CN106196495B - Control device and control method of multi-split air conditioner and multi-split air conditioner - Google Patents
Control device and control method of multi-split air conditioner and multi-split air conditioner Download PDFInfo
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- CN106196495B CN106196495B CN201610643538.3A CN201610643538A CN106196495B CN 106196495 B CN106196495 B CN 106196495B CN 201610643538 A CN201610643538 A CN 201610643538A CN 106196495 B CN106196495 B CN 106196495B
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- 238000000034 method Methods 0.000 title claims abstract description 47
- 238000004781 supercooling Methods 0.000 claims abstract description 68
- 238000001514 detection method Methods 0.000 claims abstract description 17
- 238000013021 overheating Methods 0.000 claims description 41
- 239000007788 liquid Substances 0.000 claims description 28
- 238000004378 air conditioning Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000005057 refrigeration Methods 0.000 claims description 9
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 36
- 230000007547 defect Effects 0.000 abstract description 6
- 230000004907 flux Effects 0.000 description 24
- 239000002826 coolant Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 6
- 238000005259 measurement Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000937378 Everettia interior Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/19—Pressures
- F25B2700/193—Pressures of the compressor
- F25B2700/1931—Discharge pressures
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control device and a control method of a multi-split air conditioner and the multi-split air conditioner, wherein the control device of the multi-split air conditioner comprises the following components: the detection unit is used for detecting the exhaust superheat degree of the air conditioner and the indoor superheat degree or the indoor supercooling degree; the judging unit is used for judging whether the exhaust superheat degree of the air conditioner is within a preset temperature range or not; and the adjusting unit adjusts the opening of the throttling device of the indoor unit of the air conditioner through the exhaust superheat degree, the indoor superheat degree or the indoor supercooling degree according to the judgment result of the judging unit. By adopting the method for detecting the exhaust superheat degree, the indoor superheat degree or the indoor supercooling degree to adjust the opening degree of the throttling device of the indoor unit, the defect that the accurate adjustment of the refrigerant flow between the indoor units is difficult to realize due to different capacities of the indoor units or large difference of refrigerant piping between the indoor units in the original control method can be overcome, and the accurate adjustment of the refrigerant flow between the indoor units is realized.
Description
Technical field
The invention belongs to air-conditioning technical fields, and in particular to a kind of control device of multi-gang air-conditioner, control method and more
Gang air-conditioner.
Background technique
The patent of Patent No. 201110269704.5 discloses a kind of control of refrigerant flow of multi-connected in the prior art
Method, but this control method is to subtract the interior machine heat exchanger average value being currently switched on by machine heat exchanger temperature value in calculating to adjust
Whole aperture, since coolant piping differs greatly between each interior machine capacity difference and interior machine, this control method is difficult to realize
The accurate adjusting of cold medium flux between interior machine.
Because there is the accurate adjusting for being difficult to realize cold medium flux between interior machine in multi-online air-conditioning system in the prior art
The technical issues of, therefore researching and designing of the present invention goes out control device, control method and the multi-gang air-conditioner of a kind of multi-gang air-conditioner.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming multi-online air-conditioning system in the prior art, there are interior machines
Between cold medium flux be difficult to the defect accurately adjusted, to provide a kind of control device of multi-gang air-conditioner, control method and more
Gang air-conditioner.
The present invention provides a kind of control device of multi-gang air-conditioner comprising:
Detection unit, for detecting the discharge superheat and indoor overheating degree or indoor degree of supercooling of air-conditioning；
Judging unit, for judging whether the discharge superheat of air-conditioning is within preset temperature range；
Unit is adjusted, according to the judging result of judging unit, passes through discharge superheat, indoor overheating degree and/or indoor mistake
It is cold to spend to adjust the aperture of air conditioner indoor unit throttling set.
Preferably,
When operation of air conditioner is when refrigeration mode, detection unit is for detecting discharge superheat A and indoor overheating degree B；
If discharge superheat A is not in the first preset temperature range, the aperture of indoor unit throttling set is by being vented at this time
Degree of superheat A and controlled；
If discharge superheat A is in the first preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Temperature B and controlled or comprehensively control carried out by discharge superheat A and indoor overheating degree B.
Preferably,
When discharge superheat A is not in the first preset temperature range,
And as A-a > C, adjust indoor unit throttling set aperture increase, as A-a <-C, aperture reduce, when-C≤
When A-a≤C, aperture is remained unchanged, and wherein a is first object discharge superheat, and C is the parameter greater than 0.
Preferably,
When discharge superheat A is in the first preset temperature range,
And as B-b > C, adjust indoor unit throttling set aperture increase, as B-b <-C, aperture reduce, when-C≤
When B-b≤C, aperture is remained unchanged, and wherein b is the degree of superheat in target chamber, and C is the parameter greater than 0.
Preferably,
When operation of air conditioner is when heating mode, detection unit is for detecting discharge superheat X and indoor degree of supercooling Y；
If discharge superheat X is not in the second preset temperature range, the aperture of indoor unit throttling set is by being vented at this time
Degree of superheat X and controlled；
If discharge superheat X is in the second preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Cold degree Y and controlled or comprehensively control carried out by discharge superheat X and interior degree of supercooling Y.
Preferably,
When discharge superheat X is not in the second preset temperature range,
And as X-x > C, adjust indoor unit throttling set aperture increase, as X-x <-C, aperture reduce, when-C≤
When X-x≤C, aperture is remained unchanged, and wherein x is the second target exhaust degree of superheat, and C is the parameter greater than 0.
