CN104930773B - Control method and device of electronic expansion valve and air conditioner - Google Patents
Control method and device of electronic expansion valve and air conditioner Download PDFInfo
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- CN104930773B CN104930773B CN201510395739.1A CN201510395739A CN104930773B CN 104930773 B CN104930773 B CN 104930773B CN 201510395739 A CN201510395739 A CN 201510395739A CN 104930773 B CN104930773 B CN 104930773B
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000004378 air conditioning Methods 0.000 claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 21
- 230000001052 transient effect Effects 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 11
- 238000001704 evaporation Methods 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 238000004148 unit process Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- 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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- 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)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a control method and device of an electronic expansion valve and an air conditioner. The method comprises the following steps: starting a compressor of the air conditioner; controlling the opening degree of an electronic expansion valve of the air conditioner to a first opening degree value, and starting timing; detecting a first operation parameter and a first operation condition of the compressor, wherein the first operation parameter is the operation parameter of the compressor when the timing time is between a first preset time and a second preset time, and the first operation condition is the operation condition of the compressor when the timing time is between the first preset time and the second preset time; calculating a second opening value according to the first operating parameter and the first operating condition; and controlling the opening degree of the electronic expansion valve to a second opening degree value. The invention solves the problem that the speed of the compressor in the air conditioning system reaching the stable operation state after starting is slow due to low control accuracy of the electronic expansion valve in the related technology.
Description
Technical field
The present invention relates to air-conditioner field, in particular to the control method and device and sky of a kind of electric expansion valve
Adjust device.
Background technology
At present, with energy-saving and emission-reduction increasingly deeply, to the examination of the efficiency of small-sized variable-frequency one-to-one air-conditioning system via
Past fixed point efficiency, seasonal energy efficiency are transitioned into annual efficiency examination, and used in original frequency conversion one-to-one air-conditioning system
Capillary section stream unit cannot meet the regulation requirement of condition range wide and big refrigerant flow excursion, therefore push away
Extensive use of the electric expansion valve in small-sized variable-frequency one-to-one air-conditioning system is moved.
For the control of electric expansion valve in air-conditioning system, mostly using based on detection delivery temperature in correlation technique
PID closed-loop feedback control methods, are controlled by the multiple preset parameters for pre-setting to the aperture of electric expansion valve.So
And, set because the multiple preset parameters for pre-setting are directed to compressor arrival steady operational status, therefore in compressor
Steady operational status are reached during this to compressor after startup, and the aperture control accuracy of electric expansion valve is relatively low, electronic expansion
There is toning in the aperture of valve or the aperture control fluctuation of electric expansion valve is larger, so as to arrive compressor after causing compressor start
The time for reaching steady operational status is more long, and speed is slower.
For, because the control accuracy to electric expansion valve is relatively low, compressor is opened in causing air-conditioning system in correlation technique
The slow problem of steady operational status is reached after dynamic, effective solution is not yet proposed at present.
The content of the invention
Control method and device and air-conditioner it is a primary object of the present invention to provide a kind of electric expansion valve, to solve
Because the control accuracy to electric expansion valve is relatively low in correlation technique, cause to reach stabilization in air-conditioning system after compressor start
The slow problem of running status.
To achieve these goals, according to an aspect of the invention, there is provided a kind of control method of electric expansion valve.
The method includes：Start the compressor of air-conditioner；The aperture of electric expansion valve of air-conditioner is controlled to the first opening value, and is started
Timing；First operational factor and the first service condition of compressor are detected, wherein, the first operational factor is timing time first
The operational factor of compressor when between Preset Time and the second Preset Time, the first service condition is timing time default first
The service condition of compressor when between time and the second Preset Time, the second Preset Time is run to up to stabilization for preset compressor
The time of running status；Second opening value is calculated according to the first operational factor and the first service condition；And control electronic expansion
The aperture of valve is to the second opening value.
Further, after the compressor for starting air-conditioner, control air-conditioner electric expansion valve aperture to the
Before one opening value, the method also includes：Judge whether compressor is first upper electricity；If compressor is first upper electricity, detection
Second operational factor and the second service condition of compressor, wherein, the second operational factor be start air-conditioner compressor it
Afterwards, control air-conditioner electric expansion valve aperture to the first opening value before compressor operational factor, second operation bar
Part is after the compressor for starting air-conditioner, to be pressed before aperture to first opening value of the electric expansion valve of control air-conditioner
The service condition of contracting machine；First opening value is calculated according to the second operational factor and the second service condition；If compressor is not just
Secondary upper electricity, detects second operational factor and the second service condition of compressor, wherein, the second operational factor is to start air-conditioner
Compressor after, control air-conditioner electric expansion valve aperture to the first opening value before compressor operational factor,
Second service condition is after the compressor for starting air-conditioner, to be opened to first in the aperture of the electric expansion valve of control air-conditioner
The service condition of compressor before angle value；Judge whether to have stored opening value corresponding with the second service condition；If stored
Opening value corresponding with the second service condition, using the corresponding opening value of the second service condition as the first opening value, if do not deposited
Storage opening value corresponding with the second service condition, the first opening value is calculated according to the second operational factor and the second service condition.
