CN104848615A - Oil separator - Google Patents
Oil separator Download PDFInfo
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- CN104848615A CN104848615A CN201510013195.8A CN201510013195A CN104848615A CN 104848615 A CN104848615 A CN 104848615A CN 201510013195 A CN201510013195 A CN 201510013195A CN 104848615 A CN104848615 A CN 104848615A
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- Prior art keywords
- pressure vessel
- refrigerant
- vapor phase
- oil
- inlet pipe
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/02—Centrifugal separation of gas, liquid or oil
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/01—Geometry problems, e.g. for reducing size
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
An oil separator separates refrigerating machine oil contained in a gas phase refrigerant by inertia force and centrifugal force. The oil separator includes a cylindrical pressure container, a refrigerant inlet pipe that leads the gas phase refrigerant containing the refrigerating machine oil into the pressure container, and a refrigerant outlet pipe that discharges the gas phase refrigerant from which the refrigerating machine oil is separated. An angle +- between a straight line along the direction of the opening of a delivery port at a tip of the refrigerant inlet pipe introduced into the pressure container and a plane perpendicular to the central axis of the pressure container satisfies 45 DEG +- < 90 DEG .
Description
Technical field
The present invention relates to for the vapor phase refrigerant containing refrigerator oil of discharging from compressor, the oil eliminator with centrifugal force, refrigerator oil is separated by inertia force.
Background technology
Compressor is used in the heat pump cycle of conditioner etc.Further, in order to lubricate each sliding part of this compressor, usually refrigerator oil is used.This refrigerator oil with the cold-producing medium that flows in refrigerant-cycle systems at refrigerant-cycle systems Inner eycle.
Further, the refrigerator oil sucked from the suction side of compressor or the refrigerator oil stored in the outer casing container comprising compressor are fed into each sliding part of compressor inside, for the lubrication of each sliding part.Moreover, refrigerator oil is also fed into the operating room of compressor, by sealing the leakage of the cold-producing medium after anti-devaporation to the gap in operating room.
But in above-mentioned refrigerant-cycle systems, if contain a large amount of refrigerator oil from the cold-producing medium of compressor discharge, then refrigerator oil is easily attached to the internal face of the heat-transfer pipe of heat exchanger.The refrigerator oil being attached to the internal face of heat-transfer pipe can hinder the heat transfer of heat-transfer pipe, becomes the major reason making the heat transfer efficiency of heat exchanger worsen, make the pressure loss increase in addition.
In order to avoid such state of affairs, oil eliminator is set in refrigerant-cycle systems.Refrigerator oil is separated from the cold-producing medium of discharging from compressor by oil eliminator, and makes this refrigerator oil turn back to the suction side of compressor.
In the past, as Patent Document 1, there will be a known and possess refrigerant inlet pipe and refrigerant outlet pipe at the top end socket of pressure vessel, possess the oil eliminator of oil return pipe arrangement at the bottom head of pressure vessel.
What this oil eliminator made to flow into from refrigerant inlet pipe collides from the vapor phase refrigerant of compressor and the mixture of the refrigerator oil internal face towards the drum of pressure vessel, is separated refrigerator oil by inertia force.And then this oil eliminator to make with the vapor phase refrigerant of internal face collision rift and the mixture of refrigerator oil, along internal face High Rotation Speed, to be separated refrigerator oil by centrifugal force.
Prior art document
Patent document 1: Japanese Unexamined Patent Publication 11-173706 publication
Summary of the invention
The problem that invention will solve
But the oil eliminator shown in above-mentioned patent document also has room for improvement.
In view of the foregoing, a unrestriced exemplary embodiments provides a kind of oil eliminator be improved compared with the past.
Other benefits of embodiments of the present invention and advantage will become clear and definite by description and accompanying drawing.These benefits and/or advantage can be realized by each embodiment of disclosed description and accompanying drawing and feature individually, and do not need to realize one or more benefits and/or advantage by all embodiments and feature.
For the means of dealing with problems
Oil eliminator of the present invention is the oil eliminator that a kind of refrigerator oil vapor phase refrigerant comprised is separated, and possesses: the pressure vessel of drum; Refrigerant inlet pipe, the vapor phase refrigerant comprising refrigerator oil imports in pressure vessel by it; And refrigerant outlet pipe, vapor phase refrigerant after it is separated by refrigerator oil is discharged, along be inserted in pressure vessel inside refrigerant inlet pipe top the straight line sending the opening direction of mouth and and pressure vessel central axis plane between be angle [alpha] be 45 °≤α < 90 °.
