CN106247686A - The method for controlling oil return of air-conditioner, oil return control device and air-conditioner - Google Patents
The method for controlling oil return of air-conditioner, oil return control device and air-conditioner Download PDFInfo
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- CN106247686A CN106247686A CN201610677330.3A CN201610677330A CN106247686A CN 106247686 A CN106247686 A CN 106247686A CN 201610677330 A CN201610677330 A CN 201610677330A CN 106247686 A CN106247686 A CN 106247686A
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- Prior art keywords
- conditioner
- air
- oil return
- control
- compressor
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Classifications
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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 invention provides the method for controlling oil return of a kind of air-conditioner, oil return control device and air-conditioner, wherein, described method for controlling oil return, including: indoor environment temperature regulation is made the number of times of compressor shutdown in scheduled duration by statistics air-conditioner to design temperature；If the number of times counting on described compressor shutdown in described scheduled duration reaches set point number; then when described air-conditioner is again by described indoor environment temperature regulation extremely described design temperature; control described compressor to run with preset frequency; and control the default aperture of throttle part unlatching being arranged on the refrigerant pipeline in described air-conditioner, so that described air-conditioner is carried out oil return control.Technical scheme can ensure that the lubricating oil that compressor is discharged in refrigerant pipeline can be back to compressor the most smoothly, and then guarantees have enough lubricating oil to be lubricated inside compressor, improves the reliability of compressor and the stability of system.
Description
Technical field
The present invention relates to air-conditioner technical field, in particular to method for controlling oil return, the Yi Zhongkong of a kind of air-conditioner
Adjust the oil return control device of device and a kind of air-conditioner.
Background technology
Multi-online air-conditioning system is in parallel by one or multiple stage off-premises station, and by pipe arrangement be connected to 2 or 2 with
On indoor set and the refrigeration system that forms, be mainly used in the fields such as office building, apartment hotel, school, villa, hospital of handling official business
Institute.
In multi-online air-conditioning system, often there will be only one or several indoor sets open use for a long time
Situation, when room load design is bigger than normal and time room heat insulation is effective, indoor set is very easy to regulate the temperature in room
To design temperature, at this moment off-premises station can temporarily enter stopped status；After a period of time has passed, indoor temperature changes, room
Outer chance is again turned on, and again shuts down, the most repeatedly when indoor temperature reaches the outer chance of design temperature rear chamber.Due to off-premises station
Frequently start and shutting down, causes the operation that off-premises station can not be continual and steady, and then the high-low pressure pressure reduction of compressor can be caused less,
Lubricating oil can not be back to compressor in time discharging after compressor, so can cause lack oil lubrication inside compressor and
Damage.
Therefore, how it can be avoided that off-premises station is frequently started shooting and shutdown causes compressor to lack lubricating oil and damage, it is ensured that
The reliability service of compressor and the stability of system become technical problem urgently to be resolved hurrily.
Summary of the invention
It is contemplated that at least solve one of technical problem present in prior art or correlation technique.
To this end, it is an object of the present invention to propose the method for controlling oil return of a kind of new air-conditioner, it is ensured that
The lubricating oil that compressor is discharged in refrigerant pipeline can be back to compressor the most smoothly, and then guarantees to have inside compressor foot
Enough lubricating oil is lubricated, and improves the reliability of compressor and the stability of system.
Further object is that correspondence proposes the oil return control device of a kind of air-conditioner and has this oil return
Control the air-conditioner of device.
For achieving the above object, embodiment according to the first aspect of the invention, it is proposed that the oil return control of a kind of air-conditioner
Method processed, including: indoor environment temperature regulation is made compressor shutdown in scheduled duration by statistics air-conditioner to design temperature
Number of times；If the number of times counting on described compressor shutdown in described scheduled duration reaches set point number, then at described air-conditioning
When device is again by described indoor environment temperature regulation extremely described design temperature, controls described compressor and run with preset frequency, and
The throttle part controlling to be arranged on the refrigerant pipeline in described air-conditioner is opened and is preset aperture, to carry out back described air-conditioner
Oil controls.Described throttle part can be electric expansion valve.
