CN104676996B - Method and device for generating initial opening degree of electronic expansion valve - Google Patents
Method and device for generating initial opening degree of electronic expansion valve Download PDFInfo
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- CN104676996B CN104676996B CN201510122410.8A CN201510122410A CN104676996B CN 104676996 B CN104676996 B CN 104676996B CN 201510122410 A CN201510122410 A CN 201510122410A CN 104676996 B CN104676996 B CN 104676996B
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004378 air conditioning Methods 0.000 claims abstract description 162
- 239000003507 refrigerant Substances 0.000 claims abstract description 38
- 238000001816 cooling Methods 0.000 claims description 33
- 239000007788 liquid Substances 0.000 claims description 8
- 238000002474 experimental method Methods 0.000 abstract description 6
- 230000000704 physical effect Effects 0.000 description 10
- 230000005611 electricity Effects 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 5
- 241000208340 Araliaceae Species 0.000 description 4
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 4
- 235000003140 Panax quinquefolius Nutrition 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 4
- 238000000205 computational method Methods 0.000 description 4
- 235000008434 ginseng Nutrition 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- 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
-
- 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
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method and a device for generating an initial opening degree of an electronic expansion valve. The method comprises: reading rated refrigerating capacity Q of air conditionercRated operating frequency fcTarget frequency f after starting of air conditioner and outdoor temperature ToutAnd the temperature T in the roomsinAccording to the rated refrigerating capacity Q of the air conditionercRated operating frequency fcCalculating the target frequency f after the air conditioner is started to generate the working condition refrigerating capacity Q of the air conditioner; according to working condition refrigerating output Q and outdoor temperature ToutAnd the temperature T in the roomsinCalculating and generating a value of mass flow m of the air-conditioning refrigerant; calculating and generating the lift of the electronic expansion valve according to the value of the mass flow m of the air-conditioning refrigerant and the flow area A of the electronic expansion valve; and calculating and generating the initial opening of the electronic expansion valve according to the lift of the electronic expansion valve. The problem of the initial opening of the electronic expansion valve of current air conditioner be according to people's experience or experiment generation, initial opening improper leads to the system to move the back stable slow is solved.
Description
Technical field
The present invention relates to control field, in particular to a kind of generation method of electric expansion valve initial opening and dress
Put.
Background technology
Electric expansion valve initial opening refers to just start shooting the moment in air conditioning system, electric expansion valve preset value size.In electricity
In sub- expansion valve control method, electric expansion valve initial opening stably plays vital effect to air conditioning system, and electronics is swollen
If swollen valve initial opening selects improper, stable very slow of air conditioning system, if electric expansion valve initial opening selects suitable, it is
System can reach quickly to be stablized, and system can be run in the state of an efficiency is higher.
Need exist for illustrating, the theoretical conduct that is configured without of existing electric expansion valve initial opening is instructed, and only relies on
Experiment or experience, often air conditioning system initial opening selection is not especially reasonable, stabilized speed after leading to air conditioning system to be run
Slowly.
Initial opening for the electric expansion valve of existing air-conditioning is experience according to people or experiment generates, initial opening
Improper lead to stable slow problem after system operation, effective solution is not yet proposed at present.
Content of the invention
Present invention is primarily targeted at providing a kind of generation method of electric expansion valve initial opening and device, to solve
The initial opening of the electric expansion valve of existing air-conditioning is the experience or experiment generation according to people, and initial opening is improper to lead to system
Stable slow problem after operation.
To achieve these goals, one side according to embodiments of the present invention, there is provided a kind of electric expansion valve is initial
The generation method of aperture.The method includes：Read rated cooling capacity Q of air-conditioningc, nominal operating frequency fc, air-conditioning start after mesh
Mark frequency f, indoor temperature TsinAnd temperature T of outdoorout；Rated cooling capacity Q according to air-conditioningc, nominal operating frequency fcWith
And the target frequency f after air-conditioning start calculates operating mode refrigerating capacity Q generating air-conditioning；According to operating mode refrigerating capacity Q, indoor temperature
TsinAnd temperature T of outdooroutCalculate the value generating air-conditioning refrigerant mass flow m；According to air-conditioning refrigerant mass flow m
Value, circulation area A of electric expansion valve calculate the lift generating electric expansion valve；Lift according to electric expansion valve calculates and generates
The initial opening of electric expansion valve.
Further, rated cooling capacity Q according to air-conditioningc, nominal operating frequency fcAnd the target frequency after air-conditioning start
The step that f calculates operating mode refrigerating capacity Q generating air-conditioning includes：Calculate operating mode refrigerating capacity Q of air-conditioning, formula according to equation below
For：Wherein, QcFor the rated cooling capacity of air-conditioning, fcFor the nominal operating frequency of air-conditioning, after f is for air-conditioning start
Target frequency.
Further, operating mode refrigerating capacity Q, indoor temperature T according to air-conditioningsinAnd temperature T of outdooroutCalculate and generate
The step of the value of air-conditioning refrigerant mass flow m includes：Calculate the value of operating mode refrigerating capacity m of air-conditioning according to following first formula：Wherein,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,Represent
Temperature is Tout, cold-producing medium enthalpy during mass dryness fraction x=0.
