CN106352585B - Air-conditioning system and its control method - Google Patents
Air-conditioning system and its control method Download PDFInfo
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- CN106352585B CN106352585B CN201610867627.6A CN201610867627A CN106352585B CN 106352585 B CN106352585 B CN 106352585B CN 201610867627 A CN201610867627 A CN 201610867627A CN 106352585 B CN106352585 B CN 106352585B
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- air
- unit
- conditioning system
- throttle
- throttling
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Classifications
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
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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
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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
- F24F2110/00—Control inputs relating to air properties
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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
Abstract
The present invention discloses a kind of air-conditioning system, compressor, reversing unit, outdoor heat exchanger, first throttle unit, gas-liquid separator, the second throttling unit, indoor heat exchanger of the twin-tub independent compression including being sequentially connected and being formed refrigerant circulation circuit；It is characterized in that, the air-conditioning system further includes controller, the controller calculates the coolant throttle degree of first throttle unit or the second throttling unit according to the operating parameter of air-conditioning system, and the ratio value between the two according to the preset first throttle unit and the second throttling unit, determine the coolant throttle degree of second throttling unit or first throttle unit.The invention also discloses a kind of control methods of air-conditioning system.The present invention can not only guarantee the operational energy efficiency of air-conditioning system, but also the air-conditioning system can also be allow quickly to meet operation demand.
Description
Technical field
The present invention relates to air-conditioning technical field, in particular to a kind of air-conditioning system and its control method.
Background technique
Current air-conditioning system does not optimize cyclic design to the gaseous refrigerant after throttling and into before evaporator,
Cause gaseous refrigerant to influence evaporator heat exchange performance, and increase compressor compresses power consumption, to influence energy efficiency of air conditioner
It is horizontal.
Although the heating capacity of air-conditioning system at low and ultra-low temperatures can be improved in air injection enthalpy-increasing and twin-tub compress technique
Level, but in the control of air-conditioning system, in order to guarantee the normal operation and operational energy efficiency of air-conditioning system, throttling set
Flow restriction control is of crucial importance, such as when air-conditioning system operation refrigeration mode, is recycled by first throttling device to outdoor heat exchanger
Refrigerant out carries out a reducing pressure by regulating flow, carries out second throttle drop by the refrigerant that second throttling device is recycled to indoor heat exchanger
Pressure.But existing flow restriction control is all independent control, is adjusted according to respective affecting parameters, not can guarantee air-conditioning so
The operational energy efficiency of system.
Summary of the invention
The main object of the present invention is to provide a kind of air-conditioning system and its control method, it is intended to which air-conditioning system carries out independent control
When system throttling, guarantee the operational energy efficiency of air-conditioning system.
To achieve the above object, a kind of air-conditioning system proposed by the present invention, including be sequentially connected and form refrigerant circulation and return
The compressor of the twin-tub independent compression on road, reversing unit, outdoor heat exchanger, first throttle unit, gas-liquid separator, the second throttling
Unit, indoor heat exchanger；The air-conditioning system further includes controller, and the controller is calculated according to the operating parameter of air-conditioning system
The coolant throttle degree of first throttle unit or the second throttling unit, and according to the preset first throttle unit and the second section
Unit ratio value between the two is flowed, determines the coolant throttle degree of second throttling unit or first throttle unit.
Preferably, the first throttle unit includes the first electric expansion valve, and second throttling unit includes the second electricity
Sub- expansion valve, the preset ratio value are aperture ratio value corresponding with coolant throttle degree.
Preferably, the value range of the aperture ratio value is [0.1,10].
Preferably, the operating parameter of the air-conditioning system includes the running frequency of compressor and the operation temperature of air-conditioning system
Degree, wherein the running temperature includes the delivery temperature of compressor, outdoor environment temperature.
Preferably, the running frequency of the compressor includes the current operation frequency or frequency change of compressor.
Preferably, the running temperature includes current temperature value or temperature change value.
To achieve the above object, the present invention also provides a kind of control methods of air-conditioning system, comprising the following steps:
During operation of air conditioner, the operating parameter of air-conditioning system is obtained；
The coolant throttle degree of first throttle unit or the second throttling unit is calculated according to the operating parameter of air-conditioning system, and
According to the preset first throttle unit and the second throttling unit ratio value between the two, second throttling unit is determined
Or the coolant throttle degree of first throttle unit；
According to the coolant throttle extent control first throttle of the identified first throttle unit and the second throttling unit
Unit and the second throttling unit.
