CN104006445B - Multi-connected air conditioner and control method thereof - Google Patents
Multi-connected air conditioner and control method thereof Download PDFInfo
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- CN104006445B CN104006445B CN201310061205.6A CN201310061205A CN104006445B CN 104006445 B CN104006445 B CN 104006445B CN 201310061205 A CN201310061205 A CN 201310061205A CN 104006445 B CN104006445 B CN 104006445B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003507 refrigerant Substances 0.000 claims abstract description 88
- 238000001704 evaporation Methods 0.000 claims abstract description 74
- 230000008020 evaporation Effects 0.000 claims abstract description 69
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 230000000630 rising effect Effects 0.000 claims 1
- 238000005057 refrigeration Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 8
- 230000001276 controlling effect Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 241000486406 Trachea Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
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Abstract
The invention discloses a multi-connected air conditioner and a control method thereof. Wherein, the multiple air conditioner includes: a compressor; the indoor units comprise a target indoor unit and a non-target indoor unit; the electronic expansion valves are respectively arranged on the liquid inlet pipes of the indoor units; and the controller is used for controlling the refrigerant evaporation superheat degree of the non-target indoor unit to be larger than the refrigerant evaporation superheat degree of the target indoor unit by adjusting the opening degrees of the plurality of electronic expansion valves. The invention solves the problem that the refrigeration effect of part of indoor units of the multi-connected air conditioner in the prior art is poor, thereby achieving the purpose of improving the overall refrigeration effect of the multi-connected air conditioner.
Description
Technical field
The present invention relates to air-conditioner field, in particular to a kind of multi-connected air conditioner device and its control method.
Background technology
Using multi-connected air conditioner device（One or more off-premises station and multiple indoor sets）Simultaneously to multiple room systems
When cold, because the room area in each room is different with general layout, or indoor set type selecting is improper, and multi-connected air conditioner device can be caused to exist
During operation, some indoor sets are unsatisfactory for the demand in its place room；Meanwhile, also there is the specified system of indoor set in multi-connected air conditioner device
Cold summation exceedes connecting leg is long between off-premises station rated cooling capacity, off-premises station and some indoor sets, overall unit load is big etc.
Reason, these can cause part indoor set refrigeration bad.
There is a problem of that part indoor set refrigeration is poor for multi-connected air conditioner device in correlation technique, not yet carry at present
Go out effective solution.
The content of the invention
Present invention is primarily targeted at provide a kind of multi-connected air conditioner device and its control method, to solve prior art in
Multi-connected air conditioner device has that part indoor set refrigeration is poor.
To achieve these goals, according to an aspect of the invention, there is provided a kind of multi-connected air conditioner device, including：Pressure
Contracting machine；Multiple stage indoor set, multiple stage indoor set by target indoor set and non-targeted indoor units into；Multiple electric expansion valves, respectively
It is arranged on the feed tube of multiple stage indoor set；And controller, for the aperture by adjusting multiple electric expansion valves, control non-
The refrigerant evaporation degree of superheat of the refrigerant evaporation degree of superheat of target indoor set more than target indoor set.
Further, multi-connected air conditioner device also includes：Multiple first detector units, are respectively used to detect multiple stage indoor set
Enter liquid temp；And multiple second detector units, be respectively used to detect multiple stage indoor set air outlet temperature, wherein, controller with
Multiple first detector units are connected with multiple second detector units, for according to the refrigerant evaporation degree of superheat of the first indoor set
The aperture of electric expansion valve on the first indoor set is adjusted, wherein, the first indoor set is arbitrary indoor set in multiple stage indoor set,
The refrigerant evaporation degree of superheat of the first indoor set is the air outlet temperature and feed liquor temperature difference of the first indoor set.
Further, multiple first detector units are separately positioned on the first position of multiple stage indoor set feed tube, wherein,
First position on first indoor set feed tube is located between the first indoor set and the first electronic expansion, and the first electric expansion valve is
Electric expansion valve on first indoor set.
Further, controller is determined on target indoor set on electric expansion valve and non-targeted indoor set according to below equation
The aperture regulation amount of electric expansion valve：
Wherein, EXVMeshFor the aperture regulation amount of electric expansion valve on target indoor set, △ TMeshFor the refrigerant of target indoor set
Evaporation super heat value, EXVNon- meshFor the aperture regulation amount of electric expansion valve on non-targeted indoor set, △ TNon- meshFor non-targeted indoor set
Refrigerant evaporation super heat value, E1, E2 are parameter preset, and E1<E2.
