CN105864981A - Adjusting method and system for multi-split air conditioner - Google Patents
Adjusting method and system for multi-split air conditioner Download PDFInfo
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- CN105864981A CN105864981A CN201610265703.6A CN201610265703A CN105864981A CN 105864981 A CN105864981 A CN 105864981A CN 201610265703 A CN201610265703 A CN 201610265703A CN 105864981 A CN105864981 A CN 105864981A
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- Prior art keywords
- temperature value
- expansion valve
- electric expansion
- aperture
- superheat
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Classifications
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
-
- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
-
- 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
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention provides an adjusting method and system for a multi-split air conditioner. The method includes the steps that the temperature value set by a user and the air inlet temperature value of an indoor unit are obtained; first control information is generated according to the relation between the temperature value set by the user and the air inlet temperature value; and the opening degree of a first electronic expansion valve of the indoor unit is adjusted according to the first control information. By means of the adjusting method and system for the multi-split air conditioner, the indoor unit of the multi-split air conditioner can be flexibly regulated according to the change of the indoor temperature, the change range of the indoor temperature is narrowed, the comfort level is improved, and the control stability and reliability of a multi-split air conditioner system are improved.
Description
Technical field
The present embodiments relate to air-conditioning technical field, particularly relate to a kind of multi-connected machine control method and
System.
Background technology
Multi-connected machine is a kind of indoor apparatus of air conditioner above by air-conditioner outdoor unit coupling two set or two sets
The air conditioning system constituted.It is low that it has operating cost, cooling and warming temperature range width, design freedom
Height, the advantage such as (only with an off-premises station) attractive in appearance easy for installation.
In existing multi-connected machine, under refrigeration mode, indoor set can not be according to indoor temperature to electronic expansion
The aperture of valve is adjusted, and can only realize indoor temperature by the way of being turned on and off electric expansion valve
Ability output regulation (i.e. otherwise 0% output, or 100% output) so that variations in temperature in room
Scope is relatively big, and leaving air temp is sometimes hot and sometimes cold, and comfortableness is poor.And owing to multiple stage indoor set shares one
Platform off-premises station, when there being multiple stage indoor set to run simultaneously, the flow of off-premises station to be simultaneously allocated to each room
Interior machine, therefore, the indoor other being currently running when indoor set constantly turns off or on operation
Machine impacts, and is unfavorable for stability and the reliability of whole multiple on-line system.
Summary of the invention
The embodiment of the present invention provides control method and the system of a kind of multi-connected machine, in order to solve existing multi-connected machine
Cannot be according to indoor temperature flexible modulation due to indoor set in system, the indoor temperature change generated in case scope caused is big,
Comfortableness is poor, system control stability and the relatively low problem of reliability.
Embodiment of the present invention first aspect provides the control method of a kind of multi-connected machine, and the method includes:
Obtain temperature value and the inlet temperature value of indoor set that user sets；
Magnitude relationship between the temperature value and the described inlet temperature value that set according to described user, generates the
One controls information；
The aperture that information regulates the first electric expansion valve of described indoor set is controlled according to described first.
Embodiment of the present invention second aspect provides a kind of multiple on-line system, and this system includes indoor set and outdoor
Machine, wherein, indoor set includes:
First acquisition module, for obtaining temperature value and the inlet temperature value of indoor set that user sets；
First generation module, between temperature value and the described inlet temperature value set according to described user
Magnitude relationship, generate first control information；
First performs module, regulates the first electronics of described indoor set for controlling information according to described first
The aperture of expansion valve.
The embodiment of the present invention, is closed by the size between the temperature value set according to user and inlet temperature value
System, generates control information；And according to the control information generated, the aperture of electronic expansion valve of indoor unit is carried out
Regulation, so that the aperture of electric expansion valve can be finely adjusted by multi-online indoor machine according to indoor temperature,
Thus reduce the excursion of indoor temperature, improve comfort level, enhance the control of multiple on-line system
Stability and reliability.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that,
Accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art
From the point of view of, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
The schematic flow sheet of the control method of the multi-connected machine that Fig. 1 provides for the embodiment of the present invention one；
The schematic flow sheet of the control method of the multi-connected machine that Fig. 2 provides for the embodiment of the present invention two；
The schematic flow sheet of the control method of the multi-connected machine that Fig. 3 provides for the embodiment of the present invention three；
The schematic flow sheet of the control method of the multi-connected machine that Fig. 4 provides for the embodiment of the present invention four；
The schematic flow sheet of the control method of the multi-connected machine that Fig. 5 provides for the embodiment of the present invention five；
The structural representation of the multiple on-line system that Fig. 6 provides for the embodiment of the present invention six；
The structural representation of the multiple on-line system that Fig. 7 provides for the embodiment of the present invention seven；
The structural representation of the multiple on-line system that Fig. 8 provides for the embodiment of the present invention eight；
The structural representation of the multiple on-line system that Fig. 9 provides for the embodiment of the present invention nine；
The structural representation of the multiple on-line system that Figure 10 provides for the embodiment of the present invention ten.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
The term of description and claims of this specification " include " and " having " and they appoint
What deformation, it is intended that cover non-exclusive comprising, such as, contain process or the knot of series of steps
The device of structure is not necessarily limited to those structures of clearly listing or step but can include the most clearly listing
Or for intrinsic other step of these processes or device or structure.