Preferably,
When discharge superheat X is in the second preset temperature range,
And as Y-y > C, adjust indoor unit throttling set aperture increase, as Y-y <-C, aperture reduce, when-C≤
When Y-y≤C, aperture is remained unchanged, and wherein y is degree of supercooling in target chamber, and C is the parameter greater than 0.
Preferably,
The detection unit, including exhaust temperature sensing package and the high pressure sensor being set at exhaust outlet of compressor,
It further include in the evaporator tracheae temperature sensing package and liquid pipe being set on the tracheae being respectively connected with indoor heat exchanger
Evaporator liquid pipe temperature sensing package.
The present invention also provides a kind of control methods of multi-gang air-conditioner comprising:
Detecting step detects the discharge superheat and indoor overheating degree and/or indoor degree of supercooling of air-conditioning；
Judgment step, judges whether the discharge superheat of air-conditioning is within preset temperature range；
Regulating step passes through discharge superheat, indoor overheating degree or indoor degree of supercooling according to the judging result of judgment step
To adjust the aperture of indoor unit throttling set.
Preferably,
When operation of air conditioner is when refrigeration mode, detecting step detects discharge superheat A and indoor overheating degree B；
If discharge superheat A is not in the first preset temperature range, the aperture of indoor unit throttling set is by being vented at this time
Degree of superheat A and controlled；
If discharge superheat A is in the first preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Temperature B and controlled or comprehensively control carried out by discharge superheat A and indoor overheating degree B.
Preferably,
When discharge superheat A is not in the first preset temperature range,
And as A-a > C, adjust indoor unit throttling set aperture increase, as A-a <-C, aperture reduce, when-C≤
When A-a≤C, aperture is remained unchanged, and wherein a is first object discharge superheat, and C is the parameter greater than 0.
Preferably,
When discharge superheat A is in the first preset temperature range,
And as B-b > C, adjust indoor unit throttling set aperture increase, as B-b <-C, aperture reduce, when-C≤
When B-b≤C, aperture is remained unchanged, and wherein b is the degree of superheat in target chamber, and C is the parameter greater than 0.
Preferably,
When operation of air conditioner is when heating mode, detecting step detects discharge superheat X and indoor degree of supercooling Y；
If discharge superheat X is not in the second preset temperature range, the aperture of indoor unit throttling set is by being vented at this time
Degree of superheat X and controlled；
If discharge superheat X is in the second preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Cold degree Y and controlled or comprehensively control carried out by discharge superheat X and interior degree of supercooling Y.
Preferably,
When discharge superheat X is not in the second preset temperature range,
And as X-x > C, adjust indoor unit throttling set aperture increase, as X-x <-C, aperture reduce, when-C≤
When X-x≤C, aperture is remained unchanged, and wherein x is the second target exhaust degree of superheat, and C is the parameter greater than 0.
Preferably,
When discharge superheat X is in the second preset temperature range,
And as Y-y > C, adjust indoor unit throttling set aperture increase, as Y-y <-C, aperture reduce, when-C≤
When Y-y≤C, aperture is remained unchanged, and wherein y is degree of supercooling in target chamber, and C is the parameter greater than 0.
The present invention also provides a kind of multi-gang air-conditioners comprising the control device of multi-gang air-conditioner above-mentioned.
Control device, control method and the multi-gang air-conditioner of a kind of multi-gang air-conditioner provided by the invention have following beneficial
Effect:
1. the control device of multi-gang air-conditioner of the invention, control method and multi-gang air-conditioner are vented by using detection
The method that the degree of superheat, indoor overheating degree or indoor degree of supercooling are adjusted with the aperture to indoor unit throttling set, can overcome
Original control method due to each interior machine capacity is different or interior machine between coolant piping differ greatly and cause to be difficult to realize interior machine
Between cold medium flux the defect accurately adjusted, realize between machine cold medium flux accurate adjusting；
2. the control device of multi-gang air-conditioner of the invention, control method and multi-gang air-conditioner, additionally it is possible to solve because in
Machine capacity difference cause cold medium flux control failure and because between interior machine coolant piping differ greatly cause aperture control it is not in place
The technical issues of.
Detailed description of the invention
Fig. 1 is the system structure diagram of multi-gang air-conditioner of the invention.
Description of symbols:
1-compressor, 2-gas-liquid separators, 3-high pressure sensors, 4-low pressure sensors, 5-air-breathing temperature sensing packages, 6-
It is vented temperature sensing package, 7-four-way valves, 8-outdoor heat exchangers, 9-outer machine expansion valves, 10-indoor heat exchangers, 11-interior machine expansions
Valve, 12-evaporator tracheae temperature sensing packages, 13-evaporator liquid pipe temperature sensing packages, 14-big valves, 15-minor valves.
Specific embodiment
The present invention provides a kind of control device of multi-gang air-conditioner comprising:
Detection unit, for detecting the discharge superheat (difference of delivery temperature and high pressure saturation temperature) of air-conditioning, and
Indoor overheating degree (difference of evaporator tracheae temperature and liquid pipe temperature) or indoor degree of supercooling (high pressure saturation temperature and evaporator liquid
The difference of tube temperature degree)；
Judging unit, for judging whether the discharge superheat of air-conditioning is within preset temperature range；
Unit is adjusted, according to the judging result of judging unit, passes through discharge superheat, indoor overheating degree and/or indoor mistake
It is cold to spend to adjust the aperture of indoor unit throttling set.