Further, calculate and generate electricity according to the value of air-conditioning refrigerant mass flow m, circulation area A of electric expansion valve
The step of the lift of sub- expansion valve includes：Electric expansion valve is calculated according to the second formula of air-conditioning refrigerant mass flow m
Circulation area A value, wherein, the second formula of air-conditioning refrigerant mass flow m is：According to electronics
The computing formula of circulation area A of expansion valve obtains lift h (B) of electric expansion valve, wherein, the circulation area of electric expansion valve
The computing formula of A is：Wherein, in above-mentioned formula, CDFor flow of electronic expansion valve coefficient, CLFor
Electric expansion valve circulation area coefficient, d, β are respectively electronic expansion valve structure orifice diameter and needle cone angle, and ρ is and outdoor
Temperature ToutCorresponding cold-producing medium Saturate liquid density, △ P is and outdoor temperature ToutCorresponding cold-producing medium two-phase section pressure and room
Interior temperature TsinThe difference of corresponding cold-producing medium two-phase section pressure.
Further, the step of the initial opening generating electric expansion valve according to the lift calculating of electric expansion valve includes：
Calculate the initial opening B of electric expansion valve according to equation below, formula is：Wherein, h (B) is electronics
The lift of expansion valve, B0It is electronic expansion valve opening when 0 for the electronic expansion lift of a valve, δ is between one screw thread of electric expansion valve
Away from corresponding electric expansion valve step number, α is the height of one flight pitch of electric expansion valve.
To achieve these goals, another aspect according to embodiments of the present invention, there is provided a kind of electric expansion valve is initial
The generating means of aperture, this device includes：Reading unit, for reading rated cooling capacity Q of air-conditioningc, nominal operating frequency fc、
Target frequency f after air-conditioning start, indoor temperature TsinAnd temperature T of outdoorout；First computing unit, for according to sky
Rated cooling capacity Q adjustedc, nominal operating frequency fcAnd the target frequency f after air-conditioning start calculates the operating mode refrigeration generating air-conditioning
Amount Q；Second computing unit, for according to operating mode refrigerating capacity Q, indoor temperature TsinAnd temperature T of outdooroutCalculate and generate
The value of air-conditioning refrigerant mass flow m；3rd computing unit, for according to the value of air-conditioning refrigerant mass flow m, electronic expansion
Circulation area A of valve calculates the lift generating electric expansion valve；4th computing unit, based on the lift according to electric expansion valve
Calculate the initial opening generating electric expansion valve.
Further, the first computing unit includes：First computing module, for calculating the operating mode of air-conditioning according to equation below
Refrigerating capacity Q, formula is：Wherein, QcFor the rated cooling capacity of air-conditioning, fcFor the nominal operating frequency of air-conditioning, f is
Target frequency after air-conditioning start.
Further, the second computing unit includes：Second computing module, for calculating air-conditioning according to following first formula
The value of operating mode refrigerating capacity m：Wherein,Expression temperature is Tsin, cold-producing medium during mass dryness fraction x=1
Enthalpy,Expression temperature is Tout, cold-producing medium enthalpy during mass dryness fraction x=0.
Further, the 3rd computing unit includes：3rd computing module, for according to air-conditioning refrigerant mass flow m
Second formula is calculated the value of circulation area A of electric expansion valve, wherein, the second formula of air-conditioning refrigerant mass flow m
For：4th computing module, the computing formula for circulation area A according to electric expansion valve obtains electronics
Lift h (B) of expansion valve, wherein, the computing formula of circulation area A of electric expansion valve is：Its
In, in above-mentioned formula, CDFor flow of electronic expansion valve coefficient, CLFor electric expansion valve circulation area coefficient, d, β are respectively electricity
Sub- expansion valve mechanism orifice diameter and needle cone angle, ρ is and outdoor temperature ToutCorresponding cold-producing medium Saturate liquid density, △ P
It is and outdoor temperature ToutCorresponding cold-producing medium two-phase section pressure and indoor temperature TsinThe difference of corresponding cold-producing medium two-phase section pressure
Value.
Further, the 4th computing unit includes：5th computing module, for calculating electric expansion valve according to equation below
Initial opening B, formula is：Wherein, h (B) is the lift of electric expansion valve, B0For electric expansion valve
Lift is electronic expansion valve opening when 0, and δ is the corresponding electric expansion valve step number of one flight pitch of electric expansion valve, and α is electricity
The height of sub- one flight pitch of expansion valve.
