CN108131860A - A kind of ultra-low temperature air source heat pump based on single machine compression with double stage machine - Google Patents
A kind of ultra-low temperature air source heat pump based on single machine compression with double stage machine Download PDFInfo
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- CN108131860A CN108131860A CN201810104896.6A CN201810104896A CN108131860A CN 108131860 A CN108131860 A CN 108131860A CN 201810104896 A CN201810104896 A CN 201810104896A CN 108131860 A CN108131860 A CN 108131860A
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- 230000006835 compression Effects 0.000 title claims abstract description 52
- 238000007906 compression Methods 0.000 title claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 73
- 238000003860 storage Methods 0.000 claims abstract description 33
- 238000012423 maintenance Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000005057 refrigeration Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 claims description 3
- 239000003507 refrigerant Substances 0.000 abstract description 59
- 230000000694 effects Effects 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 66
- 239000010687 lubricating oil Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000004781 supercooling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000003786 synthesis reaction 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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
-
- 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
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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)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
A kind of ultra-low temperature air source heat pump based on single machine compression with double stage machine proposed by the present invention, belong to air source heat pump technical field, including case tube heat exchanger, liquid storage device, gas-liquid separator, multigroup finned heat exchanger, single machine compression with double stage machine, Horizontal oil separator, oil cooler, economizer, pressure maintenance valve, four-way reversing valve, check valve, multiple solenoid valves, multiple expansion valves and connecting line.The present invention utilizes single machine compression with double stage machine and economizer, the superheated refrigerant that stage compressor is discharged is cooled to and closes on saturation gaseous state, split-compressor compression is entered back into, reduces power consumption of the compressor in high pressure ratio, it being capable of stable heating under ultra-low temperature surroundings.The air source heat pump suitable environment temperature range of the present invention is broad；Air source heat pump is solved cold district power consumption is big, heating effect is bad, is solved in the non-serviceable problem in severe cold area.
Description
Technical field
The invention belongs to air source heat pump technical field, more particularly to a kind of ultralow temperature based on single machine compression with double stage machine is empty
Air supply heat pump.
Background technology
Air source heat pump product is mainly single-stage compressor system at present, and environment temperature is affected to unit during heating,
Minimum operating temperature can only arrive -15 DEG C.The factors such as compressed machine compression ratio, refrigerant property limitation simultaneously, in environment temperature very
When low, it is impossible to which effective heating operation more cannot even be switched on.
A kind of existing air source heat pump principle schematic based on single-stage compressor is as shown in Figure 1, the air source heat pump
Including (single-stage) compressor 26, case tube heat exchanger 17, liquid storage device 12, gas-liquid separator 21, multigroup finned heat exchanger (1,2,3, it is existing
Illustrated for three groups, specifically organize several factually borders it needs to be determined that), four-way reversing valve 16, check valve 11, multiple solenoid valves
With multiple expansion valves and connecting line, the first solenoid valve and first are respectively equipped in the first port of each group finned heat exchanger
Expansion valve；The connection relation of each equipment is：The D mouths of the exhaust outlet access four-way reversing valve 16 of compressor 26, four-way reversing valve 16
E mouths access case tube heat exchanger 17 first port, case tube heat exchanger 17 second port access check valve 11 entrance, unidirectionally
The entrance of the outlet access liquid storage device 12 of valve 11, the export pipeline of liquid storage device 12 are divided into two-way, and the first pipeline is divided into three stand pipes
Road is respectively connected to expansion valve (5,7,9) entrance of each group finned heat exchanger first port setting, each expansion valve (5,7,9) outlet
Road is divided into two-way and is respectively connected to the entrance of corresponding solenoid valve (4,6,8) and the first port of finned heat exchanger (1,2,3), each electricity
The outlet of magnet valve (4,6,8) merges into pipeline access check valve 11 and exports pipeline section between 12 entrance of liquid storage device, each wing
The second port of piece heat exchanger (1,2,3) merges into the C mouths of a pipeline access four-way reversing valve 16, the S of four-way reversing valve 16
The entrance of mouth access gas-liquid separator 21, the air entry of the outlet access compressor 26 of gas-liquid separator 21, liquid storage device 12 go out
Second pipeline of mouth pipeline passes sequentially through access 17 second port of case tube heat exchanger and check valve after solenoid valve 19 and expansion valve 18
Pipeline section between 11 entrances.
