Cooling mode control method, controller, multi-split air conditioner and storage medium

Abstract

This invention discloses a cooling mode control method, controller, multi-split air conditioner, and storage medium, relating to the field of aging analysis technology. The method includes: when the compressor's exhaust temperature is higher than a preset temperature and a high-power indoor unit is present, closing the first shut-off valve corresponding to the indoor unit adjacent to the high-power indoor unit; opening the auxiliary solenoid valve between the high-power indoor unit and the adjacent indoor unit, allowing the refrigerant to pass through the electronic expansion valves of the high-power indoor unit and the adjacent indoor unit, then converge and enter the high-power indoor unit. This method, by setting an auxiliary solenoid valve between two adjacent indoor units, solves the problem of inapplicable electronic expansion valve specifications when the indoor unit specifications of a multi-split air conditioner differ significantly; one specification of electronic expansion valve can be adapted to different specifications of indoor units, exhibiting good versatility.

Description

Technical Field

[0001] This invention relates to the field of dehumidification, and in particular to a cooling mode control method, a multi-split air conditioner, a controller, and a storage medium. Background Technology

[0002] Existing multi-split air conditioning systems allow one outdoor unit to be paired with multiple indoor units. Each indoor unit has its own set of connecting pipes and electronic expansion valve, and the indoor units can be freely matched. However, since the specifications of the indoor units are selected based on the user's actual needs, there is a degree of randomness. The electronic expansion valves for each indoor unit are typically designed based on the installation of four indoor units, meaning the selected electronic expansion valve is suitable for indoor units with a cooling capacity of 2.5 kW. When the installed indoor units have a cooling capacity of 5 kW or higher, the original electronic expansion valve may be too small, leading to insufficient refrigerant flow under high-load cooling conditions. This results in excessively high compressor discharge temperature, affecting cooling capacity output and compressor lifespan. A common practice is to use expansion valves of different specifications for one outdoor unit. Larger-specification expansion valves are designated for indoor units with higher cooling capacities. Conversely, if a large-specification expansion valve is installed in a small-capacity indoor unit, the refrigerant flow will be excessive, failing to accommodate various installation scenarios. Summary of the Invention

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a cooling mode control method, controller, multi-split air conditioner, and storage medium, which can effectively control the refrigerant flow using the electronic expansion valve, regardless of the indoor unit model, under the default factory-designed electronic expansion valve specifications.

[0004] On the one hand, the cooling mode control method according to the embodiment of the present invention is applied to a multi-split air conditioner, the multi-split air conditioner including: an outdoor unit and a plurality of indoor units, each of the indoor units being connected to the outdoor unit through a liquid pipe, each of the liquid pipes being provided with a first shut-off valve and an electronic expansion valve, and an auxiliary solenoid valve being connected between the electronic expansion valves of every two adjacent indoor units;

[0005] The cooling mode control method includes:

[0006] When the compressor's discharge temperature is higher than the preset temperature and a high-power indoor unit is present, the first shut-off valve corresponding to the indoor unit adjacent to the high-power indoor unit is closed; the high-power indoor unit represents the indoor unit whose cooling capacity is greater than the preset cooling capacity.

[0007] The auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit is opened, so that the refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then enters the high-power indoor unit after being combined at one point.

[0008] According to some embodiments of the present invention, the step of opening the auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit, so that the refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then merges together before being input into the high-power indoor unit, includes:

[0009] Open the auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit;

[0010] The electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit are opened at the same time.

[0011] The refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then merges at one point before being input into the high-power indoor unit.

[0012] According to some embodiments of the present invention, after the step of opening the auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit, so that the refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then merges together before being input into the high-power indoor unit, the method further includes:

[0013] When the decrease in the operating frequency of the compressor exceeds a first preset range, or when the decrease in the outdoor ambient temperature exceeds a second preset range, the auxiliary solenoid valve is closed.

[0014] When the exhaust temperature of the compressor is greater than the preset temperature, the auxiliary solenoid valve is opened again.

[0015] According to some embodiments of the present invention, each of the indoor units is connected to the heat exchanger of the outdoor unit via a gas pipe, and each gas pipe is provided with a second shut-off valve.

[0016] According to some embodiments of the present invention, each of the electronic expansion valves has the same specifications.

[0017] According to some embodiments of the present invention, the high-power indoor unit represents an indoor unit with a cooling capacity greater than 5 kilowatts.

[0018] According to some embodiments of the present invention, the first preset amplitude is 10 Hz and the second preset amplitude is 5 degrees Celsius.

[0019] On the other hand, the controller according to an embodiment of the present invention includes at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the cooling mode control method described in the above-described embodiments.