Preferably, the throttling control with the throttling of the second throttling unit control of the first throttle unit be synchronously control or
Successively control.
Preferably, it in the operating parameter variation of the air-conditioning system, is calculated simultaneously according to the operating parameter after variation again
Determine the coolant throttle degree of first throttle unit and the second throttling unit.
Air-conditioning system and its control method provided by the invention first determine the cold of a throttling unit according to air conditioner operation parameters
Matchmaker's throttle degree determines another section further according to preset first throttle unit and the second throttling unit ratio value between the two
The coolant throttle degree for flowing unit, it is single using two throttlings because being calculated separately without the throttle degree of two throttling units
The throttling ratio value of member, as long as after the throttle opening of one throttling unit of acquisition, being obtained in addition according to throttling ratio value
The throttle opening of one throttling unit.In this way, can not only guarantee the operational energy efficiency of air-conditioning system, and make the air-conditioning system
Operation demand can quickly be met.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
The structure shown according to these attached drawings obtains other attached drawings.
Fig. 1 is the structural schematic diagram of one embodiment of air-conditioning system of the present invention；
Fig. 2 is the flow diagram of one embodiment of control method of air-conditioning system of the present invention；
Fig. 3 is the flow diagram of two embodiment of control method of air-conditioning system of the present invention.
Drawing reference numeral explanation:
| Label | Title | Label | Title |
| 1 | Compressor | 11 | First cylinder |
| 12 | Second cylinder | 13 | First fluid reservoir |
| 14 | Second fluid reservoir | 2 | Reversing unit |
| 3 | Outdoor heat exchanger | 4 | First throttle unit |
| 5 | Gas-liquid separator | 6 | Second throttling unit |
| 7 | Indoor heat exchanger |
The embodiments will be further described with reference to the accompanying drawings for the realization, the function and the advantages of the object of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
If it is to be appreciated that be related in the embodiment of the present invention directionality instruction (such as up, down, left, right, before and after ...),
It is only used for explaining in relative positional relationship, the motion conditions etc. under a certain particular pose (as shown in the picture) between each component,
If the particular pose changes, directionality instruction is also correspondingly changed correspondingly.
If being used for description purposes only in addition, being related to the description of " first ", " second " etc. in the present invention, and cannot
It is interpreted as its relative importance of indication or suggestion or implicitly indicates the quantity of indicated technical characteristic.Define as a result, " the
One ", the feature of " second " can explicitly or implicitly include at least one of the features.In addition, the skill between each embodiment
Art scheme can be combined with each other, but must be based on can be realized by those of ordinary skill in the art, when technical solution
Will be understood that the combination of this technical solution is not present in conjunction with there is conflicting or cannot achieve when, also not the present invention claims
Protection scope within.
Please refer to Fig. 1, air-conditioning system provided by the present invention, comprising: be sequentially communicated and the twin-tub for forming coolant loop is only
Compressor 1, the reversing unit 2, outdoor heat exchanger 3, first throttle unit 4, gas-liquid separator 5, the second throttling unit of vertical compression
6, indoor heat exchanger 7.Wherein compressor 1 includes shell, is equipped with the first cylinder 11 and the second cylinder 12, shell peripheral hardware in the shell
There are the first fluid reservoir 13 and the second fluid reservoir 14.The exhaust outlet being connected to reversing unit 2 is additionally provided on 1 shell of compressor, with the
First gas returning port of the air entry connection of one cylinder 11, and the second gas returning port being connected to the air entry of the second cylinder 12.The
One liquid storage fills 13 one end and is connected to reversing unit 2, and the other end is connected to the first gas returning port；Second liquid storage fills 14 one end and gas-liquid point
Gas vent connection from device 5, the other end are connected to the second gas returning port.It is understood that second liquid storage fill 14 can also be with
It omits.Being communicated with the second fluid reservoir 14 in the second gas returning port is the stability in order to further increase air-conditioning system.
This air-conditioning passes through the independent compression of the first cylinder 11 and the second cylinder 12, is discharged from the first cylinder 11 compressed
Refrigerant and from the second cylinder 12 be discharged compressed refrigerant be drained into shell 1 respectively then from exhaust outlet be discharged.In addition, gas
The gas vent of liquid/gas separator 5 is directly connected to the gas returning port of compressor 1, passes through gas-liquid point by the refrigerant of first throttle unit 4
After device 5, gaseous coolant recycles compression by the second cylinder 12 of gas vent to the compressor 1 of gas-liquid separator 5, reduces pressure
Contracting power consumption, improving energy efficiency.