Below from the angle of multi-online indoor machine refrigeration control, in conjunction with specific embodiments to skill of the present invention
Being described as follows of art scheme:
The schematic flow sheet of the control method of the multi-connected machine that Fig. 1 provides for the embodiment of the present invention one, the method
Can be performed by a multiple on-line system.As it is shown in figure 1, the method that the present embodiment provides includes as follows
Step:
Step S101, the temperature value obtaining user's setting and the inlet temperature value of indoor set.
In the present embodiment, the inlet temperature value of indoor set can be by the inlet temperature being disposed in the interior in machine
Sensor detection obtains, it is possible to use line control machine carry the temperature of temperature sensor measurement or remote controller from
Temperature with temperature sensor measurement substitutes.Preferably.In this enforcement, the inlet temperature value of indoor set is logical
Cross what the inlet temperature sensor detection in the machine of being disposed in the interior obtained.
The temperature value that user sets, is set by the human-computer interaction interface on remote controller or indoor set for user
Indoor Temperature angle value.
Further, it is contemplated that the regulation of indoor set needs certain response time and the time of execution, therefore,
Can be according to the response time of indoor set and the time of execution, the regulation for indoor set arranges a regulating cycle
(i.e. period 1), and according to this regulating cycle, the temperature value regularly user set and indoor set
Inlet temperature value obtain, and according to user set temperature value and inlet temperature value, complete room
The periodic adjustment of interior machine.Wherein, this regulating cycle can the most specifically set, general feelings
Under condition, the value of this regulating cycle should be greater than or is equal to the response time of indoor set regulation and performs time sum.
Concrete, in the present embodiment, preferably the span of regulating cycle is set to 30s～180s, i.e. adjusts
The value in joint cycle can be the arbitrary value in this time range.
The span of regulating cycle is set to 30s～180s, can not only ensure what indoor set regulated
Response time and the time of execution, additionally it is possible to avoid owing to regulating cycle is long, the indoor temperature change generated in case caused
Scope is big, the problem affecting comfortableness.
Size between step S102, the temperature value set according to described user and described inlet temperature value is closed
System, generates the first control information.
Concrete, when after the inlet temperature value of the temperature value and indoor set that obtain user's setting, user is set
The inlet temperature value of fixed temperature value and indoor set contrasts, if the temperature value that user sets is more than air intake
Temperature value, then multiple on-line system (hereinafter referred to as system) generates for expanding electronic expansion valve of indoor unit
Control information, if the temperature value that user sets is less than inlet temperature value, then system generates and is used for reducing indoor
The control information of organic electronic expansion valve, if the temperature value that user sets is equal to carrying out temperature value, then system is raw
Become the control information for maintaining the current aperture of electronic expansion valve of indoor unit.Wherein, in the present embodiment, excellent
The aperture range of accommodation of electronic expansion valve of indoor unit is set to 50pls～480pls by choosing.
Further, in order to realize the accurate control to electronic expansion valve of indoor unit, what system generated is used for
Control the control information of electronic expansion valve of indoor unit should include the step number for controlling electronic expansion valve opening
Information, such as, when the temperature value that user sets is more than inlet temperature value, then the control letter that system generates
Should include the step count information increasing electronic expansion valve opening in breath, the temperature value set as user is less than air intake
During temperature value, then the control information that system generates should include the step number letter reducing electronic expansion valve opening
Breath.
Further, in prior art, the acquisition methods of above-mentioned step count information has multiple, the present embodiment
In preferably employ by the way of fuzzy control and PID control to combine, calculate the above-mentioned step count information of acquisition,
Its concrete computational methods similarly to the prior art, here repeat no more.
Step S103, the information that controls according to described first regulate the first electric expansion valve of described indoor set
Aperture.
Concrete, as a example by the temperature value of user's setting is more than inlet temperature value, generating the first control letter
After breath, according to the step count information of the aperture for increasing electronic expansion valve of indoor unit comprised in control information,
Increase the aperture of electronic expansion valve of indoor unit, thus reach according to organic electronic in the independent controlling chamber of indoor temperature
The purpose of expansion valve.When the temperature value that user sets is less than or equal to inlet temperature value, holding of this step
Line mode is similar with above-mentioned executive mode, here repeats no more.
