CN208269449U - Straight-expanded geo-source hot-pump system oil return device with dual jet - Google Patents
Straight-expanded geo-source hot-pump system oil return device with dual jet Download PDFInfo
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- CN208269449U CN208269449U CN201820730331.4U CN201820730331U CN208269449U CN 208269449 U CN208269449 U CN 208269449U CN 201820730331 U CN201820730331 U CN 201820730331U CN 208269449 U CN208269449 U CN 208269449U
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Abstract
The utility model relates to technical field of ground source heat pump, a kind of straight-expanded geo-source hot-pump system oil return device with dual jet is disclosed, which includes compressor, oil eliminator, condenser/gas cooler, Intermediate Heat Exchanger, the first injector, gas-liquid separator, the first solenoid valve, the second injector, second solenoid valve, throttle valve, underground heat exchanger, oil return pipe, fuel level sensor and controller.The utility model is by ejector applications in straight-expanded geo-source hot-pump system, the high-pressure refrigerant working medium that Intermediate Heat Exchanger exports under oil return operating condition is collected in the liquid lubricant in the U-shaped elbow of oil return pipe by the second injector injection, in the case where not increasing external input function, so that lubricating oil smoothly returns to compressor, it not only can solve compressor problem of oil return of the straight-expanded geo-source hot-pump system under supplying thermal condition, restriction loss can also be reduced, compressor input work is saved, and is suitable for all refrigerant working medium.
Description
Technical field
The utility model relates to technical field of ground source heat pump, and more specifically, it relates to a kind of straight-expanded geo-source hot-pump systems
The oil return apparatus of system.
Background technique
In the northern area of China, it is building energy consumption that winter cities and towns heating energy consumption, which accounts for the 40% of national town building energy consumption,
Chief component.On heating system, central heating and cogeneration of heat and power, the fuel used predominantly fire coal of the two are mainly used.
And the heating system based on fire coal not only consumes a large amount of coal resource, also creates serious environmental pollution.Therefore, it develops
Clean, efficient, energy-efficient renewable energy heating technology is particularly important.And as a kind of novel across season storage of geologic body
Can energy using technology, straight-expanded geo-source hot-pump technology have both cleaning, it is efficient and energy saving many advantages, such as.
Straight-expanded geo-source hot-pump system is directly to be embedded in copper pipe loop in underground, is flowed in refrigerant work therein
It is upright to connect and soil or underground water heat exchange.Under supplying thermal condition, the copper pipe (also referred to as the underground heat exchanger, generally U that are embedded in soil
Type pipe) it can be used as the evaporator of heat pump system, refrigerant working medium evaporation endothermic directly in the heat exchanger of underground.Since underground exchanges heat
There are phase transition process in device, therefore the coefficient of heat transfer greatly improves, this is but also system effectiveness is promoted.But it heats in winter
Under operating condition, the lubricating oil of compressor can enter in the heat exchanger of underground with liquid refrigerant working medium in system operation, liquid
State refrigerant working medium absorbs soil or the heat of underground water is changed into gaseous state, and lubricating oil still keeps liquid.Since liquid lubricates
Oil density is much larger than gaseous refrigerant density, therefore refrigerant vapour is difficult in underground heat exchanger rising standpipe under the effect of gravity
It carries lubricating oil to rise, especially when the refrigerant vapour flow velocity in rising standpipe is smaller, this results in most of lubricating oil
It is stranded in the U-shaped curved bottom of underground heat exchanger.The presence of lubricating oil not only increases flow resistance, impairs underground heat exchange mistake
Journey.Meanwhile with the continuous operation of system, the lubricating oil for being stranded in underground exchanger base is more and more, and in compressor
Lubricating oil is fewer and fewer, causes compressor oil return difficulty, wasted work to increase, the system of eventually leading to is not normally functioning, compressor pole
It is easy to damage.