According to embodiments of the present invention, by reading rated cooling capacity Q of air-conditioningc, nominal operating frequency fc, air-conditioning start after
Target frequency f, indoor temperature TsinAnd temperature T of outdoorout, according to rated cooling capacity Q of air-conditioningc, specified operation frequency
Rate fcAnd the target frequency f after air-conditioning start calculates operating mode refrigerating capacity Q generating air-conditioning；According to operating mode refrigerating capacity Q, indoor
Temperature TsinAnd temperature T of outdooroutCalculate the value generating air-conditioning refrigerant mass flow m；According to air-conditioning refrigerant quality stream
The value of amount m, circulation area A of electric expansion valve calculate the lift generating electric expansion valve；Lift meter according to electric expansion valve
Calculate the initial opening generating electric expansion valve, the initial opening solving the electric expansion valve of existing air-conditioning is warp according to people
Test or test generation, initial opening is improper to lead to stable slow problem after system operation
Brief description
The accompanying drawing constituting the part of the application is used for providing a further understanding of the present invention, the schematic reality of the present invention
Apply example and its illustrate, for explaining the present invention, not constituting inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the generation method of electric expansion valve initial opening according to embodiments of the present invention；And
Fig. 2 is the schematic diagram of the generating means of electric expansion valve initial opening according to embodiments of the present invention.
Specific embodiment
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can phases
Mutually combine.To describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
In order that those skilled in the art more fully understand the present invention program, below in conjunction with the embodiment of the present invention
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present invention it is clear that described embodiment is only
The embodiment of a present invention part, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of not making creative work, all should belong to the model of present invention protection
Enclose.
It should be noted that term " first " in description and claims of this specification and above-mentioned accompanying drawing, "
Two " it is etc. for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that such use
Data can exchange in the appropriate case, so that embodiments of the invention described herein.Additionally, term " inclusion " and " tool
Have " and their any deformation it is intended that covering non-exclusive comprising, for example, contain series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps clearly listed or unit, but may include unclear
Listing to Chu or for these processes, method, product or the intrinsic other steps of equipment or unit.
Embodiment one
Embodiments provide a kind of generation method of electric expansion valve initial opening.As shown in figure 1, the method bag
Include step as follows：
Step S10, reads rated cooling capacity Q of air-conditioningc, nominal operating frequency fc, air-conditioning start after target frequency f, room
Interior temperature TsinAnd temperature T of outdoorout.
Specifically, when air conditioning system is just started shooting, air conditioning system can be directed to, according to user, the target temperature that air-conditioning sets
Degree generates a target frequency, then reads above-mentioned target frequency f, and the specified refrigeration of the air-conditioning of air-conditioning itself in this programme
Amount QcWith nominal operating frequency fc.
Need exist for illustrating, rated cooling capacity Q of above-mentioned air-conditioningcWith nominal operating frequency fcCan dispatch from the factory for air-conditioning
The refrigeration standard carrying afterwards, it can be used for characterizing the performance of air conditioner refrigerating.
Step S12, according to rated cooling capacity Q of air-conditioningc, nominal operating frequency fcAnd the target frequency f after air-conditioning start
Calculate operating mode refrigerating capacity Q generating air-conditioning.
Specifically, in this programme, can be according to rated cooling capacity Q of the air-conditioning obtaining in step S10c, specified operation
Frequency fcAnd the target frequency f estimation after air-conditioning start generates operating mode refrigerating capacity Q of air-conditioning.
Step S14, according to operating mode refrigerating capacity Q, indoor temperature TsinAnd temperature T of outdooroutCalculate the air-conditioning system of generation
The value of cryogen mass flow m.
Specifically, in this programme, can be according to operating mode refrigerating capacity Q of the air-conditioning of estimation and reality in above-mentioned steps S12
When outdoor temperature T of the air-conditioning that detectsoutWith air-conditioning temperature T indoorssinTo estimate the stream of air conditioning system refrigerant quality
Amount.
Step S16, calculates and generates electronics according to the value of air-conditioning refrigerant mass flow m, circulation area A of electric expansion valve
The lift of expansion valve.
Step S18, the lift according to electric expansion valve calculates the initial opening generating electric expansion valve.
Specifically, in this programme, after calculating the lift generating above-mentioned electric expansion valve, due to electric expansion valve
The aperture of lift and electric expansion valve is corresponding linear relationship, therefore, it can by this linear relationship by electric expansion valve
Lift calculates the initial opening of electric expansion valve.
Optionally, in a kind of optional embodiment, after generating the initial opening of electric expansion valve, can will be above-mentioned
Initial opening sends to above-mentioned electric expansion valve, is operated according to above-mentioned initial opening by electric expansion valve.
The present embodiment passes through rated cooling capacity Q of moment acquisition air-conditioning of starting shooting in air-conditioningc, nominal operating frequency fc, air-conditioning opens
Target frequency f after machine, indoor temperature TsinAnd temperature T of outdooroutTo calculate the lift of electric expansion valve, then by electricity
Corresponding relation between the lift of sub- expansion valve and electric expansion valve obtains the initial opening of above-mentioned air conditioning system, and the present invention solves
The initial opening of the electric expansion valve of existing air-conditioning is experience according to people or experiment generates, initial opening is improper lead to be
System after running stable slow it is achieved that accelerating the effect of air conditioning system stabilized speed.
Optionally, step S12, according to rated cooling capacity Q of air-conditioningc, nominal operating frequency fcAnd after air-conditioning start
The step that target frequency f calculates operating mode refrigerating capacity Q generating air-conditioning includes：
Calculate operating mode refrigerating capacity Q of air-conditioning according to equation below：
Wherein, QcFor the rated cooling capacity of air-conditioning, fcFor the nominal operating frequency of air-conditioning, f opens for air-conditioning
Target frequency after machine.
