CN113108445B - Oil return control method and device for multi-split air conditioning system - Google Patents
Oil return control method and device for multi-split air conditioning system Download PDFInfo
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 288
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000003507 refrigerant Substances 0.000 claims description 67
- 238000004364 calculation method Methods 0.000 claims description 21
- 238000004590 computer program Methods 0.000 claims description 10
- 238000009434 installation Methods 0.000 abstract description 28
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 264
- 239000007788 liquid Substances 0.000 description 18
- 230000006870 function Effects 0.000 description 7
- 239000010687 lubricating oil Substances 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 239000002199 base oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/01—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The application provides an oil return control method of a multi-split air conditioning system, which comprises the steps of obtaining pipeline information of the multi-split air conditioning system; determining the total oil return time of the multi-split air conditioning system based on the pipeline information; and carrying out oil return control on the multi-split air conditioning system according to the total oil return time. In the method, the self-adaptive adjustment control of the total oil return time of the multi-split air conditioning system is realized through the pipeline information, so that the total oil return time of the multi-split air conditioning system can be changed based on the change of the installation scene, the self-adaptive oil return time control of the multi-split air conditioning system is realized, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
Description
Technical Field
The present disclosure relates to the field of air conditioning technologies, and in particular, to an oil return control method and apparatus for a multi-split air conditioning system, an air conditioner, an electronic device, and a computer readable storage medium.
Background
At present, large-scale air conditioning systems all have oil return control mechanisms, the oil return operation time is basically fixed, and adjustment cannot be performed according to the actual installation condition of an air conditioner, so that the reliability of the air conditioning system is affected, and the refrigeration and heating effects of the air conditioning system are poor.
Therefore, how to realize the adaptive adjustment of the oil return time based on the actual installation situation of the air conditioning system is a problem to be solved at present.
Content of the application
The present application aims to solve, at least to some extent, one of the technical problems in the art described above.
Therefore, in a first aspect of the present application, an oil return control method of a multi-split air conditioning system is provided.
The second aspect of the present application proposes an oil return control device of a multi-split air conditioning system.
A third aspect of the present application provides a multi-split air conditioning system.
A fourth aspect of the present application provides an electronic device.
A fifth aspect of the present application proposes a readable storage medium.
A sixth aspect of the present application proposes a computer program product.
In order to achieve the above objective, a first aspect of the present application provides an oil return control method for a multi-split air conditioning system, including obtaining pipe information of the multi-split air conditioning system; determining the total oil return time of the multi-split air conditioning system based on the pipeline information; and carrying out oil return control on the multi-split air conditioning system according to the total oil return time.
In addition, the oil return control method of the multi-split air conditioning system provided in the first aspect of the present application may further have the following technical characteristics:
According to an embodiment of the present application, the determining the total oil return time of the multi-split air conditioning system based on the pipeline information includes: for any one pipe, acquiring the pipe length and the pipe inner diameter of the any pipe as pipe information of the any pipe; acquiring the flow rate of the refrigerant flowing through any one of the pipelines; determining oil return time of the refrigerant flowing through any pipeline based on the pipeline information of any pipeline and the refrigerant flow; the total oil return time is determined based on the oil return time of each conduit.
According to an embodiment of the present application, the determining, based on the pipe information of the any one pipe and the refrigerant flow, an oil return time of the refrigerant flowing through the any one pipe includes: determining the flowing speed of the refrigerant flowing through any pipeline according to the refrigerant flow rate and the pipeline inner diameter of any pipeline; and determining the oil return time of any pipeline based on the pipeline length and the flow speed of any pipeline.
According to an embodiment of the present application, the determining the total oil return time based on the oil return time of each pipe includes: acquiring oil return time corresponding to an inner machine pipeline of each indoor machine, and identifying the maximum oil return time from the oil return time; and adding the oil return time of the residual pipeline and the maximum oil return time to obtain the total oil return time.
According to an embodiment of the present application, the determining the total oil return time of the multi-split air conditioning system based on the pipeline information includes: acquiring the actual pipeline length of the multi-split air conditioning system as pipeline information of the multi-split air conditioning system; determining a pipeline correction coefficient of the multi-split air conditioning system according to the actual pipeline length and the standard pipeline length; and correcting the preset reference oil return time based on the pipeline correction coefficient to obtain the total oil return time.
According to an embodiment of the present application, the oil return control method of the multi-split air conditioning system further includes: acquiring the actual capacity of each indoor unit, and acquiring the actual total capacity based on the actual capacity of each indoor unit; determining an internal machine correction coefficient of the multi-split air conditioning system according to the actual total capacity and the standard total capacity; generating a target correction coefficient according to the pipeline correction coefficient and the internal machine correction coefficient; and correcting the reference oil return time based on the target correction coefficient to obtain the total oil return time.
To achieve the above object, a second aspect of the present application provides an oil return control device of a multi-split air conditioning system, including: the information module is used for acquiring pipeline information of the multi-split air conditioning system; the calculation module is used for determining the total oil return time of the multi-split air conditioning system based on the pipeline information; and the control module is used for carrying out oil return control on the multi-split air conditioning system according to the total oil return time.
In addition, the oil return control device of the multi-split air conditioning system provided in the second aspect of the present application may further have the following technical characteristics:
according to one embodiment of the application, the computing module is further configured to: for any one pipe, acquiring the pipe length and the pipe inner diameter of the any pipe as pipe information of the any pipe; acquiring the flow rate of the refrigerant flowing through any one of the pipelines; determining oil return time of the refrigerant flowing through any pipeline based on the pipeline information of any pipeline and the refrigerant flow; the total oil return time is determined based on the oil return time of each conduit.
