Summary of the invention
Main purpose of the present invention is to provide a kind of frequency-changeable compressor control method and refrigerator, is intended to solve compressor rotary speed and controls higher or on the low side, so cause that noise is higher, energy waste or the low technical problem of refrigerating efficiency.
For achieving the above object, a kind of frequency-changeable compressor control method provided by the invention, comprising:
When needs carry out compressor rotary speed adjustment, the mean value of the Homes Using TV of the compressor that each start-stop cycle before the adjustment of described compressor rotary speed that calculates is corresponding, obtains average Homes Using TV;
According to described average Homes Using TV and the default compressor target Homes Using TV corresponding with current environmental temperature, calculate the resize ratio of compressor rotary speed;
According to the rotating speed of the compressor in the last start-stop cycle when resize ratio of described compressor rotary speed and the adjustment of described compressor rotary speed, calculate the rotating speed after the adjustment of described compressor;
According to the rotating speed after described compressor adjustment, control described compressor operating.
Preferably, described frequency-changeable compressor control method also comprises:
When described compressor is started shooting first after defrost terminates, the last compressor rotary speed in start-stop cycle and the resize ratio of compressor rotary speed when starting according to defrost, calculate compressor rotary speed when described compressor is started shooting first after defrost terminates, and according to this compressor rotary speed, control described compressor operating.
Preferably, described frequency-changeable compressor control method also comprises:
If described compressor continuous running time t1be more than or equal to preset duration t2, then according to rotating speed, the continuous running time t of current compressor1, preset duration t2and preset the first adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
Preferably, described frequency-changeable compressor control method also comprises:
If the temperature gap Q between current environmental temperature and the target temperature preset1be greater than preset temperature Q2, then according to the rotating speed of current compressor, temperature gap Q between current environmental temperature and the target temperature preset1, preset temperature Q2and preset the second adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
Preferably, when needs carry out compressor rotary speed adjustment, the mean value of the Homes Using TV of the compressor that each start-stop cycle before the adjustment of described compressor rotary speed that calculates is corresponding, comprises before obtaining average Homes Using TV:
When compressor powers on first, run M start-stop cycle continuously with the preset rotation speed that current environmental temperature is corresponding;
Calculate the Homes Using TV in M start-stop cycle;
According to Homes Using TV and the default compressor target Homes Using TV corresponding with current environmental temperature in described M start-stop cycle, calculate the resize ratio of compressor rotary speed;
According to the resize ratio of described compressor rotary speed and the rotating speed of the compressor in described M start-stop cycle, calculate the rotating speed after the adjustment of described compressor, and the start-stop cycle of described compressor is counted again, and the rotating speed after the adjustment of this compressor again count as start-stop cycle of described compressor after initial speed.
Preferably, adjust if meet rotating speed in described compressor operating process, then duration timing from the interim time adjustment of rotating speed of starting shooting in corresponding described Homes Using TV temporarily.
For achieving the above object, the present invention also provides a kind of refrigerator, and described refrigerator comprises the frequency-converting control device of compressor, and the frequency-converting control device of described compressor comprises:
Average Homes Using TV obtains module, and during for carrying out compressor rotary speed adjustment at needs, the mean value of the Homes Using TV of the compressor that each start-stop cycle before the adjustment of described compressor rotary speed that calculates is corresponding, obtains average Homes Using TV;
Compressor rotary speed resize ratio computing module, for according to described average Homes Using TV and the default compressor target Homes Using TV corresponding with current environmental temperature, calculates the resize ratio of compressor rotary speed;
First compressor rotary speed computing module, for the rotating speed of the compressor according to the last start-stop cycle when resize ratio of described compressor rotary speed and the adjustment of described compressor rotary speed, calculates the rotating speed after the adjustment of described compressor;
Compressor rotary speed control module, for according to the rotating speed after described compressor adjustment, controls described compressor operating.
Preferably, the frequency-converting control device of described compressor also comprises:
Second compressor rotary speed computing module, for when described compressor is started shooting first after defrost terminates, the last compressor rotary speed in start-stop cycle and the resize ratio of compressor rotary speed when starting according to defrost, calculate compressor rotary speed when described compressor is started shooting first after defrost terminates, and according to this compressor rotary speed, control described compressor operating.
Preferably, the frequency-converting control device of described compressor also comprises:
3rd compressor rotary speed computing module, if for described compressor continuous running time t1be more than or equal to preset duration t2, then according to rotating speed, the continuous running time t of current compressor1, preset duration t2and preset the first adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
Preferably, the frequency-converting control device of described compressor also comprises:
4th compressor rotary speed computing module, if for the temperature gap Q between current environmental temperature and the target temperature preset1be greater than preset temperature Q2, then according to the rotating speed of current compressor, temperature gap Q between current environmental temperature and the target temperature preset1, preset temperature Q2and preset the second adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
Preferably, the frequency-converting control device of described compressor also comprises:
Initial speed runs module, when powering on first for compressor, runs M start-stop cycle continuously with the preset rotation speed that current environmental temperature is corresponding;
Initial Homes Using TV computing module, for calculating the Homes Using TV in M start-stop cycle;
The initial resize ratio computing module of compressor rotary speed, for according to the Homes Using TV in described M start-stop cycle and the default compressor target Homes Using TV corresponding with current environmental temperature, calculates the resize ratio of compressor rotary speed;
The adjustment of compressor initial speed and control module, for according to the resize ratio of described compressor rotary speed and the rotating speed of the compressor in described M start-stop cycle, calculate the rotating speed after the adjustment of described compressor, and the start-stop cycle of described compressor is counted again, and the rotating speed after the adjustment of this compressor again count as start-stop cycle of described compressor after initial speed.
Preferably, adjust if meet rotating speed in described compressor operating process, then duration timing from the interim time adjustment of rotating speed of starting shooting in corresponding described Homes Using TV temporarily.
