CN109595850A - Control method and air-conditioning system - Google Patents

Control method and air-conditioning system Download PDF

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Publication number
CN109595850A
CN109595850A CN201910016336.XA CN201910016336A CN109595850A CN 109595850 A CN109595850 A CN 109595850A CN 201910016336 A CN201910016336 A CN 201910016336A CN 109595850 A CN109595850 A CN 109595850A
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CN
China
Prior art keywords
conditioning
air
opened
pressure
heat exchanger
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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.)
Pending
Application number
CN201910016336.XA
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Chinese (zh)
Inventor
郑春元
周文杰
杨国忠
王命仁
谭志军
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
Guangdong Midea HVAC Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Guangdong Midea HVAC Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201910016336.XA priority Critical patent/CN109595850A/en
Publication of CN109595850A publication Critical patent/CN109595850A/en
Pending legal-status Critical Current

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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, plant 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
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/87Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • 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
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/025Compression machines, plant, or systems with reversible cycle not otherwise provided for using multiple outdoor units
    • 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
    • F25B2313/00Compression machines, plant, or systems with reversible cycle not otherwise provided for
    • F25B2313/031Sensor arrangements
    • F25B2313/0313Pressure sensors near the outdoor heat exchanger

Abstract

The invention discloses a kind of control method and air-conditioning systems.Air-conditioning system includes multiple outdoor units, each outdoor unit includes at least one external heat exchanger, control method includes: when air-conditioning system is run in a chiller mode, the booting capacity of outdoor environment temperature and air-conditioning system is obtained, or obtains the booting capacity of outdoor environment temperature, indoor environment temperature and air-conditioning system;The quantity that outdoor unit is opened and the quantity that external heat exchanger is opened are determined according to the booting capacity of outdoor environment temperature and air-conditioning system, or according to the booting capacity of outdoor environment temperature, indoor environment temperature and air-conditioning system, and control outdoor unit and external heat exchanger unlatching;With the pressure at expulsion for obtaining air-conditioning system, the quantity that outdoor unit is opened and the quantity that external heat exchanger is opened are adjusted according to the relationship of pressure at expulsion and default pressure at expulsion.The too low problem of high pressure caused by avoiding air-conditioning system from mismatching because of condensing pressure and evaporating pressure reduces the fluctuation of air-conditioning system state, guarantees that air-conditioning system is reliable, stable operation.

Description

Control method and air-conditioning system
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of control method and air-conditioning system.
Background technique
In the related art, environment temperature is high indoors sometimes, outdoor environment temperature is (- 25 DEG C~0 DEG C low for air-conditioning system Or temperature is lower) operating condition under run, such as the places such as communication base station, exclusive restaurant, bakery, hotel, dance hall, interior have greatly It is high that calorimetric source makes indoor circumstance temperature degree, and there is particular/special requirement in these places to the quality of room air, cannot be empty by outdoor low temperature Gas is introduced directly into interior to reduce indoor temperature, and air-conditioning system is needed to freeze indoors.However, at low ambient temperatures, changing outside The heat transfer temperature difference of hot device is big, is easy to appear practical condensation effect and evaporation effect mismatches the too low problem of caused high pressure.Cause This, existing air-conditioning system is only capable of freezing in the range of outdoor temperature is at 7 DEG C~43 DEG C, can not be -25 DEG C in outdoor temperature ~0 DEG C or when lower temperature, freeze.
Specifically, when more outdoor unit parallel connections carry out cryogenic refrigeration, the heat transfer temperature difference of external heat exchanger is big, and condensation effect is good, In system starting, after defrost or oil return, the quantity for occurring running due to outdoor unit is tended to, external heat exchanger quantity is not When causing condensation effect and indoor unit evaporation effect to mismatch, cause height to force down, system is ultimately at the state of few refrigerant.? In operational process, due to the variation that system can need, the unlatching quantity of outdoor unit number of units can be varied, at this time can be in face of few heat exchange Device, can bring system shock to the switching of more heat exchangers.Current air-conditioning system mostly according to can need size come to operation platform Number is controlled, and does not consider specific system mode, therefore is easy to appear practical condensation effect and evaporation effect mismatch The too low problem of caused high pressure.Such problems is prevalent in the process that system carries out heat exchanger switching according to workload demand In the middle.
To sum up, existing air-conditioning system has following problems when freezing parallel running: being easy to cause outer heat exchange when 1) starting Integrity problem caused by device condensing capacity and evaporability seriously mismatch;2) in operational process, only according to indoor function need Size run the determination of outer board number, on the one hand can cause the huge fluctuation of system mode, on the other hand can equally hold System operation reliability problem caused by easily causing condensing capacity and evaporability to mismatch.
Summary of the invention
Embodiments of the present invention provide a kind of control method and air-conditioning system.
The control method of embodiments of the present invention is used for air-conditioning system, and the air-conditioning system includes multiple outdoor units, often A outdoor unit includes at least one external heat exchanger, and the control method includes:
When the air-conditioning system is run in a chiller mode, the booting for obtaining outdoor environment temperature and the air-conditioning system is held Amount, or obtain the booting capacity of the outdoor environment temperature, indoor environment temperature and the air-conditioning system;
According to the booting capacity of the outdoor environment temperature and the air-conditioning system, or according to the outdoor environment temperature, The indoor environment temperature and the booting capacity of the air-conditioning system determine the quantity and the outer heat exchange that the outdoor unit is opened The quantity that device is opened, and control the outdoor unit and external heat exchanger unlatching;With
The pressure at expulsion for obtaining the air-conditioning system controls institute according to the relationship of the pressure at expulsion and default pressure at expulsion The quantity that the quantity and the external heat exchanger for stating outdoor unit unlatching are opened.
In the control method of above embodiment, when air-conditioning system is opened, according to outdoor environment temperature and air-conditioning system Booting capacity and/or indoor environment temperature determine the quantity that outdoor unit and external heat exchanger are opened, avoid air-conditioning system because of condensation The too low problem of high pressure caused by pressure and evaporating pressure mismatch, increases the reliability of air-conditioning system.It is run in air-conditioning system In the process, the quantity that outdoor unit and external heat exchanger are opened can be adjusted according to the pressure at expulsion of air-conditioning system, can reduce sky in this way The fluctuation of adjusting system state guarantees air-conditioning system reliability of operation and stability.