According to one embodiment of the application, the computing module is further configured to: determining the flowing speed of the refrigerant flowing through any pipeline according to the refrigerant flow rate and the pipeline inner diameter of any pipeline; and determining the oil return time of any pipeline based on the pipeline length and the flow speed of any pipeline.
According to one embodiment of the application, the computing module is further configured to: acquiring oil return time corresponding to an inner machine pipeline of each indoor machine, and identifying the maximum oil return time from the oil return time; and adding the oil return time of the residual pipeline and the maximum oil return time to obtain the total oil return time.
According to one embodiment of the application, the computing module is further configured to: acquiring the actual pipeline length of the multi-split air conditioning system as pipeline information of the multi-split air conditioning system; determining a pipeline correction coefficient of the multi-split air conditioning system according to the actual pipeline length and the standard pipeline length; and correcting the preset reference oil return time based on the pipeline correction coefficient to obtain the total oil return time.
According to an embodiment of the present application, the oil return control device of the multi-split air conditioning system further includes: the information module is further used for obtaining the actual capacity of each indoor unit and obtaining the actual total capacity based on the actual capacity of each indoor unit; the calculation module is further used for determining an internal machine correction coefficient of the multi-split air conditioning system according to the actual total capacity and the standard total capacity; the calculation module is further used for generating a target correction coefficient according to the pipeline correction coefficient and the internal machine correction coefficient; the calculation module is further configured to correct the reference oil return time based on the target correction coefficient, so as to obtain the total oil return time.
A third aspect of the present application provides a multi-split air conditioning system, which includes the oil return control device of the multi-split air conditioning system set forth in the second aspect.
A fourth aspect of the present application proposes an electronic device comprising: at least one processor; and a memory communicatively coupled to the at least one processor; the storage stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor, so that the at least one processor can execute the oil return control method of the multi-split air conditioning system provided in the first aspect.
A fifth aspect of the present application proposes a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are configured to cause the computer to execute the oil return control method of the multi-split air conditioning system according to the first aspect.
A sixth aspect of the present application proposes a computer program product comprising a computer program which, when executed by a processor, implements the oil return control method of the multi-split air conditioning system according to the first aspect.
According to the oil return control method and device for the multi-split air conditioning system, the total oil return time of the multi-split air conditioning system is determined by acquiring the pipeline information of the multi-split air conditioning system, and the total oil return time of the multi-split air conditioning system in the current scene is adjusted based on the total oil return time. In the method, the self-adaptive adjustment control of the total oil return time of the multi-split air conditioning system is realized through the pipeline information, so that the total oil return time of the multi-split air conditioning system can be changed based on the change of an installation scene, the self-adaptive oil return time control of the multi-split air conditioning system is realized, the problem of the multi-split air conditioning system caused by inaccuracy of the oil return time is avoided, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
Additional aspects and advantages of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the application.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
fig. 1 is a flow chart of an oil return control method of a multi-split air conditioning system according to an embodiment of the present application;
fig. 2 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
fig. 3 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
fig. 4 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
fig. 5 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
fig. 6 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
fig. 7 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
fig. 8 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application;
Fig. 9 is a schematic structural diagram of an oil return control device of a multi-split air conditioning system according to an embodiment of the present disclosure;
fig. 10 is a schematic structural diagram of an oil return control device of a multi-split air conditioning system according to another embodiment of the present disclosure;
fig. 11 is a block diagram of an electronic device according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present application and are not to be construed as limiting the present application.
The oil return control method and device for the multi-split air conditioning system, the electronic equipment and the computer readable storage medium are described below with reference to the accompanying drawings.
Fig. 1 is a flow chart of an oil return control method of a multi-split air conditioning system according to an embodiment of the present application, as shown in fig. 1, the method includes:
s101, acquiring pipeline information of the multi-split air conditioning system.
In general, a multi-split air conditioning system is composed of one or more air conditioning outdoor units and a plurality of air conditioning indoor units, wherein the air conditioning outdoor units can be connected with the indoor units through configured pipelines to realize the adjustment of indoor temperature. During the operation of the compressor of the outdoor unit of the air conditioner, lubricating oil is needed to lubricate the compressor, so as to reduce the abrasion of the compressor and avoid the influence of the excessive temperature caused by friction on the performance of the compressor.
In the operation process of the air conditioning system, part of lubricating oil is discharged by the compressor and circulates in the air conditioning system along with the refrigerant, when the refrigerant is vaporized from a liquid state to a gas state, the lubricating oil is separated out from the refrigerant, and then flows back to the compressor through the operation of an oil return mechanism of the multi-split air conditioning system.
As shown in fig. 2, when the multi-split air conditioning system performs a refrigeration mechanism, the outdoor unit 21 discharges a refrigerant, wherein part of lubricating oil in the outdoor unit 21 is discharged along with the refrigerant, and reaches a plurality of indoor units 23 together with the refrigerant through the liquid pipe 22, flows through the air pipe 24 after passing through the indoor units 23, and then flows back to the outdoor unit 21, thereby completing one refrigerant cycle, and oil return of the multi-split air conditioning system can be realized by virtue of the cycle.