The present embodiment, by the magnitude relationship between the temperature value set according to user and inlet temperature value,
Generate control information；And according to the control information generated, the aperture of electronic expansion valve of indoor unit is adjusted,
The aperture of electric expansion valve can be finely adjusted according to indoor temperature by multi-online indoor machine, thus contract
The little excursion of indoor temperature, improves comfort level, enhances the control stability of multiple on-line system
And reliability.
The schematic flow sheet of the control method of the multi-connected machine that Fig. 2 provides for the embodiment of the present invention two.Such as Fig. 2
Shown in, the method that the present embodiment provides, on the basis of above-mentioned embodiment illustrated in fig. 1, also includes walking as follows
Rapid:
Step S11, the liquid pipe temperature value obtaining described indoor set and trachea temperature value.
In the present embodiment, the liquid pipe temperature value of indoor set preferably can be by the liquid pipe being disposed in the interior in machine
Temperature sensor detection obtains, and the trachea temperature value of indoor set preferably can be by being disposed in the interior in machine
Trachea temperature sensor detection obtains.
Step S12, calculate according to described liquid pipe temperature value and trachea temperature value and obtain changing of described indoor set
The hot device degree of superheat, and according to the described heat exchanger degree of superheat, determine that described first electric expansion valve is executable
Operation, or,
According to described trachea temperature value, determine the described first executable operation of electric expansion valve.
Concrete, in the present embodiment, according to the described heat exchanger degree of superheat, determine described first electronic expansion
The method of the executable operation of valve, can include at least one in following manner:
Mode one
After obtaining the liquid pipe temperature value of indoor set and trachea temperature value, preferably can by trachea temperature value with
Liquid pipe temperature value carries out seeking difference operation, it is thus achieved that the heat exchanger degree of superheat of indoor set, and is obtaining heat exchanger mistake
After temperature, the first threshold calculating the heat exchanger degree of superheat obtained with preset is compared, if heat exchanger
The degree of superheat is less than or equal to first threshold, it is determined that the executable operation of electric expansion valve of indoor set can only
It is to close valve operation.Wherein, first threshold can the most specifically set, generally, the
The value of one threshold value could be arranged to the arbitrary value in the range of-5 DEG C～0 DEG C.
Mode two
After calculating the acquisition heat exchanger degree of superheat, the heat exchanger degree of superheat can be entered with the Second Threshold preset
Row compares, if the heat exchanger degree of superheat is more than or equal to Second Threshold, it is determined that the first electric expansion valve can be held
The operation of row is only valve opening operation.Wherein, similar with first threshold, Second Threshold can also basis
Concrete needs specifically sets, and generally, the value of Second Threshold could be arranged to 10 DEG C～20 DEG C of scopes
Interior arbitrary value.
Further, according to trachea temperature value in the present embodiment, determine that electronic expansion valve of indoor unit can perform
The method of operation, can be preferably that the inlet temperature value of indoor set is asked with the 3rd threshold value preset
Difference operation, and the trachea temperature value of the result of computing with indoor set is compared, if operation result is less than
Or the trachea temperature value equal to indoor set, it is determined that the executable operation of electric expansion valve of indoor set can only
Operate for valve opening.Wherein, the value of the 3rd threshold value can the most specifically set, ordinary circumstance
Under, the value of the 3rd threshold value could be arranged to the arbitrary value in the range of 2 DEG C～10 DEG C.
The present embodiment is by carrying out the heat exchanger degree of superheat/trachea temperature value of indoor set with the threshold value preset
Relatively, and the current indoor executable operation of organic electronic expansion valve is determined according to comparative result, it is possible to keep away
Exempt from owing to indoor set is caused damage by electric expansion valve misoperation.
The schematic flow sheet of the control method of the multi-connected machine that Fig. 3 provides for the embodiment of the present invention three.Such as Fig. 3
Shown in, the method that the present embodiment provides, on the basis of above-mentioned embodiment illustrated in fig. 2, also includes walking as follows
Rapid:
Step S21, obtain the aperture that described first electric expansion valve is current；
In the present embodiment, the aperture of electric expansion valve can be obtained by the memory function of system CPU, such as
When being adjusted electronic expansion valve of indoor unit, CPU can be to the aperture of the electric expansion valve after adjusting
Value carries out automatic record, it is also possible to the aperture current according to electric expansion valve and currently adjust electric expansion valve
Step count information, obtain the opening value of electric expansion valve after adjusting.
Step S22, according to described aperture, determine the described first executable operation of electric expansion valve.
