CN206449940U - Falling-film heat exchanger - Google Patents
Falling-film heat exchanger Download PDFInfo
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- CN206449940U CN206449940U CN201621420568.XU CN201621420568U CN206449940U CN 206449940 U CN206449940 U CN 206449940U CN 201621420568 U CN201621420568 U CN 201621420568U CN 206449940 U CN206449940 U CN 206449940U
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Abstract
The utility model discloses a kind of falling-film heat exchanger, including vertical cylinder, two groups of heat-exchange tube groups and multiple distribution plates；The top of the vertical cylinder is provided with feed tube and air intake duct, and the heat-exchange tube group includes offering multiple through holes on many heat exchanger tubes, the distribution plate；Multiple distribution plates are from top to bottom horizontally set in the vertical cylinder successively, and the heat exchanger tube is arranged and is inserted in the corresponding through hole vertically, and gap is formed between the heat exchanger tube and the through hole；Main air flow passage is formed between the inwall of the vertical cylinder and the heat-exchange tube group, heat-exchange tube group described in two groups between two adjacent distribution plates is arranged at intervals to form auxiliary flow path, and the liquid outlet of the feed tube is located at the top of the distribution plate of topmost.Realize the heat exchange efficiency for improving falling-film heat exchanger.
Description
Technical field
The utility model is related to air-conditioning equipment, more particularly to a kind of falling-film heat exchanger.
Background technology
At present, heat exchanger is conventional heat-exchanger rig, is widely used in air-conditioning equipment.Falling-film heat exchanger is because of heat exchange
Performance is higher, it is stable the advantages of（Structure is shown in Chinese patent notification number CN204214172U）, obtained in refrigeration, field of air conditioning
Extensive use.Existing falling-film heat exchanger typically uses horizontal type structure, the horizontal positioned such as cylinder, heat exchanger tube, on cylinder
The distributor that portion is made up of multilayer distribution plate sprays the refrigerant of gas-liquid two-phase on the heat-exchanging tube bundle of horizontal positioned, in level
Convective boiling and surface evaporation heat exchange outside chilled water generator tube in the pipe surface that exchanges heat formation liquid film, with heat exchanger tube.Due to using
Gas-liquid two-phase distributor, refrigerant is difficult to evenly distribute on heat-exchanging tube bundle, the liquid refrigeration distributed on the heat exchanger tube caused
Agent is more, and some distribution are lacked, and some distribution reduce heat exchange efficiency less than liquid refrigerant；Refrigerant is exchanged heat by top
Pipe is drenched in flow process to bottom heat exchanger tube drop, with the evaporation of liquid refrigerant, and refrigerant flow is reduced, bottom heat exchanger tube table
The problem of face liquid refrigerant distribution is uneven is more serious so that bottom heat exchanger tube surface distribution is also made less than liquid refrigerant
Into the decline of heat exchange efficiency；In addition, liquid refrigerant spray on horizontal heat exchange tube, liquid film heat exchange pipe surface flow velocity compared with
It is small, also exchange the thermal efficiency and have a negative impact.How to design a kind of high falling-film heat exchanger of heat exchange efficiency is the utility model
Technical problem to be solved.
Utility model content
The utility model provides a kind of falling-film heat exchanger, realizes the heat exchange efficiency for improving falling-film heat exchanger.
To reach above-mentioned technical purpose, the utility model is realized using following technical scheme：
A kind of falling-film heat exchanger, including vertical cylinder, two groups of heat-exchange tube groups and multiple distribution plates；The vertical cylinder
Top be provided with feed tube and air intake duct, the heat-exchange tube group includes offering on many heat exchanger tubes, the distribution plate many
Individual through hole；Multiple distribution plates are from top to bottom horizontally set in the vertical cylinder successively, and the heat exchanger tube is arranged vertically
And be inserted in the corresponding through hole, form gap between the heat exchanger tube and the through hole；The inwall of the vertical cylinder with
Heat-exchange tube group described in two groups formed between the heat-exchange tube group between main air flow passage, two adjacent distribution plates
Interval setting forms auxiliary flow path, and the liquid outlet of the feed tube is located at the top of the distribution plate of topmost.
Further, the feed tube is located between heat-exchange tube group described in two groups.
Further, multiple liquid outlets are offered on the feed tube.
Further, the internal diameter of the through hole is 1.1~1.5 times of the external diameter of the heat exchanger tube.