For the compressor oil return difficult problem in straight-expanded geo-source hot-pump system, main solution has at this stage:
1) oil return bend is set at a certain distance on the rising standpipe of underground heat exchanger, using freezing in oil return bend
The biggish flow velocity of agent working medium promotes lubricating oil reflux.But when system continuous operation under low load condition, in the heat exchanger of underground
Refrigerant flow rates are lower, and compressor problem of oil return is still unable to get solution.In addition, when underground in straight-expanded geo-source hot-pump system
When the riser length of heat exchanger reaches up to a hundred meters, the setting of multiple oil return bends must be brought not to the manufacturing process of underground heat exchanger
Just；
2) oil eliminator is set in compressor outlet, reduces the amount for entering lubricating oil in the heat exchanger of underground, but this method is only
The speed that lubricating oil can be delayed to assemble in underground exchanger base can not fundamentally solve problem of oil return.Furthermore work as refrigerant
When working medium is carbon dioxide, it is generally supercritical fluid in compressor outlet carbon dioxide, in this state, carbon dioxide and profit
The intermiscibility of lubricating oil is preferable, and the effect of oil eliminator is unobvious；
3) high-pressure refrigerant after compressor outlet throttling introduces underground heat exchanger, will be stranded in underground using pressure difference and change
The lubricating oil refunds compressor of hot device bottom.This method has certain feasibility, but restriction loss is larger, and system effectiveness is not high,
It is particularly unsuitable for carbon dioxide straight-expanded geo-source hot-pump system.
It can be seen that the oil return apparatus of above-mentioned existing straight-expanded geo-source hot-pump system is in structure, method and use condition
On still have defect and limitation, therefore research and develop a kind of oil return apparatus of novel straight-expanded geo-source hot-pump system, it made not only
Compressor problem of oil return of the straight-expanded geo-source hot-pump system under supplying thermal condition is solved, restriction loss can be also reduced, saves compression
Machine input work, and do not limited by refrigerant category, it has also become the top priority in current straight-expanded geo-source hot-pump field.
Utility model content
In view of the above-mentioned drawbacks of the prior art with limitation, the utility model provides a kind of direct-expansion type with dual jet
Ground-source heat pump system oil return apparatus not only can solve compressor oil return of the straight-expanded geo-source hot-pump system under supplying thermal condition and ask
Topic can also reduce restriction loss, save compressor input work, and be suitable for all refrigerant working medium.
In order to solve the above-mentioned technical problem, the utility model is achieved especially by technical solution below:
A kind of straight-expanded geo-source hot-pump system oil return device with dual jet, including compressor (1), oil eliminator (2),
Condenser/gas cooler (3), Intermediate Heat Exchanger (4), the first injector (5), gas-liquid separator (6), the first solenoid valve (7),
Second injector (8), second solenoid valve (9), throttle valve (10), underground heat exchanger (11), oil return pipe (12), fuel level sensor
(13), controller (14), low temperature refrigerating medium working medium outlet (101) and high temperature refrigerating medium working medium inflow entrance (102)；
The outlet of the compressor (1) is connect with the entrance of the oil eliminator (2), the outlet of the oil eliminator (2)
It is connect with the refrigerant working medium side entrance of the condenser/gas cooler (3), the system of the condenser/gas cooler (3)
Cryogen working medium side outlet is connect with the high-pressure working medium side entrance of the Intermediate Heat Exchanger (4), the high pressure of the Intermediate Heat Exchanger (4)
Working medium side outlet is connect with the entrance of the Working-fluid intaking of first injector (5) and first solenoid valve (7), institute
The outlet for stating the first injector (5) is connect with the entrance of the gas-liquid separator (6), and the gas of the gas-liquid separator (6) goes out
Mouthful connect with the low pressure working fluid side entrance of the Intermediate Heat Exchanger (4), the low pressure working fluid side outlet of the Intermediate Heat Exchanger (4) and
The entrance of the compressor (1) connects；The working fluid of the outlet of first solenoid valve (7) and second injector (8)
Entrance connection, the outlet of second injector (8) are connect with the entrance of the second solenoid valve (9), the second solenoid valve
(9) outlet is connect with the low pressure working fluid side entrance of the Intermediate Heat Exchanger (4)；The liquid outlet of the gas-liquid separator (6)
It is connect with the entrance of the throttle valve (10), the entrance of the outlet of the throttle valve (10) and the underground heat exchanger (11) connects
It connects, the outlet of the underground heat exchanger (11) is connect with the driving fluid entrance of first injector (5)；The oil return pipe
(12) entrance is connect with the bottom of the underground heat exchanger (11), the outlet of the oil return pipe (12) and second injector
(8) driving fluid entrance connection；The low temperature refrigerating medium working medium outlet (101) and the condenser/gas cooler (3)
The connection of refrigerating medium working medium side entrance, the refrigerating medium working medium side outlet of the condenser/gas cooler (3) and the high temperature carry
Cryogen working medium inflow entrance (102) connection；
The oil level signal that the fuel level sensor (13) is used to measure the oil level of the compressor (1), and is measured passes
It passs the controller (14), whether the controller (14) judges the oil level of the fuel level sensor (13) feedback in the pressure
Within the scope of the normal oil level of contracting machine (1), and first solenoid valve (7) and the second solenoid valve are controlled according to judging result
(9) on-off.
