CN107339836B - Frequency converter unit and oil return control method and device thereof - Google Patents
Frequency converter unit and oil return control method and device thereof Download PDFInfo
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- CN107339836B CN107339836B CN201710444042.8A CN201710444042A CN107339836B CN 107339836 B CN107339836 B CN 107339836B CN 201710444042 A CN201710444042 A CN 201710444042A CN 107339836 B CN107339836 B CN 107339836B
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000000465 moulding Methods 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 186
- 238000005057 refrigeration Methods 0.000 description 20
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 235000003642 hunger Nutrition 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000037351 starvation Effects 0.000 description 2
- 239000010729 system oil Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a frequency converter unit and an oil return control method and device thereof, wherein the method comprises the following steps: acquiring the actual operating frequency of the frequency conversion unit; comparing the obtained actual operation frequency with a preset optimal oil return frequency of the unit, and determining the deviation degree of the actual operation frequency and the optimal oil return frequency; and generating a control signal for controlling the on-off of an oil return electromagnetic valve of the frequency conversion unit according to the deviation degree so as to control the oil return of the frequency conversion unit. The invention ensures the oil return reliability of the frequency converter unit and reduces the cold loss caused by the air leakage of the high-pressure side and the low-pressure side of the unit through the oil return capillary during the high-frequency operation.
Description
Technical field
The present invention relates to air-conditioning technical fields, in particular to a kind of frequency converter sets and its method for controlling oil return, dress
It sets.
Background technique
If frequency conversion refrigeration unit cooling medium charging amount is more at present, few oil or oil starvation in compressor will be caused, compressor is caused
Reliability reduces.Oil eliminator is set in unit, the refrigeration oil come out with exhaust can be come back to compressor by capillary
Air entry is effectively ensured refrigeration system oil return reliability, improves the service life of compressor.But oil return capillary inhales compressor
Port is connected to exhaust outlet, and under unit high frequency operating status, on high-tension side gas is easier to make with refrigeration oil string to low-pressure side
At refrigeration unit part loss of refrigeration capacity.
For in frequency conversion refrigeration unit high frequency operational process in the related technology, unit high pressure and low-pressure side pass through oil return capillary
The problem of loss of refrigeration capacity caused by pipe is collaborated, not yet proposes to efficiently solve scheme at present.
Summary of the invention
The present invention provides a kind of frequency converter sets and its method for controlling oil return, device, at least to solve to become in the prior art
In frequency refrigeration unit high frequency operational process, loss of refrigeration capacity caused by unit high pressure and low-pressure side are collaborated by oil return capillary is asked
Topic.
In order to solve the above technical problems, the present invention provides a kind of frequency changers according to the one aspect of the embodiment of the present disclosure
Group method for controlling oil return, this method comprises: obtaining the actual motion frequency Fs of frequency converter sets；The actual motion frequency Fs that will acquire
Optimal oil return frequency Fy is preset with unit to be compared, and determines the deviation journey of actual motion frequency Fs Yu optimal oil return frequency Fy
Degree；The control signal of the on-off of control frequency converter sets oil return solenoid valve is generated, according to departure degree to control returning for frequency converter sets
Oil.
Further, the control signal of the on-off of control frequency converter sets oil return solenoid valve is generated, according to departure degree with control
The oil return of frequency converter sets processed, comprising: obtain unit predeterminated frequency and control precision；Determining departure degree and predeterminated frequency are controlled
Precision is compared, and the control signal of the on-off of control frequency converter sets oil return solenoid valve is generated according to comparison result.
Further, the unit predeterminated frequency control precision of acquisition includes: universal frequency control precision △ f, will be determining
Departure degree is compared with predeterminated frequency control precision, generates the logical of control frequency converter sets oil return solenoid valve according to comparison result
Disconnected control signal, comprising: be greater than or equal in actual motion frequency Fs and preset optimal oil return frequency Fy and universal frequency control
When the sum of precision △ f, the first control signal for controlling the disconnection of frequency converter sets oil return solenoid valve is generated；In actual motion frequency
When rate Fs is less than the difference for presetting optimal oil return frequency Fy and universal frequency control precision △ f, generates and returned for controlling frequency converter sets
The second control signal of the conducting of solenoid.
