CN107655237A - Air source heat pump system - Google Patents
Air source heat pump system Download PDFInfo
- Publication number
- CN107655237A CN107655237A CN201711071733.4A CN201711071733A CN107655237A CN 107655237 A CN107655237 A CN 107655237A CN 201711071733 A CN201711071733 A CN 201711071733A CN 107655237 A CN107655237 A CN 107655237A
- Authority
- CN
- China
- Prior art keywords
- defrosting
- fluid path
- main fluid
- import
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
-
- 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
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a kind of air source heat pump system, and it includes：Finned coil heat exchanger, the inside of the finned coil heat exchanger are provided with main fluid path and defrosting road, and one end of finned coil heat exchanger is provided with main fluid path import and main fluid path exports, and the other end of finned coil heat exchanger is provided with defrosting road import and defrosting way outlet；Main frame, the main frame are communicated in main fluid path import and main fluid path outlet；And defrost heat exchanger, the defrost heat exchanger are communicated in defrosting road import and defrosting way outlet.The air source heat pump system in finned coil heat exchanger by setting special defrosting road, the commutation defrosting of original four-way is instead of, noise when avoiding four-way switching and main fluid path operating condition caused by the refrigerant reverse flow of main fluid path is complicated, reliability is low.
Description
Technical field
The present invention relates to a kind of air source heat pump system.
Background technology
In use for some time, its fin surface can frosting for air source heat pump system.If fin surface frosting, will
Increase heat transfer resistance, the heat absorption capacity decay of finned heat exchanger, the decay of unit heating capacity, cause low pressure alarming to stop when serious
Machine.
The Defrost mode of prior art, the commutation defrosting of generally use four-way, when finned heat exchanger needs defrosting, four-way is cut
Change, evaporator when finned heat exchanger is from normally heating is changed into condenser；Condenser when case tube heat exchanger is by normally heating becomes
For evaporator.Case tube heat exchanger, heat is absorbed from hot water, the defrosting for finned heat exchanger.Refrigerant reverse flow, main liquid
Road operating condition is complicated, reliability is low；During defrosting, hot water temperature can reduce.Because four-way switches, its spike noise is high, and
It is general to be not easy to realize that substep defrosts.
The content of the invention
The technical problem to be solved in the present invention is that prior art Defrost mode is complicated, reliability is low and noise in order to overcome
A kind of the defects of high, there is provided air source heat pump system of preferably Defrost mode.
The present invention is that solve above-mentioned technical problem by following technical proposals：
A kind of air source heat pump system, it includes：
Finned coil heat exchanger, the inside of the finned coil heat exchanger are provided with main fluid path and defrosting road, finned coil heat exchange
One end of device is provided with main fluid path import and main fluid path exports, and the other end of finned coil heat exchanger is provided with defrosting road import and defrosting
Way outlet；
Main frame, the main frame are communicated in main fluid path import and main fluid path outlet；And
Defrost heat exchanger, the defrost heat exchanger are communicated in defrosting road import and defrosting way outlet.
Preferably, main fluid path import is provided with main fluid path control valve, and defrosting road import and defrosting way outlet are equipped with defrosting road
Control valve.
Preferably, main fluid path control valve is magnetic valve, and/or, defrosting road control valve is electrical ball valve.
Preferably, main frame includes：Interconnected condenser and compressor.
Preferably, air source heat pump system also includes gas-liquid separator and oil eliminator, and gas-liquid separator is communicated in main liquid
Between way outlet and compressor, oil eliminator is communicated between compressor and condenser.
Preferably, main fluid path passage and defrosting paths, main fluid path passage and defrosting paths are provided with defrost heat exchanger
Between can occur heat exchange, defrosting road import and defrosting way outlet are communicated in defrosting paths, and main fluid path passage is communicated in master
Between machine and main fluid path import.
Preferably, defrosting road upwardly extends in the whole length side of the fin of finned coil heat exchanger.
Preferably, main fluid path import is provided with restriction expansion device.
Preferably, finned coil heat exchanger also includes fin, the first knockout and the second knockout, the connection of the first knockout
Between fin and main fluid path import, for by multiple main fluid path entrances of one end of the working medium guide fin of main fluid path import,
Second knockout is communicated between fin and defrosting road import, for by the other end of the working medium guide fin for the road import that defrosts
Multiple defrosting road entrances.
