CN206648507U - A kind of multistage liquid separation plate-type condenser - Google Patents
A kind of multistage liquid separation plate-type condenser Download PDFInfo
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- CN206648507U CN206648507U CN201621234786.4U CN201621234786U CN206648507U CN 206648507 U CN206648507 U CN 206648507U CN 201621234786 U CN201621234786 U CN 201621234786U CN 206648507 U CN206648507 U CN 206648507U
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- liquid separation
- heat exchanger
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Abstract
The utility model discloses a kind of multistage liquid separation plate-type condenser, it includes cover board of front end, rear-end plate, heat exchanger plates, water side seal pad and steam side seal pad, the water side seal pad and steam side seal pad form steam flow channel and cooling water flow conduits positioned at the heat exchanger plates both sides and adjacent heat exchanger plates, cover board of front end or rear-end plate respectively, some liquid separation sealing strips are set in the steam side seal pad, it is described to be communicated with the adjacent heat exchanger plates or cover board of front end side wall composition condensate liquid groove, the condensate liquid groove low side with liquid separation corner apertures.The utility model has the advantage that as follows with advantageous effects：Help to reduce condensing heat-exchange thermal resistance；So that steam maintains condensing heat-exchange under higher mass dryness fraction, the higher coefficient of heat transfer is kept, reaches the purpose for strengthening condensation heat transfer；It is run under optimal liquid separation operating mode, ensure the effect of heat exchanger liquid separation condensation；It is simple in construction, processing cost is reduced, it is compact to maintain Conventional plate-type heat exchanger structure, the advantages of better economy.
Description
【Technical field】
Condenser field is the utility model is related to, more particularly to a kind of multistage liquid separation plate-type condenser.
【Background technology】
Plate type heat exchanger is formed by stacking by a series of corrugated cardboard sheets, forms narrow ditch between plate using gasket seal
Groove runner, cold fluid and hot fluid are respectively enterd by the corner apertures on heat exchanger plates in adjacent runner, and heat is carried out by metal heat-exchange plate
Exchange.Plate type heat exchanger is a kind of good heat-transfer, compact-sized high-performance heat exchanger, in the heat exchange of liquid and liquid medium
Applications are extensive.
The plate type heat exchanger that single-phase " liquid-liquid " conducts heat directly is directly used as into condenser in many occasions to use.Generally deposit
In two shortcomings：When steam corner apertures generally according to liquid flowing come what is designed, vapor ratio volume is big, easily causes flowing velocity
It is excessive, the problem of pressure loss is serious；Second, common " liquid-liquid " heat transfer heat exchanger is to realize single-phase reinforcing by increasing turbulent flow
Heat transfer, and it is heat conduction reinforced to realize by discharging condensation water, reduction thickness of liquid film in time to condense reinforcing needs.
In order to suitable for steam condensing heat-exchange, the improvement at present in existing product and Patents for heat exchange plate is main
It is to be carried out in terms of following two：On the one hand it is by the design to steam corner apertures, increases corner apertures actual internal area, improve flowing
Performance, reduce pressure drop；On the other hand it is the improvement for being related to heat exchanger plates wave mode, in order to drain condensation water, reducer rapidly
Film thickness, improve heat transfer property.
It is general for the YX-80 type condenser heat exchanger plates released of Ban companies of Japan, steam corner apertures shown in below figure 1 and Fig. 2
All over being designed according to the ratio volume of steam, flow behavior is effectively improved.Heat exchange plate uses the plate of two kinds of different ripples
Piece, cooling water stream and steam path are respectively used to, the condensation water for being easy to be formed in condensation process is arranged in time along corrugation grooves
Go out.In recent years, other kinds of plate-type condenser was also only to be confined to be improved size on the basis of original plate.It is such
Heat exchanger in actual applications, generally for ensure steam can total condensation, being commonly designed load can be bigger than normal than actual load,
This will cause condensation water to accumulate in plate type heat exchanger the latter half, and the heat transfer of this part is mainly between condensation water and cooling medium
Without phase-change heat-exchange so that plate-type condenser heat transfer effect deteriorates.Meanwhile the condensation water of accumulation can not exclude in time, increase plate
The flow resistance of formula heat exchanger.Therefore, although can be in time by the film condensation of part only for the Curve guide impeller of plate wave mode
Leakage fluid dram is drained to, but can not solve the problems, such as that condensation water gathers in plate type heat exchanger bottom.