Further, calculating the first opening value according to the second operational factor and the second service condition includes：It is pre- by first
Imputation method calculates the first opening value, wherein, the first preset algorithm is：P=b1Tout+b2Tin+b3F+b4Nout+b5Nin, the second operation
Condition includes association indoor environment temperature TinWith outdoor environment temperature Tout, the second operational factor include compressor operating frequency F,
Indoor rotation speed of fan NinWith outside rotation speed of fan Nout, b1、b2、b3、b4And b5It is constant coefficient, P is the first opening value.
Further, calculating the second opening value according to the first operational factor and the first service condition includes：According to the first fortune
Line parameter and the first service condition calculate first object delivery temperature；The first exhaust temperature of compressor is detected, wherein, first row
Temperature degree is the delivery temperature of compressor when timing time is between the first Preset Time and the second Preset Time；Judge the first mesh
Whether mark delivery temperature is more than the first preset difference value with the difference of first exhaust temperature；And if first object delivery temperature with
The difference of first exhaust temperature is more than the first preset difference value, according to first object delivery temperature and the difference meter of first exhaust temperature
Calculate the second opening value.
Further, calculating first object delivery temperature according to the first operational factor and the first service condition includes：Pass through
Second preset algorithm calculates first object delivery temperature, wherein, the second preset algorithm is：Tds_i=(Tds_l-i+Td_i)/2, Tds-i
It is the first object delivery temperature at the i-th moment, Tds-l-iIt is the transient target delivery temperature at the i-th moment, Td-iIt is the of the i-th moment
One delivery temperature.
Further, transient target delivery temperature is calculated by following steps：Calculated by the 3rd preset algorithm and faced
When target exhaust temperature, wherein, the 3rd preset algorithm is：
Tds_l=a1Te 2+a2Tc 2+a3TeTc+a4Te+a5Tc+a6F2+a7F+a8, Te is evaporating temperature, and Tc is condensation temperature, F
It is compressor operating frequency, a1、a2、a3、a4、a5、a6、a7And a8It is constant coefficient, Tds-lIt is transient target delivery temperature.
Further, after aperture to second opening value of control electric expansion valve, the method also includes：Detection compression
3rd operational factor of machine and the 3rd service condition, wherein, after the 3rd operational factor reaches the second Preset Time for timing time
The operational factor of compressor, the 3rd service condition reaches the service condition of compressor after the second Preset Time for timing time；Root
The second target exhaust temperature is calculated according to the 3rd operational factor and the 3rd service condition；The second exhaust temperature of compressor is detected, its
In, second exhaust temperature reaches the delivery temperature of compressor after the second Preset Time for timing time；Judge the second target exhaust
Whether temperature is more than the second preset difference value with the difference of second exhaust temperature；If the second target exhaust temperature and second row temperature
The difference of degree is more than the second preset difference value, according to the second target exhaust temperature and the aperture of mathematic interpolation the 3rd of second exhaust temperature
Value；And the aperture of control electric expansion valve is to the 3rd opening value.
Further, calculating the second target exhaust temperature according to the 3rd operational factor and the 3rd service condition includes：Pass through
4th preset algorithm calculates the second target exhaust temperature, wherein, the 4th preset algorithm is：Tds-i=(Tds_i-1+Tds_l-i)/2,
Tds-iIt is second target exhaust temperature at the i-th moment, Tds-i-1It is the first object delivery temperature at the i-th -1 moment, Tds-l-iIt is i-th
The transient target delivery temperature at moment.
To achieve these goals, according to another aspect of the present invention, there is provided a kind of control device of electric expansion valve.
The device includes：Start unit, the compressor for starting air-conditioner；First control unit, the electronics for controlling air-conditioner
The aperture of expansion valve starts timing to the first opening value；First detection unit, the first operational factor for detecting compressor
With the first service condition, wherein, the first operational factor be timing time between the first Preset Time and the second Preset Time when
The operational factor of compressor, the first service condition is compression when timing time is between the first Preset Time and the second Preset Time
The service condition of machine, the second Preset Time runs to the time up to steady operational status for preset compressor；First computing unit,
For calculating the second opening value according to the first operational factor and the first service condition；And second control unit, for controlling electricity
The aperture of sub- expansion valve is to the second opening value.
Further, the first computing unit includes：First computing module, for being run according to the first operational factor and first
Condition calculates first object delivery temperature；Detection module, the first exhaust temperature for detecting compressor, wherein, first exhaust
Temperature is the delivery temperature of compressor when timing time is between the first Preset Time and the second Preset Time；Judge module, uses
Whether it is more than the first preset difference value in the difference for judging first object delivery temperature and first exhaust temperature；And second calculate mould
Block, in the case of in the difference of first object delivery temperature and first exhaust temperature more than the first preset difference value, according to the
The opening value of mathematic interpolation second of one target exhaust temperature and first exhaust temperature.
