CN102410773A - Liquid-distributing device for falling-film evaporator - Google Patents
Liquid-distributing device for falling-film evaporator Download PDFInfo
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- CN102410773A CN102410773A CN201010292587XA CN201010292587A CN102410773A CN 102410773 A CN102410773 A CN 102410773A CN 201010292587X A CN201010292587X A CN 201010292587XA CN 201010292587 A CN201010292587 A CN 201010292587A CN 102410773 A CN102410773 A CN 102410773A
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- liquid distributor
- film evaporator
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- falling film
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Abstract
The invention relates to a liquid-distributing device for a falling-film evaporator used for a refrigerating system. The liquid-distributing device comprises a liquid inlet pipe, a flow branching pool, a flow-guiding pipe, a porous liquid-distributing pipe and a packing tank, wherein the liquid inlet pipe is connected with the flow branching pool; the flow branching pool is connected with the flow-guiding pipe; the flow-guiding pipe is connected with the porous liquid-distributing pipe; the porous liquid-distributing pipe is arranged in the packing tank; and a plurality of liquid-distributing holes are formed on a base plate of the packing tank. The evenness of refrigerating fluid distribution is promoted by the liquid-distributing device provided by the invention, thereby being capable of evenly distributing refrigerating fluid along a radial direction and a length direction of a heat exchange pipe bundle, avoiding the generation of a local drying phenomenon, reducing a demand on horizontality during a mounting process of a refrigerating machine set, efficiently promoting a coefficient of heat transfer of the falling-film evaporator, saving space and capitalized cost, and achieving higher applicability.
Description
[technical field]
The present invention relates to field of air conditioning, refer in particular to the liquid distributor of the falling film evaporator that is used for refrigeration system.
[background technology]
The horizontal pipe falling film evaporation device has been used widely in industries such as chemical industry, petrochemical industry, desalinizations, but the application in refrigeration system is not also popularized.In recent years, because energy crisis and environmental problem are serious day by day, the efficient that improves refrigeration system has become the focus of concern.Falling film evaporator is as a kind of New Evaporator; Have higher heat exchange efficiency, small device volume, lower equipment cost, less refrigerant charge and good advantages such as oil return performance, it has application promise in clinical practice in refrigerated air-conditioning system.The inner main heat exchange mode of horizontal pipe falling film evaporation device is falling film evaporation; The refrigerant liquid that promptly flows into from the evaporimeter top washes away horizontal tube, outside its pipe, streams film forming, in managing, absorbs heat the circulated refrigerated water simultaneously; Produce gas at liquid-solid, liquid gas interface, make circulating frozen water for cooling in the pipe.Because all possibly undergo phase transition at liquid-solid, liquid gas interface, the heat transfer coefficient of falling film evaporation is very high.It is few that horizontal pipe falling film evaporation device and traditional flooded evaporator are compared filling quantity of refrigerant, and this has reduced the input and the maintenance cost of cold-producing medium on the one hand, also greatly reduces the leakage probability of cold-producing medium on the other hand, thereby makes the screening expanded range of cold-producing medium.
In the operation of horizontal pipe falling film evaporation device, cold-producing medium is evaporation outside pipe, evenly distributes along heat exchanger tube in order to make cold-producing medium, and makes cold-producing medium effective cloth film on the heating tube length direction, above heat-exchanging tube bundle, liquid distributor need be set.The structure of liquid distributor directly influences distribution of liquid and film forming quality, and liquid distribution device is one of critical component of horizontal pipe falling film evaporation device.There is part Study person that the cloth liquid mode and the device of horizontal pipe falling film evaporation device are studied both at home and abroad, however still few for the liquid distributor research of refrigeration system falling film evaporator.Liquid distributor commonly used at present has tangential cellular type, tangential slot type, slotted disc type, calandria etc., and these liquid distributors respectively have pluses and minuses, and the size of hole slot, quantity and uniformity all directly have influence on the quality of liquid distribution.Various in addition liquid distributors have the different separately scope of application, and certain limitation is arranged, and requirement on machining accuracy is also than higher.
Therefore, provide a kind of cloth liquid evenly, the easy liquid distributor of processing is real in necessary.
