Multi-connected air conditioning system, control method thereof, computer device and storage medium

Abstract

The present application relates to air conditioning technical field, specifically provide a kind of multi-connected air conditioning system and its control method, computer equipment, storage medium, to solve the problem of effectively improving the refrigeration and heating capacity of terminal indoor unit in multi-connected air conditioning system.The method provided by the present application includes the first indoor unit temperature of terminal indoor unit located at the end of refrigerant pipeline and at least one non-terminal indoor unit not located at the end of refrigerant pipeline is obtained and corrected under the operation condition;Obtain the second indoor unit temperature of each non-terminal indoor unit running;According to the first average temperature of the first indoor unit temperature after correction and the second indoor unit temperature, the operating frequency of the compressor in outdoor unit is controlled;Wherein, the first indoor unit temperature after correction is closer to the first average temperature than the second indoor unit temperature.Based on the above method, the refrigeration and heating capacity of terminal indoor unit can be effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a multi-split air conditioning system, a control method thereof, computer equipment and a storage medium. BACKGROUND

[0002] The multi-split air conditioning system usually adopts a one-to-many system, that is, it includes one outdoor unit and multiple indoor units, and the indoor units are connected with the outdoor unit through a set of refrigerant pipelines. Due to the extension of the refrigerant pipeline, the resistance loss of the refrigerant in the pipeline will also increase, and other reasons may cause the refrigeration and heating capacity of the indoor unit located at the end of the refrigerant pipeline to decrease, and even may not meet the user's refrigeration and heating demand for the end indoor unit.

[0003] Correspondingly, there is a need in the art for a new technical solution to solve the above problems. SUMMARY

[0004] In order to overcome the above defects, the present application is proposed to provide a multi-split air conditioning system, a control method thereof, computer equipment and a storage medium, which solve or at least partially solve the technical problem of effectively improving the refrigeration and heating capacity of the indoor unit located at the end of the refrigerant pipeline in the multi-split air conditioning system.

[0005] In a first aspect, a control method of a multi-split air conditioning system is provided, the multi-split air conditioning system including multiple indoor units connected with an outdoor unit through refrigerant pipelines, and the method comprising:

[0006] In the case where an end indoor unit located at the end of the refrigerant pipeline and at least one non-end indoor unit not located at the end of the refrigerant pipeline are running,

[0007] obtaining and correcting a first indoor temperature of the end indoor unit;

[0008] obtaining a second indoor temperature of each non-end indoor unit running;

[0009] controlling the running frequency of the compressor in the outdoor unit according to a first average temperature of the corrected first indoor temperature and the second indoor temperature;

[0010] Wherein, the corrected first indoor temperature is closer to the first average temperature than the second indoor temperature.

[0011] In one technical solution of the above control method of the multi-split air conditioning system, the step of "correcting the first indoor temperature of the end indoor unit" specifically comprises:

[0012] If the running mode is a refrigeration mode, the first indoor temperature is increased;

[0013] If the running mode is a heating mode, the first indoor temperature is decreased.

[0014] In one of the technical solutions of the control method of the multi-connected air conditioning system, the step of "increasing the first indoor unit temperature" specifically comprises: obtaining a product of a preset first correction coefficient and the first indoor unit temperature as the increased first indoor unit temperature, wherein the first correction coefficient is greater than 1 and less than or equal to a first threshold value;

[0015] and / or,

[0016] The step of "decreasing the first indoor unit temperature" specifically comprises: obtaining a product of a preset second correction coefficient and the first indoor unit temperature as the decreased first indoor unit temperature, wherein the second correction coefficient is greater than or equal to a second threshold value and less than 1.

[0017] In one of the technical solutions of the control method of the multi-connected air conditioning system, the first correction coefficient is 1.5 and / or the second correction coefficient is 0.8.

[0018] In one of the technical solutions of the control method of the multi-connected air conditioning system, the method further comprises, in the case that only the terminal indoor unit is running or both the terminal indoor unit and the intermediate indoor unit are running,

[0019] obtaining a second average temperature of third indoor unit temperatures of the running indoor units;

[0020] controlling the running frequency of the compressor according to the second average temperature.

