CN114110999A - Method and device for controlling opening degree of internal machine of multi-connected unit, electronic equipment and storage medium - Google Patents
Method and device for controlling opening degree of internal machine of multi-connected unit, electronic equipment and storage medium Download PDFInfo
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- 238000004891 communication Methods 0.000 claims description 19
- 238000004590 computer program Methods 0.000 claims description 11
- 230000000875 corresponding effect Effects 0.000 claims description 7
- 230000002596 correlated effect Effects 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 32
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 11
- 239000003507 refrigerant Substances 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 238000004364 calculation method 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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
Abstract
The application relates to a method and a device for controlling the opening degree of an indoor unit of a multi-connected unit, electronic equipment and a storage medium, and belongs to the technical field of air conditioners. The method for controlling the opening degree of the multi-connected unit indoor unit comprises the following steps: obtaining the rated capacity of an internal machine to be started; obtaining the rated capacity of the started internal machine; acquiring the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine; and controlling the internal machine to be started according to the initial opening degree of the internal machine to be started. The initial opening degree of the internal machine to be started is obtained through the rated capacity of the internal machine to be started and the rated capacity of the internal machine which is started, the initial opening degree of the internal machine to be started can be accurately controlled when the number of the internal machines of the multi-connected unit is increased, the technical problem that liquid returns are generated when the number of the internal machines of the multi-connected unit is increased is effectively solved, the compressor is protected, the fault rate of the compressor is reduced, and the service life of the compressor is prolonged.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a method and a device for controlling the opening degree of an indoor unit of a multi-connected unit, electronic equipment and a storage medium.
Background
In the operation process of the multi-split air conditioner, when the number of the internal machine platforms is increased, the flow rate of a system refrigerant is increased, and the process may cause the problem of liquid return of the system. On one hand, the liquid refrigerant returns to the steam component to dilute the concentration of lubricating oil in the steam component, so that the oil returning to the compressor is reduced; in addition, a part of liquid refrigerant returns to the compressor to cause liquid slugging, the liquid refrigerant is rapidly evaporated in the compressor, and a part of lubricating oil is taken away, so that the compressor is lack of oil, and faults are caused.
In the prior art, the liquid carrying amount of the compressor is generally controlled by the combined action of the frequency of the compressor, the suction superheat degree, the exhaust superheat degree and the like, so as to reduce the possibility of liquid impact of the compressor and damage to the compressor caused by oil shortage. However, the adjustment speed of the suction superheat and the exhaust superheat is limited, and there is a possibility that the system returns when the load is suddenly changed.
Disclosure of Invention
In order to solve the technical problem that liquid return is generated when the number of the multi-connected unit indoor units is increased, the application provides a method and a device for controlling the opening degree of the multi-connected unit indoor units, electronic equipment and a storage medium.
In a first aspect, the application provides a method for controlling opening of an indoor unit of a multi-connected unit, including:
obtaining the rated capacity of an internal machine to be started;
obtaining the rated capacity of the started internal machine;
acquiring the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
controlling the internal machine to be started according to the initial opening degree of the internal machine to be started;
further, the obtaining of the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine includes:
acquiring the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started;
acquiring an opening degree control coefficient of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
acquiring the initial opening degree of the internal machine to be started according to the basic opening degree of the internal machine to be started and the opening degree control coefficient of the internal machine to be started;
further, the basic opening degree of the internal machine to be started is positively correlated with the rated capacity of the internal machine to be started;
further, the obtaining of the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started includes:
acquiring the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and a preset first mapping relation; the first mapping relation is a mapping relation between the rated capacity of the internal machine to be started and the basic opening of the internal machine to be started;
further, the obtaining of the opening degree control coefficient of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine includes:
obtaining the capacity ratio; the capacity ratio is the ratio of the rated capacity of the internal machine to be started to the rated capacity of the started internal machine;
acquiring an opening control coefficient of the internal machine to be started according to the capacity ratio and a preset second mapping relation; the second mapping relation is a mapping relation between the capacity ratio and an opening degree control coefficient of the internal machine to be started;
further, the opening degree control coefficient of the internal machine to be started is inversely related to the capacity ratio;
further, the number of the internal machines to be started is at least one, and the number of the started internal machines is at least one;
the capacity ratio is the ratio of the sum of the rated capacities of all the internal machines to be started to the sum of the rated capacities of all the started internal machines;
further, the acquiring rated capacity of the internal unit to be started includes:
acquiring the running mode of an internal machine to be started;
acquiring the rated capacity of the internal machine to be started according to the running mode of the internal machine to be started;
further, the obtaining of the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and a preset first mapping relation includes:
acquiring the first mapping relation corresponding to the operation mode of the internal machine to be started;
and obtaining the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started, the operation mode of the internal machine to be started and the first mapping relation.
