CN109373635A - A kind of air conditioner oil returning control method, device and air conditioner - Google Patents
A kind of air conditioner oil returning control method, device and air conditioner Download PDFInfo
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- CN109373635A CN109373635A CN201811269572.4A CN201811269572A CN109373635A CN 109373635 A CN109373635 A CN 109373635A CN 201811269572 A CN201811269572 A CN 201811269572A CN 109373635 A CN109373635 A CN 109373635A
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- oil
- oil return
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- air conditioner
- compressor
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- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
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- 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
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- 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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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention provides a kind of air conditioner oil returning control method, device and air conditioner, the air conditioner oil returning control method includes the opens solenoid valve progress oil return when the oil drain quantity in oil eliminator reaches preset value；Obtain temperature after the oil return of the oil return capillary；Solenoid valve, which is closed, when temperature and preset theoretical returning-oil temperature meet preset condition after the oil return stops oil return.By carrying out detection conversion to the oil mass in oil eliminator, when the oil mass in oil eliminator reaches threshold value, opens solenoid valve carries out oil return by oil return capillary, temperature after oil return by monitoring oil return capillary, and practical returning-oil temperature is compared with theoretical returning-oil temperature, it can effectively judge that refrigerant passes through oil return capillary, to which solenoid valve be closed when refrigerant is by oil return capillary, refrigerant more than avoiding passing through bypasses back compressor by oil return capillary and does lost work, to improve operation effect of air conditioner unit, energy consumption is reduced.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of air conditioner oil returning control method, device and air conditioner.
Background technique
As economic is constantly progressive, the application of air conditioner is also more and more extensive, since air conditioner can be by regulation room
Environment temperature brings comfortable experience for user, and air conditioner becomes most commonly seen one of household electrical appliance.
For frequency-conversion air-conditioning system, in order to protect the reliability of compressor, generally all it is configured with oil eliminator and returns
Oily capillary.In use, oil return capillary is all to maintain normal open state, this necessarily causes under many operating statuses, refrigerant
Compressor can be returned to by oil return capillary, cause waist performance, power consumption to increase, reduce the operational energy efficiency of unit.
Summary of the invention
In view of this, the present invention is directed to propose a kind of air conditioner oil returning control method, device and air conditioner, above-mentioned to improve
The problem of.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
In a first aspect, the air conditioner oil returning control method is answered the present invention provides a kind of air conditioner oil returning control method
For air conditioner, the air conditioner includes compressor, oil eliminator, solenoid valve and oil return capillary, and oil return capillary passes through electricity
Magnet valve is communicated with the oil separator, and the air conditioner oil returning control method includes:
When the oil drain quantity in oil eliminator reaches preset value, opens solenoid valve carries out oil return；
Obtain temperature after the oil return of the oil return capillary；
Solenoid valve is closed when temperature and preset theoretical returning-oil temperature meet preset condition after the oil return to stop
Oil return.
Further, in step when the oil drain quantity in oil eliminator reaches preset value opens solenoid valve carry out oil return it
Before, which comprises
According to the continuous working period of the oil extraction rate of compressor, the running frequency of compressor and compressor, according to formula
L1=a*A* (f1*t1+f2*t2+…fn*tn) the external oil drain quantity L of compressor is calculated1, wherein L1For the external of compressor
Oil drain quantity, a are overall efficiency coefficient, and A is the oil extraction rate of compressor, fnRefer to the running frequency of compressor, tnRefer to compressor with frequency
fnThe time of operation.
Further, the method also includes:
Obtain the operation high pressure and delivery temperature of outdoor machine of air-conditioner；
According to the length of oil return capillary, the operation high pressure of outdoor machine of air-conditioner and delivery temperature according to formula: Toil'=C1*
X+C2*Y+C3*Z+C4Calculate theoretical returning-oil temperature Toil', wherein X is the delivery temperature of the outdoor machine of air-conditioner, and Y is the air-conditioning
The operation high pressure of outer machine, Z are the length of oil return capillary, C1、C2、C3And C4To be preset according to the heat-transfer character of refrigerant
Constant coefficient.
Further, opens solenoid valve progress oil return is specifically wrapped when the oil drain quantity when in oil eliminator reaches preset value
It includes: as the external oil drain quantity L that compressor is calculated1When greater than L, opens solenoid valve carries out oil return, and wherein L is according to compressor
Reliability setting oil extraction threshold value.
