CN107477934A - Control method, system and the computer-readable recording medium of multi-connected air conditioner - Google Patents
Control method, system and the computer-readable recording medium of multi-connected air conditioner Download PDFInfo
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- CN107477934A CN107477934A CN201710848951.8A CN201710848951A CN107477934A CN 107477934 A CN107477934 A CN 107477934A CN 201710848951 A CN201710848951 A CN 201710848951A CN 107477934 A CN107477934 A CN 107477934A
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- outdoor unit
- expansion valve
- electric expansion
- outdoor
- average exhaust
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of control method of multi-connected air conditioner, multi-connected air conditioning system and computer-readable recording medium, this method includes：Whether the degree of superheat for detecting each outdoor unit reaches target call；If so, the first the judgement whether average exhaust for carrying out each outdoor unit is equal with the average exhaust of outdoor machine system；Judge if it is not, whether the degree of superheat of path where carrying out the electric expansion valve of each outdoor unit is more than the second of the first preset value；If so, whether the average exhaust for carrying out each outdoor unit is more than the 3rd judgement of the average exhaust of outdoor machine system；When the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；When the 3rd judged result is "No", then the aperture of the electric expansion valve is reduced.The present invention sprays the aperture of electric expansion valve by controlling, and solves the problems, such as that refrigerant distribution is uneven, effectively controls the delivery temperature of system.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of control method of multi-connected air conditioner, multi-connected air conditioner system
System and computer-readable recording medium.
Background technology
VRF Air Conditioning System, especially multi-joint unit in parallel, in actual use, by installation site, peace
Tubulature road, outer machine spacing and drop etc. influence, and refrigerant easily occur and are distributed between outdoor unit uneven, cause outdoor unit to run
It is abnormal, the outdoor unit more than refrigerant be likely to occur back the few outdoor unit discharge temperature drift of liquid, refrigerant, may oil starvation grind
Damage, causes outdoor unit to damage when serious, compressor damage etc..
The outdoor unit of different capabilities can be entered by installation pipe arrangement caliber during parallel connection and corresponding valve body control method
The distribution of row refrigerant, balance is realized as far as possible；But when carrying out in parallel for more outdoor units of identical capacity, due to its pipe arrangement pipe
Footpath and valve body control are identical, when outdoor unit because the influences such as installation site, outer machine spacing and drop cause refrigerant in outdoor
Distributed between machine it is uneven, it is possible that above-mentioned consequence, refrigeration system reliability are low.
The content of the invention
It is a primary object of the present invention to provide a kind of control method of multi-connected air conditioner, multi-connected air conditioning system and calculating
Machine readable storage medium storing program for executing, it is intended to solve the problems, such as that the refrigerant distribution between the outdoor unit in multi-connected air conditioning system is uneven.
To achieve the above object, a kind of control method of multi-connected air conditioner provided by the invention, the multiple air conditioner are stealthily substituted
Include at least two outdoor units, every outdoor unit includes at least one compressor, and at least two outdoor units are into outdoor
Machine system；The control method of the multi-connected air conditioner comprises the following steps：
Whether the degree of superheat of each outdoor unit of detection reaches target call；
When the degree of superheat of each outdoor unit reaches target call, the average exhaust temperature of each outdoor unit is carried out
Degree and the average exhaust of the outdoor machine system whether equal first judgement；
In the average exhaust of each outdoor unit and the unequal average exhaust of the outdoor machine system,
Whether the degree of superheat of path where carrying out the electric expansion valve of each outdoor unit, which is more than the second of the first preset value, judges；
The degree of superheat of path is more than the first preset value where each electric expansion valve for carrying out the outdoor unit, carries out every
Whether the average exhaust of the individual outdoor unit is more than the 3rd judgement of the average exhaust of outdoor machine system；
When the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；It is in the 3rd judged result
During "No", then the aperture of the electric expansion valve is reduced.
Preferably, the step of whether degree of superheat of each outdoor unit of the detection reaches target call includes：
Obtain the delivery temperature of each outdoor unit；
Minimum delivery temperature in all outdoor units is relatively obtained according to the delivery temperature obtained；
Whether the degree of superheat for detecting outdoor unit corresponding to the minimum delivery temperature reaches target call.
Preferably, the average exhaust and the average exhaust of the outdoor machine system for carrying out each outdoor unit
Temperature includes the step of whether equal first judges：
Obtain each average exhaust of the outdoor unit and the average exhaust of the outdoor machine system；
To the acquired average exhaust of each outdoor unit and the average exhaust temperature of the outdoor machine system
Degree makes the difference；
According to the average exhaust of each outdoor unit and the difference of the average exhaust of the outdoor machine system
Value judges whether each average exhaust of the outdoor unit and the average exhaust of the outdoor machine system are zero；
Each outdoor unit average exhaust and the outdoor machine system average exhaust difference not
When being zero, then the average exhaust of each outdoor unit and the average exhaust of the outdoor machine system are unequal.
Preferably, whether the degree of superheat of path is more than first where the electric expansion valve for judging each outdoor unit
Also include after the step of preset value：
When the degree of superheat of path where the electric expansion valve of each outdoor unit is less than or equal to the first preset value, sentence
Whether the degree of superheat of path is less than the second preset value where the disconnected electric expansion valve；
When the degree of superheat of path where the electric expansion valve is less than second preset value, then electric expansion valve is kept
Current aperture is constant.
Preferably, it is described when the 3rd judged result is "Yes", then wrap the step of the aperture for increasing the electric expansion valve
Include：
It is described when the 3rd judged result is "Yes", judge whether the open degree of the electric expansion valve of the outdoor unit is less than
Maximum opening；
When the aperture of the electric expansion valve of the outdoor unit is less than maximum opening, the electric expansion valve is controlled current
Increase aperture on the basis of aperture.
Preferably, it is described when the 3rd judged result is "No", then wrap the step of the aperture for reducing the electric expansion valve
Include：
It is described when the 3rd judged result is "No", judge whether the open degree of the electric expansion valve of the outdoor unit is less than
Minimum aperture；
When the aperture of the electric expansion valve of the outdoor unit is more than minimum aperture, then the electric expansion valve is controlled to work as
Reduce aperture on the basis of preceding aperture.
Preferably, methods described also includes：
Obtain the delivery temperature of the compressor of each outdoor unit；
Whether within a preset range to judge the delivery temperature of the compressor of each outdoor unit；
When the delivery temperature of the compressor of the outdoor unit exceedes preset range, then fault-signal is sent.