[summary of the invention]
The object of the present invention is to provide and a kind ofly can refrigerant liquid be evenly distributed to the liquid distributor on the horizontal pipe falling film evaporation organ pipe bundle.
For realizing the object of the invention, following technical scheme is provided:
The present invention is used for the liquid distributor of the falling film evaporator of refrigeration system; It comprises: feed tube, shunting pond, mozzle, porous liquid distributor, packing groove; This feed tube is connected with the shunting pond, and the shunting pond is connected with mozzle, and mozzle is connected with the porous liquid distributor; The porous liquid distributor places packing groove, and the base plate of packing groove has a plurality of liquid distributing holes.
This feed tube passes the top cover in shunting pond vertically downward, and its mouth of pipe vertical direction is higher than the base plate in said shunting pond.Preferably, this feed tube passes the top cover center in shunting pond vertically downward, and its mouth of pipe is the 1/4-1/2 of feed tube internal diameter with the distance of shunting pond base plate, and feed tube is welded to each other sealing with the top cover in shunting pond.
Said shunting pond be shaped as cuboid, longly be the width of liquid distributor, wide be 2-4 times of feed tube diameter, shunts pond thickness and equals the feed tube diameter.The shunting pond is positioned at the packing groove middle part, places above the packing groove and with packing groove and welds.
This mozzle passes the base plate in shunting pond vertically upward, is arranged in the both sides of feed tube, and the mouth of pipe of mozzle is lower than shunting pond top cover in vertical direction.Preferably, this mozzle symmetric arrays is in the both sides of feed tube, and its mouth of pipe is the 1/4-1/2 of its external diameter with the distance of shunting pond top cover, and the spacing of adjacent two mozzles of same row is 4-8 a times of its diameter.
The mouth of pipe of said mozzle has breach towards the outside, water conservancy diversion pond.Preferably, the breach of this mozzle is the del breach.The breach of this mozzle also can be other shapes.
Said porous liquid distributor places packing groove, and same porous liquid distributor communicates with two mozzles, and preferably, each porous liquid distributor is parallel in the packing groove, and the length of porous liquid distributor equals the length of packing groove, and diameter equals draft-tube diameter.
As preferred embodiment; The opening diameter of porous liquid distributor is 1-3mm, and position of opening is: to direction, begin from two side direction tops every 15-45 degree angular direction symmetric arrays by the pipe bottom at caliber; But angle is no more than 150 degree, promptly manages not perforate in the every side at least 30 degree angular ranges in top; At tube axial direction, the spacing of two rounds is 20-30mm, staggers each other in the axial aperture position of adjacent each pipe.
This packing groove thickness is 2-4 times of porous liquid distributor external diameter, and length equals falling film evaporator heat exchanger tube effective length, and width equals falling film evaporator tube bank diameter.Filler in this packing groove can be high molecular polymer of anti-fluorine the or metal structured packing.
The base plate of this packing groove, the aperture of liquid distributing hole are 1-3mm, and pitch of holes is 6-12mm, and adjacent liquid distributing hole is equilateral triangle and evenly distributes equal and opposite in direction.
Operation principle of the present invention is: liquid refrigerant flows into the shunting pond from feed tube; After liquid level reach a certain height, liquid flowed into liquid distributor through the del breach of mozzle, along with the increase of refrigerant flow; Liquid level raises; The liquid that flows into mozzle is just many more, until level stability, makes the liquid measure that is assigned to each liquid distributor even; Cold-producing medium in the liquid distributor flows into packing groove through aperture; Because the capillarity of filler; Cold-producing medium is able to even distribution in whole packing groove, when the cold-producing medium in the filler run up to a certain amount of after, cold-producing medium will overcome in the hole of surface tension effects by the packing groove base plate and flow out.
The present invention can be widely used in the horizontal tube downward film evaporator of all kinds of refrigeration systems.The present invention compared with prior art has the following advantages and effect:
Cold-producing medium in liquid distributor of the present invention by feed tube in the mozzle assigning process of both sides, through the del breach of mozzle, measure that resistance is bigger after a little while; Amount for a long time; Resistance is less, balance flow of refrigerant process resistance, improved the uniformity that cold-producing medium distributes.
