CN201983533U - Gas-liquid separation type falling film evaporator - Google Patents
Gas-liquid separation type falling film evaporator Download PDFInfo
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- CN201983533U CN201983533U CN2010205192005U CN201020519200U CN201983533U CN 201983533 U CN201983533 U CN 201983533U CN 2010205192005 U CN2010205192005 U CN 2010205192005U CN 201020519200 U CN201020519200 U CN 201020519200U CN 201983533 U CN201983533 U CN 201983533U
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Abstract
The utility model discloses a gas-liquid separation type falling film evaporator, which comprises at least two layers of film distributors with the function of gas-liquid separation, wherein a first layer of film distributor is connected with a refrigerant inlet pipe, and a second layer of film distributor is positioned below the first layer of film distributor; and moreover, at least one group of discharge pipes is arranged between the second layer of film distributor and the first layer of film distributor. The gas-liquid separation type falling film evaporator has the beneficial effects that the effective gas-liquid separation of refrigerants is firstly carried out by arranging at least two layers of film distributors in a falling film evaporator with a horizontal pipe, then the refrigerants are evenly distributed on the outer walls of the discharge pipes in the evaporator, and the influence on heat exchange, which is caused because of the existence of gas phases in the refrigerants, can be avoided; meanwhile, the phenomena that the distribution of the refrigerants in the discharge pipes is not uniform and the refrigerants are locally gathered and are also dried up locally can be effectively avoided, and the heat exchange efficiency is effectively enhanced; and moreover, the aim of saving energy is achieved.
Description
Technical field
The utility model relates to the vaporizer technology field, especially is gas-liquid separated falling film evaporator.
Background technology
The present socioeconomic fast development of China will inevitably drive the sustainable growth of energy demand total amount, thus the external degree of dependence of aggravation China's energy supply; China's energy supply will present overall tight slightly situation over the next several years.From today that original people's livelihood problem changes strategic issue into, the energy-conserving and environment-protective problem receives much attention in energy problem.In China's energy consumes, guarantee that cleaning, economy, abundance, safe energy supply are the long-term great bottlenecks of China's development, wherein China's building energy consumption has accounted for 27.8% of total energy consumption, is about 3 times of same latitude country, and seriously polluted.How with healthy, the comfortable combination, cutting down the consumption of energy becomes primarily studying a question of building air conditioning development.
Air-conditioning is an energy-consuming product, and power consumption has surpassed 18% of national total electricity consumption, and along with the raising of people's living standard, its power consumption also can further increase, and improves air-conditioning efficiency level reduces air conditioning energy consumption beyond doubt from the source effective way.The disposal of pollutants of air-conditioning system also is considered to cause the one of the main reasons of greenhouse effects, had a strong impact on human existence safety, therefore except developing low pollution or free of contamination refrigeration working medium, the discharge capacity that effectively reduces pollutant also is a valid approach.In addition, under existing situation, for air conditioner refrigerating industry itself, price remains one of the topmost competition in air conditioner industry market.The prices of raw and semifnished materials such as the copper that air-conditioning production in recent years needs, steel are extremely unstable, significantly vibration occurs, increased the risk of enterprise scale expansion development.Therefore the maximum common problem that already faces at following a very long time refrigeration air-conditioner is: realize the optimum balance of energy-saving and environmental protection and cost.