[0020] On the other hand, a multi-split air conditioner according to an embodiment of the present invention includes the controller described in the above-mentioned embodiments.

[0021] On the other hand, according to an embodiment of the present invention, a computer-readable storage medium stores computer-executable instructions for causing a computer to perform the above-described cooling mode control method.

[0022] The cooling mode control method, controller, multi-split air conditioner, and storage medium according to embodiments of the present invention have at least the following beneficial effects: by setting an auxiliary solenoid valve between two adjacent indoor units, the problem of inapplicability of the corresponding electronic expansion valve specification when the indoor unit specifications of the multi-split air conditioner differ greatly is solved; an electronic expansion valve of one specification can be adapted to indoor units of different specifications, and has good versatility.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of a multi-split air conditioner according to an embodiment of the present invention;

[0026] Figure 2 This is a flowchart illustrating the steps of the cooling mode control method according to an embodiment of the present invention;

[0027] Figure 3 for Figure 2 A detailed flowchart of step S200;

[0028] Figure 4 This is a schematic diagram illustrating the specific process of the cooling mode control method according to an embodiment of the present invention. Detailed Implementation

[0029] The embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. The step numbers in the following embodiments are set only for ease of explanation, and there is no limitation on the order between the steps. The execution order of each step in the embodiments can be adaptively adjusted according to the understanding of those skilled in the art.

[0030] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0031] The terms "first," "second," "third," and "fourth," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0032] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] Existing multi-split air conditioning systems allow one outdoor unit to be paired with multiple indoor units. Each indoor unit has its own set of connecting pipes and electronic expansion valve, and the indoor units can be freely matched. However, since the specifications of the indoor units are selected based on the user's actual needs, there is a degree of randomness. The electronic expansion valves for each indoor unit are typically designed based on the installation of four indoor units, meaning the selected electronic expansion valve is suitable for indoor units with a cooling capacity of 2.5 kW. When the installed indoor units have a cooling capacity of 5 kW or higher, the original electronic expansion valve may be too small, leading to insufficient refrigerant flow under high-load cooling conditions. This results in excessively high compressor discharge temperature, affecting cooling capacity output and compressor lifespan. A common practice is to use expansion valves of different specifications for one outdoor unit. Larger-specification expansion valves are designated for indoor units with higher cooling capacities. Conversely, if a large-specification expansion valve is installed in a small-capacity indoor unit, the refrigerant flow will be excessive, failing to accommodate various installation scenarios.

[0034] To address this issue, this application discloses a cooling mode control method, apparatus, device, and medium. By installing an auxiliary solenoid valve between two adjacent indoor units, it solves the problem of inapplicable electronic expansion valve specifications when the indoor unit specifications of a multi-split air conditioner differ significantly. A single specification of electronic expansion valve can be adapted to indoor units of different specifications, demonstrating excellent versatility.

[0035] The following describes in detail, with reference to the accompanying drawings, the cooling mode control method, apparatus, equipment, and medium of the present invention.

[0036] On the one hand, embodiments of the present invention propose a cooling mode control method, applicable to multi-split air conditioners, such as... Figure 1 As shown, a multi-split air conditioner includes an outdoor unit 100 and several indoor units 200. Each indoor unit 200 is connected to the compressor of the outdoor unit 100 via a liquid pipe 210. Each liquid pipe 210 is equipped with a first shut-off valve 220 and an electronic expansion valve 230. An auxiliary solenoid valve 240 is connected between the electronic expansion valves 230 of every two adjacent indoor units 200. Figure 2 As shown, the cooling mode control method includes the following steps:

[0037] Step S100: When the compressor's discharge temperature is higher than the preset temperature and a high-power indoor unit is present, close the first shut-off valve 220 corresponding to the indoor unit 200 adjacent to the high-power indoor unit; the high-power indoor unit represents the indoor unit 200 whose cooling capacity is greater than the preset cooling capacity.

[0038] Step S200: Open the auxiliary solenoid valve 240 between the high-power indoor unit and the indoor unit 200 adjacent to the high-power indoor unit, so that the refrigerant of the compressor passes through the electronic expansion valve 230 of the high-power indoor unit and the electronic expansion valve 230 of the indoor unit 200 adjacent to the high-power indoor unit, and then enters the high-power indoor unit.