In a second aspect, the present application provides a multi-connected unit indoor unit opening degree control device, including:
the first acquisition module is used for acquiring the rated capacity of the internal unit to be started;
the second acquisition module is used for acquiring the rated capacity of the started internal machine;
the third obtaining module is used for obtaining the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
and the control module is used for controlling the internal machine to be started according to the initial opening degree of the internal machine to be started.
In a third aspect, the present application provides an electronic device, including a processor, a communication interface, a memory, and a communication bus, where the processor, the communication interface, and the memory complete mutual communication through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the steps of the method for controlling the opening degree of the multi-connected unit indoor unit according to any one embodiment of the first aspect when executing the program stored in the memory.
In a fourth aspect, the present application provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for controlling the opening degree of multiple indoor units according to any one of the embodiments of the first aspect.
Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:
the method provided by the embodiment of the application obtains the rated capacity of the internal machine to be started, obtains the rated capacity of the started internal machine, obtains the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine, and controls the internal machine to be started according to the initial opening degree of the internal machine to be started. The initial opening degree of the internal machine to be started is obtained through the rated capacity of the internal machine to be started and the rated capacity of the internal machine already started, the initial opening degree of the internal machine to be started can be accurately controlled when the number of the internal machines of the multi-connected unit is increased, the technical problem that liquid returns are generated when the number of the internal machines of the multi-connected unit is increased is effectively solved, and the technical effect of protecting the compressor is achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a system architecture diagram of a multi-connected unit according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a method for controlling the opening degree of an internal machine of a multi-connected unit according to an embodiment of the present application;
fig. 3 is a schematic flow chart of another method for controlling the opening degree of the multiple on-line unit indoor unit according to the embodiment of the present application;
fig. 4 is a schematic flow chart of another method for controlling the opening degree of the multiple on-line unit indoor unit according to the embodiment of the present application;
fig. 5 is a schematic structural diagram of an opening degree control device of a multi-connected unit indoor unit provided in an embodiment of the present application;
fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.
The reference numbers are as follows:
1-a compressor; 2-a four-way valve; 3-an outdoor heat exchanger; 4-an external fan; 5-main electronic expansion valve; 6-a first stop valve; 9-a second stop valve; 71. 72, 73 … 7 n-internal machine electronic expansion valve; 81. 82, 83 … 8 n-indoor machine heat exchangers; 10-a vapor-liquid separator; 11-air-breathing temperature sensing bulb; 12-high pressure sensor.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
A first embodiment of the present application provides a method for controlling an opening degree of an internal machine of a multi-connected unit, where the method may be applied to a system architecture as shown in fig. 1, where the system architecture at least includes an internal machine 1 and an internal machine 2, and may control an initial opening degree of an internal machine to be started up when the number of started internal machines is increased.
