CN105588384A - Oil return control method and device of variable frequency air conditioner compressor - Google Patents
Oil return control method and device of variable frequency air conditioner compressor Download PDFInfo
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- CN105588384A CN105588384A CN201410755800.4A CN201410755800A CN105588384A CN 105588384 A CN105588384 A CN 105588384A CN 201410755800 A CN201410755800 A CN 201410755800A CN 105588384 A CN105588384 A CN 105588384A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The embodiment of the invention provides an oil return control method and device of a variable frequency air conditioner compressor, and relates to the technical field of variable frequency air conditioners. The oil return control method and device are used for solving the problem that when a fixed oil return frequency is adopted for carrying out oil return control over the variable frequency air conditioner compressor, the compressor is damaged. The method comprises the steps that a first running frequency of the compressor is acquired; the temperature of the outdoor temperature where the compressor is located is acquired; the oil return frequency of the compressor is determined according to the temperature of the outdoor temperature and a first preset rule, wherein the first preset rule comprises the corresponding relationship between the temperature of the outdoor environment and the oil return frequency of the compressor; and the first running frequency of the compressor is adjusted to be the oil return frequency. The oil return control method and device can be used for oil return control over the variable frequency air conditioners.
Description
Technical field
The present invention relates to convertible frequency air-conditioner technical field, relate in particular to a kind of frequency converting air-conditioner compressorMethod for controlling oil return and device.
Background technology
Convertible frequency air-conditioner is in the process of operation, and lubricating oil can together be discharged compressor along with cold-producing medium,Enter into evaporimeter, condenser and pipe arrangement. Only have this part lubricating oil of discharge to get back to smoothlyIn compressor, just can maintain the dynamic equilibrium of lubricating oil in whole system, otherwise, compressor meetingDamage because of oil starvation. Lubricating oil being discharged to from compressor to the process of getting back to compressor is calledOil return.
And convertible frequency air-conditioner is after shutdown, the lubricating oil in compressor can be discharged from compressor, because ofThis, may there is the problem of oil starvation in the stage of restarting in compressor; And, due to startupStage system pressure transient, can cause compressor oil return also unstable, and then occur compressorThe problem of oil starvation; In addition, compressor in the time of long-term low-frequency operation, the profit of discharging from compressorLubricating oil cannot effectively be brought back to compressor, also there will be the problem of oil starvation. And compressor oil starvationTime, be easy to cause compressor abrasion, overheated burning out even.
In order to address the above problem, the method generally adopting in prior art is: when compressor existsWhen running time under low frequency state is long, allow compressor under a certain fixed frequency settingOperation a period of time is carried out oil return, and this fixed frequency also can be called oil return frequency. Ordinary circumstanceUnder, the 60%-70% that is specified running frequency by oil return set of frequency. But set by the methodOil return frequency is only relevant with the specified running frequency of compressor, not considering compression machine realityThe restrictive conditions such as working environment, overcurrent protection, pressure at expulsion protection. So, adopting admittedlyDetermining oil return frequency carries out oil return control to compressor and may cause damage to compressor.
Summary of the invention
Embodiments of the invention provide a kind of method for controlling oil return and dress of frequency converting air-conditioner compressorPut, while frequency converting air-conditioner compressor being carried out to oil return control to solve the fixing oil return frequency of existing employingCause the impaired problem of compressor.
For achieving the above object, embodiments of the invention adopt following technical scheme:
First aspect, provides a kind of method for controlling oil return of frequency converting air-conditioner compressor, the methodComprise:
Obtain the first running frequency of compressor;
Obtain the residing outdoor environment temperature of described compressor;
According to described outdoor environment temperature and the first preset rules, determine returning of described compressorOil frequency, described the first preset rules comprises returning of described outdoor environment temperature and described compressorThe corresponding relation of oil frequency;
The first running frequency of described compressor is adjusted into described oil return frequency.
Second aspect, provides a kind of oil return control device of frequency converting air-conditioner compressor, this deviceComprise: acquisition module, determination module, adjusting module;
Described acquisition module, for obtaining the first running frequency of compressor;
Described acquisition module, also for obtaining the residing outdoor environment temperature of described compressor;
Described determination module, for according to described outdoor environment temperature and the first preset rules,Determine the oil return frequency of described compressor, described the first preset rules comprises described outdoor environment temperatureThe corresponding relation of the oil return frequency of degree and described compressor;
Described adjusting module, for being adjusted into the first running frequency of described compressor described returningOil frequency.