In some embodiments, according to the outdoor environment temperature and the determination of the booting capacity of the air-conditioning system The quantity that the quantity and the external heat exchanger that outdoor unit is opened are opened, and control what the outdoor unit and the external heat exchanger were opened Step includes: the ratio and the outdoor environment temperature according to the booting capacity of the air-conditioning system with the total capacity of the outdoor unit Degree determines the quantity that the outdoor unit is opened and the quantity that the external heat exchanger is opened.
In some embodiments, according to the outdoor environment temperature, the indoor environment temperature and the air-conditioning system Booting capacity determine the quantity that the outdoor unit is opened and the quantity that the external heat exchanger is opened, and control the outdoor unit and The step of external heat exchanger is opened includes: the total capacity, described of booting capacity according to the air-conditioning system, the outdoor unit Outdoor environment temperature, the indoor environment temperature and indoor fiducial temperature determine the quantity that the outdoor unit is opened and described outer change The quantity that hot device is opened.
In some embodiments, when the quantity that the outdoor unit is opened is multiple, what each outdoor unit was opened The quantity of the external heat exchanger is identical.
In some embodiments, the default pressure at expulsion includes the first preset pressure, obtains the air-conditioning system Pressure at expulsion controls quantity that the outdoor unit is opened and described outer according to the relationship of the pressure at expulsion and default pressure at expulsion The step of quantity that heat exchanger is opened includes: to be less than or equal to first preset pressure in the pressure at expulsion and continue first When duration, the quantity that the outdoor unit is opened and/or the quantity that the external heat exchanger is opened are reduced.
In some embodiments, the default pressure at expulsion includes the second preset pressure, obtains the air-conditioning system Pressure at expulsion controls quantity that the outdoor unit is opened and described outer according to the relationship of the pressure at expulsion and default pressure at expulsion The step of quantity that heat exchanger is opened includes: to be greater than or equal to second preset pressure in the pressure at expulsion and continue second When duration, increase the quantity that the outdoor unit is opened and/or the quantity that the external heat exchanger is opened.
In some embodiments, the pressure at expulsion for obtaining the air-conditioning system, according to the pressure at expulsion and in advance If the relationship of pressure at expulsion control the step of quantity that the outdoor unit is opened and quantity that the external heat exchanger is opened include: After the air-conditioning system runs preset duration with the refrigeration mode, according to the pressure at expulsion and the default pressure at expulsion The quantity that relationship controls the quantity that the outdoor unit is opened and the external heat exchanger is opened.
The air-conditioning system of embodiment of the present invention includes multiple outdoor units and control device, and each outdoor unit includes extremely A few external heat exchanger, the control device are used for when the air-conditioning system is run in a chiller mode, obtain outdoor environment temperature The booting capacity of degree and the air-conditioning system, or obtain the outdoor environment temperature, indoor environment temperature and the air-conditioning system Booting capacity, and for the booting capacity according to the outdoor environment temperature and the air-conditioning system, or according to the outdoor The booting capacity of environment temperature, the indoor environment temperature and the air-conditioning system determines the quantity and institute that the outdoor unit is opened The quantity of external heat exchanger unlatching is stated, and controls the outdoor unit and external heat exchanger unlatching, and for obtaining the air-conditioning The pressure at expulsion of system, according to the relationship of the pressure at expulsion and default pressure at expulsion control quantity that the outdoor unit is opened and The quantity that the external heat exchanger is opened.
In the air-conditioning system of above embodiment, when air-conditioning system is opened, according to outdoor environment temperature and air-conditioning system Booting capacity and/or indoor environment temperature determine the quantity that outdoor unit and external heat exchanger are opened, avoid air-conditioning system because of condensation The too low problem of high pressure caused by pressure and evaporating pressure mismatch, increases the reliability of air-conditioning system.It is run in air-conditioning system In the process, the quantity that outdoor unit and external heat exchanger are opened can be adjusted according to the pressure at expulsion of air-conditioning system, can reduce sky in this way The fluctuation of adjusting system state guarantees air-conditioning system reliability of operation and stability.
In some embodiments, the control device is used for booting capacity and the outdoor according to the air-conditioning system The ratio of the total capacity of machine and the outdoor environment temperature determine that the quantity that the outdoor unit is opened and the external heat exchanger are opened Quantity.
In some embodiments, the control device is for the booting capacity according to the air-conditioning system, the outdoor The total capacity of machine, the outdoor environment temperature, the indoor environment temperature and indoor fiducial temperature determine that the outdoor unit is opened Quantity and the external heat exchanger open quantity.
In some embodiments, when the quantity that the outdoor unit is opened is multiple, what each outdoor unit was opened The quantity of the external heat exchanger is identical.
In some embodiments, the default pressure at expulsion includes the first preset pressure, and the control device is used for When the pressure at expulsion is less than or equal to first preset pressure and continues the first duration, reduces the outdoor unit and open Quantity and/or the external heat exchanger open quantity.
In some embodiments, the default pressure at expulsion includes the second preset pressure, and the control device is used for When the pressure at expulsion is greater than or equal to second preset pressure and continues the second duration, increases the outdoor unit and open Quantity and/or the external heat exchanger open quantity.
In some embodiments, the control device is used for default with refrigeration mode operation in the air-conditioning system After duration, the quantity and the outer heat exchange that the outdoor unit is opened are adjusted according to the pressure at expulsion and the default pressure at expulsion The quantity that device is opened.
A kind of air-conditioning system of embodiment of the present invention includes multiple outdoor units, processor and memory, each room Outer machine includes at least one external heat exchanger, and the memory is stored with control program, and the control program is held by the processor Row is to realize control method described in any of the above-described embodiment.
In the air-conditioning system of above embodiment, when air-conditioning system is opened, processor can execute control program with root Determine what outdoor unit and external heat exchanger were opened according to the booting capacity and/or indoor environment temperature of outdoor environment temperature and air-conditioning system Quantity, the too low problem of high pressure caused by avoiding air-conditioning system from mismatching because of condensing pressure and evaporating pressure increase air-conditioning system Reliability.In air-conditioning system operational process, outdoor unit and external heat exchanger can be adjusted according to the pressure at expulsion of air-conditioning system The quantity of unlatching can reduce the fluctuation of air-conditioning system state in this way, guarantee air-conditioning system reliability of operation and stability.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention is from combining in description of the following accompanying drawings to embodiment by change It obtains obviously and is readily appreciated that, in which:
Fig. 1 is the module diagram of the air-conditioning system of embodiment of the present invention.
