CN201297803Y - Drip-leaching falling film type evaporator - Google Patents
Drip-leaching falling film type evaporator Download PDFInfo
- Publication number
- CN201297803Y CN201297803Y CNU2008200608144U CN200820060814U CN201297803Y CN 201297803 Y CN201297803 Y CN 201297803Y CN U2008200608144 U CNU2008200608144 U CN U2008200608144U CN 200820060814 U CN200820060814 U CN 200820060814U CN 201297803 Y CN201297803 Y CN 201297803Y
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- Prior art keywords
- plate
- phase refrigerant
- distribution
- refrigerant distributor
- cylinder
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D3/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium flows in a continuous film, or trickles freely, over the conduits
Abstract
The utility model relates to a drip-leaching falling film type evaporator. The prior falling film evaporator adopts a two-phase refrigerant distributor with a five-layered pore plate structure and a capillary tube structure; since the structure is complex, the processing and assembly are difficult, ununiform liquid distribution can be easily caused, the heat transfer property is decreased, and the energy efficiency is reduced. The drip-leaching falling film type evaporator adopts the technical scheme of a multi-directional two-stage depressurized distribution device, which is a two-phase refrigerant distributor comprising a trapezoidal shell, a multi-directional flow distribution plate, a first-stage distribution pore plate, a second-stage distribution pore plate, inspiring distribution plates and a closing end plate and can carry out multi-directional two-stage depressurized distribution, so that vapor-liquid refrigerant can be uniformly and effectively dripped on the outer surfaces of the walls of a bundle of evaporating tubes to carry out sufficient heat exchange. The utility model has the following advantages: the two-phase refrigerant distributor is adopted; the structure is simple; the fabrication is easy; the distribution of the vapor-liquid refrigerant is uniform; and the heat transfer property is improved. Compared with the prior flooded evaporator, energy can be saved by 15 percent to 20 percent, the refrigerant charge is reduced by 20 percent to 30 percent, and therefore the utility model is economic and can save energy.
Description
Technical field
The utility model relates to a kind of heat exchange container device in refrigerated air-conditioning system, particularly relates to a kind of trickle falling film type heat exchange container device in refrigerated air-conditioning system.
Background technology
Critical piece in the refrigerated air-conditioning system comprises: compressor, oil eliminator, condenser, reservoir, expansion valve, pipeline and control panels such as evaporimeter.Its kind of refrigeration cycle process is that cold-producing medium and the refrigeration oil gas phase mixture of high pressure superheater that compressor is discharged carries out after gas-liquid two-phase separates through oil eliminator, cold-producing medium enters in the condenser again and is condensed into high-pressure sub-cooled liquid by the heat absorption of normal temperature refrigerating medium, change into the low area overheat steam and sucked by compressor through putting hot gas by the normal temperature refrigerating medium in evaporimeter after the expansion valve throttling again, circulation realizes process of refrigerastion and so forth.Wherein downward film evaporator is to the energy-saving and cost-reducing central role that plays key of whole refrigeration air-conditioner.