Overall and detailed description of the invention of the present invention can realize by using any combination of a system, a method and system and method.
Invention effect
According to the present invention, the impact of the inequality of the machining accuracy of the refrigerant inlet pipe of oil eliminator can be reduced, improve the collision separating effect for refrigerator oil and convolution separating effect simultaneously, and make the path length of swirling flow long than ever.
Accompanying drawing explanation
Fig. 1 is the integrally-built refrigerant loop figure of the outdoor unit of the conditioner representing embodiments of the present invention.
Fig. 2 is the figure of the inside represented from oil eliminator top view oil eliminator.
Fig. 3 is the figure of the inside of the oil eliminator represented to observe oil eliminator from the arrow A direction of Fig. 2.
Fig. 4 is the figure of the inside of the oil eliminator represented to observe oil eliminator from the arrow B direction of Fig. 2.
Fig. 5 represents that the position sending mouth of refrigerant inlet pipe is on the figure of the impact of the separation rate of refrigerator oil.
Fig. 6 is the motion pattern of the example representing vapor phase refrigerant stream.
Fig. 7 is the figure of the structure of the oil eliminator represented in the past.
Label declaration
10 oil eliminators
11 refrigerant inlet pipes
12 sweeps
13 send mouth
14 refrigerant outlet pipes
15 top ends
20 pressure vessels
21 upper vessel portion
22 lower vessel portion
23 top end sockets
24 bottom heads
25 oil export pipes
26 foots
27,28 through holes
29 container trunks
30 compressors
31 outdoor heat converters
32 expansion valves
33 cross valves
34 receiving magazines
35 accumulator
41 suction lines
42A discharge pipe
42B discharge pipe
43 pipelines
44 refrigerant pipings
45 liquid pipes
46 tracheaes
47 oil return pipes
100 outdoor units
Detailed description of the invention
Present inventor studies with keen determination to oil eliminator in the past, obtains following opinion.
In the oil eliminator shown in above-mentioned patent document 1, insert refrigerant inlet pipe at the top end socket of pressure vessel.Further, refrigerant inlet pipe send exit bend, this opening direction sending mouth is towards the internal face being in the slightly oil eliminator of below sending mouth.Further, the internal face sending vapor phase refrigerant that mouth sends and pressure vessel from this collides, and circles round in pressure vessel.
But, make machining accuracy during exit bend of sending of refrigerant inlet pipe there is inequality.Therefore, in such oil eliminator, there are the following problems: the swirling flow of the vapor phase refrigerant in pressure vessel towards in can produce individual difference.
In addition, in such oil eliminator, also there are the following problems: be difficult to improve the collision separating effect for refrigerator oil and convolution separating effect simultaneously.Fig. 7 is the figure of the structure of the oil eliminator 1 represented in the past.Fig. 7 is the sectional view of the oil eliminator 1 of pressure vessel 20 by possessing drum when cutting off along the face of the central axis with pressure vessel 20.
This oil eliminator 1 possesses pressure vessel 20, refrigerant inlet pipe 11 and refrigerant outlet pipe 14.As mentioned above, the opening direction of mouth 13 is sent towards the internal face being in the slightly oil eliminator of below sending mouth 13.
At this, preferably greatly to a certain degree, distance Y is preferably less for the distance X in Fig. 7.Distance X, Y be respectively from send mouth 13 to oil eliminator 1 internal face, distance on direction that Distance geometry above-mentioned opening direction is vertical with above-mentioned opening direction.
When increasing distance X, flowing into vapor phase refrigerant stream in pressure vessel 20 spread, so refrigerator oil becomes easily be attached to internal face from sending mouth 13.Therefore, it is possible to obtain the high collision separating effect realized by inertia force.
In addition, when reducing distance Y, in vapor phase refrigerant along internal face convolution, by centrifugal force separate under refrigerator oil condition, the time of refrigerator oil arrival internal face shortens.Therefore, it is possible to obtain the high convolution separating effect realized by centrifugal force.
But, in above-mentioned oil eliminator 1, increase distance X and reduce the relation that distance Y is in shifting (tradeoff).That is, even if in horizontal plane, the position of mouth 13 is sent in adjustment, when increasing distance X, distance Y also can become large, and on the contrary, when reducing distance Y, distance X also can diminish, so be difficult to improve collision separating effect and convolution separating effect simultaneously.
And then in this oil eliminator 1, owing to sending the opening direction of mouth 13 towards the internal face being in the slightly oil eliminator 1 of below sending mouth 13, so the swirling flow of vapor phase refrigerant arrives the bottom of pressure vessel 20 in advance, the path length of swirling flow shortens.Therefore, refrigerator oil can not be separated sometimes fully.
