CN110398078A - Multi-split air conditioner oil return control method and multi-split air conditioner with same - Google Patents
Multi-split air conditioner oil return control method and multi-split air conditioner with same Download PDFInfo
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- CN110398078A CN110398078A CN201910650600.5A CN201910650600A CN110398078A CN 110398078 A CN110398078 A CN 110398078A CN 201910650600 A CN201910650600 A CN 201910650600A CN 110398078 A CN110398078 A CN 110398078A
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000004378 air conditioning Methods 0.000 claims description 48
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 119
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000001186 cumulative effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a multi-split oil return control method, which is characterized by comprising the following steps: the device has two modes of a daytime oil return mode and a night oil return mode; and executing the night oil return mode only when the continuous operation time of the compressor is larger than the preset value, the operation load of the unit is in a preset load interval, the operation frequency of the compressor is in a preset frequency interval, the ratio of the outdoor environment temperature of the air conditioner in daytime operation to the outdoor environment temperature of the air conditioner in night operation is smaller than 1 and other requirements are met, otherwise, executing the day oil return mode. Through above-mentioned technical scheme, avoided the indoor difference in temperature change too fast that leads to because of frequent oil return when the unit is in the time of the light load operation at night, leaded to the travelling comfort worsen and the high problem of power consumption.
Description
Technical field
The present invention relates to air-conditioning technical fields, and in particular to a kind of multi-connected machine method for controlling oil return has its multi-connected machine sky
It adjusts.
Background technique
With the improvement of living standards, home multi-line is gradually come into people's lives, compared with upper outlet air multi-connected machine,
Side air-out multi-connected machine has the characteristics that suitable house and small commercial place compact-sized, easy for installation use, in recent years living extensively
Jump is liked and is favored by user in each small-sized household place.The general and common split air conditioner peace for home multi-line
Holding position is identical, to the more demanding of noise and comfort.Currently, multi-connected machine user's ordinary circumstance when running at night uses
1-2 interior machines, comparatively unit operating load is small, but requirement to noise and comfort is high, and circuit control to
Upper parameter is affected.
Conventional oil return control be increase system pressure difference by increasing compressor frequency, thus by system refrigerant with
Lubricating oil takes back compressor and achievees the purpose that oil return, but night when human body enters sleep state, when compressor frequency increases,
Indoor difference variation is too fast, the noise that the oil return of compressor high frequency generates therewith, under the environment of night peace and quiet, the experience of user
Property and comfort is deteriorated and the power of compressor increases when high frequency is run, the efficiency of complete machine reduces, and the power consumption of user increases
Add, the risk complained after sale is big, therefore conventional oil return control is unable to satisfy state of the unit in the operation of night Smaller load.
Summary of the invention
In consideration of it, the present invention provides a kind of multi-connected machine method for controlling oil return, can solve to run when unit in night Smaller load
When avoid because of frequent oil return caused by indoor difference variation is fast, comfort is deteriorated and power consumption is high problem, it is specific:
In a first aspect, the present invention provides a kind of multi-connected machine method for controlling oil return, there is oil return on daytime mode and night oil return
Mode both of which；
When only meeting following full terms, night oil return mode is just executed, otherwise executes oil return on daytime mode；
(1) continuous operating time of compressor is greater than preset value t0, i.e. T >=t0；
(2) operating load of unit is in default load setting, i.e. Q1≤W≤Q2；
(3) running frequency of compressor is in predeterminated frequency section, i.e. f1 < F≤f2；
(4) outdoor environment temperature of operation on air-conditioning daytime and the outdoor environment temperature ratio of night operation are less than 1, i.e. T1/
T2 < 1；
(5) set temperature of the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and the operation of air-conditioning night
Ratio with the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；
Further, after air-conditioning booting, first determine whether the continuous operating time T of compressor is more than or equal to preset value
t0；If being unsatisfactory for T >=t0, oil return on daytime mode is executed；If T meets T >=t0, carry out unit operating load whether
In default load setting, i.e. Q1≤W≤Q2 judgement.
