CN109539649A - Unit method for controlling oil return, system and multi-connected machine - Google Patents
Unit method for controlling oil return, system and multi-connected machine Download PDFInfo
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- CN109539649A CN109539649A CN201811470428.7A CN201811470428A CN109539649A CN 109539649 A CN109539649 A CN 109539649A CN 201811470428 A CN201811470428 A CN 201811470428A CN 109539649 A CN109539649 A CN 109539649A
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/077—Compressor control units, e.g. terminal boxes, mounted on the compressor casing wall containing for example starter, protection switches or connector contacts
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of unit method for controlling oil return, system and multi-connected machines, wherein control method includes: the outside air temperature parameter obtained in following a period of time preset unit working time section；Total oil return time needed for obtaining unit during this period of time according to the outside air temperature parameter of acquisition；Before preset unit working time section starts, oil return mode is opened not less than total oil return time in advance.Such control method is according to the weather parameters in following a period of time, quantum chemical method goes out total oil return time required in preset unit working time section, to accurately determine oil return opportunity in advance, to open oil return mode in advance, ensure to forbid in the oil return period unit will not oil starvation preset, oil return or oil return number can not be reduced in preset unit working time section in this way, user is avoided continually to be bothered by oil returning noise using when or because oil return frequency excessively brings uncomfortable sensation.
Description
Technical field
The present invention relates to unit allocation technical field more particularly to a kind of unit method for controlling oil return, system and multi-connected machine.
Background technique
Unit oil return is to guarantee that compressor can be worked normally and be radiated, and oil return is bad to will lead to unit (compressor)
Abrasion is even burnt.Unit is under oil return mode, and compressor is run with highest frequency or close to highest frequency, refrigerant flow at high speed
When bring noise it is bigger.Moreover, most multi-joint unit, in oil return, no matter whether interior machine is in open state, all
The electric expansion valve of all interior machines is opened, it is therefore an objective to by pusher side, the interior machine to shut down in this way outside its internal accumulation refrigerant refunds
Also noise can be generated, influences user's rest or office, and the fluctuation of unit capacity can also bring to user and not relax when oil return
Suitable sense.
Most of current multi-joint machine equipment takes timing oil return to control, and such as pressure in 2 hours oil return 1 time, this oil return journey
Sequence is simple and reliable, but because different, the outdoor operating condition of unit working environment is changeable, the oil return under this mode is not accurate enough, cannot
Meet the work requirements of compressor well, it is also difficult to adapt to user to comfort increasingly higher demands.
Summary of the invention
The purpose of the present invention is to propose to a kind of unit method for controlling oil return, system and multi-connected machines, can be improved relaxing for user
Appropriateness experience.
According to an aspect of the invention, it is proposed that a kind of compressor oil return adjustment control method, comprising:
Obtain the outside air temperature parameter in following a period of time preset unit working time section；
Total oil return time needed for obtaining unit during this period of time according to the outside air temperature parameter of acquisition；
Before preset unit working time section starts, oil return mode is opened not less than total oil return time in advance.
Further, the step of obtaining the outside air temperature parameter in following a period of time preset unit working time section has
Body includes:
From the outside air temperature parameter obtained in weather forecast information in following a period of time preset unit working time section.
Further, total oil return time needed for obtaining unit during this period of time according to the outside air temperature parameter of acquisition
Step specifically includes:
The temperature on average in the period in each unit time is calculated according to the outside air temperature parameter of acquisition；
Calculate the temperature difference of the temperature on average and preset standard operating condition in each unit time；
Unit oil return time needed for each unit time is obtained according to corresponding temperature difference of each unit time；
The oil return time needed for each unit time is added up, obtain unit during this period of time needed for total oil return when
Between.
Further, when obtaining unit oil return needed for each unit time according to the temperature difference in each unit time
Between the step of specifically include:
Obtain unit oil return time needed for the unit time under standard condition；
According to temperature difference of the unit in the oil return time and unit time needed for the unit time under standard condition, obtain
Unit oil return time needed for each unit time out.
