CN104101126B - Continuous heat-supplying phase change energy storage overlapped type air source heat pump system and operation method thereof - Google Patents
Continuous heat-supplying phase change energy storage overlapped type air source heat pump system and operation method thereof Download PDFInfo
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- CN104101126B CN104101126B CN201410358222.0A CN201410358222A CN104101126B CN 104101126 B CN104101126 B CN 104101126B CN 201410358222 A CN201410358222 A CN 201410358222A CN 104101126 B CN104101126 B CN 104101126B
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Abstract
The invention relates to a continuous heat-supplying phase change energy storage overlapped type air source heat pump system and an operation method thereof; the overlapped air source heat pump technology is combined with the phase change energy storage technology, a phase change heat accumulator is used as a low-grade heat source for defrosting and supplying heat to a room, so that stability and reliability of defrosting operation of the overlapped type air source heat pump are ensured, meanwhile heat can be continuously supplied to the room, and thereby stable temperature of the room is ensured, and indoor thermal comfort during a defrosting period is improved; according to the continuous heat-supplying phase change energy storage overlapped type air source heat pump system, since the phase change heat accumulator provides enough heat in the defrosting process, defrosting speed can be improved; the heat pump accumulates heat when in efficient operation, so that accumulated heat can be used for defrosting and heating when needing to defrost, and thereby space-time transfer of energy is achieved, and overall operation efficiency of the 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 system
System and operation method.
Background technology
Net for air-source heat pump units apply under northern area winter low temperature environment will appear from heating capacity drastically decline it may appear that
Delivery temperature transfinites, the problems such as compressor protection is shut down.Can be reached using overlapping air source heat pump and improve air source heat pump
Low temperature adaptability, improve the purpose of its low-temperature heating performance.As the heat pump of regular air source, overlapping air source heat pump exists
In heat supply running when off-premises station surface temperature is less than air dew point and when being below the freezing point it may appear that frost.Northern China has
There are below -10 DEG C of air themperature, the low temperature and high relative humidity weather of relative humidity more than 75%, such as Harbin, length in a lot of city winters
The cities such as spring.Off-premises station frost can lead to air source heat pump heating capacity and systematic energy efficiency ratio to reduce, and affects air source heat pump
The heat supply continuity of system and reliability.In order to ensure the well continuous running status of unit, need to enter line period to off-premises station
The defrosting of property.The method that the general overlapping air source heat pump utilization system feature of itself adopts low-temperature level bypass defrosting, but
During defrosting, so that indoor air temperature is reduced, affect indoor thermal comfort.Additionally, experimental study
Find, when outdoor temperature is less than -10 DEG C about, hot gas bypass defrosting method defrosting time is very long, its reason is the suction that single-stage is run
Delivery temperature is all very low, and outdoor temperature is low, the heat that compressor is produced cannot meet the cold that heat exchanger absorbs from environment and
Heat needed for heat exchanger frost layer defrost, more extends the time of indoor no heat supply.
