and the second intermediate heat exchange component, and a fifth valve is provided on the fourth branch.

[0010] This design ensures that the system can still maintain good operating efficiency and comfort in winter or low-temperature environments, avoids the decline of heat exchange efficiency caused by frost, reduces the need for manual intervention, and improves the automation degree and maintenance convenience of the system.

[0011] According to an embodiment of the present invention, the outdoor heat exchange component includes a first outdoor heat exchange device and a second outdoor heat exchange device. The refrigerant pipeline further includes a fifth branch and a sixth branch connected in parallel. Both ends of the fifth branch and the sixth branch are connected to the main refrigerant pipeline. The first outdoor heat exchange device and the second outdoor heat exchange device are respectively arranged on the fifth branch and the sixth branch; Preferably, it further includes a first outdoor three-way valve and a second outdoor three-way valve. The first interface of the first outdoor three-way valve is connected to the exhaust port of the compressor through the fifth branch and the main refrigerant pipeline in sequence. The second interface is connected to the first outdoor heat exchange device through the fifth branch. The third interface is connected to the suction port of the compressor through the seventh branch; The first interface of the second outdoor three-way valve is connected to the exhaust port of the compressor through the sixth branch and the main refrigerant pipeline in sequence. The second interface is connected to the second outdoor heat exchange device through the sixth branch. The third interface is connected to the suction port of the compressor through the eighth branch.

[0012] In this way, this design allows the system to selectively activate the first outdoor heat exchange device or the second outdoor heat exchange device, or operate both simultaneously according to different operating requirements and load conditions, so as to optimize energy utilization and system performance.

[0013] A control method for an air conditioning device according to the second aspect embodiment of the present invention, based on the air conditioning device described in the first aspect embodiment of the present invention, includes: Obtain the target working mode and indoor load conditions of each indoor unit, and obtain the outdoor load condition of the outdoor unit; According to the target working mode of each indoor unit, control and adjust the outdoor unit to enter different outdoor working modes; Under different outdoor working modes, according to the indoor load condition and the outdoor load condition, control and adjust the working states of the first intermediate heat exchange component and the second intermediate heat exchange component.

[0014] According to an embodiment of the present invention, the step of controlling and adjusting the outdoor unit to enter different outdoor working modes according to the target working mode of each indoor unit specifically includes: When the target working modes of the operating indoor units are all cooling modes, control the outdoor unit to enter the full cooling mode, and in the full cooling mode, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close; Alternatively, when the target working modes of the operating indoor units are all heating modes, control the outdoor unit to enter the full heating mode, and in the full heating mode, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close; Alternatively, when the target working modes of all indoor units simultaneously include a cooling mode and a heating mode, control the outdoor unit to enter the mixed working mode, and in the mixed working mode, control the first valve, the second valve, and the third valve to open, and control the fourth valve and the fifth valve to close.

[0015] According to an embodiment of the present invention, the heat exchange capacity of the first intermediate heat exchange component is greater than or equal to the heat exchange capacity of the second intermediate heat exchange component; Then the step of controlling and adjusting the working states of the first intermediate heat exchange component and the second intermediate heat exchange component according to the indoor load condition and the outdoor load condition specifically includes: In the full cooling mode or the full heating mode, if the total indoor load of all operating indoor units is less than or equal to any one of the first outdoor load of the first intermediate heat exchange component and the second outdoor load of the second intermediate heat exchange component, then control the first intermediate heat exchange component or the second intermediate heat exchange component to operate, and at this time, control any one of the first valve and the second valve to open; Alternatively, in the full cooling mode or the full heating mode, if the total indoor load of all operating indoor units is less than the first outdoor load of the first intermediate heat exchange component and less than the second outdoor load of the second intermediate heat exchange component, then control the second intermediate heat exchange component to operate, and at this time, control the first valve to close and the second valve to open; Alternatively, in the full cooling mode or the full heating mode, if the total indoor load of all operating indoor units is greater than the first outdoor load of the first intermediate heat exchange component and greater than the second outdoor load of the second intermediate heat exchange component, then control the first intermediate heat exchange component and the second intermediate heat exchange component to operate simultaneously, and at this time, control the first valve and the second valve to open simultaneously; Alternatively, in the full cooling mode or the full heating mode, if the total indoor load of all the indoor units is less than the first outdoor load of the first intermediate heat exchange component and greater than the second outdoor load of the second intermediate heat exchange component, then control the first intermediate heat exchange component to operate, and at this time, control the first valve to open and the second valve to close; Alternatively, in the mixed working mode, obtain the total indoor cooling load and the total indoor heating load of all operating indoor units. If the total indoor cooling load is greater than the total indoor heating load, then control the first intermediate heat exchange component to be in the cooling state and the second intermediate heat exchange component to be in the heating state; Alternatively, in the mixed working mode, obtain the total indoor cooling load and the total indoor heating load of all operating indoor units. If the total indoor cooling load is less than the total indoor heating load, then control the first intermediate heat exchange component to be in the heating state and the second intermediate heat exchange component to be in the cooling state.

[0016] According to an embodiment of the present invention, the control method of the air conditioning device further includes: Receive a work instruction to control entry into the defrosting mode or the anti-freezing mode, and obtain the components to be defrosted or anti-frozen in the air conditioning device; According to the components to be defrosted or anti-frozen, control and adjust the working state of the outdoor unit; Wherein, the components to be defrosted include the outdoor heat exchange component, and the anti-freezing components include the first intermediate heat exchange component and the second intermediate heat exchange component.

[0017] According to an embodiment of the present invention, the step of controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component specifically includes: In the anti-freezing mode; When the anti-freezing component is the first intermediate heat exchange component, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange component to operate in heating mode and the second intermediate heat exchange component to operate in cooling mode; Alternatively, when the anti-freezing component is the second intermediate heat exchange component, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange component to operate in cooling mode and the second intermediate heat exchange component to operate in heating mode; Alternatively, when the anti-freezing component is the first intermediate heat exchange component and / or the second intermediate heat exchange component, control the first valve and / or the second valve and the fourth valve to open, control the third valve and the fifth valve to close, and control the first intermediate heat exchange component and / or the second intermediate heat exchange component to operate in heating mode.

[0018] According to an embodiment of the present invention, the step of controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component specifically includes: In the defrosting mode; When the component to be defrosted is the outdoor heat exchange component, control the fifth valve to open, and control the first valve, the second valve, the third valve, and the fourth valve to close.

[0019] According to an embodiment of the present invention, when the outdoor heat exchange component includes a first outdoor heat exchange device and a second outdoor heat exchange device, the step of controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component specifically includes: In the defrosting mode; When the component to be defrosted is the first outdoor heat exchange device, control the first valve, the second valve, the third valve, the fourth valve, and the fifth valve to close, and control the first interface and the second interface of the first outdoor three-way valve to communicate, and the second interface and the third interface of the second outdoor three-way valve to communicate; Alternatively, when the component to be defrosted is the second outdoor heat exchange device, control the first valve, the second valve, the third valve, the fourth valve, and the fifth valve to close, and control the first interface and the second interface of the second outdoor three-way valve to communicate, and the second interface and the third interface of the first outdoor three-way valve to communicate; Alternatively, when the component to be defrosted is the first outdoor heat exchange device and / or the second outdoor heat exchange device, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close.

[0020] The control device of the air conditioning equipment according to the embodiment of the third aspect of the present invention, based on the embodiment of the first aspect of the present invention, includes: An acquisition module, configured to acquire the target working mode and indoor load conditions of each indoor unit, and acquire the outdoor load condition of the outdoor unit; A first control module, configured to control and adjust the outdoor unit to enter different outdoor working modes according to the target working mode of each indoor unit; A second control module, configured to control and adjust the working states of the first intermediate heat exchange component and the second intermediate heat exchange component according to the indoor load condition and the outdoor load condition in different outdoor working modes.

[0021] The present invention provides an air conditioning equipment, which has at least the following advantages compared with the related art.

[0022] (1) Improved safety: By adopting the water-air heat exchange method instead of the traditional refrigerant directly entering the room, the present invention significantly reduces the safety hazards caused by refrigerant leakage. Especially for the application of new refrigerants R32 and R454B, the potential explosion risk is avoided.

[0023] (2) Cost reduction: Through the water-air heat exchange design of the present invention, the long-distance use of copper pipes as refrigerant pipes is avoided, effectively reducing the material cost. Especially in large multi-connected systems, the saved cost is more significant.

[0024] (3) Optimized resource allocation and efficiency: Through the main road and branch road design of the refrigerant pipeline, the system can flexibly adjust the working states of the first and second intermediate heat exchange components 42 according to the actual load demand, realize the optimal allocation of the refrigerant, and improve the overall efficiency.

[0025] (4) Enhanced flexibility: Each indoor unit can independently select the first or second intermediate heat exchange component 42, which means that even in the case of simultaneous heating and cooling demands, the system can meet the specific needs of each room through reasonable resource allocation. For example, the number of indoor units can be one, two or more, and each indoor unit is independently connected to the intermediate heat exchange component through a water cycle, which allows users to flexibly configure the system according to actual needs and achieve personalized temperature control.