The present invention as the adjustment aim of compressor rotary speed, by calculating the resize ratio obtaining compressor rotary speed, thus realizes the adjustment to the current rotating speed of compressor using the best Homes Using TV of the compressor preset.The present invention, according to the actual start-stop situation of compressor, makes refrigeration plant in running, constantly the rotating speed of adjustment press, until reach desired operation, thus the beneficial effect realizing reducing noise, save the energy.Meanwhile, the present invention gives full play to the advantage of frequency-changeable compressor variable speed, has considered multiple frequency-changeable compressor rotation speed regulating method in particular cases, has improve the adaptive capacity of compressor in actual environment.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Core concept of the present invention is: the optimum target Homes Using TV presetting compressor under different condition; and in refrigeration plant running; frequency-changeable compressor with optimum target Homes Using TV for target; according to the actual startup-shutdown situation of compressor; the rotating speed of continuous adjustment frequency-changeable compressor, until reach desired operation.Core concept of the present invention can be used for the various refrigeration plants with frequency-changeable compressor, be specifically described with the refrigerator citing with frequency-changeable compressor in the present invention, but the present invention is not limited to refrigerator.
In the present invention, the start-stop cycle of compressor refers to the once start duration of compressor and shuts down duration sum, and also namely this available machine time of compressor puts the duration between available machine time next time point.Therefore, in the present invention, the duration in each start-stop cycle might not be equal.
Homes Using TV=start duration/start-stop the cycle in compressor start-stop cycle, that is:
η=topen/ tweekformula (1-1);
Wherein, η is Homes Using TV, topenfor start duration, tweekfor the start-stop cycle.
With reference to the schematic flow sheet that Fig. 1, Fig. 1 are frequency-changeable compressor control method first embodiment of the present invention.In the present embodiment, frequency-changeable compressor control method comprises:
Step S110, when needs carry out compressor rotary speed adjustment, the mean value of the Homes Using TV of the compressor that each start-stop cycle before the adjustment of described compressor rotary speed that calculates is corresponding, obtains average Homes Using TV;
In the present embodiment, it is initial with this start-stop week that the adjustment of the rotating speed of compressor occurs in an end of term in start-stop week, is also that the adjustment of the rotating speed of compressor is after compressor shutdown and at upper advance Row sum-equal matrix of once starting shooting.In each start-stop cycle of compressor operating, the start duration in each start-stop cycle and shutdown duration will be recorded.When needing to adjust the rotating speed of compressor, the mean value of the Homes Using TV of the compressor first needing each start-stop cycle before first calculating the adjustment of described compressor rotary speed corresponding, to obtain average Homes Using TV.
The number in the Homes Using TV sum/start-stop cycle of the compressor that average Homes Using TV=each start-stop cycle is corresponding, that is:
ηn puts down=(η1+ η2+ ... + ηn-2+ ηn-1)/(n-1) formula (1-2);
Wherein, n be more than or equal to 2 positive integer, ηn puts downfor the mean value of the Homes Using TV in n-1 start-stop cycle before when compressor during n-th time of compressor stable operation stage start carries out adjustment of rotational speed; η1, η2... ηn-2, ηn-1respectively the Homes Using TV in the 1st start-stop cycle of corresponding compressor stable operation stage, the 2nd start-stop cycle Homes Using TV ... the Homes Using TV in the n-th-2 start-stop cycle, the Homes Using TV in the (n-1)th start-stop cycle, and the computational methods of above each Homes Using TV all can refer to formula (1-1).It should be noted that, the 1st start-stop cycle in formula (1-2) is not first start-stop cycle that finger pressure contracting prow powers on when starting shooting, and enters into first start-stop cycle during stable operation stage after start also runs one or more start-stop cycle continuously but compressor powers on first.In general, compressor power on first start time all can first prerun multiple start-stop cycle, and then enter stable operation stage and the start-stop cycle needs again to count.The adjustment of compressor rotary speed needs the Homes Using TV with reference to each start-stop cycle above, the adjustment of compressor rotary speed carries out on the basis of original rotating speed, therefore, compressor powers on when start runs first does not need to carry out the adjustment of rotating speed, and the adjustment of compressor rotary speed generally occurs in after compressor enters stable operation stage.The determination mode of the rotating speed that compressor powers on when starting shooting operation first has a lot, such as, directly presets initial speed, or determines according to current environmental temperature.
Step S120, according to described average Homes Using TV and the default compressor target Homes Using TV corresponding with current environmental temperature, calculates the resize ratio of compressor rotary speed;
In the present invention, compressor is with target Homes Using TV for target, according to the actual startup-shutdown situation of compressor, and the adjustment that the resize ratio calculating compressor rotary speed realizes compressor rotary speed with this.
See table 1, table 1 is the compressor target Homes Using TV that in the present invention, frequency conversion refrigerator is corresponding under various environment temperature.
Table 1
Under each environment temperature, compressor is bound to, to there being a best target Homes Using TV, if compressor runs with this target Homes Using TV, then at utmost reducing the noise of compressor, also at utmost save electric energy simultaneously.In the present embodiment, in the process of compressor operating, the control system of refrigerator can detect the ambient temperature value Th of each refrigeration compartment that current each refrigeration compartment temperature sensor obtains in real time, thus compressor target Homes Using TV η i corresponding current environmental temperature can be got when compressor carries out adjustment of rotational speed under.Compressor target Homes Using TV η i is the optimum empirical value calculating the compressor that draws corresponding Homes Using TV at different ambient temperatures according to reality.In Table 1, compressor target Homes Using TV η 1, η 2, η 3, η 4, η 5 are constant value.Certainly, compressor target Homes Using TV also might not limit corresponding to above five temperature ranges, also can divide thinner by temperature range, specifically can divide according to actual needs.Equally, if other refrigeration plants, such as, air-conditioning, also correspondence can arrange one group of corresponding compressor target Homes Using TV.
According to the average Homes Using TV η obtained in step S110n puts downand the compressor target Homes Using TV η i that current environmental temperature Th is corresponding, calculate the resize ratio K of compressor rotary speeds, that is:
Ks=(ηn puts down/ η i)-1 formula (2-1);
Wherein, n be more than or equal to 2 positive integer; ηn puts downcorrespond to the η in formula (1-2)n puts down; η i is the compressor target Homes Using TV preset in above-mentioned table 1, and the concrete numerical value of η i is determined according to the environment temperature of current detection.As can be seen from formula (2-1), work as ηn puts downwhen being less than η i, Ksbe less than zero; Work as ηn puts downwhen equaling η i, Ksequal zero; Work as ηn puts downwhen being greater than η i, Ksbe greater than zero.In addition, if | Ks| <0.05, then Ksperform according to default value 1.
