CN105783317A - Continuous heating phase change energy storage cascade air source heat pump experiment system - Google Patents
Continuous heating phase change energy storage cascade air source heat pump experiment system Download PDFInfo
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- CN105783317A CN105783317A CN201610241707.0A CN201610241707A CN105783317A CN 105783317 A CN105783317 A CN 105783317A CN 201610241707 A CN201610241707 A CN 201610241707A CN 105783317 A CN105783317 A CN 105783317A
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
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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
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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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- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
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Abstract
The invention relates to a continuous heating phase change energy storage cascade air source heat pump experiment system which is composed of a low-temperature-level circulation system and a high-temperature-level circulation system and has a normal heating running mode, a heat storage running mode and a defrosting running mode. A cascade air source heat pump technology and a phase change energy storage technology are combined, a phase change heat accumulator serves as a low-position heat source for defrosting and indoor heating, and stability and reliability of defrosting running of a cascade air source heat pump are ensured; and meanwhile, heating is conducted indoors continuously, and therefore stability of the temperature of a room is ensured, and the indoor heat comfort level in the defrosting period is improved. Due to the fact that enough heat is provided by the phase change heat accumulator in the defrosting process, the defrosting speed can be increased; and due to the fact that the heat pump stores heat during efficient running, stored heat is used for defrosting and heating when defrosting is needed, space-time transfer of energy is achieved, and the overall running efficiency of a unit is improved.
Description
Technical field
The present invention relates to a kind of heating system, particularly to a kind of continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system.
Background technology
Net for air-source heat pump units is applied under northern area winter low temperature environment and be will appear from heating capacity and sharply decline, it may appear that the problems such as delivery temperature transfinites, compressor protection shutdown.Adopt overlapping air source heat pump can reach to improve the low temperature adaptability of air source heat pump, improve the purpose of its low-temperature heating performance.The same with regular air source heat pump, overlapping air source heat pump in heat supply running when off-premises station surface temperature is lower than air dew point and when being below the freezing point, it may appear that frost.Northern China has a lot of cities to have air themperature less than-10 DEG C winter, the low temperature and high relative humidity weather of relative humidity more than 75%, for instance the city such as Harbin, Changchun.Off-premises station frost can cause that air source heat pump heating capacity and systematic energy efficiency ratio reduce, and affects heat supply seriality and the reliability of air source heat pump system.In order to ensure the good running status continuously of unit, it is necessary to off-premises station is periodically defrosted.The feature of general overlapping air source heat pump utilization system self adopts the method for low-temperature level bypass defrosting, but in defrosting process, owing to indoor make indoor air temperature reduce without heat supply, affects indoor thermal comfort.In addition, experimental studies have found that, when outdoor temperature is lower than about-10 DEG C, hot gas bypass defrosting method defrosting time is very long, its reason is that the suction and discharge temperature that single-stage is run is all very low, and outdoor temperature is low, the heat that compressor is produced cannot meet the heat needed for the cold and heat exchanger frost layer defrost that heat exchanger absorbs from environment, more extends the indoor time without heat supply.
Summary of the invention
The present invention be directed in existing overlapping air source heat pump system defrosting process the indoor problem poor without heat supply, defrosting time length, indoor comfort, propose a kind of continuous heat supply phase-changing energy-storing overlapping air source heat pump system, it may be achieved the overlapping air source heat pump experimental system of normal defrosting and continuous heat supply.
The technical scheme is that a kind of continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system, be made up of low-temperature level blood circulation and high-temperature level blood circulation, there is normal heating operation mode, regenerative operation pattern and Defrost operation pattern,
Described low-temperature level blood circulation: the outfan of low-temperature level compressor is by after four-way change-over valve point of two-way, and the first electromagnetic valve of leading up to connects phase change heat accumulator, and the 5th electromagnetic valve of separately leading up to connects evaporative condenser and the 4th electromagnetic valve respectively；The outlet of the 4th electromagnetic valve is connected with the 9th electromagnetic valve after converging with the outlet of phase change heat accumulator；The outlet of evaporative condenser converges with the 9th electromagnetic valve after being connected with the 7th electromagnetic valve and is jointly connected with the first electric expansion valve, first electric expansion valve connects off-premises station, off-premises station connects the input of the first gas-liquid separator by four-way change-over valve, and the outfan of the first gas-liquid separator is connected with the input of low-temperature level compressor；Described high-temperature level blood circulation: the outfan of high-temperature level compressor is connected with one end of indoor set, the other end of indoor set divides two-way by the second electric expansion valve, the 8th electromagnetic valve of leading up to connects evaporative condenser, and the 3rd electromagnetic valve of separately leading up to connects phase change heat accumulator；The outfan of evaporative condenser connects the 6th electromagnetic valve, and the outfan of phase thermophore connects the second electromagnetic valve, and the pipeline of the second electromagnetic valve and the 6th electromagnetic valve connects high-temperature level compressor input through the second gas-liquid separator after converging.
