CN110341429A - The method for controlling oil return of Air conditioner on car - Google Patents
The method for controlling oil return of Air conditioner on car Download PDFInfo
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- CN110341429A CN110341429A CN201910695608.3A CN201910695608A CN110341429A CN 110341429 A CN110341429 A CN 110341429A CN 201910695608 A CN201910695608 A CN 201910695608A CN 110341429 A CN110341429 A CN 110341429A
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- air conditioner
- oil return
- car
- revolving speed
- compressor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00378—Air-conditioning arrangements specially adapted for particular vehicles for tractor or load vehicle cabins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00421—Driving arrangements for parts of a vehicle air-conditioning
- B60H1/00428—Driving arrangements for parts of a vehicle air-conditioning electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00735—Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g. signal treatment, dynamic models
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
- B60H1/3205—Control means therefor
- B60H1/3214—Control means therefor for improving the lubrication of a refrigerant compressor in a vehicle
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to Air conditioner on car technical fields, and in particular to a kind of method for controlling oil return of Air conditioner on car.Present invention seek to address that the problem of not can guarantee the normal oil return of compressor existing for existing Air conditioner on car.For this purpose, Air conditioner on car of the invention includes that compressor, interior radiator, inner blower, throttle valve, outdoor radiator and outer blower, Air conditioner on car are installed on vehicle, vehicle configuration has battery, and battery is connect with Air conditioner on car, to power to Air conditioner on car；Method for controlling oil return includes: detection compressor in the first detection cycle T1Interior running frequency f；Compare running frequency and the first predeterminated frequency f1Size；Based on comparative result, selectively oil return mode is forced in control Air conditioner on car operation first.By above-mentioned control mode, the method for controlling oil return of the Air conditioner on car of the application can realize effective oil return when Air conditioner on car is run, and make compressor sufficient lubrication, guarantee the usage experience of user.
Description
Technical field
The present invention relates to Air conditioner on car technical fields, and in particular to a kind of method for controlling oil return of Air conditioner on car.
Background technique
With the development of traffic transport industry, the driving environment of bulk transport truck has also obtained significantly improving,
Air conditioner on car is fitted in general haulage truck.Compared to orthodox car air-conditioning, Air conditioner on car by vehicle motor without opening
It is dynamic, but directly driven by Vehicular accumulator cell, therefore it can run in automobile flameout state, it is a kind of to be more energy-saving and environmentally friendly
Air-conditioning.
But the traveling road conditions of haulage truck are generally all relatively more severe, travel across in upward slope or rugged road
Cheng Zhong, automobile are easy to appear inclination or jolt, and compressor can also tilt therewith, if parking sky is used in driver at this time
It adjusts, then compressor at work just inhale less than refrigerator oil by crankshaft, generates unlubricated friction so as to cause between the components of compressor
It wipes, easily causes compressor stuck or appearance the case where motor is burnt.Thus it is guaranteed that the timely of refrigerator oil is returned in compressor
It returns most important for protecting compressor.
Correspondingly, this field needs a kind of method for controlling oil return of new Air conditioner on car to solve the above problems.