Further, the external diameter of multiple distribution plates from top to bottom gradually increases.
Further, the edge of the distribution plate forms the turnup structure of annular.
Compared with prior art, advantage of the present utility model and good effect are：By using vertical cylinder so that heat exchange
The vertical arrangement of pipe, and liquid phase refrigerant is distributed step by step by multiple distribution plates, it is ensured that liquid phase refrigerant is evenly distributed so that heat exchange
The outer surface of pipe forms uniform liquid film, and heat exchanger tube is to be disposed vertically, and liquid film is larger in the flow velocity of heat exchange pipe surface, and convection current is changed
Heat is strengthened, and effectively raises heat exchange efficiency；Meanwhile, the outside setting main air flow passage of heat-exchange tube group, and two heat
Auxiliary flow path is formed between exchange pipe group, gaseous refrigerant part of the liquid film after heat exchanger tube surface evaporation directly passes through master
Gas channel flows out into air intake duct, and the gaseous refrigerant after the heat exchanger tube surface evaporation on the inside of heat-exchange tube group passes through
Auxiliary flow path is flowed rapidly in main air flow passage, effectively prevent to form high flow velocities because air-flow is converged between heat-exchanging tube bundle
The liquid film for the pipe surface that exchanges heat is blown off, it is ensured that liquid film can flow along heat exchanger tube surface-stable, be more beneficial for improving heat exchange efficiency.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are
Some embodiments of the present utility model, for those of ordinary skill in the art, are not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the front view of the utility model finned heat exchanger embodiment；
Fig. 2 is the side view of the utility model finned heat exchanger embodiment；
Fig. 3 be in Fig. 2 A-A to sectional view；
Fig. 4 is B-B direction sectional view in Fig. 2.
Reference：Vertical cylinder 1, heat exchanger tube 2, air intake duct 3, upper perforated plate 4, lower perforated plate 5, upper tube box 6, lower tube box 7, enter
Liquid pipe 8, distribution plate 9, water inlet pipe 10, outlet pipe 11, main air flow passage 12, auxiliary flow path 13, liquid outlet 14, through hole 15.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer
Accompanying drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that retouched
The embodiment stated is a part of embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made is belonged to
The scope of the utility model protection.
As Figure 1-Figure 4, the present embodiment falling-film heat exchanger, including vertical cylinder 1, two groups of heat-exchange tube groups, air-breathings
Pipe 3, upper perforated plate 4, lower perforated plate 5, upper tube box 6, lower tube box 7, feed tube 8, distribution plate 9, water inlet pipe 10, outlet pipe 11, wherein, stand
The two ends of formula cylinder 1 connect upper perforated plate 4 and lower perforated plate 5, the connection upper tube box 6 of upper perforated plate 4, the connection lower tube box 7 of lower perforated plate 5, water inlet pipe
10 and outlet pipe 11 be connected with upper tube box 6, air intake duct 3 and feed tube 8 are connected to the top of vertical cylinder 1.Heat-exchange tube group bag
Include and offer multiple through holes 15 on many heat exchanger tubes 2, the distribution plate 9；From top to bottom level is set multiple distribution plates 9 successively
Put in the vertical cylinder 1, the heat exchanger tube 2 is arranged and is inserted in the corresponding through hole 15 vertically, the heat exchanger tube 2 with
Gap is formed between the through hole 15；Main air flow passage is formed between the inwall of the vertical cylinder 1 and the heat-exchange tube group
12, heat-exchange tube group described in two groups between two adjacent distribution plates 9 is arranged at intervals to form auxiliary flow path 13, institute
The liquid outlet 14 of feed tube 8 is stated positioned at the top of the distribution plate 9 of topmost.