In addition, some existing patents propose some designs for liquid division type plate-type condenser, structure is complex,
Feasibility is relatively low.Meanwhile liquid separation effect can not be guaranteed, easily there is steam breakdown and asked with what condensation water can not exclude in time
Topic.
【Utility model content】
The purpose of this utility model is the deficiency existing for above-mentioned existing plate-type condenser, proposes a kind of multistage liquid separatnig plate
Formula condenser, draw condensation water in time in steam condensation process, reduce film condensation thickness, while strengthening condensation heat transfer,
The problem of condensation water effectively avoided gathers in plate type heat exchanger bottom.
To achieve these goals, the utility model is realized in：A kind of multistage liquid separation plate-type condenser, it includes
Cover board of front end, at least rear-end plate, one piece of heat exchanger plates, at least at least one piece of water side seal pad and one piece of steam side seal pad, institute
State water side seal pad and steam side seal pad respectively positioned at the heat exchanger plates both sides and adjacent heat exchanger plates, cover board of front end or after
End casing forms steam flow channel and cooling water flow conduits, and steam-gas inlet corner apertures, liquid separation corner apertures, cooling water are provided with the heat exchanger plates
Import corner apertures, coolant outlet corner apertures and the cool solidifying midnight liquid corner apertures of final stage；The water side seal pad is provided with coolant outlet angle
Hole, cooling water inlet corner apertures and the through hole being engaged with the liquid separation corner apertures；Some liquid separations are set in the steam side seal pad
Sealing strip, the liquid separation sealing strip and the adjacent heat exchanger plates or cover board of front end side wall composition condensate liquid groove, it is described cold
Lime set groove low side communicates with liquid separation corner apertures.
For the liquid separation sealing strip to be obliquely installed, it with vertical direction angle is in the range of 30~60 ° that its inclination angle, which is,.
The diversion channel slot beneficial to condensation water discharge is provided with the heat exchanger plates.
Import corner apertures is set in the steam side seal pad.
Steam-gas inlet, coolant outlet and grade to n-th grade of liquid level mirror are provided with the cover board of front end；The liquid level mirror
It is separately positioned on the liquid bath position of the liquid separation sealing strip composition.
The rear-end plate sets cooling water inlet, condensation water outlet, the 1st grade to n-th grade liquid separation to export respectively, and
1st grade to n-th grade liquid separation outlet is outside to be provided with conciliation valve, and the is collected to by pipeline from condensation water that valve comes out is reconciled
N levels condensation water exports.
Every grade of heat transfer space need to ensure the heat exchange area of minimum, and its calculation formula is：
In formula：
AI, min--- minimum heat exchange area, m needed for i-stage2；
mi--- into the steam flow of i-stage, kg/s；
xi--- steam quality after i-stage condensation；
R --- steam latent heat, kJ/kg；
Q --- total heat exchange amount, kW；
A --- the total heat exchange area of heat exchanger, m2；
To ensure condensator outlet steam total condensation, afterbody generally has larger heat exchange area.
Compared with prior art, the utility model has the advantage that as follows with advantageous effects：Using counter-flow arrangement, lead to
The Combination Design of sealing gasket and heat exchanger plates is crossed, tilting liquid separation sealing strip is designed on steam side seal pad, is arranged on heat exchanger plates
Condensation water liquid separation corner apertures and guide trough structure, form multistage liquid separation condensation structure.Constantly discharge shape during devaporation
Into condensation water, reduce the thickness of film condensation, help to reduce condensing heat-exchange thermal resistance.Simultaneously so that steam maintains higher
Mass dryness fraction under condensing heat-exchange, keep the higher coefficient of heat transfer, reach the purpose for strengthening condensation heat transfer.Answered for liquid separation condensation is actual
The problem of liquid separation condenser caused by steam breakdown that may be present and condensation water overflow in fails, exports in middle condensation water
Resistance control valve is set on stream, for adjusting the resistance of this grade of condensation water stream.And liquid is set in heat exchanger cover board of front end
Position mirror, can be with the height of real-time monitored condensation water liquid level, and by changing the aperture of valve, adjusts the resistance per fraction liquid stream road
Power, it is run under optimal liquid separation operating mode, ensure the effect of heat exchanger liquid separation condensation.It uses only a kind of heat exchange of structure
Plate, it is simple in construction, processing cost is reduced, it is compact to maintain Conventional plate-type heat exchanger structure, it is possible to achieve liquid separation plate-type condenser
Processing and manufacturing in the industrial production, the advantages of better economy.Meanwhile heat exchanger liquid separation every grade of heat exchange area of sum of series is big
The parameters of structural dimension such as small can optimize design according to actual load, and practical application feasibility is high.
