CN106352585A - Air-conditioning system and control method thereof - Google Patents

Air-conditioning system and control method thereof Download PDF

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Publication number
CN106352585A
CN106352585A CN201610867627.6A CN201610867627A CN106352585A CN 106352585 A CN106352585 A CN 106352585A CN 201610867627 A CN201610867627 A CN 201610867627A CN 106352585 A CN106352585 A CN 106352585A
Authority
CN
China
Prior art keywords
conditioning system
unit
air conditioning
throttle
throttling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610867627.6A
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Chinese (zh)
Other versions
CN106352585B (en
Inventor
黄勇
刘湍顺
戚文端
杨亚新
陈明瑜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea Refrigeration Equipment Co Ltd
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Publication date
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Priority to CN201610867627.6A priority Critical patent/CN106352585B/en
Publication of CN106352585A publication Critical patent/CN106352585A/en
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Publication of CN106352585B publication Critical patent/CN106352585B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/40Fluid line arrangements

Abstract

The invention discloses an air-conditioning system. The air-conditioning system comprises a compressor with two interdependently compressing cylinders, a reversing unit, an indoor heat exchanger, a first throttling unit, a gas-liquid separator, a second throttling unit and an indoor heat exchanger which are sequentially connected to form a refrigerant circulating loop and is characterized by further comprising a controller, the controller calculates the refrigerant throttling degrees of the first throttling unit and the second throttling unit according to the operating parameters of the air-conditioning system and determines the refrigerant throttling degree of the second throttling unit or the first throttling unit according to the proportion value between the first throttling unit and the second throttling unit. The invention further discloses a control method of the air-conditioning system. The operating energy effect of the air-conditioning system can be ensure, and the air-conditioning system can rapidly meet the operating demand.