So present inventor contemplates following oil eliminator.
Oil eliminator of the present invention is the oil eliminator that a kind of refrigerator oil vapor phase refrigerant comprised is separated, and possesses: the pressure vessel of drum; Refrigerant inlet pipe, the vapor phase refrigerant comprising described refrigerator oil imports in described pressure vessel by it; And refrigerant outlet pipe, vapor phase refrigerant after separated for described refrigerator oil is discharged by it, along be inserted in described pressure vessel inside described refrigerant inlet pipe top the straight line sending the opening direction of mouth and and described pressure vessel central axis plane between be angle [alpha] be 45 °≤α < 90 °.
Thereby, it is possible to suppression sends the opening direction of mouth because of the inequality of the machining accuracy of the refrigerant inlet pipe of oil eliminator than horizontal direction more down.In addition, owing to sending the opening direction of mouth upward, so produce the swirling flow via the top of pressure vessel, the path of vapor phase refrigerant is compared with the past elongated.In addition, the distance X shown in Fig. 7 can be adjusted in vertical plane upward by the opening direction that makes to send mouth and adjust angle [alpha], can while reduction distance Y increase distance X.If 45 °≤α, then send the end face of opening direction close to pressure vessel of mouth, or towards end face, distance X can be increased further.That is, the collision separating effect for refrigerator oil and convolution separating effect can be improved simultaneously.
Below, with reference to accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the integrally-built refrigerant loop figure of the outdoor unit 100 of the conditioner representing embodiments of the present invention.In addition, the outdoor unit 100 shown in Fig. 1 represents the example can applying the conditioner of oil eliminator 10 of the present invention, and the range of application of this oil eliminator 10 is not limited to such conditioner.
Outdoor unit 100 possesses the compressor (DC frequency-changeable compressor) 30 of ability changeable type, oil eliminator 10, outdoor heat converter 31, expansion valve 32, cross valve 33, receiving magazine 34 and accumulator 35.
The suction inlet of compressor 30 is connected with the suction line 41 extended via accumulator 35.In addition, the outlet of compressor 30 is connected with discharge pipe 42A.Discharge pipe 42A is connected with oil eliminator 10, and the discharge pipe 42B extended via oil eliminator 10 is connected with cross valve 33.
One end of outdoor heat converter 31 is communicated with discharge pipe 42B by cross valve 33, or is communicated with in one end of outdoor heat converter 31 and the pipeline 43 that is connected with the suction line 41 of compressor 30.In addition, the discharge pipe 42B extended via oil eliminator 10 is communicated with tracheae 46 by cross valve 33, or is communicated with tracheae 46 by the pipeline 43 be connected with the suction line 41 of compressor 30 via accumulator 35.
The other end of outdoor heat converter 31 is connected with expansion valve 32 and receiving magazine 34, and then is connected with liquid pipe 45 via refrigerant piping 44.
In addition, oil eliminator 10 is connected with the oil return pipe 47 of the suction line 41 refrigerator oil remained in oil eliminator 10 being turned back to compressor 30.
Above-mentioned refrigerator oil is the lubrication oil of the compressor 30 that the vapor phase refrigerant of discharging from compressor 30 comprises.Refrigerator oil is separated from the cold-producing medium of discharging from compressor 30 by oil eliminator 10, isolated refrigerator oil is turned back to the suction side of compressor 30, and the vapor phase refrigerant after removing refrigerator oil is supplied to cross valve 33.
In addition, outdoor unit 100 is connected with indoor unit (not shown) with tracheae 46 by liquid pipe 45.The conditioner of present embodiment is configured to make cold-producing medium circulate between outdoor unit 100 and indoor unit, carries out cooling operation by switching cross valve 33 or heats running.
Then, the oil eliminator 10 that conditioner uses is described.Fig. 2 is the figure of the inside represented from the oil eliminator 10 top view oil eliminator 10, to be the figure of the inside of the oil eliminator 10 represented to observe oil eliminator 10 from the arrow A direction of Fig. 2, Fig. 4 be Fig. 3 represents the figure of the inside of the oil eliminator 10 to observe oil eliminator 10 from the arrow B direction of Fig. 2.
As shown in Fig. 2, Fig. 3 and Fig. 4, oil eliminator 10 possesses the pressure vessel (oil eliminator main body) 20 of the closed container as drum.Pressure vessel 20 is made up of upper vessel portion 21, lower vessel portion 22 and container trunk 29.