Further, the device also includes：Second detection unit, the 3rd operational factor and the 3rd for detecting compressor
Service condition, wherein, the 3rd operational factor reaches the operational factor of compressor after the second Preset Time, the 3rd fortune for timing time
Row condition reaches the service condition of compressor after the second Preset Time for timing time；Second computing unit, for according to the 3rd
Operational factor and the 3rd service condition calculate the second target exhaust temperature；3rd detection unit, for detecting compressor second
Delivery temperature, wherein, second exhaust temperature reaches the delivery temperature of compressor after the second Preset Time for timing time；Judge single
Unit, for judging the second target exhaust temperature with the difference of second exhaust temperature whether more than the second preset difference value；3rd calculates
Unit, in the case of in the difference of the second target exhaust temperature and second exhaust temperature more than the second preset difference value, according to
The opening value of mathematic interpolation the 3rd of the second target exhaust temperature and second exhaust temperature；And the 3rd control unit, for controlling
The aperture of electric expansion valve is to the 3rd opening value.
To achieve these goals, according to another aspect of the present invention, there is provided a kind of air-conditioner.The air-conditioner includes this
The control device of any one electric expansion valve for providing is provided.
By the present invention, due to before compressor reaches steady operational status, being carried out to operational factor and service condition
Detection, determines the control aperture to electric expansion valve so that electric expansion valve according to the operational factor and service condition for detecting
Aperture match with current operating parameter and current operating condition, improve the control accuracy to electric expansion valve so that
Improve the speed for reaching steady operational status in air-conditioning system after compressor start.Therefore solve in correlation technique due to right
The control accuracy of electric expansion valve is relatively low, cause to be reached after compressor start in air-conditioning system the speed of steady operational status compared with
Slow problem.
Brief description of the drawings
The accompanying drawing for constituting the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate, for explaining the present invention, not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the flow chart of the control method of electric expansion valve according to a first embodiment of the present invention；
Fig. 2 be electric expansion valve according to a first embodiment of the present invention control method in air-conditioning system schematic diagram；
Fig. 3 is the flow chart of the control method of electric expansion valve according to a second embodiment of the present invention；And
Fig. 4 is the schematic diagram of the control device of electric expansion valve according to embodiments of the present invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order that those skilled in the art more fully understand application scheme, below in conjunction with the embodiment of the present application
Accompanying drawing, is clearly and completely described to the technical scheme in the embodiment of the present application, it is clear that described embodiment is only
The embodiment of the application part, rather than whole embodiments.Based on the embodiment in the application, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, should all belong to the model of the application protection
Enclose.
It should be noted that term " first ", " in the description and claims of this application 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 so using
Data can exchange in the appropriate case, so as to embodiments herein described herein.Additionally, term " including " and " tool
Have " and their any deformation, it is intended that covering is non-exclusive to be included, for example, containing 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 without clear
It is listing to Chu or for these processes, method, product or other intrinsic steps of equipment or unit.
A kind of embodiments in accordance with the present invention, there is provided control method of electric expansion valve.
Fig. 1 is the flow chart of the control method of electric expansion valve according to a first embodiment of the present invention.As shown in figure 1, should
Method is comprised the following steps：
Step S101, starts the compressor of air-conditioner.
Step S102, controls the aperture of electric expansion valve of air-conditioner to the first opening value, and start timing.
Above-mentioned the first opening value is that the electric expansion valve that air-conditioner is controlled after the compressor for starting air-conditioner is opened
The numerical value of degree.First opening value can be the numerical value in the system that is stored in advance in, it is also possible to be calculated in several ways
Arrive.After aperture to first opening value of the electric expansion valve of control air-conditioner, start timing, the aperture of recorded electronic expansion valve
It is the time of the first opening value.
Step S103, detects first operational factor and the first service condition of compressor.
Specifically, the first operational factor is compressor when timing time is between the first Preset Time and the second Preset Time
Operational factor, the first service condition be timing time between the first Preset Time and the second Preset Time when compressor fortune
Row condition, the second Preset Time runs to the time up to steady operational status for preset compressor.
When timing time is between the first Preset Time and the second Preset Time, according to predetermined period detection compressor
First operational factor and the first service condition.
For example, the first Preset Time is for the 8th minute after the compressor start of air-conditioner, the second Preset Time is air-conditioner
The 15th minute after compressor start.After the compressor start of air-conditioner between the 8th minute to the 15th minute, periodically detection
The operational factor and service condition of compressor.
Step S104, the second opening value is calculated according to the first operational factor and the first service condition.
The pressure detected according to predetermined period during according to timing time between the first Preset Time and the second Preset Time
First operational factor of contracting machine and the first service condition calculate the second opening value.I.e. the second opening value is probably according to predetermined period
It is changed, the first different opening values is calculated according to different the first operational factor and the first service condition.
Step S105, controls the aperture of electric expansion valve to the second opening value.
The aperture of electric expansion valve of air-conditioner is controlled to the second opening value.I.e. according to the first different operational factors and
One service condition adjusts the aperture of electric expansion valve.
The control method of electric expansion valve provided in an embodiment of the present invention, due to compressor reach steady operational status it
Before, operational factor and service condition are detected, determined to electronic expansion according to the operational factor and service condition for detecting
The control aperture of valve so that the aperture of electric expansion valve matches with current operating parameter and current operating condition, it is right to improve
The control accuracy of electric expansion valve, reaches the speed of steady operational status in air-conditioning system so as to improve after compressor start
Degree.Therefore solve in correlation technique because the control accuracy to electric expansion valve is relatively low, cause compressor in air-conditioning system
The slow problem of steady operational status is reached after startup.
