CN108035880A - A kind of variable speed becomes the more rotor compressors of discharge capacity and its becomes displacement control - Google Patents
A kind of variable speed becomes the more rotor compressors of discharge capacity and its becomes displacement control Download PDFInfo
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- CN108035880A CN108035880A CN201711347299.8A CN201711347299A CN108035880A CN 108035880 A CN108035880 A CN 108035880A CN 201711347299 A CN201711347299 A CN 201711347299A CN 108035880 A CN108035880 A CN 108035880A
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- compressor
- gas
- solenoid valve
- liquid separator
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 230000008859 change Effects 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims description 18
- 239000012159 carrier gas Substances 0.000 claims description 13
- 238000005057 refrigeration Methods 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 239000010687 lubricating oil Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0092—Removing solid or liquid contaminants from the gas under pumping, e.g. by filtering or deposition; Purging; Scrubbing; Cleaning
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Become the more rotor compressors of discharge capacity the present invention relates to a kind of variable speed and its become displacement control, the compressor includes compressor case, at least two cylinders are equipped with the compressor case, the compressor case is equipped with exhaust outlet, the gas-liquid separator is located at outside compressor case, the gas-liquid separator is equipped with air entry, all cylinders in compressor case are connected by single connecting tube with gas-liquid separator, connecting tube between at least one cylinder and gas-liquid separator, which is equipped with, can be achieved from gas-liquid separator toward the solenoid valve of cylinder one direction on and off.Cylinder unloading principles of the present invention are clearly succinct, and Solenoid Valve Technology is ripe, more workable than prior art.The present invention does not change compressor original structure, and the increased portion part in compressor chamber body, does not reduce compressor design difficulty, while solenoid valve is easy to maintenance；The present invention can avoid gases at high pressure and lubricating oil from overflowing from being unloaded in cylinder, ensure that the reliability of cylinder unloading.
Description
Technical field
The present invention relates to a kind of variable speed rotor-type compressor, can change capacity more particularly, to one kind, and have two
A or two or more rotor variable speed becomes the more rotor compressors of discharge capacity and its becomes displacement control.
Background technology
Rotor-type compressor is a kind of positive displacement compressor, mainly by compressor housing, gas-liquid separator, cylinder, bias
Rotor etc. forms.The change of displacement is realized by rolling of the eccentric rotor in cylinder, to realize to gas system
Air-breathing, compression, the exhaust process of cryogen.In order to realize the capacity of bigger and refrigerating capacity, a rotor-type compressor can be gathered around
There are two or more cylinders (103807174 B of CN).
As refrigeration plant Energy Efficiency Standard constantly upgrades, compressor not only will Effec-tive Function under full capacity, it is also necessary to
Power consumption can be reduced under sub-load, therefore variable speed compressor (also referred to as frequency-changeable compressor) comes into being, it is by varying pressure
The rotating speed of contracting machine driving motor controls the refrigerant flow discharged from compressor.But frequency-changeable compressor frequency range
It is limited, and can also decay as rotating speed reduces electric efficiency, cause efficiency under frequency-changeable compressor underload also not high.In order to
The efficiency under underload is improved, unnecessary cylinder can be unloaded, suitably increases motor speed, electric efficiency is improved, increases at the same time
Adjustable range.
At present, the technical solution that the more rotor-type compressors of variable speed unload carrier gas cylinder is mainly by making the suction for being unloaded cylinder
Tracheae and high-pressure exhaust pipe unicom, realize that this technical solution can carry out pipeline switching (CN by Special three-way valve
102072529 B), pipeline switching (101995110 B of CN) is carried out by special four-way valve, pipe is carried out by electromagnetism five-way valve
Road switches (CN 202303713 U, CN 103353156B), and above-mentioned technical proposal is provided with three or three with top connection
Valve member carries out pipeline switching, and cost is higher.