Content of the invention
The present invention be directed to during the defrosting of existing overlapping air source heat pump system interior no heat supply, defrosting time length,
The problem of indoor comfort difference it is proposed that a kind of continuous heat supply phase-changing energy-storing overlapping air source heat pump system and operation method,
Can achieve the overlapping air source heat pump 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 system, system includes
Low-temperature level compressor, high-temperature level compressor, four-way change-over valve, indoor set, off-premises station, the second electric expansion valve, the first electronics are swollen
Swollen valve, the second gas-liquid separator, the first gas-liquid separator, evaporative condenser, phase change heat accumulator, several magnetic valve, system includes
Low-temperature level circulation and high-temperature level circulate two parts；
Low-temperature level circulates: the output end of low-temperature level compressor is connected with the first interface of four-way change-over valve, and four-way commutates
The second interface of valve divides two-way, and the first via enters phase change heat accumulator by the first magnetic valve, another road pass sequentially through the 5th magnetic valve,
3rd magnetic valve connects the other end of phase change heat accumulator；Between 5th magnetic valve and the 3rd magnetic valve, connecting line divides two-way to connect steaming
Feel cold condenser, leads up to the 7th magnetic valve and enters evaporative condenser, another road passes sequentially through the 11st magnetic valve, the 9th electromagnetism
Valve enters evaporative condenser；Between 11st magnetic valve and the 9th magnetic valve, connecting line connects outdoor by the first electric expansion valve
Machine one end, the other end of off-premises station is connected with the 3rd interface of four-way change-over valve, the 4th interface of four-way change-over valve and first
The input of gas-liquid separator is connected, and the output end of the first gas-liquid separator is connected with the input of low-temperature level compressor；
High-temperature level circulates: the output end of high-temperature level compressor is connected with one end of indoor set, and the other end of indoor set leads to
Crossing the second electric expansion valve divides two-way to connect evaporative condenser, leads up to the tenth magnetic valve and connects evaporative condenser, another road is successively
Evaporative condenser is connect by the 12nd magnetic valve, the 8th magnetic valve；Connecting line between 12nd magnetic valve and the 8th magnetic valve
Point two-way connects phase change heat accumulator, leads up to the 4th magnetic valve and connects phase change heat accumulator, another road pass sequentially through the 6th magnetic valve, the
Two magnetic valves connect phase change heat accumulator；Between 6th magnetic valve and the second magnetic valve, connecting line connects the input of the second gas-liquid separator
End, the output end of the second gas-liquid separator is connected with the input of high-temperature level compressor.
A kind of operation method of continuous heat supply phase-changing energy-storing overlapping air source heat pump system, described system is divided into normal system
Heat pattern, accumulation of heat pattern and defrosting mode,
Normal heating mode: by the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the 11st electromagnetism
Valve, the 12nd closed electromagnetic valve, by the 5th magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve, the 9th magnetic valve,
Tenth magnetic valve is opened, and low-temperature level circulates: is followed successively by low-temperature level compressor, four-way change-over valve, the 5th magnetic valve, the 7th electromagnetism
Valve, evaporative condenser, the 9th magnetic valve, the first electric expansion valve, off-premises station, four-way change-over valve, the first gas-liquid separator return to
Low-temperature level compressor；High-temperature level circulate: be followed successively by high-temperature level compressor, indoor set, the second electric expansion valve, the tenth magnetic valve,
Evaporative condenser, the 8th magnetic valve, the 6th magnetic valve, the second gas-liquid separator return to high-temperature level compressor；
Accumulation of heat pattern: by the second magnetic valve, the 4th magnetic valve, the 5th magnetic valve, the 11st magnetic valve, the 12nd magnetic valve
Close, by the first magnetic valve, the 3rd magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve, the 9th magnetic valve, the tenth
Magnetic valve is opened, and low-temperature level circulates: be followed successively by low-temperature level compressor, four-way change-over valve, the first magnetic valve, phase change heat accumulator, the
Three magnetic valves, the 7th magnetic valve, evaporative condenser, the 9th magnetic valve, the first electric expansion valve, off-premises station, four-way change-over valve,
One gas-liquid separator returns to low-temperature level compressor；High-temperature level circulates: is followed successively by high-temperature level compressor, indoor set, the second electronics swollen
Swollen valve, the tenth magnetic valve, evaporative condenser, the 8th magnetic valve, the 6th magnetic valve, the second gas-liquid separator return to high-temperature level compression
Machine；
Defrosting mode: by the 5th magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve, the 9th magnetic valve,
Ten closed electromagnetic valves, by the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the 11st magnetic valve, the tenth
Two magnetic valves are opened, low-temperature level circulate: be followed successively by low-temperature level compressor, four-way change-over valve, off-premises station, the first electric expansion valve,
11st magnetic valve, the 3rd magnetic valve, phase change heat accumulator, the first magnetic valve, four-way change-over valve, the first gas-liquid separator return to low
Warm level compressor；High-temperature level circulates: high-temperature level compressor, indoor set, the second electric expansion valve, the 12nd magnetic valve, the 4th electricity
Magnet valve, phase change heat accumulator, the second magnetic valve, the second gas-liquid separator return to high-temperature level compressor.