Further, controller be additionally operable to control compressor running frequency at interval of Preset Time raise once, it is multi-joint
Formula air-conditioner also includes：3rd detector unit, is arranged on the air intake duct of compressor, for detecting the pressure at compressor air suction end
Value, wherein, controller is connected with the 3rd detector unit, for controlling compressor operating according to the pressure value at compressor air suction end
The lift-off value of frequency.
Further, controller determines the lift-off value of compressor operating frequency according to below equation：
K=C（TIt is low-TLow mesh）,
Wherein, K for compressor operating frequency lift-off value, TIt is lowFor the corresponding temperature value of pressure value at compressor air suction end,
TLow meshFor preset temperature value, C is parameter preset.
To achieve these goals, according to a further aspect in the invention, there is provided a kind of controlling party of multi-connected air conditioner device
Method, the multiple stage indoor set of multi-connected air conditioner device is by target indoor set with non-targeted indoor units into control method includes：By adjusting
The aperture of electric expansion valve on program mark indoor set and non-targeted indoor set, controls the refrigerant evaporation mistake of the non-targeted indoor set
The refrigerant evaporation degree of superheat of the temperature more than the target indoor set.
Further, control method also includes：The electric expansion valve on target indoor set and non-targeted indoor set is adjusted
While aperture, the running frequency for controlling compressor in multi-connected air conditioner device is raised once at interval of Preset Time.
Further, on target indoor set and non-targeted indoor set is adjusted while the aperture of electric expansion valve, control
The running frequency of compressor is raised at interval of Preset Time and once included in multi-connected air conditioner device：Obtain the switch of target indoor set
Machine state；The running frequency for starting to control compressor from the first moment is raised once at interval of Preset Time, wherein, the first moment
To get the moment of target indoor set start；And start to adjust on target indoor set and non-targeted indoor set from the first moment
The aperture of electric expansion valve.
Further, the aperture regulation amount of electronic expansion on target indoor set is determined in the following manner：Detection target chamber
Interior machine enters liquid temp and air outlet temperature；The air outlet temperature and feed liquor temperature difference of target indoor set are calculated, is obtained in target room
The refrigerant evaporation degree of superheat of machine；And the number of the difference of the refrigerant evaporation super heat value and the first parameter preset of determination target indoor set
It is worth for the aperture regulation amount of electric expansion valve on target indoor set, electronic expansion on non-targeted indoor set is determined in the following manner
Aperture regulation amount：That detects non-targeted indoor set enters liquid temp and air outlet temperature；Calculate the air outlet temperature of non-targeted indoor set
With feed liquor temperature difference, the refrigerant evaporation degree of superheat of non-targeted indoor set is obtained；And determine that the refrigerant of non-targeted indoor set steams
The numerical value for sending out the difference of super heat value and the second parameter preset is the aperture regulation amount of electric expansion valve on non-targeted indoor set, its
In, the first parameter preset is less than the second parameter preset.
Further, the lift-off value of compressor operating frequency is determined in the following manner：The pressure at detection compressor air suction end
Force value；The corresponding temperature value of pressure value at compressor air suction end is searched, wherein, the compressor that is stored with multi-connected air conditioner device is inhaled
The corresponding temperature value of different pressures value at gas end；And the preset multiple of the difference of temperature value and preset temperature is compressor fortune
The lift-off value of line frequency.
By the present invention, using the multi-connected air conditioner device for including following structure：Compressor；Multiple stage indoor set, in multiple stage room
Machine by target indoor set and non-targeted indoor units into；Multiple electric expansion valves, are separately positioned on the feed tube of multiple stage indoor set
On；And controller, for the aperture that control passes through the plurality of electric expansion valve of regulation, control the refrigerant of non-targeted indoor set
The refrigerant evaporation degree of superheat of the evaporation degree of superheat more than target indoor set.By in target room in controller regulation multi-connected air conditioner device
On machine on the aperture of electric expansion valve and non-targeted indoor set the aperture of electric expansion valve controlling the refrigerant of non-targeted indoor set
Evaporation the degree of superheat more than target indoor set the refrigerant evaporation degree of superheat, realize can using the poor indoor set of refrigeration as
Target indoor set, carrys out refrigerant that control targe indoor set gets more than the refrigerant that non-targeted indoor set is obtained, to ensure target
The refrigeration of indoor set.Solve multi-connected air conditioner device in prior art and have that part indoor set refrigeration is poor to ask
Topic, and then reached the integrally cooling effect for improving multi-connected air conditioner device.