Specifically, the present embodiment falling-film heat exchanger uses vertical structure, and gas-liquid two-phase cold-producing medium is entered by feed tube 8
Vertical cylinder 1, then the multiple liquid outlets 14 opened up by the bottom of feed tube 8 are sprayed in the superiors' distribution plate 9, wherein, gas-liquid
Vapor phase refrigerant in two-phase enters main air flow passage 12 by the gap between auxiliary flow path 13 and each heat exchanger tube 2, so
Enter air intake duct 3 afterwards；Liquid phase refrigerant in gas-liquid two-phase enters after distribution plate 9, and certain liquid level, liquid are formed in distribution plate 9
Annular gap outflow between through hole 15 and heat exchanger tube 2 that state refrigerant is tried to get to the heart of a matter by distribution plate 9, in the outer surface shape of heat exchanger tube 2
Into liquid film.Liquid film occurs convective boiling with the chilled water in heat exchanger tube 2 and surface evaporation exchanges heat.Liquid film edge in evaporation process is changed
Heat pipe outer surface is flowed downward, into next Layer assignment disk 9, and liquid refrigerant is redistributed in distribution plate 9, then by dividing
Annular gap outflow between the through hole 15 and heat exchanger tube 2 tried to get to the heart of a matter with disk 9, liquid film, liquid film are formed in the outer surface of heat exchanger tube 2 again
Exchange heat and flow downward with the chilled water generation convective boiling in heat exchanger tube 2 and surface evaporation, be again introduced into next Layer assignment disk 9
Redistribute.Such liquid refrigerant repeated dispensing in each Layer assignment disk 9, liquid film exchanges heat in each surface layer-by-layer of layer heat exchanger tube 2.
Finally, unevaporated liquid refrigerant enters orlop heat exchanger tube 2, and forms certain liquid level, and the top of this part heat exchanger tube 2 is
Liquid film convective boiling and surface evaporation heat exchange, bottom is the Pool Boiling Heat Transfer of similar full-liquid type heat exchanger.Each surface of layer heat exchanger tube 2
Gap between auxiliary flow path 13 and heat exchanger tube 2 that the gaseous refrigerant that evaporation is produced passes through each layer enters main air flow passage
12, flowed up along main air flow passage 12, finally from the outflow heat exchanger of air intake duct 3.Gas-liquid two-phase cold-producing medium is sprayed by liquid outlet 14
After being sprinkled upon in the superiors' distribution plate 9, vapor phase refrigerant is separated, and only liquid phase refrigerant is allocated in distribution plate 9,
It is uniformly more to the distribution of refrigerant than gas-liquid two-phase distributor in existing downward film evaporator.In addition, liquid refrigerant is logical
The outflow of the surface of heat exchanger tube 2 is close in the annular gap crossed between the through hole 15 and heat exchanger tube 2 that distribution plate 9 tries to get to the heart of a matter, and is easier changing
The outer surface of heat pipe 2 forms uniform liquid film, improves heat exchange efficiency.Liquid refrigerant is after the distribution of the superiors' distribution plate 9, and liquid film exists
During the surface evaporation of heat exchanger tube 2 exchanges heat and flowed downward, because temperature, the speed of chilled water in each heat exchanger tube 2 are variant,
Cause the evaporation capacity of each surface refrigerant of heat exchanger tube 2 different, the liquid film of heat exchanger tube 2 liquid during flowing downward more than evaporation capacity
Film is gradually thinned, or even is evaporated entirely, if liquid refrigerant is not redistributed, and the heat exchange property of this part heat exchanger tube will be disliked
Change, reduce heat exchange efficiency.Therefore, distribution plate 9 is set again in lower floor, is dividing the liquid refrigerant that each heat exchanger tube 2 in upper strata is flowed into
Redistributed with disk 9 so that the thickness of liquid film of heat exchange pipe surface of the Layer assignment disk below 9 is evenly distributed, it is to avoid part is changed
The surface of heat pipe 2 is evaporated so that the problem of heat exchange property deteriorates.So, redistributing by each Layer assignment disk 9 so that each layer is changed
The surface liquid film distribution of heat pipe 2 is more uniform, significantly improves heat exchange efficiency.
Further, in order to evenly distribute liquid phase refrigerant, the feed tube 8 be located at heat-exchange tube group described in two groups it
Between, multiple liquid outlets 14 are offered on the feed tube 8, further to evenly distribute liquid phase refrigerant.Wherein, it is described
The internal diameter of through hole 15 is 1.1~1.5 times of the external diameter of the heat exchanger tube 2, it can be ensured that liquid phase refrigerant can be smoothly along changing
The flow downwards of heat pipe 2.In addition, the external diameter of multiple distribution plates 9 from top to bottom gradually increases, using external diameter by upper
The mode gradually increased under, when liquid phase refrigerant that can be up in distribution plate 9 crosses multi-overflow, the distribution plate 9 by lower section
Catch.It is preferred that, the edge of the distribution plate 9 forms the turnup structure of annular, a certain amount of to ensure to hold in distribution plate 9
Liquid phase refrigerant.