Summary of the invention
In order to solve the above problem in the prior art, in order to solve not can guarantee compression existing for existing Air conditioner on car
The problem of machine normal oil return, the present invention provides a kind of method for controlling oil return of Air conditioner on car, the Air conditioner on car includes compression
Machine, interior radiator, inner blower, throttle valve, outdoor radiator and outer blower, the Air conditioner on car are installed on vehicle, the vehicle
It is configured with battery, the battery connect with the Air conditioner on car, to give Air conditioner on car power supply；The oil return control
Method processed includes:
The compressor is detected in the first detection cycle T1Interior running frequency f；
Compare the running frequency and the first predeterminated frequency f1Size；
Based on comparative result, it selectively controls the Air conditioner on car operation first and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " based on comparative result, selectively control
Make the first pressure of Air conditioner on car operation oil return mode " the step of further comprise:
When the running frequency f is in the first detection cycle T1Inside meet f < f always1When, control the Air conditioner on car
It runs described first and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " Air conditioner on car operation institute is controlled
State the first pressure oil return mode " the step of further comprise:
The running frequency of the compressor is controlled from the running frequency f raising frequency to f2, the inner blower revolving speed from working as
Preceding revolving speed rinRise to (f2/f1)×rin, the outer blower revolving speed from current rotating speed raoDrop to (f1/f2)×rao, it is described
The aperture of throttle valve is opened from current aperture B to (f2/f1)×B；
After continuing the first setting time, the running frequency for controlling the compressor is downconverted to frequency f, the inner blower
Revolving speed drops to revolving speed rin, the outer blower revolving speed rise to revolving speed rao, the throttle valve aperture close to aperture B.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, the method for controlling oil return further include:
When the running frequency f is in the first detection cycle T1Inside it is unsatisfactory for f < f1When, the compressor is detected
Two detection cycle T2Running frequency f '；
Compare the running frequency f ' and the second predeterminated frequency f2Size；
Based on comparative result, it selectively controls the Air conditioner on car operation second and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " based on comparative result, selectively control
Make the second pressure of Air conditioner on car operation oil return mode " the step of further comprise:
When the running frequency f ' is in the second detection cycle T2Inside meet f ' >=f always2When, further described in acquisition
The inner coil pipe temperature T of interior radiatorp；
Compare the inner coil pipe temperature TpWith preset temperature TeSize；
Based on comparative result, it selectively controls the Air conditioner on car operation described second and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " based on comparative result, selectively control
Make Air conditioner on car operation the second pressure oil return mode " the step of further comprise:
Work as Tp< TeWhen, it controls the Air conditioner on car operation described second and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " Air conditioner on car operation institute is controlled
State the second pressure oil return mode " the step of further comprise:
The revolving speed of the inner blower is controlled by current rotating speed rinRise to (Te/Tp)×rin, the outer blower revolving speed by
Current rotating speed raoDrop to (Tp/Te)×rao, the throttle valve aperture opened by current aperture B to (Te/Tp)×B；
After continuing the second setting time, the revolving speed for controlling the inner blower drops to revolving speed rin, the outer blower turns
Speed rises to revolving speed rao, the throttle valve aperture close to aperture B.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " based on comparative result, selectively control
Make the Air conditioner on car operation second and force oil return mode " the step of further include:
When the running frequency f ' is in the second detection cycle T2Inside meet f ' < f always2When, control the compressor
Running frequency from the running frequency f ' raising frequency to f2；
The running frequency raising frequency of the compressor is controlled to f2While, before or after, obtain the interior radiator
Inner coil pipe temperature Tp；
Compare the inner coil pipe temperature TpWith preset temperature TeSize；
Based on comparative result, it selectively controls the Air conditioner on car operation described second and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " based on comparative result, selectively control
Make Air conditioner on car operation the second pressure oil return mode " the step of further comprise:
Work as Tp< TeWhen, it controls the Air conditioner on car operation described second and forces oil return mode.
In the optimal technical scheme of the method for controlling oil return of above-mentioned Air conditioner on car, " Air conditioner on car operation institute is controlled
State the second pressure oil return mode " the step of further comprise:
The revolving speed of the inner blower is controlled by current rotating speed rinRise to (Te/Tp)×rin, the outer blower revolving speed by
Current rotating speed raoDrop to (Tp/Te)×rao, the throttle valve aperture opened by current aperture B to (Te/Tp)×B；
After continuing the second setting time, the running frequency for controlling the compressor is downconverted to frequency f ', the inner blower
Revolving speed drop to revolving speed rin, the outer blower revolving speed rise to revolving speed rao, the throttle valve aperture close to aperture B.
