CN208901694U - Air conditioner circulating system and air-conditioning - Google Patents
Air conditioner circulating system and air-conditioning Download PDFInfo
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- CN208901694U CN208901694U CN201821707946.1U CN201821707946U CN208901694U CN 208901694 U CN208901694 U CN 208901694U CN 201821707946 U CN201821707946 U CN 201821707946U CN 208901694 U CN208901694 U CN 208901694U
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Abstract
The utility model relates to a kind of air conditioner circulating systems, including compressor, oil eliminator, First Heat Exchanger, restricting element, the second heat exchanger and oil return branch.Compressor, oil eliminator, First Heat Exchanger and the second heat exchanger forming circuit, the oil return branch entrance of oil return branch is connected to the oil return hole of oil eliminator, the oil return branch way outlet of oil return branch is connected to the air inlet of compressor, and oil return branch road is equipped with the adjustable throttling set of aperture.According to different operating conditions, adjust the opening size of throttling set, not only guaranteed unit can normal oil return, but also the energy loss of oil return bypass can be reduced, improve unit reliability of operation, while reducing energy loss.
Description
Technical field
The utility model relates to air-conditioning technical fields, more particularly to a kind of air conditioner circulating system and air-conditioning.
Background technique
Existing air-conditioning system includes indoor heat exchanger, outdoor heat exchanger and compressor, and refrigerant is formed in above-mentioned each component
Circuit in recycle.Indoor heat exchanger and outdoor heat exchanger one of them as evaporator, another is as condenser.From compression
The high temperature and pressure refrigerant that machine comes out, which enters, is condensed into liquid in condenser, then flow in evaporator and flash to low-temp low-pressure gas
Body eventually passes back in compressor.Core component of the compressor as entire air-conditioning system causes compressor once oil starvation operates
Overheat is even burnt, and will lead to whole system can not operate normally, and reduces system reliability of operation.Therefore, air-conditioning is controlled
It is very important for the oil return of system.
In the prior art, the oil return of air-conditioning system is by the way that high-low pressure is arranged between oil eliminator and compressor inlet
The oil return capillary of bypass exists as following drawbacks come what is carried out:
1) during oil eliminator oil return, there are oil return bypass, generate very big energy loss；
2) restriction effect of capillary is consistent always, if capillary is small, unit can not normal oil return；If capillary is thick, machine
The ability bypass of group is larger.
Utility model content
The utility model exists when using capillary oil return for existing air-conditioning system, and the thin unit of capillary can not be returned normally
Oil, the thick unit capacity of capillary bypass larger problem, provide a kind of air conditioner circulating system, air-conditioning and air-conditioning.
A kind of air conditioner circulating system, including compressor, oil eliminator, First Heat Exchanger, restricting element, the second heat exchanger with
And oil return branch:
The compressor, the oil eliminator, restricting element and second heat exchanger described in the First Heat Exchanger
Forming circuit；
The oil return branch entrance of the oil return branch is connected to the oil return hole of the oil eliminator, and the oil return branch returns
Oily branch way outlet is connected to the air inlet of the compressor, and the oil return branch road is equipped with the adjustable throttling set of aperture.
The adjustable throttling set of the aperture is the first electric expansion valve in one of the embodiments,.
In one of the embodiments, between the oil return hole of the oil eliminator and the adjustable throttling set of the aperture
Equipped with first filter.
It in one of the embodiments, further include heat exchange gas-liquid separator, the heat exchange gas-liquid separator includes heat exchange branch
Road and gas-liquid separation branch:
First refrigerant port of the heat exchange branch and the second open communication of second heat exchanger, the heat exchange branch
The second refrigerant port and the First Heat Exchanger the second open communication；
The refrigerant inlet of the gas-liquid separation branch selectively with the first of the First Heat Exchanger the opening or described the
The refrigerant exit of first open communication of two heat exchangers, the gas-liquid separation branch is connected to the air inlet of the compressor.
It in one of the embodiments, further include gas-liquid separator, the refrigerant inlet of the gas-liquid separator and the gas
Liquid separates the refrigerant exit connection of branch, and the refrigerant exit of the gas-liquid separator is connected to the air inlet of the compressor.
