Multi-connected air conditioning system host switching method, device, equipment, medium and product

Abstract

This application provides a method, apparatus, device, medium, and product for switching the main unit of a multi-split air conditioning system. The method includes: obtaining a switching command; determining a switching device and a first main unit connected to the target terminal device based on the identifier of the target terminal device in the switching command; controlling the switching device to disconnect the target terminal device from the second main unit supporting the connection of the target terminal device; and connecting the target terminal device to the first main unit. In this solution, the first and second main units share the terminal device. The switching device allows the terminal device to be switched between multiple main units, and the refrigerant can be moved accordingly, reducing the footprint of the terminal devices and the amount of refrigerant used, thereby reducing the cost of the multi-split air conditioning system.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a method, apparatus, equipment, medium and product for switching the main unit of a multi-split air conditioning system. Background Technology

[0002] Multi-split air conditioning systems are widely used in commercial and large residential buildings. These systems connect multiple indoor units to one or more outdoor units, allowing for flexible adjustment of refrigerant flow according to the needs of different rooms, thus achieving personalized temperature control and energy savings. Redundancy is typically required to ensure the system continues to operate normally in the event of a malfunction.

[0003] Current multi-split air conditioning systems are designed with a primary unit and a backup unit for failover. However, the backup unit is a complete and independent backup of the primary unit, with two sets of equipment at the same terminal: one for the primary unit's evaporator and fan, and another for the backup unit's evaporator and fan. This approach increases the footprint of the terminal equipment and also increases the cost of the multi-split air conditioning system. Therefore, the current challenge is to reduce the cost of multi-split air conditioning systems. Summary of the Invention

[0004] This application provides a method, apparatus, equipment, medium, and product for switching the main unit of a multi-split air conditioning system, in order to reduce the cost of the multi-split air conditioning system.

[0005] In a first aspect, embodiments of this application provide a method for switching the main unit of a multi-split air conditioning system, applied to a multi-split air conditioning system; the system includes: at least two main units, a switching device connected to the at least two main units, and at least one terminal device connected to the switching device; the method includes: obtaining a switching instruction; the switching instruction includes: an identifier of a target terminal device; the target terminal device is a terminal device among at least two terminal devices; based on the identifier of the target terminal device, determining the switching device connected to the target terminal device and a first main unit; the first main unit is a main unit among at least two main units other than a second main unit; the second main unit is a main unit among at least two main units that supports the operation of the target terminal device; a first end of the switching device is connected to the liquid inlet of the target terminal device, a second end of the switching device is connected to the liquid outlet of the first main unit and the liquid outlet of the second main unit; a third end of the switching device is connected to the air outlet of the target terminal device, and a fourth end of the switching device is connected to the air inlet of the first main unit and the air inlet of the second main unit; controlling the switching device to disconnect the target terminal device from the second main unit and connect it to the first main unit.

[0006] The multi-split air conditioning system host switching method of this application includes: obtaining a switching command; determining the switching device and the first host connected to the target terminal device according to the identifier of the target terminal device in the switching command; controlling the switching device to disconnect the target terminal device from the second host supporting the connection of the target terminal device; and connecting the target terminal device to the first host. In this solution, the first host and the second host share the terminal device. The switching device allows the terminal device to be switched between multiple hosts, and the refrigerant can be moved accordingly, reducing the footprint of the terminal device and the amount of refrigerant used, thereby reducing the cost of the multi-split air conditioning system.

[0007] In one possible implementation, controlling the switching device includes: connecting the first and second ends of the switching device to the liquid outlet of the first host, and connecting the third and fourth ends of the switching device to the air inlet of the first host.

[0008] This example solution, through the switching operation logic of the devices, enables flexible switching of the target terminal devices between different host units, which can improve the reliability and stability of the multi-split air conditioning system.

[0009] In one possible implementation, the main unit includes a refrigeration module and a condenser; the condenser is connected to the switching device via the refrigeration module, the condenser is used to condense the refrigerant, and the refrigeration module is used to compress the refrigerant.

[0010] In this example, the condenser is used to condense the refrigerant, and the refrigeration module is used to compress the refrigerant to achieve refrigerant circulation during refrigeration.

[0011] In one possible implementation, the refrigeration module includes: a compressor and a refrigerant pump; the compressor's inlet is connected to the fourth end of the switching device, the compressor's outlet is connected to the condenser's inlet, and the compressor is used to operate in compressor refrigeration mode; the condenser's outlet is connected to the refrigerant pump's inlet, the refrigerant pump's outlet is connected to the second end of the switching device, and the refrigerant pump is used to operate in energy-saving refrigeration mode.

[0012] This example demonstrates a solution that improves the flexibility of multi-split air conditioning systems by simultaneously connecting the compressor and refrigerant pump to the refrigerant cycle and enabling different cooling modes through switching the compressor and refrigerant pump on and off.

[0013] In one possible implementation, the first host and the second host operate in different cooling modes.

[0014] The solution in this example, by connecting a liquid receiver tank, can store and regulate the flow of refrigerant to improve the stability of the refrigerant circulation in a multi-split air conditioning system.

[0015] In this example, by setting the first host and the second host to run in different cooling modes, the terminal devices can run in different cooling modes when connected to different hosts.

[0016] In one possible implementation, the main unit further includes: a liquid storage tank; the outlet of the condenser is connected to the second end of the switching device via the liquid storage tank.

[0017] The solution in this example, by connecting a liquid receiver tank, can store and regulate the flow of refrigerant to improve the stability of the refrigerant circulation in a multi-split air conditioning system.

[0018] In one possible implementation, the switching device includes a first valve and a second valve; the outlet of the first valve is connected to the liquid inlet of the target terminal device, the first inlet of the first valve is connected to the liquid outlet of the second host, and the second inlet of the first valve is connected to the liquid outlet of the first host; the inlet of the second valve is connected to the air outlet of the target terminal device, the first outlet of the second valve is connected to the air inlet of the second host, and the second outlet of the second valve is connected to the air inlet of the first host.