Specifically, the value range of the delivery space ratio of above-mentioned second cylinder 12 and the first cylinder 11 is 1%~10%.
Further, the value range of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 1%~9%, it is preferable that second
The value range of the delivery space ratio of cylinder 12 and the first cylinder 11 is 4%~9%.Such as second cylinder 12 and the first cylinder
11 delivery space ratio can be the parameters such as 4%, 5%, 8% or 8.5%.
Above-mentioned reversing unit 2 is preferably four-way valve, fills 13 by the first liquid storage and is connected to the first gas returning port, reversing unit
2 include the first valve port D to the 4th valve port S, and the first valve port D is connected to one of in the second valve port C and third valve port E, the
Four valve port S are connected to another in the second valve port C and the third valve port E, the exhaust outlet phase of the first valve port D and compressor 1
Even, the 4th valve port S is connected with the first fluid reservoir 13.The first end of outdoor heat exchanger 3 is connected with the second valve port C, indoor heat exchanger 7
First end be connected with third valve port E.Specifically, when heating and air conditioner 100 is freezed, the first valve port D and the second valve port C connect
Logical and third valve port E is connected to the 4th valve port S, and when air-conditioning system heats, the first valve port D is connected to and second with third valve port E
Valve port C is connected to the 4th valve port S.
Gas-liquid separator 5 includes gas vent, first interface and second interface, and gas vent is connected with the second gas returning port,
First interface is connected with the second end of outdoor heat exchanger 3, and second interface is connected with the second end of indoor heat exchanger 7, first interface
Series connection first throttle unit 4, the second throttling unit of connecting between second interface and indoor heat exchanger 7 between outdoor heat exchanger 3
6。
Above-mentioned air-conditioning system further includes controller, which can be the functional unit being independently arranged, or with
The control panel that the control function component of other assemblies is arranged together in air-conditioning system.Specifically, which is used for: according to air-conditioning
The operating parameter of system determines the coolant throttle degree of first throttle unit 4 or the second throttling unit 7, and according to preset described
First throttle unit 4 and the second throttling unit 7 ratio value between the two, determine the second throttling unit 4 or first throttle unit 7
Coolant throttle degree.
Above-mentioned first throttle unit 4 and the second throttling unit 7 can be adjustable throttle valve, by changing cutting for valve passage
Area achievees the purpose that adjust pressure and flow.The adjusting of the throttle valve can be mechanical adjusting structure, or electromagnetism tune
Section structure.The coolant throttle degree is then the ratio of the channel cross-sectional area and unadjusted channel cross-sectional area after throttle valve adjustment, can
It is 0%~100%.When i.e. coolant throttle degree is 0, indicate that the throttle valve fully opens, refrigerant all passes through；Coolant throttle journey
When degree is 100%, indicate that the throttle valve completely closes, refrigerant does not allow to pass through.Aforementioned proportion value can be coolant throttle degree
Ratio value, or the corresponding scaled value of coolant throttle degree, such as opening value.
Preferably, above-mentioned first throttle unit 4 includes the first electric expansion valve, and the second throttling unit 7 includes the second electronics
Expansion valve, and above-mentioned coolant throttle degree is reflected by the aperture of electric expansion valve, i.e., in the electric expansion valve of same specification, opens
Degree is bigger, and coolant throttle degree is small；Aperture is smaller, and coolant throttle degree is bigger.
Preset ratio value is also aperture ratio value corresponding with coolant throttle degree.Since electric expansion valve belongs to electronics
Formula shaping modes not only ensure that restriction effect, but also greatly improve with the incomparable good characteristic of heating power expansion valve
Its performance, is particularly applied in air conditioner.It should be noted that above-mentioned aperture ratio value will be based on the same of electric expansion valve
One specification is compared, i.e. when the first electric expansion valve and the second electric expansion valve are same specification throttle valve, aperture ratio value
Embody the ratio value of coolant throttle degree.
