CN106016873B - A kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping - Google Patents
A kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping Download PDFInfo
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- CN106016873B CN106016873B CN201610369016.9A CN201610369016A CN106016873B CN 106016873 B CN106016873 B CN 106016873B CN 201610369016 A CN201610369016 A CN 201610369016A CN 106016873 B CN106016873 B CN 106016873B
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
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- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses the air source heat pump defrosting systems that a kind of two stages of compression switches to part binary overlapping, including indoor heat exchanger, outdoor heat exchanger, gas-liquid separator, compressor, high-pressure reservoir, four-way reversing valve, economizer, shut-off valve, defrosting branch and concurrent heating branch；The both ends of first defrosting branch are separately connected the entrance of outdoor heat exchanger and gas-liquid separator；The both ends of second defrosting branch are separately connected low pressure compressor exhaust outlet and economizer cooling coil entrance；One end of concurrent heating branch connects four-way reversing valve, and the other end is passed directly into high-pressure reservoir liquid phase, and branch road installation concurrent heating solenoid valve, concurrent heating sensor is placed in the liquid phase of high-pressure reservoir.The flow of two-stage compression system has been transformed by the present invention, it can be achieved that heating is run simultaneously with defrosting, and heating capacity is unattenuated, and working conditions of compressor does not change, small to system shock, reduces energy consumption, is realized under the premise of ensureing indoor comfort degree energy-efficient.
Description
Technical field
The present invention relates to air-conditioner defrosting technical field, more particularly to a kind of air source heat pump defrosting system.
Background technology
Air source heat pump have the advantages that energy-saving and environmental protection, can round-the-clock use, but generally existing frosting in cold climates
The phenomenon that, therefore air-conditioning outdoor unit after running a period of time just has to switch over defrosting mode and carries out defrost, compressor cannot
It heats simultaneously, this can seriously affect indoor temperature.
Several Defrost technologies used by net for air-source heat pump units at present, such as：Four-way reversing valve inverse defrosting technology is deposited
It is big on system shock, influence indoor temperature and the shortcomings that human comfort；There is defrosting speed for hot gas bypass defrosting technology
The shortcomings that spending slowly and working conditions of compressor caused to change；The shortcomings that electric heated defrosting increases there is energy consumption, not can solve
Ensure this contradiction of indoor heating and outdoor defrosting；Defect of the existing technology becomes urgently to be resolved hurrily one in this field
Key technical problem.
Invention content
The purpose of the present invention is to provide the air source heat pump defrosting systems that a kind of two stages of compression switches to part binary overlapping
System, with solve existing for existing Defrost technology it is big on system shock, influence indoor temperature, defrosting speed is slow, energy consumption is increased asks
Topic.The present invention is directed to the uniqueness of two stages of compression air source heat pump system, and proposition is added on the basis of two-stage compression system
First defrosting branch, the second defrosting branch and concurrent heating branch, by the way that two-stage compression system is switched to part binary overlapping
System defrosts.
To achieve the goals above, the present invention adopts the following technical scheme that：
A kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping, including indoor heat exchanger, room
External heat exchanger, gas-liquid separator, high-pressure reservoir, economizer and four-way reversing valve), first defrosting branch, second defrosting branch
With concurrent heating branch；One end of indoor heat exchanger is connected to the inlet of high-pressure reservoir by the first check valve；High-pressure reservoir
Liquid outlet be connected to the ends o of liquid cyclone, the ends m of liquid cyclone are connected to the ends g of economizer by the 6th shut-off valve,
The ends n of liquid cyclone are connected to the ends f of economizer by the 4th electric expansion valve, and the ends h of economizer are swollen by the second electronics
Swollen valve is connected to one end of outdoor heat exchanger；The other end of outdoor heat exchanger is divided to two branches, a branch to end by third
Valve is connected to the ends a of four-way reversing valve, one end of another branch connection the first defrosting branch；The ends d of four-way reversing valve connect
To the import of gas-liquid separator, the outlet of gas-liquid separator is connected to the air entry of low pressure compressor, the exhaust of low pressure compressor
Mouth is divided to two branches, a branch to be connected to the ends j of steam flow mixing device by the first shut-off valve, and another branch connection second removes
One end of white branch, the ends i and the ends k of steam flow mixing device are connected respectively to the air entry of high pressure compressor and the ends e of economizer, high
The exhaust outlet of pressure compressor is connected to the ends b of four-way reversing valve, and the ends c of four-way reversing valve are connected to the another of indoor heat exchanger
End；Wherein, it is parallel with the first electric expansion valve on the first check valve, the second check valve and are parallel on the second electric expansion valve
Five shut-off valves.