【Brief description of the drawings】
Fig. 1 is that sheet structure schematic diagram is cooled down in existing plate-type condenser；
Fig. 2 is that sheet structure schematic diagram is condensed in existing plate-type condenser；
Fig. 3 is a kind of overall structure solid installation diagram 1 of multistage liquid separation plate-type condenser of the utility model；
Fig. 4 is a kind of overall structure solid installation diagram 2 of multistage liquid separation plate-type condenser of the utility model；
Fig. 5 is the structural representation of rear-end plate in a kind of multistage liquid separation plate-type condenser of the utility model；
Fig. 6 is a kind of structural representation of multistage liquid separation plate-type condenser reclaimed water side seal pad of the utility model；Fig. 7 is
The structural representation of heat exchanger plates in a kind of multistage liquid separation plate-type condenser of the utility model；
Fig. 8 is the structural representation of steam side seal pad in a kind of multistage liquid separation plate-type condenser of the utility model；
The structural representation of cover board of front end in a kind of multistage liquid separation plate-type condenser of Fig. 9 the utility model；
When steam side seal pad in a kind of multistage liquid separation plate-type condenser of Figure 10 the utility model is combined with heat exchanger plates
Structural representation (dotted line flows to for steam, and solid line flows to for condensate liquid)；
Knot when water side seal pad in a kind of multistage liquid separation plate-type condenser of Figure 11 the utility model is combined with heat exchanger plates
Structure schematic diagram (dotted line is cooling current direction)；
Liquid level mirror structural representation in a kind of multistage liquid separation plate-type condenser of Figure 12 the utility model.
【Embodiment】
Explanation is described in detail to the utility model below in conjunction with the drawings and specific embodiments.
A kind of multistage liquid separation plate-type condenser, as shown in figs. 2-11, it includes cover board of front end 2, rear-end plate 1, at least one
Block heat exchanger plates 7, at least at least one piece of water side seal pad 8 and one piece of steam side seal pad 6, the water side seal pad 8 and steam side
Sealing gasket 6 is located at the both sides of heat exchanger plates 7 respectively, forms steam flow channel and cooling water flow conduits.Steaming is provided with the heat exchanger plates 4
The liquid separation corner apertures of 65, the 1st grades to n-th of gas import corner apertures (n be natural number) more than 1 level condensation water, it is cooling water inlet corner apertures, cold
But water out corner apertures and the cool solidifying midnight liquid corner apertures 64 of final stage, wherein liquid separation corner apertures are used for condensation water eductor condenser.The water
Side seal pad 8 is provided with coolant outlet corner apertures 81, cooling water inlet corner apertures 82 and the through hole being engaged with the liquid separation corner apertures,
It primarily serves the effect of runner sealing and different fluid isolation, and the narrow space between two adjacent heat exchanger plates is formed
Cooling water flow conduits.The liquid separation sealing strip and the adjacent heat exchanger plates or cover board of front end side wall composition condensate liquid groove 15,
The diversion channel slot beneficial to condensation water discharge is provided with the heat exchanger plates 7.The heat exchanger plates 7 at the diversion channel slot with setting
It is equipped with diversion groove.
