CN110296519A - A kind of control method of electric expansion valve, control system and multi-online air-conditioning system - Google Patents
A kind of control method of electric expansion valve, control system and multi-online air-conditioning system Download PDFInfo
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- CN110296519A CN110296519A CN201910712555.1A CN201910712555A CN110296519A CN 110296519 A CN110296519 A CN 110296519A CN 201910712555 A CN201910712555 A CN 201910712555A CN 110296519 A CN110296519 A CN 110296519A
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- indoor unit
- expansion valve
- superheat
- outlet temperature
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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
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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
- F24F11/70—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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides the control method, control system and multi-online air-conditioning system of a kind of electric expansion valve, the control method of the electric expansion valve includes: to obtain the tube outlet temperature of the heat exchanger of each indoor unit of operation in refrigeration mode when multi-online air-conditioning system has the operation in refrigeration mode of multiple indoor units；Calculate the average tube outlet temperature of the tube outlet temperature of multiple indoor units；According to the tube outlet temperature of average tube outlet temperature and each indoor unit, the electric expansion valve of each indoor unit is adjusted.Beneficial effects of the present invention: it is compared by tube outlet temperature and average tube outlet temperature, and corresponding electric expansion valve of indoor unit is adjusted with this, so as to carry out reasonable distribution to refrigerant, refrigerant is allocated compared to by preset parameter, it can be more flexible, make the distribution of refrigerant more accurate simultaneously, indoor unit is avoided liquid phenomenon occur back, while indoor unit being made to obtain better refrigeration effect.
Description
Technical field
The present invention relates to air-conditioning technical fields, control method, control system in particular to a kind of electric expansion valve
And multi-online air-conditioning system.
Background technique
In multi-online air-conditioning system, the indoor unit quantity of system is more, while the indoor unit quantity run is often sent out
Changing, while can also have variation using the space of indoor unit, in actual use, need the electronics to each indoor unit swollen
Swollen valve is adjusted, and the aperture of electric expansion valve is increased or reduced, to adjust the refrigerant stream of the heat exchanger of the indoor unit
Amount, so that the cold medium flux of the indoor set heat exchanger can rush a point endothermic gasification, to reach optimal heat transfer effect.
In the related art, generally the aperture of electric expansion valve is adjusted using identical parameter, but due to room
The capacity of interior machine is different, and different indoor loads are different, different when using identical state modulator electronic expansion valve of indoor unit
The line temperature of indoor unit can difference, the aperture of electric expansion valve is also different, be likely to result in certain indoor unit occur it is cold
Matchmaker returns liquid, and the phenomenon of other indoor-unit cooling-mediums deficiency, leads to cold medium flux unreasonable distribution, refrigeration effect is bad.
Summary of the invention
Problems solved by the invention is how to carry out rationally to each electronic expansion valve of indoor unit in multi-online air-conditioning system
Adjusting.
To solve the above problems, the present invention provides a kind of control method of electric expansion valve, comprising:
When multi-online air-conditioning system has the operation in refrigeration mode of multiple indoor units, operation in refrigeration mode is obtained
The tube outlet temperature of the heat exchanger of each indoor unit；
Calculate the average tube outlet temperature of the tube outlet temperature of multiple indoor units；
According to the tube outlet temperature of average the tube outlet temperature and each indoor unit, the electronics for adjusting each indoor unit is swollen
Swollen valve.
In the technical program, compared by the tube outlet temperature and average tube outlet temperature of a certain indoor unit,
Therefore, it is determined that whether the distribution of the refrigerant of indoor unit is reasonable, and is adjusted the corresponding electric expansion valve of the indoor unit with this,
So as to be allocated to refrigerant compared to by preset parameter to the refrigerant progress reasonable distribution in multi-gang air-conditioner device,
Can be more flexible, while making the distribution of refrigerant more accurate, avoid indoor unit from liquid phenomenon occur back, while obtain indoor unit
Obtain better refrigeration effect.
Optionally, the tube outlet temperature according to average the tube outlet temperature and each indoor unit, adjusts each room
The electric expansion valve step of interior machine, specifically includes:
When the tube outlet temperature of a certain indoor unit is less than the average tube outlet temperature, reduce the electricity of the indoor unit
Sub- expansion valve opening；
When the tube outlet temperature of a certain indoor unit is greater than or equal to the average tube outlet temperature, the indoor unit
Electronic expansion valve opening keeps current aperture.