When experimental system is in normal heating operation mode: the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 9th electromagnetic valve are closed；5th electromagnetic valve, the 6th electromagnetic valve, the 7th electromagnetic valve, the 8th electromagnetic valve are in open mode；The output of described low-temperature level compressor passes sequentially through four-way change-over valve, the 5th electromagnetic valve, evaporative condenser, the 7th electromagnetic valve, the first electric expansion valve, off-premises station, four-way change-over valve, the first gas-liquid separator return to the input of low-temperature level compressor and form low-temperature level circulation；The output of described high-temperature level compressor passes sequentially through indoor set, the second electric expansion valve, the 8th electromagnetic valve, evaporative condenser, the 6th electromagnetic valve, the second gas-liquid separator return to the input of high-temperature level compressor and form high-temperature level circulation.
Described regenerative operation pattern includes single regenerative operation pattern, series connection regenerative operation pattern, regenerative operation pattern in parallel；
When experimental system is in single regenerative operation pattern, described second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve, the 7th electromagnetic valve, the 8th electromagnetic valve are closed, described first electromagnetic valve, the 9th electromagnetic valve are in open mode, described low-temperature level compressor exports four-way change-over valve, the first electromagnetic valve, phase change heat accumulator, the 9th electromagnetic valve, the first electric expansion valve, off-premises station, four-way change-over valve, the first gas-liquid separator successively and returns to the input of low-temperature level compressor and form low-temperature level circulation, and high-temperature level circulation is closed；
When experimental system is in series connection regenerative operation pattern, described second electromagnetic valve, 3rd electromagnetic valve, 5th electromagnetic valve, 9th electromagnetic valve is closed, described first electromagnetic valve, 4th electromagnetic valve, 6th electromagnetic valve, 7th electromagnetic valve, 8th electromagnetic valve is in open mode, the output of described low-temperature level compressor sequentially passes through four-way change-over valve, first electromagnetic valve, phase change heat accumulator, 4th electromagnetic valve, evaporative condenser, 7th electromagnetic valve, first electric expansion valve, off-premises station, four-way change-over valve, first gas-liquid separator returns to the input of low-temperature level compressor and forms low-temperature level circulation；The output of described high-temperature level compressor sequentially passes through indoor set, the second electric expansion valve, the 8th electromagnetic valve, evaporative condenser, the 6th electromagnetic valve, the second gas-liquid separator return to the input of high-temperature level compressor and form high-temperature level circulation；
When experimental system is in regenerative operation pattern in parallel, described second electromagnetic valve, 3rd electromagnetic valve, 4th electromagnetic valve is closed, described first electromagnetic valve, 5th electromagnetic valve, 6th electromagnetic valve, 7th electromagnetic valve, 8th electromagnetic valve, 9th electromagnetic valve is in open mode, low-temperature level circulates: point two-way, one tunnel is that the output of low-temperature level compressor sequentially passes through four-way change-over valve, first electromagnetic valve, phase change heat accumulator, 9th electromagnetic valve, first electric expansion valve, off-premises station, four-way change-over valve, first gas-liquid separator returns to the input of low-temperature level compressor, another road is that the output of low-temperature level compressor sequentially passes through four-way change-over valve, 5th electromagnetic valve, evaporative condenser, 7th electromagnetic valve, first electric expansion valve, off-premises station, four-way change-over valve, first gas-liquid separator returns to the input of low-temperature level compressor；High-temperature level circulates: the output of described high-temperature level compressor sequentially passes through indoor set, the second electric expansion valve, the 8th electromagnetic valve, evaporative condenser, the 6th electromagnetic valve, the second gas-liquid separator return to the input of high-temperature level compressor.
