CN101358779A - Carbon dioxide air conditioning system for vehicle - Google Patents
Carbon dioxide air conditioning system for vehicle Download PDFInfo
- Publication number
- CN101358779A CN101358779A CNA2008102004355A CN200810200435A CN101358779A CN 101358779 A CN101358779 A CN 101358779A CN A2008102004355 A CNA2008102004355 A CN A2008102004355A CN 200810200435 A CN200810200435 A CN 200810200435A CN 101358779 A CN101358779 A CN 101358779A
- Authority
- CN
- China
- Prior art keywords
- gas
- liquid separator
- choke valve
- outlet
- air conditioning
- 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.)
- Pending
Links
Images
Landscapes
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention relates to a carbon dioxide air conditioning system that is applied to the vehicle, and belongs to the technical field of the automobile air conditioning technology, and comprises an evaporator, a gas-liquid separator, an intermediate heat exchanger, a compressor, a gas cooler and a throttling valve. The small-sized gas-liquid separator is arranged between the outlet of the throttling valve and the inlet of the evaporator, so that the gas-liquid separator can separate the gas in the refrigeration agent that is filled into the evaporator, and only the liquid refrigeration agent enters into the evaporator; therefore, the heat conduction area of the evaporator is more effectively used, and the refrigeration efficiency of the system is improved; in addition, a bypass safety valve is paralleled to the throttling valve, when the system running pressure is higher than the safety valve, the bypass safety valve is opened, so that the refrigeration agent liquid does not flows through the throttling valve to be throttled, but directly flows through the small gas-liquid separator to enter into the evaporator, thereby reducing the running pressure of the system so as to guarantee the safety operation of the system.
Description
Technical field
The present invention relates to a kind of air conditioning system for vehicle, specifically is a kind of carbon dioxide air conditioning system for vehicle, belongs to the automobile air conditioning technology field.
Background technology
Air conditioning system for vehicle mainly uses R134a working medium at present.Along with the attention of the whole world to environmental protection problem, R134a by New Refrigerating working medium substitute be trend institute to.European Union forbids producing the R134a new model after clear and definite 1 day January in 2011, and requires manufacturer's recovery system cold-producing medium.On September 6th, 2007, the clearly selected carbon dioxide (R744) of German automobiles TIA (VDA) is as the substitute of R134a.
Carbon dioxide is very friendly to environment, yet because the compression ratio of carbon dioxide refrigeration circulation is higher, and its high-pressure side generally all is supercriticality, and the high-temperature high-pressure refrigerant gas of compressor outlet can not be condensed into liquid state, so the refrigerating efficiency of whole circulation is lower.Promoted widely in order to make the carbon dioxide refrigeration circulation, relevant experts and scholars have found the approach that improves carbon dioxide refrigeration circulation cooling effectiveness by research constantly, for example set up the design of intermediate heat exchanger, high jump compressor rotary speed, optimization system etc. in system.
The Another reason of the development of restriction carbon dioxide refrigeration circulation is that its system's operating pressure is higher, and normal operating pressure reaches about 12MPa, and this resistance to pressure and other performance demands to the system zero parts is higher.For the automotive air-conditioning system that adopts the fixed displacement compressor, because the compressor of automotive air-conditioning system is driven by automobile engine, therefore the rotating speed of engine can influence the rotating speed of compressor of air conditioner, thereby make that the operating pressure fluctuation of whole system is bigger, special improve suddenly when rotating speed of automobile engine, make compressor rotary speed rise to 3000 when turning left the right side, the throttling upstream pressure will reach 30MPa, if this moment, engine speed continued to improve, air-conditioning system will face the danger of explosion.
Find through literature search prior art, the Chinese patent publication number is CN101012979A, the patent of invention name is called: cooling device, this technology proposes a kind of cooling device that uses carbon dioxide as cold-producing medium, in order when preventing the unusual rising of system high pressure lateral pressure, to improve system effectiveness, control device in this technology can be according to the rotating speed of being controlled compressor by the detected temperature that is used for the air of refrigerating gas cooler of sensor, when cooling air temperature is higher, control device just improves the maximum speed of compressor, with the refrigerant flow in the increase system, thereby avoid high side pressure to raise unusually; When cooling air temperature was low, control device just reduced the maximum speed of compressor, to guarantee the cooling effectiveness of system.This technology is when avoiding the unusual rising of refrigeration system high pressure lateral pressure, and the assurance system is in the state of greater efficiency operation always, but the control device of this system is comparatively complicated, and the sensitivity of temperature sensor is had relatively high expectations.