Further, judge the operating load of unit whether in default load setting, i.e. Q1≤W≤Q2；If W is unsatisfactory for
Q1≤W≤Q2 then executes oil return on daytime mode；The running frequency of compressor is carried out if W meets Q1≤W≤Q2 whether pre-
If frequency separation, i.e. the judgement of f1 < F≤f2.
Further, judge the running frequency for carrying out compressor whether in predeterminated frequency section, i.e. f1 < F≤f2；If F
It is unsatisfactory for f1 < F≤f2, then executes oil return on daytime mode；If compressor operating frequency meets f1 < F≤f2, air-conditioning is carried out
Whether the outdoor environment temperature of operation on daytime and the outdoor environment temperature ratio of night operation are less than 1, i.e. the judgement of T1/T2 < 1.
Further, judge the outdoor environment temperature ratio that runs with night of outdoor environment temperature of operation on air-conditioning daytime i.e.
Whether T1/T2 is less than 1；If T1/T2 is unsatisfactory for T1/T2 < 1, oil return on daytime mode is executed；If T1/T2 meets T1/T2
< 1 then carries out the set temperature of the set temperature of air-conditioning operation on daytime and the difference of indoor environment temperature and the operation of air-conditioning night
Ratio with the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)NightThe judgement of < 1.
Further, judge that the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and air-conditioning night are run
Set temperature and indoor environment temperature difference ratio whether less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；Such as
Fruit (T sets-T ring)Daytime/ (T sets-T ring)NightIt is unsatisfactory for (T sets-T ring)Daytime/ (T sets-T ring) night < 1, then execute oil return on daytime mould
Formula；(if T sets-T ring)Daytime/ (T sets-T ring)NightMeet (T sets-T ring)Daytime/ (T sets-T ring)Night< 1 then executes night oil return mould
Formula.
Further, continue to start a new wheel logic judgment, any of them one after night oil return mode executes
Step monitoring result is when being unsatisfactory for, then to execute oil return on daytime mode.
Second aspect, the present invention provide a kind of multi-connected machine method for controlling oil return, which includes the following steps:
S1: air-conditioning booting；
S2: judge whether the continuous operating time T of compressor is more than or equal to preset value t0；
S21: if it is not, then executing oil return on daytime mode；
S22: judge in next step if so, entering；
S3: judge the operating load of unit whether in load setting, i.e. Q1≤W≤Q2；
S31: if it is not, then executing oil return on daytime mode；
S32: judge in next step if so, entering；
S4: judge the running frequency of compressor whether in predeterminated frequency section, i.e. f1 < F≤f2；
S41: if it is not, then executing oil return on daytime mode；
S42: judge in next step if so, entering；
S5: judge the outdoor environment temperature of operation on air-conditioning daytime and the outdoor environment temperature ratio i.e. T1/T2 of night operation
Whether less than 1, i.e. T1/T2 < 1；
S51: if it is not, then executing oil return on daytime mode；
S52: judge in next step if so, entering；
S6: judge the setting of the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and the operation of air-conditioning night
Whether the ratio of temperature and the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；
S61: if it is not, then executing oil return on daytime mode；
S62: if it is, executing night oil return mode；
S7: continue to start a new wheel logic judgment after night oil return mode executes.
Further, night oil return mode executes lower oil return frequency than oil return on daytime mode.
Further, night oil return mode is Intelligent noise reduction oil return；Oil return on the daytime mode is conventional oil return.
Further, Intelligent noise reduction oil return is night not oil return.
The third aspect, the present invention also provides a kind of multi-gang air-conditioners, have any one multi-connected machine oil return described above
Control method.
The present invention provides a kind of multi-connected machine method for controlling oil return and with its multi-gang air-conditioner, there is oil return on daytime mould
Two kinds of operating modes of formula and night oil return mode, pass through operating load compressor frequency section, the room at night and daytime of unit
The difference of the use habit set temperature and indoor environment temperature of the outer temperature difference and user runs to distinguish unit daytime and night
Operating status, achieve the purpose that oil return night not oil return on daytime can solve when unit night Smaller load operation when avoid because frequency
The problem that interior difference variation caused by numerous oil return is fast, comfort is deteriorated and power consumption is high.