[0039] It should be noted that for multi-split air conditioners, one outdoor unit 100 can be paired with multiple indoor units 200, and each indoor unit 200 can be freely matched. Based on the outdoor cooling capacity, the total cooling capacity of the freely matched indoor units 200 should match that of the outdoor unit 100, generally within the range of 75% to 125%. For example, a 10kW outdoor unit can be paired with a maximum of four indoor units 200. The actual installation options are as follows:

[0040] It is equipped with 4 indoor units of 200: each unit has a cooling capacity of 2.5KW, and the total cooling capacity is 10KW;

[0041] With 3 indoor units of 200: 1 5KW + 2 2.5KW, the total cooling capacity is 10KW; or 3 3.5kw indoor units, the total cooling capacity is 10.5KW.

[0042] It can be equipped with two indoor units: one 7KW and one 2.5KW, for a total cooling capacity of 9.5KW; or two 5KW units, for a total cooling capacity of 10KW.

[0043] Because the indoor unit 200 is randomly selected based on the user's actual situation, and the electronic expansion valve manufacturer typically designs the model for installing four indoor units 200, i.e., using an electronic expansion valve 230 with a cooling capacity of 2.5kW. When the installed indoor unit has a cooling capacity of 5kW or higher, the original electronic expansion valve is too small, leading to insufficient refrigerant flow under high-load cooling conditions, resulting in excessively high compressor discharge temperature, affecting cooling capacity output and compressor lifespan. Common practice is to use different specifications of electronic expansion valves 230 for one outdoor unit 200, with the larger specification electronic expansion valve 230 specifically designed for large-capacity indoor units 200. However, if a large specification electronic expansion valve 230 is installed in a small-capacity indoor unit 200, the refrigerant flow will be excessive, failing to accommodate various actual installation situations. Therefore, this application allows for effective refrigerant flow control using the electronic expansion valve 230, regardless of the indoor unit model, with the default factory-designed specification, providing excellent versatility.

[0044] like Figure 1 As shown, the technical solution adopted in this invention is as follows:

[0045] Taking a 10kW outdoor unit system with four indoor units as an example, if four 2.5kW indoor units 200 are installed, when the main board of indoor unit 200 detects that there is no indoor unit 200 with a cooling capacity exceeding 5kW, it operates under normal control. In cooling mode, when outdoor unit 100 detects through the main board of indoor unit 200 that there is an indoor unit 200 with a cooling capacity exceeding 5kW (the number of indoor units 200 is less than four), and the exhaust temperature is detected to be too high, the program commands the auxiliary solenoid valve 240 between adjacent electronic expansion valves 230 to open, so that the refrigerant gathers in the liquid line 210 of the 5kW indoor unit 200. This allows the refrigerant, after being throttled by the two electronic expansion valves 230, to converge and flow to the 5kW indoor unit 200, ensuring that there is enough refrigerant entering the 5kW indoor unit 200 and avoiding limited cooling capacity output and excessively high compressor exhaust temperature. In this application, indoor unit 200 with a cooling capacity exceeding 5kW is defined as a high-power indoor unit. It should be noted that, depending on the actual situation, indoor unit 200 with other cooling capacities can also be defined as a high-power indoor unit, and is not limited to this.

[0046] Assuming indoor unit 2 is not installed and indoor unit 1 is 5kW, then the auxiliary solenoid valve 240 between electronic expansion valve 1 and electronic expansion valve 2 needs to be opened so that the refrigerant, after passing through electronic expansion valve 2, auxiliary solenoid valve 240 and electronic expansion valve 1, collects on the liquid line 210 of indoor unit 1, ensuring that enough refrigerant enters indoor unit 1, and avoiding limited cooling capacity output of indoor unit 1 and excessively high compressor discharge temperature.

[0047] It should be noted that this solution also applies to other configurations of multi-split air conditioners, and is not limited to this one.

[0048] Furthermore, such as Figure 3 As shown, in some embodiments of this application, step S200 specifically includes the following steps:

[0049] Step S210: Open the auxiliary solenoid valve 240 between the high-power indoor unit and the indoor unit 200 adjacent to the high-power indoor unit;

[0050] Step S220: Open the electronic expansion valve 230 of the high-power indoor unit and the electronic expansion valve 230 of the indoor unit adjacent to the high-power indoor unit by the same number of times;

[0051] Step S230: The refrigerant from the compressor passes through the electronic expansion valve 230 of the high-power indoor unit and the electronic expansion valve 230 of the indoor unit 200 adjacent to the high-power indoor unit, and then merges into the high-power indoor unit.

[0052] Specifically, in this example, assuming indoor unit 1 is a high-power indoor unit and indoor unit 2 is not installed, the auxiliary solenoid valve 240 between indoor unit 1 and indoor unit 2 is opened. All electronic expansion valves are of the same specification, and electronic expansion valves 1 and 2 are opened simultaneously, so that the refrigerant passes evenly through electronic expansion valves 1 and 2. Under the action of the auxiliary solenoid valve 240, all the refrigerant is collected on the liquid line 210 at indoor unit 1 and finally output to indoor unit 1 (i.e., the high-power indoor unit).