It in one of the embodiments, further include four-way valve, the row of the first port of the four-way valve and the compressor
Port connection, the first open communication of the second port of the four-way valve and the First Heat Exchanger, the third of the four-way valve
Port is connected to the refrigerant inlet of the gas-liquid separation branch, and the of the 4th port of the four-way valve and second heat exchanger
One open communication, wherein
The first port of the four-way valve is connected to the second port of the four-way valve, the third port of the four-way valve with
4th port of the four-way valve is connected to；
Alternatively,
The first port of the four-way valve is connected to the 4th port of the four-way valve, the second port of the four-way valve with
The third port of the four-way valve is connected to.
The restricting element is the second electric expansion valve in one of the embodiments, and second electric expansion valve is set
It is placed between the second opening of the First Heat Exchanger and the second refrigerant port of the heat exchange branch.
In one of the embodiments, between the second opening and second electric expansion valve of the First Heat Exchanger also
Equipped with the second filter.
First refrigerant end of the second opening of second heat exchanger and the heat exchange branch in one of the embodiments,
Third filter is provided between mouthful.
A kind of air-conditioning, including air conditioner circulating system as described above.
Based on the above-mentioned technical proposal, the utility model embodiment at least can produce following technical effect:
Above-mentioned air conditioner circulating system, including compressor, oil eliminator, First Heat Exchanger, restricting element, the second heat exchanger with
And oil return branch.Compressor, oil eliminator, First Heat Exchanger and the second heat exchanger forming circuit, the oil return branch of oil return branch
Road entrance is connected to the oil return hole of oil eliminator, and the oil return branch way outlet of oil return branch is connected to the air inlet of compressor, oil return
Branch road is equipped with the adjustable throttling set of aperture.According to different operating conditions, the opening size of throttling set is adjusted, is guaranteed
Lubricating oil in oil eliminator rapidly returns back in compressor, and compressor oil starvation is avoided to cause to damage, and improves the reliability of system.Together
When can be avoided from exhaust outlet of compressor come out high pressure gaseous refrigerant by throttling set directly return compressor into
Port reduces energy loss caused by unnecessary oil return bypasses.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide a further understanding of the present invention, the utility model
Illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the schematic diagram for the air conditioner circulating system that an embodiment of the present invention provides；
Fig. 2 is the schematic diagram when air conditioner circulating system that an embodiment of the present invention provides is in heating mode operation；
When Fig. 3 is that the air conditioner circulating system that provides of an embodiment of the present invention is in refrigeration mode or defrost pattern is run
Schematic diagram.
Description of symbols:
100- compressor
The exhaust outlet of 110- compressor
The air inlet of 120- compressor
200- oil eliminator
The air inlet of 210- oil eliminator
The exhaust outlet of 220- oil eliminator
300- First Heat Exchanger
First opening of 310- First Heat Exchanger
Second opening of 320- First Heat Exchanger
The second heat exchanger of 400-
First opening of the second heat exchanger of 410-
Second opening of the second heat exchanger of 420-
500- oil return branch
510- oil return branch entrance
520- oil return branch way outlet
530- throttling set
540- first filter
600- heat exchange gas-liquid separator
610- heat exchange branch
First refrigerant port of 611- heat exchange branch
Second refrigerant port of 612- heat exchange branch
620- gas-liquid separation branch
The refrigerant inlet of 621- gas-liquid separation branch
The refrigerant exit of 622- gas-liquid separation branch
700- gas-liquid separator
The refrigerant inlet of 710- gas-liquid separator
The refrigerant exit of 720- gas-liquid separator
800- four-way valve
The first port of 810- four-way valve
The second port of 820- four-way valve
The third port of 830- four-way valve
4th port of 840- four-way valve
The second electric expansion valve of 900-
The second filter of 910-
920- third filter
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It is only exemplary to the description of specific embodiment below, it should
Understand, specific implementation described herein is only used to explain the utility model, and is definitely not to the utility model and its application
Or the limitation of usage.
It should be noted that it can directly on the other element when element is referred to as " being fixed on " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.On the contrary, intermediary element is not present when element is connect referred to as " direct " with another element.This paper institute
The term "vertical", "horizontal", "left" and "right" used and similar statement are for illustrative purposes only.
In the description of the present invention, it should be understood that term " length ", " width ", " thickness ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.