In the technical program, when tube outlet temperature is less than average tube outlet temperature, by the electronic expansion of the indoor unit
Valve opening reduces, so that the flow of refrigerant is reduced during next circulation, the sufficient endothermic gasification of refrigerant of circulation is made with this,
Prevent cold medium flux excessive, it is insufficient that endothermic gasification occurs in refrigerant redundancy, and causes the indoor unit that liquid phenomenon occurs back
Optionally, the tube outlet temperature according to average the tube outlet temperature and each indoor unit, adjusts each room
After the electric expansion valve step of interior machine, the control method of the electric expansion valve further include:
Obtain the line entry temperature of the heat exchanger of each indoor unit；
According to the degree of superheat of the line entry temperature of each indoor unit and current each indoor unit of tube outlet temperature computation, and
Calculate the average degree of superheat of the degree of superheat of multiple indoor units；
According to the degree of superheat of the average degree of superheat and each indoor unit, the electric expansion valve of each indoor unit is adjusted.
In the technical scheme, it compares, can more accurately sentence according to the average degree of superheat and the degree of superheat of each indoor unit
Break the refrigerant distribution condition of every indoor unit, and judged according to comparison, the electric expansion valve of the indoor unit is adjusted, with this
More accurately refrigerant can be allocated, indoor unit is further prevented liquid phenomenon occur back.
Optionally, the degree of superheat according to the average degree of superheat and each indoor unit adjusts the electronic expansion of each indoor unit
Valve step includes:
When the degree of superheat of a certain indoor unit is less than the average degree of superheat-preset temperature, reduce the electronics of the indoor unit
Expansion valve opening；
When the degree of superheat of a certain indoor unit is greater than the average degree of superheat+preset temperature, increase the electronics of the indoor unit
Expansion valve opening；
When the degree of superheat of a certain indoor unit is greater than or equal to the average degree of superheat-preset temperature, and, it is less than or equal to institute
When stating the average degree of superheat+preset temperature, the electronic expansion valve opening of the indoor unit keeps current aperture.
In the technical scheme, it is set with a preset temperature, is combined according to the preset temperature and is carried out the degree of superheat and be averaged
The combination of temperature compares, and can more reasonably be determined, prevents from missing in the degree of superheat and smaller average degree of superheat difference
Operation, can more reasonably be adjusted refrigerant, to prevent the generation of non-return liquid phenomenon and the refrigeration effect of raising indoor unit.
Optionally, the degree of superheat according to the average degree of superheat and each indoor unit adjusts the electronic expansion of each indoor unit
After valve step further include:
It carries out reducing electricity when judging whether there is the degree of superheat of a certain indoor unit less than the average degree of superheat-preset temperature
Sub- expansion valve opening, or, there are carry out increasing electricity when the degree of superheat of a certain indoor unit is greater than the average degree of superheat+preset temperature
Sub- expansion valve opening；
It is that then after the electronic expansion valve regulation of each indoor unit, return is described to have multiple rooms in multi-online air-conditioning system
When the operation in refrigeration mode of interior machine, the tube outlet temperature of the heat exchanger of each indoor unit of operation in refrigeration mode is obtained in real time
Spend step；
It is no, then determine that the electronic expansion valve regulation of all indoor units is completed.
In the technical scheme, it after to electronic expansion valve regulation, re-starts and obtains operation in refrigeration mode
The tube outlet temperature step of the heat exchanger of each indoor unit, the pipeline of new root of laying equal stress on evidence average tube outlet temperature and each indoor unit
Outlet temperature adjusts the electric expansion valve of each indoor unit, with this adequately to the distribution of the refrigerant of each indoor unit carry out judgement and
Control, to further anti-non-return liquid situation and further increase the refrigeration effect of indoor unit.
Optionally, the control method of the electric expansion valve further include:
When the degree of superheat of a certain indoor unit is less than the average degree of superheat-preset temperature, and the electronic expansion of the indoor unit
When valve is in minimum aperture, increase the interior that an at least degree of superheat in the multi-online air-conditioning system is greater than the average degree of superheat
The electronic expansion valve opening of machine.
In the technical scheme, when the electric expansion valve of a certain indoor unit, which has been adjusted to minimum, to be adjusted, pass through increasing
The aperture of other big electric expansion valves, to prevent the indoor unit from liquid phenomenon occur back, with this to each of multi-online air-conditioning system
Electric expansion valve flexible modulation, to be better protected from back the generation of liquid phenomenon.
Optionally, the tube outlet temperature of the heat exchanger of each indoor unit for obtaining operation in refrigeration mode it
Before, further includes:
Judge whether the operation of the indoor unit is normal；
In the normal operation of the indoor unit, the pipeline of the heat exchanger of each indoor unit of operation in refrigeration mode is obtained
Outlet temperature.
It in the technical scheme, further include to each interior before obtaining the tube outlet temperature of heat exchanger of indoor unit
The operating status of machine is judged, to prevent the operation exception because of indoor unit from leading to the aperture regulation control of subsequent electric expansion valve
System inaccuracy.
Optionally, judge the indoor unit operation whether normally include:
Obtain the electronic expansion valve opening of each indoor unit；
When the aperture of the electric expansion valve of each indoor unit changes in 2min is less than 5pls, the fortune of the indoor unit is determined
Row is normal.