Preferably, whether the degree of superheat of path is more than first where the electric expansion valve for carrying out each outdoor unit
First preset value during the second of preset value judges changes with the change of environment temperature.
In addition, to achieve the above object, the present invention also provides a kind of multi-connected air conditioning system, the multi-connected air conditioning system
Including at least two outdoor units, every outdoor unit includes at least one compressor, and at least two outdoor units are into room
Outer machine system；The outdoor unit also includes reversal valve, outdoor heat exchanger, gas-liquid separator, the electricity connected on outdoor unit pipeline
Sub- expansion valve, high-pressure stop valve and low-pressure shutoff valve；The multi-connected air conditioning system also includes：Memory, processor and deposit
The control program for the multi-connected air conditioner that can be run on the memory and on the processor is stored up, the multi-connected air conditioner
The step of method as described above being realized when control program is by the computing device.
In addition, to achieve the above object, the present invention also provides a kind of computer-readable recording medium, described computer-readable
The control program of multi-connected air conditioner is stored with storage medium, it is real when the control program of the multi-connected air conditioner is executed by processor
Now the step of control method of multi-connected air conditioner as described above.
The control method of multi-connected air conditioner of the present invention is by detecting whether the degree of superheat of each outdoor unit reaches target
It is required that；When the degree of superheat of each outdoor unit reaches target call, the average exhaust of each outdoor unit is carried out
With whether equal first judging for the average exhaust of the outdoor machine system；In the average exhaust of each outdoor unit
When temperature and the unequal average exhaust of the outdoor machine system, carrying out the average exhaust of each outdoor unit is
The 3rd of the no average exhaust more than outdoor machine system judges；Lead to where the electric expansion valve of each outdoor unit
Whether the degree of superheat on road is more than the second judgement of the first preset value；In the 3rd judged result be "Yes" and the second judged result is
During "Yes", then increase the aperture of the electric expansion valve；When in the 3rd judged result be "No" and the second judged result is "Yes",
Then reduce the aperture of the electric expansion valve.The refrigerant solved by the method for the present invention in multi-connected air conditioning system distributes
The problem of uneven, especially realize in the multi-connected air conditioning system of injection increasing enthalpy, spray electric expansion valve by controlling
Aperture, effectively control the delivery temperature of system.
Brief description of the drawings
Fig. 1 is the structural representation of multi-connected air conditioning system of the present invention.
Fig. 2 is the schematic flow sheet of the control method first embodiment of multi-connected air conditioner of the present invention；
Fig. 3 is the schematic flow sheet of the control method second embodiment of multi-connected air conditioner of the present invention；
Fig. 4 is the schematic flow sheet of the control method 3rd embodiment of multi-connected air conditioner of the present invention；
Fig. 5 is the schematic flow sheet of the control method fourth embodiment of multi-connected air conditioner of the present invention；
Fig. 6 is the schematic flow sheet of the embodiment of control method the 5th of multi-connected air conditioner of the present invention；
Fig. 7 is the module map of multi-connected air conditioning system of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
The present invention provides a kind of control method of multi-connected air conditioner, and methods described is applied to the multi-connected air conditioning system
In, the multi-connected air conditioning system includes at least two outdoor units in parallel and at least two indoor sets in parallel, the interior
Machine is corresponded with the outdoor unit and connected；The pipeline structure of the outdoor unit includes gas-liquid separator 20, compressor set, outdoor
Heat exchanger 30, reversal valve 40, electric expansion valve 50, injection electric expansion valve 60, high-pressure stop valve 70 and low-pressure shutoff valve 80；Institute
It is four-way valve to state reversal valve.The connected mode of outdoor unit pipeline is the conventional connected mode in this area, referring to Fig. 1, herein no longer
Repeat one by one.And the multiple air conditioner in the present embodiment is adjusted to air-injection enthalpy adding type system, the compressor in the compressor set is
Air injection enthalpy-increasing compressor.In this air injection enthalpy-increasing system, the electric expansion valve includes injection electric expansion valve 60 and routine
Electric expansion valve 50.The aperture of control electric expansion valve described in the present embodiment refers to opening for control injection electric expansion valve 60
Degree.
In the first embodiment, comprise the following steps referring to Fig. 2, the control method of the multi-connected air conditioner：
Whether step S10, the degree of superheat for detecting each outdoor unit reach target call；
In the present embodiment, whether the degree of superheat for first detecting each outdoor unit reaches target call, to judge each institute
Whether the compressor for stating outdoor unit is in normal operating conditions.When the degree of superheat of the outdoor unit is higher than desired value, it is probably then
Because the different or indoor load of the resistance of the pipeline of refrigerant flowing is different, causes the degree of superheat of outdoor unit too high, make outdoor
The compressor of machine is in overload state.Now, the flux of refrigerant should first be adjusted so that the degree of superheat of outdoor unit reaches target
Value.Secondly, it is probably the state inflow due to refrigerant with gas-liquid two-phase if the degree of superheat of the outdoor unit is less than desired value
Compressor, compressor is caused damage；Therefore, the flux of the refrigerant of compressor need to be first reduced, in case refrigerant is with gas-liquid two
The refrigerant of phase is flowed into compressor, and whole system is caused damage.Only reach in the degree of superheat of each outdoor unit
During target call, just continue the operation of next step, the degree of superheat for otherwise needing first to adjust compressor reaches target call.
Step S20, when the degree of superheat of each outdoor unit reaches target call, carry out the flat of each outdoor unit
First judgement whether equal with the average exhaust of the outdoor machine system of equal delivery temperature；
When the degree of superheat of each outdoor unit reaches target call, being averaged for each outdoor unit is determined whether
Whether delivery temperature is equal with the difference of the average exhaust of the outdoor machine system.Only in the average exhaust temperature of outdoor unit
When the average exhaust of degree and the outdoor machine system is unequal, just need to be determined further.If both are equal,
Represent that the refrigerant of now outdoor unit is evenly distributed, system is relatively stable in other words is running, it is therefore not necessary to enter to system
Row further judges and adjusted.
Step S30, in the average exhaust and the average exhaust of the outdoor machine system of each outdoor unit
When unequal, whether the degree of superheat of path where carrying out the electric expansion valve of each outdoor unit is more than the of the first preset value
Two judge；
First in the above-mentioned average exhaust to the outdoor unit and the average exhaust of outdoor machine system judges
On the basis of, it is default whether the degree of superheat of path where further judging the electric expansion valve of the outdoor unit is more than first
Value, wherein electric expansion valve herein refers to the injection electric expansion valve in the system.Injection electricity is limited during first preset value
State when sub- expansion valve is in operable, i.e., when the injection electric expansion valve is more than first preset value, can adjust spray
Penetrate the aperture of electric expansion valve.