At present, the technical solution of the more rotor-type compressor control capacities of variable speed includes, and passes through design temperature and environment
Difference between temperature determines combination and the compressor frequency (101995110 B of CN 103353156 B and CN) of cylinder, passes through
The low-limit frequency of default twin-tub operation and the highest frequency of single cylinder operation, and as single cylinder and the switching point of twin-tub
(CN102331072 B and CN102072529 B).The switching point of such scheme is all the experiment or calculating knot according to some operating mode
Fruit presets, and lacks flexibility.And in fact, the efficiency height between difference cylinder combination can change with operating mode, i.e.,
Influenced that compressor Suck and exhaust pressure can be caused to change by indoor and outdoor temperature condition, even if identical frequency, big cylinder efficiency
Although above-mentioned two technologies can realize cylinder unloading and change refrigerant delivery flow, the former transports in twin-tub
Leakage of refrigerant is easily produced when turning, the latter needs to set a complex pipeline.The present invention is wished by more succinct reliable
Above-mentioned function is realized in measure.
The content of the invention
The purpose of the present invention is exactly to provide a kind of become in order to improve the change Displacement Technology of variable speed rotor-type compressor and turn
Speed becomes the more rotor compressors of discharge capacity and its becomes displacement control.The present invention is by between compresser cylinder and gas-liquid separator
Pipeline on the solenoid valve of one-way conduction is set, cut-out is unloaded the low-pressure gas source of cylinder, while prevents gases at high pressure and lubrication
Oil is overflowed from being unloaded in cylinder, ensure that the reliability of cylinder unloading.The present invention is calculated in real time by compressor performance model
Difference cylinder combines the power for realizing identical refrigerating capacity, the cylinder combination operating of power minimum is therefrom selected, so as to fulfill compression
Machine is energy saving.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of variable speed becomes the more rotor compressors of discharge capacity, including compressor case, and being provided with the compressor case can
Variable speed electric motors, particularly, bearing, oil sump, it is characterised in that be equipped with least two cylinders, the compressor case in the compressor case
Exhaust outlet is equipped with, the gas-liquid separator is located at outside compressor case, and the gas-liquid separator is equipped with air entry, compressor
All cylinders in casing are connected by single connecting tube with gas-liquid separator, at least one cylinder and gas-liquid separator it
Between connecting tube be equipped with can be achieved from gas-liquid separator toward the solenoid valve of cylinder one direction on and off.
Eccentric rotor is installed in the cylinder.
For solenoid valve, the control to valve body on and off can be realized by control coil power on/off situation.
Hereafter illustrated in technical solution and embodiment by taking two-spool compressor as an example.But rotor-type compressor transfer
The quantity of son is infinite, installs the structure of solenoid valve in the connecting tube between gas-liquid separator of any cylinder additional, and
Carrier gas cylinder is unloaded by controlling the break-make of the solenoid valve to realize, is belonged within the protection category of this patent.
The present invention provides the first variable speed and becomes discharge capacity two-spool compressor.
The variable speed, which becomes discharge capacity two-spool compressor, includes compressor case, and upper cylinder is equipped with the compressor case
With lower cylinder, the compressor case is equipped with exhaust outlet, and the gas-liquid separator is located at outside compressor case, the gas-liquid point
Air entry is equipped with from device, the upper cylinder is connected with lower cylinder by single connecting tube with gas-liquid separator, upper cylinder
Connecting tube between gas-liquid separator is equipped with upper cylinder solenoid valve, is set in the connecting tube between lower cylinder and gas-liquid separator
There is a lower cylinder solenoid valve, the upper cylinder solenoid valve and lower cylinder solenoid valve can be achieved from gas-liquid separator toward cylinder one direction
The control of on and off.
The upper cylinder is different with lower cylinder volume.Upper cylinder and lower cylinder volume can also be arranged to identical.
The exhaust outlet is located at the top of compressor case, and the air entry is located at the top of gas-liquid separator.
The variable speed becomes discharge capacity two-spool compressor can be by controlling the break-make of upper cylinder solenoid valve and lower cylinder solenoid valve
Realize three kinds of cylinder combinations, the change of third gear capacity.When upper cylinder solenoid valve and lower cylinder solenoid valve simultaneously turn on, compression
Machine capacity is maximum, is the sum of the capacity of upper cylinder and lower cylinder；When upper cylinder solenoid valve conduction and lower cylinder solenoid valve close
When closing, compressor air-discharging amount is upper cylinder capacity；When upper cylinder solenoid valve is closed with lower cylinder solenoid valve conduction, compressor
Capacity is lower cylinder capacity.
