CN106196771A - Gas-liquid separator, air conditioning system and control method of air conditioning system - Google Patents
Gas-liquid separator, air conditioning system and control method of air conditioning system Download PDFInfo
- Publication number
- CN106196771A CN106196771A CN201610753043.6A CN201610753043A CN106196771A CN 106196771 A CN106196771 A CN 106196771A CN 201610753043 A CN201610753043 A CN 201610753043A CN 106196771 A CN106196771 A CN 106196771A
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- Prior art keywords
- oil return
- gas
- liquid separator
- pipe
- oil
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- 239000007788 liquid Substances 0.000 title claims abstract description 106
- 238000004378 air conditioning Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000003134 recirculating effect Effects 0.000 claims description 39
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 2
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 16
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 159
- 230000001276 controlling effect Effects 0.000 description 11
- 239000010687 lubricating oil Substances 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 5
- 239000002826 coolant Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 235000003642 hunger Nutrition 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000037351 starvation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/28—Means for preventing liquid refrigerant entering into the compressor
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion 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
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compressor (AREA)
Abstract
The invention discloses a gas-liquid separator, which comprises: a housing; an air outlet pipe; and the oil return assembly comprises an oil return valve, the inlet end of the oil return valve is communicated with the inside of the shell, and the outlet end of the oil return valve is communicated with the air outlet pipe. The gas-liquid separator of the invention can lead the oil liquid at the bottom of the gas-liquid separator to be pumped into the air outlet pipe to be relayed and then return to the compressor, and the oil return amount can be controlled by controlling the action of the oil return valve in the oil return assembly, so that the oil return amount can be adjusted, thereby leading the system to effectively return oil on one hand, and avoiding the liquid impact of the compressor caused by excessive liquid refrigerant sucked in during oil return on the other hand, thereby being beneficial to improving the reliability of the system. The invention also discloses an air conditioning system and a control method of the air conditioning system.
Description
Technical field
The present invention relates to a kind of gas-liquid separator.The air conditioning system that the invention still further relates to there is described gas-liquid separator and
The control method of described air conditioning system.
Background technology
Gas-liquid separator is the vitals in refrigeration system (such as air conditioning system), and its effect on the one hand is segregative line
What system vaporizer was returned a small amount of does not evaporates cold-producing medium completely, it is ensured that the cold-producing medium of compressor not inspiration liquid and occur liquid hammer existing
As, thus avoid compressor to damage because liquid hammer occurs；Effect on the other hand is intended to a small amount of profit made bottom gas-liquid separator
Lubricating oil can be back in compressor, it is to avoid compressor occurs that oil starvation causes abrasion.
In order to realize the return of lubricating oil, prior art carries spill port to carry out inside most gas-liquid separator
Oil return.Typically, spill port is arranged on exhaustor and near the bottom of gas-liquid separator housing, so that bottom lacking of existing
Parts of lubricating oil can return compressor by means of the gas flow rate within exhaustor by spill port.This gas-liquid separator is only
Carry out oil return by spill port, and the aperture of spill port is changeless, thus uncontrollable recirculating oil quantity.Aperture is too small then
Likely oil return is not enough, although aperture is excessive ensure that oil return is abundant, but because also there being liquid refrigerants bottom gas-liquid separator,
Thus excessive aperture can cause the liquid refrigerants gone by spill port inspiration to hand over many, compressor liquid hammer thus can be caused.
Therefore, if effectively controlling the size of recirculating oil quantity, then the demand of compressor lubrication, the opposing party can on the one hand be met
Face avoids compressor to meet with the harm such as liquid hammer, thus improves compressor operating reliability.Particularly, if according to air conditioning system from
The operating condition of body controls recirculating oil quantity, then effect is even more ideal.Unfortunately, prior art there is no this skill
Art.
Summary of the invention
Based on the problems referred to above, present invention is primarily targeted at a kind of gas-liquid separator of offer, it can control easily
The size of recirculating oil quantity, thus the requirement of compressor lubrication can be met, it is avoided that again compressor liquid hammer.
It is a further object of the present invention to provide a kind of air conditioning system.
The yet another object of the present invention is to provide the control method of a kind of air conditioning system.