Summary of the invention
In order to address the above problem, the present invention has designed a kind of carbon dioxide air conditioning system for vehicle, on the basis of existing carbon dioxide air conditioning system, improve, the refrigerating efficiency of whole system is further enhanced, simultaneously also can the unexpected potential safety hazard that raises and caused of resolution system operating pressure.
The present invention realizes by following technical scheme.The present invention includes evaporimeter, gas-liquid separator, intermediate heat exchanger, compressor, gas cooler, choke valve and small-sized gas-liquid separator.Small-sized gas-liquid separator is arranged between the import of the outlet of choke valve and evaporimeter, and choke valve next door full by-pass relief valve in parallel.
Described gas-liquid separator is arranged between the side-entrance of evaporator outlet and intermediate heat exchanger, the effect of gas-liquid separator is the small amount of liquid in the evaporator outlet cold-producing medium to be separated accumulate in its bottom space, to avoid entering the liquid hit phenomenon that compressor causes because of refrigerant liquid; Gas-liquid separator also has the effect of regulating refrigerant flow in addition, when cooling load increases, the refrigerant pressure that enters gas-liquid separator from evaporator outlet reduces, the cold-producing medium that accumulates in its bottom will evaporate, enter the flow of the refrigerant gas of compressor with increase, thereby play the purpose of regulating refrigerant flow.
One side-entrance of described Intermediate Heat Exchanger links to each other with the outlet of gas-liquid separator, the outlet of homonymy is connected with compressor inlet, import links to each other with choke valve with the gas cooler outlet respectively in the import and export of its opposite side, the effect of intermediate heat exchanger is to make the low-temperature low-pressure refrigerant of the high-temperature high-pressure refrigerant of gas cooler outlet and gas-liquid separator outlet carry out exchange heat, thereby reach the degree of supercooling that increases the refrigerant liquid that enters choke valve, improve the purpose of the degree of superheat of the refrigerant gas that enters compressor simultaneously.
Described small-sized gas-liquid separator has liquid outlet and gas vent, and its import links to each other with the choke valve outlet, and the liquid outlet end is communicated with evaporator, and gas outlet end is communicated with the gas-liquid separator entrance point.The effect of small-sized gas-liquid separator is that a small amount of gas that enters in the cold-producing medium of evaporimeter is separated, only make liquid refrigerant enter evaporimeter, this obtains more effectively utilizing with regard to the heat transfer area that makes evaporimeter, and the gas of separating enters gas-liquid separator with the cold-producing medium of evaporator outlet.
Described choke valve next door is parallel with full by-pass relief valve, its effect is to be in opening when system's operating pressure is higher than safety value, so that the refrigerant liquid of gas cooler outlet is without the choke valve throttling, but directly enter evaporimeter by small-sized gas-liquid separator, thereby the operating pressure of system is reduced, when operating pressure is reduced to safety value when following, this full by-pass relief valve is closed, and enters small-sized gas-liquid separator again after the refrigerant liquid process choke valve throttling of gas cooler outlet this moment.
Described full by-pass relief valve and choke valve also can replace with a choke valve that carries bypass flow channel, when system normally moves, this choke valve is in the next door of throttling runner bypass flow channel in parallel, when system's operating pressure is lower than safety value, its bypass flow channel is closed, and promptly cold-producing medium is carried out the throttling step-down; And when its inlet side pressure was higher than safety value, its bypass flow channel was opened, and so that cold-producing medium is played bypass, when its inlet side pressure dropped to normal value, its bypass flow channel just can be closed.
The invention has the beneficial effects as follows: the one, by between choke valve outlet and evaporator, small-sized gas-liquid separator being set, making the cold-producing medium that enters evaporimeter be liquid, thereby make the heat transfer area of evaporimeter obtain more effectively utilizing; The 2nd, the kind of refrigeration cycle among the present invention adopts full by-pass relief valve or carries the choke valve of bypass flow channel, it is in opening when system pressure is higher than safety value, carry out bypass with cold-producing medium, thereby reduce the operating pressure of system, guarantee safe operation the choke valve of flowing through.