It should be noted that the definition mode of the degree of superheat of the injection electric expansion valve is as follows：Reference picture 1, injection electricity
The temperature T1 and T2 that are detected at sub- expansion valve difference are the degree of superheat of path where the injection electric expansion valve.
Step S40, it is default to be more than first for the degree of superheat of path where each electric expansion valve for carrying out the outdoor unit
Whether value, the average exhaust for carrying out each outdoor unit are more than the average exhaust of outdoor machine system and the 3rd sentence
It is disconnected；
Further, in the average exhaust and the average exhaust of the outdoor machine system for obtaining the outdoor unit
When unequal, judge whether the average exhaust of each outdoor unit is more than the average exhaust temperature of the outdoor machine system
Degree.It should be noted that judging whether the average exhaust of each outdoor unit is more than being averaged for the outdoor machine system
Delivery temperature is individually to go to judge the average exhaust of each outdoor unit and the average exhaust of outdoor machine system, each
The judgement of outdoor unit is independent.Also, the average exhaust of the average exhaust and outdoor machine system simply by the presence of outdoor unit
Temperature is unequal, then judges that the outdoor unit needs to adjust, so that its average exhaust tends to the average exhaust of outdoor machine system
Temperature.
Wherein, the average exhaust of each outdoor unit is the exhaust temperature of compressor of each outdoor unit in it
The average value of degree.Such as when the average exhaust that three outdoor units, three outdoor units be present is set to TP1, TP2 and TP3, every
Outdoor unit includes two compressors, the delivery temperature of compressor be respectively TP1C1, TP1C2, TP2C1, TP2C2, TP3C1,
TP3C2, then the average exhaust TP1=(TP1C1+TP1C2) of three outdoor units/2, TP2=(TP2C1+TP2C2)/
2, TP3=(TP3C1+TP3C2)/2.The average exhaust of the outdoor machine system is the average exhaust of three outdoor units
Average value, the average exhaust of the outdoor machine system is set to TP, then TP=(TP1+TP2+TP3)/3.
Step S50, when the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；Judge the 3rd
When being as a result "No", then the aperture of the electric expansion valve is reduced.
It is as follows to the processing mode of above-mentioned judged result：Be "Yes" in the 3rd judged result, i.e., described outdoor unit
Average exhaust be more than the outdoor machine system average exhaust, show being averaged for this outdoor unit in this case
Delivery temperature is higher than the delivery temperature of whole outdoor machine system, shows that the refrigerant of now this outdoor unit is on the low side, then this
When need increase refrigerant flux.The degree of superheat of path where spraying electric expansion valve is then determined whether in this case
Whether first preset value is reached.When the degree of superheat of path where spraying electric expansion valve is not up to the first preset value, due to this
The refrigerant flowed through in the injection electric expansion valve at place is directly to spray back compressor, if the degree of superheat at injection electric expansion valve
Not in the first preset value, now if opening injection electric expansion valve refrigerant may be caused to be flowed into pressure in liquid form
Contracting machine, that will make compressor produce hydrops, infringement will be produced to compressor.So need elder generation before injection electric expansion valve is opened
Judge whether path where spraying electric expansion valve reaches the first preset value, it is default to reach first in the injection electric expansion valve
During value, then the injection electric expansion valve is controlled to increase on the basis of current aperture to preset aperture, to increase from there
The refrigerant of the compressor of this outdoor unit is flowed into, and then reduces the delivery temperature of the compressor of this outdoor unit.
In addition, when the 3rd is judged as "No", i.e., it is less than outdoor machine system in the average exhaust of the outdoor unit
During average exhaust, show that the delivery temperature of the now compressor of the outdoor unit is too low, namely the compressor of the outdoor unit
Refrigerant amount is more, it is therefore desirable to the refrigerant flow of the compressor of this outdoor unit is reduced by control valve.Likewise,
It is default first to judge whether the degree of superheat for spraying the place path of electric expansion valve reaches first before control injection electric expansion valve
Value, when the degree of superheat of path where the injection electric expansion valve reaches the first preset value, work as in the injection electric expansion valve
The aperture of injection electric expansion valve is reduced on the basis of preceding aperture, and then reduces the compressor that refrigerant is flowed into this outdoor unit
Interior flow.
It should be noted that when the degree of superheat of path where the injection electric expansion valve is not up to the first preset value,
The flow of the refrigerant of the compressor of outdoor unit can be controlled by controlling the aperture of the conventional electrical expansion valve on main road, or
Person controls the frequency of compressor to balance the delivery temperature of compressor.
Explanation is needed further exist for, the first of the degree of superheat of path where spraying electric expansion valve described in the present embodiment
The setting of preset value is can be modified with the change of environment temperature, and the Standard General of the first default settings is greater than
5 DEG C, it can specifically be set as needed.
In addition, when the degree of superheat of path where the injection electric expansion valve is not up to the first preset value, then further
Judge whether the degree of superheat of path where spraying electric expansion valve is less than the second preset value, wherein the second preset value be with it is first pre-
If being worth related positive number, the second preset value is less than the first preset value.The overheat of path where the injection electric expansion valve
When degree is less than the second preset value, then the aperture for keeping injection electric expansion valve current keeps constant.
The present embodiment is by detecting whether the degree of superheat of each outdoor unit reaches target call；In each outdoor
When the degree of superheat of machine reaches target call, the average exhaust of each outdoor unit and putting down for the outdoor machine system are carried out
Equal delivery temperature whether equal first judges；Average exhaust and the outdoor machine system in each outdoor unit
Average exhaust it is unequal when, whether the degree of superheat of path is more than where carrying out the electric expansion valve of each outdoor unit
The second of first preset value judges；The degree of superheat of path is more than first where each electric expansion valve for carrying out the outdoor unit
Whether preset value, the average exhaust of each outdoor unit of progress are more than the 3rd of the average exhaust of outdoor machine system
Judge；When the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；It is "No" in the 3rd judged result
When, then reduce the aperture of the electric expansion valve.By the method for the present embodiment, opening for electric expansion valve is sprayed by controlling
Degree, solve the problems, such as that the refrigerant distribution in multi-connected air conditioning system is uneven, especially realize in the multi-joint of injection increasing enthalpy
The problem of delivery temperature of system is effectively controlled in formula air-conditioning system.