Further, the pass when temperature after the oil return and preset theoretical returning-oil temperature meet preset condition
Closing the step of solenoid valve stops oil return includes:
The temperature T after oil returnoilMeet T with the theoretical returning-oil temperature being calculatedoil':
When, solenoid valve is closed, stops oil return to prevent refrigerant from flowing out by oil return capillary, whereinFor the parameter set according to the separative efficiency of oil eliminator,
Second aspect, the present invention provides a kind of air conditioner oil returning control device, the air conditioner oil returning control device packet
It includes:
Temperature acquiring unit, temperature after the oil return for obtaining the oil return capillary；
Start oil return unit, for the opens solenoid valve progress oil return when the oil drain quantity in oil eliminator reaches preset value；
Stop oil return unit, meets preset condition for the temperature after oil return and preset theoretical returning-oil temperature
When close solenoid valve stop oil return.
Further, the air conditioner oil returning control device includes: oil drain quantity computing unit, for the row according to compressor
The continuous working period of oil cut rate, the running frequency of compressor and compressor, according to formula L1=a*A* (f1*t1+f2*t2+…
fn*tn) the external oil drain quantity L of compressor is calculated1, wherein L1For the external oil drain quantity of compressor, a is overall efficiency system
Number, fnRefer to the running frequency of compressor, tnRefer to compressor with frequency fnThe time of operation.
Further, the air conditioner oil returning control device includes temperature calculation unit, and the temperature calculation unit is used for
According to the length of oil return capillary, the operation high pressure of outdoor machine of air-conditioner and delivery temperature according to formula: Toil'=C1*X+C2*Y+
C3*Z+C4Calculate theoretical returning-oil temperature Toil', wherein X is the delivery temperature of the outdoor machine of air-conditioner, and Y is the fortune of the outdoor machine of air-conditioner
Horizontal high voltage, Z are the length of oil return capillary, C1、C2、C3And C4For the preset constant system of heat-transfer character according to refrigerant
Number.
Further, the starting oil return unit is used for as the external oil drain quantity L that compressor is calculated1When greater than L, open
It opens solenoid valve and carries out oil return, wherein L is the oil extraction threshold value set according to the reliability of compressor；The stopping oil return unit is used for
The temperature T after oil returnoilMeet T with the theoretical returning-oil temperature being calculatedoil':When, solenoid valve is closed,
Stop oil return, whereinFor the parameter set according to the separative efficiency of oil eliminator,
The third aspect, the present invention also provides a kind of air conditioner, the air conditioner includes:
Memory, controller and air conditioner oil returning control device, the air conditioner oil returning control device are installed on described deposit
Reservoir and the software function module executed including one or more by the controller, the air conditioner oil returning control device packet
It includes:
Temperature acquiring unit, temperature after the oil return for obtaining the oil return capillary；
Start oil return unit, for the opens solenoid valve progress oil return when the oil drain quantity in oil eliminator reaches preset value；
Stop oil return unit, meets preset condition for the temperature after oil return and preset theoretical returning-oil temperature
When close solenoid valve stop oil return.
Compared with the existing technology, a kind of air conditioner oil returning control method, device and air conditioner of the present invention have with
Lower advantage:
The present invention program is by carrying out detection conversion to the oil mass in oil eliminator, when the oil mass in oil eliminator reaches threshold
Opens solenoid valve carries out oil return by oil return capillary when value, temperature after the oil return by monitoring oil return capillary, and by oil return
Temperature is compared with theoretical returning-oil temperature afterwards, can effectively judge refrigerant by oil return capillary, thus in refrigerant
By closing solenoid valve when oil return capillary, avoids passing through more refrigerants compressor is bypassed back by oil return capillary and do nothing
Function is imitated, to improve the operational energy efficiency of air conditioner unit.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic block diagram of air conditioner described in the embodiment of the present invention；
Fig. 2 is the flow chart of air conditioner oil returning control method described in the embodiment of the present invention.
Fig. 3 is the flow chart provided in an embodiment of the present invention for calculating theoretical returning-oil temperature step.
Fig. 4 is the functional unit schematic diagram of air conditioner oil returning control device provided in an embodiment of the present invention.