The system architecture, taking refrigeration as an example, the system cycle process is as follows:
the internal machine is completely shut down in the initial state, if only the internal machine 1 is started during starting, when the system is in refrigerating operation, low-temperature and low-pressure gas enters a suction port of the compressor 1 from an outlet of the gas-liquid separator 10, is compressed into high-temperature and high-pressure gas in the compressor 1, enters the outdoor heat exchanger 3 through the four-way valve 2, condenses the high-temperature superheated gas into high-temperature and high-pressure liquid, passes through the main electronic expansion valve 5 (an outdoor electronic expansion valve), passes through the first stop valve 6, and reaches the internal machine electronic expansion valve 71 through a connecting pipeline for throttling, and because the compressor is started to operate, the initial target opening degree of the internal machine electronic expansion valve 71 of the internal machine 1 is a. The throttled vapor-liquid two-phase refrigerant enters the inner machine heat exchanger 81 for heat exchange, passes through the second stop valve 9 through the connecting pipeline, enters the four-way valve 2, then enters the vapor-liquid separator 10, and low-temperature and low-pressure gas from the gas separator 10 enters the suction port of the compressor 1 through the gas suction pipe to complete a refrigeration cycle. The air suction temperature sensing bulb 11 and the high-pressure sensor 12 are used for monitoring the operation parameters of the system, and the external fan 4 is matched with the outdoor heat exchanger 3 to work.
The compressor is in a start-up stage, which may be a stage before a system is started up to a system stable operation stage. Before the compressor is started to operate, the internal machines in the system are in a shutdown state, and when any one of the internal machines is started, the compressor is started to operate. In order to avoid the liquid return when the first internal machine is started, the initial opening degree of all the internal machines can be set to be a smaller value than that in normal operation, for example, the initial opening degree is set to be a.
The method for controlling the opening degree of the multi-connected unit indoor unit, as shown in fig. 2, comprises the following steps:
And step 203, acquiring the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine.
And step 204, controlling the internal machine to be started according to the initial opening degree of the internal machine to be started.
The initial opening degree of the internal machine to be started is obtained according to the rated capacity of the internal machine to be started and the rated capacity of the internal machine already started, the technical problem that liquid returns are generated when the number of the internal machines to be started of the multi-connected unit is increased can be effectively solved by accurately controlling the initial opening degree of the internal machines to be started when the number of the internal machines to be started of the multi-connected unit is increased, the technical effect of protecting the compressor is achieved, the fault rate of the compressor is reduced, and the service life of the compressor is prolonged.
In an embodiment, obtaining an initial opening degree of the internal machine to be started according to a rated capacity of the internal machine to be started and a rated capacity of the internal machine already started, as shown in fig. 3, includes:
And step 303, acquiring an initial opening degree of the internal machine to be started according to the basic opening degree of the internal machine to be started and the opening degree control coefficient of the internal machine to be started.
In this embodiment, the basic opening degree of the internal machine to be started is obtained according to the rated capacity of the internal machine to be started, and different rated capacities can correspond to different basic opening degrees. And acquiring an opening degree control coefficient of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine. According to the basic opening degree of the internal machine to be started and the opening degree control coefficient of the internal machine to be started, the obtained initial opening degree of the internal machine to be started is more accurate. The internal machine to be started is controlled through the accurate initial opening degree of the internal machine to be started, and the technical problem that liquid returns are generated when the number of the internal machines to be started of the multi-connected unit is increased can be effectively solved.
In one embodiment, when the number of the internal machines to be started is greater than the preset number, the initial opening control process described in steps 201 to 204 or the process of obtaining the initial opening described in steps 301 to 303 is started, or conversely, when the number of the internal products to be started is not greater than the preset number, the control is performed according to the existing opening control process. The preset number can be the maximum value of the number of the internal machines which are obtained through experimental statistics, are started simultaneously and cannot generate liquid return. The preset number is a positive integer greater than 1. Of course, regardless of the number of the internal machines to be started, the initial opening degree control flow of the internal machines to be started described in step 201 to step 204 or the process of obtaining the initial opening degree described in step 301 to step 303 may be executed.
