CN107388664A - The control method of oil return valve, control device and air-conditioning system in air-conditioning system - Google Patents
The control method of oil return valve, control device and air-conditioning system in air-conditioning system Download PDFInfo
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- CN107388664A CN107388664A CN201710703290.XA CN201710703290A CN107388664A CN 107388664 A CN107388664 A CN 107388664A CN 201710703290 A CN201710703290 A CN 201710703290A CN 107388664 A CN107388664 A CN 107388664A
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- Prior art keywords
- oil return
- return valve
- air
- conditioning system
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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
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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
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/37—Capillary tubes
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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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 discloses control method, control device and the air-conditioning system of oil return valve in a kind of air-conditioning system, wherein, air-conditioning system includes multiple compressors, oil eliminator, the exhaust outlet of each compressor is connected to oil eliminator, oil return valve is arranged between the gas returning port of oil eliminator and each compressor, and control method comprises the following steps：When the coolant quantity of air-conditioning system is in sufficient state, exhaust port temperatures during each compressor operating are obtained, and it is poor according to exhaust port temperatures maximum between the multiple compressors of exhaust port temperatures acquisition during each compressor operating；Judge whether the exhaust port temperatures difference of maximum is more than or equal to preset value；If maximum exhaust port temperatures difference is more than or equal to preset value, extend the time that oil return valve is opened every time.This method is adjusted according to the exhaust port temperatures difference between compressor to the opening time of oil return valve, and compressor can be avoided the situation of oil return deficiency occur, improves air-conditioning system reliability of operation.
Description
Technical field
It is the control method of oil return valve in more particularly to a kind of air-conditioning system, non-provisional the present invention relates to air-conditioning technical field
The control device of oil return valve and a kind of air-conditioning system in property computer-readable recording medium, a kind of air-conditioning system.
Background technology
For the air-conditioning system containing multiple compressors, oil return valve, oil return valve are contained between compressor and oil eliminator
Lubricating oil can return to compressor return air mouth from oil eliminator or oil container during opening, to ensure the lubrication of compressor.
For the air-conditioning system of no special temperature-sensitive or survey oil level component, periodically opened typically by control oil return valve
Open, ensure compressor timing oil return.But when air-conditioning system operates in worst cold case, or long-term Smaller load is run, often
The situation of low on fuel occurs, this may result in compressor can not normal work due to insufficient lubrication.
The content of the invention
It is contemplated that at least solves one of technical problem in correlation technique to a certain extent.Therefore, the present invention
First purpose is in a kind of control method of the oil return valve in air-conditioning system is proposed, this method is according to the exhaust outlet between compressor
Temperature difference is adjusted to the opening time of oil return valve, and compressor can be avoided the situation of oil return deficiency occur, improves air-conditioning system
System reliability of operation.
Second object of the present invention is to propose a kind of non-transitorycomputer readable storage medium.
Control dress of the third object of the present invention in the oil return valve in a kind of air-conditioning system is proposed.
Fourth object of the present invention is to propose a kind of air-conditioning system.
To reach above-mentioned purpose, first aspect present invention embodiment proposes a kind of controlling party of oil return valve in air-conditioning system
Air-conditioning system described in method includes multiple compressors, oil eliminator, and the exhaust outlet of each compressor is connected to the oil separation
Device, the oil return valve are arranged between the gas returning port of the oil eliminator and each compressor, and methods described includes following
Step：When the coolant quantity of the air-conditioning system is in sufficient state, exhaust outlet temperature during each compressor operating is obtained
Degree, and according to exhaust outlet temperature maximum between the multiple compressor of exhaust port temperatures acquisition during each compressor operating
Degree is poor；Judge whether the maximum exhaust port temperatures difference is more than or equal to preset value；If the maximum exhaust port temperatures are poor
More than or equal to preset value, then extend the time that the oil return valve is opened every time.
The control method of oil return valve in air-conditioning system according to embodiments of the present invention, filled when the coolant quantity of air-conditioning system is in
During sufficient state, exhaust port temperatures during each compressor operating are obtained, and according to exhaust port temperatures during each compressor operating
Obtain that maximum exhaust port temperatures between multiple compressors are poor, then judge maximum exhaust port temperatures difference whether be more than or equal to it is pre-
If value, if maximum exhaust port temperatures difference is more than or equal to preset value, extend the time that oil return valve is opened every time.Thus, may be used
To avoid compressor from the situation of oil return deficiency occur, air-conditioning system reliability of operation is improved.
