CN101191683B - Jet flow circulated sprinkling falling-film evaporator - Google Patents
Jet flow circulated sprinkling falling-film evaporator Download PDFInfo
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- CN101191683B CN101191683B CN 200610118931 CN200610118931A CN101191683B CN 101191683 B CN101191683 B CN 101191683B CN 200610118931 CN200610118931 CN 200610118931 CN 200610118931 A CN200610118931 A CN 200610118931A CN 101191683 B CN101191683 B CN 101191683B
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- evaporator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2341/00—Details of ejectors not being used as compression device; Details of flow restrictors or expansion valves
- F25B2341/001—Ejectors not being used as compression device
- F25B2341/0016—Ejectors for creating an oil recirculation
Abstract
A fluidic circulation spray falling film evaporator comprises an evaporator shell, a gas outlet arranged on the upper part of the evaporator shell, a heat-exchange tube bundle, a distributor and a gas-liquid separator which are axially distributed in the evaporator shell; the distributor is positioned on the upper part of the heat-exchange tube bundle; the gas-liquid separator is positioned between the distributor and the gas outlet; the invention also comprises a fluidic pump; the high-pressure refrigerant inlet of the fluidic pump is communicated with a condenser; the circulating refrigerantinlet is communicated with the bottom of the evaporator shell; the mixed refrigerant outlet is communicated with the distributor. Compared with the prior art of the pumpless spray falling film type evaporator, the invention can reduce the heat-exchange area of the evaporator by 10 percent around. Compared with the prior art of the pump spray falling film type evaporator, the invention consumes nocirculation pump power, therefore, the invention is a spray falling film type evaporator technology with high performance-cost ratio.
Description
Technical field
The present invention relates to the vaporizer technology field, concrete relate to a kind of jet flow circulated sprinkling falling-film evaporator.
Background technology
In vapor-compression refrigerant cycle, evaporimeter commonly used mainly contains plate type heat exchanger and shell and tube exchanger.Shell-tube type comprises patterns such as dry type, full-liquid type and falling film type again.
As shown in Figure 1, the basic mode of flooded evaporator is that the inside and outside thermoexcell 03 of evaporimeter is immersed in cold-producing medium 04 liquid, and cold-producing medium 04 absorbs and evaporates after heat exchanger tube 03 is managed the heat of interior water, and what it carried out is a kind of pool boiling heat exchange.Because have liquid refrigeration system static pressure in the flooded evaporator, the pressure of bottom liquid refrigerant is higher, thereby pairing cold-producing medium saturated-steam temperature causes heat transfer temperature difference to reduce also than higher, makes the decline of flooded evaporator heat transfer property.Flooded evaporator often is designed to have when operation one to three row's heat-transfer pipe 03 to be exposed on the liquid level, takes out of to prevent drop.Another technical barrier of flooded evaporator is a refrigerator oil oil return problem, the oil return of general employing compressor air suction injection mode, because refrigerator oil and cold-producing medium dissolve each other, refrigerator oil concentration is lower in the mixed liquor, amount of refrigerant in the uncontrollable withdrawing fluid of this mode, make the part back flow of refrigerant in compressor, reduce cooling system efficient.
As shown in Figure 2, to be cold-producing medium sprayed by uniform distribution on the heat-exchanging tube bundle 14 in the evaporimeter by designing distributor 13 at the evaporimeter top basic mode of falling film type, absorbs the heat of vaporization in heat-exchanging tube bundle 14 pipes.Relative flooded evaporator, falling film type has following several big advantage: a) owing to there is not the sort of static pressure problem of full-liquid type, made full use of heat transfer area simultaneously, heat exchange property is improved; B) reduced the coolant injection amount; C) the oil return performance is good, and cold-producing medium is after evaporation, and the refrigerator oil concentration of mixing material that flows to the cold-producing medium of base of evaporator and refrigerator oil is higher, is convenient to directly pump into compressor.
