CN108489130A - A kind of screw single machine three stage compression heat pump heating system and control method - Google Patents
A kind of screw single machine three stage compression heat pump heating system and control method Download PDFInfo
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- CN108489130A CN108489130A CN201810576673.XA CN201810576673A CN108489130A CN 108489130 A CN108489130 A CN 108489130A CN 201810576673 A CN201810576673 A CN 201810576673A CN 108489130 A CN108489130 A CN 108489130A
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- 238000007906 compression Methods 0.000 title claims abstract description 61
- 230000006835 compression Effects 0.000 title claims abstract description 60
- 238000010438 heat treatment Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 75
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 239000003507 refrigerant Substances 0.000 claims abstract description 42
- 230000001502 supplementing effect Effects 0.000 claims abstract description 22
- 239000003921 oil Substances 0.000 claims description 50
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 claims description 8
- 238000001704 evaporation Methods 0.000 claims description 8
- 230000008020 evaporation Effects 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 230000003139 buffering effect Effects 0.000 claims description 3
- 239000010725 compressor oil Substances 0.000 claims description 3
- 239000000314 lubricant Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000005461 lubrication Methods 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 239000010687 lubricating oil Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000003020 moisturizing effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 238000005338 heat storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 239000003643 water by type Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/10—Compression machines, plants or systems with non-reversible cycle with multi-stage compression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
-
- 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
- F25B2400/07—Details of compressors or related parts
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of screw single machine three stage compression heat pump heating system and control methods, it is characterized by comprising single machine three-level screw compressors, single machine three-level screw compressor is equipped with refrigerant inlet, refrigerant outlet, the first gas supplementing opening, the second gas supplementing opening and oil return opening, refrigerant inlet and is connected with gas-liquid separator, and refrigerant outlet is connected with oil eliminator；First gas supplementing opening is connected with the second economizer, second gas supplementing opening now connects with the first economizer, the oil outlet of oil eliminator connects oil cooler, is connected successively with oil strainer, solenoid valve and oil stream amount switch again, is finally connected with the oil return opening of single machine three-level screw compressor.Existing air source heat pump is solved because compression ratio is more than limit value, the problem of leaving water temperature is low and use environment narrow range, the technical solution can be applied in China whole heating area, traditional coal-burning boiler will directly be replaced, installation transformation is convenient, economy is quick, energy conservation and environmental protection, is preferable heating technology scheme.
Description
Technical field
The present invention relates to air source heat pump technical fields, more particularly to a kind of screw single machine three stage compression heat pump heating system
System and control method.
Background technology
In the existing heating system of northern China, radiator heating is main way, empty in recent years under " coal changes electricity " policy
Air supply heat pump collocation radiator heating is widely used, and air source heat pump substitutes improvement of the coal-burning boiler to China's environment
Great role is played, but existing air source heat pump collocation radiator heating has following defect：
1, leaving water temperature is relatively low, and highest only has 60 DEG C, and traditional coal-burning boiler leaving water temperature is all at 80 DEG C or more, due to
Water temperature low latitude air supply heat pump can not be matched with traditional cast-iron radiator, can only be changed to expensive new radiator, and
And comfort is poor, such as uses floor heating mode, retrofit work amount is larger, costly.
2, it can only be used in -25 DEG C or more areas, can not be used in cold districts such as northeast, northwests, limit air-source
The popularization of heat pump.
Although 3, obtaining the single machine compression with double stage air source heat pump or overlapping air source heat pump one of Preliminary Applications in recent years
Determine to improve leaving water temperature in degree and expanded application range, but because compression ratio is more than limit value, there is also extremely cold environment temperature
The lower output water temperature of degree is relatively low, and mixing refrigerant reliability is poor, the relatively low problem of unit operation efficiency.
4, frequent starting and stopping when air source heat pump heats, unit durability is short, and heating system stability and comfort are poor.
Invention content
The technical problem to be solved by the present invention is to the how effective collocation existing traditional heat sinks of air source heat pump to come
Air source heat pump heating is realized the use of ultra-low temperature surroundings temperature the problem of and improves leaving water temperature.