Preferably, the accuracy of the second opening value is calculated to be lifted, according to the first operational factor and the first service condition
Calculating the second opening value includes：First object delivery temperature is calculated according to the first operational factor and the first service condition；Detection pressure
The first exhaust temperature of contracting machine, wherein, first exhaust temperature be timing time the first Preset Time and the second Preset Time it
Between when compressor delivery temperature；Judge whether first object delivery temperature is preset with the difference of first exhaust temperature more than first
Difference；And if first object delivery temperature is more than the first preset difference value with the difference of first exhaust temperature, according to the first mesh
The opening value of mathematic interpolation second of mark delivery temperature and first exhaust temperature.
The opening value of magnetic valve is calculated by exhaust gas temperature change amount and with the parameter such as the departure of preset difference value, is improved
Calculate the accuracy of the second opening value.
Alternatively, calculating first object delivery temperature according to the first operational factor and the first service condition includes：By
Two preset algorithms calculate first object delivery temperature, wherein, the second preset algorithm is：Tds_i=(Tds_l-i+Td_i)/2, Tds-iIt is
The first object delivery temperature at the i-th moment, Tds-l-iIt is the transient target delivery temperature at the i-th moment, Td-iIt is the first of the i-th moment
Delivery temperature.Transient target delivery temperature is calculated by following steps：Transient target is calculated by the 3rd preset algorithm to arrange
Temperature degree, wherein, the 3rd preset algorithm is：
Tds_l=a1Te 2+a2Tc 2+a3TeTc+a4Te+a5Tc+a6F2+a7F+a8, TeIt is evaporating temperature, TcIt is condensation temperature, F is
Compressor operating frequency, a1、a2、a3、a4、a5、a6、a7And a8It is constant coefficient, Tds-lIt is transient target delivery temperature.
By associating evaporating temperature, condensation temperature, compressor operating frequency and transient target delivery temperature etc., by calculating
The first opening value is obtained, the accuracy for obtaining first object delivery temperature is improved, the second opening value is calculated so as to reach lifting
Accuracy effect.
Alternatively, after aperture to second opening value of control electric expansion valve, the method also includes：Detection compressor
The 3rd operational factor and the 3rd service condition, wherein, the 3rd operational factor press after the second Preset Time for timing time reaches
The operational factor of contracting machine, the 3rd service condition reaches the service condition of compressor after the second Preset Time for timing time；According to
3rd operational factor and the 3rd service condition calculate the second target exhaust temperature；The second exhaust temperature of compressor is detected, wherein,
Second exhaust temperature reaches the delivery temperature of compressor after the second Preset Time for timing time；Judge the second target exhaust temperature
Whether the difference with second exhaust temperature is more than the second preset difference value；If the second target exhaust temperature and second exhaust temperature
Difference is more than the second preset difference value, according to the second target exhaust temperature and the opening value of mathematic interpolation the 3rd of second exhaust temperature；
And the aperture of control electric expansion valve is to the 3rd opening value.Second mesh is calculated according to the 3rd operational factor and the 3rd service condition
Mark delivery temperature includes：Second target exhaust temperature is calculated by the 4th preset algorithm, wherein, the 4th preset algorithm is：Tds-i
=(Tds_i-1+Tds_l-i)/2, Tds-iIt is second target exhaust temperature at the i-th moment, Tds-i-1It is the first object at the i-th -1 moment
Delivery temperature, Tds-l-iIt is the transient target delivery temperature at the i-th moment.
For example, 72 DEG C of current exhaust gas temperature, 74 DEG C of previous moment delivery temperature, Te=7 DEG C of evaporating temperature, condensation temperature Tc
=42 DEG C, compressor operating frequency F=65Hz transient targets delivery temperature is calculated by formula：
Tds_l=a1Te 2+a2Tc 2+a3TeTc+a4Te+a5Tc+a6F2+a7F+a8
Wherein, a1=0.0002, a2=0.003881, a3=0.00495, a4=-0.77775, a5=0.906131, a6=
0.002237, a7=-0.16945, a8=30.27805, then transient target delivery temperature Tds-l=69.6 DEG C, previous moment is interim
70.5 DEG C of target exhaust temperature, the second target exhaust temperature Tds-i=70 DEG C, it is 2 DEG C to calculate delivery temperature departure, exhaust temperature
Degree variable quantity is -2 DEG C.Then the aperture regulation amount of electric expansion valve is+2 steps.
After compressor operating reaches steady-state operation, by above step, the aperture of electric expansion valve is adjusted, lifted to electricity
The accuracy of sub- expansion valve control.