Description

Air conditioning system and its control method
Technical field
The present invention relates to air-conditioning technical field, particularly to a kind of air conditioning system and its control method.
Background technology
Current air conditioning system not to after throttling and enter the gaseous refrigerant before vaporizer and be optimized cyclic design, Lead to gaseous refrigerant impact evaporator heat exchange performance, and increase compressor compresses power consumption, thus having influence on energy efficiency of air conditioner Level.
Although, air injection enthalpy-increasing and twin-tub compress technique can improve heating capacity under low temperature and ultralow temperature for the air conditioning system Level, but in the control of air conditioning system, in order to ensure normal operation and the operational energy efficiency of air conditioning system, throttling arrangement Flow restriction control is of crucial importance, such as, when air conditioning system runs refrigeration mode, by first throttle device, outdoor heat exchanger is circulated The coolant going out carries out a reducing pressure by regulating flow, carries out second throttle fall by the coolant 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, air-conditioning so cannot be ensured The operational energy efficiency of system.
Content 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 air conditioning system carries out independent control It is ensured that the operational energy efficiency of air conditioning system during system throttling.
For achieving the above object, a kind of air conditioning system proposed by the present invention, returns including being sequentially connected and forming refrigerant circulation The compressor of twin-tub independent compression on road, reversing unit, outdoor heat exchanger, first throttle unit, gas-liquid separator, the second throttling Unit, indoor heat exchanger;Described air conditioning system also includes controller, and described controller calculates according to the operational factor of air conditioning system The coolant throttle degree of first throttle unit or the second throttling unit, and according to default described first throttle unit and second section Stream unit ratio value therebetween, determines the coolant throttle degree of described second throttling unit or first throttle unit.
Preferably, described first throttle unit includes the first electric expansion valve, and described second throttling unit includes the second electricity Sub- expansion valve, described default ratio value is aperture ratio value corresponding with coolant throttle degree.
Preferably, the span of described aperture ratio value is [0.1,10].
Preferably, the operational factor of described air conditioning system includes the running frequency of compressor and the operation temperature of air conditioning system Degree, wherein said running temperature includes the delivery temperature of compressor, outdoor environment temperature.
Preferably, the running frequency of described compressor includes current operation frequency or the frequency change of compressor.
Preferably, described running temperature includes current temperature value or temperature change value.
For achieving the above object, the present invention also provides a kind of control method of air conditioning system, comprises the following steps:
During operation of air conditioner, obtain the operational factor of air conditioning system;
Operational factor according to air conditioning system calculates the coolant throttle degree of first throttle unit or the second throttling unit, and According to default described first throttle unit and the second throttling unit ratio value therebetween, determine described second throttling unit Or the coolant throttle degree of first throttle unit;
According to determined by described first throttle unit and the second throttling unit coolant throttle extent control first throttle Unit and the second throttling unit.
Preferably, the throttling of described first throttle unit control with the throttling of the second throttling unit be controlled to Synchronization Control or Successively control.
Preferably, when the operational factor of described air conditioning system changes, again calculated simultaneously according to the operational factor after change Determine the coolant throttle degree of first throttle unit and the second throttling unit.
Air conditioning system and its control method that the present invention provides, first determine the cold of a throttling unit according to air conditioner operation parameters Matchmaker's throttle degree, further according to default first throttle unit and the second throttling unit ratio value therebetween, determines another section The coolant throttle degree of stream unit, because the throttle degree without two throttling unit calculates respectively, single using two throttlings In addition the throttling ratio value of unit, as long as after the throttle opening of one throttling unit of acquisition, be obtained with according to throttling ratio value The throttle opening of one throttling unit.So, not only can ensure that the operational energy efficiency of air conditioning system, and make this air conditioning system Operation demand can quickly be met.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description be only this Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable Structure according to these accompanying drawings obtains other accompanying drawings.
Fig. 1 is the structural representation of air conditioning system one embodiment of the present invention;
Fig. 2 is the schematic flow sheet of control method one embodiment of air conditioning system of the present invention;
Fig. 3 is the schematic flow sheet of control method two embodiment of air conditioning system of the present invention.
Drawing reference numeral illustrates:
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 realization of the object of the invention, functional characteristics and advantage will be described further in conjunction with the embodiments referring to the drawings.
Specific embodiment
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 clear, complete Site preparation description is it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Base Embodiment in the present invention, those of ordinary skill in the art obtained under the premise of not making creative work all its His embodiment, broadly falls into the scope of protection of the invention.
If it is to be appreciated that being related to directivity instruction (such as up, down, left, right, before and after ...) in the embodiment of the present invention, It is only used for explaining the relative position relation between each part, motion conditions etc. under a certain particular pose (as shown in drawings), If this particular pose changes, directionality instruction also correspondingly changes therewith.
If in addition, being related to the description of " first ", " second " etc. in the present invention, it is only used for describing purpose, and can not It is interpreted as indicating or imply its relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the One ", the feature of " second " can be expressed or implicitly include at least one this feature.In addition, the skill between each embodiment Art scheme can be combined with each other, but must be capable of by those of ordinary skill in the art based on, when technical scheme In conjunction with occurring conflicting or will be understood that the combination of this technical scheme does not exist when cannot realize, also not in application claims Protection domain within.
Refer to Fig. 1, air conditioning system provided by the present invention, comprising: the twin-tub being sequentially communicated and being formed coolant loop is only The compressor 1 of vertical compression, reversing unit 2, outdoor heat exchanger 3, first throttle unit 4, gas-liquid separator 5, the second throttling unit 6th, indoor heat exchanger 7.Wherein compressor 1 includes housing, is provided with the first cylinder 11 and the second cylinder 12, housing peripheral hardware in this housing There are the first fluid reservoir 13 and the second fluid reservoir 14.The air vent being connected with reversing unit 2 and are additionally provided with compressor 1 housing First gas returning port of the air entry connection of one cylinder 11, and the second gas returning port connecting with the air entry of the second cylinder 12.The One liquid storage is filled 13 one end and is connected with reversing unit 2, and the other end is connected with the first gas returning port;Second liquid storage is filled 14 one end and is divided with gas-liquid From gas outlet's connection of device 5, the other end is connected with the second gas returning port.It is understood that this second liquid storage filling 14 can also Omit.It is communicated with the stability that the second fluid reservoir 14 is to improve air conditioning system further in the second gas returning port.