[0019] The solution in this example uses a first valve and a second valve to switch between the first host and the second host, which simplifies the design of the switching equipment and reduces costs while still achieving the required functionality.

[0020] In one possible implementation, controlling the switching device includes: opening the switching device, the outlet of a first valve and the second inlet of the first valve, as well as the inlet of a second valve and the second outlet of the second valve.

[0021] In this example, when the connection between the outlet of the first valve and the second inlet of the first valve is made open, and the connection between the inlet of the second valve and the second outlet of the second valve is made open, the target terminal device can be connected to the first host and the refrigerant circulation between the target terminal device and the first host can be started.

[0022] In one possible implementation, the switching device includes a third valve, a fourth valve, a fifth valve, and a sixth valve; the outlet of the third valve is connected to the liquid inlet of the target terminal device, and the inlet of the third valve is connected to the liquid outlet of the second host; the outlet of the fourth valve is connected to the liquid inlet of the target terminal device, and the inlet of the fourth valve is connected to the liquid outlet of the first host; the inlet of the fifth valve is connected to the air outlet of the target terminal device, and the outlet of the fifth valve is connected to the air inlet of the second host; the inlet of the sixth valve is connected to the air outlet of the target terminal device, and the outlet of the sixth valve is connected to the air inlet of the first host.

[0023] In this example, the solution uses a third valve, a fourth valve, a fifth valve, and a sixth valve to switch the target terminal device between the first host and the second host. The independent operation of each valve can improve the stability of the switching device.

[0024] In one possible implementation, controlling the switching device includes: closing the third and fifth valves of the switching device; and opening the fourth and sixth valves of the switching device.

[0025] In this example, when the third and fifth valves of the switching device are closed and the fourth and sixth valves of the switching device are opened, the target terminal device can be connected to the first host and the refrigerant circulation between the target terminal device and the first host can be started.

[0026] In one possible implementation, the method further includes: acquiring the return air temperature and outdoor ambient temperature corresponding to any one of the at least one terminal devices, and detecting the number of first terminal devices whose difference between the return air temperature and the outdoor ambient temperature is higher than a threshold; if the number of first terminal devices is not less than the number of energy-saving cooling modes activated by the first host, using the first terminal devices as target terminal devices and generating a switching command; and controlling the first host to operate in energy-saving cooling mode.

[0027] The solution in this example can identify which terminal devices can utilize the natural cooling conditions of the external environment by detecting the difference between the return air temperature and the outdoor ambient temperature. When the number of terminal devices that meet the conditions reaches a certain threshold, the system automatically switches to the energy-saving cooling mode of the first host, thereby reducing the system's power consumption and improving the system's lifespan.

[0028] In one possible implementation, the method further includes: controlling the second host to operate in energy-saving cooling mode when the number of first terminal devices is not less than the number of energy-saving cooling modes activated by the second host; wherein the number of energy-saving cooling modes activated by the second host is greater than the number of energy-saving cooling modes activated by the first host; when the number of second terminal devices other than the first terminal devices is not less than the number of compressor cooling modes activated by the first host, the second terminal devices are used as target terminal devices and a switching command is generated; and controlling the first host to operate in compressor cooling mode.

[0029] The solution in this example flexibly adjusts the connection between the terminal device and the first and second host based on the operating conditions of the terminal device, so as to switch the cooling mode of the terminal device. Under the premise of ensuring that the host and the backup host are operating normally, it can improve the energy saving of the system, reduce the power consumption of the system, improve the system life and cooling efficiency, etc.

[0030] Secondly, embodiments of this application provide a main unit switching device for a multi-split air conditioning system, applied to a multi-split air conditioning system; the system includes: at least two main units, a switching device connected to the at least two main units, and at least one terminal device connected to the switching device; the device includes: an acquisition module, used to acquire a switching instruction; the switching instruction includes: an identifier of a target terminal device; the target terminal device is a terminal device among at least two terminal devices; a determination module, used to determine, based on the identifier of the target terminal device, the switching device connected to the target terminal device and a first main unit; the first main unit is a main unit among the at least two main units other than a second main unit; the second main unit is a main unit among the at least two main units that supports the operation of the target terminal device; a first end of the switching device is connected to the liquid inlet of the target terminal device, a second end of the switching device is connected to the liquid outlet of the first main unit and the liquid outlet of the second main unit; a third end of the switching device is connected to the air outlet of the target terminal device, and a fourth end of the switching device is connected to the air inlet of the first main unit and the air inlet of the second main unit; a control module, used to control the switching device to disconnect the target terminal device from the second main unit and connect it to the first main unit.

[0031] Thirdly, embodiments of this application provide an electronic device, including: a memory and a processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory, causing the processor to perform the first aspect and / or various possible implementations of the first aspect as described above.

[0032] Fourthly, embodiments of this application provide a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the first aspect and / or various possible implementations of the first aspect.

[0033] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the first aspect and / or various possible implementations of the first aspect.

[0034] The multi-split air conditioning system host switching method, apparatus, device, medium, and product provided in this application include: obtaining a switching command; determining the switching device and the first host connected to the target terminal device based on the identifier of the target terminal device in the switching command; controlling the switching device to disconnect the target terminal device from the second host supporting the connection of the target terminal device; and connecting the target terminal device to the first host. In this application, the first host and the second host share the terminal device. The switching device allows the terminal device to switch between multiple hosts, and the refrigerant can be moved accordingly, reducing the footprint of the terminal device and the amount of refrigerant used, thereby reducing the cost of the multi-split air conditioning system. Attached Figure Description

[0035] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0036] Figure 1 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application;

[0037] Figure 2 A flowchart illustrating the host switching method for a multi-split air conditioning system provided in this application embodiment;

[0038] Figure 3 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application;

[0041] Figure 6 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application;

[0042] Figure 7 A flowchart illustrating the host switching method for a multi-split air conditioning system provided in this application embodiment;

[0043] Figure 8 A flowchart illustrating the host switching method for a multi-split air conditioning system provided in this application embodiment;

[0044] Figure 9 A schematic diagram of the main unit switching device of the multi-split air conditioning system provided in the embodiments of this application;

[0045] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0048] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning. The terms "comprising" and "having," and any variations thereof, in the specification, claims, and accompanying drawings of this application are intended to be omnipresent but not exclusive. For example, a product or device that comprises a series of components is not necessarily limited to those components that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such products or devices. The term "module" as used in this application refers to any known or subsequently developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and / or software code capable of performing the functions associated with that element.