General two kinds of forms of repeatedly evaporation (as Fig. 3) that adopt the spray downward film evaporator that direct disposable evaporation (as shown in Figure 2) and plug-in circulating pump are arranged promptly do not have pump spray downward film evaporator and pump spray downward film evaporator are arranged.Referring to Fig. 2, no pump spray downward film evaporator all evaporates through behind the abundant evaporating heat-exchanging pipe be meant that cold-producing medium sprays in evaporimeter under.Base of evaporator has only the liquid refrigerant that has on a small quantity to deposit, and refrigerator oil concentration is higher in the mixed liquor.Do not exist with liquid state at base of evaporator for making liquid refrigerant obtain abundant heat exchange evaporation, heat-exchanging tube bundle 14 row's numbers are abundant in the evaporimeter, make the evaporimeter volume seem too huge like this, and the unit are heat exchange efficiency is also lower.Referring to Fig. 3, there is pump spray downward film evaporator to be meant and outside evaporimeter, adds a circulating pump 16 again, be used for aspirating the liquid refrigerant that is deposited on base of evaporator and deliver to circulated sprinkling in the distributor 13.Disposable relatively vaporation-type, it can improve the unit are heat exchange efficiency, has reduced the volume of evaporimeter greatly.But mean and to increase more power consumption that structure is also more complicated owing to add a circulating pump 16.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of jet flow circulated sprinkling falling-film evaporator, to solve the existing problems of pattern evaporimeter such as existing full-liquid type and falling film type.
Technical problem to be solved by this invention can be achieved through the following technical solutions:
A kind of jet flow circulated sprinkling falling-film evaporator, comprise evaporator shell, be arranged on the gas vent on evaporator shell top, be disposed axially in heat-exchanging tube bundle, distributor, gas-liquid separation membrane in the evaporator shell, distributor is positioned at the heat-exchanging tube bundle top, and gas-liquid separation membrane is between distributor and gas vent, it is characterized in that, also comprise a jet pump, the inlet of the high-pressure refrigerant of this jet pump is communicated with condenser, the circulating refrigerant inlet is communicated with the evaporator shell bottom, and the mix refrigerant outlet is communicated with described distributor.
Described jet pump is gas-liquid-liquid type dual-phase jet pump.
Compare with existing no pump spray downward film evaporator technology, the present invention can reduce evaporimeter heat exchange area about 10%.With there being pump spray downward film evaporator technology to compare, the present invention does not have circulation pump power consumption.Therefore the present invention is the spray downward film evaporator technology of a high performance-price ratio.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is a flooded evaporator structure principle chart in the prior art;
Fig. 2 is a conventional spray downward film evaporator structure principle chart in the prior art;
Fig. 3 is conventional spray downward film evaporator structure principle chart for plug-in circulating pump in the prior art repeatedly evaporates;
Fig. 4 is a jet flow circulated sprinkling falling-film evaporator structure principle chart of the present invention;
Fig. 5 is jet flow circulated sprinkling falling-film evaporator loop structure figure of the present invention;
Wherein:
Among Fig. 1,01 is refrigerant outlet, and 02 is refrigerant inlet, and 03 is heat exchanger tube, and 04 is cold-producing medium, and 05 is evaporator shell.
Among Fig. 2,11 is gas vent, and 12 is gas-liquid separation membrane, and 13 is distributor, and 14 is heat-exchanging tube bundle, and 15 is evaporator shell.
Among Fig. 3,11 is gas vent, and 12 is gas-liquid separation membrane, and 13 is distributor, and 14 is heat-exchanging tube bundle, and 15 is evaporator shell, and 16 is water circulating pump.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with the specific embodiment, further set forth the present invention.
Referring to Fig. 4 and Fig. 5, a kind of jet flow circulated sprinkling falling-film evaporator, comprise evaporator shell 15, be arranged on the gas vent 11 on evaporator shell 15 tops, be disposed axially in the heat-exchanging tube bundle 14 in the evaporator shell 15, distributor 13, gas-liquid separation membrane 12, distributor 13 is positioned at heat-exchanging tube bundle 14 tops, and gas-liquid separation membrane 12 is between distributor 13 and gas vent 11, also comprise a jet pump 17, the inlet 171 of the high-pressure refrigerant of this jet pump 17 is communicated with condenser 19 by a magnetic valve 18, the circulating refrigerant inlet is communicated with evaporator shell 15 bottoms, and the mix refrigerant outlet is communicated with distributor 13.The jet pump 17 that adopts is gas-liquid-liquid type dual-phase jet pump.Compressor 20 is arranged between condenser 19 and the jet flow circulated sprinkling falling-film evaporator of the present invention.
