CN2557890Y - Vertical full liquid evaporator with backheat exchange - Google Patents
Vertical full liquid evaporator with backheat exchange Download PDFInfo
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- CN2557890Y CN2557890Y CN 02265299 CN02265299U CN2557890Y CN 2557890 Y CN2557890 Y CN 2557890Y CN 02265299 CN02265299 CN 02265299 CN 02265299 U CN02265299 U CN 02265299U CN 2557890 Y CN2557890 Y CN 2557890Y
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Abstract
Disclosed is a vertical full liquid evaporator with a returning heat exchanger, belonging to the technical field of refrigeration. The utility model is composed of the vertical full liquid evaporator and the returning heat exchanger, wherein, the returning heat exchanger is placed horizontally, and is welded on the top of the vertical full liquid evaporator by means of two supporting feet; and a heat exchanging copper tube arranged inside the vertical full liquid evaporator is spirally arranged, while a returning heat exchanging copper tube arranged inside the returning heat exchanger is horizontally arranged. With reasonable and safe structure and high heat transfer coefficient, the utility model has the advantages that the oil returns smoothly and the heat exchanging effect is improved by about 30 percent.
Description
Technical field: the utility model relates to a kind of vertical flooded evaporator, particularly a kind of vertical flooded evaporator of taking back heat exchange belongs to refrigeration technology field.
Background technology: traditional flooded evaporator generally is horizontal, it is made up of housing and heat exchange copper pipe, the heat exchange copper pipe is along the axial horizontal positioned of housing, refrigerant liquid is from entering explosive evaporation behind the housing, gas is gone out from outlet and is entered compressor compresses, its operation principle is that generation is seethed with excitement phase transformation and absorb heat the refrigerating medium (or another working medium that undergoes phase transition) of the pure liquid state that cooling (or condensation) is flowed in heat-transfer pipe in cold-producing medium or the working medium housing outside heat-transfer pipe.This evaporimeter is because housing volume ratio own is bigger, cold-producing medium working medium is difficult to guarantee that boiling evenly in housing after inlet enters housing, and the cold-producing medium Working medium gas after being difficult to guarantee to seethe with excitement is dry gas when outlet is gone out, might have humid gas and enter compressor compresses, that is to say that return-air is with liquid easily; Can dissolve with lubricating oil owing to chlorofluoromethane refrigerant on the other hand, lubricating oil can accumulate in evaporimeter after going out compressor, and this type horizontal-type evaporator does not have fine solution oil return problem, makes lubricating oil be difficult to return compressor crankcase.Therefore, its heat transfer coefficient is lower, and outward appearance is bulky, the oil return difficulty.
Summary of the invention: the utility model provides a kind of vertical flooded evaporator of taking back heat exchange at the deficiencies in the prior art and defective, makes refrigerant gas become dry gas, refrigerant liquid in housing, balance the boiling and oil return smooth.The utility model is made of jointly vertical flooded evaporator and Returning heat-exchanger, the Returning heat-exchanger horizontal positioned, be welded on the vertical flooded evaporator top by two feets, heat exchange copper pipe curl is provided with in the vertical flooded evaporator, and the backheat exchange copper pipe in the Returning heat-exchanger becomes to be horizontally disposed with.
Vertical flooded evaporator mainly comprises: housing; upper end cover; bottom end cover; the heat exchange copper pipe; the outlet of cold-producing medium humid gas; the refrigerant liquid import; water inlet pipe; outlet pipe; safety valve; the oil return pipe interface; air bleeding valve; water flow switch; antifreeze temperature protection switch interface; pedestal; its connected mode is: housing is middle carbon seamless steel pipe; appearance is the rust prevention by applying liquid material lacquer after surface treatment; respectively weld an end cap up and down; a water inlet pipe is welded in the perforate of upper end cover side; an outlet pipe is welded in the perforate of bottom end cover side; end cap all can store a certain amount of water yield up and down; have two apertures at the upper end cover upper surface; air bleeding valve and water flow switch are set; the bottom end cover side has an aperture; antifreeze temperature protection switch interface is set; have four holes in the housing side; correspond to respectively: refrigerant liquid import, the outlet of cold-producing medium humid gas, safety valve (safety valve can prevent that the housing internal pressure is too high); the oil return pipe interface is provided with helical form heat exchange copper pipe and is enclosed within on the pedestal in the housing.