In the embodiment of the application, in order to realize statistics of oil return time based on the condition of the pipeline when the actual air conditioning system is installed, the pipeline information of the multi-split air conditioning system needs to be acquired. The pipe information may include a plurality of parameters such as length, inner diameter, etc. of the pipe.
Different pipeline parameter information exists in the multi-split air conditioning system under different installation scenes, such as the installation length of pipelines in the air conditioning system, the outdoor unit, the installation height of the pipelines and the like.
Further, different pipe parameter information may be obtained through different channels. For example, the inner diameter of the pipe may be obtained by obtaining a configuration parameter of the outdoor unit. For another example, the installation length of the pipeline may be obtained through a field installation log of the multi-split air conditioning system.
S102, determining the total oil return time of the multi-split air conditioning system based on the pipeline information.
In general, pipeline information such as the inner diameter of a pipeline and the installation length of the pipeline has an influence on the total oil return time of the multi-split air conditioning system. In order to realize oil return of the lubricating oil with high completion rate, the oil return time of the multi-split air conditioning system needs to be adaptively adjusted based on pipeline information.
Optionally, the total oil return time may be obtained according to configuration parameters of different pipelines of the multi-split air conditioning system. Dividing the integral pipelines of the multi-split air conditioning system according to different positions and/or different functions, and further respectively obtaining oil return time of the pipelines with different positions and/or different functions according to relevant parameters such as installation height, inner diameter and length of the pipelines. Further, the obtained oil return time of all pipelines with different positions and/or different functions is added to obtain the total oil return time of the multi-split air conditioning system.
And S103, oil return control is carried out on the multi-split air conditioning system according to the total oil return time.
The obtained total oil return time of the multi-split air conditioning system is the standard of the total oil return time of the multi-split air conditioning system, and the total oil return time is longer than the obtained total oil return time or shorter than the obtained total oil return time, so that the operation and the performance of the multi-split air conditioning system are affected to a certain extent. Further, the total oil return time of the multi-split air conditioning system needs to be adjusted based on the obtained total oil return time, so that oil return control of the multi-split air conditioning system is achieved.
In general, factory settings exist in the multi-split air conditioning system, a manufacturer can initially set basic oil return time according to basic performance of the air conditioning system, after the multi-split air conditioning system is installed, the total oil return time is obtained according to pipeline information in an installation scene, the factory settings are adjusted based on the total oil return time, and the total oil return time of the multi-split air conditioning system in the current scene is consistent with the calculated total oil return time.
Or when the installation environment of the multi-split air conditioning system changes, after the total oil return time is obtained according to the pipeline information in the new installation scene, comparing the total oil return time with the original total oil return time of the multi-split air conditioning system, and adjusting based on a comparison result, so that the total oil return time of the multi-split air conditioning system after the installation environment changes is consistent with the total oil return time obtained by calculation.
According to the oil return control method of the multi-split air conditioning system, the total oil return time of the multi-split air conditioning system is determined by acquiring the pipeline information of the multi-split air conditioning system, and the total oil return time of the multi-split air conditioning system in the current scene is adjusted based on the total oil return time. In the method, the self-adaptive adjustment control of the total oil return time of the multi-split air conditioning system is realized through the pipeline information, so that the total oil return time of the multi-split air conditioning system can be changed based on the change of an installation scene, the self-adaptive oil return time control of the multi-split air conditioning system is realized, the problem of the multi-split air conditioning system caused by inaccuracy of the oil return time is avoided, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
As a possible implementation manner, the total oil return time of the multi-split air conditioning system may be obtained by a method of fig. 3, and fig. 3 is a flow chart of an oil return control method of the multi-split air conditioning system according to another embodiment of the present application, as shown in fig. 3, where the method includes:
s301, for any one pipe, the pipe length and the pipe inner diameter of any one pipe are acquired as pipe information of any one pipe.
The pipeline equipment of the multi-split air conditioning system consists of a plurality of pipelines, and the pipelines with various specifications can be installed according to the actual installation scene and the action of each pipeline. In general, an installation log is stored in the multi-split air conditioning system, and the log includes information such as equipment parameters and installation environments of the multi-split air conditioning system.
By referring to configuration parameters of an air conditioner external unit and site installation logs of the multi-split air conditioning system, pipeline parameters of any pipeline of the multi-split air conditioning system, such as pipeline length, pipeline inner diameter and the like, can be obtained, and the obtained pipeline parameters are used as corresponding pipeline information.
S302, acquiring the refrigerant flow flowing through any pipeline.
The multi-split air conditioning system realizes the regulation and control of the indoor temperature by controlling the refrigerant flow and the refrigerant quantity entering the indoor heat exchanger. Generally, the control parameters of the multi-split air conditioning system may include a refrigeration integrated performance coefficient, a rated refrigeration capacity, an input power, a refrigerant type, and the like. When the outdoor unit of the multi-split air conditioning system leaves the factory, manufacturers can configure available refrigerant flow parameters of the outdoor unit according to relevant parameters of the outdoor unit.
When the multi-split air conditioning system operates, the refrigerant flows corresponding to different pipelines are different, and the refrigerant flow corresponding to any pipeline can be obtained by obtaining factory setting parameters of an outdoor unit in the multi-split air conditioning system.
S303, determining the oil return time of the refrigerant flowing through any pipeline based on the pipeline information of any pipeline and the refrigerant flow.
In this embodiment of the present application, for a certain pipe, the oil return time corresponding to the pipe may be obtained based on the pipe information of the pipe and the corresponding refrigerant flow. The oil return time is understood to be the running time when the air displacement of the online air conditioning system is more than or equal to the minimum air displacement of the oil return of the multi-online air conditioning system.