When experimental system is in Defrost operation pattern, described 4th electromagnetic valve, the 5th electromagnetic valve, the 6th electromagnetic valve, the 7th electromagnetic valve, the 8th electromagnetic valve are closed, and described first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 9th electromagnetic valve are in open mode；The output of described low-temperature level compressor sequentially passes through four-way change-over valve, off-premises station, the first electric expansion valve, the 9th electromagnetic valve, phase change heat accumulator, the first electromagnetic valve, four-way change-over valve, the first gas-liquid separator return to the input of low-temperature level compressor and form low-temperature level circulation；The output of described high-temperature level compressor sequentially passes through indoor set, the second electric expansion valve, the 3rd electromagnetic valve, phase change heat accumulator, the second electromagnetic valve, the second gas-liquid separator return to the input of high-temperature level compressor and form high-temperature level circulation.
The beneficial effects of the present invention is: continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system of the present invention, overlapping air source heat pump technology is combined with phase-changing energy-storing technology, utilize phase change heat accumulator as defrosting and the low level heat energy to indoor heating, ensure stability and the reliability of the operation of overlapping air source heat pump defrosting, indoor uninterrupted heat supply simultaneously, thus ensureing that room temperature is stable, improve indoor thermal comfort during defrosting；Due to the fact that phase change heat accumulator provides enough heats in defrosting process, it is possible to improve defrosting speed；Owing to heat pump can realize different accumulation of heat patterns by the adjustment of some valves, single accumulation of heat is closed only low-temperature level circulation due to high-temperature level circulation and is opened institute so that heat storage efficiency greatly speeds up, the high temperature refrigerant of series connection accumulation of heat low-temperature level first passes through phase change heat accumulator then through evaporative condenser so accumulation of heat speed is fast, and the advantage of parallel connection accumulation of heat is that heat-accumulating process is little on the impact of indoor heating, so controlling each electromagnetic valve opening and closing according to different situations, select different accumulation of heat patterns.Be used for the heat stored when needing and defrosting defrosting, heat supply, it is achieved that the Time-spatial diversion of energy, improve the overall operation efficiency of unit.
Accompanying drawing explanation
Fig. 1 is continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system structural representation of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described with embodiment.
As it is shown in figure 1, the continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system of the present invention, it is made up of low-temperature level blood circulation and high-temperature level blood circulation.
Two blood circulation include low-temperature level compressor 1, high-temperature level compressor 2, four-way change-over valve 3, indoor set 4, off-premises station the 5, second electric expansion valve the 6, first electric expansion valve the 7, second gas-liquid separator the 8, first gas-liquid separator 9, evaporative condenser 10, phase change heat accumulator the 11, first electromagnetic valve F1, the second electromagnetic valve F2, the 3rd electromagnetic valve F3, the 4th electromagnetic valve F4, the 5th electromagnetic valve F5, the 6th electromagnetic valve F6, the 7th electromagnetic valve F7, the 8th electromagnetic valve F8, the 9th electromagnetic valve F9.
Low-temperature level blood circulation: the outfan of low-temperature level compressor 1 is connected with the first interface of four-way change-over valve 3, second interface of four-way change-over valve 3 divides two-way to be connected with phase change heat accumulator 11 and evaporative condenser 10 respectively, the first via enters phase change heat accumulator 11 by the first electromagnetic valve F1, and the 5th electromagnetic valve F5 of separately leading up to connects evaporative condenser 10 and the 7th electromagnetic valve F7 respectively；Between 5th electromagnetic valve F5 and evaporative condenser 10, connecting line separates a road and divides again two-way after the 4th electromagnetic valve F4, and a road is connected with phase change heat accumulator 11, and the 9th electromagnetic valve F9 and the seven electromagnetic valve F7 of separately leading up to is connected；Separate between the 9th electromagnetic valve F9 and the 7th electromagnetic valve F7 and lead up to the first electric expansion valve 7 and connect off-premises station 5 one end, the other end of off-premises station 5 is connected with the 3rd interface of four-way change-over valve 3,4th interface of four-way change-over valve 3 and the input of the first gas-liquid separator 9 are connected, and the outfan of the first gas-liquid separator 9 is connected with the input of low-temperature level compressor 1.