The recycling high-pressure refrigerant suction of coming out from condenser 19 of the present invention is deposited on jet flow circulated sprinkling falling-film evaporator bottom liquid refrigerant.Cold-producing medium still has part cold-producing medium and evaporimeter heat-exchanging tube bundle 14 to have little time heat exchange after spraying falling liquid films through distributor 13, continues to be deposited on the jet flow circulated sprinkling falling-film evaporator bottom together with liquid form and the less amount of lubrication oil that mixes wherein.Because liquid refrigerant density is bigger than lubricating oil, first layering so bottom liquid is known from experience, the upper strata is a lubricating oil, and lower floor is a cold-producing medium.The recycling high-pressure refrigerant injection that comes out from condenser 19 is deposited on the liquid refrigerant of jet flow circulated sprinkling falling-film evaporator bottom, with after the refrigerant mixed of condenser 19, spray on the heat-exchanging tube bundle 14 of jet flow circulated sprinkling falling-film evaporator so circulation once more.During system stable operation, because can circulating, cold-producing medium repeatedly in jet flow circulated sprinkling falling-film evaporator, carries out heat exchange with heat-exchanging tube bundle 14, so under the constant situation of cold and power consumption, the common relatively spray downward film evaporator of heat-exchanging tube bundle 14 can significantly reduce.When improving unit are heat exchange amount, saved the heat-exchanging tube bundle material.And with respect to full-liquid type, jet spray falling film type evaporation not only has good oil return performance, and has more fabulous heat exchange property, the main performance both ways: the heat exchange area that has made full use of all efficient heat conducting tubes on the one hand; On the other hand when evaporating pressure is low, the hydrostatic column of liquid raises (local saturation pressure rising causes saturation temperature to raise) the saturated evaporating temperature in bottom in the flooded evaporator, heat transfer temperature difference reduces, and causes heat transfer property to descend, and then there is not this situation in jet spray falling film type evaporation.
In jet flow circulated sprinkling falling-film evaporator, cold-producing medium is through evenly spraying behind the distributor 13 in evaporation and heat-exchange tube bank 14, because heat-exchanging tube bundle 14 limited amounts, the cold-producing medium that part does not evaporate continue to deposit to the jet flow circulated sprinkling falling-film evaporator bottom with liquid form.From the liquid refrigerant of the high-pressure refrigerant injection jet flow circulated sprinkling falling-film evaporator of condenser 19 bottom, spray in the steam-generating bank through distributor 13 once more after mixing diffusion.Up to evaporation fully.The gaseous refrigerant of shwoot and directly send into compressor 20 air entries through gas-liquid separation membrane 12 in the jet pump 17 from top gas outlet 11 through the gaseous refrigerant of heat-exchanging tube bundle 14 evaporation.
Although invention has been described for the foregoing description, for the technical staff of the industry, still can do multiple variation to present embodiment, therefore, every employing similar variation of the present invention all should be listed protection scope of the present invention in.
Claims (3)
1. jet flow circulated sprinkling falling-film evaporator, comprise evaporator shell, be arranged on the gas vent on evaporator shell top, be disposed axially in heat-exchanging tube bundle, distributor, gas-liquid separation membrane in the evaporator shell, distributor is positioned at the heat-exchanging tube bundle top, and gas-liquid separation membrane is between distributor and gas vent, it is characterized in that, also comprise a jet pump, the inlet of the high-pressure refrigerant of this jet pump is communicated with condenser, the circulating refrigerant inlet is communicated with the evaporator shell bottom, and the mix refrigerant outlet is communicated with described distributor.
2. jet flow circulated sprinkling falling-film evaporator according to claim 1 is characterized in that, described jet pump is gas-liquid-liquid type dual-phase jet pump.