After variable expansion valve aperture, discharge superheat, indoor overheating degree/degree of supercooling can all change.When refrigeration, with aperture
Increase, discharge superheat and indoor overheating degree reduce.When heating, as aperture increases, discharge superheat and indoor degree of supercooling drop
It is low.
The difference using interior machine heat exchanger temperature and its average value in respect to the background art come for adjusting aperture, this
Invention can be realized interior machine expansion valve and individually control, and be not in adjust an interior machine aperture other interior machines is caused to fluctuate together
Situation.
1. the control device of multi-gang air-conditioner of the invention, by using detection discharge superheat, indoor overheating degree or room
The method that interior degree of supercooling is adjusted with the aperture to indoor unit throttling set can overcome original control device due to each interior
Coolant piping differs greatly and causes to be difficult to realize the accurate adjusting of cold medium flux between interior machine between machine capacity difference or interior machine
Defect, to effectively realize the accurate adjusting of cold medium flux between interior machine；
2. the control device of multi-gang air-conditioner of the invention, additionally it is possible to solve because interior machine capacity difference leads to cold medium flux
Control failure and because between interior machine coolant piping differ greatly aperture caused to control technical problem not in place.
Preferably,
When operation of air conditioner is when refrigeration mode, detection unit is for detecting discharge superheat A and indoor overheating degree B；
If discharge superheat A is not at the first preset temperature range (preferably [5 DEG C, 20 DEG C], for by testing not equality of temperature
Machine is arranged in pairs or groups the empirical value that obtains in degree range and difference) in, at this time the aperture of indoor unit throttling set by discharge superheat A and into
Row control；If A within the said temperature range, does not illustrate that machine aperture distance objective state difference is larger at this time, discharge superheat
It is faster than indoor overheating degree to spend adjustment speed, therefore aperture is transferred in zone of reasonableness first with discharge superheat, then pass through interior
The degree of superheat realizes accurate adjust.
If discharge superheat A is in the first preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Temperature B and controlled or comprehensively control carried out by discharge superheat A and indoor overheating degree B.Discharge superheat adjustment speed
It is faster than indoor overheating degree, if A in temperature range, illustrates at this time that machine aperture in the reasonable scope, then passes through indoor mistake
Temperature adds discharge superheat comprehensive adjustment to can be realized accurate, small adjusting by indoor overheating degree.
This be control device of the invention operation of air conditioner under refrigeration mode according to selecting different tools under different situations
The control and regulation method of body, can be according to the value range of specific discharge superheat opening using the indoor unit for being best suited for air-conditioning
It spends and is adjusted.
Preferably,
When discharge superheat A is not in the first preset temperature range,
And when working as A-a > C (preferably 1 DEG C, similarly hereinafter), the aperture increase for adjusting indoor unit throttling set (preferably increases
8P), as A-a <-C, aperture reduces (preferably reduction 8P), and as-C≤A-a≤C, aperture is remained unchanged, and wherein a is the
The one target exhaust degree of superheat, C are the parameter greater than 0.
This is of the invention when discharge superheat A is not in the first preset temperature range, specific indoor unit section
The control and regulation method for flowing the aperture of device illustrates to survey discharge superheat than first object discharge superheat as A-a > C
It is morely big, excessive discharge temperature at this moment may be brought to influence the performance of compressor and air-conditioning, it is therefore desirable in increasing in time
The aperture of machine throttling set more refrigerants flow through indoor evaporator to be evaporated heat absorption, to reduce discharge superheat；When
When A-a <-C, illustrate that actual measurement discharge superheat is morely smaller than first object discharge superheat, it may be possible to due to indoor refrigerant
Flow is excessive to be caused, and at this moment may bring that the heat transfer effect of outer machine heat exchanger reduces, the power of compressor is not caught up with, therefore is needed
The aperture that reduce interior machine throttling set in time less refrigerant flow through indoor evaporator to be evaporated heat absorption, thus the row of being promoted
The gas degree of superheat；If when-C≤A-a≤C, illustrating that discharge superheat in the error range near target value, meets normal model
It encloses and demand, therefore maintains aperture constant at this time.
Preferably,
When discharge superheat A is in the first preset temperature range,
And as B-b > C, the aperture for adjusting indoor unit throttling set increases (preferably increase 8P), as B-b <-C, opens
Degree reduces (preferably reduction 8P), and as-C≤B-b≤C, aperture is remained unchanged, and wherein b is the degree of superheat in target chamber, and C is greater than 0
Parameter, preferably 1.
This is of the invention when discharge superheat A is in the first preset temperature range, specific indoor unit throttling
The control and regulation method of the aperture of device, as B-b > C, degree of superheat height, that is, evaporator outlet pipe temperature is higher than inlet pipe temperature, at this time
Refrigerant had been hot gaseous, and increasing cold medium flux can reduce the heat exchange efficiency of unit mass refrigerant, reduces indoor overheating degree；When
When B-b <-C, since the exchange capability of heat of evaporator is limited, the low degree of superheat is big, unit mass refrigerant because of cold medium flux
Heat exchange efficiency it is low, the refrigerant of gas-liquid two-phase can not be in evaporator evaporating completely, so evaporator outlet pipe temperature can be relatively low, solution
Certainly scheme is exactly to reduce cold medium flux；If when-C≤B-b≤C, illustrating error range of the indoor overheating degree near target value
It is interior, meet normal range and demand, therefore maintain aperture constant at this time.