Nowadays it is each area increasingly focus on environmental protection, successively eliminate high pollution, highly energy-consuming equipment, at present energetically
Promote air source heat pump and be used for heat supply and warm oneself, have a very big market space in northern China, but China it is extensively vast, temperature has significantly
Difference, such as air source heat pump in northeast is promoted the use of, common air source heat pump cannot be competent at.It will in severe cold
Area ensures comfortable heating temperature, it is necessary to which heat pump refrigeration system high-low pressure span is larger, needs multi-stage compression system complete
Into, but multi-stage compression system such as can cause equipment cost higher again with superposition type system, control the appearance of the problems such as difficult.
Invention content
The purpose of the invention is to overcome the shortcoming of prior art, propose a kind of based on single machine compression with double stage machine
Ultra-low temperature air source heat pump, the air source heat pump can stablize heating under large range of environment temperature (- 30 DEG C~15 DEG C), if
Standby cost is relatively low, and unit allocation is simple.
To achieve these goals, the present invention adopts the following technical scheme that：
A kind of ultra-low temperature air source heat pump based on single machine compression with double stage machine, including case tube heat exchanger (17), liquid storage device
(12), gas-liquid separator (21), multigroup finned heat exchanger (1,2,3), four-way reversing valve (16), check valve (11), multiple electromagnetism
Valve, multiple expansion valves and connecting line；The first solenoid valve and the are respectively equipped in the first port of each group finned heat exchanger
One expansion valve；The air source heat pump further include single machine compression with double stage machine (22), Horizontal oil separator (23), oil cooler (24),
Economizer (14) and pressure maintenance valve (20)；The connection relation of each equipment is：
The exhaust outlet of single machine compression with double stage machine (22) passes sequentially through Horizontal oil separator (23) and pressure maintenance valve (20) connects
Enter the D mouths of four-way reversing valve (16), the first port (a) of the E mouths access case tube heat exchanger (17) of four-way reversing valve (16), package
The second port (b) of heat exchanger (17) accesses the entrance of liquid storage device (12) by check valve (11), and the outlet of liquid storage device (12) connects
Enter the third port (c) of economizer (14)；
4th port (d) pipeline of economizer (14) is divided into two-way, passes through respectively wherein the first pipeline is divided into a plurality of sub- road
First expansion valve of each group finned heat exchanger first port is connected with corresponding finned heat exchanger, and the second of each group finned heat exchanger
Port merges into the C mouths of a pipeline access four-way reversing valve (16), and the S mouths of four-way reversing valve (16) pass through gas-liquid separator
(21) air entry of access single machine compression with double stage machine (22), in single machine compression with double stage machine (22) exhaust outlet and Horizontal oil separator
(23) pipeline section between the pipeline section between air inlet and the outlet of single machine compression with double stage machine (22) air entry and gas-liquid separator (21)
5th solenoid valve (15) is set, is arranged on the first solenoid valve (4,6,8) entrance access phase of each group finned heat exchanger first port
Pipeline section between the finned heat exchanger first port answered and the first expansion valve outlet, the outlet of each first solenoid valve (4,6,8)
Road merges into the pipeline section between pipeline access check valve (11) outlet and liquid storage device (12) entrance；The 4th of economizer (14)
Second pipeline of port (d) pipeline passes sequentially through second solenoid valve (19) and the second expansion valve (18) accesses case tube heat exchanger afterwards
(17) pipeline section between second port (b) and check valve (11) entrance；
First port (a) pipeline of economizer (14) is divided into the economizer that two-way is respectively connected to single machine compression with double stage machine (22)
Mouthful and pressure maintenance valve (20) balance pipe, second port (b) mouth of economizer (14) pass sequentially through third expansion valve (13) and
Third solenoid valve (10) accesses the pipeline section between liquid storage device (12) outlet and economizer (14) third port (c) mouth afterwards；
The oil outlet pipeline of Horizontal oil separator (23) is divided into the first port (a) that two-way is respectively connected to oil cooler (24)
With the entrance of the 4th solenoid valve (25), the outlet of the 4th solenoid valve (25) and second port (b) pipeline of oil cooler (24) converge
The oiler of a piece pipeline access single machine compression with double stage machine (22) of synthesis, the 4th port (d) the connection package of oil cooler (24)
The third port (c) of heat exchanger (17)；Air-conditioning system water is flowed by the third port (c) of oil cooler (24), is exchanged heat from package
The 4th port (d) outflow of device (17).
