CN203687461U - Full falling film evaporator with double refrigerant distributing devices - Google Patents
Full falling film evaporator with double refrigerant distributing devices Download PDFInfo
- Publication number
- CN203687461U CN203687461U CN201320889371.0U CN201320889371U CN203687461U CN 203687461 U CN203687461 U CN 203687461U CN 201320889371 U CN201320889371 U CN 201320889371U CN 203687461 U CN203687461 U CN 203687461U
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- Prior art keywords
- heat exchange
- distributor
- tubes
- refrigerant
- nest
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- Expired - Lifetime
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 42
- 239000011552 falling film Substances 0.000 title abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 238000009826 distribution Methods 0.000 claims abstract description 28
- 239000002826 coolant Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 239000004744 fabric Substances 0.000 claims description 16
- 230000001788 irregular Effects 0.000 claims description 3
- 238000004134 energy conservation Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 18
- 239000010408 film Substances 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000009827 uniform distribution Methods 0.000 description 4
- 101100165177 Caenorhabditis elegans bath-15 gene Proteins 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 239000010726 refrigerant oil Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model discloses a full falling film evaporator with double refrigerant distributing devices. The full falling film evaporator comprises a cylinder body; a refrigerant inlet and a refrigerant outlet are arranged in the top of the cylinder body; an upper distributer is arranged on the interior of the cylinder body; air shielding plates are respectively arranged on two sides of the top of the upper distributor; a plurality of through holes communicated with the refrigerant outlet are arranged in each of the air shielding plates; an upper part heat exchange pipe group is arranged under the upper distributor; a lower distributor is arranged under the upper part heat exchange pipe group; a lower part heat exchange pipe group is arranged under the lower distributor; a rich oil area is arranged under the lower part heat exchange pipe group; a liquid level sensor controlling liquid levels is arranged in the rich oil area; and an oil return mouth is arranged in the rich oil area. According to the utility model, via the cooperation of the upper distributor and the lower distributor, full falling film type distribution of refrigerant is achieved, and film-shaped distribution of the refrigerant is formed on each of the heat exchange pipes, so heat exchange coefficient is increased; and via the liquid level sensor, the lower part heat exchange pipe group is protected from being flooded by the refrigerant so that the heat exchange coefficient is further increased, so filling quantity of the refrigerant and heat exchange area are reduced, and energy conservation and environment protection are achieved.
Description
Technical field
The utility model relates to refrigeration plant, refers to particularly a kind of high-fall kestner long-tube evaporator with double cooling medium distributor.
Background technology
The evaporimeter using in efficient cold water (heat pump) unit in refrigerating and air conditioning industry at present mainly contains flooded evaporator and this two classes evaporimeter of downward film evaporator, wherein, compare flooded evaporator, downward film evaporator has the advantages such as heat exchange efficiency is high, refrigerant charge is few, therefore, downward film evaporator application is more extensive.At present, the downward film evaporator using in air conditioner industry is commonly the hybrid falling film evaporator of top heat exchange nest of tubes falling film type evaporation and bottom heat exchange nest of tubes full-liquid type evaporation mixing, there is following defect in this downward film evaporator: 1) higher refrigerant liquid level is left in the bottom of existing downward film evaporator, base of evaporator refrigerant oil content is high, causes the bottom heat exchange nest of tubes coefficient of heat transfer low; 2) in addition, a large amount of refrigerant liquid of base of evaporator has increased coolant injection amount.
Summary of the invention
The purpose of this utility model is exactly the high-fall kestner long-tube evaporator that a kind of double cooling medium distributor will be provided, and this evaporimeter has improved heat transfer coefficient, has reduced coolant injection amount.
For achieving the above object, the technical solution adopted in the utility model is: a kind of high-fall kestner long-tube evaporator of double cooling medium distributor, comprise cylindrical shell, described cylindrical shell top is provided with refrigerant entrance and refrigerant exit, it is characterized in that: described inner barrel top is provided with distributor, the both sides, top of described upper distributor are respectively equipped with gas block panel, on described gas block panel, have the some via holes that communicate with described refrigerant exit, the below of described upper distributor is provided with top heat exchange nest of tubes, described top heat exchange nest of tubes below is provided with lower distributor, the below of described lower distributor is provided with bottom heat exchange nest of tubes, the below of described bottom heat exchange nest of tubes is rich oil district, be provided with the liquid level sensor of controlling liquid level at place of described rich oil district, and described rich oil district has oil return opening.
