CN105864972A - Variable frequency air conditioner system and control methods thereof - Google Patents
Variable frequency air conditioner system and control methods thereof Download PDFInfo
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- CN105864972A CN105864972A CN201610231631.3A CN201610231631A CN105864972A CN 105864972 A CN105864972 A CN 105864972A CN 201610231631 A CN201610231631 A CN 201610231631A CN 105864972 A CN105864972 A CN 105864972A
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- Prior art keywords
- expansion valve
- electric expansion
- valve
- gear
- frequency
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000005057 refrigeration Methods 0.000 claims abstract description 91
- 238000010438 heat treatment Methods 0.000 claims abstract description 49
- 238000004378 air conditioning Methods 0.000 claims description 60
- 238000006243 chemical reaction Methods 0.000 claims description 58
- 238000001514 detection method Methods 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 239000003507 refrigerant Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000002826 coolant Substances 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- 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
- 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
- F24F11/85—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 variable-flow pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- 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
Landscapes
- 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)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a variable frequency air conditioner system and control methods thereof. The variable frequency air conditioner system comprises a compressor, a first-stage electronic expansion valve and a second-stage electronic expansion valve located behind the first-stage electronic expansion valve in the flowing direction of coolants. In the refrigerating operation, the control method comprises the following steps that the outdoor environment temperature Toutdoor and the indoor environment temperature Tindoor are detected; the refrigeration temperature difference delta Tcool=Toutdoor-Tindoor is calculated according to the Toutdoor and the Tindoor; the rotation speed M of the compressor is detected; and the opening degree of a refrigerating valve of the first-stage electronic expansion valve is controlled according to the delta Tcool and the rotation speed M. In the heating operation, the control method comprises the following steps that the outdoor environment temperature Toutdoor and the indoor environment temperature Tindoor are detected; the heating temperature difference delta Theat=Toutdoor-Tindoor is calculated according to the Toutdoor and the Tindoor; the rotation speed N of the compressor is detected; and the opening degree of a heating valve of the first-stage electronic expansion valve is controlled according to the delta Theat and the rotation speed N. According to the control methods of the variable frequency air conditioner system, control is easy.
Description
Technical field
The present invention relates to air-conditioning technical field, especially relate to a kind of frequency-conversion air-conditioning system and control method thereof.
Background technology
In correlation technique, for using the frequency-conversion air-conditioning system of coolant injection formula compressor, the of coolant injection formula compressor
One cylinder absorbs the refrigerant of flash-pot, and the second cylinder then absorbs the refrigerant from gas-liquid separator, if used
When two expansion valves are controlled the first order throttling electric expansion valve control can extremely complex and to the first order throttle
Need during electronic expansion valve controls to increase sensor, for example, it is desired to detection flasher temperature or the sensor of pressure, the
Two temperature cylinders or the sensor etc. of pressure.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art.To this end, one object of the present invention exists
In the control method of a kind of frequency-conversion air-conditioning system of proposition, control simple.
Further object is that a kind of frequency-conversion air-conditioning system using above-mentioned control method of proposition.
The control method of frequency-conversion air-conditioning system according to a first aspect of the present invention, described frequency-conversion air-conditioning system include compressor,
First order electric expansion valve, flow direction second level electric expansion valve behind along refrigerant, when described convertible frequency air-conditioner
When cooling system runs, described control method comprises the following steps: detection outdoor environment temperature ToutdoorWith indoor environment temperature
Degree Tindoor；According to Toutdoor、TindoorCalculate refrigeration temperature difference △ Tcool=Toutdoor-Tindoor；Detect the rotating speed M of described compressor；
According to described refrigeration temperature difference △ TcoolWith the refrigeration that the rotating speed M of described compressor controls described first order electric expansion valve
Valve opening；
When described frequency-conversion air-conditioning system heating operation, described control method comprises the following steps: detection outdoor environment temperature
ToutdoorWith indoor environment temperature Tindoor；According to Toutdoor、TindoorCalculating heats temperature difference △ Theat=Tindoor-Toutdoor；Detection
The rotating speed N of described compressor；Temperature difference △ T is heated according to describedheatDescribed first is controlled with the rotating speed N of described compressor
Level electric expansion valve heat valve opening.
The control method of the frequency-conversion air-conditioning system according to the present invention, by using above-mentioned control method to frequency-conversion air-conditioning system
It is controlled, controls simple.
According to some embodiments of the present invention, the gear C of the refrigeration valve aperture of described first order electric expansion valve meets:
C=A+B-1, wherein, described A is described refrigeration temperature difference △ TcoolThe gear of the corresponding refrigeration temperature difference, described B is described
The gear of refrigeration compressor rotating speed corresponding for rotating speed M, described A, B, C be positive integer, and the described refrigeration temperature difference
The gear number of gear number and described refrigeration compressor rotating speed is all higher than equal to 2, the system of described first order electric expansion valve
Low temperature valve aperture is corresponding to the gear C of the refrigeration valve aperture of described first order electric expansion valve.