On the premise of ensuring the minimum displacement of oil return of the multi-split air conditioning system, the oil return time refers to the time required by the refrigerant to complete the circulation from the outdoor unit to the outdoor unit after flowing through all the pipelines.
In general, when the multi-split air conditioning system operates a refrigeration mechanism, a refrigerant is discharged from the outdoor unit, flows through the liquid pipe, passes through the indoor unit, and returns to the outdoor unit through the air pipe. When the multi-split air conditioning system runs the heating machine, the refrigerant flows to the inner machine through the air pipe and then flows through the liquid pipe to return to the outdoor machine.
Optionally, the flow velocity of the refrigerant flowing through any one of the pipes may be determined according to the refrigerant flow rate and the pipe inner diameter of any one of the pipes.
The cross-sectional area of a certain pipeline can be obtained according to the inner diameter of the pipeline, and further, the flow velocity of the refrigerant flowing through the pipeline can be calculated and obtained based on the refrigerant flow and the cross-sectional area of the pipeline.
For example, when the refrigerant flow rate is Gr, the pipe inner diameter of a certain pipe is r, and the obtained cross-sectional area calculated based on the pipe inner diameter r is sr=pi r2, the flow rate of the refrigerant in a certain pipe is vr=gr/Sr.
Further, an oil return time of any one of the pipes is determined based on the pipe length and the flow-through speed of any one of the pipes.
For a certain pipeline, the length of the pipeline can be obtained, and the oil return time corresponding to the pipeline can be obtained by combining the speed of the refrigerant flowing through the pipeline obtained by calculation.
For example, on the basis of the above example, the length Lr of a certain pipe is set, and the flow rate Fr of the obtained refrigerant in the pipe is calculated, so that the time for the refrigerant to flow through the pipe is tr=lr/Fr, which is the oil return time to which the pipe is responsive.
S304, determining the total oil return time based on the oil return time of each pipeline.
And acquiring oil return time corresponding to any pipeline in the multi-split air conditioning system. Further, the obtained oil return time corresponding to all pipelines is added, and the total oil return time of the multi-split air conditioning system can be obtained.
The oil return time of the indoor unit can be understood as the oil return time corresponding to the pipeline of the indoor unit. Optionally, the oil return time corresponding to the inner machine pipeline of each indoor machine can be obtained, and the maximum oil return time can be identified from the oil return time.
In general, a multi-split air conditioning system includes one or more outdoor units and a plurality of indoor units, where the outdoor units can be regarded as a whole when the outdoor units are plural. In order to enable the finally determined total oil return time to be applicable to all indoor units, after the oil return time corresponding to the pipelines of all the indoor units is obtained, the largest oil return time is required to be screened out and is used as the oil return time of all the indoor units in the multi-connected air conditioning system.
Further, the oil return time of the remaining pipelines and the maximum oil return time are added to obtain the total oil return time.
In this embodiment of the present application, the remaining pipes may be understood as other pipes than the indoor unit pipe among all the pipes of the multi-split air conditioning system.
And adding the determined oil return time of the indoor unit and the oil return time corresponding to other pipelines to obtain the total oil return time of the multi-split air conditioning system.
For example, in the multi-split air conditioning system, the refrigerant flow is set to be G r 。
For the oil return time of a liquid pipe of the multi-split air conditioning system, setting the length of the longest path of the liquid pipe to be L Liquid and its preparation method The pipe diameter is D Liquid and its preparation method The flow velocity of the refrigerant in the liquid pipe is V Liquid and its preparation method Wherein L is Liquid and its preparation method The calculation formula of the oil return time of the liquid pipe in the multi-split air conditioning system is as follows when the equivalent length of the liquid pipe connected with the indoor unit is included:
for the oil return time of the indoor units of the multi-split air conditioning system, screening is needed in all the oil return time of the indoor units, and the longest time is determined as the oil return time of the indoor units. Setting the length of the longest path of the inner pipeline of the indoor unit to be L Inner part The pipe diameter is D Inner part The flow velocity of the refrigerant in the inner pipeline of the indoor unit is V Inner part According to the performance of the indoor unit, the refrigerant flow corresponding to the pipeline in the indoor unit is setSet as G r ' the oil return time of the internal unit in the multi-split air conditioning system is as follows:
aiming at the oil return time of the air pipe of the multi-split air conditioning system, the length of the longest path of the air pipe is set to be L Air flow The pipe diameter is D Air flow The flow velocity of the refrigerant in the air pipe is V Air flow The oil return time of the liquid pipe in the multi-split air conditioning system is calculated as follows:
further, the obtained oil return time t of the liquid pipe 1 Oil return time t of indoor unit 2 Oil return time t of air pipe 3 Adding to obtain the total oil return time of the multi-split air conditioning system:
t＝t 1 +t 2 +t 3
for a better understanding of the above embodiment, as shown in fig. 4, it includes:
s401, acquiring the pipeline length, the pipeline inner diameter and the indoor unit information of the multi-split air conditioning system.