Preferably, the first knockout is seedpod of the lotus head-like structure.
The positive effect of the present invention is：The air source heat pump system is special by being set in finned coil heat exchanger
The defrosting road of door, the commutation defrosting of original four-way is instead of, the refrigerant of noise and main fluid path when avoiding four-way switching is inverse
Main fluid path operating condition caused by flowing is complicated, reliability is low.
Brief description of the drawings
Fig. 1 is the part-structure schematic diagram of the air source heat pump system of the preferred embodiments of the present invention.
Fig. 2 is another part structural representation of the air source heat pump system of the preferred embodiments of the present invention.
Fig. 3 is the structural representation of the fin of the preferred embodiments of the present invention.
Description of reference numerals：
Air source heat pump system 10
Finned coil heat exchanger 11
Main fluid path 12
Defrosting road 13
Main fluid path import 14
Main fluid path outlet 15
Defrost road import 16
Defrost way outlet 17
Fin 18
Main fluid path entrance 191
Defrost road entrance 192
First knockout 20
Second knockout 21
Heating power expansion valve 22
Main fluid path control valve 23
Defrost road control valve 24
Gas-liquid separator 25
Compressor 26
Oil eliminator 27
Condenser 28
Defrost heat exchanger 29
Blower fan 30
Embodiment
Below in conjunction with the accompanying drawings, the present invention is further illustrated by way of embodiment, but is not therefore limited the invention to
Among described scope of embodiments.
As Figure 1-3, air source heat pump system 10 includes：Finned coil heat exchanger 11, main frame, the and of defrost heat exchanger 29
Blower fan 30.Arrow in Fig. 1-3 represents the flow direction of the working medium in pipeline.
Blower fan 30 is blown to finned coil heat exchanger 11, for accelerating the heat exchange of finned coil heat exchanger 11 and air.
As shown in figure 1, one end of finned coil heat exchanger 11 is provided with main fluid path import 14 and main fluid path outlet 15.Such as Fig. 2
Shown, the other end of finned coil heat exchanger 11 is provided with defrosting road import 16 and defrosting way outlet 17.Fig. 1 illustrates finned coil
The attachment structure of one end of heat exchanger 11, and Fig. 2 illustrates the attachment structure of the other end of finned coil heat exchanger 11.Such as Fig. 3
Shown, the inside of finned coil heat exchanger 11 is provided with main fluid path 12 and defrosting road 13.Main frame is communicated in main fluid path import 14 and master
Fluid path outlet 15.Defrost heat exchanger 29 is communicated in defrosting road import 16 and defrosting way outlet 17.
Main fluid path import 14 is provided with main fluid path control valve 23, and defrosting road import 16 and defrosting way outlet 17 are equipped with defrosting road
Control valve 24.In the present embodiment, main fluid path control valve 23 is magnetic valve.Selectively, main fluid path control valve 23 can also be
Other kinds of control valve, it is used for the opening and closing for controlling main fluid path import 14.Defrosting road control valve 24 is electrical ball valve.It may be selected
Ground, defrosting road control valve 24 can also be other kinds of control valve, and it is used to control defrosting road import 16 and defrosting way outlet
17 opening and closing.
By setting main fluid path control valve 23 and defrosting road control valve 24, it is possible to achieve to point of finned coil heat exchanger 11
Step defrosting.It can be selected by controlling the opening and closing of defrosting road control valve 24 corresponding to each finned coil heat exchanger 11 only to more
One or more of individual finned coil heat exchanger 11 is defrosted, and can also select multiple finned coil heat exchangers 11
The sequencing of defrosting.For example, finned coil heat exchanger 11 preferentially more serious to frosting can be selected to defrost.
Main frame includes：Interconnected condenser 28 and compressor 26.Condenser 28 and compressor 26 are air source heat pump
The universal architecture of system 10, is repeated no more.