Preferably,
When operation of air conditioner is when heating mode, detection unit is for detecting discharge superheat X and indoor degree of supercooling Y；
If discharge superheat X is not at the second preset temperature range, (preferably [10 DEG C, 30 DEG C] are different by test
Machine is arranged in pairs or groups the empirical value that obtains in temperature range and difference) in, at this time the aperture of indoor unit throttling set by discharge superheat X and
It is controlled；If X within the said temperature range, does not illustrate that machine aperture distance objective state difference is larger at this time, was vented
Temperature adjustment speed is faster than indoor degree of supercooling, therefore aperture is transferred in zone of reasonableness first with discharge superheat, then pass through room
Interior degree of supercooling realizes accurate adjust.
If discharge superheat X is in the second preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Cold degree Y and controlled or comprehensively control carried out by discharge superheat X and interior degree of supercooling Y.Discharge superheat adjustment speed
It is faster than indoor degree of supercooling, if X in temperature range, illustrates at this time that machine aperture in the reasonable scope, then passes through indoor mistake
Cold degree adds discharge superheat comprehensive adjustment to can be realized accurate, small adjusting by indoor degree of supercooling.
This be control device of the invention operation of air conditioner under heating mode according to selecting different tools under different situations
The control and regulation method of body, can be according to the value range of specific discharge superheat opening using the indoor unit for being best suited for air-conditioning
It spends and is adjusted.
Preferably,
When discharge superheat X is not in the second preset temperature range,
And as X-x > C, the aperture for adjusting indoor unit throttling set increases (preferably increase 8P), as X-x <-C, opens
Degree reduces (preferably reduction 8P), and as-C≤X-x≤C, aperture is remained unchanged, and wherein x is the second target exhaust degree of superheat, and C is
Parameter greater than 0.
This is of the invention when discharge superheat X is not in the second preset temperature range, specific indoor unit section
The control and regulation method for flowing the aperture of device illustrates to survey discharge superheat X than the second target exhaust degree of superheat as X-x > C
X is morely big, and excessive discharge temperature at this moment may be brought to influence the performance of compressor and air-conditioning, it is therefore desirable in increasing in time
The aperture of machine throttling set more refrigerants flow through indoor evaporator to be recycled, to reduce discharge superheat；Work as X-x
When <-C, illustrate that actual measurement discharge superheat is morely smaller than the second target exhaust degree of superheat, it may be possible to due to indoor refrigerant stream
Measure it is excessive cause, at this moment may bring that the heat transfer effect of outer machine heat exchanger reduces, the power of compressor is not caught up with, it is therefore desirable to
The aperture of machine throttling set less refrigerant flow through indoor condenser to be recycled in reducing in time, to promote discharge superheat
Degree；If when-C≤X-x≤C, illustrating that discharge superheat in the error range near target value, meets normal range and need
It asks, therefore maintains aperture constant at this time.
Preferably,
When discharge superheat X is in the second preset temperature range,
And as Y-y > C, the aperture for adjusting indoor unit throttling set increases (preferably increase 8P), as Y-y <-C, opens
Degree reduces (preferably reduction 8P), and as-C≤Y-y≤C, aperture is remained unchanged, and wherein y is degree of supercooling in target chamber, and C is greater than 0
Parameter.
This is of the invention when discharge superheat X is in the second preset temperature range, specific indoor unit throttling
The control and regulation method of the aperture of device, as Y-y > C, degree of supercooling height is that indoor outlet pipe temperature is low, and increasing refrigerant circulation can
Outlet pipe temperature is improved, it is morely bigger than degree of supercooling in target chamber to illustrate to survey indoor degree of supercooling at this time, at this moment may be because of cold
Matchmaker's internal circulating load is few and influences its normal performance, it is therefore desirable to which the aperture of machine throttling set flows through more refrigerants in increasing in time
Indoor heat exchanger carries out condensation heat release, to reduce indoor degree of supercooling；As Y-y <-C, the low i.e. indoor outlet pipe temperature of degree of supercooling
Height, reducing refrigerant circulation makes refrigerant side sufficiently exchanges heat and can reduce outlet pipe temperature indoors, illustrates to survey indoor degree of supercooling at this time
It is morely smaller than degree of supercooling in target chamber, it may be possible to cause since indoor cold medium flux is excessive, at this moment may bring entrance
Refrigerant in compressor the case where there are liquid, is to occur liquid hammer, it is therefore desirable to which the aperture of machine throttling set makes in reducing in time
Less refrigerant flows through indoor heat exchanger and is recycled, to promote indoor degree of supercooling；If when-C≤Y-y≤C, illustrating indoor mistake
Cold degree meets normal range and demand in the error range near target value, therefore maintains aperture constant at this time.
Preferably,
The detection unit is used for including the exhaust temperature sensing package 6 being set at exhaust outlet of compressor and high pressure sensor 3
Delivery temperature and exhaust high-pressure are detected, and described be vented is calculated by the difference of delivery temperature and high pressure saturation temperature
Temperature；
It further include the evaporator tracheae temperature sensing package 12 and liquid pipe being set on the tracheae being respectively connected with indoor heat exchanger 10
On evaporator liquid pipe temperature sensing package 13, for detecting the tracheae temperature and liquid pipe temperature of indoor heat exchanger, and pass through evaporator gas
The difference of tube temperature degree and evaporator liquid pipe temperature calculates the indoor overheating degree；
Liquid (is also passed through by the difference of high pressure saturation temperature (can obtain by high pressure sensor 3) and evaporator liquid pipe temperature
Pipe temperature sensing package 13 can obtain) calculate the indoor degree of supercooling.