It will be appreciated to those of skill in the art that Air conditioner on car includes compression in the preferred technical solution of the present invention
Machine, interior radiator, inner blower, throttle valve, outdoor radiator and outer blower, Air conditioner on car are installed on vehicle, and vehicle configuration has
Battery, battery are connect with Air conditioner on car, to power to Air conditioner on car；Method for controlling oil return includes: that detection compressor exists
First detection cycle T1Interior running frequency f；Compare running frequency and the first predeterminated frequency f1Size；Based on comparative result, it selects
It controls to selecting property Air conditioner on car operation first and forces oil return mode.
By above-mentioned control mode, the method for controlling oil return of the Air conditioner on car of the application can be real when Air conditioner on car is run
Existing effect oil return, makes compressor sufficient lubrication, guarantees the usage experience of user.Specifically, in the first detection cycle T1Inside such as
The running frequency f of fruit compressor is always less than the first predeterminated frequency f1, then prove that compressor is currently operating in lower work frequency
Rate, the system pressure of Air conditioner on car is integrally lower when working frequency is lower, and refrigerant flowing velocity is slower, is unfavorable for oil return, at this time
Oil return mode is forced by control Air conditioner on car operation first, the oil return speed of compressor is can be improved, guarantees that vehicle driving exists
It can normal oil return when any road.And by persistently judging running frequency f in the first detection cycle1Whether less than first
Predeterminated frequency f1, the application can also improve Air conditioner on car operation stability, avoid due to erroneous judgement or vehicle instantaneous ramp top
Oil return mode is forced in Air conditioner on car operation first caused by winnowing with a dustpan, and guarantees the usage experience of user.
Detailed description of the invention
The method for controlling oil return of Air conditioner on car of the invention is described with reference to the accompanying drawings and in conjunction with haulage truck.Attached drawing
In:
Fig. 1 is the flow chart of the method for controlling oil return of Air conditioner on car of the invention；
Fig. 2 is the frequency variation curve figure of compressor in the method for controlling oil return of Air conditioner on car of the invention；
Fig. 3 is the control logic figure of the method for controlling oil return of Air conditioner on car of the invention.
Specific embodiment
The preferred embodiment of the present invention described with reference to the accompanying drawings.It will be apparent to a skilled person that this
A little embodiments are used only for explaining technical principle of the invention, it is not intended that limit the scope of the invention.Although for example,
Present embodiment combination haulage truck is introduced, but this is not intended as the application scenarios of limitation the application, ability
The control method of the application can be applied to other vehicles, only under conditions of without departing from the principle of the invention by field technique personnel
Will the vehicle have Air conditioner on car.For example, the control method of the application can also be applied to caravan or bus etc..
With reference first to Fig. 1, the method for controlling oil return of Air conditioner on car of the invention is described.Wherein, Fig. 1 is the present invention
Air conditioner on car method for controlling oil return flow chart.
As shown in Figure 1, to solve the problems, such as not can guarantee the normal oil return of compressor, the application existing for existing Air conditioner on car
Provide a kind of method for controlling oil return of Air conditioner on car, Air conditioner on car include compressor, interior radiator, inner blower, throttle valve,
Outdoor radiator and outer blower, Air conditioner on car are installed on haulage truck, are configured with battery, battery and parking on haulage truck
Air-conditioning connection, to power to Air conditioner on car；Method for controlling oil return includes:
S100, detection compressor are in the first detection cycle T1Interior running frequency f, for example, the first detection cycle T1=30s,
In Air conditioner on car operation, the running frequency f of compressor is continuously detected in 30s；
S200, compare running frequency and the first predeterminated frequency f1Size；For example, the first predeterminated frequency f1=40Hz is being examined
After the running frequency f for measuring compressor, in the first detection cycle T1Continue the size for comparing frequency f and 40Hz in=30s.