The embodiment of the present invention provides a kind of method for controlling oil return and dress of frequency converting air-conditioner compressorPut, the method comprises: the first running frequency of obtaining compressor; Obtain described compressor of living inOutdoor environment temperature; According to described outdoor environment temperature and the first preset rules, determine instituteState the oil return frequency of compressor, described the first preset rules comprises described outdoor environment temperature and instituteState the corresponding relation of the oil return frequency of compressor; By the first running frequency adjustment of described compressorFor described oil return frequency. Concrete, compressor, can be of living according to compressor in the time carrying out oil returnOutdoor environment temperature and the first preset rules, determine the oil return frequency of compressor. Due toThe oil return frequency of the compressor of determining by this first preset rules is along with outdoor environment temperatureVariation change, so in the time that compressor is carried out to oil return control, its oil return frequency and existingHaving the oil return frequency difference arranging in technology, is no longer fixes relevant with specified running frequencyValue, thereby also just can, as prior art, in the time of compressor oil return, not cause damage to compressorWound. So compared with prior art, the method for controlling oil return that the embodiment of the present invention provides is passableEffectively solve when the fixing oil return frequency of existing employing is carried out oil return control to frequency converting air-conditioner compressor and leadCause the impaired problem of compressor.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below will be to embodiment orIn description of the Prior Art, the accompanying drawing of required use is briefly described, apparently, belowAccompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain other according to these accompanying drawingsAccompanying drawing.
The method for controlling oil return of a kind of frequency converting air-conditioner compressor that Fig. 1 provides for the embodiment of the present inventionFlow chart;
The different outdoor environment temperatures that Fig. 2 provides for the embodiment of the present invention and the oil return of compressor are frequentlyRate is related to schematic diagram;
The oil return controlling party of the another kind of frequency converting air-conditioner compressor that Fig. 3 provides for the embodiment of the present inventionThe flow chart of method;
The different outdoor environment temperatures that record under the refrigeration mode that Fig. 4 provides for the embodiment of the present inventionOil return frequency relation schematic diagram with compressor;
The different outdoor environment temperatures that record under the heating mode that Fig. 5 provides for the embodiment of the present inventionOil return frequency relation schematic diagram with compressor;
The oil return control device of a kind of frequency converting air-conditioner compressor that Fig. 6 provides for the embodiment of the present inventionSchematic diagram;
The oil return control dress of the another kind of frequency converting air-conditioner compressor that Fig. 7 provides for the embodiment of the present inventionThe schematic diagram of putting.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, to the technical side in the embodiment of the present inventionCase is clearly and completely described, and obviously, described embodiment is only one of the present inventionDivide embodiment, instead of whole embodiment. Based on the embodiment in the present invention, this area is generalLogical technical staff is not making the every other embodiment obtaining under creative work prerequisite,All belong to the scope of protection of the invention.
The embodiment of the present invention provides a kind of method for controlling oil return of frequency converting air-conditioner compressor, as Fig. 1Shown in, comprising:
Step 101, obtain the first running frequency of compressor.
Wherein, the first running frequency of compressor refers to the real time execution frequency that compressor is current.Concrete, can be by the running frequency that has controller Real-Time Monitoring compressor in convertible frequency air-conditioner.
Step 102, obtain the residing outdoor environment temperature of described compressor.
Concrete, can be on compressor set temperature sensor, temperature sensor can gatherOutdoor environment temperature information, and the outdoor environment temperature information collecting is sent to convertible frequency air-conditionerController. Like this, controller just can get the residing outdoor environment temperature of compressor.
Step 103, according to described outdoor environment temperature and the first preset rules, determine described pressureThe oil return frequency of contracting machine, described the first preset rules comprises described outdoor environment temperature and described pressureThe corresponding relation of the oil return frequency of contracting machine.
Wherein, described the first preset rules can be pre-stored in the controller of convertible frequency air-conditioner,And the first preset rules comprises the correspondence pass of the oil return frequency of outdoor environment temperature and compressorSystem. Therefore, convertible frequency air-conditioner in the process of work, the chamber that only need to arrive according to monitoring control devicesExternal environment temperature, inquiry the first preset rules just can be determined relative with this outdoor environment temperatureThe oil return frequency of the compressor of answering.
Wherein, this first preset rules can record by experiment. For example, in the time of actual measurement,Can, taking the condensing pressure of compressor in compressor specifications and evaporating pressure as restrictive condition, surveyMeasure under different outdoor environment temperatures, compressor can reach under the effect of this restrictive conditionLarge running frequency, then according to the oil return frequency of this maximum frequency of operation setting compressor.
