A kind of condenser of built-in oil eliminator
The invention belongs to the condenser structure field of air-conditioning system, particularly relate to a kind of condenser of built-in oil eliminator.
When air conditioner refrigerating unit operates, refrigeration oil inevitably more or less enters whole refrigeration system with refrigerant gas, participates in kind of refrigeration cycle.After particularly entering evaporimeter, the refrigeration oil being dissolved in cold-producing medium because the evaporation of cold-producing medium is deposited on base of evaporator with the form of liquid oil droplet, cannot can be got back in compressor crankcase with refrigerant gas.When refrigeration oil cannot return compressor for a long time continuously, pasta in compressor will be caused to decline, and refrigeration oil is exhausted, finally there will be the pernicious faults such as compressor oil starvation, seize even burn.In addition, one deck oil film can be formed on its heat exchanger tube surface after refrigeration oil enters evaporimeter or condenser with cold-producing medium, because this layer of oil film thermal conductivity factor is less, causes thermal resistance to increase, affect heat exchange property.
In order to ensure the operation of compressor stability and safety, reduce the refrigeration oil entered in heat exchanger as far as possible, usually an oil eliminator is set between the gas exhaust piping and condenser of refrigeration unit, separate directly return with being vented the refrigeration oil of together discharging to ensure the normal operation of compressor in compressor, and alleviate the impact of oil film on evaporimeter and condensing heat-exchange performance.The oil eliminator of this independent setting causes adapter complicated, and pressure drop increases, and efficiency reduces, and also makes the overall volume of air-conditioner set increase, cost increase simultaneously.
In order to overcome the deficiency of above-mentioned technology, there is the integrated equipment be arranged on by oil eliminator in condenser, being called built-in oil content integrated condenser.Its technical scheme is separated from the cold-producing medium gas phase of high pressure superheater by refrigeration oil in same cylinder, isolated oil directly returns compressor, and the cold-producing medium of gas phase contacts with cold heat exchanger tube and is condensed into liquid state, discharge from the liquid refrigerant outlet of bottom.Built-in oil content integrated condenser can realize the integration of oily piece-rate system and heat-exchange system, thus reduces pressure drop, improves efficiency, and system adapter is simple, and complete machine is succinct.
But, filter type oil separator is only placed in condenser by existing built-in oil content integrated condenser, structural combination and cooperation functionally both not considering, cause the flow velocity of built-in oil eliminator high, flow velocity is uneven, inferior separating effect, also has volume large in addition, the shortcomings such as process and assemble difficulty.
Chinese patent notification number is that the utility model patent of CN200961976Y discloses " condenser for threaded spindle flooded air conditioning group ", and its technical scheme lacks even gas distribution device exactly, causes gas flow rate uneven, have impact on result of use.
And the application for a patent for invention that China Patent Publication No. is CN101270945 discloses " a kind of built-in oily separate type condensing unit ", its technical scheme is also just direct makes the Horizontal-type filtering condenser that a bi-directional secondary is separated into the arc top being arranged on condenser cylindrical shell afterwards, its weak point is also cause the flow velocity in silk screen filter layer high, cold-producing medium enters condenser from the outlet at the two ends of oil eliminator, cause cold-producing medium skewness in tube bank, oil eliminator volume is large simultaneously, causes the volume of whole condenser to increase.
And for example, Chinese patent notification number is that the utility model patent of CN202013056 discloses " gas and oil separating plant being built in condenser ", it has carried out some to the subproblem in first technology and has improved, improve the distributing homogeneity on heat-exchanging tube bundle of cold-producing medium, but it is high by the speed of silk screen layer that it also exists cold-producing medium equally, cause the problems such as oily inferior separating effect, not fully in conjunction with the design feature of oil eliminator and condenser itself.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of compact conformation is provided, the condenser of processing and installation simple built oil eliminator, this condenser is by the improvement of structure, make cold-producing medium low and more at the uniform velocity by filter course hourly velocity, and cold-producing medium is uniformly distributed vertically, make oil content effective, good effect of heat exchange.
In order to realize foregoing invention object, the technical scheme of employing is as follows.