Optionally, step S14, according to operating mode refrigerating capacity Q, indoor temperature TsinAnd temperature T of outdooroutCalculate and generate
The step of the value of air-conditioning refrigerant mass flow m includes：
Calculate the value of operating mode refrigerating capacity m of air-conditioning according to following first formula：
Wherein,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,Expression temperature is Tout, cold-producing medium enthalpy during mass dryness fraction x=0.
Need exist for illustrating, above-mentioned two enthalpy can cross the physical properties such as EES (engineering equations countermeasurer) ginseng
Number software is found, then is fitted in correlation formula input control parameter by data fitting software ORIGIN etc..
Optionally, step S16, calculates according to the value of air-conditioning refrigerant mass flow m, circulation area A of electric expansion valve
The step generating the lift of electric expansion valve can include：
First, it is calculated circulation area A of electric expansion valve according to the second formula of air-conditioning refrigerant mass flow m
Value, wherein, the second formula of air-conditioning refrigerant mass flow m is：
Secondly, the computing formula of circulation area A according to electric expansion valve obtains lift h of electric expansion valve (B), its
In, the computing formula of circulation area A of electric expansion valve is：Wherein, in above-mentioned formula, CDFor
Flow of electronic expansion valve coefficient, CLFor electric expansion valve circulation area coefficient, it is straight that d, β are respectively electronic expansion valve structure throttle orifice
Footpath and needle cone angle, ρ is and outdoor temperature ToutCorresponding cold-producing medium Saturate liquid density, △ P is and outdoor temperature ToutCorresponding
Cold-producing medium two-phase section pressure and indoor temperature TsinThe difference of corresponding cold-producing medium two-phase section pressure.
Need exist for illustrating, outdoor temperature ToutCorresponding cold-producing medium two-phase section pressureWith indoor temperature TsinRight
The cold-producing medium two-phase section pressure answeredCan be found by physical properties parametric software such as EES (engineering equations countermeasurer),
Pass through data fitting software ORIGIN etc. again to fit in correlation formula input control parameter.
Optionally, step S18, the step that the lift according to electric expansion valve calculates the initial opening generating electric expansion valve
Including：
Calculate the initial opening B of electric expansion valve according to equation below：
Wherein, h (B) is the lift of electric expansion valve, B0It is when 0 for the electronic expansion lift of a valve
Electronic expansion valve opening, δ is the corresponding electric expansion valve step number of one flight pitch of electric expansion valve, and α is electric expansion valve one
The height of individual flight pitch.
The present invention is by each step above-mentioned it is proposed that a kind of air conditioning system is in start moment electric expansion valve initial opening
Computational methods so that Air-condition system control is more reasonable, run more stable, more energy saving in running.
With reference to concrete application scene, this programme is described：
The present invention can provide a kind of electric expansion valve initial opening computational methods, and circular is divided into following two
Step：
(1) cooling system amount estimation
Convertible frequency air-conditioner has frequency targets value f in system moment of just having started shooting, according to air-conditioning rated cooling capacity QcAnd specified fortune
Line frequency fcEstimation operating mode refrigerating capacity Q, specific formula for calculation is as follows：
According to current operation of air conditioner outdoor temperature ToutWith indoor design temperature TsinEstimation air conditioning system refrigerant mass flow
Amount：
In formula(2)In,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,Represent temperature
For Tout, cold-producing medium enthalpy during mass dryness fraction x=0, above parameter can pass through the physical properties such as EES (engineering equations countermeasurer) ginseng
Number software is found, then is fitted in correlation formula input control parameter by data fitting software ORIGIN etc..
(2) electric expansion valve initial opening estimation
Electric expansion valve circulation area calculation expression isIn formula, A is area, CLFor normal
Number, d, β are electric expansion valve dimensional parameters, and h (B) is the electronic expansion lift of a valve, become to correspond with electronic expansion valve opening and close
System.
Electronic expansion valve opening counter can be released by refrigerant flow and flow of electronic expansion valve computing formula：
In formula (3) and formula (4) formula, CDFor flow of electronic expansion valve coefficient, CLFor electric expansion valve circulation area system
Number, CD、CLIt is constant, its numerical values recited is only relevant with electric expansion valve model, can find by pertinent literature.D, β are respectively
Electronic expansion valve structure orifice diameter and needle cone angle, can be according to different size electronic expansion valve structure parameter determination.
It is and outdoor temperature ToutCorresponding cold-producing medium Saturate liquid density,It is and outdoor temperature ToutCorresponding cold-producing medium two-phase section
Pressure,It is and indoor temperature TsinCorresponding cold-producing medium two-phase section pressure, above parameter can (engineering equations be answered by EES
Device) etc. physical properties parametric software find, then correlation formula input fitted to by data fitting software ORIGIN etc. control
In parameter.H (B) is the electronic expansion lift of a valve, is linear corresponding relation with electronic expansion valve opening, electric expansion valve specification is once
Determine, linear corresponding relation also can determine that, circular is as follows：
In formula (5), B is electronic expansion valve opening, B0It is that electric expansion valve when 0 is opened for the electronic expansion lift of a valve
Degree, δ is the corresponding electric expansion valve step number of one flight pitch of electric expansion valve, and α is one flight pitch of electric expansion valve
Highly.