In order to solve the above-mentioned technical problem, the present invention devises a kind of screw single machine three stage compression heat pump heating system,
It is characterized by comprising single machine three-level screw compressor, single machine three-level screw compressor includes the first order pressure being connected in series with
Contracting machine, high stage compressor and third level compressor, single machine three-level screw compressor is equipped with refrigerant inlet, refrigerant goes out
Mouth, the first gas supplementing opening, the second gas supplementing opening and oil return opening, refrigerant inlet are connected with gas-liquid separator, refrigerant outlet and oil
Separator is connected；First gas supplementing opening is connected with the second economizer, and the second gas supplementing opening now connects with the first economizer, and oil eliminator goes out
Hydraulic fluid port connect oil cooler, again successively with oil strainer, solenoid valve and oil stream amount switch be connected, finally with single machine three-level screw pressure
The oil return opening of contracting machine is connected.
The screw single machine three stage compression heat pump heating system, it is characterised in that the first economizer and the second economizer
It is made of two-stage flash type economizer, the first order is the first economizer, and the second level is the second economizer, the first economizer and second
Economizer is connected by the second expansion valve.
The screw single machine three stage compression heat pump heating system, it is characterised in that further include shell and tube condenser, institute
The inlet and outlet for stating oil cooler and shell and tube condenser are in parallel.
The screw single machine three stage compression heat pump heating system, it is characterised in that the gas outlet of the oil eliminator with
The D mouths of four-way valve are connected, and the C mouths of four-way valve are connected with the air intake of shell and tube condenser, the S mouths of four-way valve and gas-liquid separation
The air intake of device is connected, and the E mouths of four-way valve are connected with finned evaporator.
The screw single machine three stage compression heat pump heating system, it is characterised in that the gas outlet of shell and tube condenser according to
It is secondary to be connected with the first economizer with after liquid pipe filter and the first electric expansion valve.
The screw single machine three stage compression heat pump heating system, it is characterised in that the second economizer passes through third electronics
It is connected with finned evaporator after expansion valve.
The screw single machine three stage compression heat pump heating system, it is characterised in that further include buffer tank, it is described slow
Waste preventer is connected with the water outlet of screw single machine three stage compression heat pump heating system and water inlet, the buffer tank
It is additionally provided with water circulating pump between the water outlet of screw single machine three stage compression heat pump heating system.
The screw single machine three stage compression heat pump heating system, it is characterised in that further include convector and second
The water inlet of water circulating pump, the convector is connected with water outlet with buffer tank, and second circulation water pump is arranged in institute
It states between the water inlet of convector and buffer tank.
A kind of method of screw single machine three stage compression heat pump heating, it is characterised in that pass through single machine three-level screw-compression
Machine carries out three second compressions to refrigerant, and compression becomes the gaseous state of high temperature and pressure, and the gaseous refrigerant of high temperature and pressure passes through shell-tube type
Condenser pair exchanges heat with water, completes the heating to water, and refrigerant condenses, and is condensed into the liquid of high temperature and pressure,
By liquid pipe filter, and enter the first economizer of flash type after the throttling of the first electric expansion valve, becomes medium temperature and medium pressure
Gas-liquid mixed state, gaseous state therein filled into the third level compressor and high stage compressor of single machine three-level screw compressor
The second intermediate gas supplementing opening；Meanwhile some liquid refrigerant evaporation becomes gaseous state in the first economizer of flash type, and absorb remaining
The liquid refrigerant of the heat of partial liquid refrigerant, remaining part is subcooled, by the throttling of the second electric expansion valve
Enter the second economizer of flash type afterwards, becomes the gas-liquid mixed state of medium temperature and medium pressure, gaseous state therein is filled into single machine three-level screw rod
The high stage compressor and the first gas supplementing opening among first order compressor of formula compressor, meanwhile, in the second economizer of flash type
Some liquid refrigerant evaporation becomes gaseous state, and absorbs the heat for the liquid refrigerant for being left part, is left the liquid system of part
Cryogen is subcooled；Enter finned evaporation after the throttling of third electric expansion valve by the liquid refrigerant being subcooled twice
Device exchanges heat with outdoor -40 DEG C of air, the gaseous state of low-temp low-pressure is evaporated into, after four-way valve and gas-liquid separator
It returns to single machine three-level screw compressor and enters subsequent cycle.
