Single-unit heating control method and device of multi-split air conditioner and multi-split air conditioner

Abstract

The invention provides a single-machine heating control method and device of a multi-split air conditioner and the multi-split air conditioner, and relates to the technical field of multi-split air conditioners. According to the method, under the conditions that an outdoor unit operates and a single indoor unit operates, the pressure value in a coil pipeline is collected; analyzing the pressure value and a plurality of preset pressure threshold ranges, and determining a pressure early warning level triggered by the pressure value of the coil pipeline; according to the pressure early warning grade, target operation corresponding to the pressure early warning grade is determined from preset operation, and the multi-split air conditioner is controlled to execute the target operation; the preset operation at least comprises the steps of reducing the running frequency of the compressor, reducing the rotating speed of the outer fan and controlling other indoor units to run for preset duration. The embodiment is used for solving the technical defect that in the prior art, pressure reduction cannot be achieved due to the fact that the pressure value is too high, the target operation for pressure reduction is determined by determining the pressure early warning level triggered by the pressure value, then the multi-split air conditioner is controlled to execute the target operation for pressure reduction, and pressure reduction is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-split air conditioners, and in particular to a single-machine heating control method and device for a multi-split air conditioner and the multi-split air conditioner. Background Art

[0002] A multi-split air conditioner is an air conditioner that consists of one or more indoor units and one or more outdoor units. When a multi-split air conditioner is operating alone, due to the large amount of refrigerant in the system, other indoor units that are not turned on do not dissipate the refrigerant on the high-pressure side, resulting in a high pressure on the indoor unit side. Especially when the ambient temperature is high, the pressure of the refrigerant rises rapidly, causing the system pressure switch to exceed the set value and report high pressure. When the pressure is too high, it may cause the compression ratio of the refrigerant to be too high, thus causing the compressor to fail. Summary of the invention

[0003] The present invention provides a single-machine heating control method and device for a multi-split air conditioner and a multi-split air conditioner, which are used to solve the technical defect in the prior art that the pressure value is too high and cannot be reduced. By analyzing the pressure value, the pressure warning level triggered by the pressure value is determined, thereby determining the target operation for reducing pressure, and then controlling the multi-split control to execute the target operation of reducing pressure to achieve pressure reduction.

[0004] In a first aspect, the present invention provides a single-unit heating control method for a multi-split air conditioner, the method being applied to a controller, the controller being connected to an outdoor unit and a plurality of indoor units respectively through communication signals, the outdoor unit being connected to each of the indoor units through a coil pipe, the outdoor unit comprising a compressor and an outdoor fan; the single-unit heating control method for the multi-split air conditioner comprising:

[0005] When the outdoor unit is running and a single indoor unit is running, collect the pressure value in the coil pipe;

[0006] Analyzing the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline;

[0007] According to the pressure warning level, a target operation corresponding to the pressure warning level is determined from preset operations, and the multi-split air conditioner is controlled to execute the target operation.

[0008] The preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

[0009] Preferably, according to a single-unit heating control method of a multi-split air conditioner provided by the present invention,

[0010] The analyzing the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline includes:

[0011] Comparing the pressure value with a boundary value of the pressure threshold range to determine whether the pressure value is within the pressure threshold range according to the comparison result;

[0012] According to the determination result, the pressure warning level triggered by the pressure value of the coil pipeline is determined.

[0013] Preferably, according to a single-unit heating control method of a multi-split air conditioner provided by the present invention,

[0014] The pressure threshold range includes: a first pressure range, a second pressure range, and a third pressure range;

[0015] The pressure warning levels include: first-level warning, second-level warning, and third-level warning;

[0016] Determining the pressure warning level corresponding to the pressure value of the coil pipeline according to the determination result includes:

[0017] If the determination result indicates that the pressure value is within the first pressure range, determining that the pressure value of the coil pipeline triggers the first-level warning;

[0018] In the case where the determination result indicates that the pressure value is within the second pressure range, determining that the pressure value of the coil pipeline triggers the second-level warning;

[0019] In a case where the determination result indicates that the pressure value is within the third pressure range, it is determined that the pressure value of the coil pipeline triggers the third-level warning.

