CN107388664B - 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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- CN107388664B CN107388664B CN201710703290.XA CN201710703290A CN107388664B CN 107388664 B CN107388664 B CN 107388664B CN 201710703290 A CN201710703290 A CN 201710703290A CN 107388664 B CN107388664 B CN 107388664B
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- oil return
- return valve
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- 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
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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
- 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
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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
- 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 systems 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 oil eliminator and the gas returning port of each compressor, control method is the following steps are included: when the coolant quantity of air-conditioning system is in sufficient state, it is poor that exhaust port temperatures when obtaining the exhaust port temperatures when operation of each compressor, and being run according to each compressor obtain maximum exhaust port temperatures between multiple compressors；Judge whether maximum exhaust port temperatures difference 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 the opening time of oil return valve according to the exhaust port temperatures difference between compressor, can occur the situation of oil return deficiency to avoid compressor, improves air-conditioning system reliability of operation.
Description
Technical field
It is the present invention relates to air-conditioning technical field, in particular to the control method of oil return valve in a kind of air-conditioning system, non-provisional
The control device of oil return valve and a kind of air-conditioning system in property computer readable storage medium, a kind of air-conditioning system.
Background technique
For containing the air-conditioning system of 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 when opening, to guarantee the lubrication of compressor.
For the air-conditioning system of no special temperature-sensitive or survey oil level component, usually periodically opened by controlling oil return valve
It opens, guarantees compressor timing oil return.However when air-conditioning system operates in worst cold case, or long-term Smaller load is run, often
The case where will appear low on fuel, this may result in compressor and can not work normally due to insufficient lubrication.
Summary of the invention
The present invention is directed to solve at least some of the technical problems in related technologies.For this purpose, of the invention
First purpose is to propose a kind of control method of oil return valve in air-conditioning system, and this method is according to the exhaust outlet between compressor
Temperature difference is adjusted the opening time of oil return valve, can occur the situation of oil return deficiency to avoid compressor, 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.
Third object of the present invention is to propose a kind of control dress of oil return valve in air-conditioning system.
Fourth object of the present invention is to propose a kind of air-conditioning system.
In order to achieve the above objectives, 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 oil eliminator and the gas returning port of each compressor, and the method includes following
Step: when the coolant quantity of the air-conditioning system is in sufficient state, the exhaust outlet temperature when operation of each compressor is obtained
Exhaust port temperatures when spending, and being run according to each compressor obtain maximum exhaust outlet temperature between the multiple compressor
It is poor to spend；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 an embodiment of the present invention is filled when the coolant quantity of air-conditioning system is in
Exhaust port temperatures when sufficient state, when obtaining the exhaust port temperatures when operation of each compressor, and being run according to each compressor
It is poor to obtain maximum exhaust port temperatures between multiple compressors, it is pre- then to judge whether maximum exhaust port temperatures difference is more than or equal to
If value extends the time that oil return valve is opened every time if maximum exhaust port temperatures difference is more than or equal to preset value.As a result, may be used
Occur the situation of oil return deficiency to avoid compressor, improves air-conditioning system reliability of operation.
In addition, in the air-conditioning system proposed according to that above embodiment of the present invention the control method of oil return valve can also have as
Under additional technical characteristic:
According to one embodiment of present invention, if the maximum exhaust port temperatures difference is less than preset value, keep pre-
If when ordered pair described in oil return valve controlled.
According to one embodiment of present invention, a cycle of the default timing is to control the oil return valve to open the
It after one time, controls the oil return valve and closed for the second time, wherein by increasing the 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.
In order to achieve the above objectives, the second aspect of the present invention embodiment proposes a kind of computer-readable storage of non-transitory
Medium is stored thereon with computer program, realizes described in first aspect present invention embodiment when which is executed by processor
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
When state, exhaust port temperatures when obtaining the exhaust port temperatures when operation of each compressor, and being run according to each compressor are obtained
Maximum exhaust port temperatures are poor between multiple compressors, and it is default then to judge whether maximum exhaust port temperatures difference is more than or equal to
Value extends the time that oil return valve is opened every time, if maximum exhaust port temperatures difference is more than or equal to preset value so as to keep away
Exempt from the situation that oil return deficiency occurs in compressor, improves air-conditioning system reliability of operation.