Further, the other end of the first defrosting branch is connected to the entrance of gas-liquid separator, the first defrosting branch road according to
Secondary to be equipped with the 4th shut-off valve, third electric expansion valve, evaporation coil, evaporation coil is placed in the liquid phase of high-pressure reservoir.
Further, the other end of the second defrosting branch is connected to the ends g of economizer, and the second defrosting branch road is equipped with the
One shut-off valve.
Further, one end of concurrent heating branch is connected to the ends c of four-way reversing valve, and the other end is connected to high-pressure reservoir
In liquid, concurrent heating branch road is equipped with concurrent heating solenoid valve, is equipped in the gas phase of high-pressure reservoir and is opened for controlling concurrent heating solenoid valve
The concurrent heating sensor of degree.
Further, a kind of two stages of compression switches to the heating of the air source heat pump defrosting system of part binary overlapping
Pattern includes main heating circulation loop and auxiliary heating branch, when heating mode is run, the first shut-off valve, third shut-off valve, the 6th
Shut-off valve is opened, and the second shut-off valve, the 4th shut-off valve, the 5th shut-off valve are closed, the first electric expansion valve, third electric expansion valve
No power, the second electric expansion valve, the 4th electric expansion valve are powered, concurrent heating solenoid valve no power, the ends b of four-way reversing valve and c
End connection, the ends a are connected to the ends d；
A kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping in a heating mode
Main heating circulation loop refrigerant flow direction is：The shut-off valve of low-pressure compressor outlet → first) → steam mixed flow mouth the ends j → steam
The ends bc → indoor heat exchanger → first check valve → high-pressure reservoir of the ends i → high pressure compressor → four-way reversing valve of mixed flow mouth
H end of the ends o of → liquid cyclone into the ends g of the ends m → six shut-off valves → economizer of → liquid cyclone into → economizer
→ the second electric expansion valve → outdoor heat exchanger → third shut-off valve → ends four-way reversing valve ad → gas-liquid separator → low pressure pressure
Contracting machine entrance.
Further, a kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping and is heating
Auxiliary heating branch refrigerant flow direction under pattern is：The ends f of the ends n → four electric expansion valves → economizer of liquid cyclone into
Cycle is completed at the ends k of e → steam mixer of → economizer.
Further, a kind of two stages of compression switches to the defrosting of the air source heat pump defrosting system of part binary overlapping
Pattern includes heating cycle and defrosting cycle, and when defrosting mode is run, the second shut-off valve, the 4th shut-off valve, the 5th shut-off valve are opened
It opening, the first shut-off valve, third shut-off valve, the 6th shut-off valve are closed, the first electric expansion valve, the second electric expansion valve no power,
Third electric expansion valve, the 4th electric expansion valve are powered, and concurrent heating solenoid valve no power, the ends four-way reversing valve b are connected to the ends c；
Heating circularly cooling agent in defrost mode flows to：High pressure compressor → the ends four-way reversing valve bc → interior is changed
The electronic expansion of ends n of the ends o → liquid cyclone of hot device → the first check valve → high-pressure reservoir → liquid cyclone → the 4th
The ends e → high pressure compressor of the ends f → economizer of valve → economizer completes heating cycle.
Further, defrosting circularly cooling agent flow direction in defrost mode is：The shut-off valve of low pressure compressor → second →
The ends h → five shut-off valves → outdoor heat exchanger → four shut-off valves → third electric expansion valve of the ends g → economizer of economizer
→ evaporation coil → gas-liquid separator → low pressure compressor completes defrosting cycle.