Concrete, after obtaining the aperture that electronic expansion valve of indoor unit is current, electric expansion valve can be worked as
Front aperture contrasts with the 4th threshold value preset, if the aperture of electric expansion valve is less than or equal to the 4th
Threshold value, then may determine that the executable operation of electronic expansion valve of indoor unit is only valve opening operation.Wherein,
The value of the 4th threshold value can the most specifically set, and generally, the value of the 4th threshold value can
It is determined with the critical closing point according to electric expansion valve.Such as in the indoor set closedown of electric expansion valve
Marginal value is 50pls, then the value of the 4th threshold value could be arranged to the arbitrary value more than or equal to 50pls.
The present embodiment by by aperture current for electronic expansion valve of indoor unit with preset threshold value compare,
And determine the current indoor executable operation of organic electronic expansion valve according to comparative result, it is possible to avoid due to
The mistake of electric expansion valve is closed, and control stability and reliability to system adversely affect..
The schematic flow sheet of the control method of the multi-connected machine that Fig. 4 provides for the embodiment of the present invention four.Such as Fig. 4
Shown in, the method that the present embodiment provides, on the basis of above-mentioned embodiment illustrated in fig. 1, also includes walking as follows
Rapid:
Step S201, obtain the current discharge superheat of off-premises station and the target exhaust degree of superheat.
Concrete, in the present embodiment, the discharge superheat that off-premises station is current, preferably through by off-premises station
The delivery temperature of middle compressor and condensation temperature obtain after seeking difference operation, wherein, and the aerofluxus of off-premises station
Temperature preferably can be obtained by the exhaust gas temperature sensor detection being disposed in the outdoor in machine, and condensation temperature is excellent
Choosing can be changed according to the measured value of the high pressure sensor in off-premises station and obtain, its conversion method and existing skill
Art is similar to, and here repeats no more.
Further, in the present embodiment, the target exhaust degree of superheat of off-premises station is preferably according in off-premises station
The condensation temperature of compressor, evaporating temperature, and rotating speed, inquiry target exhaust degree of superheat table obtains.
Wherein, rotating speed preferably can be obtained by the speed probe detection being disposed in the outdoor in machine.Evaporating temperature
Preferably can change according to the measured value of the low pressure sensor in off-premises station and obtain, its conversion method is with existing
Method in technology is similar to, and here repeats no more.
Regulation in view of off-premises station needs certain response time and the time of execution, therefore, it can basis
The response time of off-premises station and the time of execution, one regulating cycle is set for the regulation of off-premises station (the most default
Second round), and according to this regulating cycle, regularly discharge superheat and the target row to off-premises station
The gas degree of superheat obtains, and according to this discharge superheat and the target exhaust degree of superheat, completes off-premises station
Periodic adjustment.This regulating cycle can the most specifically set, generally this regulation
The value in cycle should be greater than or is equal to the response time of off-premises station regulation and performs time sum.Concrete, this
In embodiment, preferably the span of regulating cycle being set to 10s～90s, i.e. the value of regulating cycle can
Think the arbitrary value in the range of this.
The span of off-premises station regulating cycle is set to 10s～90s, can not only ensure that off-premises station is adjusted
Joint response time and perform the time, additionally it is possible to avoid owing to regulating cycle is long, the off-premises station caused and
Cooperation between indoor set is inharmonious, and range of temperature is relatively big, the problem that comfortableness is poor.
Step S202, according to the size between the described current exhaust degree of superheat and the described target exhaust degree of superheat
Relation, generates the second control information.
Concrete, after obtaining the current discharge superheat of off-premises station and the target exhaust degree of superheat, by outdoor
Discharge superheat and the target exhaust degree of superheat that machine is currently practical contrast, if currently practical aerofluxus
Temperature is more than the target exhaust degree of superheat, then system generates the control letter of organic electronic expansion valve outside expansion chamber
Breath, if the currently practical discharge superheat of off-premises station is less than the target exhaust degree of superheat, then system generates and is used for
Reduce the control information of off-premises station electric expansion valve, if the currently practical discharge superheat of off-premises station is equal to mesh
Mark discharge superheat, then system generates the control information for maintaining the current aperture of off-premises station electric expansion valve.
Further, in order to realize the accurate control to off-premises station electric expansion valve, what system generated is used for
The control information of the outer organic electronic expansion valve of control room should include the step number for controlling electronic expansion valve opening
Information, such as, when the discharge superheat that off-premises station is currently practical is more than the target exhaust degree of superheat, be then
The control information that system generates should include the step count information increasing electronic expansion valve opening, when off-premises station is current
When actual discharge superheat is less than the target exhaust degree of superheat, then the control information that system generates should be wrapped
Include the step count information reducing electronic expansion valve opening.
Further, in prior art, the acquisition methods of above-mentioned step count information has multiple, the present embodiment
In preferably employ by the way of fuzzy control and PID control to combine, calculate the above-mentioned step count information of acquisition.