Further, in cooling mode, unit is being calculated in each unit according to the temperature difference in each unit time
Before the oil return time needed for time, further includes:
Judge whether the temperature difference in each unit time is more than or equal to preset temperature threshold, if it does, then calculating
By temperature difference multiplied by default oil return correction factor when the oil return time needed for the corresponding unit time, default oil return correction factor is greater than
1, otherwise directly calculated by temperature difference.
Further, the unit time presets, after preset unit working time section separates according to the unit time, if surplus
The remaining period is insufficient the unit time, then the oil return time needed for calculating remaining time section according to the unit time；Or
Unit time according to preset unit working time section determine, by preset unit working time section just according to
Unit time separates to calculate the required oil return time.
Further, preset unit working time section include at least two and interval setting, open oil return mode it
Before, control method further include:
Calculate the time interval between two neighboring preset unit working time section；
Total oil return time needed for judging the preset unit working time section of the latter whether be greater than with it is adjacent previous pre-
If unit working time section between time interval, if it is greater, then in adjacent previous preset unit working time section
Oil return is opened before.
According to another aspect of the invention, it is proposed that a kind of unit oil return control system, comprising:
Temperature parameter acquisition module, for obtaining the outside air temperature in following a period of time preset unit working time section
Parameter；
Oil return time computing module, needed for obtaining unit during this period of time for the outside air temperature parameter according to acquisition
Total oil return time；And
Oil return open control module, for being not less than total oil return in advance before preset unit working time section starts
Time opens oil return mode.
Further, temperature parameter acquisition module is GPS communication module, for obtaining future one from weather forecast information
Outside air temperature parameter in section time preset unit working time section.
Further, oil return time computing module includes:
Temperature on average computing module calculates each unit time in the period for the outside air temperature parameter according to acquisition
Interior temperature on average；
Temperature difference computing module, for calculating the temperature of the temperature on average in each unit time Yu preset standard operating condition
Difference；
Unit time oil return computing module, for obtaining unit in each list according to corresponding temperature difference of each unit time
The oil return time needed for the time of position；And
Oil return time accumulator module obtains unit at this for the oil return time needed for each unit time to add up
Between total oil return time required in section.
Further, oil return time computing module further include:
Standard condition oil return obtains module, for obtaining unit oil return time needed for the unit time under standard condition；
Wherein, unit time oil return computing module is used for according to when unit oil return needed for the unit time under standard condition
Between and unit time in temperature difference, obtain unit oil return time needed for each unit time.
Further, oil return time computing module further include:
Temperature difference judgment module, it is pre- whether the temperature difference for being judged in each unit time in cooling mode is more than or equal to
If temperature threshold；And
Oil return correction module, when being more than preset temperature threshold for the temperature difference within each unit time, to temperature difference
Multiplied by the default oil return correction factor for being greater than 1, with the oil return time needed for the calculating corresponding unit time.
Further, the unit time presets, after preset unit working time section separates according to the unit time, if surplus
The remaining period is insufficient the unit time, then unit time oil return computing module is calculated according to the unit time and returned needed for remaining time section
The oily time；Or
Unit time according to preset unit working time section determine, by preset unit working time section just according to
Unit time separates to calculate the required oil return time.
Further, preset unit working time section includes at least two and interval setting, control system further include:
Time interval computing module, for calculating the time interval between two neighboring preset unit working time section；
And
Oil return opportunity judgment module is for total oil return time needed for judging the preset unit working time section of the latter
The no time interval being greater than between adjacent previous preset unit working time section, and in the case where being greater than, make oil return
Open control module opens oil return mode before adjacent previous preset unit working time section.
In accordance with a further aspect of the present invention, a kind of multi-connected machine is proposed, the unit oil return control system including above-described embodiment.