In one embodiment, the basic opening degree of the internal machine to be started is positively correlated with the rated capacity of the internal machine to be started. The larger the rated capacity of the internal machine to be started is, the larger the basic opening degree of the internal machine to be started is, and the smaller the rated capacity of the internal machine to be started is, the smaller the basic opening degree of the internal machine to be started is. The rated capacity can be rated power, the larger the rated power of the internal machine to be started is, the more refrigerants are needed under general conditions, therefore, the larger the basic opening of the internal machine to be started can be set, the smaller the rated power of the internal machine to be started is, the smaller the basic opening can be set, and thus, the problem of liquid return when the number of the internal machines to be started is increased can be avoided, and the working effect of the internal machine to be started when the internal machine is started can be ensured.
In one embodiment, obtaining a basic opening degree of an internal machine to be started according to a rated capacity of the internal machine to be started includes: and obtaining the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and a preset first mapping relation.
The first mapping relationship is a mapping relationship between a rated capacity of an internal machine to be started and a basic opening degree of the internal machine to be started, for example, the first mapping relationship may be as shown in table 1, where different internal machine rated capacity sections correspond to different basic opening degrees, if the rated capacity belongs to an interval (0, 4.5), the basic opening degree is b, the rated capacity belongs to an interval (5.5, 10), the basic opening degree is d, the rated capacity and the basic opening degree are positively correlated, that is, b is greater than c is greater than d is less than e, an initial opening degree is equal to the basic opening degree and is equal to an opening degree control coefficient k, where k may be a fixed value, that is, the basic opening degree is used alone to obtain the initial opening degree, and the internal machine to be started may also be better controlled.
The method comprises the following steps of obtaining the basic opening of the internal machine to be started according to the rated capacity of the internal machine to be started, and the method also comprises the following steps: and acquiring a first mapping relation.
Before the rated capacity of the internal unit to be started is obtained, the method for controlling the opening degree of the internal unit of the multi-connected unit further comprises the following steps: and determining that the compressor is started, and if the compressor is not started, setting the initial opening of all the internal machines to be a preset value a.
When the compressor is started (i.e., when the internal machines are not started before), the initial opening degrees of all the internal machines are all set to be a, specifically, a may be set to be smaller than b. The problem of liquid return of the first startup internal machine during startup of the system can be avoided.
TABLE 1
In one embodiment, obtaining an opening degree control coefficient of an internal machine to be started according to a rated capacity of the internal machine to be started and a rated capacity of the internal machine already started includes: obtaining the capacity ratio; and the capacity ratio is the ratio of the rated capacity of the internal machine to be started to the rated capacity of the started internal machine, and the opening degree control coefficient of the internal machine to be started is obtained according to the capacity ratio and a preset second mapping relation.
The second mapping relationship is a mapping relationship between the capability ratio and the opening degree control coefficient of the internal machine to be started, for example, the second mapping relationship may be as shown in table 2, where different capability ratios correspond to different starting control coefficients. The ratio of the newly started internal unit to the operating internal unit is the ratio of the rated capacity of the internal unit to be started to the rated capacity of the internal unit to be started.
In one embodiment, the opening degree control coefficient of the internal machine to be started is inversely related to the capacity ratio.
The larger the ratio of the capacity ratios is, the larger the possibility that the multi-connected unit system fluctuates during the starting of the internal machine to be started is, the more the liquid return problem is likely to occur, at this time, the opening degree control coefficient may not be set to be a constant, but set to be a number negatively correlated with the capacity ratios, for example, in table 2, the smaller the value of the opening degree control coefficient k is with the increase of the capacity ratios. Therefore, when the rated capacity of the internal machine of the new starting machine is small, the system fluctuation is not easy to cause, and the liquid return problem is not easy to generate, the opening degree control coefficient k can be set to be a relatively large number, and when the rated capacity of the internal machine of the new starting machine is large, the system fluctuation is easy to cause, and the liquid return problem is easy to generate, the opening degree control coefficient k can be set to be a relatively small number.
Before obtaining the capacity ratio, the method further comprises the following steps: and acquiring a second mapping relation.
TABLE 2
In one embodiment, the number of internal machines to be started is at least one, and the number of started internal machines is at least one. And the capacity ratio is the ratio of the sum of the rated capacities of all the internal machines to be started to the sum of the rated capacities of all the started internal machines.