Its concrete computational methods similarly to the prior art, here repeat no more.
Step S203, the information that controls according to described second regulate the second electric expansion valve of described off-premises station
Aperture.
This step here repeats no more with in embodiment illustrated in fig. 1, the executive mode of step S103 is similar.
Further, in the present embodiment, before step S201, it is also possible to include off-premises station electronics
The initialization step of expansion valve.
Concrete, when off-premises station electric expansion valve is initialized, first have in off-premises station each group
The state of part carries out detecting (whether the most each assembly is in normal operating conditions etc.).Meanwhile, originally
Embodiment also needs to from the module information of the off-premises station prestoring/writing, whether determine in off-premises station
Including subcooler, if including, the aperture of off-premises station electric expansion valve is initialized as (e+f) pls also
The open range of off-premises station electric expansion valve is configured to (e+f) pls～480pls.If not including, then
The aperture of off-premises station electric expansion valve is initialized as (e-f) pls, and by off-premises station electric expansion valve
Open range is configured to (e-f) pls～480pls.Wherein, e is to face according to off-premises station electric expansion valve
Boundary's close point determines, f determines according to a critical deviation value that opens, the value of the e value more than f.
Big between discharge superheat and the target exhaust degree of superheat that the present embodiment is current by judging off-premises station
Little relation, it is achieved that the independent regulation and control of off-premises station in multi-connected machine, and be the independent regulation and control of multi-online indoor machine
Provide possibility so that system can be by the independent regulation and control to indoor set, it is achieved reduce indoor temperature and become
Change scope, improves comfort level, strengthens control stability and the purpose of reliability of multiple on-line system.
The schematic flow sheet of the control method of the multi-connected machine that Fig. 5 provides for the embodiment of the present invention five.Such as Fig. 5
Shown in, the method that the present embodiment provides, on the basis of above-mentioned embodiment illustrated in fig. 4, also includes walking as follows
Rapid:
Step S31, the suction temperature obtaining compressor in described off-premises station and evaporating temperature, according to described
Suction temperature and described evaporating temperature determine the suction superheat of described off-premises station.
In the present embodiment, the suction temperature of compressor in off-premises station, preferably can be by being disposed in the outdoor machine
In suction temperature sensor detection obtain.
Evaporating temperature preferably can be obtained by the measured value conversion of off-premises station mesolow sensor, its conversion
Method is similar with method of the prior art, here repeats no more.
In the present embodiment, after the suction temperature obtaining compressor in off-premises station and evaporating temperature, preferably may be used
With by carrying out seeking difference operation by suction temperature and evaporating temperature, it is thus achieved that the suction superheat of off-premises station.
Step S32, by described suction superheat with preset the 5th threshold value contrast, if described air-breathing
The degree of superheat is more than or equal to described 5th threshold value, then the second electric expansion valve described in enforced opening.
Concrete, in the present embodiment, the value of the 5th threshold value can the most specifically set, typically
In the case of, the value of the 5th threshold value can be the arbitrary value in the range of 15 DEG C～40 DEG C.
The present embodiment on the basis of embodiment illustrated in fig. 4, by by the suction superheat of off-premises station with pre-
If threshold value compare, it may be judged whether need enforced opening off-premises station electric expansion valve (the i.e. second electronics
Expansion valve), it is possible to realize automatically turning on the purpose of off-premises station electric expansion valve according to the value of suction superheat.
The structural representation of the multiple on-line system that Fig. 6 provides for the embodiment of the present invention six, as shown in Figure 6,
The multiple on-line system that the present embodiment provides, including indoor set and off-premises station, wherein, indoor set includes as follows
Module:
First acquisition module 010, for obtaining temperature value and the inlet temperature value of indoor set that user sets；
First generation module 020, for the temperature value and the described inlet temperature value that set according to described user
Between magnitude relationship, generate first control information；
First performs module 030, regulates the first of described indoor set for controlling information according to described first
The aperture of electric expansion valve.
Wherein, described first generation module 020, specifically for:
If the temperature value that described user sets be more than described in carry out pathogenic wind-warm angle value, then generate be used for expanding described
Described the first of aperture controls information；
If described user's set temperature value be less than described in carry out pathogenic wind-warm angle value, then generate and open described in being used for reducing
Described the first of degree controls information；
If described user's set temperature value be equal to described in carry out pathogenic wind-warm angle value, then generate and open described in being used for maintaining
Described the first of degree controls information.
Described first control information includes the step count information for controlling described first electronic expansion valve opening.
Described first acquisition module 010, specifically for:
The temperature value and the described inlet temperature value that set described user according to the default period 1 obtain
Take.
Further, described first generation module 020, including；
First calculating sub module 021, obtains described step number for controlling to calculate according to fuzzy control and PID
Information.
