CN209027150U - A kind of automatic oil return gas engine heat pump system - Google Patents
A kind of automatic oil return gas engine heat pump system Download PDFInfo
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- CN209027150U CN209027150U CN201821697579.1U CN201821697579U CN209027150U CN 209027150 U CN209027150 U CN 209027150U CN 201821697579 U CN201821697579 U CN 201821697579U CN 209027150 U CN209027150 U CN 209027150U
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- oil return
- oil
- refrigerant
- pipe
- pressure sensor
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Abstract
The utility model discloses a kind of automatic oil return gas engine heat pump systems, including refrigerant-cycle systems and automatic oil return system；The refrigerant-cycle systems include compressor, oil eliminator, vapour liquid separator, double-tube heat exchanger, radiator, four-way valve, drier, indoor heat exchanger and electric expansion valve；The automatic oil return system includes oil eliminator, oil return pipe, check valve, return pressure sensor, exhaust high pressure sensor, exhaust gas temperature sensor, suction temperature sensor, low inspiratory pressure sensor, oil return capillary, oil return switch valve and returning-oil temperature sensor.The system structure simple and stable of the utility model, it can be ensured that the reliability of oil return, when preventing compressor start, compressor air suction mouth gathers a large amount of refrigeration oils, the performance of compressor is influenced, to improve the overall performance of heat pump unit.
Description
Technical field
The utility model relates to gas engine heat pump systems, and in particular to a kind of automatic oil return gas engine heat pump system.
Background technique
Heat pump air conditioning system heated under operating condition in winter have the characteristics that it is energy-efficient, with energy and environment dual-pressure
Exacerbation, the technology application be increasingly taken seriously.Wherein, combustion-gas thermal pump air-conditioning system is one kind using natural gas as fuel,
The important distribution formula energy resource system for directly compressor in heat pump air conditioner unit being driven to work by sending out combustion gas motivation.Combustion gas
Heat pump air conditioning system can meet the needs of people are to air conditioning applications well, and have good energy conservation and environmental protection characteristic.In recent years
Come, the accounting utilized with natural gas energy resource constantly increases, and China is to the research of the technology and using also pay attention to day by day.
Heat pump unit by engine by belt wheel drive compressor operating, compressor during operating, refrigerant and
The lubricating oil of compressor mixes, and lubricating oil is flowed with the flowing of refrigerant, when lubricating oil is from exhaust outlet of compressor
It is discharged and separates not in time oil return, the work of compressor oil starvation, lubrication refrigeration oil largely accumulates in evaporator and condenser again,
The working performance of refrigeration system has been severely impacted in this way, so can system timely and effectively accomplish the separation of refrigeration oil and return
It is very important for oil.
Utility model content
In view of the deficiencies of the prior art, the utility model discloses a kind of automatic oil return gas engine heat pump system, can either realize
The automatic back flow of compressor lubricant oil, and can judge whether oil return is normal according to returning-oil temperature and pressure.
To achieve the above object, the technical solution of the utility model is:
A kind of automatic oil return gas engine heat pump system, including refrigerant-cycle systems and automatic oil return system；
The refrigerant-cycle systems include compressor, oil eliminator, vapour liquid separator, double-tube heat exchanger, radiator,
Four-way valve, drier, indoor heat exchanger and electric expansion valve；The exhaust outlet of compressor passes through discharge refrigerant pipe and oil eliminator
Entrance connection, the first port of the refrigerant outlet of oil eliminator and four-way valve connects, and the second port of four-way valve successively passes through
One end connection of double-tube heat exchanger, radiator, drier, electric expansion valve and indoor heat exchanger, the other end of indoor heat exchanger
It is connect with the third port of four-way valve, the 4th port of four-way valve and the entrance of vapour liquid separator connect, and vapour liquid separator goes out
Mouth is connected by the air entry of refrigerant suction pipe and compressor；
The automatic oil return system includes oil eliminator, oil return pipe, check valve, return pressure sensor, exhaust high pressure
Sensor, exhaust gas temperature sensor, suction temperature sensor, low inspiratory pressure sensor, oil return capillary, oil return switch valve and return
Oil temperature sensor；One end of oil return pipe is connect with the oil outlet of oil eliminator bottom, and the other end is connected to refrigerant suction pipe
On, check valve, oil return switch valve, oil return capillary, return pressure sensor and returning-oil temperature sensor streamwise are successively
It is arranged on oil return pipe；Exhaust high pressure sensor and exhaust gas temperature sensor are arranged on the exhaust pipe of compressor, suction temperature
Sensor and low inspiratory pressure sensor are arranged on refrigerant suction pipe, and are located at oil return pipe and refrigerant suction pipe junction
Downstream.