Appended drawing reference:
1- air conditioner；2- controller；3- memory；4- compressor；5- solenoid valve；6- temperature detecting module；7- air conditioner
Oil return control device；8- oil drain quantity computing unit；9- judging unit；10- starts oil return unit；11- temperature acquiring unit；12-
Temperature calculation unit；13- stops oil return unit.
Specific embodiment
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or
Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any
This actual relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant be intended to it is non-exclusive
Property include so that include a series of elements process, method, article or equipment not only include those elements, but also
Further include other elements that are not explicitly listed, or further include for this process, method, article or equipment it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described
There is also other identical elements in the process, method, article or equipment of element.
First embodiment
The embodiment of the invention provides a kind of air conditioners 1, while for adjusting room temperature, reduce capacity consumption, improve
Effect.Referring to Fig. 1, being the functional block diagram of air conditioner 1 provided in an embodiment of the present invention.The air conditioner 1 includes: memory 3, control
Device 2, compressor 4, solenoid valve 5, oil return capillary, oil eliminator, temperature detecting module 6 and air conditioner oil returning control device processed
7.Wherein, controller 2 is electrically connected with memory 3, temperature detecting module 6, compressor 4 and solenoid valve 5, and oil return capillary is logical
It crosses solenoid valve 5 to be communicated with the oil separator, the air conditioner oil returning control device 7 includes at least one can be with software or firmware
(firmware) form is stored in the memory 3.
Wherein, memory 3 can be used for storing software program and unit, such as the air conditioner oil returning control in the embodiment of the present invention
Program instruction/unit corresponding to device 7 processed and method, the air conditioner oil returning that controller 2 is stored in memory 3 by operation
Control device 7, the software program of method and unit, thereby executing various function application and data processing, such as present invention is real
The air conditioner oil returning control method of example offer is provided.Wherein, the memory 3 may be, but not limited to, random access memory
(Random Access Memory, RAM), read-only memory (Read Only Memory, ROM), programmable read only memory
(Programmable Read-Only Memory, PROM), erasable read-only memory (Erasable Programmable
Read-Only Memory, EPROM), electricallyerasable ROM (EEROM) (Electric Erasable Programmable
Read-Only Memory, EEPROM) etc..
Controller 2 may be a kind of IC chip, the processing capacity with signal.Above-mentioned controller 2 can be
General processor, including central processing unit (Central Processing Unit, abbreviation CPU), network processing unit (Network
Processor, abbreviation NP) etc.；It can also be digital signal processor (DSP), specific integrated circuit (ASIC), field-programmable
Gate array (FPGA) either other programmable logic device, discrete gate or transistor logic, discrete hardware components.It can be with
Realize or execute disclosed each method, step and the logic diagram in the embodiment of the present invention.General processor can be micro- place
Device is managed, which can also be any conventional processor etc..
Temperature detecting module 6 is used to detect the temperature of all parts of air conditioner 1, temperature, sky including oil return capillary
The delivery temperature etc. of outer machine is adjusted, and the temperature for the oil return capillary that will test is transmitted to controller 2.
In a kind of preferred embodiment, which includes multiple temperature sensors.
It is to be appreciated that structure shown in FIG. 1 is only to illustrate, air conditioner 1 may also include than shown in Fig. 1 more or more
Few component, or with the configuration different from shown in Fig. 1.Each component shown in Fig. 1 can use hardware, software or its group
It closes and realizes.
Second embodiment
A kind of air conditioner oil returning control method is present embodiments provided, for controlling the oil return of oil eliminator, prevents from freezing
Agent returns to compressor 4 by oil return capillary, and waist performance, power consumption is caused to increase.Referring to Fig. 2, Fig. 2 shows the present embodiment
The schematic diagram of the air conditioner oil returning control method of offer, air conditioner oil returning control method is the following steps are included: S10~S60.
Step S10: the external oil drain quantity of compressor 4 is calculated.
Compressor 4 needs compressor oil in the process of running to lubricate its all parts, in system operation, compresses
Compressor 4 can be discharged together with refrigerant (refrigerant) in machine oil, for example, being expelled to oil eliminator.According to the oil extraction of compressor 4
The continuous working period of rate, the running frequency of compressor 4 and compressor 4 calculates the external oil drain quantity of compressor 4.
Specifically, for compressor 4 in different frequency operations, the power of external oil extraction is also different, therefore according to compression
Machine 4 carries out the calculating of oil drain quantity in the run the period of different frequency.