Concrete, the oil return frequency of the compressor of determining by method of the present invention, pressureIn the maximum frequency of operation that can reach when the real work of contracting machine and prior art, compressor returnsThe relation of oil frequency as shown in Figure 2. Wherein, the longitudinal axis represents the running frequency F of compressor, transverse axisRepresent the residing outdoor environment temperature T_outdoor of compressor, F0 represents the specified fortune of compressorLine frequency, Fmax represents what compressor can reach under the restriction of condensing pressure and evaporating pressureMaximum frequency of operation, F_oil represents the oil return frequency of compression. As can be seen from Figure 2, by the present inventionThe definite oil return frequency of method more press close to the actual maximum operation that can reach of compressor frequentlyRate. And when the oil return frequency F0 setting in employing prior art, when outdoor environment temperature exceedes T0Time, its oil return frequency has exceeded the maximum frequency of operation that compressor can bear, thereby meetingCompressor is caused to damage.
It should be noted that the oil return of the compressor of setting according to the maximum frequency of operation of compressorFrequency is less than or equal to its maximum frequency of operation, the maximum fortune of the compressor generally recording than experimentThe little 5Hz of line frequency left and right; The condensing pressure of compressor and evaporating pressure can be by being arranged on pressureTwo pressure sensors on contracting machine blast pipe and air intake duct obtain, and pressure sensor can will recordPressure information send to variable frequency air-conditioner controller.
Example, as shown in Figure 2, while supposing that outdoor environment temperature is T0, the condensation of compressorPressure and evaporating pressure are respectively 4.5MPa and 1.15MPa, and the compression of correspondence under this pressureThe maximum frequency of operation of machine is that Fmax is 45Hz, preferred, can be by the oil return of compressor frequentlyRate is set to 40Hz. Like this, compressor is in the time carrying out oil return, and its oil return frequency just can not exceedThe maximum frequency of operation of compressor, also can not carry out oil return at the peak frequency place of compressor, thisTime compressor can overload operation, thereby can not cause damage to compressor. In other temperatureUnder, measuring method is the same, does not repeat them here.
Step 104, the first running frequency of described compressor is adjusted into the oil return of described compressorFrequency.
Wherein, when the oil return frequency of described compressor is less than or equal to described compressor and normally worksMaximum frequency of operation. Concrete, controller is according to the residing outdoor environment temperature of compressor,Inquire about the first preset rules, determine the oil return of compressor corresponding under this outdoor environment temperature frequentlyRate, and the first running frequency of controlling compressor is adjusted into and determines according to the first preset rulesThe oil return frequency of compressor.
The embodiment of the present invention provides a kind of method for controlling oil return of frequency converting air-conditioner compressor, the partyMethod comprises: the first running frequency of obtaining compressor; Obtain the residing outdoor ring of described compressorBorder temperature; According to described outdoor environment temperature and the first preset rules, determine described compressorOil return frequency, described the first preset rules comprises described outdoor environment temperature and described compressorThe corresponding relation of oil return frequency; The first running frequency of described compressor is adjusted into described returningOil frequency. Concrete, compressor, can be according to the residing outdoor ring of compressor in the time carrying out oil returnBorder temperature and the first preset rules, determine the oil return frequency of compressor. Due to by thisThe oil return frequency of the compressor that one preset rules is determined is along with the variation of outdoor environment temperatureChange, so in the time that compressor is carried out to oil return control, in its oil return frequency and prior artThe oil return frequency difference arranging, is no longer a fixed value relevant with specified running frequency, therebyAlso just can, as prior art, in the time of compressor oil return, not cause damage to compressor. So,Compared with prior art, the method for controlling oil return that the embodiment of the present invention provides can effectively solve existingHaving while adopting fixing oil return frequency to carry out oil return control to frequency converting air-conditioner compressor causes compressor to be subject toThe problem of damaging. Further, by working stage and the continuous operating time of monitoring compressor,Whether can also more accurately determine compressor needs to carry out oil return under current state, fromAnd realization oil return control more accurately.
Optionally, as shown in Figure 3, in step 101: obtain compressor the first running frequency itAfter, described method also comprises:
Step 105, determine the working stage of described compressor, the working stage bag of described compressorThe startup stage of drawing together and the operation phase.
The accumulated running time concrete, the controller in convertible frequency air-conditioner can monitoring compressor,From starting to the running time of current time, and according to the length of compressor operating time, reallyDetermine compressor in startup stage or the operation phase. Example, if monitoring control devices is to compressionThe accumulated running time of machine was 3 seconds, judge compressor operating startup stage; If controlThe accumulated running time that device monitors compressor is 3 hours, judges that compressor operating is in operationStage.