Further, a period of time is opened when the 5th solenoid valve (15) starts for single machine compression with double stage machine (22), is used
In pressure balance；The third solenoid valve (10) judges to switch according to low pass high-low pressure pressure difference, when high-low pressure pressure difference is more than or waits
It opens when setup pressure value, is closed when high-low pressure pressure difference is less than setup pressure value；4th solenoid valve (25) is according to institute
Judge switch in the oil temperature of pipeline detection, close when oil temperature is higher than set temperature, opened when oil temperature is less than set temperature；
When the air source heat pump is in heating mode：The solenoid valve (4,6,8) of each group finned heat exchanger first port and institute
It is normally closed to state second solenoid valve (19)；The four-way reversing valve (16) for electricity condition, D mouthfuls connect with E mouthfuls, and C mouthfuls connect with S mouthfuls；
When the air source heat pump is in refrigeration mode：The solenoid valve (4,6,8) of each group finned heat exchanger first port and institute
It is normally opened to state second solenoid valve (19)；The four-way reversing valve (16) is power failure state, and D mouthfuls connect with C mouthfuls, and E mouthfuls connect with S mouthfuls.
The features of the present invention and useful achievement：
The present invention is using single machine compression with double stage machine, for air source heat pump product, and uses economy in system design
The superheated refrigerant that stage compressor is discharged is cooled to and closes on saturation gaseous state by device, enters back into split-compressor compression, reduces pressure
Contracting machine, being capable of stable heating under ultra-low temperature surroundings in the power consumption of high pressure ratio.
The air source heat pump suitable environment temperature range of the present invention is broad；Air source heat pump is solved in cold district power consumption
Greatly, heating effect is bad, solves in the non-serviceable problem in severe cold area.Mostly a kind of selection is provided for northern central heating,
It is economic and environment-friendly.
Description of the drawings
Fig. 1 is a kind of existing air source heat pump principle schematic based on single-stage compressor；
Fig. 2 is the principle schematic of the air source heat pump of the embodiment of the present invention.
Specific embodiment
A kind of ultra-low temperature air source heat pump combination accompanying drawings and embodiments based on single machine compression with double stage machine proposed by the present invention
Detailed description are as follows：
The schematic diagram of the embodiment of the present invention as shown in Fig. 2, the air source heat pump include case tube heat exchanger 17, liquid storage device 12,
Gas-liquid separator 21, multigroup finned heat exchanger (1,2,3, the present embodiment is equipped with 3 groups of finned heat exchangers), four-way reversing valve 16, list
To valve 11, multiple solenoid valves, multiple expansion valves and connecting line；It is respectively equipped in the first port of each group finned heat exchanger
First solenoid valve (4,6,8) and the first expansion valve (5,7,9)；The air source heat pump further includes single machine compression with double stage machine 22, horizontal
Oil eliminator 23, oil cooler 24, economizer 14 and pressure maintenance valve 20；The connection relation of each equipment is：
The air inlet of the exhaust outlet access Horizontal oil separator 23 of single machine compression with double stage machine 22, Horizontal oil separator 23 go out
Gas port cut-in pressure maintains the entrance of valve 20, the D mouths of the outlet access four-way reversing valve 16 of pressure maintenance valve 20, four-way reversing valve
The a mouths of 16 E mouths access case tube heat exchanger 17, the entrance of the b mouths access check valve 11 of case tube heat exchanger 17, check valve 11 go out
The entrance of mouth access liquid storage device 12, the c mouths of the outlet access economizer 14 of liquid storage device 12；
The d mouth pipelines of economizer 14 are divided into two-way, are changed respectively by each group fin wherein the first pipeline is divided into a plurality of sub- road
First expansion valve of hot device first port connects that (in the present embodiment, the first pipeline is divided into three strips with corresponding finned heat exchanger
Road respectively by expansion valve 5, expansion valve 7, expansion valve 9 access finned heat exchanger 1, finned heat exchanger 2, finned heat exchanger 3 the