The current application evaporimeter of air conditioner cold water unit more widely mainly contains full-liquid type and dry type, yet exists problems such as excessive and heat exchange efficiency dry evaporator of the charging amount of flooded evaporator is not high, has restricted the development of air conditioner industry.And fountain (or falling film type) evaporimeter is considered to substitute the most promising selection that conventional evaporator improves heat exchange efficiency reduction disposal of pollutants.Falling liquid film boiling technology, early 1990s by the exploitation of French air liquefaction company, cold-producing medium lands refrigerant liquid equably on the upper strata pipe face that accumulates in compact heating surface bank in the housing under the distributor effect and forms uniform liquid film, has begun the falling film evaporation process thus.Because of liquid gathers the restriction that is subjected to thickness of liquid film on the pipe face of upper strata, excess liquid will together with the gas behind the ebullition, gasification on the pipe face of upper strata successively downwards drippage flow and on lower floor's pipe face, successively form uniform liquid film, until all " evaporate to dryness ".In this process, because of the gap between compact heat-transfer pipe beam tube narrow and small, gas after the explosive evaporation is when the slype of flowing pipe interfascicular, can produce certain souring to the liquid film on each layer pipe face, also strengthened the disturbance of liquid film on each pipe face because of the drippage impact of supernatant liquid again simultaneously, so make its film coefficient of heat transfer be able to further raising.At last, the gas that has gasified is being carried isolated lubricating oil secretly and is being got back to compressor through the return-air mouth of pipe of being located at housing bottom, thereby finishes whole evaporation processes.This boiling mode has been eliminated the temperature difference loss that the hydrostatic pressure effect causes than large space boiling, simultaneously, and liquid self gravitation and washing away under double-deck the acting on of boil-off gas, the flowability of liquid film increases on the pipeline, the thickness attenuate, the disturbance aggravation has realized the film attitude evaporation of strong disturbance.Theoretical research is found: the comparable pool boiling film coefficient of heat transfer of level spray its film coefficient of heat transfer of falling film evaporation is high 3～5 times; With respect to convective boiling in the pipe, this mode has solved the inhomogeneities that liquid distributes, and its heat transfer coefficient no longer is subjected to the influence of cold-producing medium mass dryness fraction.Simultaneously, because of the shortening of evaporation flow process, pressure drop is reduced, and has reduced temperature difference loss from another angle, has improved its heat transfer efficiency.
Obviously, the high-pressure fog falling film evaporator has the various advantages of flooded evaporator and dry evaporator concurrently and has overcome its deficiency, and its characteristics and advantage are mainly reflected in the following aspects:
(1) improves energy utilization efficiency, energy savings
Spray-type evaporator has high heat-transfer performance and ease for operation, has increased the turbulent flow of extratubal fluid, and overall heat-transfer coefficient is increased, and then increases heat transfer efficiency.Contrast traditional full-liquid type and dry evaporator, have that heat transfer coefficient height, temperature loss are low, liquid film is evenly distributed, characteristics such as the evaporation process pressure loss is little, and oil return is effective.By the appropriate design of system, spray-type evaporator is higher 3～5 times than the heat transfer coefficient of traditional flooded evaporator, and is higher about 1 times than vertical tube falling film evaporator.These advantages can reduce the heat transfer temperature difference of evaporimeter, improve the COP of whole air conditioner cold water unit, thereby save the energy.
(2) reduce discharging, the protection environment
One of advantage of spray-type evaporator is to reduce the charging amount of cold-producing medium greatly, generally reduce 30-90% than flooded evaporator charging amount, this is of great advantage to the greenhouse effects that the minimizing freon refrigerant causes, and can improve the security of its operation especially to inflammable hydrocarbon refrigeration unit.In addition since spray-type evaporator owing to improved heat exchange efficiency, thereby improved the comprehensive COP of air conditioner cold water unit, reduced compressor power consumption, also reduced the disposal of pollutants of generating link in the time of energy-conservation, effectively protected environment.
(3) save manufacturing and operating cost
After systematized optimal design, can effectively reduce refrigerant charge, reduce the refrigerant charging expense; Improve heat exchanger shell-side utilization of space, reduce the equipment investment expense of heat exchanger; Improve the evaporimeter heat exchange efficiency, improve the COP of refrigeration unit, thereby reduced the operating cost of unit; The refrigeration system oil return is convenient, and the evaporator water side is cleaned convenient, thereby has reduced the maintenance cost of system.
Though yet the evaporimeter of using the design of spray falling liquid film in the vapor compression refrigeration device is theoretic favourable, how really to realize substituting of conventional evaporator, effectively improve heat exchange efficiency, reduce disposal of pollutants, reduce cost then need global design link, processing link and with the collaborative consideration of a plurality of links such as coupling link of refrigeration system, it is a kind of than severe challenge that this point has been proved to be.By to the optimal design of the total systemization of spray-type evaporator and with the multi-state coupling research of handpiece Water Chilling Units, be intended to further improve energy utilization efficiency, reduce refrigerant charge, the design investment of reduction system simultaneously.The successful research and development of this New Evaporator for building energy-saving, reduce discharging, reduce cost deeply have certain impetus, huge market prospects are arranged.