Description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the schematic diagram of multi-connected air conditioner device according to embodiments of the present invention；And
Fig. 2 is the flow chart of control method according to embodiments of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
A kind of multi-connected air conditioner device, the multiple air conditioner for being provided the embodiment of the present invention below are be provided
Device is adjusted to be specifically introduced：
Fig. 1 is the schematic diagram of multi-connected air conditioner device according to embodiments of the present invention, as shown in figure 1, the embodiment is multi-joint
Formula air-conditioner includes：Off-premises station, multiple stage indoor set, multiple electric expansion valves, compressor and controller, wherein, SO is represented in Fig. 1
Outside, SI represent indoor, 10 expression tracheaes, 20 expression liquid pipes, 11 represent be arranged on 1# indoor sets tracheae temperature-sensitive bag,
21 represent that the tracheae temperature-sensitive bag being arranged on 2# indoor sets, 31 represent that the tracheae temperature-sensitive bag being arranged on 3# indoor sets, 12 represent
The liquid pipe temperature-sensitive bag that is arranged on 1# indoor sets, 22 represent that the liquid pipe temperature-sensitive bag being arranged on 2# indoor sets, 32 represent and are arranged on
Liquid pipe temperature-sensitive bag on 3# indoor sets, P1, P2 and P3 represent electric expansion valve.Compressor and controller not shown in Fig. 1, control
Device processed is the mainboard controller of multi-connected air conditioner device operation, and compressor and controller are arranged inside off-premises station, off-premises station and
Multiple stage indoor set passes through refrigerant pipe（Including tracheae and liquid pipe）Connection, also sets up an electricity on the feed tube of every indoor set
Sub- expansion valve, controller passes through the aperture for adjusting electric expansion valve on each indoor set, and the refrigerant for carrying out control targe indoor set steams
The refrigerant evaporation degree of superheat of the degree of superheat less than non-targeted indoor set is sent out, or is controlling to be adjusted while compressor operating frequency is raised
The aperture of electric expansion valve, if target indoor set is multiple stage indoor set, then controls cold on each target indoor set
Matchmaker's evaporation degree of superheat is respectively less than the refrigerant evaporation degree of superheat of non-targeted indoor set, when for non-targeted indoor set being multiple stage,
Equally it is that the refrigerant evaporation degree of superheat for controlling each target indoor set is respectively less than the refrigerant of any one non-targeted indoor set and steams
The degree of superheat is sent out, in embodiments of the present invention, target indoor set is set by the user, and can be the poor indoor set of refrigeration.
The multi-connected air conditioner device of the embodiment of the present invention, is controlled by adjusting the aperture of electric expansion valve on each indoor set
Refrigerant evaporation mistake of the refrigerant evaporation degree of superheat of target indoor set less than non-targeted indoor set in device control multi-connected air conditioner device processed
Temperature, realizes refrigerant that control targe indoor set gets more than the refrigerant that non-targeted indoor set is obtained, to ensure target chamber
The refrigeration of interior machine.Solve the problems, such as in prior art that multi-connected air conditioner device has a part indoor set refrigeration poor,
The integrally cooling effect for improving multi-connected air conditioner device is further reached.
Further, the multi-connected air conditioner device of the embodiment of the present invention also includes multiple first detector units and multiple second inspections
Unit is surveyed, wherein, multiple first detector units can be multiple temperature-sensitive bags（Hereinafter referred to as liquid pipe temperature-sensitive bag）, indoor set enters
One temperature-sensitive bag is set in liquid pipe, and what multiple liquid pipe temperature-sensitive bags were respectively intended to detect multiple stage indoor set enters liquid temp, multiple second
Detector unit equally can also be multiple temperature-sensitive bags（Hereinafter referred to as tracheae temperature-sensitive bag）, one is arranged in the escaping pipe of an indoor set
Temperature-sensitive bag, multiple tracheae temperature-sensitive bags are respectively intended to detect the air outlet temperature of multiple stage indoor set.Controller and multiple liquid pipe temperature-sensitive bags
It is connected with multiple tracheae temperature-sensitive Bao Jun, electronics on each indoor set is determined according to the refrigerant evaporation degree of superheat of each indoor set
The aperture regulation amount of expansion valve, i.e. electric expansion valve on 1# indoor sets is determined according to the refrigerant evaporation degree of superheat of 1# indoor sets
Aperture regulation amount, according to the refrigerant evaporation degree of superheat of 2# indoor sets determining the aperture regulation of electric expansion valve on 2# indoor sets
Amount, by that analogy, the aperture regulation of electric expansion valve on n# indoor sets is determined according to the refrigerant evaporation degree of superheat of n# indoor sets
Amount, wherein, the refrigerant evaporation degree of superheat of certain indoor set is the air outlet temperature and feed liquor temperature difference of this indoor set.