Single port), the second port of each group finned heat exchanger merges into the C mouths of a pipeline access four-way reversing valve 16, four-way commutation
The entrance of the S mouth accesses gas-liquid separator 21 of valve 16, the air-breathing of the outlet access single machine compression with double stage machine 22 of gas-liquid separator 21
Mouthful, pipeline section and single machine compression with double stage machine 22 between 23 air inlet of 22 exhaust outlet of single machine compression with double stage machine and Horizontal oil separator
Pipeline section between air entry and gas-liquid separator 21 export sets solenoid valve 15, is arranged on each group finned heat exchanger first port
Electromagnetic valve entrance access between corresponding finned heat exchanger first port and the first expansion valve outlet pipeline section (in the present embodiment,
Solenoid valve 4, solenoid valve 6,8 entrance of solenoid valve are respectively connected to 1 first port of finned heat exchanger and expansion valve 5 exports, fin exchanges heat
Pipeline section between 2 first port of device and expansion valve 7 export, 3 first port of finned heat exchanger and expansion valve 9 export), each solenoid valve
The export pipeline of (4,6,8) merges into pipeline access check valve 11 and exports pipeline section between 12 entrance of liquid storage device；It is economical
The entrance of the second pipeline access solenoid valve 19 of the d mouth pipelines of device 14, the entrance of the outlet access expansion valve 18 of solenoid valve 19 are swollen
Pipeline section between 11 entrance of b mouths and check valve of the outlet access case tube heat exchanger 17 of swollen valve 18；
The a mouth pipelines of economizer 14 are divided into two-way and are respectively connected to the economizer mouth of single machine compression with double stage machine 22 and pressure maintenance
The balance pipe of valve 20, the entrance of the b mouth accesses expansion valve 13 of economizer 14, the outlet access solenoid valve 10 of expansion valve 13 enter
Mouthful, the outlet access liquid storage device 12 of solenoid valve 10 exports the pipeline section between the c of economizer 14 mouths；
The oil outlet pipeline of Horizontal oil separator 23 is divided into two-way and is respectively connected to a mouths of oil cooler 24 and solenoid valve 25
Entrance, the outlet of solenoid valve 25 and the b mouth pipelines of oil cooler 24 merge into a pipeline and access single machine compression with double stage machine 22
Oiler, the c mouths of the d mouths connection case tube heat exchanger 17 of oil cooler 24；Air-conditioning system water is flowed by the c mouths of oil cooler 24,
It is flowed out from the d mouths of case tube heat exchanger 17.
This air source heat pump, which has, freezes and heats two kinds of operating modes, is respectively described below：
When the air source heat pump is in heating mode, solenoid valve 4, solenoid valve 6, solenoid valve 8, solenoid valve 19 are normally closed；Electricity
Magnet valve 10 judges to switch according to system high-low pressure pressure difference, is opened when high-low pressure pressure difference is greater than or equal to 10bar, when high-low pressure pressure
Difference is closed when being less than 10bar；It is opened 10 seconds when solenoid valve 15 is compressor start, for pressure balance；Four-way reversing valve 16 is
Electricity condition is obtained, D mouthfuls connect with E mouthfuls, and C mouthfuls connect with S mouthfuls；Solenoid valve 25 judges to switch according to the oil temperature of place pipeline detection,
It closes when oil temperature is higher than 70 DEG C, is opened when oil temperature is less than 50 DEG C.The refrigerant and lubrication of high temperature and pressure in heat pump system
Oily mixed gas is entered the air inlet of Horizontal oil separator 23 by the exhaust outlet of single machine compression with double stage machine 22, in Horizontal oil separator
The refrigerant gas and lubricating oil separation of high temperature and pressure in 23；The refrigerant gas of high temperature and pressure goes out from Horizontal oil separator 23
Gas port enters the entrance of pressure maintenance valve 20, and the effect of pressure maintenance valve 20 is to ensure that system exhaust reaches preset pressure and could arrange
Go out, maintain the high-low pressure pressure ratio of compressor 22；The refrigerant gas of high temperature and pressure enters four-way by the outlet of pressure maintenance valve 20