Further, the unit predeterminated frequency control precision of acquisition includes: the upper control of oil return frequency precision △ f1, lower oil return
Frequency controls precision △ f2, and determining departure degree is compared with predeterminated frequency control precision, is generated according to comparison result
Control the control signal of the on-off of frequency converter sets oil return solenoid valve, comprising: be greater than or equal in actual motion frequency Fs and preset most
When the sum of excellent oil return frequency Fy and upper oil return frequency control precision △ f1, generate for controlling the disconnected of frequency converter sets oil return solenoid valve
The first control signal opened；It is less than in actual motion frequency Fs and presets optimal oil return frequency Fy and lower oil return frequency control precision △
When the difference of f2, the second control signal for controlling the conducting of frequency converter sets oil return solenoid valve is generated.
According to the another aspect of the embodiment of the present disclosure, a kind of frequency converter sets oil return control device is provided, which includes:
Acquiring unit, for obtaining the actual motion frequency Fs of frequency converter sets；Comparing unit, the actual motion frequency Fs for will acquire
Optimal oil return frequency Fy is preset with unit to be compared, and determines the deviation journey of actual motion frequency Fs Yu optimal oil return frequency Fy
Degree；Control unit, the control signal of the on-off for generating control frequency converter sets oil return solenoid valve according to departure degree, with control
The oil return of frequency converter sets.
Further, control unit includes: acquisition module, for obtaining unit predeterminated frequency control precision；Compare control
Module generates control frequency conversion according to comparison result for being compared the departure degree determined with predeterminated frequency control precision
The control signal of the on-off of unit oil return solenoid valve.
Further, obtaining the unit predeterminated frequency control precision that module obtains includes: universal frequency control precision △ f,
Comparing control module includes: the first control submodule, presets optimal oil return frequency for being greater than or equal in actual motion frequency Fs
When the sum of rate Fy and universal frequency control precision △ f, the first control of the disconnection for controlling frequency converter sets oil return solenoid valve is generated
Signal processed；Second control submodule presets optimal oil return frequency Fy and universal frequency control for being less than in actual motion frequency Fs
When the difference of precision △ f processed, the second control signal for controlling the conducting of frequency converter sets oil return solenoid valve is generated.
Further, obtaining the unit predeterminated frequency control precision that module obtains includes: upper oil return frequency control precision △
F1, lower oil return frequency control precision △ f2, and comparing control module includes: third control submodule, in actual motion frequency
When Fs is more than or equal to the sum of optimal oil return frequency Fy and upper oil return frequency control precision △ f1 is preset, generate for controlling frequency conversion
The first control signal of the disconnection of unit oil return solenoid valve；4th control submodule, it is pre- for being less than in actual motion frequency Fs
If generating when the difference of optimal oil return frequency Fy and lower oil return frequency control precision △ f2 for controlling frequency converter sets oil return solenoid valve
Conducting second control signal.
According to the another aspect of the embodiment of the present disclosure, a kind of frequency converter sets are provided, comprising:
Compressor, compressor have exhaust outlet and gas returning port；
The exhaust outlet of oil eliminator, the first interface of oil eliminator and compressor connects, the second interface of oil eliminator with
The gas returning port of compressor connects；
Condenser, the first end of condenser and the third interface of oil eliminator connect；
Evaporator, the first end of evaporator and the second end of condenser connect, the second end of evaporator and returning for compressor
Port connection；
Throttle valve, throttle valve are connected between condenser and evaporator；
Oil return solenoid valve, oil return solenoid valve and capillary are connected on the second interface of oil eliminator and the gas returning port of compressor
Between；
Controller, controller are connect with oil return solenoid valve electric signal, for unit actual motion frequency Fs and unit is pre-
If optimal oil return frequency Fy is compared, the departure degree of actual motion frequency Fs Yu optimal oil return frequency Fy are determined, and according to
Departure degree generates the control signal of the on-off of control oil return solenoid valve, to control the oil return of frequency converter sets.
According to the another aspect of the embodiment of the present disclosure, a kind of computer readable storage medium is provided, this is computer-readable
Storage medium is stored with one or more program, one or more program can be executed by one or more processor, with
Realize above-mentioned frequency converter sets method for controlling oil return.
In the present invention, it according to the departure degree of unit actual motion frequency and preset optimal oil return frequency, controls back
The opening and closing of solenoid reduces unit high pressure and low in high frequency operational process while guaranteeing frequency converter sets oil return reliability
It is collaborated caused loss of refrigeration capacity by oil return capillary pressure side.