Air source heat pump system 10 also includes gas-liquid separator 25 and oil eliminator 27, and gas-liquid separator 25 is communicated in main liquid
Between way outlet 15 and compressor 26, oil eliminator 27 is communicated between compressor 26 and condenser 28.Gas-liquid separator 25 is used
Separated in by the liquid refrigerant in pipeline and gaseous working medium, so as to which gaseous working medium only is imported into compressor 26, and liquid refrigerant is not
Need into overcompression machine 26.Oil eliminator 27 is used to the fluid (lubricating oil of compressor 26) in working medium is separated and followed again
Ring is in compressor 26.Working medium in air source heat pump system 10 can be freon.
Main fluid path passage and defrosting paths, energy between main fluid path passage and defrosting paths are provided with defrost heat exchanger 29
Heat exchange enough occurs, defrosting road import 16 and defrosting way outlet 17 are communicated in defrosting paths, and main fluid path passage is communicated in main frame
Between main fluid path import 14.So, the heat of the working medium in main fluid path can be utilized to heat up the working medium in defrosting road.
As shown in figure 3, defrosting road upwardly extends in the whole length side of the fin of finned coil heat exchanger 11, so as to whole
Individual fin is defrosted.
Main fluid path import 14 is provided with restriction expansion device.Restriction expansion device can be heating power expansion valve 22.
Finned coil heat exchanger 11 also includes fin 18, the first knockout 20 and the second knockout 21, the first knockout 20
It is communicated between fin and main fluid path import 14, for by multiple masters of one end of the working medium guide fin 18 of main fluid path import 14
Fluid path entrance 191, the second knockout 21 be communicated in fin 18 and defrosting road import 16 between, for by defrost road import 16 work
Multiple defrosting roads entrance 192 of the other end of matter guide fin 18.
First knockout 20 is seedpod of the lotus head-like structure.Second knockout 21 is platy structure.First knockout 20 and second
The structure of knockout 21 is to coordinate the distribution shape of main fluid path entrance 191 and defrosting road entrance 192 on fin 18.
The working method of air source heat pump system 10 is briefly described below in conjunction with Fig. 1-3.
When air source heat pump system 10 normally heats, all defrosting road control valves 24 are closed, all main fluid path control valves
23 open, and with air heat exchange occurs for the working medium in finned coil heat exchanger 11, absorbs the heat in air, is converted by liquid
For gaseous state, turn into the gaseous working medium of low-temp low-pressure, then from the outflow of main fluid path outlet 15, by gas-liquid separator 25, low temperature is low
The gaseous working medium of pressure is compressed to the gaseous working medium of HTHP in compressor 26, and the gaseous working medium of HTHP passes through oil
The liquid refrigerant of HTHP is condensed into condenser 28 from device 27, (is not illustrated in figure, in order to anti-by device for drying and filtering
Stagnant ice blocks up), into the main fluid path passage (working medium in heating defrosting paths) of defrost heat exchanger 29, the liquid of the HTHP
After working medium is too cold due to the working medium generation heat exchange in the paths that defrosted with heating, by main fluid path control valve 23, into heat
Power expansion valve 22, throttling expansion enter fin, so as to complete air into the two-phase fluid of low-temp low-pressure by the first knockout 20
The normal heating circulation of source heat pump system 10.
When air source heat pump system 10 needs to carry out defrosting operation, here exemplified by defrosting step by step, i.e., to finned coil
Multiple fins in heat exchanger 11 defrost successively, in the present embodiment, the fin in figure are defrosted successively from left to right, by Fig. 2
In the main fluid path control valve 23 of leftmost finned coil heat exchanger 11 close, and open leftmost finned coil in Fig. 3 and change
The defrosting road import 16 of hot device 11 and the defrosting road control valve 24 for the way outlet 17 that defrosts, due to pressure differential, (pressure differential can be by
Air pump is formed), defrost heat exchanger in high-pressure working medium steam (working medium can it is identical with the working medium in main fluid path can not also
Flow into leftmost finned coil heat exchanger 11 together), during defrosting, the gaseous working medium of HTHP is condensed into liquid, liquid
Body pushes back defrosting heat exchanger by air-flow, and heat flashes to steam again, due to finned coil heat exchanger 11 and the heat exchanger that defrosts
Difference in height (finned coil heat exchanger 11 is set must be higher than defrosting heat exchanger), can form flow circuits, continue defrosting circulation, when
After reaching defrosting exit criteria, the defrosting road import 16 of leftmost finned coil heat exchanger 11 and the way outlet 17 that defrosts are closed
Defrost road control valve 24, opens the defrosting road of the defrosting road import 16 of next finned coil heat exchanger 11 and the way outlet 17 that defrosts
Control valve 24, by that analogy, until all finned coil heat exchangers 11 all complete defrosting.
