CN108035880B - 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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- CN108035880B CN108035880B CN201711347299.8A CN201711347299A CN108035880B CN 108035880 B CN108035880 B CN 108035880B CN 201711347299 A CN201711347299 A CN 201711347299A CN 108035880 B CN108035880 B CN 108035880B
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- 238000006073 displacement reaction Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 49
- 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
- 230000008859 change Effects 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 7
- 238000007906 compression Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 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
- 238000001816 cooling Methods 0.000 description 2
- 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
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 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
-
- 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 becomes displacement control, the compressor includes compressor case, at least two cylinders are equipped in 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 connect by individual 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 mature, than prior art strong operability.The present invention has not been changed 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 high pressure gas and lubricating oil and overflow 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 compressors, can change capacity more particularly, to one kind, and have two
The variable speed of a or more than two rotors becomes the more rotor compressors of discharge capacity and its becomes displacement control.
Background technique
Rotor-type compressor is a kind of positive displacement compressor, mainly by compressor housing, gas-liquid separator, cylinder, bias
The composition such as rotor.Realize the variation of displacement, 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 bigger capacity and refrigerating capacity, a rotor-type compressor can be gathered around
There are two or more than two cylinders (103807174 B of CN).
As refrigeration equipment Energy Efficiency Standard constantly upgrades, compressor not only will efficient operation under full capacity, it is also necessary to
It can reduce power consumption under sub-load, therefore variable speed compressor (also referred to as frequency-changeable compressor) comes into being, it is by changing pressure
The revolving speed of contracting machine driving motor controls refrigerant flow exhausted from the compressor.But frequency-changeable compressor frequency range
It is limited, and can also decay as revolving speed reduces electric efficiency, cause efficiency under frequency-changeable compressor underload also not high.In order to
The efficiency under underload is improved, extra cylinder can be unloaded, suitably increase motor speed, electric efficiency is improved, increases simultaneously
Adjustable range.
Currently, the technical solution that the more rotor-type compressors of variable speed unload carrier gas cylinder mainly passes through the suction for making to be unloaded cylinder
Tracheae and high-pressure exhaust pipe connection 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 dedicated 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, higher cost.
Currently, the technical solution of the more rotor-type compressor control capacities of variable speed includes passing through set 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 the switching point of single cylinder and twin-tub
(CN102331072 B and CN102072529 B).The switching point of above scheme is all the experiment or calculating knot according to some operating condition
Fruit presets, and lacks flexibility.And in fact, the efficiency height between difference cylinder combination can change with operating condition, i.e.,
It is influenced to will cause the variation of compressor Suck and exhaust pressure, even if identical frequency, big cylinder efficiency by indoor and outdoor temperature condition
Although above-mentioned two technologies can realize cylinder unloading and change refrigerant delivery flow, the former transports in twin-tub
Leakage of refrigerant is easy to produce when turning, the latter needs to be arranged a complex pipeline.The present invention wishes by more succinct reliable
Above-mentioned function is realized in measure.
Summary of the invention
The object of the invention is to provide a kind of become in order to improve the change Displacement Technology of variable speed rotor-type compressor to 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, cutting is unloaded the low-pressure gas source of cylinder, while preventing high pressure gas 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
The power of identical refrigerating capacity is realized in difference cylinder combination, the smallest cylinder combination operating of power is therefrom selected, to realize compression
Machine energy conservation.
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 equipped in the compressor case can
Variable speed electric motors, particularly, bearing, oil sump, which is characterized in that at least two cylinders, the compressor case are equipped in the compressor case
It is 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
All cylinders in casing are connect by individual 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 it is illustrated by taking two-spool compressor as an example in technical solution and embodiment.But rotor-type compressor transfer
The quantity of son is infinite, the structure of installation solenoid valve in the connecting tube between gas-liquid separator of any cylinder, and
On-off by controlling the solenoid valve, which is realized, unloads carrier gas cylinder, belongs within the protection category of this patent.
The present invention provides the first variable speed and becomes discharge capacity two-spool compressor.