In addition, the control method of oil return valve can also have such as in the air-conditioning system proposed according to the above embodiment of the present invention
Additional technical characteristic down：
According to one embodiment of present invention, if the maximum exhaust port temperatures difference is less than preset value, keep pre-
If when oil return valve described in ordered pair be controlled.
According to one embodiment of present invention, a cycle of the default sequential is to control the oil return valve to open the
After one time, the oil return valve is controlled to close for the second time, wherein, by increasing the very first time and/or reducing described the
Two times are to extend the time that the oil return valve is opened every time.
According to one embodiment of present invention, the preset value be 6-10 DEG C, the oil return valve extend every time unlatching when
Between be 2-10min.
To reach above-mentioned purpose, the second aspect of the present invention embodiment proposes a kind of computer-readable storage of non-transitory
Medium, computer program is stored thereon with, the program is realized when being executed by processor described in first aspect present invention embodiment
The control method of oil return valve in air-conditioning system.
The non-transitorycomputer readable storage medium of the embodiment of the present invention, when the coolant quantity of air-conditioning system is in sufficient shape
During state, exhaust port temperatures during each compressor operating are obtained, and obtain according to exhaust port temperatures during each compressor operating
Maximum exhaust port temperatures are poor between multiple compressors, then judge whether the exhaust port temperatures difference of maximum is more than or equal to and preset
Value, if maximum exhaust port temperatures difference is more than or equal to preset value, extend the time that oil return valve is opened every time, so as to keep away
Exempt from the situation that oil return deficiency occurs in compressor, improve air-conditioning system reliability of operation.
To reach above-mentioned purpose, the third aspect of the present invention embodiment proposes a kind of control of oil return valve in air-conditioning system
Device, the air-conditioning system include multiple compressors, oil eliminator, and the exhaust outlet of each compressor is connected to the oil
From device, the oil return valve is arranged between the gas returning port of the oil eliminator and each compressor, the control device bag
Include：Acquisition module, during for obtaining each compressor operating when the coolant quantity of the air-conditioning system is in sufficient state
Exhaust port temperatures, and obtained according to exhaust port temperatures during each compressor operating maximum between the multiple compressor
Exhaust port temperatures it is poor；Judge module, for judging whether the maximum exhaust port temperatures difference is more than or equal to preset value；Control
Module, for extend that the oil return valve opens every time when the maximum exhaust port temperatures difference is more than or equal to preset value when
Between.
The control device of oil return valve in air-conditioning system according to embodiments of the present invention, by acquisition module in air-conditioning system
Coolant quantity obtains exhaust port temperatures during each compressor operating when being in sufficient state, and according to during each compressor operating
Maximum exhaust port temperatures are poor between the multiple compressors of exhaust port temperatures acquisition, and then judge module judges maximum exhaust outlet temperature
Whether degree difference is more than or equal to preset value, and last control module extends back when the exhaust port temperatures difference of maximum is more than or equal to preset value
The time that fuel tap is opened every time.Thus, it is possible to avoid compressor from the situation of oil return deficiency occur, what raising air-conditioning system was run can
By property.
In addition, the control device of oil return valve can also have such as in the air-conditioning system proposed according to the above embodiment of the present invention
Additional technical characteristic down：
According to one embodiment of present invention, when the maximum exhaust port temperatures difference is less than preset value, the control
Oil return valve described in ordered pair is controlled when module is additionally operable to keep default.
According to one embodiment of present invention, a cycle of the default sequential is to control the oil return valve to open the
After one time, control the oil return valve to close for the second time, wherein, the control module by increase the very first time and/
Or second time is reduced to extend the time that the oil return valve is opened every time.
According to one embodiment of present invention, the preset value be 6-10 DEG C, the oil return valve extend every time unlatching when
Between be 2-10min.
To reach above-mentioned purpose, fourth aspect present invention embodiment proposes a kind of air-conditioning system, including the present invention the 3rd
The control device of oil return valve in air-conditioning system described in aspect embodiment.