In the technical scheme, indoor unit is judged by obtaining the variation of indoor unit electronic expansion valve opening at runtime
Whether there is or not exceptions caused by machine itself in the refrigerant process of circulation, to avoid passing through the aperture regulation to electric expansion valve as far as possible
When refrigerant, occur adjusting inaccurate situation.
A kind of control system of electric expansion valve, comprising:
Acquiring unit, the acquiring unit are used to have the operation in refrigeration mode of multiple indoor units in multi-online air-conditioning system
When, the tube outlet temperature of the heat exchanger of each indoor unit of operation in refrigeration mode is obtained in real time；
The average pipeline of computing unit, the tube outlet temperature that the computing unit is used to calculate multiple indoor units goes out
Mouth temperature；
Control unit, described control unit are used for the tube outlet according to average the tube outlet temperature and each indoor unit
Temperature adjusts the electric expansion valve of each indoor unit.
The control system of electric expansion valve of the invention and the control method of above-mentioned electric expansion valve are compared with the existing technology
Possessed advantage is identical, and details are not described herein.
A kind of multi-online air-conditioning system, computer readable storage medium and processor including being stored with computer program,
When the computer program is read and run by the processor, method as described above is realized.
The control method of air conditioner of the invention and above-mentioned electric expansion valve compared with the existing technology possessed by advantage phase
Together, details are not described herein.
A kind of computer readable storage medium, the computer-readable recording medium storage have computer program, the meter
When calculation machine program is read out by the processor and runs, above-mentioned method is realized.
The control method of computer readable storage medium of the invention and above-mentioned electric expansion valve institute compared with the existing technology
Have the advantage that identical, details are not described herein.
Detailed description of the invention
Fig. 1 is the control method flow chart of electric expansion valve described in the embodiment of the present invention；
Fig. 2 is the electrical structure block diagram of multi-online air-conditioning system described in the embodiment of the present invention；
Fig. 3 is the functional unit schematic diagram of multi-online air-conditioning system described in the embodiment of the present invention.
Description of symbols:
10- outdoor unit；11- outdoor unit heat exchanger；12- compressor；13- four-way valve；20- indoor unit；The room 21-
Interior machine；22- electric expansion valve；23- temperature sensor.
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.
Referring to Fig.1 shown in -3, the invention proposes a kind of control methods of electric expansion valve, comprising:
S1 obtains fortune in refrigeration mode when multi-online air-conditioning system has multiple 21 operations in refrigeration mode of indoor unit
The tube outlet temperature TB of the heat exchanger of capable each indoor unit 21i；
S2 calculates the tube outlet temperature TB of multiple indoor units 21iAverage tube outlet temperature TBave；
S3 is according to the average tube outlet temperature TBaveWith the tube outlet temperature TB of each indoor unit 21i, adjust each room
The electric expansion valve 22 of interior machine 21.
In the related art, when multi-online air-conditioning system is run, generally using identical degree of superheat parameter to each interior
The aperture of the corresponding electric expansion valve of machine is adjusted, but due to the capacity of indoor unit difference, different indoor loads are different,
When using identical state modulator electronic expansion valve of indoor unit, different indoor units line temperature can difference, electronics be swollen
The aperture of swollen valve is also different, is likely to result in certain indoor unit and refrigerant occurs and returns liquid, and the phenomenon of other indoor-unit cooling-mediums deficiency,
Lead to cold medium flux unreasonable distribution, refrigeration effect is bad.
In the present invention, referring to Fig. 2, multi-online air-conditioning system includes outdoor unit 10 and indoor unit 20, outdoor
After the adjusting that the refrigerant of compressor 12 in machine unit 10 passes through four-way valve 13 in six such as each indoor units 21 of outdoor unit 10,
Wherein temperature sensor 23 is provided with for signal piping import in the heat exchange manifold inlet and outlet of each indoor unit 21
Temperature and tube outlet temperature, at the same indoors the heat exchange manifold entrance of machine 21 be respectively provided with electric expansion valve 22 be used to control
The refrigerant for making the heat exchanger of different indoor units 21, in multi-online air-conditioning system, indoor unit 21 can for simultaneously operate or part
Operating flows into outdoor unit 10, and pass through outdoor unit after the heat exchange manifold exit outflow that refrigerant passes through indoor unit 21
Heat exchanger 11 back flows back into compressor 12 after exchanging heat, and the circulation stream of refrigerant is constituted with this.