The utility model arranges double cooling medium distributor in evaporator tube, that is: two distributors, it comprises distributor and lower distributor, by the combination of upper distributor and lower distributor, improve the uniform distribution effect to refrigerant, thereby having realized refrigerant liquid high-fall membrane type on heat exchange nest of tubes in evaporator shell distributes, guaranteed that refrigerant realizes evenly dripping of columnar flow form to all heat exchanger tubes and drench supply simultaneously, and on each heat exchanger tube, form the membranaceous distribution of refrigerant, prevent over-allocation or distribute the not enough decline that causes heat transfer efficiency, improve the coefficient of heat transfer, and prevent that liquid coolant from splashing, in addition, the liquid level sensor arranging can guarantee to make base of evaporator rich oil district refrigerant liquid level lower than bottom heat exchange nest of tubes, avoid causing heat exchange nest of tubes in bottom flooded and cause its coefficient of heat transfer to decline by rich oil refrigerant, further improve the coefficient of heat transfer, thereby reduce coolant injection amount and heat exchange area, realized energy-conserving and environment-protective.
Further, described upper distributor comprises cover plate, described cover plate top is provided with inlet, described cover plate top sides is along having some balancing orifices, described cover plate below is provided with primary distribution box, described primary distribution box size is little compared with described cover plate, and its perisporium has some irregular liquid baths of crossing, described primary distribution box below is provided with cloth water cushion, described upper cloth water cushion below is provided with secondary distribution box, described secondary distribution box bottom has some even water holes, the top of described secondary distribution box along with the end of described cover plate along fitted seal.
Further, described lower distributor comprises tie-strut, and described tie-strut is provided with holder net, and described holder is coated with lower cloth water cushion on the net.
Further, described top heat exchange nest of tubes comprises heat exchange of top part nest of tubes and bottom heat exchange nest of tubes, between described heat exchange of top part nest of tubes and described bottom heat exchange nest of tubes, leaves the clearance channel that spacing is large compared with heat exchange tube diameter.
Further, described top heat exchanger tube and described bottom heat exchange nest of tubes are horizontal with in-line arrangement or wrong row's mode.
Further, described upper cloth water cushion is wire pads.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the high-fall kestner long-tube evaporator with double cooling medium distributor.
Fig. 2 is the structural representation of upper distributor in Fig. 1.
Fig. 3 is the explosive view of Fig. 2.
The specific embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail, is convenient to more clearly understand the utility model, but they do not form and limit the utility model.
As shown in Figure 1, a kind of high-fall kestner long-tube evaporator of double cooling medium distributor, comprise cylindrical shell 1, described cylindrical shell 1 top is provided with refrigerant entrance 2 and refrigerant exit, described cylindrical shell 1 inner and upper is provided with distributor 3, the both sides, top of described upper distributor 3 are respectively equipped with gas block panel 4, on described gas block panel 4, have the some via holes that communicate with described refrigerant exit, the below of described upper distributor 3 is provided with top heat exchange nest of tubes 5, described top heat exchange nest of tubes 5 comprises heat exchange of top part nest of tubes 22 and bottom heat exchange nest of tubes 23, between described heat exchange of top part nest of tubes 22 and described bottom heat exchange nest of tubes 23, leave the clearance channel 24 that spacing is large compared with heat exchange tube diameter, described bottom heat exchange nest of tubes 23 belows are provided with lower distributor 6, described lower distributor 6 comprises passive tie-strut 19, described tie-strut 19 is provided with steel holder net 20, on described holder net 20, be coated with lower cloth water cushion 21, this lower cloth water cushion 21 is wire pads, the below of described lower distributor 6 is provided with bottom heat exchange nest of tubes 7, the below of described bottom heat exchange nest of tubes 7 is rich oil district 8, be provided with the liquid level sensor 9 of controlling liquid level at 8 places of described rich oil district, and described rich oil district 8 has oil return opening 10, top heat exchange nest of tubes 5 is horizontal with in-line arrangement or wrong row's mode with bottom heat exchange nest of tubes 7, and at top heat exchange nest of tubes 5, bottom heat exchange nest of tubes 7, upper distributor 3, and respectively leave gaseous coolant passage between lower distributor 6.