For example, according to formula L1=a*A* (f1*t1+f2*t2+…fn*tn) calculate compressor 4 external oil drain quantity.Wherein,
L1For the external oil drain quantity of compressor 4, a is the overall efficiency coefficient of compressor 4, and A is the oil extraction rate of compressor 4, f1~fnFinger pressure
The running frequency of contracting machine 4, t1~tnRefer to the runing time of compressor 4, wherein n is the integer more than or equal to 1.tnRefer to compression
Machine 4 is with frequency fnThe time of continuous service.According to the time run under the different running frequencies and different frequency of compressor 4,
The external oil drain quantity L of compressor 4 is calculated according to the oil extraction rate of compressor 4 and overall efficiency coefficient1.In this present embodiment,
The compressor oil that compressor 4 is discharged enters oil eliminator, calculates the external oil drain quantity L of compressor 41It is to calculate in oil eliminator
Oil drain quantity L1。
Step S20: judge whether the oil drain quantity in oil eliminator reaches preset oil extraction threshold value.
In this present embodiment, presetting oil extraction threshold value a L, the oil extraction threshold value L is set according to the reliability of compressor 4
Oil extraction threshold value.As the oil drain quantity L in oil eliminator1When not up to oil extraction threshold value L, the compressor oil in compressor 4 is enough to ensure that
The reliability of the normal work of compressor 4,1 compressor 4 of air conditioner is protected, and without additional operation is carried out, remains current
State, keep air conditioner 1 continue to work normally.As the oil drain quantity L in oil eliminator1When reaching oil extraction threshold value L, air conditioner 1
The reliability of compressor 4 cannot ensure, need to carry out oil return at this time, execute step S30.
Step S30: opens solenoid valve 5 carries out oil return.
As the oil drain quantity L in oil eliminator1When reaching oil extraction threshold value L, control solenoid valve 5, which is opened, carries out oil return.Solenoid valve 5
It is arranged between oil return capillary and oil eliminator, as the oil drain quantity L in oil eliminator1When reaching oil extraction threshold value L, electromagnetism is opened
Valve 5 is communicated with the oil separator oil return capillary, and the oil in oil eliminator is recycled into compressor via oil return capillary again
4, ensure the normal table operation of compressor 4.
Step S40: temperature after the oil return of oil return capillary is obtained.
Since compressor oil can flow together with refrigerant, during 5 oil return capillary of opens solenoid valve carries out oil return,
Refrigerant reenters compressor 4 by oil return capillary in order to prevent, and the temperature to oil return capillary is needed to be monitored.Yu Ben
In embodiment, oil return capillary is provided with temperature sensor, temperature T after the oil return for detecting acquisition oil return capillaryoil, and
By temperature T after oil returnoilIt is sent to controller 2, controller 2 is according to temperature T after oil returnoilTo the oil return process of oil return capillary into
Row monitoring.Temperature after the oil return refers to that oil return capillary opens the real time temperature after carrying out oil return in solenoid valve, in this implementation
In example, the temperature after preset time interval obtains the oil return, the preset time interval is according to the appearance of oil eliminator
Amount is set, to guarantee timeliness and accuracy to the condition monitoring of oil return capillary.
Step S50: judge temperature T after oil returnoilWith preset theoretical returning-oil temperature Toil' whether meet default item
Part.
During oil eliminator oil return, the compressor oil that compressor 4 is discharged deposits collection in the bottom of oil eliminator, and in oil
Refrigerant (refrigerant) content it is less, compressor oil by oil return capillary back in compressor 4, with oily in oil eliminator
The reduction of amount returns to amount of refrigerant in the oil of compressor 4 by oil return capillary and also gradually increases, since refrigerant passes through back
Decompression throttle effect can be generated when oily capillary, temperature can reduce, and when the compressor oil that compressor 4 is discharged passes through, it will not
Generate this effect.Therefore, temperature T after the oil return by detecting oil return capillaryoil, judge temperature T after oil returnoilWith set in advance
Fixed theoretical returning-oil temperature Toil' whether meet preset condition.When reaching setting condition, then the trapped fuel in oil eliminator is determined
Oil return finishes, and executes step S60, stops oil return；If not meeting preset condition, determine that the trapped fuel in oil eliminator returns not yet
Oil finishes, and keeps the open state of solenoid valve 5 at this time, continues oil return.