S402, calculating oil return time t of the liquid pipe 1 。
S403, calculating the oil return time t of the indoor unit 2 。
S404, calculating oil return time t of the air pipe 3 。
S405, adding the oil return time of the liquid pipe, the indoor unit and the air pipe to obtain the total oil return time t=t of the multi-split air conditioning system 1 +t 2 +t 3 。
In the embodiment of the application, pipelines of the multi-split air conditioning system are divided into three parts including a liquid pipe, an indoor unit and an air pipe according to different functions, oil return time of the pipelines is calculated for each part independently, and then the oil return time of each part is added, so that the total oil return time of the multi-split air conditioning system is obtained.
According to the oil return control method of the multi-split air conditioning system, all pipelines of the multi-split air conditioning system are divided, the corresponding oil return time is obtained based on the inner diameter of any pipeline and the refrigerant flow, and further, the oil return time of all the pipelines is summed to obtain the total oil return time of the multi-split air conditioning system. In the method, the total oil return time of the multi-split air conditioning system can be obtained based on the pipeline information, so that the self-adaptive oil return time control of the multi-split air conditioning system is realized, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
As another possible implementation manner, the total oil return time of the multi-split air conditioning system may be obtained by a method of fig. 5, and fig. 5 is a flow chart of an oil return control method of the multi-split air conditioning system according to another embodiment of the present application, as shown in fig. 5, where the method includes:
s501, acquiring the actual pipeline length of the multi-split air conditioning system as the pipeline information of the multi-split air conditioning system.
The pipeline correction coefficient of the multi-split air conditioning system can be obtained according to the pipeline information, and the total oil return time of the multi-split air conditioning system is obtained based on the coefficient.
According to the factory configuration information and the installation information of the multi-split air conditioning system, the actual pipeline length of the multi-split air conditioning system can be obtained, for example, the pipeline length which is installed in the multi-split air conditioning system when the factory is finished can be obtained through the factory configuration information, and for example, the pipeline length of the pipeline connected between the outdoor unit and the indoor unit of the multi-split air conditioning system in the actual installation process can be obtained from the field installation information of the multi-split air conditioning system.
Further, the lengths of the pipelines obtained by the channels are added to obtain the actual pipeline lengths of all the pipelines of the multi-split air conditioning system, and the actual pipeline lengths are used as pipeline information.
S502, determining a pipeline correction coefficient of the multi-split air conditioning system according to the actual pipeline length and the standard pipeline length.
The pipeline of the standard length unit of the multi-split air conditioning system can be set, the pipeline of the standard length unit is used as a standard pipeline, and further, pipeline parameters corresponding to the standard length pipeline are used as reference parameters. The ratio of the actual pipeline length to the standard pipeline length can be used for obtaining the proportional relation of various parameters between the actual pipeline length and the standard pipeline length, and the proportional relation is the pipeline correction coefficient of the multi-split air conditioning system.
For example, length L of standard length pipeline is set a Length L of actual length pipe of 1m b If the length is 3m, the pipe correction coefficient θ obtained based on the actual pipe length and the standard pipe length may be:
and S503, correcting the preset reference oil return time based on the pipeline correction coefficient to obtain the total oil return time.
The pipeline correction coefficient can embody the proportional relation between parameters corresponding to pipelines with different lengths and parameters corresponding to pipelines with standard lengths in the multi-split air conditioning system. After the pipeline correction coefficient is obtained, the oil return time of the actual length pipeline in the actual installation scene can be obtained based on the oil return time in the corresponding parameters of the standard length pipeline.
For example, still taking the above example as an example, a standard pipe length L is set a 1m, the oil return time is t a Actual pipe length L b When the pipeline correction coefficient is 3m and θ, the oil return time t of the pipeline with the actual length in the actual installation scene b The method comprises the following steps:
further, when the actual pipeline length is the whole pipeline length of the multi-split air conditioning system, the total oil return time of the multi-split air conditioning system can be obtained based on the pipeline correction coefficient.
As can be further appreciated in connection with fig. 6, as shown in fig. 6, includes:
s601, acquiring the actual pipeline length of the multi-split air conditioning system.
S602, calculating a pipeline correction coefficient.
S603, acquiring the total oil return time of the multi-split air conditioning system.
In the embodiment of the application, the proportional relation between the total oil return time of the multi-split air conditioning system and the oil return time of the standard-length pipeline is obtained by calculating the pipeline correction coefficient, so that the total oil return time is determined.
As another possible implementation manner, the internal machine correction coefficient of the multi-split air conditioning system may be obtained according to the capacity of the indoor machine, and meanwhile, the pipe correction coefficient of the multi-split air conditioning system may be obtained according to the actual pipe length and the standard pipe length of the rest pipes outside the indoor machine, and further, the oil return time may be obtained by combining the internal machine correction coefficient and the pipe correction coefficient.
As shown in fig. 7, fig. 7 is a flow chart of an oil return control method of a multi-split air conditioning system according to another embodiment of the present application, where the method includes:
s701, acquiring the actual capacity of each indoor unit, and obtaining the actual total capacity based on the actual capacity of each indoor unit.
In general, the multi-split air conditioning system includes a plurality of indoor units, and the actual capacity of the indoor units can be obtained by referring to factory settings configured by a manufacturer for the indoor units based on performance settings of the indoor units.
Further, according to the indoor unit model selected in the actual installation scene, the actual capacity of each indoor unit is obtained, and the obtained capacities of the plurality of indoor units are added together, so that the actual total capacity of the indoor units can be obtained.
S702, determining an internal machine correction coefficient of the multi-split air conditioning system according to the actual total capacity and the standard total capacity.