Need exist for illustrating, above parameter can carry out fitting of a polynomial according to existing physical properties parameter and write
Enter in control program, there is no unknown parameter.The aperture in the system boot moment for the electric expansion valve thus can be calculated.
Embodiment two
The embodiment of the present invention additionally provides a kind of generating means of electric expansion valve initial opening, as shown in Fig. 2 this device
Can include：
Reading unit 20, for reading rated cooling capacity Q of air-conditioningc, nominal operating frequency fc, air-conditioning start after target
Frequency f, indoor temperature TsinAnd temperature T of outdoorout.
Specifically, when air conditioning system is just started shooting, air conditioning system can be directed to, according to user, the target temperature that air-conditioning sets
Degree generates a target frequency, then reads above-mentioned target frequency f, and the specified refrigeration of the air-conditioning of air-conditioning itself in this programme
Amount QcWith nominal operating frequency fc.
Need exist for illustrating, rated cooling capacity Q of above-mentioned air-conditioningcWith nominal operating frequency fcCan dispatch from the factory for air-conditioning
The refrigeration standard carrying afterwards, it can be used for characterizing the performance of air conditioner refrigerating.
First computing unit 22, for rated cooling capacity Q according to air-conditioningc, nominal operating frequency fcAnd after air-conditioning start
Target frequency f calculate generate air-conditioning operating mode refrigerating capacity Q.
Specifically, in this programme, can be according to rated cooling capacity Q of the air-conditioning gettingc, nominal operating frequency fcWith
And the target frequency f estimation after air-conditioning start generates operating mode refrigerating capacity Q of air-conditioning.
Second computing unit 24, for according to operating mode refrigerating capacity Q, indoor temperature TsinAnd temperature T of outdooroutCalculate
Generate the value of air-conditioning refrigerant mass flow m.
Specifically, in this programme, can be according to operating mode refrigerating capacity Q of the air-conditioning of estimation and reality in above-mentioned steps S12
When outdoor temperature T of the air-conditioning that detectsoutWith air-conditioning temperature T indoorssinTo estimate the stream of air conditioning system refrigerant quality
Amount.
3rd computing unit 26, for circulation area A according to the value of air-conditioning refrigerant mass flow m, electric expansion valve
Calculate the lift generating electric expansion valve.
4th computing unit 28, calculates the initial opening generating electric expansion valve for the lift according to electric expansion valve.
Specifically, in this programme, after calculating the lift generating above-mentioned electric expansion valve, due to electric expansion valve
The aperture of lift and electric expansion valve is corresponding linear relationship, therefore, it can by this linear relationship by electric expansion valve
Lift calculates the initial opening of electric expansion valve.
Optionally, in a kind of optional embodiment, after generating the initial opening of electric expansion valve, can will be above-mentioned
Initial opening sends to above-mentioned electric expansion valve, is operated according to above-mentioned initial opening by electric expansion valve.
The present embodiment passes through rated cooling capacity Q of moment acquisition air-conditioning of starting shooting in air-conditioningc, nominal operating frequency fc, air-conditioning opens
Target frequency f after machine, indoor temperature TsinAnd temperature T of outdooroutTo calculate the lift of electric expansion valve, then by electricity
Corresponding relation between the lift of sub- expansion valve and electric expansion valve obtains the initial opening of above-mentioned air conditioning system, and the present invention solves
The initial opening of the electric expansion valve of existing air-conditioning is experience according to people or experiment generates, initial opening is improper lead to be
System after running stable slow it is achieved that accelerating the effect of air conditioning system stabilized speed.
Optionally, above-mentioned first computing unit 22 can include：
First computing module, for calculating operating mode refrigerating capacity Q of air-conditioning according to equation below：
Wherein, QcFor the rated cooling capacity of air-conditioning, fcFor the nominal operating frequency of air-conditioning, f opens for air-conditioning
Target frequency after machine.
Optionally, above-mentioned second computing unit 24 can include：
Second computing module, for calculating the value of operating mode refrigerating capacity m of air-conditioning according to following first formula：
Wherein,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,Expression temperature is Tout, cold-producing medium enthalpy during mass dryness fraction x=0.
Need exist for illustrating, above-mentioned two enthalpy can cross the physical properties such as EES (engineering equations countermeasurer) ginseng
Number software is found, then is fitted in correlation formula input control parameter by data fitting software ORIGIN etc..
Optionally, above-mentioned 3rd computing unit 26 can include：
3rd computing module, is calculated electric expansion valve for the second formula according to air-conditioning refrigerant mass flow m
Circulation area A value, wherein, the second formula of air-conditioning refrigerant mass flow m is：
4th computing module, the computing formula for circulation area A according to electric expansion valve obtains electric expansion valve
Lift h (B), wherein, the computing formula of circulation area A of electric expansion valve is：Wherein, above-mentioned
In formula, CDFor flow of electronic expansion valve coefficient, CLFor electric expansion valve circulation area coefficient, d, β are respectively electric expansion valve knot
Structure orifice diameter and needle cone angle, ρ is and outdoor temperature ToutCorresponding cold-producing medium Saturate liquid density, △ P is and outdoor temp
Degree ToutCorresponding cold-producing medium two-phase section pressure and indoor temperature TsinThe difference of corresponding cold-producing medium two-phase section pressure.