Preferably, the liquid pipe temperature-sensitive bag on each indoor set is separately positioned on the first position of each indoor set feed tube
On, this first position is the position between indoor set and the electric expansion valve of indoor set, i.e. the liquid pipe temperature-sensitive on n# indoor sets
Bag is arranged between the electric expansion valve of n# indoor sets and n# indoor sets, that is, the liquid pipe temperature-sensitive bag of n# indoor sets is with respect to n# rooms
For the electric expansion valve of interior machine, the former is closer to n# indoor sets.By the way that liquid pipe temperature temperature-sensitive bag is arranged on into electric expansion valve
Between indoor set, can more accurately get indoor set enters liquid temp.The tracheae temperature-sensitive bag difference of each indoor set
It is arranged on the gas gathering manifold of each indoor set, between the big valve interface of indoor set and the indoor machine evaporation.
In embodiments of the present invention, according to the refrigerant evaporation degree of superheat of each indoor set determining electronics on each indoor set
The aperture regulation amount of expansion can determine the aperture regulation amount of electric expansion valve according to below equation：
Wherein, EXVMeshFor the aperture regulation amount of electric expansion valve on target indoor set, △ TMeshFor the refrigerant of target indoor set
Evaporation super heat value, EXVNon- meshFor the aperture regulation amount of electric expansion valve on non-targeted indoor set, △ TNon- meshFor non-targeted indoor set
Refrigerant evaporation super heat value, EXVMesh=△TMesh-E1Represent that the aperture regulation amount for determining electric expansion valve on target indoor set is being counted
The numerical value of the difference of the refrigerant evaporation degree of superheat and the first parameter preset E1 of machine in target chamber, EXV are equal in valueNon- mesh=△TNon- mesh-E2Table
Show that the aperture regulation amount for determining electric expansion valve on non-targeted indoor set is numerically equal to the refrigerant evaporation of non-targeted indoor set
The numerical value of the difference of super heat value and the second parameter preset E2, E1, E2 are parameter preset, and E1<E2, in the embodiment of the present invention
In, E1 can be with value 1, and E2 values are 2≤E2≤4, i.e. the aperture regulation amount of control electric expansion valve is numerically equal to refrigerant
The difference of the evaporation degree of superheat and parameter preset.
Further, in embodiments of the present invention, controller can be at interval of 40 seconds（Can also be arranged as required to as it
Its time）Come liquid pipe temperature-sensitive bag is detected enter liquid temp, the air outlet temperature that tracheae temperature temperature-sensitive bag is detected is carried out once
Obtain, and correspondingly calculate once the refrigerant evaporation degree of superheat of each indoor set, and correspondingly determine one group of each interior
The aperture regulation amount of electric expansion valve, then carries out Primary regulation to each electric expansion valve on machine, as long as the aperture determined
Regulated quantity is not zero, you can electric expansion valve is adjusted.
Further, controller be additionally operable to control compressor running frequency at interval of Preset Time raise once, specifically
Ground, the multi-connected air conditioner device of the embodiment of the present invention also includes the 3rd detector unit, and the 3rd detector unit can be pressure sensing
Device, for detecting the pressure value at compressor air suction end, controller is connected with the 3rd detector unit, for according to compressor air suction
The pressure value at end controls the lift-off value of compressor operating frequency.In embodiments of the present invention, pressure sensor can preferably set
Put on the air intake duct of compressor, accurately to detect the low-pressure lateral pressure value of air-conditioner unit, then by the low pressure for detecting
Side pressure value is converted to the corresponding evaporating temperature of refrigerant under the pressure, and determines the liter of compressor operating frequency according to below equation
High level：
K=C（TIt is low-TLow mesh）,
Wherein, K for compressor operating frequency lift-off value, TIt is lowFor the corresponding temperature value of pressure value at compressor air suction end
（That is, the corresponding evaporating temperature of refrigerant under the pressure value for detecting）, TLow meshFor preset temperature value, C is parameter preset, K=C（TIt is low-
TLow mesh）Represent that the lift-off value for determining compressor operating frequency is numerically equal to TIt is lowWith TLow meshC times of numerical value of difference, in the present invention
In embodiment, preset temperature TLow meshValue can be -3 DEG C≤TLow mesh≤ 9 DEG C, the value of C is carried out according to the difference of air-conditioner set
Experiment determines, can be in embodiments of the present invention 1≤C≤5, and the running frequency for controlling compressor is raised according to Preset Time,
The minimum value of Preset Time can be 1min, and maximum occurrences can be 10min.
The running frequency of high compressor is risen by interval, the unit low pressure of multi-connected air conditioner device can be reduced, and then reduced
The evaporating temperature of unit, overall refrigerant circulation is lifted, and compensate for the refrigerant damage that non-targeted indoor set contributes to target indoor set
Lose, reach the refrigeration to indoor set and compensate.