The method for controlling oil return of air-conditioner according to an embodiment of the invention, by counting on compressor in scheduled duration
Machine stop times reach set point number (i.e. high frequent startup-shutdown), and indoor environment temperature is regulated to setting by air-conditioner again
During fixed temperature, no longer control compressor shutdown, but control compressor and run with preset frequency, and it is pre-to control throttle part unlatching
If aperture so that compressor is in the case of frequent start-stop, it is possible to control air-conditioner and carry out oil return in time, to improve compressor
High-low pressure pressure reduction, it is ensured that the lubricating oil that compressor is discharged in refrigerant pipeline can be back to compressor the most smoothly, and then really
Protecting has enough lubricating oil to be lubricated inside compressor, improves the reliability of compressor and the stability of system.
Wherein, operating mode when preset frequency during compressor operating can be run according to system is determined, the most in advance
Determine frequency and can be equal to the air-conditioner running frequency when normally heating or freezing, it is also possible to more than air-conditioner normally heating or
Running frequency during refrigeration.
The method for controlling oil return of air-conditioner according to the abovementioned embodiments of the present invention, it is also possible to there is techniques below feature:
According to one embodiment of present invention, again set described in the regulation extremely of described indoor environment temperature at described air-conditioner
During fixed temperature, also include: the indoor fan controlling described air-conditioner runs with the pre-subduing the wind syndrome shelves less than or equal to current wind shelves.
In this embodiment, when indoor environment temperature is regulated to design temperature by air-conditioner, indoor environment temperature is described
Meet the demand of user, detected that the number of times that off-premises station is shut down reaches setting time owing to the technical scheme is that
After number, if indoor environment temperature is regulated to design temperature by air-conditioner again, the most no longer control compressor shutdown, therefore to
Ensure that user uses the comfort level of air-conditioner, the indoor fan of air-conditioner can be controlled with less than or equal to current wind shelves (the most just
Wind shelves when often heating or freeze) pre-subduing the wind syndrome shelves run.Preferably, pre-subduing the wind syndrome shelves can be minimum wind shelves.
In the above-described embodiments, further, in the case of described air-conditioner is multi-gang air-conditioner device, described sky is controlled
The step adjusting the indoor fan of device to run with the pre-subduing the wind syndrome shelves less than or equal to current wind shelves, specifically includes: detect described multi-joint
The duty of all indoor sets in air conditioner device；Control the blower fan in running order indoor set with described pre-subduing the wind syndrome
Shelves run.
In this embodiment, owing to multi-gang air-conditioner device contains multiple stage indoor set, therefore in running order
Indoor set, can control its internal blower fan and run with above-mentioned pre-subduing the wind syndrome shelves.Additionally, for the indoor being in stopped status
Machine, its internal blower fan still remains shut off state.
According to one embodiment of present invention, in the case of described air-conditioner is multi-gang air-conditioner device, control to be arranged on
Throttle part on refrigerant pipeline in described air-conditioner opens the step presetting aperture, specifically includes: control described multi-connected machine
Throttle part in all indoor sets of air-conditioner opens described predetermined aperture.
In this embodiment, owing to multi-gang air-conditioner device contains multiple stage indoor set, the most no matter it is in duty
Indoor set be in the indoor set of stopped status, the throttle part that can control on its internal refrigerant pipeline is opened predetermined
Aperture, so that the lubricating oil of residual is back to compressor in the refrigerant pipeline within whole multi-gang air-conditioner device.
According to one embodiment of present invention, described method for controlling oil return, also include: add up described air-conditioner and carry out back
The duration that oil controls；When the duration that described air-conditioner carries out oil return control reaches to set duration, control described air-conditioner and exit
Oil return controls process.
Wherein, after controlling air-conditioner and exiting oil return control process, air-conditioner carries out work according to the normal logic that controls
Making, such as ran before carrying out oil return control is heating mode, then continue to run with heating mode.
Embodiment according to a second aspect of the present invention, it is also proposed that the oil return control device of a kind of air-conditioner, including: statistics
Unit, makes the secondary of compressor shutdown for adding up air-conditioner in scheduled duration by indoor environment temperature regulation to design temperature
Number；Control unit, reaches for counting on the number of times of described compressor shutdown in described scheduled duration when described statistic unit
During set point number, if described air-conditioner is again by described indoor environment temperature regulation extremely described design temperature, then control described pressure
Contracting machine runs with preset frequency, and the throttle part controlling to be arranged on the refrigerant pipeline in described air-conditioner is opened to preset and opened
Degree, to carry out oil return control to described air-conditioner.