Specifically, the gear A of the described refrigeration temperature difference specifically includes: as △ TcoolDuring ＜-10 DEG C, A=1；As-10 DEG C≤△
TcoolDuring ＜-5 DEG C, A=2；As-5 DEG C≤△ TcoolDuring ＜ 5 DEG C, A=3；As △ TcoolWhen >=5 DEG C, A=4.
Specifically, the gear B of described refrigeration compressor rotating speed specifically includes: as M >=70Hz, B=1；As M ＜ 70Hz
Time, B=2.
Specifically, the refrigeration valve aperture of described first order electric expansion valve is V1, the refrigeration of described first order electric expansion valve
The gear C of valve opening specifically includes: as C=1, described V1=100 steps；As C=2, described V1=150 steps；When
During C=3, described V1=200 steps；As C=4, described V1=300 steps；As C=5, described V1=400 steps.
According to some embodiments of the present invention, the gear F heating valve opening of described first order electric expansion valve meets:
F=D+E-1, wherein, described D is for heating temperature difference △ TheatThe corresponding gear heating the temperature difference, described E is described rotating speed
What N was corresponding heats the gear of compressor rotary speed, and described D, E, F are positive integer, and described in heat the gear of the temperature difference
Number and the described gear number heating compressor rotary speed are all higher than equal to 2, and the valve that heats of described first order electric expansion valve is opened
Spend the gear F heating valve opening corresponding to described first order electric expansion valve.
Specifically, the gear D heating the temperature difference described in specifically includes: as △ TheatDuring ＜-15 DEG C, D=1；As-15 DEG C≤△
TheatDuring ＜-8 DEG C, D=2；As-8 DEG C≤△ TheatDuring ＜ 8 DEG C, D=3；As △ TheatWhen >=8 DEG C, D=4.
Specifically, described in heat the gear E of compressor rotary speed and specifically include: as N >=60Hz, E=1；As N ＜ 60Hz
Time, E=2.
Specifically, the valve opening that heats of described first order electric expansion valve is V2, heating of described first order electric expansion valve
The gear F of valve opening specifically includes: as F=1, described V2=80 steps；As F=2, described V2=120 steps；When
During F=3, described V2=180 steps；As F=4, described V2=250 steps；As F=5, described V2=300 steps.
According to some embodiments of the present invention, described outdoor environment temperature is the temperature of outdoor heat exchanger.
Alternatively, the temperature of described outdoor heat exchanger is the saturated temperature being converted into by the saturation pressure of described outdoor heat exchanger
Degree.
According to some embodiments of the present invention, described indoor environment temperature is the temperature of indoor heat exchanger.
Alternatively, the temperature of described indoor heat exchanger is the saturated temperature being converted into by the saturation pressure of described indoor heat exchanger
Degree.
The control method using the frequency-conversion air-conditioning system according to the above-mentioned first aspect of the present invention according to a second aspect of the present invention
Frequency-conversion air-conditioning system, including: compressor, described compressor includes the first cylinder and the second cylinder, described first gas
Cylinder has the first air entry, and described second cylinder has the second air entry, and described compressor has exhaust outlet；Control valve,
Described control valve includes that the first valve port to the 4th valve port, described first valve port are connected with described exhaust outlet, the 3rd valve port with
First air entry is connected；First Heat Exchanger, one end of described First Heat Exchanger is connected with described 4th valve port；Second changes
Hot device, one end of described second heat exchanger is connected with the second valve port；Gas-liquid separator, described gas-liquid separator has
One connector, the second connector and outlet, described outlet is connected with described second air entry；First electric expansion valve,
One end of described first electric expansion valve is connected with the other end of described First Heat Exchanger, described first electric expansion valve
The other end is connected with described first connector；And second electric expansion valve, one end of described second electric expansion valve with
The other end of described second heat exchanger is connected, and the other end of described second electric expansion valve is connected with described second connector,
When described frequency-conversion air-conditioning system refrigerating operaton, described first electric expansion valve is described first order electric expansion valve and institute
Stating the second electric expansion valve is described second level electric expansion valve, when described frequency-conversion air-conditioning system heating operation, described
Second electric expansion valve is described first order electric expansion valve and described first electric expansion valve is that described second level electronics is swollen
Swollen valve.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Substantially, or by the practice of the present invention recognize.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage will become bright from combining the accompanying drawings below description to embodiment
Aobvious and easy to understand, wherein:
Fig. 1 is schematic diagram during frequency-conversion air-conditioning system refrigerating operaton according to embodiments of the present invention；
Fig. 2 is schematic diagram during frequency-conversion air-conditioning system heating operation according to embodiments of the present invention.