The D mouths of reversal valve 16, the effect of four-way reversing valve 16 are switching refrigerant flow directions, realize cutting for refrigeration mode and heating mode
It changes；In a heating mode, the D mouths of four-way reversing valve 16 are connected with E mouthfuls, enter D mouthfuls of four-way reversing valve from pressure maintenance valve 20
The refrigerant gas of high temperature and pressure is from E mouthfuls of four-way reversing valve out into a mouths of case tube heat exchanger 17；The refrigerant of high temperature and pressure
It exchanges heat, rejects heat in air-conditioner circulating water, while the refrigeration of high temperature and pressure with air-conditioner circulating water in case tube heat exchanger 17
Agent gas is condensed into the refrigerant liquid of high temperature and pressure, then is discharged into check valve 11, check valve from the b mouths of case tube heat exchanger 17
11 can only one direction open, forward direction circulation, reversely it is obstructed；The refrigerant liquid of high temperature and pressure enters liquid storage device by check valve 11
12, liquid storage device for the excessive refrigerant of storage system and ensure refrigerant before expansion valve throttling can effective fluid-tight, avoid dodging
Send out influence of the refrigerant vapour to restriction effect；The refrigerant liquid of high temperature and pressure is discharged by liquid storage device 12, by main hydraulic pipe road
Into the c mouths of economizer 14, taken on the main hydraulic pipe road before liquid storage device 12 and economizer 14 all the way branch line pass through electromagnetism
Valve 10 and expansion valve 13, the high-temperature high-pressure refrigerant liquid of sub-fraction throttle by this branch into the gas-liquid two of medium temperature and medium pressure
Phase mixture, into the b mouths of economizer 14, this two-way refrigerant exchanges heat, the refrigerant liquid of the high temperature and pressure on main hydraulic pipe road
Body passes through economizer 14, is cooled to the subcooled liquid of high pressure, and the medium temperature and medium pressure refrigerant after the throttling of branch passes through economizer
14, the saturation gaseous refrigerant of middle pressure is evaporated to, the middle pressure chamber of single machine compression with double stage machine 22 is exited into from a mouths of economizer 14
It is mixed with the discharge refrigerant that heat is pressed through in stage compressor, cools down the delivery temperature after one stage of compression, be sent into after mixing
Split-compressor compresses, and the high pressure refrigerant liquid after the supercooling of economizer 14 is discharged by the d mouths of economizer 14, is divided into three
Branch is respectively by expansion valve 5, expansion valve 7, expansion valve 9) it throttles into the gas-fluid two-phase mixture of low-temp low-pressure, then respectively enter
First, second, third finned heat exchanger (1,2,3) exchanges heat with outside air, by absorbing the heat in air, low-temp low-pressure
Refrigerant be evaporated to the overheated gas of low pressure, then merge into the C mouths that a pipeline enters four-way reversing valve 16；Four-way changes at this time
It is connected to the C mouths of valve 16 with S mouthfuls；The superheated refrigerant gas of low pressure is discharged into gas-liquid separation by the S mouths of four-way reversing valve 16
Device 21, the effect of gas-liquid separator are to detach not evaporate complete refrigerant liquid, prevent refrigerant liquid from entering compressor and make
Into Wet Compression, refrigerant liquid is isolated in gas-liquid separator 21, discharges the refrigerant gas of low pressure again by single machine two-stage pressure
22 air entry of contracting machine sucks, and completes the cycle of refrigerant.The flow process of lubricating oil be by Horizontal oil separator 23 separation after,
It is flowed out from the oil outlet of Horizontal oil separator 23, to prevent lubricating oil temperature excessively high, system is provided with oil cooler 24, horizontal oil
The lubricating oil of 23 oil outlet of separator discharge enters a mouths of oil cooler 24, lubricating oil in oil cooler with air-conditioner circulating water
Heat exchange by b mouths of oil cooler 24 is discharged into compressor oiler after cooled, in system designs when Lubricating Oil Temperature not
Gao Shi, setting oil circuit bypass, and avoid unnecessary oil cooling but, and solenoid valve 25 plays the role of oil circuit bypass.It is refrigerant above
And the flow process of lubricating oil in a heating mode.
