CN1078341C - Method for controlling operation of compressor - Google Patents
Method for controlling operation of compressor Download PDFInfo
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- CN1078341C CN1078341C CN 93115019 CN93115019A CN1078341C CN 1078341 C CN1078341 C CN 1078341C CN 93115019 CN93115019 CN 93115019 CN 93115019 A CN93115019 A CN 93115019A CN 1078341 C CN1078341 C CN 1078341C
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- 238000000034 method Methods 0.000 title claims description 14
- 230000006698 induction Effects 0.000 claims abstract description 22
- 230000008859 change Effects 0.000 claims description 14
- 239000002826 coolant Substances 0.000 claims description 6
- 238000004378 air conditioning Methods 0.000 claims description 5
- 230000003472 neutralizing effect Effects 0.000 claims 1
- 238000005057 refrigeration Methods 0.000 abstract description 5
- 230000006837 decompression Effects 0.000 abstract 1
- 230000014509 gene expression Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 102220187649 rs145044428 Human genes 0.000 description 4
- 230000007704 transition Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
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- 230000005144 thermotropism Effects 0.000 description 1
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Abstract
When an induction motor of a compressor is driven in an inverter mode, the high operation efficiency of the induction motor is promoted according to a load state. A compressor, a condenser, a decompression device and an evaporator are used for forming a refrigeration cycle. The frequency of alternating current of the induction motor arranged in the compressor is randomly changed, and the supply of the alternating current of the induction motor is used as a rotary source. Whether a load of the refrigeration cycle meets a scheduled condition or not is judged. When the load of the refrigeration cycle meets the scheduled condition, the certain frequency of the alternating current is kept, and voltage generated by the alternating current in the induction motor is adjusted.
Description
The present invention relates to a kind of method for controlling of operation of compressor, particularly relate to making and be contained in the induction conductivity that is used for freeze cycle in the air-conditioner etc. method for controlling of operation with the good efficiencies running as the driven compressor source.
In the prior art, majority be contained in compressor in the air-conditioner induction conductivity as rotary driving source, be known with this running control of inverter mode.In this inverter mode, control the revolution (ability) of compressor by the ac frequency F that change to supply with induction conductivity, and obtain cooperating the running ability of the load size of freeze cycle.At this moment, the voltage V of alternating current (when using PWM mode DC-to-AC converter, the aanalogvoltage that in the induction conductivity stator coil, produces), though its frequency F adjusts according to load, the ratio of V/F is generally certain and preestablishes like that.
Particularly, in the DC-to-AC converter of PWM mode, the on/off characteristic curve according to frequency F preestablishes switch element generally is stored among the ROM.Because be subjected to be stored in the characteristic quantitative limitation of on/off among this ROM, the value of voltage V is set like that and is stored with frequency F is corresponding one by one, has just reduced the use amount of ROM.
In the method for controlling of operation of above-mentioned existing compressor, the ratio of V/F is generally certain, but owing to be the mode of controlled frequency F, feel load change and more the highland set V/F value, prevent compressor stall when increasing the direction variation to load.Thereby there is the low problem of running efficiency in nature when load is light.
In order to get rid of the low of this running efficiency, obtain the power factor of the alternating current of supplying with induction conductivity, and be Control of Voltage to make the highest measure of this power factor disclose (opening clear 61-No. 20236 communiques) with reference to the spy.
But, under the situation of the control method of trying to achieve this AC power, in case have distortion (the particularly distortion that is caused by higher hamonic wave) in the AC wave shape of supplying with motor, the accuracy of detection of power factor is just extremely low, just can not improve running efficiency fully.
Promptly, during the analog sine that forms by inverter circuit (according to the resulting AC wave shape of the theoretical switch DC voltage of PWM) supply motor, inductance by stator coils of motor makes analog sine to a certain degree level and smooth, but, will cause the problem that such as mentioned above accuracy of detection is low owing to still also have distortion in the current waveform.Particularly the aberration rate of waveform becomes very big in the motor (below several kilowatts) of little output, makes above-mentioned problem become more remarkable.