In refrigerated air-conditioning system, what at present more advanced prior art downward film evaporator adopted is the vapour-liquid two phase refrigerant dispenser technology of five layers of AND DEWATERING FOR ORIFICE STRUCTURE, doing two phase refrigerant from top to bottom distributes, first laminate and second laminate expand two phase refrigerant and spread pressure drop, the vapour-liquid cold-producing medium partly separates; And drips the perforated panel of three layers of similar diamond shaped of pouring to the again, two phase refrigerant can be dripped pouring to the bottom orifice plate, and the 4th layer of perforated panel has spray two phase refrigerant effect.Leave segment space between the 4th laminate and layer 5 plate, can drip the mode of pouring with gravity for complete liquid refrigerant, the control liquid refrigerant drips and drenches to the steam-generating bank surface, is beneficial to heat exchange.But the trickle falling film type evaporator of prior art remains the defective aspect following: 1) because in evaporimeter, the structure of the two phase refrigerant distributor of five layers of orifice plate is complicated, processing and assembly difficulty height, cause separatory inhomogeneous easily, make liquid refrigerant drench inhomogeneous along dripping of the length of steam-generating bank and width, all tube bank surfaces can not evenly form the cold-producing medium liquid film, insufficient through the gasification after the heat exchange, cause the liquid refrigerant of evaporimeter cylinder bottom to stockpile too much, oil return is insufficient, and heat transfer property descends; 2), cause efficiency to reduce because air-breathing unreasonable distribution causes back the liquid phenomenon easily; 3) existing five layers of AND DEWATERING FOR ORIFICE STRUCTURE and also have the two phase refrigerant distributor of forms such as a kind of capillary pipe structure all to exist complex structure, seal request height, difficulty of processing big cause the processing cost height, and are uneconomical, not energy-conservation.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, it is the purpose of this utility model place that a kind of simple for structure, compact, effective trickle falling film type evaporator device and using method of using in refrigerated air-conditioning system is provided.The technical solution of the utility model is that simple for structure, compact, effective two phase refrigerant distributor and steam-generating bank are installed in the horizontal steel cylinder from top to bottom in proper order, by distributor with two phase refrigerant with the form of liquid state length and width along tube bank, drip pouring vertically downward equably on all tube bank surfaces, make it effectively form the cold-producing medium liquid film, through fully gasification after the heat exchange of refrigerating medium in the steam-generating bank.Cold-producing medium after the gasification is flowed to air intake duct equably and is entered compressor by a plurality of airflow holes on the air-breathing distribution plate.Refrigeration oil then sinks to evaporimeter cylinder bottom along the steam-generating bank wall in the process of cold-producing medium gasification, enter compressor by the oil return interface by the high pressure injection.
The technical solution of the utility model is come specific implementation by following technical measures: a kind of trickle falling film type evaporator device that uses in refrigerated air-conditioning system, it is by cylinder, the two phase refrigerant distributor, feed tube, air intake duct, steam-generating bank, support plate, the oil return interface, tube sheet and refrigerating medium are imported and exported and are formed, it is characterized in that described two phase refrigerant distributor is by trapezoidal housing, multidirectional flow distribution plate, the one-level distributing pore plate, the secondary distribution orifice plate, air-breathing distribution plate and end-plate are formed, wherein: divide upper and lower settings in same horizontal steel cylinder in two phase refrigerant distributor and steam-generating bank.The cross section of the sealing that the plane secondary distribution orifice plate of the housing that described two phase refrigerant distributor is the trapezoidal protuberance on a top, bottom and the end-plate at both ends are formed is trapezoidal column; The interior cavity length basically identical of the length of the two phase refrigerant distributor of this trapezoidal column and cylinder, and level is installed in top in the cylinder along the length of steam-generating bank and width, and connect with the feed tube that passes cylinder top and to communicate.The two phase refrigerant distributor has adopted multidirectional secondary step-down distributor, top in the two phase refrigerant distributor is provided with the multidirectional flow distribution plate of cross section for trapezoidal (also can be that the cross section is that V-arrangement shape and cross section are square), the pilot hole in the different apertures of distribution array on the inclined-plane, both sides of multidirectional flow distribution plate and bottom surface, the 1.5-2 that these pilot hole aperture sums are feed tube latus rectums doubly, two phase refrigerant is uniformly distributed on the one-level distributing pore plate lower, planar shape and separatory hole, the different aperture of the array that distributes with constant flow velocity with width along the length in the distributor, the 2-2.5 that these aperture, separatory hole sums are feed tube latus rectums doubly, latus rectum increases, form the step-down of two phase refrigerant one-level, the vapour-liquid cold-producing medium separates substantially, and with the two phase refrigerant rectification drip drench to the base plane shape and spaced of the some that distributes drench on the secondary distribution orifice plate of slotted hole, the 80-90 that these pouring slotted hole aperture sums are feed tube latus rectums doubly, leave the interval of certain (20mm-30mm) between one-level distributing pore plate and the secondary distribution orifice plate, latus rectum increases once more, form the step-down of two phase refrigerant secondary, the vapour-liquid cold-producing medium separates fully.The secondary distribution orifice plate both sides, bottom of two phase refrigerant distributor are equipped with the air-breathing distribution plate with the same length of two phase refrigerant distributor, the lateral of the air-breathing distribution plate on both sides tilts and is installed on the barrel of cylinder, be distributed with the airflow hole in the different apertures of array on the two air-breathing distribution plate inclined-planes, the aperture sum of these airflow holes is latus rectum 6-8 times of air intake duct.The end-plate segmentation soldering and sealing at the both ends of two phase refrigerant distributor, the below of two phase refrigerant distributor is the array steam-generating bank, in order to guarantee abundant, effectively to contact between two phase refrigerant and the array steam-generating bank outer pipe wall, the upper and lower part of steam-generating bank is that positive trigonometric sum corner equilateral triangle is arranged, and fix with the two ends tube plate expanded-connecting, the centre is supported with support plate, the bottom of cylinder is provided with the oil return interface, refrigerating medium is imported and exported the left and right two ends that are separately positioned on cylinder, also can all be arranged on the same end of cylinder.