Evaporimeter is as the important component part of refrigeration system, and its volatility has a significant impact for whole system.The shell-and-tube refrigerant evaporator of current extensive use comprises mainly that full-liquid type and dry evaporator exist that refrigerant charge is too much, efficient is low or problem such as oil return difficulty, and spray-type evaporator is considered to the most promising refrigerant evaporator that can overcome the above problems.Spray-type evaporator (also being falling film evaporator) was born the earliest in 1888, but had only the minority scholar to be devoted to this Study on Technology before the seventies in 20th century.Be subjected to the driving of oil crisis for the second time the eighties in 20th century in early days, many scholars this technology that begins one's study, focus mainly concentrates on the application of horizontal pipe falling film evaporation device in ocean thermal energy conversion (Otec) system.
Spray-type evaporator has high thermal conductivity and ease for operation, now has been widely used in fields such as desalinization, ocean thermal energy conversion, Chemical Engineering.Sprinkling falling-film evaporator starts from the nineties in 20th century in the application of refrigeration industry, along with progressively eliminating of fluorochlorohydrocarbon (CFC), refrigeration industry to refrigeration system energy-efficient, environmental protection requirement is more and more higher, sprinkling falling-film evaporator is because it is energy-efficient, environmental protection, economic dispatch advantage and become the evaporimeter that application prospect is arranged most gradually.The advantage that the horizontal pipe falling film evaporation utensil has traditional full-liquid type or dry evaporator to compare exists: (1) heat transfer coefficient height.The inner main heat exchange mode of horizontal pipe falling film evaporation device is falling film evaporation, promptly the refrigerant liquid that flows into from the evaporimeter top washes away horizontal tube, streams film forming in its outside, absorbs heat the hot fluid in managing simultaneously, produce gas at liquid-solid, liquid gas interface, reach the purpose of hot fluid in the cooling tube.Because on liquid-solid, gas-liquid interface, all may undergo phase transition, so falling film evaporation shows very high heat exchange property.Can allow evaporating temperature to raise like this, improve the cycle efficieny of system; High in addition heat transfer coefficient can reduce the evaporimeter volume, saves space and input cost.(2) filling quantity of refrigerant is few.Reduced the input and the maintenance cost of cold-producing medium on the one hand, also greatly reduced the cold-producing medium leakage probability on the other hand, thereby make the screening expanded range of cold-producing medium.
Though no matter spray-type evaporator is in efficient in theory, economy still is that the environmental protection aspect has all embodied the incomparable advantage of other shell-and-tube evaporators, yet because the fountain evaporation is subjected to refrigerant property, the influence of refrigerant flow is bigger, be not that performance for spray-type evaporator under any operating condition of any cold-producing medium all is better than other evaporimeters, and still there are a series of difficult problems in the research of spray-type evaporator and application, restricting the application of horizontal pipe falling film evaporation device, mainly be: refrigerant liquid at the evaporation tube outer surface along pipe range, pipe Zhou Fangxiang skewness causes the generation of local dry-out.Therefore need to improve.
The utility model content
At the deficiency that above-mentioned prior art exists, the purpose of this utility model provides that cold-producing medium is evenly distributed, gas-liquid separated falling film evaporator efficiently outside evaporation tube.
To achieve these goals, the technical scheme that the utility model adopted is: gas-liquid separated falling film evaporator, comprise minimum two-layer filming device with gas-liquid separating function, the ground floor filming device is connected with the refrigerant inlet pipe, second layer filming device is positioned at the below of ground floor filming device, and between second layer filming device and ground floor filming device the rarest one group of comb.Can realize the effective gas-liquid separation of cold-producing medium and effectively in comb, carry out uniformly by two-layer filming device, improve heat exchange efficiency.
Described ground floor filming device adopts three grades of distribution structures, and it comprises two-phase distributor, gas-liquid separator and liquid phase distributor, and two-phase distributor, gas-liquid separator and liquid phase distributor set gradually from top to bottom, and the two-phase distributor is connected with the refrigerant inlet pipe.Cold-producing medium is come in after the two-phase distributor falls into gas-liquid separator after distributing from the refrigerant inlet pipe, and gas-liquid separator carries out falling into after the gas-liquid separation liquid phase distributor and carries out falling into comb after uniform, contacts with the outer surface of comb.
Described two-phase distributor is made up of a vertical water conservancy diversion groove and some horizontal water conservancy diversion grooves, and laterally the water conservancy diversion groove is connected with vertical water conservancy diversion groove, and the bottom in horizontal water conservancy diversion groove and vertical water conservancy diversion groove is provided with the water conservancy diversion through hole of some circles.