Therefore, detect revolutional slip from the current waveform that flows through motor, make this revolutional slip become predetermined value and control terminal voltage of motor like that, the measure of this raising running efficiency is known (opening flat 4-33584 communique referring to the spy).And the more little running efficiency of revolutional slip is just high more.
But in case still have above-mentioned distortion in the current waveform in this case, the accuracy of detection of revolutional slip will produce deviation, and it is unstable that the control of terminal voltage just becomes.Suppose by the circuit capacity that improves testing circuit and suppress to a certain extent to detect deviation, but testing circuit will significantly become complicated, the cost of this part rises significantly.
In view of such problems of the prior art, main purpose of the present invention provides a kind of method for controlling of operation that can be energy-conservation, its frequency F is remained on certain going up finely tune the voltage V that supplies with compressor according to the operating condition of air-conditioner, improves running efficiency.
To achieve these goals, method for controlling of operation according to a kind of compressor of compressor of the present invention, this method is in the freeze cycle that constitutes with coolant compressor, condenser, decompressor and evaporimeter, be used to change supply as the rotary driving source of above-mentioned compressor and the ac frequency and the voltage corresponding to the load of freeze cycle of the induction conductivity of installing, to carry out the running control of compressor, make the room temperature of air conditioning chamber reach setting value, it is characterized in that
Whether the load of judging above-mentioned freeze cycle is in the scope of predetermined loading condition, when load is not in predetermined scope, change the frequency of alternating current and the control of voltage, and in loading on predetermined scope the time, then do not change the frequency of above-mentioned alternating current and reduce the voltage of alternating current gradually.
And be further characterized in that above-mentioned scope is: above-mentioned ac frequency is in preset range, and the electric current of above-mentioned alternating current is below predetermined value, and the space temperature when carrying out the air-conditioning of predetermined space by above-mentioned freeze cycle is below setting value.
According to the present invention, according to the frequency of the size adjustment alternating current of load, the ability of control compressor.On the one hand, (for example ac frequency is in preset range, and electric current is below setting value, and the room temperature when carrying out air-conditioning is following in setting value) still keeps frequency necessarily suitably to reduce voltage when load is light.Thus, the slip of adjusting induction conductivity reduces current value, and becomes the high efficiency running.
Fig. 1 is the block diagram of the air conditioner that relates to of one embodiment of the invention;
Fig. 2 is the schematic circuit diagram of expression inverter circuit;
Fig. 3 is the figure of explanation switching signal generating principle;
Fig. 4 is the figure that the variation of the switching signal that makes the modulating wave amplitude variations is described;
Fig. 5 is the block diagram of the switching signal generative circuit in the expression microprocessor;
Fig. 6 is expression frequency instruction value f, the flow chart of the change setting of voltage instruction value V;
Fig. 7 is the figure of the sinusoidal wave data in the expression storage area;
Fig. 8 is that microprocessor carries out the flow chart that voltage trim is handled;
Fig. 9 represents the curve map of the relation of frequency setting scope and current setting value;
The curve map of the revolution electric current difference when Figure 10 is the control of expression voltage trim of the present invention when not carrying out above-mentioned control.
Among the figure, the 1st, induced electricity association machine;
The 5th, compressor;
The 6th, this part of compressor;
The 24th, the heat source side heat exchanger;
25-27 is capillaries;
The 29th, utilize the side heat exchanger;
The 39th, microprocessor;
The 40th, inverter circuit.
One embodiment of the invention are described below with reference to the accompanying drawings.This embodiment is contained in situation in the air conditioner to the freeze cycle of use compressor.
Fig. 1 is the schematic diagram of the air conditioner that relates to of present embodiment.Among the figure, label 5 expression hermetic type compressors.But form by this part of compressor 6 of medium and the three-phase alternating-current induction motor 1 that rotation drives this this part of compressor 6 by compression refrigeration for this compressor 5.Label 23 is four-way switching valves, the 24th, and the heat source side heat exchanger, 25-27 is decompressor (for example capillaries), the 28th, filter, the 29th, utilize the side heat exchanger, and 30 is storage heaters.These parts connect by the cooling medium pipeline, constitute freeze cycle.