The present invention also provides a kind of control methods of multi-gang air-conditioner comprising:
Detecting step detects the discharge superheat and indoor overheating degree and/or indoor degree of supercooling of air-conditioning；
Judgment step, judges whether the discharge superheat of air-conditioning is within preset temperature range；
Regulating step passes through discharge superheat, indoor overheating degree or indoor degree of supercooling according to the judging result of judgment step
To adjust the aperture of indoor unit throttling set.
1. the control method of multi-gang air-conditioner of the invention, by using detection discharge superheat, indoor overheating degree or room
The method that interior degree of supercooling is adjusted with the aperture to indoor unit throttling set can overcome original control method due to each interior
Coolant piping differs greatly and causes to be difficult to realize the accurate adjusting of cold medium flux between interior machine between machine capacity difference or interior machine
Defect, to effectively realize the accurate adjusting of cold medium flux between interior machine；
2. the control method of multi-gang air-conditioner of the invention, additionally it is possible to solve because interior machine capacity difference leads to cold medium flux
Control failure and because between interior machine coolant piping differ greatly aperture caused to control technical problem not in place.
Preferably,
When operation of air conditioner is when refrigeration mode, detecting step detects discharge superheat A and indoor overheating degree B；
If discharge superheat A is not in the first preset temperature range (preferably [5 DEG C, 20 DEG C]), at this time indoor unit section
The aperture of stream device is controlled by discharge superheat A；
If discharge superheat A is in the first preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Temperature B and controlled or comprehensively control carried out by discharge superheat A and indoor overheating degree B.
This be control method of the invention operation of air conditioner under refrigeration mode according to selecting different tools under different situations
The control and regulation method of body, can be according to the value range of specific discharge superheat opening using the indoor unit for being best suited for air-conditioning
It spends and is adjusted.
Preferably,
When discharge superheat A is not in the first preset temperature range,
And when working as A-a > C (preferably 1 DEG C, similarly hereinafter), the aperture increase for adjusting indoor unit throttling set (preferably increases
8P), as A-a <-C, aperture reduces (preferably reduction 8P), and as-C≤A-a≤C, aperture is remained unchanged, and wherein a is the
The one target exhaust degree of superheat, C are the parameter greater than 0.
This is of the invention when discharge superheat A is not in the first preset temperature range, specific indoor unit section
The control and regulation method for flowing the aperture of device illustrates to survey discharge superheat than first object discharge superheat as A-a > C
It is morely big, excessive discharge temperature at this moment may be brought to influence the performance of compressor and air-conditioning, it is therefore desirable in increasing in time
The aperture of machine throttling set more refrigerants flow through indoor evaporator to be evaporated heat absorption, to reduce discharge superheat；When
When A-a <-C, illustrate that actual measurement discharge superheat is morely smaller than first object discharge superheat, it may be possible to due to indoor refrigerant
Flow is excessive to be caused, and at this moment may bring that the heat transfer effect of outer machine heat exchanger reduces, the power of compressor is not caught up with, therefore is needed
The aperture that reduce interior machine throttling set in time less refrigerant flow through indoor evaporator to be evaporated heat absorption, thus the row of being promoted
The gas degree of superheat；If when-C≤A-a≤C, illustrating that discharge superheat in the error range near target value, meets normal model
It encloses and demand, therefore maintains aperture constant at this time.
Preferably,
When discharge superheat A is in the first preset temperature range,
And as B-b > C, the aperture for adjusting indoor unit throttling set increases (8P), and as B-b <-C, aperture reduces
(8P), as-C≤B-b≤C, aperture is remained unchanged, and wherein b is the degree of superheat in target chamber, and C is the parameter greater than 0.
This is of the invention when discharge superheat A is in the first preset temperature range, specific indoor unit throttling
The control and regulation method of the aperture of device, as B-b > C, degree of superheat height, that is, evaporator outlet pipe temperature is higher than inlet pipe temperature, at this time
Refrigerant had been hot gaseous, and increasing cold medium flux can reduce the heat exchange efficiency of unit mass refrigerant, reduces indoor overheating degree；When
When B-b <-C, the exchange capability of heat of evaporator is limited, the degree of superheat is low be because cold medium flux is big, the refrigerant of gas-liquid two-phase without
Method is in evaporator evaporating completely, so evaporator outlet pipe temperature can be relatively low, solution is exactly to reduce cold medium flux；If-C≤
When B-b≤C, illustrate indoor overheating degree in the error range near target value, meets normal range and demand, therefore this
When maintain aperture it is constant.
Preferably,
When operation of air conditioner is when heating mode, detecting step detects discharge superheat X and indoor degree of supercooling Y；
If discharge superheat X is not in the second preset temperature range (preferably [10 DEG C, 30 DEG C]), at this time indoor unit section
The aperture of stream device is controlled by discharge superheat X；
If discharge superheat X is in the second preset temperature range, the aperture of indoor unit throttling set is by indoor mistake at this time
Cold degree Y and controlled or comprehensively control carried out by discharge superheat X and interior degree of supercooling Y.
This be control device of the invention operation of air conditioner under heating mode according to selecting different tools under different situations
The control and regulation method of body, can be according to the value range of specific discharge superheat opening using the indoor unit for being best suited for air-conditioning
It spends and is adjusted.