Further, referring to Fig. 3, the control method first embodiment based on multi-connected air conditioner of the present invention, in the present invention
In the control method second embodiment of multi-connected air conditioner, above-mentioned steps S10 includes：
Step S11, obtain the delivery temperature of each outdoor unit；
Step S12, the minimum delivery temperature in all outdoor units is relatively obtained according to the delivery temperature obtained；
Whether step S13, the degree of superheat for detecting outdoor unit corresponding to the minimum delivery temperature reach target call.
In the present embodiment, by obtaining the delivery temperature of each outdoor unit, and then according to the delivery temperature obtained
Compare to obtain the minimum delivery temperature in all delivery temperatures, further judge outdoor unit corresponding to the minimum delivery temperature
Whether the degree of superheat reaches target call.If the degree of superheat of the outdoor unit corresponding to minimum delivery temperature can reach target call,
That shows that other delivery temperatures can also reach target call higher than the degree of superheat of outdoor unit corresponding to the minimum delivery temperature.Cause
This, only need to judge whether the degree of superheat of outdoor unit corresponding to the minimum delivery temperature reaches target call.
, wherein it is desired to explanation, above-mentioned obtains the every outdoor referred in each delivery temperature of the outdoor unit
The average of the delivery temperature of all compressors of machine, compare to obtain minimum delivery temperature from the delivery temperature of all outdoor units.
Minimum delivery temperature in delivery temperature of the present embodiment by obtaining all outdoor units, and judge the minimum exhaust
Whether the degree of superheat of the outdoor unit corresponding to temperature reaches target call, in the mistake of the outdoor unit corresponding to the minimum delivery temperature
When temperature reaches target call, can determine whether out the degree of superheat of other outdoor units can reach target call.Without to all rooms
The degree of superheat of outer machine is judged, improves operating efficiency.
Further, referring to Fig. 4, the control method second embodiment based on multi-connected air conditioner of the present invention, in the present invention
In the control method 3rd embodiment of multi-connected air conditioner, the step S20 includes：
Step S21, obtain each average exhaust of the outdoor unit and the average exhaust of the outdoor machine system
Temperature；
Step S22, calculate the average exhaust of acquired each outdoor unit and the outdoor machine system
Difference between average exhaust；
Step S23, when the difference is zero, then it is judged as the average exhaust of each outdoor unit and the room
The average exhaust of outer machine system is equal；
Step S24, when the difference is not zero, then be judged as the average exhaust of each outdoor unit with it is described
The average exhaust of outdoor machine system is unequal.
In the present embodiment, made the difference by the average exhaust to outdoor unit and the average exhaust of outdoor machine system
Method judges whether the average exhaust of outdoor unit is equal with the average exhaust of outdoor machine system.So that further just
In judging whether outdoor unit needs to carry out follow-up operation.
Further, referring to Fig. 5, in the control method fourth embodiment of multi-connected air conditioner of the present invention, in the step
S50 also includes：
Step S51, when the 3rd judged result is "Yes", judge the outdoor unit electric expansion valve open degree whether
Less than maximum opening；
Step S52, when the aperture of the electric expansion valve of the outdoor unit is less than maximum opening, control the electronic expansion
Valve increases aperture on the basis of current aperture.
In the present embodiment, average exhaust being averaged higher than outdoor machine system of the compressor of the outdoor unit is being obtained
Delivery temperature, and when the degree of superheat of path where the injection electric expansion valve is more than the first preset value, then determine whether this
Whether the current aperture of injection electric expansion valve has reached its maximum opening that can reach.When the injection electric expansion valve reaches
During the maximum opening that can reach to it, show that now the injection electric expansion valve can not be further added by aperture.Therefore, only spraying
Penetrate the current aperture of electric expansion valve also be not up to maximum opening when, could continue control injection electric expansion valve increase aperture.
So when detecting that injection electric expansion valve is also not up to maximum opening, control injection electric expansion valve is current
Increase aperture on the basis of aperture, to increase the refrigerant flow of the compressor of the outdoor unit, to reduce its delivery temperature.
Whether the present embodiment reaches maximum opening by the aperture for judging to spray electric expansion valve, and then judges injection electricity
Whether sub- expansion valve can also continue on.The accuracy to spraying electronic expansion valve controls is improved, while also to spraying electronics
Expansion valve and whole system play a part of protection.
Further, referring to Fig. 5, in another embodiment, also include after the step S50：
Step S53, when the 3rd judged result is "No", judge the outdoor unit electric expansion valve open degree whether
More than minimum aperture；
Step S54, when the aperture of the electric expansion valve of the outdoor unit is more than minimum aperture, then control the electronics swollen
Swollen valve reduces aperture on the basis of current aperture.
In the present embodiment, it is less than being averaged for outdoor machine system in the average exhaust for obtaining the compressor of the outdoor unit
Delivery temperature, and when the degree of superheat of path where the injection electric expansion valve is more than the first preset value, then determine whether this
Whether the current aperture of injection electric expansion valve has reached its minimum aperture that can reach.When the injection electric expansion valve reaches
During the minimum aperture that can reach to it, show that now the injection electric expansion valve can not reduce aperture again.Therefore, only spraying
Penetrate the current aperture of electric expansion valve also be not up to minimum aperture when, could continue control injection electric expansion valve reduce aperture.
So when detecting that injection electric expansion valve is also not up to maximum opening, control injection electric expansion valve is current
Increase aperture on the basis of aperture, to increase the refrigerant flow of the compressor of the outdoor unit, to reduce its delivery temperature.
Whether the present embodiment reaches minimum aperture by the aperture for judging to spray electric expansion valve, and then judges injection electricity
Whether sub- expansion valve, which can also continue, is closed.The accuracy to spraying electronic expansion valve controls is improved, while also to spraying electronics
Expansion valve and whole system play a part of protection.
Further, in another embodiment, reference picture 6, methods described also include：
Step S00, obtain the delivery temperature of each outdoor unit；
Step S01, whether within a preset range to judge the delivery temperature of compressor of each outdoor unit；
Step S02, when the delivery temperature of the compressor of the outdoor unit exceedes preset range, then send fault-signal.
In the present embodiment, the delivery temperature of the compressor by obtaining each outdoor unit.And then judge each outdoor
Whether within a preset range, in the delivery temperature of the compressor delivery temperature of the compressor of machine exceedes preset range, then sends out
Be out of order signal.The preset range is the exhaust temperature ranges under compressor normal operating conditions, specifically can be according to the reality of system
Border situation is set.
By detecting the delivery temperature of each compressor whether in normal preset range, to be broken down in compressor
When give a warning in time, prevent compressor from being worked under failure and causing bigger infringement.