[0026] (5) Enhanced adaptability: The system can adapt to different installation environments and usage requirements. For example, in the case of large cooling capacities, multiple heat exchange components are connected in parallel to meet the high load demand while maintaining the heat exchange efficiency.

[0027] (6) Easy maintenance: Since the refrigerant system and the water system are isolated from each other, maintenance and troubleshooting are simpler, reducing the maintenance cost and time consumption.

[0028] In summary, the air conditioning equipment of the present invention not only reduces the system cost, avoids the safety hazard of refrigerant leakage, but also improves the operation efficiency, especially performs more excellently when dealing with simultaneous cooling and heating requirements. In addition, since the refrigerant only circulates on the outdoor side, expensive copper pipes are not required for the long-distance piping from the indoor to the outdoor, further reducing the cost. Through precise control, the system can ensure that the refrigerant does not enter the indoor space, enhancing the safety and reliability of the equipment, and at the same time simplifying the installation and setting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0030] Figure 1 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the full cooling mode.

[0031] Figure 2 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the full heating mode.

[0032] Figure 3 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the main heating mode.

[0033] Figure 4 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the main cooling mode.

[0034] Figure 5 It is a schematic structural diagram of the air conditioning equipment provided by the present invention in the first defrosting mode.

[0035] Figure 6 It is one of the schematic structural diagrams of the air conditioning equipment provided by the present invention in the second defrosting mode.

[0036] Figure 7 It is the other schematic structural diagram of the air conditioning equipment provided by the present invention in the second defrosting mode.

[0037] Figure 8 It is a schematic flow diagram of the control method of the air conditioning equipment provided by the present invention.

[0038] Figure 9 It is a schematic structural diagram of the control device of the air conditioning equipment provided by the present invention.

[0039] Figure 10 It is a schematic structural diagram of the electronic device provided by the present invention. Description of the Drawings: 1. Compressor; 2. Four-way valve; 3. Outdoor heat exchange assembly; 31. First outdoor heat exchange device; 32. Second outdoor heat exchange device; 41. First intermediate heat exchange assembly; 42. Second intermediate heat exchange assembly; 5. Gas-liquid separator; 6. Oil separator; 7. Main refrigerant path; 71. First branch; 72. Second branch; 73. Third branch; 74. Fourth branch; 75. Fifth branch; 76. Sixth branch; 77. Seventh branch; 78. Eighth branch; 81. First valve; 82. Second valve; 83. Third valve; 84. Fourth valve; 85. Fifth valve; 86. First outdoor three-way valve; 87. Second outdoor three-way valve; 9. Indoor heat exchange assembly; 91. Water pipe; 92. First indoor three-way valve; 93. Second indoor three-way valve. Detailed Embodiment

[0041] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without making creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0042] The following presents an air-conditioning device, as well as a control method and a control device based on the air-conditioning device, provided by the present invention.

[0043] As Figures 1 to 7 shown, the air-conditioning device according to the first aspect embodiment of the present invention includes a plurality of indoor units and outdoor units.

[0044] The outdoor unit includes a compressor 1, a four-way valve 2, an outdoor heat exchange assembly 3, a first intermediate heat exchange assembly 41, and a second intermediate heat exchange assembly 42 connected by a refrigerant pipeline; wherein, the refrigerant pipeline includes a main refrigerant path 7, a first branch 71, and a second branch 72. The first branch 71 and the second branch 72 are connected in parallel with each other and are both connected to the main refrigerant path 7. The first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 are respectively provided on the first branch 71 and the second branch 72, and the outdoor heat exchange assembly 3 is provided on the main refrigerant path 7.

[0045] Each indoor unit includes an indoor heat exchange assembly 9 connected by a water pipe 91. The water pipe 91 of each indoor unit can selectively flow through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42.

[0046] It can be understood that in the present invention, the indoor unit and the outdoor unit are respectively two sets of flow path systems that are independent of each other, not connected to each other, and only have a heat exchange coupling relationship.

[0047] Among them, the outdoor unit is a refrigerant flow path system, and the filler inside is refrigerant (such as R32 or R454B refrigerant). Specifically, inside the outdoor unit, the four interfaces of the four-way valve 2 are respectively connected to the outdoor heat exchange component 3, the confluence of the first branch 71 and the second branch 72, the exhaust port of the compressor 1, and the suction port of the compressor 1 through the refrigerant main path 7. The refrigerant circulates between the compressor 1, the outdoor heat exchange component 3 and the intermediate heat exchange components (including the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42) through the refrigerant main path 7 for refrigeration cycle or heating cycle.

[0048] The indoor unit is a water flow path system, and the filler inside is water. Specifically, the number of indoor units is one, two or more. Each indoor unit includes a water pipe 91 and an indoor heat exchange component 9. The water pipe 91 flows through the intermediate heat exchange components (including the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42) and forms a water circulation loop with the indoor heat exchange component 9. At this time, the water circulation loop can take away the cold or heat in the intermediate heat exchange components (including the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42) and supply cold or heat to the indoor heat exchange component 9, so as to realize the refrigeration or heating of the indoor unit.

[0049] Thus, in the present invention, since the refrigerant (such as R32 or R454B) only circulates in the closed system of the outdoor unit and the indoor unit uses water as the medium, this eliminates the possibility of the refrigerant directly entering the indoor environment, effectively prevents the potential explosion risk caused by refrigerant leakage, and improves the safety of the living or working environment.

[0050] Furthermore, in the present invention, the outdoor unit partially integrates the compressor 1, the four-way valve 2, the outdoor heat exchange component 3, and two key components (the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42), which are connected by a carefully designed refrigerant pipeline system. The refrigerant pipeline is cleverly divided into a main path and two parallel branches, which are respectively connected to the first and second intermediate heat exchange components 42. Such a design endows the system with the ability to flexibly distribute the refrigerant according to different requirements of the operating mode, so as to achieve the optimal performance between the heating and refrigeration modes.

[0051] For example, in the heating mode, the high-temperature and high-pressure refrigerant discharged by the compressor 1 is guided by the four-way valve 2 and first enters the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 to heat the water pipe 91. Thus, the intermediate heat exchange component transfers the heat of the refrigerant to the water in the water pipe 91, and then the water pipe 91 sends the heat to the indoor heat exchange component 9 of the indoor unit, finally providing warmth for the indoor. In the refrigeration mode, the process is opposite. The low-temperature refrigerant in the first intermediate heat exchange component 41 and / or the second intermediate heat exchange component 42 cools the water pipe 91, and then the water pipe 91 sends the cold to the indoor heat exchange component 9 of the indoor unit to achieve the refrigeration effect.

[0052] Each indoor unit has its own indoor heat exchange component 9, and these components are connected through a water pipe network 91. What makes the water pipe 91 special is that it allows each indoor unit to selectively flow through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42. This means that the system can independently control the supply of cold and heat sources according to the actual needs of each indoor unit. Whether it is heating or cooling, the system can accurately match the changes in the indoor environment and provide personalized temperature adjustment.

[0053] As described above, through the design of the main and branch paths of the refrigerant pipes, the system can flexibly adjust the working states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the actual load demand, achieve the optimal distribution of the refrigerant, and improve the overall efficiency. In addition, since each indoor unit can independently select the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42, this means that even when there are simultaneous heating and cooling demands, the system can meet the specific needs of each room through reasonable resource allocation.

[0054] In the related art, with the reduction of the global GWP requirements, how to use different air conditioning equipment and refrigerants has become a difficult choice for major enterprises. Traditional air conditioners achieve the purpose of refrigeration or heating through the refrigerant cycle between the outdoor unit and the indoor unit or the transmission of media such as water-fluorine heat exchange to meet the air conditioning needs of buildings. Currently, the three-pipe form is mainly adopted in the solutions for realizing simultaneous heating and cooling demands. The three-pipe solution requires a long refrigerant pipe, the material of which is copper, and the pipeline cost is high; at the same time, with the gradual popularization and application of new refrigerants R32 and R454B, there are safety hazards such as explosion caused by the leakage of the inner refrigerant.

[0055] Therefore, in order to solve the technical defects existing in the above-mentioned related art, the present invention provides an air conditioning equipment, which has at least the following advantages compared with the related art.

[0056] (1) Improved safety: By adopting the water-air heat exchange method instead of the traditional refrigerant directly entering the room, the present invention significantly reduces the safety hazards caused by refrigerant leakage, especially for the application of new refrigerants R32 and R454B, avoiding potential explosion risks.

[0057] (2) Cost reduction: Through the water-air heat exchange design of the present invention, the use of copper pipes as refrigerant pipes for long distances is avoided, effectively reducing the material cost, especially in large multi-connected air conditioner systems, and the cost saved is more significant.

[0058] (3) Optimize resource allocation and efficiency: Through the design of the main and branch paths of the refrigerant pipeline, the system can flexibly adjust the working states of the first and second intermediate heat exchange components 42 according to the actual load demand, achieve the optimal allocation of the refrigerant, and improve the overall efficiency.