Preferably,
When discharge superheat X is not in the second preset temperature range,
And as X-x > C, the aperture for adjusting indoor unit throttling set increases (preferably 8P), and as X-x <-C, aperture subtracts
Small (preferably 8P), as-C≤X-x≤C, aperture is remained unchanged, and wherein x is the second target exhaust degree of superheat, and C is the ginseng greater than 0
Number.
This is of the invention when discharge superheat X is not in the second preset temperature range, specific indoor unit section
The control and regulation method for flowing the aperture of device illustrates to survey discharge superheat X than the second target exhaust degree of superheat as X-x > C
X is morely big, and excessive discharge temperature at this moment may be brought to influence the performance of compressor and air-conditioning, it is therefore desirable in increasing in time
The aperture of machine throttling set more refrigerants flow through indoor evaporator to be recycled, to reduce discharge superheat；Work as X-x
When <-C, illustrate that actual measurement discharge superheat is morely smaller than the second target exhaust degree of superheat, it may be possible to due to indoor refrigerant stream
Measure it is excessive cause, at this moment may bring that the heat transfer effect of outer machine heat exchanger reduces, the power of compressor is not caught up with, it is therefore desirable to
The aperture of machine throttling set less refrigerant flow through indoor condenser to be recycled in reducing in time, to promote discharge superheat
Degree；If when-C≤X-x≤C, illustrating that discharge superheat in the error range near target value, meets normal range and need
It asks, therefore maintains aperture constant at this time.
Preferably,
When discharge superheat X is in the second preset temperature range,
And as Y-y > C, the aperture for adjusting indoor unit throttling set increases (preferably 8P), and as Y-y <-C, aperture subtracts
Small (preferably 8P), as-C≤Y-y≤C, aperture is remained unchanged, and wherein y is degree of supercooling in target chamber, and C is the parameter greater than 0.
This is of the invention when discharge superheat X is in the second preset temperature range, specific indoor unit throttling
The control and regulation method of the aperture of device, as Y-y > C, degree of supercooling height is that indoor outlet pipe temperature is low, and increasing refrigerant circulation can
Outlet pipe temperature is improved, it is morely bigger than degree of supercooling in target chamber to illustrate to survey indoor degree of supercooling at this time, at this moment may be because of cold
Matchmaker's internal circulating load is few and influences its normal performance and service life, it is therefore desirable to which the aperture of machine throttling set makes more cold in increasing in time
Matchmaker flows through outdoor heat exchanger and carries out condensation heat release, to reduce indoor degree of supercooling；As Y-y <-C, the low i.e. interior of degree of supercooling goes out
Tube temperature degree is high, and reducing refrigerant circulation makes refrigerant side sufficiently exchange heat and can reduce outlet pipe temperature indoors, illustrates actual measurement interior at this time
Degree of supercooling is morely smaller than degree of supercooling in target chamber, it may be possible to causes since indoor cold medium flux is excessive, it at this moment may band
The case where there are liquid entering the refrigerant in compressor is to occur liquid hammer, it is therefore desirable to machine throttling set in reducing in time
Aperture less refrigerant flow through indoor heat exchanger to be recycled, to promote indoor degree of supercooling；If when-C≤Y-y≤C, explanation
Indoor degree of supercooling meets normal range and demand in the error range near target value, therefore maintains aperture not at this time
Become.
The present invention also provides a kind of multi-gang air-conditioners comprising the control device of multi-gang air-conditioner above-mentioned.
1. multi-gang air-conditioner of the invention, by including control device above-mentioned, by using detection discharge superheat, room
The method that the interior degree of superheat or indoor degree of supercooling are adjusted with the aperture to indoor unit throttling set, can overcome original control
Device due to each interior machine capacity is different or interior machine between coolant piping differ greatly and lead to be difficult to realize refrigerant stream between interior machine
The defect of amount accurately adjusted, to effectively realize the accurate adjusting of cold medium flux between interior machine；
2. multi-gang air-conditioner of the invention, by including control device above-mentioned, additionally it is possible to solve because of interior machine capacity not
With cause cold medium flux control failure and because between interior machine coolant piping differ greatly and cause aperture to control technology not in place to ask
Topic.
The working principle of the invention and preferred embodiment is described below
Temperature sensing package is arranged in the present invention at exhaust outlet of compressor and interior machine inlet/outlet pipe, makes to be vented by machine aperture in adjusting
Temperature and the interior machine degree of superheat and interior machine degree of supercooling are in zone of reasonableness, realize the accurate adjusting of refrigerant.
The technical issues of solution:
1, it solves because interior machine capacity difference leads to cold medium flux control failure
2, solve because between interior machine coolant piping differ greatly cause aperture control it is not in place
The utility model has the advantages that
Outer machine discharge superheat and interior machine inlet pipe and outlet pipe temperature are controlled by machine aperture in adjusting, is realized between interior machine
The accurate adjusting of cold medium flux.
Air-conditioning system of the invention is by gas-liquid separator 2, compressor 1, high pressure sensor 3, low pressure sensor 4, air-breathing sense
Thermometer bulb 5, exhaust temperature sensing package 6, four-way valve 7, outdoor heat exchanger 8, outer machine expansion valve 9, indoor heat exchanger 10, interior machine expansion valve 11,
Evaporator tracheae temperature sensing package 12, liquid pipe temperature sensing package 13, big valve 14, minor valve 15 form.
