CN110260560A - A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump - Google Patents
A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump Download PDFInfo
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- CN110260560A CN110260560A CN201910655874.3A CN201910655874A CN110260560A CN 110260560 A CN110260560 A CN 110260560A CN 201910655874 A CN201910655874 A CN 201910655874A CN 110260560 A CN110260560 A CN 110260560A
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- 239000007788 liquid Substances 0.000 claims abstract description 23
- 238000001914 filtration Methods 0.000 claims abstract description 13
- 238000001035 drying Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003416 augmentation Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004781 supercooling Methods 0.000 description 1
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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- 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
- F25B40/00—Subcoolers, desuperheaters or superheaters
- F25B40/02—Subcoolers
-
- 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
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion 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
- F25B43/006—Accumulators
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- 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)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a kind of high-power single machine two-stage vortex ultra-low temperature air source heat pumps, including heat exchanger, subcooler, the first solenoid valve, second solenoid valve, the first check valve, the first electric expansion valve, the second electric expansion valve, economizer, device for drying and filtering, liquid storage device, second one-way valve, third solenoid valve, four-way reversing valve, shell and tube exchanger, the second electric expansion valve, single machine two-stage scroll compressor, gas-liquid separator, third check valve, oil eliminator, the first shut-off valve, the 4th solenoid valve, oil strainer, the second shut-off valve.Beneficial effect is application of the high-power single machine two-stage scroll compressor in air source heat pump, there is that single-machine capacity is big, occupied area is small, control is simple, highly reliable, noise is smaller, noise reduction is easily processed, the economical advantages such as higher；It can be heated in -35 DEG C of ambient temperature stables, and solve the problems, such as that Gas-supplying enthalpy-increasing type screw compressor air source heat pump cannot produce high-temperature-hot-water at low ambient temperatures.
Description
Technical field
The present invention relates to air source heat pump technical fields, and in particular to a kind of high-power single machine two-stage scroll compressor
The wide ultra-low temperature air source heat pump of range of operation.
Background technique
Air source heat pump product is by using the compressor classification mainly to have screw, vortex on the market at present, wherein screw rod
Formula has single machine single stage screw formula, single machine two-stage screw bolt formula, and vortex has single machine hydrojet vortex, single machine Gas-supplying enthalpy-increasing vortex.
For cold district in use, needing to produce high-temperature-hot-water, system high-low pressure span is larger in winter for air source heat pump, and one
As single-stage compressor it is difficult to ensure that efficient stable is run, and now mainly has vortex tonifying Qi for the air source heat pump of low-temperature heating
Increasing enthalpy type, screw single machine two-stage type.
Vortex Gas-supplying enthalpy-increasing type is that single-stage compressor increases compression chamber tonifying Qi, and in worst cold case operation, there are tonifying Qi
Amount is insufficient, heating decaying serious phenomenon, and because existing screw compressor separate unit power is too small, constrains the single machine of air source heat pump
Power, so that heat pump unit land occupation is larger in practical engineering project.
Screw single machine two-stage type is single compressor two stages of compression, and height two-stage shares entire heat pump system pressure ratio, is fitted
It to be got well with property compared with vortex Gas-supplying enthalpy-increasing type, but heat pump and compressor complete machine control difficulty are larger, heat pump system stability is not high；
And compressor noise is larger, cost needed for the noise problem in actual items application to solve compressor is larger, macroeconomic
Property is not high.
Summary of the invention
The purpose of the present invention is to provide a kind of high-power single machine two-stage vortex ultra-low temperature air source heat pumps, utilize vortex
The advantage that the noise of compressor is smaller than helical-lobe compressor noise and noise reduction is at low cost solves air source heat pump operation noise and asks
Topic；
Single machine two-stage screw compressor two stages of compression shares high-low pressure ratio, and air compensation is big, and complete machine efficiency is high, solves tonifying Qi and increases
Every disadvantage of enthalpy screw compressor；
It solves separate unit screw compressor power and crosses minor issue, using the single machine two-stage scroll compressor of separate unit 60HP, have
Effect solves vortex type air source heat pump and takes up an area problems of too.