The multiple on-line system that the present embodiment provides, it is possible to for performing method as shown in Figure 1, it performs
Mode is similar with embodiment illustrated in fig. 1 with beneficial effect, here repeats no more.
The structural representation of the multiple on-line system that Fig. 7 provides for the embodiment of the present invention seven, as it is shown in fig. 7,
The multiple on-line system that the present embodiment provides is on the basis of embodiment illustrated in fig. 6, and described indoor set also includes:
Second acquisition module 040, for obtaining liquid pipe temperature value and the trachea temperature value of described indoor set；
First determines module 050, obtains institute for calculating according to described liquid pipe temperature value and trachea temperature value
State the heat exchanger degree of superheat of indoor set, and according to the described heat exchanger degree of superheat, determine that described first electronics is swollen
The executable operation of swollen valve, or,
According to described trachea temperature value, determine the described first executable operation of electric expansion valve.
Wherein, described first determines module 050, including:
First determines submodule 051, for the described heat exchanger degree of superheat being carried out with the first threshold preset
Relatively, if the described heat exchanger degree of superheat is more than or equal to described first threshold, it is determined that described first electronics
The executable operation of expansion valve is valve opening operation；Or,
The described heat exchanger degree of superheat is compared with the Second Threshold preset, if the described heat exchanger degree of superheat
Less than or equal to described Second Threshold, it is determined that the described first executable operation of electric expansion valve is for closing valve
Operation.
Second determines submodule 052, for calculating the difference of described inlet temperature value and the 3rd threshold value preset
Value, and described difference is compared with described trachea temperature value；
If described difference is less than or equal to described trachea temperature value, it is determined that described first electric expansion valve can
The operation performed is valve opening operation.
The present embodiment provide multiple on-line system can be used in method as shown in Figure 2, its executive mode and
Beneficial effect is similar with embodiment illustrated in fig. 2, here repeats no more.
The structural representation of the multiple on-line system that Fig. 8 provides for the embodiment of the present invention eight, as shown in Figure 8,
The multiple on-line system that the present embodiment provides is on the basis of embodiment illustrated in fig. 7, and described indoor set also includes:
3rd acquisition module 060, for obtaining the aperture that described first electric expansion valve is current；
Second determines module 070, for according to according to described aperture, determines described first electric expansion valve
Executable operation.
Wherein, described second determines module 070, specifically for:
Described aperture is compared with the 4th threshold value preset, if described aperture is less than or equal to described the
Four threshold values, it is determined that the described first executable operation of electric expansion valve is valve opening operation.
The multiple on-line system that the present embodiment provides can be used in the method performed as shown in Figure 3, its side of execution
Formula is similar with embodiment illustrated in fig. 3 with beneficial effect, here repeats no more.
The structural representation of the multiple on-line system that Fig. 9 provides for the embodiment of the present invention nine, as it is shown in figure 9,
The present embodiment provide multiple on-line system on the basis of embodiment illustrated in fig. 8, the off-premises station of described system
Including:
4th acquisition module 080, is used for obtaining the current discharge superheat of off-premises station and target exhaust is overheated
Degree；
Second generation module 090, for overheated with described target exhaust according to the described current exhaust degree of superheat
Magnitude relationship between degree, generates the second control information；
Second performs module 100, regulates the second of described off-premises station for controlling information according to described second
The aperture of electric expansion valve.
Initialization module 101, for initializing described second electric expansion valve.
Wherein, described 4th acquisition module 080, specifically for:
Detection obtains the delivery temperature of compressor in described off-premises station, condensation temperature, evaporating temperature and turns
Speed；
According to described delivery temperature and described condensation temperature, calculate and obtain described discharge superheat；
According to described condensation temperature, described evaporating temperature, and described rotating speed, inquiry target exhaust is overheated
Degree table, it is thus achieved that the described target exhaust degree of superheat.
Described second generation module 090, specifically for:
If the described current exhaust degree of superheat is more than the described target exhaust degree of superheat, then generate be used for expanding described
Described the second of aperture controls information；
If the described current exhaust degree of superheat is less than the described target exhaust degree of superheat, then generate be used for reducing described
Described the second of aperture controls information；
If the described current exhaust degree of superheat is equal to the described target exhaust degree of superheat, then generates and be used for remaining described
Described the second of aperture controls information.
Described second control information includes the step count information for controlling described second electronic expansion valve opening.
Described second generation module 090, including:
Second calculating sub module 091, obtains described step number for controlling to calculate according to fuzzy control and PID
Information.
Described 4th acquisition module 080, specifically for:
According to default second round, obtain the current discharge superheat of described off-premises station and described target row
The gas degree of superheat.