High-temperature level blood circulation: the outfan of high-temperature level compressor 2 is connected with one end of indoor set 4, the other end of indoor set 4 is connected with evaporative condenser 10 and phase change heat accumulator 11 respectively by 6 points of two-way of the second electric expansion valve, the first via connects evaporative condenser 10 by the 8th electromagnetic valve F8, and the 3rd electromagnetic valve F3 of separately leading up to connects phase change heat accumulator 11；The outfan of evaporative condenser 10 connects the 6th electromagnetic valve F6, and the outfan of phase change heat accumulator 11 is connected by the second electromagnetic valve F2 and the six electromagnetic valve F6；Separating a road between the second electromagnetic valve F2 and the 6th electromagnetic valve F6 to be connected with the second gas-liquid separator 8, the outfan of the second gas-liquid separator 8 is connected with the input of high-temperature level compressor 2.
Operation principle:
Single regenerative operation pattern: now high-temperature level circulation is closed, and low-temperature level circulates: low-temperature level compressor 1, four-way change-over valve the 3, first electromagnetic valve F1, phase change heat accumulator the 11, the 9th electromagnetic valve F9, the first electric expansion valve 7, off-premises station 5, four-way change-over valve the 3, first gas-liquid separator 9 return to low-temperature level compressor 1 and form circulation loop.Heat on off-premises station is delivered in phase change heat accumulator 11 by low-temperature level compressor 1, makes the phase-change material accumulation of heat in phase change heat accumulator 11.
Series connection regenerative operation pattern: low-temperature level circulates, low-temperature level compressor 1, four-way change-over valve the 3, first electromagnetic valve F1, phase change heat accumulator the 11, the 4th electromagnetic valve F4, evaporative condenser the 10, the 7th electromagnetic valve F7, the first electric expansion valve 7, off-premises station 5, four-way change-over valve the 3, first gas-liquid separator 9 return to low-temperature level compressor 1 and form circulation loop, heat on off-premises station 5 is delivered in phase change heat accumulator 11 and evaporative condenser 10 by low-temperature level compressor 1 respectively, makes the phase-change material accumulation of heat in phase change heat accumulator 11；High-temperature level circulates: sequentially pass through high-temperature level compressor 2, indoor set the 4, second electric expansion valve the 6, the 8th electromagnetic valve F8, evaporative condenser the 10, the 6th electromagnetic valve F6, the second gas-liquid separator 8 return to high-temperature level compressor 2 and form circulation loop, and the heat of evaporative condenser 10 is delivered in indoor set 4 by high-temperature level compressor 2.
Regenerative operation pattern in parallel: low-temperature level circulation point two-way, one tunnel is that low-temperature level compressor 1, four-way change-over valve the 3, first electromagnetic valve F1, phase change heat accumulator the 11, the 9th electromagnetic valve F9, the first electric expansion valve 7, off-premises station 5, four-way change-over valve the 3, first gas-liquid separator 9 return to low-temperature level compressor 1, form circulation loop, heat on off-premises station 5 is delivered in phase change heat accumulator 11, makes the phase-change material accumulation of heat in phase change heat accumulator 11.Another road is that low-temperature level compressor 1, four-way change-over valve the 3, the 5th electromagnetic valve F5, evaporative condenser the 10, the 7th electromagnetic valve F7, the first electric expansion valve 7, off-premises station 5, four-way change-over valve the 3, first gas-liquid separator 9 return to low-temperature level compressor 1, form circulation loop, the heat on off-premises station 5 is delivered in evaporative condenser 10；High-temperature level circulates: sequentially pass through high-temperature level compressor 2, indoor set the 4, second electric expansion valve the 6, the 8th electromagnetic valve F8, evaporative condenser the 10, the 6th electromagnetic valve F6, the second gas-liquid separator 8 return to high-temperature level compressor 2 and form circulation loop, and the heat of evaporative condenser 10 is delivered in indoor set 4 by high-temperature level compressor 2.
Defrost operation pattern: between low-temperature level compressor 1, four-way change-over valve 3, off-premises station the 5, first electric expansion valve the 7, the 9th electromagnetic valve F9, phase change heat accumulator the 11, first electromagnetic valve F1, four-way change-over valve the 3, first gas-liquid separator 9, low-temperature level compressor 1, series connection forms closed circuit, phase change heat accumulator 11 heat is delivered on off-premises station 5 and is used for defrosting, makes the phase-change material heat release in phase change heat accumulator 11 by low-temperature level compressor 1.The series connection of high-temperature level compressor 2, indoor set the 4, second electric expansion valve the 6, the 3rd electromagnetic valve F3, phase change heat accumulator the 11, second electromagnetic valve F2, the second gas-liquid separator 8, high-temperature level compressor 2 forms closed circuit, and the heat of phase change heat accumulator 11 is delivered in indoor set 4 by high-temperature level compressor 2.