Fig. 2 be electric expansion valve according to a first embodiment of the present invention control method in air-conditioning system schematic diagram.Such as
Shown in Fig. 2, the air-conditioning system includes：Compressor 101, four-way valve 102, indoor heat exchanger 103, electric expansion valve 104, outdoor are changed
Hot device 105, indoor blower fan 106 and outside blower fan 107.The outdoor ring being provided with outdoor heat exchanger 105 in air-conditioning system
Border temperature-sensitive bag (not indicated in figure) and pipe warming thermometer bulb (not indicated in figure) of outdoor heat exchanger 105, to sensing chamber's outer shroud
The temperature of border temperature and outdoor heat exchanger 105；The indoor environment temperature-sensitive bag being provided with indoor heat exchanger 103 in air-conditioning system
The temperature-sensitive bag (not indicated in figure) of (not indicated in figure) and indoor heat exchanger 103, is used to detect indoor environment temperature and interior
The temperature of heat exchanger 103；Compressor air-discharging side is provided with compressor exhaust temperature temperature-sensitive bag and (is not marked in figure in air-conditioning system
Show), it is used to detect compressor exhaust temperature.
Air Conditioning Cycle is illustrated by taking air-conditioning system refrigerating operaton as an example, the system of the HTHP discharged by compressor 101
Cryogen overheated gas enter outdoor heat exchanger 105, the heat release in outdoor heat exchanger 105, HTHP after four-way valve 102
Refrigerant subcooled liquid, then through the reducing pressure by regulating flow of electric expansion valve 104, the refrigerant two-phase mixture for becoming low-temp low-pressure enters
Enter indoor heat exchanger 103, evaporation of being absorbed heat in side heat exchanger 103 indoors becomes the refrigerant superheat gas of low-temp low-pressure, passes through
Four-way valve 102 enters compression in compressor 101, becomes the refrigerant superheat gas of HTHP, completes a circulation.
Fig. 3 is the flow chart of the control method of electric expansion valve according to a second embodiment of the present invention.Fig. 3 can be as figure
A kind of preferred embodiment of 1 illustrated embodiment.As shown in figure 3, the method is comprised the following steps：
Step S301, starts the compressor of air-conditioner.
Step S301 will not be repeated here with above-mentioned steps S101.
Step S302, judges whether compressor is first upper electricity.
Step S303, if compressor is first upper electricity, detects second operational factor and the second service condition of compressor.
Wherein, the second operational factor is after the compressor for starting air-conditioner, in the electric expansion valve of control air-conditioner
Aperture to the first opening value before compressor operational factor, the second service condition be start air-conditioner compressor it
Afterwards, control air-conditioner electric expansion valve aperture to the first opening value before compressor service condition.
Step S304, the first opening value is calculated according to the second operational factor and the second service condition.
Step S305, if compressor is not first upper electricity, detects second operational factor and the second operation bar of compressor
Part.
Step S306, judges whether to have stored opening value corresponding with the second service condition.
Step S307, if having stored opening value corresponding with the second service condition, opens the second service condition is corresponding
Angle value is used as the first opening value.
After compressor start, if the optimal opening value of the electric expansion valve corresponding with the second service condition that has been stored with,
Then directly using the optimal opening value as the first opening value.
If not storing opening value corresponding with the second service condition, step S304 is jumped to, according to the second operational factor
The first opening value is calculated with the second service condition.
Step S308, controls the aperture of electric expansion valve of air-conditioner to the first opening value, and start timing.
Step S308 will not be repeated here with above-mentioned steps S102.
Step S309, detects first operational factor and the first service condition of compressor, wherein, the first operational factor is meter
When the time between the first Preset Time and the second Preset Time when compressor operational factor, the first service condition be timing when
Between between the first Preset Time and the second Preset Time when compressor service condition.
Step S309 will not be repeated here with above-mentioned steps S103.
Step S310, the second opening value is calculated according to the first operational factor and the first service condition.
Step S310 will not be repeated here with above-mentioned steps S104.
Step S311, controls the aperture of electric expansion valve to the second opening value.
Step S311 will not be repeated here with above-mentioned steps S105.
The control method of electric expansion valve provided in an embodiment of the present invention, due to start air-conditioner compressor after,
Before aperture to first opening value of the electric expansion valve of control air-conditioner, according to judge compressor whether be it is first electric,
To obtain the first opening value by different modes, improve the accuracy and speed for obtaining the first opening value, then arrive in compressor
Up to before steady operational status, operational factor and service condition are detected, according to the operational factor and operation bar that detect
Part determines the control aperture to electric expansion valve so that the aperture of electric expansion valve and current operating parameter and current operating condition
Match, improve the control accuracy to electric expansion valve, so as to improve reached after compressor start in air-conditioning system it is steady
Determine the speed of running status.Therefore solve in correlation technique because the control accuracy to electric expansion valve is relatively low, cause sky
The slow problem of steady operational status is reached in adjusting system after compressor start.
Preferably, calculating the first opening value according to the second operational factor and the second service condition includes：It is default by first
Algorithm calculates the first opening value, wherein, the first preset algorithm is：P=b1Tout+b2Tin+b3F+b4Nout+b5Nin, the second operation bar
Part includes association indoor environment temperature TinWith outdoor environment temperature Tout, the second operational factor include compressor operating frequency F, room
Inner side rotation speed of fan NinWith outside rotation speed of fan Nout, b1、b2、b3、b4And b5It is constant coefficient, P is the first opening value.
