CN107650619A - A kind of automotive air-conditioning system of safety and environmental protection - Google Patents
A kind of automotive air-conditioning system of safety and environmental protection Download PDFInfo
- Publication number
- CN107650619A CN107650619A CN201710974962.0A CN201710974962A CN107650619A CN 107650619 A CN107650619 A CN 107650619A CN 201710974962 A CN201710974962 A CN 201710974962A CN 107650619 A CN107650619 A CN 107650619A
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- China
- Prior art keywords
- heat exchanger
- refrigerating medium
- intermediate heat
- compressor
- conditioning system
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00007—Combined heating, ventilating, or cooling devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00321—Heat exchangers for air-conditioning devices
- B60H1/00328—Heat exchangers for air-conditioning devices of the liquid-air type
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses
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- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention discloses a kind of automotive air-conditioning system of safety and environmental protection.The present invention is made up of cooler, expansion valve, Intermediate Heat Exchanger, compressor, refrigerating medium pipeline, main cabin heat exchanger, blower fan；Compressor outlet connects Intermediate Heat Exchanger gas access, Intermediate Heat Exchanger gas vent connection suction port of compressor with expansion valve by cooler；Refrigerating medium pipe in Intermediate Heat Exchanger is connected with the refrigerating medium pipe of main cabin heat exchanger by refrigerating medium pipeline, and the working medium of filling is CO in the air-conditioning system2Or R1234yf, the interior filling nano-fluid refrigerating medium of refrigerating medium pipeline.The achievable refrigerant of the present invention separates with main cabin, and nano-fluid refrigerating medium only is passed through into in-car heat exchanger exchanges heat with passenger cabin air.When refrigerant leaks, will be directly leaked to damage occupant in environment.Therefore, the system has the advantages of safety and environmental protection.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of nano-fluid to do the automotive air-conditioning system of refrigerating medium.
Background technology
By the development in more than 40 years, the technical merit of China's air conditioning for automobiles product is increased substantially very much, but its technology
Content is still below international most advanced level.For the most air conditioning for automobiles applied in the market, the refrigerant of filling is
R134a, its global warming potentiality (GWP) are 1430, and belonging to " high GWP " category, is《The Kyoto Protocol》That is listed should be real
Apply one of greenhouse gases of emission reduction.
With the development of modern economy, national governments pay much attention to environment.The F-gas bills that Europe passed through in 2006
Regulation, the new car to dispatch from the factory in 2017 must not use the refrigerant that GWP is more than 150.In April, 2014, European Union was proposed tightened up F-
Use of the gas regulation limits high GWP refrigerant in refrigeration air-conditioner.Reduce greenhouse gas emission, slowing global warming into
The matter of utmost importance faced for the work of global environmental protection at this stage, world community also accelerate to promote the high GWP of environmentally friendly refrigerant replacement
HFC class refrigerants process.Wherein, CO2The common concern of people is received with R1234yf.
CO2Have many advantages, such as refrigerant：
1) it is environment-friendly, ODP=0, GWP=1；
2) safe and non-toxic non-combustible, chemical property is stable；
3) it is cheap easily to obtain；
4) with the compatibility of lubricating oil；
5) viscosity is low, thermal conductivity factor is high, has good hot physical property and flowing and heat-transfer character；
6) unit volume cooling/heating amount is higher, compared with common working medium, CO2Equipment volume more compact.
But refrigerant is all passed directly to evaporator by orthodox car air-conditioning system is evaporated heat absorption, reduce in cabin
Temperature.However, for CO2Automotive air-conditioning system, when refrigerant leaks, CO2It will be directed into cabin.Work as CO2In cabin
When inside reaching finite concentration, passenger can be caused to suffocate.
The advantages of R1234yf is as refrigerant：
For field of Refrigeration and Air-conditioning, in various candidate's refrigerants, R1234yf GWP only has 4, belongs to " low GWP " refrigeration
The category of agent, meet requirement of the people to refrigerant environment friendly, therefore receive the common concern of people.