A kind of condenser of built-in oil eliminator, comprise condenser cylindrical shell, the lower inside of cylindrical shell arranges heat exchanger tube, the inner upper of cylindrical shell arranges oil eliminator, described oil eliminator and the air inlet pipe be located on cylindrical shell are connected, described oil eliminator comprises body, this body and air inlet pipe are connected, and be at least Liang Ge branch by connection punishment, each branch is equipped with venthole, the outside of body is arranged with cylindrical filter, is provided with oil-collecting device between cylindrical filter and heat exchanger tube, and oil-collecting device connects oil return pipe.The present invention arranges oil eliminator in the inner upper of condenser, the superheated steam of carrying refrigeration oil next from compressor entered by air inlet pipe first carries out Oil-gas Separation by oil eliminator, and oil eliminator main body is made up of body, and this body is divided into multiple branch, so, the steam entered from air inlet pipe before this one be divided into many, reduce flow velocity, realize basic oil to be separated, and by evenly setting out pore in each branch of body, the refrigerant gas carrying refrigeration oil secretly is made to be uniformly distributed along body and to flow out from body, be convenient at the uniform velocity through cylindrical filter, realize again filtering, overall oil is made to be separated successful, refrigeration oil after separation is taken out of by oil return pipe after being collected by oil-collecting device, refrigerant gas then flows through the heat exchanger tube of below.The present invention is according to the design feature of condenser, the setting position of reasonable arrangement oil eliminator and heat exchanger tube, and can according to concrete condenser structure as the body of oil eliminator main body and cylindrical filter, concrete point number and the length of each branch are set, normally by the symmetric points of connection as Liang Ge branch, particularly adopt Liang Ge branch, namely body is a straight tube, the centre of straight tube is connected as connection place and air inlet pipe, and this structure is compact, and processes and install all very convenient.Also multiple branch can be set according to the actual conditions in condenser inner barrel space.
In technique scheme, connection place of described body and air inlet pipe is positioned at the geometric center point of body.This structure makes body claim symmetrical structure, and so, the steam-energy entered from air inlet pipe is more effectively uniformly distributed in each branch of body.
Further, the end-enclosed of described body, venthole is then evenly arranged on tube wall.Main technical principle of the present invention is the steam reduction of speed entering oil eliminator, and distribute relatively more even and relatively at the uniform velocity flow through cylindrical filter, as a rule, by specific design, as position and shape that each branch sets out pore, this principle can be realized, but the most typical ad hoc structure easily, by the end-enclosed of each for body branch, and the tube wall of branch evenly digging venthole, is one of scheme of best results.
After the sheathed cylindrical filter of described body, with cylinder inboard wall, there is gap.Steam after the convenient oil in described gap is separated passes through.
The internal diameter of described body is less than the internal diameter of air inlet pipe, and the minimum diameter of body is the half of air inlet pipe.This structure makes the steam entered by air inlet pipe effectively be evenly distributed in each branch of body.
Cylindrical filter of the present invention comprises inner core and urceolus, is provided with filtration silk screen between inner core and urceolus, and the barrel of inner core and urceolus is provided with multiple pore.Adopt this structure, essence of the present invention adopts wire gauzee filter, and inner/outer tube can be directly prepared from by porous plate, filters silk screen and be directly entangled in and inner core reaches desired thickness then can.
Described oil-collecting device is located at the below of cylindrical filter, and entirety is arc-shaped flaky body, and its width is larger than the external diameter of cylindrical filter, described oil-collecting device and cylindrical filter, all has gap between cylindrical shell and heat exchanger tube.Common oil-collecting device adopts flat board as base plate, and be obliquely installed, and oil return pipe is arranged on the lowest part of base plate, facilitate the recovery of isolated refrigeration oil like this, the present invention also can adopt similar structure, but as considering the best combination of oil eliminator and condenser structure, oil-collecting device is set to arc-shaped flaky body, namely cylindrical one section, with cylindrical shell, the shape of body and cylindrical filter is roughly identical, be arranged on the below of cylindrical filter, the top of heat exchanger tube, one effectively can reclaim the separation refrigeration oil be attached on cylindrical filter, two inner spaces that can not occupy cylindrical shell.
Further, described oil return pipe is arranged on the center of oil-collecting device, and draws outside cylindrical shell from direction side.Because oil-collecting device cross section is circular arc, so center is minimum point, one end as oil return pipe is arranged on center minimum point, be conducive to reclaiming and be separated refrigeration oil, and oil return pipe is drawn outside cylindrical shell above the side of oil-collecting device, avoid the stringing region such as heat exchanger tube through condenser, make structure compacter.