The present invention further provides a kind of multi-connected air conditioning system 100, referring to Fig. 1 and 7, the multi-connected air conditioning system bag
Include at least two outdoor units, every outdoor unit includes at least one compressor 10, and at least two outdoor units are into room
Outer machine system；The outdoor unit also includes reversal valve 40, gas-liquid separator 20, the outdoor heat exchanger connected on outdoor unit pipeline
30th, electric expansion valve, high-pressure stop valve 70 and low-pressure shutoff valve 80；The reversal valve is four-way valve.The company of outdoor unit pipeline
Mode is connect as the conventional connected mode in this area, referring to Fig. 1, this is no longer going to repeat them.And the multiple in the present embodiment
Air-conditioning is air-injection enthalpy adding type system, and the compressor in the compressor set is air injection enthalpy-increasing compressor.In this air injection enthalpy-increasing system
In, the electric expansion valve includes injection electric expansion valve 60 and conventional electrical expansion valve 50.The multi-connected air conditioning system
100 also include：Memory 101, processor 102 and it is stored on the memory 101 and can be run on the processor 102
Multi-connected air conditioner control program, when the control program of the multi-connected air conditioner is performed by the processor 102 realize it is as follows
The step of described method
Whether the degree of superheat of each outdoor unit of detection reaches target call；
When the degree of superheat of each outdoor unit reaches target call, the average exhaust temperature of each outdoor unit is carried out
Degree and the average exhaust of the outdoor machine system whether equal first judgement；
In the average exhaust of each outdoor unit and the unequal average exhaust of the outdoor machine system,
Whether the degree of superheat of path where carrying out the electric expansion valve of each outdoor unit, which is more than the second of the first preset value, judges；
The degree of superheat of path is more than the first preset value where each electric expansion valve for carrying out the outdoor unit, carries out every
Whether the average exhaust of the individual outdoor unit is more than the 3rd judgement of the average exhaust of outdoor machine system；
When the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；It is in the 3rd judged result
During "No", then the aperture of the electric expansion valve is reduced.
In the present embodiment, whether the degree of superheat for first detecting each outdoor unit reaches target call, to judge each institute
Whether the compressor for stating outdoor unit is in normal operating conditions.When the degree of superheat of the outdoor unit is higher than desired value, it is probably then
Because the different or indoor load of the resistance of the pipeline of refrigerant flowing is different, causes the degree of superheat of outdoor unit too high, make outdoor
The compressor of machine is in overload state.Now, the flux of refrigerant should first be adjusted so that the degree of superheat of outdoor unit reaches target
Value.Secondly, it is probably the state inflow due to refrigerant with gas-liquid two-phase if the degree of superheat of the outdoor unit is less than desired value
Compressor, compressor is caused damage；Therefore, the flux of the refrigerant of compressor need to be first reduced, in case refrigerant is with gas-liquid two
The refrigerant of phase is flowed into compressor, and whole system is caused damage.Only reach in the degree of superheat of each outdoor unit
During target call, just continue the operation of next step, the degree of superheat for otherwise needing first to adjust compressor reaches target call.
When the degree of superheat of each outdoor unit reaches target call, reach mesh in the degree of superheat of each outdoor unit
When mark requires, the average exhaust of each outdoor unit and the average exhaust of the outdoor machine system are determined whether
Difference whether reach preset value.The preset value can be configured as needed, in the average exhaust of each outdoor unit
When the difference of temperature and the average exhaust of the outdoor machine system is in preset value, then show now each outdoor unit
Average exhaust and the average exhaust of the outdoor machine system be more or less the same, belong to acceptable and stir in the range of,
Then the operation of outdoor unit need not be now adjusted.But if the average exhaust and outdoor unit of each outdoor unit
The difference of the average exhaust of system exceedes preset value, then shows that the average exhaust of now each outdoor unit deviates outdoor
The average exhaust of machine system is larger, may will influence the normal operation of outdoor unit, it is therefore desirable to take measures to adjust its row
Temperature degree makes it tend to the average exhaust of outdoor machine system.
First in the above-mentioned average exhaust to the outdoor unit and the average exhaust of outdoor machine system judges
On the basis of, whether the degree of superheat of path is more than preset value where further judging the electric expansion valve of the outdoor unit, its
In injection electric expansion valve in the system for referring to of electric expansion valve herein.It is swollen that injection electronics is limited during first preset value
State when swollen valve is in operable, i.e., when the injection electric expansion valve is more than first preset value, injection electricity can be adjusted
The aperture of sub- expansion valve.
It should be noted that the definition mode of the degree of superheat of the injection electric expansion valve is as follows：Reference picture 1, injection electricity
The temperature T1 and T2 that are detected at sub- expansion valve difference are the degree of superheat of path where the injection electric expansion valve.
Further, in the average exhaust and the average exhaust of the outdoor machine system for obtaining the outdoor unit
When unequal, judge whether the average exhaust of each outdoor unit is more than the average exhaust temperature of the outdoor machine system
Degree.It should be noted that judging whether the average exhaust of each outdoor unit is more than being averaged for the outdoor machine system
Delivery temperature is individually to go to judge the average exhaust of each outdoor unit and the average exhaust of outdoor machine system, each
The judgement of outdoor unit is independent.Also, the average exhaust of the average exhaust and outdoor machine system simply by the presence of outdoor unit
Temperature is unequal, then judges that the outdoor unit needs to adjust, so that its average exhaust tends to the average exhaust of outdoor machine system
Temperature.
Wherein, the average exhaust of each outdoor unit is the exhaust temperature of compressor of each outdoor unit in it
The average value of degree.Such as when the average exhaust that three outdoor units, three outdoor units be present is set to TP1, TP2 and TP3, every
Outdoor unit includes two compressors, the delivery temperature of compressor be respectively TP1C1, TP1C2, TP2C1, TP2C2, TP3C1,
TP3C2, then the average exhaust TP1=(TP1C1+TP1C2) of three outdoor units/2, TP2=(TP2C1+TP2C2)/
2, TP3=(TP3C1+TP3C2)/2.The average exhaust of the outdoor machine system is the average exhaust of three outdoor units
Average value, the average exhaust of the outdoor machine system is set to TP, then TP=(TP1+TP2+TP3)/3.