More detailed illustrate is carried out to technical solution provided by the utility model below with reference to Fig. 1 to Fig. 3.
Referring to Fig. 1, providing a kind of air conditioner circulating system in an embodiment of the utility model, including compressor 100, oil
Separator 200, First Heat Exchanger 300, restricting element, the second heat exchanger 400 and oil return branch 500.The compressor 100,
The oil eliminator 200, the First Heat Exchanger 300, the restricting element and second heat exchanger 400 forming circuit.
The air inlet 210 of the oil eliminator 200 is connected to the exhaust outlet 120 of the compressor 100, and the oil return branch 500 returns
Oily branch entrance 510 is connected to the oil return hole of the oil eliminator 200, the oil return branch way outlet 520 of the oil return branch 500 with
The air inlet 120 of the compressor 100 is connected to, and the oil return branch 500 is equipped with the adjustable throttling set 530 of aperture, section
The opening size for flowing device 530 is adjustable, and the aperture by adjusting throttling set 530 may be implemented in oil eliminator 200
Recirculating oil quantity carries out real-time monitoring.
First Heat Exchanger 300 can use finned heat exchanger or full-liquid type case tube heat exchanger, and the second heat exchanger 400 can be with
Using finned heat exchanger or full-liquid type case tube heat exchanger.Full-liquid type case tube heat exchanger has the spy that refrigerating capacity is big, Energy Efficiency Ratio is high
Point, so using shell and tube exchanger preferable when as indoor heat exchanger.
Referring to Fig. 1, the throttling set can be the first electric expansion valve in one of the embodiments, electronics is swollen
Swollen threshold sensitivity is high, adjusts reaction fastly, can be suitably used for the occasion of operating condition wider range.
Above-mentioned technical proposal is arranged, the oil return between the oil eliminator 200 and the air inlet 110 of compressor 100
Branch 500 is provided with the first electric expansion valve on the oil return branch 500, according to the different operating condition of unit, described in adjusting
The opening size of first electric expansion valve.When the outdoor environment temperature locating for the compressor 100 is higher, the exhaust of compressor 100
The delivery temperature of mouth 120 is relatively high, and the oil mass being discharged from the exhaust outlet 120 of compressor 100 is larger, in returning for compressor 100
It, just should be compared with by the oil mass of the oil return branch 500 back to the air inlet 110 of compressor 100 in the case that oil cut rate is certain
More, the aperture for adjusting first electric expansion valve at this time increases, and the lubricating oil for separating the oil eliminator 200 passes through
The oil return branch 500 returns in compressor 100 in time, avoids compressor oil starvation.The outdoor environment locating for the compressor 100
When temperature is lower, the delivery temperature of the exhaust outlet 120 of compressor 100 is relatively low, is discharged from the exhaust outlet 120 of compressor 100
Oil mass it is less, in the case where the oil return ratio of compressor 100 is certain, by the oil return branch 500 return to compressor 100
The oil mass of air inlet 110 just should be less, the aperture for adjusting first electric expansion valve at this time reduces, and makes the oil separation
The lubricating oil that device 200 is separated is returned in compressor 100 in time by the oil return branch 500, avoids compressor oil starvation.
Meanwhile the smaller high temperature that can occasionally avoid coming out from the exhaust outlet 120 of the compressor 100 of aperture of first electric expansion valve
High-pressure gaseous refrigerant does not recycle in systems but is directly returned in compressor 100 and caused by the oil return branch 500
Energy loss.According to the different operating condition of unit, the opening size of first electric expansion valve is adjusted, had both guaranteed unit energy
Enough normal oil returns, improve unit reliability of operation, while can reduce the energy loss of oil return bypass again.
Referring to Fig. 1, being set between the oil return hole of the oil eliminator and the throttling set in one of the embodiments,
There is first filter 540.First filter 540 can be used for filtering the lubrication flowed out from the oil return opening of the oil eliminator 200
The impurity having in oil avoids impurity from blocking first electric expansion valve and influence the sensitive of first electric expansion valve
Degree.