The beneficial effects of the present invention is: continuous heat supply phase-changing energy-storing overlapping air source heat pump system of the present invention and operation
Method, overlapping air source heat pump technology is combined with phase-changing energy-storing technology, by the use of phase change heat accumulator as defrosting with to interior
It is ensured that the stability of overlapping air source heat pump defrosting operation and reliability, interior is uninterrupted simultaneously supplies the low level heat energy of heat supply
Heat, thus ensureing that room temperature is stable, improves indoor thermal comfort during defrosting；The present invention was being defrosted due to phase change heat accumulator
Provide enough heats in journey, defrosting speed can be improved；Due to heat pump accumulation of heat in Effec-tive Function, will when needing defrosting
The heat storing be used for defrost, heat supply it is achieved that the Time-spatial diversion of energy, improve the overall operation efficiency of unit.
Brief description
Fig. 1 is continuous heat supply phase-changing energy-storing overlapping air source heat pump system structural representation of the present invention.
Specific embodiment
Continuous heat supply phase-changing energy-storing overlapping air source heat pump system structural representation as shown in Figure 1, system includes low temperature
Level compressor 1, high-temperature level compressor 2, four-way change-over valve 3, indoor set 4, off-premises station 5, the second electric expansion valve 6, the first electronics
Expansion valve 7, the second gas-liquid separator 8, the first gas-liquid separator 9, evaporative condenser 10, phase change heat accumulator 11, magnetic valve f1, electricity
Magnet valve f2, magnetic valve f3, magnetic valve f4, magnetic valve f5, magnetic valve f6, magnetic valve f7, magnetic valve f8, magnetic valve f9, magnetic valve
F10, magnetic valve f11, magnetic valve f12.Described system includes low-temperature level circulation and high-temperature level circulates two parts.
For low-temperature level: the output end of low-temperature level compressor 1 is connected with the first interface of four-way change-over valve 3, and four-way changes
Divide two-way to the second interface of valve 3, the first via enters phase change heat accumulator 11 by magnetic valve f1, another road passes sequentially through magnetic valve
F5, magnetic valve f3 connect the other end of phase change heat accumulator 11.Between magnetic valve f5 and magnetic valve f3, connecting line divides two-way to connect steaming
Feel cold condenser 10, leads up to magnetic valve f7 and enters evaporative condenser 10, another road passes sequentially through magnetic valve f11, magnetic valve f9
Enter evaporative condenser 10.Between magnetic valve f11 and magnetic valve f9, connecting line connects off-premises station 5 by the first electric expansion valve 7
One end, the other end of off-premises station 5 is connected with the 3rd interface of four-way change-over valve 3, the 4th interface of four-way change-over valve 3 and first
The input of gas-liquid separator 9 is connected, and the output end of the first gas-liquid separator 9 is connected with the input of low-temperature level compressor 1
Connect.
For high-temperature level: the output end of high-temperature level compressor 2 is connected with one end of indoor set 4, the other end of indoor set 4
Connect evaporative condenser 10 by 6 points of two-way of the second electric expansion valve, lead up to magnetic valve f10 and connect evaporative condenser 10, another
Road passes sequentially through magnetic valve f12, magnetic valve f8 connects evaporative condenser 10.Between magnetic valve f12 and magnetic valve f8, connecting line divides
Two-way connects phase change heat accumulator 11, leads up to magnetic valve f4 and connects phase change heat accumulator 11, another road passes sequentially through magnetic valve f6, electromagnetism
Valve f2 connects phase change heat accumulator 11.Between magnetic valve f6 and magnetic valve f2, connecting line connects the input of the second gas-liquid separator 8, the
The output end of two gas-liquid separators 8 is connected with the input of high-temperature level compressor 2.
Operation principle:
During accumulation of heat working condition, low-temperature level compressor 1, four-way change-over valve 3, phase change heat accumulator 11, evaporative condenser 10,
Between one 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 formation follows
Loop back path, the heat on off-premises station is delivered in phase change heat accumulator 11 and evaporative condenser 10 low-temperature level compressor 1 respectively, makes
Phase-change material accumulation of heat in phase change heat accumulator 11.High-temperature level compressor 2, indoor set 4 and the second electric expansion valve 6, evaporative condenser
Device 10, the second gas-liquid separator 8, high-temperature level compressor 2 are connected, and high-temperature level compressor 2 is by the heat transfer of evaporative condenser 10
To in indoor set 4.