The indoor unit total capacity of the multi-split air conditioning system can be set as a standard total capacity, the indoor unit parameter corresponding to the standard total capacity is used as a reference parameter, and the proportional relation between the actual total capacity of the indoor unit and the standard total capacity is obtained through the ratio of the actual total capacity to the standard total capacity, and is the indoor unit correction coefficient of the multi-split air conditioning system.
For example, the standard total capacity V of the indoor unit is set a 30kw, the total capacity V of the actual indoor unit b For 69kw, the internal unit correction coefficient δ of the multi-split air conditioning system obtained based on the actual total capacity and the standard total capacity of the indoor unit may be:
s703, generating a target correction coefficient according to the pipeline correction coefficient and the internal machine correction coefficient.
The pipeline correction coefficient can represent the proportional relation between each parameter of the pipeline installed under the actual condition and each parameter of the pipeline with the standard length, and the internal unit correction coefficient can represent the proportional relation between each parameter of the indoor unit with the total capacity of the actual internal unit and each parameter of the indoor unit with the total capacity of the standard internal unit.
Based on the pipeline correction coefficient and the internal machine correction coefficient, a target correction coefficient for adjusting the total oil return time can be obtained, and further adjustment of the total oil return time of the multi-split air conditioning system is achieved.
Setting the pipeline correction coefficient as theta and the internal machine correction coefficient as delta, and acquiring the target correction coefficient x based on the pipeline correction coefficient and the internal machine correction coefficient as delta:
x＝f (θ) ＝θ 0 ×w i +(1-w i )
wherein w is i E (0, 1), when the multi-split air conditioning system is installed in standard, theta 0 =1, θ=1 can be obtained. Further, w is set based on the above formula i =0.5, θ=2, then the target correction coefficient x is:
x＝2×0.5+0.5＝1.5
and S704, correcting the reference oil return time based on the target correction coefficient to obtain the total oil return time.
According to the oil return time of the standard pipeline length and the oil return time corresponding to the standard capacity of the indoor unit, the set reference oil return time of the multi-split air conditioning system can be obtained, and the reference oil return time is corrected based on the obtained target correction coefficient, so that the total oil return time of the multi-split air conditioning system is obtained.
For example, based on the above example, the base oil return time is set to t 0 And if the target correction coefficient is x=1.5, the total oil return time t of the multi-split air conditioning system is as follows:
t＝x×t 0 ＝1.5t 0
further, as can be further understood in conjunction with fig. 8, as shown in fig. 8, includes:
s801, obtaining the actual pipeline length of the multi-split air conditioning system and the actual total indoor unit capacity of the indoor unit.
S802, acquiring a pipeline correction coefficient theta.
S803, acquiring an internal machine correction coefficient delta.
S804, acquiring a target correction coefficient x.
S805, correcting the basic oil return time based on the target correction coefficient to obtain the total oil return time t of the total oil return time system of the multi-split air conditioning system as t=x×t 0 。
The method comprises the steps of respectively obtaining an internal machine correction coefficient and pipeline correction coefficients of other pipelines through calculation, obtaining an integral target correction coefficient of the multi-split air conditioning system based on the internal machine correction coefficient and the pipeline correction coefficient of other pipelines, reflecting a proportional relation between the total oil return time of the multi-split air conditioning system and a preset basic oil return time, and adjusting and correcting the basic oil return time through the target correction coefficient so as to obtain the total oil return time of the multi-split air conditioning system.
It should be noted that, the flow rate of the refrigerant flow is determined based on the operation frequency of the multi-split air conditioning system, and the circulation time of the refrigerant can be determined by the refrigerant flow rate and the length of the pipeline, so as to influence the oil return time of the multi-split air conditioning system. The self-adaptive oil return time calculation of the multi-split air conditioning system can be realized through the pipeline correction coefficient and/or the internal machine correction coefficient acquired by the pipeline length and/or the internal machine capacity of the multi-split air conditioning system in an actual scene.
According to the oil return control method of the multi-split air conditioning system, optionally, the pipeline correction coefficient can be obtained, and the total oil return time of the pipeline with the actual length can be obtained based on the pipeline correction coefficient. Optionally, the pipeline correction coefficient and the internal machine correction coefficient can be obtained, the target correction coefficient is obtained based on the pipeline correction coefficient and the internal machine correction coefficient, and the basic oil return time is adjusted based on the target correction coefficient, so that the total oil return time of the multi-split air conditioning system is obtained. The self-adaptive oil return time control of the multi-split air conditioning system is realized, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
Corresponding to the oil return control method of the multi-split air conditioning system provided by the above embodiments, an embodiment of the present application further provides an oil return control device of the multi-split air conditioning system, and because the oil return control device of the multi-split air conditioning system provided by the embodiment of the present application corresponds to the oil return control method of the multi-split air conditioning system provided by the above embodiments, implementation manners of the oil return control method of the multi-split air conditioning system are also applicable to the oil return control device of the multi-split air conditioning system provided by the embodiment of the present application, and will not be described in detail in the following embodiments.
Fig. 9 is an oil return control device of a multi-split air conditioning system according to an embodiment of the present application, as shown in fig. 9, the oil return control device 100 of the multi-split air conditioning system includes an information module 11, a calculation module 12, and a control module 13, where:
the information module 11 is used for acquiring pipeline information of the multi-split air conditioning system;
a calculation module 12, configured to determine a total oil return time of the multi-split air conditioning system based on the pipeline information;
and the control module 13 is used for carrying out oil return control on the multi-split air conditioning system according to the total oil return time.