Step S130, according to the rotating speed of the compressor in the last start-stop cycle when resize ratio of described compressor rotary speed and the adjustment of described compressor rotary speed, calculates the rotating speed after the adjustment of described compressor;
Suppose that last start-stop cycle when compressor rotary speed adjusts was the (n-1)th start-stop cycle, and the rotating speed of the compressor in this start-stop cycle is Sn-1, then the rotating speed S after compressor adjustmentncomputing formula be:
Sn=Sn-1+ Ks* Sn-1formula (3-1);
Wherein, n be more than or equal to 2 positive integer; Snfor the rotating speed after compressor adjustment, it is also the compressor rotary speed in the n-th start-stop cycle.As can be seen from formula (3-1), work as Kswhen being less than zero, the rotating speed of compressor will be turned down; Work as Kswhen equalling zero, the rotating speed of compressor will remain unchanged; Work as Kswhen being greater than zero, the rotating speed of compressor will be heightened.
Step S140, according to the rotating speed after described compressor adjustment, controls described compressor operating.
The control system of frequency conversion refrigerator, by according to the rotating speed after compressor adjustment, controls compressor and runs with the rotating speed after this adjustment.In the present embodiment, the regulation time of compressor rotating speed is next time controlled by the control system of frequency conversion refrigerator, such as, control system can arrange compressor and keep all after dates of the multiple start-stop of operation continuously to carry out adjustment of rotational speed next time again with the rotating speed after adjustment, or is that control system controls according to the difference of the temperature of refrigeration compartment and user's design temperature the time that compressor carries out adjustment of rotational speed.
In the present embodiment; with the compressor target Homes Using TV preset for target; according to the actual startup-shutdown situation of compressor; the rotating speed of continuous adjustment frequency-changeable compressor; until reach desired operation; because the compressor target Homes Using TV preset is corresponding optimum Homes Using TV with current refrigeration equipment, current environmental temperature, noise, power consumption etc. under each side combined factors; therefore, the rotating speed of compressor also namely after now adjustment be current various environmental factor comprehensive under realize the rotating speed of effect optimum.
Further, reference Fig. 2, Fig. 2 is the schematic flow sheet of frequency-changeable compressor control method second embodiment of the present invention.Based on frequency-changeable compressor control method first embodiment of the present invention, in an embodiment, described frequency-changeable compressor control method also comprises:
Step S210, when described compressor is started shooting first after defrost terminates, the last compressor rotary speed in start-stop cycle and the resize ratio of compressor rotary speed when starting according to defrost, calculate compressor rotary speed when described compressor is started shooting first after defrost terminates, and according to this compressor rotary speed, control described compressor operating.
Generally all can need to carry out defrost process in refrigeration plant running, such as, when refrigerator carries out defrost process in the process of freezing, now, refrigerator control system will suspend compressor operation.After defrost terminates, refrigerator control system will open compressor again.Now, when compressor is started shooting first after defrost terminates, the resize ratio of compressor rotary speed when the compressor rotary speed in start-stop cycle last when starting according to defrost and defrost being started, calculates compressor rotary speed during compressor starting shooting first after defrost terminates.
In addition, in the present embodiment, during refrigeration plant defrost, the shutdown duration of compressor is also not counted in the start-stop cycle.Suppose compressor after defrost terminates first start time the corresponding former start-stop cycle be the n-th start-stop cycle, namely this n-th start-stop cycle is the start first after defrost terminates, and adjusts the compressor rotary speed in this n-th start-stop cycle.Be specially: the last compressor rotary speed in start-stop cycle and the resize ratio of compressor rotary speed when starting according to defrost, calculate the compressor rotary speed in this n-th start-stop cycle as follows, computing formula is as follows:
Sn frost=S(n-1) frost+ | Ks| * S(n-1) frostformula (3-2);
Wherein, n be more than or equal to 2 positive integer; Sn frostfor defrost complete after the rotating speed of compressor corresponding to first start-stop cycle, S(n-1) frostfor the compressor rotary speed in start-stop cycle last when defrost starts, | Ks| be the resize ratio of compressor rotary speed.Such as, if refrigeration plant carries out defrost process after the 4th start-stop cycle, compressor hesitation in defrost process.When again starting after defrost terminates, compressor will enter into for the 5th start-stop cycle, then corresponding during compressor start compressor rotary speed S5 frosts=s4 frosts+ | Ks| * S4 frosts.Wherein, K in formula (3-2)scomputational methods can refer to K in formula (2-1)scalculate.
In the present embodiment, step S210 both can carry out after step S140, also can carry out before step S110.When meeting defrost process, need the calculating carrying out separately adjustment of rotational speed for defrost situation.Meanwhile, compressor rotary speed resize ratio | Ks| being more than or equal to zero, therefore, when completing that after defrost process, compressor is started shooting again, now will increasing the rotating speed of compressor.
Further, reference Fig. 3, Fig. 3 is the schematic flow sheet of frequency-changeable compressor control method the 3rd embodiment of the present invention.Based on frequency-changeable compressor control method first embodiment of the present invention, in the present embodiment, described frequency-changeable compressor control method also comprises:
Step S310, if described compressor continuous running time t1be more than or equal to preset duration t2, then according to rotating speed, the continuous running time t of current compressor1, preset duration t2and preset the first adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
The impact of various external environment can be subject in compressor operating process; therefore likely occur that compressor runs the long period continuously with a certain rotating speed and cannot carry out adjustment of rotational speed or shutdown; now the mechanical efficiency of compressor is not high, therefore needs this situation occurred compressor carry out adjustment of rotational speed and make compressor break away from long-play.
In the present embodiment, within a certain start-stop cycle, if compressor continuous running time t1be more than or equal to preset duration t2, then need to adjust the rotating speed of compressor, now generally need the rotating speed increasing compressor.Do not need when adjusting the rotating speed of compressor to shut down, but directly on the basis of original rotating speed, increase the rotating speed of compressor, if the original rotating speed of compressor is Sformer 1, the rotating speed after adjustment is Sexisting 1, presetting the first adjustment of rotational speed radix is P, then the computing formula redefining compressor rotary speed is:
Sexisting 1=Sformer 1+ (t1/ t2) * P formula (3-3);
Wherein, P is the adjustment of rotational speed radix of default compressor, and is an experience constant value, and in the present embodiment, P is preferably 120, (t1/ t2) get the integer value of its result of calculation, only work as t simultaneously1for t2integral multiple time upgrade the rotating speed of compressor.Such as, if t2be 20 minutes, work as t1by the rotating speed of adjustment compressor when=20 minutes; Compressor continues the rotating speed after with adjustment and runs, if the accumulative duration of adjustment rotating speed follow-up reforwarding row reaches 40 minutes, is also t1=40 minutes=2*t2time, by continuing the rotating speed of adjustment compressor, by that analogy, until compressor can break away from long-play.