[0059] (4) Enhance flexibility: Each indoor unit can independently select the first or second intermediate heat exchange component 42, which means that even when there are simultaneous heating and cooling demands, the system can meet the specific needs of each room through reasonable resource allocation. For example, the number of indoor units can be one, two, or more, and each indoor unit is independently connected to the intermediate heat exchange component through a water cycle, which allows users to flexibly configure the system according to actual needs and achieve personalized temperature control.

[0060] (5) Enhanced adaptability: The system can adapt to different installation environments and usage requirements. For example, in the case of large cooling capacities, multiple heat exchange components are connected in parallel to meet high-load demands while maintaining heat exchange efficiency.

[0061] (6) Easy maintenance: Since the refrigerant system and the water system are isolated from each other, maintenance and troubleshooting are simpler, reducing maintenance costs and time consumption.

[0062] In summary, the air conditioning equipment of the present invention not only reduces the system cost and avoids the safety hazard of refrigerant leakage, but also improves the operating efficiency, especially performing more outstandingly when dealing with simultaneous heating and cooling demands. In addition, since the refrigerant only circulates on the outdoor side, expensive copper pipes are not required for the long-distance piping from the indoor to the outdoor, further reducing the cost. Through precise control, the system can ensure that the refrigerant does not enter the indoor space, enhancing the safety and reliability of the equipment, and at the same time simplifying the installation and setup process.

[0063] As Figure 1 shown, according to some embodiments of the present invention, a first valve 81 is provided on the first branch 71, and a second valve 82 is provided on the second branch 72.

[0064] In this embodiment, the first valve 81 can control the on-off of the refrigerant in the first branch 71, that is, the first valve 81 can control whether the refrigerant flows through the first intermediate heat exchange component 41, and the second valve 82 can control the on-off of the refrigerant in the second branch 72, that is, the second valve 82 can control whether the refrigerant flows through the second intermediate heat exchange component 42.

[0065] Specifically, on the one hand, the valve can be opened or closed to control whether the refrigerant flows through a specific intermediate heat exchange component. When the valve is closed, the refrigerant cannot pass through, thus preventing the heat exchange process on that branch; when the valve is opened, the refrigerant can flow through and participate in heat exchange, enabling heat to be transferred from the outdoor unit to the indoor unit or vice versa.

[0066] On the other hand, when the system needs to switch from the cooling mode to the heating mode, or adjust the operating mode according to the different requirements (cooling or heating) of the indoor unit, by controlling the on-off states of the first valve 81 and the second valve 82, flexible switching between the intermediate heat exchange components can be achieved, ensuring that the system operates in the most efficient mode according to the requirements.

[0067] In addition, according to the system load, the first valve 81 and the second valve 82 can help adjust the refrigerant distribution, so that the refrigerant flow rate matches the cooling or heating requirements of the indoor unit. For example, in the case of light load, only one valve may need to be opened to allow the refrigerant to flow through one intermediate heat exchange component; while in the case of high load, both valves may need to be opened so that the two intermediate heat exchange components work simultaneously to improve the system efficiency.

[0068] It should also be noted that during maintenance or when a certain heat exchange component fails, the corresponding valve can be closed to isolate the problem component without affecting the operation of the entire system, thereby reducing the downtime and maintenance costs.

[0069] In some specific embodiments, the first valve 81 is a first expansion valve and a cut-off valve or a check valve is connected in parallel at both ends thereof, and the second valve 82 is a second expansion valve and a cut-off valve or a check valve is connected in parallel at both ends thereof.

[0070] In this way, when throttling by the first expansion valve and the second expansion valve is not required, the above-mentioned cut-off valve or check valve can be opened to reduce the resistance of the refrigerant flow and ensure the smooth flow of the refrigerant.

[0071] As Figure 1 shown, according to some embodiments of the present invention, the refrigerant pipeline further includes a third branch 73. One end of the third branch 73 is connected to a part of the refrigerant main path 7 located between the four-way valve 2 and the outdoor heat exchange component 3, the other end of the third branch 73 is connected to the second branch 72, and a third valve 83 is further provided on the third branch 73; and a fourth valve 84 is further provided on a part of the second branch 72 between the refrigerant main path 7 and the third branch 73.

[0072] Wherein, the third valve 83 and the fourth valve 84 are used to realize the conversion between the parallel state and the series state of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42.

[0073] In the air-conditioning system of the present invention, by adding the third branch 73 and the corresponding third and fourth valves 84, the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 can not only work independently, but also be converted between the parallel state and the series state, thereby increasing the flexibility and efficiency of the system. The following will respectively explain the two states of parallel and series, and classify the working modes based on this.

[0074] For exampleFigure 1 and 2 As shown in 2 , in the parallel state, the third valve 83 is closed and the fourth valve 84 is open. This means that the refrigerant in the system can be directly split into the first branch 71 and the second branch 72, and enter the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 respectively. In this mode, the two heat exchange components work independently at the same time, which is suitable for situations where a large amount of refrigerant is required for refrigeration or heating at the same time.

[0075] For another example Figure 3 and Figure 4 As shown in Figure 4 , in the series state, the third valve 83 is open and the fourth valve 84 is closed. At this time, the outdoor heat exchange component 3 is connected in parallel with the second intermediate heat exchange component 42, and both the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are connected in series with the first intermediate heat exchange component 41. Specifically, for example, in Figure 3 the main heating mode, the high-temperature and high-pressure refrigerant flowing out of the compressor first enters the first intermediate heat exchange component 41 through the first branch 71 and heats the water pipe 41. After passing through the first intermediate heat exchange component 41, the refrigerant is divided into two paths. One path of the refrigerant flows through the outdoor heat exchange component 3 and absorbs heat, and the other path of the refrigerant flows through the second intermediate heat exchange component 42 and cools the water pipe 41. Finally, the two paths of refrigerant merge and finally flow into the suction port of the compressor. In this mode, the refrigerant first passes through one heat exchange component and then flows into another, and at the same time realizes the refrigeration effect and the heating effect, which is suitable for occasions where refrigeration and heating need to be realized at the same time and defrosting without stopping the machine.

[0076] Furthermore, since the first branch 71, the second branch 72, and the third branch 73 are provided in the device of the present invention, and valves (including the first valve 81, the second valve 82, the third valve 83, and the fifth valve 85) are correspondingly provided on each branch, therefore, by controlling the opening and closing states of the above-mentioned various valves, the outdoor unit can be switched between multiple different working modes, so as to meet the user's usage requirements of only refrigeration, only heating, and heating and refrigeration at the same time.

[0077] Specifically, the different working modes of the outdoor unit include: full refrigeration mode, full heating mode, main refrigeration mode, and main heating mode.

[0078] For example, in the full refrigeration mode, all indoor units are in the refrigeration state. The system will detect the total load demand and select the on-off states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the load size. If the load is small, only one heat exchange component may be turned on; if the load is large, the parallel mode may be adopted to make the two heat exchange components work at the same time.

[0079] For another example, the full heating mode is similar to the full cooling mode, except that the refrigerant flow direction is opposite. The system selects the most effective heat exchange component operation mode according to the total heating demand to achieve the best heating effect.

[0080] For yet another example, when there are both cooling and heating demands in the indoor unit and the cooling demand is dominant, the system enters the main cooling mode. At this time, the first intermediate heat exchange component 41 may be used for cooling, while the second intermediate heat exchange component 42 is used for heating, specifically depending on the proportion of the cooling and heating demands and the system settings.

[0081] For still another example, conversely, when the heating demand is dominant, the system enters the main heating mode. In this mode, the first intermediate heat exchange component 41 may be used for heating, while the second intermediate heat exchange component 42 is used for cooling to meet the mixed demands of the indoor unit.

[0082] In summary, through the above design, the air conditioning system of the present invention can intelligently adjust the working state of the heat exchange components according to different operating conditions, so as to maximize the utilization of energy and achieve the efficient operation of the system while meeting the indoor temperature adjustment requirements.

[0083] According to some embodiments of the present invention, the heat exchange capacity of the first intermediate heat exchange component 41 is greater than or equal to that of the second intermediate heat exchange component 42.

[0084] The designs of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 are considered in view of the heat exchange requirements of the system in different operating modes. The heat exchange capacity of the first intermediate heat exchange component 41 is designed to be greater than or equal to that of the second intermediate heat exchange component 42 mainly to meet the higher heat exchange requirements in the main heating or main cooling modes. This is because, in the main heating mode, the outdoor unit needs more heat to cope with the heating demand of the indoor unit, while in the main cooling mode, the outdoor unit needs stronger cooling capacity to cope with the cooling demand of the indoor unit. The larger heat exchange capacity of the first intermediate heat exchange component 41 can ensure that the system can effectively handle the higher load in these modes.