Please continue to refer to Fig. 1, air conditioner circulating system further includes heat exchange gas-liquid separator 600 in one of the embodiments,
The heat exchange gas-liquid separator 600 includes heat exchange branch 610 and gas-liquid separation branch 620.The first of the heat exchange branch 610 is cold
Matchmaker port 611 is connected to the second opening 420 of second heat exchanger 400, the second refrigerant port of the heat exchange branch 610
612 are connected to the second opening 320 of the First Heat Exchanger 300.The refrigerant inlet 621 of the gas-liquid separation branch 620 is optional
It is connected to the first opening 410 of the first 310 or described second heat exchangers 400 of opening of the First Heat Exchanger 300 with selecting, it is described
The refrigerant exit 622 of gas-liquid separation branch 620 is connected to the air inlet 120 of the compressor 100.
Above-mentioned technical proposal, the high temperature using the heat exchange gas-liquid separator 600 with heat exchange function, from condenser out
Liquid refrigerants can carry out hot friendship in the heat exchange gas-liquid separator 600 with from the cryogenic gaseous refrigerant come out in evaporator
It changes, so that the temperature of high-temperature liquid state refrigerant reduces, to increase degree of supercooling, while the temperature of cryogenic gaseous refrigerant is increased,
The degree of superheat is promoted, to improve the heat-exchange capacity of air-conditioning system.
Above-mentioned air-conditioning system can be run under the first operating mode and the second operating mode.First operating mode includes
Heating mode.When air conditioner circulating system is in heating mode, refrigerant circulation schematic diagram is shown in Figure 2.Second Working mould
Formula includes refrigeration mode and defrosting mode.When air conditioner circulating system is in refrigeration mode, refrigerant circulation schematic diagram is referring to Fig. 3
It is shown.When defrosting mode, refrigerant circulation schematic diagram and refrigeration mode are substantially identical.
Referring to Fig. 2, air conditioner circulating system is in following connected state when air conditioner circulating system is in heating mode:
The exhaust outlet 110 of the compressor 100 is connected to the air inlet 210 of the oil eliminator 200, the row of the oil eliminator 200
First opening 310 of port 220 and the First Heat Exchanger 300 be connected to, the second opening 320 of the First Heat Exchanger 300 and
The second refrigerant port 612 connection of the heat exchange branch 610.First refrigerant port 611 of the heat exchange branch 610 and described the
420 connection of the second opening of two heat exchangers 400, the first opening 410 of second heat exchanger 400 and the gas-liquid separation branch
620 refrigerant inlet 621 is connected to, the air inlet of the refrigerant exit 622 of the gas-liquid separation branch 620 and the compressor 100
120 connections.Under above-mentioned connected state as shown in solid arrow in Fig. 2, refrigerant is flowed according to following path: compressor 100 comes out
Refrigerant flow to oil eliminator 200, First Heat Exchanger 300, heat exchange gas-liquid separator 600 heat exchange branch 610 the second refrigerant
Port 612, the first refrigerant port 611 of the heat exchange branch 610 of heat exchange gas-liquid separator 600, the second heat exchanger 400, exchanging air
The gas-liquid separation branch 620 of the refrigerant inlet 621 of the gas-liquid separation branch 620 of liquid/gas separator 600, the gas-liquid separator 600 that exchanges heat
Refrigerant exit 622, be then return to compressor 100.
Referring to Fig. 3, air conditioner circulating system is in following when air conditioner circulating system is in refrigeration mode or defrost pattern
Connected state: the exhaust outlet 110 of the compressor 100 is connected to the air inlet 210 of the oil eliminator 200, the oil separation
The exhaust outlet 220 of device 200 is connected to the first opening 410 of the second heat exchanger 400, the second opening of second heat exchanger 400
420 be connected tos with the first refrigerant port 611 of the heat exchange branch 610, the second refrigerant port 612 of the heat exchange branch 610 and
320 connection of the second opening of the First Heat Exchanger 300, the first opening 310 and the gas-liquid point of the First Heat Exchanger 300
Refrigerant inlet 621 from branch 620 is connected to, the refrigerant exit 622 of the gas-liquid separation branch 620 and the compressor 100
Air inlet 120 is connected to.Under above-mentioned connected state as shown in dotted arrow in Fig. 3, refrigerant is flowed according to following path: compressor
100 refrigerants come out flow to the heat exchange branch 610 of gas-liquid separator 200, second heat exchanger 400, heat exchange gas-liquid separator 600
First refrigerant port 611, the second refrigerant port 612 of the heat exchange branch 610 of heat exchange gas-liquid separator 600, First Heat Exchanger
300, the refrigerant inlet 621 of gas-liquid separation branch 620 of gas-liquid separator 600, the gas-liquid for the gas-liquid separator 600 that exchanges heat of exchanging heat are divided
Refrigerant exit 622 from branch 620, is then return to compressor 100.
