CN103062962B - Gas-liquid separative falling film type evaporator - Google Patents
Gas-liquid separative falling film type evaporator Download PDFInfo
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- CN103062962B CN103062962B CN201210580823.7A CN201210580823A CN103062962B CN 103062962 B CN103062962 B CN 103062962B CN 201210580823 A CN201210580823 A CN 201210580823A CN 103062962 B CN103062962 B CN 103062962B
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Abstract
The invention discloses a gas-liquid separative falling film type evaporator which comprises a distributor and the distributor comprises a baffle, a pressure case and a gravity case which is provided with the pressure case; first through holes are uniformly arranged at the bottom of the gravity case and a plurality of clapboards are arranged at the bottom of the gravity case along the transverse direction; gaps are formed on the periphery of the pressure case and the periphery of the gravity case; second through holes are uniformly arranged on the top of the pressure case; the baffle is arranged above the pressure case, the two lateral sides of the baffle are fixedly arranged on the gravity case, a pore plate which is provided with a cover plate is arranged at the edge of the baffle and gaps are formed between the pore plate and the cover plate to form an air outlet groove; and an inlet pipe which is communicated with the pressure case is arranged on the baffle. The gas-liquid separative falling film type evaporator distributes refrigerant working medium through the combination of pressure potential energy and gravity potential energy, and accordingly has the advantages of being uniform in liquid separation, high in reliability, avoiding the splash and leakage of refrigerant working medium, being low in pressure loss, fully exerting the performance superiority, enabling the refrigerant working medium and a heat exchange pipe group to be fully contacted and greatly improving the evaporating efficiency.
Description
Technical field
The present invention relates to a kind of evaporimeter, refer to a kind of gas-liquid separation downward film evaporator particularly.
Background technology
In the course of work of gas-liquid separation downward film evaporator, carry the high temperature condensed fluid of coming by becoming the fluid-mixing of cryogenic liquid and cryogenic gas after throttling arrangement throttling expansion from condenser, then, fluid-mixing enters the distributor in downward film evaporator, drip as required and pour on heat exchanger tube, cold is passed to user, after self is evaporated, enter the air entry of compressor, after compression, enter condenser.At present, existing evaporimeter in above process, easily produces interference between gas-liquid two-phase, often there is the problem of gas-liquid separation difficulty, the larger obstruction of gas passage existence; In addition, the uniform distribution of refrigerant medium is the basis that each parts of evaporimeter can well run, and in current downward film evaporator, the distributed uniform degree of refrigerant medium is still not ideal enough, can not reach requirement.Therefore, for guarantee gas-liquid separation is smooth and the uniform distribution of refrigerant liquid, it is very necessary for designing a kind of evaporimeter that is reasonable and precision machining.
Summary of the invention
The object of the invention is to provide a kind of gas-liquid separation downward film evaporator for the problems referred to above, the gas-liquid that this downward film evaporator can realize refrigerant medium is effectively separated and the uniform distribution of liquid coolant working medium, thus makes downward film evaporator be in good running environment.
For achieving the above object, the technical solution used in the present invention is: a kind of gas-liquid separation downward film evaporator, it comprises housing and is fixed on the heat exchange pipe group in housing, described case top has gas outlet, distributor is provided with above described heat exchange pipe group, described distributor comprises baffle plate, pressure cell and gravity box, described gravity box bottom even is densely covered with the first through hole and is provided with polylith dividing plate in the width direction, gravity box is built with pressure cell, the surrounding of described pressure cell and the surrounding of gravity box leave gap, the top of described pressure cell is evenly densely covered with the second through hole, the top of described pressure cell is provided with baffle plate, the both sides of described baffle plate are fixed on described gravity box, the edge of described baffle plate is provided with orifice plate, orifice plate is provided with cover plate, leave gap between orifice plate and cover plate and form outgassing groove, described baffle plate is provided with inlet tube, described inlet tube is communicated with described pressure cell.
