CN103292510A - Automobile air conditioning system - Google Patents
Automobile air conditioning system Download PDFInfo
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- CN103292510A CN103292510A CN2012100420723A CN201210042072A CN103292510A CN 103292510 A CN103292510 A CN 103292510A CN 2012100420723 A CN2012100420723 A CN 2012100420723A CN 201210042072 A CN201210042072 A CN 201210042072A CN 103292510 A CN103292510 A CN 103292510A
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
An automobile air conditioning system comprises a compressor, a gas-liquid separator, a first heat exchanger, a second heat exchanger, a third heat exchanger, at least one throttling element, and a temperature reduction and separating device, wherein a third interface of the temperature reduction and separating device is connected with the inlet of the gas-liquid separator or the compressor; when in a refrigeration mode or heating mode, a throttled refrigerant is subjected to separation of gaseous and liquid refrigerant through the temperature reduction and separating device, and the throttled gaseous refrigerant returns to the gas-liquid separator or the compressor from the third interface of the temperature reduction and separating device; and the liquid refrigerant passing through the temperature reduction and separating device is subjected to further circulation. When the air-conditioning system is in the refrigeration or heating mode, the throttled refrigerant is enabled to pass through the temperature reduction and separating device, the liquid refrigerant after the separation of the temperature reduction and separating device is enabled to participate in following system circulation, so that the refrigerants reaching a next heat exchanger are all liquid refrigerants basically, and the energy efficiency of the automobile air conditioning system is improved.
Description
Technical field
The present invention relates to the automobile air conditioning technology field, particularly the automotive air-conditioning system of a kind of electric automobile air-conditioning system or hybrid power.
Background technology
Along with the development of low-carbon economy, energy-saving and emission-reduction have been proposed stricter requirement, electric automobile becomes one of development of automobile aspect from now on because energy-conserving and environment-protective are arranged.But electric automobile is owing to use battery as power resources, and its air-conditioning system also is different from original automotive air-conditioning system.
Traditional internal combustion engine formula automobile can utilize the waste heat of internal combustion engine and the heat of engine exhaust to come vehicle cabin, and the power of electric automobile mainly comes from motor, and the heat that has lacked engine can utilize, thereby is difficult to reach the heating requirement in winter.In the prior art, for the temperature in the compartment of realizing electric automobile remains on the comfortable temperature of human body sensory, the employing that has multiple mode in the compartment, heat, as adopting independent thermal source, namely utilize the PTC heating; Perhaps utilize fuel heating such as gasoline, kerosene, ethanol; The employing reclaimer waste heat that also has, the auxiliary independent thermal source that adopts again; The employing heat pump that also has guarantees temperature in the compartment etc.Yet, in the above-mentioned various mode of heatings, if adopt independent thermal source, such as: use PTC to heat purely, need to consume the energy of more battery, and then can reduce the distance travelled of automobile; If adopt the fuel heating, not only the efficiency of heating surface is lower, pollutes but also can produce environment, can increase the load of automobile simultaneously.
Adopt the automotive air-conditioning system of heat pump in addition, as shown in figure 13, denomination of invention is that " electric automobile heat-pump air-conditioning system ", application number are 200510027576.8 heat pump type air conditioning system, it is made up of compressor 201, cross valve 202, first check valve 203, internal condensation device 204, F type heating power expansion valve 205, second check valve 206, external condensation device 207, first stop valve 208, second stop valve 209, H type heating power expansion valve 210a, inner evaporator 211a, gas-liquid separator 212a etc.It is provided with refrigeration, heat two kinds of mode of operations, when summer condition, second check valve 206 and first stop valve 208 are closed, heat pump type air conditioning system is kind of refrigeration cycle, its course of work is: compressor 201 consumes certain electric energy, the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP, when flowing through external condensation device 207, emit heat, the refrigerant liberated heat is absorbed by surrounding air, itself undergo phase transition and be condensed into liquid state, liquid refrigerants is when flowing through H type expansion valve 210a, make refrigerant step-down cooling, airborne heat in the absorption chamber when flowing through inner evaporator 211a, itself undergoes phase transition and flashes to gaseous state, and the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP again by compressor 201.And in the winter time during operating mode, first check valve 203 and second stop valve 209 are closed, and system adopts the heating circulation.This system does not possess the mode of operation of complete tide of motorism pump air conditioner system, and how dehumidifying, deice mode do not solve during as vehicle window knot mist, this system is not mentioned when heating isotype yet in addition, if the external condensation device freezes, system can not work, and how to solve; In addition when environment temperature at-5 ℃ and when following, the efficient of its heat pump type air conditioning system is very low, even can't operate as normal.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of automotive air-conditioning system, adopt heat pump, make air-conditioning system under one of them kind pattern of freezing or heating, make refrigerant after the throttling by the cooling separator, make and directly get back to vapour liquid separator or compressor after the separation of gaseous coolant by the cooling separator and carry out next one and circulate, participate in subsequent systemic circulation and make by the liquid refrigerants after the separation of cooling separator, making the refrigerant that arrives next heat exchanger all is liquid refrigerants basically, thereby improves the efficiency of automotive air-conditioning system.For this reason, the present invention is by the following technical solutions:
A kind of automotive air-conditioning system, comprise compressor, be positioned at vapour liquid separator before the compressor inlet, selectively carry out first heat exchanger of heat exchange and second heat exchanger, selectively carry out the 3rd heat exchanger, at least one restricting element of heat exchange with external environment with air in a car compartment, be provided with first control valve in the pipeline before described first heat exchanger, described second heat exchanger is connected with the outlet of described compressor, described automotive air-conditioning system also comprises the cooling separator, and the cooling separator comprises three interfaces; The 3rd interface of cooling separator is connected with the import of described vapour liquid separator or compressor; Described automotive air-conditioning system is when at least a pattern of refrigeration mode or heating mode, make the refrigerant after the throttling carry out the separation of gas, liquid refrigerants by described cooling separator, gaseous coolant is directly got back to described vapour liquid separator or is got back to compressor from the 3rd interface of described cooling separator; And further circulate by the liquid refrigerants of described cooling separator.First control valve can adopt stop valve, pays the utmost attention to the motor-operated control valve of Electromagnetic Control, to realize the needs of control automatically.