It is close that the steam side seal pad 6 by runner sealing ring and multiple tilting liquid separation sealing strips collectively constitutes an entirety
Seal structure.Import corner apertures 65 is set in the steam side seal pad 6.Wherein runner sealing ring plays the work of isolation cold fluid and hot fluid
With；Tilting liquid separation sealing strip plays a part of stopping condensation water, is connected with runner sealing ring edge, forms condensate liquid groove
15.The number of the liquid separation sealing strip is determined that the angle of inclination of the liquid separation sealing strip is according to practical application by liquid separation series
It is in the range of 30~60 ° that effect, which may be provided at vertical direction angle,.Preferably, the angle of inclination is 45 °, forms condensate liquid
Groove 15 is in optimum position with the liquid formed, and vapor-liquid separation effect is best.Whole steam side seal pad uses high temperature resistant rubber
Glue material is made.Narrow space between steam side seal pad and two neighboring heat exchanger plates 7 forms steam flow channel.Wherein, it is described
Liquid separation sealing strip vertical distance mutual from top to down is increase.Preferably, liquid separation sealing strip phase from top to down
Vertical distance between mutually is increase 1/10 to ten/6ths, can also can play the result of optimization.It is preferred that
, the distance between side wall is less than 1/3rd of whole space length corresponding thereto for the end of the liquid separation sealing strip.
Steam-gas inlet 4 is provided with the cover board of front end 2, (n is the nature more than 1 for coolant outlet 5 and the 1st grade to n-th
Number) level liquid level mirror 3.The liquid level mirror 3 is separately positioned on the liquid bath position corresponding to liquid separation sealing strip composition.The liquid level
Minimum graduation mark 32 and highest graduation mark 31 are set on mirror 3, for playing warning function.
The rear-end plate 1 sets cooling water inlet 14, condensation water to export 13, the 1st grades to n-th grade liquid separation outlet respectively
(10,11,12), and conciliation valve is provided with outside the 1st grade to n-th grade liquid separation outlet (10,11,12), from conciliation valve
Condensation water out is collected to n-th grade of condensation water by pipeline and exported.
Wherein, the steam flow channel and cooling water flow conduits are in interlaced arrangement, and steam flows from top to bottom in steam flow channel,
Cooling water is flowed from the bottom up in cooling water flow conduits, and counter-flow arrangement is formed with steam.Corresponding liquid separation corner apertures in steam flow channel,
Inclined sealing bar and its corresponding top heat transfer space have collectively constituted a liquid separation structure unit.
During work, steam enters steam flow channel by steam-gas inlet corner apertures 65, and heat is released by heat exchanger plates 7 in runner,
Partial vapor is condensed into condensation water.The condensate liquid groove 15 formed using Action of Gravity Field and heat exchanger plates 4 with steam side seal pad 6
Guide functions so that condensation water is collected at the 1st grade of liquid separation corner apertures, and by liquid separation corner apertures (61) that the condensation water of this grade is timely
Discharge.The steam not condensed completely, which continues on steam flow channel, to be continued to condense, will the 2nd grade of condensation water liquid separation corner apertures (62) position
Condensation water is discharged；Continue to condense successively, constantly discharge condensation water in 3rd level to n-th grade of liquid separation corner apertures (63) position.Due to solidifying
Knot liquid film is the dominant thermal resistance of condensation heat transfer, and high mass dryness fraction steam has the higher coefficient of heat transfer.Pass through the 1st grade in condensation process
To n-th grade of liquid separation structure, caused condensation water in condensation process is discharged in time, reduces the thickness of film condensation so that steam
Condensing heat-exchange under higher mass dryness fraction is maintained, helps to reduce condensing heat-exchange thermal resistance, improves the coefficient of heat transfer.
In design of heat exchanger, suitable liquid separation series can be chosen according to actual condition situation, carry out heat exchanger plates and close
The design of packing.With the progress of liquid separation condensation process, the heat exchange area of inclined sealing bar upper space in every grade of liquid separation structure
Gradually increase, every grade of heat transfer space need to ensure the heat exchange area of minimum, and its calculation formula is：
In formula：
AI, min--- minimum heat exchange area, m needed for i-stage2；
mi--- into the steam flow of i-stage, kg/s；
xi--- steam quality after i-stage condensation, j is natural number；
R --- steam latent heat, kJ/kg；
Q --- total heat exchange amount, kW；
A --- the total heat exchange area of heat exchanger, m2；
To ensure condensator outlet steam total condensation, afterbody generally has larger heat exchange area.