In the present embodiment, step S310 both can carry out after step S140, also can carry out before step S110.When run into the compressor continuous long period carry out the slow-speed of revolution run time, now need by regulating the rotating speed of compressor to break away from long fallback to make compressor.Compressor carries out rotating speed increase adjustment with reference to the integral multiple of the compressor rotary speed adjusted basis P preset simultaneously.
Further, reference Fig. 4, Fig. 4 is the schematic flow sheet of frequency-changeable compressor control method the 4th embodiment of the present invention.Based on frequency-changeable compressor control method first embodiment of the present invention, in the present embodiment, described frequency-changeable compressor control method also comprises:
Step S410, if the temperature gap Q between current environmental temperature and the target temperature preset1be greater than preset temperature Q2, then according to the rotating speed of current compressor, temperature gap Q between current environmental temperature and the target temperature preset1, preset temperature Q2and preset the second adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
The impact of various external environment can be subject in compressor operating process, the impact that the change comprising the load of refrigeration plant own changes compressor frequency, such as, for refrigerator, when frequently opening refrigerator doors or putting into the food etc. being with heat, all can have an impact to the load of refrigerator, therefore now need the power output increasing compressor, also namely improve the rotating speed of compressor, thus realize freezing sooner.
In the present embodiment, within a certain start-stop cycle, if the temperature gap Q between current environmental temperature and the target temperature preset1be greater than preset temperature Q2, then need to adjust the rotating speed of compressor, now generally need the rotating speed increasing compressor.Do not need when adjusting the rotating speed of compressor to shut down, but directly on the basis of original rotating speed, increase the rotating speed of compressor, if the original rotating speed of compressor is Sformer 2, the rotating speed after adjustment is Sexisting 2, presetting the second adjustment of rotational speed radix is R, then the computing formula redefining compressor rotary speed is:
Sexisting 2=Sformer 2+ (Q1/ Q2) * R formula (3-4);
Wherein, R is the adjustment of rotational speed radix of default compressor, and is an experience constant value, and in the present embodiment, R is preferably 300, (Q1/ Q2) get the integer value of its result of calculation, only work as Q simultaneously1for Q2integral multiple time upgrade the rotating speed of compressor.Such as, if Q2be 2 degrees Celsius, work as t1by the rotating speed of adjustment compressor when=2 degrees Celsius; Compressor continues the rotating speed after with adjustment and runs, if the accumulative temperature difference of adjustment rotating speed follow-up reforwarding row is 4 degrees Celsius, is also Q1=4 degrees Celsius=2*Q2time, by continuing the rotating speed of adjustment compressor, by that analogy, until Q1be less than or equal to Q2.
In the present embodiment, step S410 both can carry out after step S140, also can carry out before step S110.When between refrigeration for refrigerator, the environment temperature of room is greater than a certain temperature threshold with setting target temperature difference, now need by regulating the rotating speed of compressor to improve the refrigerating efficiency of compressor, thus fast-refrigerating.Compressor carries out rotating speed increase adjustment with reference to the integral multiple of the compressor rotary speed adjusted basis R preset simultaneously.
Further, reference Fig. 5, Fig. 5 is the schematic flow sheet of frequency-changeable compressor control method the 5th embodiment of the present invention.Based on frequency-changeable compressor control method first embodiment of the present invention, comprise before above-mentioned steps S110:
Step S011, when compressor powers on first, runs M start-stop cycle continuously with the preset rotation speed that current environmental temperature is corresponding;
Under each environment temperature, compressor is bound to, to there being a best compressor start rotating speed, if compressor runs with this start rotating speed, then to realize the steady operation of compressor the soonest, thus reduces noise, saves electric energy.In the present embodiment, when compressor powers on start first, the control system of refrigerator can detect the ambient temperature value Th of each refrigeration compartment that current each refrigeration compartment temperature sensor obtains in real time, thus compressor optimum speed Sr corresponding current environmental temperature can be got when compressor powers on start first under, see table 2.The optimal compressor start rotating speed that table 2 is the correspondence under various environment temperature of frequency conversion refrigerator in the present invention.
Table 2
Compressor start rotating speed Sr is the optimum empirical value calculate compressor that draws corresponding rotating speed of starting shooting at different ambient temperatures according to reality.In table 2, compressor start rotating speed S1, S2, S3, S4 is constant value.Certainly, compressor start rotating speed also might not limit corresponding to above four temperature ranges, also can divide thinner by temperature range, specifically can divide according to actual needs.Equally, if other refrigeration plants, such as, air-conditioning, also correspondence can arrange one group of corresponding compressor start rotating speed.
For find compressor power on first start time initial launch rotating speed and as the benchmark of subsequent compression machine adjustment of rotational speed, therefore, in the present embodiment, when compressor powers on start first, the preset rotation speed Sr corresponding with current environmental temperature is run M start-stop cycle continuously, in the present embodiment, M is preferably greater than the positive integer equaling 2.By running M start-stop cycle continuously, both the duration of compressor rotary speed adjustment and the frequency of adjustment number of times can have been reduced, simultaneously also can respective row except extraneous factor when compressor starts is for the impact of compressor rotary speed at every turn, in the present invention, run M start-stop cycle continuously by with the initial launch speed of compressor, the concrete number running the start-stop cycle continuously can be arranged according to actual conditions.
Step S012, calculates the Homes Using TV in M start-stop cycle;
When compressor powers on first and starts shooting, run M start-stop cycle, then the Homes Using TV η in M start-stop cycle continuouslymcalculating with reference to formula (1-1).
Step S013, according to Homes Using TV and the default compressor target Homes Using TV corresponding with current environmental temperature in described M start-stop cycle, calculates the resize ratio of compressor rotary speed;
According to the Homes Using TV η in the M start-stop cycle obtained in step S012mand the compressor target Homes Using TV η i that current environmental temperature Th is corresponding, calculate the resize ratio K of compressor rotary speeda, that is:
Ka=(ηm/ η i)-1 formula (2-2);
Wherein, η i is the compressor target Homes Using TV preset in above-mentioned table 1, and the concrete numerical value of η i is determined according to the environment temperature of current detection.As can be seen from formula (2-2), work as ηmwhen being less than η i, Kabe less than zero; Work as ηmequal when η i, Kaequal zero; Work as ηmwhen being greater than η i, Kabe greater than zero.In addition, if | Ka| <0.05, then Kaperform according to default value 1.