[0021] In one of the technical solutions of the control method of the multi-connected air conditioning system, the method further comprises, in the case that the running mode is a cooling mode, controlling the running frequency of the compressor according to a target average temperature and by the following manner:

[0022] comparing the target average temperature with a preset first temperature threshold value;

[0023] if the target average temperature is greater than the first temperature threshold value, increasing the running frequency; if the target average temperature is less than the first temperature threshold value, decreasing the running frequency; if the target average temperature is equal to the first temperature threshold value, not changing the running frequency; wherein the target average temperature is the first average temperature or the second average temperature;

[0024] and / or,

[0025] The method further comprises, in the case that the running mode is a heating mode, controlling the running frequency of the compressor according to a target average temperature and by the following manner:

[0026] comparing the target average temperature with a preset second temperature threshold value;

[0027] If the target average temperature is greater than the second temperature threshold, the operating frequency is decreased; if the target average temperature is less than the second temperature threshold, the operating frequency is increased; and if the target average temperature is equal to the second temperature threshold, the operating frequency is not changed; wherein the target average temperature is the first average temperature or the second average temperature.

[0028] In one of the technical solutions of the control method of the multi-connected air conditioning system, the method further comprises obtaining the first indoor unit temperature and the second indoor unit temperature by the following manner:

[0029] The temperature at a preset position of the liquid refrigerant pipe in the terminal indoor unit is obtained as the first indoor unit temperature, and the temperature at the preset position of the liquid refrigerant pipe in each non-terminal indoor unit is obtained as the second indoor unit temperature.

[0030] Alternatively,

[0031] The method further comprises obtaining the third indoor unit temperature by the following manner: the temperature at the preset position of the liquid refrigerant pipe in each indoor unit is obtained as the third indoor unit temperature.

[0032] In the second aspect, a computer device is provided, which comprises a processor and a storage device, the storage device is adapted to store a plurality of program codes, the program codes are adapted to be loaded and run by the processor to execute the method in any one of the technical solutions of the control method of the multi-connected air conditioning system.

[0033] In the third aspect, a multi-connected air conditioning system is provided, which comprises a plurality of indoor units connected with an outdoor unit through a refrigerant pipe, and the computer device in the technical solution of the computer device.

[0034] In the fourth aspect, a computer readable storage medium is provided, which has a plurality of program codes stored therein, the program codes are adapted to be loaded and run by a processor to execute the method in any one of the technical solutions of the control method of the multi-connected air conditioning system.

[0035] The above one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0036] In the technical scheme of the control method of the multi-connected air conditioning system, the multi-connected air conditioning system comprises at least a plurality of indoor units connected with an outdoor unit through refrigerant pipelines. When the end indoor unit located at the end of the refrigerant pipeline and at least one non-end indoor unit not located at the end of the refrigerant pipeline are running, the first indoor unit temperature of the end indoor unit can be obtained and corrected, the second indoor unit temperature of each running non-end indoor unit can be obtained, and then the running frequency of the compressor in the outdoor unit is controlled according to the first average temperature of the corrected first indoor unit temperature and the second indoor unit temperature. The corrected first indoor unit temperature is closer to the average temperature than the second indoor unit temperature. Therefore, when the running frequency of the compressor in the outdoor unit is controlled according to the first average temperature, the temperature of the end indoor unit is actually controlled, so that even if the heat exchange capacity (cooling or heating capacity) of the end indoor unit is reduced due to the end of the refrigerant pipeline, the running frequency of the compressor can be adjusted according to the first average temperature to compensate for the reduction of the heat exchange capacity, thereby effectively ensuring the running capacity of the end indoor unit. BRIEF DESCRIPTION OF DRAWINGS

[0037] The disclosure of the present application will become more fully understood from the detailed description given herein below, and appended claims, accompanied by the accompanying drawings. As those skilled in the art will appreciate, the drawings are not intended to limit the scope of the present application, but are merely intended for illustration:

[0038] Figure 1 is a main step flow diagram of the control method of the multi-connected air conditioning system according to an embodiment of the present application, when the end indoor unit located at the end of the refrigerant pipeline and at least one non-end indoor unit not located at the end of the refrigerant pipeline are running;