Detailed description of the invention
It is described in detail its example embodiment by referring to accompanying drawing, above and other target disclosed by the invention, feature and excellent
Point will become apparent.Drawings discussed below is only some embodiments disclosed by the invention, for this field
For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the logic chart of multi-connected machine method for controlling oil return in one embodiment of the invention；
In figure:
T- compressor Cumulative Elapsed Time；W- unit operating load；F- compressor frequency section；T1- outer ring on daytime temperature；
T2- night outer ring temperature；T sets-set temperature of air-conditioning；T ring-indoor environment temperature；
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The term used in embodiments of the present invention is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The present invention.In the embodiment of the present invention and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning, " a variety of " generally comprise at least two, but not
It excludes to include at least one situation.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
Include, so that commodity or system including a series of elements not only include those elements, but also including not clear
The other element listed, or further include for this commodity or the intrinsic element of system.In the feelings not limited more
Under condition, the element that is limited by sentence "including a ...", it is not excluded that in the commodity or system for including the element also
There are other identical elements.
Currently, conventional oil return refers to when compressor Cumulative Elapsed Time reaches the preset value of system, compressed by increasing
Unit frequency increases system pressure difference, thus by system refrigerant and lubricating oil take back compressor and achieve the purpose that oil return.But
When compressor frequency increases, not only indoor difference variation is too fast, the noise that the oil return of compressor high frequency generates therewith, at night
Under quiet environment, the experience property and comfort of user is deteriorated, and and high frequency when running the power of compressor increase, it is whole
The efficiency of machine reduces, and the power consumption of user increases, and increases the risk complained after sale.
The present invention provides a kind of multi-connected machine method for controlling oil return, has two kinds of moulds of oil return on daytime mode and night oil return mode
Formula；Only all meet operating load and compressor frequency section, the outdoor temperature difference at night and daytime and the user of unit
After the condition of use habit set temperature and the indoor temperature difference requires, night oil return mode could be executed and enter Intelligent noise reduction time
Oil, it is too fast to solve indoor difference variation caused by avoiding because of frequent oil return when unit is in the operation of night Smaller load, causes to relax
The problem that adaptive is deteriorated and power consumption is high.
In the embodiment of the present invention, it is preferred that oil return on daytime mode is executed, into conventional oil return, it can be understood as above-mentioned normal
Advise oil return.Night oil return mode is executed, the Intelligent noise reduction oil return of entrance is relative to above-mentioned conventional oil return, and oil return frequency is smaller,
The operating mode of the less even not oil return of recirculating oil quantity.Further preferred not oil return in the present embodiment.
The present embodiment provides a multi-gang air-conditioners, with a kind of multi-connected machine method for controlling oil return and step, such as Fig. 1 institute
Show that there is oil return on daytime mode and night oil return mode both of which；
When only meeting following full terms, night oil return mode is just executed, otherwise executes oil return on daytime mode；
(1) continuous operating time of compressor is greater than preset value t0, i.e. T >=t0；
(2) operating load of unit is in default load setting, i.e. Q1≤W≤Q2；Wherein Q1 is the capacity of indoor unit operation
The sum of minimum value, Q2 refers to the maximum value of the sum of capacity of indoor unit operation；
(3) running frequency of compressor is in predeterminated frequency section, i.e. f1 < F≤f2；
(4) outdoor environment temperature of operation on air-conditioning daytime and the outdoor environment temperature ratio of night operation are less than 1, i.e. T1/
T2 < 1；
(5) set temperature of the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and the operation of air-conditioning night
Ratio with the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1.User is on daytime and night
Use demand to air-conditioning is different.Outdoor environment temperature is high when daytime, and background noise is big, what user mainly pursued
It is fast-refrigerating, and outdoor temperature is low when evening, background noise is small, and user pursues the sleep of high quality to mute and easypro
Adaptive requires higher.It is preferred, therefore, that the set temperature of operation on air-conditioning daytime and the set temperature of air-conditioning night operation can roots
Different values are set from night outdoor temperature difference according to the use habit and daytime of user.