Step S014, according to the resize ratio of described compressor rotary speed and the rotating speed of the compressor in described M start-stop cycle, calculate the rotating speed after the adjustment of described compressor, and the start-stop cycle of described compressor is counted again, and the rotating speed after the adjustment of this compressor again count as start-stop cycle of described compressor after initial speed.
According to the resize ratio K of described compressor rotary speedaand the rotating speed Sr of the compressor in described M start-stop cycle, calculate the rotating speed S after compressor adjustmentn, that is:
Sn=Sr+Ka* Sr formula (3-5);
Wherein, n=M+1, meanwhile, after completing the adjustment of rotational speed of compressor, counts again by the start-stop cycle n' after compressor first adjustment of rotational speed, is also n'=1, and 2,3 ... .., n' is positive integer.Now n'=1 is equal to the situation of n=1 in formula (3-1) and formula (3-2).As can be seen from formula (3-5), work as Kawhen being less than zero, the rotating speed of compressor will be turned down; Work as Kawhen equalling zero, the rotating speed of compressor will remain unchanged; Work as Kawhen being greater than zero, the rotating speed of compressor will be heightened.Rotating speed S after compressor adjustmentnusing as the initial speed after start-stop cycle of compressor counts again, also i.e. Sn=Sn'=S1, this S1be equal to the situation of n=1 in formula (3-1) and formula (3-2).
In the present embodiment, for find compressor power on first start time initial launch rotating speed and as the benchmark of subsequent compression machine adjustment of rotational speed, initial launch rotating speed when compressor corresponding for default environment temperature start rotating speed is powered on start as compressor by the present embodiment first.Meanwhile, for avoiding the impact of some environmental factor extraneous, compressor powers on when starting shooting first all can run multiple cycle with rotating speed of initially starting shooting continuously.Wait that having run multiple all after dates starts to carry out compressor rotary speed adjustment, now not only to obtain the rotating speed after adjustment, meanwhile, adjustment of rotational speed terminates rear compressor will enter into stable operation stage, and using the beginning of the start moment after compressor rotary speed adjustment as stable operation stage.
Further, based on frequency-changeable compressor control method first embodiment of the present invention, in frequency-changeable compressor control method the 6th embodiment of the present invention: adjust if meet rotating speed in described compressor operating process, then duration timing from the interim time adjustment of rotating speed of starting shooting in corresponding described Homes Using TV temporarily.
If adjust when meeting rotating speed in compressor start running temporarily; such as, interim adjustment of rotational speed the 3rd, in the 4th embodiment; and adjustment of rotational speed is in such cases not carry out after compressor shutdown; but directly adjust in compressor operating process; therefore, when now described rotating speed being adjusted temporarily the corresponding start-stop cycle described Homes Using TV in duration of starting shooting need timing from the interim time adjustment of rotating speed.Such as, compressor carries out rotating speed in a certain start-stop cycle and adjusts temporarily, is t than start time of running in start-stop cycle like this0, time adjustment is tadjust, the shutdown moment is tstop, then the start duration in this start-stop cycle is not (tstop-t0), but (tadjust-t0).
In the present embodiment, when in compressor start running during its rotating speed generation temporary variations, then need the corresponding duration calculating this rotating speed actual motion, thus reduce the error of calculation, improve accuracy.
In the refrigerator (scheming not shown) of another specific embodiment of the present invention, refrigerator comprises the frequency-converting control device of compressor.With reference to the high-level schematic functional block diagram that Fig. 6, Fig. 6 are frequency-converting control device first embodiment of compressor of the present invention.In the present embodiment, the frequency-converting control device of compressor comprises:
Average Homes Using TV obtains module 110, and during for carrying out compressor rotary speed adjustment at needs, the mean value of the Homes Using TV of the compressor that each start-stop cycle before the adjustment of described compressor rotary speed that calculates is corresponding, obtains average Homes Using TV;
In each start-stop cycle of compressor operating, the start duration in each start-stop cycle and shutdown duration will be recorded.When needing to adjust the rotating speed of compressor, average Homes Using TV obtains the mean value that module 110 calculates the Homes Using TV of compressor corresponding to each start-stop cycle before the adjustment of described compressor rotary speed, to obtain average Homes Using TV.
The number in the Homes Using TV sum/start-stop cycle of the compressor that average Homes Using TV=each start-stop cycle is corresponding, that is:
ηn puts down=(η1+ η2+ ... + ηn-2+ ηn-1)/(n-1) formula (1-2);
Wherein, n be more than or equal to 2 positive integer, ηn puts downfor the mean value of the Homes Using TV in n-1 start-stop cycle before when compressor during n-th time of compressor stable operation stage start carries out adjustment of rotational speed; η1, η2... ηn-2, ηn-1respectively the Homes Using TV in the 1st start-stop cycle of corresponding compressor stable operation stage, the 2nd start-stop cycle Homes Using TV ... the Homes Using TV in the n-th-2 start-stop cycle, the Homes Using TV in the (n-1)th start-stop cycle, and the computational methods of above each Homes Using TV all can refer to formula (1-1).It should be noted that, the 1st start-stop cycle in formula (1-2) is not first start-stop cycle that finger pressure contracting prow powers on when starting shooting, and enters into first start-stop cycle during stable operation stage after start also runs one or more start-stop cycle continuously but compressor powers on first.In general, compressor power on first start time all can first prerun multiple start-stop cycle, and then enter stable operation stage and the start-stop cycle needs again to count.The adjustment of compressor rotary speed needs the Homes Using TV with reference to each start-stop cycle above, the adjustment of compressor rotary speed carries out on the basis of original rotating speed, therefore, compressor powers on when start runs first does not need to carry out the adjustment of rotating speed, and the adjustment of compressor rotary speed generally occurs in after compressor enters stable operation stage.The determination mode of the rotating speed that compressor powers on when starting shooting operation first has a lot, such as, directly presets initial speed, or determines according to current environmental temperature.
