CN108954980A - A kind of finned evaporator, heat pump system and control method - Google Patents
A kind of finned evaporator, heat pump system and control method Download PDFInfo
- Publication number
- CN108954980A CN108954980A CN201810642298.4A CN201810642298A CN108954980A CN 108954980 A CN108954980 A CN 108954980A CN 201810642298 A CN201810642298 A CN 201810642298A CN 108954980 A CN108954980 A CN 108954980A
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- Prior art keywords
- evaporator
- economizer
- tube
- heat
- pressure
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Links
- 238000000034 method Methods 0.000 title claims abstract description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052802 copper Inorganic materials 0.000 claims abstract description 61
- 239000010949 copper Substances 0.000 claims abstract description 61
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 17
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 48
- 239000003507 refrigerant Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000004781 supercooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/02—Evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/13—Economisers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a kind of finned evaporator, heat pump system and control methods, it is characterized by comprising evaporator portions and economizer portion, the bottom in evaporator portion is arranged in the economizer portion, the heat exchanger components of the economizer are the concentric circular sleeve by two different tube diameters, respectively interior copper pipe and outer copper pipe；The access formed inside interior copper pipe is tube side, and the access that outer copper pipe and interior plumbers shed are formed is shell side；The evaporator portion includes heat exchange copper tube；The outer wall of the concentric circular sleeve and heat exchange copper tube is equipped with aluminum fin-stock.It by the way that economizer and evaporator to be combined, keeps base of evaporator and surface temperature to maintain 0 DEG C or more always using economizer, evaporation bottom surface is avoided frosting and icing phenomenon occur.
Description
Technical field
The present invention relates to air source heat pump technical field, in particular to a kind of finned evaporator, heat pump system and control
Method.
Background technique
In the existing low circumstance temperature net for air-source heat pump units for being used for northern heating and hot water, compressor is using air injection enthalpy-increasing warm
When pumping compressor, unit need to additionally configure economizer, occupy unit space.When unit work in 0 DEG C of environment below, remove
The water stayed when white, which can build-up ice rapidly, accumulates in finned evaporator bottom and its surface, and cumulative, to understand
Certainly this problem, evaporator fin bottom need place mat ice-melt heat tape, and it is hidden that the use of heat tape to unit brings electric leakage
Suffer from, also reduces the efficiency of unit.Although current finned evaporator bottom can do supercooling tube to replace heat tape,
Very little, ice-melt effect are poor for heat after economizer exchanges heat for refrigerant inside supercooling tube.
Summary of the invention
The technical problem to be solved by the present invention is to how not need additionally to increase equipment and energy consumption solution evaporator
Defrost and remove ice problem in bottom.
In order to solve the above-mentioned technical problem, the present invention devises a kind of finned evaporator, it is characterised in that including evaporation
The bottom in evaporator portion is arranged in device portion and economizer portion, the economizer portion, and the heat exchanger components of the economizer are by neither
With the concentric circular sleeve of caliber, respectively interior copper pipe and outer copper pipe；The access formed inside interior copper pipe is tube side, outer copper pipe with it is interior
The access that plumbers shed is formed is shell side；The evaporator portion includes heat exchange copper tube；The concentric circular sleeve and heat exchange copper tube it is outer
Wall is equipped with aluminum fin-stock.
The finned evaporator, it is characterised in that the interior copper pipe and outer copper pipe directly pass through be uniformly arranged 2 with
On fin be supported connection.
The finned evaporator, it is characterised in that the heat exchange copper tube in evaporator portion uses inner screw thread copper pipe.
The finned evaporator, it is characterised in that the aluminum fin-stock in the evaporator portion and the economizer portion is integrally set
It sets.
A kind of heat pump system, it is characterised in that including compressor, finned evaporator, water-side heat, the compressor
It is connected respectively with evaporator, gas-liquid separator and water-side heat by four-way valve, finned evaporator includes as evaporation
The bottom of the evaporator is arranged in the evaporator portion and the economizer portion used as economizer, the economizer that device uses,
And it is wholely set.
The heat pump system, it is characterised in that the heat exchange copper tube of economizer is bushing type, specially by two different tube diameters
Concentric circular sleeve, respectively inner and outer tubes；The access that internal tube is formed is tube side, the access formed between outer tube and inner tube
For shell side；The economizer and the finned evaporator share aluminum fin-stock.
The heat pump system, it is characterised in that further include that gas-liquid separator, liquid storage device, first filter, auxiliary electronics are swollen
Swollen valve, main electric expansion valve, the second filter and liquid-dividing head；Compressor is connected with the D of four-way valve mouth；Evaporator and four-way valve
E mouth be connected, gas-liquid separator is connected with the S of four-way valve mouth, water-side heat is connected with the C of four-way valve mouth；Water side
Heat exchanger is connected with liquid storage device, then by dividing two-way after first filter, is connected all the way with the shell side of the economizer of bushing type, separately
It is connected after the reducing pressure by regulating flow of auxiliary electric expansion valve with the tube side of economizer all the way；It is swollen that the outlet of economizer first passes through main electronics
Swollen valve by the second filter is followed by being connected after liquid-dividing head with finned evaporator again.