If determine the startup stage that the working stage of compressor being, perform step 102, in compressionThe startup stage that the working stage of machine being, obtain the residing outdoor environment temperature of described compressor.
Concrete, if the startup stage that the working stage of compressor being, illustrate that compressor exists scarceThe risk of oil need to be carried out oil return control to compressor. Definite compressor operating startup stageAfter, can continue to perform step 102-step 104, realize the control to compressor oil return. NeedIllustrate, startup stage under, the first running frequency is exactly the frequency of compressor while just having startedRate, oil return frequency that also can be from zero-frequency raising frequency to compressor by compressor.
If determine, the working stage of compressor is the operation phase, performs step 106-step 108.
Step 106, determine whether the first running frequency of described compressor is less than predeterminated frequency, instituteState predeterminated frequency and be less than described oil return frequency.
Concrete, predeterminated frequency is pre-stored in the controller of convertible frequency air-conditioner, works as controlDevice monitors compressor in the time of the operation phase, and controller can be by first of the compressor monitoringRunning frequency and pre-stored predeterminated frequency compare. If the first running frequency is less than compressionThe predeterminated frequency of machine, performs step 107; Otherwise controller can exist the compressor of its recordContinuous operating time zero clearing under the first running frequency, recording compressed machine in the first operation frequently againContinuous operating time under rate. Wherein, while generally the running frequency of compressor being less than to 30Hz, recognizeFor being low-frequency operation state, so can be set to 30Hz by predeterminated frequency.
If the first running frequency of the described compressor of step 107 is less than described predeterminated frequency, obtainGet the continuous operating time of described compressor.
It is first pre-whether step 108, the continuous operating time of determining described compressor are more than or equal toIf the time.
Concrete, controller can be according to the compressor of its record the company under the first running frequencyReforwarding line time, relatively draws the magnitude relationship of this continuous operating time and the first Preset Time.If compressor is in the situation that being less than predeterminated frequency, the time of moving has continuously exceeded first and has presetTime, perform step 102; Otherwise controller continues compressor under the first running frequencyContinuous operating time add up, until that this continuous operating time is more than or equal to is first defaultTime. Wherein, the first Preset Time is traditionally arranged to be 1 hour.
Concrete, for step 106-step 108, if the working stage of compressor is operation rankSection, illustrates that compressor likely exists the risk of oil starvation. In this case, controller needsFirst the first running frequency that compares compressor namely current real time execution frequency with defaultThe size of frequency. If current real time execution frequency is less than predeterminated frequency, compressor place is describedIn low-frequency operation state, now need to judge again compressor under low frequency state continuously operation timeBetween whether be more than or equal to the first Preset Time. If controller is determined the current state of compressorNot only meet step 106 but also met the condition described in step 108, can continue to perform step 102-Step 104, determines the oil return frequency of compressor, then by described pressure according to the first preset rulesThe first running frequency of contracting machine is adjusted into the oil return frequency of described compressor.
Example, if predeterminated frequency is 30Hz, the first Preset Time is 1 hour, when controllingWhen device monitors compressor moved 65 minutes under the low frequency of 25Hz, controller is by compressorBe judged to be to carry out oil return. This Time Controller can be according to the current outdoor environment temperature monitoringDegree, inquiry the first preset rules is also determined the oil return frequency of compressor. If current outdoor environmentTemperature is 25 DEG C, is 55Hz by the oil return frequency of inquiring about the compressor that the first preset rules obtains,The running frequency of controller control compressor is from 25Hz raising frequency to 55Hz.
Optionally, as shown in Figure 3, in step 102: obtain the residing outdoor ring of described compressorAfter the temperature of border, described method can also comprise:
Step 109, determine the mode of operation of described convertible frequency air-conditioner, described mode of operation comprises refrigerationPattern and heating mode.
If the mode of operation of described convertible frequency air-conditioner is refrigeration mode, perform step 110, becomingFrequently air-conditioning work in the time of refrigeration mode, according to described outdoor environment temperature and the second preset rules,Determine the oil return frequency of described compressor, described the second preset rules is included in described refrigeration modeUnder, the corresponding relation of the oil return frequency of described outdoor environment temperature and described compressor, then holdsRow step 104.
If the mode of operation of described convertible frequency air-conditioner is heating mode, perform step 111, becomingFrequently air-conditioning work in the time of heating mode, according to described outdoor environment temperature and the 3rd preset rules,Determine the oil return frequency of described compressor, described the 3rd preset rules is included in described heating modeUnder, the corresponding relation of the oil return frequency of described outdoor environment temperature and described compressor, then holdsRow step 104.