To achieve the goals above, the invention provides the following technical scheme:
A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump comprising:
Single machine two-stage scroll compressor, exhaust outlet are divided into two branches, and a branch accesses oil eliminator, another branch
Access third solenoid valve；
Oil eliminator is connected with four-way reversing valve, and four-way reversing valve is connected with shell and tube exchanger；
Shell and tube exchanger is divided into two branches, and a branch accesses second one-way valve, and the second one-way valve is unidirectional with first
Valve is connected after converging with liquid storage device；Another branch accesses the second electric expansion valve；
Liquid storage device is connected with device for drying and filtering, and device for drying and filtering is connected with economizer；
Economizer is divided into two branches, and a branch accesses the second electric expansion valve, another branch is separated into two branches
It is respectively connected to the first solenoid valve, second solenoid valve；
Second electric expansion valve is connected with economizer, and economizer is connected with third check valve；Third check valve and list
Machine twin-stage scroll compressor is connected；
First solenoid valve is connected with subcooler；
Subcooler and second solenoid valve, which are converged, is separated into two branches, is respectively connected to the first electric expansion valve and the second electronics
Expansion valve；
First electric expansion valve is divided into two branches, and a branch is connected to heat exchanger, and another branch accesses the first check valve；
Heat exchanger is connected with four-way reversing valve；Four-way reversing valve is connected with gas-liquid separator；
Gas-liquid separator is divided into two branches, and a branch and the first shut-off valve converge rear and single machine two-stage scroll compressor
It is connected, another branch is connected with third solenoid valve；
Oil eliminator is connected with the second shut-off valve, and the second shut-off valve is connected with oil strainer, oil strainer and the 4th
Solenoid valve is connected, and the 4th solenoid valve is connected with the first shut-off valve.
Preferably, being provided with the axial flow blower of forced convertion above the heat exchanger.
Preferably, the heat exchanger is finned heat exchanger.
Preferably, the subcooler is fin subcooler.
Preferably, the single machine two-stage scroll compressor is the single machine two-stage scroll compressor of a 60HP.
High-power single machine two-stage vortex ultra-low temperature air source heat pump provided by the present invention, the beneficial effect is that:
1, application of the high-power single machine two-stage scroll compressor in air source heat pump, there is that single-machine capacity is big, land occupation
The advantages such as area is small；
2, it can be heated in -35 DEG C of ambient temperature stables, and solve Gas-supplying enthalpy-increasing type screw compressor air source heat pump
The problem of high-temperature-hot-water cannot be produced at low ambient temperatures；
3, the control of single machine two-stage scroll compressor is simple, highly reliable；
4, screw compressor noise is smaller, and noise reduction is easily processed, economical higher.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention
A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is the schematic diagram of high-power single machine two-stage vortex ultra-low temperature air source heat pump provided in an embodiment of the present invention.
Description of symbols:
1, axial flow blower；2, heat exchanger；3, subcooler；4, the first solenoid valve；5, second solenoid valve；6, the first check valve；
7, the first electric expansion valve；8, the second electric expansion valve；9, economizer；10, device for drying and filtering；11, liquid storage device；12, second is single
To valve；13, third solenoid valve；14, four-way reversing valve；15, shell and tube exchanger；16, the second electric expansion valve；17, single machine is double
Grade scroll compressor；18, gas-liquid separator；19, third check valve；20, oil eliminator；21, the first shut-off valve；22, the 4th
Solenoid valve；23, oil strainer；24, the second shut-off valve.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, below in conjunction with attached drawing to this hair
It is bright to be further detailed.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or the terminal device that include a series of elements not only include those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or end
The intrinsic element of end equipment.In the absence of more restrictions, being limited by sentence " including ... " or " including ... "
Element, it is not excluded that there is also other elements in process, method, article or the terminal device for including the element.This
Outside, herein, " being greater than ", " being less than ", " being more than " etc. are interpreted as not including this number；" more than ", " following ", " within " etc. understand
Being includes this number.
As shown in Figure 1, a kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump comprising heat exchanger 2, supercooling
Device 3, the first solenoid valve 4, second solenoid valve 5, the first check valve 6, the first electric expansion valve 7, the second electric expansion valve 8, economy
Device 9, device for drying and filtering 10, liquid storage device 11, second one-way valve 12, third solenoid valve 13, four-way reversing valve 14, shell and tube exchanger
15, the second electric expansion valve 16, single machine two-stage scroll compressor 17, gas-liquid separator 18, third check valve 19, oil eliminator
20, the first shut-off valve 21, the 4th solenoid valve 22, oil strainer 23, the second shut-off valve 24.