Compressor rotary speed resize ratio computing module 120, for according to described average Homes Using TV and the default compressor target Homes Using TV corresponding with current environmental temperature, calculates the resize ratio of compressor rotary speed;
In the present invention, compressor is with target Homes Using TV for target, according to the actual startup-shutdown situation of compressor, and the adjustment that the resize ratio calculating compressor rotary speed realizes compressor rotary speed with this.See table 1.Under each environment temperature, compressor is bound to, to there being a best target Homes Using TV, if compressor runs with this target Homes Using TV, then at utmost reducing the noise of compressor, also at utmost save electric energy simultaneously.In the present embodiment, in the process of compressor operating, the control system of refrigerator can detect the ambient temperature value Th of each refrigeration compartment that current each refrigeration compartment temperature sensor obtains in real time, thus compressor target Homes Using TV η i corresponding current environmental temperature can be got when compressor carries out adjustment of rotational speed under.Compressor rotary speed resize ratio computing module 120 obtains the average Homes Using TV η of module 110 acquisition according to average Homes Using TVn puts downand the compressor target Homes Using TV η i that current environmental temperature Th is corresponding, calculate the resize ratio K of compressor rotary speeds, that is:
Ks=(ηn puts down/ η i)-1 formula (2-1);
Wherein, n be more than or equal to 2 positive integer; ηn puts downcorrespond to the η in formula (1-2)n puts down; η i is the compressor target Homes Using TV preset in above-mentioned table 1, and the concrete numerical value of η i is determined according to the environment temperature of current detection.As can be seen from formula (2-1), work as ηn puts downwhen being less than η i, Ksbe less than zero; Work as ηn puts downequal when η i, Ksequal zero; Work as ηn puts downwhen being greater than η i, Ksbe greater than zero.In addition, if | Ks| <0.05, then Ksperform according to default value 1.
First compressor rotary speed computing module 130, for the rotating speed of the compressor according to the last start-stop cycle when resize ratio of described compressor rotary speed and the adjustment of described compressor rotary speed, calculates the rotating speed after the adjustment of described compressor;
If last start-stop cycle during compressor rotary speed adjustment was the (n-1)th start-stop cycle, and the rotating speed of the compressor in this start-stop cycle is Sn-1, then the rotating speed S after compressor adjustmentncomputing formula be:
Sn=Sn-1+ Ks* Sn-1formula (3-1);
Wherein, n be more than or equal to 2 positive integer; Snfor the rotating speed after compressor adjustment, it is also the compressor rotary speed in the n-th start-stop cycle.As can be seen from formula (3-1), work as Kswhen being less than zero, the rotating speed of compressor will be turned down; Work as Kswhen equalling zero, the rotating speed of compressor will remain unchanged; Work as Kswhen being greater than zero, the rotating speed of compressor will be heightened.
Compressor rotary speed control module 140, for according to the rotating speed after described compressor adjustment, controls described compressor operating.
The control system of frequency conversion refrigerator, by according to the rotating speed after compressor adjustment, controls compressor and runs with the rotating speed after this adjustment.In the present embodiment, the regulation time of compressor rotating speed is next time controlled by the control system of frequency conversion refrigerator, such as, control system can arrange compressor and keep all after dates of the multiple start-stop of operation continuously to carry out adjustment of rotational speed next time again with the rotating speed after adjustment, or is that control system controls according to the difference of the temperature of refrigeration compartment and user's design temperature the time that compressor carries out adjustment of rotational speed.
In the present embodiment; with the compressor target Homes Using TV preset for target; according to the actual startup-shutdown situation of compressor; the rotating speed of continuous adjustment frequency-changeable compressor; until reach desired operation; because the compressor target Homes Using TV preset is corresponding optimum Homes Using TV with current refrigeration equipment, current environmental temperature, noise, power consumption etc. under each side combined factors; therefore, the rotating speed of compressor also namely after now adjustment be current various environmental factor comprehensive under realize the rotating speed of effect optimum.
Further, reference Fig. 7, Fig. 7 is the high-level schematic functional block diagram of frequency-converting control device second embodiment of compressor of the present invention.Based on frequency-converting control device first embodiment of compressor of the present invention, in the present embodiment, the frequency-converting control device of described compressor also comprises:
Second compressor rotary speed computing module 210, for when described compressor is started shooting first after defrost terminates, the last compressor rotary speed in start-stop cycle and the resize ratio of compressor rotary speed when starting according to defrost, calculate compressor rotary speed when described compressor is started shooting first after defrost terminates, and according to this compressor rotary speed, control described compressor operating.
Generally all can need to carry out defrost process in refrigeration plant running, such as, when refrigerator carries out defrost process in the process of freezing, now, refrigerator control system will suspend compressor operation.After defrost terminates, refrigerator control system will open compressor again.Now, when compressor is started shooting first after defrost terminates, the resize ratio of compressor rotary speed when the compressor rotary speed in start-stop cycle last when starting according to defrost and defrost being started, calculates compressor rotary speed during compressor starting shooting first after defrost terminates.
In the present embodiment, during refrigeration plant defrost, the shutdown duration of compressor is also not counted in the start-stop cycle.Therefore, if compressor after defrost terminates first start time the corresponding former start-stop cycle be the n-th start-stop cycle, also namely compressor carries out adjustment of rotational speed when the n-th start-stop cycle start, when then defrost starts, the last start-stop cycle was the (n-1)th start-stop cycle, and compressor rotary speed computing formula during compressor starting shooting first after defrost terminates is as follows:
Sn frost=S(n-1) frost+ | Ks| * S(n-1) frostformula (3-2);
Wherein, n be more than or equal to 2 positive integer; Sn frostfor defrost complete after the rotating speed of compressor corresponding to first start-stop cycle, S(n-1) frostfor the compressor rotary speed in start-stop cycle last when defrost starts, | Ks| be the resize ratio of compressor rotary speed.Such as, if refrigeration plant carries out defrost process after the 4th start-stop cycle, compressor hesitation in defrost process.When again starting after defrost terminates, compressor will enter into for the 5th start-stop cycle, then corresponding during compressor start compressor rotary speed S5 frosts=s4 frosts+ | Ks| * S4 frosts.Wherein, K in formula (3-2)scomputational methods can refer to K in formula (2-1)scalculate.
In the present embodiment, when meeting defrost process, need the calculating carrying out separately adjustment of rotational speed for defrost situation.Meanwhile, compressor rotary speed resize ratio | Ks| being more than or equal to zero, therefore, when completing that after defrost process, compressor is started shooting again, now will increasing the rotating speed of compressor.