The 1# indoor sets illustrated with Fig. 1 are as target indoor set（That is, VIP indoor sets）, 2# and 3# indoor sets are non-targeted
Indoor set to further illustrate the embodiment of the present invention in multi-connected air conditioner device, it is assumed that multi-connected air conditioner device run when, 1# and 3#
Indoor set refrigerating operaton, 2# indoor sets are shut down, then controller can control EXV1=△ T1-1, EXV3=△ T3-E2,（2≤E2≤
4）, wherein, △ T1 are the refrigerant evaporation degree of superheat of 1# indoor sets, and EXV1 is the aperture regulation of electric expansion valve P1 on 1# indoor sets
Amount, △ T3 are the refrigerant evaporation degree of superheat of 3# indoor sets, and EXV3 is the aperture regulation amount of electric expansion valve P3 on 3# indoor sets, this
Sample is different by control electronic expansion valve opening regulated quantity, and equivalent to non-VIP is improved indoor set is run（3# indoor sets）Refrigerant
The evaporation degree of superheat, aperture EXV3 of electric expansion valve is less than aperture EXV1 of electric expansion valve on 1# indoor set on 3# indoor sets,
Comparatively, the refrigerant circulation of 3# indoor sets is reduced, and the refrigerant of reduction all supplies the machine in 1# that gives, so that machine is cold in 1#
Matchmaker's amount is more than non-controlling situation, to improve the refrigeration of machine in 1#.If machine is also started shooting in 2#, equally can control in 2# rooms
Machine is consistent with the aperture regulation amount of the electric expansion valve of 3# indoor sets, i.e. the aperture of electric expansion valve P2 on control 2# indoor sets
Regulated quantity EXV2=(△ T2-E2).
It should be noted that in embodiments of the present invention, target indoor set can be selected by user before start, with
Realize the indoor set not good to determine refrigeration according to Consumer's Experience；Multi-connected air conditioner can also carried out by operating personnel
During the project installation of device, certain or certain several indoor sets are selected according to actual installation environment as target indoor set.
The embodiment of the present invention additionally provides a kind of control method of multi-connected air conditioner device, and the control method is used to control this
The multi-connected air conditioner device that bright embodiment the above is provided, specifically, the multi-connected air conditioner device that the embodiment of the present invention is provided
Control method it is mainly described non-to control by adjusting the aperture of electric expansion valve on target indoor set and non-targeted indoor set
The refrigerant evaporation degree of superheat of target indoor set is more than the refrigerant evaporation degree of superheat of the target indoor set, wherein, the multiple
The multiple stage indoor set of air-conditioner by the target indoor set and the non-targeted indoor units into.
Aperture and non-mesh that the embodiment of the present invention passes through electric expansion valve on target indoor set in regulation multi-connected air conditioner device
Mark the refrigerant evaporation degree of superheat of the aperture of electric expansion valve on indoor set to control non-targeted indoor set and be more than target indoor set
The refrigerant evaporation degree of superheat, realizes and can come in control targe room using the poor indoor set of refrigeration as target indoor set
The refrigerant that machine gets is more than the refrigerant that non-targeted indoor set is obtained, to ensure the refrigeration of target indoor set.Solve existing
With the presence of the problem that multi-connected air conditioner device part indoor set refrigeration in technology is poor, and then raising multi-connected air conditioner is reached
The integrally cooling effect of device.
Preferably, the control method of the embodiment of the present invention also includes：On target indoor set and non-targeted indoor set is adjusted
While the aperture of electric expansion valve, the running frequency of compressor in multi-connected air conditioner device is controlled, specifically, control pressure
The running frequency of contracting machine is raised once at interval of Preset Time, wherein, predeterminated frequency is that compressor is most in multi-connected air conditioner device
Big running frequency.
The running frequency of high compressor is risen by interval, the unit low pressure of multi-connected air conditioner device can be reduced, and then reduced
The evaporating temperature of unit, overall refrigerant circulation is lifted, and compensate for the refrigerant damage that non-targeted indoor set contributes to target indoor set
Lose, reach the refrigeration to indoor set and compensate.
Fig. 2 is the particular flow sheet of the control method according to above preferred embodiment of the present invention, as shown in Fig. 2 to pressure
The aperture of electric expansion valve is entered in the aperture and non-targeted indoor set of electric expansion valve on the running frequency of contracting machine, target indoor set
When row is adjusted, specifically, first obtaining to the on-off state of target indoor set, i.e. step S201, and target is being got
When indoor set is started shooting, the start moment of target indoor set is recorded（Hereinafter referred to as the first moment）, then start control from the first moment
The running frequency of compressor processed is raised once at interval of Preset Time, i.e. step S202, meanwhile, start to adjust from the first moment
The aperture of target indoor set and non-targeted indoor set upper electric expansion valve, i.e. step S203.