Preferably, first interface of described cooling separator is connected to described the 3rd heat exchanger by pipeline or pipeline valve member, and second interface of described cooling separator is connected to described first heat exchanger or second heat exchanger by pipeline or pipeline valve member; With first interface of described cooling separator with or the pipeline that is connected of second interface in be provided with described restricting element.
Preferably, be provided with the first throttle element in the pipeline between first interface of described cooling separator and described the 3rd heat exchanger, be provided with second restricting element in second interface of described cooling separator and the pipeline that described first heat exchanger or second heat exchanger are connected; Be provided with first bypass flow path at the first throttle element, be provided with first check valve in first bypass flow path, first check valve is closed when described the 3rd heat exchanger leads to the direction of the separator of lowering the temperature, then conducting in the time of oppositely; At second restricting element, be arranged in parallel second bypass flow path, second bypass flow path is provided with second check valve, and second check valve is closed then conducting in the time of oppositely at refrigerant when described first heat exchanger or second heat exchanger lead to cooling separator direction; Described first throttle element and second restricting element optionally conducting one of them carry out throttling.
Alternatively, described automotive air-conditioning system comprises second restricting element, in second interface that described second restricting element is arranged on described cooling separator and the pipeline that described first heat exchanger or second heat exchanger are connected; In first interface of described cooling separator and pipeline that described the 3rd heat exchanger is connected, restricting element is not set; Be provided with the 4th control valve in the 3rd interface of described cooling separator and the pipeline that the import of described vapour liquid separator or compressor is connected; When heating mode, the 4th control valve is opened, make the refrigerant after throttling carry out the separation of gaseous coolant and make the liquid refrigerants cooling at the cooling separator, gaseous coolant is directly got back to described vapour liquid separator or is got back to compressor from the 3rd interface of described cooling separator; And under refrigeration mode, the 4th control valve is closed, and the cooling separator does not carry out separation and the cooling of gaseous coolant.
Alternatively, described automotive air-conditioning system comprises the first throttle element, in first interface that described first throttle element is arranged on described cooling separator and the pipeline that described the 3rd heat exchanger is connected; Be provided with the 4th control valve in the 3rd interface of described cooling separator and the pipeline that the import of described vapour liquid separator or compressor is connected; When heating mode, the 4th control valve is closed, and the cooling separator does not carry out separation and the cooling of gaseous coolant; And under refrigeration mode, the 4th control valve is opened, make the refrigerant after throttling carry out the separation of gaseous coolant and make the liquid refrigerants cooling at the cooling separator, gaseous coolant is directly got back to described vapour liquid separator or is got back to compressor from the 3rd interface of described cooling separator.
Alternatively, described automotive air-conditioning system also comprises cross valve, wherein the high-pressure inlet of cross valve is connected with the outlet of described second heat exchanger, the low pressure of cross valve is answered back and is connected with the import of described vapour liquid separator, two other interface of cross valve: the first interface pipeline is connected to described the 3rd heat exchanger, second interface connects described cooling separator by the 3rd control valve, these two interfaces can switch according to the needs of operational mode, when refrigeration mode, the high-pressure inlet of cross valve and the first interface conducting, the conducting and second interface and low pressure are answered back, the 3rd control valve is closed; And when heating mode, the high-pressure inlet of cross valve and the second interface conducting, and the conducting of answering back of first interface and low pressure, the 3rd control valve is opened.
Alternatively, be provided with triple valve in the pipeline after described second heat exchanger, first outlet of triple valve is connected with described the 3rd heat exchanger, reach and connect described vapour liquid separator by second control valve; Second outlet of described triple valve is connected with described first control valve, reaches and the separator pipeline of lowering the temperature is connected or pass through restricting element or bypass flow path is connected with cooling separator pipeline;
Alternatively, be provided with two magnetic valves the pipeline after described second heat exchanger: first magnetic valve, second magnetic valve are controlled respectively from the refrigerant flow that leads to described the 3rd heat exchanger after described second heat exchanger comes out, and from leading to the break-make of the refrigerant flow of described cooling separator after described second heat exchanger comes out, wherein in first magnetic valve and second magnetic valve optionally conducting one of them; First magnetic valve is connected with described the 3rd heat exchanger pipeline, and connect described vapour liquid separator by second control valve; Second magnetic valve is connected with described first control valve, and second magnetic valve is connected or is connected with cooling separator pipeline by restricting element or bypass flow path with cooling separator pipeline simultaneously.
Preferably, described compressor is the compressor that the twin-stage compression function is arranged, and the 3rd interface of described cooling separator is connected with the secondary import of described compressor, and the outlet of described vapour liquid separator is connected with the one-level import of described compressor.
Preferably, described automotive air-conditioning system is when dehumidification mode, the wind that is sent in the compartment is that the first low heat exchanger of process refrigerant temperature dries and then passes through the second high heat exchanger of refrigerant temperature earlier, can select whether to heat at described second heat exchanger system, namely can select whether to heat according to temperature conditions in the compartment, and then wind is delivered in the compartment.
Preferably, described the 3rd heat exchanger also is provided with bypass passageways, and when dehumidification mode, the HTHP refrigerant is by behind second heat exchanger, and can select is by described the 3rd heat exchanger or by described bypass passageways; And whether are described bypass passageways employing stop valve or solenoid control conducting.
Restricting element is paid the utmost attention to electric expansion valve, to increase the accuracy to controlling under every kind of pattern, to improve the comprehensive efficiency of system.
Compared with prior art, the present invention has the following advantages: because when refrigeration mode or heating mode, make refrigerant after throttling, pass through cooling separator 5, on the one hand liquid refrigerants can further be lowered the temperature, and make gaseous coolant directly get back to vapour liquid separator or compressor, the refrigerant of arrival first heat exchanger or the 3rd heat exchanger and the temperature difference of air stream are strengthened, the refrigerant that makes first heat exchanger or the 3rd heat exchanger simultaneously substantially all is liquid refrigerants, heat exchange effect is further improved, thereby the working range that makes this heat pump can obtain to increase, and improves the operational efficiency of heat pump.