Further, a kind of two stages of compression switches to the concurrent heating of the air source heat pump defrosting system of part binary overlapping
Pattern includes heating circulation loop and concurrent heating branch, when concurrent heating mode operation, the first shut-off valve, third shut-off valve, the 6th cut-off
Valve is opened, and the second shut-off valve, the 4th shut-off valve, the 5th shut-off valve are closed, and the first electric expansion valve, third electric expansion valve are obstructed
Electricity, the second electric expansion valve, the 4th electric expansion valve are powered, and the ends b of four-way reversing valve are connected to the ends c, the ends a are connected to the ends d, are mended
Thermoelectrical magnetic valve is powered；
Heating circulation loop refrigerant flow direction under concurrent heating pattern is：Low-pressure compressor outlet → the first shut-off valve → steaming
The ends bc → indoor heat exchanger → the of the ends i → high pressure compressor → four-way reversing valve of the ends j of vapour mixed flow mouth → steam mixed flow mouth
M end → six shut-off valves → economizer of the ends o of one check valve → high-pressure reservoir → liquid cyclone into → liquid cyclone
The ends g into the ends h → second electric expansion valve → outdoor heat exchanger → third shut-off valve → ends four-way reversing valve ad of → economizer
→ gas-liquid separator → low pressure compressor entrance.
Further, the concurrent heating branch refrigerant flow direction under concurrent heating pattern is：The ends four-way reversing valve c → concurrent heating solenoid valve
→ high-pressure reservoir completes concurrent heating.
In defrost mode, one cycle of each band of high-low pressure compressor, high pressure compressed cycle continues to indoor confession the present invention
Heat, low pressure compression cycle is absorbed heat out of high-pressure reservoir to defrost to outdoor heat exchanger heat release, takes full advantage of internal system
Heat, realize heating be carried out at the same time with defrosting.
It is liquid storage device temperature reduction caused by after defrosting in order to prevent that concurrent heating pattern, which is arranged, in the present invention, and when indoors, temperature reaches
High-temperature steam is bypassed to high pressure storage to concurrent heating solenoid valve when requiring and concurrent heating sensor detects that liquid storage device temperature reduces, is opened
It is mixed with liquid in liquid device.
Compared with the existing technology, the invention has the advantages that：
1, in defrost mode, low pressure compression recycles the heat that evaporation coil absorbs high-pressure reservoir to the present invention, fills
Divide the heat that internal system is utilized, reaches energy saving purpose.
2, concurrent heating of the invention is that high-temperature steam is directly bypassed to high-pressure reservoir to mix with liquid, reduces biography
Heat transfer temperature difference existing for system heat exchanger, improves heat exchange efficiency.
3, present invention operation is fairly simple, by electric control valve switching heating, defrosting and concurrent heating pattern, and may be implemented to make
Heat is run simultaneously with concurrent heating, and heating is carried out at the same time with defrosting.
4, the present invention only increases some pipelines and valve, and improvement cost is low, not only energy-efficient, but also to unit volume shadow
It rings little.
Description of the drawings
Fig. 1 is the whole knot for the air source heat pump defrosting system that a kind of two stages of compression of the present invention switches to part binary overlapping
Structure schematic diagram.
Fig. 2 is the air source heat pump defrosting system heating mode that a kind of two stages of compression of the present invention switches to part binary overlapping
Refrigerant flow direction schematic diagram when operation.
Fig. 3 is the air source heat pump defrosting system defrosting mode that a kind of two stages of compression of the present invention switches to part binary overlapping
Refrigerant flow direction schematic diagram when operation.
Fig. 4 is the air source heat pump defrosting system concurrent heating pattern that a kind of two stages of compression of the present invention switches to part binary overlapping
Refrigerant flow direction schematic diagram when operation.