The present invention, by the control to first throttle unit and the second throttling unit, realizes one in air-conditioning system operation
Grade reducing pressure by regulating flow and two-step throttle decompression, while by after the refrigerant progress gas-liquid separation after level-one reducing pressure by regulating flow, gas coolant follows
Second cylinder 12 of ring to compressor carries out circulation compression, the gas being flowed into the refrigerant of indoor heat exchanger 7 when reducing refrigeration
Body content, and the gas content being flowed into the refrigerant of outdoor heat exchanger 3 when heating is reduced, reduce gaseous coolant to work
For the influence of the heat exchange property of the indoor heat exchanger 7 or outdoor heat exchanger 3 of evaporator, so as to improve heat exchange efficiency, drop
Low compressor compression power consumption.
In order to achieve the above object, the present invention needs the throttling to first throttle unit and the second throttling unit to control, and
And the present invention, in throttling control, the throttle degree for not needing two throttling units calculates separately, but utilize two throttlings single
The throttling ratio value of member, as long as after the throttle opening of one throttling unit of acquisition, being obtained in addition according to throttling ratio value
The throttle opening of one throttling unit.It so can not only guarantee the operational energy efficiency of air-conditioning system, and make the air-conditioning system
Operation demand can quickly be met.
Further, compressor operating frequency or outdoor of the above-mentioned preset aperture ratio value according to the air-conditioning system
Environment temperature value, compressor does not return the most ratio of greater inequality of liquid when mainly serving for ensuring actual motion of the air-conditioning system under different operating conditions
Example value, to ensure system run all right and reliable.Specifically, above-mentioned preset ratio value value range can be [0.1,10].
For example, compressor operating frequency is higher, ratio value is bigger；Compressor operating frequency is lower, and ratio value is smaller.
Further, due to air-conditioning system be cold-warm type air-conditioning when, may operate under refrigeration mode or heating mode, and
The refrigerant circulation circuit of refrigeration mode and heating mode is opposite.In i.e. above-mentioned air-conditioning system, if air-conditioning system runs refrigeration mode
When, for the first electric expansion valve as level-one reducing pressure by regulating flow, the second electric expansion valve is two-step throttle decompression；If air-conditioning system is run
When heating mode, the second electric expansion valve is depressured as level-one reducing pressure by regulating flow, the first electric expansion valve as two-step throttle.Cause
This, in the present embodiment, above controller 8 is calculated when air-conditioning system runs refrigeration mode according to the operating parameter of air-conditioning system
The aperture of first electric expansion valve, and according to preset first aperture ratio value, adjust the aperture of the second electric expansion valve.It is above-mentioned
Controller 8 calculates opening for the second electric expansion valve when air-conditioning system runs heating mode, according to the operating parameter of air-conditioning system
Degree, and according to preset second aperture ratio value, adjust the aperture of the first electric expansion valve.
Specifically, the operating parameter of above-mentioned air-conditioning system may include the operation of the running frequency and air-conditioning system of compressor
Temperature, wherein the running temperature includes delivery temperature, outdoor environment temperature and the gas-liquid separator inlet temperature of compressor.
Wherein, the running frequency of the compressor can be read from the master control borad of air-conditioning system, and the delivery temperature of compressor can be by setting
The temperature sensor acquisition in the exhaust outlet of compressor is set, outdoor environment temperature can be passed by the temperature being arranged on outdoor unit
Sensor obtains, and gas-liquid separator inlet temperature can be obtained by the temperature sensor being arranged on gas-liquid separator inlet tube.
In addition, the running frequency of above-mentioned compressor may include the current operation frequency or frequency change of compressor.For example, periodically
The running frequency that compressor is read from the master control borad of air-conditioning system, then calculates the ratio of the running frequency of adjacent compressor twice
Example value, obtains frequency change.Above-mentioned running temperature may also comprise current temperature value or temperature change value.
In the embodiment of the present invention, summation can be weighted according to the operating parameter of air-conditioning system, it is swollen to obtain the first electronics
The aperture of swollen valve.For example, aperture=A1 × frequency+B1 × environment temperature+C1 × exhaust gas temperature change of the first electric expansion valve
Difference.Wherein A1, B1, C1 are the fixed weight coefficient prestored in air-conditioning system, can set multiple groups weight coefficient, according to not
With operating condition and be correspondingly arranged.
It should be noted that the flow restriction control of above-mentioned electric expansion valve, can periodically obtain the operation of air-conditioning system
Parameter, and be adjusted according to operating parameter；Whether the operating parameter that air-conditioning system can also be monitored changes, if becoming
Change, is then adjusted according to the operating parameter after variation.