The oil return control device of air-conditioner according to an embodiment of the invention, by counting on compressor in scheduled duration
Machine stop times reach set point number (i.e. high frequent startup-shutdown), and indoor environment temperature is regulated to setting by air-conditioner again
During fixed temperature, no longer control compressor shutdown, but control compressor and run with preset frequency, and it is pre-to control throttle part unlatching
If aperture so that compressor is in the case of frequent start-stop, it is possible to control air-conditioner and carry out oil return in time, to improve compressor
High-low pressure pressure reduction, it is ensured that the lubricating oil that compressor is discharged in refrigerant pipeline can be back to compressor the most smoothly, and then really
Protecting has enough lubricating oil to be lubricated inside compressor, improves the reliability of compressor and the stability of system.Described
Throttle part can be electric expansion valve.
Wherein, operating mode when preset frequency during compressor operating can be run according to system is determined, the most in advance
Determine frequency and can be equal to the air-conditioner running frequency when normally heating or freezing, it is also possible to more than air-conditioner normally heating or
Running frequency during refrigeration.
The oil return control device of air-conditioner according to the abovementioned embodiments of the present invention, it is also possible to there is techniques below feature:
According to one embodiment of present invention, described control unit is additionally operable to: at described air-conditioner again by described indoor
When ambient temperature regulation is to described design temperature, control pre-with less than or equal to current wind shelves of the indoor fan of described air-conditioner
Subduing the wind syndrome shelves run.
In this embodiment, when indoor environment temperature is regulated to design temperature by air-conditioner, indoor environment temperature is described
Meet the demand of user, detected that the number of times that off-premises station is shut down reaches setting time owing to the technical scheme is that
After number, if indoor environment temperature is regulated to design temperature by air-conditioner again, the most no longer control compressor shutdown, therefore to
Ensure that user uses the comfort level of air-conditioner, the indoor fan of air-conditioner can be controlled with less than or equal to current wind shelves (the most just
Wind shelves when often heating or freeze) pre-subduing the wind syndrome shelves run.Preferably, pre-subduing the wind syndrome shelves can be minimum wind shelves.
According to one embodiment of present invention, in the case of described air-conditioner is multi-gang air-conditioner device, described control is single
Unit specifically for: detect the duty of all indoor sets in described multi-gang air-conditioner device, and control in running order
Blower fan in indoor set runs with described pre-subduing the wind syndrome shelves.
In this embodiment, owing to multi-gang air-conditioner device contains multiple stage indoor set, therefore in running order
Indoor set, can control its internal blower fan and run with above-mentioned pre-subduing the wind syndrome shelves.Additionally, for the indoor being in stopped status
Machine, its internal blower fan still remains shut off state.
According to one embodiment of present invention, in the case of described air-conditioner is multi-gang air-conditioner device, described control is single
Unit specifically for: control throttle part in all indoor sets of described multi-gang air-conditioner device and open described predetermined aperture.
In this embodiment, owing to multi-gang air-conditioner device contains multiple stage indoor set, the most no matter it is in duty
Indoor set be in the indoor set of stopped status, the throttle part that can control on its internal refrigerant pipeline is opened predetermined
Aperture, so that the lubricating oil of residual is back to compressor in the refrigerant pipeline within whole multi-gang air-conditioner device.
According to one embodiment of present invention, described statistic unit is additionally operable to, and adds up described air-conditioner and carries out oil return control
Duration；Described control unit is additionally operable to, and when the duration that described air-conditioner carries out oil return control reaches to set duration, controls institute
State air-conditioner and exit oil return control process.
Wherein, after controlling air-conditioner and exiting oil return control process, air-conditioner carries out work according to the normal logic that controls
Making, such as ran before carrying out oil return control is heating mode, then continue to run with heating mode.
Embodiment according to a third aspect of the present invention, it is also proposed that a kind of air-conditioner, including: as arbitrary in above-described embodiment
The oil return control device of the air-conditioner described in Xiang.
The additional aspect of the present invention and advantage will part be given in the following description, and part will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from combining the accompanying drawings below description to embodiment and will become
Substantially with easy to understand, wherein:
Fig. 1 shows the schematic flow diagram of the method for controlling oil return of air-conditioner according to first embodiment of the invention；
Fig. 2 shows the schematic block diagram of the oil return control device of air-conditioner according to an embodiment of the invention；
Fig. 3 shows the schematic block diagram of air-conditioner according to an embodiment of the invention；
Fig. 4 shows the schematic flow diagram of the method for controlling oil return of the air-conditioner of second embodiment according to the present invention.
