CN103097729B - It is applicable to the control method for resonant linear compressor and the electronic control system for resonant linear compressor of cooling system - Google Patents
It is applicable to the control method for resonant linear compressor and the electronic control system for resonant linear compressor of cooling system Download PDFInfo
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- CN103097729B CN103097729B CN201180043649.6A CN201180043649A CN103097729B CN 103097729 B CN103097729 B CN 103097729B CN 201180043649 A CN201180043649 A CN 201180043649A CN 103097729 B CN103097729 B CN 103097729B
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- 238000001816 cooling Methods 0.000 title claims abstract description 22
- 238000006073 displacement reaction Methods 0.000 claims description 29
- 230000005611 electricity Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 8
- 230000003247 decreasing Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 230000000051 modifying Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011031 large scale production Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The present invention relates to a kind of control method for resonant linear compressor and system, its ability being particularly well-suited to control cooling system.Such method consists essentially of following steps: a) read the reference operation power (I of the motor of described compressor (100)MED)；B) the operation electric current (I of the motor of compressor (100) is measuredMED)；C) the operation voltage of the control module of described compressor (100) is measured；D) as the operation electric current (I measured in step b)MED) and the function of operation voltage that obtains in the step c) calculate the input power (P of motor of described compressor (100)MED)；E) input power (P that will calculate in abovementioned stepsMED) operate power (P with described referenceref) compare；If it is f) described with reference to operating power (PREF) than described input power (PMED) high, then improve the operation voltage (UC) of described compressor；If it is g) described with reference to operation power (Pref) than described input power (PMED) low, then reduce the operation voltage (UC) of described compressor.
Description
Technical field
The present invention relates to a kind of control method for resonant linear compressor and system, this equipment is applicable to cooling system
System is to control its ability.
The solution proposed make use of optimal control, its substantially compressor with for described supply of equipment
And/or supported on the entrance power that compares of reference power calculated.
Background technology
Alternating piston formula compressor produces pressure by the gas of the radial movement compresses cylinder internal by its piston,
The gas (suction pressure or evaporating pressure) making low-pressure side will enter cylinder by inlet valve.
Described gas moves further through piston and is compressed at cylinder internal, and after being compressed, it by dump valve from
Cylinder out enters high-pressure side (discharge pressure or condensing pressure).
For resonant linear compressor, piston is braked by linear actuators, described linear actuators by support and
The Magnet that can be braked by one or more windings, movable part (piston, support and Magnet) is connected to fixed component (vapour
Cylinder, stator, winding, capping and framework) one or more springs formed.Movable part and spring form the resonance of compressor
Assembly.
Then, linear motor the resonant component braked has the function producing linear alternated movement, makes cylinder internal
Piston move and apply compressed action so that the gas that accepted by inlet valve of compression, until it can be discharged to by dump valve
On high-tension side point.
The operation amplitude of Linearkompressor by the power that produced by motor with consumed when compressed gas by mechanism
The balance of power regulates.By this way, do not exist for the limit defined in the amplitude peak of piston displacement, and have must
Measure or estimate maximum displacement so that control system can brake compressor and prevent piston to stroke endpoint safely
Mechanical shock.This impact may produce the loss in efficiency of compressor, sound noise and fault.
Another key property of resonant linear compressor is their braking frequency, because such equipment is designed
Work under the resonant frequency at the so-called quality/elastic system of assembly.In this case, the efficiency of equipment is maximum
, gross mass is equal to the sum of the quality of movable part (piston, support and Magnet), and so-called equivalence elastic force is equal to
The resonance elastic force of system adds by the sum of gas elastic force produced by gas compression power.
Described gas compression power has the behavior similar with variable and nonlinear elastic force, and it depends on cooling system
Evaporating pressure and condensing pressure, and also depend on the gas used in systems.
When system operates at the resonant frequency fx, motor current is orthogonal with displacement, or motor current and motor
Counter electromotive force homophase because the latter is proportional to the counter electromotive force deriving from displacement.
Because braking frequency is adjusted to resonant frequency, so it is known that in order to change cooling capacity, it is necessary to change
The amplitude of piston displacement, thus change the gas volume of each cyclic permutation and the cooling capacity of compressor.