When refrigerant R1234yf is leaked, will be directed into cabin.R1234yf belongs to ASHRAE toxicity categories
In A2L level lower toxicity chemical substances, drowsiness and absent minded, dizzy and eyes, skin can be caused upon inhalation
Skin and respiratory system are uncomfortable, and have micro- combustibility, and naked light is met when reaching finite concentration to explode.
Therefore, there is an urgent need to new technology to solve the defects of legacy system and deficiency, to ensure the peace of personnel in cabin
Entirely.
The content of the invention
Even if present invention aims at the CO provided in a kind of evaporator2Or R1234yf is leaked, do not interfere with yet and multiply
The automotive air-conditioning system of objective life security.
The technical solution used in the present invention is：A kind of automotive air-conditioning system of safety and environmental protection is proposed, by cooler, expansion
Valve, Intermediate Heat Exchanger, compressor, refrigerating medium pipeline, main cabin heat exchanger, blower fan composition；Compressor outlet passes through cooler and swollen
Swollen valve connection Intermediate Heat Exchanger gas access, Intermediate Heat Exchanger gas vent connection suction port of compressor；Load in Intermediate Heat Exchanger
Refrigerant tube is connected with the refrigerating medium pipe of main cabin heat exchanger by refrigerating medium pipeline, and the working medium of filling is CO in the air-conditioning system2
Or R1234yf, the interior filling nano-fluid refrigerating medium of refrigerating medium pipeline.
Intermediate Heat Exchanger uses adverse current type double pipe heat exchanger.
The CO of low-temp low-pressure2Or R1234yf steam enters compressor air suction mouth, faced by compressor compresses to HTHP is super
Boundary's fluid, is exchanged heat into gas cooler and surrounding air, a little higher than environment temperature of refrigerant temperature now, through celebrating a festival
It is changed into the gas-liquid two-phase fluid of low-temp low-pressure after stream valve expansion throttling, is exchanged heat by double pipe heat exchanger and refrigerating medium, and it is laggard
Enter compressor, refrigerating medium enters evaporator and absorbs in-car heat, maintains comfortable temperature range in cabin.
Invention has the advantages and positive effects of：
(1) nano particle is added in secondary refrigerant liquid working medium, is remarkably improved the heat transfer property of working medium, its main cause
There is following aspect：
1) nano particle is added in a liquid, adds the surface area and thermal capacity of liquid；
2) nano particle is added in a liquid, adds the effective thermal conductivity of liquid；
3) due to particle and particle, particle and liquid, particle and wall interphase interaction and collision so that liquid cross-sectional temperature
Degree distribution is flat, reduces laminar sublayer, enhances flow turbulence intensity, enhances the energy transmission mistake inside nano-fluid
Journey.
(2) a kind of adverse current type double pipe heat exchanger is used, its is simple in construction, and heat transfer area increases and decreases freely, and two side liquids are equal
Flow velocity can be improved, makes the both sides of heat-transfer area have higher heat transfer coefficient, therefore, its heat-transfer effect is good.
(3) the system can realize that refrigerant separates with main cabin, and nano-fluid refrigerating medium only is passed through into in-car heat exchanger and visitor
Cabin air heat-exchange.When refrigerant leaks, will be directly leaked to damage occupant in environment.Therefore,
The system has the advantages of safety and environmental protection.
(4) novel refrigerant R1234yf, the thermophysical property of the refrigerant is close to R22, and environmental performance is good, ODP values
It is zero, GWP value is only 4, much smaller than the GWP value 1430 of now widely used refrigerant R134a, and can directly be substituted
R134a automotive air-conditioning systems.
Brief description of the drawings
Fig. 1 is the system schematic of the present invention
Embodiment
For that can further appreciate that present disclosure, feature and effect, accompanying drawing describes in detail as follows：It is referring to Fig. 1, a kind of
The automotive air-conditioning system of safety and environmental protection, by cooler 1, expansion valve 2, Intermediate Heat Exchanger 3, compressor 4, refrigerating medium pipeline 5, main cabin
Heat exchanger 6, blower fan 7 form；The outlet of compressor 4 connects the gas access of Intermediate Heat Exchanger 3 by cooler 1 and expansion valve 2, middle
The gas vent of heat exchanger 3 connects the entrance of compressor 4；The refrigerating medium pipe of refrigerating medium pipe and main cabin heat exchanger 6 in Intermediate Heat Exchanger 3
Connected by refrigerating medium pipeline 5, the working medium of filling is CO in the air-conditioning system2Or R1234yf, the interior filling of refrigerating medium pipeline are received
Meter Liu Ti refrigerating mediums.