The compressor determines that the method for cylinder combination is, after compressor start, first by upper cylinder solenoid valve and lower cylinder
Solenoid valve simultaneously turns on, and does not unload carrier gas cylinder operation, meets refrigeration capacity requirement by adjusting compressor electric motor rotating speed, or can run
The range of speeds in close to refrigeration capacity requirement.After system stabilization, the suction gaseity of compressor is gathered, while pass through compressor
Performance model, calculates do not unload carrier gas cylinder in real time, unloads three kinds of cylinder combinations such as upper cylinder, unloading lower cylinder and realizes identical refrigerating capacity
Compressor horsepower, and be switched to the minimum cylinder combined running of power and again match compressor electric motor rotating speed.If certain cylinder
It can not achieve identical refrigerating capacity under combination, in range of motor speeds and do not calculate power then, combined without considering the cylinder.
The present invention provides second of variable speed and becomes discharge capacity two-spool compressor,
The variable speed, which becomes discharge capacity two-spool compressor, includes compressor case, and upper cylinder is equipped with the compressor case
With lower cylinder, the compressor case is equipped with exhaust outlet, and the gas-liquid separator is located at outside compressor case, the gas-liquid point
Air entry is equipped with from device, the upper cylinder is connected with lower cylinder by single connecting tube with gas-liquid separator, only upper
Upper cylinder solenoid valve is set in the connecting tube between cylinder and gas-liquid separator, or, only between lower cylinder and gas-liquid separator
Connecting tube on lower cylinder solenoid valve is set, the upper cylinder solenoid valve or lower cylinder solenoid valve can be achieved from gas-liquid separator
Toward the control of cylinder one direction on and off.
Upper cylinder and the lower cylinder volume can be identical or differs.
The exhaust outlet is located at the top of compressor case, and the air entry is located at the top of gas-liquid separator.
The variable speed becomes discharge capacity two-spool compressor by controlling the break-make of solenoid valve to realize that two kinds of cylinders combine, two grades of rows
The change of tolerance.When solenoid valve conduction, compressor air-discharging amount is the sum of capacity of upper cylinder and lower cylinder；When solenoid valve closes
When closing, compressor air-discharging amount is the capacity without the cylinder of connection solenoid valve.
The compressor determines that the method for cylinder combination is after compressor start, first by solenoid valve conduction, not unload carrier gas cylinder
Operation, meets refrigeration capacity requirement by adjusting compressor electric motor rotating speed, or is needed in the range of speeds that can be run close to refrigerating capacity
Ask.After system stabilization, the suction gaseity of compressor is gathered, while by compressor performance model, calculate do not unload in real time
The compressor horsepower of identical refrigerating capacity is realized in cylinder and two kinds of the cylinder cylinder combination of unloading one, and is switched to the minimum gas of power
Cylinder combined running simultaneously matches compressor electric motor rotating speed again.If under the combination of certain cylinder, can not achieve in range of motor speeds identical
Refrigerating capacity does not calculate power then, is combined without considering the cylinder.
The compressor performance aspect of model is, by gathering compressor frequency, compressor air-discharging saturation temperature and pressure
Contracting machine air-breathing saturation temperature, can calculate the refrigerating capacity and power of compressor.
Preferably, the compressor performance model for 20 Modulus Models or other can realize the mathematics of said function
Model, model fundamental equation are as follows
Y=c1+c2Te+c3Tc+c4fr+c5Te 2+c6Tc 2+c7fr 2+c8TeTc+c9Tefr+c10Tcfr+c11Te 3+c12Tc 3+c13fr 3+
c14Te 2Tc
+c15TeTc 2+c16Te 2fr+c17Tefr 2+c18Tc 2fr+c19Tcfr 2+c20TeTcfr
Y represents the refrigerating capacity or power of compressor, f in formularRepresent the frequency of compressor, TeRepresent compressor air suction saturation
Temperature, TcRepresent compressor air-discharging saturation temperature, c1-c20For coefficient.Compressor refrigerating capacity and power under difference cylinder combination
The equation is respectively adopted to be fitted.