In figure：
1, indoor heat exchanger；2, outdoor heat exchanger；3, gas-liquid separator；4, low pressure compressor；5, high pressure compressor；6, high
Press liquid storage device；7, economizer；8, four-way reversing valve；9, concurrent heating solenoid valve；10, the first check valve；11, the second check valve；12,
One electric expansion valve；13, the second electric expansion valve；14, third electric expansion valve；15, the 4th electric expansion valve；16, first section
Only valve；17, the second shut-off valve；18, third shut-off valve；19, the 4th shut-off valve；20, the 5th shut-off valve；21, the 6th shut-off valve；
22, concurrent heating sensor；23, steam flow mixing device；24, liquid cyclone；25, evaporation coil；26, the first defrosting branch；27, second
Defrost branch；28, concurrent heating branch.
Specific implementation mode
The specific implementation mode of the present invention is described in detail below with reference to shown in attached drawing.
Refering to Figure 1, a kind of two stages of compression of the present invention switches to the air source heat pump defrosting system of part binary overlapping
System, including indoor heat exchanger 1, outdoor heat exchanger 2, gas-liquid separator 3, high-pressure reservoir 6, economizer 7, four-way reversing valve 8, the
One defrosting branch 26, second defrosting branch 27 and concurrent heating branch 28.
One end of indoor heat exchanger 1 connects the first check valve 10, and the first check valve 10 is connected to the feed liquor of high-pressure reservoir 6
Mouthful, it is parallel with the first electric expansion valve 12 on the first check valve 10, the outlet of high-pressure reservoir 6 is connected to liquid cyclone 24
The ends m at the ends o, liquid cyclone 24 connect the 6th shut-off valve 21, and the 6th shut-off valve 21 is connected to the ends g of economizer 7, separating liquid
The ends n of device 24 connect the 4th electric expansion valve 15, and the 4th electric expansion valve 15 is connected to the ends f of economizer 7, the ends h of economizer 7
The second electric expansion valve 13 is connected, the second electric expansion valve 13 is connected to one end of outdoor heat exchanger 2, the second electric expansion valve 13
On be parallel with the second check valve 11 and the 5th shut-off valve 20；The other end of outdoor heat exchanger 2 is divided to two branches, a branch connection
Third shut-off valve 18, another article of branch connect the 4th shut-off valve 19, and third shut-off valve 18 is connected to the ends a of four-way reversing valve 8, and four
The ends d of logical reversal valve 8 are connected to the import of gas-liquid separator 3, and the outlet of gas-liquid separator 3 is connected to the suction of low pressure compressor 4
Gas port, the exhaust outlet of low pressure compressor 4 are divided to two branches, and a branch connects the first shut-off valve 16, another article of branch connection the
Two shut-off valves 17, the first shut-off valve 16 are connected to the ends j of steam flow mixing device 23, and the ends i and the ends k of steam flow mixing device are connected respectively to
The exhaust outlet at the air entry of high pressure compressor 5 and the ends e of economizer 7, high pressure compressor 5 is connected to the ends b of four-way reversing valve 8,
The ends c of four-way reversing valve 8 are connected to the other end of indoor heat exchanger 1.
The both ends of first defrosting branch are separately connected the entrance of outdoor heat exchanger and gas-liquid separator；First defrosting branch 26
Including the 4th shut-off valve 19, third electric expansion valve 14, evaporation coil 25 and connecting line, the 4th shut-off valve 19 connects third electricity
Sub- expansion valve 14, third electric expansion valve 14 are connected to the entrance of evaporation coil 25, and the outlet of evaporation coil 25 is connected to gas-liquid
The entrance of separator 3.
The both ends of second defrosting branch are separately connected low pressure compressor exhaust outlet and economizer cooling coil entrance；Second removes
White branch 27 includes shut-off valve 17 and both ends pipeline, and shut-off valve 17 is connected to the ends g of economizer 7.
Concurrent heating branch 28 includes concurrent heating solenoid valve 9, concurrent heating sensor 22 and connecting line, and one end of concurrent heating solenoid valve 9 connects
The ends c of four-way reversing valve 8 are connect, the other end of concurrent heating solenoid valve 9 is connected in the liquid of high-pressure reservoir 6, concurrent heating sensor 22
It is placed in the gas phase of high-pressure reservoir 6.Concurrent heating sensor 22 connects concurrent heating solenoid valve 9, for controlling opening for concurrent heating solenoid valve 9
Degree.