When the air source heat pump is in refrigeration mode, solenoid valve 4, solenoid valve 6, solenoid valve 8, solenoid valve 19 are normally opened；Electricity
Magnet valve 10 judges to switch according to low pass high-low pressure pressure difference, is opened when high-low pressure pressure difference is greater than or equal to 10bar, when high-low pressure pressure
Difference is closed when being less than 10bar；It is opened 10 seconds when solenoid valve 15 is compressor start, for pressure balance；Four-way reversing valve 16 is
Power failure state, D mouthfuls connect with C mouthfuls, and E mouthfuls connect with S mouthfuls；Solenoid valve 25 judges to switch according to the oil temperature of place pipeline detection,
It closes when oil temperature is higher than 70 DEG C, is opened when oil temperature is less than 50 DEG C.The refrigerant and lubrication of high temperature and pressure in heat pump system
Oily mixed gas is entered the air inlet of Horizontal oil separator 23 by 22 exhaust outlet of single machine compression with double stage machine, in Horizontal oil separator 23
The refrigerant gas and lubricating oil separation of interior high temperature and pressure；The refrigerant gas of high temperature and pressure is from the outlet of Horizontal oil separator 23
Mouth enters the entrance of pressure maintenance valve 20, and the effect of pressure maintenance valve 20 is to ensure that system exhaust reaches preset pressure and could arrange
Go out, maintain the high-low pressure pressure ratio of compressor；The refrigerant gas of high temperature and pressure is changed by the outlet of pressure maintenance valve 20 into four-way
To the D mouths of valve 16, the effect of four-way reversing valve 16 is switching refrigerant flow direction, realizes the switching of refrigeration mode and heating mode；
In cooling mode, the D mouths of four-way reversing valve 16 are connected with C mouthfuls, and the high temperature of D mouthfuls of four-way reversing valve is entered from pressure maintenance valve 20
The refrigerant gas of high pressure is out divided into three branches from C mouthfuls of four-way reversing valve and respectively enters the heat exchange of first, second, third fin
Device (1,2,3) exchanges heat with outside air, rejects heat in air, the refrigerant of high temperature and pressure is condensed into the refrigeration of high pressure
Agent liquid；Again respectively by solenoid valve 4, solenoid valve 6, solenoid valve 8) after merge into a pipeline and enter liquid storage device 12, liquid storage device
For the excessive refrigerant of storage system and ensure refrigerant expansion valve throttling before can effective fluid-tight, avoid shwoot refrigerant steam
Influence of the gas to restriction effect；The refrigerant liquid of high temperature and pressure is discharged by liquid storage device 12, enters economizer by main hydraulic pipe road
14 c mouths, taken on the main hydraulic pipe road before liquid storage device 12 and economizer 14 all the way branch line by solenoid valve 10 and expansion
Valve 13, the high-temperature high-pressure refrigerant liquid of sub-fraction throttle by this branch into the gas-fluid two-phase mixture of medium temperature and medium pressure,
Into the b mouths of economizer 14, this two-way refrigerant exchanges heat, and the refrigerant liquid of the high temperature and pressure on main hydraulic pipe road is by economical
Device 14 is cooled to the subcooled liquid of high pressure, and the medium temperature and medium pressure refrigerant after the throttling of branch passes through economizer 14, in being evaporated to
The saturation gaseous refrigerant of pressure exits into the middle pressure chamber and one stage of compression of single machine compression with double stage machine 22 from a mouths of economizer 14
The discharge refrigerant mixing of heat is pressed through in machine, cools down the delivery temperature after one stage of compression, split-compressor is being sent into after mixing
Compression, the high pressure refrigerant liquid after the supercooling of economizer 14 are discharged by the d mouths of economizer 14, pass through solenoid valve 19 and expansion
Valve 18, the two-phase refrigerant mixture for throttling into low-temp low-pressure enter the b mouths of case tube heat exchanger 17, exchange heat with air-conditioner circulating water,
By absorbing the heat in air-conditioner circulating water, the refrigerant of low-temp low-pressure is evaporated to the overheated gas of low pressure, commutates into four-way
The E mouths of valve 16；The E mouths of four-way reversing valve 16 are connected with S mouthfuls at this time；The superheated refrigerant gas of low pressure is by four-way reversing valve 16
S mouthfuls are discharged into gas-liquid separator 21, and the effect of gas-liquid separator is to detach not evaporate complete refrigerant liquid, prevents from freezing
Agent liquid enters compressor and causes Wet Compression, and refrigerant liquid is isolated in gas-liquid separator 21, discharges the refrigerant of low pressure
Gas is sucked again by 22 air entry of unit double-stage compressor, completes the cycle of refrigerant.The flow process of lubricating oil is by sleeping
After formula oil eliminator 23 detaches, flowed out from the oil outlet of Horizontal oil separator 23, to prevent lubricating oil temperature excessively high, system setting
Oil cooler 24, the lubricating oil of 23 oil outlet of Horizontal oil separator discharge enter a mouths of oil cooler 24, and lubricating oil is in oil cooling
But it exchanges heat in device with air-conditioner circulating water, compressor oiler is discharged by the b mouths of oil cooler 24 after being cooled, is set in system
In meter when Lubricating Oil Temperature is not high, setting oil circuit bypasses, and avoids unnecessary oil cooling but, and solenoid valve 25 plays oil circuit bypass
Effect.It is the flow process of refrigerant and lubricating oil in cooling mode above.