Heretofore described gas-liquid separator is also referred to as silencer in the document of part.
Compared with prior art, the present invention possesses advantages below：
1. cylinder unloading principles are clearly succinct, Solenoid Valve Technology is ripe, more workable than prior art.
2. not changing compressor original structure, the increased portion part in compressor chamber body, does not reduce compressor design difficulty,
Solenoid valve is easy to maintenance at the same time；
3. gases at high pressure and lubricating oil can be avoided to overflow from being unloaded in cylinder, the reliability of cylinder unloading ensure that；
4. being combined by the suitable cylinder of compressor model real-time selection, ensure compressor Effec-tive Function all the time.
Brief description of the drawings
Fig. 1 becomes discharge capacity two-spool compressor (third gear discharge capacity is variable) structure diagram for a kind of variable speed.
Fig. 2 becomes discharge capacity two-spool compressor (third gear discharge capacity is variable) displacement control logic chart for a kind of variable speed.
Fig. 3 becomes discharge capacity two-spool compressor (two grades of discharge capacities are variable) structure diagram for a kind of variable speed.
Fig. 4 becomes discharge capacity two-spool compressor (two grades of discharge capacities are variable) displacement control logic chart for a kind of variable speed.
In figure, 1 is compressor case, and 2 be upper cylinder, and 3 be lower cylinder, and 4 be exhaust outlet, and 5 be air entry, and 6 be gas-liquid point
From device, 8 be upper cylinder solenoid valve, and 11 be lower cylinder solenoid valve, and 7,9,10,12 be connecting tube.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of variable speed becomes discharge capacity two-spool compressor, and third gear discharge capacity is variable, and primary structure is as shown in Figure 1, including compression
Machine casing 1, upper cylinder 2, lower cylinder 3, exhaust outlet 4, air entry 5, gas-liquid separator 6, upper cylinder solenoid valve 8, lower cylinder electromagnetism
Valve 11, connecting tube 7,9,10,12.
Variable-speed motor, bearing, oil sump, and upper cylinder 2, lower cylinder 3 are installed in compressor case 1.2 He of upper cylinder
Eccentric rotor is separately installed with lower cylinder 3, and is connected respectively by connecting tube with gas-liquid separator 6, is set respectively in connecting tube
It is equipped with upper cylinder solenoid valve 8, lower cylinder solenoid valve 11.That is, upper cylinder 2 passes through connecting tube 9, upper cylinder solenoid valve 8, connecting tube 7
It is connected to gas-liquid separator 6 to export, lower cylinder 3 is connected to gas-liquid point by connecting tube 12, lower cylinder solenoid valve 11, connecting tube 10
Exported from device 6,6 entrance of gas-liquid separator is air entry 5.
But upper cylinder 2 is different with the internal volume of lower cylinder 3.Exhaust outlet 4 is located at the top of compressor case 1, air entry 5
In the top of gas-liquid separator 6.
The compressor by controlling the break-make of upper cylinder solenoid valve 8 and lower cylinder solenoid valve 11 to realize that three kinds of cylinders combine,
The change of third gear capacity.When upper cylinder solenoid valve 8 and the unicom at the same time of lower cylinder solenoid valve 11, compressor air-discharging amount is maximum,
For the sum of capacity of upper cylinder 2 and lower cylinder 3；When 8 unicom of upper cylinder solenoid valve and lower cylinder solenoid valve 11 are closed, compression
Machine capacity is 2 capacity of upper cylinder；When upper cylinder solenoid valve 8 is closed with lower cylinder 11 unicom of solenoid valve, compressor air-discharging
Measure as 3 capacity of lower cylinder.