Returning heat-exchanger mainly comprises: the Returning heat-exchanger housing, the heat exchange copper pipe, liquid-inlet, the outlet of Returning heat-exchanger subcooled liquid, the import of cold-producing medium humid gas, dry gas outlet and oil return pipe interface, its connected mode is: be provided with number in the Returning heat-exchanger housing and flow back to the heat exchange copper pipe, the heat exchange copper pipe communicates with liquid-inlet, the refrigerant liquid import is connected with the outlet of Returning heat-exchanger subcooled liquid, the outlet of cold-producing medium humid gas links to each other with the import of cold-producing medium humid gas, the compressor air suction mouth can be directly connected in the dry gas outlet, and the oil return pipe interface is communicated with the back and directly connects compressor crankcase with the oil return pipe interface.
The heat exchange copper pipe is three helical layer structure shapes, divides three snares on pedestal by ascending order, and last interface is welded in the lower surface opening part of upper end cover, and lower interface is welded on the upper surface tapping of bottom end cover.
The utility model heat-transfer pipe can increase heat exchange area after adopting helical form greatly in equal space, dwindle the outward appearance volume of evaporimeter, lubricating oil separates thoroughly, more easily return the compressor axle box, the overheated mistake with refrigerant liquid of refrigerant gas coldly benefited for refrigeration system, it can not only increase coefficient of refrigerating performance, and can help the compressor operate as normal better, it is mainly realized by Returning heat-exchanger, Returning heat-exchanger designs on the top of flooded evaporator, freon liquid is earlier through Returning heat-exchanger during work, the damp steam that evaporimeter is discharged is heated to be superheated vapor, simultaneously, lubricating oil runs into densely covered tube bank and separates from the cold-producing medium drop of evaporation in Returning heat-exchanger, and return the pressure compressor along air intake duct, fluorine Lyons liquid further is cooled to unsaturation liquid (subcooled liquid) on the other hand, since this follow bad in, crossing the cold-peace suction superheat before the cold-producing medium throttling is to utilize low temperature saturated vapor that flows out evaporimeter and the saturated liquid that the flows out condenser diabatic process by Returning heat-exchanger to produce.Because the evaporating temperature of cold-producing medium far below condensation temperature, so the degree of supercooling of cold-producing medium and suction superheat are not subjected to cooling medium and the restriction of the medium temperature that is cooled, can make cold-producing medium obtain the bigger degree of supercooling and the degree of superheat, liquid is crossed cold energy increases coefficient of refrigerating performance.The saturation temperature Tk of the liquid refrigerant before the expansion valve, liquid refrigerant further is cooled to unsaturation liquid (subcooled liquid) behind Returning heat-exchanger, and this moment, temperature was supercooling temperature T
3, the subcooled liquid throttling has increased refrigerating capacity Δ eo3 than saturated liquid throttling, and Δ eo3 increases with the increase of crossing cold, but does not increase the wasted work amount of compressor, (area 1 ' 2 ' 3 ' 01 '); Can make lubricating oil more successfully return compressor and suitably increase suction superheat.Simultaneously, air-breathing a small amount of overheated compressor that can guarantee can not suck drop, prevents that cylinder from producing liquid hit phenomenon, helps the compressor safe operation and raises the efficiency.
The utility model course of work and operation principle are as follows: Returning heat-exchanger housing horizontal positioned; backheat exchange copper pipe along the Returning heat-exchanger housing shaft to horizontal positioned; two ends use electronics level pressure pipe expanding machine tensioner on tube sheet; refrigerant liquid enters the heat exchange copper pipe from liquid-inlet; cooling becomes subcooled liquid and flows out from liquid outlet; behind choke valve, evaporate by flowing in the housing in the liquid-inlet; evaporate isolated lubricating oil and return the compressor axle box by the oil return interface; the heat exchange copper pipe is processed into helical form; cold-producing medium humid gas after evaporation is directly entered the housing by the humid gas import after humid gas exports away; after becoming overheated gas behind the backheat exchange copper pipe, export away by dry gas; simultaneously the oil outer surface that condenses upon backheat exchange copper pipe becomes droplet-like to drop on the Returning heat-exchanger lower part of frame to return compressor crankcase by the oil return interface; refrigerating medium (water or other working medium) enters upper end cover by water inlet pipe; flow into spiral helicine backheat exchange copper pipe; after heat release, flow out by the outlet pipe outlet of bottom end cover; the anti-frost protection switch interface can be taken over control and be frozen switch; to avoid because of low temperature bursting by freezing backheat exchange copper pipe; but the air in the air bleeding valve discharge water system; water flow switch can guarantee just often just can put into operation in the water circulation, and safety valve can prevent hypertonia in the housing.