Preferably, after air-conditioning booting, first determine whether the continuous operating time T of compressor is more than or equal to preset value t0；
If being unsatisfactory for T >=t0, oil return on daytime mode is executed, into conventional oil return；If T meets T >=t0, the fortune of unit is carried out
Whether row load is in default load setting, i.e. Q1≤W≤Q2 judgement.
Preferably, judge the operating load of unit whether in default load setting, i.e. Q1≤W≤Q2；If W is unsatisfactory for Q1
≤ W≤Q2 then executes oil return on daytime mode, into conventional oil return；The operation of compressor is carried out if W meets Q1≤W≤Q2
Whether frequency is in predeterminated frequency section, the i.e. judgement of f1 < F≤f2.
Preferably, judge the running frequency for carrying out compressor whether in predeterminated frequency section, i.e. f1 < F≤f2；If F is not
Meet f1 < F≤f2, then execute oil return on daytime mode, into conventional oil return；If compressor operating frequency meet f1 < F≤
Whether less than 1, i.e., f2 then carries out the outdoor environment temperature of air-conditioning operation on daytime and the outdoor environment temperature ratio of night operation
The judgement of T1/T2 < 1.
Preferably, judge the outdoor environment temperature ratio that runs with night of outdoor environment temperature of operation on air-conditioning daytime i.e.
Whether T1/T2 is less than 1；If T1/T2 is unsatisfactory for T1/T2 < 1, oil return on daytime mode is executed, into conventional oil return；If
T1/T2 meets T1/T2 < 1, then carries out the set temperature of air-conditioning operation on daytime and the difference of indoor environment temperature and air-conditioning night
The ratio of the difference of the set temperature and indoor environment temperature of operation is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night<'s 1
Judgement.
Preferably, judge what the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and air-conditioning night were run
Whether the ratio of set temperature and the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；If
(T sets-T ring)Daytime/ (T sets-T ring)NightIt is unsatisfactory for (T sets-T ring)Daytime/ (T sets-T ring) night < 1, then execute oil return on daytime mode,
Into conventional oil return；(if T sets-T ring)Daytime/ (T sets-T ring)NightMeet (T sets-T ring)Daytime/ (T sets-T ring)Night< 1, then execute
Night oil return mode, into Intelligent noise reduction oil return.
Preferably, continue to start a new wheel logic judgment, the monitoring of one step of any of them after night oil return mode
It as a result is when being unsatisfactory for, then to be exited by Intelligent noise reduction oil return and execute oil return on daytime.
A kind of above-mentioned multi-connected machine method for controlling oil return can specifically be optimized for following steps progress:
S1: air-conditioning booting；
S2: judge whether the continuous operating time T of compressor is more than or equal to preset value t0；
S21: if it is not, then oil return on daytime mode is executed, into conventional oil return；
S22: judge in next step if so, entering；
S3: judge the operating load of unit whether in load setting, i.e. Q1≤W≤Q2；
S31: if it is not, then oil return on daytime mode is executed, into conventional oil return；
S32: judge in next step if so, entering；
S4: judge the running frequency of compressor whether in predeterminated frequency section, i.e. f1 < F≤f2；
S41: if it is not, then oil return on daytime mode is executed, into conventional oil return；
S42: judge in next step if so, entering；
S5: judge the outdoor environment temperature of operation on air-conditioning daytime and the outdoor environment temperature ratio i.e. T1/T2 of night operation
Whether less than 1, i.e. T1/T2 < 1；
S51: if it is not, then oil return on daytime mode is executed, into conventional oil return；
S52: judge in next step if so, entering；
S6: judge the setting of the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and the operation of air-conditioning night
Whether the ratio of temperature and the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；
S61: if it is not, then oil return on daytime mode is executed, into conventional oil return；
S62: if it is, night oil return mode is executed, into Intelligent noise reduction oil return.