In order to achieve the above objectives, 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 oil eliminator and the gas returning port of each compressor, the control device packet
It includes: obtaining module, when obtaining the operation of each compressor when being in sufficient state for the coolant quantity in the air-conditioning system
Exhaust port temperatures, and exhaust port temperatures when being run according to each compressor obtain it is maximum between the multiple compressor
Exhaust port temperatures it is poor；Judgment 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 an embodiment of the present invention, by obtaining module in air-conditioning system
When obtaining the exhaust port temperatures when operation of each compressor when coolant quantity is in sufficient state, and being run according to each compressor
Maximum exhaust port temperatures are poor between the multiple compressors of exhaust port temperatures acquisition, and then judgment module judges maximum exhaust outlet temperature
Whether degree difference is more than or equal to preset value, and last control module extends back when maximum exhaust port temperatures difference is more than or equal to preset value
The time that oil valve is opened every time.Thus, it is possible to which compressor is avoided the situation of oil return deficiency occur, what raising air-conditioning system was run can
By property.
In addition, in the air-conditioning system proposed according to that above embodiment of the present invention the control device of oil return valve can also have as
Under additional technical characteristic:
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 also used to keep default.
According to one embodiment of present invention, a cycle of the default timing is to control the oil return valve to open the
After one time, control the oil return valve and closed for the second time, wherein the control module by increase the 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.
In order to achieve the above objectives, fourth aspect present invention embodiment proposes a kind of air-conditioning system, including third of the present invention
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 the opening time of oil return valve, so as to avoid compressor from oil return occur
Insufficient situation improves reliability of operation.
Detailed description of the invention
Above-mentioned and/or additional aspect and advantage of the invention will become from the following description of the accompanying drawings of embodiments
Obviously 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 timing 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.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain 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 storage 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 by taking compressor is 2 as an example), oil eliminator, and the exhaust outlet of each compressor connects
It is connected to oil eliminator, oil return valve is arranged between oil eliminator and the gas returning port of each compressor；As shown in Figure 1, control method
The following steps are included:
S1 obtains the exhaust port temperatures when operation of each compressor when the coolant quantity of air-conditioning system is in sufficient state,
And exhaust port temperatures when being run according to each compressor obtain maximum exhaust port temperatures difference Δ Tp_ between multiple compressors
max。
Specifically, it can judge whether the coolant quantity of air-conditioning system is in sufficient shape according to the operating parameter of air-conditioning system
State, wherein operating parameter can be with are as follows: the corresponding saturation temperature of the high pressure of outdoor unit modules, the low pressure of outdoor unit modules are corresponding full
With the shell top temperature of temperature, the aperture of electric expansion valve and compressor or delivery temperature etc., specific judgment method is existing skill
Art, details are not described herein again.
S2, judges whether maximum exhaust port temperatures difference Δ Tp_max is more than or equal to preset value A.
S3 extends oil return valve and opens every time if maximum exhaust port temperatures difference Δ Tp_max is more than or equal to preset value A
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
It is 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 judge whether coolant quantity is sufficient,
If cold coal amount is in sufficient state, the exhaust port temperatures when operation of each compressor are obtained, and transport according to each compressor
Exhaust port temperatures when row obtain maximum exhaust port temperatures difference Δ Tp_max between multiple compressors.Then it judges whether there is
Δ Tp_max >=A illustrates that there are bigger bias current situations between compressor if Δ Tp_max >=A, therefore, extends oil return
The time that valve is opened every time guarantees the refrigerant conveying capacity and oil lubrication situation of compressor to improve the recirculating oil quantity of system, and
And the time that extension oil return valve is opened every time is equivalent to a part exhaust for having bypassed compressor and the tonifying Qi for increasing return-air
Amount, the delivery temperature being also beneficial between equalizing compressor.This method is right according to the exhaust port temperatures difference between compressor as a result,
The opening time of oil return valve is adjusted, and can occur the situation of oil return deficiency to avoid compressor, 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
To include:
S4, if maximum exhaust port temperatures difference Δ Tp_max is less than preset value A, when keeping default ordered pair oil return valve into
Row control.
Wherein in an embodiment of the present invention, as shown in figure 4, a cycle of default timing is, control oil return valve is opened
After first time t_on, control oil return valve closes the second time t_off.Wherein, by increasing 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, controls oil return
Valve is acted with timing 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 timing, increase oil return valve opening time perhaps 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, protects
Demonstrate,prove the recirculating oil quantity of compressor.