The heat pump system, it is characterised in that said inner tube and outer tube directly pass through 2 or more fin being uniformly arranged
It is supported connection.
The heat pump system, it is characterised in that the heat exchange copper tube in evaporator portion uses inner screw thread copper pipe.
A kind of heat pump system control method, it is characterised in that control compressor sucks the gaseous refrigerant of low-temp low-pressure,
The gaseous refrigerant of low-temp low-pressure is compressed by the compressor the gaseous state that rear state becomes high temperature and pressure within the compressor, passes through four-way valve
Laggard water inlet side heat exchanger heats water, is condensed into the liquid of high temperature and pressure, and set is entered after liquid storage device and filter
The economizer of tubular type, initially entering heat exchange copper tube is double pipe heat exchanger, walks shell side all the way, and another way passes through auxiliary electric expansion valve
Reducing pressure by regulating flow after become the gas-liquid mixed state cold-producing medium of medium temperature and medium pressure and enter tube side, the evaporation of tube side refrigerant absorbs the height of shell side
The heat of warm high pressure liquid refrigerant becomes the gaseous state of medium temperature and medium pressure, is filled into the middle pressure mouth of compressor, meanwhile, walk shell side
High temperature and pressure liquid refrigerant constantly transmits heat by outer copper pipe and aluminum fin-stock outward, keep finned evaporator bottom and its
Surface temperature, by deeply undercooling at medium temperature high pressure liquid refrigerant, drops always at 0 DEG C or more by the throttling of main electric expansion valve
Become low-temp low-pressure gas-liquid mixed state cold-producing medium after pressure, successively enters finned evaporator by filter and liquid-dividing head, with room
Outer Cryogenic air exchanges heat, and is evaporated into the gaseous state of low-temp low-pressure, and compression is returned to after four-way valve and gas-liquid separator
Machine enters subsequent cycle.
Implement to protect the invention has the following beneficial effects: by being combined economizer and evaporator using economizer
It holds base of evaporator and surface temperature and maintains 0 DEG C or more always, evaporation bottom surface is avoided frosting and icing phenomenon occur.
Detailed description of the invention
Fig. 1 is the main view of finned evaporator；
Fig. 2 is the left view of finned evaporator；
Fig. 3 is double pipe heat exchanger diagrammatic cross-section；
Fig. 4 is low circumstance temperature air source heat pump system block diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Fig. 1 is the main view of finned evaporator；Fig. 2 is the vertical left view of finned evaporator.Finned evaporation
Device includes evaporator portion 200 and economizer portion 300, and the bottom in evaporator portion 200 is arranged in economizer portion 300.Economizer changes
Thermal part is the concentric circular sleeve by two different tube diameters, respectively interior copper pipe 302 and outer copper pipe 303；It is formed inside interior copper pipe
Access is tube side B, and the access that outer copper pipe and interior plumbers shed are formed is shell side A；The evaporator portion includes heat exchange copper tube；Concentric circles
The outer wall of casing and heat exchange copper tube is equipped with aluminum fin-stock 400.
Finned evaporator is integrally made of upper and lower two parts, and bottom part function is that economizer portion makes as economizer
With middle and upper part function is that evaporator is used as evaporator.Fig. 3 is double pipe heat exchanger diagrammatic cross-section；Bottom economizer
Heat exchange copper tube is bushing type, connects into concentric circular sleeve by two kinds of different copper pipes of size, outer copper pipe and interior copper pipe inner wall are made
Shape of threads reinforces heat exchange, while interior copper pipe outer is also formed with the fin 304 for reinforcing heat exchange, and outer copper pipe outer is connected with aluminum fin-stock
400, it is shell side between outer copper pipe and interior copper pipe, is tube side inside interior copper pipe.Shell side walks the high-temperature high-pressure liquid flowed out from condenser
State refrigerant transmits heat by outer copper pipe and aluminum fin-stock, keeps finned evaporator bottom and its surface temperature always 0
DEG C or more, finned evaporator bottom and its surface are tentatively cooled down without ice sheet phenomenon, liquid refrigerant is accumulated.During tube side is walked
The gas-liquid mixed state cold-producing medium of middle benefit gas pressure is exchanged heat with high temperature and pressure liquid refrigerant by interior copper pipe wall and fin, quilt
It flashes to be inhaled into compressor after gaseous state and presses mouth, liquid refrigerant is further cooled down at this time.