The air-conditioning system of the embodiment of the present invention, can basis by the control device of oil return valve in above-mentioned air-conditioning system
Exhaust port temperatures difference between compressor is adjusted to the opening time of oil return valve, so as to avoid compressor from oil return occur
The situation of deficiency, improve reliability of operation.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and it is readily appreciated that, wherein,
Fig. 1 is the control method of oil return valve in air-conditioning system according to an embodiment of the invention；
Fig. 2 is the schematic diagram of air-conditioning system according to an embodiment of the invention；
Fig. 3 is the control method of oil return valve in air-conditioning system in accordance with another embodiment of the present invention；
Fig. 4 is the schematic diagram of default sequential according to an embodiment of the invention；And
Fig. 5 is the block diagram of the control device of oil return valve in air-conditioning system according to an embodiment of the invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
The control method of oil return valve in the air-conditioning system proposed according to embodiments of the present invention, non-described with reference to the accompanying drawings
The control device and air-conditioning system of oil return valve in provisional computer-readable recording medium, air-conditioning system.
Fig. 1 is the control method of oil return valve in air-conditioning system according to an embodiment of the invention.Wherein, as shown in Fig. 2
Air-conditioning system includes multiple compressors (in Fig. 2 so that compressor is 2 as an example), oil eliminator, and the exhaust outlet of each compressor connects
Oil eliminator is connected to, oil return valve is arranged between the gas returning port of oil eliminator and each compressor；As shown in figure 1, control method
Comprise the following steps：
S1, when the coolant quantity of air-conditioning system is in sufficient state, exhaust port temperatures during each compressor operating are obtained,
And according to exhaust port temperatures difference Δ Tp_ maximum between the multiple compressors of exhaust port temperatures acquisition during each compressor operating
max。
Specifically, it can judge whether the coolant quantity of air-conditioning system is in sufficient shape according to the operational factor of air-conditioning system
State, wherein operational factor can be：Saturation temperature corresponding to the high pressure of outdoor unit modules, satisfy corresponding to the low pressure of outdoor unit modules
With the shell top temperature of temperature, the aperture of electric expansion valve and compressor or delivery temperature etc., specific determination methods are existing skill
Art, here is omitted.
S2, judges whether the exhaust port temperatures difference Δ Tp_max of maximum is more than or equal to preset value A.
S3, if maximum exhaust port temperatures difference Δ Tp_max is more than or equal to preset value A, extends oil return valve and open every time
Time.
Wherein, preset value A can be preset according to the discharge capacity of the compressor of air-conditioning system, it is preferred that preset value A can be with
For 6-10 DEG C.The time that oil return valve extends unlatching every time can be preset according to the discharge capacity of the compressor of air-conditioning system, preferably
, the time that oil return valve extends unlatching every time can be 2-10min.
Specifically, when air-conditioning system is run, the refrigerant state of air-conditioning system is obtained, and judges whether coolant quantity is sufficient,
If cold coal amount is in sufficient state, exhaust port temperatures during each compressor operating are obtained, and transport according to each compressor
Maximum exhaust port temperatures difference Δ Tp_max between the multiple compressors of exhaust port temperatures acquisition during row.Then judge whether
Δ Tp_max >=A, if Δ Tp_max >=A, illustrate bigger bias current situation be present between compressor, therefore, extend oil return
The time that valve is opened every time, to improve the recirculating oil quantity of system, ensure the refrigerant conveying capacity and oil lubrication situation of compressor, and
And the time that extension oil return valve is opened every time is equivalent to the part exhaust for having bypassed compressor and the tonifying Qi for adding return-air
Amount, the delivery temperature being also beneficial between equalizing compressor.Thus, this method is right according to the exhaust port temperatures difference between compressor
The opening time of oil return valve is adjusted, and compressor can be avoided the situation of oil return deficiency occur, improves air-conditioning system operation
Reliability.
According to one embodiment of present invention, as shown in figure 3, the control method of oil return valve may be used also in above-mentioned air-conditioning system
With including：
S4, if maximum exhaust port temperatures difference Δ Tp_max is less than preset value A, ordered pair oil return valve enters when keeping default
Row control.