The method of the screw single machine three stage compression heat pump heating, it is characterised in that further include heating step, heating
High-temperature water afterwards is entered by water circulating pump in buffer tank, and cycle heats the water of buffer tank；Pass through second circulation
High-temperature water in buffer tank is pumped into convector by water pump, is realized to space heating by convector.
The method of the screw single machine three stage compression heat pump heating, it is characterised in that single machine three-level screw compressor
By the gaseous refrigerant R134a suckings of low-temp low-pressure, first order compression promotes its pressure to 1~2bar by being less than 0.29bar,
By its pressure, further promotion is further promoted to 6~8bar, third level compression to more than 35bar for second level compression.
The method of the screw single machine three stage compression heat pump heating, it is characterised in that further include oil separation processing stream
Journey, the gas that single machine three-level screw compressor is carried out to the high temperature and pressure after three stage compression are input to oil eliminator, oil separation
Device detaches the gaseous refrigerant R134a of the high temperature and pressure compressor lubricant oils carried, and the lubricating oil after separation is further
Cool down by oil cooler and water heat exchange, and filtered by oil strainer, switchs using solenoid valve and oil stream amount, finally divide equally
Three tunnels return to compressor oil return opening.
Implement the present invention to have the advantages that：Existing air source heat pump is solved because compression ratio is more than limit value, is discharged
The problem of temperature is low and use environment narrow range, which can apply in China whole heating area, will directly replace biography
The coal-burning boiler of system, installation transformation is convenient, economy is quick, energy conservation and environmental protection, is preferable heating technology scheme.
Description of the drawings
Fig. 1 is screw single machine three stage compression heat pump heating system connection block diagram；
Fig. 2 is single machine three-level screw compressor solution definition graph；
Fig. 3 is heating part subsystem connection block diagram.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
It, need to be by R134a systems when air source heat pump system will realize 90 DEG C of high-temperature-hot-waters of output under -40 DEG C of extremely cold environment temperatures
Cryogen is compressed to absolute pressure 35.9bar from absolute pressure 0.29bar, and using single stage compress, compression ratio 120 is each using Two-stage Compression
Stage compression ratio is 11, and compressor all greatly exceeds restriction range, screw single machine tertiary compressed air source hot pump system of the present invention
System uses single machine three-level screw compressor, separate unit screw compressor that can carry out three second compressions to R134a refrigerants, pass through three
Grade compress technique, first order compression are promoted its pressure to 1.44bar by 0.29bar, second level compression by its pressure by
1.44bar is promoted to 7.2bar, and the third level, which compresses, is promoted its pressure to 35.9bar by 7.2bar, the every level-one of mean allocation
Compression ratio, the compression ratio per level-one are less than 5, and compression ratio controls in the preferred range, realize and are produced under -40 DEG C of extremely cold environment temperatures
Go out the function of 90 DEG C of high-temperature-hot-waters.
Fig. 2 is single machine three-level screw compressor solution definition graph, and single machine three-level screw compressor A includes being connected in series with
First order compressor A1, high stage compressor A2 and third level compressor A3, single machine three-level screw compressor are equipped with refrigeration
Agent entrance, refrigerant outlet, the first gas supplementing opening A4, the second gas supplementing opening A5 and oil return opening.
Fig. 1 is screw single machine three stage compression heat pump heating system connection block diagram.The system of single machine three-level screw compressor A
Cryogen entrance is connected with gas-liquid separator 12, and refrigerant outlet is connected with oil eliminator 2；Second gas supplementing opening A5 and first is economical
Device 7 is connected, and the first gas supplementing opening A4 now connects with the second economizer 9；First economizer 7 is passed through with the second economizer 9 by two-stage flash type
The device that helps is constituted, and the first order is the first economizer 7, and the second level is the second economizer 9, and the first economizer 7 passes through with the second economizer 9
Second expansion valve 8 is connected.Using two-stage flash type economizer, both the liquid refrigerants come out from condenser was subcooled twice,
The enthalpy of liquid refrigerants is improved, and two-stage tonifying Qi is carried out to compressor, reduces the temperature of compressor electric motor operation, flash type
Economizer heat transfer process improves 50% or more without the temperature difference, heat pump system efficiency.