The using method of the utility model trickle falling film type evaporator is: low pressure vapour-liquid cold-producing medium and refrigeration oil mixture are entered the device of above-mentioned two phase refrigerant distributor by feed tube, after two phase refrigerant is distributed through multidirectional secondary step-down with two phase refrigerant with the form of liquid state length and width along steam-generating bank, drip the outer surface of tube wall of pouring vertically downward equably in all evapn tube bank, make it effectively form the cold-producing medium liquid film, through fully gasification after the refrigerating medium heat exchange in the tube bank.Cold-producing medium after the gasification, is flowed to air intake duct and enters compressor equably by the space on cylinder top by a plurality of airflow holes on the air-breathing distribution plate.Refrigeration oil then sinks to the bottom of evaporimeter cylinder along outer surface of tube wall in the process of cold-producing medium gasification, enter compressor through the oil return interface by the high pressure injection.
The beneficial effects of the utility model are that this trickle falling film type evaporator has adopted the two phase refrigerant dispenser technology of multidirectional secondary step-down distributor, are a kind of simple in structure, make easily, and processing cost is low.Vapour-liquid cold-producing medium separatory is even, and gasification is abundant, has improved heat transfer property.The air-breathing liquid that do not return has improved efficiency.The liquid refrigerant of evaporimeter cylinder bottom stockpiles minimum, and unit is fully oil return when any load operation, reduces refrigerant charge, has reduced energy consumption.Than the energy-conservation 15-20% of existing flooded evaporator, refrigerant charge reduces 20-30%, not only economy but also energy-conservation.
Description of drawings
Fig. 1 is the radial section structural representation of the utility model trickle falling film type evaporator device embodiment.
Fig. 2 is the axial section structural representation of the utility model trickle falling film type evaporator device embodiment.
Fig. 3 is the radial section structural representation of the two phase refrigerant distributor among the utility model embodiment.
Each legend mark is represented following meaning respectively in the accompanying drawing:
1---cylinder, 2---two phase refrigerant distributor, 3---feed tube, 4---air intake duct,
5---steam-generating bank, 6---support plate, 7---oil return interface, 8---tube sheet,
The import and export of 9---refrigerating medium,
The multidirectional flow distribution plate of the trapezoidal housing 202---of 201---, 203---one-level distributing pore plate,
204---secondary distribution orifice plate, the air-breathing distribution plate of 205---, 206---end-plate
The specific embodiment
Below in conjunction with accompanying drawing 1,2,3 and embodiment the utility model is further specified:
Present embodiment is a kind of trickle falling film type evaporator device that is applied in the refrigeration air-conditioner unit that refrigerating capacity is EJM26HJ for the 500kW model, it is by cylinder 1, two phase refrigerant distributor 2, feed tube 3, air intake duct 4, steam-generating bank 5, support plate 6, oil return interface 7, tube sheet 8 and refrigerating medium import and export 9, trapezoidal housing 201, multidirectional flow distribution plate 202, one-level distributing pore plate 203, secondary distribution orifice plate 204, air-breathing distribution plate 205 and end-plate 206 are formed, each parts is pressed accompanying drawing 1,2,3 structures that provide install, wherein: the external diameter of cylinder 1 is Φ 516mm, length is 2600mm, adopts steel plate to roll and forms; With two phase refrigerant distributor 2 and steam-generating bank 5 be separately positioned in the above-mentioned horizontal steel cylinder 1 about, described two phase refrigerant distributor 2 is trapezoidal columns of sealing that the end-plate 206 at the secondary distribution orifice plate 204 of a housing 201 by the trapezoidal protuberance in top, base plane shape and both ends is formed; The length of the two phase refrigerant distributor 2 of this trapezoidal column is consistent with the interior cavity length of cylinder 1, and level is installed in steam-generating bank 5 tops in the cylinder 1, and is that the feed tube 3 of Φ 38mm connects and communicates with the external diameter that passes cylinder 1 top.Two phase refrigerant distributor 2 has adopted multidirectional secondary step-down distributor, top in two phase refrigerant distributor 2 is provided with down trapezoidal multidirectional flow distribution plate 202, the different apertures of many groups pilot holes distribute on the inclined-plane, both sides of multidirectional flow distribution plate 202 and bottom surface, these pilot hole aperture sums are 2 times of feed tube 2 latus rectums, two phase refrigerant is uniformly distributed on the one-level distributing pore plate 203 lower, planar shape and that distribute many groups separatory hole, different aperture with constant flow velocity with width along the length in the distributor 2, these aperture, separatory hole