Need exist for illustrating, outdoor temperature ToutCorresponding cold-producing medium two-phase section pressureWith indoor temperature TsinRight
The cold-producing medium two-phase section pressure answeredCan be found by physical properties parametric software such as EES (engineering equations countermeasurer),
Pass through data fitting software ORIGIN etc. again to fit in correlation formula input control parameter.
Optionally, above-mentioned 4th computing unit 28 can include：
5th computing module, for calculating the initial opening B of electric expansion valve according to equation below：
Wherein, h (B) is the lift of electric expansion valve, B0It is when 0 for the electronic expansion lift of a valve
Electronic expansion valve opening, δ is the corresponding electric expansion valve step number of one flight pitch of electric expansion valve, and α is electric expansion valve one
The height of individual flight pitch.
The present invention passes through to execute above-mentioned unit and module, there is provided a kind of air conditioning system is in start moment electronic expansion
The computational methods of valve initial opening, so that Air-condition system control is more reasonable, run more stable, more energy saving in running.
With reference to concrete application scene, this programme is described：
The present invention can provide a kind of electric expansion valve initial opening computational methods, and circular is divided into following two
Step：
(1) cooling system amount estimation
Convertible frequency air-conditioner has frequency targets value f in system moment of just having started shooting, according to air-conditioning rated cooling capacity QcAnd specified fortune
Line frequency fcEstimation operating mode refrigerating capacity Q, specific formula for calculation is as follows：
According to current operation of air conditioner outdoor temperature ToutWith indoor design temperature TsinEstimation air conditioning system refrigerant mass flow
Amount：
In formula(2)In,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,Represent temperature
For Tout, cold-producing medium enthalpy during mass dryness fraction x=0, above parameter can pass through the physical properties such as EES (engineering equations countermeasurer) ginseng
Number software is found, then is fitted in correlation formula input control parameter by data fitting software ORIGIN etc..
(2) electric expansion valve initial opening estimation
Electric expansion valve circulation area calculation expression isIn formula, A is area, CLFor constant,
D, β are electric expansion valve dimensional parameters, and h (B) is the electronic expansion lift of a valve, becomes one-to-one relationship with electronic expansion valve opening.
Electronic expansion valve opening counter can be released by refrigerant flow and flow of electronic expansion valve computing formula：
In formula (3) and formula (4) formula, CDFor flow of electronic expansion valve coefficient, CLFor electric expansion valve circulation area system
Number, CD、CLIt is constant, its numerical values recited is only relevant with electric expansion valve model, can find by pertinent literature.D, β are respectively
Electronic expansion valve structure orifice diameter and needle cone angle, can be according to different size electronic expansion valve structure parameter determination.
It is and outdoor temperature ToutCorresponding cold-producing medium Saturate liquid density,It is and outdoor temperatureCorresponding cold-producing medium is biphase
Area's pressure,It is and indoor temperature TsinCorresponding cold-producing medium two-phase section pressure, above parameter can pass through EES (engineering equations solution
Answer device) etc. physical properties parametric software find, then correlation formula input control is fitted to by data fitting software ORIGIN etc.
In parameter processed.H (B) is the electronic expansion lift of a valve, is linear corresponding relation with electronic expansion valve opening, electric expansion valve specification one
Denier determines, linear corresponding relation also can determine that, circular is as follows：
In formula (5), B is electronic expansion valve opening, B0It is that electric expansion valve when 0 is opened for the electronic expansion lift of a valve
Degree, δ is the corresponding electric expansion valve step number of one flight pitch of electric expansion valve, and α is one flight pitch of electric expansion valve
Highly.
Need exist for illustrating, above parameter can carry out fitting of a polynomial according to existing physical properties parameter and write
Enter in control program, there is no unknown parameter.The aperture in the system boot moment for the electric expansion valve thus can be calculated.
It should be noted that for aforesaid each method embodiment, in order to be briefly described, therefore it is all expressed as a series of
Combination of actions, but those skilled in the art should know, the present invention is not limited by described sequence of movement because
According to the present invention, some steps can be carried out using other orders or simultaneously.Secondly, those skilled in the art also should know
Know, embodiment described in this description belongs to preferred embodiment, involved action and the module not necessarily present invention
Necessary.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, and does not have the portion described in detail in certain embodiment
Point, may refer to the associated description of other embodiment.
It should be understood that disclosed device in several embodiments provided herein, can be by another way
Realize.For example, device embodiment described above is only the schematically division of for example described unit, is only one kind
Division of logic function, actual can have other dividing mode when realizing, for example multiple units or assembly can in conjunction with or can
To be integrated into another system, or some features can be ignored, or does not execute.Another, shown or discussed each other
Coupling or direct-coupling or communication connection can be by some interfaces, the INDIRECT COUPLING of device or unit or communication connection,
It can be electrical or other form.