In addition, automotive air-conditioning system of the present invention also comprises dehumidification mode and deice mode, control is provided with first heat exchanger and second heat exchanger respectively at the temperature in the compartment in addition, both arrange respectively, and the refrigerant by heat only in second heat exchanger, in first heat exchanger only by cold refrigerant or do not pass through; Can avoid the impact of high low temperature in these two heat exchangers like this, and during dehumidification mode, when unlatching first heat exchanger carries out demist or dehumidifying, can open simultaneously second heat exchanger heat the dehumidifying after air, realize the effect of heating again of dehumidifying simultaneously, guarantee the humiture in the compartment, thereby satisfied the comfort level requirement in the compartment.
Description of drawings
Fig. 1 is the pipeline connection diagram of first kind of specific embodiment of the present invention when refrigeration mode;
Fig. 2 is the pipeline connection diagram of first kind of specific embodiment of the present invention when heating mode;
Fig. 3 is the pipeline connection diagram of first kind of specific embodiment of the present invention when dehumidification mode;
Fig. 4 is the pipeline connection diagram of first kind of specific embodiment of the present invention when deice mode;
Fig. 5 is the schematic diagram that second kind of specific embodiment pipeline of the present invention connects;
Fig. 6 is the schematic diagram that the third specific embodiment pipeline of the present invention connects;
Fig. 7 is the schematic diagram that the 4th kind of specific embodiment pipeline of the present invention connects;
Fig. 8 is the schematic diagram that the 5th kind of specific embodiment pipeline of the present invention connects;
Fig. 9 is the schematic diagram that the 6th kind of specific embodiment pipeline of the present invention connects;
Figure 10 is the schematic diagram that the 7th kind of specific embodiment pipeline of the present invention connects;
Figure 11 is the schematic diagram that the 8th kind of specific embodiment pipeline of the present invention connects;
Figure 12 is the schematic diagram that the 9th kind of specific embodiment pipeline of the present invention connects;
Figure 13 is the schematic diagram that a kind of traditional electric automobile air-conditioning system pipeline connects.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Automotive air-conditioning system of the present invention belongs to heat pump, comprising: refrigeration mode, heating mode, dehumidification mode (or claiming the demist pattern), four kinds of mode of operations of deice mode (or claiming defrosting mode).First kind of specific embodiment of the present invention such as Fig. 1-shown in Figure 4, wherein Fig. 1 is the pipeline connection diagram of first kind of specific embodiment of the present invention when refrigeration mode, Fig. 2 is the pipeline connection diagram of first kind of specific embodiment of the present invention when heating mode, Fig. 3 is the pipeline connection diagram of first kind of specific embodiment of the present invention when dehumidification mode, Fig. 4 is the pipeline connection diagram of first kind of specific embodiment of the present invention when deice mode, and wherein the dotted line among the figure is represented that this place's pipeline cuts off and do not circulated under this pattern.
As shown in the figure, automotive air-conditioning system of the present invention comprises compressor 1, be positioned at the preceding vapour liquid separator 9 of compressor inlet, the 3rd heat exchanger 3 that carries out heat exchange with external environment, first throttle element 4, second restricting element 6, air-conditioning box 100, air-conditioning box 100 be used for regulating in the compartment temperature with or humidity, air-conditioning box 100 comprises first heat exchanger 101, second heat exchanger 102, blower fan 104, temperature air door 105, grid and air channel 109, cycle throttle 106, also be provided with first stop valve 7 before first heat exchanger 101, the outlet of first heat exchanger 101 connects the import of vapour liquid separator 9, and the import of second heat exchanger 102 is connected with compressor outlet; First heat exchanger 101, second heat exchanger 102 are selected to carry out heat supply, cooling or demist to described compartment according to the operating mode demand in the compartment, specifically can be arranged in the compartment, also can be arranged at outside the compartment and blow in the compartment by air supply duct.Be provided with triple valve 2 in the pipeline after second heat exchanger 102, triple valve 2 can adopt the three-way switch valve of machinery control, but pays the utmost attention to the triple valve of Electromagnetic Control, is easy to realize automatic control like this.First stream 210 after first outlet of triple valve 2 leads to the 3rd heat exchanger 3 respectively, reaches second stop valve 8, second stream 220 after second outlet of triple valve 2 leads to the pipeline between first stop valve 7, second restricting element 6, and the outlet of second stop valve 8 is connected to the import of vapour liquid separator 9.There is not cross valve in this embodiment, the high low temperature heat transfer loss when having avoided like this flowing mutually between two runners of high low temperature in the cross valve, and the resistance of fluid when flowing also can reduce relatively; And the input at initial stage is less relatively, and it is convenient relatively to make, and can guarantee the service life of air-conditioning system like this, and manufacturing cost is also relatively low simultaneously.
The air-conditioning system of this embodiment also comprises cooling separator 5, and cooling separator 5 comprises first interface 51, second interface 52 that is connected with second restricting element 6 that are connected with first throttle element 4, is connected to vapour liquid separator 9(or compressor) the 3rd interface 53 of import; First throttle element 4 is arranged in the 3rd heat exchanger 3 and the pipeline of cooling between the separator 5, be provided with first bypass flow path in parallel with first throttle element 4 at first throttle element 4, first bypass flow path is provided with first check valve 12, first check valve 12 is closed when described the 3rd heat exchanger 3 leads to the direction of the separator 5 of lowering the temperature, then conducting in the time of oppositely; At second restricting element 6, be arranged in parallel second bypass flow path, second bypass flow path is provided with second check valve, 13, the second check valves 13 and closes then conducting in the time of oppositely at refrigerant when described first stop valve 7 leads to cooling separator 5 directions; Second restricting element 6 is connected with the pipeline that second bypass flow path and second outlet of first stop valve 7, triple valve 2 are come; Refrigerant can enter cooling separator 5 from first interface 51, second interface 52, and liquid refrigerants flows out from another interface then, and gaseous coolant is got back to compressor from the outflow of the 3rd interface.