[0020] Preferably, according to a single-unit heating control method of a multi-split air conditioner provided by the present invention,

[0021] The target operation corresponding to the first-level warning is to reduce the operating frequency of the compressor to the target frequency;

[0022] The target operation corresponding to the second-level warning is to reduce the operating frequency of the compressor to the target frequency and reduce the speed of the external fan to the target speed;

[0023] The target operation corresponding to the third-level warning is to reduce the operating frequency of the compressor to the target frequency, reduce the speed of the outdoor fan to the target speed and control the operation of other indoor units for a preset time.

[0024] Preferably, according to a single-unit heating control method of a multi-split air conditioner provided by the present invention,

[0025] The target frequency calculation step includes:

[0026] When the pressure value triggers the first-level warning, obtaining a preset pressure coefficient;

[0027] The pressure value, the lower limit value of the first pressure range, and the pressure coefficient are calculated to obtain the target frequency.

[0028] Preferably, according to a single-unit heating control method of a multi-split air conditioner provided by the present invention,

[0029] The step of calculating the target speed includes:

[0030] Calculating the pressure value and the lower limit of the second pressure range to obtain a pressure difference;

[0031] The pressure difference and the pressure coefficient are calculated to obtain the target rotation speed.

[0032] In a second aspect, the present invention further provides a single-unit heating control device for a multi-split air conditioner, the device being applied to a controller, the controller being respectively connected to an outdoor unit and a plurality of indoor units through communication signals, the outdoor unit being connected to each of the indoor units through a coil pipe, the outdoor unit comprising a compressor and an outdoor fan; the single-unit heating control device for a multi-split air conditioner comprising:

[0033] A collection module is used to collect the pressure value in the coil pipe when the outdoor unit is running and a single indoor unit is running;

[0034] An analysis module, configured to analyze the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline;

[0035] A control module is used to determine a target operation corresponding to the pressure warning level from preset operations according to the pressure warning level, and control the multi-split air conditioner to perform the target operation; the preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

[0036] In a third aspect, the present invention further provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the single-machine heating control method for a multi-split air conditioner as described above are implemented.

[0037] In a fourth aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the single-machine heating control method for a multi-split air conditioner as described in any of the above.

[0038] In a fifth aspect, the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the single-unit heating control method of any of the multi-split air conditioners described above.

[0039] In a sixth aspect, the present invention also provides a multi-split air conditioner, comprising a controller, an outdoor unit and multiple indoor units, wherein the controller is respectively connected to the outdoor unit and the multiple indoor units through communication signals, the outdoor unit is connected to each of the indoor units through a coil pipe, the outdoor unit comprises a compressor and an outdoor fan, and when the controller is executed, the steps of the single-machine heating control method of the multi-split air conditioner as described above are implemented.

[0040] The present invention provides a method and device for controlling heating of a single unit of a multi-split air conditioner, and a multi-split air conditioner. The method is applied to a controller, wherein the controller is respectively connected to an outdoor unit and multiple indoor units through communication signals, and the outdoor unit is connected to each of the indoor units through a coil pipe, wherein the outdoor unit includes a compressor and an outdoor fan; when the outdoor unit is running and a single indoor unit is running, the pressure value in the coil pipe is collected; the pressure value and a plurality of preset pressure threshold ranges are analyzed to determine the pressure warning level triggered by the pressure value of the coil pipe; according to the pressure warning level, a target operation corresponding to the pressure warning level is determined from preset operations, and the multi-split air conditioner is controlled to perform the target operation; the preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units. The method is used to solve the technical defect that the pressure value is too high and the pressure cannot be reduced in the prior art, and the pressure warning level triggered by the pressure value is determined by analyzing the pressure value, thereby determining the target operation for reducing pressure, and then controlling the multi-split air conditioner to perform the target operation of reducing pressure, thereby achieving pressure reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 This is one of the flow charts of the single-unit heating control method of the multi-split air conditioner provided by the present invention;

[0043] Figure 2 This is the second flow chart of the single-unit heating control method of the multi-split air conditioner provided by the present invention;

[0044] Figure 3It is a structural schematic diagram of a single-unit heating control device for a multi-split air conditioner provided by the present invention;

[0045] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Combine the following Figure 1-Figure 4 The present invention describes a single-unit heating control method and device of a multi-split air conditioner and a multi-split air conditioner, which are used to solve the technical defect in the prior art that the pressure value is too high and cannot be reduced. By analyzing the pressure value, the pressure warning level triggered by the pressure value is determined, thereby determining the target operation for pressure reduction, and then controlling the multi-split control to execute the target operation of pressure reduction to achieve pressure reduction.

