CN102759225A - Riser spiral-flow type falling-film evaporator for refrigerating air conditioner - Google Patents
Riser spiral-flow type falling-film evaporator for refrigerating air conditioner Download PDFInfo
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- CN102759225A CN102759225A CN2012102230723A CN201210223072A CN102759225A CN 102759225 A CN102759225 A CN 102759225A CN 2012102230723 A CN2012102230723 A CN 2012102230723A CN 201210223072 A CN201210223072 A CN 201210223072A CN 102759225 A CN102759225 A CN 102759225A
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Abstract
The invention discloses a riser spiral-flow type falling-film evaporator for a refrigerating air conditioner. The riser spiral-flow type falling-film evaporator comprises a shell, a refrigerant steam conveying pipe bundle, a falling-film evaporation pipe bundle, a damping hole plate and a spiral baffle plate, wherein the refrigerant steam conveying pipe bundle is arranged in the center in the shell and along the circumferential direction of the inner all of the shell, the falling-film evaporation pipe bundle is surrounded by the refrigerant steam conveying pipe bundle, the refrigerant steam conveying pipe bundle and the falling-film evaporation pipe bundle are both vertically arranged inside the shell, the upper part of an inlet of the falling-film evaporation pipe bundle is horizontally provided with the damping hole plate, the spiral baffle plate is fixed inside the shell and spirally arranged along a vertical direction, and is provided with through holes allowing the refrigerant steam conveying pipe bundle and the falling-film evaporation pipe bundle to pass through, an ejector is arranged between a refrigerant outlet pipe and a refrigerant inlet pipe, the inlet of the falling-film evaporation pipe bundle is provided with a flow guiding nozzle which has an outer diameter smaller than the inner diameter of the falling-film evaporation pipe bundle and is sealed at two ends, and the flow guiding nozzle is provided with a circular ring with three chutes formed along a circumferential direction uniformly. The riser spiral-flow type falling-film evaporator has the characteristics of small heat transfer temperature difference, high heat transfer coefficient, large evaporative power of unit area capable of preventing dry evaporation, low manufacture cost, less liquid holdup, small floor area and high safety.
Description
Technical field
The invention belongs to the refrigeration and air-conditioning technical field, relate to a kind of vertical pipe type falling film evaporator, particularly a kind of cooling air conditioner standpipe spiral-flow type falling film evaporator.
Background technology
Along with the fast development of Chinese national economy, the increasing demand of big-and-middle-sized refrigerating air conditioning device increases.Technical merit as cold (heat) water unit of big-and-middle-sized refrigerating air conditioning device improves constantly, and kind and output are on the increase.In handpiece Water Chilling Units, in centrifugal and screw-type water chiller, evaporimeter is the heat transmission equipment of a key in the system; Evaporimeter pattern in the past mainly is two kinds of flooded evaporator and dry evaporators, and wherein full-liquid type is used in the majority.In recent years, face under the background of severe environmental protection control requirement at high energy efficiency handpiece Water Chilling Units growth requirement and cold-producing medium, the application in the handpiece Water Chilling Units field receives concern and developmental research widely to downward film evaporator as a kind of heat transmission equipment efficiently.Compare with traditional flooded evaporator; Falling film evaporator is as a kind of evaporation equipment efficiently; The problem that the evaporating temperature that the no liquid static pressure causes raises; Have good heat-transfer, feature performance benefit such as evaporation intensity is big, heat exchange efficiency is high, equipment volume is less, equipment cost is lower, refrigerant charge is less and oil return property is good, have vast potential for future development in field of Refrigeration and Air-conditioning.
At present, for application and the research of downward film evaporator in the handpiece Water Chilling Units refrigeration system, focus mainly concentrates on the horizontal tube downward film evaporator.Through domestic and international many researchers' effort, aspects such as liquid film flow pattern, evaporation heat transfer mechanism and augmentation of heat transfer have obtained some theoretical results and correlation technique outside the liquid distribution method of horizontal tube downward film evaporator, tube bank arrangement, pipe.Yet; Because the application of horizontal tube downward film evaporator in refrigeration system still is in the exploratory stage; Still have many technical barriers to need to solve; As realize the liquid distribution trough version of even cloth liquid and the optimal design problem of evaporation tube geometry arrangement mode, and refrigerant flow is not enough and cause occurring the problem that dry blowing is sent out, and the influence of evaporation tube outer surface structure form heat exchanging and refrigerant gas stream are to the influence of liquid film disturbance etc.Therefore, to the further further investigation and the solution correlation technique problem of the problems referred to above, and develop new cooling air conditioner falling film evaporator for advancing the handpiece Water Chilling Units development of technology that active operation significance is arranged.