Obtained by the on-off state to target indoor set, realized in target indoor set once input fortune
OK, the aperture that electric expansion valve is just adjusted simultaneously and the running frequency for improving compressor, with time to the refrigeration of indoor set
Quickly compensated, reached the effect for improving compensation efficiency.
Specifically, electronic expansion on certain target indoor set can be in the following manner determined in embodiments of the present invention
Aperture regulation amount：
That detects this target indoor set enters liquid temp and air outlet temperature, specifically, can be by being arranged on this target
Liquid pipe temperature-sensitive bag on indoor set feed tube detecting into liquid temp, by the gas being arranged in this target indoor set escaping pipe
Pipe temperature-sensitive bag is detecting air outlet temperature；
The air outlet temperature and feed liquor temperature difference of target indoor set are calculated, the refrigerant evaporation mistake of this target indoor set is obtained
Temperature；
Determine that the refrigerant evaporation super heat value of target indoor set and the difference of the first parameter preset are electronics on target indoor set
The aperture regulation amount of expansion valve, i.e. determine electric expansion valve aperture regulation amount be numerically equal to the refrigerant evaporation degree of superheat with
The difference of the first parameter preset.
The aperture regulation amount of electronic expansion on non-targeted indoor set is determined in the following manner：
That detects non-targeted indoor set enters liquid temp and air outlet temperature, it is also possible to by being arranged on this non-targeted room
Liquid pipe temperature-sensitive bag on interior machine feed tube detecting into liquid temp, by the gas being arranged in this non-targeted indoor set escaping pipe
Pipe temperature-sensitive bag is detecting air outlet temperature；
The air outlet temperature and feed liquor temperature difference of non-targeted indoor set are calculated, the refrigerant evaporation mistake of non-targeted indoor set is obtained
Temperature；
Determine that the refrigerant evaporation super heat value of non-targeted indoor set and the difference of the second parameter preset are on non-targeted indoor set
The aperture regulation amount of electric expansion valve, i.e. determining the aperture regulation amount of electric expansion valve, to be numerically equal to refrigerant evaporation overheated
The difference of degree and the second parameter preset, wherein, the first parameter preset is less than the second parameter preset.
In the control method of the embodiment of the present invention, can be at interval of 40 seconds（Can also be arranged as required to for other when
Between）Come liquid pipe temperature-sensitive bag is detected enter liquid temp, the air outlet temperature that tracheae temperature temperature-sensitive bag is detected once is obtained,
And the refrigerant evaporation degree of superheat of each indoor set is correspondingly calculated once, and correspondingly determine electricity on one group of each indoor set
The aperture regulation amount of sub- expansion valve, then carries out Primary regulation to each electric expansion valve, as long as the aperture regulation amount determined
It is not zero, you can electric expansion valve is adjusted.
The lift-off value of compressor operating frequency is determined in the following manner：
The pressure value at detection compressor air suction end, specifically, can be by being arranged on the pressure sensing at compressor air suction end
Device is detecting the pressure value at compressor air suction end；
The corresponding temperature value of pressure value at compressor air suction end is searched, wherein, be stored with compression in multi-connected air conditioner device
The corresponding temperature value of different pressures value of machine suction end, i.e. the pressure value for detecting is converted to into refrigerant under the pressure corresponding
Evaporating temperature；
The preset multiple of the difference of temperature value and preset temperature is the lift-off value of compressor operating frequency.
As can be seen from the above description, present invention achieves avoiding mechanism cold in the locellus of multi-connected air conditioner device middle part
The drawbacks of effect on driving birds is not good, the integrally cooling effect that multi-connected air conditioner device unit is provided is reached.
It should be noted that can be in such as one group computer executable instructions the step of the flow process of accompanying drawing is illustrated
Perform in computer system, and, although show logical order in flow charts, but in some cases, can be with not
The order being same as herein performs shown or described step.