Upper vessel portion 21 and container trunk 29, lower vessel portion 22 and container trunk 29 combine respectively by welding etc., each other that opening portion is airtight.Top end socket 23 is integrally formed with on upper vessel portion 21.In addition, below lower vessel portion 22, bottom head 24 is integrally formed with.
Top end socket 23 is provided with refrigerant inlet pipe 11 and refrigerant outlet pipe 14.At this, in Fig. 2, Fig. 3, Fig. 4, not illustrate only the outer wall of refrigerant inlet pipe 11 and refrigerant outlet pipe 14, also show inwall.
Refrigerant inlet pipe 11 is connected with the discharge pipe 42A extended from the outlet of compressor 30.Further, the vapor phase refrigerant comprising refrigerator oil of being discharged by compressor 30 by refrigerant inlet pipe 11 is imported in pressure vessel 20.
Refrigerant outlet pipe 14 is connected with the discharge pipe 42B be connected with cross valve 33, and the vapor phase refrigerant after refrigerator oil is separated by refrigerant outlet pipe 14 is discharged to the outside of pressure vessel 20.
In addition, bottom head 24 is provided with oil export pipe 25.Oil export pipe 25 is connected with oil return pipe 47, by oil export pipe 25, the refrigerator oil in pressure vessel 20 is discharged to the outside of pressure vessel 20.
In addition, the lower vessel portion 22 of pressure vessel 20 is provided with 2 foots 26.The upper end of foot 26 is engaged with the outer peripheral face of lower vessel portion 22 by welding etc.The bottom of foot 26 is bent into parallel with ground plane (base plate of outdoor unit 100).That is, foot 26 is formed as roughly L-shaped shape.
Pressure vessel 20 is configured to spaced apart under the state erected by foot 26 and between ground plane and longitudinally arranges.In addition, although be set to existence 2 foots 26 at this, foot 26 also can be more than 3.
In addition, refrigerant inlet pipe 11 and refrigerant outlet pipe 14 are arranged in the mode that the central shaft AX of the pressure vessel 20 with drum is almost parallel, with the mode through top end socket 23 of roughly vertical.Insertion top, the position end socket 23 that refrigerant inlet pipe 11 is departing from from the center C of pressure vessel 20.On the other hand, refrigerant outlet pipe 14 is at insertion top, the position end socket 23 of the center C of pressure vessel 20.
At this, be formed respectively for the through hole 27,28 that refrigerant inlet pipe 11, refrigerant outlet pipe 14 insert at top end socket 23.Insert refrigerant inlet pipe 11, refrigerant outlet pipe 14 respectively at through hole 27,28, carry out soldering to seal to the periphery of refrigerant inlet pipe 11 and refrigerant outlet pipe 14 is all-round.
In addition, refrigerant inlet pipe 11 has sweep 12.Through top end socket 23, the refrigerant inlet pipe 11 extending to the inside of pressure vessel 20 in the mode of roughly vertical bend to U-shaped in pressure vessel 20, send the opening direction sending mouth 13 of vapor phase refrigerant upward.At this, opening direction is alternatively that vapor phase refrigerant is from the direction sending mouth 13 outflow.
Specifically, refrigerant inlet pipe 11 is formed as: along the scope sending the angle [alpha] between the straight line of opening direction of mouth 13 and the plane H vertical with the central shaft AX of pressure vessel 20 being and be contained in 45 °≤α < 90 °.
Such as, Fig. 3 represents the opening direction of sending mouth 13 situation towards the sweep of the top end socket 23 of pressure vessel 20.In this case, collide from the sweep sending vapor phase refrigerant that mouth 13 sends and pressure vessel 20.Then, vapor phase refrigerant stream is separated into the vapor phase refrigerant stream F2 of the vapor phase refrigerant stream F1 to the more top movement of pressure vessel 20 and the more below movement to pressure vessel 20.
At this, when angle [alpha] becomes more than 45 ° of degree, vapor phase refrigerant stream F1 proportion becomes more than vapor phase refrigerant stream F2 proportion.Vapor phase refrigerant stream F1's until from refrigerant outlet pipe 14 flow out path length longer than vapor phase refrigerant stream F2, therefore, it is possible to be separated more refrigerator oil.
In addition, when angle [alpha] becomes more than 45 ° of degree, more than the velocity component of the horizontal direction of vapor phase refrigerant is become from the velocity component of the vertical direction sending the vapor phase refrigerant that mouth 13 is sent.Therefore, when the side inner walls of vapor phase refrigerant and pressure vessel 20 there occurs collision, vapor phase refrigerant is by the more top of pilot pressure container 20 efficiently.In addition, the dynamic loss of energy of vapor phase refrigerant stream is also inhibited.