In fact, high because of its heat transfer coefficient as the vertical pipe type falling film evaporator of one of falling film evaporator type, the unit are evaporability is big; Cost is low; Liquid holdup is few, and floor space is few, wide accommodation; Be applicable to characteristics such as large-scale plant, be used widely and its application technology comparative maturity at industrial circles such as sky branch, chemical industry, pharmacy, food processing, desalinization, sewage disposals.Yet the vertical pipe type falling film evaporator awaits further to develop in the application of field of Refrigeration and Air-conditioning.The basic functional principle of vertical pipe type falling film evaporator is that the hydraulic fluid that is used for evaporating is distributed to each evaporation tube equably through liquid distribution trough; And make it be membranaceous to flow downward along inside pipe wall; Liquid film receives heating and the carburation by evaporation of tube wall, and the steam that produces can with the liquid film co-flow.Because the surface area of this evaporimeter vaporization is big; Under the little temperature difference, higher rate of heat transfer can be arranged; The pressure drop of evaporimeter is also very little, and simultaneously there is not the problem that effective heat transfer temperature difference of causing because of fluid pressure reduces in the vertical pipe type falling film evaporator, so it is suitable for use in the handpiece Water Chilling Units refrigeration system.The same with cooling horizontal tube downward film evaporator, the liquid that solves the vertical pipe type falling film evaporator is distribution, augmentation of heat transfer and avoid occurring dry blowing and problem such as send out evenly, is still the core technology of its development.
Summary of the invention
For solving defective or the deficiency that exists in the above-mentioned prior art, order of the present invention is to provide a kind of cooling air conditioner standpipe spiral-flow type falling film evaporator, and it is little to have a heat transfer temperature difference; Heat transfer coefficient is high; The unit are evaporability greatly also can be avoided dry blowing occurring and send out, and cost is low, and liquid holdup is few; Floor space is few, safe characteristics.
For achieving the above object, the technical scheme that the present invention adopted is:
A kind of cooling air conditioner standpipe spiral-flow type falling film evaporator; Comprise shell 1; Place shell 1 interior center and restrain 9 along the refrigerant vapour conveying of shell 1 inwall circumferential arrangement, carried the falling film evaporation of tube bank 9 encirclements to restrain 10 by refrigerant vapour, said refrigerant vapour conveying tube bank 9 is restrained 10 with falling film evaporation and all vertically is arranged in the shell 1; Falling film evaporation tube bank 10 inlet upper levels are provided with damping orifice plate 8; Also comprise being fixed on the inner helical baffles of vertically arranging in the shape of a spiral 14 of shell 1, have through hole on the said helical baffles 14, the through hole that refrigerant vapour carries tube bank 9 and falling film evaporation tube bank 10 to pass on the helical baffles 14.
Each falling film evaporation tube inlet is provided with the water conservancy diversion ozzle 11 of external diameter less than falling film evaporation bore and sealed at both ends in the said falling film evaporation tube bank 10, and water conservancy diversion ozzle 11 has the annulus 21 that circumferentially evenly has three skewed slots outside the edge.
Also comprise the injector 18 that is arranged between refrigerant outlet pipe 16 and the refrigerant inlet pipe 5.
The present invention compares with prior art, has following advantage:
1, owing to the helical baffles of vertically arranging in the shape of a spiral in shell 1 set inside 14; The through hole that refrigerant vapour carries tube bank 9 and falling film evaporation tube bank 10 to pass on the helical baffles 14; Make extratubal fluid present continuous helical flow, thereby guarantee distribution and the augmentation of heat transfer of fluid outside falling film evaporation tube bank 10;
2, each falling film evaporation tube inlet is provided with the water conservancy diversion ozzle 11 of external diameter less than falling film evaporation bore and sealed at both ends in falling film evaporation tube bank 10; Water conservancy diversion ozzle 11 has the annulus 21 that circumferentially evenly has three skewed slots outside the edge; Make liquid refrigerant pass through skewed slot and get in the falling film evaporation pipe, along inside pipe wall in the shape of a spiral wire flow downward, on inside pipe wall, form one deck cold-producing medium thin evaporated film well; Thereby strengthen the evaporimeter heat exchange property, reduce liquid holdup.