The described unit illustrating as separating component can be or may not be physically separate, show as unit
The part showing can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.The mesh to realize this embodiment scheme for some or all of unit therein can be selected according to the actual needs
's.
In addition, can be integrated in a processing unit in each functional unit in each embodiment of the present invention it is also possible to
It is that unit is individually physically present it is also possible to two or more units are integrated in a unit.Above-mentioned integrated list
Unit both can be to be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If described integrated unit is realized and as independent production marketing or use using in the form of SFU software functional unit
When, can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part in other words prior art being contributed or all or part of this technical scheme can be in the form of software products
Embody, this computer software product is stored in a storage medium, including some instructions with so that a computer
Equipment (can be personal computer, mobile terminal, server or network equipment etc.) side described in execution each embodiment of the present invention
The all or part of step of method.And aforesaid storage medium includes：USB flash disk, read only memory (ROM, Read-Only Memory),
Random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. are various can be stored
The medium of program code.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a kind of generation method of electric expansion valve initial opening is it is characterised in that include：
Read rated cooling capacity Q of air-conditioningc, nominal operating frequency fc, the target frequency f after air-conditioning start, indoor temperature Tsin
And temperature T of outdoorout；
Rated cooling capacity Q according to described air-conditioningc, nominal operating frequency fcAnd the target frequency f after air-conditioning start calculates and generates
Operating mode refrigerating capacity Q of air-conditioning；
According to described operating mode refrigerating capacity Q, described indoor temperature TsinAnd described outdoor temperature ToutCalculate the air-conditioning system of generation
The value of cryogen mass flow m；
Calculate and generate described electronic expansion according to the value of described air-conditioning refrigerant mass flow m, circulation area A of electric expansion valve
The lift of valve；
Lift according to described electric expansion valve calculates the initial opening generating described electric expansion valve.
2. method according to claim 1 is it is characterised in that rated cooling capacity Q according to described air-conditioningc, specified operation frequency
Rate fcAnd the step of operating mode refrigerating capacity Q of target frequency f calculating generation air-conditioning after air-conditioning start includes：
Calculate operating mode refrigerating capacity Q of described air-conditioning according to equation below：
Wherein, QcFor the rated cooling capacity of described air-conditioning, fcFor the nominal operating frequency of described air-conditioning, f is described
Target frequency after air-conditioning start.
3. method according to claim 1 is it is characterised in that according to described operating mode refrigerating capacity Q, indoor temperature TsinWith
And temperature T of outdooroutThe step calculating the value generating air-conditioning refrigerant mass flow m includes：
Calculate the value of operating mode refrigerating capacity m of described air-conditioning according to following first formula：
Wherein,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,
Expression temperature is Tout, cold-producing medium enthalpy during mass dryness fraction x=0.
4. method according to claim 1 is it is characterised in that according to the value of described air-conditioning refrigerant mass flow m, electronics
The step that circulation area A of expansion valve calculates the lift generating electric expansion valve includes：
It is calculated circulation area A of described electric expansion valve according to the second formula of described air-conditioning refrigerant mass flow m
Value, wherein, the second formula of described air-conditioning refrigerant mass flow m is：
The computing formula of circulation area A according to described electric expansion valve obtains lift h (B) of described electric expansion valve, wherein,
The computing formula of circulation area A of described electric expansion valve is：Wherein, CDFor described electronic expansion
Valve discharge coefficient, CLFor described electric expansion valve circulation area coefficient, it is straight that d, β are respectively described electronic expansion valve structure throttle orifice
Footpath and needle cone angle, ρ is and described outdoor temperature ToutCorresponding cold-producing medium Saturate liquid density, △ P is and described outdoor temperature
ToutCorresponding cold-producing medium two-phase section pressure and indoor temperature TsinThe difference of corresponding cold-producing medium two-phase section pressure.
5. method according to claim 1 is it is characterised in that the described lift according to described electric expansion valve calculates and generates
The step of the initial opening of electric expansion valve includes：
Calculate the initial opening B of described electric expansion valve according to equation below：
Wherein, h (B) is the lift of described electric expansion valve, B0Lift for described electric expansion valve is
Electronic expansion valve opening when 0, δ is the corresponding electric expansion valve step number of described one flight pitch of electric expansion valve, and α is described
The height of one flight pitch of electric expansion valve.
6. a kind of generating means of electric expansion valve initial opening are it is characterised in that include：
Reading unit, for reading rated cooling capacity Q of air-conditioningc, nominal operating frequency fc, air-conditioning start after target frequency f,
Indoor temperature TsinAnd temperature T of outdoorout；
First computing unit, for rated cooling capacity Q according to described air-conditioningc, nominal operating frequency fcAnd after air-conditioning start
Target frequency f calculates operating mode refrigerating capacity Q generating air-conditioning；
Second computing unit, for according to described operating mode refrigerating capacity Q, described indoor temperature TsinAnd described outdoor temperature
ToutCalculate the value generating air-conditioning refrigerant mass flow m；
3rd computing unit, based on according to the described value of air-conditioning refrigerant mass flow m, circulation area A of electric expansion valve
Calculate the lift generating described electric expansion valve；
4th computing unit, calculates for the lift according to described electric expansion valve and generates initially opening of described electric expansion valve
Degree.