During defrosting working condition, low-temperature level compressor 1, four-way change-over valve 3, off-premises station 5, the first electric expansion valve 7, phase transformation
Storage heater 11, series connection between four-way change-over valve 3, the first gas-liquid separator 9, low-temperature level compressor 1 forms closed circuit, low-temperature level
Compressor 1 will be used for defrosting in phase change heat accumulator 11 heat transfer to off-premises station 5, so that the phase-change material in phase change heat accumulator 11 is released
Heat.High-temperature level compressor 2, indoor set 4 and the second electric expansion valve 6, phase change heat accumulator 11, the second gas-liquid separator 8, high temperature
Level compressor 2 is connected, and high-temperature level compressor 2 is by the heat transfer of phase change heat accumulator 11 in indoor set 4.
The present invention is that overlapping air source heat pump technology is had by the thought based on energy Time-spatial diversion with phase-changing energy-storing technology
A kind of new system that machine combines.This system winter is extracted heat and stores heat from the air using air source heat pump and stores in phase transformation
In energy device, when needing defrosting, by simultaneous for the heat taking-up defrosting of storage to room heat supply.System running pattern can be divided into normal system
Heat pattern, accumulation of heat pattern and defrosting mode.
First, normal heating mode
Magnetic valve f1, magnetic valve f2, magnetic valve f3, magnetic valve f4, magnetic valve f11, magnetic valve f12 are closed, by electromagnetism
Valve f5, magnetic valve f6, magnetic valve f7, magnetic valve f8, magnetic valve f9, magnetic valve f10 open.The flow process of whole system is, for
Low-temperature level circulates: low-temperature level compressor 1 → four-way change-over valve, 3 → magnetic valve f5 → magnetic valve f7 → evaporative condenser 10 → electromagnetism
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；
For high-temperature level circulation: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve 6 → magnetic valve f10 → evaporative condenser
10 → magnetic valve f8 → magnetic valve f6 → the second gas-liquid separator 8 → high-temperature level compressor 2.
2nd, accumulation of heat pattern
Magnetic valve f2, magnetic valve f4, magnetic valve f5, magnetic valve f11, magnetic valve f12 are closed, by magnetic valve f1, electromagnetism
Valve f3, magnetic valve f6, magnetic valve f7, magnetic valve f8, magnetic valve f9, magnetic valve f10 open.The flow process of whole system is, for
Low-temperature level circulates: low-temperature level compressor 1 → four-way change-over valve, 3 → magnetic valve f1 → phase change heat accumulator 11 → magnetic valve f3 → electromagnetism
Valve f7 → evaporative condenser 10 → magnetic 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；For high-temperature level circulation: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve 6
→ magnetic valve f10 → evaporative condenser 10 → magnetic valve f8 → magnetic valve f6 → the second gas-liquid separator 8 → high-temperature level compressor
2.
3rd, defrosting mode
Magnetic valve f5, magnetic valve f6, magnetic valve f7, magnetic valve f8, magnetic valve f9, magnetic valve f10 are closed, by magnetic valve
F1, magnetic valve f2, magnetic valve f3, magnetic valve f4, magnetic valve f11, magnetic valve f12 open.The flow process of whole system is, for low
Warm level circulation: low-temperature level compressor 1 → four-way change-over valve, 3 → off-premises station 5 → the first electric expansion valve 7 → magnetic valve f11 → electricity
Magnet valve f3 → phase change heat accumulator 11 → magnetic valve f1 → four-way change-over valve 3 → the first gas-liquid separator 9 → low-temperature level compressor 1；
For high-temperature level circulation: high-temperature level compressor 2 → indoor set 4 → the second electric expansion valve 6 → magnetic valve f12 → magnetic valve f4 →
Phase change heat accumulator 11 → magnetic valve f2 → the second gas-liquid separator 8 → high-temperature level compressor 2.