Accordingly, the present invention also provides a kind of control methods of air-conditioning system.As shown in Fig. 2, the control of the air-conditioning system
Method processed the following steps are included:
Step S10, during operation of air conditioner, the operating parameter of air-conditioning system is obtained；
Specifically, the operating parameter of above-mentioned air-conditioning system may include the operation of the running frequency and air-conditioning system of compressor
Temperature, wherein the running temperature includes delivery temperature, outdoor environment temperature, the gas-liquid separator inlet temperature of compressor.Its
In, the running frequency of the compressor can be read from the master control borad of air-conditioning system, and the delivery temperature of compressor can pass through setting
It is obtained in the temperature sensor of the exhaust outlet of compressor, outdoor environment temperature can be by the temperature sensing that is arranged on outdoor unit
Device obtains, and gas-liquid separator inlet temperature can be obtained by the temperature sensor being arranged on gas-liquid separator inlet tube.Separately
Outside, the running frequency of above-mentioned compressor may include the current operation frequency or frequency change of compressor.For example, periodically from
The running frequency that compressor is read in the master control borad of air-conditioning system, then calculates the ratio of the running frequency of adjacent compressor twice
Value obtains frequency change.Above-mentioned running temperature may also comprise current temperature value or temperature change value.
Step S20, the refrigerant section of first throttle unit or the second throttling unit is calculated according to the operating parameter of air-conditioning system
Process degree, and the ratio value between the two according to the preset first throttle unit and the second throttling unit determine described
The coolant throttle degree of two throttling units or first throttle unit；
In the present embodiment, above-mentioned first throttle unit includes the first electric expansion valve, and the second throttling unit includes the second electricity
Sub- expansion valve.Due to air-conditioning system be cold-warm type air-conditioning when, may operate under refrigeration mode or heating mode, and refrigeration mode
It is opposite with the refrigerant circulation circuit of heating mode.In i.e. above-mentioned air-conditioning system, if air-conditioning system runs refrigeration mode, the first electricity
For sub- expansion valve as level-one reducing pressure by regulating flow, the second electric expansion valve is two-step throttle decompression；If air-conditioning system runs heating mode
When, the second electric expansion valve is depressured as level-one reducing pressure by regulating flow, the first electric expansion valve as two-step throttle.Therefore, this implementation
In example, it is swollen that above controller calculates the first electronics when air-conditioning system runs refrigeration mode, according to the operating parameter of air-conditioning system
The aperture of swollen valve, and according to preset first aperture ratio value, adjust the aperture of the second electric expansion valve.Above controller is in sky
When adjusting system runs heating mode, the aperture of the second electric expansion valve is calculated according to the operating parameter of air-conditioning system, and according to pre-
If the second aperture ratio value, adjust the first electric expansion valve aperture.
Above-mentioned preset aperture ratio value is according to the compressor operating frequency or outdoor environment temperature of the air-conditioning system
Value, compressor does not return the best proportion value of liquid when mainly serving for ensuring actual motion of the air-conditioning system under different operating conditions, with
Ensure system run all right and reliable.Specifically, above-mentioned preset ratio value value range can be [0.1,10].For example, pressure
Contracting machine running frequency is higher, and ratio value is bigger；Compressor operating frequency is lower, and ratio value is smaller.
Step S30, according to the coolant throttle extent control first of identified first throttle unit and the second throttling unit
Throttling unit and the second throttling unit.
Specifically, the throttling control with the throttling of the second throttling unit control of above-mentioned first throttle unit be synchronously control or
Successively control.
After determining the coolant throttle degree of first throttle unit and the second throttling unit, then first segment can be controlled simultaneously
Unit and the second throttling unit are flowed, i.e., sends throttle control signal to first throttle unit and the second throttling unit simultaneously.Alternatively,
It can successively control, i.e., first control the coolant throttle degree of first throttle unit, then control the coolant throttle of the second throttling unit
Degree.
The technical solution of the present invention present invention first determines the cold of a throttling unit according to air conditioner operation parameters in throttling control
Matchmaker's throttle degree determines the coolant throttle degree of another throttling unit further according to preset ratio value, because saving without two
The throttle degree of stream unit calculates separately, using the throttling ratio of two throttling units, as long as obtaining the section of a throttling unit
After flowing aperture, the throttle opening of another throttling unit is obtained with according to throttling ratio value.So can not only it guarantee
The operational energy efficiency of air-conditioning system, and the air-conditioning system is allowed quickly to meet operation demand.