Fig. 2 is the flow diagram of the control method of embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the air-conditioning system of embodiment of the present invention.
Fig. 4 is the outdoor unit of embodiment of the present invention and the status diagram of external heat exchanger.
Fig. 5 is another flow diagram of the control method of embodiment of the present invention.
Fig. 6 is another module diagram of the air-conditioning system of embodiment of the present invention.
Main element symbol description:
Air-conditioning system 10, outdoor unit 11, external heat exchanger 112, compressor 114, control device 12, indoor unit 13, interior heat exchange Device 132, pressure sensor 14, low-pressure tank 15, oil return apparatus 16, processor 17, memory 18.
Specific embodiment
Embodiments of the present invention are described below in detail, the embodiment of the embodiment is shown in the accompanying drawings, wherein Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below It crosses the embodiment being described with reference to the drawings to be exemplary, for explaining only the invention, and should not be understood as to limit of the invention System.
In the description of the present invention, it is to be understood that, term " center ", "left", "right", "inner", "outside", etc. instructions Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched It states, rather than the device or element of indication or suggestion meaning must have a particular orientation, be constructed and operated in a specific orientation, Therefore it is not considered as limiting the invention.In addition, term " first ", " second " are used for description purposes only, and cannot understand For indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic.Define as a result, " first ", The feature of " second " can explicitly or implicitly include one or more feature.In the description of the present invention, " more It is a " it is meant that two or more, unless otherwise specifically defined.
In the description of embodiments of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one Connect to body;It can be mechanical connection, be also possible to be electrically connected or can mutually communicate;It can be directly connected, can also lead to It crosses intermediary to be indirectly connected, can be the connection inside two elements or the interaction relationship of two elements.For ability For the those of ordinary skill in domain, can understand as the case may be above-mentioned term in embodiments of the present invention specifically contain Justice.
Also referring to Fig. 1 to Fig. 4, the air-conditioning system 10 of embodiment of the present invention includes multiple outdoor units 11 and control dress Set 12, each outdoor unit 11 includes at least one external heat exchanger 112, air-conditioning system 10 can embodiment through the invention control The state of outdoor unit 11 and external heat exchanger 112 is adjusted in method processed, for example, the quantity and outer heat exchange opened to outdoor unit 11 The quantity that device 112 is opened is controlled.
Specifically, in some embodiments, control method includes:
Step S1 obtains opening for outdoor environment temperature and air-conditioning system 10 when air-conditioning system 10 is run in a chiller mode Machine capacity;
Step S2, according to the booting capacity of outdoor environment temperature and air-conditioning system 10 determine outdoor unit 11 open quantity and The quantity that external heat exchanger 112 is opened, and control outdoor unit 11 and the unlatching of external heat exchanger 112;With
Step S3 obtains the pressure at expulsion of air-conditioning system 10, is controlled according to the relationship of pressure at expulsion and default pressure at expulsion The quantity that the quantity and external heat exchanger 112 that outdoor unit 11 is opened are opened.
For air-conditioning system 10, step S1, step S2 and step S3 can be realized by control device 12, in other words, control Device 12 processed can be used for when air-conditioning system 10 is run in a chiller mode, obtain opening for outdoor environment temperature and air-conditioning system 10 Machine capacity, and for determining quantity that outdoor unit 11 is opened and outer according to the booting capacity of outdoor environment temperature and air-conditioning system 10 The quantity that heat exchanger 112 is opened, and outdoor unit 11 and the unlatching of external heat exchanger 112 are controlled, and for obtaining air-conditioning system 10 Pressure at expulsion controls the quantity and external heat exchanger 112 that outdoor unit 11 is opened according to the relationship of pressure at expulsion and default pressure at expulsion The quantity of unlatching.
In the control method and air-conditioning system 10 of embodiment of the present invention, when air-conditioning system 10 is run in a chiller mode, The quantity that outdoor unit 11 and external heat exchanger 112 are opened is determined according to the booting capacity of outdoor environment temperature and air-conditioning system 10, is kept away Exempt from the too low problem of high pressure caused by air-conditioning system 10 is mismatched because of condensing pressure and evaporating pressure, increase air-conditioning system 10 can By property.In 10 operational process of air-conditioning system, outdoor unit 11 and outer heat exchange can be controlled according to the pressure at expulsion of air-conditioning system 10 The quantity that device 112 is opened, can reduce the fluctuation of 10 state of air-conditioning system in this way, guarantee 10 reliability of operation of air-conditioning system and steady It is qualitative.
Wherein, external heat exchanger 112 open quantity include in multiple outdoor units 11 external heat exchanger 112 open total quantity and The quantity that external heat exchanger 112 is opened in the outdoor unit 11 of each unlatching.
In the illustrated embodiment, 1 outdoor unit 11 includes 2 external heat exchangers 112.
Air-conditioning system 10 is run in a chiller mode can be air-conditioning system 10 and is opened by closed state and run refrigeration mode, Or air-conditioning system 10 is switched to refrigeration mode or air-conditioning system 10 after oil return mode and is switched to after defrost pattern Refrigeration mode etc..
Specifically, air-conditioning system 10 includes indoor unit 13, and indoor unit 13 includes interior heat exchanger 132, and outdoor unit 11 includes pressure Contracting machine 114.When air-conditioning system 10 is run in a chiller mode, external heat exchanger 112 can be condenser, and interior heat exchanger 132 can be Evaporator, 114 compression refrigerant of compressor form high temperature and high pressure gas, and then refrigerant condenses through condenser heat rejection and through restricting element Low temperature and low pressure liquid is formed, low-temp low-pressure refrigerant absorbs heat to evaporate indoors through evaporator forms low temperature low pressure gas, so that indoor Temperature reduces, and reaches refrigeration effect.
Wherein, air-conditioning system 10 includes pressure sensor 14, and pressure sensor 14 is used to detect the exhaust of air-conditioning system 10 Pressure.The pressure at expulsion of air-conditioning system 10 is the pressure for the gaseous coolant that compressor 114 is discharged.
In some embodiments, air-conditioning system 10 can be multi-online air-conditioning system 10, as shown in Figure 1, indoor unit 13 Quantity can be 2 or 2 or more, multiple outdoor units 11 meet the refrigeration demand of multiple indoor units 13.It is appreciated that at it In his embodiment, the quantity of indoor unit 13 can be 1, and multiple outdoor units 11 meet the refrigeration demand of 1 indoor unit 13.