Due to that can generate decompression throttle effect when refrigerant passes through oil return capillary, the temperature of oil return capillary can drop
It is low, and compressor 4 be discharged compressor oil pass through oil return capillary when, this effect will not be generated, the present embodiment passes through comparison
The actual temperature of oil return capillary judges whether oil return is completed.Before step S50 is judged, air conditioner oil returning control
Method further includes calculating theoretical returning-oil temperature Toil' the step of, referring to Fig. 3, it includes step S41~step S42.
Step S41: the operation high pressure and delivery temperature of outdoor machine of air-conditioner are obtained.
Generally, the operating status of air conditioner 1 includes the states such as high pressure, low pressure and static pressure.Its mesolow is in 0.4--
Between 0.6MPa, high pressure between 1.6--2.1MPa, shut down when static pressure in 1MPa or so, the performance according to compressor 4 is each
It is different, in this present embodiment, obtains air conditioner 1 and run high pressure.The delivery temperature refers to the discharge of 1 compressor 4 of air conditioner
The temperature of refrigerant is generally provided with temperature sensor in the exhaust outlet of the exhaust pipe of 1 compressor 4 of air conditioner, for detecting
Obtain the delivery temperature of outdoor machine of air-conditioner.
Step S42: theoretical return is calculated according to the length of oil return capillary, the operation high pressure of outdoor machine of air-conditioner and delivery temperature
Oil temperature Toil'。
According to the length of oil return capillary, the operation high pressure of outdoor machine of air-conditioner and delivery temperature according to formula: Toil'=C1*
X+C2*Y+C3*Z+C4Calculate theoretical returning-oil temperature Toil', wherein X is the delivery temperature of the outdoor machine of air-conditioner, and Y is the air-conditioning
The operation high pressure of outer machine, Z are the length of oil return capillary, and the length of oil return capillary is the characteristic of oil return capillary itself, right
There is different length, C for each oil return capillary1、C2、C3And C4To be set in advance according to the heat-transfer character of refrigerant
Fixed constant coefficient.
In this present embodiment, the preset condition isWherein,For according to point of oil eliminator
Parameter from efficiency setting,It can specifically be set according to the characteristic of oil return capillary and refrigerant.
The temperature T after oil return of oil return capillaryoilWith theoretical returning-oil temperature Toil' when meeting above-mentioned condition, then represent back
Oil is completed, and is had refrigerant by oil return capillary, is led to the reduction of oil return capillary temperature, the trapped fuel oil return in oil eliminator is complete at this time
Finish, execute step S60, stops oil return.
Step S60: it closes solenoid valve 5 and stops oil return.
The temperature T after oil return of oil return capillaryoilWith theoretical returning-oil temperature Toil' meetWhen, then it represents
Oil return is completed, and the trapped fuel oil return in oil eliminator finishes, and controller 2 controls solenoid valve 5 and closes, and is stopped oil return, is prevented refrigerant from returning
It returns in compressor 4, causes 1 waist performance of air conditioner, power consumption to increase, operational energy efficiency reduces.
3rd embodiment
Referring to Fig. 4, Fig. 4 is a kind of air conditioner oil returning control device 7 that present pre-ferred embodiments provide.It needs to illustrate
, air conditioner oil returning control device 7 provided by the present embodiment, the technical effect and above-mentioned second of basic principle and generation
The air conditioner oil returning control method that embodiment provides is essentially identical, and to briefly describe, the present embodiment part does not refer to place, can join
Examine corresponding contents in the above embodiments.
Air conditioner oil returning control device 7 includes oil drain quantity computing unit 8, judging unit 9, starting oil return unit 10, temperature
Acquiring unit 11, temperature calculation unit 12 and stopping oil return unit 13.
Wherein, oil drain quantity computing unit 8, for oil extraction rate, the running frequency and pressure of compressor 4 according to compressor 4
Contracting machine 4 is in the continuous working period of different running frequencies, according to formula L1=a*A* (f1*t1+f2*t2+…fn*tn) calculate
To the external oil drain quantity L of compressor 41, wherein L1For the external oil drain quantity of compressor 4, a is overall efficiency coefficient, and A is compressor
4 oil extraction rate, fnRefer to the running frequency of compressor 4, tnRefer to compressor 4 with frequency fnThe time of operation.