This air-conditioning passes through the independent compression of the first cylinder 11 and the second cylinder 12, after the compression that the first cylinder 11 is discharged Coolant and the coolant after the compression that the second cylinder 12 is discharged are drained into respectively in housing 1 and then discharge from air vent.In addition, gas The gas outlet of liquid/gas separator 5 directly connects the gas returning port of compressor 1, is divided by gas-liquid through the coolant of first throttle unit 4 After device 5, the second cylinder 12 circulation of gas outlet to the compressor 1 through gas-liquid separator 5 for the gaseous coolant is compressed, and reduces pressure Contracting power consumption, improving energy efficiency.
Specifically, the span of the delivery space ratio of above-mentioned second cylinder 12 and the first cylinder 11 is 1%~10%. Further, the span of the delivery space ratio of the second cylinder 12 and the first cylinder 11 is 1%~9% it is preferable that second The span 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 parameter such as 4%, 5%, 8% or 8.5%.
Above-mentioned reversing unit 2 is preferably cross valve, and it is passed through the first liquid storage filling 13 and is connected with 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 with one of in the second valve port c and the 3rd valve port e, and Four valve port s are connected with another in the second valve port c and described 3rd valve port e, the air vent 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 the 3rd valve port e.Specifically, when heating and air conditioner 100 is freezed, the first valve port d and the second valve port c is even Logical and the 3rd valve port e is connected with the 4th valve port s, and when air conditioning system heats, the first valve port d is connected with the 3rd valve port e and second Valve port c is connected with the 4th valve port s.
Gas-liquid separator 5 includes gas outlet, first interface and second interface, and gas outlet 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 and outdoor heat exchanger 3 between 6.
Above-mentioned air conditioning system also includes controller, this controller can for the functional unit that is independently arranged or with The panel that in air conditioning system, the control function assembly of other assemblies is arranged together.Specifically, this controller is used for: according to air-conditioning The operational factor of system determines first throttle unit 4 or the coolant throttle degree of the second throttling unit 7, and according to default described First throttle unit 4 and the second throttling unit 7 ratio value therebetween, determines 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 choke valve, by changing cutting of valve passage Area adjusts the purpose of pressure and flow to reach.The regulation of this choke valve can be mechanical adjusting structure or electromagnetism is adjusted Nodule structure.This coolant throttle degree then ratio for the channel cross-sectional area after throttle valve adjustment and unadjusted channel cross-sectional area, can For 0%~100%.When i.e. coolant throttle degree is 0, represent that this choke valve fully opens, coolant all passes through;Coolant throttle journey When spending for 100%, represent that this choke valve completely closes, coolant 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 the aperture reflection by electric expansion valve for the above-mentioned coolant throttle degree, that is, in the electric expansion valve of same specification, leave Degree is bigger, and coolant throttle degree is little;Aperture is less, and coolant throttle degree is bigger.
Default ratio value is also aperture ratio value corresponding with coolant throttle degree.Because electric expansion valve belongs to electronics Formula shaping modes, have the incomparable good characteristic of heating power expansion valve, not only ensure that restriction effect, but also greatly improve Its performance, is particularly applied in air-conditioner.It should be noted that above-mentioned aperture ratio value is same based on electric expansion valve One specification is compared, when that is, the first electric expansion valve and the second electric expansion valve are same specification choke valve, aperture ratio value Embody the ratio value of coolant throttle degree.
The present invention, in air conditioning system operation, by the control to first throttle unit and the second throttling unit, realizes one Level reducing pressure by regulating flow and two-step throttle blood pressure lowering, are carried out the coolant after one-level reducing pressure by regulating flow after gas-liquid separation, gas coolant follows simultaneously Ring is circulated compression to the second cylinder 12 of compressor, reduces the gas being flowed in the coolant of indoor heat exchanger 7 during refrigeration Body burden, and reduce the gas content being flowed in the coolant of outdoor heat exchanger 3 when heating, decrease gaseous coolant to work The impact of the heat exchange property of the indoor heat exchanger 7 for vaporizer or outdoor heat exchanger 3, such that it is able to improve heat exchange efficiency, fall Low compression machine 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 it is not necessary to the throttle degree of two throttling unit calculates respectively, but single using two throttlings In addition the throttling ratio value of unit, as long as after the throttle opening of one throttling unit of acquisition, be obtained with according to throttling ratio value The throttle opening of one throttling unit.So not only can ensure that the operational energy efficiency of air conditioning system, and make this air conditioning system Operation demand can quickly be met.
Further, above-mentioned default aperture ratio value is according to the compressor operating frequency of described air conditioning system or outdoor Ambient temperature value, when mainly serving for ensuring actual motion under different operating modes for the air conditioning system, compressor does not return the ratio of greater inequality of liquid Example value, to guarantee system run all right and reliability.Specifically, above-mentioned default ratio value span can be [0.1,10]. For example, compressor operating frequency is higher, and ratio value is bigger;Compressor operating frequency is lower, and ratio value is less.
Further, due to air conditioning system for 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 contrary.I.e. in above-mentioned air conditioning system, if air conditioning system runs refrigeration mode When, as one-level reducing pressure by regulating flow, the second electric expansion valve is two-step throttle blood pressure lowering to the first electric expansion valve;If air conditioning system is run During heating mode, as one-level reducing pressure by regulating flow, the first electric expansion valve is as two-step throttle blood pressure lowering for the second electric expansion valve.Cause This, in the present embodiment, when air conditioning system runs refrigeration mode, the operational factor according to air conditioning system calculates controller noted above 8 The aperture of the first electric expansion valve, and according to default first aperture ratio value, adjust the aperture of the second electric expansion valve.Above-mentioned When air conditioning system runs heating mode, the operational factor according to air conditioning system calculates opening of the second electric expansion valve to controller 8 Degree, and according to default second aperture ratio value, adjust the aperture of the first electric expansion valve.