The air source heat pump of the present invention can realize single compressor Two-stage Compression, and system high-low pressure pressure ratio is big, can adapt to
Low temperature environment can stablize heating under -30 DEG C of low temperature environment, and economic benefit is apparent.
The specific implementation of critical piece of the present invention is described as follows：
Critical piece single machine compression with double stage machine, Horizontal oil separator, four-way reversing valve, case tube heat exchanger, gas in the present invention
Liquid/gas separator, liquid storage device, economizer, finned heat exchanger, oil cooler, solenoid valve, expansion valve, pressure maintenance valve, check valve are equal
For commercially available matured product.
Embodiment：
1st, single machine compression with double stage machine determines compressor air-discharging amount come really according to the mass flow of refrigeration system and unit load
Surely compressor model is selected, the present embodiment selects compressor as multiple contents board SRT413 model single machine compression with double stage machines；
2nd, Horizontal oil separator selects deterministic type according to mean flow rate in compressor air-discharging amount and Horizontal oil separator
Number；
3rd, four-way reversing valve, according to refrigerant system capacity come type selecting；
4th, case tube heat exchanger, according to the heating capacity of heat pump main frame, the physical characteristic of heat exchanger both sides heat transferring medium and heat exchange
The heat transfer properties of material carry out Lectotype and calculation；
5th, gas-liquid separator, according to the refrigerant charge of cooling system system and refrigerating capacity number it is suitable to select
Model；
6th, liquid storage device, according to the refrigerant charge of cooling system system number and system pipeline size it is suitable to select
Model；
7th, economizer, according to pressure heat exchange amount in refrigeration system and the temperature for the both sides that exchange heat come Lectotype and calculation；
8th, finned heat exchanger, according to the size of the refrigerating capacity of refrigeration system, the physical characteristic of heat exchanger both sides heat transferring medium
And heat exchange material and fin material and spacing of fin size carry out Lectotype and calculation；
9th, oil cooler, according to oil mass and heat transfer temperature difference, the water side temperature difference, the heat transfer properties Lectotype and calculation of heat exchanger tube material；
10th, solenoid valve, expansion valve, check valve, according to system loading and pipeline structure type selecting；
11st, pressure maintenance valve is compressor accessory, and producer matches；
12nd, other pipelines valve according to pipeline and it needs to be determined that.
The foregoing is merely illustrative of the preferred embodiments of the present invention, and non-limiting protection scope of the present invention, all in this hair
Any modification made within bright spirit and principle, equivalent replacement, improve etc., in the protection scope of the present invention included.