Obviously, those skilled in the art should be understood that above-mentioned each module of the invention or each step can be with general
Computing device realizing, they can be concentrated on single computing device, or are distributed in multiple computing devices and are constituted
Network on, alternatively, they can be realized with the executable program code of computing device, it is thus possible to they are stored
Performed by computing device in the storage device, or they be fabricated to respectively each integrated circuit modules, or by they
In multiple modules or step be fabricated to single integrated circuit module to realize.So, the present invention is not restricted to any specific
Hardware and software is combined.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (9)
1. a kind of multi-connected air conditioner device, it is characterised in that include：
Compressor；
Multiple stage indoor set, the multiple stage indoor set by target indoor set and non-targeted indoor units into；
Multiple electric expansion valves, are separately positioned on the feed tube of the multiple stage indoor set；And
Controller, for the aperture by adjusting the plurality of electric expansion valve, the refrigerant for controlling the non-targeted indoor set steams
The refrigerant evaporation degree of superheat of the degree of superheat more than the target indoor set is sent out,
Wherein, if the target indoor set is multiple stage, then the refrigerant evaporation degree of superheat of each target indoor set is controlled
The refrigerant evaporation degree of superheat of respectively less than described non-targeted indoor set, for the non-targeted indoor set be multiple stage in the case of, then control
The refrigerant evaporation degree of superheat for making each target indoor set is respectively less than the refrigerant evaporation mistake of any one non-targeted indoor set
Temperature,
Wherein, the controller is additionally operable to control the running frequency of the compressor and raises once at interval of Preset Time, described
Multi-connected air conditioner device also includes：3rd detector unit, is arranged on the air intake duct of the compressor, for detecting the compressor
The pressure value of suction end, wherein, the controller is connected with the 3rd detector unit, for according to the compressor air suction
The pressure value at end controls the lift-off value of the compressor operating frequency,
Wherein, the aperture of electric expansion valve on target indoor set described in the multi-connected air conditioner device is adjusted by the controller
The refrigerant evaporation that the non-targeted indoor set is controlled with the aperture of electric expansion valve on the non-targeted indoor set is overheated
The refrigerant evaporation degree of superheat of the degree more than the target indoor set.
2. multi-connected air conditioner device according to claim 1, it is characterised in that the multi-connected air conditioner device also includes：
Multiple first detector units, be respectively used to detect the multiple stage indoor set enters liquid temp；And
Multiple second detector units, are respectively used to detect the air outlet temperature of the multiple stage indoor set,
Wherein, the controller is connected with the plurality of first detector unit and the plurality of second detector unit, is used for
The aperture of electric expansion valve on first indoor set is adjusted according to the refrigerant evaporation degree of superheat of the first indoor set, wherein, it is described
First indoor set is arbitrary indoor set in the multiple stage indoor set, and the refrigerant evaporation degree of superheat of first indoor set is institute
State the air outlet temperature and feed liquor temperature difference of the first indoor set.
3. multi-connected air conditioner device according to claim 2, it is characterised in that the plurality of first detector unit is respectively provided with
On the first position of the multiple stage indoor set feed tube, wherein, the first position on the first indoor set feed tube is located at
Between first indoor set and the first electronic expansion, first electric expansion valve is that the electronics on first indoor set is swollen
Swollen valve.
4. multi-connected air conditioner device according to claim 2, it is characterised in that the controller determines institute according to below equation
State the aperture regulation amount of electric expansion valve on electric expansion valve and the non-targeted indoor set on target indoor set：
Wherein, EXVMeshFor the aperture regulation amount of electric expansion valve on the target indoor set, △ TMeshFor the target indoor set
Refrigerant evaporation super heat value, EXVNon- meshFor the aperture regulation amount of electric expansion valve on the non-targeted indoor set, △ TNon- meshFor described
The refrigerant evaporation super heat value of non-targeted indoor set, E1, E2 are parameter preset, and E1<E2.
5. multi-connected air conditioner device according to claim 4, it is characterised in that the controller determines institute according to below equation
State the lift-off value of compressor operating frequency：
K=C (TIt is low-TLow mesh),
Wherein, K is the lift-off value of the compressor operating frequency, TIt is lowFor the corresponding temperature of pressure value at the compressor air suction end
Value, TLow meshFor preset temperature value, C is parameter preset.
6. a kind of control method of multi-connected air conditioner device, the multiple stage indoor set of the multi-connected air conditioner device is by target indoor set and non-
Target indoor units are into, it is characterised in that the control method by adjusting in the target indoor set and the non-targeted room
The aperture of electric expansion valve on machine, controls the refrigerant evaporation degree of superheat of the non-targeted indoor set more than the target indoor set
The refrigerant evaporation degree of superheat, wherein, if the target indoor set is multiple stage, then control the refrigerant of each target indoor set
The evaporation degree of superheat is respectively less than the refrigerant evaporation degree of superheat of the non-targeted indoor set, for the non-targeted indoor set is multiple stage
Situation, the then refrigerant evaporation degree of superheat for controlling each target indoor set is respectively less than the cold of any one non-targeted indoor set
Matchmaker evaporates the degree of superheat, wherein, the aperture of electric expansion valve on the target indoor set and the non-targeted indoor set is adjusted
Meanwhile, the running frequency for controlling compressor in the multi-connected air conditioner device is raised once at interval of Preset Time.