The object above of the present invention is to be achieved through the following technical solutions:
According to the first aspect of the invention, it is provided that a kind of gas-liquid separator, comprising:
Housing；
Escape pipe；With
Oil return assembly, described oil return assembly includes that oil return valve, the arrival end of described oil return valve connect with described enclosure interior,
The port of export of described oil return valve connects with described escape pipe.
Preferably, described oil return assembly also includes that oil return pipe, described oil return valve are connected on described oil return pipe.
Preferably, described oil return valve is positioned at described hull outside, and the first end of described oil return pipe inserts described enclosure interior,
Second end connects with described escape pipe.
Preferably, described escape pipe remain at least partially within described hull outside, the second end of described oil return pipe is at shell
External body connects with described escape pipe.
Preferably, the first end of described oil return pipe extends to the bottom of described housing after inserting described enclosure interior.
Preferably, described oil return valve includes electric expansion valve；Or, described oil return valve includes electromagnetic valve.
Preferably, when described oil return valve includes electromagnetic valve, described oil return pipe includes more than two oil returning branch pipes of parallel connection, often
It is respectively connected with electromagnetic valve on bar oil returning branch pipe.
Preferably, the internal diameter of any bar oil returning branch pipe is less than the internal diameter of the first end of described oil return pipe.
Preferably, described escape pipe includes the part being positioned at described housing, wherein, is positioned at the described portion of described housing
Divide and take the shape of the letter U.
The entrance of the described part being preferably located in described housing is near the top of described housing.
Preferably, also including air inlet pipe, one end of described air inlet pipe is inserted in described housing and horizontally extending.
Preferably, described oil return assembly also including, defecator, described defecator are arranged on the upper of described oil return valve
Trip side.
According to the second aspect of the invention, it is provided that a kind of air conditioning system, it includes compressor and gas-liquid separator, described
The escape pipe of gas-liquid separator communicates with the suction nozzle of described compressor, and wherein, described gas-liquid separator is one of the most any
Described gas-liquid separator.
Preferably, also including low pressure sensor, air-breathing temperature-sensitive bag and aerofluxus temperature-sensitive bag, wherein, described low pressure sensor sets
Putting the inlet end at described gas-liquid separator, described air-breathing temperature-sensitive bag is arranged on the escape pipe of described gas-liquid separator or described
On the suction nozzle of compressor, described aerofluxus temperature-sensitive bag is arranged on the exhaustor of described compressor.
According to the third aspect of the invention we, it is provided that the control method of foregoing air conditioning system, it includes step:
(1) the actual suction superheat of system is calculated；
(2) the target suction superheat that actual for system suction superheat is default with in air conditioning system is compared；
(3) action of oil return valve is controlled according to result of the comparison.
Preferably, in step (1), system is calculated by the delivery temperature of detecting system, suction temperature and pressure of inspiration(Pi)
Unite actual suction superheat；
And/or, in step (2), described target suction superheat includes corresponding to many under different delivery temperature intervals
Individual target suction superheat；
And/or, in step (3), if actual suction superheat is more than target suction superheat, then control the dynamic of oil return valve
Make to increase recirculating oil quantity；If actual suction superheat is equal to target suction superheat, then the state of oil return valve is kept to work as to maintain
Front oil return state；If actual suction superheat is less than target suction superheat, then control the action of oil return valve to reduce oil return
Amount.
The gas-liquid separator of the present invention is owing to being provided with oil return assembly so that the fluid bottom gas-liquid separator can be taken out
Then return in compressor in escape pipe, and by controlling the action of the oil return valve in oil return assembly, just can control oil return
Amount and/or return liquid measure, that is, make recirculating oil quantity scalable, thus on the one hand make system can effectively oil return, another aspect again may be used
Liquid refrigerants that when avoiding oil return, inspiration is too much and cause compressor liquid hammer, hence help to the reliability of raising system.
The air conditioning system of the present invention is owing to have employed the gas-liquid separator of the scalable recirculating oil quantity of the present invention, it is thus possible to root
Recirculating oil quantity is regulated, it is thus possible to ensureing that compressor lubrication is abundant according to actual condition (preferably according to the actual suction superheat of system)
On the premise of, it is to avoid suck too much liquid refrigerants during oil return and cause compressor liquid hammer, thus can guarantee that system reliability.