When needed to freeze in the car summer, air-conditioning system switched to refrigeration mode.Under refrigeration mode, first stop valve 7 is opened, and second stop valve 8 is closed, and triple valve 2 leads to the first outlet conducting of the 3rd heat exchanger 3, and triple valve 2 leads to second port closing of first stop valve 7, second restricting element, 6 directions.Compressor 1 consumes certain electric energy, and the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP, second heat exchanger 102 and flow to the 3rd heat exchanger 3 by triple valve 2 of flowing through.Under the cooling condensation of cooling air stream B, the HTHP refrigerant is emitted heat and is released in the surrounding air and goes in the 3rd heat exchanger 3, and itself undergoes phase transition and be condensed into liquid state through cooling, or vapour-liquid two-phase mixed state.Liquid refrigerants is after through the 3rd heat exchanger 3, because first check valve, 12 these directions are not conductings, it is the first not conducting of bypass flow path of first throttle element 4, so refrigerant is by 4 throttlings of first throttle element, arrive cooling separator 5 then, at this moment refrigerant is in cooling separator 5, because the 3rd interface 53 of cooling separator 5 is connected to vapour liquid separator 9, and the pressure at vapour liquid separator 9 places is relatively low, get back to vapour liquid separator and compressor so in cooling separator 5, there is the part liquid refrigerants can evaporate with gaseous coolant, thereby make the liquid refrigerants cooling.Separation by cooling separator 5, gaseous coolant is connected to vapour liquid separator 9 by the 3rd interface 53 of cooling separator 5, flow out by second interface 52 of cooling separator 5 liquid refrigerants cooling back, and then second bypass flow path of second restricting element 6 of flowing through, arrive first heat exchanger 101 by first stop valve 7 then, the liquid refrigerants of low-temp low-pressure is in first heat exchanger 101, absorb the heat among the air stream A, refrigerant absorbs and itself to undergo phase transition behind the heat or partly phase transformation and flash to gaseous state, and makes and lower the temperature in the compartment in; Refrigerant arrives vapour liquid separator 9 again, and refrigerant is behind vapour liquid separator 9, and the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP again by compressor 1, so periodic duty.104 pairs of air stream of blower fan A plays the conveying effect.By cool-down dehumidification, through grid and air channel 109, it is indoor to send into car, reduces the indoor temperature of car by first heat exchanger 101 for air stream A, so that comfortable environment by bus to be provided.Air stream A temperature controlling is achieved in that can be as required, by the opening angle of temperature air door 105 determine the to flow through ratio of second heat exchanger 102, the flow through air stream of second heat exchanger 102 of heating mixes with original air stream, and reaches required temperature.Wherein, air stream A is the mixing wind of circulation air port 107 and fresh wind port 108 in flowing through, and mixed proportion can be controlled by cycle throttle 106 by system according to the comfortableness requirement.And circulated air can further be saved power consumption in introducing.In addition, under refrigeration mode, temperature air door 105 apertures that make second heat exchanger 102 are zero, allow the air channel bypass, do not allow wind through second heat exchanger 102.When the gaseous coolant of HTHP comes out from compressor 10, during through second heat exchanger 102, owing to there is not the wind process this moment, so, can not produce heat exchange with air through the refrigerant of second heat exchanger 102.Restricting element can be selected heating power expansion valve or electric expansion valve for use.First stop valve 4 and second stop valve 7 can adopt mechanical stop valve, but preferentially select electromagnetic control type for use, to realize the needs of control automatically.
Because when refrigeration mode, heat generating components such as the battery of electric automobile, motor frequency conversion device are to need certain cooling degree too, for this reason, also can adopt corresponding airduct to introduce corresponding cold wind in the present embodiment from the air channel battery is cooled off.Also a return air inlet can be set in the compartment in addition, be sent to heat generating components such as battery with blowing to cold wind in the compartment again by airduct after through the compartment, with heat generating components such as cool batteries.
When needed heat winter, system switched to heating mode; As shown in Figure 2, at this moment first stop valve 7 is closed, and second stop valve 8 is opened, and triple valve 2 leads to first port closing of the 3rd heat exchanger 3, and triple valve 2 leads to the second outlet conducting of first stop valve 7, cooling separator 5.
Through first interface 51 of cooling separator 5 flow out whole are liquid refrigerants after temperature reduces, arrive the 3rd heat exchanger 3 by first bypass flow path, B carries out heat exchange at the 3rd heat exchanger 3 refrigerants and Cryogenic air stream, absorbs its heat of vaporization and becomes the gaseous coolant of low-temp low-pressure or the refrigerant of gas-liquid two-phase.Like this, because the temperature of liquid refrigerants by cooling separator 5 further reduces, like this, the temperature of refrigerant that arrives the 3rd heat exchanger 3 is also relatively low, the refrigerant that arrives the 3rd heat exchanger 3 and the temperature difference of external environment condition have been increased, thereby make this system from the low temperature environment of lower temperature, absorb heat, realize the function of heat pump.In addition, by the separation of cooling separator 5, arriving the whole of the 3rd heat exchanger is liquid refrigerants, like this, can improve at the 3rd heat exchanger 3 heat exchange effects, and the exchange effect of refrigerant and Cryogenic air stream B also is improved; Refrigerant arrives vapour liquid separator 9 again by second stop valve 8 then, and through the separation of vapour liquid separator 9, liquid refrigerants is stored in the vapour liquid separator 9, and the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP again by compressor 1, so periodic duty.Like this, by cooling separator 5, the refrigerant of arrival the 3rd heat exchanger 3 and the temperature difference of external environment condition are strengthened, the refrigerant that makes the 3rd heat exchanger simultaneously all is liquid refrigerants, heat exchange effect is further improved, thereby the working range that makes this heat pump can obtain to increase, and Energy Efficiency Ratio improves.Similarly, 104 pairs of air stream of blower fan A plays the conveying effect.Air stream A is heated by second heat exchanger 102, and through grid and air channel 109, it is indoor to send into car, increases the indoor temperature of car, and comfortable environment by bus is provided.Wherein, air stream A is the mixing wind of circulation air port 107 and fresh wind port 108 in flowing through, and the mixed proportion system can be controlled by cycle throttle 106 according to the comfortableness requirement.And the ratio of interior circulated air otherwise cause vehicle window knot mist, and circulated air can further be saved power consumption in introducing.If environment temperature is too low, the heating properties deficiency of heat pump, or cause heat pump efficiency lower, or even when causing heat pump to work, can use electric heater 103 auxiliary heating, realize heating function with heat pump.Like this, the working range of this system further strengthens, thereby has enlarged the scope of application of air conditioning for automobiles, particularly in the low cold zone of low temperature.