S7: continue to start a new wheel logic judgment after Intelligent noise reduction oil return executes.
Preferably, the Intelligent noise reduction oil return mode of night oil return executes lower oil return frequency than oil return on daytime mode, such as
Night not oil return.
A kind of multi-gang air-conditioner is present embodiments provided, with a kind of multi-connected machine method for controlling oil return and step, such as Fig. 1
It is shown, there is oil return on daytime mode and night oil return mode both of which, open air-conditioning system, for example sky is opened by remote controler
Adjusting system makes it into normal working condition.And pass through operating load compressor frequency section, the outdoor temp at night and daytime
Difference and can be executed according to the set temperature of user's use habit and the difference of indoor environment temperature oil return on daytime mode and
Night oil return mode achievees the purpose that oil return night not oil return on daytime, can solve to avoid when unit is in the operation of night Smaller load
Because of the problem that difference variation indoor caused by frequent oil return is fast, comfort is deteriorated and power consumption is high.
To sum up, the present invention provides a kind of multi-connected machine method for controlling oil return and with its multi-gang air-conditioner.The multi-connected machine
Method for controlling oil return has oil return on daytime mode and night oil return mode both of which, and passes through the operating load of unit and compression
The use habit set temperature in unit frequency section, the outdoor temperature difference at night and daytime and user is held with the indoor temperature difference to distinguish
Row oil return on daytime mode and night oil return mode can solve small negative at night when unit to reduce later frequency and recirculating oil quantity
Indoor difference variation is too fast caused by lotus avoids when running because of frequent oil return, leads to the problem that comfort is deteriorated and power consumption is high,
User experience is improved, the risk complained after sale is reduced.
It is particularly shown and described the exemplary embodiment of the disclosure above.It should be appreciated that the present disclosure is not limited to
Detailed construction, set-up mode or implementation method described herein；On the contrary, disclosure intention covers included in appended claims
Various modifications and equivalence setting in spirit and scope.
Claims (10)
1. a kind of multi-connected machine method for controlling oil return, it is characterised in that: have two kinds of moulds of oil return on daytime mode and night oil return mode
Formula；
When only meeting following full terms, night oil return mode is just executed, otherwise executes oil return on daytime mode；
(1) continuous operating time of compressor is greater than preset value, i.e. T >=t0；
(2) operating load of unit is in default load setting, i.e. Q1≤W≤Q2；
(3) running frequency of compressor is in predeterminated frequency section, i.e. f1 < F≤f2；
(4) outdoor environment temperature of operation on air-conditioning daytime and the outdoor environment temperature ratio of night operation are less than 1, i.e. T1/T2 <
1；
(5) set temperature and room of the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and the operation of air-conditioning night
The ratio of the difference of interior environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1.
2. multi-connected machine method for controlling oil return as described in claim 1, it is characterised in that: after air-conditioning booting, first determine whether to compress
Whether the continuous operating time T of machine is more than or equal to preset value t0；If being unsatisfactory for T >=t0, oil return on daytime mode is executed；If
T meets T >=t0, then whether carries out the operating load of unit in default load setting, i.e. Q1≤W≤Q2 judgement.
3. multi-connected machine method for controlling oil return as claimed in claim 2, it is characterised in that: judge unit operating load whether
Default load setting, i.e. Q1≤W≤Q2；If W is unsatisfactory for Q1≤W≤Q2, oil return on daytime mode is executed；If W meets Q1
Whether≤W≤Q2 then carries out the running frequency of compressor in predeterminated frequency section, the i.e. judgement of f1 < F≤f2.