It please refers to Fig.1 to Fig.3, air conditioner circulating system further includes gas-liquid separator 700.The gas-liquid separator 700 it is cold
Matchmaker's entrance 710 is connected to the refrigerant exit 622 of the gas-liquid separation branch 620, the refrigerant exit of the gas-liquid separator 700
720 are connected to the air inlet 120 of the compressor 100.Wherein:
When air conditioner circulating system is in heating mode, as shown in solid arrow in Fig. 2, refrigerant is flowed according to following path
Dynamic: the refrigerant that compressor 100 comes out flows to the heat exchange branch of oil eliminator 200, First Heat Exchanger 300, the gas-liquid separator 600 that exchanges heat
The second refrigerant port 612 on road 610, the gas-liquid separator 600 that exchanges heat heat exchange branch 610 the first refrigerant port 611, second change
Hot device 400, exchange heat gas-liquid separator 600 gas-liquid separation branch 620 refrigerant inlet 621, exchange heat gas-liquid separator 600 gas
Liquid separates the refrigerant exit of the refrigerant exit 622 of branch 620, the refrigerant inlet 710 of gas-liquid separator 700, gas-liquid separator 700
720, it is then return to compressor 100.
When air conditioner circulating system is in refrigeration mode or defrost pattern, as shown in dotted arrow in Fig. 3, refrigerant according to
Lower path flowing: the refrigerant that compressor 100 comes out flows to oil eliminator 200, the second heat exchanger 400, heat exchange gas-liquid separator 600
Heat exchange branch 610 the first refrigerant port 611, heat exchange gas-liquid separator 600 heat exchange branch 610 the second refrigerant port
612, First Heat Exchanger 300, the refrigerant inlet 621 of the gas-liquid separation branch 620 for the gas-liquid separator 600 that exchanges heat, heat exchange gas-liquid point
The refrigerant exit 622 of gas-liquid separation branch 620 from device 600, the refrigerant inlet 710 of gas-liquid separator 700, gas-liquid separator
700 refrigerant exit 720, is then return to compressor 100.
Above-mentioned technical proposal is provided with gas-liquid separator 700, as shown in solid arrow in Fig. 2, when air-conditioning system is in system
When heat pattern is run, from the liquid refrigerants of First Heat Exchanger 300 out continuously across the heat exchange branch of heat exchange gas-liquid separator 600
610, gas-liquid separator 700.By gas-liquid separation twice, separating effect is promoted, and refrigerant band liquid measure greatly reduces, can be effective
Improve the refrigerant solution dehumidification while migration for backing towards compressor 100.
When air-conditioning system is in refrigeration mode and defrost pattern is run, as shown in dotted arrow in Fig. 3, changed from second
Heat exchange branch 610, gas-liquid separator 700 of the liquid refrigerants that hot device 400 comes out continuously across heat exchange gas-liquid separator 600.Through
After gas-liquid separation twice, separating effect is promoted, and refrigerant band liquid measure greatly reduces, and can be effectively improved and be backed towards compressor 100
Refrigerant solution dehumidification while migration.High-temperature liquid state refrigerant using the heat exchange gas-liquid separator 600 with heat exchange function, from condenser out
Heat exchange can be carried out in the heat exchange gas-liquid separator 600 with from the cryogenic gaseous refrigerant come out in evaporator, so that
The temperature of high-temperature liquid state refrigerant reduces, and to increase degree of supercooling, while the temperature of cryogenic gaseous refrigerant is increased, and promotes overheat
Degree, to improve the heat-exchange capacity of air-conditioning system.