Detailed schematic is as follows：
1)CO2As refrigerant：Heat in main cabin is transferred to by refrigerant CO by refrigerating medium2, and then pass through CO2System
Cooling system is transferred to atmospheric environment, so as to reduce the temperature of in-car.The present invention uses nano-fluid as refrigerating medium, by CO2System
Cooling system is connected with cabin environment by the indirect heat exchange of refrigerating medium, and then controls temperature in cabin, to reach safety collar
The purpose of guarantor.
The first step：The CO for the low-temp low-pressure that compressor 4 is sucked at heat exchanger exit2Gas, compress it into HTHP
Gas.
Second step：The supercritical CO of HTHP2Fluid enters gas cooler 1, discharges substantial amounts of heat, CO2Temperature drops
It is low, but a little higher than environment temperature of temperature.
3rd step：High pressure CO2The reducing pressure by regulating flow of fluid flows through expansion valve 2, is changed into gas-liquid two-phase state.
4th step；The CO of gas-liquid two-phase2Fluid is warm in the internal affairs genealogy of law of Intermediate Heat Exchanger 3, eventually became hot gas and enters pressure
Contracting machine 4.CO2The heat of nano-fluid refrigerating medium is absorbed during evaporative phase-change, the temperature of refrigerating medium reduces.
5th step：The relatively low nano-fluid refrigerating medium of temperature flows into main cabin heat exchanger 6, makes air and refrigerating by fan 7
Forced convertion occurs for agent, and the air after cooling is sent into main cabin.
6th step：Temperature raises after nano-fluid refrigerating medium absorbs heat, drains into heat after flowing into Intermediate Heat Exchanger 3
CO2Fluid, temperature reduce, and then flow into main cabin heat exchanger 6, such iterative cycles.
2) R1234yf is as refrigerant：Using circulating for R1234yf refrigerants, phase occurs in flow process
Change, condenses in enging cabin, is liquid by air pressure change, releases heat；Evaporator inner refrigerant be evaporated to steam state, this
Individual process absorbs heat, so as to reduce the temperature of in-car.The present invention reaches the mesh of temperature in control cabin based on refrigerating medium is utilized
, refrigerant is completely isolated with main cabin, even if refrigerant leaks, can be immediately discharged to external environment, be not in leak to main cabin
The danger of asphyxia or combustion explosion is inside caused, to ensure the personal safety of passenger.The operation principle of refrigeration system is：
The first step：Compression process, the refrigerant gas for the low-temp low-pressure that compressor is sucked at heat exchanger exit, compresses it
Gas into HTHP discharges compressor.
Second step：Condensation process, the superheated refrigerant gas of HTHP enter condenser, and heat is carried out with surrounding air
Exchange, refrigerant gas is condensed into supercooled liquid, and discharges substantial amounts of heat.
3rd step：Throttling process, refrigerant supercooled liquid become big by volume after expansion gear, pressure and temperature drastically under
Drop, expansion gear is discharged with the state of gas-liquid two-phase.
4th step；Refrigerating process, in Intermediate Heat Exchanger, discharge the gas-liquid two-phase cold-producing medium of the low-temp low-pressure of expansion gear
The carry out heat exchange with nano-fluid refrigerating medium is flowed through, the temperature of nano-fluid reduces.
5th step：Endothermic process, nano-fluid refrigerating medium enter main cabin heat exchanger by refrigerating medium pipeline, and fans drive is empty
Gas is constantly cooled down between the fin of evaporator, and air after cooling is sent in main cabin.
6th step：Outflow evaporator refrigerant evaporation endothermic became hot gas, was drawn into compressor again, repeatedly so
Circulation.
Although the preferred embodiments of the present invention are described above in conjunction with accompanying drawing, the invention is not limited in upper
The embodiment stated, above-mentioned embodiment is only schematical, be not it is restricted, this area it is common
Technical staff in the case of present inventive concept and scope of the claimed protection is not departed from, may be used also under the enlightenment of the present invention
By make it is many in the form of, these are belonged within protection scope of the present invention.