It is to be appreciated that in an advantageous embodiment, oil drain quantity computing unit 8 can be used for executing step S10.
Judging unit 9, for judging whether the oil drain quantity in oil eliminator reaches preset oil extraction threshold value.
It is to be appreciated that in an advantageous embodiment, judging unit 9 can be used for executing step S20.
Start oil return unit 10, for opening electromagnetism when the oil drain quantity in oil eliminator reaches preset oil extraction threshold value
Valve 5 carries out oil return.
It is to be appreciated that in an advantageous embodiment, starting oil return unit 10 can be used for executing step S30.
Temperature acquiring unit 11, temperature after the oil return for obtaining the oil return capillary.
It is to be appreciated that in an advantageous embodiment, temperature acquiring unit 11 can be used for executing step S40.
Temperature calculation unit 12, for according to the length of oil return capillary, the operation high pressure of outdoor machine of air-conditioner and exhaust temperature
Degree is according to formula: Toil'=C1*X+C2*Y+C3*Z+C4Calculate theoretical returning-oil temperature Toil', wherein X is the outdoor machine of air-conditioner
Delivery temperature, Y are the operation high pressure of the outdoor machine of air-conditioner, and Z is the length of oil return capillary, C1、C2、C3And C4For according to refrigeration
The preset constant coefficient of the heat-transfer character of agent.
It is to be appreciated that in an advantageous embodiment, temperature calculation unit 12 can be used for executing step S41~S42.
The judging unit 9 is also used to judge temperature T after oil returnoilWith preset theoretical returning-oil temperature Toil' whether
Meet preset condition.
It is to be appreciated that in an advantageous embodiment, the judging unit 9 is also used to execute step S50.
Stop oil return unit 13, for the temperature T after oil return of oil return capillaryoilWith preset theoretical oil return temperature
Spend Toil' when meeting preset condition, control solenoid valve 5 is closed, and oil return is stopped.In this present embodiment, when the oil return of oil return capillary
Temperature T afterwardsoilWith theoretical returning-oil temperature Toil' meetWhen, then oil return completion is represented, the trapped fuel in oil eliminator returns
Oil finishes, and controller 2 controls solenoid valve 5 and closes, and stops oil return, prevents refrigerant from returning in compressor 4, leads to 1 performance of air conditioner
Waste, power consumption increase, and operational energy efficiency reduces.
In conclusion the air conditioner returns the present invention provides a kind of air conditioner oil returning control method, device and air conditioner
Oily control method includes the opens solenoid valve progress oil return when the oil drain quantity in oil eliminator reaches preset value；Obtain the oil return
Temperature after the oil return of capillary；Closing when temperature and preset theoretical returning-oil temperature meet preset condition after the oil return
Solenoid valve stops oil return.By carrying out detection conversion to the oil mass in oil eliminator, when the oil mass in oil eliminator reaches threshold value
When opens solenoid valve oil return carried out by oil return capillary, temperature after the oil return by monitoring oil return capillary and will be after oil return
Temperature is compared with theoretical returning-oil temperature, can effectively judge refrigerant by oil return capillary, thus logical in refrigerant
Solenoid valve is closed when crossing oil return capillary, more refrigerants is avoided passing through compressor is bypassed back by oil return capillary and do in vain
Function reduces energy consumption to improve operation effect of air conditioner unit.
In several embodiments provided herein, it should be understood that disclosed device and method can also pass through
Other modes are realized.The apparatus embodiments described above are merely exemplary, for example, flow chart and block diagram in attached drawing
Show the device of multiple embodiments according to the present invention, the architectural framework in the cards of method and computer program product,
Function and operation.In this regard, each box in flowchart or block diagram can represent the one of a module, section or code
Part, a part of the module, section or code, which includes that one or more is for implementing the specified logical function, to be held
Row instruction.It should also be noted that function marked in the box can also be to be different from some implementations as replacement
The sequence marked in attached drawing occurs.For example, two continuous boxes can actually be basically executed in parallel, they are sometimes
It can execute in the opposite order, this depends on the function involved.It is also noted that every in block diagram and or flow chart
The combination of box in a box and block diagram and or flow chart can use the dedicated base for executing defined function or movement
It realizes, or can realize using a combination of dedicated hardware and computer instructions in the system of hardware.