And then owing to angle [alpha] to be set to the value in above-mentioned scope, so when forming sweep 12 at refrigerant inlet pipe 11, vapor phase refrigerant can be collided with the internal face in the outside of sweep 12.Also refrigerator oil can be separated from vapor phase refrigerant thus.
As from the foregoing, in this oil eliminator 10, refrigerant inlet pipe 11 is formed as the scope that angle [alpha] is contained in 45 °≤α < 90 °.
In addition, also the mesh-shape components such as well strainer can be set in the inside of refrigerant inlet pipe 11 of the upstream side being in sweep 12.Thereby, it is possible to be separated from vapor phase refrigerant by refrigerator oil to a certain extent by mesh-shape component, the oily separative efficiency of oil eliminator 10 entirety can be improved further.
And then, the position configuration refrigerant inlet pipe 11 of the relation of D/2≤x≤1.6D is preferably met at the distance x from the internal face of pressure vessel 20 to the center sending mouth 13.At this, D is the internal diameter of refrigerant inlet pipe 11.
Fig. 5 represents that the position sending mouth 13 of refrigerant inlet pipe 11 is on the figure of the impact of the separation rate of refrigerator oil.The longitudinal axis of the chart shown in Fig. 5 is the separation rate of refrigerator oil, and transverse axis is the ratio of distance x relative to the internal diameter L of pressure vessel 20.In addition, the D recorded in Fig. 5 is the internal diameter of refrigerant inlet pipe 11.This result is obtained by Monte Carlo simulation.
As shown in Figure 5, along with ratio x/L diminishes, the separation rate of refrigerator oil becomes large.This is because: vapor phase refrigerant along internal face convolution and under being separated refrigerator oil condition by centrifugal force, send the internal face of mouth 13 the closer to pressure vessel 20, then the time of refrigerator oil arrival internal face is shorter, and refrigerator oil is more easily caught by internal face.
At this, the separation rate (when ratio x/L is 7.3) when distance x is D/2 of refrigerator oil presents maximum 100%.This is the situation of the contact internal walls of refrigerant inlet pipe 11 and pressure vessel 20.In addition, the separation rate in the specification required by oil eliminator 10 is the value of more than 85%.This separation rate when distance x be 1.6D (ratio x/L is 23.0) below reach.Thus, this scope of D/2≤x≤1.6D is set.
In addition, refrigerator oil mainly when the sweep 12 of vapor phase refrigerant by refrigerant inlet pipe 11, be separated from vapor phase refrigerant when the vapor phase refrigerant flowed out from refrigerant inlet pipe 11 is collided with top end socket 23 and when vapor phase refrigerant is circled round in pressure vessel 20.
In this oil eliminator 10, when the sweep 12 of vapor phase refrigerant by refrigerant inlet pipe 11, general 20% of the refrigerator oil that vapor phase refrigerant comprises can be separated.In addition, assuming that: collided by vapor phase refrigerant and top end socket 23, then vapor phase refrigerant circle round in pressure vessel 20, not having at sweep 12 general 80% of the refrigerator oil removed can be separated.
In this case, the separation rate of oil eliminator 10 entirety becomes about 85%.The lower limit 85% of the separation rate in above-mentioned specification determines according to such situation.
In addition, the opening direction sending mouth 13 of refrigerant inlet pipe 11 is preferably not parallel with the normal direction of internal face of the pressure vessel 20 being in this opening direction.When the opening direction sending mouth 13 is parallel with the normal direction of internal face of the pressure vessel 20 being in this opening direction, can collide from vertical direction and internal face from sending the vapor phase refrigerant that mouth 13 sends, the dynamic loss of energy of vapor phase refrigerant becomes large.
But, by the opening direction sending mouth 13 and the normal direction of internal face of the pressure vessel 20 being in this opening direction are set to non-parallel, the direction sent beyond mouth 13 can be partial to from sending vapor phase refrigerant that mouth 13 sends and flow.Its result, can not lose kinetic energy, can produce swirling flow at a high speed.
On the other hand, the center C of refrigerant outlet pipe 14 through top end socket 23, its top ends 15 extends to sends mouth 13 on the lower than refrigerant inlet pipe 11.The opening direction of this top ends 15 is vertical directions down.Like this, refrigerant outlet pipe 14 is configured to not interfere with refrigerant inlet pipe 11.