Middle and upper part evaporator heat exchange copper pipe is common inner screw thread copper pipe, and copper pipe outer is connected with aluminum fin-stock, also with shunting
The liquid-dividing head of refrigerant and the gas collecting tube for collecting gaseous refrigerant, low-temp low-pressure gas-liquid mixed state cold-producing medium enter from liquid-dividing head,
Each circuit of evaporator is assigned to by liquid-dividing head, low-temp low-pressure gas-liquid mixed state cold-producing medium passes through copper pipe and aluminum fin-stock and outdoor air
Heat exchange, is evaporated into the gaseous state of low-temp low-pressure, flows out after being pooled to gas collecting tube.
Fig. 4 is low circumstance temperature air source heat pump system block diagram, and system specifically includes that evaporator 4, four-way valve 5, compressor 7, water
Side heat exchanger 8, gas-liquid separator 6, liquid storage device 10, first filter 9, economizer 12, auxiliary electric expansion valve 11, main electronic expansion
Valve 3, the second filter 2 and liquid-dividing head 1.Compressor is connected with the D of four-way valve mouth；Evaporator is connected with the E of four-way valve mouth,
Gas-liquid separator is connected with the S of four-way valve mouth, and water-side heat is connected with the C of four-way valve mouth；Water-side heat and liquid storage
Device is connected, then by dividing two-way after first filter, is connected all the way with the shell side of the economizer of bushing type, another way passes through auxiliary electricity
It is connected after the reducing pressure by regulating flow of sub- expansion valve with the tube side of economizer.The outlet of economizer first passes through main electric expansion valve, passes through again
Second filter is connected after being followed by liquid-dividing head with finned evaporator.Evaporator 4 is the middle and upper part of finned evaporator, warp
Ji device 12 is the bottom of finned evaporator.
Compressor sucks the gaseous refrigerant of low-temp low-pressure, and the gaseous refrigerant of low-temp low-pressure is compressed by the compressor rear shape
State becomes the gaseous state of high temperature and pressure, heats water by the laggard water inlet side heat exchanger of four-way valve, is condensed into high temperature and pressure
Liquid, after liquid storage device and filter enter bushing type economizer, initially enter heat exchange copper tube be double pipe heat exchanger, one
Shell side is walked on road, and the gas-liquid mixed state cold-producing medium that another way becomes medium temperature and medium pressure after the reducing pressure by regulating flow of auxiliary electric expansion valve enters
Tube side, the evaporation of tube side refrigerant absorb the heat of the high temperature and pressure liquid refrigerant of shell side, become the gaseous state of medium temperature and medium pressure, mended
Enter the middle pressure mouth of compressor, meanwhile, the high temperature and pressure liquid refrigerant of shell side is walked by outer copper pipe and aluminum fin-stock constantly to unofficial biography
Heat is passed, keeps finned evaporator bottom and its surface temperature always at 0 DEG C or more, by deeply undercooling at medium temperature high-pressure liquid
Refrigerant becomes low-temp low-pressure gas-liquid mixed state cold-producing medium after the reducing pressure by regulating flow of main electric expansion valve, successively by filtering
Device and liquid-dividing head enter finned evaporator, exchange heat with outdoor Cryogenic air, are evaporated into the gaseous state of low-temp low-pressure, pass through
It crosses after four-way valve and gas-liquid separator and returns to compressor and enter subsequent cycle.
When bottom casing type heat exchanging copper pipe and aluminum fin-stock as economizer in use, the high temperature and pressure liquid of shell fluid flow
Refrigerant transmits heat by outer copper pipe and aluminum fin-stock, keeps finned evaporator bottom and its surface temperature always at 0 DEG C
More than, without accumulating ice sheet phenomenon, the water that when defrosting generates can be smoothly discharged to outside machine for finned evaporator bottom and its surface,
Without using heat tape, heat exchanger heat exchange is protected, and unit is safe and reliable to operation.Meanwhile high temperature and pressure liquid refrigerant
It exchanges heat in shell side and jointly outside shell side, not only the gas-liquid mixed state cold-producing medium heat exchange with air heat-exchange but also with medium temperature and medium pressure, supercooling
Degree obtains maximum raising, and unit operation efficiency gets a promotion.
Disclosed above is only an embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention
Made equivalent variations is sought, is still belonged to the scope covered by the invention.
Claims (10)
1. a kind of finned evaporator, it is characterised in that including evaporator portion and economizer portion, the economizer portion setting is being steamed
Send out the bottom in device portion, the heat exchanger components of the economizer are the concentric circular sleeve by two different tube diameters, respectively in copper pipe and outer
Copper pipe；The access formed inside interior copper pipe is tube side, and the access that outer copper pipe and interior plumbers shed are formed is shell side；The evaporator portion
Including heat exchange copper tube；The outer wall of the concentric circular sleeve and heat exchange copper tube is equipped with aluminum fin-stock.