3, between refrigerant outlet pipe 16 and refrigerant inlet pipe 5, be connected with injector 18; Thereby come the unevaporated liquid refrigerant of recycle to increase the evaporator refrigerant circulating ratio through injector 18 injections; Guarantee the safe and effective operation of evaporimeter, save liquid pump wasted work simultaneously;
In a word; Standpipe spiral-flow type falling film evaporator of the present invention is simple in structure; The outer fluid cyclone mode helps improving the heat transfer property of evaporimeter in the pipe that is adopted, and required heat exchange area is little, thereby utilizes the injector injection to come the unevaporated liquid refrigerant of recycle to increase the evaporator refrigerant circulating ratio; Guarantee the safe and effective operation of evaporimeter, save energy consumption simultaneously.This standpipe spiral-flow type falling film evaporator economy, effectively, technical scheme is feasible, can be applied to field of Refrigeration and Air-conditioning, especially in the handpiece Water Chilling Units refrigeration system, thereby promotes the development of handpiece Water Chilling Units technology.
Description of drawings
Fig. 1 is standpipe spiral-flow type falling film evaporator structure of the present invention and circulation sketch map.
Fig. 2 arranges sketch map for tube bank in the standpipe spiral-flow type falling film evaporator of the present invention.
Fig. 3 arranges sketch map for the water conservancy diversion ozzle of falling film evaporation tube bank of the present invention and inlet thereof.
Fig. 4 is a water conservancy diversion ozzle sketch map of the present invention.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is done further explain.
As shown in Figure 1, a kind of cooling air conditioner standpipe of the present invention spiral-flow type falling film evaporator comprises shell 1; Place shell 1 interior center and restrain 9 along the refrigerant vapour conveying of shell 1 inwall circumferential arrangement, carried the falling film evaporation of tube bank 9 encirclements to restrain 10 by refrigerant vapour, said refrigerant vapour conveying tube bank 9 is restrained 10 with falling film evaporation and all vertically is arranged in the shell 1; The through hole that vertically has the helical baffles of arranging in the shape of a spiral 14, refrigerant vapour to carry tube bank 9 and falling film evaporation tube bank 10 to pass on the helical baffles 14 in shell 1 inside, upper perforated plate 3 is arranged on the upper and lower that refrigerant vapour is carried tube bank 9 and falling film evaporation tube bank 10 with lower perforated plate 4; On upper perforated plate 3 tops, steam pipeline bundle 9 outsides vertically are placed with overflow plate 6, the space that overflow plate 6 surrounds has constituted cold-producing medium groove 7, falling film evaporation tube bank 10 inlet upper levels are provided with damping orifice plate 8; Damping orifice plate 8 is fixed on overflow plate 6 waists; Refrigerant vapour outlet 2 is set at the evaporimeter top, and the bottom is provided with refrigerant outlet pipe 16, is provided with refrigerant inlet pipe 5 in the evaporimeter upper side; Refrigerant inlet pipe 5 is on upper perforated plate 3 tops; On shell 1 top water inlet pipe 12 is set, the bottom sets out water pipe 13, and the space of lower perforated plate 4 bottoms is a collecting tank 15; Refrigerant outlet pipe 16 is connected with collecting tank 15; Refrigerant outlet pipe 16 is connected by injection working medium inlet with injector 18, and the outlet of injector 18 mixed working fluids is connected with refrigerant inlet pipe 5 through float-controlled valve 17, and injector 18 injection working medium inlet connects condenser 19 outlets; Condenser 19 is connected with compressor 20, and compressor 20 is connected with refrigerant vapour outlet 2.
As shown in Figure 2; Carry a kind of arrangement of tube bank 9 and falling film evaporator tube bank 10 for refrigerant vapour in the cooling air conditioner standpipe spiral-flow type falling film evaporator of the present invention; Arrange with the triangle mode; Refrigerant vapour carrier pipe of evaporimeter center arrangement wherein, this refrigerant vapour carrier pipe plays the fixedly effect of helical baffles 14 simultaneously.
As shown in Figure 3, in the falling film evaporation tube bank 10 each falling film evaporation tube inlet be provided with external diameter less than falling film evaporation bore, sealed at both ends water conservancy diversion ozzle 11.
As shown in Figure 4, water conservancy diversion ozzle 11 has the annulus 21 that circumferentially evenly has three skewed slots outside the edge.