Detailed description of the invention
Fig. 1 is a kind of optional flow chart of frequency converter sets method for controlling oil return according to an embodiment of the present invention；
Fig. 2 is a kind of optional structural schematic diagram of frequency converter sets according to an embodiment of the present invention；And
Fig. 3 is a kind of optional structural block diagram of frequency converter sets oil return control device according to an embodiment of the present invention.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Embodiment 1
Frequency converter sets method for controlling oil return provided by the invention is illustrated with reference to the accompanying drawing.
Frequency converter sets method for controlling oil return provided by the invention can be applied in frequency converter sets equipment, such as: household becomes
Convertible frequency air-conditioner etc. on frequency air-conditioning, market or ship can be by installing software or in unit master control when realizing in equipment
The mode that corresponding control program is written on device is realized, as shown in Figure 1, the frequency converter sets method for controlling oil return may include following step
Rapid S102-S106:
S102 obtains the actual motion frequency Fs of frequency converter sets；
S104, the actual motion frequency Fs that will acquire preset optimal oil return frequency Fy with unit and are compared, and determine practical
The departure degree of running frequency Fs and optimal oil return frequency Fy；
S106 generates the control signal of the on-off of control frequency converter sets oil return solenoid valve according to departure degree, is become with controlling
The oil return of frequency unit.
If frequency conversion refrigeration unit cooling medium charging amount is more at present, few oil or oil starvation in compressor will be caused, compressor is caused
Reliability reduces.Oil eliminator is set in unit, the refrigeration oil come out with exhaust can be come back to compressor by capillary
Air entry is effectively ensured refrigeration system oil return reliability, improves the service life of compressor.But oil return capillary inhales compressor
Port is connected to exhaust outlet, and under unit high frequency operating status, on high-tension side gas is easier to make with refrigeration oil string to low-pressure side
At refrigeration unit part loss of refrigeration capacity.
In the above-described embodiment, according to the departure degree of unit actual motion frequency and preset optimal oil return frequency,
It is high to reduce unit in high frequency operational process while guaranteeing frequency converter sets oil return reliability for the opening and closing for controlling oil return solenoid valve
Pressure and low-pressure side are collaborated caused loss of refrigeration capacity by oil return capillary.
When specific implementation, the control of the above-mentioned on-off that control frequency converter sets oil return solenoid valve is generated according to departure degree is believed
Number, it may include: to obtain unit predeterminated frequency control precision to control the oil return of frequency converter sets；By determining departure degree with
Predeterminated frequency control precision is compared, and is believed according to the control that comparison result generates the on-off of control frequency converter sets oil return solenoid valve
Number.
In one preferred embodiment, the unit predeterminated frequency control precision of above-mentioned acquisition includes: universal frequency control
Precision △ f processed, it is preferable that determining departure degree is compared with predeterminated frequency control precision, is generated according to comparison result
Control the control signal of the on-off of frequency converter sets oil return solenoid valve, comprising: be greater than or equal in actual motion frequency Fs and preset most
When the sum of excellent oil return frequency Fy and universal frequency control precision △ f, the disconnection for controlling frequency converter sets oil return solenoid valve is generated
First control signal；Actual motion frequency Fs be less than preset optimal oil return frequency Fy and universal frequency control precision △ f it
When poor, the second control signal for controlling the conducting of frequency converter sets oil return solenoid valve is generated.
That is, setting the optimal oil return frequency Fy of unit and universal frequency control essence in above embodiment of the invention
Spend △ f.When detecting actual motion frequency Fs >=Fy+ △ f, that is, determine that oil return reliability is higher, controller sends the first control
Signal-off oil return solenoid valve processed；When detecting actual motion frequency Fs < Fy- △ f, that is, determine that oil return reliability is lower, control
Device processed sends second control signal and opens oil return solenoid valve, improves unit oil return reliability.Essence is controlled by setting universal frequency
Spend the start-stop time (start-stop time of oil return solenoid valve can be reduced when △ f > 0) of △ f control oil return solenoid valve, it is ensured that oil return electricity
The service life of magnet valve.