The oil outlet of oil eliminator 2 connects oil cooler 16, is switched successively with oil strainer 13, solenoid valve 14 and oil stream amount again
15 are connected, and are finally connected with the oil return opening of single machine three-level screw compressor.The gas outlet of oil eliminator 2 and the D mouths of four-way valve 1
It is connected, the C mouths of four-way valve 1 are connected with the air intake of shell and tube condenser 4, and the S mouths of four-way valve 1 enter gas with gas-liquid separator
Mouth is connected, and the E mouths of four-way valve 1 are connected with finned evaporator 17.The gas outlet of shell and tube condenser 4 successively with liquid pipe filter
5 and first are connected with the first economizer 7 after electric expansion valve 6.Second economizer 9 after third electric expansion valve 10 with wing
Plate evaporator 17 is connected.
The inlet and outlet of oil cooler and shell and tube condenser are in parallel.Using water-cooled oil cooling machine, Inlet and outlet water
Mouth is in parallel with the progress of shell and tube condenser intake-outlet, both carries out rational temperature control to lubricating oil, and lubricating oil viscosity is reasonable,
When returning to compressor, compressor obtains good lubrication, improves the stability and working efficiency of compressor, meanwhile, lubricating oil
Heat hot water, recycled lubricating oil heat, further improved the working efficiency of heat pump system.
By the valve valve member on screw single machine tertiary compressed air source hot pump unit, buffer tank, radiator and water route
Deng also composable heating system, when heating, unit is by heat storage in buffer tank, and after water temperature reaches 90 DEG C, unit stops
It only runs, heat load is provided by buffer tank at this time, and when buffer tank is when dropping to 80 DEG C, unit starting operation again will
Heat storage recycles successively in buffer tank, and the frequency of unit starting and stopping is reduced, and solves existing air-source heat
Frequent starting and stopping in pump heating, unit durability is short, the problem of heating system stability and comfort difference.
Illustrate its concrete operating principle below：
One：Hot-water mode.Single machine three-level screw compressor sucks the gaseous refrigerant R134a of low-temp low-pressure, and first
Grade compressor is promoted its pressure to 1.44bar by 0.29bar, high stage compressor by its pressure by 1.44bar promoted to
7.2bar, third level compressor are promoted its pressure to 35.9bar, the gaseous refrigerant R134a quilts of low-temp low-pressure by 7.2bar
State becomes the gaseous state of high temperature and pressure after three second compression of compressor, into oil eliminator, the gaseous refrigerant R134a of high temperature and pressure
The compressor lubricant oil of carrying is detached in oil eliminator, and lubricating oil cools down by oil cooler and water heat exchange, is filtered by oil
Device filters, and is switched using solenoid valve and oil stream amount, finally respectively three tunnels return to compressor oil return opening；It is separated lubricating oil
The gaseous refrigerant R134a of high temperature and pressure is exchanged heat by entering shell and tube condenser after four-way valve with water, heats the water to 90 DEG C,
It is condensed into the liquid of high temperature and pressure, and by liquid pipe filter, flash type is entered after the throttling of the first electric expansion valve
First economizer, becomes the gas-liquid mixed state of medium temperature and medium pressure, and gaseous state therein is filled into the of single machine three-level screw compressor
The second gas supplementing opening among three-level and the second level, meanwhile, some liquid refrigerant, which evaporates, in the first economizer of flash type becomes gas
State, and the heat for the liquid refrigerant for being left part is absorbed, the liquid refrigerant of remaining part is subcooled, by the second electronics
Enter the second economizer of flash type after the throttling of expansion valve, becomes the gas-liquid mixed state of medium temperature and medium pressure, gaseous state therein is filled into
The second level of single machine three-level screw compressor and the first gas supplementing opening among the first order, meanwhile, in the second economizer of flash type
Some liquid refrigerant evaporation becomes gaseous state, and absorbs the heat for the liquid refrigerant for being left part, is left the liquid system of part
Cryogen is subcooled；Enter finned evaporation after the throttling of third electric expansion valve by the liquid refrigerant being subcooled twice
Device exchanges heat with outdoor -40 DEG C of air, the gaseous state of low-temp low-pressure is evaporated into, after four-way valve and gas-liquid separator
It returns to single machine three-level screw compressor and enters subsequent cycle.