3. jet flow circulated sprinkling falling-film evaporator according to claim 1 is characterized in that, the inlet of the high-pressure refrigerant of described jet pump is communicated with condenser by a solenoid electric valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610118931 CN101191683B (en) | 2006-11-30 | 2006-11-30 | Jet flow circulated sprinkling falling-film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610118931 CN101191683B (en) | 2006-11-30 | 2006-11-30 | Jet flow circulated sprinkling falling-film evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101191683A CN101191683A (en) | 2008-06-04 |
| CN101191683B true CN101191683B (en) | 2010-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610118931 Expired - Fee Related CN101191683B (en) | 2006-11-30 | 2006-11-30 | Jet flow circulated sprinkling falling-film evaporator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914094A (en) * | 2012-09-27 | 2013-02-06 | 浙江盾安机电科技有限公司 | Heat exchanger and air conditioner with same |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101782301A (en) * | 2010-02-23 | 2010-07-21 | 林绍风 | Falling film type evaporator |
| CN102338512A (en) * | 2010-07-20 | 2012-02-01 | 上海柯茂机械有限公司 | Falling-film evaporator |
| CN102759225B (en) * | 2012-06-29 | 2014-08-20 | 西安交通大学 | Riser spiral-flow type falling-film evaporator for refrigerating air conditioner |
| CN102853575B (en) * | 2012-08-22 | 2015-02-18 | 南京五洲制冷集团有限公司 | Air source falling film water chiller-heater unit |
| CN103148626A (en) * | 2013-04-08 | 2013-06-12 | 天津商业大学 | Ultrahigh-rate liquid supply falling-film evaporative water chilling system |
| CN105518391B (en) * | 2013-09-06 | 2022-04-12 | 开利公司 | Integrated separator-distributor for falling film evaporator |
| CN104457040B (en) * | 2014-11-13 | 2017-09-22 | 广东申菱环境系统股份有限公司 | One kind spray downward film evaporator and its liquid level controlling method |
| CN104406334B (en) * | 2014-11-13 | 2017-08-11 | 广东申菱环境系统股份有限公司 | One kind spray downward film evaporator and its liquid level controlling method |
| CN107131687B (en) * | 2016-02-29 | 2023-07-11 | 约克（无锡）空调冷冻设备有限公司 | Heat exchange device suitable for low-pressure refrigerant |
| CN107367090A (en) * | 2016-05-12 | 2017-11-21 | 浙江盾安机电科技有限公司 | A kind of dripping type heat exchanger |
| CN107490212B (en) * | 2017-07-06 | 2019-07-05 | 南京师范大学 | A kind of Falling Film Evaporator of Horizontal Tube |
| CN107543338B (en) * | 2017-08-15 | 2020-08-04 | 重庆美的通用制冷设备有限公司 | Shell-and-tube evaporator and refrigerating unit |
| CN107860022B (en) * | 2017-11-28 | 2023-10-24 | 西安交通大学 | Variable flue section tubular air preheater |
| CN108362044A (en) * | 2018-05-17 | 2018-08-03 | 天津商业大学 | A kind of injection climbing film evaporator and its refrigeration system |
| JP2022085386A (en) * | 2020-11-27 | 2022-06-08 | 三菱重工サーマルシステムズ株式会社 | refrigerator |
| JP2022180058A (en) * | 2021-05-24 | 2022-12-06 | 三菱重工サーマルシステムズ株式会社 | Refrigerator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2704016Y (en) * | 2004-05-21 | 2005-06-08 | 余建华 | Vaporizor for refrigerator |
| JP2005241204A (en) * | 2004-02-27 | 2005-09-08 | Tokyo Electric Power Co Inc:The | Evaporator, heat pump, and heat utilization device |
| CN200982775Y (en) * | 2006-11-30 | 2007-11-28 | 上海海事大学 | Jet circulation spraying type falling film evaporator |
-
2006
- 2006-11-30 CN CN 200610118931 patent/CN101191683B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005241204A (en) * | 2004-02-27 | 2005-09-08 | Tokyo Electric Power Co Inc:The | Evaporator, heat pump, and heat utilization device |
| CN2704016Y (en) * | 2004-05-21 | 2005-06-08 | 余建华 | Vaporizor for refrigerator |
| CN200982775Y (en) * | 2006-11-30 | 2007-11-28 | 上海海事大学 | Jet circulation spraying type falling film evaporator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914094A (en) * | 2012-09-27 | 2013-02-06 | 浙江盾安机电科技有限公司 | Heat exchanger and air conditioner with same |
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| CN101191683A (en) | 2008-06-04 |
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Granted publication date: 20100414 Termination date: 20121130 |