Preferably, the underground heat exchanger (11) and the oil return pipe (12) are U-shaped structure, the oil return pipe (12)
Entrance is connect with the U-shaped elbow lowest point of the underground heat exchanger (11).
Preferably, the underground heat exchanger (11) and the oil return pipe (12) are vertically embedded in soil.
Preferably, the diameter of the oil return pipe (12) is less than the diameter of the underground heat exchanger (11), so that the oil return
Pipe (12) is in the velocity in pipes under the diameter within the scope of 8-12m/s.
Preferably, it carries on the back the outlet that the outlet back pressure design value of first injector (5) is equal to second injector (8)
Press design value.
Preferably, the normal oil level range of the compressor (1) is 1/3-2/3 full oil level.
Preferably, the straight-expanded geo-source hot-pump system oil return device with dual jet is suitable for existing all refrigeration
Agent is in the straight-expanded geo-source hot-pump system of working medium.
It is further preferable that the straight-expanded geo-source hot-pump system oil return device with dual jet is straight suitable for carbon dioxide
Expanded geo-source hot-pump system.
The beneficial effects of the utility model are:
(1) the utility model is directed to the shortcomings and deficiencies of existing oil return apparatus, and injector is arranged in systems, utilizes spray
Principle is penetrated, compressor problem of oil return is solved in the case where not increasing external input function, guarantees that system is normal under supplying thermal condition
Continuous service；
(2) underground heat exchanger and oil return pipe are vertically embedded in soil by the utility model, and by the entrance of oil return pipe with
The lowest point of the U-shaped elbow of underground heat exchanger connects, and so using the U-shaped curved collector as lubricating oil of oil return pipe, reduces
The lubricants capacity of underground exchanger base is accumulated in, to improve the heat exchange efficiency of underground heat exchanger；
(3) oil return pipe is set thinner U-tube by the utility model, and the flow velocity in oil return pipe can be improved, to promote
Oil return；
(4) the utility model recycles the part kinetic energy of refrigerant working medium expansion process using injector, while saving compression
Machine input work reduces restriction loss, so that system effectiveness is promoted；
(5) the utility model is suitable for the straight-expanded geo-source hot-pump system using existing all refrigerants as working medium, especially
Suitable for carbon dioxide straight-expanded geo-source hot-pump system；
(6) the utility model utilizes condenser/gas cooler outlet refrigerant waste-heat by Intermediate Heat Exchanger
The refrigerant of compressor inlet, guarantees the degree of superheat of refrigerant, so that refrigerant drop be avoided to enter compressor and liquid occurs
Hit phenomenon.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the straight-expanded geo-source hot-pump system oil return device with dual jet of the utility model；
Fig. 2 is the straight-expanded geo-source hot-pump system oil return device with dual jet of the utility model under supplying thermal condition
Schematic diagram；
Wherein: arrow indicates Working fluid flow direction.
In above-mentioned figure: 1, compressor；2, oil eliminator；3, condenser/gas cooler；4, Intermediate Heat Exchanger；5, first
Injector；6, gas-liquid separator；7, the first solenoid valve；8, the second injector；9, second solenoid valve；10, throttle valve；11, underground
Heat exchanger；12, oil return pipe；13, fuel level sensor；14, controller；101, low temperature refrigerating medium working medium outlet；102, high temperature carries
Cryogen working medium inflow entrance.
Specific embodiment
The utility model is described in further detail below by specific embodiment, following embodiment can make this
The utility model is more completely understood in professional technician, but does not limit the utility model in any way.