Then, the action of this oil eliminator 10 is described.The vapor phase refrigerant of discharging from compressor 30 to be directed to the pressure vessel 20 of oil eliminator 10 via discharge pipe 42A and refrigerant inlet pipe 11.As previously mentioned, this vapor phase refrigerant comprises refrigerator oil.
The vapor phase refrigerant that the sweep 12 of refrigerant inlet pipe 11 bends to the high temperature of discharging from compressor 30 is sent along the inner peripheral surface of pressure vessel 20.Therefore, send vapor phase refrigerant that mouth 13 sends after becoming the collision jet collided with top end socket 23 from refrigerant inlet pipe 11, become the vapor phase refrigerant stream of the inner peripheral surface fierceness convolution along pressure vessel 20.
The density of the density ratio vapor phase refrigerant of the refrigerator oil that the vapor phase refrigerant becoming collision jet comprises is high, so refrigerator oil is being separated from vapor phase refrigerant by inertia force with during container collision with wall.Even if so also disperse in the outer radius direction of unsegregated refrigerator oil by centrifugal force to pressure vessel 20, be separated from vapor phase refrigerant, described centrifugal force is the centrifugal force produced by the convolution of vapor phase refrigerant.
As previously mentioned, refrigerant inlet pipe 11 is formed as the scope that angle [alpha] is contained in 45 °≤α < 90 °.In this case, the collision jet of vapor phase refrigerant and the end face of top end socket 23 collide, and produce swirling flow from this end face.Therefore, it is possible to effectively utilize the height of pressure vessel 20 to extend the path length of swirling flow, so the separation rate of refrigerator oil can be improved.
In addition, when carrying out processing to make the opening direction sending mouth 13 of refrigerant inlet pipe 11 to become horizontal direction, sending mouth 13 may because of the inequality of machining accuracy than horizontal direction a little down.In this case, also become down from the swirling flow sending the vapor phase refrigerant that mouth 13 is sent, the path length of the swirling flow of vapor phase refrigerant is not enough, and refrigerator oil may can not be separated fully.
On the other hand, in this oil eliminator 10, the opening direction sending mouth 13 making refrigerant inlet pipe 11, makes angle [alpha] become value in the scope of 45 °≤α < 90 ° than horizontal direction more upward.Therefore, it is possible to the opening direction preventing from sending mouth 13 because of the inequality of machining accuracy than horizontal direction more down, therefore, the path length of the swirling flow of vapor phase refrigerant is compared with the past elongated, can improve the separation rate of refrigerator oil.
In addition, in this oil eliminator 10, the internal face of mouth 13 close to pressure vessel 20 is sent due to what can make refrigerant inlet pipe 11, so the particulate that can shorten refrigerator oil moved to by centrifugal force pressure vessel 20 internal face, caught by internal face till time, described centrifugal force is the centrifugal force produced by swirling flow.Thereby, it is possible to improve the separation rate of refrigerator oil further.
In addition, when refrigerant inlet pipe 11 is configured to contact with the internal face of pressure vessel 20, preferably refrigerant inlet pipe 11 and pressure vessel 20 are welded.Thereby, it is possible to suppress the generation of vibration.
And then, in this oil eliminator 10, the distance of the opening surface sending mouth 13 of refrigerant inlet pipe 11 and the end face of top end socket 23 can be obtained fully.Thereby, it is possible to make to spread before the end face arriving top end socket 23 from the vapor phase refrigerant that mouth 13 sends of sending of refrigerant inlet pipe 11.
Its result, the scope that the end face that can expand vapor phase refrigerant and top end socket 23 collides, the effect that the particle that significantly can improve refrigerator oil is caught by the end face of top end socket 23.
In addition, inner at pressure vessel 20, the refrigerator oil be separated from vapor phase refrigerant by centrifugal force is flowed down downwards because of deadweight, accumulates in the lower vessel portion 22 of pressure vessel 20.Then, refrigerator oil exports to the outside of pressure vessel 20 from the oil export pipe 25 arranged in the bottom of pressure vessel 20, turns back to the suction inlet of compressor 30 via oil return pipe 47.
On the other hand, the liquid level space by the top of the refrigerator oil that the lower vessel portion 22 that the vapor phase refrigerant after the inside cold machine oil of pressure vessel 20 is separated accumulates in specific pressure container 20 accumulates.Then, this vapor phase refrigerant enters refrigerant outlet pipe 14, is supplied to cross valve 33 via discharge pipe 42B.