Further, vibration absorbing hose is provided on the refrigerant suction pipe and discharge refrigerant pipe.
Exhaust high pressure sensor and exhaust gas temperature sensor is arranged in the utility model on discharge refrigerant pipe, in refrigerant
Suction temperature sensor and low inspiratory pressure sensor are set on air intake duct, oil return switch valve, oil return capillary are set on oil return pipe
Pipe, return pressure sensor and returning-oil temperature sensor, in the gas-fired heat pump course of work, by comparing the detection of each sensor
Value, judges whether system oil return is normal, to provide the oil return of stable and uniform for compressor, guarantees system worked well.With it is existing
There is technology to compare, the beneficial effect is that:
1, system structure simple and stable, it is ensured that the reliability of oil return；
2, it when oil return pipe occurs abnormal, can feed back in advance in unit allocation letter, adjust or increase turning for compressor in time
Speed；
3, when preventing compressor start, compressor air suction mouth gathers a large amount of refrigeration oils, influences the performance of compressor；
4, refrigeration oil can be made seldom to retain in other components, improves the entirety of heat pump unit.
Detailed description of the invention
Fig. 1 is the principle assumption diagram of the utility model automatic oil return gas engine heat pump system.
Description of symbols: 1- gas engine；2- compressor；3- driving belt；4- oil eliminator；5- oil return pipe；6-
Check valve；7- return pressure sensor；8- vapour liquid separator；9- vibration absorbing hose；10- refrigerant suction pipe；11- is vented high pressure and passes
Sensor；12- exhaust gas temperature sensor；13- suction temperature sensor；14- low inspiratory pressure sensor；15- oil return capillary；16-
Oil return switch valve；17- double-tube heat exchanger；18- radiator；19- four-way valve；20- drier；21- indoor heat exchanger；22- electronics
Expansion valve；23- returning-oil temperature sensor；24- discharge refrigerant pipe.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing and have
Body embodiment is described in further detail the utility model.
It please refers to shown in Fig. 1, a kind of automatic oil return gas engine heat pump system, mainly includes heat pump air conditioning system, automatic oil return
System and matched control system.Wherein, heat pump air conditioning system is refrigerant-cycle systems, has refrigeration and heat-production functions.
Automatic oil return system provides the oil return of stable and uniform for compressor, guarantees that its is working properly.
Refrigerant-cycle systems include gas engine 1, compressor 2, driving belt 3, oil eliminator 4, vapour liquid separator
8, vibration absorbing hose 9, refrigerant suction pipe 10, double-tube heat exchanger 17, radiator 18, four-way valve 19, drier 20, indoor heat exchanger
21, electric expansion valve 22 and discharge refrigerant pipe 24, vibration absorbing hose 9 is as refrigerant suction pipe 10 and discharge refrigerant pipe 24
A part.Automatic oil return system includes oil eliminator 4, oil return pipe 5, check valve 6, return pressure sensor 7, exhaust high pressure sensing
Device 11, exhaust gas temperature sensor 12, suction temperature sensor 13, low inspiratory pressure sensor 14, oil return capillary 15, oil return switch
Valve 16 and returning-oil temperature sensor 23, each sensor are connect with control system.
