CN110411054A - A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method - Google Patents
A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method Download PDFInfo
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- CN110411054A CN110411054A CN201910614500.7A CN201910614500A CN110411054A CN 110411054 A CN110411054 A CN 110411054A CN 201910614500 A CN201910614500 A CN 201910614500A CN 110411054 A CN110411054 A CN 110411054A
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to combustion-gas thermal pump air-conditioning systems and control method that one kind can reduce lubricating oil temperature, including the refrigerant circulation loop being sequentially formed by connecting by compressor, oil eliminator, four-way valve, indoor set heat exchanger, outdoor unit heat exchanger and gas-liquid separator.It further include oil cooler；The oil cooler includes closed cylinder, and end face and lower end surface are respectively equipped with the oil inlet and oil outlet being connected with inside it thereon；The oil inlet is connected with the bottom of the oil eliminator；The oil outlet is connected with the air intake duct of the compressor；The inner barrel is equipped with coil pipe；The inlet end and an outlet end of the coil pipe stretches out the cylinder respectively；The outlet end is connected in the air inlet pipe of the gas-liquid separator；The input end is connected on the pipeline between the indoor set heat exchanger and outdoor unit heat exchanger.The temperature of lubricating oil is effectively reduced by the aperture of the auxiliary electric expansion valve of adjusting in the present invention, it is ensured that system operates normally.
Description
Technical field
The present invention relates to a kind of air-conditioning system, especially a kind of heat pump air conditioning system and its control method, specifically
A kind of control method for the combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature.
Background technique
Lubricating oil is that most of compressor of air conditioner normal operation is essential, and compressor oil starvation will lead to mechanical wear,
To damage compressor.And lubricating oil is usually to dissolve each other with refrigerant, temperature increases after refrigerant is by compressor compresses, lubrication
The temperature of oil also increases.Gas heat pump air-conditioning is to complete refrigeration and heating using gas engine-driven compressor operation
The air-conditioning system of circulation.Since air-conditioning system can recycle heat of engine, the delivery temperature of combustion-gas thermal pump air-conditioning system compared with
Common air-conditioning is much higher, so the temperature of compressor lubricant oil is also relatively higher.Lubricating oil temperature is excessively high to will lead to viscosity drop
The problems such as low, beacon decay, moreover, during high temperature grease returns to compressor by oil eliminator separation, lubricating oil and outer
Boundary's heat exchange, temperature gradually decrease, and will cause thermal loss.
Currently, mainly cooled down by way of Temperature fall to lubricating oil, it is ineffective, it is difficult to meet combustion gas heat
The operation demand of pump, needs to improve.
Summary of the invention
The purpose of the present invention is can reduce lubricating oil currently aiming at the problem that encountering in terms of lubricating oil cooling, providing one kind
The temperature of lubricating oil can be effectively reduced in the control method of the combustion-gas thermal pump air-conditioning system of temperature, avoids the performance of lubricating oil fast
Speed decaying, guarantees the lubrication needs of compressor, meanwhile, it, by the heat in recycling lubricating oil, can also be improved in heating operation
The Operating ettectiveness of system.
The technical scheme is that
A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature, including by compressor, oil eliminator, four-way valve, interior
The refrigerant circulation loop that machine heat exchanger, outdoor unit heat exchanger and gas-liquid separator are sequentially formed by connecting.It further include oil cooler；
The oil cooler includes closed cylinder, and end face and lower end surface are respectively equipped with the oil inlet being connected with inside it and fuel-displaced thereon
Mouthful；The oil inlet is connected with the bottom of the oil eliminator；The oil outlet is connected with the air intake duct of the compressor；It is described
Inner barrel is equipped with coil pipe；The inlet end and an outlet end of the coil pipe stretches out the cylinder respectively；The outlet end is connected to described
In the air inlet pipe of gas-liquid separator；The input end is connected to the pipeline between the indoor set heat exchanger and outdoor unit heat exchanger
On；The oil outlet is equipped with oil temperature sensor；The air intake duct of the gas-liquid separator is equipped with pressure sensor.
Further, the compressor is by gas engine-driven.