In actual applications, to a certain level liquid separation structure, when liquid separation corner apertures resistance to flow output is excessive, condensation that this grade gathers
Liquid increases, and condensation water can overflow above inclined sealing pad, liquid separation condensing heat-exchange effect is deteriorated；Hindered when liquid separation corner apertures exports
When power is too small, the condensation water that heat exchange structure gathers is reduced, and easily causes steam to discharge heat exchanger by liquid separation corner apertures so that liquid separation
Condenser working fails.Therefore, to ensure liquid separation effect, the diameter of heat exchanger plates liquid separation corner apertures need to be designed in suitable scope,
Resistance control valve is set on heat exchanger rear-end plate condensation water outlet flow passage, for adjusting the resistance of this grade of condensation water stream.
As shown in figure 12, for convenience of observe, heat exchanger cover board of front end correspondence position set liquid level mirror 3, for seeing
Survey the position of condensation water.Wherein, the upper edge of the highest fluid level scale line 31 of liquid level mirror and inclined sealing bar on vapor seal pad
Flush；The position flush that minimum liquid level graduation mark 32 passes through leakage fluid dram eductor condenser with steam.Condensation water liquid level is in
When between highest fluid level scale line 31 and minimum liquid level graduation mark 32, represent that liquid separation condenser is in good liquid separation state.
The plate-type condenser that the utility model is related to uses counter-flow arrangement, passes through water side seal pad 8 and steam side seal pad 6
With the Combination Design of heat exchanger plates 4, tilting liquid separation sealing strip is designed on steam side seal pad, condensation water is arranged on heat exchanger plates 4
Liquid separation corner apertures and the structure of condensate liquid groove 15, form multistage liquid separation condensation structure.Constantly discharge devaporation at work
The condensation water formed in journey, the thickness of film condensation is reduced, help to reduce condensing heat-exchange thermal resistance.Simultaneously so that steam maintains
The condensing heat-exchange under higher mass dryness fraction, the higher coefficient of heat transfer is kept, reach the purpose for strengthening condensation heat transfer.
The plate-type condenser that the utility model is related to sets resistance control valve on middle condensation water outlet flow passage, for adjusting
Save the resistance of this grade of condensation water stream.Liquid level mirror is set in heat exchanger cover board of front end, can be with real-time monitored condensation water liquid level
Just.By changing the aperture of valve, the resistance per fraction liquid stream road is adjusted, liquid separation condensation structure can be made in optimal liquid separation
Run under operating mode, ensure the effect of heat exchanger liquid separation condensation.Liquid separation caused by effectively avoiding steam breakdown and condensation water spilling is cold
The problem of condenser fails.
The plate-type condenser that the utility model is related to use only a kind of heat exchanger plates of structure, simple in construction, reduce processing
Cost, it is compact to maintain Conventional plate-type heat exchanger structure, the advantages of better economy.Meanwhile every grade of heat exchanger liquid separation sum of series
The parameters of structural dimension such as the size of heat exchange area can optimize design according to actual load, and practical application feasibility is high.
Preferred embodiment of the present utility model described in detail above, it will be appreciated that the ordinary skill of this area without
Creative work can is needed to make many modifications and variations according to design of the present utility model.Therefore, it is all in the art
Technical staff is conceived in prior art basis by logic analysis, reasoning or can according to limited experiment according to the utility model
, should be among the protection domain determined by the claims with obtained technical scheme.
Claims (8)
1. a kind of multistage liquid separation plate-type condenser, it includes cover board of front end, at least rear-end plate, one piece of heat exchanger plates, at least one piece
Water side seal pad and at least one piece of steam side seal pad, it is characterised in that：The water side seal pad and steam side seal pad difference
Steam flow channel and cooling current are formed positioned at the heat exchanger plates both sides and adjacent heat exchanger plates, cover board of front end or rear-end plate
Road, steam-gas inlet corner apertures, liquid separation corner apertures, cooling water inlet corner apertures, coolant outlet corner apertures and end are provided with the heat exchanger plates
Level condensation midnight liquid corner apertures；The water side seal pad be provided with coolant outlet corner apertures, cooling water inlet corner apertures and with described point
The through hole that liquid corner apertures is engaged；Some liquid separation sealing strips are set in the steam side seal pad, the liquid separation sealing strip with it is adjacent
The heat exchanger plates or cover board of front end side wall composition condensate liquid groove, the condensate liquid groove low side communicates with liquid separation corner apertures.