Referring to Fig. 1, the air conditioner circulating system further includes four-way valve 800.The first port of the four-way valve 800
810 are connected to the exhaust outlet 110 of the compressor 100, the second port 820 of the four-way valve 800 and the First Heat Exchanger
300 310 connection of the first opening, the third port 830 of the four-way valve 800 and the refrigerant of the gas-liquid separation branch 620 enter
Mouth 621 is connected to, and the 4th port 840 of the four-way valve 800 is connected to the first opening 410 of second heat exchanger 400.Four-way
Valve 800 is used as reversal valve, and four ports may be at following two connected state.
The first, as shown in Fig. 2, the second port of the first port 810 of the four-way valve 800 and the four-way valve 800
820 connections, the third port 830 of the four-way valve 800 are connected to the 4th port 840 of the four-way valve 800.Air-conditioning follows at this time
Loop system is in heating mode operation, refrigerant flow direction are as follows: the refrigerant that compressor 100 comes out flows to oil eliminator 200, four-way valve
800, First Heat Exchanger 300, the heat exchange branch 610 for the gas-liquid separator 600 that exchanges heat, the second heat exchanger 400, heat exchange gas-liquid separator
600 gas-liquid separation branch 620, the refrigerant inlet 710 of gas-liquid separator 700, gas-liquid separator 700 refrigerant exit 720, so
After return to compressor 100.Lubricating oil is carried from the gaseous state high temperature and pressure refrigerant that the exhaust outlet 120 of compressor 100 comes out, is moistened
Lubricating oil is separated in oil eliminator 200, returns in compressor 100 through oil return branch 500.Refrigerant is as condenser
First Heat Exchanger 300 in condensation outwardly heat release is high-temperature liquid state refrigerant, high-temperature liquid state refrigerant removes through the second filter 910
It is miscellaneous, then enter in heat exchange gas-liquid separator 600 through the second electric expansion valve 900, and from the second heat exchanger 400 as evaporator
First opening 410 outflow cryogenic gaseous refrigerant exchange heat, reduce high-temperature liquid state refrigerant temperature, promoted degree of supercooling, together
The temperature of Shi Tisheng cryogenic gaseous refrigerant promotes the degree of superheat.High-temperature gas refrigerant after heat exchange is from heat exchange gas-liquid separator 600
Enter gas-liquid separator 700 after out, eventually passes back in compressor 100.It exchanges heat in gas-liquid separator 600, reduces liquid coolant
Temperature increases degree of supercooling, improves gas coolant temperature, increases the degree of superheat, to promote the ability of air-conditioning system.As it can be seen that it is adopted
With two gas-liquid separators, solve the problems, such as unit spill strip liquid and heat exchange efficiency.
Second, as shown in figure 3, the 4th port of the first port 810 of the four-way valve 800 and the four-way valve 800
840 connections, the second port 820 of the four-way valve 800 are connected to the third port 830 of the four-way valve 800.Air-conditioning follows at this time
Loop system is in refrigeration mode or defrost pattern operation, refrigerant flow to are as follows: the refrigerant that compressor 100 comes out flows to oil eliminator
200, four-way valve 800, the second heat exchanger 400, the heat exchange branch 610 for the gas-liquid separator 600 that exchanges heat, First Heat Exchanger 300, heat exchange
The gas-liquid separation branch 620 of gas-liquid separator 600, the refrigerant inlet 710 of gas-liquid separator 700, gas-liquid separator 700 refrigerant
Outlet 720, is then return to compressor 100.It is carried from the gaseous state high temperature and pressure refrigerant that the exhaust outlet 120 of compressor 100 comes out
There is lubricating oil, lubricating oil is separated in oil eliminator 200, returns in compressor 100 through oil return branch 500.High temperature
It is high-temperature liquid state refrigerant, high-temperature liquid that high-pressure gaseous refrigerant condenses outwardly heat release in the second heat exchanger 400 as condenser
State refrigerant enters in heat exchange gas-liquid separator 600, with 310 outflow of the first opening from the First Heat Exchanger 300 as evaporator
Cryogenic gaseous refrigerant exchange heat, reduce the temperature of high-temperature liquid state refrigerant, promote degree of supercooling, while promoting cryogenic gaseous refrigerant
Temperature, promoted the degree of superheat.High-temperature gas refrigerant after heat exchange enters gas-liquid separation after coming out in heat exchange gas-liquid separator 600
Device 700 eventually passes back in compressor 100.It exchanges heat in gas-liquid separator 600, reduces liquid coolant temperature, increase degree of supercooling, mention
High gas coolant temperature increases the degree of superheat, to promote the ability of air-conditioning system.As it can be seen that it uses two gas-liquid separators, solution
It has determined the problem of unit spill strip liquid and heat exchange efficiency.