Wherein in an embodiment of the present invention, as shown in figure 4, a cycle of default sequential is, control oil return valve is opened
After very first time t_on, control oil return valve closes the second time t_off.Wherein, by increasing very first time t_on and/or reduction
Second time t_off is to extend the time that oil return valve is opened every time.
That is, when the coolant quantity of air-conditioning system is in sufficient state, if Δ Tp_max ＜ A, control oil return
Valve is acted with the sequential shown in Fig. 4, wherein, ON represents oil return valve opening, and OFF represents oil return valve closing.And if Δ Tp_
Max >=A, then on the basis of default sequential, increase oil return valve opening time either reduce oil return valve shut-in time or
Increase the opening time of oil return valve simultaneously and reduce the shut-in time of oil return valve, to extend the time that oil return valve is opened every time, protect
Demonstrate,prove the recirculating oil quantity of compressor.
In summary, in air-conditioning system according to embodiments of the present invention oil return valve control method, it is cold when air-conditioning system
Matchmaker's amount is when being in sufficient state, obtain exhaust port temperatures during each compressor operating, and according to during each compressor operating
Maximum exhaust port temperatures are poor between the multiple compressors of exhaust port temperatures acquisition, whether then judge maximum exhaust port temperatures difference
More than or equal to preset value, if maximum exhaust port temperatures difference is more than or equal to preset value, extension oil return valve open every time when
Between.Thus, it is possible to avoid compressor from the situation of oil return deficiency occur, air-conditioning system reliability of operation is improved.
The embodiment of the present invention also proposes a kind of non-transitorycomputer readable storage medium, is stored thereon with computer journey
Sequence, the program realize the control method of oil return valve in above-mentioned air-conditioning system when being executed by processor.
The non-transitorycomputer readable storage medium of the embodiment of the present invention, when the coolant quantity of air-conditioning system is in sufficient shape
During state, exhaust port temperatures during each compressor operating are obtained, and obtain according to exhaust port temperatures during each compressor operating
Maximum exhaust port temperatures are poor between multiple compressors, then judge whether the exhaust port temperatures difference of maximum is more than or equal to and preset
Value, if maximum exhaust port temperatures difference is more than or equal to preset value, extend the time that oil return valve is opened every time, so as to keep away
Exempt from the situation that oil return deficiency occurs in compressor, improve air-conditioning system reliability of operation.
Fig. 5 is the block diagram of the control device of oil return valve in air-conditioning system according to an embodiment of the invention.Its
In, as shown in Fig. 2 air-conditioning system includes multiple compressors 1 (in Fig. 2 so that compressor is 2 as an example), oil eliminator 2, each pressure
The exhaust outlet of contracting machine 1 is connected to oil eliminator 2, and oil return valve 3 is arranged between the gas returning port of oil eliminator 2 and each compressor 1；
As shown in figure 5, control device includes：Acquisition module 10, judge module 20 and control module 30.
Wherein, acquisition module 10 is transported for obtaining each compressor 1 when the coolant quantity of air-conditioning system is in sufficient state
Exhaust port temperatures during row, and exhaust port temperatures when being run according to each compressor 1 obtain it is maximum between multiple compressors
Exhaust port temperatures difference Δ Tp_max.Judge module 20 is used to judge whether the exhaust port temperatures difference Δ Tp_max of maximum is more than or equal to
Preset value A.Control module 30 is used to extend oil return valve when the exhaust port temperatures difference Δ Tp_max of maximum is more than or equal to preset value A
3 times opened every time.
Specifically, as shown in Fig. 2 the compressor 1 of air-conditioning system, oil eliminator 2, oil return valve 3 and oil return capillary 4 successively
Connection forms circulation loop, and air-conditioning system can also include gas-liquid separator 5, four-way valve 6, outdoor condenser 7, electric expansion valve
8th, gas side stop valve 9, liquid side stop valve 10 etc., specific connected mode is shown in Fig. 2, and here is omitted.
Whether acquisition module 10 can judge the coolant quantity of air-conditioning system in abundance according to the operational factor of air-conditioning system
State, wherein operational factor can be：Saturation temperature corresponding to the high pressure of outdoor unit modules, corresponding to the low pressure of outdoor unit modules
The shell top temperature of saturation temperature, the aperture of electric expansion valve and compressor or delivery temperature etc., specific deterministic process are existing
Technology, here is omitted.