4. multi-connected machine method for controlling oil return as claimed in claim 3, it is characterised in that: judgement carries out the running frequency of compressor
Whether in predeterminated frequency section, i.e. f1 < F≤f2；If F is unsatisfactory for f1 < F≤f2, oil return on daytime mode is executed；If pressure
Contracting machine running frequency meets f1 < F≤f2, then carries out the outdoor environment temperature of air-conditioning operation on daytime and the outdoor ring of night operation
Whether border temperature ratio is less than 1, i.e. the judgement of T1/T2 < 1.
5. multi-connected machine method for controlling oil return as claimed in claim 4, it is characterised in that: judge the outdoor ring of operation on air-conditioning daytime
Whether border temperature and outdoor environment temperature ratio, that is, T1/T2 of night operation are less than 1；If T1/T2 is unsatisfactory for T1/T2 < 1,
Execute oil return on daytime mode；If T1/T2 meets T1/T2 < 1, the set temperature and indoor environment of air-conditioning operation on daytime are carried out
The ratio of the difference of the set temperature and indoor environment temperature of the difference of temperature and the operation of air-conditioning night is less than 1, i.e., (T sets-T
Ring)Daytime/ (T sets-T ring)NightThe judgement of < 1.
6. multi-connected machine method for controlling oil return as claimed in claim 5, it is characterised in that: judge the setting temperature of operation on air-conditioning daytime
Whether the ratio of the difference of set temperature and indoor environment temperature that degree is run with the difference of indoor environment temperature and air-conditioning night
Less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；(if T sets-T ring)Daytime/ (T sets-T ring)NightIt is unsatisfactory for that (T sets-T
Ring)Daytime/ (T sets-T ring) night < 1, then execute oil return on daytime mode；(if T sets-T ring)Daytime/ (T sets-T ring)NightMeet (T
If-T ring)Daytime/ (T sets-T ring)Night< 1 then executes night oil return mode.
7. multi-connected machine method for controlling oil return as claimed in claim 6, it is characterised in that:
Continue to start a new wheel logic judgment after night oil return mode executes, one step monitoring result of any of them is not
When meeting, then oil return on daytime mode is executed.
8. a kind of multi-connected machine method for controlling oil return, characterized by the following steps:
S1: air-conditioning booting；
S2: judge whether the continuous operating time T of compressor is more than or equal to preset value t0；
S21: if it is not, then executing oil return on daytime mode；
S22: judge in next step if so, entering；
S3: judge the operating load of unit whether in load setting, i.e. Q1≤W≤Q2；
S31: if it is not, then executing oil return on daytime mode；
S32: judge in next step if so, entering；
S4: judge the running frequency of compressor whether in predeterminated frequency section, i.e. f1 < F≤f2；
S41: if it is not, then executing oil return on daytime mode；
S42: judge in next step if so, entering；
S5: judge air-conditioning daytime operation outdoor environment temperature and night operation outdoor environment temperature ratio i.e. T1/T2 whether
Less than 1, i.e. T1/T2 < 1；
S51: if it is not, then executing oil return on daytime mode；
S52: judge in next step if so, entering；
S6: judge the set temperature of the set temperature of operation on air-conditioning daytime and the difference of indoor environment temperature and the operation of air-conditioning night
Whether the ratio with the difference of indoor environment temperature is less than 1, i.e., (T sets-T ring)Daytime/ (T sets-T ring)Night< 1；
S61: if it is not, then executing oil return on daytime mode；
S62: if it is, executing night oil return mode；
S7: continue to start a new wheel logic judgment after night oil return mode executes.
The night oil return mode executes lower oil return frequency than oil return on daytime mode.
9. multi-connected machine method for controlling oil return as claimed in claim 8, it is characterised in that: the night oil return mode is intelligence drop
It makes an uproar oil return mode, the Intelligent noise reduction oil return mode night not oil return；Oil return on the daytime mode is conventional oil return.
10. a kind of multi-gang air-conditioner has the described in any item multi-connected machine method for controlling oil return of claim 1-11.
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| KR20000034277A (en) * | 1998-11-28 | 2000-06-15 | 구자홍 | Lubrication mode setting method for compressor of inverter refrigerator |
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Application publication date: 20191101 |