In another preferred embodiment, the unit predeterminated frequency control precision of above-mentioned acquisition includes: upper oil return frequency
Rate controls precision △ f1, lower oil return frequency controls precision △ f2, it is preferable that determining departure degree and predeterminated frequency are controlled essence
Degree is compared, and the control signal of the on-off of control frequency converter sets oil return solenoid valve is generated according to comparison result, comprising: in reality
When running frequency Fs is more than or equal to the sum of optimal oil return frequency Fy and upper oil return frequency control precision △ f1 is preset, generation is used for
Control the first control signal of the disconnection of frequency converter sets oil return solenoid valve；It is less than in actual motion frequency Fs and presets optimal oil return frequency
When the difference of rate Fy and lower oil return frequency control precision △ f2, second for controlling the conducting of frequency converter sets oil return solenoid valve is generated
Control signal.
That is, setting the optimal oil return frequency Fy of unit, the control of upper oil return frequency in above embodiment of the invention
Precision △ f1, lower oil return frequency control precision △ f2, are compared to single setting universal frequency control precision △ f, in setting
Oil return frequency control precision △ f1, lower oil return frequency control two control precision parameters of precision △ f2 keep unit allocation more smart
Really.When detecting actual motion frequency Fs >=Fy+ △ f1, that is, determine that oil return reliability is higher, controller sends the first control
Signal-off oil return solenoid valve；When detecting actual motion frequency Fs < Fy- △ f2, that is, determine that oil return reliability is lower, control
Device processed sends second control signal and opens oil return solenoid valve, improves unit oil return reliability.Essence is controlled by setting universal frequency
The start-stop time that degree △ f1, △ f2 control oil return solenoid valve (can reduce the start and stop time of oil return solenoid valve when △ f1 > 0, △ f2 > 0
Number), it is ensured that the service life of oil return solenoid valve.
The embodiment of the above-mentioned offer of the application is compared and analyzed with the prior art below, to better understand this
Application:
There is the trigger condition by detection oil level control as oil return in the oil return control mode of the prior art, but practical
The not all system of oil level detection function, which is all had ready conditions, in use has, and for frequency converter sets, is used as back by frequency
Oily trigger condition is simple and effective.Oil return control mode in the prior art is mostly the oil return controlling party of low-frequency operation system
Case, when reaching oil return condition forced adjustment frequency be oil return frequency, and frequency converter sets in actual use frequency according to bear
Lotus adjusts the power savings advantages that could play frequency converter sets to greatest extent in real time, and the application guarantees frequency basis in any case
Load is adjusted, and oil return is individual control system, is only triggered according to frequency, does not influence the actual operation of unit
Frequency.
In above-mentioned each embodiment, according to the departure degree of unit actual motion frequency and optimal oil return frequency, control
The switch of oil return solenoid valve processed.During maintaining upper frequency operation, oil return reliability is higher, closes oil return solenoid valve to unit
Oil return reliability do not influence substantially.When unit maintains lower frequency operation, refrigerant circulation is few in system, oil return reliability
It is poor, therefore oil return solenoid valve is opened, improve oil return reliability.And during high frequency is run, coolant quantity is more in system, flow velocity
Comparatively fast, it is easier to high-pressure side refrigerant occur and loss of refrigeration capacity is caused by oil return pipe string to low-pressure side, therefore be closed when high frequency operation
Oil return solenoid valve will not only reduce oil return reliability, but also avoid high and low pressure side and collaborate caused loss of refrigeration capacity.
Embodiment 2
The frequency converter sets method for controlling oil return provided in 1 based on the above embodiment, optional embodiment 2 of the present invention also provide
A kind of frequency converter sets, specifically, Fig. 2 shows a kind of optional structural schematic diagrams of the frequency converter sets, as shown in Fig. 2, should
Frequency converter sets include:
Compressor, compressor have exhaust outlet and gas returning port；
Oil eliminator (oil), the first interface of oil eliminator and the exhaust outlet of compressor connect, and the second of oil eliminator
The connection of the gas returning port of interface and compressor；
Condenser, the first end of condenser and the third interface of oil eliminator connect；
Evaporator, the first end of evaporator and the second end of condenser connect, the second end of evaporator and returning for compressor
Port connection；
Throttle valve, throttle valve are connected between condenser and evaporator；
Oil return solenoid valve, oil return solenoid valve and capillary are connected on the second interface of oil eliminator and the gas returning port of compressor
Between；
Controller (is not shown) in Fig. 2, and controller is connect with oil return solenoid valve electric signal, is used for unit actual motion frequency
Rate Fs presets optimal oil return frequency Fy with unit and is compared, and determines the deviation of actual motion frequency Fs Yu optimal oil return frequency Fy
Degree, and the control signal for controlling the on-off of oil return solenoid valve is generated according to departure degree, to control the oil return of frequency converter sets.