It should be noted that Fig. 3 show the structural schematic diagram that an outdoor unit 11 is connect with multiple indoor units 13, it is outdoor Machine 11 can be individually for multiple indoor units 13 and realize refrigeration.In the air-conditioning system of embodiment of the present invention, the number of outdoor unit 11 Amount be it is multiple, multiple outdoor units 11 can be connected in parallel, and outdoor unit 11 can be individually for multiple indoor units 13 and realize refrigeration, or more A outdoor unit 11 realizes refrigeration jointly for multiple indoor units 13.
Specifically, in the embodiment shown in fig. 1, each outdoor unit 11 all has corresponding compressor 114, multiple outdoors When the parallel running under the same conditions of machine 11, the pressure at expulsion of each outdoor unit 11 is essentially identical.Certainly, in other embodiments In, can be multiple outdoor units 11 and connect 1 compressor, 114,1 compressor 114 is that multiple outdoor units 11 provide refrigerant, herein It is not specifically limited.
In some embodiments, referring to Fig. 3, air-conditioning system 10 includes connection external heat exchanger 112, interior heat exchanger 122 With the low-pressure tank 15 of compressor 114 and the oil return apparatus 16 of connect compressor 114.
Wherein, low-pressure tank 15 advantageously ensure that air-conditioning system 10 back pressure stablize, and can storing liquid refrigerant, keep away Exempt from liquid refrigerants impact compress machine 114, increases the reliability of air-conditioning system 10.Oil return apparatus 16 is arranged for separating with cold media gas The lubricating oil of compressor 114 out, and isolated lubricating oil is supplied to compressor 114, avoid compressor 114 from damaging because of oil starvation It is bad.
Further, the booting capacity of air-conditioning system 10 can be the booting capacity of indoor unit 13, due to air-conditioning system 11 Capacity it is related to the rated cooling capacity of outdoor unit 11 and/or indoor unit 13, in other words, the booting capacity of air-conditioning system 10 can It is related with the quantity opened to indoor unit 13.
In this way, determining outdoor unit 11 according to the booting capacity of air-conditioning system 10 in step s 2 when air-conditioning system 10 is freezed The quantity that the quantity and external heat exchanger 112 of unlatching are opened, it is ensured that when indoor unit 13 is with rated power operation, outdoor unit 11 is just Often operation can satisfy the refrigeration demand of indoor unit 13.
In some embodiments, step S2 includes: total appearance according to the booting capacity and outdoor unit 11 of air-conditioning system 10 The ratio and outdoor environment temperature of amount determine the quantity that outdoor unit 11 is opened and the quantity that external heat exchanger 112 is opened.
For air-conditioning system 10, control device 12 can be used for the booting capacity and outdoor unit 11 according to air-conditioning system 10 The ratio and outdoor environment temperature of total capacity determine the quantity that outdoor unit 11 is opened and the quantity that external heat exchanger 112 is opened.
Specifically, control method controls the state of outdoor unit 11 and external heat exchanger 112, wherein 11 He of outdoor unit The quantity class that the state of external heat exchanger 112 does not correspond to the quantity of the unlatching of outdoor unit 11 simultaneously and external heat exchanger 112 is opened can not Together.Control device 12 can prestore booting capacity, outdoor environment temperature and the outdoor unit 11 and external heat exchanger of air-conditioning system 10 First corresponding relationship of 112 state.Control device 12 determines quantity that outdoor unit 11 is opened and outer according to the first corresponding relationship The quantity that heat exchanger 112 is opened.
First corresponding relationship such as table 1:
Table 1
Wherein, T11, T12, T13..., T1nThe boundary in section, and T1 are judged for outdoor environment temperature1> T12> T13> ... > T1n。γ1, γ2, γ3..., γmFor the ratio in judgement section of the total capacity of the booting capacity and outdoor unit 11 of air-conditioning system 10 Boundary, and 0 < γ1< γ2< γ3< ... < γm< 1.
It should be noted that in the first corresponding relationship, the booting capacity and different outdoor environment temperatures of different indoor units 13 The state of corresponding outdoor unit 11 and external heat exchanger 112 can be identical or not identical.
In one example, the state of outdoor unit 11 and external heat exchanger 112 is as shown in figure 4, air-conditioning system 10 includes 3 rooms Outer machine (11A, 11B, 11C), each outdoor unit 11 include 2 external heat exchangers 112, and the state of system includes what outdoor unit 11 was opened The quantity that quantity and indoor unit 13 are opened, for example, state 0 indicates that outdoor unit 11 and external heat exchanger 112 are not turned in figure;State 1 indicates that the quantity of the unlatching of outdoor unit 11 and external heat exchanger 112 is 1;State 2 indicates that the quantity that outdoor unit 11 is opened is 1 A, the quantity that external heat exchanger 112 is opened is 2, and 1 outdoor unit 11 opens 2 external heat exchangers 112;State 3 indicates outdoor unit 11 The quantity opened with external heat exchanger 112 is 3, and each outdoor unit 11 opens 1 external heat exchanger 112 etc..State 4 indicates outdoor The quantity that machine 11 is opened is 2, and each outdoor unit 11 opens 2 external heat exchangers 112;State 5 indicates the number that outdoor unit 11 is opened Amount is 3, and each outdoor unit 11 opens 2 external heat exchangers 112.
In other examples, the quantity of outdoor unit 11, the quantity of external heat exchanger 112 can be not limited in each outdoor unit 11 Embodiment discussed above, and can be converted according to actual needs, it is not specifically limited herein.
Correspondingly, the first corresponding relationship is specifically such as table 2:
Table 2
In other words, outdoor environment temperature judges that the boundary in section can be T11=17 DEG C, T12=5 DEG C, T13=-5 DEG C, T14=-15 DEG C;The boundary in the ratio in judgement section of the total capacity of the booting capacity and outdoor unit 11 of air-conditioning system 10 can be γ1 =15%, γ2=40%, γ3=60%, γ4=80%.
Certainly, in other examples, T11, T12, T13..., T1nCan flexible configuration according to the actual situation, γ1, γ2, γ3..., γmCan flexible configuration according to the actual situation, be not specifically limited herein.