Wherein, described the second preset rules and the 3rd default be the pre-stored control at convertible frequency air-conditionerIn device processed, and the second preset rules comprises under refrigeration mode, outdoor environment temperature and compressionThe corresponding relation of the oil return frequency of machine. Under heating mode and three sigma rule comprises, outdoorThe relation of the oil return frequency of environment temperature and compressor. Convertible frequency air-conditioner, in the process of work, is controlledDevice processed only needs, according to mode of operation and the outdoor environment temperature of the convertible frequency air-conditioner monitoring, to pass throughInquire about the second preset rules or the 3rd preset rules and can determine the oil return frequency of compressor.
It should be noted that, and though compressor operating startup stage or the operation phase, in stepRapid 102: after obtaining the residing outdoor environment temperature of compressor, all can perform step 109:Determine mode of operation and the subsequent step of convertible frequency air-conditioner.
Concrete, the oil return frequency relation of different outdoor environment temperatures and compressor under refrigeration modeSpecifically see Fig. 4, its piecewise function expression formula is specifically in table 1. Different chamber's external environment under heating modeThe oil return frequency relation of temperature and compressor is specifically shown in Fig. 5, and its piecewise function expression formula is specifically in Table2。
Table 1
It should be noted that, in Fig. 4, outdoor environment temperature T2 > T1, the oil return frequency of compressorF1>F2. In the time of T1<T_outdoor<T2, its function expression is by point (T2, F2)Try to achieve with the slope of line segment in this interval. The first preset rules described in step 103 canIt is the corresponding relation of the outdoor environment temperature shown in table 1 and oil return frequency. Under normal circumstances,The value of T1 is 40 DEG C, and the value of T2 is 45 DEG C, and the value of F1 is 55Hz, and the value of F2 is40Hz。
Table 2
It should be noted that, in Fig. 5, outdoor environment temperature T4 > T3, the oil return frequency of compressorF3>F4. In the time of T3<T_outdoor<T4, its function expression is by point (T4, F4)Try to achieve with the slope of line segment in this interval. Under normal circumstances, the value of T3 is 18 DEG C, T4'sValue is 45 DEG C, and the value of F3 is 55Hz, and the value of F4 is 40Hz.
It should be noted that, can also pass through different working modes and difference in Fig. 4 and Fig. 5Oil return frequency under outdoor environment temperature compares, to the oil return under same outdoor environment temperatureFrequency is got two kinds of smaller values under mode of operation, and using the oil return frequency that method obtains thus asThe first preset rules. Like this, controller only need obtain the residing outdoor environment temperature of compressor,
Inquire about the first preset rules and can obtain a comparatively suitable oil return frequency values.
Example, taking the operational mode of convertible frequency air-conditioner as refrigeration mode, the value of T1 is 40 DEG C,The value of T2 is 45 DEG C, and the value of F1 is 55Hz, and the value of F2 is that 40Hz is example, to compressionThe oil return control of machine describes. Concrete, can draw in current value according to table 1Under, the function expression of compressor oil return frequency is as shown in table 3.
Table 3
Now, if the current outdoor environment temperature that controller receives is 42 DEG C, by inquiryThe second preset rules (table 3) can know, 42 DEG C of current outdoor environment temperatures 40-45 DEG C itBetween, oil return frequency F_oilreturn=40+3 (45-42)=49Hz that it is corresponding, if currentThe real time execution frequency of compressor is 20Hz, controller can by the oil return frequency of compressor from20Hz raising frequency carries out oil return to 49Hz.
Optionally, in step 104: the first running frequency of described compressor is adjusted into described pressureAfter the oil return frequency of contracting machine, described method can also comprise: control described compressor according to instituteState oil return frequency and move the second Preset Time.
Wherein, the second Preset Time is the oil return running time of pre-set compressor. ExcellentChoosing, be advisable with 1-3 minute.
Concrete, if the time that monitoring control devices moves under low frequency state to compressor exceed theOne Preset Time, illustrates that compressor is in oil starvation state, and this Time Controller can be to compressorRunning frequency is adjusted, and its running frequency is increased to oil return frequency from current lower frequency.Higher due to the oil return set of frequency of compressor, so when controller control compressor is with this timeOil frequency is moved after the second Preset Time, and lubricating oil can be at compressor, evaporimeter, condenserWith fully circulation in pipe arrangement, and then make the lubricating oil in whole air-conditioning system reach dynamic equilibrium,Solve the problem of compressor oil starvation.