Based on the above-mentioned technical proposal, the compressor oil return adjustment control method of the embodiment of the present invention, when according to one section of future
Interior weather parameters, quantum chemical method go out total oil return time required in preset unit working time section, so as to accurately true
Surely shift to an earlier date oil return opportunity, to open oil return mode in advance, make in machine set compressor and storage is well enough in advance in oil storage facility
Lubricating oil, it is ensured that it is preset forbid in the oil return period unit will not oil starvation, in this way in the preset unit working time
Section oil return or can not reduce oil return number, and user is avoided continually to be bothered by oil returning noise using when or because oil return frequency is excessive
Bring uncomfortable sensation.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the flow diagram of one embodiment of compressor oil return adjustment control method of the present invention；
Fig. 2 is the flow diagram of another embodiment of compressor oil return adjustment control method of the present invention；
Fig. 3 is the flow diagram of a specific embodiment of compressor oil return adjustment control method of the present invention；
Fig. 4 is the function composition schematic diagram of one embodiment of compressor oil return adjustment control system of the present invention.
Specific embodiment
The present invention described further below.In the following paragraphs, the different aspect of embodiment is defined in more detail.So
The various aspects of restriction can be combined with any other one aspect or many aspects, can not be combined unless explicitly stated otherwise.Especially,
It is considered as preferred or advantageous any feature can be considered as preferred or advantageous feature group with other one or more
It closes.
The terms descriptions merely for convenience such as " first " that occurs in the present invention, " second " have same names to distinguish
Different building blocks, be not offered as successively or primary-slave relation.
The present invention provides a kind of compressor oil return adjustment control methods, in a schematical embodiment, such as Fig. 1 institute
The flow chart shown, control method include:
Outside air temperature parameter in step 101, the following a period of time preset unit working time section of acquisition；
Step 102, obtained according to the outside air temperature parameter of acquisition unit during this period of time needed for total oil return time；
Step 103, before preset unit working time section starts, in advance not less than total oil return time open oil return mould
Formula.
Wherein, step 101~103 sequences execute.Preset unit working time section can be set by the user in step 101,
It can be set according to the work or rest habit of user, for example, setting daily 9:00~11:30,14:00~17:00 working；
Or set evening 22:00~next day 7:00 as time of having a rest of sleeping soundly etc., be not intended in these work or time of having a rest section due to
The oil return frequency generates noise too much, to improve environmental amenity.It can get following several hours, following a whole day or several days
Outside air temperature parameter.By the outside air temperature parameter being obtained ahead of time in unit working time section, the oil return of unit can be carried out
Pre-control.
In step 103, before preset unit working time section starts, total oil return time unlatching oil return can be shifted to an earlier date
Mode, in this way enter preset unit working time section when, just oil return finishes, can reduce the unit entire working time across
Degree；Or can also in advance be greater than total oil return time open oil return mode, with enter preset unit working time section when, energy
Ensure oil return abundance, enough to meet the recirculating oil quantity demand within preset unit working time section.
The control method of this embodiment of the invention goes out according to weather parameters in coming few hours, quantum chemical method in preset machine
Required total oil return time in group working time section, to accurately determine oil return opportunity in advance, to open oil return mould in advance
Formula makes to store good enough lubricating oil in machine set compressor and in oil storage facility in advance, it is ensured that forbid the oil return time preset
Section in unit will not oil starvation, in this way preset unit working time section can not oil return or reduce oil return number, avoid using
It is continually bothered by oil returning noise using when or because oil return frequency excessively brings uncomfortable sensation in family.Such control mode both solved
Oil return controls inaccurate problem, while solving the problems, such as work or in the time of having a rest unit oil return frequency is too many.
In some embodiments, step 101 obtains the outdoor gas in following a period of time preset unit working time section
Warm parameter specifically includes:
From the outside air temperature parameter obtained in weather forecast information in following a period of time preset unit working time section.
It in this embodiment, can be in GPS communication module built in unit, the weather forecast letter transmitted with directional reception
Breath, and temperature parameter is transferred to control unit.Point in following a period of time can be relatively accurately predicted due to weather forecast
When weather condition, from weather forecast information obtain outside air temperature parameter can simply, fast and accurately obtain preset unit
The corresponding outside air temperature parameter of working time section, outside air temperature parameter is accurately obtained by lower cost.