Specifically, the operational factor of above-mentioned air conditioning system may include the running frequency of compressor and the operation of air conditioning system Temperature, wherein said running temperature includes delivery temperature, outdoor environment temperature and the gas-liquid separator inlet temperature of compressor. Wherein, the running frequency of this compressor can read from the master control borad of air conditioning system, and the delivery temperature of compressor can be by setting Put the temperature sensor in the air vent of compressor to obtain, outdoor environment temperature can be passed by the temperature being disposed in the outdoor on machine 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 current operation frequency or the frequency change of compressor.For example, periodically Read the running frequency of compressor from the master control borad of air conditioning system, then calculate 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, can be weighted suing for peace, obtain the first electronics swollen according to the operational factor of air conditioning system The aperture of swollen valve.For example, the aperture=a1 × frequency+b1 × ambient temperature+c1 × exhaust gas temperature change of the first electric expansion valve Difference.Wherein a1, b1, c1 are the fixed weight coefficient prestoring in air conditioning system, can set multigroup weight coefficient, with 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 operational factor;Whether the operational factor that air conditioning system can also be monitored changes, if becoming Change, be then adjusted according to the operational factor after change.
Accordingly, present invention also offers a kind of control method of air conditioning system.As shown in Fig. 2 the control of this air conditioning system Method processed comprises the following steps:
During step s10, operation of air conditioner, obtain the operational factor of air conditioning system;
Specifically, the operational factor of above-mentioned air conditioning system may include the running frequency of compressor and the operation of air conditioning system Temperature, wherein said running temperature includes the delivery temperature of compressor, outdoor environment temperature, gas-liquid separator inlet temperature.Its In, the running frequency of this compressor can read from the master control borad of air conditioning system, and the delivery temperature of compressor can be by setting Obtain in the temperature sensor of the air vent of compressor, outdoor environment temperature can be by the temperature sensing being disposed in the outdoor on machine Device obtains, and gas-liquid separator inlet temperature can be obtained by the temperature sensor being arranged on gas-liquid separator inlet tube.Separately Outward, the running frequency of above-mentioned compressor may include current operation frequency or the frequency change of compressor.For example, periodically from Read the running frequency of compressor in the master control borad of air conditioning system, then calculate 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, calculate the coolant section of first throttle unit or the second throttling unit according to the operational factor of air conditioning system Flow process degree, and the ratio value therebetween according to default described first throttle unit and the second throttling unit, determine described The coolant throttle degree of two throttling unit 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.During due to air conditioning system for cold-warm type air-conditioning, may operate under refrigeration mode or heating mode, and refrigeration mode Contrary with the refrigerant circulation circuit of heating mode.I.e. in above-mentioned air conditioning system, if air conditioning system runs refrigeration mode, the first electricity As one-level reducing pressure by regulating flow, the second electric expansion valve is two-step throttle blood pressure lowering to sub- expansion valve;If air conditioning system runs heating mode When, as one-level reducing pressure by regulating flow, the first electric expansion valve is as two-step throttle blood pressure lowering for the second electric expansion valve.Therefore, this enforcement In example, when air conditioning system runs refrigeration mode, it is swollen that the operational factor according to air conditioning system calculates the first electronics to controller noted above The aperture of swollen valve, and according to default first aperture ratio value, adjust the aperture of the second electric expansion valve.Controller noted above is in sky When adjusting system runs heating mode, the operational factor according to air conditioning system calculates the aperture of the second electric expansion valve, and according to pre- If the second aperture ratio value, adjustment the first electric expansion valve aperture.
Above-mentioned default aperture ratio value is according to the compressor operating frequency of described air conditioning system or outdoor environment temperature Value, when mainly serving for ensuring actual motion under different operating modes for the air conditioning system, compressor does not return the best proportion value of liquid, with Guarantee system run all right and reliability.Specifically, above-mentioned default ratio value span can be [0.1,10].For example, press Contracting machine running frequency is higher, and ratio value is bigger;Compressor operating frequency is lower, and ratio value is less.
Step s30, according to determined by first throttle unit and the second throttling unit coolant throttle extent control first Throttling unit and the second throttling unit.
Specifically, the throttling of above-mentioned first throttle unit control with the throttling of the second throttling unit be controlled to Synchronization Control or Successively control.
After determining the coolant throttle degree of first throttle unit and the second throttling unit, then can control first segment simultaneously Stream unit and the second throttling unit, send throttle control signal to first throttle unit and the second throttling unit simultaneously.Or, Can successively control, first control the coolant throttle degree of first throttle unit, then the coolant throttle controlling the second throttling unit Degree.
The technical solution of the present invention present invention, in throttling control, first determines the cold of a throttling unit according to air conditioner operation parameters Matchmaker's throttle degree, determines the coolant throttle degree of another throttling unit further according to default ratio value, because saving without two The throttle degree of stream unit calculates respectively, using the throttling ratio of two throttling unit, as long as obtaining the section of a throttling unit After stream aperture, it is obtained with the throttle opening of another one throttling unit according to throttling ratio value.So not only can ensure that The operational energy efficiency of air conditioning system, and allow this air conditioning system quickly to meet operation demand.
In one embodiment, with reference to Fig. 3, on the basis of the embodiment shown in Fig. 2, also include after described step s30:
Step s40, described air conditioning system operational factor change when, again according to change after operational factor calculate simultaneously Determine the coolant throttle degree of first throttle unit and the second throttling unit.
In the present embodiment, when periodically from the master control borad of air conditioning system read compressor running frequency, currently temperature When angle value or temperature change value, if finding, a certain operational factor sends change, again according to the operational factor meter after change Calculate and determine the coolant throttle degree of first throttle unit and the second throttling unit.
The foregoing is only the preferred embodiments of the present invention, not thereby limit the present invention the scope of the claims, every this Under the inventive concept of invention, the equivalent structure transformation made using description of the invention and accompanying drawing content, or directly/indirectly use In the scope of patent protection that other related technical fields are included in the present invention.