Further, the indoor set heat exchanger is that multiple groups are in parallel；One end of each indoor set heat exchanger is equipped with room
Interior machine electric expansion valve.
Further, the pipeline between the outdoor unit heat exchanger and indoor set heat exchanger is equipped with main electric expansion valve.
Further, the input end of the coil pipe is equipped with auxiliary electric expansion valve.
A kind of control method for the combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature, comprising the following steps:
1) refrigerating operaton:
1.1) refrigeration booting operation, the aperture EV2 of auxiliary electric expansion valve are 0；
1.2) oil outlet temperature TO is detected by oil temperature sensor；When TO >=90 DEG C, go to step 1.3)；If when 90 DEG C of 85≤TO <
When, it goes to step 1.4)；When 85 DEG C of 80≤TO <, go to step 1.5)；When 80 DEG C of TO <, go to step 1.6)；
If 1.3) step of EV2=0, EV2 is opened to 60 step of initial opening, subsequent every 2min opens big 8 step, maximum to 480 steps；If EV2
>=60 steps, then every 2min opens big 8 step, maximum to 480 steps；It goes to step 1.2)；
1.4) EV2 keeps current aperture；It goes to step 1.2)；
If 1.5) step of EV2 >=60, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=0, keeps 0 step；It goes to step
1.2)；
If 1.6) 60 step of EV2 >, turn down to 60 steps, closes after 2min to 0 step；If the step of EV2=60 is turned down to 0 step；It goes to step
1.2)；
2) heating operation:
2.1) heating booting operation, the aperture EV2 of auxiliary electric expansion valve are 60 steps；
2.2) pass through pressure sensor detection system low pressure LP；As LP≤3Bar, go to step 23)；When 3Bar < LP≤
When 3.5Bar, go to step 24)；As 3.5 < LP≤4Bar, go to step 25)；As LP > 4Bar, go to step 2.6)；
If 2.3) step of EV2=0, open to 60 step of initial opening, subsequent every 2min opens big 8 step, maximum to 480 steps；If EV2 >=60
Step, then every 2min opens big 8 step, maximum to 480；It goes to step 2.2)；
2.4) EV2 keeps current aperture；It goes to step 2.2)；
If 2.5) step of EV2 >=60, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=0, keeps 0 step；It goes to step
2.2)；
If 2.6) 60 step of EV2 >, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=60, keeps 60 steps；It goes to step
2.2).
Beneficial effects of the present invention:
The present invention has rational design, and structure is simple, easy to control, and the temperature of lubricating oil can be effectively reduced, and avoids the property of lubricating oil
Can rapid decay, guarantee the lubrication needs of compressor, meanwhile, can also in heating operation, by recycling lubricating oil in heat,
The Operating ettectiveness of raising system.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention.
Fig. 2 is the structural schematic diagram of oil cooler of the invention.
Wherein: 1- compressor；2- oil eliminator；3- four-way valve；4- outdoor unit heat exchanger；The main electric expansion valve of 5-；The room 6-
Interior machine electric expansion valve；7- indoor set heat exchanger；8- gas-liquid separator；9- oil cooler；The auxiliary electric expansion valve of 10-；11- oil return
Pipe；12- oil temperature sensor；13- pressure sensor；14- gas engine.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As depicted in figs. 1 and 2.
A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature, including by compressor 1, oil eliminator 2, four-way valve
3, the refrigerant circulation loop that indoor set heat exchanger 7, outdoor unit heat exchanger 4 and gas-liquid separator 8 are sequentially formed by connecting.The pressure
Contracting machine is by gas engine-driven.The indoor set heat exchanger is that multiple groups are in parallel；One end of each indoor set heat exchanger is set
There is electronic expansion valve of indoor unit, is convenient for each indoor set heat exchanger independent control.The outdoor unit heat exchanger and indoor set heat exchanger
Between pipeline be equipped with main electric expansion valve, can to the refrigerant on refrigerant circulation loop carry out throttle operation.