It includes compressor case that the variable speed, which becomes discharge capacity two-spool compressor, and upper cylinder is equipped in 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
It is equipped with air entry from device, the upper cylinder is connect by individual connecting tube with gas-liquid separator with lower cylinder, upper cylinder
Connecting tube between gas-liquid separator is equipped with upper cylinder solenoid valve, sets 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 the on-off of control upper cylinder solenoid valve and lower cylinder solenoid valve
Realize three kinds of cylinder combinations, the variation 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 upper cylinder and the capacity of 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 method that the compressor determines 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 revolving speed, or can run
The range of speeds in close to refrigeration capacity requirement.After the system stabilizes, the suction gaseity of compressor is acquired, while passing through compressor
Performance model calculates do not unload carrier gas cylinder in real time, unloads upper cylinder, and identical refrigerating capacity is realized in three kinds of cylinder combinations such as unloading lower cylinder
Compressor horsepower, and be switched to the minimum cylinder combined running of power and again match compressor electric motor revolving speed.If certain cylinder
It can not achieve identical refrigerating capacity under combination, in range of motor speeds and do not calculate power then, do not consider that the cylinder combines.
The present invention provides second of variable speed and becomes discharge capacity two-spool compressor,
It includes compressor case that the variable speed, which becomes discharge capacity two-spool compressor, and upper cylinder is equipped in 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
It is equipped with air entry from device, the upper cylinder is connect by individual connecting tube with gas-liquid separator with lower cylinder, 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.
The upper cylinder and lower cylinder volume can be identical or not 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 and realizes two kinds of cylinder combinations, two grades of rows by the on-off of control solenoid valve
The variation of tolerance.When solenoid valve conduction, compressor air-discharging amount is the sum of upper cylinder and the capacity of lower cylinder；When solenoid valve closes
When closing, compressor air-discharging amount is the capacity without connecting the cylinder of solenoid valve.
The method that the compressor determines 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 revolving speed, or needs in the range of speeds that can be run close to refrigerating capacity
It asks.After the system stabilizes, the suction gaseity of compressor is acquired, while by compressor performance model, calculating do not unload in real time
The compressor horsepower of cylinder refrigerating capacity identical with two kinds of the cylinder cylinder combination realization of unloading one, and it is switched to the minimum gas of power
Cylinder combined running simultaneously matches compressor electric motor revolving speed again.If can not achieve in range of motor speeds identical under the combination of certain cylinder
Refrigerating capacity does not calculate power then, does not consider that the cylinder combines.
The compressor performance aspect of model is, by acquiring 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 is 20 Modulus Models or the mathematics of said function may be implemented in other
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 has following advantages:
1. cylinder unloading principles are clearly succinct, Solenoid Valve Technology is mature, than prior art strong operability.
2. having not been changed compressor original structure, the increased portion part in compressor chamber body, does not reduce compressor design difficulty,
Solenoid valve is easy to maintenance simultaneously；
3. avoidable high pressure gas and lubricating oil are overflowed from being unloaded in cylinder, the reliability of cylinder unloading ensure that；
4. guaranteeing compressor efficient operation always by the suitable cylinder combination of compressor model real-time selection.
Detailed description of the invention
Fig. 1 is that a kind of variable speed becomes discharge capacity two-spool compressor (third gear discharge capacity is variable) structural schematic diagram.
Fig. 2 is that a kind of variable speed becomes discharge capacity two-spool compressor (third gear discharge capacity is variable) displacement control logic chart.
Fig. 3 is that a kind of variable speed becomes discharge capacity two-spool compressor (two grades of discharge capacities are variable) structural schematic diagram.
Fig. 4 is that a kind of variable speed becomes discharge capacity two-spool compressor (two grades of discharge capacities are variable) displacement control logic chart.
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.
Specific 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 change discharge capacity two-spool compressor, third gear discharge capacity is variable, and primary structure is as shown in Figure 1, include 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
It is separately installed with eccentric rotor in lower cylinder 3, and is connected to 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 the outlet of gas-liquid separator 6, lower cylinder 3 is connected to gas-liquid point by connecting tube 12, lower cylinder solenoid valve 11, connecting tube 10
It is 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, and air entry 5
In the top of gas-liquid separator 6.