Described initialization module 101, specifically for:
Detect in described off-premises station and whether include subcooler, if described off-premises station includes described subcooler,
Then the aperture of described second electric expansion valve is initialized as (e+f) pls, if described off-premises station does not includes
Described subcooler, then be initialized as (e-f) pls by the aperture of described second electric expansion valve, wherein
E is according to determining by closed form expansion valve critical keying point, and f is to determine according to critical keying point deviation value
's.
Described initialization module 101, is specifically additionally operable to:
When described off-premises station does not includes described subcooler, by the aperture model of described second electric expansion valve
Enclose and be configured to (e-f) pls～480pls；
When described off-premises station includes described subcooler, by the open range of described second electric expansion valve
It is configured to (e+f) pls～480pls.
The multiple on-line system that the present embodiment provides, it is possible to for performing method as shown in Figure 4, it performs
Mode is similar with embodiment illustrated in fig. 4 with beneficial effect, here repeats no more.
The structural representation of the multiple on-line system that Figure 10 provides for the embodiment of the present invention ten, as shown in Figure 10,
The present embodiment provide multiple on-line system on the basis of embodiment illustrated in fig. 9, the off-premises station of described system
Also include:
5th acquisition module 102, for obtaining the suction temperature of compressor and evaporation temperature in described off-premises station
Degree；
3rd determines module 103, for determining described room according to described suction temperature and described evaporating temperature
The suction superheat of outer machine；
Described second performs module 100, is additionally operable to enter described suction superheat with the 5th threshold value preset
Row contrast, if described suction superheat is more than or equal to described 5th threshold value, then described in enforced opening second
Electric expansion valve.
The multiple on-line system that the present embodiment provides, it is possible to for performing method as shown in Figure 5, it performs
Mode is similar with embodiment illustrated in fig. 5 with beneficial effect, here repeats no more.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.
Claims (18)
1. the control method of a multi-connected machine, it is characterised in that including:
Obtain temperature value and the inlet temperature value of indoor set that user sets；
Magnitude relationship between the temperature value and the described inlet temperature value that set according to described user, generates the
One controls information；
The aperture that information regulates the first electric expansion valve of described indoor set is controlled according to described first.
Method the most according to claim 1, it is characterised in that described set according to described user
Magnitude relationship between temperature value and described inlet temperature value, generates the first control information, including:
If the temperature value that described user sets be more than described in carry out pathogenic wind-warm angle value, then generate be used for expanding described
Described the first of aperture controls information；
If the temperature value that described user sets be less than described in carry out pathogenic wind-warm angle value, then generate be used for reducing described
Described the first of aperture controls information；
If the temperature value that described user sets carries out pathogenic wind-warm angle value described in being equal to, then generate and be used for remaining described
Described the first of aperture controls information.
3. according to the method shown in claim 2, it is characterised in that described first control information includes using
In the step count information of described first electronic expansion valve opening of control, wherein, described step count information is according to mould
Stick with paste and control to control what calculating obtained with PID.
Method the most according to claim 1, it is characterised in that described method also includes:
Obtain liquid pipe temperature value and the trachea temperature value of described indoor set；
The heat exchanger degree of superheat of described indoor set is determined according to described liquid pipe temperature value and trachea temperature value, and
According to the described heat exchanger degree of superheat, determine the described first executable operation of electric expansion valve, or,
According to described trachea temperature value, determine the described first executable operation of electric expansion valve.
Method the most according to claim 4, it is characterised in that described overheated according to described heat exchanger
Degree, determines the described first executable operation of electric expansion valve, including:
The relatively described heat exchanger degree of superheat and the size of default first threshold, if the described heat exchanger degree of superheat
More than or equal to described first threshold, it is determined that the described first executable operation of electric expansion valve is valve opening
Operation；Or,
The relatively described heat exchanger degree of superheat and the size of default Second Threshold, if the described heat exchanger degree of superheat
Less than or equal to described Second Threshold, it is determined that the described first executable operation of electric expansion valve is for closing valve
Operation.
Method the most according to claim 4, it is characterised in that described according to described trachea temperature value,
Determine the described first executable operation of electric expansion valve, including:
Calculate the difference of described inlet temperature value and the 3rd threshold value preset, and relatively described difference is with described
The size of trachea temperature value；
If described difference is less than or equal to described trachea temperature value, it is determined that described first electric expansion valve can
The operation performed is valve opening operation.
Method the most according to claim 1, it is characterised in that described method also includes:
Obtain the aperture that described first electric expansion valve is current；
According to described aperture, determine the described first executable operation of electric expansion valve.
Method the most according to claim 7, it is characterised in that described according to described aperture, determines
The described first executable operation of electric expansion valve, including:
Relatively described aperture and the 4th threshold size preset, if described aperture is less than or equal to the described 4th
Threshold value, it is determined that the described first executable operation of electric expansion valve is valve opening operation.