It is as follows to the processing mode of above-mentioned judged result：Be "Yes" in first judged result, i.e., described outdoor unit
Average exhaust be more than the outdoor machine system average exhaust, show being averaged for this outdoor unit in this case
Delivery temperature is higher than the delivery temperature of whole outdoor machine system, shows that the refrigerant of now this outdoor unit is on the low side, then this
When need increase refrigerant flux.The degree of superheat of path where spraying electric expansion valve is then determined whether in this case
Whether first preset value is reached.When the degree of superheat of path where spraying electric expansion valve is not up to the first preset value, due to this
The refrigerant flowed through in the injection electric expansion valve at place is directly to spray back compressor, if the overheat at injection electric expansion valve
Degree now may cause refrigerant to be flowed into liquid form not in the first preset value if opening injection electric expansion valve
Compressor, that will make compressor produce liquid product, infringement will be produced to compressor.So needed before injection electric expansion valve is opened
First judge whether path where spraying electric expansion valve reaches the first preset value, it is pre- to reach first in the injection electric expansion valve
If during value, then the injection electric expansion valve is controlled to increase on the basis of current aperture to preset aperture, to increase from this
Place flows into the refrigerant of the compressor of this outdoor unit, to reduce the delivery temperature of the compressor of this outdoor unit.
In addition, when first is judged as "No", i.e., it is less than outdoor machine system in the average exhaust of the outdoor unit
During average exhaust, show that the delivery temperature of the now compressor of the outdoor unit is too low, namely the compressor of the outdoor unit
Refrigerant amount is more, it is therefore desirable to the refrigerant flow of the compressor of this outdoor unit is reduced by control valve.Likewise,
It is default first to judge whether the degree of superheat for spraying the place path of electric expansion valve reaches first before control injection electric expansion valve
Value, when the degree of superheat of path where the injection electric expansion valve reaches the first preset value, work as in the injection electric expansion valve
The aperture of injection electric expansion valve is reduced on the basis of preceding aperture, and then reduces the compressor that refrigerant is flowed into this outdoor unit
Interior flow.
It should be noted that when the degree of superheat of path where the injection electric expansion valve is not up to the first preset value,
The flow of the refrigerant of the compressor of outdoor unit can be controlled by controlling the aperture of the conventional electrical expansion valve on main road, or
Person controls the frequency of compressor to balance the delivery temperature of compressor.
Explanation is needed further exist for, the first of the degree of superheat of path where spraying electric expansion valve described in the present embodiment
The setting of preset value is can be modified with the change of environment temperature, and the Standard General of the first default settings is greater than
5 DEG C, it can specifically be set as needed.
In addition, when the degree of superheat of path where the injection electric expansion valve is not up to the first preset value, then further
Judge whether the degree of superheat of path where spraying electric expansion valve is less than the second preset value, wherein the second preset value be with it is first pre-
If being worth related positive number, the second preset value is less than the first preset value.The overheat of path where the injection electric expansion valve
When degree is less than the second preset value, then the aperture for keeping injection electric expansion valve current keeps constant.
The present embodiment is by detecting whether the degree of superheat of each outdoor unit reaches target call；In each outdoor
When the degree of superheat of machine reaches target call, the average exhaust of each outdoor unit and putting down for the outdoor machine system are carried out
Equal delivery temperature whether equal first judges；Average exhaust and the outdoor machine system in each outdoor unit
Average exhaust it is unequal when, whether the degree of superheat of path is more than where carrying out the electric expansion valve of each outdoor unit
The second of first preset value judges；The degree of superheat of path is more than first where each electric expansion valve for carrying out the outdoor unit
Whether preset value, the average exhaust of each outdoor unit of progress are more than the 3rd of the average exhaust of outdoor machine system
Judge；When the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；It is "No" in the 3rd judged result
When, then reduce the aperture of the electric expansion valve.By the method for the present embodiment, opening for electric expansion valve is sprayed by controlling
Degree, solve the problems, such as that the refrigerant distribution in multi-connected air conditioning system is uneven, especially realize in the multi-joint of injection increasing enthalpy
The problem of delivery temperature of system is effectively controlled in formula air-conditioning system.
Further, in one embodiment, it is real when the control program of the multi-connected air conditioner is performed by the processor 102
Now following method and step：
Obtain the delivery temperature of each outdoor unit；
Minimum delivery temperature in all outdoor units is relatively obtained according to the delivery temperature obtained；
Whether the degree of superheat for detecting outdoor unit corresponding to the minimum delivery temperature reaches target call.
In the present embodiment, by obtaining the delivery temperature of each outdoor unit, and then according to the delivery temperature obtained
Compare to obtain the minimum delivery temperature in all delivery temperatures, further judge outdoor unit corresponding to the minimum delivery temperature
Whether the degree of superheat reaches target call.If the degree of superheat of the outdoor unit corresponding to minimum delivery temperature can reach target call,
That shows that other delivery temperatures can also reach target call higher than the degree of superheat of outdoor unit corresponding to the minimum delivery temperature.Cause
This, only need to judge whether the degree of superheat of outdoor unit corresponding to the minimum delivery temperature reaches target call.
, wherein it is desired to explanation, above-mentioned obtains the every outdoor referred in each delivery temperature of the outdoor unit
The delivery temperature of all outdoor units of machine, compare to obtain minimum delivery temperature from the delivery temperature of all outdoor units.
Minimum delivery temperature in delivery temperature of the present embodiment by obtaining all outdoor units, and judge the minimum exhaust
Whether the degree of superheat of the outdoor unit corresponding to temperature reaches target call, in the mistake of the outdoor unit corresponding to the minimum delivery temperature
When temperature reaches target call, can determine whether out the degree of superheat of other outdoor units can reach target call.Without to all rooms
The degree of superheat of outer machine is judged, improves operating efficiency.
Further, in one embodiment, it is real when the control program of the multi-connected air conditioner is performed by the processor 102
Now following method and step：
Obtain each average exhaust of the outdoor unit and the average exhaust of the outdoor machine system；
Calculate the acquired average exhaust of each outdoor unit and the average exhaust of the outdoor machine system
Difference between temperature；
When the difference is zero, then it is judged as the average exhaust of each outdoor unit and the outdoor machine system
Average exhaust it is equal；
When the difference is not zero, then it is judged as the average exhaust of each outdoor unit and the outdoor unit system
The average exhaust of system is unequal.
In the present embodiment, made the difference by the average exhaust to outdoor unit and the average exhaust of outdoor machine system
Method judges whether the average exhaust of outdoor unit is equal with the average exhaust of outdoor machine system.So that further just
In judging whether outdoor unit needs to carry out follow-up operation.