The compressor realizes three kinds of cylinder combinations by the on-off of control upper cylinder solenoid valve 8 and lower cylinder solenoid valve 11,
The variation of third gear capacity.When upper cylinder solenoid valve 8 and the connection simultaneously of lower cylinder solenoid valve 11, compressor air-discharging amount is maximum,
For the sum of upper cylinder 2 and the capacity of lower cylinder 3；When 8 connection 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 11 connection of lower cylinder solenoid valve, compressor air-discharging
Amount is 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 revolving speed, or can
Close to refrigeration capacity requirement in the range of speeds of operation.After the system stabilizes, the suction gaseity of compressor is acquired, while passing through pressure
Contracting machine performance model calculates do not unload carrier gas cylinder in real time, unloads upper cylinder, and identical system is realized in three kinds of cylinder combinations such as unloading lower cylinder
The compressor horsepower of cooling capacity, and be switched to the minimum cylinder combined running of power and match compressor electric motor revolving speed again.If certain
Under cylinder combination, it can not achieve identical refrigerating capacity in range of motor speeds and do not calculate power then, do not consider that the cylinder combines.
Embodiment 2
A kind of variable speed change discharge capacity two-spool compressor, two grades of discharge capacities are variable, and primary structure is as shown in Figure 3.With embodiment 1
It compares, the upper cylinder 2 of embodiment 2 and lower cylinder 3 can be identical two cylinders or the different cylinder of capacity, simultaneously
Eliminate upper cylinder solenoid valve 8.
The compressor realizes two kinds of cylinder combinations, the change of two grades of capacities by the on-off of control lower cylinder solenoid valve 11
Change.Instantly when 11 connection of cylinder solenoid valve, compressor air-discharging amount is the sum of upper cylinder 2 and the capacity of 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 operation, meets refrigeration capacity requirement by adjusting compressor electric motor revolving speed, or close to system in the range of speeds that can be run
Refrigeration requirement.After the system stabilizes, the suction gaseity of compressor is acquired, while by compressor performance model, being calculated in real time
The compressor horsepower of carrier gas cylinder refrigerating capacity identical with two kinds of the cylinder cylinder combination realization of unloading one is not unloaded, and is switched to power most
Low operation simultaneously matches compressor electric motor revolving speed again.If can not achieve identical system in range of motor speeds under the combination of certain cylinder
Cooling capacity does not calculate power then, does not consider that the cylinder combines.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be of the invention
Within protection scope.
Claims (8)
1. a kind of variable speed becomes discharge capacity two-spool compressor, which is characterized in that including compressor case, in the compressor case
Equipped with upper cylinder and lower cylinder, the compressor case is equipped with exhaust outlet, and gas-liquid separator is located at outside compressor case, described
Gas-liquid separator is equipped with air entry, and the upper cylinder is connect by individual connecting tube with gas-liquid separator with lower cylinder,
Connecting tube between upper cylinder and gas-liquid separator is equipped with upper cylinder solenoid valve, the connection between lower cylinder and gas-liquid separator
Pipe is equipped with lower cylinder solenoid valve, and the upper cylinder solenoid valve and lower cylinder solenoid valve can be achieved from gas-liquid separator toward cylinder
The control of one direction on and off；
The variable speed becomes the change displacement control of discharge capacity two-spool compressor are as follows: passes through control upper cylinder solenoid valve and lower gas
The on-off of cylinder solenoid valve realizes the variation of third gear capacity, when upper cylinder solenoid valve and lower cylinder solenoid valve simultaneously turn on, pressure
Contracting machine capacity is maximum, is the sum of upper cylinder and the capacity of lower cylinder；When upper cylinder solenoid valve conduction and lower cylinder solenoid valve
When closing, compressor air-discharging amount is upper cylinder capacity；When upper cylinder solenoid valve is closed with lower cylinder solenoid valve conduction, compression
Machine capacity is lower cylinder capacity；
The method that the compressor determines 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 revolving speed, or turn what can be run
Close to refrigeration capacity requirement in fast range, after the system stabilizes, the suction gaseity of compressor is acquired, while passing through compressor performance
Model calculates do not unload carrier gas cylinder, unloading upper cylinder in real time, unloads the compression that identical refrigerating capacity is realized in three kinds of cylinders combinations of lower cylinder
Machine power, and be switched to the minimum cylinder combined running of power and match compressor electric motor revolving 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, do not consider that the cylinder combines；
The compressor is calculated by acquisition compressor frequency, compressor air-discharging saturation temperature and compressor air suction saturation temperature
The refrigerating capacity and power of compressor；
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.