In some embodiments, when air-conditioning system 10 opens refrigeration mode operation, in the certain feelings of outdoor environment temperature Under condition, the booting capacity of air-conditioning system 10 is bigger, and the quantity that the quantity and/or external heat exchanger 112 that outdoor unit 11 is opened are opened is got over It is more;In the case that the booting capacity of air-conditioning system 10 is certain, outdoor environment temperature is lower, outdoor unit 11 open quantity and/or The quantity that external heat exchanger 112 is opened is fewer.In this way, when air-conditioning system 10 is opened, quantity and external heat exchanger that outdoor unit 11 is opened 112 quantity opened can make the condensing capacity of external heat exchanger 112 and the evaporability of interior heat exchanger 132 match, thus empty Adjusting system 10 can increase the reliability of air-conditioning system 10 with stable operation refrigeration mode.
Referring to Fig. 5, in some embodiments, control method includes:
Step S1 ', when air-conditioning system 10 is run in a chiller mode, obtain outdoor environment temperature, indoor environment temperature and The booting capacity of air-conditioning system 10;
Step S2 ' determines outdoor unit according to the booting capacity of outdoor environment temperature, indoor environment temperature and air-conditioning system 10 The quantity that 11 quantity opened and external heat exchanger 112 are opened, and control outdoor unit 11 and the unlatching of external heat exchanger 112;With
Step S3 obtains the pressure at expulsion of air-conditioning system 10, is controlled according to the relationship of pressure at expulsion and default pressure at expulsion The quantity that the quantity and external heat exchanger 112 that outdoor unit 11 is opened are opened.
For air-conditioning system, step S1 ', step S2 ' and step S3 can be realized by control device 12, in other words, control Device 12 processed can be used for when air-conditioning system 10 is run in a chiller mode, obtain outdoor environment temperature, indoor environment temperature and The booting capacity of air-conditioning system 10, and for being held according to the booting of outdoor environment temperature, indoor environment temperature and air-conditioning system 10 It measures and determines the quantity that outdoor unit 11 is opened and the quantity that external heat exchanger 112 is opened, and control outdoor unit 11 and external heat exchanger 112 is opened It opens, and the pressure at expulsion for obtaining air-conditioning system 10, according to outside the relationship control room of pressure at expulsion and default pressure at expulsion The quantity that the quantity and external heat exchanger 112 that machine 11 is opened are opened.
Correspondingly, control method can be when air-conditioning system 10 be run in a chiller mode, according to outdoor environment temperature, interior Environment temperature and booting capacity determine the quantity that outdoor unit 11 and external heat exchanger 112 are opened, and air-conditioning system 10 is avoided to press because of condensation The too low problem of high pressure caused by power and evaporating pressure mismatch, increases the reliability of air-conditioning system 10.It is transported in air-conditioning system 10 During row, the number that outdoor unit 11 and external heat exchanger 112 are opened can be controlled according to the relationship of the pressure at expulsion of air-conditioning system 10 Amount can reduce the fluctuation of 10 state of air-conditioning system in this way, guarantee 10 reliability of operation of air-conditioning system and stability.
In some embodiments, step S2 ' includes: total appearance according to be switched on capacity, the outdoor unit 11 of air-conditioning system 10 Amount, outdoor environment temperature, indoor environment temperature and indoor fiducial temperature determine the quantity and external heat exchanger 112 that outdoor unit 11 is opened The quantity of unlatching.
For air-conditioning system 10, control device 12 can be used for booting capacity, the outdoor unit 11 according to air-conditioning system 10 Total capacity, outdoor environment temperature, indoor environment temperature and indoor fiducial temperature determine quantity and outer heat exchange that outdoor unit 11 is opened The quantity that device 112 is opened.
Specifically, control device 12 can be according to the booting capacity of air-conditioning system 10, the total capacity of outdoor unit 11, indoor ring Border temperature and indoor fiducial temperature calculate to obtain a reference value θ, control device 12 prestore reference value, outdoor environment temperature and Second corresponding relationship of the state of outdoor unit 11 and external heat exchanger 112.Wherein reference value is calculated according to following condition formulae:
Reference value θ=indoor unit booting capacity/outdoor unit total capacity × (T2-T0)/T0 × 100
Wherein, T2 is indoor environment temperature, and T0 is indoor fiducial temperature, when calculating reference value, indoor environment temperature and room The unit of interior fiducial temperature is K.
Second corresponding relationship such as table 3:
Table 3
Wherein, θ1, θ2, θ3..., θmThe boundary in section, and 0 < θ are judged for reference value1< θ2< θ3< ... < θm
It should be noted that in the second corresponding relationship, different chamber's reference value and the corresponding outdoor of different outdoor environment temperatures The state of machine 11 and external heat exchanger 112 can be identical or not identical.
In one example, the second corresponding relationship is specifically such as table 4:
Table 4
In other words, reference value judges that the boundary in section can be θ1=0.2, θ2=0.6, θ3=1.0, θ4=1.6.Its In, indoor fiducial temperature can be 273K, i.e. T0=273K.
Certainly, in other examples, θ1, θ2, θ3..., θmIt can flexible configuration, T0 can be according to realities according to actual needs Border needs flexible configuration, is not specifically limited herein.
In other examples, indoor fiducial temperature can be determined according to target temperature set by user.For example, user sets Target temperature can be T3, T0=T3 or T0=T3-a, a is definite value and for positive number.In this way, air-conditioning system 10 is in a chiller mode Operation, and room temperature reaches target temperature or when lower than target temperature certain value, air-conditioning system 10 may be at standby mode, It controls outdoor unit 11 and external heat exchanger 112 is all closed, temporarily cease refrigeration.
In some embodiments, when air-conditioning system 10 opens refrigeration mode operation, in the certain feelings of outdoor environment temperature Under condition, reference value is bigger, and the quantity that the quantity and/or external heat exchanger 112 that outdoor unit 11 is opened are opened is more;It is certain in reference value In the case where, outdoor environment temperature is lower, and the quantity that the quantity and/or external heat exchanger 112 that outdoor unit 11 is opened are opened is fewer.Together Sample, when air-conditioning system 10 is opened, the quantity that the quantity and external heat exchanger 112 that outdoor unit 11 is opened are opened can make outer heat exchange The condensing capacity of device 112 is matched with the evaporability of interior heat exchanger 132, the mould so that air-conditioning system 10 can be freezed with stable operation Formula increases the reliability of air-conditioning system 10.
In some embodiments, when the quantity that outdoor unit 11 is opened is multiple, outer the changing of each unlatching of outdoor unit 11 The quantity of hot device 112 is identical.