The present invention is based on a kind of new system that overlapping air source heat pump technology and phase-changing energy-storing technology are organically combined by the thought of energy Time-spatial diversion.This system utilizes air source heat pump to extract heat from air and stored by heat in phase-changing energy-storing device, when needs defrost, the heat of storage is taken out defrosting and holds concurrently to room heat supply winter.System running pattern can be divided into normal heating operation mode, regenerative operation pattern and Defrost operation pattern.
One, normal heating operation mode
First electromagnetic valve F1, the second electromagnetic valve F2, the 3rd electromagnetic valve F3, the 4th electromagnetic valve F4, the 9th electromagnetic valve F9 are closed, the 5th electromagnetic valve F5, the 6th electromagnetic valve F6, the 7th electromagnetic valve F7, the 8th electromagnetic valve F8 are opened.The flow process of whole system is, circulates for low-temperature level: low-temperature level compressor 1 → four-way change-over valve the 3 → the 5th electromagnetic valve F5 → evaporative condenser the 10 → the 7th electromagnetic valve F7 → the first electric expansion valve 7 → off-premises station, 5 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1；High-temperature level is circulated: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve the 6 → the 8th electromagnetic valve F8 → evaporative condenser the 10 → the 6th electromagnetic valve F6 → the second gas-liquid separator 8 → high-temperature level compressor 2.
Two, regenerative operation pattern
Single regenerative operation pattern: the second electromagnetic valve F2, the 3rd electromagnetic valve F3, the 4th electromagnetic valve F4, the 5th electromagnetic valve F5, the 6th electromagnetic valve F6, the 7th electromagnetic valve F7, the 8th electromagnetic valve F8 are closed, the first electromagnetic valve F1, the 9th electromagnetic valve F9 are opened.Now high-temperature level circulation is closed, and circulates for low-temperature level: low-temperature level compressor 1 → four-way change-over valve 3 → the first electromagnetic valve F1 → phase change heat accumulator the 11 → the 9th electromagnetic valve F9 → the first electric expansion valve 7 → off-premises station, 5 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1.
Series connection regenerative operation pattern: the second electromagnetic valve F2, the 3rd electromagnetic valve F3, the 5th electromagnetic valve F5, the 9th electromagnetic valve F9 are closed, the first electromagnetic valve F1, the 4th electromagnetic valve F4, the 6th electromagnetic valve F6, the 7th electromagnetic valve F7, the 8th electromagnetic valve F8 are opened.Low-temperature level is circulated: low-temperature level compressor 1 → four-way change-over valve 3 → the first electromagnetic valve F1 → phase change heat accumulator the 11 → the 4th electromagnetic valve F4 → evaporative condenser the 10 → the 7th electromagnetic valve F7 → the first electric expansion valve 7 → off-premises station, 5 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1.High-temperature level is circulated: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve the 6 → the 8th electromagnetic valve F8 → evaporative condenser the 10 → the 6th electromagnetic valve F6 → the second gas-liquid separator 8 → high-temperature level compressor 2.
Regenerative operation pattern in parallel: the second electromagnetic valve F2, the 3rd electromagnetic valve F3, the 4th electromagnetic valve F4 are closed, the first electromagnetic valve F1, the 5th electromagnetic valve F5, the 6th electromagnetic valve F6, the 7th electromagnetic valve F7, the 8th electromagnetic valve F8, the 9th electromagnetic valve F9 are opened.For low-temperature level circulation point two-way, a road is: low-temperature level compressor 1 → four-way change-over valve 3 → the first electromagnetic valve F1 → phase change heat accumulator the 11 → the 9th electromagnetic valve F9 → the first electric expansion valve 7 → off-premises station, 5 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1.Another road is: low-temperature level compressor 1 → four-way change-over valve the 3 → the 5th electromagnetic valve F5 → evaporative condenser the 10 → the 7th electromagnetic valve F7 → the first electric expansion valve 7 → off-premises station, 5 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1.High-temperature level is circulated: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve the 6 → the 8th electromagnetic valve F8 → evaporative condenser the 10 → the 6th electromagnetic valve F6 → the second gas-liquid separator 8 → high-temperature level compressor 2.