[0048] The present invention also provides a multi-split air conditioner, comprising a controller, an outdoor unit and multiple indoor units, wherein the controller is respectively connected to the outdoor unit and the multiple indoor units through communication signals, the outdoor unit is connected to each of the indoor units through a coil pipe, the outdoor unit comprises a compressor and an outdoor fan, and when the controller is executed, the steps of any single-machine heating control method of the multi-split air conditioner are implemented.

[0049] like Figure 1 As shown, it is a schematic diagram of the implementation process of a single-unit heating control method of a multi-split air conditioner provided by an embodiment of the present invention. A single-unit heating control method of a multi-split air conditioner may include but is not limited to steps S100 to S300.

[0050] S100, when the outdoor unit is running and a single indoor unit is running, collecting the pressure value in the coil pipe;

[0051] S200, analyzing the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline;

[0052] S300, according to the pressure warning level, determine the target operation corresponding to the pressure warning level from the preset operations, and control the multi-split air conditioner to perform the target operation; the preset operations at least include reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

[0053] It should be noted that the execution subject of the single-unit heating control method of the multi-connected air conditioner in the embodiments of the present application can be a hardware device with data information processing capabilities and / or the necessary software for driving the operation of the hardware device.

[0054] Optionally, the execution subject may include, but is not limited to, workstations, servers, computers, user terminals, and other intelligent devices. Among them, user terminals include, but are not limited to, mobile phones, computers, intelligent voice interaction devices, intelligent home appliances, vehicle-mounted terminals, etc.

[0055] In step S100 of some embodiments, when the outdoor unit is operating and a single indoor unit is operating, the pressure value in the coil pipeline is collected.

[0056] It can be understood that after the multi-connected air conditioner receives the startup operation instruction, it controls the outdoor unit to operate. When a single indoor unit is operating, a pressure sensor is used to collect the pressure value in the coil pipeline.

[0057] It should be noted that the coil pipeline between the outdoor unit and multiple indoor units includes a main coil pipeline and multiple sub-coil pipelines. One end of the main coil pipeline is connected to the outdoor unit, and the end of the main coil pipeline far from the outdoor unit is connected to multiple sub-coil pipelines.

[0058] The pressure sensor is arranged at one end where the main pipeline is connected to multiple sub-coil pipelines.

[0059] In step S200 of some embodiments, the pressure value and a plurality of preset pressure threshold ranges are analyzed to determine the pressure warning level triggered by the pressure value of the coil pipeline.

[0060] It can be understood that after the step of collecting the pressure value in the coil pipeline in step S100 when the outdoor unit is operating and a single indoor unit is operating is completed, the specific execution steps can be: comparing the pressure value with the boundary values of the pressure threshold range to determine the pressure threshold range in which the pressure value is located according to the comparison result;

[0061] According to the determination result, determine the pressure warning level triggered by the pressure value of the coil pipeline.

[0062] It should be noted that the pressure threshold ranges include: a first pressure range, a second pressure range, a third pressure range, and a fourth pressure range.

[0063] The first pressure range is A = <M < B, the second pressure range is B = <M < C, the third pressure range is C = <M, and the fourth pressure range is M < A. Wherein, A < B < C.

[0064] Comparing the pressure value with the boundary values of the pressure threshold range includes:

[0065] Let the detected pressure value be Pd, and compare Pd with A, B, and C respectively, so as to determine the pressure threshold range in which the pressure value is located according to the comparison result.

[0066] If Pd is less than A, then Pd is in the fourth pressure range. Similarly,

[0067] If Pd is less than B and Pd is greater than or equal to A, then Pd is within the first pressure range. If Pd is less than C and Pd is greater than or equal to B, then Pd is within the second pressure range.

[0068] If Pd is greater than or equal to C, then Pd at this time is within the third pressure range.