To measure or estimate the solution of stroke in most solutions available in the prior art of control ability at present
Certainly scheme is combined with the system controlling maximum displacement, regulates this displacement to revise cooling capacity.
Therefore, the solution proposed for obtaining compressor stroke is the use of position sensor, such as at document
Solution party described in PI0001404-4, PI0203724-6, US5,897,296, JP1336661 and US5,897,269
Case.
It is to be noted that all solutions with the position sensor for measuring stroke have higher complexity
Property, promote more stroke, additionally need more electric wires and the external connection of compressor.Because cooling compressor is to seal
And can suffer from high temperature and high pressure, so except the fact that internal medium is also subjected to large-scale variations in temperature of compressor
Outside, extra connection is needed to be a big difficult point, this also makes the use of sensor become difficulty.Furthermore, it is possible to exist right
In the needs at production period or the process calibrating described sensor at its run duration.
Other solution non-use position sensors, as patent US5,342,176, US5,496,193, US4,642,
Those of 547.Similar with three solutions mentioned before, document US6,176,683, KR96-79125 and KR96-
15062 the most do not use position sensor on their object.
Some in these solutions of non-use position sensor are complication systems, and it is required to set up frequency
Sensor and can change operation frequency or amendment waveform output.For instance, it is possible to document US2003/108430A1,
US2001/005320A1, US2007/095073A1 and US2004/108824A1 see these technology.
Therefore, it is noted that do not have the solution of position sensor to have good accuracy or operational stability,
And it is said that in general, need other kinds of sensor, such as temperature sensor or for detecting the accelerometer of impact.This
Outward, the structure of compressor it may also be desirable to the mechanical solution making compressor more resistant to mechanical shock, described machinery
Impact the performance of ordinary loss compressor or bring fringe cost.
In the face of above, it is proposed that purpose is to provide the control method for resonance compressor and the present invention of system,
Described control method and system can provide, for equipment, the control more effectively and more optimized in terms of controlling the ability of cooling system.
Goal of the invention
The first object of the present invention is to provide can provide control that capacity of equipment controls, for resonant linear compressor
Method.
Second target of the present invention is to provide the electronic control system for Linearkompressor, and it is particularly well-suited to cooling system
System, for large-scale displacement amplitude, the latter can eliminate for sensor or for estimating the complicated approach of piston stroke
Need.
A yet further object of the present invention is to provide control method and the system of the ultimate cost for reducing compressor.
It is also an object of the invention to reduce the noise peak of compressor and improve its operational stability.
Finally, it is a further object of this invention to realize the simple solution compared with the solution of prior art,
To obtain the large-scale production of described control.
Summary of the invention
It is applicable to cooling system for realizing the mode of the target of the present invention by offer, compresses for resonant linear
The control method of machine so that such method comprises the following steps:
A) the reference operation power of described compressor is read；
B) the operation electric current of described air compressor motor is measured；
C) the operation voltage of the control module of described compressor is measured；
D) calculate as the operation electric current measured in step b) and the function operating voltage obtained in step c)
The entrance power of described air compressor motor；
E) input power calculated in abovementioned steps is compared with reference to operation power；
If f) described high than described input power with reference to operation power, then improve the operation voltage of described compressor；
If g) described low than described input power with reference to operation power, then improve the operation voltage of described compressor.
Cooling system is used, for resonance line by offer for realizing the second method of the target of the present invention
The electronic control system of property compressor, described resonant linear compressor includes motor and shift piston, the electricity of described compressor
Motivation is braked according to the operation voltage of described compressor, and described system includes being arranged to measure the electronic of described compressor
The electronic processing device of the operation electric current of machine, described processing means is configured to operate as the operation electricity of measured described motor
The function of stream provides the input power of described compressor, and this input power is compared with reference to operation performance number, institute
The difference power that the system of stating is configured to according to calculating between described input power and described reference operation power improves or drops
The operation voltage of low described compressor.