The present invention coordinates equal liquid by pressure cell with gravity box, gas-liquid mixed refrigerant medium enters from inlet tube the pressure cell that bottom surface and periphery all close, then evenly spray from second through hole at pressure cell top, impact surrounding on baffle plate is scattered, then the liquid runs down baffle plate side in gas-liquid mixed refrigerant medium is along falling into gravity box, finally evenly flow out from the first through hole bottom gravity box, continuously flow on the heat exchanger tube below it, and the gas in gas-liquid mixed refrigerant medium is after the outgassing groove discharge between orifice plate and cover plate, sucked by compressor through the gas outlet of case top, this employing pressure potential and gravitional force cooperatively interact distribution refrigerant medium, gas coolant working medium is separated in gravity box with liquid coolant working medium, and make subsequent liquid refrigerant medium separatory reliability high, uniformity is good, separatory can be realized even, prevent from refrigerant medium from splashing to reveal, and the pressure loss is little, in the present invention, the method for salary distribution of refrigerant medium makes downward film evaporator can give full play to its performance advantage, refrigerant medium is fully contacted with heat exchange pipe group, significantly improves evaporation efficiency, the present invention is simple and compact for structure, good manufacturability.
Further, the quantity of the second through hole in described pressure cell is: 15 ~ 150, and the aperture of described second through hole is: 4mm ~ 40mm.Utilize pressure potential to realize the first time uniform distribution of refrigerant medium in the second through hole, the second through hole evenly gathered can homogenize liquid stream, prevents the refrigerant medium sprayed from pressure cell from splashing.
Further, the quantity of the first through hole in described gravity box is: 800 ~ 4000, and the aperture of described first through hole is: 2mm ~ 10mm.Gravitional force is utilized to realize the final uniform distribution of refrigerant medium in the first through hole.
Further, described distributor is arranged on immediately below the gas outlet of described housing.Distributor is arranged on immediately below venthole, is conducive to isolated gas in distributor and discharges smoothly from venthole.
Preferably, described dividing plate is elongated dividing plate, and the height of described dividing plate is: 5mm ~ 50mm.Dividing plate is used for the bottom surface of pressure cell and gravity box to separate, to reserve hydrospace.
Further preferably, described orifice plate is evenly equipped with some pores, the circulation area of described pore is: 0.01m
2~ 0.3 m
2.Pore in gravity box on isolated gas through holes plate, then discharge distributor from the outgassing groove between orifice plate and cover plate.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of gas-liquid separation downward film evaporator.
Fig. 2 is the structural representation of distributor in Fig. 1.
Fig. 3 is the decomposition texture schematic diagram of distributor in Fig. 2.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, is convenient to more clearly understand the present invention, but they do not form restriction to the present invention.
As Fig. 1, a kind of gas-liquid separation downward film evaporator, the heat exchange pipe group 2 that it comprises housing 1 and is horizontally set in housing 1, described housing 1 top has gas outlet 3, and immediately below the gas outlet 3 of described housing 1, (directly over heat exchange pipe group) is provided with distributor 4.