Detailed description of the invention
In order to be more clearly understood that the above-mentioned purpose of the present invention, feature and advantage, real with concrete below in conjunction with the accompanying drawings
The present invention is further described in detail by mode of executing.It should be noted that in the case of not conflicting, the enforcement of the application
Feature in example and embodiment can be mutually combined.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but, the present invention also may be used
Implementing to use other to be different from other modes described here, therefore, protection scope of the present invention is not by described below
The restriction of specific embodiment.
Technical scheme mainly carries out oil return control to air-conditioner, and specifically, the compressor in air-conditioner exists
In work process, discharged the coolant of High Temperature High Pressure by high-pressure mouth, and the coolant discharged can carry lubricating oil, these lubrications
Oil flows in whole refrigeration system along with coolant, finally can be back to the low-pressure inlet of compressor.When high frequent is started shooting
With when shutting down, the high-low pressure pressure reduction that can cause compressor is less, and then causes lubricating oil can not return in time after discharging compressor
It is back to compressor, so can cause and lack oil lubrication inside compressor and damage.Based on this, the present invention propose oil return control
Method processed is specific as follows:
Fig. 1 shows the schematic flow diagram of the method for controlling oil return of air-conditioner according to first embodiment of the invention.
As it is shown in figure 1, the method for controlling oil return of air-conditioner according to first embodiment of the invention, including:
Step S10, indoor environment temperature regulation is made compressor in scheduled duration by statistics air-conditioner to design temperature
The number of times shut down.
Specifically, when indoor environment temperature is regulated to design temperature by air-conditioner, off-premises station can temporarily enter shutdown shape
State；After a period of time has passed, indoor temperature changes, and off-premises station can be again turned on, when indoor temperature reaches design temperature
The outer chance of rear chamber is shut down, the most again.Step S10 is added up air-conditioner regulated by indoor environment temperature in scheduled duration
The number of times making compressor shutdown to design temperature is to determine compressor the most frequently startup-shutdown.
Step S12, if the number of times counting on described compressor shutdown in described scheduled duration reaches set point number, then exists
When described air-conditioner is again by described indoor environment temperature regulation extremely described design temperature, control described compressor with preset frequency
Run, and the throttle part controlling to be arranged on the refrigerant pipeline in described air-conditioner is opened and preset aperture, with to described air-conditioning
Device carries out oil return control.Described throttle part can be electric expansion valve.
Specifically, when the number of times counting on described compressor shutdown in scheduled duration reaches set point number, description
High frequent startup-shutdown.Therefore, when indoor environment temperature is regulated to design temperature by air-conditioner again, compression is no longer controlled
Machine is shut down, but controls compressor and run with preset frequency, and control throttle part is opened and preset aperture so that compressor is at frequency
In the case of numerous start and stop, it is possible to control air-conditioner and carry out oil return in time, to improve the high-low pressure pressure reduction of compressor, it is ensured that compressor
The lubricating oil being discharged in refrigerant pipeline can be back to compressor the most smoothly, and then guarantees there are enough profits inside compressor
Lubricating oil is lubricated, and improves the reliability of compressor and the stability of system.
Wherein, operating mode when preset frequency during compressor operating can be run according to system is determined, the most in advance
Determine frequency and can be equal to the air-conditioner running frequency when normally heating or freezing, it is also possible to more than air-conditioner normally heating or
Running frequency during refrigeration.
In order to ensure that user uses the comfortableness of air-conditioner, when air-conditioner sets again described in indoor environment temperature regulation extremely
During fixed temperature, the method for controlling oil return that the present invention proposes also includes: control the indoor fan of described air-conditioner to be less than or equal to
The pre-subduing the wind syndrome shelves of current wind shelves run.
Specifically, when indoor environment temperature is regulated to design temperature by air-conditioner, illustrate that indoor environment temperature is
Meet the demand of user, due to the technical scheme is that detect the number of times that off-premises station is shut down reach set point number it
After, if indoor environment temperature is regulated to design temperature by air-conditioner again, the most no longer control compressor shutdown, therefore to ensure
User uses the comfort level of air-conditioner, can control the indoor fan of air-conditioner (the most normally to make less than or equal to current wind shelves
Heat or refrigeration time wind shelves) pre-subduing the wind syndrome shelves run.Preferably, pre-subduing the wind syndrome shelves can be minimum wind shelves.