S300, based on comparative result selectively controls Air conditioner on car operation first and forces oil return mode；For example,
If the working frequency f of compressor is consistently less than 40Hz in the 30s of a detection cycle, the compressor operating frequency beginning at this time is proved
It is in lower frequency separation eventually, the system pressure of Air conditioner on car is relatively low at this time, and refrigerant flowing velocity is slower, is unfavorable for compressing
Machine oil return, once vehicle occurs jolting or tilt, it is easy to and cause compressor oil return difficult.The control parking of controller control at this time
Operation of air conditioner first forces oil return mode to guarantee the lubrication of compressor to accelerate the oil return speed of compressor.For another example, first
If the working frequency f of compressor is not consistently less than 40Hz in the 30s of detection cycle, compressor operating frequency at this time is proved
There is height to have low, when working frequency is high, air-conditioning system pressure is higher, and refrigerant flowing velocity is very fast, is conducive to oil return, in work frequency
When rate is low, air-conditioning system pressure is lower, and refrigerant flowing express delivery is slower, is unfavorable for oil return, but in general, in this case,
Compressor is not in low-frequency operation state always, therefore can guarantee normal oil return substantially, at this time without controlling Air conditioner on car
Oil return mode is forced into first, to guarantee the operation stability of Air conditioner on car.Certainly, the first detection cycle T1It is default with first
Frequency f1Only make exemplary description in this application, it can be adjusted based on practical application scene in those skilled in the art,
The application is not construed as limiting this.
It should be noted that in the present embodiment, controller can be the existing controller of vehicle, parking sky can be
Existing controller is adjusted, is also possible to the controller for being used to execute method of the invention being specially arranged, can also be universal vehicle
A functional module or functional unit for controller.For example, when vehicle is electric vehicle, the control module of the application can be with
It is entire car controller (VCU), when vehicle is on-electric vehicle, control module can be electronic control unit (ECU) etc. again.
By above-mentioned control mode, the method for controlling oil return of the Air conditioner on car of the application can be real when Air conditioner on car is run
Existing effect oil return, makes compressor sufficient lubrication, guarantees the usage experience of user.Specifically, in the first detection cycle T1Inside such as
The running frequency f of fruit compressor is always less than the first predeterminated frequency f1, then prove that compressor is currently operating in lower work frequency
Rate, the system pressure of Air conditioner on car is integrally lower when working frequency is lower, and refrigerant flowing velocity is slower, is unfavorable for oil return, at this time
Oil return mode is forced by control Air conditioner on car operation first, the oil return speed of compressor is can be improved, guarantees haulage truck row
Sailing can normal oil return in any road.And by persistently judging running frequency f in the first detection cycle1Whether it is less than
First predeterminated frequency f1, the application can also improve Air conditioner on car operation stability, avoid due to erroneous judgement or truck instantaneously incline
Oil return mode is forced in Air conditioner on car operation first caused by tiltedly jolting, and guarantees the usage experience of user.
Further below referring to Fig. 2 and Fig. 3, the method for controlling oil return of the Air conditioner on car of the application is described in detail.
Wherein, Fig. 2 is the frequency variation curve figure of compressor in the method for controlling oil return of Air conditioner on car of the invention；Fig. 3 is the present invention
Air conditioner on car method for controlling oil return control logic figure.
As shown in Figures 2 and 3, in a kind of possible embodiment, step S300 further comprises: as running frequency f
In the first detection cycle T1Inside meet f < f always1When, oil return mode is forced in control Air conditioner on car operation first.Specifically, it is assumed that
The initial operating state of current Air conditioner on car are as follows: the running frequency of compressor is f, the current rotating speed of inner blower is rin, outer blower
Current rotating speed be rao, throttle valve current aperture be B, then control compressor running frequency from running frequency f raising frequency to
f2, inner blower revolving speed from current rotating speed rinRise to (f2/f1)×rin, outer blower revolving speed from current rotating speed raoIt drops to
(f1/f2)×rao, throttle valve aperture open from current aperture B to (f2/f1)×B；And in Air conditioner on car according to adjustment as above
Parameter afterwards runs the first setting time t1Afterwards, each Parameter reconstruction is controlled to original state, that is, is restored to the operation frequency of compressor
Rate is f, the revolving speed of inner blower is rin, outer blower revolving speed be rao, throttle valve aperture be B.Wherein, f2Can based on test or
Person is empirically determined, such as f2=70-100Hz；Similarly, the first setting time t1It can also be based on test or empirically determined, such as
t1=30s-60s etc..