Claims (2)
1. a kind of ultra-low temperature air source heat pump based on single machine compression with double stage machine, including case tube heat exchanger (17), liquid storage device (12),
It is gas-liquid separator (21), multigroup finned heat exchanger (1,2,3), four-way reversing valve (16), check valve (11), multiple solenoid valves, more
A expansion valve and connecting line；The first solenoid valve and the first expansion are respectively equipped in the first port of each group finned heat exchanger
Valve；It is characterized in that, the air source heat pump further includes single machine compression with double stage machine (22), Horizontal oil separator (23), oil cooler
(24), economizer (14) and pressure maintenance valve (20)；The connection relation of each equipment is：
The exhaust outlet of single machine compression with double stage machine (22) passes sequentially through Horizontal oil separator (23) and pressure maintenance valve (20) access four
The D mouths of logical reversal valve (16), the first port (a) of the E mouths access case tube heat exchanger (17) of four-way reversing valve (16), package heat exchange
The second port (b) of device (17) accesses the entrance of liquid storage device (12), the outlet access warp of liquid storage device (12) by check valve (11)
The third port (c) of Ji device (14)；
4th port (d) pipeline of economizer (14) is divided into two-way, wherein the first pipeline is divided into a plurality of sub- road passes through each group respectively
First expansion valve of finned heat exchanger first port is connected with corresponding finned heat exchanger, the second port of each group finned heat exchanger
The C mouths of a pipeline access four-way reversing valve (16) are merged into, the S mouths of four-way reversing valve (16) are connect by gas-liquid separator (21)
Enter the air entry of single machine compression with double stage machine (22), in single machine compression with double stage machine (22) exhaust outlet and Horizontal oil separator (23) air inlet
The pipeline section setting the 5th between pipeline section and single machine compression with double stage machine (22) air entry and gas-liquid separator (21) outlet between mouthful
Solenoid valve (15), the first solenoid valve (4, the 6,8) entrance for being arranged on each group finned heat exchanger first port access corresponding fin
Pipeline section between heat exchanger first port and the first expansion valve outlet, the export pipeline of each first solenoid valve (4,6,8) merge into
A piece pipeline access check valve (11) exports the pipeline section between liquid storage device (12) entrance；4th port (d) of economizer (14)
Second pipeline of pipeline passes sequentially through that second solenoid valve (19) and the second expansion valve (18) access case tube heat exchanger (17) afterwards
Pipeline section between Two-port netwerk (b) and check valve (11) entrance；
First port (a) pipeline of economizer (14) be divided into two-way be respectively connected to single machine compression with double stage machine (22) economizer mouth and
The balance pipe of pressure maintenance valve (20), second port (b) mouth of economizer (14) pass sequentially through third expansion valve (13) and third
Solenoid valve (10) accesses the pipeline section between liquid storage device (12) outlet and economizer (14) third port (c) mouth afterwards；
The oil outlet pipeline of Horizontal oil separator (23) is divided into the first port (a) and that two-way is respectively connected to oil cooler (24)
The entrance of four solenoid valves (25), the outlet of the 4th solenoid valve (25) and second port (b) pipeline of oil cooler (24) merge into
The oiler of a piece pipeline access single machine compression with double stage machine (22), the 4th port (d) the connection package heat exchange of oil cooler (24)
The third port (c) of device (17)；Air-conditioning system water is flowed by the third port (c) of oil cooler (24), from case tube heat exchanger
(17) the 4th port (d) outflow.
2. air source heat pump according to claim 1, which is characterized in that the 5th solenoid valve (15) is single machine two-stage pressure
A period of time is opened when contracting machine (22) starts, for pressure balance；The third solenoid valve (10) is according to low pass high-low pressure pressure difference
Judge switch, opened when high-low pressure pressure difference is greater than or equal to setup pressure value, when high-low pressure pressure difference is less than setup pressure value
It closes；4th solenoid valve (25) judges to switch according to the oil temperature of place pipeline detection, when oil temperature is higher than set temperature
It closes, is opened when oil temperature is less than set temperature；
When the air source heat pump is in heating mode：The solenoid valve (4,6,8) of each group finned heat exchanger first port and described
Two solenoid valves (19) are normally closed；The four-way reversing valve (16) for electricity condition, D mouthfuls connect with E mouthfuls, and C mouthfuls connect with S mouthfuls；
When the air source heat pump is in refrigeration mode：The solenoid valve (4,6,8) of each group finned heat exchanger first port and described
Two solenoid valves (19) are normally opened；The four-way reversing valve (16) is power failure state, and D mouthfuls connect with C mouthfuls, and E mouthfuls connect with S mouthfuls.
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| CN109210827A (en) * | 2018-08-30 | 2019-01-15 | 北京工业大学 | A kind of heat pipe-type air source heat pump with lubrication oil circulation |
| CN110260560A (en) * | 2019-07-19 | 2019-09-20 | 北京金茂绿建科技有限公司 | A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump |
| CN110411054A (en) * | 2019-07-09 | 2019-11-05 | 南京天加环境科技有限公司 | A kind of combustion-gas thermal pump air-conditioning system reducing lubricating oil temperature and control method |
| CN111023620A (en) * | 2018-10-09 | 2020-04-17 | 山东新华能节能科技有限公司 | Vortex type air source heat pump two-stage system |
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| CN110220326B (en) * | 2019-02-26 | 2024-01-23 | 北京华电东晟科技有限公司 | Automatic variable-load air source heat pump for preparing high-temperature hot water from ultralow-temperature air |
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