[0085] This design takes into account the heat exchange efficiency of the system in different operating modes, namely the full cooling, full heating, main cooling, and main heating modes. In the full cooling or full heating mode, if the load is less than or equal to 50% of the total load, the system can choose to operate any one of the intermediate heat exchange components to save energy; when the load exceeds 50%, both intermediate heat exchange components will operate simultaneously, or only the first intermediate heat exchange component 41 with higher heat exchange capacity can also be turned on to meet the higher heat exchange requirements. In the main cooling or main heating mode, the system will control the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 to operate simultaneously, and select the cooling operation or heating operation of the first intermediate heat exchange component 41 according to the mode to achieve the optimal heat exchange efficiency and energy utilization.

[0086] In addition, considering the low probability that the loads of both the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 reach 50% when refrigeration and heating operate simultaneously, the size difference between the two components is taken into account. By adjusting the sizes of the two heat exchange components, the operating efficiency of the system can be improved under most operating conditions, avoiding waste of resources.

[0087] The technical solution of the present invention optimizes the heat exchange capacity and operating strategy of the intermediate heat exchange component, enabling the system to achieve high efficiency and energy conservation in various operating modes. Especially in the scenario of simultaneous refrigeration and heating demand, the system can intelligently select the appropriate heat exchange component according to the actual load situation, ensuring the flexibility and economy of the system operation. This design not only improves the overall performance of the air conditioning equipment, but also reduces the operating cost to a certain extent and enhances the user experience.

[0088] As Figure 1 shown, according to some embodiments of the present invention, the refrigerant pipeline further includes a fourth branch 74, which is connected in parallel with both the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, and a fifth valve 85 is provided on the fourth branch 74. The fifth valve 85 is used to control whether to defrost the outdoor heat exchange component 3.

[0089] In the air conditioning system of the present invention, the addition of the fourth branch 74 and the setting of the fifth valve 85 are to enhance the flexibility and functionality of the system. Specifically, the fourth branch 74 is connected in parallel with the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, which means it provides an additional path for the refrigerant to bypass these two heat exchange components and directly flow through the fifth valve 85. The purpose of this design is to achieve the defrosting function of the system.

[0090] The defrosting mode is one of the very important functions when the air conditioning system operates in cold weather. When the surface of the outdoor heat exchange component 3 is frosted, it will affect the heat exchange efficiency and thus reduce the performance of the air conditioner. By opening the fifth valve 85 on the fourth branch 74, the refrigerant can bypass the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 and directly enter the outdoor heat exchange component 3 for heating, thereby melting the frost layer on the surface. When the system detects that the surface temperature of the outdoor heat exchange component 3 is too low and reaches the preset defrosting threshold, the controller will automatically open the fifth valve 85 to guide the refrigerant to flow through the outdoor heat exchange component 3 for heating and defrosting.

[0091] Specifically, the operation logic of the defrosting mode is as follows: When the system detects that the defrosting condition is met, it will close the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, and stop the refrigeration or heating operation. The controller opens the fifth valve 85, and the refrigerant flows directly to the outdoor heat exchange component 3 through the fourth branch 74. When the frost layer on the outdoor heat exchange component 3 melts and the temperature returns to the normal range, the system will close the fifth valve 85 again, turn on the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42, and restore the refrigeration or heating function.

[0092] This design ensures that the system can still maintain good operating efficiency and comfort in winter or low-temperature environments, avoids the decline in heat exchange efficiency caused by frost, reduces the need for manual intervention, and improves the automation level and maintenance convenience of the system.

[0093] As Figure 1 shown, according to some embodiments of the present invention, the outdoor heat exchange component 3 includes a first outdoor heat exchange device 31 and a second outdoor heat exchange device 32, and the refrigerant pipeline further includes a fifth branch 75 and a sixth branch 76 connected in parallel. Both ends of the fifth branch 75 and the sixth branch 76 are connected to the refrigerant main path 7, and the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 are respectively arranged on the fifth branch 75 and the sixth branch 76.

[0094] In the present invention, the outdoor heat exchange component 3 is designed to include a first outdoor heat exchange device 31 and a second outdoor heat exchange device 32, which are connected in parallel with each other through the fifth branch 75 and the sixth branch 76 in the refrigerant pipeline. Both ends of the fifth branch 75 and the sixth branch 76 are connected to the refrigerant main path 7, enabling the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 to operate independently or simultaneously, providing higher flexibility and efficiency for the system.

[0095] This design allows the system to selectively activate the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 according to different operating requirements and load conditions, or let both work simultaneously to optimize energy utilization and system performance. Under low load conditions, the system may only use one outdoor heat exchange device to meet the demand and save energy; while under high load conditions, the two outdoor heat exchange devices can work simultaneously to provide additional cooling or heating capacity to ensure the efficient operation of the system.

[0096] In addition, this parallel configuration of outdoor heat exchange devices also improves the redundancy and reliability of the system. If one of the heat exchange devices fails or needs maintenance, the system can still continue to operate through the other heat exchange device, avoiding the possibility of the entire system shutting down and ensuring continuous service and user satisfaction.

[0097] As Figure 6 and Figure 7As shown, in some specific embodiments of the present invention, the outdoor unit further includes a first outdoor three-way valve 86 and a second outdoor three-way valve 87. The first interface of the first outdoor three-way valve 86 is sequentially connected to the exhaust port of the compressor 1 through the fifth branch 75 and the refrigerant main path 7. The second interface is connected to the first outdoor heat exchange device 31 through the fifth branch 75. The third interface is connected to the suction port of the compressor 1 through the seventh branch 77.

[0098] The first interface of the second outdoor three-way valve 87 is sequentially connected to the exhaust port of the compressor 1 through the sixth branch 76 and the refrigerant main path 7. The second interface is connected to the second outdoor heat exchange device 32 through the sixth branch 76. The third interface is connected to the suction port of the compressor 1 through the eighth branch 78.

[0099] Wherein, the first outdoor three-way valve 86 and the second outdoor three-way valve 87 are used to select the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 for defrosting.

[0100] In this embodiment, the first outdoor three-way valve 86 and the second outdoor three-way valve 87 are respectively connected to the exhaust port and the suction port of the compressor 1, and are connected to the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 through different branches, forming a flexible refrigerant circulation path, so as to realize the defrosting of the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32.

[0101] In the defrosting mode, the system will control the on-off states of the first outdoor three-way valve 86 and the second outdoor three-way valve 87 to selectively make the high-temperature refrigerant flow through the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 first, so as to realize the defrosting of a specific heat exchange device. When the second interfaces of the first outdoor three-way valve 86 and the second outdoor three-way valve 87 are activated, the refrigerant will flow through the corresponding outdoor heat exchange device, and use the high-temperature and high-pressure refrigerant generated by the compressor 1 to melt the frost layer on the surface of the heat exchange component, thereby restoring the heat exchange efficiency.

[0102] For example Figure 6 As shown, when the first interface and the second interface of the first outdoor three-way valve 86 are connected, and the second interface and the third interface of the second outdoor three-way valve 87 are connected, the high-temperature refrigerant first flows from the exhaust port of the compressor 1 to the first outdoor heat exchange device 31, so as to defrost the first outdoor heat exchange device 31. The low-temperature refrigerant after defrosting sequentially passes through the second outdoor heat exchange device 32 and the four-way valve 2, and then returns to the suction port of the compressor 1 again to complete a defrosting cycle.

[0103] Another example Figure 7As shown, when the first interface of the second outdoor three-way valve 87 is in communication with the second interface, and the second interface of the first outdoor three-way valve 86 is in communication with the third interface, the high-temperature refrigerant first flows from the exhaust port of the compressor 1 to the second outdoor heat exchange device 32, thereby defrosting the second outdoor heat exchange device 32. The low-temperature refrigerant after defrosting sequentially passes through the first outdoor heat exchange device 31 and the four-way valve 2, and then returns to the suction port of the compressor 1 again to complete a defrosting cycle.

[0104] The advantage of this design is that it allows the system to flexibly select the heat exchange components that need to be defrosted during the defrosting process, without affecting the normal operation of other heat exchange components, improving the overall operation efficiency and stability of the system. In addition, through the intelligent control of the three-way valve, rapid and precise defrosting can be achieved, reducing the defrosting time, lowering energy consumption, and enhancing the user experience.

[0105] As Figure 1 shown, according to some embodiments of the present invention, the water pipe 91 can selectively flow through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 through the first indoor three-way valve 92 and the second indoor three-way valve 93.

[0106] Specifically, the first indoor three-way valve 92 and the second indoor three-way valve 93 are respectively arranged at both ends of the indoor heat exchange component 9. Among them, the three interfaces of the first indoor three-way valve 92 are respectively in communication with the first intermediate heat exchange component 41, the second intermediate heat exchange component 42, and the indoor heat exchange component 9, and the three interfaces of the second indoor three-way valve 93 are respectively in communication with the first intermediate heat exchange component 41, the second intermediate heat exchange component 42, and the indoor heat exchange component 9. In this way, by adjusting the communication situation of the interfaces of the first indoor three-way valve 92 and the second indoor three-way valve 93, the water pipe 91 can selectively flow through the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42, thereby realizing the cooling or heating of the indoor heat exchange component 9 by the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42.

[0107] In other embodiments, the above three-way valve (i.e., the first indoor three-way valve 92 or the second indoor three-way valve 93) can also be replaced by two groups of stop valves to achieve the above-mentioned selective flow relationship of the water pipe 91; in addition, the structure of the three-way valve or the cut-off valve for switching the indoor mechanism between cooling and heating can be arranged in the outdoor unit, can be arranged in the indoor unit, or can be centrally arranged in one or more boxes, which is mainly selected according to the installation convenience and installation cost, and the present invention does not make special limitations here.

[0108] Next, a specific embodiment of the structure of the air-conditioning equipment of the present invention will be described with reference to the accompanying drawings, and each working state and working mode of the air-conditioning equipment will be introduced in detail according to this specific embodiment.

[0109] AsFigures 1 to 7 As shown in the figure, the air conditioning equipment includes an outdoor unit and a plurality of indoor units. The outdoor unit includes a compressor 1, a four-way valve 2, an outdoor heat exchange assembly 3, a first intermediate heat exchange assembly 41, a second intermediate heat exchange assembly 42, a gas-liquid separator 5, and an oil separator 6 connected by refrigerant pipelines. Each indoor unit includes an indoor heat exchange assembly 9 connected by a water pipeline 91. Among them, the water pipeline 91 can selectively flow through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42 through a first indoor three-way valve 92 and a second indoor three-way valve 93.

[0110] The four interfaces of the four-way valve 2 are respectively connected to the outdoor heat exchange assembly 3, the confluence of the first branch 71 and the second branch 72, the exhaust port of the compressor 1, and the suction port of the compressor 1 through the main refrigerant path 7. One end of the third branch 73 is connected to a part of the main refrigerant path 7 located between the four-way valve 2 and the outdoor heat exchange assembly 3, and the other end of the third branch 73 is connected to the second branch 72. A third valve 83 is also provided on the third branch 73; and a fourth valve 84 is also provided on a part of the second branch 72 between the main refrigerant path 7 and the third branch 73. The refrigerant pipeline also includes a fourth branch 74, and the fourth branch 74 is connected in parallel with both the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42, and a fifth valve 85 is provided on the fourth branch 74.

[0111] The outdoor heat exchange assembly 3 includes a first outdoor heat exchange device 31 provided on a fifth branch 75 and a second outdoor heat exchange device 32 provided on a sixth branch 76, and the fifth branch 75 and the sixth branch 76 are connected in parallel and both communicate with the main refrigerant path 7.

[0112] Next, several working modes of the air conditioning equipment described in the above specific embodiments will be introduced with reference to the accompanying drawings.

[0113] (I) Full refrigeration mode: As Figure 1 shown, when the target working mode of all indoor units is the refrigeration mode, the outdoor unit enters the full refrigeration mode. In the full refrigeration mode, at least one of the first valve 81 and the second valve 82 and the fourth valve 84 are opened, and the third valve 83 and the fifth valve 85 are closed.

[0114] In the full refrigeration mode, the outdoor heat exchange assembly 3 serves as a condenser, and the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 are connected in parallel and both serve as evaporators.

[0115] At this time, the refrigerant flow path in the outdoor unit is as follows: The refrigerant flows out from the exhaust port of the compressor 1, enters the outdoor heat exchange assembly 3 (including the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32 connected in parallel) through the four-way valve 2, and becomes a low-temperature refrigerant after condensing and releasing heat in the outdoor heat exchange assembly 3. After flowing out of the outdoor heat exchange assembly 3, if both the first valve 81 and the second valve 82 are opened, the low-temperature refrigerant is divided into two parts and enters the first branch 71 and the second branch 72 respectively, and evaporates and absorbs heat in the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 respectively, so as to cool the indoor unit; if one of the first valve 81 and the second valve 82 is opened, the low-temperature refrigerant all enters the first branch 71 or the second branch 72, and all flows through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42 to evaporate and absorb heat, so as to cool the indoor unit.

[0116] Finally, after the refrigerant flows out from the first intermediate heat exchange assembly 41 and / or the second intermediate heat exchange assembly 42, it returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigeration cycle.

[0117] It should be noted that the opening and closing conditions of the above first valve 81 and second valve 82 can be controlled according to the load ranges of the indoor unit and the outdoor unit, which will be introduced in detail below, so it will not be elaborated here.

[0118] (2) Full heating mode: As Figure 2 shown, when the target operating modes of all indoor units are heating modes, the outdoor unit enters the full heating mode, and in the full heating mode, at least one of the first valve 81 and the second valve 82 and the fourth valve 84 are opened, and the third valve 83 and the fifth valve 85 are closed.

[0119] In the full heating mode, the outdoor heat exchange assembly 3 serves as an evaporator, and the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 are connected in parallel and both serve as condensers.

[0120] At this time, the refrigerant flow path in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1, passes through the four-way valve 2 and enters the intermediate heat exchange assembly to condense and release heat. Among them, if both the first valve 81 and the second valve 82 are opened, the high-temperature refrigerant is divided into two parts and enters the first branch 71 and the second branch 72 respectively, and condenses and releases heat in the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42 respectively, so as to heat the indoor unit; if one of the first valve 81 and the second valve 82 is opened, the high-temperature refrigerant all enters the first branch 71 or the second branch 72, and all flows through the first intermediate heat exchange assembly 41 or the second intermediate heat exchange assembly 42 to condense and release heat, so as to heat the indoor unit. The high-temperature refrigerant becomes a low-temperature refrigerant after flowing out of the intermediate heat exchange assembly, and the low-temperature refrigerant flows through the outdoor heat exchange assembly 3 and evaporates and absorbs heat.

[0121] Finally, after the refrigerant flows out of the outdoor heat exchange assembly 3, it returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a heating cycle.

[0122] It should be noted that the opening and closing conditions of the above-mentioned first valve 81 and second valve 82 can be controlled according to the load ranges of the indoor unit and the outdoor unit, which will be introduced in detail below, so it will not be elaborated here.

[0123] (3) Hybrid working mode (main heating mode): As Figure 3 shown, when the target working modes of all indoor units simultaneously include the cooling mode and the heating mode, if the heating load of the air conditioning equipment is greater than its cooling load, the outdoor unit enters the main heating mode in the hybrid working mode, and in the main heating mode, the first valve 81, the second valve 82, and the third valve 83 are opened, and the fourth valve 84 and the fifth valve 85 are closed.

[0124] In the main heating mode, the heat exchange amount of the first intermediate heat exchange assembly 41 is greater than that of the second intermediate heat exchange assembly 42. At this time, the outdoor heat exchange assembly 3 and the second intermediate heat exchange assembly 42 are in parallel and both act as evaporators, and the first intermediate heat exchange assembly 41 acts as a condenser. It can be understood that in the above-mentioned main heating mode, the heat exchange amount of the outdoor heat exchange assembly 3 plus the cooling load of the air conditioning equipment is equal to the heating load of the air conditioning equipment.

[0125] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out of the exhaust port of the compressor 1, and after passing through the four-way valve 2, the high-temperature refrigerant sequentially flows through the refrigerant main path 7 and the first branch path 71 and enters the first intermediate heat exchange assembly 41 to release heat by condensation, so as to heat a part of the indoor units corresponding to the first intermediate heat exchange assembly 41.

[0126] After flowing out of the first intermediate heat exchange assembly 41, the high-temperature refrigerant becomes low-temperature refrigerant. Among them, a part of the low-temperature refrigerant flows into the second intermediate heat exchange assembly 42 through the second branch path 72 to absorb heat by evaporation, so as to cool a part of the indoor units corresponding to the second intermediate heat exchange assembly 42. After flowing out of the second intermediate heat exchange assembly 42, this part of the refrigerant converges into the refrigerant main path 7 through the third branch path 73; another part of the low-temperature refrigerant flows into the outdoor heat exchange assembly 3 through the refrigerant main path 7 to absorb heat by evaporation. After flowing out of the outdoor heat exchange assembly 3, this part of the refrigerant converges with the refrigerant in the third branch path 73 into the refrigerant main path 7. Finally, the refrigerant returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigerant cycle.

[0127] (4) Hybrid working mode (main cooling mode): As Figure 4As shown, when the target operating modes of all indoor units simultaneously include the cooling mode and the heating mode, if the cooling load of the air conditioning equipment is greater than its heating load, the outdoor unit enters the main cooling mode in the hybrid operating mode. In the main cooling mode, the first valve 81, the second valve 82, and the third valve 83 are opened, and the fourth valve 84 and the fifth valve 85 are closed.

[0128] In the main cooling mode, the heat exchange amount of the first intermediate heat exchanger is greater than that of the second intermediate heat exchange component 42. At this time, the outdoor heat exchange component 3 and the second intermediate heat exchange component 42 are in parallel and both act as condensers, and the first intermediate heat exchange component 41 acts as an evaporator. It can be understood that in the above-mentioned main cooling mode, the heat exchange amount of the outdoor heat exchange component 3 plus the heating load of the air conditioning equipment is equal to the cooling load of the air conditioning equipment.

[0129] At this time, the flow path of the refrigerant in the outdoor unit is as follows: The high-temperature refrigerant flows out from the exhaust port of the compressor 1. After passing through the four-way valve 2, the high-temperature refrigerant is divided into two paths. One path of the high-temperature refrigerant flows through the outdoor heat exchange component 3 to condense and release heat, and the other path of the high-temperature refrigerant flows through the second intermediate heat exchange component 42 through the third branch 73 to condense and release heat, so as to heat a part of the indoor unit corresponding to the second intermediate heat exchange component 42. After the two paths of high-temperature refrigerant condense and release heat, they become low-temperature refrigerant and converge to the first branch 71. The low-temperature refrigerant flows through the first intermediate heat exchange component 41 to evaporate and absorb heat, so as to cool a part of the indoor unit corresponding to the first intermediate heat exchange component 41.

[0130] Finally, after the refrigerant flows out of the first intermediate heat exchange component 41, it returns to the suction port of the compressor 1 through the four-way valve 2 again to complete a refrigerant cycle.

[0131] (V) The first defrosting mode: As Figure 5 shown, when it is detected that the outdoor heat exchange component 3 is frosted due to too low temperature, the outdoor unit enters the first defrosting mode for defrosting the outdoor heat exchange component 3. In the first defrosting mode, the fourth valve 84 and the fifth valve 85 are opened, and the first valve 81, the second valve 82, and the third valve 83 are closed.

[0132] The flow path of the refrigerant is as follows: The high-temperature refrigerant flows from the exhaust port of the compressor 1 to the four-way valve 2, enters the outdoor heat exchange component 3 through the four-way valve 2, so as to heat and defrost the outdoor heat exchange component 3. The defrosted low-temperature refrigerant returns to the suction port of the compressor 1 through the fourth branch 74 and the four-way valve 2 in sequence to complete a defrosting cycle.

[0133] (VI) The second defrosting mode: As Figure 6 and Figure 7As shown, when the outdoor unit includes the first outdoor three-way valve 86 and the second outdoor three-way valve 87, the outdoor unit further has a second defrosting mode. At this time, the first valve 81, the second valve 82, the third valve 83, the fourth valve 84, and the fifth valve 85 are all closed. In the second defrosting mode, the system can achieve targeted defrosting of the first outdoor heat exchange device 31 or the second outdoor heat exchange device 32 by controlling the interface connection relationship of the first outdoor three-way valve 86 and the second outdoor three-way valve 87.

[0134] For example Figure 6 As shown, when the first interface of the first outdoor three-way valve 86 is connected to the second interface, and the second interface of the second outdoor three-way valve 87 is connected to the third interface, the system performs targeted defrosting on the first outdoor heat exchange device 31.

[0135] Another example Figure 7 As shown, when the first interface of the second outdoor three-way valve 87 is connected to the second interface, and the second interface of the first outdoor three-way valve 86 is connected to the third interface, the system performs targeted defrosting on the second outdoor heat exchange device 32.

[0136] (7) Anti-freezing mode: The anti-freezing mode is a mode in which one of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 generates heat and the other generates cold. The connection relationship and refrigerant flow path of the anti-freezing mode are similar to those of the above-mentioned main heating mode or main cooling mode, and will not be elaborated herein.

[0137] It should be noted that the application scenario of the anti-freezing mode is: when it is detected that the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 has a risk of freezing due to too low temperature, the outdoor unit performs anti-freezing operation (i.e., heating) on the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42.

[0138] Next, the control method, control device, and air-conditioning equipment of the present invention will be described with reference to the accompanying drawings. Among them, before describing the embodiments of the present invention in detail, the entire application scenario will be described first. The control method, control device, electronic device, and computer-readable storage medium of the air-conditioning equipment in the embodiments of the present invention can be applied not only to the local area of the air-conditioning equipment, but also to the cloud platform in the Internet field, or the cloud platform in other types of Internet fields, or can also be applied to third-party devices. Among them, the third-party devices may include various different types such as mobile phones, tablet computers, notebooks, in-vehicle computers, and other intelligent terminals.

[0139] Next, only the control method applicable to the air-conditioning equipment will be used as an example for illustration. It should be understood that the control method of the embodiments of the present invention can also be applied to the cloud platform and third-party devices.

[0140] Such as Figure 8As shown, the control method of the air conditioning equipment according to the second aspect embodiment of the present invention includes: Step S1, obtain the target working mode and indoor load conditions of each indoor unit, and obtain the outdoor load condition of the outdoor unit

[0141] Step S2, control and adjust the outdoor unit to enter different outdoor working modes according to the target working mode of each indoor unit; Step S3, under different outdoor working modes, control and adjust the working states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the indoor load condition and the outdoor load condition.

[0142] The specific working process and principle of the control method of the air conditioning equipment according to the embodiment of the present invention are as follows: First, the air conditioning equipment will collect the target working mode (i.e., the cooling or heating mode set by the user) of each indoor unit and the indoor load conditions (such as indoor temperature, humidity, human activities, etc.). At the same time, the system will also obtain the outdoor load condition of the outdoor unit, which usually includes environmental parameters such as external temperature, humidity, and solar radiation intensity. These data are crucial for determining the working mode of the outdoor unit.

[0143] According to the collected target working mode of the indoor unit, the system will intelligently judge and control the outdoor unit to enter different working modes. For example, if all indoor units require the cooling mode, the outdoor unit will be adjusted to the full cooling mode. At this time, the main task of the outdoor unit is to transfer heat from the indoor to the outdoor through the compressor 1 and the outdoor heat exchange component 3. On the contrary, if the indoor unit requires heating, the outdoor unit will enter the full heating mode. At this time, the outdoor unit absorbs heat from the outside through reverse circulation and transfers it to the indoor.

[0144] After determining the working mode of the outdoor unit, the system will dynamically adjust the working states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the real-time indoor load condition and outdoor load condition. For example, in the main cooling mode, if the cooling demand of the indoor unit is greater than the heating demand, the system will make the first intermediate heat exchange component 41 operate in the cooling mode, while the second intermediate heat exchange component 42 may operate in the heating mode to meet the personalized needs of different indoor units. The system will intelligently select whether to start one of the intermediate heat exchange components, or make both work simultaneously, or even adjust the operation load ratio of the two according to the operation load of the indoor unit and the outdoor environmental conditions to achieve the optimal balance of energy utilization and comfort.

[0145] In summary, the air conditioner control method of the present invention realizes refined management of the cooling and heating demands in a multi-connected system by collecting and analyzing the indoor and outdoor load conditions in real time, and intelligently regulating the operating mode of the outdoor unit and the operating state of the intermediate heat exchange component. This method not only improves the energy utilization efficiency, but also enhances the flexibility and response speed of the system, ensuring a comfortable experience for users under different environmental conditions. By avoiding the direct entry of refrigerant into the room, the safety risk is effectively reduced, and the safety and reliability of the overall system operation are improved.

[0146] According to some embodiments of the present invention, the step of controlling and adjusting the outdoor unit to enter different outdoor operating modes according to the target operating modes of each indoor unit specifically includes: When the target operating modes of all the running indoor units are cooling modes, control the outdoor unit to enter the full cooling mode. And in the full cooling mode, control the first valve 81 and / or the second valve 82 and the fourth valve 84 to open, and control the third valve 83 and the fifth valve 85 to close; Or, when the target operating modes of all the running indoor units are heating modes, control the outdoor unit to enter the full heating mode. And in the full heating mode, control the first valve 81 and / or the second valve 82 and the fourth valve 84 to open, and control the third valve 83 and the fifth valve 85 to close; Or, when the target operating modes of the running indoor units include both cooling modes and heating modes at the same time, control the outdoor unit to enter the mixed operating mode. And in the mixed operating mode, control the first valve 81, the second valve 82, and the third valve 83 to open, and control the fourth valve 84 and the fifth valve 85 to close.

[0147] According to some embodiments of the present invention, if the heat exchange amount of the first intermediate heat exchange component 41 is greater than or equal to the heat exchange amount of the second intermediate heat exchange component 42, then the step of controlling and adjusting the operating states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the indoor load condition and the outdoor load condition specifically includes: In the full cooling mode or the full heating mode, if the total indoor load of all the running indoor units is less than or equal to any one of the first outdoor load of the first intermediate heat exchange component 41 and the second outdoor load of the second intermediate heat exchange component 42, then control the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42 to operate. At this time, control any one of the first valve 81 and the second valve 82 to open; In the full cooling mode or the full heating mode, if the total indoor load of all the running indoor units is greater than the first outdoor load of the first intermediate heat exchange component 41 and greater than the second outdoor load of the second intermediate heat exchange component 42, then control the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 to operate simultaneously. At this time, control the first valve 81 and the second valve 82 to open simultaneously; In the full cooling mode or the full heating mode, if the total indoor load of all operating indoor units is less than the first outdoor load of the first intermediate heat exchange component 41 and less than the second outdoor load of the second intermediate heat exchange component 42, then control the second intermediate heat exchange component 42 to operate. At this time, control the first valve 81 to close and the second valve 82 to open; In the full cooling mode or the full heating mode, if the total indoor load of all operating indoor units is less than the first outdoor load of the first intermediate heat exchange component 41 and greater than the second outdoor load of the second intermediate heat exchange component 42, then control the first intermediate heat exchange component 41 to operate. At this time, control the first valve 81 to open and the second valve 82 to close; In the mixed working mode, obtain the total indoor cooling load and the total indoor heating load of all operating indoor units. If the total indoor cooling load is greater than its total indoor heating load, then control the first intermediate heat exchange component 41 to be in the cooling state and the second intermediate heat exchange component 42 to be in the heating state; In the mixed working mode, obtain the total indoor cooling load and the total indoor heating load of all operating indoor units. If the total indoor cooling load is less than its total indoor heating load, then control the first intermediate heat exchange component 41 to be in the heating state and the second intermediate heat exchange component 42 to be in the cooling state.

[0148] In the above embodiments, for the full cooling / full heating mode: when the total indoor load of all operating indoor units does not exceed the heat exchange capacity of the first intermediate heat exchange component 41 or the second intermediate heat exchange component 42, only one of the heat exchange components is turned on. At this time, the first valve 81 or the second valve 82 connected to this component is opened, while the other valve is closed.

[0149] If the total indoor load exceeds the individual heat exchange capacity of any one of the heat exchange components, the system will start both the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 at the same time. At this time, the first valve 81 and the second valve 82 are opened simultaneously to jointly bear the cooling or heating load.

[0150] For the mixed working mode: when the cooling demand of the indoor unit is higher than the heating demand, the system sets the first intermediate heat exchange component 41 to the cooling mode and the second intermediate heat exchange component 42 to the heating mode to adapt to the cooling and heating demands of different indoor units.

[0151] On the contrary, if the heating demand of the indoor unit is higher than the cooling demand, the first intermediate heat exchange component 41 will be set to the heating mode, while the second intermediate heat exchange component 42 is set to the cooling mode, also meeting the efficient operation under the mixed demand.

[0152] In this way, through the above control strategy, the system can intelligently allocate and adjust the operating states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 under different operating modes to meet the cooling or heating requirements of the indoor unit, while optimizing energy utilization and improving the operating efficiency and energy-saving effect of the overall system. This control method makes full use of the large heat exchange capacity of the first intermediate heat exchange component 41 and the auxiliary ability of the second intermediate heat exchange component 42, ensuring the flexibility and adaptability of the system in the face of complex load conditions.

[0153] According to some embodiments of the present invention, the control method of the air conditioning device further includes: Receiving a work instruction to control entry into the defrost mode or the anti-freezing mode, and acquiring the component to be defrosted or the anti-freezing component in the air conditioning device; Controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component.

[0154] Among them, the component to be defrosted includes the outdoor heat exchange component, and the anti-freezing component includes the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42.

[0155] In some specific embodiments, the step of controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component specifically includes: In the defrost mode; When the component to be defrosted is the outdoor heat exchange component 3, controlling the fifth valve 85 to open and controlling the first valve 81, the second valve 82, the third valve 83, and the fourth valve 84 to close. At this time, the outdoor unit is in the first defrost mode.

[0156] In still some other specific embodiments, when the outdoor heat exchange component 3 includes the first outdoor heat exchange device 31 and the second outdoor heat exchange device 32, and the outdoor unit further includes the first outdoor three-way valve 86 and the second outdoor three-way valve 87, the step of controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component specifically includes: In the defrost mode; When the component to be defrosted is the first outdoor heat exchange device 31, controlling the first valve 81, the second valve 82, the third valve 83, the fourth valve 84, and the fifth valve 85 to all close, and controlling the first interface and the second interface of the first outdoor three-way valve 86 to communicate, and the second interface and the third interface of the second outdoor three-way valve 87 to communicate. At this time, the outdoor unit is in the second defrost mode.

[0157] Alternatively, when the component to be defrosted is the second outdoor heat exchange device 32, control the first valve 81, the second valve 82, the third valve 83, the fourth valve 84, and the fifth valve 85 to be all closed, and control the first interface and the second interface of the second outdoor three-way valve 87 to be communicated, and the second interface and the third interface of the first outdoor three-way valve 86 to be communicated. At this time, the outdoor unit is in the second defrosting mode.

[0158] Alternatively, when the component to be defrosted is the first outdoor heat exchange device 31 and / or the second outdoor heat exchange device 32, control the first valve 81 and / or the second valve 82 and the fourth valve 84 to be opened, and control the third valve 83 and the fifth valve 85 to be closed.

[0159] In some other specific embodiments, the step of controlling and adjusting the operating state of the outdoor unit according to the component to be defrosted or the anti-freezing component specifically further includes: In the anti-freezing mode, when the anti-freezing components are the first intermediate heat exchange assembly 41 and the second intermediate heat exchange assembly 42, control the outdoor unit to enter the anti-freezing mode. At this time, the internal connection relationship of the outdoor unit is similar to that in the main heating mode or the main cooling mode, and the present invention will not elaborate herein.

[0160] For example, when the anti-freezing component is the first intermediate heat exchange assembly 41, control the first valve 81, the second valve 82, and the third valve 83 to be opened and the fourth valve 84 to be closed, and control the first intermediate heat exchange assembly 41 to operate in heating and the second intermediate heat exchange assembly 42 to operate in cooling.

[0161] For another example, when the anti-freezing component is the second intermediate heat exchange assembly 42, control the first valve 81, the second valve 82, and the third valve 83 to be opened and the fourth valve 84 to be closed, and control the first intermediate heat exchange assembly 41 to operate in cooling and the second intermediate heat exchange assembly 42 to operate in heating.

[0162] For yet another example, when the anti-freezing components are the first intermediate heat exchange assembly 41 and / or the second intermediate heat exchange assembly 42, control the first valve 81 and / or the second valve 82 and the fourth valve 84 to be opened, control the third valve 83 and the fifth valve 85 to be closed, and control the first intermediate heat exchange assembly 41 and / or the second intermediate heat exchange assembly 42 to operate in heating.

[0163] As Figure 9 shown, the control device of the air conditioning equipment according to the third aspect embodiment of the present invention includes: An acquisition module 110, configured to acquire the target operating mode and indoor load condition of each indoor unit, and acquire the outdoor load condition of the outdoor unit; A first control module 120, configured to control and adjust the outdoor unit to enter different outdoor operating modes according to the target operating mode of each indoor unit; The second control module 130 is configured to control and adjust the operating states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the indoor load condition and the outdoor load condition under different outdoor operating modes.

[0164] Figure 10 An entity structure diagram of an electronic device is exemplified, such as Figure 10 shown. The electronic device may include: a processor 810, a communications interface 820, a memory 830, and a communication bus 840. Among them, the processor 810, the communications interface 820, and the memory 830 complete mutual communication through the communication bus 840. The processor 810 can call the logic instructions in the memory 830 to execute the control method of the air conditioning device, including: obtaining the target operating mode and the indoor load condition of each indoor unit, and obtaining the outdoor load condition of the outdoor unit; controlling and adjusting the outdoor unit to enter different outdoor operating modes according to the target operating mode of each indoor unit; under different outdoor operating modes, controlling and adjusting the operating states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the indoor load condition and the outdoor load condition.

[0165] In addition, when the logic instructions in the above-mentioned memory 830 can be implemented in the form of software functional units and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several 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 methods of the various embodiments of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk, or an optical disc that can store program codes.

[0166] On the other hand, the present invention also provides a computer program product. The computer program product includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the control method of the air-conditioning device provided by the above-mentioned various methods, including: obtaining the target working modes and indoor load conditions of each indoor unit, and obtaining the outdoor load condition of the outdoor unit; controlling and adjusting the outdoor unit to enter different outdoor working modes according to the target working modes of each indoor unit; and controlling and adjusting the working states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the indoor load condition and the outdoor load condition under different outdoor working modes.

[0167] In another aspect, the present invention also provides a non-transitory computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, it realizes the control method of the air-conditioning device provided by the above-mentioned various methods, including: obtaining the target working modes and indoor load conditions of each indoor unit, and obtaining the outdoor load condition of the outdoor unit; controlling and adjusting the outdoor unit to enter different outdoor working modes according to the target working modes of each indoor unit; and controlling and adjusting the working states of the first intermediate heat exchange component 41 and the second intermediate heat exchange component 42 according to the indoor load condition and the outdoor load condition under different outdoor working modes.

[0168] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0169] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods of each embodiment or some parts of the embodiments.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air conditioning device, characterized in that, Comprising: An outdoor unit, including a compressor, a four-way valve, an outdoor heat exchange component, a first intermediate heat exchange component, and a second intermediate heat exchange component connected by refrigerant pipes; wherein, the refrigerant pipes include a main refrigerant path, a first branch, and a second branch, the first branch and the second branch are connected in parallel with each other and both communicate with the main refrigerant path, and the first intermediate heat exchange component and the second intermediate heat exchange component are respectively provided on the first branch and the second branch, and the outdoor heat exchange component is provided on the main refrigerant path; A plurality of indoor units, each indoor unit includes an indoor heat exchange component connected by a water pipe, and the water pipe of each indoor unit can selectively flow through the first intermediate heat exchange component or the second intermediate heat exchange component. A first valve is provided on the first branch, and a second valve is provided on the second branch; The refrigerant pipe further includes a third branch, one end of the third branch is connected to a part of the main refrigerant path between the four-way valve and the outdoor heat exchange component, the other end of the third branch is connected to the second branch, and a third valve is further provided on the third branch; and a fourth valve is further provided on a part of the second branch between the main refrigerant path and the third branch.

2. The air-conditioning equipment according to claim 1, wherein, The heat exchange capacity of the first intermediate heat exchange component is greater than or equal to the heat exchange capacity of the second intermediate heat exchange component.

3. The air conditioning equipment according to claim 1, characterized in that The refrigerant pipe further includes a fourth branch, the fourth branch is connected in parallel with the first intermediate heat exchange component and the second intermediate heat exchange component at the same time, and a fifth valve is provided on the fourth branch.

4. The air-conditioning device according to claim 1, wherein, The first valve is a first expansion valve and a cut-off valve or a check valve is connected in parallel at both ends thereof, and the second valve is a second expansion valve and a cut-off valve or a check valve is connected in parallel at both ends thereof.

5. The air-conditioning device according to any one of claims 1 to 4, characterized in that The outdoor heat exchange component includes a first outdoor heat exchange device and a second outdoor heat exchange device, the refrigerant pipe further includes a fifth branch and a sixth branch connected in parallel with each other, both ends of the fifth branch and the sixth branch are connected to the main refrigerant path, and the first outdoor heat exchange device and the second outdoor heat exchange device are respectively provided on the fifth branch and the sixth branch.

6. The air conditioning equipment according to claim 5, characterized in that, It further includes a first outdoor three-way valve and a second outdoor three-way valve. The first interface of the first outdoor three-way valve is sequentially connected to the exhaust port of the compressor through the fifth branch and the main refrigerant path, the second interface is connected to the first outdoor heat exchange device through the fifth branch, and the third interface is connected to the suction port of the compressor through the seventh branch; The first interface of the second outdoor three-way valve is sequentially connected to the exhaust port of the compressor through the sixth branch and the main refrigerant path, the second interface is connected to the second outdoor heat exchange device through the sixth branch, and the third interface is connected to the suction port of the compressor through the eighth branch.

7. A control method for an air conditioning device according to any one of claims 1 to 6, characterized in that, Comprising: Obtain the target working mode and indoor load conditions of each indoor unit, and obtain the outdoor load conditions of the outdoor unit; According to the target working mode of each indoor unit, control and adjust the outdoor unit to enter different outdoor working modes; Under different outdoor working modes, according to the indoor load conditions and the outdoor load conditions, control and adjust the working states of the first intermediate heat exchange component and the second intermediate heat exchange component.

8. The control method of the air conditioning equipment according to claim 7, characterized in that, The step of controlling and adjusting the outdoor unit to enter different outdoor operating modes according to the target operating modes of each indoor unit specifically includes: When the target operating modes of all the running indoor units are cooling modes, control the outdoor unit to enter the full cooling mode. And in the full cooling mode, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close; Or, when the target operating modes of all the running indoor units are heating modes, control the outdoor unit to enter the full heating mode. And in the full heating mode, control the first valve and / or the second valve and the fourth valve to open, and control the third valve and the fifth valve to close; Or, when the target operating modes of the running indoor units include both cooling mode and heating mode at the same time, control the outdoor unit to enter the mixed operating mode. And in the mixed operating mode, control the first valve, the second valve and the third valve to open, and control the fourth valve and the fifth valve to close.

9. The control method of the air conditioning equipment according to claim 8, wherein The heat exchange amount of the first intermediate heat exchange component is greater than or equal to the heat exchange amount of the second intermediate heat exchange component; Then the step of controlling and adjusting the operating states of the first intermediate heat exchange component and the second intermediate heat exchange component according to the indoor load condition and the outdoor load condition specifically includes: In the full cooling mode or the full heating mode, if the total indoor load of all the running indoor units is less than or equal to any one of the first outdoor load of the first intermediate heat exchange component and the second outdoor load of the second intermediate heat exchange component, then control the first intermediate heat exchange component or the second intermediate heat exchange component to operate. At this time, control any one of the first valve and the second valve to open; Or, in the full cooling mode or the full heating mode, if the total indoor load of all the running indoor units is less than the first outdoor load of the first intermediate heat exchange component and less than the second outdoor load of the second intermediate heat exchange component, then control the second intermediate heat exchange component to operate. At this time, control the first valve to close and the second valve to open; Or, in the full cooling mode or the full heating mode, if the total indoor load of all the running indoor units is greater than the first outdoor load of the first intermediate heat exchange component and greater than the second outdoor load of the second intermediate heat exchange component, then control the first intermediate heat exchange component and the second intermediate heat exchange component to operate simultaneously. At this time, control the first valve and the second valve to open simultaneously; Or, in the full cooling mode or the full heating mode, if the total indoor load of all the indoor units is less than the first outdoor load of the first intermediate heat exchange component and greater than the second outdoor load of the second intermediate heat exchange component, then control the first intermediate heat exchange component to operate. At this time, control the first valve to open and the second valve to close; Or, in the mixed operating mode, obtain the total indoor cooling load and the total indoor heating load of all the running indoor units. If the total indoor cooling load is greater than the total indoor heating load, then control the first intermediate heat exchange component to be in the cooling state and the second intermediate heat exchange component to be in the heating state; Alternatively, in the hybrid working mode, obtain the total indoor cooling load and the total indoor heating load of all operating indoor units. If the total indoor cooling load is less than the total indoor heating load, control the first intermediate heat exchange component to be in the heating state and the second intermediate heat exchange component to be in the cooling state.

10. The control method of the air-conditioning equipment according to any one of claims 7 to 9, characterized in that, It further includes: Receive a working instruction to control entry into the defrosting mode or the anti-freezing mode, and obtain the components to be defrosted or anti-frozen in the air conditioning device; Control and adjust the working state of the outdoor unit according to the components to be defrosted or the anti-freezing components; Wherein, the components to be defrosted include the outdoor heat exchange component, and the anti-freezing components include the first intermediate heat exchange component and the second intermediate heat exchange component.

11. The control method of the air conditioning equipment according to claim 10, characterized in that, The step of controlling and adjusting the working state of the outdoor unit according to the components to be defrosted or the anti-freezing components specifically includes: In the anti-freezing mode; When the anti-freezing component is the first intermediate heat exchange component, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange component to operate in heating and the second intermediate heat exchange component to operate in cooling; Alternatively, when the anti-freezing component is the second intermediate heat exchange component, control the first valve, the second valve, and the third valve to open and the fourth valve to close, and control the first intermediate heat exchange component to operate in cooling and the second intermediate heat exchange component to operate in heating; Alternatively, when the anti-freezing component is the first intermediate heat exchange component and / or the second intermediate heat exchange component, control the first valve and / or the second valve and the fourth valve to open, control the third valve and the fifth valve to close, and control the first intermediate heat exchange component and / or the second intermediate heat exchange component to operate in heating.

12. The control method of the air conditioning equipment according to claim 10, characterized in that, The step of controlling and adjusting the working state of the outdoor unit according to the components to be defrosted or the anti-freezing components specifically includes: In the defrosting mode; When the component to be defrosted is the outdoor heat exchange component, control the fifth valve to open, and control the first valve, the second valve, the third valve, and the fourth valve to close.

13. The control method of the air conditioning equipment according to claim 10, characterized in that, When the outdoor heat exchange component includes a first outdoor heat exchange device and a second outdoor heat exchange device, the step of controlling and adjusting the working state of the outdoor unit according to the components to be defrosted or the anti-freezing components specifically includes: In the defrosting mode; When the component to be defrosted is the first outdoor heat exchange device, control the first valve, the second valve, the third valve, the fourth valve, and the fifth valve to all close, and control the first interface of the first outdoor three-way valve to communicate with the second interface, and the second interface of the second outdoor three-way valve to communicate with the third interface; Alternatively, when the component to be defrosted is the second outdoor heat exchange device, control the first valve, the second valve, the third valve, the fourth valve, and the fifth valve to all close, and control the first interface of the second outdoor three-way valve to communicate with the second interface, and the second interface of the first outdoor three-way valve to communicate with the third interface; Alternatively, when the component to be defrosted is the first outdoor heat exchange device and / or the second outdoor heat exchange device, control the opening of the first valve and / or the second valve and the fourth valve, and control the closing of the third valve and the fifth valve.

14. A control device for an air conditioning apparatus according to any one of claims 1 to 6, characterized in that, Comprising: an acquisition module, configured to acquire the target operating mode and indoor load condition of each of the indoor units, and acquire the outdoor load condition of the outdoor unit; a first control module, configured to control and adjust the outdoor unit to enter different outdoor operating modes according to the target operating mode of each of the indoor units; a second control module, configured to control and adjust the operating states of the first intermediate heat exchange assembly and the second intermediate heat exchange assembly according to the indoor load condition and the outdoor load condition in different outdoor operating modes.

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