The connection relationship of above-mentioned each equipment is as follows:
Single machine two-stage scroll compressor 17, exhaust outlet are divided into two branches, and a branch accesses oil eliminator 20, another
Branch accesses third solenoid valve 13；
Oil eliminator 20 is connected with four-way reversing valve 14, and four-way reversing valve 14 is connected with shell and tube exchanger 15；
Shell and tube exchanger 15 is divided into two branches, and a branch accesses second one-way valve 12, the second one-way valve 12 and the
One check valve 6 is connected after converging with liquid storage device 11；Another branch accesses the second electric expansion valve 8；
Liquid storage device 11 is connected with device for drying and filtering 10, and device for drying and filtering 10 is connected with economizer 9；
Economizer 9 is divided into two branches, and a branch accesses the second electric expansion valve 16, another branch is separated into two branch
Road is respectively connected to the first solenoid valve 4, second solenoid valve 5；
Second electric expansion valve 16 is connected with economizer 9, and economizer 9 is connected with third check valve 19；Third is unidirectional
Valve 19 is connected with single machine two-stage scroll compressor 17；
First solenoid valve 4 is connected with subcooler 3；
Subcooler 3 and second solenoid valve 5, which are converged, is separated into two branches, is respectively connected to the first electric expansion valve 7 and second
Electric expansion valve 8；
First electric expansion valve 7 is divided into two branches, and a branch is connected to heat exchanger 2, and another branch accesses the first check valve
6；
Heat exchanger 2 is connected with four-way reversing valve 14；Four-way reversing valve 14 is connected with gas-liquid separator 18；
Gas-liquid separator 18 is divided into two branches, and a branch and the first shut-off valve 21 converge rear and single machine two-stage vortex pressure
Contracting machine 17 is connected, and another branch is connected with third solenoid valve 13；
Oil eliminator 20 is connected with the second shut-off valve 24, and the second shut-off valve 24 is connected with oil strainer 23, oil filtering
Device 23 is connected with the 4th solenoid valve 22, and the 4th solenoid valve 22 is connected with the first shut-off valve 21.
The top of the heat exchanger 2 is provided with the axial flow blower 1 of forced convertion.
The heat exchanger 2 preferably uses finned heat exchanger, and finned heat exchanger has significant augmentation of heat transfer effect.The mistake
Cooler 3 is preferably fin subcooler, and fin subcooler has the characteristics that heat transfer efficiency is high, small in size, light-weight.
The single machine two-stage scroll compressor 17 is the single machine two-stage scroll compressor of a 60HP.
The specific connection of port is closed between each equipment in above-mentioned high-power single machine two-stage vortex ultra-low temperature air source heat pump
It is as follows:
The exhaust outlet of single machine two-stage scroll compressor 17 is divided into two branches, and a branch accesses the air inlet of oil eliminator 20
Mouthful, the entrance of another branch access third solenoid valve 13.
The D mouth of the gas outlet access four-way reversing valve 14 of oil eliminator 20；The E mouth access shell-tube type of four-way reversing valve 14 changes
The a mouth of hot device 15.
The b mouth of shell and tube exchanger 15 is divided into two branches, and a branch accesses the entrance of second one-way valve 12, and second is unidirectional
The outlet of valve 12 accesses the entrance of liquid storage device 11 after converging with the outlet of the first check valve 6；It is swollen that another branch accesses the second electronics
The outlet of swollen valve 8.
The entrance of the outlet access device for drying and filtering 10 of liquid storage device 11.
The a mouth of the outlet access economizer 9 of device for drying and filtering 10.
The b mouth of economizer 9 is divided into two branches, and a branch accesses the entrance of the second electric expansion valve 16, another branch
It is separated into the entrance that two branches are respectively connected to the first solenoid valve 4, second solenoid valve 5.
The c mouth of the outlet access economizer 9 of second electric expansion valve 16；The d mouth access third check valve 19 of economizer 9
Entrance.
The economizer mouth of the outlet access single machine two-stage scroll compressor 17 of third check valve 19；First solenoid valve 4
The entrance of outlet access fin subcooler 3.
The outlet of fin subcooler 3 and the outlet of second solenoid valve 5, which converge, is separated into two branches, is respectively connected to the first electricity
The entrance of sub- expansion valve 7 and the second electric expansion valve 8.
The outlet of first electric expansion valve 7 is divided into two branches, and a branch accesses the liquid separation tube inlet of finned heat exchanger 2,
Another branch accesses the entrance of the first check valve 6.
The C mouth of the gas collection nozzle access four-way reversing valve 14 of finned heat exchanger 2, the S mouth of four-way reversing valve 14 access gas-liquid
The entrance of separator 18.
The outlet of gas-liquid separator 18 is divided into two branches, and the outlet of a branch and the first shut-off valve 21 accesses single after converging
The air entry of machine twin-stage scroll compressor 17, the outlet of another branch access third solenoid valve 13.
The oil outlet of oil eliminator 20 accesses the entrance of the second shut-off valve 24；The outlet access oil filtering of second shut-off valve 24
The entrance of device 23；The entrance of the 4th solenoid valve 22 of outlet access of oil strainer 23；The outlet access first of 4th solenoid valve 22
The entrance of shut-off valve 21.
Above-mentioned high-power single machine two-stage vortex ultra-low temperature air source heat pump, the beneficial effect is that:
1, application of the high-power single machine two-stage scroll compressor in air source heat pump, there is that single-machine capacity is big, land occupation
The advantages such as area is small；
2, it can be heated in -35 DEG C of ambient temperature stables, and solve Gas-supplying enthalpy-increasing type screw compressor air source heat pump
The problem of high-temperature-hot-water cannot be produced at low ambient temperatures；
3, the control of single machine two-stage scroll compressor is simple, highly reliable；
4, screw compressor noise is smaller, and noise reduction is easily processed, economical higher.