When four-way switching valve 23 is in switching position shown in Figure 1, pressing the solid arrow direction from the compression cooling medium of compressor 5 discharges flows, heat source side heat exchanger 24 is as the function of condenser, and, utilize the function of side heat exchanger 29 as evaporimeter, therefore, use utilizes side heat exchanger 29 just can utilize moving as indoor cool room of side.Once four-way switching valve 23 switches to the dotted line place, pressing the dotted arrow direction from the compression cooling medium of compressor 5 discharges flows, at this moment, utilize the function of side heat exchanger 29 as condenser, and, heat source side heat exchanger 24 is as the function of evaporimeter, therefore by utilizing side heat exchanger 29 just can carry out indoor warm room running.
Number in the figure 31,32nd, muffler, the 33rd, be used for the propeller type fan that thermotropism source heat exchanger 24 is blown, drive by motor 30.The 35th,, drive by utilizing side heat exchanger 29 to carry out the cross flow fan of the adjusting air of heat exchange (heating/cooling) to indoor supply by motor 36.
Label 370 expression indoor units are installed with in this indoor unit 370 and utilize side heat exchanger 29, cross flow fan 35, motor 36, indoor control part 37 etc.In addition machine is installed in the outdoor unit 371.Between outdoor unit 371 and indoor unit 370, be connected with holding wire by the cooling medium pipeline.
Indoor unit 370 will comprise that control supplies with the signal, the signal that running control is configured in the machine in the outdoor unit 371 of ac frequency F of the motor 1 of compressor 5 and export to outdoor unit 371.From the signal of indoor unit 370, in outdoor unit 371, at first import by interface 38, offer microprocessor 39 as control part.
Microprocessor 39 simultaneously, is formed for obtaining according to the PWM theory switching signal of analog sine according to the running of input signal control outdoor unit 371.Formation for this switching signal will be described in the back.The switching signal that is formed by microprocessor 39 offers inverter circuit 40 by the amplifier 41 that is used for switch.
The direct current of supplying with inverter circuit 40 obtains from AC power 42.That is, the single phase ac of AC power 42 is carried out voltage multiplying rectifier and produced direct current.Voltage multiplying rectifier is undertaken by rectifier cell 43 and smmothing capacitor 44,45.Among Fig. 1, label 46 is the smmothing capacitors behind the voltage multiplying rectifier, the 47th, and choke coil, the 48, the 49th, muffler, 50,51st, current fuse, reaching 52 is nonlinear resistances.
Fig. 3 is that expression is carried out the schematic diagram that switching signal generates by microprocessor 39, is the example of expression when obtaining on/off signal (switching signal) by switch element X, X shown in Figure 2.The on/off signal of switch element X is the on/off signals reverse with switch element X.
At the epimere of Fig. 3, a kind of waveform CO represents carrier wave (for example triangular wave, stepped triangular wave, spacing ripple), and another kind of waveform MO represents that modulating wave is (for example sinusoidal wave; Stepped sine wave).The amplitude of carrier wave CO and modulating wave MO size decision on/off signal SO when modulating wave MO＞carrier wave CO, is on/off signal SO=ON.The frequency of carrier wave CO, modulating wave MO and frequency ratio are not to only limit to diagram like that, and Fig. 3 is the frequency of understanding easily as when illustrating.
Switch element Y and on/off signal, phase angle 120 degree of the modulating wave MO of leading Fig. 3 are generated by the amplitude ratio of modulating wave MO and carrier wave CO.The switching signal of switch element Y is oppositely obtaining switch member Y.The on/off signal of switch element Z, modulating wave MO phase angle 120 degree of hysteresis Fig. 3 is generated by the amplitude ratio of modulating wave MO and carrier wave CO.The on/off signal of switch element Z is oppositely obtaining switch element Z.
In case this on/off signal (switching signal) is supplied with inverter circuit 40, make the direct current on/off by switch element X, X, Y, Y, Z, Z with the characteristic curve identical, and generate analog sine with the dutycycle of this on/off signal.Because cycle of modulating wave MO is corresponding to analog sine wave frequency F, just can change analog sine wave frequency F by the cycle that changes modulating wave MO.Through reducing the cycle of carrier wave CO,, improved the resolution ratio of analog sine owing to increased the on/off number of times in 1 cycle in analog sine.In Fig. 3, represented to increase the carrier frequency that is used to illustrate.