In conclusion in air-conditioning system according to an embodiment of the present invention oil return valve control method, it is cold when air-conditioning system
When matchmaker's amount is in sufficient state, when obtaining the exhaust port temperatures when operation of each compressor, and being run according to each compressor
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, extend that oil return valve opens every time when
Between.Thus, it is possible to which compressor is avoided 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
When state, exhaust port temperatures when obtaining the exhaust port temperatures when operation of each compressor, and being run according to each compressor are obtained
Maximum exhaust port temperatures are poor between multiple compressors, and it is default then to judge whether maximum exhaust port temperatures difference is more than or equal to
Value extends the time that oil return valve is opened every time, if maximum exhaust port temperatures difference is more than or equal to preset value so as to keep away
Exempt from the situation that oil return deficiency occurs in compressor, improves 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 by taking 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 oil eliminator 2 and the gas returning port of each compressor 1；
As shown in figure 5, control device includes: to obtain module 10, judgment module 20 and control module 30.
Wherein, it obtains module 10 and is used to obtain each fortune of compressor 1 when the coolant quantity of air-conditioning system is in sufficient state
Exhaust port temperatures when 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.Judgment module 20 is for judging whether maximum exhaust port temperatures difference Δ Tp_max is more than or equal to
Preset value A.Control module 30 is used to extend oil return valve when maximum exhaust port temperatures difference Δ Tp_max 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
8, gas side shut-off valve 9, liquid side shut-off valve 10 etc., specific connection type is shown in Fig. 2, and details are not described herein again.
Obtaining module 10 can judge whether the coolant quantity of air-conditioning system is in sufficient according to the operating parameter of air-conditioning system
State, wherein operating parameter can be with are as follows: the corresponding saturation temperature of the high pressure of outdoor unit modules, the low pressure of outdoor unit modules are corresponding
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, details are not described herein again.
In air-conditioning system operation, the refrigerant state that module 10 obtains air-conditioning system is obtained, and be in abundance in cold coal amount
Exhaust port temperatures when state, when obtaining the exhaust port temperatures when operation of each compressor 1, and being run according to each compressor 1
Obtain maximum exhaust port temperatures difference Δ Tp_max between multiple compressors 1.Then judgment module 20 judges whether there is Δ Tp_
Max >=A illustrates that there are bigger bias current situations between compressor 1, therefore, control module 30 is prolonged if Δ Tp_max >=A
The time that long oil return valve is opened every time guarantees the refrigerant conveying capacity and oil lubrication feelings of compressor 1 to improve the recirculating oil quantity of system
Condition, also, the time that extension oil return valve 3 is opened every time is equivalent to a part exhaust for having bypassed compressor 1 and increases return-air
Air compensation, the delivery temperature being also beneficial between equalizing compressor 1.The device is according to the exhaust outlet between compressor as a result,
Temperature difference is adjusted the opening time of oil return valve, can occur the situation of oil return deficiency to avoid compressor, improve air-conditioning
System reliability of operation.
According to one embodiment of present invention, when maximum exhaust port temperatures difference Δ Tp_max is less than preset value A, control
Ordered pair oil return valve 3 is controlled when module 30 is also used to keep default.
Wherein in an embodiment of the present invention, as shown in figure 4, a cycle of default timing is, control oil return valve 3 is opened
After first time t_on, control oil return valve 3 closes the second time t_off.Wherein, control module 30 is by increasing first time t_
On and/or the second time t_off of reduction are 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 is controlled oil return valve 3 and is acted with timing shown in Fig. 4, wherein ON represents the opening of oil return valve 3, OFF
Represent the closing of oil return valve 3.And if it is determined that module 20 judges Δ Tp_max >=A, then control module 30 is on the basis of default timing
On, when the opening time of increase oil return valve 3 perhaps 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, guarantee 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 extension is opened every time of oil return valve 3 can be 2-10min.