It please refers to Fig.1 to Fig.3, the restricting element is the second electric expansion valve 900, institute in one of the embodiments,
State the second opening 320 and the of the heat exchange branch 610 that the second electric expansion valve 900 is set to the First Heat Exchanger 300
Between two refrigerant ports 612.Second refrigerant end of the second opening 320 of the First Heat Exchanger 300 and the heat exchange branch 610
The second electric expansion valve 900 is equipped between mouth 612, the effect of expenditure and pressure may be implemented in the second electric expansion valve 900 of setting.Into
One step is additionally provided with the second filtering between the second opening 320 of the First Heat Exchanger 300 and second electric expansion valve 900
Deimpurity purpose may be implemented in device 910, the second filter 910 of setting.
It please refers to Fig.1 to Fig.3, in one of the embodiments, the second opening 420 of second heat exchanger 400 and institute
It states and is provided with third filter 920 between the first refrigerant port 611 of heat exchange branch 610.Third filter 920 is arranged can be real
Now remove the purpose of impurity in refrigerant.
Above-mentioned air conditioner circulating system, including compressor, oil eliminator, First Heat Exchanger, restricting element, the second heat exchanger with
And oil return branch.Compressor, oil eliminator, First Heat Exchanger and the second heat exchanger forming circuit, the oil return branch of oil return branch
Road entrance is connected to the oil return hole of oil eliminator, and the oil return branch way outlet of oil return branch is connected to the air inlet of compressor, oil return
Branch road is equipped with the adjustable throttling set of aperture.According to different operating conditions, the opening size of throttling set is adjusted, was both protected
Demonstrate,prove unit can normal oil return, and the energy loss of oil return bypass can be reduced, improve unit reliability of operation, while reducing energy
Amount loss.
A kind of air-conditioning, which is characterized in that including air conditioner circulating system provided by any technical solution of the utility model.
A kind of air conditioner oil return control method, using air conditioner circulating system provided by any technical solution of the utility model,
The method for controlling oil return includes:
Set environment temperature preset value T1, T2, T3 ... Tx, x >=4, environment temperature preset value here refer to compressor
Locating outside atmosphere environment temperature.
The actual temperature Ty of the y times detection compressor local environment, y >=1 specifically can use environment temperature temperature-sensitive
Packet detects real atmosphere environment temperature locating for compressor；
Compare the actual temperature Ty and environment temperature preset value T1, T2, T3 ... Tx, according to comparison result, control is adjusted
Save the opening size of valve.Under different atmospheric temperatures, the opening size of regulating valve is different.The compressor of different model is in phase
Under same atmospheric temperature, the opening size of regulating valve may also be different.
Method for controlling oil return in one of the embodiments, further include:
As Tx≤Ty < T (x+1), x >=1, y >=1, the opening size for controlling the regulating valve is Ky.For example detect pressure
Environment temperature T1≤Ty1 < T2 locating for contracting machine, the opening size that controller controls the regulating valve is Ky1, and regulating valve is opened
Degree size is that Ky1 can guarantee that the lubricating oil in oil eliminator rapidly returns back in compressor, while can be avoided and arrange from compressor
The high pressure gaseous refrigerant that port comes out directly returns to the air inlet of compressor by regulating valve, reduces by unnecessary oil return
Energy loss caused by logical.
Above-mentioned method for controlling oil return determines optimal oil return electronic expansion valve opening according to different environment temperatures,
Guarantee the normal oil return of unit, avoids compressor oil starvation from causing to damage, improve the reliability of system.Meanwhile it reducing unnecessary time
Energy loss caused by oil bypass improves the ability and operational reliability of unit.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (10)
1. a kind of air conditioner circulating system, which is characterized in that including compressor (100), oil eliminator (200), First Heat Exchanger
(300), restricting element, the second heat exchanger (400) and oil return branch (500):
The compressor (100), the oil eliminator (200), the First Heat Exchanger (300) restricting element and described
Second heat exchanger (400) forming circuit；
The oil return branch entrance (510) of the oil return branch (500) is connected to the oil return hole of the oil eliminator (200), described
The oil return branch way outlet (520) of oil return branch (500) is connected to the air inlet (120) of the compressor (100), the oil return branch
Road (500) is equipped with the adjustable throttling set of aperture (530).