The frequency converter sets oil return controlling party recorded in the method such as embodiment 1 of the on-off of controller control oil return solenoid valve
Method, details are not described herein again.
Embodiment 3
The frequency converter sets method for controlling oil return provided in 1 based on the above embodiment, optional embodiment 3 of the present invention also provide
A kind of frequency converter sets oil return control device, specifically, Fig. 3 shows a kind of optional structural block diagram of the device, such as Fig. 3 institute
Show, which includes: acquiring unit 32, for obtaining the actual motion frequency Fs of frequency converter sets；Than
It compared with unit 34, is connect with acquiring unit 32, the actual motion frequency Fs for will acquire and unit preset optimal oil return frequency Fy
It is compared, determines the departure degree of actual motion frequency Fs Yu optimal oil return frequency Fy；Control unit 36, with comparing unit 34
Connection, the control signal of the on-off for generating control frequency converter sets oil return solenoid valve according to departure degree, to control frequency changer
The oil return of group.
Further, control unit includes: acquisition module, for obtaining unit predeterminated frequency control precision；Compare control
Module generates control frequency conversion according to comparison result for being compared the departure degree determined with predeterminated frequency control precision
The control signal of the on-off of unit oil return solenoid valve.
Further, obtaining the unit predeterminated frequency control precision that module obtains includes: universal frequency control precision △ f,
Comparing control module includes: the first control submodule, presets optimal oil return frequency for being greater than or equal in actual motion frequency Fs
When the sum of rate Fy and universal frequency control precision △ f, the first control of the disconnection for controlling frequency converter sets oil return solenoid valve is generated
Signal processed；Second control submodule presets optimal oil return frequency Fy and universal frequency control for being less than in actual motion frequency Fs
When the difference of precision △ f processed, the second control signal for controlling the conducting of frequency converter sets oil return solenoid valve is generated.
Further, obtaining the unit predeterminated frequency control precision that module obtains includes: upper oil return frequency control precision △
F1, lower oil return frequency control precision △ f2, and comparing control module includes: third control submodule, in actual motion frequency
When Fs is more than or equal to the sum of optimal oil return frequency Fy and upper oil return frequency control precision △ f1 is preset, generate for controlling frequency conversion
The first control signal of the disconnection of unit oil return solenoid valve；4th control submodule, it is pre- for being less than in actual motion frequency Fs
If generating when the difference of optimal oil return frequency Fy and lower oil return frequency control precision △ f2 for controlling frequency converter sets oil return solenoid valve
Conducting second control signal.
About the device in above-described embodiment, wherein each unit, module execute the concrete mode of operation related
It is described in detail in the embodiment of this method, no detailed explanation will be given here.
Embodiment 4
The frequency converter sets method for controlling oil return provided in 1 based on the above embodiment, optional embodiment 4 of the present invention also provide
A kind of computer readable storage medium, the computer-readable recording medium storage have one or more program, one or
Multiple programs can be executed by one or more processor, to realize above-mentioned frequency converter sets method for controlling oil return.
Recorded in the specific implementation such as embodiment 1 of above-mentioned frequency converter sets method for controlling oil return, herein no longer
It is repeated.