Two, heating mode：
Fig. 3 is heating part subsystem connection block diagram, and screw single machine three stage compression heat pump heating system further includes buffering
Water tank 21, buffer tank 21 are connected with the water outlet of screw single machine three stage compression heat pump heating system and water inlet, delay
Waste preventer is additionally provided with water circulating pump 22 between the water outlet of screw single machine three stage compression heat pump heating system, can also increase
If filter, it to be used for filtration cycle water quality.Further include convector 23 and second circulation water pump 24, convector 23 enters
The mouth of a river is connected with water outlet with buffer tank 21, and water inlet and buffered water in convector is arranged in second circulation water pump 24
Between case.Water circulating pump sucks the water of buffer tank, is extracted into the water inlet of screw single machine tertiary compressed air source hot pump, water
It is come out from the water outlet of screw single machine tertiary compressed air source hot pump after being heated, buffer tank is returned to, again by recirculated water
Pumping enters into subsequent cycle, until the hot water of buffer tank is heated to 90 DEG C；90 DEG C of hot water of simultaneous buffering water tank by
The suction or so of second circulation pump, enters convector by ball valve, shunt valve, is distributed heat simultaneously by convector
Heating indoor air, hot water return to after being cooled down by shunt valve, ball valve, check valve, filter, expansion drum 25, water circulating pump
Buffer tank enters subsequent cycle.When buffer tank needs moisturizing, the moisturizing ball valve of bottom is opened, moisturizing is by ball valve, list
Enter major cycle pipeline to valve, after being mixed from the hot water that convector comes out, by filter, expansion drum, water circulating pump
Into buffer tank.There is addition anti-icing fluid in expansion drum, is equipped with necessary ball valve as needed on each water route access.
Disclosed above is only an embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and is wanted according to right of the present invention
Equivalent variations made by asking, still belong to the scope covered by the invention.
Claims (9)
1. a kind of screw single machine three stage compression heat pump heating system, it is characterised in that including single machine three-level screw compressor,
Single machine three-level screw compressor includes the first order compressor, high stage compressor and third level compressor being connected in series with, single
Machine three-level screw compressor be equipped with refrigerant inlet, refrigerant outlet, the first gas supplementing opening, the second gas supplementing opening and oil return opening,
Refrigerant inlet is connected with gas-liquid separator, and refrigerant outlet is connected with oil eliminator；First gas supplementing opening and the second economizer
Be connected, the second gas supplementing opening now connects with the first economizer, the oil outlet of oil eliminator connect oil cooler, again successively with oil strainer,
Solenoid valve is connected with oil stream amount switch, is finally connected with the oil return opening of single machine three-level screw compressor.
2. screw single machine three stage compression heat pump heating system according to claim 1, it is characterised in that the first economizer
Be made of two-stage flash type economizer with the second economizer, the first order be the first economizer, the second level be the second economizer, first
Economizer is connected with the second economizer by the second expansion valve；Further include shell and tube condenser, the oil cooler and shell-tube type
The inlet and outlet of condenser are in parallel.
3. screw single machine three stage compression heat pump heating system according to claim 2, it is characterised in that the oil separation
The gas outlet of device is connected with the D of four-way valve mouths, and the C mouths of four-way valve are connected with the air intake of shell and tube condenser, the S of four-way valve
Mouth is connected with the air intake of gas-liquid separator, and the E mouths of four-way valve are connected with finned evaporator；The gas outlet of shell and tube condenser
It is connected successively with the first economizer with after liquid pipe filter and the first electric expansion valve；Second economizer is swollen by third electronics
It is connected with finned evaporator after swollen valve.