In the control method of the air conditioning system of the present invention, according to the deviation of actual suction superheat Yu target suction superheat
Value controls the action of oil return valve for foundation, realizes controlling in real time and regulating gas especially by adjusting electronic expansion valve opening
The recirculating oil quantity of liquid/gas separator, improves system reliability.
Accompanying drawing explanation
Below according to drawings and Examples, the present invention is described in further detail.
Fig. 1 is the structural representation of the gas-liquid separator according to the preferred embodiment of the present invention；
Fig. 2 is the principle skeleton diagram of the local of the air conditioning system of the preferred embodiment of the present invention；
Fig. 3 is the control method flow chart of the air conditioning system of the preferred embodiment of the present invention.
Detailed description of the invention
Cannot regulate and control recirculating oil quantity for the gas-liquid separator generally existed in prior art and return the problem of liquid measure,
The invention provides the gas-liquid separator of a kind of scalable recirculating oil quantity.
As it is shown in figure 1, the gas-liquid separator of the present invention includes housing 2, escape pipe 6 and oil return assembly 7.
Wherein, oil return assembly 7 includes oil return valve 5, and the arrival end of described oil return valve 5 is internal with described housing 2 to be connected, described
The port of export of oil return valve 5 connects with described escape pipe 6.
The gas-liquid separator of the present invention owing to being provided with oil return assembly, one end of the oil return valve in oil return assembly and housing 2
Internal connection, the other end are communicated to escape pipe 6, therefore, when there is swiftly flowing air-flow in escape pipe 6, escape pipe 6 with return
The seam pressure of fuel tap 5 can be less than the pressure bottom gas-liquid separator, and this pressure differential just makes the fluid bottom gas-liquid separator
It is pumped in escape pipe then return in compressor.In this case, by controlling the action of the oil return valve in oil return assembly,
Just can control recirculating oil quantity and/or return liquid measure, though also recirculating oil quantity scalable, thus on the one hand system can effectively be returned
Oil, liquid refrigerants that when on the other hand can avoid again oil return, inspiration is too much and cause compressor liquid hammer, hence help to improve system
The reliability of system.
Preferably, described oil return assembly 7 also includes that oil return pipe 3, described oil return valve 5 are connected on described oil return pipe 3.This
Arranging, be on the one hand easy to the two ends of oil return valve and the connection of corresponding construction, the layout on the other hand also making oil return assembly is cleverer
Live.
Preferably, described oil return valve 5 is positioned at the outside of described housing 2, and the first end of described oil return pipe 3 inserts (preferably warp
The spill port arranged on the sidewall of housing 2 inserts) described housing 2 inside, the second end connects with described escape pipe 6.
The outside remaining at least partially within described housing 2 of escape pipe 6, the second end of described oil return pipe 3 is preferably at housing 2
Outside and described escape pipe 6 connects.That is, oil return assembly 7 major part all may be provided at the outside of housing 2, consequently facilitating realize
Assemble and oil return valve is controlled, being not take up housing 2 inner space the most as far as possible.
Such as, escape pipe 6 can include the part being positioned at outside housing and be positioned at the part of housing, i.e. escape pipe 6 is from shell
Internal portion extends to hull outside through the gas outlet (being such as positioned at case top) on housing；Or, escape pipe 6 can also be
Being entirely located in hull outside, now the escape pipe 6 gas outlet on housing starts to stretch out.At this it should be noted that go out
Trachea 6 is not limited only to gaseous coolant and is discharged from, and liquid refrigerants and lubricating oil are also possible to discharge through escape pipe 6.
Preferably, as it is shown in figure 1, the first end of described oil return pipe 3 extends to described after inserting described housing 2 inside
The bottom of housing 2.That is, be provided with spill port on housing 2, the first end of oil return pipe 3 inserts in housing via this spill port
Portion, and to the curved extension of declivity, until the bottom of housing 2 of trying one's best, so that density is sink to the lubrication of housing bottom relatively greatly
Oil can enter in oil return pipe 3 via the pipeline opening of oil return pipe 3 first end easily.Wherein, spill port can be arranged on gas-liquid
The near-bottom of shell separator, it is also possible to be arranged at the even upper position of middle part, as long as ensureing the first end of oil return pipe to the greatest extent
Housing bottom may be extended to.