The present invention is provided with end plate in the pipe end corresponding position with body, and the sectional area of the area ratio body of described end plate is large, and the top and the bottom of end plate are all also welded and fixed with cylindrical shell and oil-collecting device respectively in circular arc, and end and the end plate of described body are welded and fixed.Make oil eliminator and cylindrical shell fix up and down by end plate, make fixed structure the compactest, account for inner barrel space hardly.
Further, the near ports that described body and air inlet pipe are connected also is provided with baffle plate, described baffle plate central aperture, and in tapping and body annular solder, the lower end of baffle plate is welded and fixed by steel bar and oil-collecting device.Body of the present invention and cylindrical filter mainly adopt end plate to fix, but end plate is fixed on the one end away from air inlet pipe connection place, fixing in order to strengthen, at body and the cylindrical filter adjacent one end near air inlet pipe, weld by baffle plate of the present invention, realize further fixing, also meet the demand of compact conformation of the present invention.
The present invention combines the design feature of oil eliminator and condenser fully, and closely, processing and installation are simply for its structure.The filter course thickness of cylindrical filter is little, and circulation area is large, and cross section gas velocity is low, oily good separating effect, and resistance is also smaller.And oil eliminator has the effect of gas distributor concurrently, gas one is divided into many, is conducive to improving heat transfer effect.
Accompanying drawing explanation
Fig. 1 is the Longitudinal cross section schematic of the water-cooled condenser of a kind of built-in oil content of the present invention.
Fig. 2 is the cross sectional representation of the water-cooled condenser of a kind of built-in oil content of the present invention.
In accompanying drawing, 1 is cooling water inlet, 2 is left end socket, 3 is left tube sheet, 4 is exhaust outlet, 5 is gas distributor center pipe, 6 is wire gauzee filter, 7 is gas distributor, 8 is air inlet pipe, 9 is oil return pipe, 10 is wire gauzee filter urceolus, 11 is wire gauzee filter inner core, 12 is gas distributor right end plate, 13 is right tube plate, 14 is right end socket, 15 is coolant outlet, 16 is drainpipe, 17 is liquid refrigerant outlet, 18 is cylindrical shell, 19 is gas distributor first member plate, 20 is oil eliminator right baffle-plate, 21 is the right baffle plate of oil eliminator, 22 for strengthening steel bar in location, 23 is oil drain pan, 24 is heat exchanger tube.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described further.
Structure of the present invention as shown in figure 1 and 2.
This embodiment is a kind of horizontal oil content integrated condenser of fairly large full-liquid type handpiece Water Chilling Units.It is made up of tubular water condenser ' and oil eliminator.This tubular water condenser ' is that cooling water walks tube side, gaseous refrigerant enters from cylindrical shell top, the fixed tube sheet shell-and-tube heat exchanger that post liquefaction is discharged from bottom, it is made up of cylindrical shell 18, left tube sheet 3, right tube plate 13, heat exchanger tube 24, left end socket 2, right end socket 14, air inlet pipe 8 and liquid refrigerant outlet 17 etc.The oil eliminator being built in cylindrical shell 18 inside adopts isolated by filtration mode, is made up of gas distributor center pipe 5, gas distributor 7, wire gauzee filter 6, oil drain pan 23 and oil return pipe 9.Gas distributor center pipe 5 and gas distributor 7 form the body of oil eliminator critical piece of the present invention, and wire gauzee filter 6, wire gauzee filter urceolus 10 and wire gauzee filter inner core 11 form cylindrical filter, and oil drain pan 23 is oil-collecting device.Oil eliminator of the present invention is symmetrical cylindrical, is positioned at the top at cylindrical shell 18 center, and the gap of its upper surface and cylindrical shell 18 inwall is 10-20mm, two ends far from the distance of both sides tube sheet at 30-100mm.Air inlet pipe 8 is connected with gas distributor center pipe 5, the diameter of central tube 5 is 0.7 times of air inlet pipe 8 diameter, with guarantee gas be divided into left and right two bursts time flow velocity substantially remain unchanged, central tube 5 is provided with four pieces of end plates: first member plate 19, right end plate 12, right baffle-plate 20 and right baffle plate 21, left and right end plate is larger, up and down in circular arc, the left and right sides is straight.Middle left baffle 20 and 21 is rounded, and diameter is more bigger than the urceolus 10 of silk screen filter layer.Central tube 5 bores aperture as venthole, the diameter 3-10mm of aperture at a certain distance at first member plate 19 and right baffle-plate 20 and the part between right end plate 12 and right baffle plate 21, gas by the speeds control of aperture at 3-5m/s.Wire gauzee filter 6 is cylindrical, urceolus 10 and inner core 11 are made by porous plate, two ends are welded in left and right end plate and left baffle, its internal diameter 20-60mm larger than gas distributor center pipe 5, fill multiple layer metal silk screen between inner/outer tube, woven wire is arranged on inner core 11 by canoe, when tightening around to use wire during desired thickness, then urceolus 10 is put, then welded end plate 19 and 12.The thickness 25-50mm of silk screen layer.The bottom of built-in oil eliminator is provided with the oil drain pan 23 of a circular arc, its width 10-20mm larger than the diameter of wire gauzee filter.Left and right end plate 19 and 12 top of built-in oil eliminator is welded with cylindrical shell 18 and is located, and bottom is welded with oil drain pan 23 is closely knit, and the end of distributor central tube 5 and silk screen layer inner/outer tube 11 and 10 is all welded with end plate 19 and 12.Oil drain pan 23 and left baffle 20 and 21 are strengthened steel bar 22 be connected with being located, and avoid the flowing stopping refrigeration oil.