A kind of 2. multistage liquid separation plate-type condenser as claimed in claim 1, it is characterised in that：The liquid separation sealing strip is inclination
Set, it with vertical direction angle is 30~60 ° that its inclination angle, which is,.
A kind of 3. multistage liquid separation plate-type condenser as claimed in claim 2, it is characterised in that：The inclination angle is and vertical side
It it is 45 ° to angle.
A kind of 4. multistage liquid separation plate-type condenser as claimed in claim 3, it is characterised in that：Set on the heat exchanger plates favourable
In the diversion channel slot of condensation water discharge.
A kind of 5. multistage liquid separation plate-type condenser as claimed in claim 1, it is characterised in that：The liquid separation sealing strip is from upper past
Mutual vertical distance is increase down.
A kind of 6. multistage liquid separation plate-type condenser as claimed in claim 1, it is characterised in that：It is provided with the cover board of front end
Steam-gas inlet, coolant outlet and the 1st grade to n-th grade liquid level mirror；The liquid level mirror is separately positioned on close corresponding to the liquid separation
The liquid bath position of strip of paper used for sealing composition.
A kind of 7. multistage liquid separation plate-type condenser as claimed in claim 1, it is characterised in that：The rear-end plate is set respectively
Cooling water inlet, condensation water outlet, the 1st grade to n-th grade liquid separation outlet, and set outside the 1st grade to n-th grade liquid separation outlet
There is conciliation valve, n-th grade of condensation water outlet is collected to by pipeline from the condensation water of valve out is reconciled.
A kind of 8. multistage liquid separation plate-type condenser as claimed in claim 1, it is characterised in that：Every grade of heat transfer space need to ensure most
Small heat exchange area, its calculation formula are：
In formula：
AI, min--- minimum heat exchange area, m needed for i-stage2；
mi--- into the steam flow of i-stage, kg/s；
xi--- steam quality after i-stage condensation；
R --- steam latent heat, kJ/kg；
Q --- total heat exchange amount, kW；
A --- the total heat exchange area of heat exchanger, m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621234786.4U CN206648507U (en) | 2016-11-17 | 2016-11-17 | A kind of multistage liquid separation plate-type condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621234786.4U CN206648507U (en) | 2016-11-17 | 2016-11-17 | A kind of multistage liquid separation plate-type condenser |
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| Publication Number | Publication Date |
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| CN206648507U true CN206648507U (en) | 2017-11-17 |
Family
ID=60283824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621234786.4U Withdrawn - After Issue CN206648507U (en) | 2016-11-17 | 2016-11-17 | A kind of multistage liquid separation plate-type condenser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643238A (en) * | 2016-11-17 | 2017-05-10 | 广东工业大学 | Multistage liquid-separation plate-type condenser |
| TWI664524B (en) * | 2017-12-04 | 2019-07-01 | 奇鋐科技股份有限公司 | Water-cooling radiator sturcture |
| TWI676100B (en) * | 2017-12-04 | 2019-11-01 | 奇鋐科技股份有限公司 | Multi-outlet-inlet laminated liquid-cooling heat dissipation structure |
| CN112160819A (en) * | 2020-09-18 | 2021-01-01 | 浙江吉利控股集团有限公司 | Exhaust pipe descending system and method |
-
2016
- 2016-11-17 CN CN201621234786.4U patent/CN206648507U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643238A (en) * | 2016-11-17 | 2017-05-10 | 广东工业大学 | Multistage liquid-separation plate-type condenser |
| CN106643238B (en) * | 2016-11-17 | 2023-05-16 | 广东工业大学 | Multistage liquid-separating plate type condenser |
| TWI664524B (en) * | 2017-12-04 | 2019-07-01 | 奇鋐科技股份有限公司 | Water-cooling radiator sturcture |
| TWI676100B (en) * | 2017-12-04 | 2019-11-01 | 奇鋐科技股份有限公司 | Multi-outlet-inlet laminated liquid-cooling heat dissipation structure |
| CN112160819A (en) * | 2020-09-18 | 2021-01-01 | 浙江吉利控股集团有限公司 | Exhaust pipe descending system and method |
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