The technical scheme that the present invention proposes is applicable not only to common domestic air conditioner, and is also applied for multi-gang air-conditioner
Device, specifically:
For multi-gang air-conditioner device, the above-mentioned indoor fan controlling described air-conditioner is with less than or equal to current wind shelves
The step that pre-subduing the wind syndrome shelves run, specifically includes: detect the duty of all indoor sets in described multi-gang air-conditioner device；Control
The in running order blower fan in indoor set runs with described pre-subduing the wind syndrome shelves.
Specifically, owing to multi-gang air-conditioner device contains multiple stage indoor set, therefore in running order indoor set,
Its internal blower fan can be controlled run with above-mentioned pre-subduing the wind syndrome shelves.Additionally, for the indoor set being in stopped status, inside it
Blower fan still remain shut off state.
Additionally, for multi-gang air-conditioner device, above-mentioned control is arranged on the throttling on the refrigerant pipeline in described air-conditioner
Parts open the step presetting aperture, specifically include: control the throttle part in all indoor sets of described multi-gang air-conditioner device
Open described predetermined aperture.
Specifically, owing to multi-gang air-conditioner device contains multiple stage indoor set, the room of duty the most no matter it is in
Interior machine is in the indoor set of stopped status, and the throttle part that can control on its internal refrigerant pipeline opens predetermined opening
Degree, so that the lubricating oil of residual is back to compressor in the refrigerant pipeline within whole multi-gang air-conditioner device.
In one embodiment of the invention, the method for controlling oil return shown in Fig. 1 also includes: adds up described air-conditioner and enters
The duration that row oil return controls；When the duration that described air-conditioner carries out oil return control reaches to set duration, control described air-conditioner
Exit oil return and control process.
Wherein, after controlling air-conditioner and exiting oil return control process, air-conditioner carries out work according to the normal logic that controls
Making, such as ran before carrying out oil return control is heating mode, then continue to run with heating mode.
Fig. 2 shows the schematic block diagram of the oil return control device of air-conditioner according to an embodiment of the invention.
As in figure 2 it is shown, the oil return control device 200 of air-conditioner according to an embodiment of the invention, including: statistic unit
202 and control unit 204.
Wherein, statistic unit 202 is used for adding up air-conditioner and regulates indoor environment temperature to setting temperature in scheduled duration
Spend and make the number of times of compressor shutdown；Control unit 204 is for counting in described scheduled duration when described statistic unit 202
When the number of times of described compressor shutdown reaches set point number, if described indoor environment temperature is regulated to institute by described air-conditioner again
State design temperature, then control described compressor and run with preset frequency, and control to be arranged on the refrigerant pipeline in described air-conditioner
On throttle part open preset aperture, so that described air-conditioner is carried out oil return control.Described throttle part can be electronics
Expansion valve.
Specifically, by count in scheduled duration the machine stop times of compressor reach set point number (i.e. compressor frequency
Numerous startup-shutdown), and when indoor environment temperature is regulated to design temperature by air-conditioner again, no longer control compressor shutdown, but
Control compressor to run with preset frequency, and control the default aperture of throttle part unlatching so that compressor is in the feelings of frequent start-stop
Under condition, it is possible to control air-conditioner and carry out oil return in time, to improve the high-low pressure pressure reduction of compressor, it is ensured that compressor is discharged to coolant
Lubricating oil in pipeline can be back to compressor the most smoothly, and then guarantees have enough lubricating oil to moisten inside compressor
Sliding, improve the reliability of compressor and the stability of system.
Wherein, operating mode when preset frequency during compressor operating can be run according to system is determined, the most in advance
Determine frequency and can be equal to the air-conditioner running frequency when normally heating or freezing, it is also possible to more than air-conditioner normally heating or
Running frequency during refrigeration.
The oil return control device 200 of air-conditioner according to the abovementioned embodiments of the present invention, it is also possible to there is techniques below special
Levy:
In one embodiment of the invention, described control unit 204 is additionally operable to: at described air-conditioner again by described room
When the regulation of interior ambient temperature is to described design temperature, control the indoor fan of described air-conditioner with less than or equal to current wind shelves
Pre-subduing the wind syndrome shelves run.