7. device according to claim 6 is it is characterised in that described first computing unit includes：
First computing module, for calculating operating mode refrigerating capacity Q of described air-conditioning according to equation below：
Wherein, QcFor the rated cooling capacity of described air-conditioning, fcFor the nominal operating frequency of described air-conditioning, f is described
Target frequency after air-conditioning start.
8. device according to claim 6 is it is characterised in that described second computing unit includes：
Second computing module, for calculating the value of operating mode refrigerating capacity m of described air-conditioning according to following first formula：
Wherein,Expression temperature is Tsin, cold-producing medium enthalpy during mass dryness fraction x=1,
Expression temperature is Tout, cold-producing medium enthalpy during mass dryness fraction x=0.
9. device according to claim 6 is it is characterised in that described 3rd computing unit includes：
3rd computing module, swollen for described electronics is calculated according to the second formula of described air-conditioning refrigerant mass flow m
The value of circulation area A of swollen valve, wherein, the second formula of described air-conditioning refrigerant mass flow m is：
4th computing module, the computing formula for circulation area A according to described electric expansion valve obtains described electronic expansion
Lift h (B) of valve, wherein, the computing formula of circulation area A of described electric expansion valve is：Its
In, in above-mentioned formula, CDFor described flow of electronic expansion valve coefficient, CLFor described electric expansion valve circulation area coefficient, d, β
It is respectively described electronic expansion valve structure orifice diameter and needle cone angle, ρ is and described outdoor temperature ToutCorresponding cold-producing medium
Saturate liquid density, △ P is and described outdoor temperature ToutCorresponding cold-producing medium two-phase section pressure and indoor temperature TsinCorresponding
The difference of cold-producing medium two-phase section pressure.
10. device according to claim 6 is it is characterised in that described 4th computing unit includes：
5th computing module, for calculating the initial opening B of described electric expansion valve according to equation below：
Wherein, h (B) is the lift of described electric expansion valve, B0Lift for described electric expansion valve is
Electronic expansion valve opening when 0, δ is the corresponding electric expansion valve step number of described one flight pitch of electric expansion valve, and α is described
The height of one flight pitch of electric expansion valve.
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| CN104949413B (en) * | 2015-07-07 | 2017-06-30 | 珠海格力电器股份有限公司 | Method and device for acquiring initial opening degree of electronic expansion valve |
| CN106556099B (en) * | 2015-09-25 | 2019-05-17 | 日立江森自控空调有限公司 | The control method of the electric expansion valve of the indoor unit of multi-online air-conditioning system |
| CN105783193B (en) * | 2016-04-13 | 2019-03-08 | Tcl空调器(中山)有限公司 | The initial opening control method and device of electric expansion valve |
| US20190178545A1 (en) * | 2017-12-07 | 2019-06-13 | Dunan Microstaq, Inc. | Heating, ventilating, air conditioning, and refrigeration system with mass flow stabilization |
| CN108224856B (en) * | 2017-12-30 | 2020-07-28 | 广东芬尼克兹节能设备有限公司 | Control method and control device for initial opening degree of electronic expansion valve |
| CN108895610A (en) * | 2018-06-14 | 2018-11-27 | 格力电器（武汉）有限公司 | Energy-saving detection method, device and system for air conditioner, test tool and storage medium |
| CN109084445B (en) * | 2018-08-23 | 2019-10-29 | 宁波奥克斯电气股份有限公司 | A kind of initial opening method of adjustment, device and the air conditioner of electric expansion valve |
| CN110966709B (en) * | 2018-09-29 | 2021-05-11 | 青岛海尔空调器有限总公司 | Method and device for determining initial opening degree of electronic expansion valve |
| CN110966710B (en) * | 2018-09-29 | 2021-05-11 | 青岛海尔空调器有限总公司 | Method and device for determining initial opening degree of electronic expansion valve of air conditioner |
| CN110966708B (en) * | 2018-09-29 | 2021-04-20 | 青岛海尔空调器有限总公司 | Method and device for determining initial opening degree of electronic expansion valve |
| CN109386996A (en) * | 2018-10-08 | 2019-02-26 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve and air conditioning system |
| CN109520099A (en) * | 2018-11-27 | 2019-03-26 | 宁波奥克斯电气股份有限公司 | A kind of initial opening control method, device and the air conditioner of electric expansion valve |
| CN111322801B (en) * | 2020-02-27 | 2021-05-11 | 广东志高暖通设备股份有限公司 | Control method and device of electronic expansion valve |
| CN113465133A (en) * | 2020-03-30 | 2021-10-01 | 广东美的制冷设备有限公司 | Air conditioner control method, air conditioner and medium |
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| CN111854060B (en) * | 2020-06-01 | 2022-08-19 | 青岛海尔空调电子有限公司 | Method and system for determining initial opening value of electronic expansion valve in air conditioning system |
| CN111595073A (en) * | 2020-07-01 | 2020-08-28 | 山东大学 | Control method and control system for initial opening of electronic expansion valve |
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