sums are 2.5 times of feed tube 3 latus rectums, form the step-down of two phase refrigerant one-level, the vapour-liquid cold-producing medium separates substantially, and the also distribution of drenching to the base plane shape is dripped in the two phase refrigerant rectification, and how spaced of group is drenched on the secondary distribution orifice plate 204 of slotted hole, these pouring slotted hole latus rectum sums are 90 times of feed tube 3 latus rectums, leave the interval of 30mm between one-level distributing pore plate 203 and the secondary distribution orifice plate 204 so that form the step-down of two phase refrigerant secondary, the vapour-liquid cold-producing medium separates fully.Secondary distribution orifice plate 204 both sides, bottom of two phase refrigerant distributor 2 are provided with upward being contained on round simple 1 the barrel of air-breathing distribution plate 205 And that length is the same with it, be distributed with the airflow hole in a plurality of different apertures on two inclined-planes of air-breathing distribution plate 205, the aperture sum of these airflow holes is that external diameter is 8 times of latus rectum of the air intake duct 4 of Φ 89mm.The below of two phase refrigerant distributor 2 is array steam-generating bank 5, two groups of steam-generating banks 5 respectively are that positive trigonometric sum corner equilateral triangle is arranged up and down, and fix with two ends tube sheet 8 expanded joints, middle with support plate 6 supports, the bottom of cylinder 1 is provided with oil return interface 7, and refrigerating medium import and export 9 are separately positioned on the left and right two ends of cylinder 1.
Claims (4)
1. trickle falling film type evaporator device that in refrigerated air-conditioning system, uses, it is by cylinder (1), two phase refrigerant distributor (2), feed tube (3), air intake duct (4), steam-generating bank (5), support plate (6), oil return interface (7), tube sheet (8) and refrigerating medium are imported and exported (9) and are formed, it is characterized in that described two phase refrigerant distributor (2) is by trapezoidal housing (201), multidirectional flow distribution plate (202), one-level distributing pore plate (203), secondary distribution orifice plate (204), air-breathing distribution plate (205) and end-plate (206) are formed, and wherein: described two phase refrigerant distributor (2) is the housing (201) of the trapezoidal protuberance on a top, the cross section of the sealing that the plane secondary distribution orifice plate (204) of bottom and the end-plate (206) at both ends are formed is trapezoidal column; The length of the two phase refrigerant distributor (2) of this trapezoidal column is consistent with the interior cavity length of cylinder 1, and level is installed in the top of the interior steam-generating bank of cylinder (1) (5), and communicate with feed tube (3) connection of passing cylinder (1) top, top in two phase refrigerant distributor (2) is provided with the cross section and is down trapezoidal multidirectional flow distribution plate (202), the pilot hole in the different apertures of distribution array on the inclined-plane, both sides of multidirectional flow distribution plate (202) and bottom surface, these pilot hole aperture sums are 1.5-2 times of feed tube (3) latus rectum, make length and the width of two phase refrigerant in the distributor (2) be uniformly distributed in the lower, planar shape with constant flow velocity, and on the one-level distributing pore plate (203) in separatory hole, the different aperture of distribution array, the 2-2.5 that these aperture, separatory hole sums are feed tube (3) latus rectums doubly; Secondary distribution orifice plate (204) two phase refrigerant distributor (2) base plane shape and that distribute spaced pouring slotted hole, the 80-90 that these pouring slotted hole aperture sums are feed tube (3) latus rectums is doubly; Leave certain interval between one-level distributing pore plate (203) and the secondary distribution orifice plate (204); Bottom secondary distribution orifice plate (204) both sides of two phase refrigerant distributor (2) are equipped with the air-breathing distribution plate (205) with the same length of two phase refrigerant distributor (2), the lateral of the air-breathing distribution plate (205) on both sides tilts and is installed on the barrel of cylinder (1), be distributed with the airflow hole in a plurality of different apertures on two air-breathing distribution plate (205) inclined-planes, the aperture sum of these airflow holes is latus rectum 6-8 times of air intake duct (4); End-plate (206) the segmentation soldering and sealing at the both ends of two phase refrigerant distributor (2); The below of two phase refrigerant distributor (2) is array steam-generating bank (5), and it is up and down that positive trigonometric sum corner equilateral triangle is arranged that steam-generating bank (5) divides, and fixes with two ends tube sheet (8) expanded joint, and is middle with support plate (6) support; The bottom of cylinder (1) is provided with oil return interface (7), and refrigerating medium is imported and exported the left and right two ends that (9) are separately positioned on cylinder (1).