A kind of two stages of compression of the present invention switches to the operational mode packet of the air source heat pump defrosting system of part binary overlapping
It is as follows to include heating mode, defrosting mode and concurrent heating pattern, operation principle：
It please refers to shown in Fig. 2, a kind of two stages of compression of the present invention switches to the air source heat pump defrosting system of part binary overlapping
The heating mode of system includes main heating circulation loop and auxiliary heating branch, when heating mode is run, by the first shut-off valve 16, third
Shut-off valve 18, the 6th shut-off valve 21 are opened, and the second shut-off valve 17, the 4th shut-off valve 19, the 5th shut-off valve 20 are closed, the first electronics
Expansion valve 12,14 no power of third electric expansion valve, the second electric expansion valve 13, the 4th electric expansion valve 15 are powered, concurrent heating electricity
9 no power of magnet valve, the ends b of four-way reversing valve 8 are connected to the ends c, the ends a are connected to the ends d.
As shown in Fig. 2, a kind of air source heat pump defrosting system that two stages of compression switches to part binary overlapping of the present invention exists
Main heating circulation loop refrigerant flow direction under heating mode is：Low pressure compressor 4 (outlet presses through hot gaseous refrigerant in being)
(outlet is high pressure superheater gaseous refrigerant to → the first shut-off valve 16 → steam mixed flow mouth 23 (ends j are into i is brought out) → high pressure compressor 5
Agent) → 8 → indoor heat exchanger of four-way reversing valve 1 (outlet is high pressure saturated liquid refrigerant) → first 10 → high pressure of check valve storage
6 → liquid cyclone of liquid device 24 (ends o are into m is brought out) → the 6th 21 → economizer of shut-off valve, 7 (ends g are into h is brought out) → second electricity
Sub- expansion valve 13 (outlet is low pressure sub-cooled liquid refrigerant) → outdoor heat exchanger 2 (outlet is low-pressure gaseous refrigerant) → third
3 → low pressure compressor of shut-off valve 18 → four-way reversing valve, 8 → gas-liquid separator 4.
As shown in Fig. 2, a kind of air source heat pump defrosting system that two stages of compression switches to part binary overlapping of the present invention exists
Auxiliary heating branch refrigerant flow direction under heating mode is：Liquid cyclone 24 (ends n) → the 4th electric expansion valve 15 → economy
Device 7 (ends f are into e is brought out, and is exported and is saturated gaseous refrigerant for middle pressure) → steam mixer 23 (ends k), completes cycle.
As shown in figure 3, a kind of two stages of compression of the present invention switches to the air source heat pump defrosting system of part binary overlapping
Defrosting mode includes heating cycle and defrosting cycle, when defrosting mode is run, by the second shut-off valve 17, the 4th shut-off valve 19, the
Five shut-off valves 20 are opened, and the first shut-off valve 16, third shut-off valve 18, the 6th shut-off valve 21 are closed, the first electric expansion valve 12, the
Two electric expansion valves, 13 no power, third electric expansion valve 14, the 4th electric expansion valve 15 are powered, 9 no power of concurrent heating solenoid valve,
The ends four-way reversing valve b are connected to the ends c.
As shown in figure 3, a kind of air source heat pump defrosting system that two stages of compression switches to part binary overlapping of the present invention exists
Heating circularly cooling agent under defrosting mode, which flows to, is：High pressure compressor 5 (outlet is high pressure superheated gaseous refrigerant) → four-way
8 → indoor heat exchanger of reversal valve 1 (high pressure saturated liquid refrigerant) → first check valve 10 → high-pressure reservoir, 6 → separating liquid
(ends f are into e is brought out, outlet for 15 (middle pressure liquid refrigerant) → economizer 7 of device 24 (ends o are into n is brought out) → the 4th electric expansion valve
It is saturated gaseous refrigerant for middle pressure) → high pressure compressor 5, complete heating cycle.