In this embodiment, when indoor environment temperature is regulated to design temperature by air-conditioner, indoor environment temperature is described
Meet the demand of user, detected that the number of times that off-premises station is shut down reaches setting time owing to the technical scheme is that
After number, if indoor environment temperature is regulated to design temperature by air-conditioner again, the most no longer control compressor shutdown, therefore to
Ensure that user uses the comfort level of air-conditioner, the indoor fan of air-conditioner can be controlled with less than or equal to current wind shelves (the most just
Wind shelves when often heating or freeze) pre-subduing the wind syndrome shelves run.Preferably, pre-subduing the wind syndrome shelves can be minimum wind shelves.
In one embodiment of the invention, in the case of described air-conditioner is multi-gang air-conditioner device, described control is single
Unit 204 specifically for: detect the duty of all indoor sets in described multi-gang air-conditioner device, and control in running order
Indoor set in blower fan run with described pre-subduing the wind syndrome shelves.
In this embodiment, owing to multi-gang air-conditioner device contains multiple stage indoor set, therefore in running order
Indoor set, can control its internal blower fan and run with above-mentioned pre-subduing the wind syndrome shelves.Additionally, for the indoor being in stopped status
Machine, its internal blower fan still remains shut off state.
In one embodiment of the invention, in the case of described air-conditioner is multi-gang air-conditioner device, described control is single
Unit 204 specifically for: control throttle part in all indoor sets of described multi-gang air-conditioner device and open described predetermined aperture.
In this embodiment, owing to multi-gang air-conditioner device contains multiple stage indoor set, the most no matter it is in duty
Indoor set be in the indoor set of stopped status, the throttle part that can control on its internal refrigerant pipeline is opened predetermined
Aperture, so that the lubricating oil of residual is back to compressor in the refrigerant pipeline within whole multi-gang air-conditioner device.
In one embodiment of the invention, described statistic unit 202 is additionally operable to, and adds up described air-conditioner and carries out oil return control
The duration of system；Described control unit 204 is additionally operable to, when the duration that described air-conditioner carries out oil return control reaches to set duration,
Control described air-conditioner and exit oil return control process.
Wherein, after controlling air-conditioner and exiting oil return control process, air-conditioner carries out work according to the normal logic that controls
Making, such as ran before carrying out oil return control is heating mode, then continue to run with heating mode.
Fig. 3 shows the schematic block diagram of air-conditioner according to an embodiment of the invention.
As it is shown on figure 3, air-conditioner 300 according to an embodiment of the invention, including: the returning of air-conditioner as shown in Figure 2
Oil controls device 200.
Below as a example by multi-gang air-conditioner device, technical scheme is described in detail:
As shown in Figure 4, according to the method for controlling oil return of the air-conditioner of second embodiment of the present invention, including:
Step 402, the off-premises station start of multi-gang air-conditioner device runs.
Step 404, the operational factor of detecting system, after indoor set is by indoor temperature regulation to design temperature, off-premises station
Can shut down, the machine stop times of record off-premises station.
Step 406, it is judged that within the t time, whether the machine stop times of off-premises station reaches set point number, the most then perform step
Rapid 408；Otherwise, step 404 is returned.
Step 408, the operational factor of detecting system, after indoor set is by indoor temperature regulation to design temperature, off-premises station
Do not shut down.
Step 410, controls compressor and runs with target frequency, for the interior machine opened, controls blower fan low wind shelves and runs, and
Control electric expansion valve and open certain aperture, as electric expansion valve can be opened into electronics when multi-gang air-conditioner device is shut down
Expansion valve opening；For the interior machine closed, control blower fan and continue to shut down, and control the aperture that electric expansion valve unlatching is certain.
Specifically, for multi-gang air-conditioner device, machine start in having part, when the interior office of part closes, closedown interior
Electric expansion valve in machine is to close, it is therefore desirable to controls electric expansion valve and opens certain aperture.
Step 412, it is judged that whether the pressure oil return time of multi-gang air-conditioner device reaches the setting time, the most then to perform step
Rapid 414；Otherwise, step 410 is returned.
Step 414, exits pressure oil return process, according to normal logic control air-conditioner.