As shown in Figure 1, present embodiment discloses a kind of straight-expanded geo-source hot-pump system oil return device with dual jet, packet
Include compressor 1, oil eliminator 2, condenser/gas cooler 3, Intermediate Heat Exchanger 4, the first injector 5, gas-liquid separator 6,
One solenoid valve 7, the second injector 8, second solenoid valve 9, throttle valve 10, underground heat exchanger 11, oil return pipe 12, fuel level sensor
13, controller 14, low temperature refrigerating medium working medium outlet 101, high temperature refrigerating medium working medium inflow entrance 102.
Wherein, underground heat exchanger 11 and oil return pipe 12 are embedded in underground, and remaining part is respectively positioned on ground or more.
Wherein, condenser/gas cooler 3 is the fluid heated in another lateral line with the fluid in a lateral line, this
The two sides of condenser/gas cooler 3 are referred to as refrigerant working medium side and refrigerating medium working medium side in scheme.
Wherein, Intermediate Heat Exchanger 4 is the refrigerant work heated in another lateral line with the refrigerant working medium in a lateral line
The two sides of Intermediate Heat Exchanger 4 are referred to as high-pressure working medium side and low pressure working fluid side in this programme by matter.
Wherein, the first injector 5 and the second injector 8 be all with the driving fluid of the working fluid injection low pressure of high pressure,
And it is mixed into pressure fluid placed in the middle in injector outlet, the high pressure fluid entrances of injector and low-pressure fluid are entered in this programme
Mouth is referred to as Working-fluid intaking and driving fluid entrance.
The outlet of compressor 1 is connect with the entrance of oil eliminator 2, the outlet of oil eliminator 2 and condenser/gas cooler
3 refrigerant working medium side entrance connection, the refrigerant working medium side outlet of condenser/gas cooler 3 and the height of Intermediate Heat Exchanger 4
Press the connection of working medium side entrance, the Working-fluid intaking of the high-pressure working medium side outlet of Intermediate Heat Exchanger 4 and the first injector 5 and the
The entrance of one solenoid valve 7 connects, and the outlet of the first injector 5 is connect with the entrance of gas-liquid separator 6, the gas of gas-liquid separator 6
Body outlet is connect with the low pressure working fluid side entrance of Intermediate Heat Exchanger 4, the low pressure working fluid side outlet and compressor 1 of Intermediate Heat Exchanger 4
Entrance connection.The outlet of first solenoid valve 7 is connect with the Working-fluid intaking of the second injector 8, the outlet of the second injector 8
It is connect with the entrance of second solenoid valve 9, the outlet of second solenoid valve 9 is connect with the low pressure working fluid side entrance of Intermediate Heat Exchanger 4.Gas
The liquid outlet of liquid/gas separator 6 is connect with the entrance of throttle valve 10, and the outlet of throttle valve 10 and the entrance of underground heat exchanger 11 connect
It connects, the outlet of underground heat exchanger 11 is connect with the driving fluid entrance of the first injector 5.The entrance of oil return pipe 12 and underground exchange heat
The bottom of device 11 connects, and the outlet of oil return pipe 12 is connect with the driving fluid entrance of the second injector 8.Low temperature refrigerating medium working medium row
Outlet 101 is connect with the refrigerating medium working medium side entrance of condenser/gas cooler 3, the refrigerating medium of condenser/gas cooler 3
Working medium side outlet is connect with high temperature refrigerating medium working medium inflow entrance 102.
Fuel level sensor 13 is used to measure the oil level of compressor 1, and the oil level signal measured passes to controller 14,
Controller 14 judges the normal oil level range (1/3-the 2/ whether oil level of the fuel level sensor 13 feedback is arranged in the compressor 1
3 full oil levels) in, and according to the on-off of judging result the first solenoid valve 7 and second solenoid valve 9 of control, to realize oil return operating condition
Start and stop.