[0039] Figure 2 is a position diagram of a temperature sensor according to an embodiment of the present application;

[0040] Figure 3 is a position diagram of a temperature sensor when running in a cooling mode according to an embodiment of the present application;

[0041] Figure 4 is a position diagram of a temperature sensor when running in a heating mode according to an embodiment of the present application;

[0042] Figure 5 is a main step flow diagram of the method for correcting the second indoor unit temperature of the end indoor unit according to an embodiment of the present application;

[0043] Figure 6 is a main step flow diagram of the method for controlling the running frequency of the compressor according to the average temperature in the cooling mode according to an embodiment of the present application;

[0044] Figure 7 This is a schematic flowchart of the main steps of a method for controlling the operating frequency of a compressor based on the average temperature in heating mode according to an embodiment of the present invention.

[0045] Figure 8 This is a schematic flowchart of the main steps of a control method for a multi-split air conditioning system according to an embodiment of the present invention, when the terminal indoor unit is not running or only the terminal indoor unit is running;

[0046] Figure 9 This is a schematic diagram of the main structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0047] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0048] In the description of this invention, "processor" can include hardware, software, or a combination of both. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B.

[0049] The following describes an embodiment of the control method for a multi-split air conditioning system.

[0050] See appendix Figure 1 , Figure 1 This is a control method for a multi-split air conditioning system according to an embodiment of the present invention. In this embodiment, the multi-split air conditioning system includes one outdoor unit and multiple indoor units, with each indoor unit sharing a set of refrigerant piping connected to the outdoor unit. Figure 1 As shown, when the terminal indoor unit located at the end of the refrigerant pipeline and at least one non-terminal indoor unit not located at the end of the refrigerant pipeline are operating, control can be achieved through the following steps S101 to S103.

[0051] Step S101: Obtain and correct the first indoor unit temperature of the terminal indoor unit.

[0052] In the multi-connected air conditioning system, each indoor unit is connected with the outdoor unit through a set of common refrigerant pipeline, and each indoor unit is also provided with a set of refrigerant pipeline composed of liquid refrigerant pipeline and gaseous refrigerant pipeline. The liquid refrigerant pipeline and the gaseous refrigerant pipeline can be communicated with the common refrigerant pipeline to realize the flow of refrigerant and ensure the normal operation of each indoor unit, such as refrigeration or heating.

[0053] In the embodiment, the temperature of the refrigerant pipeline in the terminal indoor unit can be obtained, for example, a temperature sensor can be arranged at a predetermined position of the refrigerant pipeline to obtain the temperature according to the temperature sensor. In some preferred embodiments, the temperature at a predetermined position of the liquid refrigerant pipeline in the terminal indoor unit can be obtained. Further, as shown in Figure 2 , an electronic expansion valve for adjusting the flow of refrigerant in the liquid refrigerant pipeline can be arranged on the liquid refrigerant pipeline, and the temperature sensor can be arranged on the liquid refrigerant pipeline between the electronic expansion valve and the indoor heat exchanger. Referring to Figure 3 , the flow path of the refrigerant in the indoor unit when operating in the refrigeration mode is shown by the dashed arrow in Figure 3 , the medium-temperature and medium-pressure liquid refrigerant becomes low-temperature and low-pressure liquid refrigerant after throttling by the indoor electronic expansion valve and enters the indoor heat exchanger. The temperature collected by the temperature sensor is the temperature of the low-temperature and low-pressure liquid refrigerant after throttling, which can be about 10°C. Referring to Figure 4 , the flow path of the refrigerant in the indoor unit when operating in the heating mode is shown by the dashed arrow in Figure 4 , the indoor heat exchanger converts the high-temperature and high-pressure gaseous refrigerant into medium-temperature and medium-pressure liquid refrigerant, which enters the indoor electronic expansion valve. The opening degree of the indoor electronic expansion valve is large when heating, so there is no obvious throttling effect, and the indoor electronic expansion valve still outputs medium-temperature and medium-pressure liquid refrigerant. The temperature collected by the temperature sensor is the temperature of the medium-temperature and medium-pressure liquid refrigerant before entering the indoor electronic expansion valve, which can be above 40°C.

