CN104006580A - Falling-film evaporation device - Google Patents
Falling-film evaporation device Download PDFInfo
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- CN104006580A CN104006580A CN201410213967.8A CN201410213967A CN104006580A CN 104006580 A CN104006580 A CN 104006580A CN 201410213967 A CN201410213967 A CN 201410213967A CN 104006580 A CN104006580 A CN 104006580A
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- heat exchanger
- saturation state
- liquid
- exchanger tube
- cylindrical shell
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Abstract
The invention discloses a falling-film evaporation device. According to the falling-film evaporation device, heat exchange is achieved through evaporation and condensation of saturated liquid. A barrel is horizontally arranged. A plurality of heat exchange tubes are horizontally arranged on the lower middle portion inside the barrel in parallel. An evaporation coil is arranged on the upper portion of the barrel. A liquid distributor is installed between the evaporation coil and the topmost heat exchange tube. The several bottommost heat exchange tubes are immersed in the saturated liquid. The space, outside the saturated liquid, in the barrel is filled with saturated gas. The heat exchange tubes are filled with flowing secondary refrigerant. The evaporation coil servers as an evaporator of a refrigeration system and is filled with flowing refrigerant. The refrigerant is evaporated in the evaporation coil, lubricating oil directly flows back to a compressor along with the evaporated refrigerant, the saturated liquid does not contain the lubricating oil, no oil film is attached to the heat tubes, and therefore the heat transfer coefficient is increased. Meanwhile, no oil return device is needed, and therefore oil return of refrigeration system is simple.
Description
Technical field
The present invention relates to a kind of vaporising device, in particular, relate to a kind of falling film evaporation device that utilizes saturation state fluid evaporator and condensation to realize heat exchange.
Background technology
Horizontal falling film evaporator and flooded evaporator are widely used in air-conditioning and refrigeration system with the high feature of its heat exchange efficiency.The elevation of boiling point problem that horizontal falling film evaporator refrigerant charge is few, cause without hydrostatic head, but the refrigerant liquid that evaporation is not fallen will rely on canned motor pump to be promoted in the liquid distributor that is arranged on evaporimeter top, refrigerant liquid after lifting is realized falling film evaporation, but in circulation, refrigeration oil sinks to falling film evaporator bottom, need to oil return pipe be set separately and realize oil return; Flooded evaporator is that water lines is immersed in to refrigerant liquid inside, but refrigerant charge is many, has the elevation of boiling point problem causing due to hydrostatic head, and the refrigeration oil in evaporimeter also needs special pipeline to send compressor back to, oil return system complex structure.
Therefore,, no matter be horizontal falling film evaporator or flooded evaporator, there are system oil return problem and lubricating oil to participate in circulatory problems.For realizing system oil return, need optional equipment or system just can complete.And lubricating oil participates in circulation to affect the system coefficient of heat transfer be upper two kinds of inevitable problems of evaporimeter.
Summary of the invention
The present invention is in order to overcome defect of the prior art, and a kind of falling film evaporation device that utilizes saturation state fluid evaporator and condensation to realize heat exchange is provided.
The present invention is achieved through the following technical solutions:
A kind of falling film evaporation device, comprise cylindrical shell, liquid distributor, evaporation coil and Duo Gen heat exchanger tube, described cylindrical shell along continuous straight runs arranges, described many heat exchanger tube along continuous straight runs are arranged in parallel in the middle and lower part of described inner barrel, described evaporation coil is installed on the top of described cylindrical shell, between described evaporation coil and the heat exchanger tube of described top, described liquid distributor is installed, described in bottom which floor, heat exchanger tube immerses in saturation state liquid, the filled saturation state gas space in the described cylindrical shell outside described saturation state liquid in; Described many heat exchanger tubes inside is mobile refrigerating medium, and described evaporation coil is as the evaporimeter of refrigeration system, and what in described evaporation coil, flow is cold-producing medium; When cold-producing medium in described evaporation coil evaporates, the saturation state gas of described inner barrel becomes saturation state liquid in the condensation of described evaporation coil outer surface, condensed saturation state liquid is evenly distributed on many described heat exchanger tube outsides by described liquid distributor under Action of Gravity Field, absorbs and is evaporated to described cylindrical shell top after the inner refrigerating medium heat of described heat exchanger tube and continues condensation with falling liquid film form; Meanwhile, under the effect of pressure differential, described cylindrical shell bottom saturation state liquid absorption is immersed in refrigerating medium heat in the described heat exchanger tube in saturation state liquid, is evaporated to described cylindrical shell top and continues condensation; Lubricating oil in described cold-producing medium is got back to the compressor of refrigeration system with the cold-producing medium after evaporating.