It can be seen from the foregoing description that in the embodiment of each embodiment of the application, according to the practical fortune of unit
The departure degree of line frequency and preset optimal oil return frequency, controls the opening and closing of oil return solenoid valve, is guaranteeing frequency converter sets oil return
While reliability, cooling capacity caused by unit high pressure and low-pressure side are collaborated by oil return capillary in reduction high frequency operational process is damaged
It loses.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
The common knowledge in the art that person's adaptive change follows general principle of the invention and do not invent including the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (3)
1. a kind of frequency converter sets method for controlling oil return characterized by comprising
Obtain the actual motion frequency Fs of frequency converter sets；
The actual motion frequency Fs that will acquire presets optimal oil return frequency Fy with unit and is compared, and determines the practical fortune
The departure degree of line frequency Fs and the optimal oil return frequency Fy；
The control signal for controlling the on-off of the frequency converter sets oil return solenoid valve is generated according to the departure degree, described in control
The oil return of frequency converter sets；
It is described that the control signal for controlling the on-off of the frequency converter sets oil return solenoid valve is generated according to the departure degree, with control
The oil return of the frequency converter sets, comprising:
It obtains unit predeterminated frequency and controls precision；
The determining departure degree is compared with predeterminated frequency control precision, control institute is generated according to comparison result
State the control signal of the on-off of frequency converter sets oil return solenoid valve；
The unit predeterminated frequency control precision of acquisition includes: universal frequency control precision △ f, described by the determining deviation journey
Degree is compared with predeterminated frequency control precision, is generated according to comparison result and is controlled the frequency converter sets oil return solenoid valve
The control signal of on-off, comprising:
Optimal oil return frequency Fy and universal frequency control essence are preset more than or equal to described in the actual motion frequency Fs
When spending the sum of △ f, the first control signal for controlling the disconnection of the frequency converter sets oil return solenoid valve is generated；
The actual motion frequency Fs be less than it is described preset optimal oil return frequency Fy and the universal frequency control precision △ f it
When poor, the second control signal for controlling the conducting of the frequency converter sets oil return solenoid valve is generated；
Alternatively, the unit predeterminated frequency control precision obtained includes: upper oil return frequency control precision △ f1, the control of lower oil return frequency
Precision △ f2, it is described to be compared the determining departure degree with predeterminated frequency control precision, according to comparison result
Generate the control signal for controlling the on-off of the frequency converter sets oil return solenoid valve, comprising:
Optimal oil return frequency Fy and the upper oil return frequency control are preset more than or equal to described in the actual motion frequency Fs
When the sum of precision △ f1, the first control signal for controlling the disconnection of the frequency converter sets oil return solenoid valve is generated；
Optimal oil return frequency Fy and the lower oil return frequency control precision △ are preset less than described in the actual motion frequency Fs
When the difference of f2, the second control signal for controlling the conducting of the frequency converter sets oil return solenoid valve is generated.
2. a kind of frequency converter sets oil return control device characterized by comprising
Acquiring unit, for obtaining the actual motion frequency Fs of frequency converter sets；
Comparing unit, the actual motion frequency Fs for will acquire preset optimal oil return frequency Fy with unit and are compared,
Determine the departure degree of the actual motion frequency Fs Yu the optimal oil return frequency Fy；
Control unit, the control for generating the on-off for controlling the frequency converter sets oil return solenoid valve according to the departure degree are believed
Number, to control the oil return of the frequency converter sets；
Described control unit includes:
Module is obtained, for obtaining unit predeterminated frequency control precision；
Compare control module, for the departure degree determined to be compared with predeterminated frequency control precision, according to
Comparison result generates the control signal for controlling the on-off of the frequency converter sets oil return solenoid valve；
The unit predeterminated frequency control precision for obtaining module acquisition includes: universal frequency control precision △ f, described relatively to control
Molding block includes:
First control submodule, for the actual motion frequency Fs be greater than or equal to it is described preset optimal oil return frequency Fy with
When the sum of described universal frequency control precision △ f, first for controlling the disconnection of the frequency converter sets oil return solenoid valve is generated
Control signal；
Second control submodule, for being less than the optimal oil return frequency Fy and described logical of presetting in the actual motion frequency Fs
When controlling the difference of precision △ f with frequency, the second control letter of the conducting for controlling the frequency converter sets oil return solenoid valve is generated
Number；
Alternatively, it is described obtain the unit predeterminated frequency control precision that module obtains include: upper oil return frequency control precision △ f1, under
Oil return frequency controls precision △ f2, and the relatively control module includes:
Third control submodule, for the actual motion frequency Fs be greater than or equal to it is described preset optimal oil return frequency Fy with
When the sum of described upper oil return frequency control precision △ f1, the of the disconnection for controlling the frequency converter sets oil return solenoid valve is generated
One control signal；
4th control submodule, for the actual motion frequency Fs be less than it is described preset optimal oil return frequency Fy and it is described under
When oil return frequency controls the difference of precision △ f2, the second control of the conducting for controlling the frequency converter sets oil return solenoid valve is generated
Signal.
3. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage have one or
Multiple programs, one or more of programs can be executed by one or more processor, described in claim 1 to realize
Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710444042.8A CN107339836B (en) | 2017-06-13 | 2017-06-13 | Frequency converter unit and oil return control method and device thereof |
Applications Claiming Priority (1)
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