As Fig. 2, shown in Fig. 3, distributor 4 comprises and being rectangle and the gravity box 403 of open top, described gravity box 403 bottom even is densely covered with the first circular through hole 5, four pieces of elongated dividing plates 6 parallel to each other are evenly provided with in the width direction bottom described gravity box 403, described dividing plate 6 is provided with the pressure cell 402 that rectangle is hollow form, gap is left between the outside side wall 12 of described pressure cell 402 and the inside side walls 13 of gravity box 403, that is: gravity box 403 is built with pressure cell 402, the surrounding of pressure cell 402 does not contact with the surrounding of gravity box 403, left liquid gap, the top of described pressure cell 402 is evenly densely covered with the second circular through hole 7, the top of described pressure cell 402 is provided with baffle plate 401, the both sides of described baffle plate 401 are fixed on described gravity box 403, the top of gravity box 403 is covered, gap is left between pressure cell 402 top in the top of described baffle plate 401 and gravity box 403, the edge of described baffle plate 401 is provided with orifice plate 8, orifice plate 8 is provided with the cover plate 9 in bending, leave gap between orifice plate 8 and cover plate 9 and form outgassing groove 10, described baffle plate 401 is provided with inlet tube 11, described inlet tube 11 is communicated with described pressure cell 402 inside.Wherein, the orifice plate 8 on gravity box 403 top is evenly equipped with some pores 801, the preferred 0.01m of circulation area of pore 801
2~ 0.3m
2; In addition, the quantity of the second through hole 7 in described pressure cell 402 preferably 15 ~ 150, the preferred 4mm ~ 40mm in aperture of described second through hole 7; The quantity of the first through hole 5 in described gravity box 403 preferably 800 ~ 4000, the preferred 2mm ~ 10mm in aperture of described first through hole 5; The height of the elongated dividing plate 6 bottom gravity box 403 is preferably at 5 mm ~ 50 mm.
The course of work of the present invention is as shown in Figure 1: after gas-liquid mixed refrigerant medium enters distributor 4, be full of whole pressure cell 402, then the second through hole 7 arranged from pressure cell 402 top evenly ejects, ensureing that uniform method is sprayed at the second through hole 7 place is the pressure drop controlling whole pressure cell 402, and ensures that the method whether pressure drop of actual pressure box 402 equals design pressure drop utilizes fluid analysis software (CFD) to simulate, after gas-liquid mixed refrigerant medium evenly ejects from the second through hole 7, impact is on baffle plate 401, drop or liquid stream surrounding are scattered, liquid in gas-liquid mixed refrigerant medium is as shown in arrow 14, fall after rise to gravity box 403 from the gap uniformity between pressure cell 402 and gravity box 403 sidewall, continuously flow in the heat exchange pipe group 2 below it by the first through hole 5 bottom gravity box 403, gas in gas-liquid mixed refrigerant medium is as shown in arrow 15, flow out from the pore 801 the baffle plate 401 edge orifice plate 8 on gravity box 403 top, and then the outgassing groove 10 to be formed from the gap between orifice plate 8 and cover plate 9 is discharged, sucked by compressor through the gas outlet 3 at evaporator shell 1 top, enter compressor to be compressed, gas coolant working medium is separated in gravity box 403 with liquid coolant working medium.
Claims (4)
1. a gas-liquid separation downward film evaporator, it comprises housing (1) and is fixed on the heat exchange pipe group (2) in housing (1), described case top has gas outlet (3), described heat exchange pipe group (2) top is provided with distributor (4), it is characterized in that: described distributor (4) is arranged on immediately below the gas outlet (3) of described housing (1), described distributor (4) comprises baffle plate (401), pressure cell (402) and gravity box (403), described gravity box (403) bottom even is densely covered with the first through hole (5) and is provided with polylith dividing plate (6) in the width direction, gravity box (403) is built with pressure cell (402), the surrounding of described pressure cell (402) and the surrounding of gravity box (403) leave gap, the top of described pressure cell (402) is evenly densely covered with the second through hole (7), the top of described pressure cell (402) is provided with baffle plate (401), the both sides of described baffle plate (401) are fixed on described gravity box (403), the edge of described baffle plate (401) is provided with orifice plate (8), orifice plate (8) is provided with cover plate (9), leave gap between orifice plate (8) and cover plate (9) and form outgassing groove, described baffle plate (401) is provided with inlet tube (11), described inlet tube (11) is communicated with described pressure cell (402), described orifice plate (8) is evenly equipped with some pores (801), the circulation area of described pore (801) is: 0.01m
2~ 0.3m
2.
2. a kind of gas-liquid separation downward film evaporator according to claim 1, it is characterized in that: the quantity of the second through hole (7) in described pressure cell (402) is: 15 ~ 150, the aperture of described second through hole (7) is: 4mm ~ 40mm.