Three, Defrost operation pattern
4th electromagnetic valve F4, the 5th electromagnetic valve F5, the 6th electromagnetic valve F6, the 7th electromagnetic valve F7, the 8th electromagnetic valve F8 are closed, the first electromagnetic valve F1, the second electromagnetic valve F2, the 3rd electromagnetic valve F3, the 9th electromagnetic valve F9 are opened.Whole system flow process is: circulate for low-temperature level: low-temperature level compressor 1 → four-way change-over valve, 3 → off-premises station 5 → the first electric expansion valve the 7 → the 9th electromagnetic valve F9 → phase change heat accumulator 11 → the first electromagnetic valve F1 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1.High-temperature level is circulated: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve the 6 → the 3rd electromagnetic valve F3 → phase change heat accumulator 11 → the second electromagnetic valve F2 → the second gas-liquid separator 8 → high-temperature level compressor 2.
Claims (4)
1. a continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system, is made up of low-temperature level blood circulation and high-temperature level blood circulation, has normal heating operation mode, regenerative operation pattern and Defrost operation pattern,
It is characterized in that: described low-temperature level blood circulation: the outfan of low-temperature level compressor (1) divides two-way afterwards by four-way change-over valve (3), the first electromagnetic valve (F1) of leading up to connects phase change heat accumulator (11), and the 5th electromagnetic valve (F5) of separately leading up to connects evaporative condenser (10) and the 4th electromagnetic valve (F4) respectively；The outlet of the 4th electromagnetic valve (F4) is connected with the 9th electromagnetic valve (F9) after converging with the outlet of phase change heat accumulator (11)；The outlet of evaporative condenser (10) converges with the 9th electromagnetic valve (F9) after being connected with the 7th electromagnetic valve (F7) and is jointly connected with the first electric expansion valve (7), first electric expansion valve (7) connects off-premises station (5), off-premises station (5) connects the input of the first gas-liquid separator (9) by four-way change-over valve (3), and the outfan of the first gas-liquid separator (9) is connected with the input of low-temperature level compressor (1)；Described high-temperature level blood circulation: the outfan of high-temperature level compressor (2) is connected with one end of indoor set (4), the other end of indoor set (4) is by the second electric expansion valve (6) point two-way, the 8th electromagnetic valve (F8) of leading up to connects evaporative condenser (10), and the 3rd electromagnetic valve (F3) of separately leading up to connects phase change heat accumulator (11)；The outfan of evaporative condenser (10) connects the 6th electromagnetic valve (F6), the outfan of phase thermophore (11) connects the second electromagnetic valve (F2), and the pipeline of the second electromagnetic valve (F2) and the 6th electromagnetic valve (F6) connects high-temperature level compressor (2) input through the second gas-liquid separator (8) after converging.
2. continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system according to claim 1, it is characterised in that: when experimental system is in normal heating operation mode: the first electromagnetic valve (F1), the second electromagnetic valve (F2), the 3rd electromagnetic valve (F3), the 4th electromagnetic valve (F4), the 9th electromagnetic valve (F9) are closed；5th electromagnetic valve (F5), the 6th electromagnetic valve (F6), the 7th electromagnetic valve (F7), the 8th electromagnetic valve (F8) are in open mode；The output of described low-temperature level compressor (1) passes sequentially through four-way change-over valve (3), the 5th electromagnetic valve (F5), evaporative condenser (10), the 7th electromagnetic valve (F7), the first electric expansion valve (7), off-premises station (5), four-way change-over valve (3), the first gas-liquid separator (9) return to low-temperature level compressor (1) input and form low-temperature level circulation；The output of described high-temperature level compressor (2) passes sequentially through indoor set (4), the second electric expansion valve (6), the 8th electromagnetic valve (F8), evaporative condenser (10), the 6th electromagnetic valve (F6), the second gas-liquid separator (8) return to high-temperature level compressor (2) input and form high-temperature level circulation.
3. continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system according to claim 1, it is characterised in that: described regenerative operation pattern includes single regenerative operation pattern, series connection regenerative operation pattern, regenerative operation pattern in parallel；
When experimental system is in single regenerative operation pattern, described second electromagnetic valve (F2), 3rd electromagnetic valve (F3), 4th electromagnetic valve (F4), 5th electromagnetic valve (F5), 6th electromagnetic valve (F6), 7th electromagnetic valve (F7), 8th electromagnetic valve (F8) is closed, described first electromagnetic valve (F1), 9th electromagnetic valve (F9) is in open mode, described low-temperature level compressor (1) exports four-way change-over valve (3) successively, first electromagnetic valve (F1), phase change heat accumulator (11), 9th electromagnetic valve (F9), first electric expansion valve (7), off-premises station (5), four-way change-over valve (3), first gas-liquid separator (9) returns to low-temperature level compressor (1) input and forms low-temperature level circulation, and high-temperature level circulation is closed；
When experimental system is in series connection regenerative operation pattern, described second electromagnetic valve (F2), 3rd electromagnetic valve (F3), 5th electromagnetic valve (F5), 9th electromagnetic valve (F9) is closed, described first electromagnetic valve (F1), 4th electromagnetic valve (F4), 6th electromagnetic valve (F6), 7th electromagnetic valve (F7), 8th electromagnetic valve (F8) is in open mode, the output of described low-temperature level compressor (1) sequentially passes through four-way change-over valve (3), first electromagnetic valve (F1), phase change heat accumulator (11), 4th electromagnetic valve (F4), evaporative condenser (10), 7th electromagnetic valve (F7), first electric expansion valve (7), off-premises station (5), four-way change-over valve (3), first gas-liquid separator (9) returns to low-temperature level compressor (1) input and forms low-temperature level circulation；The output of described high-temperature level compressor (2) sequentially passes through indoor set (4), the second electric expansion valve (6), the 8th electromagnetic valve (F8), evaporative condenser (10), the 6th electromagnetic valve (F6), the second gas-liquid separator (8) return to high-temperature level compressor (2) input and form high-temperature level circulation；
nullWhen experimental system is in regenerative operation pattern in parallel，Described second electromagnetic valve (F2)、3rd electromagnetic valve (F3)、4th electromagnetic valve (F4) is closed，Described first electromagnetic valve (F1)、5th electromagnetic valve (F5)、6th electromagnetic valve (F6)、7th electromagnetic valve (F7)、8th electromagnetic valve (F8)、9th electromagnetic valve (F9) is in open mode，Low-temperature level circulates: point two-way，One tunnel is that low-temperature level compressor (1) output sequentially passes through four-way change-over valve (3)、First electromagnetic valve (F1)、Phase change heat accumulator (11)、9th electromagnetic valve (F9)、First electric expansion valve (7)、Off-premises station (5)、Four-way change-over valve (3)、First gas-liquid separator (9) returns to low-temperature level compressor (1) input，Another road is that low-temperature level compressor (1) output sequentially passes through four-way change-over valve (3)、5th electromagnetic valve (F5)、Evaporative condenser (10)、7th electromagnetic valve (F7)、First electric expansion valve (7)、Off-premises station (5)、Four-way change-over valve (3)、First gas-liquid separator (9) returns to low-temperature level compressor (1) input；High-temperature level circulates: the output of described high-temperature level compressor (2) sequentially passes through indoor set (4), the second electric expansion valve (6), the 8th electromagnetic valve (F8), evaporative condenser (10), the 6th electromagnetic valve (F6), the second gas-liquid separator (8) return to high-temperature level compressor (2) input.
4. continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system according to claim 1, it is characterized in that: when experimental system is in Defrost operation pattern, described 4th electromagnetic valve (F4), the 5th electromagnetic valve (F5), the 6th electromagnetic valve (F6), the 7th electromagnetic valve (F7), the 8th electromagnetic valve (F8) are closed, and described first electromagnetic valve (F1), the second electromagnetic valve (F2), the 3rd electromagnetic valve (F3), the 9th electromagnetic valve (F9) are in open mode；The output of described low-temperature level compressor (1) sequentially passes through four-way change-over valve (3), off-premises station (5), the first electric expansion valve (7), the 9th electromagnetic valve (F9), phase change heat accumulator (11), the first electromagnetic valve (F1), four-way change-over valve (3), the first gas-liquid separator (9) return to low-temperature level compressor (1) input and form low-temperature level circulation；The output of described high-temperature level compressor (2) sequentially passes through indoor set (4), the second electric expansion valve (6), the 3rd electromagnetic valve (F3), phase change heat accumulator (11), the second electromagnetic valve (F2), the second gas-liquid separator (8) return to high-temperature level compressor (2) input and form high-temperature level circulation.
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