Accompanying drawing explanation
It is more fully described the present invention, in the accompanying drawings referring now to accompanying drawing:
-Fig. 1 is the schematic diagram of resonant linear compressor；
-Fig. 2 illustrates the block diagram of the control of the cooling system of the present invention；
-Fig. 3 illustrates the electronically controlled simplified block diagram of the present invention；
-Fig. 4 illustrates the block diagram by the control of the braking of inverter of the employing according to the teachings of the present invention；
-Fig. 5 illustrates the block diagram of the control using the braking by TRIAC type device；
-Fig. 6 illustrates the flow chart of the control system of the present invention；And
-Fig. 7 illustrates the waveform of the discharge pressure according to the present invention, and it identifies the power and maximum piston controlled by power
Power that displacement controls with respect to stroke and maximum piston displacement.
Detailed description of the invention
As previously mentioned, the most solutions used by control ability are by known measurement technology or stroke
The system estimated and control maximum piston displacement is combined, and regulates this displacement to work in terms of the cooling capacity of system.
Additionally, the use of position sensor is taken into account by such technology in many cases, in order to measure piston punching
Journey, therefore causes cost to significantly improve for final products.
On the other hand, do not have the solution of position sensor not have good accuracy or operational stability, and
It sometimes is necessary to use additional device, such as temperature sensor and the accelerometer for impulse detection.This structure implies
Higher costs and an equipment of longer maintenance time.
The present invention uses innovative approach and system for controlling resonant linear compressor 100, and such compressor is at Fig. 1
Middle illustrated.Described control method is preferably adapted for cooling system, and it is intended to operate according to following steps:
A) the reference operation power P of compressor 100 is readref；
B) the operation electric current i of the motor of compressor 100 is measuredMED；
C) the operation voltage of the control module of compressor 100 is measured；
D) as the operation electric current i measured in step b)MEDCount with the function of the operation voltage obtained in step c)
Calculate input power P of the motor of compressor 100MED；
E) input power P that will calculate in abovementioned stepsMEDWith reference operation power PrefRelatively；
If f) with reference to operation power PrefRatio input power PMEDHeight, then improve the operation voltage UC of compressor；
If g) with reference to operation power PrefRatio input power PMEDLow, then reduce the operation voltage UC of compressor.
Described with reference to operation power PrefOperator or user via final equipment is read or is presented to
System.It addition, operation power PrefFunction as the signal of the electronic thermostat from cooling system is calculated, as shown in Figure 2.
The block diagram of the identical control illustrating cooling system, it is indicated that the correct operation for the current object proposed is musted
Its main block wanted or operating procedure.
Fig. 3 illustrates again the block diagram more simplified, it is indicated that the steps necessary of system required for protection.
It is to be noted that this control method is the most further comprising the steps of:
H) piston displacement value D of compressor 100 is detectedpis；
I) by piston displacement DpisWith maximum displacement value DPmaxRelatively；
J) piston displacement value D is checkedpisWhether ratio maximum displacement value DPmaxHeight, and if it were to be so, then perform before
State step " d ", " e " and the sequence of " f "；And
K) piston displacement value D is checkedpisWhether ratio maximum displacement value DPmaxLow, and if it were to be so, then reduce pressure
The operation voltage UC of contracting machine.
Fig. 6 is shown in proposed control method the key step related to by means of flow chart.
Step " j " and " k " are utilized to the system predicted for protecting or detect the piston stroke limit, thus prevent from living
The plug impact to its stroke endpoint.For the application, assessment stroke has reached the maximum of the protection for system
The limit is important rather than must assess middle shift value.
Within the scope of the invention, we are also contemplated that by processing electronic installation 200 and measure the operation electric current of compressor 100
iMEDAnd calculate input power PMED。
Described electronic installation 200 operates in combination with control module or electronic power devices 300 in the teachings of the present invention
The motor of resonant linear compressor 100.
More specifically, the operation voltage UC of compressor is increased or decreased according to electronic power devices 300, the latter is inversion
Type or TRIAC type.Fig. 4 and Fig. 5 is shown for two possible embodiments of the power step of this method.
Fig. 7 illustrates again the flow chart of whole control method, contains the steps necessary of the capability control for cooling system.
Presently claimed object also predict be particularly well-suited to cooling system, for resonant linear compressor 100
Electronic control system.
Take into account the fact that resonant linear compressor 100 is included motor and shift piston by described system so that pressure
Operation voltage UC according to compressor is braked by the motor of contracting machine 100.