4. screw single machine three stage compression heat pump heating system according to claim 3, it is characterised in that further include buffering
Water tank, the buffer tank are connected with the water outlet of screw single machine three stage compression heat pump heating system and water inlet, institute
That states buffer tank is additionally provided with water circulating pump between the water outlet of screw single machine three stage compression heat pump heating system.
5. screw single machine three stage compression heat pump heating system according to claim 4, it is characterised in that further include heating
Radiator and second circulation water pump, the water inlet of the convector are connected with water outlet with buffer tank, second circulation
Water pump is arranged between the water inlet and buffer tank of the convector.
6. a kind of method of screw single machine three stage compression heat pump heating, it is characterised in that pass through single machine three-level screw compressor
Three second compressions are carried out to refrigerant, compression becomes the gaseous state of high temperature and pressure, and the gaseous refrigerant of high temperature and pressure is cold by shell-tube type
Condenser pair exchanges heat with water, completes the heating to water, and refrigerant condenses, and is condensed into the liquid of high temperature and pressure, passes through
Liquid pipe filter is crossed, and enters the first economizer of flash type after the throttling of the first electric expansion valve, becomes medium temperature and medium pressure
Gas-liquid mixed state, gaseous state therein are filled into the third level compressor and high stage compressor of single machine three-level screw compressor
Between the second gas supplementing opening；Meanwhile some liquid refrigerant evaporation becomes gaseous state in the first economizer of flash type, and absorb the portion of being left
The liquid refrigerant of the heat of the liquid refrigerant divided, remaining part is subcooled, after the throttling of the second electric expansion valve
Into the second economizer of flash type, become the gas-liquid mixed state of medium temperature and medium pressure, gaseous state therein is filled into single machine three-level screw
The high stage compressor and the first gas supplementing opening among first order compressor of compressor, meanwhile, in the middle part of the second economizer of flash type
Divide liquid refrigerant evaporation to become gaseous state, and absorb the heat for the liquid refrigerant for being left part, is left the liquid refrigeration of part
Agent is subcooled；Enter finned evaporation after the throttling of third electric expansion valve by the liquid refrigerant being subcooled twice
Device exchanges heat with outdoor -40 DEG C of air, the gaseous state of low-temp low-pressure is evaporated into, after four-way valve and gas-liquid separator
It returns to single machine three-level screw compressor and enters subsequent cycle.
7. the method for screw single machine three stage compression heat pump heating according to claim 6, it is characterised in that further include supplying
Warm step, the high-temperature water after heating are entered by water circulating pump in buffer tank, and cycle heats the water of buffer tank；It is logical
It crosses second circulation water pump and the high-temperature water in buffer tank is pumped into convector, space is added by convector realization
Heat.
8. the method for screw single machine three stage compression heat pump heating according to claim 7, it is characterised in that single machine three-level
Its pressure is carried the gaseous refrigerant R134a suckings of low-temp low-pressure, first order compression by screw compressor by being less than 0.29bar
It is raised to 1~2bar, second level compression further promotes its pressure to 6~8bar, and third level compression is further promoted to being more than
35bar。
9. the method for screw single machine three stage compression heat pump heating according to claim 8, it is characterised in that further include oil
Separating treatment flow, the gas that single machine three-level screw compressor is carried out to the high temperature and pressure after three stage compression are input to oily separation
Device, oil eliminator detach the gaseous refrigerant R134a of the high temperature and pressure compressor lubricant oils carried, the lubrication after separation