Reference:
100: frequency-conversion air-conditioning system；
1: compressor；11: the first air entries；12: the second air entries；13: exhaust outlet；
2: control valve；21: the first valve ports；22: the second valve ports；23: the three valve ports；24: the four valve ports；
3: First Heat Exchanger；4: the second heat exchangers；
5: gas-liquid separator；6: the first electric expansion valves；7: the second electric expansion valves.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish phase
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to
The embodiment that accompanying drawing describes is exemplary, is only used for explaining the present invention, and is not considered as limiting the invention.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ",
On " ", D score, "left", "right", " vertically ", " level ", " interior ", the instruction such as " outward "
Orientation or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplification
Describe rather than indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration
And operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or imply relatively heavy
The property wanted or the implicit quantity indicating indicated technical characteristic.Thus, " first ", the spy of " second " are defined
Levy and can express or implicitly include one or more this feature.In describing the invention, unless otherwise saying
Bright, " multiple " are meant that two or more.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " install ",
" be connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect,
Or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible in by
Between medium be indirectly connected to, can be the connection of two element internals.For the ordinary skill in the art, may be used
Above-mentioned term concrete meaning in the present invention is understood with concrete condition.
Control method below with reference to Fig. 1 and Fig. 2 description frequency-conversion air-conditioning system 100 according to embodiments of the present invention.
As depicted in figs. 1 and 2, the control method of the frequency-conversion air-conditioning system 100 of embodiment according to a first aspect of the present invention,
Including freezing and heating the two kinds of control methods run under both of which individually below.
Wherein, frequency-conversion air-conditioning system 100 includes that compressor 1, first order electric expansion valve, flow direction along refrigerant exist
Thereafter second level electric expansion valve.Here, " first order electric expansion valve ", " second level electric expansion valve " can
To be interpreted as: no matter frequency-conversion air-conditioning system 100 refrigerating operaton or heating operation, circulation in frequency-conversion air-conditioning system 100
The refrigerant of flowing the most first flows through first order electric expansion valve, passes through second level electric expansion valve.
Specifically, when frequency-conversion air-conditioning system 100 refrigerating operaton, the control method of frequency-conversion air-conditioning system 100 include with
Lower step:
Detection outdoor environment temperature ToutdoorWith indoor environment temperature Tindoor；
According to Toutdoor、TindoorCalculate refrigeration temperature difference △ Tcool=Toutdoor-Tindoor；
The rotating speed M of detection compressor 1；
According to above-mentioned refrigeration temperature difference △ TcoolThe refrigeration valve controlling first order electric expansion valve with the rotating speed M of compressor 1 is opened
Degree.
When frequency-conversion air-conditioning system 100 heating operation, the control method of frequency-conversion air-conditioning system 100 comprises the following steps:
Detection outdoor environment temperature ToutdoorWith indoor environment temperature Tindoor；
According to Toutdoor、TindoorCalculating heats temperature difference △ Theat=Tindoor-Toutdoor；
The rotating speed N of detection compressor 1；
Temperature difference △ T is heated according to above-mentionedheatThe valve that heats controlling first order electric expansion valve with the rotating speed N of compressor 1 is opened
Degree.
Under refrigeration or heating mode, second level electric expansion valve can automatically control according to present mode.Such as,
Second level electric expansion valve can automatically control according to the evaporator superheat of frequency-conversion air-conditioning system 100, i.e. liquid
Gaseous state is the most all flashed to when refrigerant flows through the outlet of evaporimeter.It is, of course, also possible to carry out according to suction superheat etc.
Control.
The control method of frequency-conversion air-conditioning system 100 according to embodiments of the present invention, by using above-mentioned control method to change
Frequently air-conditioning system 100 is controlled, and controls simple.
According to some embodiments of the present invention, the gear C of the refrigeration valve aperture of first order electric expansion valve meets:
C=A+B-1
Wherein, A is refrigeration temperature difference △ TcoolThe gear of the corresponding refrigeration temperature difference, B is that the rotating speed M of compressor 1 is corresponding
The gear of refrigeration compressor 1 rotating speed, A, B, C be positive integer, and the gear number of the refrigeration temperature difference and refrigeration compressor
The gear number of 1 rotating speed is all higher than equal to 2, and now the refrigeration valve aperture of first order electric expansion valve is corresponding to first order electricity
The gear C of the refrigeration valve aperture of sub-expansion valve.