7. control method according to claim 6, it is characterised in that adjusting the target indoor set and the non-targeted
On indoor set while electronic expansion valve opening, the running frequency of compressor in the multi-connected air conditioner device is controlled at interval of default
Time rising once includes：
Obtain the on-off state of the target indoor set；
The running frequency for starting to control the compressor from the first moment is raised once at interval of the Preset Time, wherein, institute
It is the moment for getting target indoor set start to state for the first moment；And
Start the aperture for adjusting electric expansion valve on the target indoor set and the non-targeted indoor set from first moment.
8. the control method according to any one of claim 6 to 7, it is characterised in that
The aperture regulation amount of electronic expansion on the target indoor set is determined in the following manner：
That detects the target indoor set enters liquid temp and air outlet temperature；
The air outlet temperature and feed liquor temperature difference of the target indoor set are calculated, the refrigerant evaporation mistake of the target indoor set is obtained
Temperature；And
The numerical value for determining the refrigerant evaporation super heat value of the target indoor set and the difference of the first parameter preset is the target chamber
The aperture regulation amount of electric expansion valve on interior machine,
The aperture regulation amount of electronic expansion on the non-targeted indoor set is determined in the following manner：
That detects the non-targeted indoor set enters liquid temp and air outlet temperature；
The air outlet temperature and feed liquor temperature difference of the non-targeted indoor set are calculated, the refrigerant for obtaining the non-targeted indoor set steams
Send out the degree of superheat；And
The numerical value for determining the refrigerant evaporation super heat value of the non-targeted indoor set and the difference of the second parameter preset is the non-mesh
The aperture regulation amount of electric expansion valve on mark indoor set, wherein, first parameter preset is less than second parameter preset.
9. the control method according to claim 6 or 7, it is characterised in that determine the compressor fortune in the following manner
The lift-off value of line frequency：
Detect the pressure value at the compressor air suction end；
The corresponding temperature value of pressure value at the compressor air suction end is searched, wherein, it is stored with the multi-connected air conditioner device
The corresponding temperature value of different pressures value at the compressor air suction end；And
The preset multiple for determining the difference of the temperature value and preset temperature value is the lift-off value of the compressor operating frequency.
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| CN104539041B (en) * | 2014-12-09 | 2017-01-18 | 广东美的暖通设备有限公司 | VRF air conditioner system, back-up source device of indoor unit of VRF air conditioner system and control method |
| CN105571086B (en) * | 2016-03-04 | 2018-06-05 | 广东美的制冷设备有限公司 | Control method, control device and the multi-split air conditioner of multi-split air conditioner |
| CN106123117A (en) * | 2016-06-29 | 2016-11-16 | 青岛海尔空调电子有限公司 | A kind of air conditioning unit and control method of multi-connected machine |
| CN107144054B (en) * | 2017-04-14 | 2019-04-16 | 珠海格力电器股份有限公司 | Opening degree control method and device of electronic expansion valve |
| DE102017214941A1 (en) | 2017-08-25 | 2019-02-28 | Dometic Sweden Ab | Recreational vehicle, cooling device, control system and method of controlling the cooling device |
| DE112018005002T5 (en) | 2017-10-27 | 2020-07-16 | Dometic Sweden Ab | SYSTEMS, METHODS AND DEVICES FOR PROVIDING COMMUNICATION BETWEEN AIR-CONDITIONING CONTROL DEVICES IN A MOTORHOME |
| CN110360729A (en) * | 2018-04-09 | 2019-10-22 | 珠海格力电器股份有限公司 | Unit high-fall pressure control method and device and air conditioning equipment |
| CN109114759B (en) | 2018-10-15 | 2020-05-22 | 广东美的制冷设备有限公司 | Control terminal, control method and device for multi-split air conditioner and storage medium |
| CN111520890A (en) * | 2020-03-27 | 2020-08-11 | 青岛海尔空调电子有限公司 | Multi-split air conditioner and sterilization control method thereof |
| CN112665254B (en) * | 2020-12-28 | 2022-03-15 | 江苏拓米洛环境试验设备有限公司 | Control method and device for multi-chamber electronic expansion valve of refrigeration system and refrigeration system |
| CN113531801B (en) * | 2021-07-27 | 2022-09-16 | 广东美的制冷设备有限公司 | Control method and device of multi-connected air conditioner and readable storage medium |
| CN113959054B (en) * | 2021-10-12 | 2022-12-13 | 珠海格力电器股份有限公司 | Control method for preventing overheating of multi-split evaporator and multi-split air conditioner |
| CN114992782B (en) * | 2022-04-20 | 2023-12-08 | 南京天加环境科技有限公司 | Intelligent control method for multi-split air conditioner |
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