In addition, each functional module in each embodiment of the present invention can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
It, can be with if the function is realized and when sold or used as an independent product in the form of software function module
It is stored in a computer readable storage medium.Based on this understanding, technical solution of the present invention is substantially in other words
The part of the part that contributes to existing technology or the technical solution can be embodied in the form of software products, the meter
Calculation machine software product is stored in a storage medium, including some instructions are used so that a computer equipment (can be a
People's computer, server or network equipment etc.) it performs all or part of the steps of the method described in the various embodiments of the present invention.
And storage medium above-mentioned includes: that USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), arbitrary access are deposited
The various media that can store program code such as reservoir (RAM, Random Access Memory), magnetic or disk.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of air conditioner oil returning control method, which is characterized in that the air conditioner oil returning control method is applied to air conditioner
(1), the air conditioner (1) includes that compressor (4), oil eliminator, solenoid valve (5) and oil return capillary, oil return capillary pass through
Solenoid valve (5) is communicated with the oil separator, and the air conditioner oil returning control method includes:
When the oil drain quantity in oil eliminator reaches preset value, opens solenoid valve (5) carries out oil return；
Temperature after the oil return of the oil return capillary is obtained, temperature refers to the oil return capillary after opening oil return after the oil return
Actual temperature；
Solenoid valve (5) are closed when temperature and preset theoretical returning-oil temperature meet preset condition after the oil return to stop back
Oil.
2. air conditioner oil returning control method according to claim 1, which is characterized in that in step as the row in oil eliminator
When oil mass reaches preset value before opens solenoid valve (5) progress oil return, which comprises
According to the continuous working period of the oil extraction rate of compressor (4), the running frequency of compressor (4) and compressor (4), according to
Formula L1=a*A* (f1*t1+f2*t2+…fn*tn) the external oil drain quantity L of compressor (4) is calculated1, wherein L1For compressor
(4) external oil drain quantity, a are overall efficiency coefficient, and A is the oil extraction rate of compressor (4), fnRefer to the running frequency of compressor (4),
tnRefer to compressor (4) with frequency fnThe time of operation.
3. air conditioner oil returning control method according to claim 1, which is characterized in that the method also includes:
Obtain the operation high pressure and delivery temperature of outdoor machine of air-conditioner；
According to the length of oil return capillary, the operation high pressure of outdoor machine of air-conditioner and delivery temperature according to formula: Toil'=C1*X+C2*
Y+C3*Z+C4Calculate theoretical returning-oil temperature Toil', wherein X is the delivery temperature of the outdoor machine of air-conditioner, and Y is the outdoor machine of air-conditioner
High pressure is run, Z is the length of oil return capillary, C1、C2、C3And C4For the preset constant of heat-transfer character according to refrigerant
Coefficient.
4. air conditioner oil returning control method according to claim 2, which is characterized in that the oil extraction when in oil eliminator
Opens solenoid valve (5) progress oil return specifically includes when amount reaches preset value: as the external oil drain quantity L that compressor (4) is calculated1
When greater than L, opens solenoid valve (5) carries out oil return, and wherein L is the oil extraction threshold value set according to the reliability of compressor (4).
5. air conditioner oil returning control method according to claim 3, which is characterized in that the temperature after oil return with
Preset theory returning-oil temperature closes the step of solenoid valve (5) stop oil return when meeting preset condition
The temperature T after oil returnoilMeet T with the theoretical returning-oil temperature being calculatedoil':
When, it closes solenoid valve (5), stops oil return to prevent refrigerant from flowing out by oil return capillary, wherein
For the parameter set according to the separative efficiency of oil eliminator,
6. a kind of air conditioner oil returning control device, which is characterized in that the air conditioner oil returning control device (7) includes:
Temperature acquiring unit (11), temperature after the oil return for obtaining air conditioner oil returning capillary；
Start oil return unit (10), for when the oil drain quantity in oil eliminator reaches preset value opens solenoid valve (5) returned
Oil；
Stop oil return unit (13), meets preset condition for the temperature after oil return and preset theoretical returning-oil temperature
When close solenoid valve (5) stop oil return.