Increased by control compressor raising frequency, inner blower fall forward, outer blower fall-back, expansion valve opening, this Shen
Control method please can effectively increase the operating pressure of air-conditioning system, promote the flowing velocity of refrigerant, to improve oil return speed
Degree guarantees the normal oil return of compressor.
Referring to Fig. 3, in alternatively possible embodiment, the method for controlling oil return of the application further include: when operation frequency
Rate f is in the first detection cycle T1Inside it is unsatisfactory for f < f1When, compressor is detected in the second detection cycle T2Running frequency f '；Compare
Running frequency f ' and the second predeterminated frequency f2Size；Based on comparative result, selectively control Air conditioner on car runs the last the second
Oil return mode processed.Specifically, when the running frequency f of compressor is in the first detection cycle T1Inside it is unsatisfactory for f < f1When, it was demonstrated that at this time
Compressor is in higher running frequency, although the running frequency is compared to f < f1When the case where be conducive to the oil return of compressor,
But still it cannot be guaranteed that compressor is in preferable oil return effect, it is therefore desirable to further judge oil return effect.At this time
Compressor is detected in the second detection cycle T2Running frequency f ', and compare running frequency f ' and the second predeterminated frequency f2Size,
Oil return mode is forced to judge whether Air conditioner on car needs further to execute second.Wherein, the second predeterminated frequency f2It can be based on
Test is empirically determined, such as f2=70-100Hz.Second detection cycle can equally be based on test or empirically determined, such as T2=
20s-40s etc..Certainly, the second detection cycle T2With the second predeterminated frequency f2Only make exemplary description in this application, in this field
Technical staff can adjust it based on practical application scene, and the application is not construed as limiting this.
In a kind of possible embodiment, " based on comparative result, selectively control Air conditioner on car operation second is forced
The step of oil return mode ", further comprises: when running frequency f ' is in the second detection cycle T2Inside meet f ' >=f always2When, into one
Step obtains the inner coil pipe temperature T of interior radiatorp；Compare inner coil pipe temperature TpWith preset temperature TeSize；Work as Tp< TeWhen, control
Oil return mode is forced in Air conditioner on car operation second processed；Otherwise, current operating conditions are maintained.Specifically, when running frequency f ' is
Two detection cycle T2Inside meet f ' >=f always2When, it was demonstrated that the system pressure in Air conditioner on car is enough, at this pressure the stream of refrigerant
Dynamic property is preferable, and oil return speed is only by the viscosity of refrigerator oil itself.At this point, further judging temperature TpWith default temperature
Spend TeSize, whether the mobility to further determine that cooling body good.Work as Tp≥TeWhen, it was demonstrated that at this time coil temperature compared with
The viscosity of height, refrigerator oil is smaller, good fluidity, and the meeting of compressor at this time is effective to be guaranteed, therefore need to only maintain to work as
Preceding operating status.Work as Tp< TeWhen, it was demonstrated that although system pressure is higher at this time, the viscosity of cooling machine oil is larger, flowing
Property it is bad, therefore, run the second pressure oil return mode at this time and to reduce the viscosity of refrigerator oil improve the flowing of refrigerator oil
Property, guarantee oil return effect.
In a kind of possible embodiment, it will again be assumed that the operating status of current Air conditioner on car are as follows: the operation frequency of compressor
Rate is f, the current rotating speed of inner blower is rin, outer blower current rotating speed be rao, throttle valve current aperture be B, " control is stayed
The step of pressure of vehicle operation of air conditioner second oil return mode ", further comprises: controlling the revolving speed of inner blower by current rotating speed rinRise
To (Te/Tp)×rin, outer blower revolving speed by current rotating speed raoDrop to (Tp/Te)×rao, throttle valve aperture by currently opening
Degree B is opened to (Te/Tp)×B；Continuing the second setting time t2Afterwards, each Parameter reconstruction is controlled to original state, that is, is restored to interior
The revolving speed of blower is rin, outer blower revolving speed be rao, throttle valve aperture be B.Wherein, the second setting time t2It can be based on examination
It tests or empirically determined, such as t2=30s-60s etc..