It is above that certain exemplary embodiments of the invention are only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute
The embodiment of description is modified.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as to the present invention
The limitation of claims.
Claims (5)
1. a kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump characterized by comprising
Single machine two-stage scroll compressor, exhaust outlet are divided into two branches, and a branch accesses oil eliminator, another branch access
Third solenoid valve；
Oil eliminator is connected with four-way reversing valve, and four-way reversing valve is connected with shell and tube exchanger；
Shell and tube exchanger is divided into two branches, and a branch accesses second one-way valve, and the second one-way valve and the first check valve converge
It is connected after conjunction with liquid storage device；Another branch accesses the second electric expansion valve；
Liquid storage device is connected with device for drying and filtering, and device for drying and filtering is connected with economizer；
Economizer is divided into two branches, and a branch accesses the second electric expansion valve, another branch is separated into two branch difference
Access the first solenoid valve, second solenoid valve；
Second electric expansion valve is connected with economizer, and economizer is connected with third check valve；Third check valve and single machine are double
Grade scroll compressor is connected；
First solenoid valve is connected with subcooler；
Subcooler and second solenoid valve, which are converged, is separated into two branches, is respectively connected to the first electric expansion valve and the second electronic expansion
Valve；
First electric expansion valve is divided into two branches, and a branch is connected to heat exchanger, and another branch accesses the first check valve；
Heat exchanger is connected with four-way reversing valve；Four-way reversing valve is connected with gas-liquid separator；
Gas-liquid separator is divided into two branches, and a branch is connected after converging with the first shut-off valve with single machine two-stage scroll compressor
Logical, another branch is connected with third solenoid valve；
Oil eliminator is connected with the second shut-off valve, and the second shut-off valve is connected with oil strainer, oil strainer and the 4th electromagnetism
Valve is connected, and the 4th solenoid valve is connected with the first shut-off valve.
2. high-power single machine two-stage vortex ultra-low temperature air source heat pump according to claim 1, which is characterized in that described
The axial flow blower of forced convertion is provided with above heat exchanger.
3. according to claim 1 or the high-power single machine two-stage vortex ultra-low temperature air source heat pump, which is characterized in that institute
Stating heat exchanger is finned heat exchanger.
4. high-power single machine two-stage vortex ultra-low temperature air source heat pump according to claim 1, which is characterized in that described
Subcooler is fin subcooler.
5. high-power single machine two-stage vortex ultra-low temperature air source heat pump according to claim 1, which is characterized in that described
Single machine two-stage scroll compressor is the single machine two-stage scroll compressor of a 60HP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655874.3A CN110260560A (en) | 2019-07-19 | 2019-07-19 | A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910655874.3A CN110260560A (en) | 2019-07-19 | 2019-07-19 | A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110260560A true CN110260560A (en) | 2019-09-20 |
Family
ID=67927263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910655874.3A Pending CN110260560A (en) | 2019-07-19 | 2019-07-19 | A kind of high-power single machine two-stage vortex ultra-low temperature air source heat pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483501A (en) * | 2021-06-10 | 2021-10-08 | 北京金茂绿建科技有限公司 | Vortex type air source heat pump system |
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| CN208901671U (en) * | 2018-09-03 | 2019-05-24 | 合肥天鹅制冷科技有限公司 | A kind of low-temperature air source heat pump unit |
| CN210292433U (en) * | 2019-07-19 | 2020-04-10 | 北京金茂绿建科技有限公司 | High-power single-machine two-stage vortex type ultralow-temperature air source heat pump |
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| CN102679609A (en) * | 2012-06-07 | 2012-09-19 | 四川同达博尔置业有限公司 | Air-cooled heat pump air conditioner |
| US20160334143A1 (en) * | 2015-05-12 | 2016-11-17 | Shanghai Ocean University | Switchable two-stage and cascade marine energy-saving ultralow-temperature refrigeration system |
| WO2017063321A1 (en) * | 2015-10-13 | 2017-04-20 | 东南大学 | Air source heat pump spray defrosting device based on super-hydrophobic finned tube heat exchanger |
| CN107559192A (en) * | 2017-10-09 | 2018-01-09 | 合肥圣三松冷热技术有限公司 | A kind of compressor of twin-stage turbulent structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483501A (en) * | 2021-06-10 | 2021-10-08 | 北京金茂绿建科技有限公司 | Vortex type air source heat pump system |
| CN113483501B (en) * | 2021-06-10 | 2023-01-17 | 北京金茂绿建科技有限公司 | Vortex type air source heat pump system |
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