By associate indoor environment temperature, outside environment temperature, compressor operating frequency, indoor rotation speed of fan,
Outside rotation speed of fan etc., by being calculated the first opening value, improves the accuracy for obtaining the first opening value.
It should be noted that can be in such as one group computer executable instructions the step of the flow of accompanying drawing is illustrated
Performed in computer system, and, although logical order is shown in flow charts, but in some cases, can be with not
The order being same as herein performs shown or described step.
The embodiment of the present invention additionally provides a kind of control device of electric expansion valve, it is necessary to explanation, present invention implementation
The control device of the electric expansion valve of example can be used for performing the control for electric expansion valve that the embodiment of the present invention is provided
Method.The control device to electric expansion valve provided in an embodiment of the present invention is introduced below.
Fig. 4 is the schematic diagram of the control device of electric expansion valve according to embodiments of the present invention.As shown in figure 4, the device
Including：Start unit 10, the first control unit 20, the first detection unit 30, the first computing unit 40 and the second control unit 50.
Start unit 10, the compressor for starting air-conditioner.
First control unit 20, for control air-conditioner electric expansion valve aperture to the first opening value, and start meter
When.
First detection unit 30, the first operational factor and the first service condition for detecting compressor, wherein, the first fortune
Line parameter is the operational factor of compressor when timing time is between the first Preset Time and the second Preset Time, the first operation bar
Part is the service condition of compressor when timing time is between the first Preset Time and the second Preset Time.
First computing unit 40, for calculating the second opening value according to the first operational factor and the first service condition.
Second control unit 50, for controlling the aperture of electric expansion valve to the second opening value.
The control device of electric expansion valve provided in an embodiment of the present invention, due to by the first detection unit 30 in compressor
Before reaching steady operational status, operational factor and service condition are detected, first computing unit 40 is according to detecting
Operational factor and service condition calculate the control aperture to electric expansion valve so that the aperture of electric expansion valve and current operation ginseng
Number and current operating condition match, and improve the control accuracy to electric expansion valve, are pressed so as to improve in air-conditioning system
Contracting machine reaches the speed of steady operational status after starting.Therefore solve in correlation technique due to the control essence to electric expansion valve
Exactness is relatively low, causes to reach the slow problem of steady operational status in air-conditioning system after compressor start.
Preferably, in the control device of electric expansion valve provided in an embodiment of the present invention, the first computing unit 40 is also wrapped
Include：First computing module, for calculating first object delivery temperature according to the first operational factor and the first service condition；Detection mould
Block, the first exhaust temperature for detecting compressor, wherein, first exhaust temperature is timing time in the first Preset Time and the
The delivery temperature of compressor when between two Preset Times；Judge module, for judging first object delivery temperature and first exhaust
Whether the difference of temperature is more than the first preset difference value；And second computing module, in first object delivery temperature and first
In the case that the difference of delivery temperature is more than the first preset difference value, according to first object delivery temperature and the difference of first exhaust temperature
Value calculates the second opening value.
Preferably, in the control device of electric expansion valve provided in an embodiment of the present invention, the device also includes：Second inspection
Survey unit, the 3rd operational factor and the 3rd service condition for detecting compressor, wherein, the 3rd operational factor is timing time
The operational factor of compressor after the second Preset Time is reached, the 3rd service condition is pressed after reaching the second Preset Time for timing time
The service condition of contracting machine；Second computing unit, for calculating the second target row according to the 3rd operational factor and the 3rd service condition
Temperature degree；3rd detection unit, the second exhaust temperature for detecting compressor, wherein, second exhaust temperature is timing time
Reach the delivery temperature of compressor after the second Preset Time；Judging unit, for judging the second target exhaust temperature and second row
Whether the difference of temperature degree is more than the second preset difference value；3rd computing unit, in the second target exhaust temperature and second row
In the case that the difference of temperature degree is more than the second preset difference value, according to the second target exhaust temperature and the difference of second exhaust temperature
Calculate the 3rd opening value；And the 3rd control unit, for controlling the aperture of electric expansion valve to the 3rd opening value.
According to embodiments of the present invention, a kind of air-conditioner is additionally provided.The air-conditioner includes any one that the present invention is provided
The control device of electric expansion valve.
Obviously, those skilled in the art should be understood that above-mentioned of the invention each module or each step can be with general
Computing device realize that they can be concentrated on single computing device, or be distributed in multiple computing devices and constituted
Network on, alternatively, the program code that they can be can perform with computing device be realized, it is thus possible to they are stored
Performed by computing device in the storage device, or they be fabricated to each integrated circuit modules respectively, or by they
In multiple modules or step single integrated circuit module is fabricated to realize.So, the present invention is not restricted to any specific
Hardware and software is combined.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (12)
1. a kind of control method of electric expansion valve, it is characterised in that including：
Start the compressor of air-conditioner；
The aperture of electric expansion valve of the air-conditioner is controlled to the first opening value, and starts timing；
First operational factor and the first service condition of the compressor are detected, wherein, when first operational factor is timing
Between between the first Preset Time and the second Preset Time when the compressor operational factor, first service condition is institute
The service condition of the compressor, described when stating timing time between first Preset Time and second Preset Time
Second Preset Time is the time that the default compressor operating reaches steady operational status；
Second opening value is calculated according to first operational factor and first service condition；And
Control the aperture of the electric expansion valve to second opening value.
2. method according to claim 1, it is characterised in that after the compressor for starting air-conditioner, it is described in control
Before the aperture of the electric expansion valve of air-conditioner to the first opening value, methods described also includes：
Judge whether the compressor is first upper electricity；
If the compressor is first upper electricity, second operational factor and the second service condition of the compressor are detected, wherein,
Second operational factor is after the compressor for starting the air-conditioner, to control the electric expansion valve of the air-conditioner
Aperture to the first opening value as described before compressor operational factor, second service condition is to start the air-conditioning
After the compressor of device, compressed in aperture to the first opening value as described before of the electric expansion valve for controlling the air-conditioner
The service condition of machine；First opening value is calculated according to second operational factor and second service condition；
If the compressor is not first upper electricity, second operational factor and the second service condition of the compressor are detected, its
In, second operational factor is after the compressor for starting the air-conditioner, to control the electronic expansion of the air-conditioner
The aperture of valve to the first opening value as described before compressor operational factor, second service condition be start it is described
After the compressor of air-conditioner, the aperture of the electric expansion valve of the air-conditioner to the first opening value as described before is being controlled
The service condition of compressor；Judge whether to have stored opening value corresponding with second service condition；If stored and institute
The corresponding opening value of the second service condition is stated, using the corresponding opening value of second service condition as first opening value,
If not storing opening value corresponding with second service condition, according to second operational factor and the second operation bar
Part calculates first opening value.
3. method according to claim 2, it is characterised in that according to second operational factor and the second operation bar
Part calculates first opening value to be included：
First opening value is calculated by the first preset algorithm, wherein, first preset algorithm is：
P=b1Tout+b2Tin+b3F+b4Nout+b5Nin
Second service condition includes association indoor environment temperature TinWith outdoor environment temperature Tout, second operational factor
Including the compressor operating frequency F, indoor rotation speed of fan NinWith outside rotation speed of fan Nout, b1、b2、b3、b4And b5For
Constant coefficient, P is first opening value.
4. method according to claim 1, it is characterised in that according to first operational factor and the first operation bar
Part calculates the second opening value to be included：
First object delivery temperature is calculated according to first operational factor and first service condition；
The first exhaust temperature of the compressor is detected, wherein, the first exhaust temperature is the timing time described the
The delivery temperature of compressor when between one Preset Time and second Preset Time；
Judge the first object delivery temperature with the difference of the first exhaust temperature whether more than the first preset difference value；And
If the first object delivery temperature is more than first preset difference value with the difference of the first exhaust temperature, according to
Second opening value described in the mathematic interpolation of the first object delivery temperature and the first exhaust temperature.
5. method according to claim 4, it is characterised in that according to first operational factor and the first operation bar
Part calculates first object delivery temperature to be included：
The first object delivery temperature is calculated by the second preset algorithm, wherein, second preset algorithm is：
Tds_i=(Tds_l-i+Td_i)/2
Tds-iIt is the first object delivery temperature at the i-th moment, Tds-l-iIt is the transient target delivery temperature at the i-th moment, Td-iIt is i-th
The first exhaust temperature at moment.
6. method according to claim 5, it is characterised in that the transient target delivery temperature is calculated by following steps
Obtain：
The transient target delivery temperature is calculated by the 3rd preset algorithm, wherein, the 3rd preset algorithm is：
Tds_l=a1Te 2+a2Tc 2+a3TeTc+a4Te+a5Tc+a6F2+a7F+a8
TeIt is evaporating temperature, TcIt is condensation temperature, F is the compressor operating frequency, a1、a2、a3、a4、a5、a6、a7And a8For normal
Number system number, Tds-lIt is transient target delivery temperature.
7. method according to claim 1, it is characterised in that controlling the aperture of the electric expansion valve to described second
After opening value, methods described also includes：
The 3rd operational factor and the 3rd service condition of the compressor are detected, wherein, the 3rd operational factor is the meter
When the time reach the operational factor of the compressor after second Preset Time, when the 3rd service condition is the timing
Between reach the service condition of the compressor after second Preset Time；
Second target exhaust temperature is calculated according to the 3rd operational factor and the 3rd service condition；
The second exhaust temperature of the compressor is detected, wherein, the second exhaust temperature is described for the timing time reaches
The delivery temperature of the compressor after second Preset Time；
Judge second target exhaust temperature with the difference of the second exhaust temperature whether more than the second preset difference value；
If second target exhaust temperature is more than second preset difference value with the difference of the second exhaust temperature, according to
The opening value of mathematic interpolation the 3rd of second target exhaust temperature and the second exhaust temperature；And
Control the aperture of the electric expansion valve to the 3rd opening value.