By in compressor frequency f ' >=f2When, control inner blower fall forward, outer blower fall-back, expansion valve opening
Increase, the control method of the application can be effectively reduced cooling machine oil viscosity, to improve oil return speed, guarantee that compressor is normal
Oil return.
With further reference to Fig. 3, in a kind of possible embodiment, " based on comparative result, selectively control parking is empty
The step of allocation and transportation pressure of row second oil return mode ", further comprises: when running frequency f ' is in the second detection cycle T2It is inside full always
Sufficient f ' < f2When, the running frequency of compressor is controlled from running frequency f ' raising frequency to f2；Control the running frequency raising frequency of compressor extremely
f2While, before or after, obtain the inner coil pipe temperature T of interior radiatorp；Compare inner coil pipe temperature TpWith preset temperature Te
Size；Based on comparative result, selectively oil return mode is forced in control Air conditioner on car operation second.Present embodiment with it is above-mentioned
It is in place of the difference of embodiment, when running frequency f ' is in the second detection cycle T2Inside meet f ' < f always2When, it was demonstrated that at this time
The system pressure of Air conditioner on car is insufficient, and the mobility of refrigerant is poor at this pressure, it is therefore desirable to first control frequency and rise to the
Two predeterminated frequency f2, guarantee that system pressure is enough, be then based on coil pipe temperature in a manner of with the same or similar ground of above embodiment
Control is adjusted to the parameter of Air conditioner on car in the size of degree.Its specific control mode is similar to above embodiment, specifically may be used
Referring to Fig. 3, details are not described herein.
By in compressor frequency f ' < f2When, the frequency for first controlling compressor rises to the second predeterminated frequency f2, then control
Inner blower fall forward processed, outer blower fall-back, expansion valve opening increase, and the control method of the application can effectively increase sky
The operating pressure of adjusting system promotes the flowing velocity of refrigerant, reduces cooling machine oil viscosity, to improve oil return speed, guarantees pressure
The normal oil return of contracting machine.
It should be noted that above-mentioned preferred embodiment is only intended to illustrate the principle of the present invention, it is not intended that in limit
Protection scope of the present invention processed.Under the premise of without departing from the principle of the invention, those skilled in the art can be to above-mentioned setting side
Formula is adjusted, so that the present invention can be suitable for more specifical application scenarios.
For example, the first detection cycle T in a kind of interchangeable embodiment, in above embodiment1, second detection
Cycle T2, the first setting time t1With the second setting time t2Specific value only make exemplary illustration, be not intended to limit this
The protection scope of application, when the control method of the application is applied to different scenes, those skilled in the art can be to above-mentioned number
Value is adaptively adjusted, principle of the adjustment without deviating from the application.
Certainly, between the above-mentioned embodiment that can be replaced and the embodiment that can be replaced and preferred embodiment party
It can also intersect between formula and be used cooperatively, to be combined into new embodiment to be suitable for more specifical application scenarios.
Referring to Fig. 3, a kind of possible implementation process of the application is described.
As shown in figure 3, the driver of haulage truck starts parking under flameout state in a kind of possible implementation process
Air-conditioning detects compressor in the first detection cycle T at this time1Interior frequency f, and it is based on f and the first predeterminated frequency f1Size control
Air conditioner on car, which enters, forces oil return mode.Specific judgement and control process are as follows:
1) when running frequency f is in the first detection cycle T1Inside meet f < f always1When, control Air conditioner on car enters the last the first
Oil return mode processed, i.e. control compressor raising frequency to f2, inner blower revolving speed rise to (f2/f1)×rin, outer rotation speed of fan be down to (f1/
f2)×rao, expansion valve opening opens to (f2/f1) × B, and continue the first setting time t1Afterwards, restore to enter the first pressure oil return
State before mode continues to run.