The exhaust outlet of compressor 2 is connect by discharge refrigerant pipe 24 with the entrance of oil eliminator 4, the system of oil eliminator 4
Cryogen outlet is connect with the first port of four-way valve 19, and the second port of four-way valve 19 is successively through double-tube heat exchanger 17, radiator
18, drier 20, electric expansion valve 22 are connect with one end of indoor heat exchanger 21, the other end and four-way valve of indoor heat exchanger 21
19 third port connection, the 4th port of four-way valve 19 are connect with the entrance of vapour liquid separator 8, the outlet of vapour liquid separator 8
It is connect by refrigerant suction pipe 10 with the air entry of compressor.
One end of oil return pipe 5 is connect with the oil outlet of 4 bottom of oil eliminator, and the other end is successively switched through check valve 6, oil return
Valve 16, oil return capillary 15, return pressure sensor 7 and returning-oil temperature sensor 23 are connect with refrigerant suction pipe 10；Exhaust
High pressure sensor 11 and exhaust gas temperature sensor 12 are arranged on discharge refrigerant pipe 24, and suction temperature sensor 13 is low with air-breathing
Pressure sensor 14 is arranged on refrigerant suction pipe 10, and is located at the downstream of oil return pipe 5 and 10 junction of refrigerant suction pipe.
A kind of working principle of automatic oil return gas engine heat pump system of the present embodiment is illustrated below, refrigerant circulation
There are two types of operating modes, are divided into refrigeration mode and heating mode:
Under refrigeration mode, gas engine 1 directly drives compressor 2 to work by driving belt 3, compressed refrigerant
Commutate after discharge refrigerant pipe 24 enters oil eliminator 4 through four-way valve 19, sleeve pipe heat exchanger 17 and radiator 18 into
Row heat exchange and heat dissipation, condensed refrigerant enter the room the evaporation of heat exchanger 21 after drier 20 and electric expansion valve 22 and inhale
Heat, then enter vapour liquid separator 8 through four-way valve 19, it most returns in compressor 2 and is compressed through refrigerant suction pipe 10 afterwards, completed
The working cycles of one refrigeration mode refrigerant.
Under heat pattern of freezing, gas engine 1 directly drives compressor 2 to work by driving belt 3, compressed refrigeration
Agent commutates after discharge refrigerant pipe 24 enters oil eliminator 4 through four-way valve 19,21 heat release of heat exchanger is entered the room, after condensation
Refrigerant enter radiator 18 and double-tube heat exchanger 17 after electric expansion valve 22 and drier 20 and radiator 18 is changed
Heat and heat dissipation, refrigerant become gaseous state, return to vapour liquid separator 8 through four-way valve 19, most return to pressure through refrigerant suction pipe 10 afterwards
It is compressed in contracting machine 2, completes the working cycles of a heating mode refrigerant.
When heat pump air conditioning system does not work, oil return switch valve 16 is closed, when heat pump air conditioning system work, oil return system
Also it must work normally, oil return switch valve 16 is opened, and refrigeration oil is under the action of oil eliminator 4, from the refrigeration oil of the discharge of compressor 2
It is split into the bottom of oil eliminator 4, refrigeration oil enters check valve 6 under the action of pressure difference, along oil return pipe 5, opens through oil return
It closes valve 16 and oil return hollow billet 15 returns to the refrigerant suction pipe 10 of compressor 2, then flow back in the lubricating cavity of compressor 2, complete
One oil return circulation.
In the case where heat pump air conditioning system works normally, return pressure sensor 7 and returning-oil temperature sensor 23 are instant
The pressure and temperature for detecting oil return line, when discharge temperature of the oil temperature close to compressor 2 of oil return pipe 5, and pressure and compressor 2
When suction pressure is suitable, determine that machine oil reflux is normal, when oil return capillary 15 falls plug or oil return exception, return pressure sensor
7 and returning-oil temperature sensor 23 will appear exception.