3. a kind of gas-liquid separation downward film evaporator according to claim 1, it is characterized in that: the quantity of the first through hole (5) in described gravity box (403) is: 800 ~ 4000, the aperture of described first through hole (5) is: 2mm ~ 10mm.
4. a kind of gas-liquid separation downward film evaporator according to claim 1, is characterized in that: described dividing plate (6) for elongated dividing plate (6), the height of described dividing plate (6) is: 5mm ~ 50mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210580823.7A CN103062962B (en) | 2012-12-27 | 2012-12-27 | Gas-liquid separative falling film type evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210580823.7A CN103062962B (en) | 2012-12-27 | 2012-12-27 | Gas-liquid separative falling film type evaporator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103062962A CN103062962A (en) | 2013-04-24 |
| CN103062962B true CN103062962B (en) | 2015-04-29 |
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ID=48105700
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210580823.7A Active CN103062962B (en) | 2012-12-27 | 2012-12-27 | Gas-liquid separative falling film type evaporator |
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| CN (1) | CN103062962B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016014495A (en) * | 2014-07-01 | 2016-01-28 | ダイキン工業株式会社 | Falling film evaporator |
| CN107667265B (en) * | 2015-05-27 | 2020-11-13 | 开利公司 | Multi-stage distribution system for evaporators |
| CN106482400B (en) * | 2016-11-15 | 2019-04-12 | 顿汉布什(中国)工业有限公司 | A kind of distributor in downward film evaporator |
| CN112283983B (en) * | 2019-07-23 | 2022-07-15 | 约克（无锡）空调冷冻设备有限公司 | Falling film evaporator and air conditioning system |
| CN112344604A (en) * | 2019-08-08 | 2021-02-09 | 青岛海尔空调电子有限公司 | Liquid equalizing device and air conditioner |
| CN112944744B (en) * | 2019-12-10 | 2024-07-09 | 珠海格力电器股份有限公司 | Liquid distributor, falling film heat exchanger and air conditioner |
| KR102292396B1 (en) | 2020-02-13 | 2021-08-20 | 엘지전자 주식회사 | Evaporator |
| KR102292397B1 (en) | 2020-02-13 | 2021-08-20 | 엘지전자 주식회사 | Evaporator |
| JP6880280B1 (en) * | 2020-05-01 | 2021-06-02 | 三菱重工サーマルシステムズ株式会社 | Evaporator |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0313079A2 (en) * | 1987-10-23 | 1989-04-26 | Hitachi, Ltd. | Falling film evaporator |
| CN201527214U (en) * | 2009-06-30 | 2010-07-14 | 广州联合冷热设备有限公司 | Refrigerant distributor |
| CN202158699U (en) * | 2011-06-27 | 2012-03-07 | 四川同达博尔置业有限公司 | Refrigerating fluid distributor of falling film evaporator |
| CN203083207U (en) * | 2012-12-27 | 2013-07-24 | 麦克维尔空调制冷(武汉)有限公司 | Gas-liquid separation falling film type evaporator |
-
2012
- 2012-12-27 CN CN201210580823.7A patent/CN103062962B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0313079A2 (en) * | 1987-10-23 | 1989-04-26 | Hitachi, Ltd. | Falling film evaporator |
| CN201527214U (en) * | 2009-06-30 | 2010-07-14 | 广州联合冷热设备有限公司 | Refrigerant distributor |
| CN202158699U (en) * | 2011-06-27 | 2012-03-07 | 四川同达博尔置业有限公司 | Refrigerating fluid distributor of falling film evaporator |
| CN203083207U (en) * | 2012-12-27 | 2013-07-24 | 麦克维尔空调制冷(武汉)有限公司 | Gas-liquid separation falling film type evaporator |
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| CN103062962A (en) | 2013-04-24 |
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