2. device of the present invention adopts the porous liquid distributor to imbed packing groove cloth liquid, and cold-producing medium gets in the packing groove through the liquid distributing hole of liquid distributor; Because filler has capillary effect, has overcome the influence of gravity effect to cloth liquid process, can not only make cold-producing medium radially evenly distributing at heat-exchanging tube bundle with the tube bank length direction; Avoid the generation of local dry-out; And reduced of the requirement of refrigeration unit installation process to levelness, and effectively improve the heat transfer coefficient of falling film evaporator, save space and cost of investment.
3. device of the present invention, cloth liquid uniformity is high, and can design according to different refrigerants type and flow, has higher applicability.
[description of drawings]
Fig. 1 is the schematic appearance of apparatus of the present invention;
Fig. 2 is the cross sectional representation of apparatus of the present invention;
Fig. 3 is the enlarged drawing in I zone among Fig. 2;
Fig. 4 is the profile of A-A line among Fig. 2;
Fig. 5 is apparatus of the present invention agent structure sketch map;
Fig. 6 is an II regional enlarged drawing among Fig. 5;
Fig. 7 is apparatus of the present invention liquid distributor cross-sectional view.
[specific embodiment]
Its liquid distributor structure is like Fig. 1, shown in 2, and feed tube 1 is connected with shunting pond 2, and shunting pond 2 is connected with mozzle 4, and mozzle 4 is connected with porous liquid distributor 5, and porous liquid distributor 5 places packing groove 3.The base plate 6 of porous aggregate groove 3 as shown in Figure 3 has a plurality of liquid distributing holes 7.
Like Fig. 1, shown in 2, feed tube 1 diameter is 50mm, passes the top cover center in shunting pond 2 vertically downward, and its mouth of pipe is 15mm with the distance of shunting pond base plate.Feed tube 1 is welded to each other sealing with the top cover in shunting pond 2.
Like Fig. 1, shown in 2, shunt the cuboid that is shaped as in pond 2, long is 360mm, wide is 150mm, is 50mm deeply.Shunting pond 2 be positioned at packing groove 3 middle parts and place packing groove 3 tops and with packing groove 3 welding.
Like Fig. 2, shown in 4; Mozzle 4 passes the base plate in shunting pond vertically upward; Symmetric arrays is in the both sides of feed tube 1, and each manages diameter is 16mm, and mozzle 4 mouths of pipe are 5mm with the distance of shunting pond 2 top covers; The spacing of adjacent two mozzles of same row is 90mm, and the mouth of pipe of each mozzle has the del breach towards 2 outsides, water conservancy diversion pond.
Like Fig. 2, shown in 5, each porous liquid distributor 5 is parallel in the packing groove 3, and same porous liquid distributor communicates with 2 mozzles, and the length of porous liquid distributor is 2800mm, and diameter is 16mm.Like Fig. 6, shown in 7; Perforate 8 diameters of porous liquid distributor 5 are 1mm, and perforate 8 positions are: to direction, begin from both sides per 30 degree angular direction symmetric arrays settings by the pipe bottom at caliber; But angle is no more than 150 degree; In the present embodiment, the every side in pipe top has not perforate in the 60 degree angular ranges, thereby radially is being uniformly distributed with 9 holes altogether; At tube axial direction, the spacing of two rounds is 20-30mm, staggers each other in the axial aperture position of adjacent each pipe.
Filler in the packing groove 3 is the stainless steel structured packing, and the degree of depth of packing groove 3 is 40mm, and length is 2800mm, and width is 360mm.As shown in Figure 3, the base plate 6 of packing groove 3 has a plurality of liquid distributing holes 7, and liquid distributing hole 7 apertures are 1mm, and pitch of holes is 8mm, and adjacent liquid distributing hole 7 is equilateral triangle and evenly distributes equal and opposite in direction.
This liquid distributor course of work is: liquid refrigerant flows into the shunting pond 2 from feed tube 1; After liquid level reach a certain height, liquid flowed into liquid distributor 5 through the del breach of mozzle 4, along with the increase of refrigerant flow; Liquid level raises; The liquid that flows into mozzle 4 is just many more, until level stability, makes the liquid measure that is assigned to each liquid distributor 5 even; Cold-producing medium in the liquid distributor 5 flows into packing groove 3 through aperture; Because the capillarity of filler; Cold-producing medium is able to even distribution in whole packing groove 3, when the cold-producing medium in the filler run up to a certain amount of after, cold-producing medium will overcome surface tension effects by flowing out in the hole 7 of packing groove base plate 6.