Be not allow refrigerant pass through first heat exchanger 101 when heating in the automotive air-conditioning system of the present invention, can not carry out heat exchange when the wind that blows out of blower fan 104 is by first heat exchanger 101 like this, carry out heat exchange and directly arrive the second high heat exchanger 102 of refrigerant temperature.
When needs are removed the moisture of air in a car compartment or fog on glass, start dehumidification mode, as shown in Figure 3, first stop valve 7 is opened, second stop valve 8 is closed, triple valve 2 leads to the first outlet conducting of the 3rd heat exchanger 3, and triple valve 2 leads to second port closing of first stop valve 7, second restricting element, 6 directions.Compressor 1 consumes certain electric energy, and the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP, second heat exchanger 102 and flow to the 3rd heat exchanger 3 by triple valve 2 of flowing through.Can select refrigerant whether to carry out heat exchange with air stream in second heat exchanger, 102 systems, namely when temperature is low, can carry out heat exchange with cooling air stream A at second heat exchanger 102, and when temperature is higher relatively, also can not carry out heat exchange at second heat exchanger 102, and be selected at the 3rd heat exchanger and extraneous air carries out heat exchange.
Refrigerant is after through the 3rd heat exchanger 3, because first check valve, 12 these directions are not conductings, first bypass flow path that is first throttle element 4 is not conducting, so refrigerant is by 4 throttlings of first throttle element, so refrigerant is by 4 throttlings of first throttle element, arrive cooling separator 5 then, refrigerant is in cooling separator 5, separation by cooling separator 5, gaseous coolant is connected to vapour liquid separator 9 by the 3rd interface 53 of cooling separator 5, flow out by second interface 52 of cooling separator 5 liquid refrigerants cooling back, and then second bypass flow path of second restricting element 6 of flowing through, arrive first heat exchanger 101 by first stop valve 7 then, here the indoor air of liquid refrigerants and car carries out heat exchange, because temperature is much lower in the relative compartment of surface temperature of first heat exchanger 101, therefore in this process, the dew-point temperature of the air before first heat exchanger 101 is higher than the surface temperature of first heat exchanger 101, so just have moisture condensation and separate out and discharge by the pipeline that arranges on the surface of first heat exchanger 101, the content that has so just reduced the water vapour in the air in a car compartment has namely reduced relative humidity, thereby reaches in the compartment purpose of dehumidifying or demist.The liquid refrigerants of low-temp low-pressure is in first heat exchanger 101, absorb the heat among the air stream A, refrigerant absorbs and itself to undergo phase transition behind the heat or partly phase transformation and flash to gaseous state, refrigerant arrives vapour liquid separator 9 again, refrigerant is behind vapour liquid separator 9, the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP again by compressor 1, so periodic duty.Similarly 104 pairs of air stream of blower fan A plays the conveying effect, and by cool-down dehumidification, through grid and air channel 109, it is indoor to send into car, reduces the indoor temperature of car by first heat exchanger 101 for air stream A, so that comfortable environment by bus to be provided.Air stream A temperature controlling is achieved in that can be as required, by the opening angle of temperature air door 105 determine the to flow through ratio of second heat exchanger 102, the flow through air stream of second heat exchanger 102 of heating mixes with original air stream, and reaches required temperature.Wherein, air stream A is the mixing wind of circulation air port 107 and fresh wind port 108 in flowing through, and mixed proportion can be controlled by cycle throttle 106 by system according to the comfortableness requirement.And circulated air can further be saved power consumption in introducing.In addition, if temperature when higher, temperature air door 105 apertures that also can make second heat exchanger 102 are zero, allow the air channel bypass, do not allow wind through second heat exchanger 102, and make refrigerant carry out heat exchange at the 3rd heat exchanger 3 with the external world; Like this, when the gaseous coolant of HTHP comes out from compressor 10, during through second heat exchanger 102, air door is closed, so, can not produce heat exchange with air through the refrigerant of second heat exchanger 102.And when temperature is low, can make the temperature air door 105 aperture maximums of second heat exchanger 102, allow wind through second heat exchanger 102, make through the dehumidifying after air heat up after, through grid and air channel 109, send on the indoor or vehicle window of car, make the temperature can be simultaneously controlled with humidity, so just the indoor comfort level of car is improved.
Like this during dehumidification mode, the wind that is sent in the compartment is that the first low heat exchanger 101 of process refrigerant temperature dries and then passes through the second high heat exchanger 102 of refrigerant temperature earlier, can select whether to heat at second heat exchanger 102, namely can select whether to heat according to temperature conditions in the compartment, and then wind delivered in the compartment, if temperature is higher, just temperature air door 105 can be closed, make refrigerant not carry out heat exchange at second heat exchanger 102 with air; And temperature is lower, just temperature air door 105 can be opened to a certain degree or standard-sized sheet, makes refrigerant carry out heat exchange at second heat exchanger 102 with air.Like this, guarantee humidity and the temperature in the compartment, namely satisfied the comfort level requirement.When removing fog on glass or steam fast if desired in addition, direct closing temperature air door 105, and by corresponding airduct, directly cold wind is blowed to glass, reach the purpose of removing the glass surface mist fast.
In addition when winter, air-conditioning is in substantially under the heating mode and moves, at this moment the 3rd heat exchanger 3 is for cold scattering, and the outer temperature of some regional car is lower, when ambient temperature is lower than zero degree or during near zero degree, behind heating mode work certain hour, make the 3rd heat exchanger 3 frostings or icing easily, and then influence efficiency even the forfeiture heat dispersion of operation of heat pump, so, need to start deice mode, defrosting mode in other words.Particularly, ruuning situation is as shown in Figure 4 when deice mode for air-conditioning system of the present invention, at this moment, first stop valve 7 is opened, second stop valve 8 is closed, triple valve 2 leads to the first outlet conducting of the 3rd heat exchanger 3, and triple valve 2 leads to second port closing of first stop valve 7, second restricting element, 6 directions, and blower fan 104 cuts out.Compressor 1 consumes certain electric energy, and the gaseous coolant of low-temp low-pressure is compressed into the gaseous coolant of HTHP, second heat exchanger 102 of flowing through.At this moment, blower fan 104 is not worked, so there is not air stream A, heat exchange does not take place at second heat exchanger 102 in the gaseous coolant of HTHP substantially, first stream 210 after the gaseous coolant of HTHP exports by first of triple valve 2 flows to the 3rd heat exchanger 3, emit heat at the 3rd heat exchanger 3, the ice (frost) on the 3rd heat exchanger 3 surfaces is removed rapidly, recover heating performance.Refrigerant itself undergoes phase transition and is condensed into liquid state or partly is condensed into liquid state; Refrigerant is by first throttle element 4 then, because first check valve 12 of first bypass flow path is not conducting during this direction, so refrigerant enters cooling separator 5 by first throttle element 4 backs by first interface 51; Gaseous coolant is just got back to compressor 1 by the 3rd interface 53 of cooling separator 5 by vapour liquid separator 9, restarts next circulation, and so deicing is carried out in periodic duty.And liquid refrigerant is got back to vapour liquid separator 9 by second interface 52 of cooling separator 5 by first stop valve 7, first heat exchanger 101, and be stored in the vapour liquid separator 9, do not carry out heat exchange with the outside substantially at first heat exchanger, 101 liquid refrigerants.