[0069] The pressure warning levels include: level one warning, level two warning, and level three warning.

[0070] Further, determining the pressure warning level corresponding to the pressure value of the coil pipeline according to the determination result includes:

[0071] If the determination result indicates that the pressure value is within the first pressure range, determining that the pressure value of the coil pipeline triggers the first-level warning;

[0072] In the case where the determination result indicates that the pressure value is within the second pressure range, determining that the pressure value of the coil pipeline triggers the second-level warning;

[0073] In a case where the determination result indicates that the pressure value is within the third pressure range, it is determined that the pressure value of the coil pipeline triggers the third-level warning.

[0074] Furthermore, when Pd is within the first pressure range, Pd at this time will automatically trigger the early warning mechanism, that is, trigger the first level early warning.

[0075] The target operation corresponding to the first-level warning is to reduce the operating frequency of the compressor to the target frequency.

[0076] Furthermore, the target frequency calculation steps include:

[0077] When the pressure value triggers the first-level warning, obtaining a preset pressure coefficient;

[0078] The pressure value, the lower limit value of the first pressure range, and the pressure coefficient are calculated to obtain the target frequency.

[0079] The lower limit value of the first pressure range is A, the pressure coefficient is K, the pressure value corresponding to the first-level warning is Pd1, and the target frequency is F.

[0080] F=K*(Pd1-A)

[0081] The target frequency of the compressor can be calculated by the above formula.

[0082] Furthermore, when Pd is within the second pressure range, Pd at this time will automatically trigger the early warning mechanism, that is, trigger the second-level early warning.

[0083] The target operation corresponding to the second-level warning is to reduce the operating frequency of the compressor to the target frequency and reduce the speed of the external fan to the target speed.

[0084] Furthermore, the target speed calculation steps include:

[0085] Calculating the pressure value and the lower limit of the second pressure range to obtain a pressure difference;

[0086] The pressure difference and the pressure coefficient are calculated to obtain the target rotation speed.

[0087] The lower limit value of the second pressure range is B, and the pressure value corresponding to the second-level warning is Pd2, and the target frequency is R.

[0088] R=K*(Pd2-B)

[0089] The target speed of the external fan can be calculated using the above formula.

[0090] That is, Pd is within the third pressure range, and Pd at this time will automatically trigger the early warning mechanism, that is, trigger the third-level early warning.

[0091] The target operation corresponding to the third-level warning is to reduce the operating frequency of the compressor to the target frequency, reduce the speed of the outdoor fan to the target speed and control the operation of other indoor units for a preset time.

[0092] It should be further explained that when Pd is within the fourth pressure range, the multi-split air conditioner is controlled to operate normally without any parameter adjustment.

[0093] In step S300 of some embodiments, according to the pressure warning level, a target operation corresponding to the pressure warning level is determined from preset operations, and the multi-split air conditioner is controlled to execute the target operation.

[0094] The preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

[0095] It is understandable that after executing step S200, the specific execution steps may be: according to the first-level warning, determine the target operation corresponding to the first-level warning from the preset operations, and control the multi-split air conditioner to execute the target operation.

[0096] The target operation corresponding to the first-level warning is to reduce the operating frequency of the compressor to the target frequency.

[0097] According to the second-level warning, the target operation corresponding to the second-level warning is determined from the preset operations, that is, when the operating frequency of the compressor is reduced to the target frequency, the speed of the external fan is further reduced to the target speed.

[0098] According to the third-level warning, determine the target operation corresponding to the second-level warning from the preset operations.

[0099] That is, when the operating frequency of the compressor is reduced to the target frequency and the speed of the outdoor fan is reduced to the target speed, the operation of other indoor units is controlled for a preset time.

[0100] This can reduce the pressure in the coil pipe and avoid damage to the compressor.

[0101] Figure 2 This is the second flow chart of the single-machine heating control method of the multi-split air conditioner provided by the present invention. The pressure value Pd of the coil pipe is collected by a pressure sensor, and Pd is compared with A to determine whether the pressure value Pd triggers a first-level warning. If Pd is greater than or equal to A, a first-level warning is triggered, and the operating frequency of the compressor is reduced to the target frequency. If Pd is less than A, the multi-split air conditioner operates normally.

