CN105422419B - A kind of compressor and oil return switching method - Google Patents

A kind of compressor and oil return switching method Download PDF

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Publication number
CN105422419B
CN105422419B CN201510819095.4A CN201510819095A CN105422419B CN 105422419 B CN105422419 B CN 105422419B CN 201510819095 A CN201510819095 A CN 201510819095A CN 105422419 B CN105422419 B CN 105422419B
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China
Prior art keywords
oil
compressor
equalizing pipe
return
pipe road
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CN201510819095.4A
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CN105422419A (en
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刘韵
胡余生
康小丽
单彩侠
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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Zhuhai Gree Energy Saving Environmental Protection Refrigeration Technology Research Center Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02Lubrication
    • F04B39/0207Lubrication with lubrication control systems

Abstract

The present invention discloses a kind of compressor and oil return switching method.Compressor includes return line and oil equalizing pipe road, the arrival end on oil equalizing pipe road and the port of export of return line are connected in the bottom oil sump of compressor, the arrival end of return line is connected to the oil return opening of compressor top oil sump, has default oil level in the bottom oil sump of compressor;Compressor also includes the oil-way switching apparatus being all connected with oil equalizing pipe road and return line, and oil-way switching apparatus has equal oil condition and oil return state.The present invention being capable of quickly oil return and quick oil so that oily equilibration time is greatly decreased, and makes full use of existing oil mass to be distributed between each compressor, effectively reduces injection flow, reduces with oily cost.