Oil cools down further across oil cooler and water heat exchange, and is filtered by oil strainer, is switched using solenoid valve and oil stream amount,
Finally divide equally three tunnels and returns to compressor oil return opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810576673.XA CN108489130A (en) | 2018-06-06 | 2018-06-06 | A kind of screw single machine three stage compression heat pump heating system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810576673.XA CN108489130A (en) | 2018-06-06 | 2018-06-06 | A kind of screw single machine three stage compression heat pump heating system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108489130A true CN108489130A (en) | 2018-09-04 |
Family
ID=63342084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810576673.XA Pending CN108489130A (en) | 2018-06-06 | 2018-06-06 | A kind of screw single machine three stage compression heat pump heating system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108489130A (en) |
Cited By (9)
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| CN110285060A (en) * | 2019-07-29 | 2019-09-27 | 珠海格力电器股份有限公司 | Compressor with multiple air supply structure and air conditioning system |
| CN110701664A (en) * | 2019-11-11 | 2020-01-17 | 江苏天舒电器有限公司 | Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade type heat engine system and working method thereof |
| CN110925198A (en) * | 2019-11-01 | 2020-03-27 | 山东佳利略能源科技有限公司 | Multistage air supply screw compressor with economizer loop |
| CN111336719A (en) * | 2020-05-20 | 2020-06-26 | 山东佳利略能源科技有限公司 | Single-machine multi-air-supply screw type heat pump unit |
| CN111623546A (en) * | 2020-04-26 | 2020-09-04 | 珠海格力电器股份有限公司 | Triple throttling enthalpy-increasing double-condensation refrigerating system, air conditioner and control method |
| CN114576880A (en) * | 2022-03-24 | 2022-06-03 | 山东阿尔普尔节能装备有限公司 | Single-machine two-stage screw compression ultra-large ultralow temperature air source heat pump unit |
| CN114992910A (en) * | 2022-05-26 | 2022-09-02 | 浙江中广电器集团股份有限公司 | Three-stage compressed air source heat pump unit adopting flash tank and economizer |
| CN115199538A (en) * | 2022-08-04 | 2022-10-18 | 山东省章丘鼓风机股份有限公司 | Screw blower using pressure regulating hole to change internal compression ratio |
| WO2024076711A1 (en) * | 2022-10-06 | 2024-04-11 | Johnson Controls Tyco IP Holdings LLP | Heating, ventilation, air conditioning, and/or refrigeration system with heating and cooling operations |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110285060A (en) * | 2019-07-29 | 2019-09-27 | 珠海格力电器股份有限公司 | Compressor with multiple air supply structure and air conditioning system |
| CN110285060B (en) * | 2019-07-29 | 2023-10-10 | 珠海格力电器股份有限公司 | Compressor with multiple air supplementing structure and air conditioning system |
| CN110925198A (en) * | 2019-11-01 | 2020-03-27 | 山东佳利略能源科技有限公司 | Multistage air supply screw compressor with economizer loop |
| CN110925198B (en) * | 2019-11-01 | 2021-01-01 | 山东佳利略能源科技有限公司 | Air-supplementing screw compressor with economizer loop |
| CN110701664A (en) * | 2019-11-11 | 2020-01-17 | 江苏天舒电器有限公司 | Wide-ring-temperature multi-stage water outlet variable-frequency air energy cascade type heat engine system and working method thereof |
| CN110701664B (en) * | 2019-11-11 | 2023-05-05 | 江苏天舒电器有限公司 | Wide-ring-temperature multistage water outlet variable-frequency air energy cascade heat engine system and working method thereof |
| CN111623546A (en) * | 2020-04-26 | 2020-09-04 | 珠海格力电器股份有限公司 | Triple throttling enthalpy-increasing double-condensation refrigerating system, air conditioner and control method |
| CN111336719A (en) * | 2020-05-20 | 2020-06-26 | 山东佳利略能源科技有限公司 | Single-machine multi-air-supply screw type heat pump unit |
| CN114576880A (en) * | 2022-03-24 | 2022-06-03 | 山东阿尔普尔节能装备有限公司 | Single-machine two-stage screw compression ultra-large ultralow temperature air source heat pump unit |
| CN114992910A (en) * | 2022-05-26 | 2022-09-02 | 浙江中广电器集团股份有限公司 | Three-stage compressed air source heat pump unit adopting flash tank and economizer |
| CN115199538A (en) * | 2022-08-04 | 2022-10-18 | 山东省章丘鼓风机股份有限公司 | Screw blower using pressure regulating hole to change internal compression ratio |
| WO2024076711A1 (en) * | 2022-10-06 | 2024-04-11 | Johnson Controls Tyco IP Holdings LLP | Heating, ventilation, air conditioning, and/or refrigeration system with heating and cooling operations |
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