[0049] Multi-split air conditioning systems have developed rapidly in recent years, becoming one of the key technologies for modern building environmental control. With their high efficiency, energy saving, flexible installation, and intelligent control, these systems are widely used in commercial, residential, and public buildings. With technological advancements, particularly in the application of inverter compressors and environmentally friendly refrigerants, multi-split air conditioning systems have not only improved energy efficiency but also met increasingly stringent environmental standards. These systems connect multiple indoor units to one or more outdoor units, allowing for flexible adjustment of refrigerant flow according to the specific needs of different rooms, thus achieving personalized temperature control and significant energy savings. However, to ensure the system continues to operate normally in the event of a malfunction, redundancy design is usually required.

[0050] In existing multi-split air conditioning systems, a primary and backup unit design is typically used to achieve primary / backup switching. However, this design usually requires the backup unit to act as a complete and independent backup of the primary unit. This means that two independent units need to be configured in the same terminal unit: one driven by the primary unit for the evaporator and fan, and the other driven by the backup unit. While this redundancy design improves system reliability, it also brings significant drawbacks. Firstly, it significantly increases the footprint of the terminal units. The need to reserve space for two independent units impacts the building's interior space utilization. Secondly, this redundancy design significantly increases the overall cost of the multi-split air conditioning system. Besides the increased cost of the equipment itself, the complexity of installing and maintaining two independent units also leads to additional expenses. Therefore, the current challenge is how to reduce the cost of multi-split air conditioning systems.

[0051] The technical content provided in this application aims to solve the aforementioned technical problems in related technologies. In the multi-split air conditioning system main unit switching method, apparatus, device, medium, and product of this application, the method includes: obtaining a switching command; determining the switching device and the first main unit connected to the target terminal device based on the identifier of the target terminal device in the switching command; controlling the switching device to disconnect the target terminal device from the second main unit supporting the connection of the target terminal device; and connecting the target terminal device to the first main unit. In the solution of this application, the first and second main units share the terminal device. The switching device allows the terminal device to switch between multiple main units, and the refrigerant can be moved accordingly, reducing the footprint of the terminal device and the amount of refrigerant used, thereby reducing the cost of the multi-split air conditioning system.

[0052] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0053] Figure 1 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application, as shown below. Figure 1 As shown, the system includes: at least two main units, a switching device connected to the at least two main units, and at least one terminal device connected to the switching device. Based on this multi-split air conditioning system, Figure 2 This is a flowchart illustrating the host switching method for a multi-split air conditioning system provided in an embodiment of this application, as shown below. Figure 2 As shown, the method includes:

[0054] S101. Obtain a handover instruction; the handover instruction includes: the identifier of the target terminal device; the target terminal device is a terminal device among at least one terminal device;

[0055] S102. Based on the identifier of the target terminal device, determine the switching device and the first host connected to the target terminal device; the first host is the host other than the second host among at least two hosts; the second host is the host that supports the operation of the target terminal device among at least two hosts; the first end of the switching device is connected to the liquid inlet of the target terminal device, the second end of the switching device is connected to the liquid outlet of the first host and the liquid outlet of the second host; the third end of the switching device is connected to the air outlet of the target terminal device, and the fourth end of the switching device is connected to the air inlet of the first host and the air inlet of the second host;

[0056] S103. Control the switching device to disconnect the target terminal device from the second host and connect it to the first host.

[0057] In practical applications, the executing entity of this method can be the main unit switching device of a multi-split air conditioning system. There are various ways to implement it, such as through a computer program (e.g., application software); or through a medium storing the relevant computer program (e.g., a USB flash drive, cloud storage); or through a physical device integrating or installing the relevant computer program (e.g., a chip). For example, the main unit switching device can also be integrated into a multi-split air conditioning system.

[0058] In this example, the main unit can be understood as the outdoor unit of an air conditioner, which includes a condenser and a compressor; the terminal device can be understood as the indoor unit of an air conditioner, which includes an evaporator; the main unit and the terminal device form the basic components of a refrigerant circulation system through refrigerant pipes. Exemplarily, the main unit may also include any of the following components: such as a fan for circulating air around the condenser to aid heat dissipation; such as an expansion valve or electronic expansion valve for controlling the speed and amount of refrigerant flowing into the indoor unit's evaporator to regulate the cooling effect; such as sensors and control circuits for regulating the operation of the compressor and fan to achieve the required temperature and efficiency; such as a refrigerant pump for circulating and delivering refrigerant in the refrigeration system. Exemplarily, the terminal device may also include a fan for promoting airflow, allowing indoor air to exchange heat through the evaporator. The switching device is an intermediate component between the main unit and the terminal device. Exemplarily, a one-to-one correspondence between the switching device and the terminal device can be set to improve the accuracy and reliability of switching control. Optionally, there can be multiple correspondences between the switching device and the terminal device, such as one switching device corresponding to at least one terminal device to reduce the number of switching devices and improve modular management of the terminal devices, or multiple switching devices corresponding to one terminal device to improve the reliability of main unit switching. For example, the switching device is a fluid control device, such as a four-way directional valve, an electric valve manifold, a solenoid valve, or an intelligent control system consisting of multiple valves or directional devices that combines sensors and control algorithms.