Description of drawings
Fig. 1 is structure of the present invention and kind of refrigeration cycle process schematic diagram.
The specific embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
As shown in Figure 1, the present invention includes evaporimeter 1, gas-liquid separator 2, intermediate heat exchanger 3, compressor 4, gas cooler 5, choke valve 6, small-sized gas-liquid separator 7.Gas-liquid separator 2 is arranged between the side-entrance of evaporimeter 1 outlet and intermediate heat exchanger 3; Two side-entrances of Intermediate Heat Exchanger 3 export with gas cooler 5 with the outlet of gas-liquid separator 2 respectively and link to each other, and 6 imports link to each other with choke valve with compressor 4 imports respectively in the outlet of its both sides; The import of small-sized gas-liquid separator 7 links to each other with choke valve 6 outlets, and its refrigerant liquid port of export is communicated with evaporimeter 1 import, and its refrigerant gas port of export is communicated with gas-liquid separator 2 entrance points.Choke valve 6 next doors are parallel with full by-pass relief valve 8.
The kind of refrigeration cycle process that carbon dioxide air conditioning system for vehicle described in the present invention is realized as shown in Figure 1, evaporimeter 1 is the equipment of output cold, its tube refrigerant is absorbed in the heat of the outer air in a car compartment that flows of its pipe, compartment air temperature is reduced, and enter gas-liquid separator 2 after the tube refrigerant heat absorption evaporation; The effect of gas-liquid separator 2 is the small amount of drop in the cold-producing medium of evaporator outlet to be separated be stored in its bottom, and gaseous refrigerant enters a side-entrance of intermediate heat exchanger 3, carries out entering the compressor 4 after discharging with side outlet after the exchange heat being compressed; The high-pressure gaseous refrigerant of compressor 4 outlet enters the opposite side import that gas cooler 5 is cooled and enters intermediate heat exchanger 3 after the step-down, carries out after the exchange heat entering choke valve 6 after discharge with side outlet and carries out the throttling step-down; Cold-producing medium through the throttling step-down enters small-sized gas-liquid separator 7, its effect is that a small amount of gaseous refrigerant in the cold-producing medium after the throttling is separated, the gaseous refrigerant of separating enters in the inlet ductwork of gas-liquid separator 2 by connecting line, and liquid refrigerant enters the heat of the outer air in a car compartment that flows of absorption tube in the evaporimeter 1 and evaporates; So just finished whole kind of refrigeration cycle process.
Be located at small-sized gas-liquid separator 7 between choke valve 6 outlet and evaporimeter 1 import described in the present invention, the a small amount of gas that enters in the cold-producing medium of evaporimeter 1 can be separated, only make liquid refrigerant enter evaporimeter 1, thereby make the heat transfer area of evaporimeter 1 obtain more effectively utilizing, the efficient of kind of refrigeration cycle is improved.
Full by-pass relief valve 8 described in the present invention can be in opening when system's operating pressure is higher than safety value, the cold-producing medium that makes gas cooler 5 outlets is without choke valve 6 throttlings, but directly enter evaporimeter 1 by small-sized gas-liquid separator 7, thereby the operating pressure of system is reduced, when operating pressure is reduced to safety value when following, this full by-pass relief valve 8 is closed, and enters small-sized gas-liquid separator 7 after refrigerant liquid process choke valve 6 throttlings of gas cooler 5 outlets this moment and circulates normally.
Full by-pass relief valve 8 described in the present invention and choke valve 6 also can replace with a choke valve that carries bypass flow channel, and this choke valve is in the next door of throttling runner bypass flow channel in parallel, and when system's operating pressure was lower than safety value, its bypass flow channel was closed; And when its inlet side pressure was higher than safety value, its bypass flow channel was opened, and so that cold-producing medium is played bypass action, when its inlet side pressure dropped to normal value, its bypass flow channel just can be closed.
Claims (4)
1. carbon dioxide air conditioning system for vehicle, comprise evaporimeter (1), gas-liquid separator (2), intermediate heat exchanger (3), compressor (4), gas cooler (5), choke valve (6), it is characterized in that also comprising small-sized gas-liquid separator (7), described small-sized gas-liquid separator (7) is arranged between the import of the outlet of choke valve (6) and evaporimeter (1), gas-liquid separator (2) is arranged between the side-entrance of evaporimeter (1) outlet and intermediate heat exchanger (3), two side-entrances of Intermediate Heat Exchanger (3) export with gas cooler (5) with the outlet of gas-liquid separator (2) respectively and link to each other, import links to each other with choke valve (6) with compressor (4) import respectively in the outlet of Intermediate Heat Exchanger (3) both sides, and choke valve (6) next door is parallel with full by-pass relief valve (8).