When the number of the internal machines to be started is one, the sum of the rated capacities of all the internal machines to be started is the rated capacity of the internal machine to be started, and when the number of the internal machines to be started is multiple (two or more), the sum of the rated capacities of all the internal machines to be started is the sum of the rated capacities of the multiple internal machines to be started. When the number of the started internal machines is one, the sum of the rated capacities of all the started internal machines is the rated capacity of the started internal machines, and when the number of the started internal machines is multiple (two or more), the sum of the rated capacities of all the started internal machines is the sum of the rated capacities of the started internal machines.
The multi-connected unit is exemplified by the case that the multi-connected unit comprises six indoor units, namely an indoor unit 1, an indoor unit 2, an indoor unit 3, an indoor unit 4, an indoor unit 5 and an indoor unit 6, wherein the rated capacity of the indoor unit 1 is 7.1kw, the rated capacity of the indoor unit 2 is 3.6kw, the rated capacity of the indoor unit 3 is 7.1kw, the rated capacity of the indoor unit 4 is 3.6kw, the rated capacity of the indoor unit 5 is 3.6kw, and the rated capacity of the indoor unit 6 is 7.1 kw. If the started internal machine is the internal machine 1 (namely, the started internal machine exists, and the compressor is in a normal operation state at this time), at this time, the internal machine 2 and the internal machine 3 need to be simultaneously opened (the frequency of the compressor is rapidly increased due to the sudden increase of the number of the internal machines, the circulation amount of the refrigerant in unit time of the multi-split system is rapidly increased, and further the liquid return problem possibly occurs, in order to avoid the problem, the initial opening degrees of the internal machines 2 and 3 need to be controlled), the sum of the rated capacities of the internal machines to be started is the sum of the rated capacities of the internal machines 2 and 3, and is 3.6+7.1 ≈ 10.7kw, the sum of the rated capacities of the started internal machines is the rated capacity of the internal machine 1, and is 7.1kw, the capacity ratio is 10.7/7.1 ≈ 1.5, through the mapping relationship of the table 2, the opening degree control coefficients k of the internal machines 2 and 3 are both 0.8, through the mapping relationship of the table 1, the basic opening degree of the internal machine 2 is known as d, when the base opening degree of the inner unit 3 is b, and b, c, d, and e are 300, 350, 380, and 420, respectively, the initial opening degree kb of the inner unit 2 is 0.8 × 300 and 240, and the initial opening degree kd of the inner unit 3 is 0.8 × 380 and 304.
If the started internal machines are the internal machines 2 and 4, the internal machines to be started are the internal machines 1, 3 and 5, the sum of the rated capacities of the internal machines to be started is the sum of the rated capacities of the internal machines 1, 3 and 5, namely 7.1+7.1+3.6 ═ 17.8kw, the sum of the rated capacities of the started internal machines is the sum of the rated capacities of the internal machines 2 and 4, namely 3.6+3.6 ═ 7.2kw, the capacity ratio at this time is 17.8/7.2 ≈ 2.5, through the mapping relation of table 2, the control coefficients k of the internal machines to be started (the internal machines 1, 3 and 5) are all 0.5, through the mapping relation of table 1, the basic opening degree of the internal machine 1 is d, the basic opening degree of the internal machine 3 is d, the basic opening degree of the internal machine 5 is b, when b, c, d and e are respectively 300, 350, 380 and 420, the initial opening degree of the internal machines 1 is equal to 0.5, and the initial opening degree of the internal machines is equal to 190.5, the initial opening of the internal unit 5 is 0.5 × 300 — 150.
It should be noted that the first mapping relationship and the second mapping relationship may include various forms, and are not limited to the forms of table 1 and table 2, and the specific numbers, ratios, and capability segments in table 1 and table 2 are all exemplified, and the actual use is not limited thereto, and the values of b, c, d, and e are also exemplified, and may also be other numerical values. The multi-connected unit comprises six inner machines for illustration, the multi-connected unit can comprise any number of inner machines, and the rated capacity of the inner machines is not limited.