Preferably, described oil return valve 5 can use electric expansion valve.In this case, as long as controlling electric expansion valve
Aperture, the size of recirculating oil quantity can be conveniently adjusted.Such as, the aperture of electric expansion valve being tuned up, recirculating oil quantity just increases, will
The aperture of electric expansion valve is turned down, and recirculating oil quantity just reduces.Especially, by accurately controlling the knots modification of electronic expansion valve opening,
Ensure that the most adjustable of recirculating oil quantity.
When using electric expansion valve, only need to use an oil return pipe, and the caliber of oil return pipe be not excessively
In the case of tiny, the impact on recirculating oil quantity is little.
Alternatively, described oil return valve 5 can also use electromagnetic valve.In this case, if still using an oil return
Pipe, then, by controlling the switch of electromagnetic valve, just can control the switch of oil return assembly, such that it is able to realize disconnected as required
Continuous oil return, by controlling the time span of electromagnetic valve open and close, it is also possible to control the size of recirculating oil quantity roughly.
But, when described oil return valve uses electromagnetic valve, in order to recirculating oil quantity also can be better controled over, can be by described oil return
Pipe 3 is arranged in outside more than two the oil returning branch pipe (not shown) including parallel connection of described housing 2, and on every oil returning branch pipe
It is respectively connected with electromagnetic valve.That is, in addition to the part within the insertion housing 2 of oil return pipe 3, being positioned at outside housing of oil return pipe 3
Part is segmented into the oil returning branch pipe of more than two, controls leading to of a part in these oil returning branch pipes by each electromagnetic valve
Disconnected, just can control total recirculating oil quantity.For example, it is possible to make the caliber first end less than oil return pipe 3 of a wherein oil returning branch pipe
Internal diameter, so, when being only left this oil returning branch pipe and devoting oneself to work, total recirculating oil quantity will reduce.
Preferably, the internal diameter of any bar oil returning branch pipe is both less than the internal diameter of the first end of described oil return pipe 3.So, as long as
By the number of the electromagnetic valve that control is opened, namely control the number that oil returning branch pipe is devoted oneself to work, the most just can control total oil return
The size of amount.
Preferably, the internal diameter sum of all oil returning branch pipes is less than or equal to the internal diameter of the first end of described oil return pipe 3.
Preferably, when described escape pipe 6 includes the part being positioned at described housing 2, it is positioned at that portion of described housing 2
Divide and take the shape of the letter U.By being arranged to U-shaped so that the opening direction of the entrance of this part is upwards, in order to gaseous coolant enters
Enter with avoiding liquid refrigerants.
Preferably, the entrance of the part being positioned at described housing 2 of escape pipe 6 near the top of described housing 2,
This entrance so can be made far as possible from the liquid level in gas-liquid separator, make liquid refrigerants be difficult to enter in escape pipe.
As common in institute, the gas-liquid separator of the present invention also includes air inlet pipe 1, however, it is preferred that described air inlet pipe 1
One end insert in described housing 2 and horizontally extending, such as, when it inserts from case top, the most curved after insertion
The most horizontally.It is particularly preferred that one end of air inlet pipe 1 is horizontally extending in the position near housing 2 top.This
Make the coolant entering gas-liquid separator blow to inner walls at high position, it is to avoid to blow to the liquid level of lower housing portion and make as far as possible
Liquid refrigerants is become to splash.It is particularly preferred that the entrance that the U-shaped portion of escape pipe 6 is divided is higher than the pipe outlet of air inlet pipe 1, and
And the two is the most away from each other, thus the coolant of blowout in air inlet pipe 1 is avoided to be directly entered most possibly
In escape pipe 6.
Preferably, still as it is shown in figure 1, also include defecator 7 in described oil return assembly 7, described defecator 4 is arranged on
The upstream side of described oil return valve 5, thus oil return can be filtered, with avoid enclosure interior impurity particle that may be present etc. with
Oil return enters compressor.