7. air conditioner oil returning control device according to claim 6, which is characterized in that the air conditioner oil returning control device
It (7) include: oil drain quantity computing unit (8), for oil extraction rate, the running frequency and pressure of compressor (4) according to compressor (4)
The continuous working period of contracting machine (4), according to formula L1=a*A* (f1*t1+f2*t2+…fn*tn) compressor (4) is calculated
External oil drain quantity L1, wherein L1For the external oil drain quantity of compressor (4), a is overall efficiency coefficient, and A is the oil extraction of compressor (4)
Rate, fnRefer to the running frequency of compressor (4), tnRefer to compressor (4) with frequency fnThe time of operation.
8. air conditioner oil returning control device according to claim 6, which is characterized in that the air conditioner oil returning control device
It (7) include temperature calculation unit (12), the temperature calculation unit (12) is for the length according to oil return capillary, outdoor machine of air-conditioner
Operation high pressure and delivery temperature according to formula: Toil'=C1*X+C2*Y+C3*Z+C4Calculate theoretical returning-oil temperature Toil',
In, X is the delivery temperature of the outdoor machine of air-conditioner, and Y is the operation high pressure of the outdoor machine of air-conditioner, and Z is the length of oil return capillary,
C1、C2、C3And C4For the preset constant coefficient of heat-transfer character according to refrigerant.
9. air conditioner oil returning control device according to claim 6, which is characterized in that the starting oil return unit (10) is used
In as the external oil drain quantity L that compressor (4) is calculated1When greater than L, opens solenoid valve (5) carries out oil return, and wherein L is basis
The oil extraction threshold value of the reliability setting of compressor (4)；The stopping oil return unit (13) is used for the temperature T after oil returnoilWith
The theoretical returning-oil temperature being calculated meets Toil':When, it closes solenoid valve (5), stops oil return, whereinFor
According to the separative efficiency of oil eliminator set parameter,
10. a kind of air conditioner, which is characterized in that the air conditioner (1) includes: that memory (3), controller (2) and air conditioner return
Oily control device (7), the air conditioner oil returning control device (7) be installed on the memory (3) and including one or more by
The software function module that the controller (2) executes, the air conditioner oil returning control device (7) include:
Temperature acquiring unit (11), temperature after the oil return for obtaining the air conditioner oil returning capillary；
Start oil return unit (10), for when the oil drain quantity in oil eliminator reaches preset value opens solenoid valve (5) returned
Oil；
Stop oil return unit (13), meets preset condition for the temperature after oil return and preset theoretical returning-oil temperature
When close solenoid valve (5) stop oil return.
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| CN111426040A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
| CN111426039A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
| CN112361538A (en) * | 2020-11-25 | 2021-02-12 | 珠海格力电器股份有限公司 | Oil return control method and device and multi-split system |
| CN113587353A (en) * | 2021-08-16 | 2021-11-02 | 广东积微科技有限公司 | Control method for oil return of multi-split air conditioning system |
| CN114484715A (en) * | 2022-01-10 | 2022-05-13 | 青岛海尔空调电子有限公司 | Multi-compressor refrigerant circulating system and control method thereof |
| CN114923273A (en) * | 2022-05-06 | 2022-08-19 | 青岛海信日立空调系统有限公司 | Air conditioning system and control method thereof |
| CN117387253A (en) * | 2023-12-08 | 2024-01-12 | 珠海格力电器股份有限公司 | Unit oil return control method and device and water chilling unit |
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| CN113587353A (en) * | 2021-08-16 | 2021-11-02 | 广东积微科技有限公司 | Control method for oil return of multi-split air conditioning system |
| CN113587353B (en) * | 2021-08-16 | 2022-07-08 | 广东积微科技有限公司 | Control method for oil return of multi-split air conditioning system |
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| CN114484715B (en) * | 2022-01-10 | 2024-02-20 | 青岛海尔空调电子有限公司 | Multi-compressor refrigerant circulation system and control method thereof |
| CN114923273A (en) * | 2022-05-06 | 2022-08-19 | 青岛海信日立空调系统有限公司 | Air conditioning system and control method thereof |
| CN114923273B (en) * | 2022-05-06 | 2023-11-07 | 青岛海信日立空调系统有限公司 | Air conditioning system and control method thereof |
| CN117387253A (en) * | 2023-12-08 | 2024-01-12 | 珠海格力电器股份有限公司 | Unit oil return control method and device and water chilling unit |
| CN117387253B (en) * | 2023-12-08 | 2024-03-08 | 珠海格力电器股份有限公司 | Unit oil return control method and device and water chilling unit |
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