2. finned evaporator according to claim 1, it is characterised in that the interior copper pipe and outer copper pipe directly pass through
2 or more fin of even setting is supported connection.
3. finned evaporator according to claim 1, it is characterised in that the heat exchange copper tube in evaporator portion uses interior spiral shell
Line copper pipe.
4. finned evaporator according to claim 1, it is characterised in that the evaporator portion and the economizer portion
Aluminum fin-stock is wholely set.
5. a kind of heat pump system, it is characterised in that including compressor, finned evaporator, water-side heat, the compressor is logical
It crosses four-way valve to be connected with evaporator, gas-liquid separator and water-side heat respectively, finned evaporator includes being used as evaporator
The bottom of the evaporator is arranged in the evaporator portion used and the economizer portion used as economizer, the economizer, and
It is wholely set.
6. heat pump system according to claim 5, it is characterised in that the heat exchange copper tube of economizer be bushing type, specially by
The concentric circular sleeve of two different tube diameters, respectively inner and outer tubes；The access that internal tube is formed is tube side, between outer tube and inner tube
The access of formation is shell side；The economizer and the finned evaporator share aluminum fin-stock.
7. heat pump system according to claim 6, it is characterised in that further include gas-liquid separator, liquid storage device, the first filtering
Device, auxiliary electric expansion valve, main electric expansion valve, the second filter and liquid-dividing head；Compressor is connected with the D of four-way valve mouth；It steams
Device is connected hair with the E of four-way valve mouth, gas-liquid separator is connected with the S of four-way valve mouth, the C mouth of water-side heat and four-way valve
It is connected；Water-side heat is connected with liquid storage device, then by dividing two-way after first filter, all the way with the economizer of bushing type
Shell side is connected, and another way is connected after the reducing pressure by regulating flow of auxiliary electric expansion valve with the tube side of economizer；The outlet of economizer is first
It is followed by being connected after liquid-dividing head with finned evaporator by main electric expansion valve, again by the second filter.
8. heat pump system according to claim 7, it is characterised in that said inner tube and outer tube directly pass through 2 be uniformly arranged
Above fin is supported connection.
9. heat pump system according to claim 8, it is characterised in that the heat exchange copper tube in evaporator portion uses internal screw thread copper
Pipe.
10. a kind of heat pump system control method, it is characterised in that control compressor sucks the gaseous refrigerant of low-temp low-pressure, low
The gaseous refrigerant of warm low pressure is compressed by the compressor the gaseous state that rear state becomes high temperature and pressure within the compressor, after four-way valve
Water is heated into water-side heat, is condensed into the liquid of high temperature and pressure, the sleeve pipe after liquid storage device and filter
The economizer of formula, initially entering heat exchange copper tube is double pipe heat exchanger, walks shell side all the way, another way is by auxiliary electric expansion valve
The gas-liquid mixed state cold-producing medium for becoming medium temperature and medium pressure after reducing pressure by regulating flow enters tube side, and the evaporation of tube side refrigerant absorbs the high temperature of shell side
The heat of high pressure liquid refrigerant becomes the gaseous state of medium temperature and medium pressure, is filled into the middle pressure mouth of compressor, meanwhile, walk the height of shell side
Warm high pressure liquid refrigerant constantly transmits heat by outer copper pipe and aluminum fin-stock outward, keeps finned evaporator bottom and its table
Face temperature is always at 0 DEG C or more, by deeply undercooling at medium temperature high pressure liquid refrigerant, by the reducing pressure by regulating flow of main electric expansion valve
After become low-temp low-pressure gas-liquid mixed state cold-producing medium, successively enter finned evaporator by filter and liquid-dividing head, with outdoor
Cryogenic air exchange heat, be evaporated into the gaseous state of low-temp low-pressure, return to compressor after four-way valve and gas-liquid separator
Into subsequent cycle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810642298.4A CN108954980A (en) | 2018-06-21 | 2018-06-21 | A kind of finned evaporator, heat pump system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810642298.4A CN108954980A (en) | 2018-06-21 | 2018-06-21 | A kind of finned evaporator, heat pump system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108954980A true CN108954980A (en) | 2018-12-07 |
Family
ID=64491990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201810642298.4A Pending CN108954980A (en) | 2018-06-21 | 2018-06-21 | A kind of finned evaporator, heat pump system and control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542273A (en) * | 2019-09-02 | 2019-12-06 | 仲恺农业工程学院 | heat pump system and graded defrosting start-stop judgment method thereof |
| CN113551450A (en) * | 2021-07-20 | 2021-10-26 | 广东博益空调配套设备有限公司 | Flow-equalizing defrosting heat exchange device |
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