[0054] In the embodiment, the average temperature of the indoor unit temperatures of the operating indoor units is obtained, and the operating frequency of the compressor in the outdoor unit is controlled according to the average temperature. The purpose of correcting the first indoor unit temperature of the terminal indoor unit is to make the corrected first indoor unit temperature closer to the above-mentioned average temperature than the non-terminal indoor unit. In this way, in the control process, the operating requirements (refrigeration or heating requirements) of the terminal indoor unit can be focused on, the decrease in operating capacity (refrigeration or heating capacity) caused by being located at the end of the refrigerant pipeline is compensated, and the operating capacity of the terminal indoor unit is improved.

[0055] Step S102: obtaining the second indoor unit temperature of each non-terminal indoor unit.

[0056] The second indoor unit temperature of the non-terminal indoor unit and the first indoor unit temperature of the terminal indoor unit are temperatures of the same part in the indoor unit, and the first and second indoor unit temperatures are obtained by the same method. For example, if the first indoor unit temperature is the temperature at a preset position of the refrigerant pipe in the terminal indoor unit, then the second indoor unit temperature is also the temperature at the preset position of the refrigerant pipe in the non-terminal indoor unit.

[0057] Step S103: controlling the operating frequency of the compressor in the outdoor unit according to the first average temperature of the corrected first indoor unit temperature and the second indoor unit temperature.

[0058] Based on the first average temperature, it can be determined whether the current multi-split air conditioning system meets the operating requirements. If not, the operating frequency of the compressor can be adjusted until the operating requirements are met. If yes, the operating frequency of the compressor can not be adjusted.

[0059] In some embodiments, when installing the multi-split air conditioning system, it can be determined which indoor unit is the terminal indoor unit first, and then the line controller of the multi-split air conditioning system is used to set this indoor unit as the terminal indoor unit, and the indoor units that are not set are non-terminal indoor units. In addition, the indoor unit can also be set as the terminal indoor unit by the computer version of the indoor unit dial code, and the indoor units that are not set are non-terminal indoor units. When executing the above control method of the multi-split air conditioning system, it can be determined which indoor unit is the terminal indoor unit and which indoor units are non-terminal indoor units according to the setting information of the terminal indoor unit.

[0060] Based on the above steps S101 to S103, the operating capacity of the terminal indoor unit in the multi-split air conditioning system can be effectively improved, and the terminal indoor unit has better refrigeration and heating effects.

[0061] The above steps S101 and S103 are further described below.

[0062] I. Explanation of step S101.

[0063] In some embodiments of the above step S101, the first indoor unit temperature of the terminal indoor unit can be corrected by the following steps S1011 to S1013 shown in the figure. Figure 5

[0064] Step S1011: obtaining the mode of the multi-split air conditioning system.

[0065] ​When the mode is the cooling mode, the second indoor unit temperature of the non-terminal indoor unit is usually less than the first indoor unit temperature of the terminal indoor unit. If the first indoor unit temperature is not corrected, the second indoor unit temperature is likely to be closer to the first average temperature of the first and second indoor unit temperatures than the first indoor unit temperature. Further, if it is determined according to the average temperature that the operation demand of the multi-connected air conditioning system can be met, the operation frequency of the compressor may not be changed, or even the operation frequency may be reduced in the case of having a certain operation capacity margin for the purpose of energy saving. In summary, the operation frequency will not be increased in the case of meeting the operation demand. However, the operation frequency not being increased will make it difficult to improve the operation capacity of the terminal indoor unit. In this regard, the first indoor unit temperature of the terminal indoor unit needs to be increased to improve the first average temperature, so that the first indoor unit temperature is closer to the first average temperature than the second indoor unit temperature. Therefore, when the mode is the cooling mode, go to step S1012 to increase the first indoor unit temperature.