As shown in figure 3, a kind of air source heat pump defrosting system that two stages of compression switches to part binary overlapping of the present invention exists
Defrosting circularly cooling agent under defrosting mode, which flows to, is：Low pressure compressor 4 (outlet presses through hot gaseous refrigerant in being) → second
17 → economizer of shut-off valve 7 (ends g are into h is brought out) → the 5th 20 → outdoor heat exchanger of shut-off valve 2 (middle pressure liquid refrigerant) → the
Four 14 → evaporation coils of shut-off valve 19 → third electric expansion valve, 25 (outlet：Low-pressure gaseous refrigerant) → gas-liquid separator 3 →
Low pressure compressor 4 completes defrosting cycle.
As shown in figure 4, a kind of two stages of compression of the present invention switches to the air source heat pump defrosting system of part binary overlapping
Concurrent heating pattern includes heating circulation loop and concurrent heating branch, when concurrent heating mode operation, by the first shut-off valve 16, third shut-off valve
18, the 6th shut-off valve 21 is opened, and the second shut-off valve 17, the 4th shut-off valve 19, the 5th shut-off valve 20 are closed, the first electric expansion valve
12,14 no power of third electric expansion valve, the second electric expansion valve 13, the 4th electric expansion valve 15 are powered, four-way reversing valve 8
The ends b are connected to the ends c, the ends a are connected to the ends d, and concurrent heating solenoid valve 9 is powered and (controls aperture by concurrent heating sensor 22).
As shown in figure 4, a kind of air source heat pump defrosting system that two stages of compression switches to part binary overlapping of the present invention exists
Heating circulation loop under concurrent heating pattern is identical as circulation loop in a heating mode.
As shown in figure 4, a kind of air source heat pump defrosting system that two stages of compression switches to part binary overlapping of the present invention exists
Concurrent heating branch refrigerant flow direction under concurrent heating pattern is：Four-way reversing valve 8 (ends c) → 9 → high-pressure reservoir of concurrent heating solenoid valve 6,
Complete concurrent heating.
Claims (8)
1. a kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping, which is characterized in that including interior
Heat exchanger (1), outdoor heat exchanger (2), gas-liquid separator (3), high-pressure reservoir (6), economizer (7) and four-way reversing valve (8),
First defrosting branch (26), the second defrosting branch (27) and concurrent heating branch (28)；One end of indoor heat exchanger (1) is single by first
The inlet of high-pressure reservoir (6) is connected to valve (10)；The liquid outlet of high-pressure reservoir (6) is connected to liquid cyclone (24)
The ends o, the ends m of liquid cyclone (24) are connected to the ends g of economizer (7), liquid cyclone by the 6th shut-off valve (21)
(24) the ends n are connected to the ends f of economizer (7) by the 4th electric expansion valve (15), and the ends h of economizer (7) pass through the second electricity
Sub- expansion valve (13) is connected to one end of outdoor heat exchanger (2)；The other end of outdoor heat exchanger (2) is divided to two branches, a branch
Road is connected to the ends a of four-way reversing valve (8) by third shut-off valve (18), and another branch connects the first defrosting branch (26)
One end；The ends d of four-way reversing valve (8) are connected to the import of gas-liquid separator (3), and the outlet of gas-liquid separator (3) is connected to low
Press the air entry of compressor (4), the exhaust outlet of low pressure compressor (4) that two branches, a branch is divided to pass through the first shut-off valve
(16) ends j of steam flow mixing device (23), one end of another the second defrosting branch (27) of branch connection, steam flow mixing device are connected to
(23) the ends i and the ends k is connected respectively to the ends e of the air entry and economizer (7) of high pressure compressor (5), high pressure compressor (5)
Exhaust outlet is connected to the ends b of four-way reversing valve (8), and the ends c of four-way reversing valve (8) are connected to the other end of indoor heat exchanger (1)；
Wherein, the first electric expansion valve (12) is parallel on the first check valve (10), the second electric expansion valve is parallel with second on (13)
Check valve (11) and the 5th shut-off valve (20)；
The other end of first defrosting branch (26) is connected to the entrances of gas-liquid separator (3), on the first defrosting branch (26) successively
4th shut-off valve (19), third electric expansion valve (14), evaporation coil (25) are installed, evaporation coil (25) is placed in high pressure liquid storage
In the liquid phase of device (6)；
The other end of second defrosting branch (27) is connected to the ends g of economizer (7), and the second defrosting branch road is equipped with the first cut-off
Valve (17).