In this way, the quantity for the external heat exchanger 112 that each outdoor unit 11 is opened is identical, each when air-conditioning system 10 is run In the identical situation of 112 heat exchange amount of external heat exchanger, the refrigerant pressure that multiple outdoor units 11 in parallel export is essentially identical, can keep away Exempting from the output of outdoor unit 11 refrigerant pressure difference leads to refrigerant bias current, returns liquid.
In some embodiments, presetting pressure at expulsion includes the first preset pressure, and step S3 includes: small in pressure at expulsion In or equal to the first preset pressure and when continuing the first duration, the quantity and/or external heat exchanger that outdoor unit 11 is opened are reduced 112 quantity opened.
For air-conditioning system 10, control device 12 can be used for being less than or equal to the first preset pressure in pressure at expulsion and hold When continuous first duration, the quantity that outdoor unit 11 is opened and/or the quantity that external heat exchanger 112 is opened are reduced.
It is appreciated that in cooling mode, when pressure at expulsion is less than or equal to the first preset pressure, the row of air-conditioning system 10 Atmospheric pressure is smaller, i.e. the evaporation of the heat dissipation capacity of the outdoor unit 11 larger condensing capacity for making external heat exchanger 112 and interior heat exchanger 132 Ability mismatches, at this point it is possible to the quantity that the quantity and/or reduction external heat exchanger 112 opened by construction outdoor unit 11 are opened, To reduce the heat exchange amount of external heat exchanger 112, so that the evaporability of the condensing capacity of external heat exchanger 112 and interior heat exchanger 132 Matching, air-conditioning system 10 can increase the reliability of air-conditioning system 10 with stable operation refrigeration mode.
Wherein, the first duration can be to avoid the dynamic state for causing outdoor unit 11 and external heat exchanger 112 of exhaust pressure wave Frequent progress controls to adjust.Further, air-conditioning system 10 can have enough time so as to obtain exhaust pressure after controlling to adjust every time Power is stablized, and carries out state control again after pressure at expulsion is stablized.
In one example, the state grade of outdoor unit 11 and external heat exchanger 112 are as follows: 5 > state of state, 4 > state, 3 > 2 > state of state, 1 > state 0.The quantity that the quantity and/or external heat exchanger 112 that outdoor unit 11 is opened are opened is with 11 He of outdoor unit The state grade of external heat exchanger 112 reduces and reduces, and the first preset pressure can be 1.5MPa, and the first duration can be 10 Minute.In this way, in pressure at expulsion Pc≤1.5MPa and when continuing 10 minutes, if the state grade of outdoor unit 11 be not it is minimum, The state grade of outdoor unit 11 and external heat exchanger 112 reduces level-one, for example, outdoor unit 11 and external heat exchanger 112 are controlled by state 5 Adjust state 4.If the state grade of outdoor unit 11 reaches minimum, air-conditioning system 10 can pass through rotation speed of fan, compressor 114 frequency etc. controls to adjust pressure at expulsion.When the state grade of outdoor unit 11 reaches minimum, external heat exchanger 112 is all closed.
Certainly, the first preset pressure and the first duration can be not limited to embodiment discussed above, and can root According to actual needs flexible configuration, it is not specifically limited herein.
In some embodiments, presetting pressure at expulsion includes the second preset pressure, and step S3 includes: big in pressure at expulsion In or equal to the second preset pressure and when continuing the second duration, increases quantity that outdoor unit 11 is opened and/or heat exchanger is opened The quantity opened.
For air-conditioning system 10, control device 12 can be used for being greater than or equal to the second preset pressure in pressure at expulsion and hold When continuous second duration, increase the quantity that outdoor unit 11 is opened and/or the quantity that external heat exchanger 112 is opened.
It is appreciated that in cooling mode, when pressure at expulsion is greater than or equal to the second preset pressure, the row of air-conditioning system 10 Atmospheric pressure is larger, i.e. the evaporation of the heat dissipation capacity of the outdoor unit 11 smaller condensing capacity for making external heat exchanger 112 and interior heat exchanger 132 Ability mismatches, at this point it is possible to by increasing the quantity that outdoor unit 11 is opened and/or the quantity that increase external heat exchanger 112 is opened, To increase the heat exchange amount of external heat exchanger 112, so that the evaporability of the condensing capacity of external heat exchanger 112 and interior heat exchanger 132 Matching, air-conditioning system 10 can increase the reliability of air-conditioning system 10 with stable operation refrigeration mode.
Wherein, the second preset pressure is greater than the first preset pressure, and the second duration can be made to avoid exhaust pressure wave is dynamic It is controlled to adjust at the state frequent progress of outdoor unit 11 and external heat exchanger 112.Further, air-conditioning system 10 controls to adjust every time After can have enough time so as to obtain pressure at expulsion stablize, pressure at expulsion stablize after controlled to adjust again.Second continues Duration can be identical with the first duration or not identical.
In one example, the second preset pressure can be 2.9MPa, and the second duration can be 10 minutes.In this way, In pressure at expulsion Pc≤2.9MPa and when continuing 10 minutes, if the state grade of outdoor unit 11 is not maximum, 11 He of outdoor unit The state grade of external heat exchanger 112 increases level-one, for example, outdoor unit 11 and external heat exchanger 112 are controlled to adjust by state 4 to state 5.If the state grade of outdoor unit 11 reaches maximum, air-conditioning system 10 can pass through rotation speed of fan, frequency of compressor 114 etc. Control to adjust pressure at expulsion.
In some embodiments, control method includes: greater than the first preset pressure and pre- less than second in pressure at expulsion If when pressure, controlling outdoor unit 11 and external heat exchanger 112 keeping current state.
For air-conditioning system 10, control device 12 can be used for being greater than the first preset pressure in pressure at expulsion and less than second When preset pressure, controls outdoor unit 11 and external heat exchanger 112 keeps current state.
In this way, pressure at expulsion is greater than the first preset pressure and less than the second preset pressure, it is believed that external heat exchanger 112 The condensing capacity of condensing capacity and interior heat exchanger 132 difference is smaller, the normal work of air-conditioning system 10 is not influenced, at this point, air-conditioning System 10 can not have to the state for adjusting outdoor unit 11 and external heat exchanger 112.
In some embodiments, step S3 include: after air-conditioning system 10 runs preset duration in a chiller mode, according to The quantity that the relationship of pressure at expulsion and default pressure at expulsion controls the quantity that outdoor unit 11 is opened and external heat exchanger 112 is opened.