In one embodiment, obtaining the rated capacity of the internal unit to be started includes: acquiring the running mode of an internal machine to be started; and obtaining the rated capacity of the internal machine to be started according to the running mode of the internal machine to be started.
The rated capacity of the indoor unit is related to the operation mode of the indoor unit. The operation modes at least comprise a refrigeration mode and a heating mode, the rated capacity of the machine to be started is obtained according to the operation modes, the machine to be started can be more accurate, and the initial opening degree of the machine to be started can be more accurate.
In one embodiment, obtaining the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and a preset first mapping relation includes: acquiring a first mapping relation corresponding to the operation mode of an internal machine to be started; and obtaining the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started, the operation mode of the internal machine to be started and the first mapping relation.
The operation modes of the to-be-started internal machines are different, the corresponding rated capacities are different, and the corresponding first mapping relationships may also be different, specifically, the values in the corresponding tables may be different, for example, in the cooling mode, a may be 250, the basic opening b, c, d, e values of the to-be-started internal machines may be 300, 350, 380, 420, in the heating mode, a may be 800, and the basic opening b, c, d, e values of the to-be-started internal machines may be 900, 1000, 1050, 1200. Here, in the cooling mode and the heating mode, the numerical values of a, b, c, d, and e are all exemplified, and other numerical values may be used.
In one embodiment, as shown in fig. 4, a method for controlling opening of an indoor unit of a multi-connected unit includes:
And step 402, setting all the initial opening degrees of the internal startup machines as a.
In step 403, the compressor is operated, and the internal machine is turned on from a shutdown.
In step 4051, the internal machine initial opening degree y is kb.
In step 4052, the internal machine initial opening degree y becomes kc.
In step 4053, the internal machine initial opening degree y is kd.
In step 4054, the initial opening y of the internal machine becomes ke.
Wherein, a represents the given opening degree of all the internal machines when the compressor is started; b represents the basic opening degree of the startup internal machine with the rated capacity of (0, 4.5) when the compressor operates, c represents the basic opening degree of the startup internal machine with the rated capacity of (4.5, 5.5) when the compressor operates, d represents the basic opening degree of the startup internal machine with the rated capacity of (5.5, 10) when the compressor operates, e represents the basic opening degree of the startup internal machine with the rated capacity of (10, plus and minus) when the compressor operates, k represents the opening degree control coefficient of the startup internal machine with the compressor operating, and y represents the initial opening degree of the startup internal machine with the compressor operating.
For example, the value of the opening a of the internal machine during the starting of the compressor may be 250, and the values of the basic openings b, c, d, and e of the internal machine during the starting of the compressor may be 300, 350, 380, and 420, or may be other values.
The opening degree control coefficient k has coefficients in the intervals (0, 1), (1, 2), (2, 5) and (5, + ∞) of 1, 0.8, 0.5 and 0.3, respectively, or may have other values.
Taking refrigeration as an example, according to the specific opening values given above, the basic implementation of the system cycle is as follows:
in the initial state, the internal machine is completely shut down, only the internal machine 1 is started during starting, when the system is in refrigerating operation, low-temperature and low-pressure gas enters an air suction port of the compressor 1 from an outlet of the gas-liquid separator 10, is compressed into high-temperature and high-pressure gas in the compressor 1, enters the outdoor heat exchanger 3 through the four-way valve 2, condenses the high-temperature superheated gas into high-temperature and high-pressure liquid, passes through a main electronic expansion valve 5 (the expansion valve has the largest opening degree and is not throttled) of the external machine, passes through the first stop valve 6, and reaches the internal machine electronic expansion valve 71 through a connecting pipeline for throttling, and because the compressor 1 is started to operate, the initial target opening degree of the internal machine electronic expansion valve 71 of the internal machine 1 is 250. The throttled gas-liquid two-phase refrigerant enters the inner machine heat exchanger 81 for heat exchange, passes through the second stop valve 9 through the connecting pipeline, enters the four-way valve 2, then enters the gas-liquid separator 10, and low-temperature and low-pressure gas from the gas-liquid separator 10 enters the suction port of the compressor 1 through the air suction pipe to complete a refrigeration cycle.