The overheated mistake with refrigerant liquid of refrigerant gas coldly benefited for refrigeration system, it can not only increase coefficient of refrigerating performance, and can help the compressor operate as normal better, it is mainly realized by Returning heat-exchanger, Returning heat-exchanger designs on the top of flooded evaporator, freon liquid is earlier through Returning heat-exchanger during work, the damp steam that evaporimeter is discharged is heated to be superheated vapor, simultaneously, lubricating oil runs into densely covered tube bank and separates from the cold-producing medium drop of evaporation in Returning heat-exchanger, and return the pressure compressor along air intake duct, fluorine Lyons liquid further is cooled to unsaturation liquid (subcooled liquid) on the other hand, because in this circulation, crossing the cold-peace suction superheat before the cold-producing medium throttling is to utilize low temperature saturated vapor that flows out evaporimeter and the saturated liquid that the flows out condenser diabatic process by Returning heat-exchanger to produce.Because the evaporating temperature of cold-producing medium far below condensation temperature, so the degree of supercooling of cold-producing medium and suction superheat are not subjected to cooling medium and the restriction of the medium temperature that is cooled, can make cold-producing medium obtain the bigger degree of supercooling and the degree of superheat, liquid is crossed cold energy increases coefficient of refrigerating performance.The saturation temperature Tk of the liquid refrigerant before the expansion valve, liquid refrigerant further is cooled to unsaturation liquid (subcooled liquid) behind Returning heat-exchanger, and this moment, temperature was supercooling temperature T
3, the subcooled liquid throttling has increased refrigerating capacity Δ eo3 than saturated liquid throttling, and Δ eo3 increases with the increase of crossing cold, but does not increase the wasted work amount of compressor, (area 1 ' 2 ' 3 ' 01 '); Can make lubricating oil more successfully return compressor and suitably increase suction superheat.Simultaneously, air-breathing a small amount of overheated compressor that can guarantee can not suck drop, prevents that cylinder from producing liquid hit phenomenon, helps the compressor safe operation and raises the efficiency.
Rational in infrastructure, the safety of the utility model, the oil return smoothness, the heat transfer coefficient height, the heat exchange effect has improved about 30%.
Description of drawings: Fig. 1 the utility model structural representation
The specific embodiment: as shown in Figure 1, the utility model is made of jointly vertical flooded evaporator 1 and Returning heat-exchanger 2, Returning heat-exchanger 2 horizontal positioned, be welded on vertical flooded evaporator 1 top by two feets, heat exchange copper pipe 4 curl settings in the vertical flooded evaporator 1, the backheat exchange copper pipe in the Returning heat-exchanger 2 is horizontally disposed with for 16 one-tenth.
Vertical flooded evaporator 1 mainly comprises: housing 22; upper end cover 23; bottom end cover 3; heat exchange copper pipe 4; cold-producing medium humid gas outlet 5; refrigerant liquid import 6; water inlet pipe 7; outlet pipe 8; safety valve 9; oil return pipe interface 10; air bleeding valve 11; water flow switch 12; antifreeze temperature protection switch interface 13; pedestal 14; its connected mode is: housing 22 respectively welds an end cap up and down; a water inlet pipe 7 is welded in upper end cover 23 side perforates; an outlet pipe 8 is welded in bottom end cover 3 side perforates; at upper end cover 23 upper surfaces two apertures are arranged; air bleeding valve 11 and water flow switch 12 are set; there is an aperture bottom end cover 3 sides; antifreeze temperature protection switch interface 13 is set; have four holes in housing 22 sides; correspond to respectively: refrigerant liquid import 6; cold-producing medium humid gas outlet 5; safety valve 9; oil return pipe interface 10 is provided with helical form heat exchange copper pipe 4 and is enclosed within on the pedestal 14 in the housing 22.
Returning heat-exchanger 2 mainly comprises: Returning heat-exchanger housing 15, backheat exchange copper pipe 16, refrigerant liquid import 17, Returning heat-exchanger subcooled liquid outlet 18, cold-producing medium humid gas import 19, dry gas outlet 20 and oil return pipe interface 21, its connected mode is: be provided with number in the Returning heat-exchanger housing 15 and flow back to heat exchange copper pipe 16, backheat exchange copper pipe 16 communicates with refrigerant liquid import 17, refrigerant liquid import 6 is connected with Returning heat-exchanger subcooled liquid outlet 18, cold-producing medium humid gas outlet 5 links to each other with cold-producing medium humid gas import 19, the compressor air suction mouth is directly connected in dry gas outlet 20, and oil return pipe interface 21 is communicated with the back and directly connects compressor crankcase with oil return pipe interface 10.