Just begun deicing when deicing finishes at deice mode, the pressure-enthalpy chart of its refrigerant is the process of a dynamic change, when deice mode, liquid refrigerants stays storage at the refrigerant liquid storage space of vapour liquid separator 9, so the capacity requirement of the refrigerant liquid storage space of vapour liquid separator 9 is at the 30-60% of described heat pump coolant injection amount.
Generally speaking, be not carry out heat exchange at second heat exchanger 102, but also can select to carry out heat exchange to guarantee the temperature in the compartment; As wanting quick deicing then not allow second heat exchanger 102 carry out heat exchange, the temperature that arrives the refrigerant of the 3rd heat exchanger 3 like this can be higher, and the time of deicing or frost also just can be shorter.Usually, the time of deice mode operation is all relatively short, generally about 3-4 minute; By the time after deicing finishes, mode of operation can be returned to the heating mode operation.
From four kinds of top mode of operations as can be seen, automotive air-conditioning system of the present invention is provided with first heat exchanger 101 and second heat exchanger 102 respectively at the Temperature and Humidity Control in the compartment, 102 refrigerants by heat of second heat exchanger, and 101 of first heat exchangers pass through the low temperature refrigerant, both arrange respectively, and first heat exchanger 101 and second heat exchanger 102 are the checkers that do not have high low temperature, can avoid the impact of high low temperature in these two heat exchangers, both can design to improve its heat exchange efficiency respectively like this, can avoid simultaneously the impact of high low temperature in these two heat exchangers, can improve service life like this; And during dehumidification mode, air can pass through first heat exchanger 101 and second heat exchanger 102 simultaneously, realizes the effect of heating again of dehumidifying simultaneously, guarantees the humiture in the compartment, thereby satisfies the comfort requirement in the compartment.
Introduce second kind of specific embodiment of the present invention below, Fig. 5 is the pipeline connection diagram of second kind of specific embodiment of the present invention.Present embodiment is a kind of improvement on first kind of specific embodiment in the above, and particularly, compressor is the compressor 10 that the twin-stage compression function is arranged in the present embodiment.Flow through the cooling separator 5 gaseous coolant, the secondary import 10a that directly gets back to compressor 10 by the 3rd interface 53 of cooling separator 5 compresses, rather than all arrive compressor again by vapour liquid separator 9, remaining liquid refrigerants is then similar with top described embodiment, earlier by vapour liquid separator 9 again the one-level import 10b by compressor the overall power that can reduce compressor is set like this to compressor 10, raise the efficiency, save electric energy, thereby improve distance travelled.
Introduce the third specific embodiment of the present invention below, Fig. 6 is the pipeline connection diagram of the third specific embodiment of the present invention.Same present embodiment also is a kind of improvement on first kind of specific embodiment in the above, particularly, present embodiment is provided with a bypass passageways with the 3rd heat exchanger 3, when dehumidification mode, second stop valve 8 that exports to these refrigerant flow 211 break-makes of control between the vapour liquid separator 9 from first of triple valve 2 is closed, the refrigerant of HTHP is by behind the triple valve 2, first outlet by triple valve 2 behind first stream 210, can select by the 3rd heat exchanger 3 carry out heat exchange or by bypass passageways 212 by and do not flow to the 3rd heat exchanger 3; In addition, bypass passageways 212 adopts stop valve or magnetic valve 11 control on-offs.When temperature is low, can select not by the 3rd heat exchanger 3 like this, flow through the 3rd heat exchanger 3 to outdoor heat radiation thereby can reduce because of refrigerant, thereby cause thermal loss, thereby save electric energy, improve distance travelled; Do not flow to the 3rd heat exchanger 3 because of refrigerant in addition, but the bypass passageways of directly flowing through, like this, refrigerant directly passes through from the stream of bypass passageways, can form complete heat pump equally, the pressure loss of refrigerant also can reduce, thereby improves the efficient of system, avoid the waste of the energy, improved the Energy Efficiency Ratio of heat pump.Other three kinds of operational modes can be with reference to first kind of top specific embodiment, just no longer explanation here.
Introduce the 4th kind of specific embodiment of the present invention below, as shown in Figure 7, Fig. 7 is the 4th kind of specific embodiment of the present invention, and compressor is the compressor 10 with twin-stage compression function in the present embodiment; At the 3rd heat exchanger 3, be provided with refrigerant bypass passageways 212 equally simultaneously, and control conducting or the cut-out of bypass passageways 212 with stop valve or magnetic valve 11; And the 3rd interface 53 of gaseous coolant that makes cooling separator 5 is connected to the secondary import 10a of compressor 10, and concrete running and operational mode can no longer be repeated here with reference to top other embodiments and combination thereof.
In several embodiments of introducing above, be to carry out the control of the refrigerant type of flow by triple valve 2 by the refrigerant behind second heat exchanger, triple valve specifically can adopt the control of electromagnetism switching mode, makes its an outlet conducting, another port closing; But the present invention is not limited to this, can also adopt other modes to control, as shown in Figure 8, Fig. 8 is the 5th kind of specific embodiment of the present invention, it adopts two magnetic valves: first magnetic valve 21, second magnetic valve 22 is controlled respectively from leading to refrigerant first stream 210 of the 3rd heat exchanger 3 after second heat exchanger comes out, from leading to refrigerant second stream 220 of the separator 5 of lowering the temperature after second heat exchanger comes out, wherein in first magnetic valve 21 and second magnetic valve 22 optionally conducting one of them, at refrigeration mode, dehumidification mode, during deice mode, make first magnetic valve, 21 conductings of control refrigerant first stream 210, and when heating mode, make second magnetic valve, 22 conductings of control refrigerant second stream 220, can realize purpose of the present invention equally like this, and concrete operational mode can no longer be repeated here with reference to top other embodiments.