During defrosting, the acting of compressor 26 is unloaded to normal 50%, to ensure flow matches.
The air source heat pump system 10 instead of original by setting special defrosting road in finned coil heat exchanger 11
Four-way commutation defrosting, avoid four-way switching when noise and main fluid path refrigerant reverse flow caused by main fluid path run
Operating mode is complicated, reliability is low.And the air source heat pump system 10 can realize that substep defrosts, can also be tieed up while defrosting
Hold certain heating capacity.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right", " perpendicular
Directly ", the orientation of the instruction such as " level ", " top ", " bottom ", " interior ", " outer " or position relationship are based on orientation shown in the drawings or position
Relation is put, it is of the invention necessary with simplified description, rather than the device or element of instruction or hint meaning to be for only for ease of description
With specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Although the embodiment of the present invention is the foregoing described, it will be appreciated by those of skill in the art that this is only
For example, protection scope of the present invention is to be defined by the appended claims.Those skilled in the art without departing substantially from
On the premise of the principle and essence of the present invention, various changes or modifications can be made to these embodiments, but these changes and
Modification each falls within protection scope of the present invention.
Claims (10)
1. a kind of air source heat pump system, it is characterised in that it includes：
Finned coil heat exchanger, the inside of the finned coil heat exchanger are provided with main fluid path and defrosting road, and the finned coil changes
One end of hot device is provided with main fluid path import and main fluid path exports, and the other end of the finned coil heat exchanger is provided with defrosting road import
With defrosting way outlet；
Main frame, the main frame are communicated in the main fluid path import and main fluid path outlet；And
Defrost heat exchanger, the defrost heat exchanger are communicated in defrosting road import and the defrosting way outlet.
2. air source heat pump system as claimed in claim 1, it is characterised in that the main fluid path import controls provided with main fluid path
Valve, defrosting road import and the defrosting way outlet are equipped with defrosting road control valve.
3. air source heat pump system as claimed in claim 2, it is characterised in that the main fluid path control valve is magnetic valve, and/
Or, the defrosting road control valve is electrical ball valve.
4. air source heat pump system as claimed in claim 1, it is characterised in that the main frame includes：Interconnected condensation
Device and compressor.
5. air source heat pump system as claimed in claim 4, it is characterised in that the air source heat pump system also includes gas-liquid
Separator and oil eliminator, the gas-liquid separator are communicated between the main fluid path outlet and compressor, the oil eliminator
It is communicated between the compressor and the condenser.
6. air source heat pump system as claimed in claim 1, it is characterised in that lead in the defrost heat exchanger provided with main fluid path
Road and defrosting paths, can occur heat exchange between the main fluid path passage and defrosting paths, the defrosting road import and
Defrosting way outlet is communicated in the defrosting paths, and the main fluid path passage is communicated between main frame and the main fluid path import.
7. air source heat pump system as claimed in claim 1, it is characterised in that the defrosting road exchanges heat in the finned coil
The whole length side of the fin of device upwardly extends.
8. air source heat pump system as claimed in claim 1, it is characterised in that the main fluid path import fills provided with throttling expansion
Put.
9. air source heat pump system as claimed in claim 1, it is characterised in that the finned coil heat exchanger also includes wing
Piece, the first knockout and the second knockout, first knockout are communicated between the fin and the main fluid path import, are used
Multiple main fluid path entrances in one end that the working medium of main fluid path import is oriented to the fin, second knockout are communicated in institute
State between fin and the defrosting road import, the multiple of the other end for the working medium for the road import that defrosts to be oriented to the fin remove
White road entrance.