The center line of the corresponding described many heat exchanger tubes of each perforate of described liquid distributor.
Heat exchanger tube in described immersion saturation state liquid is 1-3 layer.
The present invention has following technique effect:
1, falling film evaporator of the present invention is provided with the evaporation coil that is loaded with cold-producing medium in cylindrical shell, and fills saturation state liquid and saturation state gas in cylindrical shell.Because cold-producing medium is realized evaporation in evaporation coil, lubricating oil is directly got back to compressor with the cold-producing medium after evaporating, and in saturation state fluid, containing lubricating oil, is attached on heat exchanger tube without oil film, has improved heat transfer coefficient.In addition this device, in falling film evaporation, can be realized low hydrostatic head full-liquid type evaporation.Meanwhile, without adding any oil return apparatus, refrigeration system oil return is simple.
2, falling film evaporator inner barrel saturation state fluid of the present invention relies on phase-change heat transfer, and heat transfer rate is fast, and heat transfer temperature difference is little.
3, falling film evaporator of the present invention can utilize the condensation number of evaporation capacity control saturation state gas of evaporation coil inner refrigerant and the evaporation capacity of saturation state liquid, also controlled the heat dissipation capacity of refrigerating medium in heat exchanger tube, so be easy to control refrigerating medium outlet temperature simultaneously.
Brief description of the drawings
The schematic diagram of Fig. 1 falling film evaporation device of the present invention.
In figure: 1-coil pipe, 2-liquid distributor, 3-heat exchanger tube, 4-cylindrical shell.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments to the detailed description of the invention.
The schematic diagram of falling film evaporation device of the present invention as shown in Figure 1, comprise cylindrical shell 4, liquid distributor 2, evaporation coil 1 and Duo Gen heat exchanger tube 3, described cylindrical shell 4 along continuous straight runs settings, described many heat exchanger tubes 3 along continuous straight runs are arranged in parallel in the middle and lower part of described cylindrical shell 4 inside, described evaporation coil 1 is installed on the top of described cylindrical shell 4, described liquid distributor 2 is installed between described evaporation coil 1 and the heat exchanger tube of described top, described in bottom which floor, heat exchanger tube immerses in saturation state liquid, in space in described cylindrical shell 4 outside described saturation state liquid, fill saturation state gas.In the present embodiment, the heat exchanger tube 3 in described immersion saturation state liquid is preferably 1-3 layer.Described many heat exchanger tubes 3 inside are mobile refrigerating medium, and described evaporation coil 1 is as the evaporimeter of refrigeration system, described evaporation coil 1 interior mobile be cold-producing medium, cold-producing medium is at the interior evaporation endothermic of evaporation coil 1.When cold-producing medium in described evaporation coil 1 evaporates, the saturation state gas of described cylindrical shell 4 inside becomes saturation state liquid in described evaporation coil 1 outer surface condensation, condensed saturation state liquid is evenly distributed on many described heat exchanger tube 3 outsides by described liquid distributor 2 under Action of Gravity Field, absorbs and is evaporated to described cylindrical shell 4 tops after the inner refrigerating medium heat of described heat exchanger tube 3 and continues condensations with falling liquid film form.Meanwhile, under the effect of pressure differential, described cylindrical shell 4 bottom saturation state liquid absorptions are immersed in the refrigerating medium heat in the described heat exchanger tube 3 in saturation state liquid, are evaporated to described cylindrical shell 4 tops and continue condensation; Lubricating oil in described cold-producing medium is got back to the compressor of refrigeration system with the cold-producing medium after evaporating.
In order to improve heat exchange efficiency, the center line of the corresponding described many heat exchanger tubes 3 of each perforate of described liquid distributor 2.