In one embodiment, referring to Fig. 3, on the basis of embodiment shown in Fig. 2, after the step S30 further include:
Step S40, it in the operating parameter variation of the air-conditioning system, is calculated simultaneously according to the operating parameter after variation again
Determine the coolant throttle degree of first throttle unit and the second throttling unit.
In the present embodiment, when the running frequency for periodically reading compressor from the master control borad of air-conditioning system, current temperature
When angle value or temperature change value, if finding, a certain operating parameter sends variation, again according to the operating parameter meter after variation
Calculate and determine the coolant throttle degree of first throttle unit and the second throttling unit.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all at this
Under the inventive concept of invention, using equivalent structure transformation made by description of the invention and accompanying drawing content, or directly/use indirectly
It is included in other related technical areas in scope of patent protection of the invention.
Claims (9)
1. a kind of air-conditioning system, the compressor of the twin-tub independent compression including being sequentially connected and being formed refrigerant circulation circuit, commutation
Unit, outdoor heat exchanger, first throttle unit, gas-liquid separator, the second throttling unit, indoor heat exchanger；It is characterized in that, institute
Stating air-conditioning system further includes controller, and the controller calculates first throttle unit or second according to the operating parameter of air-conditioning system
The coolant throttle degree of throttling unit, and the ratio between the two according to the preset first throttle unit and the second throttling unit
Example value, determines the coolant throttle degree of second throttling unit or first throttle unit.
2. air-conditioning system as described in claim 1, which is characterized in that the first throttle unit includes the first electronic expansion
Valve, second throttling unit include the second electric expansion valve, and the preset ratio value is corresponding with coolant throttle degree
Aperture ratio value.
3. air-conditioning system as claimed in claim 2, which is characterized in that the value range of the aperture ratio value be [0.1,
10]。
4. air-conditioning system as described in claim 1, which is characterized in that the operating parameter of the air-conditioning system includes compressor
The running temperature of running frequency and air-conditioning system, wherein the running temperature includes the delivery temperature of compressor, outdoor environment
Temperature.
5. air-conditioning system as claimed in claim 4, which is characterized in that the running frequency of the compressor includes working as compressor
Preceding running frequency or frequency change.
6. air-conditioning system as claimed in claim 4, which is characterized in that the running temperature includes current temperature value or temperature
Changing value.
7. a kind of control method of air-conditioning system, which comprises the following steps:
During operation of air conditioner, the operating parameter of air-conditioning system is obtained；
According to the coolant throttle degree of the operating parameter of air-conditioning system calculating first throttle unit or the second throttling unit, and according to
The preset first throttle unit and the second throttling unit ratio value between the two, determine second throttling unit or
The coolant throttle degree of one throttling unit；
According to the coolant throttle extent control first throttle unit of the identified first throttle unit and the second throttling unit
With the second throttling unit.
8. the control method of air-conditioning system as claimed in claim 7, which is characterized in that the throttling control of the first throttle unit
The throttling control of system and the second throttling unit is synchronously control or successively control.
9. the control method of air-conditioning system as claimed in claim 7, which is characterized in that in the operating parameter of the air-conditioning system
When variation, the coolant throttle of first throttle unit and the second throttling unit is calculated and determined according to the operating parameter after variation again
Degree.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610867627.6A CN106352585B (en) | 2016-09-29 | 2016-09-29 | Air-conditioning system and its control method |
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| CN201610867627.6A CN106352585B (en) | 2016-09-29 | 2016-09-29 | Air-conditioning system and its control method |
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| CN106352585B true CN106352585B (en) | 2019-01-08 |
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| CN111609587B (en) * | 2020-04-24 | 2021-06-04 | 珠海格力电器股份有限公司 | Double-temperature air conditioning system, control method and air conditioner |
| CN111609582B (en) * | 2020-04-24 | 2021-06-04 | 珠海格力电器股份有限公司 | Dual-temperature air conditioning system, control method and air conditioner |
| CN111609593B (en) * | 2020-04-24 | 2021-06-25 | 珠海格力电器股份有限公司 | Double-temperature air conditioning system, control method and air conditioner |
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