Further, in other embodiments, when the control program of the multi-connected air conditioner is performed by the processor 102
Realize following method and step：
When the 3rd judged result is "Yes", judge whether the open degree of the electric expansion valve of the outdoor unit is less than maximum
Aperture；
When the aperture of the electric expansion valve of the outdoor unit is less than maximum opening, the electric expansion valve is controlled current
Increase aperture on the basis of aperture.
In the present embodiment, average exhaust being averaged higher than outdoor machine system of the compressor of the outdoor unit is being obtained
Delivery temperature, and when the degree of superheat of path where the injection electric expansion valve is more than the first preset value, then determine whether this
Whether the current aperture of injection electric expansion valve has reached its maximum opening that can reach.When the injection electric expansion valve reaches
During the maximum opening that can reach to it, show that now the injection electric expansion valve can not be further added by aperture.Therefore, only spraying
Penetrate the current aperture of electric expansion valve also be not up to maximum opening when, could continue control injection electric expansion valve increase aperture.
So when detecting that injection electric expansion valve is also not up to maximum opening, control injection electric expansion valve is current
Increase aperture on the basis of aperture, to increase the refrigerant flow of the compressor of the outdoor unit, to reduce its delivery temperature.
Whether the present embodiment reaches maximum opening by the aperture for judging to spray electric expansion valve, and then judges injection electricity
Whether sub- expansion valve can also continue on.The accuracy to spraying electronic expansion valve controls is improved, while also to spraying electronics
Expansion valve and whole system play a part of protection.
Further, in other embodiments, when the control program of the multi-connected air conditioner is performed by the processor 102
Realize following method and step：
When the 3rd judged result is "No", judge whether the open degree of the electric expansion valve of the outdoor unit is more than minimum
Aperture；
When the aperture of the electric expansion valve of the outdoor unit is more than minimum aperture, then the electric expansion valve is controlled to work as
Reduce aperture on the basis of preceding aperture.
In the present embodiment, it is less than being averaged for outdoor machine system in the average exhaust for obtaining the compressor of the outdoor unit
Delivery temperature, and when the degree of superheat of path where the injection electric expansion valve is more than the first preset value, then determine whether this
Whether the current aperture of injection electric expansion valve has reached its minimum aperture that can reach.When the injection electric expansion valve reaches
During the minimum aperture that can reach to it, show that now the injection electric expansion valve can not reduce aperture again.Therefore, only spraying
Penetrate the current aperture of electric expansion valve also be not up to minimum aperture when, could continue control injection electric expansion valve reduce aperture.
So when detecting that injection electric expansion valve is also not up to maximum opening, control injection electric expansion valve is current
Increase aperture on the basis of aperture, to increase the refrigerant flow of the compressor of the outdoor unit, to reduce its delivery temperature.
Whether the present embodiment reaches minimum aperture by the aperture for judging to spray electric expansion valve, and then judges injection electricity
Whether sub- expansion valve, which can also continue, is closed.The accuracy to spraying electronic expansion valve controls is improved, while also to spraying electronics
Expansion valve and whole system play a part of protection.
Further, in other embodiments, when the control program of the multi-connected air conditioner is performed by the processor 102
Realize following method and step：
Obtain the delivery temperature of the compressor of each outdoor unit；
Whether within a preset range to judge the delivery temperature of the compressor of each outdoor unit；
When the delivery temperature of the compressor of the outdoor unit exceedes preset range, then fault-signal is sent.
In the present embodiment, the delivery temperature of the compressor by obtaining each outdoor unit.And then judge each outdoor
Whether within a preset range, in the delivery temperature of the compressor delivery temperature of the compressor of machine exceedes preset range, then sends out
Be out of order signal.The preset range is the exhaust temperature ranges under compressor normal operating conditions, specifically can be according to the reality of system
Border situation is set.
By detecting the delivery temperature of each compressor whether in normal preset range, to be broken down in compressor
When give a warning in time, prevent compressor from being worked under failure and causing bigger infringement.
In addition, the embodiment of the present invention also proposes a kind of computer-readable recording medium, the computer-readable recording medium
On be stored with the control program of multi-connected air conditioner, realized such as when the control program of the multi-connected air conditioner is performed by processor 102
Method and step described in above-described embodiment.
The preferred embodiments of the present invention are these are only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of control method of multi-connected air conditioner, it is characterised in that the multi-connected air conditioner includes at least two outdoor units, often
Outdoor unit described in platform includes at least one compressor, and at least two outdoor units are into outdoor machine system；The multiple air conditioner
The control method of tune comprises the following steps：
Whether the degree of superheat of each outdoor unit of detection reaches target call；
When the degree of superheat of each outdoor unit reaches target call, carry out the average exhaust of each outdoor unit with
The first whether equal judgement of the average exhaust of the outdoor machine system；
In the average exhaust of each outdoor unit and the unequal average exhaust of the outdoor machine system, carry out
Whether the degree of superheat of path where the electric expansion valve of each outdoor unit, which is more than the second of the first preset value, judges；
The degree of superheat of path is more than the first preset value where each electric expansion valve for carrying out the outdoor unit, carries out each institute
State outdoor unit average exhaust whether be more than outdoor machine system average exhaust the 3rd judge；
When the 3rd judged result is "Yes", then increase the aperture of the electric expansion valve；When the 3rd judged result is "No",
Then reduce the aperture of the electric expansion valve.
2. the control method of multi-connected air conditioner according to claim 1, it is characterised in that each outdoor of detection
The step of whether degree of superheat of machine reaches target call includes：
Obtain the delivery temperature of each outdoor unit；
Minimum delivery temperature in all outdoor units is relatively obtained according to the delivery temperature obtained；
Whether the degree of superheat for detecting outdoor unit corresponding to the minimum delivery temperature reaches target call.
3. the control method of multi-connected air conditioner according to claim 1, it is characterised in that described to carry out each outdoor
The average exhaust of machine first judge the step of whether equal with the average exhaust of the outdoor machine system, includes：
Obtain each average exhaust of the outdoor unit and the average exhaust of the outdoor machine system；
Calculate the acquired average exhaust of each outdoor unit and the average exhaust of the outdoor machine system
Between difference；
When the difference is zero, then it is judged as the average exhaust of each outdoor unit and putting down for the outdoor machine system
Equal delivery temperature is equal；
When the difference is not zero, then it is judged as the average exhaust of each outdoor unit and the outdoor machine system
Average exhaust is unequal.
4. the control method of multi-connected air conditioner according to claim 1, it is characterised in that described to carry out each outdoor
Also include after the step of whether degree of superheat of path where the electric expansion valve of machine judges more than the second of the first preset value：
When the degree of superheat of path where the electric expansion valve of each outdoor unit is less than or equal to the first preset value, institute is judged
Whether the degree of superheat of path is less than the second preset value where stating electric expansion valve；
When the degree of superheat of path where the electric expansion valve is less than second preset value, then keep electric expansion valve current
Aperture it is constant.