[0066] When the mode is the heating mode, the second indoor unit temperature of the non-terminal indoor unit is usually greater than the first indoor unit temperature of the terminal indoor unit. If the first indoor unit temperature is not corrected, the second indoor unit temperature is likely to be closer to the first average temperature than the first indoor unit temperature. Further, if it is determined according to the average temperature that the operation demand of the multi-connected air conditioning system can be met, the operation frequency of the compressor may not be changed, or even the operation frequency may be reduced in the case of having a certain operation capacity margin for the purpose of energy saving. In summary, the operation frequency will not be increased in the case of meeting the operation demand. However, the operation frequency not being increased will make it difficult to improve the operation capacity of the terminal indoor unit. In this regard, the first indoor unit temperature of the terminal indoor unit needs to be reduced to reduce the first average temperature, so that the first indoor unit temperature is closer to the first average temperature than the second indoor unit temperature. Therefore, when the mode is the heating mode, go to step S1013 to reduce the first indoor unit temperature.

[0067] Step S1012: Increase the first indoor unit temperature of the terminal indoor unit.

[0068] In some embodiments, a preset first correction coefficient greater than 1 and less than or equal to a first threshold value can be obtained, and a product of the first correction coefficient and the first indoor unit temperature can be obtained as the first indoor unit temperature after being increased. The first average temperature is a relatively low temperature value when the multi-split air conditioning system is operated in the cooling mode, and therefore a smaller value can be selected as the first threshold value to avoid that the first average temperature is increased too much after the first indoor unit temperature is increased, which affects the normal cooling of the multi-split air conditioning system. For example, the first average temperature is usually about 10°C without changing the first temperature when the multi-split air conditioning system is operated in the cooling mode, and the first threshold value can be set to 1.5. In some preferred embodiments, the first correction coefficient can be directly set to 1.5.

[0069] Step S1013: reducing the first indoor unit temperature of the terminal indoor unit.

[0070] In some embodiments, a preset second correction coefficient greater than or equal to a second threshold value and less than 1 can be obtained, and a product of the second correction coefficient and the first indoor unit temperature can be obtained as the first indoor unit temperature after being reduced. The first average temperature is a relatively high temperature value when the multi-split air conditioning system is operated in the heating mode, and therefore a larger value can be selected as the second threshold value to avoid that the first average temperature is reduced too much after the first indoor unit temperature is reduced, which affects the normal heating of the multi-split air conditioning system. For example, the first average temperature is usually about 40°C without changing the first temperature when the multi-split air conditioning system is operated in the heating mode, and the second threshold value can be set to 0.8. In some preferred embodiments, the second correction coefficient can be directly set to 0.8.

[0071] Based on the method described in steps S1011 to S1013, different methods can be used to adjust the first indoor unit temperature according to different operating modes of the multi-split air conditioning system, so that the first indoor unit temperature is closer to the first average temperature than the second indoor unit temperature in different operating modes, thereby effectively ensuring the operating capacity of the terminal indoor unit in different operating modes.

[0072] II. Explanation of step S103

[0073] In different operating modes, the operating frequency of the compressor can be controlled according to the first average temperature and by different methods. The compressor operating frequency control methods in the cooling mode and the heating mode will be described below with reference to the accompanying drawings.

[0074] 1. Compressor operating frequency control method in the cooling mode

[0075] In the embodiments of the present application, the first average temperature can be calculated byFigure 6 The following steps S201 to S204 are used to control the operating frequency of the compressor.

[0076] Step S201: Compare the first average temperature with the preset first temperature threshold.

[0077] If the first average temperature is greater than the preset first temperature threshold, it indicates that the current cooling demand of the multi-split air conditioning system cannot be met, and the operating frequency of the compressor needs to be increased to improve the cooling capacity. Therefore, the process can proceed to step S202 to increase the operating frequency.

[0078] If the first average temperature is equal to the preset first temperature threshold, it indicates that the current cooling demand of the multi-split air conditioning system can be met, but there is no cooling capacity margin. The operating frequency can be kept unchanged. Therefore, the process can proceed to step S203 without changing the operating frequency.

[0079] If the first average temperature is less than the preset first temperature threshold, it indicates that the current cooling demand of the multi-split air conditioning system can be met and there is still a certain cooling capacity margin. The operating frequency can be kept unchanged. However, considering the need for energy saving, the operating frequency can also be reduced, that is, the cooling capacity can be reduced. Therefore, at this time, we can go to step S204 to reduce the operating frequency.