As fully visible, the gas-liquid separator of the present invention can be conveniently adjusted recirculating oil quantity, thus is the air-conditioning system including it
System provides the possibility controlling recirculating oil quantity according to actual condition, on the one hand can ensure that a small amount of oil bottom gas-liquid separator has in time
Return in compressor to effect, it is to avoid cause the phenomenon of compressor abrasion because oil starvation occurs；On the other hand can ensure that compressor is not
Inspiration liquid refrigerant and there is liquid hit phenomenon.
On the basis of above-mentioned work, the present invention additionally provides a kind of air conditioning system, and it includes compressor and aforesaid
Gas-liquid separator, wherein, the escape pipe of described gas-liquid separator communicates with the suction nozzle of described compressor.
Owing to have employed the gas-liquid separator of the scalable recirculating oil quantity of the present invention, the air conditioning system of the present invention can be according to reality
Border operating mode (preferably according to the actual suction superheat of system) regulates recirculating oil quantity, it is thus possible to before ensureing that compressor lubrication is sufficiently
Put, it is to avoid suck too much liquid refrigerants during oil return and cause compressor liquid hammer, thus can improve system reliability.
Preferably, as in figure 2 it is shown, the air conditioning system of the present invention except include the first compressor 13 and gas-liquid separator 10 with
Outward, low pressure sensor 11, air-breathing temperature-sensitive bag 12 and first exhaust temperature-sensitive bag 14 are also included.Wherein, described low pressure sensor 11 sets
Putting the inlet end (being such as connected in air inlet pipe) at described gas-liquid separator 10, described air-breathing temperature-sensitive bag 12 is arranged on described gas
On the escape pipe of liquid/gas separator 10 or on the suction nozzle of described first compressor 13, described first exhaust temperature-sensitive bag 14 is arranged on institute
State on the exhaustor of the first compressor 13.By arranging low pressure sensor 11, air-breathing temperature-sensitive bag 12 and first exhaust temperature-sensitive bag 14,
Can the pressure of inspiration(Pi) of detecting system, suction temperature and delivery temperature easily, such that it is able to easily and timely calculate system
Actual suction superheat, in order to provide foundation for accurately regulation recirculating oil quantity.
It is further preferred that as in figure 2 it is shown, the air conditioning system of the present invention includes two compressors in parallel, respectively
One compressor 13 and the second compressor 15, and use the gas-liquid separator 10 of scalable recirculating oil quantity simultaneously.Correspondingly, the first compression
The exhaustor of machine 13 is provided with first exhaust temperature-sensitive bag 14, and the exhaustor of the second compressor 15 is provided with second exhaust temperature-sensitive bag
16.Being additionally provided with oil eliminator 17 in air conditioning system, this oil eliminator 17 is arranged on the downstream of the exhaustor of each compressor, in order to
By the lubricating oil separation included in compressor air-discharging out, and return gas-liquid separator 10.Cold-producing medium and oil mixture
In air inlet pipe enters gas-liquid separator, a small amount of lubricating oil bottom gas-liquid separator returns to air-breathing along with air-flow through oil return assembly
Side enters compressor, realizes recirculating oil quantity scalable by oil return valve.
On the basis of above-mentioned work, present invention also offers the control method of above-mentioned air conditioning system, including step:
(1) the actual suction superheat of system is calculated；
(2) the target suction superheat that actual for system suction superheat is default with in air conditioning system is compared；
(3) action of oil return valve is controlled according to result of the comparison.
Preferably, in step (1), air conditioning system is by the delivery temperature of detecting system, suction temperature and pressure of inspiration(Pi)
The actual suction superheat of the system that calculates.
Preferably, in step (2), the described target suction superheat preset includes corresponding to different delivery temperatures interval
Under multiple target suction superheat, its should be in advance with ensure not have liquid hammer, guarantee system reliability for according to and
Set, and set different desired values according to different delivery temperature intervals.