In the present embodiment, in more 21 operations in refrigeration mode of indoor unit, can be distinguished by temperature sensor 23
Detect the line entry temperature TA of the heat exchanger of indoor unit 21iWith tube outlet temperature TBi, wherein (1,2,3 ... n), and n refers to by i=
N-th be currently running the indoor unit 21 being arranged in order, according to multiple tube outlet temperature TBiCalculate all be currently running
The tube outlet temperature averages of indoor unit 21, i.e., the described average tube outlet temperature TBave, pass through the pipe of a certain indoor unit 21
Way outlet temperature TBaveWith average tube outlet temperature TBaveCompare, therefore, it is determined that the distribution of the refrigerant of indoor unit 21 whether
Rationally, and with this corresponding electric expansion valve 22 of indoor unit 21 is adjusted, so as to in multi-gang air-conditioner device
Refrigerant carries out reasonable distribution, is allocated compared to by preset parameter to refrigerant, can be more flexible, while making refrigerant
It is more accurate to distribute, and avoids indoor unit 21 from liquid phenomenon occur back, while indoor unit 21 being made to obtain better refrigeration effect.
Wherein, described according to the average tube outlet temperature TBaveWith the tube outlet temperature TB of each indoor unit 21i, adjust
22 step of electric expansion valve for saving each indoor unit 21, specifically includes:
As the tube outlet temperature TB of a certain indoor unit 21iLess than the average tube outlet temperature TBaveWhen, reducing should
22 aperture of electric expansion valve of indoor unit 21；In the present embodiment, as the tube outlet temperature TB of indoor unit 21iLess than average pipe
Way outlet temperature TBaveWhen, show the tube outlet temperature TB of the indoor unit 21iIt is relatively low, refrigerant in the heat exchanger of the indoor unit 21
Do not gasified sufficiently, the circuit of the indoor unit 21 has the risk that liquid occurs back, at this time by the corresponding electricity of indoor unit 21
The aperture of sub- expansion valve 22 is turned down, and what is turned down in the present embodiment sets aperture as V1, and V1 is optionally 5-10pls, with
This appropriate reduction flows through the coolant quantity of the indoor unit 21, with this, during next refrigerant circulation, and the heat exchanger of the indoor unit 21
Tube outlet temperature TBiCan increase, the refrigerant in the circuit can sufficient endothermic gasification, prevent cold medium flux excessive, refrigerant
It is insufficient that endothermic gasification occurs in redundancy, and causes the indoor unit 21 that liquid phenomenon occurs back.
As the tube outlet temperature TB of a certain indoor unit 21iMore than or equal to the average tube outlet temperature TBaveWhen,
22 aperture of electric expansion valve of the indoor unit 21 keeps current aperture, it is generally the case that when the tube outlet of a certain indoor unit 21
Temperature TBiMore than or equal to average tube outlet temperature TBave, show 22 aperture of electric expansion valve of the indoor unit 21 it is smaller or
In normal, the endothermic gasification of refrigerant is more abundant on the circuit of the indoor unit 21, and it is smaller liquid probability occur back.
It is described according to the average tube outlet temperature TB in of the invention one optionally embodimentaveWith each interior
The tube outlet temperature TB of machine 21i, after 22 step of electric expansion valve for adjusting each indoor unit 21, the control of the electric expansion valve
Method processed further include:
Obtain the line entry temperature TA of the heat exchanger of each indoor unit 21i；
According to the line entry temperature TA of each indoor unit 21iWith current tube outlet temperature TBiCalculate each indoor unit 21
The degree of superheat, and calculate the average degree of superheat of the degree of superheat of multiple indoor units 21；
According to the degree of superheat of the average degree of superheat and each indoor unit 21, the electric expansion valve 22 of each indoor unit 21 is adjusted.
In the above-described embodiments according to the average tube outlet temperature TAiWith the tube outlet temperature of each indoor unit 21
TBi, adjust the electric expansion valve 22 of each indoor unit 21, but the adjusting be generally merely able to it is cold to the entirety of multi-online air-conditioning system
Matchmaker adjusts and evenly distributes, and the adjusting for being directed to each indoor unit 21 is not accurate enough, e.g., tube outlet temperature TBiIt is being equal to
Average tube outlet temperature TBaveOr tube outlet temperature TBiIt is being greater than and is being closer to average tube outlet temperature TBaveWhen table
The aperture of the electric expansion valve 22 of the bright indoor unit 21 is more normal, in tube outlet temperature TBiRelatively larger than be averaged tube outlet
Temperature TBaveWhen show that the aperture of the electric expansion valve 22 of the indoor unit 21 is smaller, may it is too small, lead to the system of the indoor unit 21
Cold effect may less meet the requirements, as the tube outlet temperature TB of indoor unit 21iLess than average tube outlet temperature TBave, right
When the aperture of the electric expansion valve 22 of the indoor unit 21 turns V1 down, the aperture of electric expansion valve 22 adjusted may not reach
To preset requirement, it can only prevent as far as possible indoor unit 21 from liquid phenomenon occurs back.
In the present embodiment, according to the average tube outlet temperature TAiWith the tube outlet temperature of each indoor unit 21
TBiLater, refrigerant is readjusted and is distributed by multi-online air-conditioning system, obtains the line entry of the heat exchanger of each indoor unit 21 at this time
Temperature TAiWith tube outlet temperature TBi, and according to tube outlet temperature TBiWith line entry temperature TAiCalculate the indoor unit 21
Heat exchange degree, i.e. the line temperature difference TAB of the indoor unit 21i, TABi=TBi-TAi, (1,2,3 ... n), and n refers to by suitable by i=
N-th be currently running the indoor unit 21 of sequence arrangement, wherein according to the heat exchange degree TAB of the indoor unit 21iIt calculates all with refrigeration
The average degree of superheat TAB of the indoor unit 21 of mode operationave, according to average degree of superheat TABaveWith the degree of superheat of each indoor unit 21
TABiIt compares, the refrigerant distribution condition of every indoor unit 21 can be more accurately judged, and judge according to comparison, to the room
The electric expansion valve 22 of interior machine 21 is adjusted, and can be more accurately allocated to refrigerant with this, further prevent indoor unit
21 there is back liquid phenomenon.
Wherein, described according to the average degree of superheat TABaveWith the degree of superheat TAB of each indoor unit 21iAdjust each indoor unit
21 22 step of electric expansion valve includes:
As the degree of superheat TAB of a certain indoor unit 21iLess than the average degree of superheat TABaveWhen preset temperature, reduce the room
22 aperture of electric expansion valve of interior machine 21 is set with a preset temperature in the present embodiment, is combined and is carried out according to the preset temperature
The combination of the degree of superheat and the average degree of superheat compares, and can more reasonably be determined, as the degree of superheat TAB of a certain indoor unit 21i
Less than the average degree of superheat TABaveWhen preset temperature, show the degree of superheat TAB of the indoor unit 21iLess than average value, and position
In outside error range, degree of superheat TABiToo small, which is easy to appear back liquid, will reduce the electricity of the indoor unit 21 at this time
Sub- 22 aperture of expansion valve, to prevent the generation of non-return liquid phenomenon.
As the degree of superheat TAB of a certain indoor unit 21iGreater than the average degree of superheat TABaveWhen+preset temperature, increase the room
22 aperture of electric expansion valve of interior machine 21, in the present embodiment, as the degree of superheat TAB of a certain indoor unit 21iIt is average greater than described
Degree of superheat TABaveWhen preset temperature, show the degree of superheat TAB of the indoor unit 21iGreater than average value, and it is located at outside error range,
Degree of superheat TABiExcessive, the cold medium flux of the indoor unit 21 is smaller, and the refrigeration effect of the indoor unit 21 is poor, needs the room
22 aperture of electric expansion valve of interior machine 21 tunes up, and to increase cold medium flux, improves the refrigeration effect of the indoor unit 21.
The range of preset temperature is 0.3-0.7 DEG C under normal conditions, and preset temperature is 0.5 DEG C in the present embodiment, so that
By the degree of superheat TAB of a certain indoor unit 21iWhen comparing, allow an error amount, it can be more reasonably to overheat with this
Spend TABiJudged, prevents from because of smaller error leading to that electric expansion valve 22 is adjusted, thus there is mistuning section, and
It eventually leads to indoor unit 21 and excessively frequent adjusting occurs, and it is abnormal the operation of multi-online air-conditioning system occur.
As the degree of superheat TAB of a certain indoor unit 21iMore than or equal to the average degree of superheat TABavePreset temperature, and,
Less than or equal to the average degree of superheat TABaveWhen+preset temperature, 22 aperture of electric expansion valve of the indoor unit 21 keeps current
Aperture, at this point, showing that the degree of superheat of the indoor unit 21 is controlled in zone of reasonableness, the refrigeration effect of the indoor unit 21 is preferable, and not
Easily return liquid.
In the present embodiment, the aperture that the electric expansion valve 22 of indoor unit 21 is decreased or increased is default aperture V2,
V2=5-10pls under normal conditions prevents from adjusting excessive or too small and causing so that reasonably electric expansion valve 22 is adjusted
Frequent adjusting.
It is described according to the average degree of superheat TAB in of the invention one optionally embodimentaveWith each indoor unit 21
Degree of superheat TABiAfter 22 step of electric expansion valve for adjusting each indoor unit 21 further include:
Judge whether there is the degree of superheat TAB of a certain indoor unit 21iLess than the average degree of superheat TABavePreset temperature
Shi Jinhang reduces 22 aperture of electric expansion valve, or, there are the degree of superheat TAB of a certain indoor unit 21iGreater than the average degree of superheat
TABaveIt carries out increasing 22 aperture of electric expansion valve when+preset temperature；
It is then after the electric expansion valve 22 of each indoor unit 21 is adjusted, to have described in return in multi-online air-conditioning system more
When a 21 operation in refrigeration mode of indoor unit, the pipe of the heat exchanger of each indoor unit 21 of operation in refrigeration mode is obtained in real time
Way outlet temperature TBiStep passes through the degree of superheat TAB of a certain indoor unit 21 in the above-described embodimentsiWith the average degree of superheat
TABavePreset temperature compares, and is increased, reduced or is protected according to electric expansion valve 22 of the comparative situation to indoor unit 21
The adjusting held, so as to more accurately refrigerant is allocated, anti-non-return liquid or the bad situation of refrigeration effect, in the present embodiment
In, after adjusting to electric expansion valve 22, re-start the heat exchanger for obtaining each indoor unit 21 of operation in refrigeration mode
Tube outlet temperature step TBi, new root of laying equal stress on is according to average tube outlet temperature TBaveWith the tube outlet temperature of each indoor unit 21
Spend TBi, the electric expansion valve 22 of each indoor unit 21 is adjusted, adequately the refrigerant distribution of each indoor unit 21 is judged with this
And control, to further anti-non-return liquid situation and further increase the refrigeration effect of indoor unit 21.
It is no, then determine that the electric expansion valve 22 of all indoor units 21 is adjusted and complete, in each room of multi-online air-conditioning system
After the completion of the electric expansion valve 22 of interior machine 21 is adjusted, i.e., the degree of superheat of each indoor unit 21 is controlled in zone of reasonableness, at this time entirely
The refrigerant distribution of multi-online air-conditioning system, which is adjusted, to be completed, and multi-online air-conditioning system can exit the adjusting control to electric expansion valve 22
System.
In of the invention one optionally embodiment, the control method of the electric expansion valve further include:
As the degree of superheat TAB of a certain indoor unit 21iLess than the average degree of superheat TABavePreset temperature, and the indoor unit
When 21 electric expansion valve 22 is in minimum aperture, increase an at least degree of superheat TAB in the multi-online air-conditioning systemiGreater than institute
State average degree of superheat TABaveIndoor unit 21 22 aperture of electric expansion valve.
In the present embodiment as the degree of superheat TAB for detecting an indoor unit 21iAfter multiple adjust, when still smaller, table
The bright indoor unit 21 still has biggish time liquid risk, but at this time can not degree of superheat TAB to the indoor unit 21iIt is adjusted
Section, to prevent the indoor unit 21 from returning liquid, at this point, the electric expansion valve 22 to indoor units 21 other in multi-online air-conditioning system carries out
It adjusts, to be allocated again to refrigerant, by degree of superheat TABiGreater than average degree of superheat TABaveIndoor unit 21 electronic expansion
Aperture increase default aperture V3, the V3=5-10pls of valve 22, the coolant quantity of the indoor unit 21 is flowed through with appropriate increase, prevents room
Interior 21 bias current of machine, increases the refrigeration effect of the indoor unit 21, while preventing other indoor units 21 from liquid phenomenon occur back.
Wherein, the range of preset temperature is 0.3-0.7 DEG C, and preset temperature is 0.5 DEG C in the present embodiment, so that will be a certain
The degree of superheat TAB of indoor unit 21iWhen comparing, allow an error amount, it can be more reasonably to degree of superheat TAB with thisiInto
Row judgement, prevents from because of smaller error leading to that electric expansion valve 22 is adjusted, to mistuning section occur, and eventually lead to
There is excessively frequent adjusting in indoor unit 21, and it is abnormal the operation of multi-online air-conditioning system occur.
In the present invention, aperture V1, each adjusting that V2, V3 are measured all in accordance with experiment are preset in the adjustment of electric expansion valve 22
When more appropriate aperture, i.e. 5-10pls, wherein V1, V2, V3 can be according to actual set identical value or different values, to meet not
Same use environment.
In of the invention one optionally embodiment, in each indoor unit 21 for obtaining operation in refrigeration mode
The tube outlet temperature TB of heat exchangeriBefore, further includes:
Judge whether the operation of the indoor unit 21 is normal；
In the normal operation of the indoor unit 21, the heat exchanger of each indoor unit 21 of operation in refrigeration mode is obtained
Tube outlet temperature TBi。
In the present embodiment, in the tube outlet temperature TB for the heat exchanger for obtaining indoor unit 21iIt before further include to each
The operating status of indoor unit 21 is judged, to prevent the operation exception because of indoor unit 21 from leading to subsequent electric expansion valve 22
Aperture regulation control inaccuracy.
Optionally, whether the operation for judging the indoor unit normally includes: the electric expansion valve 22 for obtaining each indoor unit 21
Aperture；When the aperture of the electric expansion valve 22 of each indoor unit 21 changes in 2min is less than 5pls, the indoor unit 21 is determined
Normal operation.In the present embodiment, judged by obtaining the variation of electric expansion valve 22 aperture at runtime of indoor unit 21
Whether there is or not exceptions caused by machine itself in the indoor-unit cooling-medium process of circulation, to avoided passing through as far as possible to electric expansion valve 22
When aperture regulation refrigerant, occur adjusting inaccurate situation.
Referring to shown in Fig. 3, the invention also provides a kind of control systems of electric expansion valve, including
Acquiring unit, the acquiring unit are used to have multiple indoor units 21 fortune in refrigeration mode in multi-online air-conditioning system
When row, the tube outlet temperature TB of the heat exchanger of each indoor unit 21 of operation in refrigeration mode is obtained in real timei；
Computing unit, the computing unit are used to calculate the tube outlet temperature TB of multiple indoor unitsiAverage pipe
Way outlet temperature TBave；
Control unit, described control unit are used for according to the average tube outlet temperature TBaveWith the pipe of each indoor unit 21
Way outlet temperature TBi, adjust the electric expansion valve 22 of each indoor unit 21.
In the present invention, pass through the tube outlet temperature TB of a certain indoor unit 21aveWith average tube outlet temperature TBaveIt carries out
Comparison, therefore, it is determined that whether the distribution of the refrigerant of indoor unit 21 is reasonable, and with this to the corresponding electric expansion valve of indoor unit 21
22 are adjusted, so as to in multi-gang air-conditioner device refrigerant carry out reasonable distribution, compared to by preset parameter to cold
Matchmaker is allocated, can be more flexible, while making the distribution of refrigerant more accurate, and indoor unit 21 is avoided liquid phenomenon occur back,
Indoor unit 21 is set to obtain better refrigeration effect simultaneously.
The invention also provides a kind of multi-online air-conditioning systems, the computer-readable storage including being stored with computer program
Medium and processor when the computer program is read and run by the processor, realize method described above, to reach
Each beneficial effect in the embodiment of the present invention.
The invention also provides a kind of computer readable storage medium, the computer-readable recording medium storage has calculating
Machine program when the computer program is read out by the processor and runs, realizes above-mentioned method, to reach in the embodiment of the present invention
Each beneficial effect.
Wherein, storage medium includes: USB flash disk, mobile hard disk, read-only memory, random access memory, magnetic or disk
Etc. the various media that can store program code.
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 (11)
1. a kind of control method of electric expansion valve characterized by comprising
When multi-online air-conditioning system has the operation in refrigeration mode of multiple indoor units, each room of operation in refrigeration mode is obtained
The tube outlet temperature of the heat exchanger of interior machine；
Calculate the average tube outlet temperature of the tube outlet temperature of multiple indoor units；
According to the tube outlet temperature of average the tube outlet temperature and each indoor unit, the electronic expansion of each indoor unit is adjusted
Valve.
2. the control method of electric expansion valve according to claim 1, which is characterized in that described according to the average pipeline
The tube outlet temperature of outlet temperature and each indoor unit adjusts the electric expansion valve step of each indoor unit, specifically includes:
When the tube outlet temperature of a certain indoor unit is less than the average tube outlet temperature, the electronics for reducing the indoor unit is swollen
Swollen valve opening；
When the tube outlet temperature of a certain indoor unit is greater than or equal to the average tube outlet temperature, the electronics of the indoor unit
Expansion valve opening keeps current aperture.
3. the control method of electric expansion valve according to claim 2, which is characterized in that described according to the average pipeline
The tube outlet temperature of outlet temperature and each indoor unit, after the electric expansion valve step for adjusting each indoor unit, the electronics is swollen
The control method of swollen valve further include:
Obtain the line entry temperature of the heat exchanger of each indoor unit；
According to the degree of superheat of the line entry temperature of each indoor unit and current each indoor unit of tube outlet temperature computation, and calculate
The average degree of superheat of the degree of superheat of multiple indoor units；
According to the degree of superheat of the average degree of superheat and each indoor unit, the electric expansion valve of each indoor unit is adjusted.
4. the control method of electric expansion valve according to claim 3, which is characterized in that described according to the average overheat
Spending the electric expansion valve step for adjusting each indoor unit with the degree of superheat of each indoor unit includes:
When the degree of superheat of a certain indoor unit is less than the average degree of superheat-preset temperature, reduce the electronic expansion of the indoor unit
Valve opening；
When the degree of superheat of a certain indoor unit is greater than the average degree of superheat+preset temperature, increase the electronic expansion of the indoor unit
Valve opening；
When the degree of superheat of a certain indoor unit is greater than or equal to the average degree of superheat-preset temperature, and, it is less than or equal to described flat
When the equal degree of superheat+preset temperature, the electronic expansion valve opening of the indoor unit keeps current aperture.
5. the control method of electric expansion valve according to claim 4, which is characterized in that described according to the average overheat
The degree of superheat of degree and each indoor unit is adjusted after the electric expansion valve step of each indoor unit further include:
It is swollen that reduction electronics is carried out when judging whether there is the degree of superheat of a certain indoor unit less than the average degree of superheat-preset temperature
Swollen valve opening, or, swollen there are increase electronics is carried out when the degree of superheat of a certain indoor unit is greater than the average degree of superheat+preset temperature
Swollen valve opening；
It is that then after the electronic expansion valve regulation of each indoor unit, return is described to have multiple indoor units in multi-online air-conditioning system
When operation in refrigeration mode, the tube outlet temperature step of the heat exchanger of each indoor unit of operation in refrigeration mode is obtained in real time
Suddenly；
It is no, then determine that the electronic expansion valve regulation of all indoor units is completed.
6. according to the control method of electric expansion valve as claimed in claim 3 to 5, which is characterized in that the electric expansion valve
Control method further include:
When the degree of superheat of a certain indoor unit is less than the average degree of superheat-preset temperature, and at the electric expansion valve of the indoor unit
When minimum aperture, increases an at least degree of superheat in the multi-online air-conditioning system and be greater than the averagely indoor unit of the degree of superheat
Electronic expansion valve opening.
7. the control method of -5 any electric expansion valves according to claim 1, which is characterized in that be in the acquisition
Before the tube outlet temperature of the heat exchanger of each indoor unit of refrigeration mode operation, further includes:
Judge whether the operation of the indoor unit is normal；
In the normal operation of the indoor unit, the tube outlet of the heat exchanger of each indoor unit of operation in refrigeration mode is obtained
Temperature.
8. the control method of electric expansion valve according to claim 7, which is characterized in that the judgement indoor unit
Operation whether normally include:
Obtain the electronic expansion valve opening of each indoor unit；
When the aperture of the electric expansion valve of each indoor unit changes in 2min is less than 5pls, the operation of the indoor unit is being determined just
Often.
9. a kind of control system of electric expansion valve characterized by comprising
Acquiring unit, the acquiring unit are used for when multi-online air-conditioning system has the operation in refrigeration mode of multiple indoor units,
The tube outlet temperature of the heat exchanger of each indoor unit of operation in refrigeration mode is obtained in real time；
Computing unit, the computing unit are used to calculate the average tube outlet temperature of the tube outlet temperature of multiple indoor units
Degree；
Control unit, described control unit are used for the tube outlet temperature according to average the tube outlet temperature and each indoor unit
Degree, adjusts the electric expansion valve of each indoor unit.
10. a kind of multi-online air-conditioning system, which is characterized in that the computer readable storage medium including being stored with computer program
And processor, when the computer program is read and run by the processor, realize as claim 1-8 is described in any item
Method.
11. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey
Sequence when the computer program is read out by the processor and runs, realizes the method according to claim 1.
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| CN201910712555.1A CN110296519A (en) | 2019-08-02 | 2019-08-02 | A kind of control method of electric expansion valve, control system and multi-online air-conditioning system |
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| CN201910712555.1A CN110296519A (en) | 2019-08-02 | 2019-08-02 | A kind of control method of electric expansion valve, control system and multi-online air-conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111140912A (en) * | 2020-01-19 | 2020-05-12 | 珠海格力电器股份有限公司 | Novel multi-split system and control method thereof |
| CN111520869A (en) * | 2020-05-25 | 2020-08-11 | 广东志高暖通设备股份有限公司 | Accurate refrigerant distribution control method for indoor unit of multi-split system |
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| CN111637526B (en) * | 2020-05-30 | 2021-07-27 | 广东志高暖通设备股份有限公司 | Control method of mixed and collocated multi-split system |
| 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 |
| CN112797599B (en) * | 2020-12-30 | 2022-08-16 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner electronic expansion valve opening control method, adjusting device and air conditioner system |
| CN112797599A (en) * | 2020-12-30 | 2021-05-14 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner electronic expansion valve opening control method, adjusting device and air conditioner system |
| CN113513784A (en) * | 2021-06-30 | 2021-10-19 | 南京天加环境科技有限公司 | Multi-split refrigerant balance control method |
| CN113701372A (en) * | 2021-08-17 | 2021-11-26 | 美的集团武汉制冷设备有限公司 | Control method, device, equipment and storage medium of temperature regulation equipment |
| CN114593516A (en) * | 2022-01-26 | 2022-06-07 | 青岛海尔空调器有限总公司 | Method and device for adjusting air conditioner refrigerant, air conditioner and storage medium |
| CN114484587A (en) * | 2022-02-16 | 2022-05-13 | 宁波奥克斯电气股份有限公司 | Multi-split air conditioner refrigerant balance control method and system and multi-split air conditioner |
| CN115654712A (en) * | 2022-10-24 | 2023-01-31 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner control method and device and multi-connected air conditioner |
| CN115654712B (en) * | 2022-10-24 | 2024-06-14 | 宁波奥克斯电气股份有限公司 | Multi-connected air conditioner control method and device and multi-connected air conditioner |
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