[0080] In this embodiment, the specific value of the preset first temperature threshold can be flexibly set according to actual needs, and the embodiment of the present invention does not impose specific limitations.

[0081] Step S202: Increase the operating frequency.

[0082] Step S203: Do not change the operating frequency.

[0083] Step S204: Reduce the operating frequency.

[0084] Based on the method described in steps S201 to S204 above, the overall cooling capacity of the multi-split air conditioning system can be flexibly adjusted based on the first average temperature while improving the cooling capacity of the terminal indoor unit, so as to meet the cooling demand.

[0085] 2. Compressor operating frequency control method in cooling mode

[0086] In embodiments of the present invention, it can be achieved through Figure 7 The following steps S301 to S304 are used to control the operating frequency of the compressor.

[0087] Step S301: Compare the first average temperature with a preset second temperature threshold.

[0088] If the first average temperature is greater than a preset second temperature threshold, it indicates that the heating demand of the multi-split air conditioning system can be met at present and there is still a certain heating capacity margin, the operating frequency can be kept unchanged, but considering the demand of energy saving, the operating frequency can also be reduced, i.e. the heating capacity is reduced, therefore, at this time, it can be switched to step S302 to reduce the operating frequency.

[0089] If the first average temperature is equal to the preset second temperature threshold, it indicates that the heating demand of the multi-split air conditioning system can be met at present, but there is no heating capacity margin, the operating frequency can be kept unchanged, therefore, at this time, it can be switched to step S303 to keep the operating frequency unchanged.

[0090] If the first average temperature is less than the preset first temperature threshold, it indicates that the heating demand of the multi-split air conditioning system cannot be met at present, the operating frequency of the compressor needs to be increased to improve the heating capacity, therefore, at this time, it can be switched to step S304 to increase the operating frequency.

[0091] In the embodiment, the specific value of the preset second temperature threshold can be flexibly set according to actual demand, which is not specifically limited in the embodiment of the application.

[0092] Step S302: reducing the operating frequency.

[0093] Step S303: keeping the operating frequency unchanged.

[0094] Step S304: increasing the operating frequency.

[0095] Based on the method described in steps S301 to S304, the overall heating capacity of the multi-split air conditioning system can be flexibly adjusted to meet the heating demand in the case of improving the heating capacity of the terminal indoor unit based on the first average temperature.

[0096] Further, in the control method of the multi-split air conditioning system provided in the embodiment of the application, in the case that the terminal indoor unit is not running or only the terminal indoor unit is running, the operating frequency of the compressor can be controlled through the following steps S401 to S402 shown in the figure. Figure 8

[0097] Step S401: acquiring a second average temperature of third indoor unit temperatures of the running indoor units. The acquisition method of the third indoor unit temperature is the same as that of the first and second indoor unit temperatures in the foregoing method embodiment, which will not be described herein again.

[0098] Step S402: controlling the operating frequency of the compressor according to the second average temperature.

[0099] The method of this step is the same as the method of controlling the operating frequency of the compressor according to the first average temperature in the foregoing method embodiment, for example, the operating frequency of the compressor is reduced when the second average temperature is greater than the preset second temperature threshold, the operating frequency of the compressor is kept unchanged when the second average temperature is equal to the preset second temperature threshold, and the operating frequency of the compressor is increased when the second average temperature is less than the preset first temperature threshold. Figure 6 and​Figure 7 The first average temperature in the method shown is replaced by the second average temperature.

[0100] When the terminal indoor unit is not running, there is no need to consider the problem of improving its running capacity, and thus there is no need to perform the step of obtaining and correcting the indoor unit temperature, and the average of the indoor unit temperatures of the running indoor units can be directly obtained, and the compressor running frequency control is performed according to the average.

[0101] When only the terminal indoor unit is running, the compressor running frequency control is necessarily performed according to the indoor unit temperature of the terminal indoor unit, and there is no problem of improving its running capacity, and thus there is no need to perform the step of obtaining and correcting the indoor unit temperature.