2. a kind of two stages of compression according to claim 1 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, one end of concurrent heating branch (28) is connected to the ends c of four-way reversing valve (8), the other end is connected to high-pressure reservoir
(6) in liquid, concurrent heating solenoid valve (9) is installed on concurrent heating branch (28), is equipped in the gas phase of high-pressure reservoir (6) for controlling
The concurrent heating sensor (22) of concurrent heating solenoid valve (9) aperture processed.
3. a kind of two stages of compression according to claim 2 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, a kind of two stages of compression switches to the heating mode packet of the air source heat pump defrosting system of part binary overlapping
Include main heating circulation loop and auxiliary heating branch, when heating mode is run, the first shut-off valve (16), third shut-off valve (18), the
Six shut-off valves (21) are opened, and the second shut-off valve (17), the 4th shut-off valve (19), the 5th shut-off valve (20) are closed, and the first electronics is swollen
Swollen valve (12), third electric expansion valve (14) no power, the second electric expansion valve (13), the 4th electric expansion valve (15) are powered,
Concurrent heating solenoid valve (9) no power, the ends b of four-way reversing valve (8) are connected to the ends c, the ends a are connected to the ends d；
A kind of two stages of compression switches to the main system of the air source heat pump defrosting system of part binary overlapping in a heating mode
Soft circulation circuit refrigerant flow direction is：Low pressure compressor (4) exports the ends j of the → the first shut-off valve (16) → steam mixed flow mouth (23)
The ends bc of the ends i of → steam mixed flow mouth (23) → high pressure compressor (5) → four-way reversing valve (8) → indoor heat exchanger (1) → the
M end → sixth of the ends o of one check valve (10) → high-pressure reservoir (6) → liquid cyclone (24) into → liquid cyclone (24)
The ends g of shut-off valve (21) → economizer (7) are into the electric expansion valve (13) of ends h of → economizer (7) → second → outdoor heat exchanger
(2) → third shut-off valve (18) → four-way reversing valve (8) ends ad → gas-liquid separator (3) → low pressure compressor (4) entrance.
4. a kind of two stages of compression according to claim 3 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, a kind of two stages of compression switches to the air source heat pump defrosting system of part binary overlapping in a heating mode
Auxiliary heating branch refrigerant flow direction be：The electric expansion valve (15) of ends n of liquid cyclone (24) → the 4th → economizer (7)
Cycle is completed into the ends k of the ends e → steam mixer (23) of → economizer (7) in the ends f.
5. a kind of two stages of compression according to claim 3 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, a kind of two stages of compression switches to the defrosting mode packet of the air source heat pump defrosting system of part binary overlapping
Include heating cycle and defrosting cycle, when defrosting mode is run, the second shut-off valve (17), the 4th shut-off valve (19), the 5th shut-off valve
(20) it opens, the first shut-off valve (16), third shut-off valve (18), the 6th shut-off valve (21) are closed, the first electric expansion valve (12),
Second electric expansion valve (13) no power, third electric expansion valve (14), the 4th electric expansion valve (15) are powered, concurrent heating solenoid valve
(9) no power, the ends four-way reversing valve b are connected to the ends c；
Heating circularly cooling agent in defrost mode flows to：High pressure compressor (5) → four-way reversing valve (8) ends bc → interior
The ends o of heat exchanger (1) → first check valve (10) → high-pressure reservoir (6) → liquid cyclone (24) → liquid cyclone (24)
The ends n → the 4th electric expansion valve (15) → economizer (7) the ends f → economizer (7) the ends e → high pressure compressor (5), complete
Heating cycle.