In some embodiments, flow chart as shown in Figure 2, step 102 obtain machine according to the outside air temperature parameter of acquisition
Total oil return time needed for organizing during this period of time specifically includes:
Step 201 calculates temperature on average in the period in each unit time according to the outside air temperature parameter of acquisition；
The temperature difference of step 202, the temperature on average in calculating each unit time and preset standard operating condition；
Step 203 obtains unit oil return needed for each unit time according to corresponding temperature difference of each unit time
Time；
Step 204 adds up the oil return time needed for each unit time, total needed for obtaining unit during this period of time
The oil return time.
Wherein, step 201~204 sequences execute.
In step 201, the unit time can set according to demand, such as half an hour, one hour or two hours, and calculate
Temperature on average Tour in subsequent preset unit working time section in each unit time, for example, when extracting today 9~10
Tour1=36 DEG C of time temperature on average, when 10~11 when Tour2=37 DEG C of temperature on average ...
In step 202, the temperature difference △ TC of the temperature on average and preset standard operating condition in each unit time is calculated.Meter
Calculate the temperature difference between temperature on average and preset standard operating condition per hour.When such as 9: △ TC1=36-35=1 DEG C；When 10: △ TC2
=37-35=2 DEG C ...
In step 203, it calculates unit and runs required oil return time touri, unit within each unit time
Min, the step is according to the outside air temperature of prediction and the temperature difference of unit preset standard operating condition as the control unit oil return time
Foundation, temperature difference is bigger, and the oil return time needed for unit is longer.Wherein, standard condition is a kind of test ginseng of unit listed by specification
Examine parameter, different regions slightly difference.It is compared herein for basic parameter.This value is factory setting value.For example, can be in refrigeration
35 DEG C of selection, when heating, select 7 DEG C.
In step 204, the oil return time needed for each unit time is added up, needed for obtaining unit during this period of time
Total oil return time.∑ tour=∑ tour1+ ∑ tour2+ ... ∑ touri+ ....
The embodiment reflects outside air temperature by the way that preset unit working time section is divided into multiple unit time
Change the influence for the oil return time needed for compressor, is accurately calculated with the outside air temperature according to prediction in preset unit
Required total oil return time in working time section avoids user from using time-frequency to accurately judge that out the opportunity of oil return in advance
It is bothered numerously by oil returning noise or because oil return frequency excessively brings uncomfortable sensation.
In some embodiments, flow chart as shown in Figure 3, step 203 are obtained according to the temperature difference in each unit time
Unit oil return time needed for each unit time specifically includes out:
Step 203A, unit oil return time needed for the unit time under preset standard operating condition is obtained；
Step 203B, according to unit in the oil return time and unit time needed for the unit time under standard condition
Temperature difference obtains unit oil return time needed for each unit time.
Wherein, step 203A and step 203B sequence execute.In step 203A, unit is under preset standard operating condition, fortune
The corresponding relationship of row time and required oil return time are unit development parameters, are the fitting unit institutes that developer is measured based on experiment
The parameter needed may be the same or different, no mandatory requirement for fixed value of dispatching from the factory in refrigeration and heating.It is closed according to the correspondence
System can obtain unit oil return time tb needed for the unit time under preset standard operating condition, if unit is run 2 hours, when needing oil return
Between 20min, then tb=10min.Unit can be calculated as a result, and required oil return time touri is run within each unit time,
Touri=tb+ △ TCi*1, wherein i indicates i-th of unit time in preset unit working time section.
In a upper embodiment, for example, if when calculating 9~10 periods in unit need oil return time ∑ Tour1=10+1
=11min；When 10~11 periods in unit need oil return time ∑ Tour2=10+2*1=12min；∑ tour=∑ Tour1+ ∑
Tour2=11+12=23min.Then unit, then need to be in 9:00 to guarantee unit not oil return in 9:00~11:00 working time
Preceding completion oil return 23min, that is to say, that unit will at least open oil return mode before 8:37.