[0059] The switching command in this example can come from various sources. Its primary purpose is to switch the host currently connected to the target terminal device. For instance, the switching command could originate from a fault detection system. When the host malfunctions or experiences performance degradation (such as excessively high temperature, abnormal pressure, or insufficient flow), the fault detection system generates a switching command to automatically switch to a backup machine, ensuring continuous system operation. Alternatively, it could originate from an automated control system. In highly automated systems, the control system may automatically generate switching commands based on real-time monitoring data and preset logical conditions to optimize system performance and energy efficiency. Finally, it could be triggered manually by the operator. In certain situations, operators can manually trigger switching commands through a control panel or remote control system to address specific operational needs or emergency situations.

[0060] Upon receiving the switching instruction, the switching device connected to the target terminal device and the first host are determined based on the identifier of the target terminal device in the switching instruction. For example, the switching device connected to the target terminal device can be determined based on a pre-determined configuration file or mapping relationship. For example, the first host can be determined based on various strategies, such as determining a higher-priority first host, a first host with higher cooling capacity, a first host with lower energy consumption, or a currently idle and not running first host.

[0061] It should be noted that the multi-split air conditioning system includes a first main unit and a second main unit. The first main unit is the main unit to which the target terminal device is switched based on a switching command, and the second main unit is the main unit to which the target terminal device is currently connected. In this example, the number and product type of the first and second main units are not further limited. For example, there can be one or more first and second main units, and the product type or operating cooling mode of the first main unit can be the same as or different from that of the second main unit. Optionally, the first main unit can be a backup main unit for the second main unit, or the first and second main units can be backup main units for each other.

[0062] In this example, when the terminal device is connected to the second host, the second host, its liquid outlet, the second end of the switching device, the switching device, the first end of the switching device, the liquid inlet of the terminal device, and the terminal device constitute the liquid circuit in the refrigerant circulation. Correspondingly, the terminal device, its gas outlet, the third end of the switching device, the switching device, the fourth end of the switching device, the gas inlet of the second host, and the host constitute the gas circuit in the refrigerant circulation. Once the switching device and the first host connected to the target terminal device are determined, the switching device is controlled to disconnect the target terminal device from the second host and connect it to the first host. When the target terminal device is connected to the first host, the refrigerant in the second host's refrigerant circulation can enter the refrigerant connection pipe between the target terminal device and the first host to continue the refrigerant circulation. Optionally, after the target terminal device switches to the first host, the refrigerant may not need to undergo any migration.

[0063] The multi-split air conditioning system host switching method of this application includes: obtaining a switching command; determining the switching device and the first host connected to the target terminal device according to the identifier of the target terminal device in the switching command; controlling the switching device to disconnect the target terminal device from the second host supporting the connection of the target terminal device; and connecting the target terminal device to the first host. In this solution, the first host and the second host share the terminal device. The switching device allows the terminal device to be switched between multiple hosts, and the refrigerant can be moved accordingly, reducing the footprint of the terminal device and the amount of refrigerant used, thereby reducing the cost of the multi-split air conditioning system.

[0064] As an example, based on any example, step 103, controlling the switching device, includes:

[0065] The connection between the first and second ends of the switching device and the liquid outlet of the first host, and the connection between the third and fourth ends of the switching device and the air inlet of the first host.

[0066] In this example, after connecting the first and second ends of the switching device to the liquid outlet of the first main unit, and connecting the third and fourth ends of the switching device to the air inlet of the first main unit, liquid refrigerant flows from the liquid outlet of the first main unit, through the second end of the switching device, through the first end of the switching device, to the liquid inlet of the target terminal device; and gaseous refrigerant flows from the air outlet of the target terminal device, through the third end of the switching device, through the fourth end of the switching device, to the air inlet of the first main unit. It should be noted that the connection between the second end of the switching device and either the liquid outlet of the first or second main unit is optional; in practical applications, this function can be achieved through a switch or valve. Similarly, the connection between the fourth end of the switching device and either the air inlet of the first or second main unit is optional. On the other hand, if the target terminal device needs to be switched from the first main unit to the second main unit, the control logic described above can be used, which will not be elaborated further here. This example solution, through the operating logic of the switching device, achieves flexible switching of the target terminal device between different main units, which can improve the reliability and stability of the multi-split air conditioning system.

[0067] Figure 3 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application. Figure 3 As shown, based on any example, the host includes: a refrigeration module and a condenser;

[0068] The condenser is connected to the switching equipment via a refrigeration module. The condenser is used to condense the refrigerant, and the refrigeration module is used to compress the refrigerant.

[0069] In this example, the refrigeration module can be a compressor or a refrigerant pump; optionally, the refrigeration module can also be a compressor and a refrigerant pump. When the refrigeration module includes a compressor, the compressor needs to be connected to the gas circuit of the refrigerant cycle; when the refrigeration module includes a refrigerant pump, the refrigerant pump needs to be connected to the liquid circuit of the refrigerant cycle. Optionally, the compressor can be an oil-free compressor to avoid compressor failure due to shared piping, or a compressor with an oil separator. Optionally, the compressor can also be a non-electrically driven compressor, such as a natural gas or waste heat driven compressor. Optionally, the refrigerant pump can achieve the air conditioner's natural cooling mode, i.e., a low-power, energy-saving cooling mode, by compressing the liquid refrigerant. For example, when the refrigeration module includes both a compressor and a refrigerant pump, the compressor is used for the high-power cooling mode, and the refrigerant pump is used for the natural cooling mode; the two cannot be used simultaneously, but the cooling mode of the main unit can be switched by switching the two devices on and off. For example, the condenser can take various forms, such as an air-cooled condenser, an evaporative condenser, or a shell-and-tube condenser. In this example, the condenser is used to condense the refrigerant, and the refrigeration module is used to compress the refrigerant to achieve refrigerant circulation during refrigeration.