The following are the implementation processes of invention.
One, refrigerating operaton.
After booting, interior machine is first pressed initial opening and is run 2 minutes.(delivery temperature and high pressure are full by outer machine testing discharge superheat A
With the difference of temperature), machine degree of superheat B (difference of evaporator tracheae temperature and liquid pipe temperature) in interior machine testing.It is set in program
Machine degree of superheat b in target exhaust degree of superheat a and target, different according to booting capacity and temperature, the value of a and b are also different, see below
Table.
1, as discharge superheat A less than 5 DEG C or it is 25 DEG C big when, interior machine aperture is controlled by discharge superheat.When 1 DEG C of A-a >
When, aperture increases (8P), and when < -1 DEG C of A-a, aperture reduces (8P), and when -1 DEG C≤A-a≤1 DEG C, aperture is remained unchanged.
2, when 5 DEG C≤A≤25 DEG C of discharge superheat, interior machine aperture is controlled by the interior machine degree of superheat.When 1 DEG C of B-b >, open
Degree increases (8P), and when < -1 DEG C of B-b, aperture reduces (8P), and when -1 DEG C≤B-b≤1 DEG C, aperture is remained unchanged.
Table 1
Wherein the value of a and b is not fixed.A11 ... b11 ... is that machine holds in operating condition and difference outside different chamber by a and b
The different values of amount.
Two, heating operation.
After booting, interior machine is first pressed initial opening and is run 3 minutes.(delivery temperature and high pressure are full by outer machine testing discharge superheat X
With the difference of temperature), (high pressure saturation temperature (passes through and a pressure is arranged at compressor exhaust pipe machine degree of supercooling Y in interior machine testing
Force snesor obtains high pressure saturation temperature to detect high pressure) with the difference of evaporator liquid pipe temperature).Target exhaust is set in program
Machine degree of supercooling y in degree of superheat x and target, different according to booting capacity and temperature, the value of a and b are also different, see the table below.
1, as discharge superheat A less than 10 DEG C or when being greater than 30 DEG C, interior machine aperture is controlled by discharge superheat.As X-x > 1
DEG C when, aperture increase (8P), when < -1 DEG C of X-x, aperture reduce (8P), when -1 DEG C≤X-x≤1 DEG C, aperture is remained unchanged.
2, when discharge superheat 10≤A≤30 DEG C, interior machine aperture is controlled by interior machine degree of supercooling.When 1 DEG C of Y-y >, open
Degree increases (8P), and when < -1 DEG C of Y-y, aperture reduces (8P), and when -1 DEG C≤Y-y≤1 DEG C, aperture is remained unchanged.
Table 2
Wherein the value of x and y is not fixed.X11 ... y11 ... is that machine holds in operating condition and difference outside different chamber by x and y
The different values of amount.
In the present invention, when unit refrigerating operaton, when 5 DEG C≤A≤25 DEG C of discharge superheat, interior machine aperture can be by being vented
Temperature and interior machine degree of superheat comprehensively control, in addition, discharge superheat value range can be modified.Similarly, when unit heating operation, when
10 DEG C≤A≤30 DEG C of discharge superheat, interior machine aperture can be by discharge superheat and interior machine degree of supercooling comprehensively control, discharge superheats
Degree value range can be modified.Other controls are the same as the present invention.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.With
It is only the preferred embodiment of the present invention described in upper, it is noted that for those skilled in the art, not
Under the premise of being detached from the technology of the present invention principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this
The protection scope of invention.
Claims (16)
1. a kind of control device of multi-gang air-conditioner, it is characterised in that: include:
Detection unit, for detecting the discharge superheat and indoor overheating degree or indoor degree of supercooling of air-conditioning；
Judging unit, for judging whether the discharge superheat of air-conditioning is within preset temperature range；
Unit is adjusted, according to the judging result of judging unit, passes through discharge superheat, indoor overheating degree and/or indoor degree of supercooling
To adjust the aperture of air conditioner indoor unit throttling set；
Wherein indoor overheating degree refers to that the difference of evaporator tracheae temperature Yu liquid pipe temperature, indoor degree of supercooling refer to that high pressure is full
With the difference of temperature and evaporator liquid pipe temperature.
2. control device according to claim 1, it is characterised in that:
When operation of air conditioner is when refrigeration mode, detection unit is for detecting discharge superheat A and indoor overheating degree B；
If discharge superheat A is not in the first preset temperature range, the aperture of indoor unit throttling set is by discharge superheat at this time
It spends A and is controlled；
If discharge superheat A is in the first preset temperature range, the aperture of indoor unit throttling set is by indoor overheating degree B at this time
And it is controlled or comprehensively control is carried out by discharge superheat A and indoor overheating degree B.
3. control device according to claim 2, it is characterised in that:
When discharge superheat A is not in the first preset temperature range,
And as A-a > C, the aperture for adjusting indoor unit throttling set increases, and as A-a <-C, aperture reduces, as-C≤A-a
When≤C, aperture is remained unchanged, and wherein a is first object discharge superheat, and C is the parameter greater than 0.
4. control device according to claim 2, it is characterised in that:
When discharge superheat A is in the first preset temperature range,
And as B-b > C, the aperture for adjusting indoor unit throttling set increases, and as B-b <-C, aperture reduces, as-C≤B-b
When≤C, aperture is remained unchanged, and wherein b is the degree of superheat in target chamber, and C is the parameter greater than 0.