Claims (2)
1. a kind of continuous heat supply phase-changing energy-storing overlapping air source heat pump system is it is characterised in that system includes low-temperature level compression
Machine (1), high-temperature level compressor (2), four-way change-over valve (3), indoor set (4), off-premises station (5), the second electric expansion valve (6),
One electric expansion valve (7), the second gas-liquid separator (8), the first gas-liquid separator (9), evaporative condenser (10), phase change heat accumulator
(11), several magnetic valves, realize normal defrosting and continuous heat supply, and system includes low-temperature level circulation and high-temperature level circulates two parts；
Low-temperature level circulates: the output end of low-temperature level compressor (1) is connected with the first interface of four-way change-over valve (3), and four-way changes
Second interface to valve (3) divides two-way, and the first via enters phase change heat accumulator (11) by the first magnetic valve (f1), and another road leads to successively
Cross the 5th magnetic valve (f5), the 3rd magnetic valve (f3) connects the other end of phase change heat accumulator (11)；5th magnetic valve (f5) and
Between three magnetic valves (f3), connecting line divides two-way to connect evaporative condenser (10), leads up to the 7th magnetic valve (f7) and enters evaporation
Condenser (10), another road passes sequentially through the 11st magnetic valve (f11), the 9th magnetic valve (f9) enters evaporative condenser (10)；
Between 11st magnetic valve (f11) and the 9th magnetic valve (f9), connecting line connects off-premises station (5) by the first electric expansion valve (7)
One end, the other end of off-premises station (5) is connected with the 3rd interface of four-way change-over valve (3), the 4th interface of four-way change-over valve (3)
It is connected with the input of the first gas-liquid separator (9), the output end of the first gas-liquid separator (9) and low-temperature level compressor (1)
Input be connected；
Heat on off-premises station is delivered to phase change heat accumulator (11) and evaporative condenser (10) by low-temperature level compressor (1) respectively
In, make the phase-change material accumulation of heat in phase change heat accumulator (11), phase change heat accumulator (11) heat is passed by low-temperature level compressor (1)
It is delivered to and is used for defrosting on off-premises station (5), make the phase-change material heat release in phase change heat accumulator (11)；
High-temperature level circulate: the output end of high-temperature level compressor (2) is connected with one end of indoor set (4), indoor set (4) another
End connects evaporative condenser (10) by the second electric expansion valve (6) point two-way, lead up to the tenth magnetic valve (f10) connect evaporate cold
Condenser (10), another road passes sequentially through the 12nd magnetic valve (f12), the 8th magnetic valve (f8) connects evaporative condenser (10)；Tenth
Between two magnetic valves (f12) and the 8th magnetic valve (f8), connecting line divides two-way to connect phase change heat accumulator (11), leads up to the 4th
Magnetic valve (f4) connects phase change heat accumulator (11), and another road passes sequentially through the 6th magnetic valve (f6), the second magnetic valve (f2) connects phase transformation
Storage heater (11)；Between 6th magnetic valve (f6) and the second magnetic valve (f2), connecting line connects the defeated of the second gas-liquid separator (8)
Enter end, the output end of the second gas-liquid separator (8) is connected with the input of high-temperature level compressor (2)；
High-temperature level compressor (2) is by the heat transfer of evaporative condenser (10) or phase change heat accumulator (11) in indoor set (4).