Claims (2)
1. a kind of automotive air-conditioning system of safety and environmental protection, it is characterized in that, by cooler, expansion valve, Intermediate Heat Exchanger, compressor,
Refrigerating medium pipeline, main cabin heat exchanger, blower fan composition；Compressor outlet connects Intermediate Heat Exchanger gas with expansion valve by cooler
Entrance, Intermediate Heat Exchanger gas vent connection suction port of compressor；The load of refrigerating medium pipe and main cabin heat exchanger in Intermediate Heat Exchanger
Refrigerant tube is connected by refrigerating medium pipeline, and the working medium of filling is CO in the air-conditioning system2Or R1234yf, in refrigerating medium pipeline
Fill nano-fluid refrigerating medium.
2. the automotive air-conditioning system of safety and environmental protection according to claim 1, it is characterized in that, Intermediate Heat Exchanger uses adverse current type
Double pipe heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710974962.0A CN107650619A (en) | 2017-10-19 | 2017-10-19 | A kind of automotive air-conditioning system of safety and environmental protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710974962.0A CN107650619A (en) | 2017-10-19 | 2017-10-19 | A kind of automotive air-conditioning system of safety and environmental protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107650619A true CN107650619A (en) | 2018-02-02 |
Family
ID=61119053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710974962.0A Pending CN107650619A (en) | 2017-10-19 | 2017-10-19 | A kind of automotive air-conditioning system of safety and environmental protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107650619A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437744A (en) * | 2018-04-18 | 2018-08-24 | 上海理工大学 | Secondary circuit automotive air-conditioning system based on R1234yf refrigerants |
| CN108548447A (en) * | 2018-05-08 | 2018-09-18 | 哈尔滨理工大学 | A kind of nano-fluid is the circulating heat exchange system of cooling working medium |
| CN112550722A (en) * | 2020-12-10 | 2021-03-26 | 南京航空航天大学 | Airborne heating and cooling system reinforced by nano particles |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067505A (en) * | 2007-06-14 | 2007-11-07 | 上海交通大学 | Air conditioner device for mixed power vehicle |
| US20110056231A1 (en) * | 2008-04-30 | 2011-03-10 | Shunji Komatsu | Refrigeration circuit |
| CN104315633A (en) * | 2014-10-21 | 2015-01-28 | 东南大学 | Water chiller unit, operating method and refrigerant for air-conditioner refrigeration field |
| US20160129756A1 (en) * | 2013-06-18 | 2016-05-12 | Denso Corporation | Vehicular heat management system |
| CN207496420U (en) * | 2017-10-19 | 2018-06-15 | 天津商业大学 | A kind of automotive air-conditioning system of safety and environmental protection |
-
2017
- 2017-10-19 CN CN201710974962.0A patent/CN107650619A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101067505A (en) * | 2007-06-14 | 2007-11-07 | 上海交通大学 | Air conditioner device for mixed power vehicle |
| US20110056231A1 (en) * | 2008-04-30 | 2011-03-10 | Shunji Komatsu | Refrigeration circuit |
| US20160129756A1 (en) * | 2013-06-18 | 2016-05-12 | Denso Corporation | Vehicular heat management system |
| CN104315633A (en) * | 2014-10-21 | 2015-01-28 | 东南大学 | Water chiller unit, operating method and refrigerant for air-conditioner refrigeration field |
| CN207496420U (en) * | 2017-10-19 | 2018-06-15 | 天津商业大学 | A kind of automotive air-conditioning system of safety and environmental protection |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108437744A (en) * | 2018-04-18 | 2018-08-24 | 上海理工大学 | Secondary circuit automotive air-conditioning system based on R1234yf refrigerants |
| CN108548447A (en) * | 2018-05-08 | 2018-09-18 | 哈尔滨理工大学 | A kind of nano-fluid is the circulating heat exchange system of cooling working medium |
| CN112550722A (en) * | 2020-12-10 | 2021-03-26 | 南京航空航天大学 | Airborne heating and cooling system reinforced by nano particles |
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