For air-conditioning system 10, control device 12 can be used for running preset duration in a chiller mode in air-conditioning system 10 Afterwards, the quantity of the unlatching of outdoor unit 11 is controlled to adjust according to the relationship of pressure at expulsion and default pressure at expulsion and external heat exchanger 112 is opened The quantity opened.
In this way, can open refrigeration mode after the booting of air-conditioning system 10 or defrost, oil return, preset duration can be in sky Adjusting system 10 has enough time so as to obtain pressure at expulsion stabilization after opening refrigeration mode, guarantees outdoor unit 11 and external heat exchanger 112 State can accurately be controlled to adjust according to pressure at expulsion.
Referring to Fig. 6, the air-conditioning system 10 of embodiment of the present invention includes multiple outdoor units 11, processor 17 and memory 18, each outdoor unit 11 includes at least one external heat exchanger 112, and memory 18 is stored with control program, control program other places reason Device 17 executes the control method to realize any of the above-described embodiment.
In one example, control program is executed by processor 17 to perform the steps of
Step S1 obtains opening for outdoor environment temperature and air-conditioning system 10 when air-conditioning system 10 is run in a chiller mode Machine capacity;
Step S2, according to the booting capacity of outdoor environment temperature and air-conditioning system 10 determine outdoor unit 11 open quantity and The quantity that external heat exchanger 112 is opened, and control outdoor unit 11 and the unlatching of external heat exchanger 112;With
Step S3 obtains the pressure at expulsion of air-conditioning system 10, is controlled according to the relationship of pressure at expulsion and default pressure at expulsion The quantity that the quantity and external heat exchanger 112 that outdoor unit 11 is opened are opened.
In another example, control program is executed by processor 17 to perform the steps of
Step S1 ', when air-conditioning system 10 is run in a chiller mode, obtain outdoor environment temperature, indoor environment temperature and The booting capacity of air-conditioning system 10;
Step S2 ' determines outdoor unit according to the booting capacity of outdoor environment temperature, indoor environment temperature and air-conditioning system 10 The quantity that 11 quantity opened and external heat exchanger 112 are opened, and control outdoor unit 11 and the unlatching of external heat exchanger 112;With
Step S3 obtains the pressure at expulsion of air-conditioning system 10, is controlled according to the relationship of pressure at expulsion and default pressure at expulsion The quantity that the quantity and external heat exchanger 112 that outdoor unit 11 is opened are opened.
In the air-conditioning system 10 of above embodiment, when air-conditioning system 10 is opened, processor 17 can execute control journey Sequence is to determine outdoor unit 11 according to the booting capacity and/or indoor environment temperature of outdoor environment temperature and air-conditioning system 10 and change outside The quantity that hot device 112 is opened, high pressure is too low caused by avoiding air-conditioning system 10 from mismatching because of condensing pressure and evaporating pressure asks Topic increases the reliability of air-conditioning system 10.It, can be according to the pressure at expulsion of air-conditioning system 10 in 10 operational process of air-conditioning system The quantity that outdoor unit 11 and external heat exchanger 112 are opened is controlled, the fluctuation of 10 state of air-conditioning system can be reduced in this way, guarantees air-conditioning system It unites 10 reliabilities of operation and stability.
In the description of this specification, reference term " embodiment ", " some embodiments ", " schematically implementation The description of mode ", " example ", specific examples or " some examples " etc. means the tool described in conjunction with the embodiment or example Body characteristics, structure, material or feature are contained at least one embodiment or example of the invention.In the present specification, Schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific features of description, knot Structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
Any process described otherwise above or method description are construed as in flow chart or herein, and expression includes It is one or more for realizing specific logical function or process the step of executable instruction code module, segment or portion Point, and the range of the preferred embodiment of the present invention includes other realization, wherein can not press shown or discussed suitable Sequence, including according to related function by it is basic simultaneously in the way of or in the opposite order, Lai Zhihang function, this should be of the invention Embodiment person of ordinary skill in the field understood.
Expression or logic and/or step described otherwise above herein in flow charts, for example, being considered use In the order list for the executable instruction for realizing logic function, may be embodied in any computer-readable medium, for Instruction execution system, device or equipment (such as computer based system, including the system of processing module or other can be from instruction Execute system, device or equipment instruction fetch and the system that executes instruction) use, or combine these instruction execution systems, device or Equipment and use.For the purpose of this specification, " computer-readable medium " can be it is any may include, store, communicating, propagating or Transfer program uses for instruction execution system, device or equipment or in conjunction with these instruction execution systems, device or equipment Device.The more specific example (non-exhaustive list) of computer-readable medium include the following: there are one or more wirings Electrical connection section (electronic device), portable computer diskette box (magnetic device), random access memory (RAM), read-only memory (ROM), erasable edit read-only storage (EPROM or flash memory), fiber device and portable optic disk is read-only deposits Reservoir (CDROM).In addition, computer-readable medium can even is that the paper that can print described program on it or other are suitable Medium, because can then be edited, be interpreted or when necessary with it for example by carrying out optical scanner to paper or other media His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each section of embodiments of the present invention can be with hardware, software, firmware or their combination come real It is existing.In the above-described embodiment, multiple steps or method can be with storages in memory and by suitable instruction execution system The software or firmware of execution is realized.For example, if realized with hardware, in another embodiment, ability can be used Any one of following technology or their combination well known to domain is realized: being had for realizing logic function to data-signal The discrete logic of logic gates, the specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc..
Those skilled in the art are understood that realize all or part of step that above-described embodiment method carries It suddenly is that relevant hardware can be instructed to complete by program, the program can store in a kind of computer-readable storage medium In matter, which when being executed, includes the steps that one or a combination set of embodiment of the method.
In addition, each functional unit in various embodiments of the present invention can integrate in a processing module, it can also To be that each unit physically exists alone, can also be integrated in two or more units in a module.It is above-mentioned integrated Module both can take the form of hardware realization, can also be realized in the form of software function module.The integrated module If in the form of software function module realize and when sold or used as an independent product, also can store one calculating In machine read/write memory medium.
Storage medium mentioned above can be read-only memory, disk or CD etc..