As Fig. 2, shown in Fig. 3, described upper distributor 3 comprises cover plate 11, described cover plate 11 tops are provided with inlet 12, described cover plate 11 top sides are along having some balancing orifices 13, described cover plate 11 belows are provided with primary distribution box 14, the more described cover plate 11 of described primary distribution box 14 size is little, and its perisporium has some irregular liquid baths 15 of crossing, described primary distribution box 14 belows are provided with cloth water cushion 16, described upper cloth water cushion 16 is wire pads, described upper cloth water cushion 16 belows are provided with secondary distribution box 17, described secondary distribution box 17 bottoms have the even water hole 18 of some circles, the top of described secondary distribution box 17 along with the end of described cover plate 11 along fitted seal.
The course of work of the present utility model is as follows: the fluid-mixing that becomes cryogenic liquid and cryogenic gas from condenser carries the high-temperature liquid state refrigerant of coming by throttling arrangement (as electric expansion valve) throttling expansion, then enter in the upper distributor 3 this evaporimeter through inlet 12 from refrigerant entrance 2, gas-liquid mixed refrigerant enters after distributor 3, be full of whole primary distribution box 14, evenly eject by the non-uniform Distribution of primary distribution box 14 sides and the liquid bath 15 of crossing of difformity size, the side of striking cover plate 11, drop (liquid stream) surrounding is scattered, upwards cloth water cushion 16 falls, liquid refrigerants is absorbed rear uniform distribution by upper cloth water cushion 16 and is dropped in secondary distribution box 17, the aperture arranging by secondary distribution box 17 bottoms evenly falls to the top heat exchange nest of tubes 5 of its below with columnar flow continuously, form membranaceous distribution, with the refrigerating medium uniform heat exchange in top heat exchange nest of tubes 5, the pressure of upper distributor 3 inside and outside gaseous coolants is by balancing orifice 13 balances on cover plate 11, then, the refrigerant liquid that the top heat exchange nest of tubes 5 rear residues of flowing through are not evaporated falls to lower distributor 6, after being absorbed by its lower cloth water cushion 21, again evenly drip and drench on bottom heat exchange nest of tubes 7, form membranaceous distribution, conduct heat with the refrigerating medium in bottom heat exchange nest of tubes 7, then, residue rich oil refrigerant after 7 evaporations of bottom heat exchange nest of tubes accumulates in bottom heat exchange nest of tubes 7 bottom clearance spaces, form rich oil district 8 at base of evaporator, in the connecting pipeline of evaporimeter, be provided with liquid level sensor 9, to detect base of evaporator refrigerant liquid level, then feed back to throttling arrangement (as electric expansion valve) to control the cold medium flux that enters falling film evaporator from condenser, make the refrigerant liquid level in base of evaporator rich oil district 8 lower than bottom heat exchange nest of tubes 7, avoid causing bottom heat exchange nest of tubes 7 to be flooded by rich oil refrigerant and cause the coefficient of heat transfer to decline, and maintain certain refrigerant liquid level, be beneficial to oil return opening 10 oil returns from base of evaporator, rich oil refrigerant can be got back to compressor and enters oil eliminator again by waiting die mould jet pump to realize lubricating oil, simultaneously, all cold media gas through heat exchange nest of tubes evaporation are sucked by compressor after the via hole on the gas block panel 4 of upper distributor 3 both sides, top flows out, enter compressor compressed, the loose structure of this gas block panel 4 design too high absorbing gas belt liquid that causes of the local gaseous coolant flow velocity in device cylindrical shell 1 top that can avoid evaporating.Wherein, by the pressure drop of the whole primary distribution box 14 of reasonable control and each quantity, size and shape of liquid bath 15 crossed along its length, be conducive to guarantee that cold medium flux is along length uniform distribution.
The upper distributor that the utility model adopts pressure potential and gravitional force to cooperatively interact, and utilize the absorption of wire pads in upper distributor and bottom distributor to reallocate, guarantee that columnar flow falling liquid film distributes respectively refrigerant on top heat exchange nest of tubes and bottom heat exchange nest of tubes, thereby uniform distribution liquid refrigerants is to all heat exchanger tubes, and the decline of effectively having avoided refrigerant exchange heat pipe over-allocation or having distributed the not enough heat transfer efficiency causing, realize the high-fall film-type evaporation of refrigerant, improve heat transfer coefficient, thereby coolant injection amount and heat exchange area are reduced, reach the effect of energy-conserving and environment-protective.