The characteristic of saturation state fluid is that temperature is corresponding one by one with pressure, utilize this characteristic, by adjusting the evaporation capacity of evaporation coil 1 inner refrigerant, can control the pressure and temperature of the interior saturation state fluid of cylindrical shell 4, can adjust the outlet temperature of heat exchanger tube 3 interior refrigerating mediums.In the time that evaporation coil 1 inner refrigerant stops evaporating, the no longer condensation of the interior saturation state gas of cylindrical shell 4, saturation state liquid is no longer heat absorption evaporation also.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. a falling film evaporation device, it is characterized in that, comprise cylindrical shell, liquid distributor, evaporation coil and Duo Gen heat exchanger tube, described cylindrical shell along continuous straight runs arranges, described many heat exchanger tube along continuous straight runs are arranged in parallel in the middle and lower part of described inner barrel, described evaporation coil is installed on the top of described cylindrical shell, between described evaporation coil and the heat exchanger tube of described top, described liquid distributor is installed, described in bottom which floor, heat exchanger tube immerses in saturation state liquid, the filled saturation state gas space in the described cylindrical shell outside described saturation state liquid in; Described many heat exchanger tubes inside is mobile refrigerating medium, and described evaporation coil is as the evaporimeter of refrigeration system, and what in described evaporation coil, flow is cold-producing medium; When cold-producing medium in described evaporation coil evaporates, the saturation state gas of described inner barrel becomes saturation state liquid in the condensation of described evaporation coil outer surface, condensed saturation state liquid is evenly distributed on many described heat exchanger tube outsides by described liquid distributor under Action of Gravity Field, absorbs and is evaporated to described cylindrical shell top after the inner refrigerating medium heat of described heat exchanger tube and continues condensation with falling liquid film form; Meanwhile, under the effect of pressure differential, described cylindrical shell bottom saturation state liquid absorption is immersed in refrigerating medium heat in the described heat exchanger tube in saturation state liquid, is evaporated to described cylindrical shell top and continues condensation; Lubricating oil in described cold-producing medium is got back to the compressor of refrigeration system with the cold-producing medium after evaporating.
2. falling film evaporation device according to claim 1, is characterized in that, the center line of the corresponding described many heat exchanger tubes of each perforate of described liquid distributor.
3. falling film evaporation device according to claim 1, is characterized in that, the heat exchanger tube in described immersion saturation state liquid is 1-3 layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213967.8A CN104006580A (en) | 2014-05-21 | 2014-05-21 | Falling-film evaporation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410213967.8A CN104006580A (en) | 2014-05-21 | 2014-05-21 | Falling-film evaporation device |
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| Publication Number | Publication Date |
|---|---|
| CN104006580A true CN104006580A (en) | 2014-08-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410213967.8A Pending CN104006580A (en) | 2014-05-21 | 2014-05-21 | Falling-film evaporation device |
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| CN (1) | CN104006580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504721A (en) * | 2016-06-14 | 2017-12-22 | 青岛海尔智能技术研发有限公司 | Multilayer flooded evaporator and refrigeration, air-conditioning system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026290A (en) * | 1983-07-25 | 1985-02-09 | Ebara Corp | Waste heat recovery device |
| CN1124841A (en) * | 1994-12-14 | 1996-06-19 | 中国纺织大学 | Separated phase transition heat apparatus and technique for recovering low-temp. waste heat using azeotrope as medium |
| US6026889A (en) * | 1998-06-18 | 2000-02-22 | Joseph Oat Corporation | Single shell boiler |
| CN1743782A (en) * | 2004-09-02 | 2006-03-08 | 徐宝安 | Two-way heat transfer heat pipe |
| CN203940663U (en) * | 2014-05-21 | 2014-11-12 | 天津商业大学 | Falling film evaporation device |
-
2014
- 2014-05-21 CN CN201410213967.8A patent/CN104006580A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6026290A (en) * | 1983-07-25 | 1985-02-09 | Ebara Corp | Waste heat recovery device |
| CN1124841A (en) * | 1994-12-14 | 1996-06-19 | 中国纺织大学 | Separated phase transition heat apparatus and technique for recovering low-temp. waste heat using azeotrope as medium |
| US6026889A (en) * | 1998-06-18 | 2000-02-22 | Joseph Oat Corporation | Single shell boiler |
| CN1743782A (en) * | 2004-09-02 | 2006-03-08 | 徐宝安 | Two-way heat transfer heat pipe |
| CN203940663U (en) * | 2014-05-21 | 2014-11-12 | 天津商业大学 | Falling film evaporation device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504721A (en) * | 2016-06-14 | 2017-12-22 | 青岛海尔智能技术研发有限公司 | Multilayer flooded evaporator and refrigeration, air-conditioning system |
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Application publication date: 20140827 |