In addition, can also adopt cross valve to carry out the control of the refrigerant type of flow, be illustrated in figure 9 as the 6th kind of specific embodiment of the present invention.Adopt a cross valve 25 and the 3rd control valve 14 to substitute triple valve 2 in first embodiment, second stop valve 8, wherein the high-pressure inlet 250 of cross valve 25 is connected with the outlet of second heat exchanger 102, the low pressure of cross valve 25 is answered back and 251 is connected with the import of vapour liquid separator 9, two other interface of cross valve 25: first interface 252, second interface 253 is connected respectively to the 3rd heat exchanger 3, lead to pipeline between first stop valve 7 and second restricting element 6 or second bypass flow path by the 3rd control valve 14, these two interfaces 252,253 can switch according to the needs of operational mode, when refrigeration mode, the 3rd control valve 14 is closed, the high-pressure inlet 250 of cross valve 25 and 252 conductings of first interface, and at this moment 251 conductings of answering back of second interface 253 and low pressure make the refrigerant low-pressure channel by cross valve not of getting back to the low-temp low-pressure before the compressor; And when heating mode, the 3rd control valve 14 is opened, the high-pressure inlet 250 of cross valve 25 and 253 conductings of second interface, and 251 conductings of answering back of first interface 252 and low pressure; When dehumidification mode, the high-pressure inlet 250 of cross valve 25 and 252 conductings of first interface, and 251 conductings of answering back of second interface 253 and low pressure, the 3rd control valve 14 is closed; When deice mode, the high-pressure inlet 250 of cross valve 25 and 252 conductings of first interface, and 251 conductings of answering back of second interface 253 and low pressure, after refrigerant arrives cooling separator 5, gaseous coolant is got back to vapour liquid separator 9 by the 3rd interface 53 of cooling separator 5, flow out by second interface 52 of cooling separator 5 liquid refrigerants cooling back, flow through second bypass flow path of second restricting element 6, get back to vapour liquid separator 9 by the 3rd control valve 14 through the low-pressure channel of cross valve 25 then, and be stored in the vapour liquid separator 9; The import that vapour liquid separator 9 can arrange two diverse locations is connected with gaseous coolant, liquid refrigerants respectively; The type of flow of concrete refrigerant and the method for operation are not described in detail here with reference to top embodiment.
In several embodiments of introducing above, all be under four kinds of mode of operations, all to carry out the separation of gaseous coolant by cooling separator 5, but the present invention is not limited to this, also can be partly to carry out the separation of gaseous coolant, the 7th kind of embodiment as shown in figure 10 by cooling separator 5 under the pattern.This embodiment has reduced some parts with respect to top first embodiment: second restricting element 6, first check valve 12, second check valve 13, be that restricting element has only one: namely the first throttle element 4, increase the break-make of the 4th control valve 17 control from the 3rd interface 53 of cooling separator 5 to the pipeline the vapour liquid separator 9 in addition, the cost of Tou Ruing can reduce like this, and system makes convenient; This embodiment is under refrigeration, dehumidifying, three kinds of operational modes of deicing, and the 4th control valve 17 is opened, and makes refrigerant after the throttling carries out gaseous coolant at cooling separator 5 separation and makes the liquid refrigerants cooling, and concrete running is with reference to top the description; And when heating mode, the 4th control valve 17 is closed, the refrigerant of HTHP comes out from compressor 1, through second interchanger 102, after the interior temperature of vehicle cabin, export to second stream 220 through second of triple valve 2, arrive cooling separator 5, because the refrigerant by cooling separator 5 is the refrigerant of higher temperature without the restricting element throttling but relatively, refrigerant through cooling separator 5 arrives restricting element 4 throttlings by second interface 51, and then emit cold to the 3rd heat exchanger 3, and then get back to vapour liquid separator 9 by second stop valve 8, and get back to compressor 1 and finish a circulation.
In addition, can also be under heating mode, to make refrigerant separate cooling by cooling separator 5, and not separate cooling under other patterns, the 8th kind of specific embodiment as shown in figure 11.This embodiment is opposite on the operational mode with respect to top the 7th embodiment, this embodiment substitutes the restricting element 4 of top the 7th embodiment and has kept second restricting element 6, this embodiment is when heating mode, the 4th control valve 17 is opened, make refrigerant after the throttling carries out gaseous coolant at cooling separator 5 separation and make the liquid refrigerants cooling, concrete running is with reference to top the description; And under refrigeration, dehumidifying, three kinds of operational modes of deicing, the 4th control valve 17 is closed, and cooling separator 5 does not carry out separation and the cooling of gaseous coolant, and concrete running is with reference to top the description.
In addition at the 8th embodiment of introducing above, can also do further improvement, with compressor converted for having the compressor 10 of twin-stage compression function, and the 3rd interface 53 that makes cooling separator 5 is connected to the secondary import of compressor 10, as shown in figure 12, other then the 8th embodiment with shown in Figure 11 is identical.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet is not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations, as embodiment described above being made up or substituting etc.Therefore, every content that does not break away from technical solution of the present invention according to any simple modification, equivalent variations and the modification that technical spirit of the present invention is done above embodiment, all still belongs in the scope of technical solution of the present invention protection.
Claims (10)
1. automotive air-conditioning system, comprise compressor, be positioned at vapour liquid separator before the compressor inlet, selectively carry out first heat exchanger of heat exchange and second heat exchanger, selectively carry out the 3rd heat exchanger, at least one restricting element of heat exchange with external environment with air in a car compartment, be provided with first control valve in the pipeline before described first heat exchanger, described second heat exchanger is connected with the outlet of described compressor, described automotive air-conditioning system also comprises the cooling separator, and the cooling separator comprises three interfaces; The 3rd interface of cooling separator is connected with the import of described vapour liquid separator or compressor; Described automotive air-conditioning system is when at least a pattern of refrigeration mode or heating mode, make the refrigerant after the throttling carry out the separation of gas, liquid refrigerants by described cooling separator, gaseous coolant is directly got back to described vapour liquid separator or is got back to compressor from the 3rd interface of described cooling separator; And further circulate by the liquid refrigerants of described cooling separator.