The control logic of the compressor air-discharging amount as shown in Fig. 2, after compressor start, first by upper cylinder solenoid valve and under
Cylinder solenoid valve simultaneously turns on, and does not unload carrier gas cylinder operation, meets refrigeration capacity requirement by adjusting compressor electric motor rotating speed, or can
Close to refrigeration capacity requirement in the range of speeds of operation.After system stabilization, the suction gaseity of compressor is gathered, while pass through pressure
Contracting machine performance model, calculates do not unload carrier gas cylinder in real time, unloads three kinds of cylinder combinations such as upper cylinder, unloading lower cylinder and realizes identical system
The compressor horsepower of cold, and be switched to the minimum cylinder combined running of power and match compressor electric motor rotating speed again.If certain
Under cylinder combination, identical refrigerating capacity is can not achieve in range of motor speeds and does not calculate power then, combined without considering the cylinder.
Embodiment 2
A kind of variable speed becomes discharge capacity two-spool compressor, and two grades of discharge capacities are variable, and primary structure is as shown in Figure 3.With embodiment 1
Compare, the upper cylinder 2 of embodiment 2 and lower cylinder 3 can be identical two cylinders or the different cylinder of capacity, at the same time
Eliminate upper cylinder solenoid valve 8.
The compressor is by controlling the break-make of lower cylinder solenoid valve 11 to realize that two kinds of cylinders combine, the change of two grades of capacities
Change.Instantly during 11 unicom of cylinder solenoid valve, compressor air-discharging amount is the sum of capacity of upper cylinder 2 and lower cylinder 3；Work as lower cylinder
When solenoid valve 11 is closed, compressor air-discharging amount is 2 capacity of upper cylinder.
The control logic of the compressor air-discharging amount, first by solenoid valve conduction, is not unloaded as shown in figure 4, after compressor start
Carrier gas cylinder is run, and meets refrigeration capacity requirement by adjusting compressor electric motor rotating speed, or close to system in the range of speeds that can be run
Refrigeration requirement.After system stabilization, the suction gaseity of compressor is gathered, while by compressor performance model, calculate in real time
Carrier gas cylinder is not unloaded and the compressor horsepower of identical refrigerating capacity is realized in two kinds of the cylinder cylinder combination of unloading one, and is switched to power most
Low operation simultaneously matches compressor electric motor rotating speed again.If under the combination of certain cylinder, identical system is can not achieve in range of motor speeds
Cold does not calculate power then, is combined without considering the cylinder.
The above-mentioned description to embodiment is understood that for ease of those skilled in the art and using invention.
Person skilled in the art obviously easily can make these embodiments various modifications, and described herein general
Principle is applied in other embodiment without by performing creative labour.Therefore, the invention is not restricted to above-described embodiment, ability
Field technique personnel disclose according to the present invention, do not depart from improvement that scope made and modification all should be the present invention's
Within protection domain.
Claims (10)
1. a kind of variable speed becomes the more rotor compressors of discharge capacity, including compressor case, speed change is installed in the compressor case
Motor, bearing, oil sump, it is characterised in that at least two cylinders are equipped with the compressor case, on the compressor case
Equipped with exhaust outlet, the gas-liquid separator is located at outside compressor case, and the gas-liquid separator is equipped with air entry, compressor machine
All cylinders in shell are connected by single connecting tube with gas-liquid separator, between at least one cylinder and gas-liquid separator
Connecting tube be equipped with can be achieved from gas-liquid separator toward the solenoid valve of cylinder one direction on and off.
2. a kind of variable speed according to claim 1 becomes the more rotor compressors of discharge capacity, it is characterised in that peace in the cylinder
Equipped with eccentric rotor.
3. a kind of variable speed according to claim 1 becomes the more rotor compressors of discharge capacity, it is characterised in that the variable speed becomes
The more rotor compressors of discharge capacity become discharge capacity two-spool compressor for variable speed,
The variable speed, which becomes discharge capacity two-spool compressor, includes compressor case, and upper cylinder is equipped with the compressor case with
Cylinder, the compressor case are equipped with exhaust outlet, and the gas-liquid separator is located at outside compressor case, the gas-liquid separator
Air entry is equipped with, the upper cylinder is connected with lower cylinder by single connecting tube with gas-liquid separator, upper cylinder and gas
Connecting tube between liquid/gas separator is equipped with upper cylinder solenoid valve, and the connecting tube between lower cylinder and gas-liquid separator is equipped with down
Cylinder solenoid valve, the upper cylinder solenoid valve and lower cylinder solenoid valve can be achieved to turn on from gas-liquid separator toward cylinder one direction
Or the control closed.