Specifically, the gear A of the actual refrigeration temperature difference needs the refrigeration temperature difference △ T obtained according to Practical CalculationcoolDetermine,
For example, it is possible to pre-set the refrigeration temperature difference to have acoolIndividual gear, is followed successively by the 1st grade of refrigeration temperature difference the most respectively,
The 2nd grade of refrigeration temperature difference ..., acoolThe shelves refrigeration temperature difference.Similarly, the gear B of actual refrigeration compressor 1 rotating speed
Can also determine according to actual speed M of the compressor 1 detected, such as, pre-set compressor 1 rotating speed altogether
There is bcoolIndividual gear, be followed successively by the most respectively the 1st grade refrigeration rotating speed, the 2nd grade refrigeration rotating speed ..., bcool
Shelves refrigeration rotating speed.
The refrigeration valve aperture of first order electric expansion valve can be pre-arranged ccoolIndividual gear, valve opening is distinguished from small to large
It is followed successively by the 1st grade of refrigeration valve aperture, the 2nd grade of refrigeration valve aperture ..., ccoolShelves refrigeration valve aperture.The first order
The refrigeration valve aperture that each gear of electric expansion valve is corresponding can be debugged in advance according to concrete frequency-conversion air-conditioning system 100
Go out, and ccool=acool+bcool-1。
The gear C of the refrigeration valve aperture of first order electric expansion valve can be according to the refrigeration temperature difference △ T detectedcoolAnd compression
Machine 1 rotating speed N determines, as the refrigeration temperature difference △ T detectedcoolCorresponding A shelves and the compressor 1 rotating speed M detected
During corresponding B shelves, then the gear C=A+B-1 of the refrigeration valve aperture of first order electric expansion valve, thus first order electronics
The corresponding C shelves refrigeration valve aperture of the valve opening of expansion valve.
Such as, the gear A of the refrigeration temperature difference can specifically include:
As △ TcoolDuring ＜-10 DEG C, A=1；
As-10 DEG C≤△ TcoolDuring ＜-5 DEG C, A=2；
As-5 DEG C≤△ TcoolDuring ＜ 5 DEG C, A=3；
As △ TcoolWhen >=5 DEG C, A=4.
It is to say, when according to the T detectedoutdoor、TindoorCalculated refrigeration temperature difference △ TcoolDuring ＜-10 DEG C, system
The gear at cold temperature difference place is the 1st grade；As the refrigeration temperature difference-10 DEG C≤△ TcoolDuring ＜-5 DEG C, the shelves at refrigeration temperature difference place
Position is the 2nd grade；As the refrigeration temperature difference-5 DEG C≤△ TcoolDuring ＜ 5 DEG C, the gear at refrigeration temperature difference place is the 3rd grade；Work as system
Cold temperature difference △ TcoolWhen >=5 DEG C, the gear at refrigeration temperature difference place is the 4th grade.Wherein, Toutdoor、TindoorCan respectively by
Outdoor temperature sensor and indoor temperature transmitter detection obtain.
The gear B of refrigeration compressor 1 rotating speed can specifically include:
As M >=70Hz, B=1；
As M ＜ 70Hz, B=2.
It is to say, as the rotating speed M >=70Hz of the compressor 1 detected, the gear at refrigeration compressor 1 rotating speed place
It it is the 1st grade；As the rotating speed M ＜ 70Hz of the compressor 1 detected, the gear at refrigeration compressor 1 rotating speed place is
2nd grade.
The refrigeration valve aperture of first order electric expansion valve is V1, the gear C of the refrigeration valve aperture of first order electric expansion valve
Specifically include:
As C=1, V1=100 steps；
As C=2, V1=150 steps；
As C=3, V1=200 steps；
As C=4, V1=300 steps；
As C=5, V1=400 steps.
It is to say, valve opening V of first order electric expansion valve corresponding to the 1st grade of refrigeration valve aperture1It is 100 steps, the 2nd
Valve opening V of the first order electric expansion valve that shelves refrigeration valve aperture is corresponding1Being 150 steps, the 3rd grade of refrigeration valve aperture is corresponding
Valve opening V of first order electric expansion valve1It is 200 steps, the first order electronic expansion that the 4th grade of refrigeration valve aperture is corresponding
Valve opening V of valve1It is 300 steps, valve opening V of the first order electric expansion valve that the 5th grade of refrigeration valve aperture is corresponding1It is 400
Step.
A specific embodiment according to the present invention, in the case of frequency-conversion air-conditioning system 100 refrigerating operaton, when refrigeration temperature
Difference △ TcoolCorresponding 2nd grade and detect corresponding 1st grade of compressor 1 rotating speed M time, then first order electric expansion valve
Refrigeration valve aperture gear C=2+1-1=2, thus the valve opening of first order electric expansion valve is opened corresponding to the 2nd grade of refrigeration valve
Degree, i.e. valve opening V of first order electric expansion valve1It is 150 steps.