9. according to the method described in any one of claim 1-8, it is characterised in that described acquisition user sets
The inlet temperature value of fixed temperature value and indoor set, including:
According to the default period 1, obtain temperature value and described inlet temperature value that described user sets.
10. a multiple on-line system, described system includes indoor set and off-premises station, it is characterised in that institute
State indoor set to include:
First acquisition module, for obtaining temperature value and the inlet temperature value of indoor set that user sets；
First generation module, between temperature value and the described inlet temperature value set according to described user
Magnitude relationship, generate first control information；
First performs module, regulates the first electronics of described indoor set for controlling information according to described first
The aperture of expansion valve.
11. multiple on-line system according to claim 10, it is characterised in that described first generates mould
Block, specifically for:
If the temperature value that described user sets be more than described in carry out pathogenic wind-warm angle value, then generate be used for expanding described
Described the first of aperture controls information；
If the temperature value that described user sets be less than described in carry out pathogenic wind-warm angle value, then generate be used for reducing described
Described the first of aperture controls information；
If the temperature value that described user sets carries out pathogenic wind-warm angle value described in being equal to, then generate and be used for remaining described
Described the first of aperture controls information.
12. multiple on-line system according to claim 11, it is characterised in that described first controls letter
Breath includes the step count information for controlling described first electronic expansion valve opening；
Described first generation module, including:
First calculating sub module, obtains described step count information for controlling to calculate according to fuzzy control and PID.
13. multiple on-line system according to claim 10, it is characterised in that described indoor set, also
Including:
Second acquisition module, for obtaining liquid pipe temperature value and the trachea temperature value of described indoor set；
First determines module, for determining described indoor set according to described liquid pipe temperature value and trachea temperature value
The heat exchanger degree of superheat, and according to the described heat exchanger degree of superheat, determine that described first electric expansion valve can be held
The operation of row, or,
According to described trachea temperature value, determine the described first executable operation of electric expansion valve.
14. multiple on-line system according to claim 13, it is characterised in that described first determines mould
Block, including:
First determines submodule, for the size of the relatively described heat exchanger degree of superheat with the first threshold preset,
If the described heat exchanger degree of superheat is more than or equal to described first threshold, it is determined that described first electric expansion valve
Executable operation is valve opening operation；Or,
The relatively described heat exchanger degree of superheat and the size of default Second Threshold, if the described heat exchanger degree of superheat
Less than or equal to described Second Threshold, it is determined that the described first executable operation of electric expansion valve is for closing valve
Operation.
15. multiple on-line system according to claim 13, it is characterised in that described first determines mould
Block, including: second determines submodule；
Described second determines submodule, for calculating the difference of described inlet temperature value and the 3rd threshold value preset
Value, and relatively described difference and the size of described trachea temperature value；
If described difference is less than or equal to described trachea temperature value, it is determined that described first electric expansion valve can
The operation performed is valve opening operation.
16. multiple on-line system according to claim 10, it is characterised in that described indoor set, also
Including:
3rd acquisition module, for obtaining the aperture that described first electric expansion valve is current；
Second determines module, for according to described aperture, determines that described first electric expansion valve is executable
Operation.
17. multiple on-line system according to claim 16, it is characterised in that described second determines mould
Block, specifically for:
The relatively size of described aperture and the 4th threshold value preset, if described aperture is less than or equal to described the
Four threshold values, it is determined that the described first executable operation of electric expansion valve is valve opening operation.
18. according to the multiple on-line system described in any one of claim 10-17, it is characterised in that described
First acquisition module, specifically for:
According to the default period 1, obtain temperature value and described inlet temperature value that described user sets.
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| CN106545969A (en) * | 2016-11-22 | 2017-03-29 | 广东美的暖通设备有限公司 | Multiple on-line system and its outdoor restricting element control method |
| CN109764488A (en) * | 2018-12-29 | 2019-05-17 | 珠海格力电器股份有限公司 | Multi-gang air-conditioner control method, device and unit |
| CN110173861A (en) * | 2019-05-31 | 2019-08-27 | 广东美的制冷设备有限公司 | Progress control method, control device, air conditioner and computer readable storage medium |
| CN110715466A (en) * | 2019-09-27 | 2020-01-21 | 同济大学 | Multi-connected air conditioning system and control method thereof |
| CN110808885A (en) * | 2019-10-14 | 2020-02-18 | 珠海格力电器股份有限公司 | Wake-up control method and device, storage medium and multi-split system |
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| CN113757953A (en) * | 2021-08-23 | 2021-12-07 | 浙江中广电器股份有限公司 | Control method of comfortable multi-split air conditioner |
| CN114838487A (en) * | 2022-05-16 | 2022-08-02 | 美的集团武汉暖通设备有限公司 | Control method of multi-split air conditioner, multi-split air conditioner and storage medium |
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