4. a kind of variable speed according to claim 3 becomes the more rotor compressors of discharge capacity, it is characterised in that the upper cylinder and
Lower cylinder volume is different.
5. a kind of variable speed according to claim 1 becomes the more rotor compressors of discharge capacity, it is characterised in that the variable speed becomes
The more rotor compressors of discharge capacity become discharge capacity two-spool compressor for variable speed,
The variable speed, which becomes discharge capacity two-spool compressor, includes compressor case, and upper cylinder is equipped with the compressor case with
Cylinder, the compressor case are equipped with exhaust outlet, and the gas-liquid separator is located at outside compressor case, the gas-liquid separator
Air entry is equipped with, the upper cylinder is connected with lower cylinder by single connecting tube with gas-liquid separator, only in upper cylinder
Upper cylinder solenoid valve, or, the only company between lower cylinder and gas-liquid separator are set in the connecting tube between gas-liquid separator
Lower cylinder solenoid valve is set in adapter, and the upper cylinder solenoid valve or lower cylinder solenoid valve can be achieved from gas-liquid separator toward gas
The control of cylinder one direction on and off.
6. a kind of variable speed according to claim 5 becomes the more rotor compressors of discharge capacity, it is characterised in that the upper cylinder and
Lower cylinder volume can be identical or differs.
7. a kind of variable speed according to claim 1,2,3 or 5 becomes the more rotor compressors of discharge capacity, it is characterised in that described
Exhaust outlet is located at the top of compressor case, and the air entry is located at the top of gas-liquid separator, the upper cylinder and lower cylinder
Inside it is mounted on eccentric rotor.
8. variable speed as claimed in claim 3 becomes the change displacement control of the more rotor compressors of discharge capacity, it is characterised in that passes through
The break-make of control upper cylinder solenoid valve and lower cylinder solenoid valve realizes the change of third gear capacity, when upper cylinder solenoid valve and lower gas
When cylinder solenoid valve simultaneously turns on, compressor air-discharging amount is maximum, is the sum of the capacity of upper cylinder and lower cylinder；When upper cylinder electromagnetism
When valve turns on and lower cylinder solenoid valve is closed, compressor air-discharging amount is upper cylinder capacity；When upper cylinder solenoid valve close and under
When cylinder solenoid valve turns on, compressor air-discharging amount is lower cylinder capacity；
The compressor determines that the method for cylinder combination is, after compressor start, first by upper cylinder solenoid valve and lower cylinder electromagnetism
Valve simultaneously turns on, and does not unload carrier gas cylinder operation, meets refrigeration capacity requirement by adjusting compressor electric motor rotating speed, or turn what can be run
Close to refrigeration capacity requirement in fast scope, after system stabilization, the suction gaseity of compressor is gathered, while pass through compressor performance
Model, calculates and does not unload carrier gas cylinder, unloading upper cylinder, unloads the compression that identical refrigerating capacity is realized in three kinds of cylinders combinations of lower cylinder in real time
Acc power, and be switched to the minimum cylinder combined running of power and match compressor electric motor rotating speed again, if under the combination of certain cylinder,
It can not achieve identical refrigerating capacity in range of motor speeds and do not calculate power then, combined without considering the cylinder.
9. variable speed as claimed in claim 5 becomes the change displacement control of the more rotor compressors of discharge capacity, it is characterised in that passes through
The break-make of control solenoid valve realizes the change of two grades of capacities, and when solenoid valve conduction, compressor air-discharging amount is upper cylinder with
The sum of capacity of cylinder；When solenoid valve is closed, compressor air-discharging amount is the capacity without the cylinder of connection solenoid valve；
The compressor determines that the method for cylinder combination is, after compressor start, first by solenoid valve conduction, does not unload carrier gas cylinder fortune
OK, refrigeration capacity requirement is met by adjusting compressor electric motor rotating speed, or close to refrigeration capacity requirement in the range of speeds that can be run,
After system stabilization, the suction gaseity of compressor is gathered, while by compressor performance model, calculate do not unload carrier gas cylinder in real time
The compressor horsepower of identical refrigerating capacity is realized with two kinds of the cylinder cylinder combination of unloading one, and is switched to the minimum air cylinder group of power
Close and run and match again compressor electric motor rotating speed, if under the combination of certain cylinder, identical refrigeration is can not achieve in range of motor speeds
Amount does not calculate power then, is combined without considering the cylinder.