Meanwhile the invention also includes oil coolers 9.The oil cooler 9 includes closed cylinder 15, thereon end face and lower end
Face is respectively equipped with the oil inlet 17 and oil outlet 18 being connected with inside it；The bottom of the oil inlet 17 and the oil eliminator 2
It is connected；The oil outlet 18 is connected by oil return pipe 11 with the air intake duct of the compressor 1.The oil return pipe is equipped with capillary
Pipe.Coil pipe 16 is equipped with inside the cylinder 15；The inlet end and an outlet end of the coil pipe 16 stretches out the cylinder 15 respectively.Then,
The outlet end is connected in the air inlet pipe of the gas-liquid separator 8, the input end be connected to the indoor set heat exchanger 7 with
On pipeline between outdoor unit heat exchanger 4.The input end of the coil pipe 16 is equipped with auxiliary electric expansion valve 10, can be to inflow institute
The refrigerant for stating coil pipe 16 throttles.The oil outlet is additionally provided with oil temperature sensor, can detect fuel-displaced temperature.The gas
The air intake duct of liquid/gas separator is equipped with pressure sensor, can detect system pressure.
One kind of the present invention can reduce the control method of the combustion-gas thermal pump air-conditioning system of lubricating oil temperature, comprising the following steps:
1) refrigerating operaton:
1.1) refrigeration booting operation, the aperture EV2 of auxiliary electric expansion valve are 0；
1.2) oil outlet temperature TO is detected by oil temperature sensor；When TO >=90 DEG C, go to step 1.3)；If when 90 DEG C of 85≤TO <
When, it goes to step 1.4)；When 85 DEG C of 80≤TO <, go to step 1.5)；When 80 DEG C of TO <, go to step 1.6)；
If 1.3) step of EV2=0, EV2 is opened to 60 step of initial opening, subsequent every 2min opens big 8 step, maximum to 480 steps；If EV2
>=60 steps, then every 2min opens big 8 step, maximum to 480 steps；It goes to step 1.2)；
1.4) EV2 keeps current aperture；It goes to step 1.2)；
If 1.5) step of EV2 >=60, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=0, keeps 0 step；It goes to step
1.2)；
If 1.6) 60 step of EV2 >, turn down to 60 steps, closes after 2min to 0 step；If the step of EV2=60 is turned down to 0 step；It goes to step
1.2)；
2) heating operation:
2.1) heating booting operation, the aperture EV2 of auxiliary electric expansion valve are 60 steps；
2.2) pass through pressure sensor detection system low pressure LP；As LP≤3Bar, go to step 2.3)；When 3Bar < LP≤
When 3.5Bar, go to step 2.4)；As 3.5 < LP≤4Bar, go to step 2.5)；As LP > 4Bar, go to step 2.6)；
If 2.3) step of EV2=0, open to 60 step of initial opening, subsequent every 2min opens big 8 step, maximum to 480 steps；If EV2 >=60
Step, then every 2min opens big 8 step, maximum to 480 steps；It goes to step 2.2)；
2.4) EV2 keeps current aperture；It goes to step 2.2)；
If 2.5) step of EV2 >=60, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=0, keeps 0 step；It goes to step
2.2)；
If 2.6) 60 step of EV2 >, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=60, keeps 60 steps；It goes to step
2.2).
The present invention can be effectively reduced the temperature of lubricating oil, avoid the property of lubricating oil by increasing the structures such as oil cooler
Can rapid decay, guarantee the lubrication needs of compressor, meanwhile, can also in heating operation, by recycling lubricating oil in heat,
The Operating ettectiveness of raising system.
Part that the present invention does not relate to is the same as those in the prior art or can be realized by using the prior art.
Claims (6)
1. one kind can reduce the combustion-gas thermal pump air-conditioning system of lubricating oil temperature, including by compressor, oil eliminator, four-way valve, room
The refrigerant circulation loop that interior machine heat exchanger, outdoor unit heat exchanger and gas-liquid separator are sequentially formed by connecting, it is characterized in that: also wrapping
Include oil cooler；The oil cooler includes closed cylinder, and end face and lower end surface are respectively equipped with thereon is connected with inside it
Oil inlet and oil outlet；The oil inlet is connected with the bottom of the oil eliminator；The air-breathing of the oil outlet and the compressor
Pipe is connected；The inner barrel is equipped with coil pipe；The inlet end and an outlet end of the coil pipe stretches out the cylinder respectively；The outlet
End is connected in the air inlet pipe of the gas-liquid separator；The input end is connected to the indoor set heat exchanger and outdoor unit exchanges heat
On pipeline between device；The oil outlet is equipped with oil temperature sensor；The air intake duct of the gas-liquid separator is passed equipped with pressure
Sensor.