2. a kind of carbon dioxide air conditioning system for vehicle according to claim 1, it is characterized in that described full by-pass relief valve (8) is in opening when system's operating pressure is higher than safety value, thereby the cold-producing medium that makes gas cooler (5) outlet is without choke valve (6) throttling, but directly enter evaporimeter (1), thereby the operating pressure of system is reduced by small-sized gas-liquid separator; When operating pressure is reduced to safety value when following, this full by-pass relief valve (8) is closed, and the cold-producing medium of gas cooler this moment (5) outlet enters small-sized gas-liquid separator (7) again after through choke valve (6) throttling and carries out normal cyclic process.
3. a kind of carbon dioxide air conditioning system for vehicle according to claim 1, it is characterized in that described choke valve (6) and full by-pass relief valve (8) replace with a choke valve that carries bypass flow channel, the inside of this choke valve is in the next door of throttling runner bypass flow channel in parallel, when system's operating pressure is lower than safety value, its bypass flow channel is closed, and this moment, this choke valve carried out the throttling step-down to cold-producing medium; And when its inlet side pressure was higher than safety value, its bypass flow channel was opened, and so that cold-producing medium is played bypass action, when its inlet side pressure dropped to normal value, its bypass flow channel just can be closed.
4. a kind of carbon dioxide air conditioning system for vehicle according to claim 1, it is characterized in that described small-sized gas-liquid separator (7) has an import and two outlets, its import links to each other with choke valve (6) outlet, its refrigerant liquid port of export is communicated with evaporimeter (1) import, and its refrigerant gas port of export is communicated with gas-liquid separator (2) entrance point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102004355A CN101358779A (en) | 2008-09-25 | 2008-09-25 | Carbon dioxide air conditioning system for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102004355A CN101358779A (en) | 2008-09-25 | 2008-09-25 | Carbon dioxide air conditioning system for vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101358779A true CN101358779A (en) | 2009-02-04 |
Family
ID=40331301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102004355A Pending CN101358779A (en) | 2008-09-25 | 2008-09-25 | Carbon dioxide air conditioning system for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101358779A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968241A (en) * | 2010-09-30 | 2011-02-09 | 广东美的电器股份有限公司 | Air-conditioner using combustible refrigerant and control method thereof |
| CN102422093A (en) * | 2009-05-12 | 2012-04-18 | 三菱电机株式会社 | Air conditioner |
| CN102635926A (en) * | 2012-04-26 | 2012-08-15 | 青岛海尔空调电子有限公司 | Air conditioning system and pressure adjusting method for same |
| CN102644980A (en) * | 2012-05-04 | 2012-08-22 | 上海理工大学 | CO2 hydrate slurry circulating cold accumulation and discharge type automobile air conditioning device |
| CN104169111A (en) * | 2012-03-16 | 2014-11-26 | 丰田自动车株式会社 | Cooling system |
| CN105172523A (en) * | 2015-09-11 | 2015-12-23 | 上海交通大学 | Electric automotive air conditioning system with mutually independent refrigerating cycle and heating cycle |
| CN105485951A (en) * | 2015-12-15 | 2016-04-13 | 昆明东启科技股份有限公司 | Carbon dioxide heat pump system for improving heating efficiency by utilizing gas-liquid two-phase separator |
| CN106440577A (en) * | 2016-12-12 | 2017-02-22 | 远大空调有限公司 | Refrigerant purifying device and purifying method |
| CN109307376A (en) * | 2018-10-09 | 2019-02-05 | 合肥丰蓝电器有限公司 | A kind of high-temperature space supplies colod-application Condensing units |
| WO2022160858A1 (en) * | 2021-09-30 | 2022-08-04 | 江苏徐工工程机械研究院有限公司 | Engineering vehicle and air-conditioning system thereof |
-
2008
- 2008-09-25 CN CNA2008102004355A patent/CN101358779A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102422093A (en) * | 2009-05-12 | 2012-04-18 | 三菱电机株式会社 | Air conditioner |