After compressor oil return finishes, compressor is no longer oil starvation state, and controller can stopCompressor is carried out to oil return control, and according to actual refrigeration or heat the fortune of demand to compressorLine frequency is adjusted, by the running frequency of compressor from current oil return frequency, according to necessarilyRaising frequency or frequency reducing speed be adjusted into the required running frequency of compressor. It should be noted that, thisThe size of the speed of invention to raising frequency or frequency reducing does not limit.
Example, if the oil return frequency of compressor is 55Hz, suppose carrying out oil return in 1-3 minuteAfter, the current frequency that needs operation of compressor is 35Hz, compressor can be with 5Hz's per secondSpeed is carried out frequency reducing; Like this, only need the running frequency of the time compressor of 4 seconds just canTo be down to 35Hz from 55Hz.
The embodiment of the present invention provides a kind of method for controlling oil return of frequency converting air-conditioner compressor, the partyMethod comprises: the first running frequency of obtaining compressor; Obtain the residing outdoor ring of described compressorBorder temperature; According to described outdoor environment temperature and the first preset rules, determine described compressorOil return frequency, described the first preset rules comprises described outdoor environment temperature and described compressorThe corresponding relation of oil return frequency; The first running frequency of described compressor is adjusted into described returningOil frequency. Concrete, compressor, can be according to the residing outdoor ring of compressor in the time carrying out oil returnBorder temperature and the first preset rules, determine the oil return frequency of compressor. Due to by thisThe oil return frequency of the compressor that one preset rules is determined is along with the variation of outdoor environment temperatureChange, so in the time that compressor is carried out to oil return control, in its oil return frequency and prior artThe oil return frequency difference arranging, is no longer a fixed value relevant with specified running frequency, therebyAlso just can, as prior art, in the time of compressor oil return, not cause damage to compressor. So,Compared with prior art, the method for controlling oil return that the embodiment of the present invention provides can effectively solve existingHaving while adopting fixing oil return frequency to carry out oil return control to frequency converting air-conditioner compressor causes compressor to be subject toThe problem of damaging. Further, by judging the mode of operation of convertible frequency air-conditioner, can be more accurateDetermine the optimum oil return frequency under different working modes, and by judging the work of compressorStage and compressor, at the continuous operating time being less than under predeterminated frequency, can also be determined pressureWhether contracting machine needs to carry out oil return under current running status, thereby realizes oil return more accuratelyControl.
The embodiment of the present invention provides a kind of oil return control device 60 of frequency converting air-conditioner compressor, asShown in Fig. 6, comprising: acquisition module 61, determination module 62, adjusting module 63.
Described acquisition module 61, for obtaining the first running frequency of compressor.
Described acquisition module 61, also for obtaining the residing outdoor environment temperature of described compressor.
Described determination module 62, for according to described outdoor environment temperature and the first preset rules,Determine the oil return frequency of described compressor, described the first preset rules comprises described outdoor environment temperatureThe corresponding relation of the oil return frequency of degree and described compressor.
Described adjusting module 63, described in being adjusted into the first running frequency of described compressorThe oil return frequency of compressor.
Optionally, as shown in Figure 7, described determination module 62, also for determining described compressorWorking stage, the startup stage that the working stage of described compressor comprising and the operation phase.
Described acquisition module 61, if the startup stage of for the working stage of described compressor being also time,Obtain the residing outdoor environment temperature of described compressor.
Optionally, as shown in Figure 7, described determination module 62, also for determining described compressorThe first running frequency whether be less than predeterminated frequency, described predeterminated frequency is less than described oil return frequency.
Described acquisition module 61, if described in being also less than for the first running frequency of described compressorWhen predeterminated frequency, obtain the continuous operating time of described compressor.
Whether described determination module 62 is also large for determining the continuous operating time of described compressorIn or equal the first Preset Time.
Described acquisition module 61, if be also greater than for the continuous operating time of described compressor or etc.In the time of the first Preset Time, obtain the residing outdoor environment temperature of described compressor.
Optionally, as shown in Figure 7, described determination module 62, also for determining described frequency conversion skyThe mode of operation of adjusting, described mode of operation comprises refrigeration mode and heating mode.
Described determination module 62, if be also refrigeration mode for the mode of operation of described convertible frequency air-conditionerTime, according to described outdoor environment temperature and the second preset rules, determine returning of described compressorOil frequency, described the second preset rules is included under described refrigeration mode, described outdoor environment temperatureThe corresponding relation of the oil return frequency of degree and described compressor.