Described gas-liquid separator is the flat board that is provided with raised brim around, has offered some openings on flat board, and offers some adjustment holes around opening.The aperture of adjustment hole is littler than the aperture of opening.
Described liquid phase distributor is the flat board that is provided with sieve aperture, is provided with the fin that prevents that cold-producing medium from flowing out from the edge at the edge of flat board; The diameter of sieve aperture is greater than opening, and the opening on the gas-liquid separator on the position of opening of sieve aperture and upper strata staggers, and can realize that like this liquid phase refrigerant uniform distribution flows on the outer tube of comb.
Described second layer filming device is to adopt the two-stage distribution structure, and it comprises the gas-liquid separator and the second liquid phase distributor, and the gas-liquid separator and the second liquid phase distributor set gradually from top to bottom.
The described second liquid phase distributor is the flat board that is provided with spout hole, forms guiding gutter between the adjacent spout hole, is provided with the side plate that prevents that cold-producing medium from flowing out from the edge at the edge of flat board.
Described spout hole is level and smooth cambered surface with junction, dull and stereotyped bottom.
Two groups of combs preferably are set between first filming device and second filming device, and comb adopts in-line arrangement to arrange, the liquid that guarantees cold-producing medium is to drip fully wetting its outer surface of shape mode.
Compared with prior art, the beneficial effects of the utility model are: by minimum two-layer filming device is set in the horizontal pipe falling film evaporation device, cold-producing medium is carried out effective gas-liquid separation earlier, be distributed on then on the comb outer wall in the evaporimeter, can avoid existence because of gas phase in the cold-producing medium, and heat exchanging impacts, simultaneously can effectively avoid cold-producing medium skewness in comb, assemble in the part, and dry phenomenon is arranged in the part, effectively improve heat exchange efficiency, and reach purpose of energy saving.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified;
Fig. 1 is the vertical sectional structure schematic diagram of the gas-liquid separated falling film evaporator of the utility model;
Fig. 2 is the sectional structure schematic diagram of the gas-liquid separated falling film evaporator of the utility model in A-A portion;
Fig. 3 is the sectional structure schematic diagram of the ground floor filming device in the gas-liquid separated falling film evaporator of the utility model;
Fig. 4 is the plan structure schematic diagram of the two-phase distributor in the gas-liquid separated falling film evaporator of the utility model;
Fig. 5 is the B-B portion sectional structure schematic diagram of the two-phase distributor in the gas-liquid separated falling film evaporator of the utility model;
Fig. 6 is the plan structure schematic diagram of the gas-liquid separator in the gas-liquid separated falling film evaporator of the utility model;
Fig. 7 is the C-C portion sectional structure schematic diagram of the gas-liquid separator in the gas-liquid separated falling film evaporator of the utility model;
Fig. 8 is the plan structure schematic diagram of the liquid phase distributor in the gas-liquid separated falling film evaporator of the utility model;
Fig. 9 is the D-D portion sectional structure schematic diagram of the liquid phase distributor in the gas-liquid separated falling film evaporator of the utility model;
Figure 10 is the sectional structure schematic diagram of ground floor filming device in the gas-liquid separated falling film evaporator of the utility model;
Figure 11 is the second liquid phase distributor plan structure schematic diagram in the gas-liquid separated falling film evaporator of the utility model;
Figure 12 is the E-E portion sectional structure schematic diagram 1 of the second liquid phase distributor in the gas-liquid separated falling film evaporator of the utility model;
Figure 13 is the E-E portion sectional structure schematic diagram 2 of the second liquid phase distributor in the gas-liquid separated falling film evaporator of the utility model.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the gas-liquid separated falling film evaporator of the utility model is described in detail.
Gas-liquid separated falling film evaporator, as depicted in figs. 1 and 2, in evaporator shell 1, be provided with outside some heat exchange pipes 2, also comprise minimum two-layer filming device with gas-liquid separating function, ground floor filming device 3 is connected with the refrigerant inlet pipe 4 of evaporimeter, second layer filming device 5 is positioned at the below of ground floor filming device 3, and is provided with minimum one group of comb 2 between second layer filming device 5 and ground floor filming device 3.Cold-producing medium carries out earlier effective gas-liquid separation and effectively carries out uniform outside the comb 2 of its lower floor from refrigerant inlet pipe 4 ground floor filming device 2; Drop to cold-producing medium after the fluid heat exchange in the comb 2 and to carry out gas-liquid separation once more in the second layer filming device 5, in lower floor's comb 2, carry out uniform then.Can effectively improve heat exchange efficiency, energy savings like this.