Preferably, in step (3), if actual suction superheat is more than target suction superheat, the actual degree of superheat is inclined
Greatly, then the action of oil return valve is controlled to increase recirculating oil quantity；If actual suction superheat is equal to target suction superheat, actual mistake
Temperature meets desired value, then keep the state of oil return valve to maintain current oil return state；If actual suction superheat is less than mesh
Mark suction superheat, the actual degree of superheat is not enough, illustrates that the liquid refrigerants returning compressor is more, then controls the action of oil return valve
To reduce recirculating oil quantity, thus inspiration too much liquid refrigerants when preventing oil return, it is to avoid there is liquid hammer in compressor.
Preferably, if described oil return valve includes electric expansion valve, then step (3) includes controlling opening of described electric expansion valve
Degree size.That is, if actual suction superheat is more than target suction superheat, then tunes up the aperture of electric expansion valve, thus can increase
Big recirculating oil quantity；If actual suction superheat is equal to target suction superheat, then the aperture keeping electric expansion valve is constant, thus ties up
Hold current oil return state；If actual suction superheat is less than target suction superheat, then turn the aperture of electric expansion valve down, from
And reduce recirculating oil quantity.Especially, it is also possible to according to the difference size of actual suction superheat Yu target suction superheat, electricity is calculated
The aperture change value of sub-expansion valve, difference is the biggest, and aperture change value is the biggest, thus reaches the most quickly and accurately to regulate back
The purpose of oil mass.
If described oil return valve includes electromagnetic valve, then step (3) includes the switch controlling described electromagnetic valve.That is, inhale if actual
The gas degree of superheat is more than target suction superheat, then increase the electromagnetic valve opened number (i.e. open on the basis of original more to
A few electromagnetic valve), thus recirculating oil quantity can be increased；If actual suction superheat is equal to target suction superheat, then stay open
The invariable number of electromagnetic valve, thus maintain current oil return state；If actual suction superheat is less than target suction superheat,
Then reduce the number (i.e. many at least one electromagnetic valves of closedown on the basis of original) of the electromagnetic valve opened, thus reduce oil return
Amount.
Using electric expansion valve as a example by the air conditioning system of the preferred implementation of oil return valve using the present invention, it is preferred
The flow chart of control method is as shown in Figure 3.Its control method is as follows:
First, to ensure that system does not haves liquid hammer, guarantees that system reliability is for according to being set in different delivery temperature district
Target superheat degree under between, and prestored within air-conditioning systems.
Secondly, in system normal course of operation, by the delivery temperature of detecting system, suction temperature and pressure of inspiration(Pi),
The actual suction superheat of calculating system.
Again, calculate the actual suction superheat of system and the deviation value of target superheat degree, and using this deviation value as electronics
Expansion valve regulation foundation.In this step, need according to different delivery temperatures interval, select corresponding target suction superheat.
Then, according to the variable quantity of the degree of superheat inclined mathematic interpolation electronic expansion valve opening, regulate electronic expansion valve opening: if
The actual suction superheat of system is more than target suction superheat, and actual suction superheat is bigger than normal, then the aperture of electric expansion valve
Can tune up, and then increase the recirculating oil quantity of gas-liquid separator；If the actual suction superheat of system is equal to target suction superheat, the most in fact
Border suction superheat meets desired value, then the aperture of electric expansion valve is constant, keeps current oil return state；If the actual air-breathing of system
The degree of superheat is less than target suction superheat, and the liquid refrigerants that the explanation of degree of superheat deficiency returns is more, then the aperture of electric expansion valve
Needs are turned down, and now recirculating oil quantity reduces, inspiration too much liquid refrigerants when can prevent oil return, it is to avoid liquid hammer occurs in compressor.
In the control method of the air conditioning system of the preferred embodiment of the present invention, inhale with target according to actual suction superheat
The deviation value of the gas degree of superheat is according to the aperture knots modification calculating electric expansion valve, real by adjusting electronic expansion valve opening
Control during reality and the recirculating oil quantity of regulation gas-liquid separator, further increase system reliability.
Those skilled in the art is it is easily understood that on the premise of not conflicting, above-mentioned each preferred version can be free
Ground combination, superposition.