Compared with prior art, advantage of the present utility model and good effect are：By using vertical cylinder so that heat exchange
The vertical arrangement of pipe, and liquid phase refrigerant is distributed step by step by multiple distribution plates, it is ensured that liquid phase refrigerant is evenly distributed so that heat exchange
The outer surface of pipe forms uniform liquid film, and heat exchanger tube is to be disposed vertically, and liquid film is larger in the flow velocity of heat exchange pipe surface, and convection current is changed
Heat is strengthened, and effectively raises heat exchange efficiency；Meanwhile, the outside setting main air flow passage of heat-exchange tube group, and two heat
Auxiliary flow path is formed between exchange pipe group, gaseous refrigerant part of the liquid film after heat exchanger tube surface evaporation directly passes through master
Gas channel flows out into air intake duct, and the gaseous refrigerant after the heat exchanger tube surface evaporation on the inside of heat-exchange tube group passes through
Auxiliary flow path is flowed rapidly in main air flow passage, effectively prevent to form high flow velocities because air-flow is converged between heat-exchanging tube bundle
The liquid film for the pipe surface that exchanges heat is blown off, it is ensured that liquid film can flow along heat exchanger tube surface-stable, be more beneficial for improving heat exchange efficiency.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：
It can still modify to the technical scheme described in foregoing embodiments, or which part technical characteristic is carried out etc.
With replacement；And these modifications or replacement, the essence of appropriate technical solution is departed from the utility model embodiment technology
The spirit and scope of scheme.
Claims (6)
1. a kind of falling-film heat exchanger, it is characterised in that including vertical cylinder, two groups of heat-exchange tube groups and multiple distribution plates；Institute
The top for stating vertical cylinder is provided with feed tube and air intake duct, and the heat-exchange tube group includes many heat exchanger tubes, the distribution plate
On offer multiple through holes；Multiple distribution plates are from top to bottom horizontally set in the vertical cylinder successively, the heat exchange
Pipe is arranged and is inserted in the corresponding through hole vertically, and gap is formed between the heat exchanger tube and the through hole；The vertical cylinder
Described in two groups formed between the inwall of body and the heat-exchange tube group between main air flow passage, two adjacent distribution plates
Heat-exchange tube group is arranged at intervals to form auxiliary flow path, and the liquid outlet of the feed tube is located at the distribution plate of topmost
Top.
2. falling-film heat exchanger according to claim 1, it is characterised in that the feed tube is located at heat exchange described in two groups
Between pipe group.
3. falling-film heat exchanger according to claim 1, it is characterised in that offered on the feed tube it is multiple it is described go out
Liquid mouthful.
4. falling-film heat exchanger according to claim 1, it is characterised in that the internal diameter of the through hole is the heat exchanger tube
1.1~1.5 times of external diameter.
5. falling-film heat exchanger according to claim 1, it is characterised in that the external diameter of multiple distribution plates is from top to bottom
Gradually increase.
6. according to any described falling-film heat exchangers of claim 1-5, it is characterised in that the edge formation ring of the distribution plate
The turnup structure of shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621420568.XU CN206449940U (en) | 2016-12-23 | 2016-12-23 | Falling-film heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621420568.XU CN206449940U (en) | 2016-12-23 | 2016-12-23 | Falling-film heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN206449940U true CN206449940U (en) | 2017-08-29 |
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ID=59673706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621420568.XU Active CN206449940U (en) | 2016-12-23 | 2016-12-23 | Falling-film heat exchanger |
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| Country | Link |
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| CN (1) | CN206449940U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109855332A (en) * | 2017-11-30 | 2019-06-07 | 杭州三花家电热管理系统有限公司 | Heat-exchanging component and heat-exchange system |
| CN112146504A (en) * | 2019-06-26 | 2020-12-29 | 珠海格力电器股份有限公司 | Tube plate structure capable of reducing resistance and air conditioning unit |
-
2016
- 2016-12-23 CN CN201621420568.XU patent/CN206449940U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109855332A (en) * | 2017-11-30 | 2019-06-07 | 杭州三花家电热管理系统有限公司 | Heat-exchanging component and heat-exchange system |
| CN112146504A (en) * | 2019-06-26 | 2020-12-29 | 珠海格力电器股份有限公司 | Tube plate structure capable of reducing resistance and air conditioning unit |
| CN112146504B (en) * | 2019-06-26 | 2022-01-28 | 珠海格力电器股份有限公司 | Tube plate structure capable of reducing resistance and air conditioning unit |
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