In some embodiments, flow chart as shown in Figure 3, in cooling mode, when step 203 is according to each unit
Before interior temperature difference calculates unit oil return time needed for each unit time, control method of the invention further include:
Step 205 judges whether the temperature difference △ TCi in each unit time is more than or equal to preset temperature threshold T0, example
Such as 10 DEG C, if so, i.e. △ TCi >=T0, then it will when the oil return time needed for executing step 203B and calculating the corresponding unit time
Temperature difference presets oil return correction factor and is greater than 1, otherwise directly calculated by temperature difference multiplied by default oil return adjusted coefficient K.
If the embodiment considers that outdoor environment temperature is excessively high under refrigeration mode, it is existing that unit can have frequency reducing in oil return
As being thus modified to the unit time corresponding oil return time.Influence by outdoor environment temperature to compressor oil return frequency
It takes into account, can more accurately calculate required total oil return time in preset unit working time section.
By taking multi-connected machine as an example, multi-online air-conditioning system (refers generally to environment temperature at 43 ° or more, such as the Middle East in high-temperature refrigeration
Equal high temperature area) when, due to system pressure height, compressor exhaust temperature is also increased, when unit mostly can be long because of defencive function
Between run at low frequency, at this time pipeline, interior pusher side lubricating oil can be cumulative.
In addition, the oil return mode of air-conditioning is to pass through refrigerant when refrigeration mode, compressor are run with highest frequency mostly
Refrigerant in pipeline is brought back to compressor side by flow at high speed.But high pressure, high temperature can force mostly in adjoint pipe when high-temperature refrigeration
Self-protection is realized in unit frequency reducing, if frequency reducing amplitude is excessive, the oily ability of band is weak at low frequency for compressor, be can not achieve and is effectively returned
Oil is in oil return mode for a long time, influences indoor refrigeration effect；If the frequency reducing amplitude range of decrease is too small, high pressure, high temperature cannot in system
It is effectively reduced, unit may be caused unit to be in shutdown or frequency reducing for a long time, cannot achieve height by forced-stopping machine or frequency reducing again
Imitate oil return.It can be seen that the oil return time needed in high-temperature refrigeration can increase.
And this problem is then not present in a heating mode, the oil return needed for executing step 203B and calculating the corresponding unit time
It can directly be calculated by temperature difference when the time, without considering the size of temperature difference.
In the above embodiments, the unit time can at least be set by the following two kinds mode:
First, the unit time presets, after preset unit working time section separates according to the unit time, if when remaining
Between the section insufficient unit time, then the oil return time needed for calculating remaining time section according to the unit time.Such control mode is more
Simply, and after separation in the case where section deficiency unit time remaining time, surplus is reserved when total oil return time to calculate, really
Protect it is preset forbid in the oil return period unit will not oil starvation, allow in preset unit working time section not oil return,
The comfort level that user is improved in the important period is felt.
Second, the unit time determines according to preset unit working time section, preset unit working time section is proper
It is good that the required oil return time is calculated according to unit time separation.Such control mode can be according to the preset unit working time
Section neatly adjusts the unit time, more accurately to calculate total oil return time, can further adapt to can be used for oil return
Time less situation.
In some embodiments, preset unit working time section includes at least two and interval setting, is opening oil return
Before mode, control method further include:
Calculate the time interval T between two neighboring preset unit working time section；
Total oil return time T2 needed for judging the preset unit working time section of the latter whether be greater than with it is adjacent previous
Time interval T between preset unit working time section, if it is greater, then in the adjacent previous preset unit working time
Oil return mode is opened before section；Otherwise oil return mode can be opened between two neighboring preset unit working time section, it can also
Oil return mode is opened before adjacent previous preset unit working time section.
More preferably, if T2 > T, can at the T1+T2 moment before adjacent previous preset unit working time section, or
Oil return mode is opened at the time of earlier.