Should be appreciated that above-mentioned embodiment is only illustrative, and not restrictive, basic without departing from the present invention
In the case of principle, those skilled in the art can for above-mentioned details make various significantly or the amendment of equivalent or replace
Change, be all included in scope of the presently claimed invention.
Claims (16)
1. a gas-liquid separator, it is characterised in that including:
Housing；
Escape pipe；With
Oil return assembly, described oil return assembly includes oil return valve, and the arrival end of described oil return valve connects with described enclosure interior, described
The port of export of oil return valve connects with described escape pipe.
Gas-liquid separator the most according to claim 1, it is characterised in that described oil return assembly also includes oil return pipe, described
Oil return valve is connected on described oil return pipe.
Gas-liquid separator the most according to claim 2, it is characterised in that described oil return valve is positioned at described hull outside, institute
The first end stating oil return pipe inserts described enclosure interior, and the second end connects with described escape pipe.
Gas-liquid separator the most according to claim 3, it is characterised in that remaining at least partially within of described escape pipe is described
Hull outside, the second end of described oil return pipe connects with described escape pipe in hull outside.
Gas-liquid separator the most according to claim 3, it is characterised in that the first end of described oil return pipe inserts described housing
Extend to the bottom of described housing behind inside.
6. according to the gas-liquid separator one of claim 1-5 Suo Shu, it is characterised in that described oil return valve includes electronic expansion
Valve；Or, described oil return valve includes electromagnetic valve.
Gas-liquid separator the most according to claim 6, it is characterised in that when described oil return valve includes electromagnetic valve, described time
Oil pipe includes more than two oil returning branch pipes of parallel connection, and every oil returning branch pipe is respectively connected with electromagnetic valve.
Gas-liquid separator the most according to claim 7, it is characterised in that the internal diameter of any bar oil returning branch pipe is less than described time
The internal diameter of the first end of oil pipe.
9. according to the gas-liquid separator one of claim 1-5 Suo Shu, it is characterised in that described escape pipe includes being positioned at described shell
Internal part, wherein, the described part being positioned at described housing takes the shape of the letter U.
Gas-liquid separator the most according to claim 9, it is characterised in that be positioned at the pipe of the described part of described housing
Road entrance is near the top of described housing.
11. according to the gas-liquid separator one of claim 1-5 Suo Shu, it is characterised in that also include air inlet pipe, described air inlet pipe
One end insert in described housing and horizontally extending.
12. according to the gas-liquid separator one of claim 1-5 Suo Shu, it is characterised in that also included in described oil return assembly
Filter device, described defecator is arranged on the upstream side of described oil return valve.
13. 1 kinds of air conditioning systems, it includes compressor and gas-liquid separator, the escape pipe of described gas-liquid separator and described compression
The suction nozzle of machine communicates, it is characterised in that described gas-liquid separator is according to the gas-liquid separation one of claim 1-12 Suo Shu
Device.
14. air conditioning systems according to claim 13, it is characterised in that also include low pressure sensor, air-breathing temperature-sensitive bag and
Aerofluxus temperature-sensitive bag, wherein, described low pressure sensor is arranged on the inlet end of described gas-liquid separator, and described air-breathing temperature-sensitive bag is arranged
On the escape pipe of described gas-liquid separator or on the suction nozzle of described compressor, described aerofluxus temperature-sensitive bag is arranged on described compression
On the exhaustor of machine.
15. according to the control method of the air conditioning system described in claim 13 or 14, it is characterised in that include step:
(1) the actual suction superheat of system is calculated；
(2) the target suction superheat that actual for system suction superheat is default with in air conditioning system is compared；
(3) action of oil return valve is controlled according to result of the comparison.
16. control methods according to claim 15, it is characterised in that:
In step (1), calculate system actual air-breathing mistake by the delivery temperature of detecting system, suction temperature and pressure of inspiration(Pi)
Temperature；
And/or, in step (2), described target suction superheat includes corresponding to the multiple mesh under different delivery temperature intervals
Mark suction superheat；
And/or, in step (3), if actual suction superheat more than target suction superheat, then control the action of oil return valve with
Increase recirculating oil quantity；If actual suction superheat is equal to target suction superheat, then keep the state of oil return valve to remain current
Oil return state；If actual suction superheat is less than target suction superheat, then control the action of oil return valve to reduce recirculating oil quantity.