As shown in Figure 3, ground floor filming device 3 adopts three grades of distribution structures, and it comprises two-phase distributor 31, gas-liquid separator 32 and liquid phase distributor 33, and two-phase distributor 31, gas-liquid separator 32 and liquid phase distributor 33 set gradually from top to bottom; Two-phase distributor 31 is connected with refrigerant inlet pipe 4.Cold-producing medium enters after two-phase distributor 31 falls into gas-liquid separator 32 after distributing from refrigerant inlet pipe 4, and gas-liquid separator 32 carries out falling into liquid phase distributor 33 after the gas-liquid separation and carries out on comb 2 uniform.
As shown in Figure 4 and Figure 5, two-phase distributor 31 can be made up of a vertical water conservancy diversion groove 312 and some horizontal water conservancy diversion grooves 313, laterally water conservancy diversion groove 313 is connected with vertical water conservancy diversion groove 312, and the bottom in horizontal water conservancy diversion groove 313 and vertical water conservancy diversion groove 312 is provided with and can be the water conservancy diversion through hole 311 of circle.The cold-producing medium of two-phase state enters the back from refrigerant inlet pipe 4 and distributes to transverse channels 313 along the vertical water conservancy diversion groove 312 the two-phase distributor, makes cold-producing medium flow to the end of horizontal water conservancy diversion groove 313 and vertical water conservancy diversion groove 312 at length and width.Cold-producing medium falls into the gas-liquid separator 32 of lower floor uniformly from water conservancy diversion through hole 311.The cold-producing medium that can effectively refrigerant inlet pipe 4 be come in carries out uniformly like this, avoids its a certain position in gas-liquid separator 32 excessively to assemble, and influences the effect of gas-liquid separation.
In addition, the two-phase distributor also can be piled up by cover plate and base plate to be formed, and is reserved with the gap between cover plate and the base plate.Cover plate can be a strip, offers the hole in the middle of it and links to each other with refrigerant inlet pipe 4; On base plate, be provided with the groove of the shape in length and breadth of certain depth, in the middle of groove, be provided with circular pod apertures at a certain distance.
Shown in Fig. 6 and 7, gas-liquid separator 32 is the flat board that is provided with raised brim 323 around, has offered some openings 321 on the position that faces comb on the flat board, and offers some adjustment holes 322 around opening 321.Adjustment hole 322 is evenly to arrange around opening 321.The aperture of adjustment hole 322 is littler than the aperture of opening 321.Opening 321 and adjustment hole 322 can be arranged to plurality of rows at flat board, and the pore size of opening 321 and adjustment hole 322 and distributed number form one deck liquid film with cold-producing medium on flat board, and the gas phase composition in the prevention cold-producing medium enters lower floor and is as the criterion.In the flow of refrigerant process, the gas phase composition in the two phase refrigerant is stopped in the top of gas-liquid separator 32, realizes gas-liquid separation, has only liquid can enter into the liquid phase distributor 33 of lower floor by capillarity.
As Fig. 8 and shown in Figure 9, liquid phase distributor 33 is for being provided with the flat board of sieve aperture 331.Be provided with the fin 332 that prevents that cold-producing medium from flowing out from the edge at the edge of flat board.The diameter of described sieve aperture 331 is greater than opening 321, and the opening 321 on the gas-liquid separator 32 on the position of opening of sieve aperture 331 and upper strata staggers, and can realize that like this liquid phase refrigerant uniform distribution flows on the outer tube of comb 2.
As shown in figure 10, second layer filming device 5 can be to adopt the two-stage distribution structure, and it comprises the gas-liquid separator 32 and the second liquid phase distributor 52, and the gas-liquid separator 32 and the second liquid phase distributor 52 set gradually from top to bottom.The cold-producing medium that upper strata comb 2 drops falls into the second liquid phase distributor 52 after gas-liquid separator 32 carries out gas-liquid separation carries out uniform back and contacts with the comb 2 of lower floor and carry out heat exchange.