2. automotive air-conditioning system according to claim 1, it is characterized in that, first interface of described cooling separator is connected to described the 3rd heat exchanger by pipeline or pipeline valve member, and second interface of described cooling separator is connected to described first heat exchanger or second heat exchanger by pipeline or pipeline valve member; With first interface of described cooling separator with or the pipeline that is connected of second interface in be provided with described restricting element.
3. automotive air-conditioning system according to claim 2, it is characterized in that, be provided with the first throttle element in the pipeline between first interface of described cooling separator and described the 3rd heat exchanger, be provided with second restricting element in second interface of described cooling separator and the pipeline that described first heat exchanger or second heat exchanger are connected; Be provided with first bypass flow path at the first throttle element, be provided with first check valve in first bypass flow path, first check valve is closed when described the 3rd heat exchanger leads to the direction of the separator of lowering the temperature, then conducting in the time of oppositely; At second restricting element, be arranged in parallel second bypass flow path, second bypass flow path is provided with second check valve, and second check valve is closed then conducting in the time of oppositely at refrigerant when described first heat exchanger or second heat exchanger lead to cooling separator direction; Described first throttle element and second restricting element optionally conducting one of them carry out throttling.
4. automotive air-conditioning system according to claim 2, it is characterized in that, described automotive air-conditioning system comprises second restricting element, in second interface that described second restricting element is arranged on described cooling separator and the pipeline that described first heat exchanger or second heat exchanger are connected; In first interface of described cooling separator and pipeline that described the 3rd heat exchanger is connected, restricting element is not set; Be provided with the 4th control valve in the 3rd interface of described cooling separator and the pipeline that the import of described vapour liquid separator or compressor is connected; When heating mode, the 4th control valve is opened, make the refrigerant after throttling carry out the separation of gaseous coolant and make the liquid refrigerants cooling at the cooling separator, gaseous coolant is directly got back to described vapour liquid separator or is got back to compressor from the 3rd interface of described cooling separator; And under refrigeration mode, the 4th control valve is closed, and the cooling separator does not carry out separation and the cooling of gaseous coolant.
5. automotive air-conditioning system according to claim 2 is characterized in that, described automotive air-conditioning system comprises the first throttle element, in first interface that described first throttle element is arranged on described cooling separator and the pipeline that described the 3rd heat exchanger is connected; Be provided with the 4th control valve in the 3rd interface of described cooling separator and the pipeline that the import of described vapour liquid separator or compressor is connected; When heating mode, the 4th control valve is closed, and the cooling separator does not carry out separation and the cooling of gaseous coolant; And under refrigeration mode, the 4th control valve is opened, make the refrigerant after throttling carry out the separation of gaseous coolant and make the liquid refrigerants cooling at the cooling separator, gaseous coolant is directly got back to described vapour liquid separator or is got back to compressor from the 3rd interface of described cooling separator.
6. according to claim 1-5 arbitrary described described automotive air-conditioning system wherein, it is characterized in that, described automotive air-conditioning system also comprises cross valve, wherein the high-pressure inlet of cross valve is connected with the outlet of described second heat exchanger, the low pressure of cross valve is answered back and is connected with the import of described vapour liquid separator, two other interface of cross valve: the first interface pipeline is connected to described the 3rd heat exchanger, second interface connects described cooling separator by the 3rd control valve, these two interfaces can switch according to the needs of operational mode, when refrigeration mode, the high-pressure inlet of cross valve and the first interface conducting, the conducting and second interface and low pressure are answered back, the 3rd control valve is closed; And when heating mode, the high-pressure inlet of cross valve and the second interface conducting, and the conducting of answering back of first interface and low pressure, the 3rd control valve is opened.
7. according to claim 1-5 arbitrary described automotive air-conditioning system wherein, it is characterized in that, be provided with triple valve in the pipeline after described second heat exchanger, first outlet of triple valve is connected with described the 3rd heat exchanger, reach and connect described vapour liquid separator by second control valve; Second outlet of described triple valve is connected with described first control valve, reaches and the separator pipeline of lowering the temperature is connected or pass through restricting element or bypass flow path is connected with cooling separator pipeline;
Perhaps, be provided with two magnetic valves the pipeline after described second heat exchanger: first magnetic valve, second magnetic valve are controlled respectively from the refrigerant flow that leads to described the 3rd heat exchanger after described second heat exchanger comes out, and from leading to the break-make of the refrigerant flow of described cooling separator after described second heat exchanger comes out, wherein in first magnetic valve and second magnetic valve optionally conducting one of them; First magnetic valve is connected with described the 3rd heat exchanger pipeline, and connect described vapour liquid separator by second control valve; Second magnetic valve is connected with described first control valve, and second magnetic valve is connected or is connected with cooling separator pipeline by restricting element or bypass flow path with cooling separator pipeline simultaneously.
8. according to claim 1-6 arbitrary described automotive air-conditioning system wherein, it is characterized in that, described compressor is the compressor that the twin-stage compression function is arranged, the 3rd interface of described cooling separator is connected with the secondary import of described compressor, and the outlet of described vapour liquid separator is connected with the one-level import of described compressor.
9. according to the described automotive air-conditioning system of above-mentioned arbitrary claim, it is characterized in that, described automotive air-conditioning system is when dehumidification mode, the wind that is sent in the compartment is that the first low heat exchanger of process refrigerant temperature dries and then passes through the second high heat exchanger of refrigerant temperature earlier, can select whether to heat at described second heat exchanger system, namely can select whether to heat according to temperature conditions in the compartment, and then wind is delivered in the compartment.
10. automotive air-conditioning system according to claim 9, it is characterized in that described the 3rd heat exchanger also is provided with bypass passageways, when dehumidification mode, the HTHP refrigerant is by behind second heat exchanger, and can select is by described the 3rd heat exchanger or by described bypass passageways; And whether are described bypass passageways employing stop valve or solenoid control conducting.
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