As refrigeration temperature difference △ TcoolCorresponding 3rd grade and detect corresponding 1st grade of compressor 1 rotating speed M time, then the first order
The refrigeration valve aperture gear C=3+1-1=3 of electric expansion valve, then the valve opening of first order electric expansion valve corresponds to the 3rd
Shelves refrigeration valve aperture, i.e. valve opening V of first order electric expansion valve1It is 200 steps.
As refrigeration temperature difference △ TcoolCorresponding 4th grade and detect corresponding 1st grade of compressor 1 rotating speed M time, then the first order
The refrigeration valve aperture gear C=4+1-1=4 of electric expansion valve, then the valve opening of first order electric expansion valve corresponds to the 4th
Shelves refrigeration valve aperture, then valve opening V of first order electric expansion valve1It is 300 steps.
When described refrigeration temperature difference △ T being detectedcoolCorresponding 4th grade and corresponding 2nd grade of described compressor 1 rotating speed M detected
Time, the refrigeration valve aperture gear C=4+2-1=5 of the most described first order electric expansion valve, the most described first order electronic expansion
The valve opening of valve corresponds to the 5th grade of refrigeration valve aperture, then valve opening V of first order electric expansion valve1It is 400 steps.
According to some embodiments of the present invention, the gear F heating valve opening of first order electric expansion valve meets:
F=D+E-1
Wherein, D is the gear heating the temperature difference, and E is the gear heating compressor 1 rotating speed, and D, E, F are positive integer,
And the gear number heating the temperature difference is all higher than equal to 2 with the gear number heating compressor 1 rotating speed, first order electronic expansion
The valve opening that heats of valve corresponds to the gear F heating valve opening of first order electric expansion valve.
Specifically, the actual gear D heating the temperature difference needs to heat temperature difference △ T according to what Practical Calculation obtainedheatDetermine,
Heat the temperature difference have a for example, it is possible to pre-setheatIndividual gear, is followed successively by the 1st grade the most respectively and heats the temperature difference,
2nd grade heats the temperature difference ..., aheatShelves heat the temperature difference.Similarly, the gear E of actual refrigeration compressor 1 rotating speed
Can also determine according to actual speed N of the compressor 1 detected, such as, pre-set compressor 1 rotating speed altogether
There is bheatIndividual gear, is followed successively by the 1st grade the most respectively and heats rotating speed, and the 2nd grade heats rotating speed ..., bheat
Shelves heat rotating speed.
The refrigeration valve aperture of first order electric expansion valve can be pre-arranged cheatIndividual gear, valve opening is distinguished from small to large
Being followed successively by the 1st grade and heat valve opening, the 2nd grade of valve heats aperture ..., cheatShelves heat valve opening.The first order
The valve opening that heats that each gear of electric expansion valve is corresponding is debugged out in advance according to concrete frequency-conversion air-conditioning system 100,
And cheat=aheat+bheat-1。
The gear F heating valve opening of first order electric expansion valve can heat temperature difference △ T according to detectheatAnd compression
Machine 1 rotating speed N determines, heats temperature difference △ T when detectheatCorresponding D shelves and compressor 1 rotating speed N pair detected
When answering E shelves, then the gear F=D+E-1 heating valve opening of first order electric expansion valve, thus first order electronics is swollen
The corresponding F shelves of the valve opening of swollen valve heat valve opening.
Such as, the gear D heating the temperature difference specifically includes:
As △ TheatDuring ＜-15 DEG C, D=1；
As-15 DEG C≤△ TheatDuring ＜-8 DEG C, D=2；
As-8 DEG C≤△ TheatDuring ＜ 8 DEG C, D=3；
As △ TheatWhen >=8 DEG C, D=4.
It is to say, when according to the T detectedoutdoor、TindoorCalculated heat temperature difference △ TheatDuring ＜-15 DEG C, system
The gear at hot temperature difference place is the 1st grade；When heating the temperature difference-15 DEG C≤△ TheatDuring ＜-8 DEG C, heat the shelves at temperature difference place
Position is the 2nd grade；When heating the temperature difference-8 DEG C≤△ TheatDuring ＜ 8 DEG C, the gear heating temperature difference place is the 3rd grade；Work as system
Hot temperature difference △ TheatWhen >=8 DEG C, the gear heating temperature difference place is the 4th grade.
According to some embodiments of the present invention, the gear E heating compressor 1 rotating speed specifically includes:
As N >=60Hz, E=1；
As N ＜ 60Hz, E=2.
It is to say, as the rotating speed N >=60Hz of the compressor 1 detected, heat the gear at compressor 1 rotating speed place
It it is the 1st grade；As the rotating speed N ＜ 60Hz of the compressor 1 detected, the gear heating compressor 1 rotating speed place is
2nd grade.
The valve opening that heats of first order electric expansion valve is V2, the gear F heating valve opening of first order electric expansion valve
Specifically include:
As F=1, V2=80 steps；
As F=2, V2=120 steps；
As F=3, V2=180 steps；
As F=4, V2=250 steps；
As F=5, V2=300 steps.