10. air source heat pump system as claimed in claim 9, it is characterised in that first knockout is seedpod of the lotus head knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071733.4A CN107655237A (en) | 2017-11-03 | 2017-11-03 | Air source heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711071733.4A CN107655237A (en) | 2017-11-03 | 2017-11-03 | Air source heat pump system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107655237A true CN107655237A (en) | 2018-02-02 |
Family
ID=61096465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711071733.4A Withdrawn CN107655237A (en) | 2017-11-03 | 2017-11-03 | Air source heat pump system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107655237A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274412A (en) * | 2019-07-02 | 2019-09-24 | 上海柯茂机械有限公司 | It is distributed defrost heat pump system |
| CN110360764A (en) * | 2019-07-02 | 2019-10-22 | 上海柯茂机械有限公司 | Using the air-cooled heat pump unit of distribution defrosting |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202915610U (en) * | 2012-09-19 | 2013-05-01 | 宁波奥克斯电气有限公司 | Dispenser |
| CN203286825U (en) * | 2013-05-15 | 2013-11-13 | 东南大学 | Defrosting device of air source heat pump |
| CN205747589U (en) * | 2016-05-16 | 2016-11-30 | 叶立英 | A kind of heat-exchange system and there is the heat pump of defrosting function |
| CN206430403U (en) * | 2017-01-19 | 2017-08-22 | 清华大学 | A kind of low-temperature air source heat harvester of band from the function that defrosts |
| CN207515277U (en) * | 2017-11-03 | 2018-06-19 | 上海柯茂机械有限公司 | Air source heat pump system |
-
2017
- 2017-11-03 CN CN201711071733.4A patent/CN107655237A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202915610U (en) * | 2012-09-19 | 2013-05-01 | 宁波奥克斯电气有限公司 | Dispenser |
| CN203286825U (en) * | 2013-05-15 | 2013-11-13 | 东南大学 | Defrosting device of air source heat pump |
| CN205747589U (en) * | 2016-05-16 | 2016-11-30 | 叶立英 | A kind of heat-exchange system and there is the heat pump of defrosting function |
| CN206430403U (en) * | 2017-01-19 | 2017-08-22 | 清华大学 | A kind of low-temperature air source heat harvester of band from the function that defrosts |
| CN207515277U (en) * | 2017-11-03 | 2018-06-19 | 上海柯茂机械有限公司 | Air source heat pump system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110274412A (en) * | 2019-07-02 | 2019-09-24 | 上海柯茂机械有限公司 | It is distributed defrost heat pump system |
| CN110360764A (en) * | 2019-07-02 | 2019-10-22 | 上海柯茂机械有限公司 | Using the air-cooled heat pump unit of distribution defrosting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6685409B2 (en) | Air conditioner | |
| CN109405365A (en) | Refrigerant circulation system, control method thereof and air conditioning device | |
| JPWO2013111177A1 (en) | Air conditioner | |
| CN106288562A (en) | The defrosting of a kind of air source heat pump system controls devices and methods therefor | |
| WO2015140951A1 (en) | Air conditioner | |
| JP6161741B2 (en) | Air conditioner | |
| KR101737365B1 (en) | Air conditioner | |
| CN211575632U (en) | Heat pump air conditioning system | |
| CN104236155B (en) | Have that coolant is supercool, the defrosting air conditioning system of heat-production functions and control method thereof | |
| CN102759193B (en) | Air source heat pump system | |
| EP3106768B1 (en) | Heat source-side unit and air conditioning device | |
| KR100225636B1 (en) | Airconditioner for both cooling and warming | |
| CN108007016A (en) | Heat pump system and control method for heat pump system | |
| CN107655237A (en) | Air source heat pump system | |
| CN109442794A (en) | A kind of air-conditioning refrigeration system, Defrost method and air conditioner | |
| CN106288484A (en) | A kind of air source heat pump system and defrosting control method thereof | |
| JPWO2020115812A1 (en) | Air conditioner | |
| KR20140145025A (en) | Out door unit capable of defrosting and heat pump system including the out door unit | |
| CN107499089A (en) | A kind of electric automobile heat-pump air-conditioning system and its method of work | |
| CN207515277U (en) | Air source heat pump system | |
| CN106595118A (en) | Air-cooled cold and hot water unit | |
| EP3290827A1 (en) | Defrosting without reversing refrigerant cycle | |
| CN111076459A (en) | Heat pump air conditioning system and control method thereof | |
| CN206514566U (en) | Air-cooled cold and hot water unit | |
| CN214199280U (en) | Air source heat pump unit with heat pipe defrosting function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180202 |