After the unit operates for a period of time, the internal unit 2 (rated capacity 3.6kw) and the internal unit 3 (rated capacity 7.1kw) are simultaneously started, so that the compressor is started, and the ratio of the newly started internal unit to the operating internal unit needs to be calculated so as to determine the initial opening. The total capacity of the newly-started indoor unit is (3.6+7.1)/7.1 is 1.5, and it can be seen from table 2 that the ratio is 0.8 at the coefficient k corresponding to the (1, 2) interval, so the initial opening degree of the indoor unit 2 is y2 is 0.8 × 300 is 240, the initial opening degree of the indoor unit 3 is y2 is 0.8 × 380 is 304, that is, the initial opening degree of the indoor unit electronic expansion valve 72 is adjusted to 240, and the initial opening degree of the indoor unit electronic expansion valve 73 is adjusted to 304.
The heating state is similar to the refrigeration cycle, the value of the opening a of the internal machine when the compressor is started can be 800, and the values of the basic openings b, c, d and e of the internal machine when the compressor is started can be 900, 1000, 1050 and 1200, or other values. The calculation method is similar and is not described in detail.
The method comprises the steps of obtaining the basic opening and the opening control coefficient of the internal machine to be started through the rated capacity of the internal machine to be started and the rated capacity of the started internal machine through the first mapping table and the second mapping table, further calculating the initial opening of the internal machine to be started, controlling the internal machine to be started according to the initial opening of the internal machine to be started, avoiding the technical problem of liquid return when the number of the internal machines to be started of the multi-connected unit is increased, protecting the compressor, reducing the fault rate of the compressor and prolonging the service life of the compressor.
Based on the same concept, a second embodiment of the present application provides a device for controlling opening degrees of multiple-connected units, as shown in fig. 5, including:
a first obtaining module 501, configured to obtain a rated capacity of an internal unit to be started;
a second obtaining module 502, configured to obtain a rated capacity of the started internal machine;
a third obtaining module 503, configured to obtain an initial opening degree of the internal machine to be started according to a rated capability of the internal machine to be started and a rated capability of the started internal machine;
the control module 504 is configured to control the internal unit to be started according to the initial opening degree of the internal unit to be started.
The first obtaining module 501 and the second obtaining module 502 are used for obtaining the rated capacity of the internal machine to be started and the rated capacity of the internal machine already started respectively, the third obtaining module 503 is used for obtaining the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the internal machine already started, when the number of the internal machines started by the multi-connected unit increases, the initial opening degree of the internal machine to be started can be accurately controlled through the control module 504, the technical problem that liquid returns are generated when the number of the internal machines started by the multi-connected unit increases is effectively solved, the compressor is protected, the failure rate of the compressor is reduced, and the service life of the compressor is prolonged.
As shown in fig. 6, a third embodiment of the present application provides an electronic device, which includes a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 complete mutual communication via the communication bus 114,
a memory 113 for storing a computer program;
in an embodiment, the processor 111, configured to execute the program stored in the memory 113, is configured to implement the method for controlling an opening degree of a multi-connected unit indoor unit according to any one of the foregoing method embodiments, and includes:
obtaining the rated capacity of an internal machine to be started;
obtaining the rated capacity of the started internal machine;
acquiring the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
and controlling the internal machine to be started according to the initial opening degree of the internal machine to be started.
The communication bus mentioned in the above terminal may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the terminal and other equipment.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
A fourth embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the method for controlling opening degrees of multiple on-line units according to any one of the foregoing method embodiments, including:
obtaining the rated capacity of an internal machine to be started;
obtaining the rated capacity of the started internal machine;
acquiring the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
and controlling the internal machine to be started according to the initial opening degree of the internal machine to be started.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (12)
1. The method for controlling the opening degree of the multi-connected unit indoor unit is characterized by comprising the following steps:
obtaining the rated capacity of an internal machine to be started;
obtaining the rated capacity of the started internal machine;
acquiring the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
and controlling the internal machine to be started according to the initial opening degree of the internal machine to be started.