Underground heat exchanger 11 and oil return pipe 12 are disposed as U-shaped structure, and are vertically embedded in soil.Oil return pipe 12 enters
Mouthful connect with the U-shaped elbow lowest point of underground heat exchanger 11, so can by the U-shaped curved as lubricant trap of oil return pipe 12,
Reduce the lubricants capacity for accumulating in underground exchanger base.The U-shaped elbow lowest point of oil return pipe 12 is lower than the U of underground heat exchanger 11
Type elbow lowest point, and the U-shaped elbow lowest point of oil return pipe 12 and the U-shaped elbow lowest point of underground heat exchanger 11 have centainly
Difference in height, which is designed as 1-1.5 times of 11 two standpipe tube spacing of underground heat exchanger, both can guarantee so certain
Lubricating oil collecting amount, and can guarantee that oil return pipe 12 is unlikely to fitting depth that is too long and influencing underground heat exchanger 11.
The diameter of oil return pipe 12 is less than the diameter of underground heat exchanger 11 to improve 12 velocity in pipes of oil return pipe, to promote back
Oil.It is 8-12m/s straight as design current velocity progress oil return pipe 12 using flow velocity in oil return pipe 12 when choosing the diameter of oil return pipe 12
The design of diameter calculates.
It is calculated with the design that aerodynamics method carries out the first injector 5 and the second injector 8, wherein the first injector
5 outlet back pressure design value be equal to the second injector 8 outlet back pressure design value, to avoid under oil return operating condition from second solenoid valve
With the refrigerant vapour flowed out from the gas vent of gas-liquid separator 6 mutually adverse current occurs for the fluid of 9 outlet outflow.
The utility model additionally provides the oil return side of the above-mentioned straight-expanded geo-source hot-pump system oil return device with dual jet
Method, under supplying thermal condition, the lubricating oil that can not be carried secretly by refrigerant vapour and be back to compressor 1 is built up under the effect of gravity
In the U-shaped elbow of oil return pipe 12.With the operation of system, the lubricating oil for accumulating in 12 bottom of oil return pipe is more and more, and presses
Lubricating oil in contracting machine 1 is fewer and fewer, when the oil level that fuel level sensor 13 is measured to compressor 1 is reduced to the 1/3 of full oil level,
Controller 14 determines the oil level for the minimum oil level of compressor 1, and controller 14 opens the first solenoid valve 7 and second solenoid valve 9, is
System enters oil return operating condition, and the lubricating oil being collected in the U-shaped elbow of oil return pipe 12 returns under the ejector action of the second injector 8
To compressor.Under oil return operating condition, the oil level of compressor 1 is gradually increasing, when the oil level that fuel level sensor 13 is measured to compressor 1 arrives
Up to full oil level 2/3 when, controller 14 closes the first solenoid valve 7 and second solenoid valve 9, the second injector 8 and stops working, oil return
Operating condition terminates.
As shown in Fig. 2, a kind of straight-expanded geo-source hot-pump system oil return dress with dual jet provided by the utility model
The working principle set is as follows:
Fuel level sensor 13 monitors the oil level of compressor 1 always, and measured oil level signal is passed to controller 14.
Under the supplying thermal condition without oil return, controller 14 controls the first solenoid valve 7 and second solenoid valve 9 disconnects.
The high-temperature high-pressure refrigerant that compressor 1 exports enters oil eliminator 2 and isolates parts of lubricating oil, through oil eliminator 2
The high-temperature high-pressure refrigerant that lubrication oil content reduces afterwards enters the refrigerant working medium side of condenser/gas cooler 3, carries in low temperature
Cryogen working medium acts on lower condensation/cooling, and temperature reduces, and the high-pressure refrigerant for being condensed/cooling down enters the high pressure of Intermediate Heat Exchanger 4
Working medium side discharges the refrigerant of waste-heat low pressure working fluid side, and the high-pressure refrigerant flowed out after cooling from Intermediate Heat Exchanger 4 flows into
Low-pressure refrigerant vapor of first injector, 5 injection in underground heat exchanger 11, the different refrigerant of two bursts of pressure is first
It is mixed into pressure fluid placed in the middle in injector 5 and flows out the first injector 5, completes gas-liquid separation after gas-liquid separator 6.From gas
The refrigerant vapour of the gas vent outflow of liquid/gas separator 6 flows into the low pressure working fluid side of Intermediate Heat Exchanger 4, is heated to form overheat and steams
Compressor 1 is flow back into after gas.The liquid refrigerant flowed out from the liquid outlet of gas-liquid separator 6 is after 10 decrease temperature and pressure of throttle valve
Underground heat exchanger 11 is flowed into, becomes refrigerant vapour after the heat of soil or underground water is absorbed in underground heat exchanger 11, this is low
Compression refrigerant steam is sucked back in the first injector 5 under the ejector action of the first injector 5.