Claims (9)

1. a kind of air conditioning system, including being sequentially connected and form the compressor of twin-tub independent compression of 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 State air conditioning system and also include controller, described controller calculates first throttle unit or second according to the operational factor of air conditioning system The coolant throttle degree of throttling unit, and the ratio therebetween according to default described first throttle unit and the second throttling unit Example value, determines the coolant throttle degree of described second throttling unit or first throttle unit.
2. air conditioning system as claimed in claim 1 is it is characterised in that described first throttle unit includes the first electronic expansion Valve, described second throttling unit includes the second electric expansion valve, and described default ratio value is corresponding with coolant throttle degree Aperture ratio value.
3. air conditioning system as claimed in claim 2 it is characterised in that described aperture ratio value span be [0.1, 10].
4. air conditioning system as claimed in claim 1 is it is characterised in that the operational factor of described air conditioning system includes compressor Running frequency and the running temperature of air conditioning system, wherein said running temperature includes the delivery temperature of compressor, outdoor environment Temperature.
5. air conditioning system as claimed in claim 4 is it is characterised in that the running frequency of described compressor includes working as of compressor Front running frequency or frequency change.
6. air conditioning system as claimed in claim 4 is it is characterised in that described running temperature includes current temperature value or temperature Changing value.
7. a kind of control method of air conditioning system is it is characterised in that comprise the following steps:
During operation of air conditioner, obtain the operational factor of air conditioning system;
Operational factor according to air conditioning system calculates the coolant throttle degree of first throttle unit or the second throttling unit, and according to Default described first throttle unit and the second throttling unit ratio value therebetween, determines described second throttling unit or The coolant throttle degree of one throttling unit;
According to determined by described first throttle unit and the second throttling unit coolant throttle extent control first throttle unit With the second throttling unit.
8. the control method of air conditioning system as claimed in claim 7 is it is characterised in that the throttling control of described first throttle unit System is controlled to Synchronization Control or successively control with the throttling of the second throttling unit.
9. the control method of air conditioning system as claimed in claim 7 is it is characterised in that operational factor in described air conditioning system During change, again first throttle unit and the coolant throttle of the second throttling unit are calculated and determined according to the operational factor after change Degree.
CN201610867627.6A 2016-09-29 2016-09-29 Air-conditioning system and its control method Active CN106352585B (en)

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CN111609586A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609591A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609582A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Dual-temperature air conditioning system, control method and air conditioner
CN111609593A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609587A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609592A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Dual-temperature air conditioning system, control method and air conditioner
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CN111609587A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609592A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Dual-temperature air conditioning system, control method and air conditioner
CN111609589A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609584A (en) * 2020-04-24 2020-09-01 珠海格力电器股份有限公司 Dual-temperature air conditioning system, control method and air conditioner
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CN111609589B (en) * 2020-04-24 2021-07-06 珠海格力电器股份有限公司 Double-temperature air conditioning system, control method and air conditioner
CN111609592B (en) * 2020-04-24 2021-07-13 珠海格力电器股份有限公司 Dual-temperature air conditioning system, control method and air conditioner
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