Further, reference Fig. 8, Fig. 8 is the high-level schematic functional block diagram of frequency-converting control device the 3rd embodiment of compressor of the present invention.Based on frequency-converting control device first embodiment of compressor of the present invention, in the present embodiment, the frequency-converting control device of described compressor also comprises:
3rd compressor rotary speed computing module 310, if for described compressor continuous running time t1be more than or equal to preset duration t2, then according to rotating speed, the continuous running time t of current compressor1, preset duration t2and preset the first adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
The impact of various external environment can be subject in compressor operating process; therefore likely occur that compressor runs the long period continuously with a certain rotating speed and cannot carry out adjustment of rotational speed or shutdown; now the mechanical efficiency of compressor is not high, therefore needs this situation occurred compressor carry out adjustment of rotational speed and make compressor break away from long-play.
In the present embodiment, within a certain start-stop cycle, if compressor continuous running time t1be more than or equal to preset duration t2, then need to adjust the rotating speed of compressor, now generally need the rotating speed increasing compressor.Do not need when adjusting the rotating speed of compressor to shut down, but directly on the basis of original rotating speed, increase the rotating speed of compressor, if the original rotating speed of compressor is Sformer 1, the rotating speed after adjustment is Sexisting 1, presetting the first adjustment of rotational speed radix is P, then the computing formula redefining compressor rotary speed is:
Sexisting 1=Sformer 1+ (t1/ t2) * P formula (3-3);
Wherein, P is the adjustment of rotational speed radix of default compressor, and is an experience constant value, and in the present embodiment, P is preferably 120, (t1/ t2) get the integer value of its result of calculation, only work as t simultaneously1for t2integral multiple time upgrade the rotating speed of compressor.Such as, if t2be 20 minutes, work as t1by the rotating speed of adjustment compressor when=20 minutes; Compressor continues the rotating speed after with adjustment and runs, if the accumulative duration of adjustment rotating speed follow-up reforwarding row reaches 40 minutes, is also t1=40 minutes=2*t2time, by continuing the rotating speed of adjustment compressor, by that analogy, until compressor can break away from long-play.
In the present embodiment, when run into the compressor continuous long period carry out the slow-speed of revolution run time, now need by regulating the rotating speed of compressor to break away from long fallback to make compressor.Compressor carries out rotating speed increase adjustment with reference to the integral multiple of the compressor rotary speed adjusted basis P preset simultaneously.
Further, reference Fig. 9, Fig. 9 is the high-level schematic functional block diagram of frequency-converting control device the 4th embodiment of compressor of the present invention.Based on frequency-converting control device first embodiment of compressor of the present invention, in the present embodiment, the frequency-converting control device of described compressor also comprises:
4th compressor rotary speed computing module 410, if for the temperature gap Q between current environmental temperature and the target temperature preset1be greater than preset temperature Q2, then according to the rotating speed of current compressor, temperature gap Q between current environmental temperature and the target temperature preset1, preset temperature Q2and preset the second adjustment of rotational speed radix, calculate new compressor rotary speed, and the compressor rotary speed new according to this, control described compressor operating.
The impact of various external environment can be subject in compressor operating process, the impact that the change comprising the load of refrigeration plant own changes compressor frequency, such as, for refrigerator, when frequently opening refrigerator doors or putting into the food etc. being with heat, all can have an impact to the load of refrigerator, therefore now need the power output increasing compressor, also namely improve the rotating speed of compressor, thus realize freezing sooner.
In the present embodiment, within a certain start-stop cycle, if the temperature gap Q between current environmental temperature and the target temperature preset1be greater than preset temperature Q2, then need to adjust the rotating speed of compressor, now generally need the rotating speed increasing compressor.Do not need when adjusting the rotating speed of compressor to shut down, but directly on the basis of original rotating speed, increase the rotating speed of compressor, if the original rotating speed of compressor is Sformer 2, the rotating speed after adjustment is Sexisting 2, presetting the second adjustment of rotational speed radix is R, then the computing formula redefining compressor rotary speed is:
Sexisting 2=Sformer 2+ (Q1/ Q2) * R formula (3-4);
Wherein, R is the adjustment of rotational speed radix of default compressor, and is an experience constant value, and in the present embodiment, R is preferably 300, (Q1/ Q2) get the integer value of its result of calculation, only work as Q simultaneously1for Q2integral multiple time upgrade the rotating speed of compressor.Such as, if Q2be 2 degrees Celsius, work as t1by the rotating speed of adjustment compressor when=2 degrees Celsius; Compressor continues the rotating speed after with adjustment and runs, if the accumulative temperature difference of adjustment rotating speed follow-up reforwarding row is 4 degrees Celsius, is also Q1=4 degrees Celsius=2*Q2time, by continuing the rotating speed of adjustment compressor, by that analogy, until Q1be less than or equal to Q2.
In the present embodiment, when when between refrigeration for refrigerator, the environment temperature of room is greater than a certain temperature threshold with setting target temperature difference, now need by regulating the rotating speed of compressor to export with the acting improving compressor, thus fast-refrigerating.Compressor carries out rotating speed increase adjustment with reference to the integral multiple of the compressor rotary speed adjusted basis R preset simultaneously.
Further, reference Figure 10, Figure 10 is the high-level schematic functional block diagram of frequency-converting control device the 5th embodiment of compressor of the present invention.Based on frequency-converting control device first embodiment of compressor of the present invention, the frequency-converting control device of compressor of the present invention also comprises:
Initial speed runs module 510, when powering on first for compressor, runs M start-stop cycle continuously with the preset rotation speed that current environmental temperature is corresponding;
Under each environment temperature, compressor is bound to, to there being a best compressor start rotating speed, if compressor runs with this start rotating speed, then to realize the steady operation of compressor the soonest, thus reduces noise, saves electric energy.
In the present embodiment, when compressor powers on start first, the control system of refrigerator can detect the ambient temperature value Th of each refrigeration compartment that current each refrigeration compartment temperature sensor obtains in real time, thus compressor optimum speed Sr corresponding current environmental temperature can be got when compressor powers on start first under.For find compressor power on first start time initial launch rotating speed and as the benchmark of subsequent compression machine adjustment of rotational speed, therefore, in the present embodiment, when compressor powers on start first, the preset rotation speed Sr corresponding with current environmental temperature is run M start-stop cycle continuously, in the present embodiment, M is preferably greater than the positive integer equaling 2.By running M start-stop cycle continuously, both the duration of compressor rotary speed adjustment and the frequency of adjustment can have been reduced, simultaneously also can respective row except extraneous factor when compressor starts is for the impact of compressor rotary speed at every turn, in the present invention, run M start-stop cycle continuously by with the initial launch speed of compressor, the concrete number running the start-stop cycle continuously can be arranged according to actual conditions.