10. variable speed becomes the change displacement control of the more rotor compressors of discharge capacity according to claim 8 or claim 9, its feature exists
In the compressor calculates pressure by gathering compressor frequency, compressor air-discharging saturation temperature and compressor air suction saturation temperature
The refrigerating capacity and power of contracting machine；
The compressor performance model is 20 Modulus Models, and model fundamental equation is as follows
Y=c1+c2Te+c3Tc+c4fr+c5Te 2+c6Tc 2+c7fr 2+c8TeTc+c9Tefr+c10Tcfr+c11Te 3+c12Tc 3+c13fr 3+
c14Te 2Tc+c15TeTc 2+c16Te 2fr+c17Tefr 2+c18Tc 2fr+c19Tcfr 2+c20TeTcfr
Y represents the refrigerating capacity or power of compressor, f in formularRepresent the frequency of compressor, TeCompressor air suction saturation temperature is represented,
TcRepresent compressor air-discharging saturation temperature, c1-c20For coefficient, compressor refrigerating capacity and power under difference cylinder combination are adopted respectively
It is fitted with the equation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711347299.8A CN108035880B (en) | 2017-12-15 | 2017-12-15 | A kind of variable speed becomes the more rotor compressors of discharge capacity and its becomes displacement control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711347299.8A CN108035880B (en) | 2017-12-15 | 2017-12-15 | A kind of variable speed becomes the more rotor compressors of discharge capacity and its becomes displacement control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108035880A true CN108035880A (en) | 2018-05-15 |
| CN108035880B CN108035880B (en) | 2019-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711347299.8A Expired - Fee Related CN108035880B (en) | 2017-12-15 | 2017-12-15 | A kind of variable speed becomes the more rotor compressors of discharge capacity and its becomes displacement control |
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| CN (1) | CN108035880B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340113A (en) * | 2018-11-19 | 2019-02-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump assembly and compressor |
| WO2021047108A1 (en) * | 2019-09-11 | 2021-03-18 | 珠海格力电器股份有限公司 | Two-stage compressor, control method for two-stage compressor, and air conditioning unit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357889A (en) * | 1986-08-29 | 1988-03-12 | Toshiba Corp | Rotary type compressor |
| CN100396935C (en) * | 2004-06-11 | 2008-06-25 | 东芝开利株式会社 | Hermetic rotary compressor |
| CN102203425A (en) * | 2008-11-17 | 2011-09-28 | Lg电子株式会社 | Frequency- variable compressor and control method thereof |
| CN202149029U (en) * | 2011-08-10 | 2012-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Air compressor and air conditioning system provided with same |
-
2017
- 2017-12-15 CN CN201711347299.8A patent/CN108035880B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357889A (en) * | 1986-08-29 | 1988-03-12 | Toshiba Corp | Rotary type compressor |
| CN100396935C (en) * | 2004-06-11 | 2008-06-25 | 东芝开利株式会社 | Hermetic rotary compressor |
| CN102203425A (en) * | 2008-11-17 | 2011-09-28 | Lg电子株式会社 | Frequency- variable compressor and control method thereof |
| CN202149029U (en) * | 2011-08-10 | 2012-02-22 | 珠海格力节能环保制冷技术研究中心有限公司 | Air compressor and air conditioning system provided with same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109340113A (en) * | 2018-11-19 | 2019-02-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Pump assembly and compressor |
| WO2021047108A1 (en) * | 2019-09-11 | 2021-03-18 | 珠海格力电器股份有限公司 | Two-stage compressor, control method for two-stage compressor, and air conditioning unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108035880B (en) | 2019-11-05 |
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