5. the control method of multi-connected air conditioner according to claim 1, it is characterised in that described to be in the 3rd judged result
Include during "Yes", then the step of the aperture for increasing the electric expansion valve：
It is described when the 3rd judged result is "Yes", judge the outdoor unit electric expansion valve open degree whether be less than maximum
Aperture；
When the aperture of the electric expansion valve of the outdoor unit is less than maximum opening, the electric expansion valve is controlled in current aperture
On the basis of increase aperture.
6. the control method of multi-connected air conditioner according to claim 1, it is characterised in that described to be in the 3rd judged result
Include during "No", then the step of the aperture for reducing the electric expansion valve：
It is described when the 3rd judged result is "No", judge the outdoor unit electric expansion valve open degree whether be less than minimum
Aperture；
When the aperture of the electric expansion valve of the outdoor unit is more than minimum aperture, then the electric expansion valve is controlled to be opened currently
Reduce aperture on the basis of degree.
7. the control method of the multi-connected air conditioner according to any one of claim 1~6, it is characterised in that methods described is also
Including：
Obtain the delivery temperature of the compressor of each outdoor unit；
Whether within a preset range to judge the delivery temperature of the compressor of each outdoor unit；
When the delivery temperature of the compressor of the outdoor unit exceedes preset range, then fault-signal is sent.
8. the control method of the multi-connected air conditioner according to any one of claim 1~6, it is characterised in that described to carry out often
Whether the degree of superheat of path where the electric expansion valve of the individual outdoor unit is more than described in the second judgement of the first preset value
First preset value changes with the change of environment temperature.
9. a kind of multi-connected air conditioning system, it is characterised in that the multi-connected air conditioning system includes at least two outdoor units, every
The outdoor unit includes at least one compressor, and at least two outdoor units are into outdoor machine system；The outdoor unit also wraps
Include the reversal valve connected on outdoor unit pipeline, outdoor heat exchanger, gas-liquid separator, electric expansion valve, high-pressure stop valve and
Low-pressure shutoff valve；The multi-connected air conditioning system also includes：Memory, processor and it is stored on the memory and can be in institute
The control program of the multi-connected air conditioner run on processor is stated, the control program of the multi-connected air conditioner is by the computing device
The step of control method of multi-connected air conditioners of the Shi Shixian as described in claim any one of 1-8.
10. a kind of computer-readable recording medium, it is characterised in that be stored with multiple on the computer-readable recording medium
The control program of air-conditioning, realized when the control program of the multi-connected air conditioner is executed by processor such as any one of claim 1-8
The step of control method of described multi-connected air conditioner.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111928419A (en) * | 2020-07-14 | 2020-11-13 | 青岛海尔空调电子有限公司 | Control method and system for multi-split air conditioning unit |
| CN112283879A (en) * | 2020-09-22 | 2021-01-29 | 重庆大学 | Air conditioner sterilization control method and device and computer readable storage medium |
| CN112665112A (en) * | 2019-10-16 | 2021-04-16 | 广东美的制冷设备有限公司 | Air conditioner, control method thereof and readable storage medium |
| CN112762586A (en) * | 2021-01-21 | 2021-05-07 | 广东积微科技有限公司 | Frequency correction control method for parallel multi-split compressor |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1760411A1 (en) * | 2003-10-17 | 2007-03-07 | LG Electronics, Inc. | Method for controlling the super-heating degree in a heat pump system |
| CN202835949U (en) * | 2012-08-28 | 2013-03-27 | 广东美的电器股份有限公司 | Novel multiple on-line air conditioning system |
| CN103851847A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | System and method for controlling electronic expansion valve of air conditioner, and multi-split air conditioner outdoor unit |
| CN106288162A (en) * | 2016-08-08 | 2017-01-04 | 广东美的暖通设备有限公司 | A kind of defrosting enters decision method, system and air-conditioning |
| CN106482411A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔空调电子有限公司 | A kind of multi-gang air-conditioner compressor liquid impact prevention control method |
| CN107024027A (en) * | 2017-03-29 | 2017-08-08 | 广东美的暖通设备有限公司 | The control method of air-conditioning system and air-conditioning system |
-
2017
- 2017-09-18 CN CN201710848951.8A patent/CN107477934B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1760411A1 (en) * | 2003-10-17 | 2007-03-07 | LG Electronics, Inc. | Method for controlling the super-heating degree in a heat pump system |
| CN202835949U (en) * | 2012-08-28 | 2013-03-27 | 广东美的电器股份有限公司 | Novel multiple on-line air conditioning system |
| CN103851847A (en) * | 2012-12-03 | 2014-06-11 | 美的集团股份有限公司 | System and method for controlling electronic expansion valve of air conditioner, and multi-split air conditioner outdoor unit |
| CN106482411A (en) * | 2015-08-31 | 2017-03-08 | 青岛海尔空调电子有限公司 | A kind of multi-gang air-conditioner compressor liquid impact prevention control method |
| CN106288162A (en) * | 2016-08-08 | 2017-01-04 | 广东美的暖通设备有限公司 | A kind of defrosting enters decision method, system and air-conditioning |
| CN107024027A (en) * | 2017-03-29 | 2017-08-08 | 广东美的暖通设备有限公司 | The control method of air-conditioning system and air-conditioning system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665112A (en) * | 2019-10-16 | 2021-04-16 | 广东美的制冷设备有限公司 | Air conditioner, control method thereof and readable storage medium |
| CN112665112B (en) * | 2019-10-16 | 2022-04-05 | 广东美的制冷设备有限公司 | Air conditioner, control method thereof and readable storage medium |
| CN111928419A (en) * | 2020-07-14 | 2020-11-13 | 青岛海尔空调电子有限公司 | Control method and system for multi-split air conditioning unit |
| CN111928419B (en) * | 2020-07-14 | 2023-03-31 | 青岛海尔空调电子有限公司 | Control method and system for multi-split air conditioning unit |
| CN112283879A (en) * | 2020-09-22 | 2021-01-29 | 重庆大学 | Air conditioner sterilization control method and device and computer readable storage medium |
| CN112762586A (en) * | 2021-01-21 | 2021-05-07 | 广东积微科技有限公司 | Frequency correction control method for parallel multi-split compressor |
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|---|---|
| CN107477934B (en) | 2020-03-06 |
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