The embodiment can be when presetting multiple working time sections, if prejudged when a preset unit works
Between oil return again after the completion of section, if the oil return demand that can satisfy next preset unit working time section each will be preset
Unit working time section overall planning, can the not oil return in preset unit working time section, quilt when user being avoided to use
Oil returning noise bothers or because oil return frequency excessively brings uncomfortable sensation.
Further, flow chart as shown in Figure 3, control method of the invention further include:
Step 100, setting unit working time section.User can change the period of setting at any time, for working or stopping
Time relatively fixed user is ceased, can be set daily, can also carry out once setting and prestore in the unit.
Secondly, the present invention also provides a kind of unit oil return control systems, in some embodiments, as shown in figure 4, such
Control system includes:
Temperature parameter acquisition module 10, for obtaining the outdoor gas in following a period of time preset unit working time section
Warm parameter；
Oil return time computing module 20, needed for obtaining unit during this period of time for the outside air temperature parameter according to acquisition
Total oil return time；And
Oil return open control module 30, for being returned in advance not less than total before preset unit working time section starts
The oily time opens oil return mode.
Such control system can go out according to the weather parameters in following a period of time, quantum chemical method in preset unit work
Make total oil return time required in the period, to accurately determine oil return opportunity in advance, to open oil return mode in advance, really
Protect it is preset forbid in the oil return period unit will not oil starvation, in this way preset unit working time section can not oil return
Or oil return number is reduced, avoid user from continually being bothered by oil returning noise using when or because oil return frequency excessively brings discomfort
Feel.
In some embodiments, temperature parameter acquisition module 10 is GPS communication module, for obtaining from weather forecast information
Take the outside air temperature parameter in following a period of time preset unit working time section.GPS communication module can be passed with directional reception
The defeated weather forecast information to come, and temperature parameter therein is transferred to oil return time computing module.
The timesharing weather condition in following a period of time can be relatively accurately predicted due to weather forecast, believed from weather forecast
Outside air temperature parameter is obtained in breath can simply, fast and accurately obtain the corresponding outdoor gas of preset unit working time section
Warm parameter accurately obtains outside air temperature parameter by lower cost.
In some embodiments, oil return time computing module 20 includes:
Temperature on average computing module calculates each unit time in the period for the outside air temperature parameter according to acquisition
Interior temperature on average；
Temperature difference computing module, for calculating the temperature of the temperature on average in each unit time Yu preset standard operating condition
Difference；
Unit time oil return computing module, for obtaining unit in each list according to corresponding temperature difference of each unit time
The oil return time needed for the time of position；And
Oil return time accumulator module obtains unit at this for the oil return time needed for each unit time to add up
Between total oil return time required in section.
The embodiment reflects outside air temperature by the way that preset unit working time section is divided into multiple unit time
Change the influence for the oil return time needed for compressor, is accurately calculated with the outside air temperature according to prediction in preset unit
Required total oil return time in working time section avoids user from using time-frequency to accurately judge that out the opportunity of oil return in advance
It is bothered numerously by oil returning noise or because oil return frequency excessively brings uncomfortable sensation.
Further, oil return time computing module 20 may also include that
Standard condition oil return obtains module, for obtaining unit under preset standard operating condition when oil return needed for the unit time
Between；
Wherein, unit time oil return computing module is used for according to when unit oil return needed for the unit time under standard condition
Between and unit time in temperature difference, obtain unit oil return time needed for each unit time.
In some embodiments, oil return time computing module 20 may also include that
Temperature difference judgment module, it is pre- whether the temperature difference for being judged in each unit time in cooling mode is more than or equal to
If temperature threshold；And
Oil return correction module, when being more than preset temperature threshold for the temperature difference within each unit time, to temperature difference
Multiplied by the default oil return correction factor for being greater than 1, with the oil return time needed for the calculating corresponding unit time.