Described determination module 62, if be also heating mode for the mode of operation of described convertible frequency air-conditionerTime, according to described outdoor environment temperature and the 3rd preset rules, determine returning of described compressorOil frequency, described the 3rd preset rules is included under described heating mode, described outdoor environment temperatureThe corresponding relation of the oil return frequency of degree and described compressor.
Optionally, as shown in Figure 7, described oil return control device 60 also comprises: control module 64.
Described control module 64, for controlling described compressor according to described oil return frequency operation theTwo Preset Times.
The embodiment of the present invention provides a kind of oil return control device of frequency converting air-conditioner compressor, this dressPut and comprise: acquisition module, determination module and adjusting module. Concrete, acquisition module can obtainGet the first running frequency of compressor and obtain the residing outdoor environment temperature of compressor; By reallyCover half piece, according to outdoor environment temperature and the first preset rules, is determined the oil return frequency of compressor;The last oil return frequency that by adjusting module, the first running frequency of compressor is adjusted into compressor.Because the oil return frequency of the compressor of determining by this first preset rules is along with outdoor environmentThe variation of temperature changes, so in the time that compressor is carried out to oil return control, its oil return frequencyDifferent with the oil return frequency arranging in prior art, be no longer only relevant with specified running frequencyFixed value, thereby also just can, as prior art, in the time of compressor oil return, compressor not madeBecome damage. So, compared with prior art, the method for controlling oil return that the embodiment of the present invention providesCan effectively solve the fixing oil return frequency of existing employing frequency converting air-conditioner compressor is carried out to oil return controlTime cause the impaired problem of compressor.
Disclosed system, dress, in the several embodiment that provide in the application, are providedPut and method, can realize by another way. For example, device described above is implementedExample is only that schematically for example, the division of described unit, only draws for a kind of logic functionPoint, when actual realization, can there is other dividing mode, for example multiple unit or assembly can be tiedClose or can be integrated into another system, or some features can ignore, or not carry out. SeparatelyA bit, shown or discussed coupling each other or direct-coupling or communication connection can beBy some interfaces, INDIRECT COUPLING or the communication connection of device or unit, can be electrically, machineTool or other form.
The described unit as separating component explanation can be or can not be also physically to separate, the parts that show as unit can be or can not be also physical location, can positionIn a place, or also can be distributed on multiple NEs. Can be according to actual needSelect some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, the each functional unit in each embodiment of the present invention can be integrated in a processingIn unit, can be also that the independent physics of unit comprises, also can two or more listsUnit is integrated in a unit. Above-mentioned integrated unit both can adopt the form of hardware to realize,The form that also can adopt hardware to add SFU software functional unit realizes.
The integrated unit that the above-mentioned form with SFU software functional unit realizes, can be stored in oneIn computer read/write memory medium. Above-mentioned SFU software functional unit is stored in a storage medium,Comprise some instructions in order to make a computer equipment (can be personal computer, server,Or the network equipment etc.) carry out the part steps of method described in the present invention each embodiment. And it is frontThe storage medium of stating comprises: USB flash disk, portable hard drive, read-only storage (Read-OnlyMemory,Be called for short ROM), random access memory (RandomAccessMemory, be called for short RAM),The various media that can be program code stored such as magnetic disc or CD.
Finally it should be noted that: above embodiment is only in order to technical scheme of the present invention to be described, andNon-to its restriction; Although the present invention is had been described in detail with reference to previous embodiment, abilityThe those of ordinary skill in territory is to be understood that: the skill that it still can be recorded aforementioned each embodimentArt scheme is modified, or part technical characterictic is wherein equal to replacement; And these are repaiiedChange or replace, not making the essence of appropriate technical solution depart from various embodiments of the present invention technical sideThe spirit and scope of case.
Claims (10)
1. a method for controlling oil return for frequency converting air-conditioner compressor, is characterized in that, comprising:
Obtain the first running frequency of compressor;
Obtain the residing outdoor environment temperature of described compressor;
According to described outdoor environment temperature and the first preset rules, determine returning of described compressorOil frequency, described the first preset rules comprises returning of described outdoor environment temperature and described compressorThe corresponding relation of oil frequency;
The first running frequency of described compressor is adjusted into described oil return frequency.
2. method according to claim 1, is characterized in that, at the described compressor that obtainsThe first running frequency after, described method also comprises:
Determine the working stage of described compressor, the working stage of described compressor comprises startup rankSection and operation phase;
The described residing outdoor environment temperature of described compressor that obtains comprises: if described compressorThe startup stage that working stage being, obtain the residing outdoor environment temperature of described compressor.