2. The method for controlling the opening degree of the multi-connected unit indoor unit according to claim 1, wherein the obtaining of the initial opening degree of the indoor unit to be started according to the rated capacity of the indoor unit to be started and the rated capacity of the started indoor unit comprises:
acquiring the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started;
acquiring an opening degree control coefficient of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
and acquiring the initial opening degree of the internal machine to be started according to the basic opening degree of the internal machine to be started and the opening degree control coefficient of the internal machine to be started.
3. The method for controlling the opening degree of the multi-connected unit indoor unit according to claim 2, wherein the basic opening degree of the indoor unit to be started is positively correlated with the rated capacity of the indoor unit to be started.
4. The method for controlling the opening degree of the multi-connected unit indoor unit according to claim 2, wherein the obtaining of the basic opening degree of the indoor unit to be started according to the rated capacity of the indoor unit to be started comprises:
acquiring the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and a preset first mapping relation; the first mapping relation is a mapping relation between the rated capacity of the internal machine to be started and the basic opening of the internal machine to be started.
5. The method for controlling the opening degree of the multi-connected unit indoor unit according to claim 2, wherein the obtaining of the opening degree control coefficient of the to-be-started indoor unit according to the rated capacity of the to-be-started indoor unit and the rated capacity of the started indoor unit comprises:
obtaining the capacity ratio; the capacity ratio is the ratio of the rated capacity of the internal machine to be started to the rated capacity of the started internal machine;
acquiring an opening control coefficient of the internal machine to be started according to the capacity ratio and a preset second mapping relation; the second mapping relation is a mapping relation between the capacity ratio and an opening degree control coefficient of the internal machine to be started.
6. The method for controlling the opening degree of the multi-connected indoor unit according to claim 5, wherein the opening degree control coefficient of the indoor unit to be started is inversely related to the capacity ratio.
7. The method for controlling the opening degree of the multi-connected unit indoor units according to claim 5, wherein the number of the indoor units to be started is at least one, and the number of the started indoor units is at least one;
the capacity ratio is the ratio of the sum of the rated capacities of all the internal machines to be started to the sum of the rated capacities of all the started internal machines.
8. The method for controlling the opening degree of the multi-connected unit indoor unit according to claim 4, wherein the obtaining of the rated capacity of the indoor unit to be started comprises:
acquiring the running mode of an internal machine to be started;
and acquiring the rated capacity of the internal machine to be started according to the running mode of the internal machine to be started.
9. The method for controlling the opening degree of the multi-connected unit indoor unit according to claim 8, wherein the step of obtaining the basic opening degree of the indoor unit to be started according to the rated capacity of the indoor unit to be started and a preset first mapping relation comprises the following steps:
acquiring the first mapping relation corresponding to the operation mode of the internal machine to be started;
and obtaining the basic opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started, the operation mode of the internal machine to be started and the first mapping relation.
10. The utility model provides a many online unit indoor unit aperture controlling means which characterized in that includes:
the first acquisition module is used for acquiring the rated capacity of the internal unit to be started;
the second acquisition module is used for acquiring the rated capacity of the started internal machine;
the third obtaining module is used for obtaining the initial opening degree of the internal machine to be started according to the rated capacity of the internal machine to be started and the rated capacity of the started internal machine;
and the control module is used for controlling the internal machine to be started according to the initial opening degree of the internal machine to be started.
11. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the steps of the method for controlling the opening degree of the multi-connected unit indoor unit according to any one of claims 1 to 9 when executing the program stored in the memory.
12. A computer-readable storage medium, on which a computer program is stored, wherein the computer program, when being executed by a processor, implements the steps of the method for controlling the opening degrees of multiple in-line units according to any one of claims 1 to 9.
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