[0070] Figure 4 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application. Figure 4 As shown, based on any example, the refrigeration module includes: a compressor and a refrigerant pump;

[0071] The compressor's inlet is connected to the fourth end of the switching device, and the compressor's outlet is connected to the condenser's inlet. The compressor is used to operate in compressor cooling mode. The condenser's outlet is connected to the refrigerant pump's inlet, and the refrigerant pump's outlet is connected to the second end of the switching device. The refrigerant pump is used to operate in energy-saving cooling mode.

[0072] In this example, the condenser, condenser outlet, refrigerant pump inlet, refrigerant pump, refrigerant pump outlet, second end of switching device, switching device, first end of switching device, inlet of terminal device, and terminal device constitute the liquid circuit of the refrigerant cycle. Correspondingly, the terminal device, terminal device outlet, third end of switching device, switching device, fourth end of switching device, compressor inlet, compressor, compressor outlet, condenser inlet, and condenser constitute the gas circuit of the refrigerant cycle. This example solution, by simultaneously connecting the compressor and refrigerant pump to the refrigerant cycle, allows for different cooling modes to be achieved by switching the compressor and refrigerant pump on and off, thereby improving the flexibility of the multi-split air conditioning system.

[0073] As an example, in either case, the first host and the second host operate in different cooling modes.

[0074] For example, the first and second main units can be configured with a compressor and a refrigerant pump respectively, or with a refrigerant pump and a compressor, to achieve different cooling modes. Optionally, both the first and second main units can be configured with a compressor and a refrigerant pump, and different cooling modes can be achieved by switching the compressor and refrigerant pump on and off. In this example, by setting the first and second main units to operate in different cooling modes, the terminal devices can operate in different cooling modes when connected to different main units.

[0075] As an example, based on any example, the host also includes: a liquid storage tank;

[0076] The liquid outlet of the condenser is connected to the second end of the switching device via a liquid storage tank.

[0077] In this example, the condenser's liquid outlet is connected to the second end of the switching device under the main unit via a liquid receiver tank. This can be understood as the liquid receiver tank being connected to the refrigerant circulation liquid path. For example, when the main unit includes a refrigerant pump, the connection relationship of this liquid path can be: condenser, liquid receiver tank, refrigerant pump, switching device, or: condenser, refrigerant pump, liquid receiver tank, switching device. Optionally, when the main unit does not include a refrigerant pump, the connection relationship of this liquid path can be: condenser, liquid receiver tank, switching device. In this example, by connecting the liquid receiver tank, the refrigerant flow rate can be stored and regulated to improve the stability of the refrigerant circulation in the multi-split air conditioning system.

[0078] Figure 5 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application. Figure 5 As shown, based on any example, the switching device includes a first valve and a second valve;

[0079] The outlet of the first valve is connected to the inlet of the target terminal equipment, the first inlet of the first valve is connected to the outlet of the second host, and the second inlet of the first valve is connected to the outlet of the first host.

[0080] The inlet of the second valve is connected to the outlet of the target terminal device, the first outlet of the second valve is connected to the inlet of the second host, and the second outlet of the second valve is connected to the inlet of the first host.

[0081] In this example, the first and second valves can be three-way valves, solenoid valve combinations, or distributors. When the target terminal device is connected to the second host, the connection between the outlet and the first inlet of the first valve, and the connection between the inlet and the first outlet of the second valve, are both established. When the target terminal device is connected to the first host, the connection between the outlet and the second inlet of the first valve, and the connection between the inlet and the second outlet of the second valve, are both established. It should be noted that only one of the first and second inlets of the first valve, and only one of the first and second outlets of the second valve, is selected. This example solution achieves switching between the first and second host through the first and second valves, simplifying the design of the switching equipment and reducing costs while still fulfilling the functionality.

[0082] As an example, based on any example, step 103, controlling the switching device, includes:

[0083] The switching equipment is activated by opening the outlet and second inlet of the first valve, as well as the inlet and second outlet of the second valve.

[0084] The method described in this example is applicable to multi-split air conditioning systems where switching devices include a first valve and a second valve. Exemplarily, the first and second valves can be three-way valves, solenoid valve combinations, or distributors. In this example, when the connection between the outlet and the second inlet of the first valve, and the connection between the inlet and the second outlet of the second valve, are established, the target terminal device can be connected to the first main unit, and refrigerant circulation between the target terminal device and the first main unit can be initiated.

[0085] Figure 6 This is a schematic diagram of the structure of a multi-split air conditioning system provided in an embodiment of this application. Figure 6 As shown, based on any example, the switching device includes a third valve, a fourth valve, a fifth valve, and a sixth valve;

[0086] The outlet of the third valve is connected to the inlet of the target terminal equipment, and the inlet of the third valve is connected to the outlet of the second main unit; the outlet of the fourth valve is connected to the inlet of the target terminal equipment, and the inlet of the fourth valve is connected to the outlet of the first main unit.

[0087] The inlet of the fifth valve is connected to the outlet of the target terminal equipment, and the outlet of the fifth valve is connected to the inlet of the second main unit; the inlet of the sixth valve is connected to the outlet of the target terminal equipment, and the outlet of the sixth valve is connected to the inlet of the first main unit.

[0088] In this example, the third, fourth, fifth, and sixth valves can be general-purpose solenoid valves or other manually, pneumatically, or electrically controlled valves such as ball valves, butterfly valves, and gate valves. For example, when the target terminal device is connected to the second host, the connection between the outlet and inlet of the third valve is open, the connection between the outlet and inlet of the fourth valve is closed, the connection between the outlet and inlet of the fifth valve is open, and the connection between the outlet and inlet of the sixth valve is closed. When the target terminal device is connected to the first host, the connection between the outlet and inlet of the third valve is closed, the connection between the outlet and inlet of the fourth valve is open, the connection between the outlet and inlet of the fifth valve is closed, and the connection between the outlet and inlet of the sixth valve is open. This example solution uses the third, fourth, fifth, and sixth valves to switch the target terminal device between the first and second host devices. The independence of each valve improves the stability of the switching device.