Technical scheme being described in detail above in association with accompanying drawing, the present invention proposes returning of a kind of new air-conditioner
Oil control program, it is ensured that the lubricating oil that compressor is discharged in refrigerant pipeline can be back to compressor the most smoothly, enters
And guarantee inside compressor, have enough lubricating oil to be lubricated, improve the reliability of compressor and the stability of system.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (11)
1. the method for controlling oil return of an air-conditioner, it is characterised in that including:
Indoor environment temperature regulation is made the number of times of compressor shutdown in scheduled duration by statistics air-conditioner to design temperature；
If the number of times counting on described compressor shutdown in described scheduled duration reaches set point number, then at described air-conditioner again
Secondary by the regulation of described indoor environment temperature to described design temperature time, control described compressor and run with preset frequency, and control
The throttle part being arranged on the refrigerant pipeline in described air-conditioner is opened and is preset aperture, so that described air-conditioner is carried out oil return control
System.
The method for controlling oil return of air-conditioner the most according to claim 1, it is characterised in that at described air-conditioner again by institute
When stating indoor environment temperature regulation to described design temperature, also include:
The indoor fan controlling described air-conditioner runs with the pre-subduing the wind syndrome shelves less than or equal to current wind shelves.
The method for controlling oil return of air-conditioner the most according to claim 2, it is characterised in that be multi-connected machine at described air-conditioner
In the case of air-conditioner, control the step that the indoor fan of described air-conditioner runs with the pre-subduing the wind syndrome shelves less than or equal to current wind shelves
Suddenly, specifically include:
Detect the duty of all indoor sets in described multi-gang air-conditioner device；
The blower fan controlled in running order indoor set runs with described pre-subduing the wind syndrome shelves.
The method for controlling oil return of air-conditioner the most according to any one of claim 1 to 3, it is characterised in that at described sky
In the case of adjusting device to be multi-gang air-conditioner device, the throttle part controlling to be arranged on the refrigerant pipeline in described air-conditioner is opened pre-
If the step of aperture, specifically include:
Control the throttle part in all indoor sets of described multi-gang air-conditioner device and open described predetermined aperture.
The method for controlling oil return of air-conditioner the most according to any one of claim 1 to 3, it is characterised in that also include:
Add up described air-conditioner and carry out the duration of oil return control；
Described air-conditioner carry out the duration of oil return control reach to set duration time, control described air-conditioner and exit oil return and controlled
Journey.
6. the oil return control device of an air-conditioner, it is characterised in that including:
Statistic unit, is used for adding up air-conditioner and indoor environment temperature regulation makes to design temperature in scheduled duration compressor
The number of times shut down；
Control unit, reaches for counting on the number of times of described compressor shutdown in described scheduled duration when described statistic unit
During set point number, if described air-conditioner is again by described indoor environment temperature regulation extremely described design temperature, then control described pressure
Contracting machine runs with preset frequency, and the throttle part controlling to be arranged on the refrigerant pipeline in described air-conditioner is opened to preset and opened
Degree, to carry out oil return control to described air-conditioner.
The oil return control device of air-conditioner the most according to claim 6, it is characterised in that described control unit is additionally operable to:
When described air-conditioner is again by described indoor environment temperature regulation extremely described design temperature, control the room of described air-conditioner
Inner blower runs with the pre-subduing the wind syndrome shelves less than or equal to current wind shelves.
The oil return control device of air-conditioner the most according to claim 7, it is characterised in that be multi-connected machine at described air-conditioner
In the case of air-conditioner, described control unit specifically for:
Detect the duty of all indoor sets in described multi-gang air-conditioner device, and control in running order indoor set
Blower fan run with described pre-subduing the wind syndrome shelves.
9. according to the oil return control device of the air-conditioner according to any one of claim 6 to 8, it is characterised in that at described sky
Adjust in the case of device is multi-gang air-conditioner device, described control unit specifically for: control being had family of described multi-gang air-conditioner device
Throttle part in interior machine opens described predetermined aperture.
10. according to the oil return control device of the air-conditioner according to any one of claim 6 to 8, it is characterised in that:
Described statistic unit is additionally operable to, and adds up described air-conditioner and carries out the duration of oil return control；
Described control unit is additionally operable to, and when the duration that described air-conditioner carries out oil return control reaches to set duration, controls described
Air-conditioner exits oil return and controls process.
11. 1 kinds of air-conditioners, it is characterised in that including: the oil return control of the air-conditioner as according to any one of claim 6 to 10
Device processed.
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| CN201610677330.3A CN106247686B (en) | 2016-08-16 | 2016-08-16 | Method for controlling oil return, oil return control device and the air conditioner of air conditioner |
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| CN201610677330.3A CN106247686B (en) | 2016-08-16 | 2016-08-16 | Method for controlling oil return, oil return control device and the air conditioner of air conditioner |
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