Fig. 10 is an oil return control device of a multi-split air conditioning system according to another embodiment of the present application, as shown in fig. 10, the oil return control device 200 of the multi-split air conditioning system includes an information module 21, a calculation module 22, and a control module 23, where:
The information module 11, the calculation module 12, and the control module 13 have the same structure and function as the information module 21, the calculation module 22, and the control module 23.
In the embodiment of the present application, the calculating module 22 is further configured to: for any one of the pipelines, acquiring the pipeline length and the pipeline inner diameter of any one of the pipelines as pipeline information of any one of the pipelines; acquiring the flow of the refrigerant flowing through any pipeline; determining oil return time of the refrigerant flowing through any pipeline based on pipeline information of any pipeline and refrigerant flow; the total oil return time is determined based on the oil return time of each conduit.
In the embodiment of the present application, the calculating module 22 is further configured to: determining the flowing speed of the refrigerant flowing through any pipeline according to the refrigerant flow rate and the pipeline inner diameter of any pipeline; the oil return time of any one of the pipes is determined based on the pipe length and the flow rate of any one of the pipes.
In the embodiment of the present application, the calculating module 22 is further configured to: acquiring oil return time corresponding to an inner machine pipeline of each indoor machine, and identifying the maximum oil return time from the oil return time; and adding the oil return time of the residual pipeline and the maximum oil return time to obtain the total oil return time.
In the embodiment of the present application, the calculating module 22 is further configured to: acquiring the actual pipeline length of the multi-split air conditioning system as pipeline information of the multi-split air conditioning system; determining a pipeline correction coefficient of the multi-split air conditioning system according to the actual pipeline length and the standard pipeline length; and correcting the preset reference oil return time based on the pipeline correction coefficient to obtain the total oil return time.
In this embodiment of the present application, the information module 21 is further configured to obtain an actual capacity of each indoor unit, and obtain an actual total capacity based on the actual capacity of each indoor unit;
in this embodiment, the calculation module 22 is further configured to determine an internal machine correction coefficient of the multi-online air conditioning system according to the actual total capacity and the standard total capacity;
in this embodiment, the calculation module 22 is further configured to generate a target correction coefficient according to the pipeline correction coefficient and the internal machine correction coefficient;
in this embodiment, the calculation module 22 is further configured to correct the reference oil return time based on the target correction coefficient, so as to obtain the total oil return time.
According to the oil return control device of the multi-split air conditioning system, the total oil return time of the multi-split air conditioning system is determined by acquiring the pipeline information of the multi-split air conditioning system, and the total oil return time of the multi-split air conditioning system in the current scene is adjusted based on the total oil return time. In the method, the self-adaptive adjustment control of the total oil return time of the multi-split air conditioning system is realized through the pipeline information, so that the total oil return time of the multi-split air conditioning system can be changed based on the change of an installation scene, the self-adaptive oil return time control of the multi-split air conditioning system is realized, the problem of the multi-split air conditioning system caused by inaccuracy of the oil return time is avoided, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
The application also provides a multi-split air conditioning system, which can realize the oil return control function of the multi-split air conditioning system provided in the embodiment.
To achieve the above embodiments, the present application also proposes an electronic device, a computer-readable storage medium and a computer program product.
Fig. 11 illustrates a schematic block diagram of an example electronic device 1100 that can be used to implement embodiments of the present application. The electronic device 1100 includes a memory 111, a processor 112. The processor 112 executes a program corresponding to the executable program code by reading the executable program code stored in the memory 111, so as to implement the oil return control method of the multi-split air conditioning system.
According to the electronic device, the processor 112 executes the computer program stored in the memory 111, the pipeline information of the multi-split air conditioning system is obtained, the total oil return time of the multi-split air conditioning system is determined, and the total oil return time of the multi-split air conditioning system in the current scene is adjusted based on the total oil return time. In the method, the self-adaptive adjustment control of the total oil return time of the multi-split air conditioning system is realized through the pipeline information, so that the total oil return time of the multi-split air conditioning system can be changed based on the change of an installation scene, the self-adaptive oil return time control of the multi-split air conditioning system is realized, the problem of the multi-split air conditioning system caused by inaccuracy of the oil return time is avoided, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
The embodiment of the application also provides a computer readable storage medium which stores a computer program, and the program realizes the oil return control method of the multi-split air conditioning system when being executed by a processor.
The computer readable storage medium of the embodiment of the application is used for determining the total oil return time of the multi-split air conditioning system by storing a computer program and executing the computer program by a processor and acquiring pipeline information of the multi-split air conditioning system, and adjusting the total oil return time of the multi-split air conditioning system in the current scene based on the total oil return time. In the method, the self-adaptive adjustment control of the total oil return time of the multi-split air conditioning system is realized through the pipeline information, so that the total oil return time of the multi-split air conditioning system can be changed based on the change of an installation scene, the self-adaptive oil return time control of the multi-split air conditioning system is realized, the problem of the multi-split air conditioning system caused by inaccuracy of the oil return time is avoided, the reliability risk degree of the multi-split air conditioning system is reduced, the use experience of a user of the multi-split air conditioning system is ensured, and the energy consumption of the multi-split air conditioning system is reduced.
In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.