[0102] After the first-level warning is triggered, the pressure value Pd of the coil pipe is detected again at a preset interval, and then Pd at this time is compared with B. If Pd at this time is greater than or equal to B, then the second-level warning is triggered, and the speed of the outdoor fan is reduced to the target speed until the target speed reaches 0. If Pd at this time is less than B, it is compared with A again. If it is determined that Pd is greater than A and less than B, then the operating frequency of the compressor is only reduced to the target frequency to reduce the pressure.

[0103] After the second-level warning is triggered and the speed of the outdoor fan is controlled to be reduced to the target speed, after waiting for a preset time, the pressure value Pd of the coil pipe is collected again, and the pressure value Pd is compared with A, B, and C respectively. If the pressure value Pd at this time is greater than or equal to B and less than C, then only the second-level warning is triggered. If the pressure value Pd at this time is greater than or equal to C, then the third-level warning is triggered, and other indoor units are controlled to operate for a preset time to achieve pressure reduction.

[0104] It should be further explained that, to control the preset operation time of other indoor units, the preset operation time of the indoor units closer to the current indoor unit can be controlled first, and then it is determined whether the pressure value of the coil pipe has returned to normal. If the pressure value of the coil pipe has not returned to normal and the third-level warning is still triggered, the other indoor units are opened in sequence from near to far according to the pipe distance between the other indoor units and the current indoor unit to achieve decompression.

[0105] The present invention provides a method and device for controlling heating of a single unit of a multi-split air conditioner, and a multi-split air conditioner. The method is applied to a controller, wherein the controller is respectively connected to an outdoor unit and multiple indoor units through communication signals, and the outdoor unit is connected to each of the indoor units through a coil pipe, wherein the outdoor unit includes a compressor and an outdoor fan; when the outdoor unit is running and a single indoor unit is running, the pressure value in the coil pipe is collected; the pressure value and a plurality of preset pressure threshold ranges are analyzed to determine the pressure warning level triggered by the pressure value of the coil pipe; according to the pressure warning level, a target operation corresponding to the pressure warning level is determined from preset operations, and the multi-split air conditioner is controlled to perform the target operation; the preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units. The method is used to solve the technical defect that the pressure value is too high and the pressure cannot be reduced in the prior art, and the pressure warning level triggered by the pressure value is determined by analyzing the pressure value, thereby determining the target operation for reducing pressure, and then controlling the multi-split air conditioner to perform the target operation of reducing pressure, thereby achieving pressure reduction.

[0106] The single-unit heating control device of the multi-split air conditioner provided by the present invention is described below. The single-unit heating control device of the multi-split air conditioner described below and the single-unit heating control method of the multi-split air conditioner described above can be referred to each other.

[0107] Figure 3 : is a structural schematic diagram of a single-unit heating control device for a multi-split air conditioner provided by the present invention, wherein the single-unit heating control device for a multi-split air conditioner is applied to a controller, wherein the controller is respectively connected to an outdoor unit and a plurality of indoor units through communication signals, wherein the outdoor unit is connected to each of the indoor units through a coil pipe, wherein the outdoor unit includes a compressor and an outdoor fan; the single-unit heating control device for a multi-split air conditioner includes:

[0108] The collection module 310 is used to collect the pressure value in the coil pipe when the outdoor unit is running and a single indoor unit is running;

[0109] An analysis module 320, configured to analyze the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline;

[0110] The control module 330 is used to determine the target operation corresponding to the pressure warning level from the preset operations according to the pressure warning level, and control the multi-split air conditioner to perform the target operation; the preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

[0111] Preferably, the single-unit heating control device of the multi-split air conditioner provided by the present invention, the analysis module 320 is used to compare the pressure value with the boundary value of the pressure threshold range, so as to determine the pressure threshold range in which the pressure value is located according to the comparison result;

[0112] According to the determination result, the pressure warning level triggered by the pressure value of the coil pipeline is determined.