Claims (6)
1. the high-fall kestner long-tube evaporator of a double cooling medium distributor, comprise cylindrical shell (1), described cylindrical shell (1) top is provided with refrigerant entrance (2) and refrigerant exit, it is characterized in that: described cylindrical shell (1) inner and upper is provided with distributor (3), the both sides, top of described upper distributor (3) are respectively equipped with gas block panel (4), on described gas block panel (4), have the some via holes that communicate with described refrigerant exit, the below of described upper distributor (3) is provided with top heat exchange nest of tubes (5), described top heat exchange nest of tubes (5) below is provided with lower distributor (6), the below of described lower distributor (6) is provided with bottom heat exchange nest of tubes (7), the below of described bottom heat exchange nest of tubes (7) is rich oil district (8), locate to be provided with the liquid level sensor (9) of controlling liquid level in described rich oil district (8), and described rich oil district (8) has oil return opening (10).
2. the high-fall kestner long-tube evaporator of a kind of double cooling medium distributor according to claim 1, it is characterized in that: described upper distributor (3) comprises cover plate (11), described cover plate (11) top is provided with inlet (12), described cover plate (11) top sides is along having some balancing orifices (13), described cover plate (11) below is provided with primary distribution box (14), the more described cover plate of described primary distribution box (14) size (11) is little, and its perisporium has some irregular liquid baths (15) of crossing, described primary distribution box (14) below is provided with cloth water cushion (16), described upper cloth water cushion (16) below is provided with secondary distribution box (17), described secondary distribution box (17) bottom has some even water holes (18), the top of described secondary distribution box (17) along with the end of described cover plate (11) along fitted seal.
3. the high-fall kestner long-tube evaporator of a kind of double cooling medium distributor according to claim 1, it is characterized in that: described lower distributor (6) comprises tie-strut (19), described tie-strut (19) is provided with holder net (20), is coated with lower cloth water cushion (21) on described holder net (20).
4. the high-fall kestner long-tube evaporator of a kind of double cooling medium distributor according to claim 1, it is characterized in that: described top heat exchange nest of tubes (5) comprises heat exchange of top part nest of tubes (22) and bottom heat exchange nest of tubes (23), between described heat exchange of top part nest of tubes (22) and described bottom heat exchange nest of tubes (23), leave the clearance channel that spacing is large compared with heat exchange tube diameter (24).
5. according to the high-fall kestner long-tube evaporator of a kind of double cooling medium distributor described in claim 1 or 4, it is characterized in that: described top heat exchanger tube (5) is horizontal with in-line arrangement or wrong row's mode with described bottom heat exchange nest of tubes (7).
6. the high-fall kestner long-tube evaporator of a kind of double cooling medium distributor according to claim 2, is characterized in that: described upper cloth water cushion (16) is wire pads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889371.0U CN203687461U (en) | 2013-12-30 | 2013-12-30 | Full falling film evaporator with double refrigerant distributing devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320889371.0U CN203687461U (en) | 2013-12-30 | 2013-12-30 | Full falling film evaporator with double refrigerant distributing devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203687461U true CN203687461U (en) | 2014-07-02 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320889371.0U Expired - Lifetime CN203687461U (en) | 2013-12-30 | 2013-12-30 | Full falling film evaporator with double refrigerant distributing devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203687461U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387653A (en) * | 2015-12-21 | 2016-03-09 | 重庆美的通用制冷设备有限公司 | Evaporator and water chilling unit having same |
| CN105805970A (en) * | 2016-03-22 | 2016-07-27 | 浙江英谷节能设备有限公司 | Heat pump unit and gas-liquid two-phase uniform distribution method |
-
2013
- 2013-12-30 CN CN201320889371.0U patent/CN203687461U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387653A (en) * | 2015-12-21 | 2016-03-09 | 重庆美的通用制冷设备有限公司 | Evaporator and water chilling unit having same |
| CN105387653B (en) * | 2015-12-21 | 2018-02-06 | 重庆美的通用制冷设备有限公司 | Evaporator and there are its handpiece Water Chilling Units |
| CN105805970A (en) * | 2016-03-22 | 2016-07-27 | 浙江英谷节能设备有限公司 | Heat pump unit and gas-liquid two-phase uniform distribution method |
| CN105805970B (en) * | 2016-03-22 | 2018-09-18 | 浙江英谷节能设备有限公司 | A kind of heat pump unit and gas-liquid two-phase uniform distribution method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140702 |
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| CX01 | Expiry of patent term |