8. method according to claim 7, it is characterised in that according to the 3rd operational factor and the 3rd operation article
Part calculates the second target exhaust temperature to be included：
Second target exhaust temperature is calculated by the 4th preset algorithm, wherein, the 4th preset algorithm is：
Tds-i=(Tds_i-1+Tds_l-i)/2
Tds-iIt is second target exhaust temperature at the i-th moment, Tds-i-1It is the first object delivery temperature at the i-th -1 moment, Tds-l-iIt is
The transient target delivery temperature at the i-th moment.
9. a kind of control device of electric expansion valve, it is characterised in that including：
Start unit, the compressor for starting air-conditioner；
First control unit, for control the air-conditioner electric expansion valve aperture to the first opening value, and start timing；
First detection unit, the first operational factor and the first service condition for detecting the compressor, wherein, described first
Operational factor is the operational factor of compressor when timing time is between the first Preset Time and the second Preset Time, described
First service condition is the compression when timing time is between first Preset Time and second Preset Time
The service condition of machine, second Preset Time is the time that the default compressor operating reaches steady operational status；
First computing unit, for calculating the second opening value according to first operational factor and first service condition；With
And
Second control unit, for controlling the aperture of the electric expansion valve to second opening value.
10. device according to claim 9, it is characterised in that first computing unit includes：
First computing module, for calculating first object exhaust temperature according to first operational factor and first service condition
Degree；
Detection module, the first exhaust temperature for detecting the compressor, wherein, the first exhaust temperature is the timing
The delivery temperature of compressor when time is between first Preset Time and second Preset Time；
Judge module, for judging the first object delivery temperature with the difference of the first exhaust temperature whether more than first
Preset difference value；And
Second computing module, for the difference in the first object delivery temperature and the first exhaust temperature more than described the
In the case of one preset difference value, according to the mathematic interpolation of the first object delivery temperature and the first exhaust temperature
Two opening values.
11. devices according to claim 9, it is characterised in that described device also includes：
Second detection unit, the 3rd operational factor and the 3rd service condition for detecting the compressor, wherein, the described 3rd
Operational factor is the operational factor that the timing time reaches the compressor after second Preset Time, the 3rd operation
Condition is the service condition that the timing time reaches the compressor after second Preset Time；
Second computing unit, for calculating the second target exhaust temperature according to the 3rd operational factor and the 3rd service condition
Degree；
3rd detection unit, the second exhaust temperature for detecting the compressor, wherein, the second exhaust temperature is described
Timing time reaches the delivery temperature of the compressor after second Preset Time；
Judging unit, for judging second target exhaust temperature with the difference of the second exhaust temperature whether more than second
Preset difference value；
3rd computing unit, for the difference in second target exhaust temperature and the second exhaust temperature more than described the
In the case of two preset difference values, opened with the mathematic interpolation the 3rd of the second exhaust temperature according to second target exhaust temperature
Angle value；And
3rd control unit, for controlling the aperture of the electric expansion valve to the 3rd opening value.
12. a kind of air-conditioners, it is characterised in that the air-conditioner is included any one of claim 9 to claim 11
Electric expansion valve control device.
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| CN105352239B (en) * | 2015-11-02 | 2018-07-31 | 青岛海尔空调器有限总公司 | The control method of air conditioner electronic expansion valve |
| CN105299974B (en) * | 2015-11-02 | 2018-07-13 | 青岛海尔空调器有限总公司 | A kind of control method of air conditioner electronic expansion valve |
| CN105485869B (en) * | 2016-01-04 | 2018-06-19 | 广东美的暖通设备有限公司 | Electric expansion valve fault detection method and device |
| CN105864972B (en) * | 2016-04-13 | 2019-01-11 | 广东美芝制冷设备有限公司 | Frequency-conversion air-conditioning system and its control method |
| CN106196507A (en) * | 2016-08-19 | 2016-12-07 | 芜湖美智空调设备有限公司 | Air-conditioner and the control method of air-conditioner |
| CN106403428A (en) * | 2016-10-20 | 2017-02-15 | 珠海格力电器股份有限公司 | Control method, device and system of electronic expansion valve and air conditioner |
| CN106568165B (en) * | 2016-11-02 | 2019-05-17 | 广东美的暖通设备有限公司 | A kind of adjusting method of air conditioner electronic expansion valve, system and air conditioner |
| CN106895621B (en) * | 2017-02-09 | 2020-02-04 | 青岛海尔空调器有限总公司 | Air conditioner and control method thereof |
| CN110500746B (en) * | 2018-05-18 | 2021-05-25 | 青岛海尔空调器有限总公司 | Method for controlling opening of electronic expansion valve of air conditioner |
| CN109631279B (en) * | 2018-11-19 | 2021-05-25 | 青岛海尔空调电子有限公司 | Multi-split air conditioning system and starting control method thereof |
| CN110986333B (en) * | 2019-12-26 | 2021-12-21 | 广东美的制冷设备有限公司 | Control method and device of air conditioner, air conditioner and electronic equipment |
| CN112033055B (en) * | 2020-08-10 | 2022-03-08 | 广东纽恩泰新能源科技发展有限公司 | Pre-protection control method for temperature of heating coil |
| CN115352246A (en) * | 2022-08-23 | 2022-11-18 | 重庆长安汽车股份有限公司 | Electronic expansion valve opening determining method, control method, system, device and medium |
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