[0113] Preferably, in the single-unit heating control device of the multi-split air conditioner provided by the present invention, the pressure threshold range includes: a first pressure range, a second pressure range, and a third pressure range;

[0114] The pressure warning levels include: first-level warning, second-level warning, and third-level warning;

[0115] An analysis module 320, configured to determine that the pressure value of the coil pipeline triggers the first level warning when the determination result indicates that the pressure value is within the first pressure range;

[0116] In the case where the determination result indicates that the pressure value is within the second pressure range, determining that the pressure value of the coil pipeline triggers the second-level warning;

[0117] In a case where the determination result indicates that the pressure value is within the third pressure range, it is determined that the pressure value of the coil pipeline triggers the third-level warning.

[0118] Preferably, the single-unit heating control device of the multi-split air conditioner provided by the present invention is used for the target operation corresponding to the first-level warning to reduce the operating frequency of the compressor to the target frequency;

[0119] The target operation corresponding to the second-level warning is to reduce the operating frequency of the compressor to the target frequency and reduce the speed of the external fan to the target speed;

[0120] The target operation corresponding to the third-level warning is to reduce the operating frequency of the compressor to the target frequency, reduce the speed of the outdoor fan to the target speed and control the operation of other indoor units for a preset time.

[0121] Preferably, the single-unit heating control device of the multi-split air conditioner provided by the present invention is used to obtain a preset pressure coefficient when the pressure value triggers the first-level warning;

[0122] The pressure value, the lower limit value of the first pressure range, and the pressure coefficient are calculated to obtain the target frequency.

[0123] Preferably, the single-unit heating control device of the multi-split air conditioner provided by the present invention is used to calculate the pressure value and the lower limit value of the second pressure range to obtain a pressure difference value;

[0124] The pressure difference and the pressure coefficient are calculated to obtain the target rotation speed.

[0125] The present invention provides a method and device for controlling heating of a single unit of a multi-split air conditioner, and a multi-split air conditioner. The method is applied to a controller, wherein the controller is respectively connected to an outdoor unit and multiple indoor units through communication signals, and the outdoor unit is connected to each of the indoor units through a coil pipe, wherein the outdoor unit includes a compressor and an outdoor fan; when the outdoor unit is running and a single indoor unit is running, the pressure value in the coil pipe is collected; the pressure value and a plurality of preset pressure threshold ranges are analyzed to determine the pressure warning level triggered by the pressure value of the coil pipe; according to the pressure warning level, a target operation corresponding to the pressure warning level is determined from preset operations, and the multi-split air conditioner is controlled to perform the target operation; the preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units. The method is used to solve the technical defect that the pressure value is too high and the pressure cannot be reduced in the prior art, and the pressure warning level triggered by the pressure value is determined by analyzing the pressure value, thereby determining the target operation for reducing pressure, and then controlling the multi-split air conditioner to perform the target operation of reducing pressure, thereby achieving pressure reduction.

[0126] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute a single-machine heating control method for a multi-split air conditioner, the method comprising: collecting the pressure value in the coil pipe when the outdoor unit is running and a single indoor unit is running; analyzing the pressure value and a plurality of preset pressure threshold ranges to determine the pressure warning level triggered by the pressure value of the coil pipe; determining the target operation corresponding to the pressure warning level from the preset operations according to the pressure warning level, and controlling the multi-split air conditioner to execute the target operation.

[0127] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0128] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the single-machine heating control method of the multi-split air conditioner provided by the above-mentioned methods. The method includes: when the outdoor unit is running and a single indoor unit is running, collecting the pressure value in the coil pipe; analyzing the pressure value and a preset plurality of pressure threshold ranges to determine the pressure warning level triggered by the pressure value of the coil pipe; according to the pressure warning level, determining the target operation corresponding to the pressure warning level from the preset operations, and controlling the multi-split air conditioner to perform the target operation.

[0129] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the single-machine heating control method of a multi-split air conditioner provided by the above-mentioned methods, the method comprising: when the outdoor unit is running and a single indoor unit is running, collecting the pressure value in the coil pipe; analyzing the pressure value and a preset plurality of pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipe; according to the pressure warning level, determining a target operation corresponding to the pressure warning level from preset operations, and controlling the multi-split air conditioner to perform the target operation.