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| CN201610753043.6A CN106196771A (en) | 2016-08-29 | 2016-08-29 | Gas-liquid separator, air conditioning system and control method of air conditioning system |
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|---|---|---|---|
| CN201610753043.6A CN106196771A (en) | 2016-08-29 | 2016-08-29 | Gas-liquid separator, air conditioning system and control method of air conditioning system |
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| CN107178943A (en) * | 2017-06-21 | 2017-09-19 | 广东美的暖通设备有限公司 | Air-conditioning system and its method for controlling oil return and device |
| CN109373634A (en) * | 2018-10-29 | 2019-02-22 | 宁波奥克斯电气股份有限公司 | A kind of method for controlling oil return, device and air conditioner |
| CN109579347A (en) * | 2018-12-04 | 2019-04-05 | 南京天加环境科技有限公司 | A kind of multi-line system and its control method that can be avoided compressor and return liquid |
| CN109813009A (en) * | 2018-12-20 | 2019-05-28 | 珠海格力电器股份有限公司 | Air conditioning system and oil return control method thereof |
| CN110319520A (en) * | 2019-08-01 | 2019-10-11 | 中车大连机车研究所有限公司 | Integration backheat gas-liquid separator and refrigeration system for carbon dioxide refrigerant air-conditioning |
| CN110892213A (en) * | 2017-07-27 | 2020-03-17 | 三菱电机株式会社 | Refrigeration cycle device |
| CN111536718A (en) * | 2020-05-18 | 2020-08-14 | 蓬莱和信制冷设备有限公司 | Adaptive super-efficient gas-liquid separator of parallel compressor set |
| CN112856858A (en) * | 2021-01-25 | 2021-05-28 | 珠海格力电器股份有限公司 | Compressor oil return system, oil return control method and air conditioning system with same |
| CN112984880A (en) * | 2021-03-04 | 2021-06-18 | 珠海格力电器股份有限公司 | Method and device for adjusting oil supply amount of compressor, computer equipment and storage medium |
| CN113944964A (en) * | 2021-10-28 | 2022-01-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN115151767A (en) * | 2020-02-20 | 2022-10-04 | 株式会社电装 | Refrigeration cycle device |
| CN115164450A (en) * | 2022-07-25 | 2022-10-11 | 珠海格力电器股份有限公司 | Oil return structure, steam separation device, compressor and oil return control method |
| CN116242050A (en) * | 2023-05-12 | 2023-06-09 | 广东美的暖通设备有限公司 | Temperature control device, oil return control method of temperature control device and computer storage medium |
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| CN110319520A (en) * | 2019-08-01 | 2019-10-11 | 中车大连机车研究所有限公司 | Integration backheat gas-liquid separator and refrigeration system for carbon dioxide refrigerant air-conditioning |
| CN115151767A (en) * | 2020-02-20 | 2022-10-04 | 株式会社电装 | Refrigeration cycle device |
| CN111536718A (en) * | 2020-05-18 | 2020-08-14 | 蓬莱和信制冷设备有限公司 | Adaptive super-efficient gas-liquid separator of parallel compressor set |
| CN111536718B (en) * | 2020-05-18 | 2021-11-02 | 山东智珩环境设备有限公司 | Adaptive super-efficient gas-liquid separator of parallel compressor set |
| CN112856858A (en) * | 2021-01-25 | 2021-05-28 | 珠海格力电器股份有限公司 | Compressor oil return system, oil return control method and air conditioning system with same |
| CN112984880A (en) * | 2021-03-04 | 2021-06-18 | 珠海格力电器股份有限公司 | Method and device for adjusting oil supply amount of compressor, computer equipment and storage medium |
| CN113944964A (en) * | 2021-10-28 | 2022-01-18 | 珠海格力电器股份有限公司 | Air conditioning system |
| CN115164450A (en) * | 2022-07-25 | 2022-10-11 | 珠海格力电器股份有限公司 | Oil return structure, steam separation device, compressor and oil return control method |
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