When air-conditioning system is run, acquisition module 10 obtains the refrigerant state of air-conditioning system, and is in abundance in cold coal amount
During state, exhaust port temperatures when obtaining exhaust port temperatures when each compressor 1 is run, and being run according to each compressor 1
Obtain maximum exhaust port temperatures difference Δ Tp_max between multiple compressors 1.Then judge module 20 judges whether Δ Tp_
Max >=A, if Δ Tp_max >=A, illustrate bigger bias current situation be present between compressor 1, therefore, control module 30 is prolonged
The time that long oil return valve is opened every time, to improve the recirculating oil quantity of system, ensure the refrigerant conveying capacity and oil lubrication feelings of compressor 1
Condition, also, extend the time opened every time of oil return valve 3 equivalent to the part exhaust for having bypassed compressor 1 and add return-air
Air compensation, the delivery temperature being also beneficial between equalizing compressor 1.Thus, the device is according to the exhaust outlet between compressor
Temperature difference is adjusted to the opening time of oil return valve, and compressor can be avoided the situation of oil return deficiency occur, improve air-conditioning
The reliability of system operation.
According to one embodiment of present invention, when the exhaust port temperatures difference Δ Tp_max of maximum is less than preset value A, control
Ordered pair oil return valve 3 is controlled when module 30 is additionally operable to keep default.
Wherein in an embodiment of the present invention, as shown in figure 4, a cycle of default sequential is, control oil return valve 3 is opened
After very first time t_on, control oil return valve 3 closes the second time t_off.Wherein, control module 30 is by increasing very first time t_
On and/or reduce by the second time t_off to extend the time that oil return valve 3 is opened every time.
That is, when the coolant quantity of air-conditioning system is in sufficient state, if it is determined that module 20 judges Δ Tp_max
＜ A, then control module 30 control oil return valve 3 acted with the sequential shown in Fig. 4, wherein, ON represents oil return valve 3 and opened, OFF
Oil return valve 3 is represented to close.And if it is determined that module 20 judges Δ Tp_max >=A, then control module 30 is on the basis of default sequential
On, when the opening time of increase oil return valve 3 either reduces the shut-in time of oil return valve 3 or increases the unlatching of oil return valve 3 simultaneously
Between and reduce oil return valve 3 shut-in time, to extend the time that oil return valve 3 is opened every time, ensure compressor 1 recirculating oil quantity.
In an embodiment of the present invention, preset value A can be preset according to the discharge capacity of the compressor 1 of air-conditioning system, excellent
Choosing, preset value A can be 6-10 DEG C.Oil return valve 3 extends the time opened every time can be according to the compressor 1 of air-conditioning system
Discharge capacity is preset, it is preferred that the time that oil return valve 3 extends unlatching every time can be 2-10min.
In summary, in air-conditioning system according to embodiments of the present invention oil return valve control device, existed by acquisition module
The coolant quantity of air-conditioning system obtains exhaust port temperatures during each compressor operating when being in sufficient state, and according to each compression
Maximum exhaust port temperatures are poor between the multiple compressors of exhaust port temperatures acquisition when machine is run, and then judge module judges maximum
Exhaust port temperatures difference whether be more than or equal to preset value, last control module is more than or equal to default in the exhaust port temperatures difference of maximum
Extend the time that oil return valve is opened every time during value.Thus, it is possible to avoid compressor from the situation of oil return deficiency occur, air-conditioning system is improved
System reliability of operation.
In addition, the embodiment of the present invention also proposes a kind of control of oil return valve in air-conditioning system, including above-mentioned air-conditioning system
Device.
The air-conditioning system of the embodiment of the present invention, can basis by the control device of oil return valve in above-mentioned air-conditioning system
Exhaust port temperatures difference between compressor is adjusted to the opening time of oil return valve, so as to avoid compressor from oil return occur
The situation of deficiency, improve reliability of operation.