In a broad number of ways, the system proposed is according to the step operation of the method having been described above before.
It is to be noted that described system includes processing electronic installation 200, its electricity being arranged to measure compressor 100
The operation electric current of motivation.
On the other hand, processing means 200 is arranged to provide as the function of measured motor operation electric current
Input power P of compressor 100MED, and by this input power PMEDWith reference operation power PrefValue compares.
Consistent with the method developed, native system is arranged to according in input power PMEDWith reference operation power Pref
Between calculate difference power DifpotImprove or reduce the operation voltage UC of compressor.
The operation voltage UC of compressor is increased or decreased according to the electronic power devices 300 of inverter type or TRIAC type,
As shown in Figure 4 and Figure 5.
Preferably, process electronic installation 200 and be arranged to the digital control of whole system.
Again, it is noted that the regulation of the operation voltage UC of compressor is according to reference to operation power PrefWith input work
Rate PMEDBe relatively given.
In more detail, it is noted that when with reference to operating voltage level PrefRatio input power PMEDThe operation of compressor time high
Voltage UC is enhanced.Similarly, with reference to operation power PrefValue ratio input power PMEDUnder conditions of low, the operation electricity of compressor
Pressure UC is lowered.
It is more preferred still that the operation voltage UC of compressor is increased or decreased according to pulse width modulation controlled PWM.But, root
According to the teachings of the present invention, other kinds of control signal can be used in the case of the operation of whole system is not damaged.
In the face of above, presently claimed object comes by means of control method and the system for resonant linear compressor
Realizing target, it can eliminate to sensor or for estimating the need of the complicated approach of the piston stroke of large range displacement amplitude
Want.
Moreover, it should be noted that, in addition to reducing such as the compressor cost compared with currently available solution, this
Invention also enables us to reduce the possible noise peak of compressor, and improves its operational stability.Such stability
It is implemented such that equal-wattage is kept for same reference constant.
Finally, furthermore it should be mentioned that, according to the teachings of the present invention, the pressure peak during compressor start is lowered,
And power constant, the stroke unlike generally using before controls technology, and it produces consumption peaks and " mistake in discharge pressure
Punching ", as shown in Figure 7.It should be mentioned that may be to producing the pressure that strong noise is contributed during starting in order to reduce further
Peak value, likely introduces slope for power according to the teachings of the present invention, limits " crossing punching " in pressure further.
Being described preferred embodiment, we are it should be understood that the scope of the present invention comprises other possible changes,
The scope of the present invention is only by the content constraints of claims, and it includes possible equivalent.
Claims (10)
1. being applicable to cooling system, a control method for resonant linear compressor (100), described resonant linear is compressed
Machine (100) includes motor and shift piston, and the motor of described compressor (100) is according to the operation voltage of described compressor
(UC) it activated, in order to control the amplitude of described piston displacement, said method comprising the steps of:
A) the reference operation power (P of described compressor (100) is readref), wherein carry for described resonant linear compressor (100)
Supply and/or calculate described with reference to operation power (Pref)；
B) the operation electric current (i of the motor of described compressor (100) is measuredMED)；
Described method is characterised by, further comprising the steps of:
C) the operation voltage of the control module of described compressor (100) is measured；
D) as the operation electric current (i measured in step b)MED) and calculate in the middle function operating voltage obtained of step c)
Input power (the P of the motor of described compressor (100)MED)；
E) input power (P that will calculate in abovementioned stepsMED) operate power (P with referenceref) compare；
If it is f) described with reference to operation power (Pref) than described input power (PMED) high, then improve the operation electricity of described compressor
Pressure (UC)；
If it is g) described with reference to operation power (Pref) than described input power (PMED) low, then reduce the operation electricity of described compressor
Pressure (UC).
Control method the most according to claim 1, it is characterised in that further comprising the steps of:
H) the piston displacement value (D of described compressor (100) is detectedpis)；
I) by described piston displacement value (Dpis) and maximum displacement value (DPmax) compare；
If j) described piston displacement value (Dpis) than described maximum displacement value (DPmax) low, then perform step " e ", " f " and " g "
Sequence；
If k) described piston displacement value (Dpis) than described maximum displacement value (DPmax) high, then reduce the operation electricity of described compressor
Pressure (UC).