It is to say, the 1st grade heat first order electric expansion valve corresponding to valve opening heat valve opening V2It is 80 steps,
2nd grade heat first order electric expansion valve corresponding to valve opening heat valve opening V2Being 120 steps, the 3rd grade heats valve
The first order electric expansion valve that aperture is corresponding heat valve opening V2It is 180 steps, the 4th grade of heat that valve opening is corresponding the th
One-level electric expansion valve heat valve opening V2Being 250 steps, the 5th grade heats the first order electronic expansion that valve opening is corresponding
Valve heat valve opening V2It is 300 steps.
A specific embodiment according to the present invention, in the case of frequency-conversion air-conditioning system 100 heating operation, when heating temperature
Difference △ TheatCorresponding 1st grade and detect corresponding 1st grade of compressor 1 rotating speed N time, then first order electric expansion valve
Heat valve opening gear F=1+1-1=1, thus the valve opening that heats of first order electric expansion valve heats corresponding to the 1st grade
Valve opening, i.e. first order electric expansion valve heat valve opening V2It is 80 steps.
When heating temperature difference △ TheatCorresponding 2nd grade and detect corresponding 1st grade of compressor 1 rotating speed N time, then the first order
Electric expansion valve heat valve opening gear F=2+1-1=2, thus first order electric expansion valve to heat valve opening corresponding
Heat valve opening in the 2nd grade, i.e. first order electric expansion valve heat valve opening V2It is 120 steps.
When heating temperature difference △ TheatCorresponding 3rd grade and detect corresponding 1st grade of compressor 1 rotating speed N time, then the first order
Electric expansion valve heat valve opening gear F=3+1-1=3, thus first order electric expansion valve to heat valve opening corresponding
Heat valve opening in the 3rd grade, i.e. first order electric expansion valve heat valve opening V2It is 180 steps.
When heating temperature difference △ TheatCorresponding 4th grade and detect corresponding 1st grade of compressor 1 rotating speed N time, then the first order
Electric expansion valve heat valve opening gear F=4+1-1=4, thus first order electric expansion valve to heat valve opening corresponding
Heat valve opening in the 4th grade, i.e. first order electric expansion valve heat valve opening V2It is 250 steps.
When heating temperature difference △ TheatCorrespondence the 4th grade and corresponding 2nd grade of the compressor 1 rotating speed N detected, then first order electricity
Sub-expansion valve heat valve opening gear F=4+2-1=5, thus the valve opening that heats of first order electric expansion valve corresponds to
5th grade heats valve opening, i.e. first order electric expansion valve heat valve opening V2It is 300 steps.
According to some embodiments of the present invention, outdoor environment temperature can be the temperature of outdoor heat exchanger, and such as, outdoor is changed
The temperature of hot device is the saturation temperature being converted into by the saturation pressure of outdoor heat exchanger, but is not limited to this.
According to some embodiments of the present invention, indoor environment temperature can be the temperature of indoor heat exchanger, and such as, indoor are changed
The temperature of hot device is the saturation temperature being converted into by the saturation pressure of indoor heat exchanger, but is not limited to this.
As depicted in figs. 1 and 2, the frequency-conversion air-conditioning system 100 of embodiment according to a second aspect of the present invention, including compressor
1, control valve 2, First Heat Exchanger 3 (i.e. outdoor heat exchanger), the second heat exchanger 4 (i.e. indoor heat exchanger), gas-liquid
Separator the 5, first electric expansion valve 6 and the second electric expansion valve 7.Wherein, frequency-conversion air-conditioning system 100 can be adopted
It is controlled with according to the control method of the present invention above-mentioned first aspect embodiment.
Seeing figures.1.and.2, compressor 1 can include the first cylinder and the second cylinder, and the first cylinder has the first air-breathing
Mouth 11, the second cylinder has the second air entry 12, and compressor 1 has exhaust outlet 13.Control valve 2 includes the first valve port
21, the first valve port the 21, the 3rd valve port 23 and the 4th valve port 24, the first valve port 21 is connected with exhaust outlet 13, and the 3rd
Valve port 23 is connected with the first air entry 11.One end (such as, the left end in Fig. 1) and the 4th of First Heat Exchanger 3
Valve port 24 is connected.One end (such as, the left end in Fig. 1) of second heat exchanger 4 is connected with the second valve port 22.Gas
Liquid/gas separator 5 has the first connector, the second connector and outlet, and outlet is connected with the second air entry 12.First electricity
One end (such as, the upper end in Fig. 1) of sub-expansion valve 6 and the other end of First Heat Exchanger 3 are (such as, in Fig. 1
Right-hand member) be connected, the other end (such as, the lower end in Fig. 1) and the first connector phase of the first electric expansion valve 6
Even.One end (such as, the left end in Fig. 1) of second electric expansion valve 7 and the other end (example of the second heat exchanger 4
Such as, the right-hand member in Fig. 1) it is connected, the other end (such as, the right-hand member in Fig. 1) of the second electric expansion valve 7 and the
Two connectors are connected.Alternatively, control valve 2 is cross valve, but is not limited to this.