Heat exchange copper pipe 4 is three helical layer shape structures, divides three snares on pedestal 14 by ascending order, and last interface is welded in the lower surface opening part of upper end cover 23, and lower interface is welded on the upper surface tapping of bottom end cover 3.
Claims (4)
1, a kind of vertical flooded evaporator of taking back heat exchange, form jointly by vertical flooded evaporator (1) and Returning heat-exchanger (2), it is characterized in that Returning heat-exchanger (2) horizontal positioned, be welded on vertical flooded evaporator (1) top by two feets, heat exchange copper pipe (4) curl setting in the vertical flooded evaporator (1), the backheat exchange copper pipe (16) in the Returning heat-exchanger (2) becomes to be horizontally disposed with.
2; this vertical flooded evaporator of taking back heat exchange according to claim 1; it is characterized in that vertical flooded evaporator (1) mainly comprises: housing (22); upper end cover (23); bottom end cover (3); heat exchange copper pipe (4); cold-producing medium humid gas outlet (5); refrigerant liquid import (6); water inlet pipe (7); outlet pipe (8); safety valve (9); oil return pipe interface (10); air bleeding valve (11); water flow switch (12); antifreeze temperature protection switch interface (13); pedestal (14); its connected mode is: housing (22) respectively is welded with an end cap up and down; a water inlet pipe (7) is welded in upper end cover (23) side perforate; an outlet pipe (8) is welded in bottom end cover (3) side perforate; at upper end cover (23) upper surface two apertures are arranged; air bleeding valve (11) and water flow switch (12) are set; there is an aperture bottom end cover (3) side; antifreeze temperature protection switch interface (13) is set; in housing (22) side four holes are arranged; correspond to respectively: refrigerant liquid import (6); cold-producing medium humid gas outlet (5); safety valve (9); oil return pipe interface (10) is provided with helical form heat exchange copper pipe (4) and is enclosed within on the pedestal (14) in the housing (22).
3, this vertical flooded evaporator of taking back heat exchange according to claim 2, it is characterized in that heat exchange copper pipe (4) is the three-decker helical form, divide three snares on pedestal (14) by ascending order, last interface is welded in the lower surface opening part of upper end cover (23), and lower interface is welded on the upper surface tapping of bottom end cover (3).
4, this vertical flooded evaporator of taking back heat exchange according to claim 1, it is characterized in that Returning heat-exchanger (2) mainly comprises: Returning heat-exchanger housing (15), backheat exchange copper pipe (16), liquid-inlet (17), Returning heat-exchanger subcooled liquid outlet (18), cold-producing medium humid gas import (19), dry gas outlet (20) and oil return pipe interface (21), its connected mode is: be provided with number in the Returning heat-exchanger housing (15) and flow back to heat exchange copper pipe (16), backheat exchange copper pipe (16) communicates with liquid-inlet (17), refrigerant liquid import (6) is connected with Returning heat-exchanger subcooled liquid outlet (18), cold-producing medium humid gas outlet (5) links to each other with cold-producing medium humid gas import (19), the compressor air suction mouth is directly connected in dry gas outlet (20), and oil return pipe interface (21) is communicated with the back and directly connects compressor crankcase with oil return pipe interface (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02265299 CN2557890Y (en) | 2002-07-04 | 2002-07-04 | Vertical full liquid evaporator with backheat exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02265299 CN2557890Y (en) | 2002-07-04 | 2002-07-04 | Vertical full liquid evaporator with backheat exchange |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2557890Y true CN2557890Y (en) | 2003-06-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02265299 Expired - Fee Related CN2557890Y (en) | 2002-07-04 | 2002-07-04 | Vertical full liquid evaporator with backheat exchange |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2557890Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281002B (en) * | 2008-01-08 | 2011-04-27 | 王全龄 | High-efficiency full solution type coupled heat exchanger |
| CN101929768B (en) * | 2008-07-24 | 2013-05-29 | 德尔菲技术公司 | Internal heat exchanger assembly |
| CN111322797A (en) * | 2018-12-17 | 2020-06-23 | 杭州赛富特设备有限公司 | Evaporator, evaporation system and evaporator oil return method |
-
2002
- 2002-07-04 CN CN 02265299 patent/CN2557890Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101281002B (en) * | 2008-01-08 | 2011-04-27 | 王全龄 | High-efficiency full solution type coupled heat exchanger |
| CN101929768B (en) * | 2008-07-24 | 2013-05-29 | 德尔菲技术公司 | Internal heat exchanger assembly |
| CN111322797A (en) * | 2018-12-17 | 2020-06-23 | 杭州赛富特设备有限公司 | Evaporator, evaporation system and evaporator oil return method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |