CN109357443A - A kind of electronic expansion valve opening control method, device and multi-line system - Google Patents
A kind of electronic expansion valve opening control method, device and multi-line system Download PDFInfo
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- CN109357443A CN109357443A CN201811216114.4A CN201811216114A CN109357443A CN 109357443 A CN109357443 A CN 109357443A CN 201811216114 A CN201811216114 A CN 201811216114A CN 109357443 A CN109357443 A CN 109357443A
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- Prior art keywords
- temperature
- expansion valve
- aperture
- electronic expansion
- valve opening
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F24F11/70—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
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of electronic expansion valve opening control method, device and multi-line systems, are related to air conditioner technical field.When the liquid pipe temperature sensing package of this method and device for the machine in one loosens, according to the indoor environment temperature digital simulation aperture obtained, and the aperture of electric expansion valve is adjusted to fitting aperture, then suction temperature and evaporating temperature are obtained, then continues the aperture for adjusting electric expansion valve according to suction temperature and evaporating temperature.When liquid pipe temperature sensing package loosens, do not utilize the aperture of machine degree of superheat control electric expansion valve in freezing, but the aperture of electric expansion valve is adjusted to the fitting aperture of electric expansion valve under current indoor environment temperature, the aperture of electric expansion valve is further adjusted according to suction temperature and evaporating temperature again, so that electric expansion valve still is able to accurately control flow when liquid pipe temperature sensing package loosens, to avoid the problem that the small caused poor refrigerating efficiency of electronic expansion valve opening.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of electronic expansion valve opening control method, device and more
On-line system.
Background technique
Multi-line system is a type of user's central air-conditioning, refer to an outdoor unit by piping connection two or
Two use the primary coolant air-conditioning system of direct evaporation and heat-exchange form using air-cooled heat transfer form, interior with upper chamber, outside
System.
However, due to production, installation, transport etc., usually there is the liquid pipe temperature-sensitive of interior machine in the interior machine of multi-line system
The case where packet is loosened or fallen off, the show value that this will cause liquid pipe temperature sensing package is bigger than normal, and so as to cause freezing, the interior machine degree of superheat is calculated
It is less than normal, cause electronic expansion valve opening small, so as to cause interior machine without enough refrigerant circulations, the problem of seriously affecting refrigeration effect.
Summary of the invention
In view of this, the present invention is directed to propose a kind of electronic expansion valve opening control method, device and multi-line system, with
It solves the above problems.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
In a first aspect, appointing the present invention provides a kind of electronic expansion valve opening control method for adjusting multi-line system
The aperture of the electric expansion valve of meaning indoor unit, the electronic expansion valve opening control method include:
When the liquid pipe temperature sensing package of an indoor unit loosens, according to the indoor environment temperature digital simulation aperture obtained；
The aperture of the electric expansion valve is adjusted to the fitting aperture；
Obtain suction temperature and evaporating temperature；
Continue to adjust the aperture of the electric expansion valve according to the suction temperature and the evaporating temperature.
Further, described to continue to adjust the electric expansion valve according to the suction temperature and the evaporating temperature
The step of aperture includes:
Suction superheat is calculated based on the suction temperature and the evaporating temperature；
As SC≤m1,t≥time1When, the electricity just is lowered according to presetting adjustment amount every presetting time interval
The aperture of sub- expansion valve, until the aperture to presetting minimum opening value of the electric expansion valve；Wherein, SC is air-breathing
The degree of superheat, m1For presetting first threshold, t is that the suction superheat is maintained to be less than or equal to presetting first threshold
The time of state, time1For the first preset time.
Further, described to continue to adjust the electric expansion valve according to the suction temperature and the evaporating temperature
The step of aperture further include:
Work as SC > m1When, keep the aperture of the electric expansion valve constant.
Further, described the step of calculating suction superheat based on the suction temperature and the evaporating temperature, includes:
Pass through formula SC=Ts-TpsCalculate suction superheat；Wherein, SC is suction superheat, TsFor suction temperature, TpsFor
Evaporating temperature.
Further, before the step of described according to the indoor environment temperature digital simulation aperture obtained, the electronics
Expansion valve opening control method further include:
Obtain liquid pipe temperature, indoor environment temperature, Current electronic expansion valve opening value, the first tracheae temperature of the indoor unit
Second tracheae temperature of degree and other indoor units；
Based on multiple second tracheae temperature computation tracheae temperature averages；
Based on the liquid pipe temperature, the indoor environment temperature, the Current electronic expansion valve opening value, first gas
Tube temperature degree and the tracheae temperature averages judge whether the liquid pipe temperature sensing package loosens.
Further, described to be based on the liquid pipe temperature, the indoor environment temperature, the Current electronic expansion valve opening
Value, the first tracheae temperature and the tracheae temperature averages judge the step of whether the liquid pipe temperature sensing package loosens packet
It includes:
Work as Ty≥Tai-C1, Dd=Dmin, Tq1>Tq2_aveWhen, judge that the liquid pipe temperature sensing package loosens；Wherein, TyFor liquid pipe temperature
Degree, TaiFor indoor environment temperature, C1For the first presetting temperature threshold, DdFor Current electronic expansion valve opening value, DminIt is pre-
The minimum opening value of setting, Tq1For the first tracheae temperature, Tq2_aveFor tracheae temperature averages.
Further, described to include: according to the step of indoor environment temperature digital simulation aperture obtained
Pass through formula B=D1-k*(D2-Tai) digital simulation aperture；Wherein, B is fitting aperture, TaiFor indoor environment temperature
Degree, k are presetting proportionality coefficient, D1For the first presetting constant coefficient, D2For the second presetting constant coefficient.
Second aspect, the present invention provides a kind of electronic expansion valve opening control devices, appoint for adjusting multi-line system
The aperture of the electric expansion valve of meaning indoor unit, the electronic expansion valve opening control device include:
Computing unit, for being calculated according to the indoor environment temperature obtained when the loosening of the liquid pipe temperature sensing package of an indoor unit
It is fitted aperture；
Aperture adjustment unit, for the aperture of the electric expansion valve to be adjusted to the fitting aperture；
Parameter acquiring unit, for obtaining suction temperature and evaporating temperature；
The aperture adjustment unit is also used to continue to adjust the electricity according to the suction temperature and the evaporating temperature
The aperture of sub- expansion valve.
Further, the aperture adjustment unit is used to calculate air-breathing mistake based on the suction temperature and the evaporating temperature
Temperature；
The aperture adjustment unit is also used to as SC≤m1,t≥time1When, every presetting time interval just according to pre-
The adjustment amount of setting lowers the aperture of the electric expansion valve, until the aperture of the electric expansion valve is opened to presetting minimum
Until angle value；Wherein, SC is suction superheat, m1For presetting first threshold, t be maintain the suction superheat be less than or
Equal to the time of the state of presetting first threshold, time1For the first preset time.
The third aspect, the present invention also provides a kind of multi-line system, the multi-line system includes:
Memory；
Controller；And
Electronic expansion valve opening control device, the electronic expansion valve opening control device are installed on the memory and wrap
One or more software function modules executed by the controller are included, the electronic expansion valve opening control device includes:
Computing unit, for being calculated according to the indoor environment temperature obtained when the loosening of the liquid pipe temperature sensing package of an indoor unit
It is fitted aperture；
Aperture adjustment unit, for the aperture of the electric expansion valve to be adjusted to the fitting aperture；
Parameter acquiring unit, for obtaining suction temperature and evaporating temperature；
The aperture adjustment unit is also used to continue to adjust the electricity according to the suction temperature and the evaporating temperature
The aperture of sub- expansion valve.
Compared with the existing technology, electronic expansion valve opening control method of the present invention, device have the advantage that
When the liquid pipe temperature sensing package of an indoor unit loosens, according to the indoor environment temperature digital simulation aperture obtained, and will
The aperture of electric expansion valve is adjusted to fitting aperture, then obtains suction temperature and evaporating temperature, then according to suction temperature
And evaporating temperature continues to adjust the aperture of electric expansion valve.When liquid pipe temperature sensing package loosens, machine degree of superheat control in refrigeration is not utilized
The aperture of electric expansion valve processed, but the aperture of electric expansion valve is adjusted to electric expansion valve under current indoor environment temperature
It is fitted aperture, then further adjusts the aperture of electric expansion valve according to suction temperature and evaporating temperature, so that electric expansion valve
It still is able to accurately control flow when liquid pipe temperature sensing package loosens, thus refrigeration caused by avoiding electronic expansion valve opening small
The problem of effect difference.
The multi-line system and above-mentioned electronic expansion valve opening control method, device are possessed compared with the existing technology
Advantage is identical, and details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the system block diagram of multi-line system provided in an embodiment of the present invention.
Fig. 2 is the circuit structure block diagram of multi-line system provided in an embodiment of the present invention.
Fig. 3 is the flow chart of electronic expansion valve opening control method provided in an embodiment of the present invention.
Fig. 4 is the specific flow chart of step S307 in Fig. 3.
Fig. 5 is the functional block diagram of electronic expansion valve opening control device provided in an embodiment of the present invention.
Icon: 1- multi-line system；2- outdoor unit；3- indoor unit；4- controller；5- memory；6- parameter collection module；
7- electronic expansion valve opening control device；8- parameter acquiring unit；9- computing unit；10- judging unit；The adjustment of 11- aperture is single
Member.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
The present invention provides a kind of multi-line systems 1, for adjusting indoor environment temperature.Referring to Fig. 1, real for the present invention
The system block diagram of the multi-line system 1 of example offer is provided.Multi-line system 1 includes outdoor unit 2 and multiple indoor units 3, outdoor unit 2
It is connected to each indoor unit 3.
Referring to Fig. 2, being the circuit structure block diagram of multi-line system 1 provided in an embodiment of the present invention.The multi-line system 1
Including memory 5, controller 4, parameter collection module 6 and electronic expansion valve opening control device 7.Wherein, controller 4 with deposit
Reservoir 5 and parameter collection module 6 are electrically connected.The electronic expansion valve opening control device 7 includes at least one can be with software
Or the form of firmware (firmware) is stored in the memory 5.
Wherein, memory 5 can be used for storing software program and unit, as the electric expansion valve in the embodiment of the present invention is opened
Program instruction/unit corresponding to control device 7 and method is spent, controller 4 is swollen by the electronics that operation is stored in memory 5
The software program and unit of swollen valve opening control device, method, thereby executing various function application and data processing, such as originally
The electronic expansion valve opening control method that inventive embodiments provide.
Wherein, the memory 5 may be, but not limited to, random access memory (Random Access Memory,
RAM), read-only memory (Read Only Memory, ROM), programmable read only memory (Programmable Read-Only
Memory, PROM), erasable read-only memory (Erasable Programmable Read-Only Memory, EPROM),
Electricallyerasable ROM (EEROM) (Electric Erasable Programmable Read-Only Memory, EEPROM) etc..
Parameter collection module 6 is used to acquire the operating parameter of multi-line system 1.
Specifically, parameter collection module 6 includes liquid pipe temperature sensing package and at least four temperature sensors.Liquid pipe temperature sensing package with
And multiple temperature sensors are electrically connected with controller 4.
Liquid pipe temperature sensing package is used for collection liquid tube temperature degree, and liquid pipe temperature is transmitted to controller 4.
At least four temperature sensors are respectively used to acquisition indoor environment temperature, suction temperature, evaporating temperature and tracheae
Temperature, and collected indoor environment temperature, suction temperature, evaporating temperature and tracheae temperature are transmitted to controller 4 respectively.
It is to be appreciated that structure shown in Fig. 2 is only to illustrate, multi-line system 1 may also include it is more than shown in Fig. 2 or
The less component of person, or with the configuration different from shown in Fig. 2.Each component shown in Fig. 2 can using hardware, software or
A combination thereof is realized.
First embodiment
The embodiment of the invention provides a kind of electronic expansion valve opening control methods, the feelings for loosening in liquid pipe temperature sensing package
Under condition, moreover it is possible to accurately control flow by electric expansion valve.Referring to Fig. 3, being electronic expansion provided in an embodiment of the present invention
The flow chart of valve opening control method.The electronic expansion valve opening control method includes:
Step S301: liquid pipe temperature, indoor environment temperature, the Current electronic expansion valve opening value, first of indoor unit 3 are obtained
Second tracheae temperature of tracheae temperature and other indoor units 3.
Wherein, liquid pipe temperature, indoor environment temperature, Current electronic expansion valve opening value, the first tracheae temperature are target
The operating parameter of interior machine, machine is that there may be the indoor units 3 of liquid pipe temperature sensing package loose phenomenon in the target.And multiple second gas
Tube temperature degree is respectively other indoor units 3 in all indoor units 3 for including in addition to machine in preceding aim in multi-line system 1
Tracheae temperature.
Step S302: multiple second tracheae temperature computation tracheae temperature averages are based on.
Calculate the average value of the tracheae temperature of other indoor units 3 in addition to machine in target.
Step S303: liquid pipe temperature, indoor environment temperature, Current electronic expansion valve opening value, the first tracheae temperature are based on
And tracheae temperature averages judge whether liquid pipe temperature sensing package loosens, if so, thening follow the steps S304；If it is not, then again
Execute step S301.
Specifically, work as Ty≥Tai-C1, Dd=Dmin, Tq1>Tq2_aveWhen, judge that liquid pipe temperature sensing package loosens；Wherein, TyFor liquid pipe
Temperature, TaiFor indoor environment temperature, C1For the first presetting temperature threshold, DdFor Current electronic expansion valve opening value, DminFor
Presetting minimum opening value, Tq1For the first tracheae temperature, Tq2_aveFor tracheae temperature averages.
When liquid pipe temperature sensing package is in normal condition, liquid pipe temperature is refrigerant after electric expansion valve, liquid pipe temperature sensing package
Collected temperature, in the case of normal refrigeration, liquid pipe temperature-sensitive is far smaller than indoor environment temperature；Conversely, working as liquid pipe temperature-sensitive
When packet is loosened or fallen off, liquid pipe temperature-sensitive obviously rises, to work as Ty≥Tai-C1, i.e. Tai-Ty<C1, i.e., when indoor environment temperature with
When liquid pipe temperature gap is less than the first presetting temperature threshold, show that liquid pipe temperature sensing package is possible to loosen.
It should be noted that the first presetting temperature threshold C1Range be 2~6.In a kind of preferred embodiment,
The first presetting temperature threshold C1It is 3.
Meanwhile if liquid pipe temperature sensing package loosens or falls off, liquid pipe temperature is bigger than normal, but tracheae temperature at this time be it is normal,
Thus the interior machine degree of superheat (the interior machine degree of superheat=tracheae temperature-liquid pipe temperature) is less than normal at this time, thus, the aperture meeting of electric expansion valve
It is gradually decrease to minimum opening value.Therefore, by backward reasoning it is found that working as Dd=Dmin, i.e. Current electronic expansion valve opening value is
When presetting minimum opening value, show that liquid pipe temperature sensing package is possible to loosen.
Again since electronic expansion valve opening value is presetting minimum opening value, and the coolant quantity of evaporator is insufficient, however interior
The heat exchange amount of machine is constant, thus tracheae temperature should be above the tracheae temperature of machine in normal.Thus, work as Tq1>Tq2_ave, i.e., first
When tracheae temperature is greater than tracheae temperature averages, also indicate that liquid pipe temperature sensing package is possible to loosen.
In summary content, by judging whether indoor environment temperature and liquid pipe temperature gap are less than the first presetting temperature
Whether degree threshold value, Current electronic expansion valve opening value are whether presetting minimum opening value and the first tracheae temperature are greater than gas
Pipe temperature averages can more precisely judge whether liquid pipe temperature sensing package loosens.
Step S304: according to the indoor environment temperature digital simulation aperture obtained.
It should be noted that fitting aperture is the indoor unit 3 in the machine outside the model that matches, and indoor unit 3 runs well
In the case where, the substantially aperture of corresponding electric expansion valve under current indoor environment temperature.
Specifically, pass through formula B=D1-k*(D2-Tai) digital simulation aperture；Wherein, B is fitting aperture, TaiFor interior
Environment temperature, k are presetting proportionality coefficient, D1For the first presetting constant coefficient, D2For the second presetting constant coefficient.
Wherein, the first presetting constant coefficient D1Range be 100~300, it is presetting in a kind of preferred embodiment
The first constant coefficient D1It is 150；The range of presetting proportionality coefficient k is 2~10, in a kind of preferred embodiment, is preset
Fixed proportionality coefficient k is 5；The second presetting constant coefficient D2For range be 18~52, in a kind of preferred embodiment, in advance
Second constant coefficient D of setting2It is 27.
It should also be noted that, presetting proportionality coefficient k, D1For the first presetting constant coefficient and D2It is presetting
The range of the second constant coefficient can be determined by the indoor environment temperature of history and corresponding fitting aperture.
Step S305: the aperture of electric expansion valve is adjusted to fitting aperture.
Step S306: suction temperature and evaporating temperature are obtained.
It is to be appreciated that is obtained in this step is the suction temperature and evaporating temperature of machine in target.
Step S307: continue to adjust the aperture of electric expansion valve according to suction temperature and evaporating temperature.
Referring to Fig. 4, being the specific flow chart of step S307.Step S307 includes:
Sub-step S3071: suction superheat is calculated based on suction temperature and evaporating temperature.
Specifically, pass through formula SC=Ts-TpsCalculate suction superheat；Wherein, SC is suction superheat, TsFor air-breathing temperature
Degree, TpsFor evaporating temperature.
Sub-step S3072: judging whether suction superheat is less than or equal to presetting first threshold, if it is, holding
Row sub-step S3074；If it is not, then executing sub-step S3073.
By judging whether suction superheat is less than or equal to presetting first threshold, electric expansion valve can be determined
Whether current aperture is suitable, if suction superheat is less than or equal to presetting first threshold, shows that current aperture does not conform to
It is suitable, it needs to be adjusted；Conversely, indicate that current aperture is suitable, holding.
Sub-step S3073: keep the aperture of electric expansion valve constant.
That is, working as SC > m1When, keep the aperture of electric expansion valve constant；Wherein, SC is suction superheat, m1It is presetting
First threshold.
Sub-step S3074: judgement maintains suction superheat less than or equal to the time of the state of presetting first threshold
Whether the first preset time is greater than or equal to, if it is, executing sub-step S3075；If it is not, then re-executing sub-step
S3074。
In the case where suction superheat is less than or equal to presetting first threshold, further obtains and maintain suction superheat
Degree is less than or equal to the time of the state of presetting first threshold, and then judgement maintains suction superheat to be less than or equal to default
Whether the time of the state of fixed first threshold is greater than or equal to the first preset time, may further determine that the standard of judging result
True property.
Sub-step S3075: electric expansion valve just is lowered according to presetting adjustment amount every presetting time interval
Aperture, until the aperture to presetting minimum opening value of electric expansion valve.
That is, working as SC≤m1,t≥time1When, electricity just is lowered according to presetting adjustment amount every presetting time interval
The aperture of sub- expansion valve, until the aperture to presetting minimum opening value of electric expansion valve；Wherein, SC is suction superheat
Degree, m1For presetting first threshold, t be maintain suction superheat be less than or equal to presetting first threshold state when
Between, time1For the first preset time.
It should be noted that the range of suction superheat SC is -3~6, in a kind of preferred embodiment, suction superheat
Spending SC is 3；The range of presetting adjustment amount is 2~12, and in a kind of preferred embodiment, a presetting adjustment amount is 4.
Second embodiment
Referring to Fig. 5, Fig. 5 is a kind of function for electronic expansion valve opening control device 7 that present pre-ferred embodiments provide
It can module map.It should be noted that electronic expansion valve opening control device 7, basic principle and production provided by the present embodiment
Raw technical effect is identical with above-described embodiment, and to briefly describe, the present embodiment part does not refer to place, can refer to above-mentioned reality
Apply corresponding contents in example.The electronic expansion valve opening control device 7 includes parameter acquiring unit 8, computing unit 9, judging unit
10 and aperture adjustment unit 11.
Wherein, parameter acquiring unit 8 is used to obtain the liquid pipe temperature of an indoor unit 3, indoor environment temperature, Current electronic swollen
Second tracheae temperature of swollen valve opening value, the first tracheae temperature and other indoor units 3.
It is to be appreciated that the parameter acquiring unit 8 can be used for executing step S301 in a kind of preferred embodiment.
Computing unit 9 is used to be based on multiple second tracheae temperature computation tracheae temperature averages.
It is to be appreciated that the computing unit 9 can be used for executing step S302 in a kind of preferred embodiment.
Judging unit 10 is used to be based on liquid pipe temperature, indoor environment temperature, Current electronic expansion valve opening value, the first tracheae
Temperature and tracheae temperature averages judge whether liquid pipe temperature sensing package loosens.
It is to be appreciated that the judging unit 10 can be used for executing step S303 in a kind of preferred embodiment.
Computing unit 9 is also used to when liquid pipe temperature sensing package loosens, according to the indoor environment temperature digital simulation aperture obtained.
It is to be appreciated that the computing unit 9 can be used for executing step S304 in a kind of preferred embodiment.
Aperture adjustment unit 11 is used to for the aperture of electric expansion valve to be adjusted to fitting aperture.
It is to be appreciated that the aperture adjustment unit 11 can be used for executing step S305 in a kind of preferred embodiment.
Parameter acquiring unit 8 is also used to obtain suction temperature and evaporating temperature.
It is to be appreciated that the parameter acquiring unit 8 can be used for executing step S306 in a kind of preferred embodiment.
Aperture adjustment unit 11 is also used to continue to adjust according to suction temperature and evaporating temperature the aperture of electric expansion valve.
Specifically, aperture adjustment unit 11 is used to calculate suction superheat based on suction temperature and evaporating temperature, and judges
Whether suction superheat is less than or equal to presetting first threshold.Aperture adjustment unit 11 is also used to work as SC > m1When, keep electricity
The aperture of sub- expansion valve is constant；As SC≤m1,t≥time1When, every presetting time interval just according to presetting adjustment
Amount lowers the aperture of electric expansion valve, until the aperture to presetting minimum opening value of electric expansion valve.
It is to be appreciated that the aperture adjustment unit 11 can be used for executing step S307, son in a kind of preferred embodiment
Step S3071, sub-step S3072, sub-step S3073, sub-step S3074 and sub-step S3075.
In conclusion electronic expansion valve opening control method of the present invention, device, the liquid pipe sense for the machine in one
When thermometer bulb loosens, according to the indoor environment temperature digital simulation aperture obtained, and the aperture of electric expansion valve is adjusted to be fitted
Aperture then obtains suction temperature and evaporating temperature, and it is swollen then to continue adjustment electronics according to suction temperature and evaporating temperature
The aperture of swollen valve.When liquid pipe temperature sensing package loosens, the aperture of machine degree of superheat control electric expansion valve in freezing is not utilized, but will be electric
The aperture of sub- expansion valve is adjusted to the fitting aperture of electric expansion valve under current indoor environment temperature, then according to suction temperature and
Evaporating temperature further adjusts the aperture of electric expansion valve so that electric expansion valve liquid pipe temperature sensing package loosen when still be able to compared with
Flow is accurately controlled, to avoid the problem that the small caused poor refrigerating efficiency of electronic expansion valve opening.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of electronic expansion valve opening control method, for adjusting the electronic expansion of any indoor unit (3) of multi-line system (1)
The aperture of valve, which is characterized in that the electronic expansion valve opening control method includes:
When the liquid pipe temperature sensing package of an indoor unit (3) loosens, according to the indoor environment temperature digital simulation aperture obtained；
The aperture of the electric expansion valve is adjusted to the fitting aperture；
Obtain suction temperature and evaporating temperature；
Continue to adjust the aperture of the electric expansion valve according to the suction temperature and the evaporating temperature.
2. electronic expansion valve opening control method according to claim 1, which is characterized in that described according to the air-breathing temperature
Degree and the evaporating temperature continue the step of adjusting the aperture of the electric expansion valve and include:
Suction superheat is calculated based on the suction temperature and the evaporating temperature；
As SC≤m1,t≥time1When, it is swollen that the electronics just is lowered according to presetting adjustment amount every presetting time interval
The aperture of swollen valve, until the aperture to presetting minimum opening value of the electric expansion valve；Wherein, SC is suction superheat
Degree, m1For presetting first threshold, t is the state for maintaining the suction superheat to be less than or equal to presetting first threshold
Time, time1For the first preset time.
3. electronic expansion valve opening control method according to claim 2, which is characterized in that described according to the air-breathing temperature
Degree and the evaporating temperature continue the step of adjusting the aperture of the electric expansion valve further include:
Work as SC > m1When, keep the aperture of the electric expansion valve constant.
4. electronic expansion valve opening control method according to claim 2 or 3, which is characterized in that described to be based on the suction
Temperature degree and the evaporating temperature calculate the step of suction superheat and include:
Pass through formula SC=Ts-TpsCalculate suction superheat；Wherein, SC is suction superheat, TsFor suction temperature, TpsFor evaporation
Temperature.
5. electronic expansion valve opening control method according to claim 1, which is characterized in that described according to the room obtained
Before the step of interior environment temperature computation fitting aperture, the electronic expansion valve opening control method further include:
Obtain liquid pipe temperature, indoor environment temperature, Current electronic expansion valve opening value, the first tracheae temperature of the indoor unit (3)
Second tracheae temperature of degree and other indoor units (3)；
Based on multiple second tracheae temperature computation tracheae temperature averages；
Based on the liquid pipe temperature, the indoor environment temperature, the Current electronic expansion valve opening value, the first tracheae temperature
Degree and the tracheae temperature averages judge whether the liquid pipe temperature sensing package loosens.
6. electronic expansion valve opening control method according to claim 5, which is characterized in that described to be based on the liquid pipe temperature
Degree, the indoor environment temperature, the Current electronic expansion valve opening value, the first tracheae temperature and the tracheae temperature
Average value judges that the step of whether the liquid pipe temperature sensing package loosens includes:
Work as Ty≥Tai-C1, Dd=Dmin, Tq1>Tq2_aveWhen, judge that the liquid pipe temperature sensing package loosens；Wherein, TyFor liquid pipe temperature, Tai
For indoor environment temperature, C1For the first presetting temperature threshold, DdFor Current electronic expansion valve opening value, DminIt is presetting
Minimum opening value, Tq1For the first tracheae temperature, Tq2_aveFor tracheae temperature averages.
7. electronic expansion valve opening control method according to claim 5, which is characterized in that described according to the interior obtained
The step of environment temperature digital simulation aperture includes:
Pass through formula B=D1-k*(D2-Tai) digital simulation aperture；Wherein, wherein B is fitting aperture, TaiFor indoor environment temperature
Degree, k are presetting proportionality coefficient, D1For the first presetting constant coefficient, D2For the second presetting constant coefficient.
8. a kind of electronic expansion valve opening control device, for adjusting the electronic expansion of any indoor unit (3) of multi-line system (1)
The aperture of valve, which is characterized in that the electronic expansion valve opening control device (7) includes:
Computing unit (9), for the indoor environment temperature meter when the liquid pipe temperature sensing package of an indoor unit (3) loosens, according to acquisition
Calculate fitting aperture；
Aperture adjustment unit (11), for the aperture of the electric expansion valve to be adjusted to the fitting aperture；
Parameter acquiring unit (8), for obtaining suction temperature and evaporating temperature；
The aperture adjustment unit (11) is also used to continue to adjust the electricity according to the suction temperature and the evaporating temperature
The aperture of sub- expansion valve.
9. electronic expansion valve opening control device according to claim 8, which is characterized in that the aperture adjustment unit
(11) for calculating suction superheat based on the suction temperature and the evaporating temperature；
The aperture adjustment unit (11) is also used to as SC≤m1,t≥time1When, every presetting time interval just according to pre-
The adjustment amount of setting lowers the aperture of the electric expansion valve, until the aperture of the electric expansion valve is opened to presetting minimum
Until angle value；Wherein, SC is suction superheat, m1For presetting first threshold, t be maintain the suction superheat be less than or
Equal to the time of the state of presetting first threshold, time1For the first preset time.
10. a kind of multi-line system, which is characterized in that the multi-line system (1) includes:
Memory (5)；
Controller (4)；And
Electronic expansion valve opening control device (7), the electronic expansion valve opening control device (7) are installed on the memory
(5) and including the software function module that one or more is executed by the controller (4), the electronic expansion valve opening control dress
Setting (7) includes:
Computing unit (9), for the indoor environment temperature meter when the liquid pipe temperature sensing package of an indoor unit (3) loosens, according to acquisition
Calculate fitting aperture；
Aperture adjustment unit (11), for the aperture of the electric expansion valve to be adjusted to the fitting aperture；
Parameter acquiring unit (8), for obtaining suction temperature and evaporating temperature；
The aperture adjustment unit (11) is also used to continue to adjust the electricity according to the suction temperature and the evaporating temperature
The aperture of sub- expansion valve.
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