| CN102422093B (en) * | 2009-05-12 | 2014-03-19 | 三菱电机株式会社 | Air conditioner |
| CN101968241A (en) * | 2010-09-30 | 2011-02-09 | 广东美的电器股份有限公司 | Air-conditioner using combustible refrigerant and control method thereof |
| CN104169111A (en) * | 2012-03-16 | 2014-11-26 | 丰田自动车株式会社 | Cooling system |
| CN102635926B (en) * | 2012-04-26 | 2018-08-24 | 青岛海尔空调电子有限公司 | Air-conditioning system and pressure method of adjustment for air-conditioning system |
| CN102635926A (en) * | 2012-04-26 | 2012-08-15 | 青岛海尔空调电子有限公司 | Air conditioning system and pressure adjusting method for same |
| CN102644980A (en) * | 2012-05-04 | 2012-08-22 | 上海理工大学 | CO2 hydrate slurry circulating cold accumulation and discharge type automobile air conditioning device |
| CN105172523A (en) * | 2015-09-11 | 2015-12-23 | 上海交通大学 | Electric automotive air conditioning system with mutually independent refrigerating cycle and heating cycle |
| CN105172523B (en) * | 2015-09-11 | 2018-06-12 | 上海交通大学 | Refrigeration and heating recycle mutually independent electric automobile air-conditioning system |
| CN105485951A (en) * | 2015-12-15 | 2016-04-13 | 昆明东启科技股份有限公司 | Carbon dioxide heat pump system for improving heating efficiency by utilizing gas-liquid two-phase separator |
| CN106440577A (en) * | 2016-12-12 | 2017-02-22 | 远大空调有限公司 | Refrigerant purifying device and purifying method |
| CN109307376A (en) * | 2018-10-09 | 2019-02-05 | 合肥丰蓝电器有限公司 | A kind of high-temperature space supplies colod-application Condensing units |
| WO2022160858A1 (en) * | 2021-09-30 | 2022-08-04 | 江苏徐工工程机械研究院有限公司 | Engineering vehicle and air-conditioning system thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101358779A (en) | Carbon dioxide air conditioning system for vehicle | |
| US11760162B2 (en) | Thermal management system | |
| CN103090579B (en) | The air conditioner heat pump system of electric automobile | |
| CN110006188B (en) | Electric vehicle battery thermal management and air-conditioning heat pump combined system and control method | |
| CN109269135A (en) | Electric automobile air conditioner heat pump system and electric car including it | |
| CN106274368A (en) | Electric automobile heat-pump air-conditioning system and heat-exchange method thereof | |
| CN101776308A (en) | Energy-saving air conditioner | |
| CN202792326U (en) | Heat pump air-conditioning system of electromobile | |
| CN203298439U (en) | Electro-mobile heat pump air conditioner system with refrigerant charge adjustable | |
| CN105987456A (en) | Multi-connected air conditioning outdoor unit, multi-connected air conditioning system and small load operation control method thereof | |
| CN206953934U (en) | High-efficiency vehicle-mounted air-conditioning system with the cooling of quick step | |
| CN207875334U (en) | A kind of electric automobile air conditioner with battery refrigerating function | |
| CN101476793B (en) | Ultra-high temperature air conditioner cooling cycle system | |
| CN205690755U (en) | Cryogenic refrigerating system finned heat exchanger | |
| CN201363971Y (en) | Energy-efficient air-conditioning device | |
| CN206322818U (en) | A kind of electric vehicle dynamic cell integrated cooling device | |
| CN106585318A (en) | Battery cooling system for electric vehicle | |
| CN206094632U (en) | Air conditioning system and be equipped with this air conditioning system's electric automobile | |
| CN202993698U (en) | Throttling gear of indoor machine and multi-on-line system | |
| CN206155082U (en) | Battery cooling system of electric motor car | |
| CN114294133A (en) | Cooling system, control method, system, device, storage medium and processor thereof | |
| CN113085481A (en) | Air conditioning system, control method of air conditioning system and vehicle | |
| CN211416890U (en) | Heat pump air conditioner and battery heat management device | |
| CN109808448B (en) | Air conditioning system, control method thereof and automobile | |
| CN204478568U (en) | With the Novel vehicular refrigerator cooling cycle system of diffuser pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20090204 |