6. a kind of two stages of compression according to claim 5 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, defrosting circularly cooling agent flow direction in defrost mode is：Low pressure compressor (4) → second shut-off valve (17) →
The shut-off valve (20) of ends h of the ends g of economizer (7) → economizer (7) → the 5th → outdoor heat exchanger (2) → the 4th shut-off valve (19)
→ third electric expansion valve (14) → evaporation coil (25) → gas-liquid separator (3) → low pressure compressor (4) is completed defrosting and is followed
Ring.
7. a kind of two stages of compression according to claim 3 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, a kind of two stages of compression switches to the concurrent heating pattern packet of the air source heat pump defrosting system of part binary overlapping
Include heating circulation loop and concurrent heating branch, when concurrent heating mode operation, the first shut-off valve (16), third shut-off valve (18), the 6th section
Only valve (21) is opened, and the second shut-off valve (17), the 4th shut-off valve (19), the 5th shut-off valve (20) are closed, the first electric expansion valve
(12), third electric expansion valve (14) no power, the second electric expansion valve (13), the 4th electric expansion valve (15) are powered, four-way
The ends b of reversal valve (8) are connected to the ends c, the ends a are connected to the ends d, and concurrent heating solenoid valve (9) is powered；
Heating circulation loop refrigerant flow direction under concurrent heating pattern is：Low pressure compressor (4) exports the → the first shut-off valve (16)
The bc of the ends i of the ends j of → steam mixed flow mouth (23) → steam mixed flow mouth (23) → high pressure compressor (5) → four-way reversing valve (8)
The ends o of end → indoor heat exchanger (1) → first check valve (10) → high-pressure reservoir (6) → liquid cyclone (24) are into → liquid
The ends h → second electronics of the ends g of the shut-off valve (21) of ends m of current divider (24) → the 6th → economizer (7) into → economizer (7) is swollen
Swollen valve (13) → outdoor heat exchanger (2) → third shut-off valve (18) → four-way reversing valve (8) ends ad → gas-liquid separator (3) → low
Press compressor (4) entrance.
8. a kind of two stages of compression according to claim 7 switches to the air source heat pump defrosting system of part binary overlapping,
It is characterized in that, the concurrent heating branch refrigerant flow direction under concurrent heating pattern is：Four-way reversing valve (8) ends c → concurrent heating solenoid valve (9)
→ high-pressure reservoir (6) completes concurrent heating.
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| CN106705478B (en) * | 2016-12-20 | 2022-04-19 | 珠海格力电器股份有限公司 | Hot gas bypass enhanced vapor injection air conditioning system |
| CN108036557B (en) * | 2017-12-28 | 2023-11-14 | 广东芬尼克兹节能设备有限公司 | Parallel cascade heat pump system |
| CN108759157B (en) * | 2018-07-20 | 2023-10-24 | 天津商业大学 | One-time throttling two-stage compression heat pump system |
| CN108679890A (en) * | 2018-07-23 | 2018-10-19 | 珠海格力电器股份有限公司 | Heat pump circulation system for composite defrosting and operation method |
| CN112297769B (en) * | 2020-11-05 | 2021-12-21 | 华南理工大学 | All-weather electric automobile heat pump air-conditioning system |
| CN112696840B (en) * | 2020-12-18 | 2022-04-08 | 无锡同方人工环境有限公司 | All-weather wide-range bidirectional flow regulating device and regulating process thereof |
| CN116255755B (en) * | 2023-02-22 | 2024-04-19 | 大连理工大学 | Double-stage compression PVT-air source heat pump system with alternate defrosting and uninterrupted heat supply functions |
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| JP4441965B2 (en) * | 1999-06-11 | 2010-03-31 | ダイキン工業株式会社 | Air conditioner |
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| CN102003854A (en) * | 2010-12-21 | 2011-04-06 | 哈尔滨工业大学 | Auxiliary compressor defrosting system for air source heat pump |
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Effective date of registration: 20200622 Address after: 225000 Sheyang Road 20, Hanjiang Economic Development Zone, Yangzhou, Jiangsu Patentee after: JIANGSU SIMPSON NEW ENERGY Co.,Ltd. Address before: Beilin District Xianning West Road 710049, Shaanxi city of Xi'an province No. 28 Patentee before: XI'AN JIAOTONG University |