Operation principle of the present invention is: liquid refrigerant working medium flows into the space that overflow plates 6 and evaporator shell 1 are surrounded through refrigerant inlet pipe 5; Cold-producing medium overflows in the cold-producing medium groove 7 when the liquid refrigerant liquid level is higher than overflow plate 6 height; The damping action of damping orifice plate 8 can reduce the fluctuation of liquid refrigerant incoming flow in the cold-producing medium groove 7; Liquid refrigerant flows into damping orifice plate 8 lower space reposefully through the 8 even distributions of damping orifice plate; Thereby guarantee that liquid refrigerant can be assigned in the every falling film evaporation pipe of falling film evaporation tube bank 10 equably; Outside annulus 21 upper edges that liquid refrigerant has through water conservancy diversion ozzle 11 circumferentially equally distributed three skewed slots tangentially evenly flow in each falling film evaporation pipe of falling film evaporation tube bank 10; And in pipe, flow downward along inwall with zigzag shape; Can form one deck cold-producing medium thin evaporated film well in falling film evaporation pipe inside, the liquid refrigerant evaporation of in the process that flows downward, absorbing heat is not evaporated liquid refrigerant and is flowed out by the falling film evaporation pipe outlet of falling film evaporation tube bank 10 and concentrate in the collecting tank 15 of base of evaporator; The refrigerant vapour that the liquid refrigerant evaporation produces carries tube bank 9 to be transported to the evaporimeter upper space by refrigerant vapour, discharges through the steam outlet pipe 2 at evaporimeter top.Add hot water and restrain space outerpaces through water inlet pipe 12 entering from shell 1 top of falling film evaporator; Carry tube bank 9 and falling film evaporation to restrain 10 screw current downflow in helical baffles 14 effect of streaming around refrigerant vapour; Liquid refrigerant heat release in falling film evaporation tube bank 10 in the flow process is flowed out by outlet pipe 13 at last.Refrigerant vapour gets into compressor 20 and is compressed into high steam after steam outlet pipe 2 flows out; High steam after compression gets into condenser 19 and is condensed into high pressure liquid refrigerant; The high pressure liquid refrigerant of condenser 19 outlets gets into injector 18 injection working medium inlet; The unevaporated circulation low-pressure, liquid refrigerant of base of evaporator gets into injector 18 through refrigerant outlet pipe 16 and is entered the mouth by injection working medium; By the high pressure liquid refrigerant injection; In injector 18, mix supercharging with working fluid, the mixed working fluid of injector 18 outlets gets in the evaporimeter through refrigerant inlet pipe 5 through float-controlled valve 17 and participates in evaporation and heat-exchange, and the gaseous refrigerant that wherein shwoot goes out in the injector 18 injection processes carries the refrigerant vapour of tube bank 9 outputs together to flow out through the refrigerant vapour outlet 2 at evaporimeter top with refrigerant vapour in the evaporimeter.
Claims (3)
1. cooling air conditioner standpipe spiral-flow type falling film evaporator; Comprise shell (1); Place the interior center of shell (1) and carry tube bank (9) along the refrigerant vapour of shell (1) inwall circumferential arrangement; (10) are restrained in falling film evaporation by refrigerant vapour carries tube bank (9) to surround; Said refrigerant vapour carries tube bank (9) and falling film evaporation tube bank (10) all vertically to be arranged in the shell (1), and falling film evaporation tube bank (10) inlet upper level is provided with damping orifice plate (8), it is characterized in that: also comprise being fixed on the inner helical baffles of vertically arranging in the shape of a spiral (14) of shell (1); Said helical baffles has through hole on (14), and the through hole on the helical baffles (14) is passed in steam pipeline bundle (9) and falling film evaporation tube bank (10).
2. cooling air conditioner standpipe spiral-flow type falling film evaporator according to claim 1; It is characterized in that: each falling film evaporation tube inlet is provided with the water conservancy diversion ozzle (11) of external diameter less than falling film evaporation bore and sealed at both ends in the said falling film evaporation tube bank (10), and water conservancy diversion ozzle 11 has the annulus (21) that circumferentially evenly has three skewed slots outside the edge.