The making step of oil eliminator of the present invention is:
Step one, punches after gas distributor center pipe 5 sawing sheet;
Step 2, gas distributor center pipe 5 welds with middle left baffle 20 and 21 hoop, and gas distributor center pipe 5 welds with air inlet pipe 8, makes gas distributor 7;
Step 3, by wire gauzee filter inner core 11 and left baffle 20 and 21 annular solder;
Step 4, is wound around silk screen and tightens;
Step 5, dress silk screen filter layer urceolus 10, and with left baffle 20 and 21 annular solder;
Step 6, the left and right end plate 19 and 12 of gas distributor 7 and gas distributor center pipe 5, wire gauzee filter inner/outer tube 10 and 11 welds;
Step 7, oil drain pan 23 and left and right end plate 19,12 closely knitly weld, and left baffle 20 and 21 and oil drain pan 23 are welded by steel bar 22 to be strengthened;
Step 8, oil eliminator loads cylindrical shell 18, and welded with cylinder inboard wall by end plate 19,12, air inlet pipe 8 is welded with cylindrical shell 18;
Step 9, makes oil return pipe 9, welds after inserting location with cylindrical shell 18.
First the superheated steam carrying refrigeration oil secretly come from compressor is entered body by the present invention, this body is by a closed at both ends, the pipe that side direction has a large amount of aperture is formed, cold-producing medium vertically enters from middle part, be divided into two, the diameter that flow velocity also can reduce body can be reduced like this, improve compactedness.Through the uniform effect of body, gaseous refrigerant can distribute uniformly along tubular axis direction, and gas passes through the speeds control of aperture at 3-5m/s, and flow velocity is too low, easily causes integral dispensing uneven, flow velocity is too high, easily causes local gas velocity too fast, the effect that impact oil is separated.A columnar wire gauzee filter 6 in gas distributor center pipe 5 outer setting as body branch, leave certain gap between wire gauzee filter 6 and gas distributor center pipe 5, thus gas flow section is increased, flow velocity is lower, more evenly.The multi-layer silk screen of the inner/outer tube that wire gauzee filter 6 is made by porous plate and therebetween is formed, and the thickness of silk screen layer is 25-50mm.Bottom is provided with the oil drain pan 23 of a circular arc, and its width is larger than the diameter of wire gauzee filter 6, leaves space, be used as the runner of purer cold-producing medium between the both sides of oil drain pan 23 and cylindrical shell 18.The left and right end plate of built-in oil eliminator is steel plate, and up and down all in circular arc, both sides are vertical, and top is welded with cylindrical shell 18 and located, and bottom is welded with oil drain pan 23 is closely knit, and the end plate welding all therewith of the end of gas distributor center pipe 5 and wire gauzee filter inner/outer tube.Oil drain pan 23 welds with the baffle plate steel bar in the middle part of wire gauzee filter inner/outer tube to be strengthened, and avoids the flowing stopping liquid refrigeration oil.Heat exchanger tube 24 bunchy of condenser is distributed in the bottom of cylindrical shell, and the both sides of oil drain pan 23 can stringing, thus improves compactedness.Oil return pipe 9 is arranged on the center of oil drain pan 23, and from the side at center, direction is drawn, and avoids through cloth area under control.