2. a kind of variable speed according to claim 1 becomes discharge capacity two-spool compressor, which is characterized in that the upper cylinder and
Lower cylinder volume is different.
3. a kind of variable speed according to claim 1 becomes discharge capacity two-spool compressor, which is characterized in that peace in the cylinder
Equipped with eccentric rotor.
4. a kind of variable speed according to claim 1 becomes discharge capacity two-spool compressor, which is characterized in that the exhaust outlet position
In the top of compressor case, the air entry is located at the top of gas-liquid separator, is respectively mounted in the upper cylinder and lower cylinder
There is eccentric rotor.
5. a kind of variable speed becomes discharge capacity two-spool compressor, which is characterized in that including compressor case, in the compressor case
Equipped with upper cylinder and lower cylinder, the compressor case is equipped with exhaust outlet, and gas-liquid separator is located at outside compressor case, described
Gas-liquid separator is equipped with air entry, and the upper cylinder is connect by individual connecting tube with gas-liquid separator with lower cylinder,
Upper cylinder solenoid valve only is set in the connecting tube between upper cylinder and gas-liquid separator, or, only in lower cylinder and gas-liquid separation
Lower cylinder solenoid valve is set in the connecting tube between device, and the upper cylinder solenoid valve or lower cylinder solenoid valve can be achieved from gas-liquid
Control of the separator toward cylinder one direction on and off；
The variable speed becomes the change displacement control of discharge capacity two-spool compressor are as follows: the on-off by controlling solenoid valve realizes two
The variation of shelves capacity, when solenoid valve conduction, compressor air-discharging amount is the sum of upper cylinder and the capacity of lower cylinder；Work as electromagnetism
When valve is closed, compressor air-discharging amount is the capacity without connecting the cylinder of solenoid valve；
The method that the compressor determines cylinder combination is, after compressor start, first by solenoid valve conduction, does not unload carrier gas cylinder fortune
Row, meets refrigeration capacity requirement by adjusting compressor electric motor revolving speed, or close to refrigeration capacity requirement in the range of speeds that can be run,
After the system stabilizes, the suction gaseity of compressor is acquired, while by compressor performance model, calculating do not unload carrier gas cylinder in real time
The compressor horsepower of refrigerating capacity identical with two kinds of the cylinder cylinder combination realization of unloading one, and it is switched to the minimum air cylinder group of power
It closes and runs and match again compressor electric motor revolving speed, if can not achieve identical refrigeration in range of motor speeds under the combination of certain cylinder
Amount does not calculate power then, does not consider that the cylinder combines；
The compressor is calculated by acquisition compressor frequency, compressor air-discharging saturation temperature and compressor air suction saturation temperature
The refrigerating capacity and power of compressor；
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.
6. a kind of variable speed according to claim 5 becomes discharge capacity two-spool compressor, which is characterized in that the upper cylinder and
Lower cylinder volume is identical or not identical.
7. a kind of variable speed according to claim 5 becomes discharge capacity two-spool compressor, which is characterized in that peace in the cylinder
Equipped with eccentric rotor.
8. a kind of variable speed according to claim 5 becomes discharge capacity two-spool compressor, which is characterized in that the exhaust outlet position
In the top of compressor case, the air entry is located at the top of gas-liquid separator, is respectively mounted in the upper cylinder and lower cylinder
There is eccentric rotor.
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 |
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| Publication Number | Publication Date |
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| CN108035880A CN108035880A (en) | 2018-05-15 |
| CN108035880B true CN108035880B (en) | 2019-11-05 |
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| 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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| 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 |
| CN110617218B (en) * | 2019-09-11 | 2023-12-22 | 珠海格力电器股份有限公司 | Control method of two-stage compressor and air conditioning unit |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6357889A (en) * | 1986-08-29 | 1988-03-12 | Toshiba Corp | Rotary type compressor |
| KR100758403B1 (en) * | 2004-06-11 | 2007-09-14 | 도시바 캐리어 가부시키 가이샤 | Hermetic rotary compressor |
| KR101268612B1 (en) * | 2008-11-17 | 2013-05-29 | 엘지전자 주식회사 | Variable frequency compressor and method of controlling the same |
| 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 |
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