[0089] As an example, based on any example, step 103, controlling the switching device, includes:

[0090] Close the third and fifth valves of the switching device; and open the fourth and sixth valves of the switching device.

[0091] The method described in this example is applicable to multi-split air conditioning systems where the switching equipment includes a third, fourth, fifth, and sixth valve. The third, fourth, fifth, and sixth valves in this example can be general-purpose solenoid valves, or other manually, pneumatically, or electrically controlled valves such as ball valves, butterfly valves, and gate valves. In this example, when the third and fifth valves of the switching equipment are closed, and the fourth and sixth valves are opened, the target terminal device can be connected to the first main unit, and refrigerant circulation between the target terminal device and the first main unit can be initiated.

[0092] Figure 7 This is a flowchart illustrating the main unit switching method for a multi-split air conditioning system provided in an embodiment of this application. Figure 7 As shown, based on any example, the main unit switching method for a multi-split air conditioning system further includes:

[0093] S201. Obtain the return air temperature and outdoor ambient temperature corresponding to any terminal device among at least one terminal device, and detect the number of first terminal devices whose difference between the return air temperature and the outdoor ambient temperature is higher than a threshold.

[0094] S202, when the number of first terminal devices is not less than the number of energy-saving cooling modes activated by the first host, the first terminal devices are used as target terminal devices, and a switching command is generated; and the first host is controlled to run the energy-saving cooling mode.

[0095] In this example, return air refers to the air returning from the space cooled by the terminal equipment to the air conditioning unit, and return air temperature refers to the air temperature inside the return air duct of the air conditioning system. In practical applications, this temperature can be measured using a temperature sensor inside the duct. Alternatively, in practical applications, the outdoor ambient temperature can be measured using a temperature sensor installed outside the building or obtained from a relevant meteorological website and used for temperature control of the air conditioning system.

[0096] After obtaining the return air temperature and outdoor ambient temperature for each terminal device, the difference between the return air temperature and the outdoor ambient temperature is checked to see if it exceeds a threshold. If it exceeds the threshold, it is designated as the first terminal device, indicating that the first terminal device can execute the refrigerant pump cooling mode, i.e., the energy-saving cooling mode. In practical applications, this threshold may depend on the system design and configuration. For example, different air conditioning systems may be designed with different thresholds, depending on the system efficiency, building heat load, and other design parameters; or on external environmental conditions, such as the applicable threshold may vary under different climatic conditions; in colder climates, the threshold may be set lower to utilize natural cooling more frequently; or it may be based on user needs or energy-saving goals, etc.

[0097] Furthermore, it is necessary to compare the number of first-terminal devices with the number of energy-saving cooling modes activated by the first host. If the former is less than the latter, the first-terminal devices still operate in the compressor mode of the second host; if the former is not less than the latter, the first-terminal devices operate in the energy-saving cooling mode of the first host. Specifically, by using the first-terminal devices as target terminal devices, a switching command is generated; and the first host is controlled to operate in energy-saving cooling mode to achieve the above effect. In practical applications, the number of energy-saving cooling modes activated by the first host depends on the minimum flow rate of the refrigerant pump when the first host is operating.

[0098] The solution in this example can identify which terminal devices can utilize the natural cooling conditions of the external environment by detecting the difference between the return air temperature and the outdoor ambient temperature. When the number of terminal devices that meet the conditions reaches a certain threshold, the system automatically switches to the energy-saving cooling mode of the first host, thereby reducing the system's power consumption and improving the system's lifespan.

[0099] Figure 8 This is a flowchart illustrating the main unit switching method for a multi-split air conditioning system provided in an embodiment of this application. Figure 8 As shown, based on any example, the main unit switching method for a multi-split air conditioning system further includes:

[0100] S301. When the number of first terminal devices is not less than the number of energy-saving cooling modes activated by the second host, control the second host to operate in energy-saving cooling mode; wherein, the number of energy-saving cooling modes activated by the second host is greater than the number of energy-saving cooling modes activated by the first host.

[0101] S302. When the number of second terminal devices other than the first terminal device is not less than the number of compressor cooling modes activated by the first host, the second terminal devices are used as target terminal devices, and a switching command is generated; and the first host is controlled to run the compressor cooling mode.

[0102] It should be noted that in this example, at least one terminal device is connected to the second host, and the second host operates in compressor cooling mode. For example, this embodiment can be executed after S201 or after S202.

[0103] In this example, when the number of first-end devices is large, the cooling mode of the second host can be directly switched from compressor cooling mode to energy-saving cooling mode. Furthermore, when the number of second-end devices (excluding the first-end devices) is less than the number of first-host devices operating in compressor cooling mode, the second-end devices follow the first-end devices into energy-saving cooling mode; when the number of second-end devices is not less than the number of first-host devices operating in compressor cooling mode, the second-end devices are connected to the first host, and the compressor of the first host is controlled to operate. Specifically, by using the second-end devices as target terminal devices, generating switching commands, and controlling the first host to operate in compressor cooling mode, the above effects can be achieved.

[0104] The solution in this example flexibly adjusts the connection between the terminal device and the first and second host based on the operating conditions of the terminal device, so as to switch the cooling mode of the terminal device. Under the premise of ensuring that the host and the backup host are operating normally, it can improve the energy saving of the system, reduce the power consumption of the system, improve the system life and cooling efficiency, etc.