[0053] Furthermore, such as Figure 4 As shown, in some embodiments of this application, the cooling mode control method further includes the following steps:

[0054] When the decrease in compressor operating frequency exceeds the first preset range, or when the decrease in outdoor ambient temperature exceeds the second preset range, the auxiliary solenoid valve 240 is closed.

[0055] When the compressor's exhaust temperature exceeds the preset temperature, the auxiliary solenoid valve 240 is opened again.

[0056] Specifically, in this example, when the compressor's operating frequency decreases by more than a first preset threshold (e.g., 10Hz or another value), it indicates that the required refrigerant flow rate is not too high, and the auxiliary solenoid valve 240 can be closed. Alternatively, when the outdoor ambient temperature decreases by more than a second preset threshold (e.g., 5°C or another value), it indicates that the cooling capacity is not large, and the auxiliary solenoid valve 240 can also be closed. When the compressor's discharge temperature rises again, until it exceeds 95°C or another value, the auxiliary solenoid valve 240 needs to be reopened to prevent the compressor discharge temperature from becoming too high.

[0057] It should be noted that in some embodiments of this application, each indoor unit 200 is connected to the outdoor unit 100 via a gas pipe 250, and each gas pipe 250 is equipped with a second shut-off valve 260. The compressor compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas, which is then delivered to the condenser on the outdoor unit 100 side. After heat exchange with the air through the fins, the gas liquefies into a high-pressure, medium-temperature liquid. The liquid refrigerant is depressurized via the liquid pipe 210 and the electronic expansion valve 230 before entering the evaporator on the indoor unit 200 side. There, it absorbs indoor heat and evaporates into a low-temperature, low-pressure gas, ultimately returning to the compressor via the gas pipe 250 to complete the cycle.

[0058] According to the cooling mode control method of this application embodiment, by setting an auxiliary solenoid valve 240 between two adjacent indoor units 200, the problem of the corresponding electronic expansion valve 230 specification not being applicable when the indoor units 200 of a multi-split air conditioner have large differences in specifications is solved; one specification of electronic expansion valve 230 can be adapted to different specifications of indoor units 200, and has good versatility.

[0059] On the other hand, embodiments of this application also provide a controller, including:

[0060] The processor can be implemented using a general-purpose central processing unit (CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to achieve the technical solutions provided in the embodiments of this application.

[0061] The memory can be implemented in the form of read-only memory (ROM), static storage device, dynamic storage device, or random access memory (RAM). The memory can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented through software or firmware, the relevant program code is stored in the memory and called and executed by the processor using the cooling mode control method of the embodiments of this application.

[0062] Input / output interfaces are used to implement information input and output;

[0063] The communication interface is used to enable communication and interaction between this device and other devices. Communication can be achieved through wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0064] A bus is used to transfer information between various components of a device, such as processors, memory, input / output interfaces, and communication interfaces.

[0065] The processor, memory, input / output interfaces, and communication interfaces communicate with each other within the device via a bus.

[0066] This application also provides a multi-split air conditioner, including the controller described above.

[0067] This application embodiment also provides a storage medium, which is a computer-readable storage medium, storing a computer program that, when executed by a processor, implements the above-described cooling mode control method.

[0068] Memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer-executable programs. Furthermore, memory may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, memory may optionally include memory remotely located relative to the processor, and these remote memories can be connected to the processor via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof. The device embodiments described above are merely illustrative, and the units described as separate components may or may not be physically separate, and may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0069] Although specific embodiments have been described herein, those skilled in the art will recognize that many other modifications or alternative embodiments are also within the scope of this disclosure. For example, any of the functions and / or processing capabilities described in connection with a particular device or component can be performed by any other device or component. Furthermore, while various exemplary embodiments and architectures have been described according to embodiments of this disclosure, those skilled in the art will recognize that many other modifications to the exemplary embodiments and architectures herein are also within the scope of this disclosure.

[0070] The foregoing description of certain aspects of this disclosure refers to block diagrams and flowcharts of systems, methods, systems, and / or computer program products according to exemplary embodiments. It should be understood that one or more blocks in the block diagrams and flowcharts, as well as combinations of blocks in the block diagrams and flowcharts, can be implemented by executing computer-executable program instructions, respectively. Similarly, according to some embodiments, some blocks in the block diagrams and flowcharts may not need to be executed in the order shown, or may not all need to be executed. Furthermore, additional components and / or operations beyond those shown in the blocks in the block diagrams and flowcharts may exist in some embodiments.