3. cooling air conditioner standpipe spiral-flow type falling film evaporator according to claim 1 and 2 is characterized in that: also comprise the injector (18) that is arranged between refrigerant outlet pipe (16) and the refrigerant inlet pipe (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210223072.3A CN102759225B (en) | 2012-06-29 | 2012-06-29 | Riser spiral-flow type falling-film evaporator for refrigerating air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210223072.3A CN102759225B (en) | 2012-06-29 | 2012-06-29 | Riser spiral-flow type falling-film evaporator for refrigerating air conditioner |
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| Publication Number | Publication Date |
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| CN102759225A true CN102759225A (en) | 2012-10-31 |
| CN102759225B CN102759225B (en) | 2014-08-20 |
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| CN201210223072.3A Expired - Fee Related CN102759225B (en) | 2012-06-29 | 2012-06-29 | Riser spiral-flow type falling-film evaporator for refrigerating air conditioner |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103263986A (en) * | 2013-06-02 | 2013-08-28 | 大连理工大学 | Horizontal pipe falling film evaporator liquid nozzle |
| CN103808170A (en) * | 2014-03-06 | 2014-05-21 | 苟仲武 | Self-circulation evaporation heat exchanger |
| CN103822409A (en) * | 2014-01-22 | 2014-05-28 | 浙江大学 | Falling film type heat exchanger with tubes in spiral arrangement |
| CN106152555A (en) * | 2015-04-21 | 2016-11-23 | 高树营 | The uninterrupted Heating heater of solar energy condensation board thermal-arrest |
| CN107490212A (en) * | 2017-07-06 | 2017-12-19 | 南京师范大学 | A kind of Falling Film Evaporator of Horizontal Tube |
| CN107551580A (en) * | 2017-09-14 | 2018-01-09 | 江苏必领能源科技有限公司 | A kind of vertical falling-film heat exchanger |
| CN108088123A (en) * | 2017-12-15 | 2018-05-29 | 珠海格力电器股份有限公司 | Liquid distribution plate structure, evaporator and air conditioner |
| CN109307441A (en) * | 2017-07-26 | 2019-02-05 | 日本化学机械制造株式会社 | Evaporator |
| CN112254379A (en) * | 2020-09-15 | 2021-01-22 | 南京师范大学 | Compound falling film evaporator and refrigerating device |
| CN112815357A (en) * | 2020-12-24 | 2021-05-18 | 北航（四川）西部国际创新港科技有限公司 | Flame tube structure of combustion chamber and combustion chamber |
| CN113035400A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Passive high-efficient heat exchanger of sparse membrane formula containment |
| CN113418955A (en) * | 2021-07-15 | 2021-09-21 | 中核坤华能源发展有限公司 | Vertical intraductal falling film evaporative condenser coefficient of heat transfer test system |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103263986A (en) * | 2013-06-02 | 2013-08-28 | 大连理工大学 | Horizontal pipe falling film evaporator liquid nozzle |
| CN103822409A (en) * | 2014-01-22 | 2014-05-28 | 浙江大学 | Falling film type heat exchanger with tubes in spiral arrangement |
| CN103808170A (en) * | 2014-03-06 | 2014-05-21 | 苟仲武 | Self-circulation evaporation heat exchanger |
| CN106152555A (en) * | 2015-04-21 | 2016-11-23 | 高树营 | The uninterrupted Heating heater of solar energy condensation board thermal-arrest |
| CN107490212B (en) * | 2017-07-06 | 2019-07-05 | 南京师范大学 | A kind of Falling Film Evaporator of Horizontal Tube |
| CN107490212A (en) * | 2017-07-06 | 2017-12-19 | 南京师范大学 | A kind of Falling Film Evaporator of Horizontal Tube |
| CN109307441A (en) * | 2017-07-26 | 2019-02-05 | 日本化学机械制造株式会社 | Evaporator |
| CN109307441B (en) * | 2017-07-26 | 2021-01-15 | 日本化学机械制造株式会社 | Evaporator with a heat exchanger |
| CN107551580A (en) * | 2017-09-14 | 2018-01-09 | 江苏必领能源科技有限公司 | A kind of vertical falling-film heat exchanger |
| CN108088123A (en) * | 2017-12-15 | 2018-05-29 | 珠海格力电器股份有限公司 | Liquid distribution plate structure, evaporator and air conditioner |
| CN112254379A (en) * | 2020-09-15 | 2021-01-22 | 南京师范大学 | Compound falling film evaporator and refrigerating device |
| CN112254379B (en) * | 2020-09-15 | 2021-12-07 | 南京师范大学 | Compound falling film evaporator and refrigerating device |
| CN112815357A (en) * | 2020-12-24 | 2021-05-18 | 北航（四川）西部国际创新港科技有限公司 | Flame tube structure of combustion chamber and combustion chamber |
| CN113035400A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Passive high-efficient heat exchanger of sparse membrane formula containment |
| CN113035400B (en) * | 2021-03-05 | 2023-01-03 | 哈尔滨工程大学 | Passive high-efficiency heat exchanger of sparse-membrane containment |
| CN113418955A (en) * | 2021-07-15 | 2021-09-21 | 中核坤华能源发展有限公司 | Vertical intraductal falling film evaporative condenser coefficient of heat transfer test system |
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Granted publication date: 20140820 Termination date: 20170629 |