In conclusion in air-conditioning system according to an embodiment of the present invention oil return valve control device, by obtain module exist
The coolant quantity of air-conditioning system obtains the exhaust port temperatures when operation of each compressor 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 judgment module judgement is 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 maximum exhaust port temperatures difference
Extend the time that oil return valve is opened every time when value.Thus, it is possible to which compressor is avoided 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 air-conditioning system, the control including oil return valve in 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 the opening time of oil return valve, so as to avoid compressor from oil return occur
Insufficient situation improves reliability of operation.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three
It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art
For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
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 be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height 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 spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. the control method of oil return valve in a kind of air-conditioning system, the air-conditioning system includes multiple compressors, oil eliminator, each
The exhaust outlet of the compressor is connected to the oil eliminator, and the oil return valve is arranged in the oil eliminator and each pressure
Between the gas returning port of contracting machine, which is characterized in that the described method comprises the following steps:
When the coolant quantity of the air-conditioning system is in sufficient state, the exhaust outlet temperature when operation of each compressor is obtained
Exhaust port temperatures when spending, and being run according to each compressor obtain maximum exhaust outlet temperature between the multiple compressor
It is poor to spend；
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 described in claim 1, which is characterized in that if the maximum row
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, which is characterized in that the one of the default timing
A period is after controlling the oil return valve unlatching first time, to control the oil return valve and closed for the second time, wherein pass through increasing
Add the first time and/or reduces second time to extend the time that the oil return valve is opened every time.
4. the control method of oil return valve in air-conditioning system as claimed in any one of claims 1-3, which is characterized 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, which is characterized in that the program quilt
The control method such as oil return valve in air-conditioning system of any of claims 1-4 is realized when processor executes.
6. the control device of oil return valve in a kind of air-conditioning system, the air-conditioning system includes multiple compressors, oil eliminator, each
The exhaust outlet of the compressor is connected to the oil eliminator, and the oil return valve is arranged in the oil eliminator and each pressure
Between the gas returning port of contracting machine, which is characterized in that the control device includes:
Module is obtained, when obtaining the operation of each compressor when being in sufficient state for the coolant quantity in the air-conditioning system
Exhaust port temperatures, and exhaust port temperatures when being run according to each compressor obtain it is maximum between the multiple compressor
Exhaust port temperatures it is poor；
Judgment module, for judging whether the maximum exhaust port temperatures difference is more than or equal to preset value；
Control module is 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, which is characterized 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 also used to keep default.
8. the control device of oil return valve in air-conditioning system as claimed in claim 7, which is characterized in that the one of the default timing
A period is after controlling the oil return valve unlatching first time, to control the oil return valve and closed for the second time, wherein the control
Molding block by increase 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 described in any one of claim 6-8, which is characterized 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, which is characterized in that including oil return in the air-conditioning system as described in any one of claim 6-9
The control device of valve.
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| Application Number | Priority Date | Filing Date | Title |
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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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| CN107388664B true CN107388664B (en) | 2019-12-03 |
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| CN111426040B (en) * | 2020-04-03 | 2021-12-14 | 广东美的暖通设备有限公司 | Air conditioner, operation control method of air conditioner, and readable storage medium |
Citations (4)
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|---|---|---|---|---|
| CN101158516A (en) * | 2002-08-30 | 2008-04-09 | 三洋电机株式会社 | Refrigerant cycling device |
| CN202581938U (en) * | 2012-04-18 | 2012-12-05 | Tcl空调器(中山)有限公司 | Parallel compressor system |
| CN103574991A (en) * | 2012-08-02 | 2014-02-12 | 珠海格力电器股份有限公司 | Oil return control method for multi-compressor system |
| CN105371532A (en) * | 2015-12-24 | 2016-03-02 | 重庆美的通用制冷设备有限公司 | Air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9146046B2 (en) * | 2010-07-28 | 2015-09-29 | Lg Electronics Inc. | Refrigerator and driving method thereof |
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2017
- 2017-08-16 CN CN201710703290.XA patent/CN107388664B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101158516A (en) * | 2002-08-30 | 2008-04-09 | 三洋电机株式会社 | Refrigerant cycling device |
| CN202581938U (en) * | 2012-04-18 | 2012-12-05 | Tcl空调器(中山)有限公司 | Parallel compressor system |
| CN103574991A (en) * | 2012-08-02 | 2014-02-12 | 珠海格力电器股份有限公司 | Oil return control method for multi-compressor system |
| CN105371532A (en) * | 2015-12-24 | 2016-03-02 | 重庆美的通用制冷设备有限公司 | Air conditioner |
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