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (15)

1. a kind of control method is used for air-conditioning system, which is characterized in that the air-conditioning system includes multiple outdoor units, Mei Gesuo Stating outdoor unit includes at least one external heat exchanger, and the control method includes:
When the air-conditioning system is run in a chiller mode, the booting capacity of outdoor environment temperature and the air-conditioning system is obtained, Or obtain the booting capacity of the outdoor environment temperature, indoor environment temperature and the air-conditioning system;
According to the booting capacity of the outdoor environment temperature and the air-conditioning system, or according to the outdoor environment temperature, described Indoor environment temperature and the booting capacity of the air-conditioning system determine that the quantity that the outdoor unit is opened and the external heat exchanger are opened The quantity opened, and control the outdoor unit and external heat exchanger unlatching;With
The pressure at expulsion for obtaining the air-conditioning system controls the room according to the relationship of the pressure at expulsion and default pressure at expulsion The quantity that the quantity and the external heat exchanger that outer machine is opened are opened.
2. control method as described in claim 1, which is characterized in that according to the outdoor environment temperature and the air-conditioning system Booting capacity determine the quantity that the outdoor unit is opened and the quantity that the external heat exchanger is opened, and control the outdoor unit and The external heat exchanger open the step of include:
It is true according to the booting capacity and the ratio of the total capacity of the outdoor unit and the outdoor environment temperature of the air-conditioning system The quantity that the quantity and the external heat exchanger that the fixed outdoor unit is opened are opened.
3. control method as described in claim 1, which is characterized in that according to the outdoor environment temperature, the indoor environment The booting capacity of temperature and the air-conditioning system determines the quantity that the outdoor unit is opened and the quantity that the external heat exchanger is opened, And the step of controlling the outdoor unit and external heat exchanger unlatching, includes:
According to the booting capacity of the air-conditioning system, the total capacity of the outdoor unit, the outdoor environment temperature, the indoor ring Border temperature and indoor fiducial temperature determine the quantity that the outdoor unit is opened and the quantity that the external heat exchanger is opened.
4. control method as described in claim 1, which is characterized in that when the quantity that the outdoor unit is opened is multiple, often The quantity for the external heat exchanger that a outdoor unit is opened is identical.
5. control method as described in claim 1, which is characterized in that the default pressure at expulsion includes the first preset pressure, The pressure at expulsion for obtaining the air-conditioning system controls the outdoor unit according to the relationship of the pressure at expulsion and default pressure at expulsion The step of quantity that the quantity of unlatching and the external heat exchanger are opened includes:
When the pressure at expulsion is less than or equal to first preset pressure and continues the first duration, the outdoor is reduced The quantity that the quantity and/or the external heat exchanger that machine is opened are opened.
6. control method as described in claim 1, which is characterized in that the default pressure at expulsion includes the second preset pressure, The pressure at expulsion for obtaining the air-conditioning system controls the outdoor unit according to the relationship of the pressure at expulsion and default pressure at expulsion The step of quantity that the quantity of unlatching and the external heat exchanger are opened includes:
When the pressure at expulsion is greater than or equal to second preset pressure and continues the second duration, increase the outdoor The quantity that the quantity and/or the external heat exchanger that machine is opened are opened.
7. control method as described in claim 1, which is characterized in that the pressure at expulsion for obtaining the air-conditioning system, root The quantity and external heat exchanger unlatching that the outdoor unit is opened are controlled according to the relationship of the pressure at expulsion and default pressure at expulsion Quantity the step of include:
After the air-conditioning system runs preset duration with the refrigeration mode, according to the pressure at expulsion and the default exhaust The quantity that the relationship of pressure controls the quantity that the outdoor unit is opened and the external heat exchanger is opened.
8. a kind of air-conditioning system, which is characterized in that including multiple outdoor units and control device, each outdoor unit includes at least One external heat exchanger, the control device are used for when the air-conditioning system is run in a chiller mode, obtain outdoor environment temperature With the booting capacity of the air-conditioning system, or the outdoor environment temperature, indoor environment temperature and the air-conditioning system are obtained Be switched on capacity, and for the booting capacity according to the outdoor environment temperature and the air-conditioning system, or according to the outdoor ring The booting capacity of border temperature, the indoor environment temperature and the air-conditioning system determines the quantity that the outdoor unit is opened and described The quantity that external heat exchanger is opened, and the outdoor unit and external heat exchanger unlatching are controlled, and for obtaining the air-conditioning system The pressure at expulsion of system controls the quantity and institute that the outdoor unit is opened according to the relationship of the pressure at expulsion and default pressure at expulsion State the quantity of external heat exchanger unlatching.
9. air-conditioning system as claimed in claim 8, which is characterized in that the control device is used for according to the air-conditioning system The ratio and the outdoor environment temperature of the total capacity of booting capacity and the outdoor unit determine the quantity that the outdoor unit is opened The quantity opened with the external heat exchanger.
10. air-conditioning system as claimed in claim 8, which is characterized in that the control device is used for according to the air-conditioning system Booting capacity, the total capacity of the outdoor unit, the outdoor environment temperature, the indoor environment temperature and indoor fiducial temperature Determine the quantity that the outdoor unit is opened and the quantity that the external heat exchanger is opened.
11. air-conditioning system as claimed in claim 8, which is characterized in that when the quantity that the outdoor unit is opened is multiple, often The quantity for the external heat exchanger that a outdoor unit is opened is identical.
12. air-conditioning system as claimed in claim 8, which is characterized in that the default pressure at expulsion includes the first preset pressure, The control device is used for when the pressure at expulsion is less than or equal to first preset pressure and continues the first duration, Reduce the quantity that the outdoor unit is opened and/or the quantity that the external heat exchanger is opened.
13. air-conditioning system as claimed in claim 8, which is characterized in that the default pressure at expulsion includes the second preset pressure, The control device is used for when the pressure at expulsion is greater than or equal to second preset pressure and continues the second duration, Increase the quantity that the outdoor unit is opened and/or the quantity that the external heat exchanger is opened.
14. air-conditioning system as claimed in claim 8, which is characterized in that the control device be used for the air-conditioning system with After the refrigeration mode operation preset duration, the room is controlled according to the relationship of the pressure at expulsion and the default pressure at expulsion The quantity that the quantity and the external heat exchanger that outer machine is opened are opened.
15. a kind of air-conditioning system, which is characterized in that including multiple outdoor units, processor and memory, each outdoor unit packet At least one external heat exchanger is included, the memory is stored with control program, and the control program is executed by the processor with reality The existing described in any item control methods of claim 1-7.
CN201910016336.XA 2019-01-08 2019-01-08 Control method and air-conditioning system Pending CN109595850A (en)

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