CN110186145A - A kind of modified control method of the high drop of multi-connected machine, device and air conditioner - Google Patents
A kind of modified control method of the high drop of multi-connected machine, device and air conditioner Download PDFInfo
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- CN110186145A CN110186145A CN201910514924.6A CN201910514924A CN110186145A CN 110186145 A CN110186145 A CN 110186145A CN 201910514924 A CN201910514924 A CN 201910514924A CN 110186145 A CN110186145 A CN 110186145A
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- 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
- F24F11/32—Responding to malfunctions or emergencies
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- 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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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
- F24F11/88—Electrical aspects, e.g. circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of modified control method of the high drop of multi-connected machine, device and air conditioners, are related to air conditioner technical field, the current working status including judging each indoor unit；To normal heating state and compressor has been turned on the indoor unit of operation first time, detects its inlet temperature, middle part coil temperature and electronic expansion valve opening；The inlet temperature of each indoor unit is compared, highest inlet temperature and minimum inlet temperature are found；Judge the relationship between the difference of highest inlet temperature and minimum inlet temperature and presetting target difference；If inlet temperature difference is greater than target difference, electronic expansion valve opening is adjusted according to the relationship of inlet temperature difference and target difference.The present invention can effectively correct refrigerant bias current problem caused by high drop, guarantee the heating effect homogenization of multi-line system.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of modified control method of the high drop of multi-connected machine, dress
It sets and air conditioner.
Background technique
With the development of economic and technical level, present skyscraper is much provided with air-conditioning system and carries out to room temperature
Temperature is adjusted.Compared with traditional central air-conditioning, multi-gang air-conditioner has the significant advantage that, with brand new ideas, collection one drags more
Technology, intelligent control technology and power-saving technology are.It avoids conventional central air-conditioning one and opens and all open, and energy consumption is biggish asks
The operation of indoor unit can be both activated individually in topic, can also more indoor units run simultaneously so that controlling more flexible and energy saving.
Multi-gang air-conditioner can also be achieved Super long tube, the installation of high drop, so that the installation of multi-gang air-conditioner is more flexible and convenient.
Existing multi-online air-conditioning system at most can in parallel 4 outer machines, 64 indoor units, when indoor unit is mounted on for example
When high-storey hotel, the floor for the interior machine installation necessarily having is low, some story heights.Since refrigerant is by gravity in same set of system
Effect, the lower indoor machine refrigerant of installation floor will be more on the high side, and the higher indoor machine refrigerant of installation floor will be on the low side
A bit, this will lead to installation floor it is low indoor unit heating effect it is preferable, the indoor unit heating effect for installing story height is relatively poor.
Social since skyscraper is in the majority now, the requirement to the high drop of multi-joint indoor unit is also higher and higher, to expire simultaneously
The normal heating needs of each floor user of foot.But refrigerant Biased flow phenomenon caused by high drop is installed not can guarantee each indoor unit
Heating effect is more consistent.Existing control mode limits the use environment of modular multi-connection, becomes multi-gang air-conditioner system
One of the bottleneck of system future development.
Summary of the invention
In view of this, the present invention is intended to provide a kind of modified control method of the high drop of multi-connected machine, by each indoor unit
The aperture of electric expansion valve is adjusted, so that adjusting refrigerant flow rate is eliminated multi-connected machine height and fallen in each indoor unit reasonable distribution
Refrigerant Biased flow phenomenon, guarantees the homogenization of the heating effect of each indoor unit caused by difference is installed.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of high drop control method for correcting of multi-connected machine, comprising the following steps:
Judge the current working status of each indoor unit；
To normal heating state and compressor has been turned on the indoor unit of operation first time, detects its inlet temperature, middle part
Coil temperature and electronic expansion valve opening；
The inlet temperature for each indoor unit that will test compares, and finds highest inlet temperature and minimum inlet temperature；
Judge the relationship between the difference of highest inlet temperature and minimum inlet temperature and presetting target difference；
If inlet temperature difference is greater than target difference, electricity is adjusted according to the relationship of inlet temperature difference and target difference
Sub- expansion valve opening.
The present invention carries out its electronic expansion valve opening by finding the highest and lowest indoor unit of inlet temperature in system
It is corresponding to adjust, to control refrigerant flow reasonable distribution between indoor machine.It solves cold caused by the high drop installation of indoor unit
Matchmaker's bias current problem improves indoor unit and heats unbalanced situation, improves system heating efficiency and user satisfaction.
Further, if the inlet temperature difference is greater than the target difference, according to the inlet temperature
It includes: when the inlet temperature difference is greater than described that the relationship of difference and the target difference, which adjusts the electronic expansion valve opening,
When target difference, then judge respectively the degree of supercooling of indoor unit corresponding to the highest inlet temperature and the minimum inlet temperature with
Relationship between presetting target degree of supercooling, and according to the difference tune of the degree of supercooling of the indoor unit and the target degree of supercooling
It saves the highest inlet temperature and the minimum inlet temperature corresponds to the electronic expansion valve opening of indoor unit.
Present invention introduces multiple Rule of judgment to judge refrigerant deviation, and more accurate adjusting refrigerant flow rate is repaired
Just.
Further, the degree of supercooling of the indoor unit is the middle part coil temperature detected and the outlet temperature
Difference.
Present invention introduces degree of supercoolings as the second reference conditions, can the more accurate refrigerant for reasonably judging each indoor unit it is inclined
Process degree.
Further, if the inlet temperature difference is greater than the target difference, according to the inlet temperature
If it includes: the highest inlet temperature and described that the relationship of difference and the target difference, which adjusts the electronic expansion valve opening,
The absolute value of the difference of the degree of supercooling of indoor unit corresponding to minimum inlet temperature and the target degree of supercooling is greater than predetermined threshold, then
The electronic expansion valve opening of the corresponding indoor unit of the highest inlet temperature is reduced, the minimum inlet temperature is corresponding
Indoor unit the electronic expansion valve opening increase.
The present invention is adjusted the aperture of electric expansion valve according to the difference of indoor unit degree of supercooling and target degree of supercooling,
It effectively has adjusted refrigerant in system and solves the high drop installation of indoor unit at most with the flow distribution of refrigerant of least indoor unit
Lower refrigerant refrigerant bias current problem caused by by gravity.
Further, if the inlet temperature difference is greater than the target difference, according to the inlet temperature
The relationship of difference and the target difference adjusts the electronic expansion valve opening: according to the highest inlet temperature
With the difference of the absolute value of the difference of the degree of supercooling and target degree of supercooling of indoor unit corresponding to the minimum inlet temperature, institute
State the different degrees of reduction of the electronic expansion valve opening of the corresponding indoor unit of highest inlet temperature, the minimum inlet temperature
The different degrees of increasing of the electronic expansion valve opening of corresponding indoor unit.
The present invention is more serious in view of the more big then refrigerant bias current degree of indoor unit degree of supercooling, the corresponding electric expansion valve
Aperture regulation step number is bigger, and different sections are taken with the adjusting of different step numbers, and what be can be faster and more effective is modified.
Further, the correction conditions that exit are that the inlet temperature difference is less than or equal to the target difference or institute
The difference for stating the degree of supercooling and the target degree of supercooling of indoor unit corresponding to highest inlet temperature and the minimum inlet temperature is equal
Less than or equal to predetermined threshold.
The present invention is arranged two and exits correction conditions, and meeting one, to be considered as each indoor unit heating deviation in system enough
It is small, it can exit, avoid over-correction, scientific and reasonable and effective energy conservation.
Further, further includes: if it is determined that the system is shutdown or reaches warm shutdown status at this time, then exit amendment.
Further, further includes: detected every the second time and determine once, to adjust the electronic expansion valve opening repeatedly
Correction conditions are exited until meeting.
Just detection judgement is primary at regular intervals by the present invention, adjusts electric expansion valve repeatedly and is modified, and ensure that pair
The accuracy and reliability that cold medium flux is adjusted in system.
Another object of the present invention is to provide a kind of modified control devices of the high drop of multi-connected machine, to solve multi-connected machine system
The high drop of internal cause of uniting installs caused refrigerant bias current problem, the heating effect homogenization of each indoor unit in guarantee system.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of modified control device of high drop of multi-connected machine, including detection module and control module, wherein detection module
It is communicated to connect with control module:
Detection module is used to judge the current working status of each indoor unit in entire multi-line system, to normal heating state
And compressor has been turned on the indoor unit of operation first time, detects its outlet temperature, inlet temperature, middle part coil temperature and electricity
The inlet temperature of sub- expansion valve opening, each indoor unit that will test compares, and finds highest inlet temperature and minimum import
Temperature judges the relationship between the difference of highest inlet temperature and minimum inlet temperature and presetting target difference；
Control module is used to adjust electronic expansion valve opening according to the relationship of inlet temperature difference and target difference.
The present invention is compared using the difference for heating the highest and lowest temperature of import in system with presetting target difference
Compared with, while being compared by the practical degree of supercooling of respective chambers machine with target degree of supercooling, according to result by indoor unit heat into
Mouthful highest electric expansion valve of temperature turns down, by the minimum electronic expansion valve of indoor unit of indoor unit heating inlet temperature open greatly, from
And adjusting refrigerant flow rate reasonable distribution, solve the problems, such as that high drop causes heating effect unbalanced between indoor unit.
The third object of the present invention is to provide a kind of air conditioner, judges refrigerant bias current journey according to inlet temperature and degree of supercooling
Degree, and electronic expansion valve opening is adjusted to control refrigerant flow, overcome interior mechanism caused by high drop in multi-line system
The larger situation of thermal effect deviation.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of air conditioner, including the modified control device of the high drop of above-mentioned multi-connected machine.
The air conditioner is possessed beneficial compared with the existing technology with the modified control device of the high drop of above-mentioned multi-connected machine
Effect is identical, and details are not described herein.
Detailed description of the invention
Fig. 1 show the schematic illustration of the modified control method of the high drop of multi-connected machine of the embodiment of the present invention；
Fig. 2 show the flow chart of the modified control method of the high drop of multi-connected machine of the embodiment of the present invention；
Fig. 3 show the schematic diagram of electric expansion valve EXV aperture regulation of the embodiment of the present invention；
Fig. 4 show the flow diagram of the modified control method of the high drop of multi-connected machine of the embodiment of the present invention；
Fig. 5 show the schematic diagram of the modified control device of the high drop of multi-connected machine of the embodiment of the present invention.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Fig. 1 show the schematic illustration of the modified control method of the high drop of multi-connected machine of the embodiment of the present invention, respectively each
Temperature sensor is set at the outlet of indoor unit, import and middle part coil pipe, to detect the outlet temperature of each heating indoor unit respectively
Spend T1, inlet temperature T2 and middle part coil temperature Tm.In embodiments of the present invention, it detects each temperature sensor and finds out and heated
Run the highest inlet temperature T2 of multiple indoor units of a period of timemaxWith minimum inlet temperature T2min, by its difference TSH and one
Preset target difference TSHs is compared, and electronic expansion valve of indoor unit aperture is adjusted according to comparison result.Further
, also compare the degree of supercooling TSC of the highest and lowest indoor unit of the inlet temperature_HEATINGWith presetting target degree of supercooling
TSCS_HEATINGBetween relationship, judge whether the heating effect of each indoor unit relatively large deviation occurs, wherein the degree of supercooling of indoor unit
TSC_HEATING=Tm-T1.When system judge each indoor unit heating effect deviation it is larger when, then by adjusting the electricity of each indoor unit
Sub- expansion valve (EXV, Electronic Expansion Valve) aperture is modified: by the highest indoor unit of inlet temperature T2
EXV aperture reduces (so that the refrigerant flow of the indoor unit reduces), and inlet temperature T2 minimum indoor unit EXV aperture is increased
(so that the refrigerant flow of the indoor unit increases), so that adjusting refrigerant flow rate reasonable distribution between each indoor unit, solves
Lead to the unbalanced problem of heating effect due to refrigerant unreasonable distribution between the indoor unit caused by the high drop.
Fig. 2 show the flow chart of the modified control method of the high drop of multi-connected machine of the embodiment of the present invention, comprising the following steps:
S1: being communicated between host and each indoor unit, judges the work at present of each indoor unit in entire multi-line system
State.
S2: if it is normal heating state and compressor has been turned on, every by being set to after general operation such as 15min
Temperature sensor at a indoor unit outlet, import and middle part coil pipe starts to detect the outlet temperature T1 of each indoor unit, import
Temperature T2 and middle part coil temperature Tm, and the synchronous electronic expansion valve opening EXV for detecting each indoor unit.
S3: each indoor unit inlet temperature T2 that will test is compared, and finds highest inlet temperature T2maxWith it is minimum into
Mouth temperature T2min.Since refrigerant is caused to be unevenly distributed by gravity, the indoor unit heating effect of high drop installation can be
Difference, the highest indoor unit of inlet temperature are the most indoor unit of refrigerant, the minimum indoor unit of inlet temperature be refrigerant most
Few indoor unit.In embodiments of the present invention, there can be one or more indoor unit highest inlet temperature T2 having the samemax,
There can be one or more indoor unit minimum inlet temperature T2 having the samemin。
S4: system judges current highest inlet temperature T2maxWith minimum inlet temperature T2minBetween inlet temperature difference
Relationship between TSH and presetting target difference TSHs, wherein inlet temperature difference TSH=T2max-T2min, in the present invention
In embodiment, target difference TSHs generally takes 4~6 DEG C.
S5:, can be according to inlet temperature difference TSH and target difference if inlet temperature difference TSH > target difference TSHs
TSHs carries out electronic expansion valve of indoor unit aperture regulation.The corresponding electronic expansion valve of indoor unit aperture of highest inlet temperature is increased
Greatly, the corresponding electronic expansion valve of indoor unit aperture of minimum inlet temperature is reduced.Indoor unit inlet part temperature more can be directly anti-
High drop situation is answered, if determined using indoor unit outlet temperature, actually also receives environment shadow locating for different indoor units
It rings.In other embodiments of the present invention, system judges highest inlet temperature T2 respectively again at this timemaxWith minimum inlet temperature T2min
The degree of supercooling TSC of corresponding indoor unit_HEATINGWith presetting target degree of supercooling TSCS_HEATINGBetween relationship, wherein room
The degree of supercooling TSC of interior machine_HEATING=Tm-T1, target degree of supercooling TSCS_HEATINGGenerally take 6~10 DEG C.When due to air-conditioning heating,
Indoor unit is equivalent to condenser, and it is more accurate effective that its refrigerant bias current degree is characterized by degree of supercooling.
S6: if met | TSC_HEATING-TSCS_HEATING| 2 DEG C of >, then highest inlet temperature T2maxWith minimum import temperature
Spend T2minCorresponding indoor unit EXV aperture is adjusted as shown in Figure 3, in embodiments of the present invention, accordingly by highest import temperature
Spend T2maxCorresponding indoor unit EXV aperture reduces, by minimum inlet temperature T2minCorresponding indoor unit EXV aperture increases, △ T=
|TSC_HEATING-TSCS_HEATING|, specific adjustment step number is as shown in the table: in embodiments of the present invention, concretely as 2 < △
When T≤4 DEG C, corresponding indoor unit EXV aperture regulation step number is F1；When 4 T≤6 DEG C △ <, corresponding indoor unit EXV aperture regulation
Step number is F2；When 6 T≤8 DEG C △ <, corresponding indoor unit EXV aperture regulation step number is F3；As 8 < △ T, corresponding indoor unit
EXV aperture regulation step number is F4；When T≤2 DEG C △, it is believed that each indoor unit temperature difference meets normal demand in system, it is not necessary to carry out
It adjusts.
| △T | △T≤2℃ | 2 T≤4 DEG C < △ | 4 T≤6 DEG C < △ | 6 T≤8 DEG C < △ | 8 < △ T |
| EXV (is opened big) | - | F1 | F2 | F3 | F4 |
| EXV (is turned down) | - | F1 | F2 | F3 | F4 |
According to the difference of the degree of supercooling of indoor unit corresponding to highest inlet temperature and minimum inlet temperature and target degree of supercooling
Absolute value (i.e. △ T) numberical range it is different, the electronic expansion valve opening difference journey of the corresponding indoor unit of highest inlet temperature
The reduction of degree, the different degrees of increasing of the electronic expansion valve opening of the corresponding indoor unit of minimum inlet temperature.Such as according to △ T's
Different adjusting step numbers is arranged in different range, and when △ T is bigger, adjusting step number is bigger, to reduce the temperature difference as early as possible；When △ T is got over
Hour, adjusting step number is smaller, adjusts to avoid excessive.
In view of degree of supercooling is bigger, refrigerant bias current is more serious, therefore EXV aperture regulation step number is also bigger, and F1 generally takes 2~
4pls, F2 generally take 4~6pls, F3 that 6~8pls, F4 is generally taken generally to take 8~10pls, and F1, F2, F3, F4 are electronic expansion
The step number of valve EXV aperture regulation, unit pls.
In embodiments of the present invention, if inlet temperature difference TSH≤target difference TSHs, system think each indoor unit
Heating effect deviation is little, and the heating requirement of indoor unit, exits amendment when meeting different high and low fall in homologous ray.If import
Temperature gap TSH > target difference TSHs, but highest inlet temperature T2maxWith minimum inlet temperature T2minCorresponding indoor unit is same
When meet T≤2 DEG C △, system also thinks that each indoor unit heating effect deviation is little, when meeting in homologous ray different high and low fall
The heating requirement of indoor unit, exits amendment.
In embodiments of the present invention, further include S7: system detects at regular intervals (such as 180s) and determines primary, control
Each indoor unit EXV aperture is made, inlet temperature difference TSH≤target difference TSHs or highest inlet temperature T2 is mademaxWith minimum import
Temperature T2minCorresponding indoor unit meets T≤2 DEG C △ simultaneously, and the two meets first, then exiting amendment；Otherwise it repeats above-mentioned
S2~S6 is modified.
It in embodiments of the present invention, further include S8: if it is determined that system is to shut down or reach warm shutdown status (compressor at this time
Shut down), then exit amendment.
The embodiment of the present invention opens its electric expansion valve by finding out the highest and lowest heating indoor unit of inlet temperature
Degree is adjusted to adjust distribution of the refrigerant flow between each indoor unit, asks to correct refrigerant bias current caused by high drop
Topic, ensure that the homogenization of the heating effect of each indoor unit in multi-line system, improves the comfort level of user.And this method is only right
The heating maximum indoor unit of deviation is adjusted, it is easy to accomplish, control is reliable, also can effectively reduce the energy consumption of whole system.
Fig. 4 show the flow diagram of the modified control method of the high drop of multi-connected machine of the embodiment of the present invention, including following
Step:
S1: detection judges the working condition of each indoor unit in entire multi-line system.
S2: if there is n platform indoor unit is in normal heating state, such as operation 15min is had been turned on.Detect the 1st~
The outlet temperature T1 of n-th indoor unit(1)~T1(n), inlet temperature T2(1)~T2(n)And middle part coil temperature Tm(1)~Tm(n),
And the electronic expansion valve opening EXV of the 1st~n-th indoor unit of synchronous detection(1)~EXV(n)。
S3: each indoor unit inlet temperature T2 that will test(1)~T2(n)It compares, finds highest inlet temperature T2max
With minimum inlet temperature T2min。
S4: system judges current T2maxAnd T2minDifference TSH and presetting target difference TSHs between relationship.?
In the embodiment of the present invention, TSH=6 DEG C of current difference, TSHs=4 DEG C of presetting target difference.
S5: meet the condition of TSH > TSHs, system judges T2 again at this timemaxAnd T2minThe corresponding supercooling of corresponding indoor unit
Spend TSC_HEATINGWith presetting target degree of supercooling TSCS_HEATINGBetween relationship.In embodiments of the present invention, presetting
Target degree of supercooling TSCS_HEATING=8 DEG C.
S6: current highest inlet temperature T2maxThe degree of supercooling TSC of corresponding indoor unit_HEATING=12 DEG C, meet 2 < △ T
≤ 4 DEG C of condition, at this point, highest inlet temperature T2maxCorresponding indoor unit EXV aperture execution turns down order, if current valve step is
150pls, then valve step need to turn down F1 (taking 3pls), it is 157pls；Similarly, if current minimum inlet temperature T2minCorresponding room
The degree of supercooling TSC of interior machine_HEATING=2 DEG C, meet the condition of 4 T≤6 DEG C < △, at this point, minimum inlet temperature T2minCorresponding room
Big order is opened in interior machine EXV aperture execution, if current valve step is 250pls, then valve step need to open big F2 (taking 4pls), it is 254pls.
S7: the every 180s of system detects and determines once, to control each indoor unit EXV aperture, make inlet temperature difference TSH≤mesh
Mark difference TSHs or highest inlet temperature T2maxWith minimum inlet temperature T2minCorresponding indoor unit meets T≤2 DEG C △ simultaneously, and two
Person meets first, exiting amendment；Otherwise above-mentioned S2~S6 is repeated.
S8: if it is determined that system is shutdown or reaches warm shutdown status (compressor shuts down) at this time, amendment is exited.
In embodiments of the present invention, refrigerant bias current is judged according to the difference of the practical degree of supercooling of indoor unit and target degree of supercooling
Degree, and carry out corresponding electric expansion valve EXV aperture regulation, can effectively correct refrigerant bias current situation caused by high drop.System
System is detected and is determined at regular intervals, ensure that dynamic capability for correcting.
Fig. 5 show the schematic diagram of the modified control device of the high drop of multi-connected machine of the embodiment of the present invention, including detection module
And control module, wherein detection module and control module communicate to connect:
Detection module is used to judge the current working status of each indoor unit in entire multi-line system, to normal heating state
And compressor have been turned on operation 15min indoor unit, detect its outlet temperature T1, inlet temperature T2, middle part coil temperature Tm with
And electronic expansion valve opening EXV, the inlet temperature for each indoor unit that will test compare, and find highest inlet temperature T2max
With minimum inlet temperature T2min, judge highest inlet temperature T2maxWith minimum inlet temperature T2minDifference TSH and presetting
Relationship TSHs between target difference notifies control module to carry out electricity if inlet temperature difference TSH > target difference TSHs
Sub- expansion valve opening is adjusted.In other embodiments of the present invention, then respectively judge highest inlet temperature T2maxWith minimum import temperature
Spend T2minThe degree of supercooling TSC of corresponding indoor unit_HEATINGWith presetting target degree of supercooling TSCS_HEATINGBetween relationship, such as
Fruit meets | TSC_HEATING-TSCS_HEATING| 2 DEG C of >, then control module is notified to carry out electronic expansion valve opening adjusting.In this hair
In bright embodiment, there can be one or more indoor unit highest inlet temperature T2 having the samemax, can also there is one or more room
Interior machine minimum inlet temperature T2 having the samemin, inlet temperature difference TSH=T2max-T2min, target difference TSHs generally takes 4
~6 DEG C, the degree of supercooling TSC of indoor unit_HEATING=Tm-T1, target degree of supercooling TSCS_HEATINGGenerally take 6~10 DEG C；
Control module is used for the degree of supercooling TSC according to indoor unit_HEATINGWith target degree of supercooling TSCS_HEATINGDifference, it is right
Highest inlet temperature T2maxWith minimum inlet temperature T2minCorresponding electronic expansion valve of indoor unit EXV aperture carries out as shown in Figure 3
Adjusting, and control above-mentioned detection module and detected every 180s and determine primary, adjust the electric expansion valve of each indoor unit accordingly
Aperture makes inlet temperature difference TSH≤target difference TSHs or highest inlet temperature T2maxWith minimum inlet temperature T2minIt is corresponding
Indoor unit meet T≤2 DEG C △ simultaneously, the two meets it and first completes to correct.In embodiments of the present invention, accordingly by highest into
Mouth temperature T2maxCorresponding indoor unit EXV aperture reduces, by minimum inlet temperature T2minCorresponding indoor unit EXV aperture increase with
Realize amendment, △ T=| TSC_HEATING-TSCS_HEATING|。
In embodiments of the present invention, detection module judges that (compressor stops fortune to shut down or up to warm shutdown status at this time
Turn), then notify control module to exit amendment.
The modified control device of the high drop of the multi-connected machine of the embodiment of the present invention can be according to the highest and lowest import of each indoor unit
Temperature finds the maximum indoor unit of heating effect deviation, and judges refrigerant bias current degree according to its degree of supercooling, adjusts electronics accordingly
Expansion valve EXV aperture, to control refrigerant flow reasonable distribution between each indoor unit, the heating effect in guarantee system is uniform
Change.And only the maximum indoor unit of heating effect deviation is adjusted, the refrigerant bias current situation of high drop can be improved rapidly, reduced
The energy consumption of whole system.
The air conditioner of the embodiment of the present invention uses the modified control device of the high drop of above-mentioned multi-connected machine, and detection module is arranged
And control module detects its inlet temperature, middle part disk if normally heating state and compressor have been turned on operation at the first time
The inlet temperature of tube temperature degree and electronic expansion valve opening, each indoor unit that will test compares, and finds highest import temperature
Degree and minimum inlet temperature, judge between the difference of highest inlet temperature and minimum inlet temperature and presetting target difference
Relationship if inlet temperature difference is greater than target difference, then judges corresponding to highest inlet temperature and minimum inlet temperature respectively
Relationship between the degree of supercooling of indoor unit and presetting target degree of supercooling, and according to the degree of supercooling of indoor unit and target degree of supercooling
Difference adjust electronic expansion valve opening, detection module every the second time detect and determine once, adjust electronic expansion repeatedly
Valve opening exits correction conditions until meeting.
Refrigerant bias current situation can be judged according to inlet temperature and degree of supercooling in the air conditioner of the embodiment of the present invention, and adjusts electricity
Refrigerant flow is adjusted in the aperture of sub- expansion valve, realizes high drop amendment, guarantees heating effect.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this
It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute
Subject to the range of restriction.
Claims (10)
1. a kind of modified control method of high drop of multi-connected machine, which comprises the following steps:
Judge the current working status of each indoor unit；
To normal heating state and compressor has been turned on the indoor unit of operation first time, detects its inlet temperature, middle part coil pipe
Temperature and electronic expansion valve opening；
The inlet temperature for each indoor unit that will test compares, and finds highest inlet temperature and minimum inlet temperature；
Judge the relationship between the highest inlet temperature and the difference and presetting target difference of the minimum inlet temperature；
If the inlet temperature difference is greater than the target difference, according to the inlet temperature difference and the target difference
Relationship adjust the electronic expansion valve opening.
2. the modified control method of the high drop of multi-connected machine according to claim 1, which is characterized in that if it is described into
Mouth temperature gap is greater than the target difference, then according to the adjusting of the relationship of the inlet temperature difference and the target difference
Electronic expansion valve opening include: when the inlet temperature difference be greater than the target difference when, then judge respectively the highest into
Relationship between the degree of supercooling and presetting target degree of supercooling of indoor unit corresponding to mouth temperature and the minimum inlet temperature, and
According to the difference of the degree of supercooling of the indoor unit and the target degree of supercooling adjust the highest inlet temperature and it is described it is minimum into
Mouth temperature corresponds to the electronic expansion valve opening of indoor unit.
3. the modified control method of the high drop of multi-connected machine according to claim 2, which is characterized in that the mistake of the indoor unit
Cold degree is the difference of the middle part coil temperature and the outlet temperature that detect.
4. the modified control method of the high drop of multi-connected machine according to claim 2, which is characterized in that if it is described into
Mouth temperature gap is greater than the target difference, then according to the adjusting of the relationship of the inlet temperature difference and the target difference
If electronic expansion valve opening includes: the degree of supercooling of indoor unit corresponding to the highest inlet temperature and the minimum inlet temperature
It is greater than predetermined threshold with the absolute value of the difference of the target degree of supercooling, then by the corresponding indoor unit of the highest inlet temperature
The electronic expansion valve opening reduces, and the electronic expansion valve opening of the corresponding indoor unit of the minimum inlet temperature is added
Greatly.
5. the modified control method of the high drop of multi-connected machine according to claim 4, which is characterized in that if it is described into
Mouth temperature gap is greater than the target difference, then according to the adjusting of the relationship of the inlet temperature difference and the target difference
Electronic expansion valve opening further comprises: according to indoor unit corresponding to the highest inlet temperature and the minimum inlet temperature
The difference of the absolute value of the difference of degree of supercooling and the target degree of supercooling, the corresponding indoor unit of the highest inlet temperature it is described
The different degrees of reduction of electronic expansion valve opening, the electronic expansion valve opening of the corresponding indoor unit of the minimum inlet temperature
Different degrees of increasing.
6. the modified control method of the high drop of multi-connected machine according to claim 1, which is characterized in that described to exit amendment item
Part is that the inlet temperature difference is less than or equal to the target difference or the highest inlet temperature and the minimum inlet temperature
The difference of the degree of supercooling of corresponding indoor unit and the target degree of supercooling, which is respectively less than, is equal to predetermined threshold.
7. the modified control method of the high drop of multi-connected machine according to claim 1, which is characterized in that further include: if sentenced
The system of breaking is shutdown or reaches warm shutdown status at this time, then exits amendment.
8. the modified control method of the high drop of multi-connected machine according to claim 1, which is characterized in that further include: Mei Ge
Two times were detected and determined once, to adjust the electronic expansion valve opening repeatedly until meeting and exit correction conditions.
9. a kind of modified control device of high drop of multi-connected machine, which is characterized in that including detection module and control module,
In, detection module and control module communicate to connect；The detection module is used to judge the current of each indoor unit in multi-line system
Working condition, to normal heating state and compressor has been turned on the indoor unit of operation first time, detects its inlet temperature, middle part
The inlet temperature of coil temperature and electronic expansion valve opening, each indoor unit that will test compares, and finds highest
Inlet temperature and minimum inlet temperature judge the difference and presetting target difference of highest inlet temperature and minimum inlet temperature
Between relationship；The control module is used to adjust the electricity according to the relationship of the inlet temperature difference and the target difference
Sub- expansion valve opening.
10. a kind of air conditioner, which is characterized in that including the modified control device of the high drop of multi-connected machine as claimed in claim 9.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579038A (en) * | 2019-09-12 | 2019-12-17 | 青岛海信日立空调系统有限公司 | control method of multi-split system |
| CN111486553A (en) * | 2020-03-25 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner control method and device, air conditioner and computer storage medium |
| CN111780372A (en) * | 2020-07-09 | 2020-10-16 | 青岛海尔空调器有限总公司 | Control method of one-driving-multiple air conditioner |
| CN111878962A (en) * | 2020-06-28 | 2020-11-03 | 青岛海尔空调电子有限公司 | Control method of air conditioning system |
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| CN113739340A (en) * | 2021-09-17 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Multi-split coil pipe temperature self-repairing control method and device, air conditioner and storage medium |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261606A (en) * | 2009-04-30 | 2010-11-18 | Panasonic Corp | Multi-room air conditioner |
| CN102278804A (en) * | 2011-08-31 | 2011-12-14 | 宁波奥克斯电气有限公司 | Control method for preventing bias flow of refrigerants during heating of multi-connected air conditioning unit |
| JP2013002742A (en) * | 2011-06-17 | 2013-01-07 | Mitsubishi Heavy Ind Ltd | Multi-split type air conditioning system |
| CN103486691A (en) * | 2013-09-17 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Refrigerant flow control method and device for multi-connected air conditioning system |
| CN103982987A (en) * | 2014-05-07 | 2014-08-13 | 广东美的暖通设备有限公司 | Method and system for preventing bias flowing of refrigerant in multi-split air conditioner and multi-split air conditioner |
| CN105588284A (en) * | 2016-01-04 | 2016-05-18 | 广东美的暖通设备有限公司 | Method and device for controlling distribution of refrigerants of indoor units of air conditioning system |
| CN106052216A (en) * | 2016-06-29 | 2016-10-26 | 宁波奥克斯电气股份有限公司 | Method for controlling electronic expansion valves during multi-connected air conditioning unit heating |
| CN107543290A (en) * | 2017-09-04 | 2018-01-05 | 广东美的暖通设备有限公司 | Multi-online air-conditioning system control method and device and multi-online air-conditioning system |
| CN108613336A (en) * | 2018-05-15 | 2018-10-02 | 青岛海尔空调电子有限公司 | It is a kind of for controlling the method and apparatus of air conditioner, air conditioner, computer readable storage medium |
-
2019
- 2019-06-14 CN CN201910514924.6A patent/CN110186145A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010261606A (en) * | 2009-04-30 | 2010-11-18 | Panasonic Corp | Multi-room air conditioner |
| JP2013002742A (en) * | 2011-06-17 | 2013-01-07 | Mitsubishi Heavy Ind Ltd | Multi-split type air conditioning system |
| CN102278804A (en) * | 2011-08-31 | 2011-12-14 | 宁波奥克斯电气有限公司 | Control method for preventing bias flow of refrigerants during heating of multi-connected air conditioning unit |
| CN103486691A (en) * | 2013-09-17 | 2014-01-01 | 青岛海信日立空调系统有限公司 | Refrigerant flow control method and device for multi-connected air conditioning system |
| CN103982987A (en) * | 2014-05-07 | 2014-08-13 | 广东美的暖通设备有限公司 | Method and system for preventing bias flowing of refrigerant in multi-split air conditioner and multi-split air conditioner |
| CN105588284A (en) * | 2016-01-04 | 2016-05-18 | 广东美的暖通设备有限公司 | Method and device for controlling distribution of refrigerants of indoor units of air conditioning system |
| CN106052216A (en) * | 2016-06-29 | 2016-10-26 | 宁波奥克斯电气股份有限公司 | Method for controlling electronic expansion valves during multi-connected air conditioning unit heating |
| CN107543290A (en) * | 2017-09-04 | 2018-01-05 | 广东美的暖通设备有限公司 | Multi-online air-conditioning system control method and device and multi-online air-conditioning system |
| CN108613336A (en) * | 2018-05-15 | 2018-10-02 | 青岛海尔空调电子有限公司 | It is a kind of for controlling the method and apparatus of air conditioner, air conditioner, computer readable storage medium |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110579038A (en) * | 2019-09-12 | 2019-12-17 | 青岛海信日立空调系统有限公司 | control method of multi-split system |
| CN111486553A (en) * | 2020-03-25 | 2020-08-04 | 海信（山东）空调有限公司 | Air conditioner control method and device, air conditioner and computer storage medium |
| CN111878962A (en) * | 2020-06-28 | 2020-11-03 | 青岛海尔空调电子有限公司 | Control method of air conditioning system |
| CN111780372A (en) * | 2020-07-09 | 2020-10-16 | 青岛海尔空调器有限总公司 | Control method of one-driving-multiple air conditioner |
| CN111780372B (en) * | 2020-07-09 | 2021-11-23 | 青岛海尔空调器有限总公司 | Control method of one-driving-multiple air conditioner |
| CN113483406A (en) * | 2021-06-29 | 2021-10-08 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit, air conditioner and control method for air supply of air conditioner in partition mode |
| CN113739340A (en) * | 2021-09-17 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Multi-split coil pipe temperature self-repairing control method and device, air conditioner and storage medium |
| CN114322269A (en) * | 2022-01-13 | 2022-04-12 | 宁波奥克斯电气股份有限公司 | Refrigerant balance control method and device, multi-split air conditioner and computer readable storage medium |
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Application publication date: 20190830 |