When frequency-conversion air-conditioning system 100 refrigerating operaton, the first electric expansion valve 6 is first order electric expansion valve and second
Electric expansion valve 7 is second level electric expansion valve；When frequency-conversion air-conditioning system 100 heating operation, the second electronic expansion
Valve 7 is first order electric expansion valve and the first electric expansion valve 6 is second level electric expansion valve.
Frequency-conversion air-conditioning system 100 according to embodiments of the present invention, by using above-mentioned control method, it is possible to use frequency conversion
The existing indoor temperature transmitter of air-conditioning system 100, outdoor temperature sensor and compressor 1 rotating speed that detects are to
One-level electric expansion valve is controlled, without arranging detection flasher temperature or the sensor of pressure, the second cylinder temperature
Degree or the sensor etc. of pressure, control simple, and, the control of second level electric expansion valve still can be according to existing
Technology (as controlled evaporator superheat, suction superheat etc.) is controlled, and easily promotes.
Other of frequency-conversion air-conditioning system 100 according to embodiments of the present invention constitute and operate for ordinary skill
It is all known for personnel, is not detailed herein.
In the description of this specification, reference term " embodiment ", " some embodiments ", " illustrative examples ",
It is concrete that the description of " example ", " concrete example " or " some examples " etc. means to combine this embodiment or example describes
Feature, structure, material or feature are contained at least one embodiment or the example of the present invention.In this manual, right
The schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example.And, the specific features of description, structure,
Material or feature can combine in any one or more embodiments or example in an appropriate manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: do not taking off
In the case of the principles and objective of the present invention, these embodiments can be carried out multiple change, revise, replace and modification,
The scope of the present invention is limited by claim and equivalent thereof.
Claims (14)
1. the control method of a frequency-conversion air-conditioning system, it is characterised in that described frequency-conversion air-conditioning system include compressor,
First order electric expansion valve, flow direction second level electric expansion valve behind along refrigerant,
When described frequency-conversion air-conditioning system refrigerating operaton, described control method comprises the following steps:
Detection outdoor environment temperature ToutdoorWith indoor environment temperature Tindoor；
According to Toutdoor、TindoorCalculate refrigeration temperature difference △ Tcool=Toutdoor-Tindoor；
Detect the rotating speed M of described compressor；
According to described refrigeration temperature difference △ TcoolWith the system that the rotating speed M of described compressor controls described first order electric expansion valve
Low temperature valve aperture；
When described frequency-conversion air-conditioning system heating operation, described control method comprises the following steps:
Detection outdoor environment temperature ToutdoorWith indoor environment temperature Tindoor；
According to Toutdoor、TindoorCalculating heats temperature difference △ Theat=Tindoor-Toutdoor；
Detect the rotating speed N of described compressor；
Temperature difference △ T is heated according to describedheatWith the system that the rotating speed N of described compressor controls described first order electric expansion valve
Thermal valve aperture.
The control method of frequency-conversion air-conditioning system the most according to claim 1, it is characterised in that described first order electricity
The gear C of the refrigeration valve aperture of sub-expansion valve meets:
C=A+B-1
Wherein, described A is described refrigeration temperature difference △ TcoolThe gear of the corresponding refrigeration temperature difference, described B is described rotating speed M
The gear of corresponding refrigeration compressor rotating speed, described A, B, C are positive integer, and the gear of the described refrigeration temperature difference
The gear number of number and described refrigeration compressor rotating speed is all higher than equal to 2,
The refrigeration valve aperture of described first order electric expansion valve is corresponding to the refrigeration valve aperture of described first order electric expansion valve
Gear C.
The control method of frequency-conversion air-conditioning system the most according to claim 2, it is characterised in that the described refrigeration temperature difference
Gear A specifically include:
As △ TcoolDuring ＜-10 DEG C, A=1；
As-10 DEG C≤△ TcoolDuring ＜-5 DEG C, A=2；
As-5 DEG C≤△ TcoolDuring ＜ 5 DEG C, A=3；
As △ TcoolWhen >=5 DEG C, A=4.
The control method of frequency-conversion air-conditioning system the most according to claim 2, it is characterised in that described refrigerant compression
The gear B of machine rotating speed specifically includes:
As M >=70Hz, B=1；
As M ＜ 70Hz, B=2.