[0102] Based on the method described in the steps S401 to S402, the reliable control of the compressor running frequency can be achieved without considering the problem of improving the running capacity of the terminal indoor unit.

[0103] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art can understand that, in order to achieve the effect of the present application, the different steps do not necessarily have to be executed in such an order, and they can be executed simultaneously (in parallel) or in other orders, and these adjusted schemes belong to equivalent technical schemes and thus fall within the protection scope of the present application.

[0104] Those skilled in the art can understand that all or part of the processes in the method of the above embodiment can also be completed by a computer program instructing related hardware, and the computer program can be stored in a computer readable storage medium, and the computer program can implement the steps of each method embodiment when executed by a processor. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The computer readable storage medium can include any entity or device, medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code. It should be noted that the contents included in the computer readable storage medium can be appropriately added or reduced according to the requirements of legislation and patent practice in the jurisdiction, for example, in some jurisdictions, according to legislation and patent practice, the computer readable storage medium does not include electrical carrier signals and telecommunication signals.

[0105] Further, the present application also provides a computer device.

[0106] Referring to the drawings Figure 9 ,Figure 9 is a schematic diagram of the main structure of a computer device according to an embodiment of the present application. As shown in Figure 9 the computer device in the embodiment of the present application mainly comprises a storage device and a processor, the storage device can be configured to store a program for implementing the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment, and the processor can be configured to execute the program in the storage device, which includes but is not limited to the program for implementing the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment. For the convenience of description, only the parts related to the embodiment of the present application are shown, and the specific technical details not disclosed are referred to the method part of the embodiment of the present application.

[0107] In the embodiment of the present application, the computer device can be a control device formed by various electronic devices. In some possible implementations, the computer device can comprise a plurality of storage devices and a plurality of processors. And the program for implementing the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment can be divided into a plurality of sub-programs, each of which can be loaded and run by the processor to execute different steps of the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment. Specifically, each sub-program can be stored in a different storage device, and each processor can be configured to execute the program in one or more storage devices to jointly implement the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment, i.e., each processor executes different steps of the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment to jointly implement the control method of the multi-connected air conditioning system according to the above-mentioned method embodiment.

[0108] The above-mentioned plurality of processors can be processors deployed on the same device, for example, the above-mentioned computer device can be a high-performance device composed of a plurality of processors, and the above-mentioned plurality of processors can be the processors configured on the high-performance device. In addition, the above-mentioned plurality of processors can also be processors deployed on different devices, for example, the above-mentioned computer device can be a server cluster, and the above-mentioned plurality of processors can be processors on different servers in the server cluster.

[0109] Further, the present application also provides a multi-connected air conditioning system. In a multi-connected air conditioning system according to the present application, the system comprises an outdoor unit, a plurality of indoor units, and the computer device according to the above-mentioned device embodiment. Based on the computer device, the operating capacity of the end indoor unit in the multi-connected air conditioning system can be effectively improved.

[0110] Further, the present application also provides a computer readable storage medium.

[0111] In an embodiment of the computer readable storage medium according to the application, the computer readable storage medium can be configured to store a program for executing the control method of the multi-connected air conditioning system as described above, which can be loaded and run by the processor to implement the control method of the multi-connected air conditioning system as described above. For the convenience of description, only the parts related to the embodiments of the application are shown, and the specific technical details not disclosed are referred to the method part of the embodiments of the application. The computer readable storage medium can be a storage device formed by various electronic devices, and optionally, the computer readable storage medium in the embodiments of the application is a non-transitory computer readable storage medium.

[0112] So far, the technical solutions of the application have been described in combination with one embodiment shown in the drawings, but those skilled in the art can easily understand that the protection scope of the application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the application, and the technical solutions after the changes or replacements will fall within the protection scope of the application.