If the embodiment considers that outdoor environment temperature is excessively high under refrigeration mode, it is existing that unit can have frequency reducing in oil return
As being thus modified to the unit time corresponding oil return time.Influence by outdoor environment temperature to compressor oil return frequency
It takes into account, can more accurately calculate required total oil return time in preset unit working time section.
For in above-described embodiment, two kinds of methods of determination are can be used in the unit time:
First, the unit time presets, after preset unit working time section separates according to the unit time, if when remaining
Between the section insufficient unit time, then when oil return needed for unit time oil return computing module calculates remaining time section according to the unit time
Between.
Second, the unit time determines according to preset unit working time section, preset unit working time section is proper
It is good that the required oil return time is calculated according to unit time separation.
In some embodiments, preset unit working time section includes at least two and interval setting, and control system is also
Include:
Time interval computing module, for calculating the time interval between two neighboring preset unit working time section；
And
Oil return opportunity judgment module is for total oil return time needed for judging the preset unit working time section of the latter
The no time interval being greater than between adjacent previous preset unit working time section, and in the case where being greater than, make oil return
Open control module opens oil return mode before adjacent previous preset unit working time section.
Finally, the present invention also provides a kind of multi-connected machine, the unit oil return control system including above-described embodiment.Due to multi-joint
For machine in oil return, no matter whether interior machine is in open state, will open the electric expansion valve of all interior machines, inside it
Accumulate the outer pusher side of refrigerant refunds, each interior machine can also generate biggish noise after shut down in this way, therefore unit removes normal control
Except, the oil return control mode based on weather forecasting is also used, so that the oil return time is staggered with the unit working time,
To improve the comfort level experience of user.
A kind of unit method for controlling oil return provided by the present invention, system and multi-connected machine are described in detail above.
Principle and implementation of the present invention are described for specific embodiment used herein, and the explanation of above embodiments is only
It is to be used to help understand method and its core concept of the invention.It should be pointed out that for those skilled in the art
For, it without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention, these improve and repair
Decorations are also fallen within the protection scope of the claims of the present invention.
Claims (15)
1. a kind of compressor oil return adjustment control method characterized by comprising
Obtain the outside air temperature parameter in following a period of time preset unit working time section；
Total oil return time needed for obtaining unit during this period of time according to the outside air temperature parameter of acquisition；
Before preset unit working time section starts, oil return mode is opened not less than total oil return time in advance.
2. compressor oil return adjustment control method according to claim 1, which is characterized in that it is pre- to obtain following a period of time
If unit working time section in outside air temperature parameter the step of specifically include:
From the outside air temperature parameter obtained in weather forecast information in following a period of time preset unit working time section.
3. compressor oil return adjustment control method according to claim 1, which is characterized in that according to the outside air temperature of acquisition
Parameter obtain unit during this period of time needed for total oil return time the step of specifically include:
The temperature on average in the period in each unit time is calculated according to the outside air temperature parameter of acquisition；
Calculate the temperature difference of the temperature on average and preset standard operating condition in each unit time；
Unit oil return time needed for each unit time is obtained according to corresponding temperature difference of each unit time；
The oil return time needed for each unit time is added up, total oil return time needed for obtaining unit during this period of time.
4. compressor oil return adjustment control method according to claim 3, which is characterized in that according in each unit time
Temperature difference show that unit specifically includes the step of the oil return time needed for each unit time:
Obtain unit oil return time needed for the unit time under the preset standard operating condition；
According to oil return time needed for unit unit time under the preset standard operating condition and the temperature in unit time
Difference obtains unit oil return time needed for each unit time.
5. compressor oil return adjustment control method according to claim 3, which is characterized in that in cooling mode, in root
Before temperature difference calculating unit oil return time needed for each unit time in each unit time, further includes:
Judge whether the temperature difference in each unit time is more than or equal to preset temperature threshold, if it does, then calculating correspondence
Needed for unit time when the oil return time by the temperature difference multiplied by default oil return correction factor, the default oil return correction factor
Greater than 1, otherwise directly calculated by the temperature difference.