[0071] Therefore, blocks in block diagrams and flowcharts support combinations of means for performing a specified function, combinations of elements or steps for performing a specified function, and program instruction means for performing a specified function. It should also be understood that each block in a block diagram and flowchart, and combinations of blocks in block diagrams and flowcharts, can be implemented by a dedicated hardware computer system or a combination of dedicated hardware and computer instructions that performs a specific function, element, or step.

[0072] The program modules, applications, etc., described herein may include one or more software components, including, for example, software objects, methods, data structures, etc. Each such software component may include computer-executable instructions that, in response to execution, cause at least a portion of the functionality of this document (e.g., one or more operations of the exemplary methods described herein) to be performed.

[0073] Software components can be coded using any of a variety of programming languages. An exemplary programming language could be a low-level programming language, such as assembly language associated with a specific hardware architecture and / or operating system platform. Software components including assembly language instructions may need to be converted into executable machine code by an assembler before being executed by the hardware architecture and / or platform. Another exemplary programming language could be a higher-level programming language that is portable across multiple architectures. Software components including higher-level programming languages ​​may need to be converted into an intermediate representation by an interpreter or compiler before execution. Other examples of programming languages ​​include, but are not limited to, macro languages, shell or command languages, job control languages, scripting languages, database query or search languages, or report writing languages. In one or more exemplary embodiments, a software component containing instructions from one of the above-described programming language examples can be executed directly by the operating system or other software components without first being converted into another form.

[0074] Software components can be stored as files or other data storage structures. Software components of similar type or related function can be stored together in a specific directory, folder, or library. Software components can be static (e.g., pre-defined or fixed) or dynamic (e.g., created or modified at runtime).

[0075] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A cooling mode control method, characterized in that, This invention is applied to multi-split air conditioners, which include an outdoor unit and several indoor units. Each indoor unit is connected to the outdoor unit via a liquid pipe. Each liquid pipe is equipped with a first shut-off valve and an electronic expansion valve. An auxiliary solenoid valve is connected between the electronic expansion valves of every two adjacent indoor units. The cooling mode control method includes: When the compressor's discharge temperature is higher than the preset temperature and a high-power indoor unit is present, the first shut-off valve corresponding to the indoor unit adjacent to the high-power indoor unit is closed; the high-power indoor unit represents the indoor unit whose cooling capacity is greater than the preset cooling capacity. The auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit is opened, so that the refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then enters the high-power indoor unit after being combined at one point.

2. The cooling mode control method according to claim 1, characterized in that, The step of opening the auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit, so that the refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then merges together before being input into the high-power indoor unit, includes: Open the auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit; The electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit are opened at the same time. The refrigerant passes through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then merges at one point before being input into the high-power indoor unit.

3. The cooling mode control method according to claim 1, characterized in that, After the step of opening the auxiliary solenoid valve between the high-power indoor unit and the indoor unit adjacent to the high-power indoor unit, allowing the refrigerant to pass through the electronic expansion valve of the high-power indoor unit and the electronic expansion valve of the indoor unit adjacent to the high-power indoor unit, and then be combined and input into the high-power indoor unit, the method further includes: When the decrease in the operating frequency of the compressor exceeds a first preset range, or when the decrease in the outdoor ambient temperature exceeds a second preset range, the auxiliary solenoid valve is closed. When the exhaust temperature of the compressor is greater than the preset temperature, the auxiliary solenoid valve is opened again.

4. The cooling mode control method according to claim 1, characterized in that, Each indoor unit is connected to the outdoor unit via a gas pipe, and each gas pipe is equipped with a second shut-off valve.

5. The cooling mode control method according to claim 1, characterized in that, Each of the aforementioned electronic expansion valves has the same specifications.

6. The cooling mode control method according to claim 1, characterized in that, The high-power indoor unit refers to an indoor unit with a cooling capacity greater than 5 kilowatts.

7. The cooling mode control method according to claim 3, characterized in that, The first preset amplitude is 10 Hz, and the second preset amplitude is 5 degrees Celsius.

8. A controller, characterized in that, It includes at least one processor and a memory for communicatively connecting to the at least one processor; the memory stores instructions executable by the at least one processor, which, when executed by the at least one processor, enable the at least one processor to perform the cooling mode control method as described in any one of claims 1 to 7.

9. A multi-split air conditioner, characterized in that, Includes the controller as described in claim 8.

10. A storage medium, characterized in that, The storage medium is a computer-readable storage medium that stores computer-executable instructions for causing a computer to perform the cooling mode control method as described in any one of claims 1 to 7.

Images