Fig. 4 is illustrated in the variation of the on/off signal when changing the modulating wave amplitude.In case strengthen the modulating wave amplitude from M0 to M1, analog sine becomes the S1 state from S0, aanalogvoltage (terminal voltage the when electric current of analog sine flows through induction conductivity in the calculating of representing on the magnet exciting coil two ends) uprises.It is big that the difference of maximum ON time and minimum ON time becomes, and this aanalogvoltage uprises.From M0 to M2, analog sine becomes the state of S2, the aanalogvoltage step-down in case the modulating wave amplitude diminishes.
Like this, just the three-phase alternating voltage of supplying with induction conductivity 1 can be changed, just the three-phase alternating current frequency can be changed by changing the modulation wave frequency by changing the modulating wave amplitude.
Fig. 5 is the microprocessor 39 major part frame circuit diagrams that are used to generate on/off signal (switching signal).Among the figure, label 60 is UP/DOWN counters of 16bit.This counter 60 carries out the add operation of count value synchronously with clock, in case count value reaches FFFH just carries out count value synchronously with clock subtraction, in case count value reaches the add operation that OH changes to count value once more, later repeated addition computing and subtraction.Like this, the output of this counter 60 (count value) changes with triangular wave (carrier wave) shape.
In case, handle and just carry out step S13, the sinusoidal wave data in the rewriting storage area in the change that step S12 has judged frequency instruction value f or voltage instruction value v.At this moment, sinusoidal wave data be multiply by predetermined v value and revise sinusoidal wave data.Sinusoidal wave data in sine wave 84-86 expression storage areas of Fig. 7.Sinusoidal wave 84 is f=10, the first-harmonic of v=1.00, and the value between the C0-C10 of address changes like that as shown and is stored.Sinusoidal wave 85 is f=10, the sinusoidal wave data during v=0.66, and sinusoidal wave 86 is f=20, the sinusoidal wave data during v=1.00.C10, the value of C20 is determined by employed clock frequency.For example, when using the clock of 100KHz, be C10=10000, C20=5000.
Sinusoidal wave (1/2 cycle), 80,82,83 representatives were stored in the value (OH-FFFFH) of the sinusoidal wave data in the storage part 62.Pitch with 0.1Hz in this storage part 62 is stored sinusoidal wave data.F10, f15, f20 represent the initial of sinusoidal wave data respectively.It is big that the amplitude of these sinusoidal wave datas becomes along with frequency gets higher.That is, be set at necessarily for predetermined load v/f.
For example, value=FFFFH/2 of sinusoidal wave 84 ± (sinusoidal wave 80 values)/2, sinusoidal wave 85 value=FFFFH/2 ± 0.66 * (sinusoidal wave 80 values)/2.Can obtain other sine waves equally.That is,, just can in the step S13 of Fig. 6, rewrite the sinusoidal wave data in the storage area if obtain frequency instruction value f and voltage instruction value v.
And, in Fig. 6, in order to make explanation easily be expressed as for 1/2 cycle to sinusoidal wave 80,82,83, but much less, also be good for the occupancy that reduces storage part became for 1/4 cycle.
The label 63 of Fig. 5 is represented the distributor of sinusoidal wave number, generates the deviate of per 120 degree phase places.For example, at f=10, during v=1.00 (sine wave 84 shown in Figure 7), the length in 1 cycle is: 0-C10 (10000).The deviation post 0 of 120 degree phase places, the stepping position of C10/3=3333, C10 * 2/3=6666.
Like this, in case being subtracted, basic counting becomes C (driving) by clock, CX=C is just arranged (at 0≤C≤C10=10000, during C=C10+1, C=0), CY=CX+C10/3 (when CY＞C10=10000, CY=CX+C10/3-C10=CX+3333-10000), CZ=CX+C10 * 2/3 (when CZ＞C10=10000, CZ=CX+C10 * 2/3-C10=CX+6666-10000).
Corresponding to the sinusoidal wave number of this count value CX, CY, CZ value corresponding to sine wave shown in Figure 7 84.The variation of the value of the sine wave when thus, changing the value of counting C becomes waveform shown in Figure 5 64,65,66.This waveform 64-66 is removed 120 degree on phase place.
For the sine wave 84-86 of Fig. 7 for the purpose of the easy explanation was expressed as for 1 cycle, but also can be kept to for 1/4 cycle for the occupancy that reduces storage part.
Like this,, just can obtain the value of the three-phase sine-wave of mutual phase deviation 120 degree of voltage V by frequency F if frequency instruction value f and voltage instruction value v are provided.
In Fig. 5, label 67-69 expressions are the comparator of numerical values recited relatively.The value of the triangular wave (carrier wave) that this comparison 67-69 is relatively supplied with by UP/DOMN counter 60 and by the size of the value of the sine wave shown in the waveform 64-66 (modulating wave) is output as logical (H level voltage) during greater than the value of carrier wave in the value of modulating wave.The output of this comparator 67-69 provides respectively as switch element X, Y shown in Figure 2, the switching signal of Z (on/off signal).
70-72 of Fig. 5 is phase inverters, exporting paraphase and become switch element X, Y, the switching signal of Z (on/off signal) from the on/off of comparator 67-69.Becoming switch element X～Z, under the time delay of the on/off of X～Z (particularly logical → disconnected) the bigger situation, switch element inserts delay circuit in the circuit that the on/off signal is provided (become at signal disconnected → when logical, make the circuit of this variation with predetermined time delay).Preferably adopt: the value that offers comparator 67-69 is carried out the D/A conversion as analog voltage level, in comparator, compare the size of aanalogvoltage.
Like this, in case give the sinusoidal wave control part 61 of microprocessor 39 frequency instruction value f and voltage instruction value v (1.00-0.50 scope) instruction, just can obtain the alternating current of corresponding desired frequency F of and instruction value f, v and amplitude (voltage) V.
Fig. 8 represents that (wherein, with the ratio of " V/F " expression voltage V with frequency F) control is to be handled by microprocessor 39 according to load condition fine setting index F0.Indoor control part 37 by indoor unit 370 is obtained frequency instruction value according to load, sends microprocessor 39 to.
At first, in step S21, carry out the initialization of microprocessor 39, simultaneously, voltage instruction value v is initially set index F0=V/F=60.This index F0=V/F=60 with nominal load (an indeclinable fixed load) drive compression machine the time, the running efficiency of compressor is to be best setting value.
Carry out the transition to step S22 then, input is from the frequency instruction value f and all temps T (external air temperature, heat exchanger temperature etc.) of indoor unit 370.
In step S23, carry out the control of other machines according to signal of in step S22, being imported etc. then.For example, carry out the switching controls of cross valve 23, the running of motor 34, the defrosting control of outdoor heat exchanger 24 etc.
Then, in step S24, the alternating current flow valuve I that input C.T.53 detects, and in step S25, input external air temperature when cool room, input indoor heat converter temperature T when heat rooms.And, omitted the diagram of temperature sensor.After this, order is carried out the judgement of step S26-S28.Whether determination frequency command value f enters in the preset range of frequency F in step S26 at first.In present embodiment, as shown in Figure 9, be set at F=15～80Hz as this frequency range.Thus, when frequency instruction value f does not enter this scope, be the judgement of NO, and be the judgement of YES when entering, enter step S27 then.The said frequencies scope is not to only limit to F=15～80Hz.The reason that limits such frequency is to strengthen the situation of the eliminating volume of compressor for the capacity variation scope that obtains designing.The running ability of compressor gets rid of volume by this and the long-pending of frequency determines.If it is less to get rid of volume, just must improve frequency in order to obtain required maximum capacity.But generally getting rid of capacious compressor just has the problem that can not improve its textural frequency.
In step S27, judge that the current value I read in is whether below setting value in step S24.Decide current setting value according to frequency F shown in Figure 9, specifically be, determined by the different straight line of 2 slope over 10 of the high frequency side of lower frequency side and 50Hz≤F≤80Hz of 15Hz≤F≤50Hz.For example, at F=15Hz, current setting value=I15 then, at F=50Hz, then current setting value=I50, at F=80Hz, current setting value=I80 then.In the middle of them, be the value that determines by each straight line.Why setting current setting value like this, is promptly high or low for the load of its ability for determination frequency, and this current value is the current value in the calculating of being circulated under the situation of the adaptability load when its frequency.The lower frequency side, the high frequency side that why this setting value are divided into frequency are because the electric current can not make this adaptability load in Zone Full the time is a linearization(-sation).The frequency one current value data that are equivalent to broken line curve map shown in Figure 9 are stored in as in the microprocessor 39 of checking data.
By the judgement of this step S27,, carry out the transition to step 28 in case the present electric current I of supplying with, just becomes YES and judges below the setting value at it.
In step S28, judge that the temperature T read in is whether below setting value in step S25.If 46 ℃ (indoor heat converter temperature) just need not limit and be necessary for this numerical value as this design temperature when adopting 36 ℃ (outside air temperature) when for example freezing, heating.Why like this limiting temperature be because: load became big when outside air temperature was high, just must improve voltage, and during indoor heat converter temperature step-down, load is big.
At above-mentioned steps S26-S28 is under the NO situation about judging, just needn't F0 described later (=V/F) fine setting is controlled, and gets back to step S22.
On the one hand, supply with the F0 that sinusoidal wave control 61 sets at this moment corresponding to the processing by Fig. 8 (=V/F) frequency instruction value f and voltage instruction value v by microprocessor 39.
Thus, under the situation that the NO of step S26-S28 judges, (=V/F)=60 frequency instruction value f and voltage instruction value v are provided for the sinusoidal wave control part 61 in the microprocessor 39 corresponding to the F0 of initial setting.Thus, in sinusoidal wave control part 61, generated the on/off signal of three-phase alternating current of required frequency, the voltage of be used to meet with a response command value f, v.By the switch element of this on/off signal switching driving inverter circuit 40, the three-phase alternating current according to this analog sine is supplied with induction conductivity 1.The frequency F of this three-phase alternating current is kept to the value of being instructed by command value f, and the terminal voltage V of induction conductivity 1 becomes the value of being instructed by command value v.Thus, air conditioner carries out the refrigeration of being instructed with command value f, v or adds heat run.
To this, when judging for YES in step S28, frequency range, electric current and temperature all are to satisfy the situation of predetermined condition, in case this state is identified, microprocessor 39 carries out the following F0 of step S29 (=V/F) trim process.
In step S29, according to the present current value I now of detection signal input of C.T.53.Then in step S30, carry out 2 steps improve F0 (=F/V) (for voltage V, reduce) setting of such change voltage instruction value v.Wherein, improve F0 (=V/F) wide being not limited to for 2 steps of step corresponding to reducing voltage V direction.
In case finely tune F0 on the direction that reduces voltage V, the voltage instruction value v that supplies with sinusoidal wave control part 61 descends (frequency instruction value f is constant), and in this case, the switching signal dutycycle of supplying with inverter circuit 40 changes a little.Thus, the aanalogvoltage of supplying with induction conductivity descends, because revolutional slip is finely tuned minutely, can control near the high efficiency running in the constant frequency of corresponding light condition.
In step S31, carry out standby in 10 seconds then in order to confirm the current status behind the 2 steps raising F0.This stand-by time is not limited in 10 seconds.After this standby, the detection signal of C.T.53 reads in current value I next at this moment once more in step S32.
In step S33, carry out the whether judgement of Inow-Inext 〉=0.When becoming YES by this judgement, improve F0 (reducing voltage V) by 2 steps and reduce current value, towards energy-saving operation, return step S22, repeat above-mentioned processing.
But,, when becoming NO and judge, will be appreciated that by the control that carries out the transition to the former of heavy duty etc. thereby reduce voltage V a little be invalid though 2 steps were improved F0 (reducing voltage V).At this moment, in step S34, carried out for 3 steps and reduce the F0 (=V/F) setting of (is to raise to voltage V) such change voltage instruction value v.Wide being not limited to for 3 steps of this reduction step.
Reduce the adjustment of (is to improve to voltage) by this step, improve F0 with the front and compare, F0 becomes 1 step decline (is to improve to voltage V), adjusts F0 towards the value that increases corresponding to load.After this, in step S35, carry out standby in 10 seconds, return step S22 for the trend of reaffirming load.
By above such processing, satisfy so-called operating frequency in setting range, compressor current is when following and outside air temperature is in the following predetermined condition of setting value in setting value, (=V/F) interior frequency F remains necessarily trim voltage V to index F0.Thus, change the motor slip of compressor, keep same number of revolutions, owing to can carry out energy-saving operation, just reduced power consumption, just can improve running efficiency, when carrying out this fine setting control, do not need special hardware configuration,, improved versatility owing to can utilize available circuit.
In Figure 10, the data (but when cooling operation) that the situation of above-mentioned voltage trim control is compared with the situation of not carrying out above-mentioned control are carried out in expression.As shown in the drawingly like that the situation of finely tuning control (by shown in the circle such) is compared with the situation (shown in stain) of not carrying out above-mentioned control, can see that revolution electric current has significantly reduced in the scope of frequency 15～80Hz.
As above-mentioned, according to the compressor operation control method that the present invention relates to, when satisfying the predetermined condition of load when low weight (AC current frequency in preset range, above-mentioned alternating current below setting value, and, room temperature is below setting value when carrying out air-conditioning by above-mentioned freeze cycle), holding frequency is certain, suitably is reduced in the voltage that produces in the induction conductivity, adjusts the revolutional slip of induction conductivity, reduce current value, and become high efficiency running.
Claims (2)
1. the method for controlling of operation of a compressor, this method is in the freeze cycle that constitutes with coolant compressor, condenser, decompressor and evaporimeter, be used to change supply as the rotary driving source of above-mentioned compressor and the ac frequency and the voltage corresponding to the load of freeze cycle of the induction conductivity of installing, to carry out the running control of compressor, make the room temperature of air conditioning chamber reach setting value, it is characterized in that
Whether the load of judging above-mentioned freeze cycle is in the scope of predetermined loading condition, when load is not in predetermined scope, change the frequency of alternating current and the control of voltage, and in loading on predetermined scope the time, then do not change the frequency of above-mentioned alternating current and reduce the voltage of alternating current gradually.
2. the method for controlling of operation of compressor as claimed in claim 1, it is characterized in that, the scope of described loading condition is to supply with the frequency of the alternating current of neutralizing the machine driven induction motor that contracts in the scope of setting, the electric current of described alternating current is below setting value, and, the scope of the space temperature when adjustment is carried out in deciding space below setting value by above-mentioned freeze cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93115019 CN1078341C (en) | 1993-10-15 | 1993-10-15 | Method for controlling operation of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93115019 CN1078341C (en) | 1993-10-15 | 1993-10-15 | Method for controlling operation of compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1101710A CN1101710A (en) | 1995-04-19 |
| CN1078341C true CN1078341C (en) | 2002-01-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93115019 Expired - Fee Related CN1078341C (en) | 1993-10-15 | 1993-10-15 | Method for controlling operation of compressor |
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| Country | Link |
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| CN (1) | CN1078341C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412464C (en) * | 2003-03-17 | 2008-08-20 | 松下电器产业株式会社 | air conditioner |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375881C (en) * | 2003-05-22 | 2008-03-19 | 乐金电子(天津)电器有限公司 | Apparatus and method for controlling operation of electric refrigerator utilizing forward or backward rotary compressor |
| JP4949768B2 (en) * | 2006-08-10 | 2012-06-13 | 日立アプライアンス株式会社 | Screw compressor |
| EP3001121B1 (en) * | 2013-05-23 | 2020-10-14 | Mitsubishi Electric Corporation | Heat pump device |
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1993
- 1993-10-15 CN CN 93115019 patent/CN1078341C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100412464C (en) * | 2003-03-17 | 2008-08-20 | 松下电器产业株式会社 | air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1101710A (en) | 1995-04-19 |
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Granted publication date: 20020123 Termination date: 20101015 |