Claims

1. A control method of a multi VRF air conditioning system, characterized by, The multi-connected air conditioning system comprises a plurality of indoor units connected with an outdoor unit through refrigerant pipelines, and the method comprises: when the end indoor unit located at the end of the refrigerant pipeline and at least one non-end indoor unit not located at the end of the refrigerant pipeline are running, acquiring and correcting the first indoor unit temperature of the end indoor unit; acquiring the second indoor unit temperature of each non-end indoor unit running; controlling the running frequency of the compressor in the outdoor unit according to the first average temperature of the corrected first indoor unit temperature and the second indoor unit temperature; wherein the corrected first indoor unit temperature is closer to the first average temperature than the second indoor unit temperature; the control of the running frequency of the compressor in the outdoor unit comprises: when the running mode is a cooling mode, comparing the first average temperature with a preset first temperature threshold; if the first average temperature is greater than the first temperature threshold, increasing the running frequency; if the first average temperature is less than the first temperature threshold, decreasing the running frequency; and if the first average temperature is equal to the first temperature threshold, not changing the running frequency; when the running mode is a heating mode, comparing the first average temperature with a preset second temperature threshold; if the first average temperature is greater than the second temperature threshold, decreasing the running frequency; if the first average temperature is less than the second temperature threshold, increasing the running frequency; and if the first average temperature is equal to the second temperature threshold, not changing the running frequency.

2. The control method according to claim 1, characterized by, The step of "correcting the first indoor unit temperature of the end indoor unit" specifically comprises: if the running mode is a cooling mode, increasing the first indoor unit temperature; if the running mode is a heating mode, decreasing the first indoor unit temperature.

3. The control method according to claim 2, wherein the step of "increasing the first indoor unit temperature" specifically comprises: acquiring the product of a preset first correction coefficient and the first indoor unit temperature as the increased first indoor unit temperature, wherein the first correction coefficient is greater than 1 and less than or equal to a first threshold; and / or the step of "decreasing the first indoor unit temperature" specifically comprises: acquiring the product of a preset second correction coefficient and the first indoor unit temperature as the decreased first indoor unit temperature, wherein the second correction coefficient is greater than or equal to a second threshold and less than 1.

4. The control method according to claim 3, wherein the first correction coefficient is 1.5 and / or the second correction coefficient is 0.

8.

5. The control method according to claim 1, characterized by, The method further comprises, when the end indoor unit is not running or only the end indoor unit is running, acquiring the second average temperature of the third indoor unit temperature of each indoor unit running; controlling the running frequency of the compressor according to the second average temperature.

6. The control method according to claim 5, characterized by The control of the running frequency of the compressor in the outdoor unit further comprises: when the running mode is a cooling mode, comparing the second average temperature with a preset first temperature threshold; if the second average temperature is greater than the first temperature threshold, increasing the running frequency; if the second average temperature is less than the first temperature threshold, decreasing the running frequency; if the second average temperature is equal to the first temperature threshold, not changing the running frequency; comparing the second average temperature with a preset second temperature threshold when the operation mode is the heating mode; if the second average temperature is greater than the second temperature threshold, decreasing the operation frequency; if the second average temperature is less than the second temperature threshold, increasing the operation frequency; if the second average temperature is equal to the second temperature threshold, not changing the operation frequency.

7. The control method according to claim 1 or 5, further comprising obtaining the first indoor unit temperature and the second indoor unit temperature by: obtaining the temperature at a preset position of the liquid refrigerant pipe in the terminal indoor unit as the first indoor unit temperature, and obtaining the temperature at the preset position of the liquid refrigerant pipe in each non-terminal indoor unit as the second indoor unit temperature.

8. The control method according to claim 5, further comprising obtaining the third indoor unit temperature by: obtaining the temperature at a preset position of the liquid refrigerant pipe in each indoor unit as the third indoor unit temperature. A computer device comprising a processor and a storage device adapted to store a plurality of program codes, wherein the program codes are adapted to be loaded and run by the processor to execute the control method of the multi-connected air conditioning system according to any one of claims 1 to 8. The multi-connected air conditioning system comprises a plurality of indoor units connected with an outdoor unit through a refrigerant pipe, and 9. A computer device, characterized by The computer device according to claim 9.

10. A multi-split air conditioning system, characterized in that, The program codes are adapted to be loaded and run by the processor to execute the control method of the multi-connected air conditioning system according to any one of claims 1 to 8. ​ 11. A computer readable storage medium having stored therein a plurality of program codes, characterized in that, ​

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