2. according to claim 1 the operation method of system it is characterised in that described system is divided into normal heating mode, storage
Heat pattern and defrosting mode,
Normal heating mode: by the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the 11st magnetic valve,
12nd closed electromagnetic valve, by the 5th magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve, the 9th magnetic valve,
Ten magnetic valves are opened, and low-temperature level circulates: be followed successively by low-temperature level compressor (1), four-way change-over valve (3), the 5th magnetic valve (f5), the
Seven magnetic valves (f7), evaporative condenser (10), the 9th magnetic valve (f9), the first electric expansion valve (7), off-premises station (5), four-way change
Return to low-temperature level compressor (1) to valve (3), the first gas-liquid separator (9)；High-temperature level circulates: is followed successively by high-temperature level compressor
(2), indoor set (4), the second electric expansion valve (6), the tenth magnetic valve (f10), evaporative condenser (10), the 8th magnetic valve
(f8), the 6th magnetic valve (f6), the second gas-liquid separator (8) return to high-temperature level compressor (2)；
Accumulation of heat pattern: the second magnetic valve, the 4th magnetic valve, the 5th magnetic valve, the 11st magnetic valve, the 12nd magnetic valve are closed
Close, by the first magnetic valve, the 3rd magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve, the 9th magnetic valve, the tenth electricity
Magnet valve is opened, and low-temperature level circulates: is followed successively by low-temperature level compressor (1), four-way change-over valve (3), the first magnetic valve (f1), phase transformation storage
Hot device (11), the 3rd magnetic valve (f3), the 7th magnetic valve (f7), evaporative condenser (10), the 9th magnetic valve (f9), the first electronics
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)；High-temperature level
Circulation: be followed successively by high-temperature level compressor (2), indoor set (4), the second electric expansion valve (6), the tenth magnetic valve (f10), evaporation cold
Condenser (10), the 8th magnetic valve (f8), the 6th magnetic valve (f6), the second gas-liquid separator (8) return to high-temperature level compressor (2)；
Heat on off-premises station is delivered in phase change heat accumulator (11) and evaporative condenser (10) low-temperature level compressor (1) respectively, makes
Phase-change material accumulation of heat in phase change heat accumulator (11)；High-temperature level compressor (2) is by the heat transfer of evaporative condenser (10) to room
In interior machine (4)；
Defrosting mode: by the 5th magnetic valve, the 6th magnetic valve, the 7th magnetic valve, the 8th magnetic valve, the 9th magnetic valve, the tenth electricity
Magnet valve is closed, by the first magnetic valve, the second magnetic valve, the 3rd magnetic valve, the 4th magnetic valve, the 11st magnetic valve, the 12nd electricity
Magnet valve is opened, and low-temperature level circulates: is followed successively by low-temperature level compressor (1), four-way change-over valve (3), off-premises station (5), the first electronics swollen
Swollen valve (7), the 11st magnetic valve, the 3rd magnetic valve, phase change heat accumulator (11), the first magnetic valve, four-way change-over valve (3), first
Gas-liquid separator (9) returns to low-temperature level compressor (1)；High-temperature level circulates: high-temperature level compressor (2), indoor set (4), the second electricity
Sub- expansion valve (6), the 12nd magnetic valve (f12), the 4th magnetic valve (f4), phase change heat accumulator (11), the second magnetic valve (f2),
Two gas-liquid separators (8) return to high-temperature level compressor (2)；Phase change heat accumulator (11) heat transfer is arrived by low-temperature level compressor (1)
Off-premises station is used for defrosting on (5), makes the phase-change material heat release in phase change heat accumulator (11)；Phase transformation is stored by high-temperature level compressor (2)
The heat transfer of hot device (11) is in indoor set (4).
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| CN105890211B (en) * | 2016-04-08 | 2018-05-08 | 陈建平 | A kind of accumulation of energy interconnection heat pump system of suitable cold district heat supply |
| CN105783317B (en) * | 2016-04-19 | 2018-08-28 | 上海理工大学 | Continuous heat supply phase-changing energy-storing overlapping air source heat pump experimental system |
| CN109357438A (en) * | 2018-11-30 | 2019-02-19 | 山东陆海新能源技术有限公司 | The low-temperature air source heat pump of afterheat recovery type removes defrosting system |
| CN110779241A (en) * | 2019-11-25 | 2020-02-11 | 开平市高美空调设备有限公司 | Overlapping type energy storage defrosting device of air source heat pump |
| CN115013889B (en) * | 2022-06-21 | 2024-01-26 | 同济大学 | Environment-independent rotating wheel dehumidification regeneration system |
| CN116182432B (en) * | 2023-02-22 | 2024-04-19 | 大连理工大学 | Overlapping type compressed PVT-air source heat pump system for supplying heat without intermittent defrosting alternately |
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