The above is merely preferred embodiment of the present invention, and protection scope of the present invention is not limited thereto, and anyly all belongs within the protection domain of the present invention based on the equivalent transformation on the technical scheme of the present invention.
Claims (14)
1. liquid distributor that is used for the falling film evaporator of refrigeration system; It is characterized in that it comprises: feed tube, shunting pond, mozzle, porous liquid distributor, packing groove, this feed tube is connected with the shunting pond; The shunting pond is connected with mozzle; Mozzle is connected with the porous liquid distributor, and the porous liquid distributor places packing groove, and the base plate of packing groove has a plurality of liquid distributing holes.
2. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, this feed tube passes the top cover in shunting pond vertically downward, and its mouth of pipe is higher than the base plate in said shunting pond in vertical direction.
3. the liquid distributor of falling film evaporator as claimed in claim 2 is characterized in that, the said feed tube mouth of pipe is the 1/4-1/2 of its internal diameter with the distance of shunting pond base plate, and feed tube is welded to each other sealing with the top cover in shunting pond.
4. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, mozzle passes the base plate in shunting pond vertically upward, is arranged in the both sides of feed tube, and the mouth of pipe of mozzle is lower than shunting pond top cover in vertical direction.
5. the liquid distributor of falling film evaporator as claimed in claim 4 is characterized in that, this mozzle mouth of pipe is the 1/4-1/2 of its external diameter with the distance of shunting pond top cover, and the spacing of adjacent two mozzles of same row is 4-8 a times of its diameter.
6. the liquid distributor of falling film evaporator as claimed in claim 5 is characterized in that, the mouth of pipe of said mozzle has breach towards the outside, water conservancy diversion pond.
7. the liquid distributor of falling film evaporator as claimed in claim 6 is characterized in that, the breach of this mozzle is the del breach.
8. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, the thickness in said shunting pond equals the diameter of feed tube.
9. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, said porous liquid distributor places packing groove, and the diameter of porous liquid distributor equals draft-tube diameter.
10. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, this packing groove thickness is 2-4 times of porous liquid distributor external diameter, and length equals falling film evaporator heat exchanger tube effective length, and width equals falling film evaporator tube bank diameter.
11. the liquid distributor of falling film evaporator as claimed in claim 1; It is characterized in that said porous liquid distributor opening diameter is 1-3mm, position of opening is: at caliber to direction; Begin symmetric arrays by the pipe bottom, but angle is no more than 150 degree from every 15-45 degree angular direction, two side direction tops; At tube axial direction, the spacing of two rounds is 20-30mm, staggers each other in the axial aperture position of adjacent each pipe.
12. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, the filler in this packing groove can be high molecular polymer of anti-fluorine the or metal structured packing.
13. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, the aperture of a plurality of liquid distributing holes of this packing groove bottom is 1-3mm, and pitch of holes is 6-12mm.