2. trickle falling film type evaporator device according to claim 1 is characterized in that the multidirectional flow distribution plate (202) in the described two phase refrigerant distributor (2) also can be that the cross section is that V-arrangement shape and cross section are square.
3. trickle falling film type evaporator device according to claim 1 is characterized in that leaving between one-level distributing pore plate (203) in the described two phase refrigerant distributor (2) and the secondary distribution orifice plate (204) interval of 20mm-30mm.
4. trickle falling film type evaporator device according to claim 1 is characterized in that described refrigerating medium import and export (9) also can all be arranged on the same end of cylinder (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200608144U CN201297803Y (en) | 2008-10-07 | 2008-10-07 | Drip-leaching falling film type evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200608144U CN201297803Y (en) | 2008-10-07 | 2008-10-07 | Drip-leaching falling film type evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201297803Y true CN201297803Y (en) | 2009-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200608144U Expired - Lifetime CN201297803Y (en) | 2008-10-07 | 2008-10-07 | Drip-leaching falling film type evaporator |
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| CN (1) | CN201297803Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104457040A (en) * | 2014-11-13 | 2015-03-25 | 广东申菱空调设备有限公司 | Spray-type falling film evaporator and liquid level control method thereof |
| CN104819605A (en) * | 2015-05-05 | 2015-08-05 | 昆山方佳机械制造有限公司 | Flooded evaporator |
| CN105509368A (en) * | 2014-09-23 | 2016-04-20 | 杭州三花研究院有限公司 | Heat exchanger and air-conditioning system |
| CN107255375A (en) * | 2017-06-30 | 2017-10-17 | 珠海格力电器股份有限公司 | Heat exchanger and air-conditioning device |
| CN112484346A (en) * | 2020-12-24 | 2021-03-12 | 无锡市同力空调设备有限公司 | Refrigerant distributor and dry evaporator with built-in refrigerant distributor |
-
2008
- 2008-10-07 CN CNU2008200608144U patent/CN201297803Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105509368A (en) * | 2014-09-23 | 2016-04-20 | 杭州三花研究院有限公司 | Heat exchanger and air-conditioning system |
| CN105509368B (en) * | 2014-09-23 | 2020-08-11 | 杭州三花研究院有限公司 | Heat exchanger and air conditioning system |
| CN104457040A (en) * | 2014-11-13 | 2015-03-25 | 广东申菱空调设备有限公司 | Spray-type falling film evaporator and liquid level control method thereof |
| CN104819605A (en) * | 2015-05-05 | 2015-08-05 | 昆山方佳机械制造有限公司 | Flooded evaporator |
| CN107255375A (en) * | 2017-06-30 | 2017-10-17 | 珠海格力电器股份有限公司 | Heat exchanger and air-conditioning device |
| CN112484346A (en) * | 2020-12-24 | 2021-03-12 | 无锡市同力空调设备有限公司 | Refrigerant distributor and dry evaporator with built-in refrigerant distributor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20090826 Effective date of abandoning: 20081007 |