The pressure that return pressure sensor 7 detects is compared with low inspiratory pressure sensor 14 and exhaust 11 value of high pressure sensor
When compared with, hypotony, appropriate 2 revolving speed of compressor that increases improves 7 value of return pressure sensor, to increase compressor recirculating oil quantity.
For above-described embodiment simply to illustrate that the technical ideas and features of the present invention, its purpose is allows this field
Interior those of ordinary skill can understand the content of the utility model and implement accordingly, can not limit the utility model with this
Protection scope.The equivalent changes or modifications that all essence according to the content of the present invention is made, should all cover in this reality
With in novel protection scope.
Claims (2)
1. a kind of automatic oil return gas engine heat pump system, it is characterised in that: including refrigerant-cycle systems and automatic oil return system；
The refrigerant-cycle systems include compressor (2), oil eliminator (4), vapour liquid separator (8), double-tube heat exchanger
(17), radiator (18), four-way valve (19), drier (20), indoor heat exchanger (21) and electric expansion valve (22)；Compressor
(2) exhaust outlet is connect by discharge refrigerant pipe (24) with the entrance of oil eliminator (4), and the refrigerant of oil eliminator (4) goes out
Mouth is connect with the first port of four-way valve (19), and the second port of four-way valve (19) is successively through double-tube heat exchanger (17), radiator
(18), drier (20), electric expansion valve (22) are connect with one end of indoor heat exchanger (21), indoor heat exchanger (21) it is another
End is connect with the third port of four-way valve (19), and the 4th port of four-way valve (19) is connect with the entrance of vapour liquid separator (8), vapour
The outlet of liquid/gas separator (8) is connect by refrigerant suction pipe (10) with the air entry of compressor (2)；
The automatic oil return system include oil eliminator (4), oil return pipe (5), check valve (6), return pressure sensor (7),
Be vented high pressure sensor (11), exhaust gas temperature sensor (12), suction temperature sensor (13), low inspiratory pressure sensor (14),
Oil return capillary (15), oil return switch valve (16) and returning-oil temperature sensor (23)；One end of oil return pipe (5) and oil eliminator
(4) the oil outlet connection of bottom, the other end is connected on refrigerant suction pipe (10), check valve (6), oil return switch valve (16),
Oil return capillary (15), return pressure sensor (7) and returning-oil temperature sensor (23) streamwise are successively set on oil return
It manages on (5)；It is vented high pressure sensor (11) and exhaust gas temperature sensor (12) is arranged on discharge refrigerant pipe (24), air-breathing temperature
It spends sensor (13) and low inspiratory pressure sensor (14) is arranged on refrigerant suction pipe (10), and be located at oil return pipe (5) and system
The downstream of cryogen air intake duct (10) junction.
2. a kind of automatic oil return gas engine heat pump system according to claim 1, it is characterised in that: the refrigerant suction
Vibration absorbing hose (9) are provided on pipe (10) and discharge refrigerant pipe (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821697579.1U CN209027150U (en) | 2018-10-18 | 2018-10-18 | A kind of automatic oil return gas engine heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821697579.1U CN209027150U (en) | 2018-10-18 | 2018-10-18 | A kind of automatic oil return gas engine heat pump system |
Publications (1)
| Publication Number | Publication Date |
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| CN209027150U true CN209027150U (en) | 2019-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821697579.1U Active CN209027150U (en) | 2018-10-18 | 2018-10-18 | A kind of automatic oil return gas engine heat pump system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163479A (en) * | 2018-10-18 | 2019-01-08 | 中国科学院广州能源研究所 | A kind of automatic oil return gas engine heat pump system |
-
2018
- 2018-10-18 CN CN201821697579.1U patent/CN209027150U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109163479A (en) * | 2018-10-18 | 2019-01-08 | 中国科学院广州能源研究所 | A kind of automatic oil return gas engine heat pump system |
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