As Figure 11 and shown in Figure 12, the second liquid phase distributor 52 is provided with the side plate 522 of projection for being provided with the flat board of spout hole 521 in the edge of flat board.Form guiding gutter 523 between the adjacent spout hole 521.The height that described spout hole 521 is provided with on flat board is irregular.As shown in figure 13, be level and smooth cambered surface in the spout hole 521 and the junction, dull and stereotyped bottom of the second liquid phase distributor 52, avoided the gap of cold-producing medium between spout hole 521 and dull and stereotyped bottom to be detained like this.
Between first filming device 3 and second filming device 5 two groups of combs 2 are set preferably, comb 2 adopts in-line arrangement to arrange, the liquid that guarantees cold-producing medium is to drip fully wetting its outer surface of shape mode.Comb 2 can be the heat exchanger tube of difformity and material, and the heat exchanger tube that is to say difformity and material is all in this scope of patent protection.Wherein preferred oval cast.The space of comb 2 distance first filming devices 3 and second filming device 5 to be helping from tube bank outer surface generation vapor phase refrigerant lateral flow, simultaneously liquid phase refrigerant dripped shape and is as the criterion attached to the minimum that influences of tube outer surface.
The liquid phase distributor 33 and the second liquid phase distributor 52 in described ground floor filming device 3 and the second layer filming device 5 also can exchange use, or the single liquid phase distributor 33 or the second liquid phase distributor 52 of all using.
At the many evaporimeter inside of comb 2 quantity, can be provided with the 3rd layer of filming device or the filming device more than three layers.The structure of the 3rd layer of filming device can be the same with second layer filming device 5.The structure of the 3rd layer of filming device and second layer filming device 5 also can be structural similarities.The 3rd layer of filming device also can be to adopt the two-stage distribution structure, and it comprises the gas-liquid separator 32 and the second liquid phase distributor 52, and the gas-liquid separator 32 and the second liquid phase distributor 52 set gradually from top to bottom.The cold-producing medium that upper strata comb 2 drops falls into the second liquid phase distributor 52 after gas-liquid separator 32 carries out gas-liquid separation carries out uniform back and contacts with the comb 2 of lower floor and carry out heat exchange.Wherein, the circulation aperture of gas-liquid separator 32 is littler than the opening of the gas-liquid separator in the second layer filming device 32, the aperture of adjustment hole is also little with respect to the adjustment hole of the gas-liquid separator in the second layer filming device 32 in addition, and quantity all can reduce, and is the best to guarantee good gas-liquid separation effect.Its lower floor's liquid distributor is a slab construction, and the spout hole of protrusion is set at bottom adjacent tubes row's centre-to-centre spacing place.Consistent with the perforate quantity and the vertical and horizontal pipe number of width along length, spout hole is divided into highly different some groups, and cold-producing medium becomes biphase gas and liquid flow at the liquid film that first group of tube bank outer surface forms after evaporation.Behind gas-liquid separator, liquid phase refrigerant splashes in the liquid distributor, according to the refrigerant quality difference that flows into, forms highly different liquid levels in the flat board of liquid distributor, evenly flows on the comb of bottom correspondence from the spout hole that covers.Cold-producing medium flow process relative set in the comb is different group number, can adjust the size of evaporation current amount according to payload, by the adjusting of the different load fulfillment capability of load.
The foregoing description is not to be limitation of the present invention; the those of ordinary skill in relevant technologies field; under the situation that does not break away from the spirit and scope of the present invention; can also make various variations and modification; therefore all technical schemes that are equal to also should belong to category of the present invention, and scope of patent protection of the present invention should be limited by each claim.
Claims (9)
1. gas-liquid separated falling film evaporator, it is characterized in that: comprise minimum two-layer filming device with gas-liquid separating function, the ground floor filming device is connected with the refrigerant inlet pipe of evaporimeter, second layer filming device is positioned at the below of ground floor filming device, and between second layer filming device and ground floor filming device the rarest one group of comb.
2. gas-liquid separated falling film evaporator as claimed in claim 1, it is characterized in that: described ground floor filming device adopts three grades of distribution structures, it comprises two-phase distributor, gas-liquid separator and liquid phase distributor, two-phase distributor, gas-liquid separator and liquid phase distributor set gradually from top to bottom, and the two-phase distributor is connected with the inlet tube of cold-producing medium.
3. gas-liquid separated falling film evaporator as claimed in claim 2, it is characterized in that: described two-phase distributor is made up of a vertical water conservancy diversion groove and some horizontal water conservancy diversion grooves, laterally the water conservancy diversion groove is connected with vertical water conservancy diversion groove, and the bottom in horizontal water conservancy diversion groove and vertical water conservancy diversion groove is provided with the water conservancy diversion through hole.