In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Although embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (12)
1. The oil return control method of the multi-split air conditioning system is characterized by comprising the following steps of:
Acquiring pipeline information of a multi-split air conditioning system;
determining the total oil return time of the multi-split air conditioning system based on the pipeline information;
oil return control is carried out on the multi-split air conditioning system according to the total oil return time;
the determining the total oil return time of the multi-split air conditioning system based on the pipeline information comprises the following steps:
acquiring the actual pipeline length of the multi-split air conditioning system as pipeline information of the multi-split air conditioning system;
determining a pipeline correction coefficient of the multi-split air conditioning system according to the actual pipeline length and the standard pipeline length;
correcting the preset reference oil return time based on the pipeline correction coefficient to obtain the total oil return time;
acquiring the actual capacity of each indoor unit, and acquiring the actual total capacity based on the actual capacity of each indoor unit;
determining an internal machine correction coefficient of the multi-split air conditioning system according to the actual total capacity and the standard total capacity;
generating a target correction coefficient according to the pipeline correction coefficient and the internal machine correction coefficient;
correcting the reference oil return time based on the target correction coefficient to obtain the total oil return time;
Wherein the target correction coefficient is expressed by the following formula:
wherein θ is the pipe correction coefficient,
，
and correcting the coefficient for the target.
2. The method of claim 1, wherein the determining the total oil return time of the multi-split air conditioning system based on the duct information comprises:
for any one pipe, acquiring the pipe length and the pipe inner diameter of the any pipe as pipe information of the any pipe;
acquiring the flow rate of the refrigerant flowing through any one of the pipelines;
determining oil return time of the refrigerant flowing through any pipeline based on the pipeline information of any pipeline and the refrigerant flow;
the total oil return time is determined based on the oil return time of each conduit.
3. The method for controlling oil return of a multi-split air conditioning system according to claim 2, wherein determining the oil return time for the refrigerant flowing through any one of the pipes based on the pipe information of the any one of the pipes and the refrigerant flow rate includes:
determining the flowing speed of the refrigerant flowing through any pipeline according to the refrigerant flow rate and the pipeline inner diameter of any pipeline;
and determining the oil return time of any pipeline based on the pipeline length and the flow speed of any pipeline.
4. The oil return control method of the multi-split air conditioning system according to claim 2 or 3, wherein the determining the total oil return time based on the oil return time of each pipe includes:
acquiring oil return time corresponding to an inner machine pipeline of each indoor machine, and identifying the maximum oil return time from the oil return time;
and adding the oil return time of the residual pipeline and the maximum oil return time to obtain the total oil return time.
5. An oil return control device of a multi-split air conditioning system is characterized by comprising:
the information module is used for acquiring pipeline information of the multi-split air conditioning system;
the calculation module is used for determining the total oil return time of the multi-split air conditioning system based on the pipeline information;
the control module is used for carrying out oil return control on the multi-split air conditioning system according to the total oil return time;
the computing module is further configured to:
acquiring the actual pipeline length of the multi-split air conditioning system as pipeline information of the multi-split air conditioning system;
determining a pipeline correction coefficient of the multi-split air conditioning system according to the actual pipeline length and the standard pipeline length;
correcting the preset reference oil return time based on the pipeline correction coefficient to obtain the total oil return time;
The information module is further used for obtaining the actual capacity of each indoor unit and obtaining the actual total capacity based on the actual capacity of each indoor unit;
the calculation module is further used for determining an internal machine correction coefficient of the multi-split air conditioning system according to the actual total capacity and the standard total capacity;
the calculation module is further used for generating a target correction coefficient according to the pipeline correction coefficient and the internal machine correction coefficient;
the calculation module is further configured to correct the reference oil return time based on the target correction coefficient, so as to obtain the total oil return time;
wherein the target correction coefficient is expressed by the following formula:
wherein θ is the pipe correction coefficient,
，
and correcting the coefficient for the target.
6. The oil return control device of the multi-split air conditioning system according to claim 5, wherein the computing module is further configured to:
for any one pipe, acquiring the pipe length and the pipe inner diameter of the any pipe as pipe information of the any pipe;
acquiring the flow rate of the refrigerant flowing through any one of the pipelines;
determining oil return time of the refrigerant flowing through any pipeline based on the pipeline information of any pipeline and the refrigerant flow;
The total oil return time is determined based on the oil return time of each conduit.
7. The oil return control device of the multi-split air conditioning system according to claim 6, wherein the computing module is further configured to:
determining the flowing speed of the refrigerant flowing through any pipeline according to the refrigerant flow rate and the pipeline inner diameter of any pipeline;
and determining the oil return time of any pipeline based on the pipeline length and the flow speed of any pipeline.
8. The oil return control device of the multi-split air conditioning system according to claim 5 or 6, wherein the computing module is further configured to:
acquiring oil return time corresponding to an inner machine pipeline of each indoor machine, and identifying the maximum oil return time from the oil return time;
and adding the oil return time of the residual pipeline and the maximum oil return time to obtain the total oil return time.
9. A multi-split air conditioning system, comprising: the oil return control device of the multi-split air conditioning system according to any one of claims 5 to 8.
10. An electronic device, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein,,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the oil return control method of the multi-split air conditioning system of any one of claims 1-4.
11. A non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the oil return control method of the multi-split air conditioning system according to any one of claims 1 to 4.
12. A computer program product comprising a computer program which, when executed by a processor, implements the oil return control method of a multi-split air conditioning system according to any one of claims 1-4.
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| CN109855229A (en) * | 2019-03-01 | 2019-06-07 | 珠海格力电器股份有限公司 | Oil return control method for segmented oil return and multi-split system |
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