2. the combustion-gas thermal pump air-conditioning system according to claim 1 for reducing lubricating oil temperature, it is characterized in that: the compression
Machine is by gas engine-driven.
3. the combustion-gas thermal pump air-conditioning system according to claim 1 for reducing lubricating oil temperature, it is characterized in that: the interior
Machine heat exchanger is that multiple groups are in parallel；One end of each indoor set heat exchanger is equipped with electronic expansion valve of indoor unit.
4. the combustion-gas thermal pump air-conditioning system according to claim 1 for reducing lubricating oil temperature, it is characterized in that: the outdoor
Pipeline between machine heat exchanger and indoor set heat exchanger is equipped with main electric expansion valve.
5. the combustion-gas thermal pump air-conditioning system according to claim 1 for reducing lubricating oil temperature, it is characterized in that: the coil pipe
Input end be equipped with auxiliary electric expansion valve.
6. one kind can reduce the control method of the combustion-gas thermal pump air-conditioning system of lubricating oil temperature, it is characterized in that: the following steps are included:
1) refrigerating operaton:
1.1) refrigeration booting operation, the aperture EV2 of auxiliary electric expansion valve are 0；
1.2) oil outlet temperature TO is detected by oil temperature sensor；When TO >=90 DEG C, go to step 1.3)；If when 90 DEG C of 85≤TO <
When, it goes to step 1.4)；When 85 DEG C of 80≤TO <, go to step 1.5)；When 80 DEG C of TO <, go to step 1.6)；
If 1.3) step of EV2=0, EV2 is opened to 60 step of initial opening, subsequent every 2min opens big 8 step, maximum to 480 steps；If EV2
>=60 steps, then every 2min opens big 8 step, maximum to 480 steps；It goes to step 1.2)；
1.4) EV2 keeps current aperture；It goes to step 1.2)；
If 1.5) step of EV2 >=60, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=0, keeps 0 step；It goes to step
1.2)；
If 1.6) 60 step of EV2 >, turn down to 60 steps, closes after 2min to 0 step；If the step of EV2=60 is turned down to 0 step；It goes to step
1.2)；
2) heating operation:
2.1) heating booting operation, the aperture EV2 of auxiliary electric expansion valve are 60 steps；
2.2) pass through pressure sensor detection system low pressure LP；As LP≤3Bar, go to step 2.3)；When 3Bar < LP≤
When 3.5Bar, go to step 2.4)；As 3.5 < LP≤4Bar, go to step 2.5)；As LP > 4Bar, go to step 2.6)；
If 2.3) step of EV2=0, open to 60 step of initial opening, subsequent every 2min opens big 8 step, maximum to 480；If the step of EV2 >=60,
Then every 2min opens big 8 step, maximum to 480 steps；It goes to step 2.2)；
2.4) EV2 keeps current aperture；It goes to step 2.2)；
If 2.5) step of EV2 >=60, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=0, keeps 0 step；It goes to step
2.2)；
If 2.6) 60 step of EV2 >, every 2min reduces 8 steps, is minimal to 60 steps；If the step of EV2=60, keeps 60 steps；It goes to step
2.2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614500.7A CN110411054B (en) | 2019-07-09 | 2019-07-09 | Gas heat pump air conditioning system capable of reducing temperature of lubricating oil and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614500.7A CN110411054B (en) | 2019-07-09 | 2019-07-09 | Gas heat pump air conditioning system capable of reducing temperature of lubricating oil and control method |
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| CN110411054A true CN110411054A (en) | 2019-11-05 |
| CN110411054B CN110411054B (en) | 2021-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111633464A (en) * | 2020-06-24 | 2020-09-08 | 昆山璟赫机电工程有限公司 | Cooling system of drilling machine |
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| Publication number | Publication date |
|---|---|
| CN110411054B (en) | 2021-02-02 |
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