2. air conditioner circulating system according to claim 1, which is characterized in that the adjustable throttling set of aperture
It (530) is the first electric expansion valve.
3. air conditioner circulating system according to claim 1, which is characterized in that the oil return hole of the oil eliminator is opened with described
It spends between adjustable throttling set (530) and is equipped with first filter (540).
4. air conditioner circulating system according to claim 1, which is characterized in that further include heat exchange gas-liquid separator (600), institute
Stating heat exchange gas-liquid separator (600) includes heat exchange branch (610) and gas-liquid separation branch (620):
First refrigerant port (611) of heat exchange branch (610) and the second opening (420) of second heat exchanger (400)
Connection, the second refrigerant port (612) of heat exchange branch (610) and second opening (320) of the First Heat Exchanger (300)
Connection；
The refrigerant inlet (621) of the gas-liquid separation branch (620) is selectively opened with the first of the First Heat Exchanger (300)
First opening (410) connection of mouth (310) or second heat exchanger (400), the refrigerant of the gas-liquid separation branch (620) go out
Mouth (622) is connected to the air inlet (120) of the compressor (100).
5. air conditioner circulating system according to claim 4, which is characterized in that further include gas-liquid separator (700), the gas
The refrigerant inlet (710) of liquid/gas separator (700) is connected to the refrigerant exit (622) of the gas-liquid separation branch (620), the gas
The refrigerant exit (720) of liquid/gas separator (700) is connected to the air inlet (120) of the compressor (100).
6. air conditioner circulating system according to claim 4, which is characterized in that further include four-way valve (800), the four-way valve
(800) first port (810) is connected to the exhaust outlet (110) of the compressor (100), and the second of the four-way valve (800)
Port (820) is connected to the first opening (310) of the First Heat Exchanger (300), the third port of the four-way valve (800)
(830) it is connected to the refrigerant inlet (621) of the gas-liquid separation branch (620), the 4th port of the four-way valve (800)
(840) it is connected to the first opening (410) of second heat exchanger (400), wherein
The first port (810) of the four-way valve (800) is connected to the second port (820) of the four-way valve (800), and described four
The third port (830) of port valve (800) is connected to the 4th port (840) of the four-way valve (800)；
Alternatively,
The first port (810) of the four-way valve (800) is connected to the 4th port (840) of the four-way valve (800), and described four
The second port (820) of port valve (800) is connected to the third port (830) of the four-way valve (800).
7. air conditioner circulating system according to claim 1, which is characterized in that the restricting element is the second electric expansion valve
(900), the second opening (320) that second electric expansion valve (900) is set to the First Heat Exchanger (300) is changed with described
Between second refrigerant port (612) of hot branch (610).
8. air conditioner circulating system according to claim 7, which is characterized in that the second of the First Heat Exchanger (300) opens
The second filter (910) are additionally provided between mouth (320) and second electric expansion valve (900).
9. air conditioner circulating system according to claim 4, which is characterized in that the second of second heat exchanger (400) opens
Third filter (920) are provided between mouth (420) and the first refrigerant port (611) of heat exchange branch (610).
10. a kind of air-conditioning, which is characterized in that including air conditioner circulating system as in one of claimed in any of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821707946.1U CN208901694U (en) | 2018-10-19 | 2018-10-19 | Air conditioner circulating system and air-conditioning |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821707946.1U CN208901694U (en) | 2018-10-19 | 2018-10-19 | Air conditioner circulating system and air-conditioning |
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| CN208901694U true CN208901694U (en) | 2019-05-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373647A (en) * | 2018-10-19 | 2019-02-22 | 珠海格力电器股份有限公司 | Air conditioner circulating system, air-conditioning and air conditioner oil return control method |
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2018
- 2018-10-19 CN CN201821707946.1U patent/CN208901694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109373647A (en) * | 2018-10-19 | 2019-02-22 | 珠海格力电器股份有限公司 | Air conditioner circulating system, air-conditioning and air conditioner oil return control method |
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