In the description of the invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer ", " up time
The orientation or position relationship of the instruction such as pin ", " counterclockwise ", " axial direction ", " radial direction ", " circumference " be based on orientation shown in the drawings or
Position relationship, it is for only for ease of and describes the present invention and simplify description, rather than indicates or imply that signified device or element must
There must be specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect；Can be joined directly together, can also be indirectly connected by intermediary, can be in two elements
The connection in portion or the interaction relationship of two elements, limited unless otherwise clear and definite.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can be with "above" or "below" second feature
It is that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature are directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height and is less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the different embodiments or example and the feature of different embodiments or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. the control method of oil return valve in a kind of air-conditioning system, it is characterised in that the air-conditioning system includes multiple compressors, oil
Separator, the exhaust outlet of each compressor are connected to the oil eliminator, and the oil return valve is arranged on the oil eliminator
Between the gas returning port of each compressor, it the described method comprises the following steps：
When the coolant quantity of the air-conditioning system is in sufficient state, exhaust outlet temperature during each compressor operating is obtained
Degree, and according to exhaust outlet temperature maximum between the multiple compressor of exhaust port temperatures acquisition during each compressor operating
Degree is poor；
Judge whether the maximum exhaust port temperatures difference is more than or equal to preset value；
If the maximum exhaust port temperatures difference is more than or equal to preset value, extend the time that the oil return valve is opened every time.
2. the control method of oil return valve in air-conditioning system as claimed in claim 1, it is characterised in that if the maximum row
Gas port temperature difference is less than preset value, then oil return valve described in ordered pair is controlled when keeping default.
3. the control method of oil return valve in air-conditioning system as claimed in claim 2, it is characterised in that the one of the default sequential
The individual cycle is after controlling the oil return valve to open the very first time, to control the oil return valve to close for the second time, wherein, pass through increasing
Add the very first time and/or reduce second time to extend the time that the oil return valve is opened every time.
4. the control method of oil return valve in the air-conditioning system as any one of claim 1-3, it is characterised in that described pre-
If value is 6-10 DEG C, the time that the oil return valve extends unlatching every time is 2-10min.
5. a kind of non-transitorycomputer readable storage medium, is stored thereon with computer program, it is characterised in that the program quilt
The control method of oil return valve in the air-conditioning system as any one of claim 1-4 is realized during computing device.
6. the control device of oil return valve in a kind of air-conditioning system, it is characterised in that the air-conditioning system includes multiple compressors, oil
Separator, the exhaust outlet of each compressor are connected to the oil eliminator, and the oil return valve is arranged on the oil eliminator
Between the gas returning port of each compressor, the control device includes：
Acquisition module, during for obtaining each compressor operating when the coolant quantity of the air-conditioning system is in sufficient state
Exhaust port temperatures, and obtained according to exhaust port temperatures during each compressor operating maximum between the multiple compressor
Exhaust port temperatures it is poor；
Judge module, for judging whether the maximum exhaust port temperatures difference is more than or equal to preset value；
Control module, opened every time for extending the oil return valve when the maximum exhaust port temperatures difference is more than or equal to preset value
The time opened.
7. the control device of oil return valve in air-conditioning system as claimed in claim 6, it is characterised in that when the maximum exhaust
When mouth temperature difference is less than preset value, oil return valve described in ordered pair is controlled when the control module is additionally operable to keep default.
8. the control device of oil return valve in air-conditioning system as claimed in claim 7, it is characterised in that the one of the default sequential
The individual cycle is after controlling the oil return valve to open the very first time, to control the oil return valve to close for the second time, wherein, the control
Molding block by increase the very first time and/or reduce second time with extend that the oil return valve opens every time when
Between.
9. the control device of oil return valve in the air-conditioning system as any one of claim 6-8, it is characterised in that described pre-
If value is 6-10 DEG C, the time that the oil return valve extends unlatching every time is 2-10min.
10. a kind of air-conditioning system, it is characterised in that including oil return in the air-conditioning system as any one of claim 6-9
The control device of valve.
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| CN201710703290.XA CN107388664B (en) | 2017-08-16 | 2017-08-16 | The control method of oil return valve, control device and air-conditioning system in air-conditioning system |
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| CN201710703290.XA CN107388664B (en) | 2017-08-16 | 2017-08-16 | The control method of oil return valve, control device and air-conditioning system in air-conditioning system |
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Cited By (1)
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| CN111426040A (en) * | 2020-04-03 | 2020-07-17 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
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| CN107388664B (en) | 2019-12-03 |
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