6. compressor oil return adjustment control method according to claim 3, which is characterized in that the unit time sets in advance
It is fixed, after the preset unit working time section separates according to the unit time, if the remaining time section insufficient unit time,
The oil return time needed for calculating remaining time section according to the unit time；Or
The unit time determines according to the preset unit working time section, and preset unit working time section is lucky
Separate according to the unit time to calculate the required oil return time.
7. compressor oil return adjustment control method according to claim 3, which is characterized in that the preset unit work
Period includes at least two and interval setting, before opening oil return mode, the control method further include:
Calculate the time interval between the two neighboring preset unit working time section；
Total oil return time needed for judging the preset unit working time section of the latter whether be greater than with it is adjacent previous preset
Time interval between unit working time section, if it is greater, then before adjacent previous preset unit working time section
Open oil return mode.
8. a kind of unit oil return control system characterized by comprising
Temperature parameter acquisition module (10), for obtaining the outside air temperature in following a period of time preset unit working time section
Parameter；
Oil return time computing module (20), needed for obtaining unit during this period of time for the outside air temperature parameter according to acquisition
Total oil return time；And
Oil return open control module (30), it is described total for being not less than before preset unit working time section starts in advance
The oil return time opens oil return mode.
9. unit oil return control system according to claim 8, which is characterized in that the temperature parameter acquisition module (10)
For GPS communication module, for from the room obtained in weather forecast information in following a period of time preset unit working time section
Outer temperature parameter.
10. unit oil return control system according to claim 8, which is characterized in that the oil return time computing module
(20) include:
Temperature on average computing module calculates in the period in each unit time for the outside air temperature parameter according to acquisition
Temperature on average；
Temperature difference computing module, for calculating the temperature difference of the temperature on average in each unit time Yu preset standard operating condition；
Unit time oil return computing module, for obtaining unit in each unit according to corresponding temperature difference of each unit time
Between needed for the oil return time；And
Oil return time accumulator module obtains unit in the period for the oil return time needed for each unit time to add up
Interior required total oil return time.
11. unit oil return control system according to claim 10, which is characterized in that the oil return time computing module
(20) further include:
Standard condition oil return obtains module, for obtaining unit under the preset standard operating condition when oil return needed for the unit time
Between；
Wherein, the unit time oil return computing module was used for according to needed for unit unit time under the preset standard operating condition
The oil return time and unit time in temperature difference, obtain unit oil return time needed for each unit time.
12. unit oil return control system according to claim 10, which is characterized in that the oil return time computing module
(20) further include:
Whether temperature difference judgment module, the temperature difference for being judged in each unit time in cooling mode are more than or equal to default temperature
Spend threshold value；And
Oil return correction module, when being more than preset temperature threshold for the temperature difference within each unit time, to the temperature difference
Multiplied by the default oil return correction factor for being greater than 1, with the oil return time needed for the calculating corresponding unit time.
13. unit oil return control system according to claim 10, which is characterized in that the unit time presets,
After the preset unit working time section separates according to the unit time, if remaining time section insufficient unit time, institute
State the oil return time needed for unit time oil return computing module calculates remaining time section according to the unit time；Or
The unit time determines according to the preset unit working time section, and preset unit working time section is lucky
Separate according to the unit time to calculate the required oil return time.
14. unit oil return control system according to claim 10, which is characterized in that the preset unit working time
Section includes at least two and interval setting, the control system further include:
Time interval computing module, for calculating the time interval between the two neighboring preset unit working time section；
And
Whether oil return opportunity judgment module is big for total oil return time needed for judging the preset unit working time section of the latter
Time interval between adjacent previous preset unit working time section, and in the case where being greater than, make the oil return
Open control module (30) opens oil return mode before adjacent previous preset unit working time section.
15. a kind of multi-connected machine, which is characterized in that including any unit oil return control system of claim 8~14.
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| CN111023416A (en) * | 2019-12-24 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Oil return control method and device and multi-split air conditioner |
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