3. method according to claim 2, is characterized in that, if the work of described compressorAs the stage be the operation phase, described method also comprises:
Whether the first running frequency of determining described compressor is less than predeterminated frequency, described default frequencyRate is less than described oil return frequency;
If the first running frequency of described compressor is less than described predeterminated frequency, obtain described pressureThe continuous operating time of contracting machine;
Whether the continuous operating time of determining described compressor is more than or equal to the first Preset Time;
The described residing outdoor environment temperature of described compressor that obtains comprises: if described compressorContinuous operating time is more than or equal to described the first Preset Time, obtains described compressor of living inOutdoor environment temperature.
4. according to the method described in any one in claim 1-3, it is characterized in that, describedAfter obtaining the residing outdoor environment temperature of described compressor, described method also comprises:
Determine the mode of operation of described convertible frequency air-conditioner, described mode of operation comprises refrigeration mode and systemHeat pattern;
If the mode of operation of described convertible frequency air-conditioner is refrigeration mode, according to described outdoor environment temperatureSpend and the second preset rules, determine the oil return frequency of described compressor, the described second default ruleBe included under described refrigeration mode, the oil return of described outdoor environment temperature and described compressor frequentlyThe corresponding relation of rate;
If the mode of operation of described convertible frequency air-conditioner is heating mode, according to described outdoor environment temperatureSpend and the 3rd preset rules, determine the oil return frequency of described compressor, the described the 3rd default ruleBe included under described heating mode, the oil return of described outdoor environment temperature and described compressor frequentlyThe corresponding relation of rate.
5. method according to claim 4, is characterized in that, described by described compressorThe first running frequency be adjusted into the oil return frequency of described compressor after, described method also comprises:
Control described compressor and move the second Preset Time according to described oil return frequency.
6. an oil return control device for frequency converting air-conditioner compressor, is characterized in that, comprising: obtainDelivery piece, determination module, adjusting module;
Described acquisition module, for obtaining the first running frequency of compressor;
Described acquisition module, also for obtaining the residing outdoor environment temperature of described compressor;
Described determination module, for according to described outdoor environment temperature and the first preset rules,Determine the oil return frequency of described compressor, described the first preset rules comprises described outdoor environment temperatureThe corresponding relation of the oil return frequency of degree and described compressor;
Described adjusting module, for being adjusted into described pressure by the first running frequency of described compressorThe oil return frequency of contracting machine.
7. device according to claim 6, is characterized in that,
Described determination module, also for determining the working stage of described compressor, described compressorWorking stage comprise startup stage and the operation phase;
Described acquisition module, if the startup stage of for the working stage of described compressor being also time,Obtain the residing outdoor environment temperature of described compressor.
8. device according to claim 7, is characterized in that,
Whether described determination module, be also less than for the first running frequency of determining described compressorPredeterminated frequency, described predeterminated frequency is less than described oil return frequency;
Described acquisition module, if be also less than described pre-for the first running frequency of described compressorIf when frequency, obtain the continuous operating time of described compressor;
Whether described determination module, be also greater than for the continuous operating time of determining described compressorOr equal the first Preset Time;
Described acquisition module, if be also more than or equal to for the continuous operating time of described compressorWhen the first Preset Time, obtain the residing outdoor environment temperature of described compressor.
9. according to the device described in any one in claim 6-8, it is characterized in that,
Described determination module, also for determining the mode of operation of described convertible frequency air-conditioner, described workPattern comprises refrigeration mode and heating mode;
Described determination module, if while being also refrigeration mode for the mode of operation of described convertible frequency air-conditioner,According to described outdoor environment temperature and the second preset rules, determine the oil return of described compressor frequentlyRate, described the second preset rules is included under described refrigeration mode, described outdoor environment temperature withThe corresponding relation of the oil return frequency of described compressor;
Described determination module, if while being also heating mode for the mode of operation of described convertible frequency air-conditioner,According to described outdoor environment temperature and the 3rd preset rules, determine the oil return of described compressor frequentlyRate, described the 3rd preset rules is included under described heating mode, described outdoor environment temperature withThe corresponding relation of the oil return frequency of described compressor.
10. device according to claim 9, is characterized in that, described device also comprises:Control module;
Described control module, for controlling described compressor according to described oil return frequency operation secondPreset Time.
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| CN201410755800.4A CN105588384B (en) | 2014-12-10 | 2014-12-10 | The method for controlling oil return and device of a kind of frequency converting air-conditioner compressor |
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