5. control device according to claim 1, it is characterised in that:
When operation of air conditioner is when heating mode, detection unit is for detecting discharge superheat X and indoor degree of supercooling Y；
If discharge superheat X is not in the second preset temperature range, the aperture of indoor unit throttling set is by discharge superheat at this time
It spends X and is controlled；
If discharge superheat X is in the second preset temperature range, the aperture of indoor unit throttling set is by indoor degree of supercooling Y at this time
And it is controlled or comprehensively control is carried out by discharge superheat X and interior degree of supercooling Y.
6. control device according to claim 5, it is characterised in that:
When discharge superheat X is not in the second preset temperature range,
And as X-x > C, the aperture for adjusting indoor unit throttling set increases, and as X-x <-C, aperture reduces, as-C≤X-x
When≤C, aperture is remained unchanged, and wherein x is the second target exhaust degree of superheat, and C is the parameter greater than 0.
7. control device according to claim 5, it is characterised in that:
When discharge superheat X is in the second preset temperature range,
And as Y-y > C, the aperture for adjusting indoor unit throttling set increases, and as Y-y <-C, aperture reduces, as-C≤Y-y
When≤C, aperture is remained unchanged, and wherein y is degree of supercooling in target chamber, and C is the parameter greater than 0.
8. control device described in one of -7 according to claim 1, it is characterised in that:
The detection unit, including the exhaust temperature sensing package (6) being set at exhaust outlet of compressor and high pressure sensor (3)；
It further include the evaporator tracheae temperature sensing package (12) and liquid pipe being set on the tracheae being respectively connected with indoor heat exchanger (10)
On evaporator liquid pipe temperature sensing package (13).
9. a kind of control method of multi-gang air-conditioner, it is characterised in that: include:
Detecting step detects the discharge superheat and indoor overheating degree or indoor degree of supercooling of air-conditioning；
Judgment step, judges whether the discharge superheat of air-conditioning is within preset temperature range；
Regulating step passes through discharge superheat, indoor overheating degree and/or indoor degree of supercooling according to the judging result of judgment step
To adjust the aperture of indoor unit throttling set；
Wherein indoor overheating degree refers to that the difference of evaporator tracheae temperature Yu liquid pipe temperature, indoor degree of supercooling refer to that high pressure is full
With the difference of temperature and evaporator liquid pipe temperature.
10. control method according to claim 9, it is characterised in that:
When operation of air conditioner is when refrigeration mode, detecting step detects discharge superheat A and indoor overheating degree B；
If discharge superheat A is not in the first preset temperature range, the aperture of indoor unit throttling set is by discharge superheat at this time
It spends A and is controlled；
If discharge superheat A is in the first preset temperature range, the aperture of indoor unit throttling set is by indoor overheating degree B at this time
And it is controlled or comprehensively control is carried out by discharge superheat A and indoor overheating degree B.
11. control method according to claim 10, it is characterised in that:
When discharge superheat A is not in the first preset temperature range,
And as A-a > C, the aperture for adjusting indoor unit throttling set increases, and as A-a <-C, aperture reduces, as-C≤A-a
When≤C, aperture is remained unchanged, and wherein a is first object discharge superheat, and C is the parameter greater than 0.
12. control method according to claim 10, it is characterised in that:
When discharge superheat A is in the first preset temperature range,
And as B-b > C, the aperture for adjusting indoor unit throttling set increases, and as B-b <-C, aperture reduces, as-C≤B-b
When≤C, aperture is remained unchanged, and wherein b is the degree of superheat in target chamber, and C is the parameter greater than 0.
13. control method according to claim 9, it is characterised in that:
When operation of air conditioner is when heating mode, detecting step detects discharge superheat X and indoor degree of supercooling Y；
If discharge superheat X is not in the second preset temperature range, the aperture of indoor unit throttling set is by discharge superheat at this time
It spends X and is controlled；
If discharge superheat X is in the second preset temperature range, the aperture of indoor unit throttling set is by indoor degree of supercooling Y at this time
And it is controlled or comprehensively control is carried out by discharge superheat X and interior degree of supercooling Y.
14. control method according to claim 13, it is characterised in that:
When discharge superheat X is not in the second preset temperature range,
And as X-x > C, the aperture for adjusting indoor unit throttling set increases, and as X-x <-C, aperture reduces, as-C≤X-x
When≤C, aperture is remained unchanged, and wherein x is the second target exhaust degree of superheat, and C is the parameter greater than 0.
15. control method according to claim 13, it is characterised in that:
When discharge superheat X is in the second preset temperature range,
And as Y-y > C, the aperture for adjusting indoor unit throttling set increases, and as Y-y <-C, aperture reduces, as-C≤Y-y
When≤C, aperture is remained unchanged, and wherein y is degree of supercooling in target chamber, and C is the parameter greater than 0.
16. a kind of multi-gang air-conditioner, it is characterised in that: the control dress including multi-gang air-conditioner described in one of claim 1-8
It sets.
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| CN106765931B (en) * | 2016-12-14 | 2019-07-12 | 四川长虹空调有限公司 | The control method of multi-gang air-conditioner |
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| CN112665009A (en) * | 2020-12-21 | 2021-04-16 | 广东美的暖通设备有限公司 | Air conditioner indoor unit and control method and device thereof |
| CN112682988B (en) * | 2020-12-28 | 2022-05-17 | 江苏拓米洛环境试验设备有限公司 | Control method and device for refrigerant flow and refrigeration equipment |
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