At this, refrigerant outlet pipe 14 is in the central authorities of pressure vessel 20, so can not upset the vapor phase refrigerant stream that the inner peripheral surface along pressure vessel 20 circles round.In addition, the top ends 15 of refrigerant outlet pipe 14 is in the central authorities of the vapor phase refrigerant stream that the inner peripheral surface along pressure vessel 20 circles round, so the refrigerator oil dispersed can be suppressed to derive from top ends 15, discharge pipe 42B can be guided to by almost removing completely the vapor phase refrigerant after refrigerator oil.
Fig. 6 is the motion pattern of the example representing vapor phase refrigerant stream.This motion pattern obtains according to the structure of numerical simulation.
As shown in Figure 6, collide from the vapor phase refrigerant of refrigerant inlet pipe 11 outflow and the end face of oil eliminator 10.Then, vapor phase refrigerant declines while convolution in oil eliminator 10, and then rises.Refrigerator oil is separated from vapor phase refrigerant in this process, and the vapor phase refrigerant after refrigerator oil is separated flows out from oil eliminator 10 via refrigerant outlet pipe 14.
In addition, in the above-described embodiment, although refrigerant inlet pipe 11 imports to pressure vessel 20 inside from top end socket 23, be not limited thereto.As long as along send mouth 13 opening direction straight line and and pressure vessel 20 central axis plane between be angle [alpha] meet 45 °≤α < 90 °, refrigerant inlet pipe 11 also can be the form imported to from the sidewall of pressure vessel 20 or bottom (bottom head 24) in pressure vessel 20.
As mentioned above, the 1st technical scheme of the present invention provides a kind of oil eliminator, and the oil eliminator 10 that refrigerator oil vapor phase refrigerant comprised is separated possesses: the pressure vessel 20 of drum; Refrigerant inlet pipe 11, the vapor phase refrigerant comprising refrigerator oil imports in pressure vessel 20 by it; And refrigerant outlet pipe 14, vapor phase refrigerant after it is separated by refrigerator oil is discharged, along be inserted in pressure vessel 20 inside refrigerant inlet pipe 11 top the straight line sending the opening direction of mouth 13 and and pressure vessel 20 central axis plane between be angle [alpha] be 45 °≤α < 90 °.
According to this structure, vapor phase refrigerant flows out obliquely upward from refrigerant inlet pipe 11 and collides with pressure vessel 20, and the ratio arriving the vapor phase refrigerant at the top of pressure vessel 20 becomes large.Then, vapor phase refrigerant flows downward from the top of pressure vessel 20 while convolution.
Thus, even if the machining accuracy of refrigerant inlet pipe 11 exists uneven, vapor phase refrigerant also directly can not flow out downwards from refrigerant inlet pipe 11, can reduce the impact of the inequality of machining accuracy.In addition, also can improve the collision separating effect for refrigerator oil and convolution separating effect simultaneously, and make the path of swirling flow long than ever.
In addition, 2nd technical scheme of the present invention provides a kind of oil eliminator, in the 1st technical scheme, when the internal diameter of refrigerant inlet pipe 11 is set to D, the distance x sending the center of mouth 13 from the internal face of pressure vessel 20 to refrigerant inlet pipe 11 meets the relation of D/2≤x≤1.6D.According to this structure, the time till refrigerator oil arrival internal face can be shortened, so can significantly improve oily separation rate.
In addition, the 3rd technical scheme of the present invention provides a kind of oil eliminator, and in the 1st technical scheme or the 2nd technical scheme, the opening direction sending mouth 13 of refrigerant inlet pipe 11 is not parallel with the normal direction of internal face of the pressure vessel 20 being in this opening direction.According to this structure, can be partial to the direction sent beyond mouth 13 from sending vapor phase refrigerant that mouth 13 sends and flow, so can suppress dynamic loss of energy, its result, can produce swirling flow at a high speed.
In addition, the 4th technical scheme of the present invention provides a kind of oil eliminator, in arbitrary technical scheme of the 1st technical scheme ~ the 3rd technical scheme, sends the sweep of opening direction towards the top end socket 23 of pressure vessel 20 of mouth 13.According to this structure, by the top of vapor phase refrigerant pilot pressure container 20 smoothly, the situation of the kinetic energy losing vapor phase refrigerant can be suppressed.
In addition, in the 5th technical scheme of the present invention, in arbitrary technical scheme of the 1st technical scheme ~ the 4th technical scheme, refrigerant inlet pipe 11 has sweep 12, and the inside of refrigerant inlet pipe 11 of the upstream side being in this sweep 12 is provided with mesh-shape component.According to this structure, to a certain extent refrigerator oil can be separated from vapor phase refrigerant by mesh-shape component, oily separative efficiency can be improved further.