2) when running frequency f is in the first detection cycle T1Inside it is unsatisfactory for f < f1When, continue to monitor compressor in the second detection
Cycle T2Whether interior running frequency f ' meets f ' >=f always2, if it is satisfied, then further judging the coil pipe temperature of interior radiator
Whether degree meets Tp≥TeIf also met, current operating conditions are maintained；If conditions are not met, then controlling Air conditioner on car enters the
Two force oil return mode, i.e. control inner blower revolving speed rises to (Te/Tp)×rin, outer rotation speed of fan be down to (Tp/Te)×rao, expansion
Valve opening is opened to (Te/Tp) × B, and continue the second setting time t2Afterwards, restore to enter the shape before the second pressure oil return mode
State continues to run.
If 3) in the second detection cycle T2Interior running frequency f ' is unsatisfactory for f ' >=f2, then first compressor frequency is risen to
f2, then further judge whether the coil temperature of interior radiator meets Tp≥Te, if it is satisfied, then maintaining current operation
State；Oil return mode is forced into second if conditions are not met, then controlling Air conditioner on car, i.e. control inner blower revolving speed rises to (Te/Tp)
×rin, outer rotation speed of fan be down to (Tp/Te)×rao, expansion valve opening opens to (Te/Tp) × B, and continue the second setting time t2
Afterwards, restore compressor raising frequency to f2State before continues to run.
It should be noted that although the above-detailed detailed step of the method for the present invention, without departing from this hair
Under the premise of bright basic principle, those skilled in the art can be combined above-mentioned steps, be split and reversed order, so
Modified technical solution does not change basic conception of the invention, therefore also falls within protection scope of the present invention.
So far, it has been combined preferred embodiment shown in the drawings and describes technical solution of the present invention, still, this field
Technical staff is it is easily understood that protection scope of the present invention is expressly not limited to these specific embodiments.Without departing from this
Under the premise of the principle of invention, those skilled in the art can make equivalent change or replacement to the relevant technologies feature, these
Technical solution after change or replacement will fall within the scope of protection of the present invention.
Claims (10)
1. a kind of method for controlling oil return of Air conditioner on car, which is characterized in that the Air conditioner on car includes compressor, indoor radiating
Device, inner blower, throttle valve, outdoor radiator and outer blower, the Air conditioner on car are installed on vehicle, and the vehicle configuration has electric power storage
Pond, the battery are connect with the Air conditioner on car, to power to the Air conditioner on car；The method for controlling oil return includes:
The compressor is detected in the first detection cycle T1Interior running frequency f；
Compare the running frequency and the first predeterminated frequency f1Size；
Based on comparative result, it selectively controls the Air conditioner on car operation first and forces oil return mode.
2. the method for controlling oil return of Air conditioner on car according to claim 1, which is characterized in that " based on comparative result, select
Property control the first pressure of Air conditioner on car operation oil return mode " the step of further comprise:
When the running frequency f is in the first detection cycle T1Inside meet f < f always1When, control the Air conditioner on car operation
Described first forces oil return mode.
3. the method for controlling oil return of Air conditioner on car according to claim 2, which is characterized in that " control the Air conditioner on car
Run it is described first pressure oil return mode " the step of further comprise:
The running frequency of the compressor is controlled from the running frequency f raising frequency to f2, the inner blower revolving speed from current rotating speed
rinRise to (f2/f1)×rin, the outer blower revolving speed from current rotating speed raoDrop to (f1/f2)×rao, the throttle valve
Aperture open from current aperture B to (f2/f1)×B；
After continuing the first setting time, the running frequency for controlling the compressor is downconverted to the revolving speed of frequency f, the inner blower
Drop to revolving speed rin, the outer blower revolving speed rise to revolving speed rao, the throttle valve aperture close to aperture B.