Control method the most according to claim 1 and 2, it is characterised in that the operation electric current of described compressor (100)
(iMED) measurement and described input power (PMED) calculating electronic installation (200) is upper to be performed processing.
Control method the most according to claim 1, it is characterised in that the operation voltage (UC) of described compressor is according to inversion
The electronic power devices (300) of type or TRIAC type is increased or decreased.
5. it is applicable to cooling system, an electronic control system for resonant linear compressor (100), described resonant linear
Compressor (100) includes motor and shift piston, and the motor of described compressor (100) is according to the operation electricity of described compressor
Pressure (UC) activated, in order to control the amplitude of described piston displacement, and described system includes processing electronic installation (200), described place
Reason electronic installation (200) is characterised by the operation electric current being arranged to measure the motor of described compressor (100), as
The function of the operation electric current of measured described motor provides the input power (P of described compressor (100)MED), and will
This input power (PMED) operate power (P with referenceref) value compares, described system is arranged to according in described input work
Rate (PMED) operate power (P with described referencerefDifference power (the D calculated between)ifpot) improve or reduce described compressor
Operation voltage (UC), wherein provides for described resonant linear compressor (100) and/or calculates described with reference to operation power (Pref)。
Electronic control system for resonant linear compressor (100) the most according to claim 5, it is characterised in that institute
The operation voltage (UC) stating compressor is increased or decreased according to the electronic power devices (300) of inverter type or TRIAC type.
Electronic control system for resonant linear compressor (100) the most according to claim 5, it is characterised in that institute
State process electronic installation (200) and be arranged to digital control.
Electronic control system for resonant linear compressor (100) the most according to claim 5, it is characterised in that when
With reference to operation power (Pref) value is than described input power (PMED) high time, the operation voltage (UC) of described compressor is enhanced.
Electronic control system for resonant linear compressor (100) the most according to claim 5, it is characterised in that when
With reference to operation power (Pref) value is than described input power (PMED) low time, the operation voltage (UC) of described compressor is lowered.
Electronic control system for resonant linear compressor (100) the most according to claim 5, it is characterised in that institute
The operation voltage (UC) stating compressor controls to be increased or decreased according to pulsewidth modulation (PWM).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BRPI1013472A BRPI1013472B1 (en) | 2010-07-14 | 2010-07-14 | control method for a resonant linear compressor and electronic control system for a resonant linear compressor applied to a refrigeration system |
| BR020100064306 | 2010-07-14 | ||
| PCT/BR2011/000223 WO2012006701A1 (en) | 2010-07-14 | 2011-07-14 | A control method for a resonant linear compressor and an electronic control system for a resonant linear compressor applied to a cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103097729A CN103097729A (en) | 2013-05-08 |
| CN103097729B true CN103097729B (en) | 2016-12-14 |
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| CN1580554A (en) * | 2003-08-04 | 2005-02-16 | 三星电子株式会社 | Linear compressor and device for controlling same |
| CN1858448A (en) * | 2005-05-06 | 2006-11-08 | Lg电子株式会社 | Apparatus and method for controlling operation of reciprocating compressor |
| CN101054969A (en) * | 2006-04-13 | 2007-10-17 | Lg电子株式会社 | Driving controlling apparatus for linear compressor and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2352533A (en) * | 1999-07-12 | 2001-01-31 | Danfoss As | Method for regulating a delivery variable of a pump |
| CN1400388A (en) * | 2001-07-31 | 2003-03-05 | Lg电子株式会社 | Stroke control mechanism and method for reciprocating compressor |
| CN1424506A (en) * | 2001-12-10 | 2003-06-18 | 松下电器产业株式会社 | Driving devices of linear compressors |
| CN1580554A (en) * | 2003-08-04 | 2005-02-16 | 三星电子株式会社 | Linear compressor and device for controlling same |
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| TR01 | Transfer of patent right |
Effective date of registration: 20190418 Address after: Brazil Joinville Patentee after: Enbraco Compressor Industry and Refrigeration Solutions Co., Ltd. Address before: Sao Paulo Patentee before: Brasil Compressores SA |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161214 Termination date: 20200714 |