4. gas-liquid separated falling film evaporator as claimed in claim 2 is characterized in that: described gas-liquid separator is the flat board that is provided with raised brim around, has offered some openings on flat board, and offers some adjustment holes around opening; The aperture of adjustment hole is littler than the aperture of opening.
5. gas-liquid separated falling film evaporator as claimed in claim 2 is characterized in that: described liquid phase distributor is the flat board that is provided with sieve aperture, is provided with the fin that prevents that cold-producing medium from flowing out from the edge at the edge of flat board; The diameter of sieve aperture is greater than the diameter of opening, and the opening on the gas-liquid separator on the position of opening of sieve aperture and upper strata staggers.
6. gas-liquid separated falling film evaporator as claimed in claim 1, it is characterized in that: described second layer filming device is to adopt the two-stage distribution structure, it comprises the gas-liquid separator and the second liquid phase distributor, and the gas-liquid separator and the second liquid phase distributor set gradually from top to bottom.
7. gas-liquid separated falling film evaporator as claimed in claim 6 is characterized in that: the described second liquid phase distributor is the flat board that is provided with spout hole, forms guiding gutter between the adjacent spout hole.
8. gas-liquid separated falling film evaporator as claimed in claim 7 is characterized in that: spout hole and junction, dull and stereotyped bottom at the second liquid phase distributor are level and smooth cambered surface.
9. gas-liquid separated falling film evaporator as claimed in claim 1 is characterized in that: two groups of combs preferably are set between first filming device and second filming device, and comb adopts in-line arrangement to arrange.
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102000437A (en) * | 2010-09-03 | 2011-04-06 | 广东工业大学 | Falling film evaporator with gas-liquid separating and membrane-distributing functions |
| CN102759227A (en) * | 2012-07-16 | 2012-10-31 | 佛山市顺德区高美空调设备有限公司 | Falling film evaporator for refrigeration circuit |
| CN103851834A (en) * | 2012-11-30 | 2014-06-11 | Lg电子株式会社 | Evaporator and turbo chiller including the same |
| CN105899892A (en) * | 2014-01-15 | 2016-08-24 | 开利公司 | Refrigerant distributor for falling film evaporator |
| CN106123400A (en) * | 2016-07-06 | 2016-11-16 | 杭州赛富特设备有限公司 | A kind of falling film type evaporation device of band gravity separatory |
| CN106288523A (en) * | 2015-06-29 | 2017-01-04 | 约克（无锡）空调冷冻设备有限公司 | Condensation and falling film evaporation mixed heat exchanger |
| CN106766398A (en) * | 2017-02-23 | 2017-05-31 | 大连冷冻机股份有限公司 | Suitable for the labyrinth type liquid baffle structure of falling film evaporator |
| CN107091545A (en) * | 2016-02-18 | 2017-08-25 | 约克（无锡）空调冷冻设备有限公司 | A kind of falling film evaporator suitable for low pressure refrigerant |
| CN107101421A (en) * | 2017-05-04 | 2017-08-29 | 珠海格力电器股份有限公司 | Downward film evaporator |
| CN107356017A (en) * | 2016-05-09 | 2017-11-17 | 浙江盾安人工环境股份有限公司 | Downward film evaporator liquid distributor |
| WO2018090625A1 (en) * | 2016-11-18 | 2018-05-24 | 重庆美的通用制冷设备有限公司 | Tube shell type falling-film evaporator and water chilling unit |
| CN108955326A (en) * | 2018-07-12 | 2018-12-07 | 上海交通大学 | Microchannel gas-Liquid separating evaporator device based on distribution recovery approach |
| CN113251708A (en) * | 2020-02-13 | 2021-08-13 | Lg电子株式会社 | Evaporator with a heat exchanger |
| US11624533B2 (en) | 2020-02-13 | 2023-04-11 | Lg Electronics Inc. | Evaporator |
| US11898780B2 (en) | 2020-02-13 | 2024-02-13 | Lg Electronics Inc. | Evaporator |
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2010
- 2010-09-03 CN CN2010205192005U patent/CN201983533U/en not_active Expired - Fee Related
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102000437A (en) * | 2010-09-03 | 2011-04-06 | 广东工业大学 | Falling film evaporator with gas-liquid separating and membrane-distributing functions |
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