The control method of frequency-conversion air-conditioning system the most according to claim 2, it is characterised in that described first order electricity
The refrigeration valve aperture of sub-expansion valve is V1,
The gear C of the refrigeration valve aperture of described first order electric expansion valve specifically includes:
As C=1, described V1=100 steps；
As C=2, described V1=150 steps；
As C=3, described V1=200 steps；
As C=4, described V1=300 steps；
As C=5, described V1=400 steps.
6. according to the control method of the frequency-conversion air-conditioning system according to any one of claim 1-5, it is characterised in that institute
The gear F heating valve opening stating first order electric expansion valve meets:
F=D+E-1
Wherein, described D is for heating temperature difference △ TheatThe corresponding gear heating the temperature difference, described E is that described rotating speed N is corresponding
The gear heating compressor rotary speed, described D, E, F be positive integer, and described in heat the temperature difference gear number and
The described gear number heating compressor rotary speed is all higher than equal to 2,
Described first order electric expansion valve heat valve opening corresponding to described first order electric expansion valve heat valve opening
Gear F.
The control method of frequency-conversion air-conditioning system the most according to claim 6, it is characterised in that described in heat the temperature difference
Gear D specifically include:
As △ TheatDuring ＜-15 DEG C, D=1；
As-15 DEG C≤△ TheatDuring ＜-8 DEG C, D=2；
As-8 DEG C≤△ TheatDuring ＜ 8 DEG C, D=3；
As △ TheatWhen >=8 DEG C, D=4.
The control method of frequency-conversion air-conditioning system the most according to claim 6, it is characterised in that described in heat compression
The gear E of machine rotating speed specifically includes:
As N >=60Hz, E=1；
As N ＜ 60Hz, E=2.
The control method of frequency-conversion air-conditioning system the most according to claim 6, it is characterised in that described first order electricity
The valve opening that heats of sub-expansion valve is V2,
The gear F heating valve opening of described first order electric expansion valve specifically includes:
As F=1, described V2=80 steps；
As F=2, described V2=120 steps；
As F=3, described V2=180 steps；
As F=4, described V2=250 steps；
As F=5, described V2=300 steps.
The control method of frequency-conversion air-conditioning system the most according to claim 1, it is characterised in that described outdoor environment
Temperature is the temperature of outdoor heat exchanger.
The control method of 11. frequency-conversion air-conditioning systems according to claim 10, it is characterised in that described outdoor is changed
The temperature of hot device is the saturation temperature being converted into by the saturation pressure of described outdoor heat exchanger.
The control method of 12. frequency-conversion air-conditioning systems according to claim 1, it is characterised in that described indoor environment
Temperature is the temperature of indoor heat exchanger.
The control method of 13. frequency-conversion air-conditioning systems according to claim 12, it is characterised in that described indoor are changed
The temperature of hot device is the saturation temperature being converted into by the saturation pressure of described indoor heat exchanger.
The convertible frequency air-conditioner of the control method of 14. 1 kinds of frequency-conversion air-conditioning systems used according to any one of claim 1-13
System, it is characterised in that including:
Compressor, described compressor includes that the first cylinder and the second cylinder, described first cylinder have the first air entry, institute
Stating the second cylinder and have the second air entry, described compressor has exhaust outlet；
Control valve, described control valve includes that the first valve port to the 4th valve port, described first valve port are connected with described exhaust outlet,
3rd valve port and the first air entry are connected；
First Heat Exchanger, one end of described First Heat Exchanger is connected with described 4th valve port；
Second heat exchanger, one end of described second heat exchanger is connected with the second valve port；
Gas-liquid separator, described gas-liquid separator has the first connector, the second connector and outlet, described outlet and institute
State the second air entry to be connected；
First electric expansion valve, one end of described first electric expansion valve is connected with the other end of described First Heat Exchanger, institute
The other end stating the first electric expansion valve is connected with described first connector；And
Second electric expansion valve, one end of described second electric expansion valve is connected with the other end of described second heat exchanger, institute
The other end stating the second electric expansion valve is connected with described second connector,
When described frequency-conversion air-conditioning system refrigerating operaton, described first electric expansion valve be described first order electric expansion valve and
Described second electric expansion valve is described second level electric expansion valve, when described frequency-conversion air-conditioning system heating operation, and institute
State the second electric expansion valve and be described first order electric expansion valve and described first electric expansion valve is described second level electronics
Expansion valve.
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| CN106352585A (en) * | 2016-09-29 | 2017-01-25 | 广东美的制冷设备有限公司 | Air-conditioning system and control method thereof |
| CN106468487A (en) * | 2016-09-29 | 2017-03-01 | 广东美的制冷设备有限公司 | Air conditioning system and its control method |
| CN107940691A (en) * | 2017-11-03 | 2018-04-20 | 广东美的暖通设备有限公司 | A kind of control method of air-conditioning system, device and air conditioner |
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