[0105] The multi-split air conditioning system host switching method of this application includes: obtaining a switching command; determining the switching device and the first host connected to the target terminal device according to the identifier of the target terminal device in the switching command; controlling the switching device to disconnect the target terminal device from the second host supporting the connection of the target terminal device; and connecting the target terminal device to the first host. In this solution, the first host and the second host share the terminal device. The switching device allows the terminal device to be switched between multiple hosts, and the refrigerant can be moved accordingly, reducing the footprint of the terminal device and the amount of refrigerant used, thereby reducing the cost of the multi-split air conditioning system.

[0106] Figure 9 This is a schematic diagram of the main unit switching device for a multi-split air conditioning system provided in an embodiment of this application. The device is applied to a multi-split air conditioning system; the system includes: at least two main units, a switching device connected to the at least two main units, and at least one terminal device connected to the switching device; such as... Figure 9 As shown, the main unit switching device of the multi-split air conditioning system includes:

[0107] The acquisition module 91 is used to acquire a switching instruction; the switching instruction includes: the identifier of the target terminal device; the target terminal device is a terminal device among at least one terminal device;

[0108] The determining module 92 is used to determine the switching device and the first host connected to the target terminal device based on the identifier of the target terminal device; the first host is a host other than the second host among at least two hosts; the second host is a host that supports the operation of the target terminal device among at least two hosts; the first end of the switching device is connected to the liquid inlet of the target terminal device, the second end of the switching device is connected to the liquid outlet of the first host and the liquid outlet of the second host; the third end of the switching device is connected to the air outlet of the target terminal device, and the fourth end of the switching device is connected to the air inlet of the first host and the air inlet of the second host;

[0109] The control module 93 is used to control the switching device so that the target terminal device is disconnected from the second host and connected to the first host.

[0110] In one example, the control module 93 is specifically used to: connect the first and second ends of the switching device to the liquid outlet of the first host, and connect the third and fourth ends of the switching device to the air inlet of the first host.

[0111] In one example, the host includes a refrigeration module and a condenser; the condenser is connected to the switching device via the refrigeration module, the condenser is used to condense the refrigerant, and the refrigeration module is used to compress the refrigerant.

[0112] In one example, the refrigeration module includes a compressor and a refrigerant pump; the compressor's inlet is connected to the fourth end of the switching device, the compressor's outlet is connected to the condenser's inlet, and the compressor is used to operate in compressor refrigeration mode; the condenser's outlet is connected to the refrigerant pump's inlet, the refrigerant pump's outlet is connected to the second end of the switching device, and the refrigerant pump is used to operate in energy-saving refrigeration mode.

[0113] In one example, the first host and the second host are running in different cooling modes.

[0114] In one example, the host also includes: a liquid storage tank; the outlet of the condenser is connected to the second end of the switching device via the liquid storage tank.

[0115] In one example, the switching device includes a first valve and a second valve; the outlet of the first valve is connected to the liquid inlet of the target terminal device, the first inlet of the first valve is connected to the liquid outlet of the second host, and the second inlet of the first valve is connected to the liquid outlet of the first host; the inlet of the second valve is connected to the air outlet of the target terminal device, the first outlet of the second valve is connected to the air inlet of the second host, and the second outlet of the second valve is connected to the air inlet of the first host.

[0116] In one example, control module 93 is specifically used to: open the outlet and second inlet of the first valve of the switching device, as well as the inlet and second outlet of the second valve.

[0117] In one example, the switching device includes a third valve, a fourth valve, a fifth valve, and a sixth valve; the outlet of the third valve is connected to the liquid inlet of the target terminal device, and the inlet of the third valve is connected to the liquid outlet of the second host; the outlet of the fourth valve is connected to the liquid inlet of the target terminal device, and the inlet of the fourth valve is connected to the liquid outlet of the first host; the inlet of the fifth valve is connected to the air outlet of the target terminal device, and the outlet of the fifth valve is connected to the air inlet of the second host; the inlet of the sixth valve is connected to the air outlet of the target terminal device, and the outlet of the sixth valve is connected to the air inlet of the first host.

[0118] In one example, control module 93 is specifically used to: close the third and fifth valves of the switching device; and open the fourth and sixth valves of the switching device.

[0119] In one example, the acquisition module 91 is further configured to: acquire the return air temperature and outdoor ambient temperature corresponding to any one of the at least one terminal devices, and detect the number of first terminal devices whose difference between the return air temperature and the outdoor ambient temperature is higher than a threshold; if the number of first terminal devices is not less than the number of energy-saving cooling modes activated by the first host, use the first terminal devices as target terminal devices and generate a switching instruction; and control the first host to run the energy-saving cooling mode.

[0120] In one example, the acquisition module 91 is further configured to: control the second host to operate in energy-saving cooling mode when the number of first terminal devices is not less than the number of energy-saving cooling modes activated by the second host; wherein the number of energy-saving cooling modes activated by the second host is greater than the number of energy-saving cooling modes activated by the first host; when the number of second terminal devices other than the first terminal devices is not less than the number of compressor cooling modes activated by the first host, use the second terminal devices as target terminal devices and generate a switching instruction; and control the first host to operate in compressor cooling mode.

[0121] The host switching device for the multi-split air conditioning system provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effect are similar, and will not be described in detail here.

[0122] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device includes:

[0123] The electronic device includes a processor 291 and a memory 292; it may also include a communication interface 293 and a bus 294. The processor 291, memory 292, and communication interface 293 can communicate with each other via the bus 294. The communication interface 293 can be used for information transmission. The processor 291 can invoke logical instructions stored in the memory 292 to execute the methods described in the example above.

[0124] Furthermore, the logic instructions in the aforementioned memory 292 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0125] The memory 292, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this application. The processor 291 executes functional applications and data processing by running the software programs, instructions, and modules stored in the memory 292, that is, it implements the methods in the above method examples.

[0126] The memory 292 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 292 may include high-speed random access memory and may also include non-volatile memory.

[0127] This application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method in any of the embodiments.

[0128] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the method in any of the embodiments.