Under operating condition described above, compressor lubricant oil constantly enters underground and changes with circulating for refrigerant working medium
In hot device 11, the lubricating oil being stranded in underground heat exchanger 11 is flowed under the influence of gravity into the U-shaped elbow of 12 bottom of oil return pipe.
With the continuous operation of system, the oil level in compressor 1 is constantly reduced, and the lubricating oil for accumulating in 12 bottom of oil return pipe constantly increases
Add.When the oil level that fuel level sensor 13 is measured to compressor 1 is reduced to the 1/3 of full oil level, controller 14 determines that the oil level is
The minimum oil level of compressor 1, controller 14 opens the first solenoid valve 7 at this time and second solenoid valve 9, system enter oil return operating condition.
The partial high pressure refrigerant flowed out from Intermediate Heat Exchanger 4 is collected in oil return pipe into 8 injection of the second injector through the first solenoid valve 7
Lubricating oil in 12 U-shaped elbow, lubricating oil and high-pressure refrigerant flow out the second injector 8 after mixing in the second injector 8,
The low pressure working fluid side for flowing into Intermediate Heat Exchanger 4 through second solenoid valve 9 again, is heated to form superheated vapor in Intermediate Heat Exchanger 4
Refrigerant is back to compressor 1 together with lubricating oil, so realizes compressor oil return.Under oil return operating condition, the oil level of compressor 1 by
Gradually rise, when the oil level that fuel level sensor 13 is measured to compressor 1 reaches the 2/3 of full oil level, controller 14 closes the first electricity
Magnet valve 7 and second solenoid valve 9, the second injector 8 stop working, and oil return operating condition terminates.
Although being described above in conjunction with preferred embodiment of the attached drawing to the utility model, the utility model is not
It is confined to above-mentioned specific embodiment, the above mentioned embodiment is only schematical, is not restrictive, ability
The those of ordinary skill in domain is not departing from present inventive concept and scope of the claimed protection under the enlightenment of the utility model
In the case of, the specific transformation of many forms can also be made, these are belonged within the protection scope of the utility model.
Claims (8)
1. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet, which is characterized in that including compressor (1), oil
Separator (2), condenser/gas cooler (3), Intermediate Heat Exchanger (4), the first injector (5), gas-liquid separator (6), first
Solenoid valve (7), the second injector (8), second solenoid valve (9), throttle valve (10), underground heat exchanger (11), oil return pipe (12), oil
Level sensor (13), controller (14), low temperature refrigerating medium working medium outlet (101) and high temperature refrigerating medium working medium inflow entrance (102)；
The outlet of the compressor (1) is connect with the entrance of the oil eliminator (2), the outlet of the oil eliminator (2) and institute
State the refrigerant working medium side entrance connection of condenser/gas cooler (3), the refrigerant of the condenser/gas cooler (3)
Working medium side outlet is connect with the high-pressure working medium side entrance of the Intermediate Heat Exchanger (4), the high-pressure working medium of the Intermediate Heat Exchanger (4)
Side outlet is connect with the entrance of the Working-fluid intaking of first injector (5) and first solenoid valve (7), and described
The outlet of one injector (5) is connect with the entrance of the gas-liquid separator (6), the gas vent of the gas-liquid separator (6) with
The low pressure working fluid side entrance of the Intermediate Heat Exchanger (4) connects, the low pressure working fluid side outlet of the Intermediate Heat Exchanger (4) with it is described
The entrance of compressor (1) connects；The Working-fluid intaking of the outlet of first solenoid valve (7) and second injector (8)
Connection, the outlet of second injector (8) are connect with the entrance of the second solenoid valve (9), the second solenoid valve (9)
Outlet is connect with the low pressure working fluid side entrance of the Intermediate Heat Exchanger (4)；The liquid outlet of the gas-liquid separator (6) with it is described
The entrance of throttle valve (10) connects, and the outlet of the throttle valve (10) is connect with the entrance of the underground heat exchanger (11), described
The outlet of underground heat exchanger (11) is connect with the driving fluid entrance of first injector (5)；Oil return pipe (12) enter
Mouth is connect with the bottom of the underground heat exchanger (11), the outlet of the oil return pipe (12) and drawing for the second injector (8)
The connection of jet body entrance；The refrigerating of the low temperature refrigerating medium working medium outlet (101) and the condenser/gas cooler (3)
The connection of agent working medium side entrance, the refrigerating medium working medium side outlet of the condenser/gas cooler (3) and the high temperature refrigerating medium work
Mass flow entrance (102) connection；
The fuel level sensor (13) is used to measure the oil level of the compressor (1), and the oil level signal measured passes to
Whether the controller (14), the controller (14) judge the oil level of the fuel level sensor (13) feedback in the compressor
(1) within the scope of normal oil level, and first solenoid valve (7) and the second solenoid valve (9) are controlled according to judging result
On-off.
2. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 1, feature exist
In the underground heat exchanger (11) and the oil return pipe (12) are U-shaped structure, the entrance and the well of the oil return pipe (12)
The U-shaped elbow lowest point of lower heat exchanger (11) connects.
3. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 1, feature exist
In the underground heat exchanger (11) and the oil return pipe (12) are vertically embedded in soil.
4. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 1, feature exist
In the diameter of the oil return pipe (12) is less than the diameter of the underground heat exchanger (11), so that the oil return pipe (12) is straight at this
Velocity in pipes under diameter is within the scope of 8-12m/s.
5. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 1, feature exist
In the outlet back pressure design value of first injector (5) is equal to the outlet back pressure design value of second injector (8).
6. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 1, feature exist
In the normal oil level range of the compressor (1) is 1/3-2/3 full oil level.
7. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 1, feature exist
In the straight-expanded geo-source hot-pump system oil return device with dual jet is suitable for using existing all refrigerants as the straight of working medium
In expanded geo-source hot-pump system.
8. a kind of straight-expanded geo-source hot-pump system oil return device with dual jet according to claim 7, feature exist
In the straight-expanded geo-source hot-pump system oil return device with dual jet is suitable for carbon dioxide straight-expanded geo-source hot-pump system
System.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820730331.4U CN208269449U (en) | 2018-05-16 | 2018-05-16 | Straight-expanded geo-source hot-pump system oil return device with dual jet |
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| CN201820730331.4U CN208269449U (en) | 2018-05-16 | 2018-05-16 | Straight-expanded geo-source hot-pump system oil return device with dual jet |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108571835A (en) * | 2018-05-16 | 2018-09-25 | 天津大学 | Straight-expanded geo-source hot-pump system oil return device with dual jet and its oil return method |
| CN110513918A (en) * | 2019-09-30 | 2019-11-29 | 珠海格力电器股份有限公司 | The reliable injection oil return of injection oil return effect takes liquid structure and air-conditioning system |
| CN112013561A (en) * | 2019-05-30 | 2020-12-01 | 浙江盾安机电科技有限公司 | Total heat recovery refrigerating system |
| CN113669936A (en) * | 2021-07-06 | 2021-11-19 | 北京国家速滑馆经营有限责任公司 | Oil return system for carbon dioxide transcritical refrigeration system |
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2018
- 2018-05-16 CN CN201820730331.4U patent/CN208269449U/en active Active - Reinstated
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571835A (en) * | 2018-05-16 | 2018-09-25 | 天津大学 | Straight-expanded geo-source hot-pump system oil return device with dual jet and its oil return method |
| CN112013561A (en) * | 2019-05-30 | 2020-12-01 | 浙江盾安机电科技有限公司 | Total heat recovery refrigerating system |
| CN112013561B (en) * | 2019-05-30 | 2022-08-12 | 浙江盾安机电科技有限公司 | Total heat recovery refrigerating system |
| CN110513918A (en) * | 2019-09-30 | 2019-11-29 | 珠海格力电器股份有限公司 | The reliable injection oil return of injection oil return effect takes liquid structure and air-conditioning system |
| CN113669936A (en) * | 2021-07-06 | 2021-11-19 | 北京国家速滑馆经营有限责任公司 | Oil return system for carbon dioxide transcritical refrigeration system |
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