Initial Homes Using TV computing module 520, for calculating the Homes Using TV in M start-stop cycle;
When compressor powers on first and starts shooting, run M start-stop cycle, then the Homes Using TV η in M start-stop cycle continuouslymcalculating with reference to formula (1-1).
The initial resize ratio computing module 530 of compressor rotary speed, for according to the Homes Using TV in described M start-stop cycle and the default compressor target Homes Using TV corresponding with current environmental temperature, calculates the resize ratio of compressor rotary speed;
According to the Homes Using TV η in the M start-stop cycle that initial Homes Using TV computing module 520 obtainsmand the compressor target Homes Using TV η i that current environmental temperature Th is corresponding, calculate the resize ratio K of compressor rotary speeda, that is:
Ka=(ηm/ η i)-1 formula (2-2);
Wherein, η i is the compressor target Homes Using TV preset in above-mentioned table 1, and the concrete numerical value of η i is determined according to the environment temperature of current detection.As can be seen from formula (2-2), work as ηmwhen being less than η i, Kabe less than zero; Work as ηmequal when η i, Kaequal zero; Work as ηmwhen being greater than η i, Kabe greater than zero.In addition, if | Ka| <0.05, then Kaperform according to default value 1.
The adjustment of compressor initial speed and control module 540, for according to the resize ratio of described compressor rotary speed and the rotating speed of the compressor in described M start-stop cycle, calculate the rotating speed after the adjustment of described compressor, and the start-stop cycle of described compressor is counted again, and the rotating speed after the adjustment of this compressor again count as start-stop cycle of described compressor after initial speed.
According to the resize ratio K of described compressor rotary speedaand the rotating speed Sr of the compressor in described M start-stop cycle, calculate the rotating speed S after compressor adjustmentn, that is:
Sn=Sr+Ka* Sr formula (3-5);
Wherein, n=M+1, meanwhile, after completing the adjustment of rotational speed of compressor, counts again by the start-stop cycle n' after compressor first adjustment of rotational speed, is also n'=1, and 2,3 ... .., n' is positive integer.Now n'=1 is equal to the situation of n=1 in formula (3-1) and formula (3-2).As can be seen from formula (3-5), work as Kawhen being less than zero, the rotating speed of compressor will be turned down; Work as Kawhen equalling zero, the rotating speed of compressor will remain unchanged; Work as Kawhen being greater than zero, the rotating speed of compressor will be heightened.Rotating speed S after compressor adjustmentnusing as the initial speed after start-stop cycle of compressor counts again, also i.e. Sn=Sn'=S1, this S1be equal to the situation of n=1 in formula (3-1) and formula (3-2).
In the present embodiment, for find compressor power on first start time initial launch rotating speed and as the benchmark of subsequent compression machine adjustment of rotational speed, initial launch rotating speed when compressor corresponding for default environment temperature start rotating speed is powered on start as compressor by the present embodiment first.Meanwhile, for avoiding the impact of some environmental factor extraneous, compressor powers on when starting shooting first all can run multiple cycle with rotating speed of initially starting shooting continuously.Wait that having run multiple all after dates starts to carry out compressor rotary speed adjustment, now not only to obtain the rotating speed after adjustment, meanwhile, adjustment of rotational speed terminates rear compressor will enter into stable operation stage, and using the beginning of the start moment after compressor rotary speed adjustment as stable operation stage.
Further, based on frequency-converting control device first embodiment of compressor of the present invention, in frequency-converting control device the 6th embodiment of compressor of the present invention: adjust if meet rotating speed in described compressor operating process, then duration timing from the interim time adjustment of rotating speed of starting shooting in corresponding described Homes Using TV temporarily.
If adjust when meeting rotating speed in compressor start running temporarily; such as, interim adjustment of rotational speed the 3rd, in the 4th embodiment; and adjustment of rotational speed is in such cases not carry out after compressor shutdown; but directly adjust in compressor operating process; therefore, when now described rotating speed being adjusted temporarily the corresponding start-stop cycle described Homes Using TV in duration of starting shooting need timing from the interim time adjustment of rotating speed.Such as, compressor carries out rotating speed in a certain start-stop cycle and adjusts temporarily, is t than start time of running in start-stop cycle like this0, time adjustment is tadjust, the shutdown moment is tstop, then the start duration in this start-stop cycle is not (tstop-t0), but (tadjust-t0).
In the present embodiment, when in compressor start running during its rotating speed generation temporary variations, then need the corresponding duration calculating this rotating speed actual motion, thus reduce the error of calculation, improve accuracy.
Preferably, in the present invention, when carrying out adjustment of rotational speed, also be the calculating for compressor rotary speed in formula (3-1) to formula (3-5), if the compressor rotary speed calculated is more than or equal to the specified maximum speed of compressor, then compressor runs with this specified maximum speed; Equally, if the compressor rotary speed calculated is less than or equal to the specified minimum speed of compressor, then compressor runs with this specified minimum speed.
Preferably, need to be accurate to the integral multiple of predetermined threshold value L to the compressor rotary speed that formula (3-5) calculates by formula (3-1).Wherein, L is preferably 30rpm, is the minimum adjustment amount of compressor rotary speed.
Preferably, by formula (3-1) to formula (3-5) if the compressor rotary speed calculated drops in the scope of compressor resonance speed, then need to revise this compressor rotary speed, computing formula is:
S=Sthe resonance upper limit+ L formula (2-5);
Wherein, S is revised compressor rotary speed, Sthe resonance upper limitfor the resonance speed upper limit of compressor, L is the minimum adjustment amount of compressor rotary speed, and L is preferably 30rpm.
Preferably, in press running, if more than one of the refrigeration compartment of refrigeration plant, then each refrigeration compartment needs the compressor rotary speed calculating corresponding refrigeration compartment.After the compressor rotary speed that above each refrigeration compartment is corresponding calculates respectively and terminates, compressor runs according to rotating speed the highest in result of calculation the most at last.Such as, if refrigerator comprises multiple refrigeration compartment, because the temperature conditions of each refrigeration compartment is different, the rotating speed of each refrigeration compartment required compressor is also different, then finally get the running speed of maximum speed wherein as compressor, to ensure the refrigeration demand of each refrigeration compartment.
These are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.