In addition, in the 6th technical scheme of the present invention, in arbitrary technical scheme of the 1st technical scheme ~ the 5th technical scheme, refrigerant outlet pipe 14 is connected with pressure vessel 20 on the central shaft AX of pressure vessel 20, and refrigerant inlet pipe 11 is connected with pressure vessel 20 in the position of departing from from the central shaft of pressure vessel 20.According to this structure, the situation upsetting the vapor phase refrigerant stream circled round along the inner peripheral surface of pressure vessel 20 can be suppressed, the refrigerator oil dispersed can also be suppressed to derive from refrigerant outlet pipe 14.
In addition, above-mentioned embodiment only applies an example of concrete technical scheme of the present invention, does not limit the present invention.That is, also the present invention can be implemented with technical scheme different from the embodiment described above.
Such as, in the above-described embodiment, although situation oil eliminator 10 being used in the conditioner of the compressor 30 possessing a frequency conversion type is illustrated, but be not limited thereto, oil eliminator 10 also can be used in possesses the compressor of multiple stage frequency conversion type and the conditioner of constant speed compressor.In addition, oil eliminator 10 also can be used in the conditioner of gas heat pump type.
Utilizability in industry
Oil eliminator of the present invention is suitable for use in the oil eliminator of refrigerator oil separation vapor phase refrigerant comprised.
Claims (6)
1. an oil eliminator, is the oil eliminator that refrigerator oil vapor phase refrigerant comprised is separated, possesses:
The pressure vessel of drum;
Refrigerant inlet pipe, the vapor phase refrigerant comprising described refrigerator oil imports in described pressure vessel by it; And
Refrigerant outlet pipe, the vapor phase refrigerant after separated for described refrigerator oil is discharged by it,
Along be inserted in described pressure vessel inside described refrigerant inlet pipe top the straight line sending the opening direction of mouth and and described pressure vessel central axis plane between be angle [alpha] be 45 °≤α < 90 °.
2. oil eliminator according to claim 1,
When the internal diameter of described refrigerant inlet pipe is set to D, meet the relation of D/2≤x≤1.6D from the internal face of described pressure vessel to the described distance x sending the center of mouth.
3. oil eliminator according to claim 1 and 2,
The described opening direction sending mouth is not parallel with the normal direction of internal face of the described pressure vessel being in this opening direction.
4. oil eliminator according to claim 1 and 2,
The described sweep of opening direction towards the end socket of described pressure vessel sending mouth.
5. oil eliminator according to claim 1 and 2,
Described refrigerant inlet pipe, for sweep, is provided with mesh-shape component in the inside of described refrigerant inlet pipe of the upstream side being in this sweep.
6. oil eliminator according to claim 1 and 2,
Described refrigerant outlet pipe is connected with this pressure vessel on the central shaft of described pressure vessel, and the position that described in described refrigerant inlet Guan Cong, the central shaft of pressure vessel departs from is connected with this pressure vessel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014025469 | 2014-02-13 | ||
| JP2014-025469 | 2014-02-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104848615A true CN104848615A (en) | 2015-08-19 |
| CN104848615B CN104848615B (en) | 2019-05-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510013195.8A Active CN104848615B (en) | 2014-02-13 | 2015-01-12 | Oil eliminator |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2910875B1 (en) |
| JP (1) | JP6403061B2 (en) |
| KR (1) | KR102183547B1 (en) |
| CN (1) | CN104848615B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108168165B (en) * | 2018-02-13 | 2020-04-24 | 天津商业大学 | Gas-liquid oil separator of fluorine refrigerating system |
| JP7358833B2 (en) * | 2019-08-13 | 2023-10-11 | 富士電機株式会社 | oil separation equipment |
| JP7453517B2 (en) * | 2020-02-27 | 2024-03-21 | 東亜ディーケーケー株式会社 | sand filtration unit of sand filtration equipment |
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2014
- 2014-12-16 JP JP2014254262A patent/JP6403061B2/en active Active
- 2014-12-17 KR KR1020140182248A patent/KR102183547B1/en active IP Right Grant
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2015
- 2015-01-12 CN CN201510013195.8A patent/CN104848615B/en active Active
- 2015-01-30 EP EP15153295.9A patent/EP2910875B1/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2015166668A (en) | 2015-09-24 |
| EP2910875A1 (en) | 2015-08-26 |
| JP6403061B2 (en) | 2018-10-10 |
| KR102183547B1 (en) | 2020-11-26 |
| KR20150095550A (en) | 2015-08-21 |
| EP2910875B1 (en) | 2024-03-06 |
| CN104848615B (en) | 2019-05-14 |
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