[0129] Finally, it should be noted that other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for switching the main unit of a multi-split air conditioning system, characterized in that, Applied to multi-split air conditioning systems; The system includes: at least two hosts, a switching device connected to the at least two hosts, and at least one end device connected to the switching device; the method includes: Obtain a switching instruction; the switching instruction includes: an identifier of the target terminal device; the target terminal device is one of the at least one terminal devices; Based on the identifier of the target terminal device, the switching device and the first host connected to the target terminal device are determined; the first host is the host other than the second host among the at least two hosts; the second host is the host that supports the operation of the target terminal device among the at least two hosts; the first end of the switching device is connected to the liquid inlet of the target terminal device, the second end of the switching device is connected to the liquid outlet of the first host and the liquid outlet of the second host; the third end of the switching device is connected to the air outlet of the target terminal device, and the fourth end of the switching device is connected to the air inlet of the first host and the air inlet of the second host; Control the switching device to disconnect the target terminal device from the second host and connect it to the first host.

2. The method according to claim 1, characterized in that, The control of the switching device includes: The connection between the first and second ends of the switching device and the liquid outlet of the first host is established, as well as the connection between the third and fourth ends of the switching device and the air inlet of the first host is established.

3. The method according to claim 1, characterized in that, The host unit includes: a refrigeration module and a condenser; The condenser is connected to the switching device via the refrigeration module. The condenser is used to condense the refrigerant, and the refrigeration module is used to compress the refrigerant.

4. The method according to claim 3, characterized in that, The refrigeration module includes: a compressor and a refrigerant pump; The compressor's inlet is connected to the fourth end of the switching device, and the compressor's outlet is connected to the condenser's inlet. The compressor is used to operate in compressor cooling mode. The condenser's outlet is connected to the refrigerant pump's inlet, and the refrigerant pump's outlet is connected to the second end of the switching device. The refrigerant pump is used to operate in energy-saving cooling mode.

5. The method according to any one of claims 1-4, characterized in that, The first host and the second host operate in different cooling modes.

6. The method according to claim 3, characterized in that, The host also includes: a liquid storage tank; The liquid outlet of the condenser is connected to the second end of the switching device via the liquid storage tank.

7. The method according to claim 1, characterized in that, The switching device includes a first valve and a second valve; The outlet of the first valve is connected to the inlet of the target terminal device, the first inlet of the first valve is connected to the outlet of the second host, and the second inlet of the first valve is connected to the outlet of the first host. The inlet of the second valve is connected to the outlet of the target terminal device, the first outlet of the second valve is connected to the inlet of the second host, and the second outlet of the second valve is connected to the inlet of the first host.

8. The method according to claim 7, characterized in that, The control of the switching device includes: When the switching device is activated, the outlet of the first valve and the second inlet of the first valve, as well as the inlet of the second valve and the second outlet of the second valve are opened.

9. The method according to claim 1, characterized in that, The switching device includes a third valve, a fourth valve, a fifth valve, and a sixth valve; The outlet of the third valve is connected to the inlet of the target terminal device, and the inlet of the third valve is connected to the outlet of the second host; the outlet of the fourth valve is connected to the inlet of the target terminal device, and the inlet of the fourth valve is connected to the outlet of the first host. The inlet of the fifth valve is connected to the outlet of the target terminal device, and the outlet of the fifth valve is connected to the inlet of the second host; the inlet of the sixth valve is connected to the outlet of the target terminal device, and the outlet of the sixth valve is connected to the inlet of the first host.

10. The method according to claim 9, characterized in that, The control of the switching device includes: Close the third and fifth valves of the switching device; and open the fourth and sixth valves of the switching device.

11. The method according to claim 1, characterized in that, The method further includes: Obtain the return air temperature and outdoor ambient temperature corresponding to any one of the at least one terminal devices, and detect the number of first terminal devices whose difference between the return air temperature and the outdoor ambient temperature is higher than a threshold. When the number of the first terminal devices is not less than the number of energy-saving cooling modes activated by the first host, the first terminal devices are used as the target terminal devices, and the switching instruction is generated; and the first host is controlled to run the energy-saving cooling mode.

12. The method according to claim 11, characterized in that, The method further includes: When the number of the first terminal devices is not less than the number of energy-saving cooling modes activated by the second host, the second host is controlled to run the energy-saving cooling mode; wherein, the number of energy-saving cooling modes activated by the second host is greater than the number of energy-saving cooling modes activated by the first host. When the number of second terminal devices other than the first terminal device is not less than the number of compressor cooling modes activated by the first host, the second terminal devices are used as the target terminal devices, and the switching command is generated; and the first host is controlled to run the compressor cooling mode.

13. A main unit switching device for a multi-split air conditioning system, characterized in that, Applied to multi-split air conditioning systems; The system includes: at least two hosts, a switching device connected to the at least two hosts, and at least one end device connected to the switching device; the apparatus includes: An acquisition module is used to acquire a switching instruction; the switching instruction includes: an identifier of a target terminal device; the target terminal device is one of the at least one terminal devices. A determining module is configured to determine, based on the identifier of the target terminal device, the switching device connected to the target terminal device and the first host; the first host is a host other than the second host among the at least two hosts; the second host is a host among the at least two hosts that supports the operation of the target terminal device; a first end of the switching device is connected to the liquid inlet of the target terminal device, a second end of the switching device is connected to the liquid outlet of the first host and the liquid outlet of the second host; a third end of the switching device is connected to the air outlet of the target terminal device, and a fourth end of the switching device is connected to the air inlet of the first host and the air inlet of the second host; A control module is used to control the switching device to disconnect the target terminal device from the second host and connect it to the first host.

14. An electronic device, characterized in that, include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the method as described in any one of claims 1 to 12.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1 to 12.

16. A computer program product, characterized in that, It includes a computer program that, when executed by a processor, implements the method as described in any one of claims 1 to 12.

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