4. the method for controlling oil return of Air conditioner on car according to claim 1, which is characterized in that the method for controlling oil return is also
Include:
When the running frequency f is in the first detection cycle T1Inside it is unsatisfactory for f < f1When, the compressor is detected in the second inspection
Survey cycle T2Running frequency f '；
Compare the running frequency f ' and the second predeterminated frequency f2Size；
Based on comparative result, it selectively controls the Air conditioner on car operation second and forces oil return mode.
5. the method for controlling oil return of Air conditioner on car according to claim 4, which is characterized in that " based on comparative result, select
Property control the second pressure of Air conditioner on car operation oil return mode " the step of further comprise:
When the running frequency f ' is in the second detection cycle T2Inside meet f ' >=f always2When, further obtain the interior
The inner coil pipe temperature T of radiatorp；
Compare the inner coil pipe temperature TpWith preset temperature TeSize；
Based on comparative result, it selectively controls the Air conditioner on car operation described second and forces oil return mode.
6. the method for controlling oil return of Air conditioner on car according to claim 5, which is characterized in that " based on comparative result, select
Property control Air conditioner on car operation the second pressure oil return mode " the step of further comprise:
Work as Tp< TeWhen, it controls the Air conditioner on car operation described second and forces oil return mode.
7. the method for controlling oil return of Air conditioner on car according to claim 6, which is characterized in that " control the Air conditioner on car
Run it is described second pressure oil return mode " the step of further comprise:
The revolving speed of the inner blower is controlled by current rotating speed rinRise to (Te/Tp)×rin, the outer blower revolving speed by current
Revolving speed raoDrop to (Tp/Te)×rao, the throttle valve aperture opened by current aperture B to (Te/Tp)×B；
After continuing the second setting time, the revolving speed for controlling the inner blower drops to revolving speed rin, the outer blower revolving speed on
Rise to revolving speed rao, the throttle valve aperture close to aperture B.
8. the method for controlling oil return of Air conditioner on car according to claim 4, which is characterized in that " based on comparative result, select
Property control Air conditioner on car operation second and force oil return mode " the step of further include:
When the running frequency f ' is in the second detection cycle T2Inside meet f ' < f always2When, control the fortune of the compressor
Line frequency is from the running frequency f ' raising frequency to f2；
The running frequency raising frequency of the compressor is controlled to f2While, before or after, obtain the inner disc of the interior radiator
Tube temperature degree Tp；
Compare the inner coil pipe temperature TpWith preset temperature TeSize；
Based on comparative result, it selectively controls the Air conditioner on car operation described second and forces oil return mode.
9. the method for controlling oil return of Air conditioner on car according to claim 8, which is characterized in that " based on comparative result, select
Property control Air conditioner on car operation the second pressure oil return mode " the step of further comprise:
Work as Tp< TeWhen, it controls the Air conditioner on car operation described second and forces oil return mode.
10. the method for controlling oil return of Air conditioner on car according to claim 9, which is characterized in that " control the Air conditioner on car
Run it is described second pressure oil return mode " the step of further comprise:
The revolving speed of the inner blower is controlled by current rotating speed rinRise to (Te/Tp)×rin, the outer blower revolving speed by current
Revolving speed raoDrop to (Tp/Te)×rao, the throttle valve aperture opened by current aperture B to (Te/Tp)×B；
After continuing the second setting time, the running frequency for controlling the compressor is downconverted to turn of frequency f ', the inner blower
Speed drops to revolving speed rin, the outer blower revolving speed rise to revolving speed rao, the throttle valve aperture close to aperture B.
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| CN201910695608.3A CN110341429B (en) | 2019-07-30 | 2019-07-30 | Oil return control method of parking air conditioner |
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| CN201910695608.3A CN110341429B (en) | 2019-07-30 | 2019-07-30 | Oil return control method of parking air conditioner |
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