14. the liquid distributor of falling film evaporator as claimed in claim 1 is characterized in that, the adjacent liquid distributing hole of this packing groove is equilateral triangle and evenly distributes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010292587 CN102410773B (en) | 2010-09-21 | 2010-09-21 | Liquid-distributing device for falling-film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010292587 CN102410773B (en) | 2010-09-21 | 2010-09-21 | Liquid-distributing device for falling-film evaporator |
Publications (2)
| Publication Number | Publication Date |
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| CN102410773A true CN102410773A (en) | 2012-04-11 |
| CN102410773B CN102410773B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010292587 Expired - Fee Related CN102410773B (en) | 2010-09-21 | 2010-09-21 | Liquid-distributing device for falling-film evaporator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512395A (en) * | 2013-10-24 | 2014-01-15 | 湖北壮志石化设备科技有限公司 | Square heat exchanger |
| CN106662414A (en) * | 2014-09-08 | 2017-05-10 | 三菱重工业株式会社 | Turbo refrigeration machine |
| CN107128989A (en) * | 2017-06-08 | 2017-09-05 | 江苏新奇环保有限公司 | A kind of low temperature and high concentration sewage disposal vaporization chamber liquid distributor |
| CN107166813A (en) * | 2017-05-31 | 2017-09-15 | 珠海格力电器股份有限公司 | Liquid distributor |
| CN107642922A (en) * | 2017-09-06 | 2018-01-30 | 同方节能装备有限公司 | A kind of crab shape structure drop leaching dissemination apparatus |
| CN108147488A (en) * | 2017-12-29 | 2018-06-12 | 天津梓煊浩柏科技有限公司 | Rubber accelerator CBS waste water purifying equipment |
| CN108826765A (en) * | 2018-08-22 | 2018-11-16 | 珠海格力电器股份有限公司 | Liquid distributor, downward film evaporator and air-conditioning |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159251Y (en) * | 1993-06-14 | 1994-03-23 | 徐尧润 | Liquid distributor with equalizing plate |
| WO2006044448A2 (en) * | 2004-10-13 | 2006-04-27 | York International Corporation | Falling film evaporator |
| CN101050899A (en) * | 2007-05-10 | 2007-10-10 | 上海交通大学 | Refrigerant distributor of compression refrigeration falling-film evaporator |
| CN201346403Y (en) * | 2009-01-07 | 2009-11-18 | 石家庄工大化工设备有限公司 | Liquid distributor for horizontal tube falling film evaporator |
| CN201551862U (en) * | 2009-10-28 | 2010-08-18 | 中国石油化工股份有限公司 | Liquid distribution device of falling film evaporator |
| CN201852512U (en) * | 2010-09-21 | 2011-06-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Liquid distributing device of falling film evaporator |
-
2010
- 2010-09-21 CN CN 201010292587 patent/CN102410773B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2159251Y (en) * | 1993-06-14 | 1994-03-23 | 徐尧润 | Liquid distributor with equalizing plate |
| WO2006044448A2 (en) * | 2004-10-13 | 2006-04-27 | York International Corporation | Falling film evaporator |
| CN101050899A (en) * | 2007-05-10 | 2007-10-10 | 上海交通大学 | Refrigerant distributor of compression refrigeration falling-film evaporator |
| CN201346403Y (en) * | 2009-01-07 | 2009-11-18 | 石家庄工大化工设备有限公司 | Liquid distributor for horizontal tube falling film evaporator |
| CN201551862U (en) * | 2009-10-28 | 2010-08-18 | 中国石油化工股份有限公司 | Liquid distribution device of falling film evaporator |
| CN201852512U (en) * | 2010-09-21 | 2011-06-01 | 珠海格力节能环保制冷技术研究中心有限公司 | Liquid distributing device of falling film evaporator |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103512395A (en) * | 2013-10-24 | 2014-01-15 | 湖北壮志石化设备科技有限公司 | Square heat exchanger |
| CN103512395B (en) * | 2013-10-24 | 2015-12-16 | 湖北壮志石化设备科技有限公司 | square heat exchanger |
| CN106662414A (en) * | 2014-09-08 | 2017-05-10 | 三菱重工业株式会社 | Turbo refrigeration machine |
| US10126028B2 (en) | 2014-09-08 | 2018-11-13 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Turbo chiller |
| CN107166813A (en) * | 2017-05-31 | 2017-09-15 | 珠海格力电器股份有限公司 | Liquid distributor |
| CN107166813B (en) * | 2017-05-31 | 2023-08-15 | 珠海格力电器股份有限公司 | Liquid distributor |
| CN107128989A (en) * | 2017-06-08 | 2017-09-05 | 江苏新奇环保有限公司 | A kind of low temperature and high concentration sewage disposal vaporization chamber liquid distributor |
| CN107642922A (en) * | 2017-09-06 | 2018-01-30 | 同方节能装备有限公司 | A kind of crab shape structure drop leaching dissemination apparatus |
| CN107642922B (en) * | 2017-09-06 | 2020-03-06 | 同方节能装备有限公司 | Crab-shaped structure dripping and sprinkling dispersion device |
| CN108147488A (en) * | 2017-12-29 | 2018-06-12 | 天津梓煊浩柏科技有限公司 | Rubber accelerator CBS waste water purifying equipment |
| CN108826765A (en) * | 2018-08-22 | 2018-11-16 | 珠海格力电器股份有限公司 | Liquid distributor, downward film evaporator and air-conditioning |
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