[0130] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0131] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling heating of a single unit of a multi-split air conditioner, characterized in that: The method is applied to a controller, wherein the controller is respectively connected to an outdoor unit and a plurality of indoor units through communication signals, the outdoor unit is connected to each of the indoor units through a coil pipe, and the outdoor unit includes a compressor and an outdoor fan; The single-unit heating control method of the multi-split air conditioner comprises: When the outdoor unit is running and a single indoor unit is running, collect the pressure value in the coil pipe; Analyzing the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline; According to the pressure warning level, determining a target operation corresponding to the pressure warning level from preset operations, and controlling the multi-split air conditioner to perform the target operation; The preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

2. The method for controlling heating of a single unit of a multi-split air conditioner according to claim 1, characterized in that: The analyzing the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline includes: Comparing the pressure value with a boundary value of the pressure threshold range to determine whether the pressure value is within the pressure threshold range according to the comparison result; According to the determination result, the pressure warning level triggered by the pressure value of the coil pipeline is determined.

3. The method for controlling heating of a single unit of a multi-split air conditioner according to claim 2, characterized in that: The pressure threshold range includes: a first pressure range, a second pressure range, and a third pressure range; The pressure warning levels include: first-level warning, second-level warning, and third-level warning; Determining the pressure warning level corresponding to the pressure value of the coil pipeline according to the determination result includes: If the determination result indicates that the pressure value is within the first pressure range, determining that the pressure value of the coil pipeline triggers the first-level warning; In the case where the determination result indicates that the pressure value is within the second pressure range, determining that the pressure value of the coil pipeline triggers the second-level warning; In a case where the determination result indicates that the pressure value is within the third pressure range, it is determined that the pressure value of the coil pipeline triggers the third-level warning.

4. The method for controlling heating of a single unit of a multi-split air conditioner according to claim 3, characterized in that: The method comprises: The target operation corresponding to the first-level warning is to reduce the operating frequency of the compressor to the target frequency; The target operation corresponding to the second-level warning is to reduce the operating frequency of the compressor to the target frequency and reduce the speed of the external fan to the target speed; The target operation corresponding to the third-level warning is to reduce the operating frequency of the compressor to the target frequency, reduce the speed of the outdoor fan to the target speed and control the operation of other indoor units for a preset time.

5. The method for controlling heating of a single unit of a multi-split air conditioner according to claim 4, characterized in that: The target frequency calculation step includes: When the pressure value triggers the first-level warning, obtaining a preset pressure coefficient; The pressure value, the lower limit value of the first pressure range, and the pressure coefficient are calculated to obtain the target frequency.

6. The method for controlling heating of a single unit of a multi-split air conditioner according to claim 5, characterized in that: The step of calculating the target speed includes: Calculating the pressure value and the lower limit of the second pressure range to obtain a pressure difference; The pressure difference and the pressure coefficient are calculated to obtain the target rotation speed.

7. A single-unit heating control device for a multi-split air conditioner, characterized in that: The device is applied to a controller, the controller is respectively connected with an outdoor unit and a plurality of indoor units through communication signals, the outdoor unit is connected with each of the indoor units through a coil pipe, and the outdoor unit includes a compressor and an outdoor fan; The single-unit heating control device of the multi-split air conditioner comprises: A collection module is used to collect the pressure value in the coil pipe when the outdoor unit is running and a single indoor unit is running; An analysis module, configured to analyze the pressure value and a plurality of preset pressure threshold ranges to determine a pressure warning level triggered by the pressure value of the coil pipeline; A control module is used to determine a target operation corresponding to the pressure warning level from preset operations according to the pressure warning level, and control the multi-split air conditioner to perform the target operation; the preset operation at least includes reducing the operating frequency of the compressor, reducing the speed of the outdoor fan, and controlling the preset operation time of other indoor units.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the single-unit heating control method of the multi-split air conditioner as described in any one of claims 1 to 6 are implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the single-unit heating control method of a multi-split air conditioner as described in any one of claims 1 to 6 are implemented.

10. A multi-split air conditioner, comprising a controller, an outdoor unit and a plurality of indoor units, wherein the controller is respectively connected to the outdoor unit and the plurality of indoor units through communication signals, the outdoor unit is connected to each of the indoor units through a coil pipe, the outdoor unit comprises a compressor and an outdoor fan, and is characterized in that: When executed, the controller implements the steps of the single-unit heating control method of the multi-split air conditioner as described in any one of claims 1 to 6.

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