Description

A kind of compressor and oil return switching method
Technical field
The present invention relates to compressor field, a kind of particularly compressor, the invention further relates to a kind of oil return switching side Method, particularly a kind of oil return switching method for compressor.
Background technology
With the fast development of multi-joint unit, the Large Copacity and the adjustable air-conditioner set of capacity being made up of multiple compressors should It is more and more wider with scope.Multi-joint unit generally has the characteristics that pipeline is long, drop is big and elbow is more, is run with single compressor Compare, be easy to occur that a certain compressor is oil-poor or poly- oily phenomenon in multi-joint unit, it is each in multiplex system in order to ensure Lubricating oil in compressor is run under the oil level of safety, and the Key technique problem that multi-joint unit needs to solve is exactly to protect Hold reliable and stable oily balancing technique between multiple compressors.
Existing more ripe oily balancing technique is to use oil equalizing pipe structure, by being compressed in compressor housing external connection The oil equalizing pipe of machine blast pipe and compression motor spindle oil sump, will appear from gathering by pressure difference caused by the rate of flow of fluid difference of oil equalizing pipe both ends Lubricating oil in the compression motor spindle oil sump of oily phenomenon is drained into the fluid reservoir of system in time, prevents lubricating oil in a certain compression Aggregation causes other compressors oil-poor in machine, realizes the oil balance in multiplex system.This technology is although simple in construction, but works as When compressor carries out oily balanced according to air-breathing oil return, if oil return is slow inside compressor or exhaust oil shortage ratio is high, it may result in Compression motor spindle oil sump can not be arrived in time from the lubricating oil entrained by compressor air suction, can now cause whole system oil balance Time is grown the problems such as needing injection flow more with system, and system oil equilibration time length means that compressor may operate in oil starvation state Under time length, reduce the reliability of multi-joint unit, injection flow can at most increase the cost of multi-joint unit.
The content of the invention
A kind of compressor and oil return switching method are provided in the embodiment of the present invention, to solve oily equilibration time in the prior art Long, injection flow demand causes the time length that compressor may be operated under oil starvation state more, and injection flow causes to increase multi-joint more The problems such as cost of unit.
To achieve the above object, the present invention provides a kind of compressor, including return line and oil equalizing pipe road, oil equalizing pipe road Arrival end is connected in the bottom oil sump of compressor, and the arrival end of return line is connected to the oil return of compressor top oil sump Mouthful, there is default oil level in the bottom oil sump of compressor;Compressor also includes what is be all connected with oil equalizing pipe road and return line Oil-way switching apparatus, oil-way switching apparatus make returning in return line with when oil level is higher than default oil level in the oil sump of bottom Equal oil condition of the oil stream to oil equalizing pipe road;And when oil level is less than or equal to default oil level, make return line in the oil sump of bottom In oil return flow to the oil return state of bottom oil sump.
Preferably, oil-way switching apparatus also includes magnetic valve, oily end connecting tube and oil sump end connecting tube;Return line The port of export be connected with the entrance of magnetic valve;The first end of oily end connecting tube is connected with the first outlet of magnetic valve, Second end of oily end connecting tube connects with oil equalizing pipe road;The first end of oil sump end connecting tube is connected with the second outlet of magnetic valve Logical, oil sump end the second end of connecting tube connects with bottom oil sump.
Preferably, being provided with fuel level sensor in the bottom oil sump of compressor, fuel level sensor is arranged on default oil level Height.
Preferably, height of the height of default oil level not less than the arrival end on oil equalizing pipe road.
Preferably, compressor also includes the gas exhaust piping positioned at compressor top, the port of export on oil equalizing pipe road and exhaust Pipeline is connected.
Preferably, oil-way switching apparatus includes liquid collecting tank;Liquid collecting tank is connected on oil equalizing pipe road, and by oil equalizing pipe road Arrival end is connected with oil equalizing pipe road;The upper end of liquid collecting tank is connected with return line, and the lower end of liquid collecting tank is returned by liquid collecting tank Flow tube road connects with bottom oil sump.
Preferably, return line extends to the bottom of liquid collecting tank from the upper end of liquid collecting tank.
Preferably, the arrival end on oil equalizing pipe road height and oil sump default oil level it is highly consistent.
Preferably, the diameter of diameter=return line of the arrival end on oil equalizing pipe road<The diameter of liquid collecting tank return line< The diameter on oil equalizing pipe road.
The present invention also provides a kind of oil return switching method of the compressor in any of the above-described technical scheme, oil return switching side Method includes:When oil level is higher than default oil level in the oil sump of bottom, the oil return in return line is set to flow to oil equalizing pipe road to realize Oil;And when oil level is less than or equal to default oil level in the oil sump of bottom, make the oil return in return line flow to bottom oil sump with Realize oil return.
Compressor of the present invention and oil return switching method, by setting return line, oil equalizing pipe road within the compressor And oil-way switching apparatus can realize quick oil return and quick oil so that oily equilibration time is greatly decreased, and makes full use of existing There is oil mass to be distributed between each compressor, effectively reduce injection flow, reduce with oily cost.
Brief description of the drawings
Fig. 1 is structural representation of the compressor of the present invention under quick oil condition;
Fig. 2 is structural representation of the compressor of the present invention under quick oil return state;
Fig. 3 is structural representation of another rotation compressor of the present invention under quick oil condition;
Fig. 4 is structural representation of another compressor of the present invention under quick oil return state;
Fig. 5 is the structural representation of liquid collecting tank of the present invention;
Fig. 6 is the fundamental diagram under quick oil condition of liquid collecting tank of the present invention;
Fig. 7 is the fundamental diagram under quick oil return state of liquid collecting tank of the present invention.
Description of reference numerals:1st, suction line;2nd, compressor;3rd, fuel level sensor;4th, oil sump;5th, oily end connecting tube; 6th, magnetic valve;7th, oil equalizing pipe road;8th, return line;9th, gas exhaust piping;10th, fluid reservoir;11st, liquid collecting tank;12nd, liquid collecting tank return duct Road;13rd, lubricating oil;51st, oil sump end connecting tube;71st, the arrival end on oil equalizing pipe road;72nd, the port of export on oil equalizing pipe road;81st, oil return The arrival end of pipeline.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as the limit to the present invention It is fixed.
Fig. 1 shows a kind of compressor 2, and it includes exterior line part, the exterior line part include suction line 1, Gas exhaust piping 9, oil equalizing pipe road 7 and return line 8, wherein, suction line 1 is located at the top of compressor 2, and gas exhaust piping 9 is located at The top of compressor 2, compressor 2 are connected by gas exhaust piping 9 with fluid reservoir 10, the port of export 72 and the exhaust on oil equalizing pipe road 7 Pipeline 9 is connected, and the arrival end 71 on oil equalizing pipe road 7 is connected to positioned at the discharge chamber of compressor 2 as the lower inlet on oil equalizing pipe road 7 In body bottom oil sump 4;Return line 8 is connected to the oil return opening of the top oil sump of compressor 2, return line 8 by its arrival end 81 The port of export be connected to bottom oil sump 4, there is default oil level in the bottom oil sump 4 of the compressor, can so make The lubricating oil for being used to lubricate each friction pair of the pump housing that must be accumulated in the top oil sump of compressor 2 passes through the arrival end of return line 8 81 enter return line 8.
The compressor also includes the oil-way switching apparatus being all connected with oil equalizing pipe road 7 and return line 8, oil-way switching apparatus With when oil level is higher than default oil level in bottom oil sump 4, the oil return in return line 8 is set to flow to the equal oily on oil equalizing pipe road 7 State;And when oil level is less than or equal to default oil level, the oil return in return line 8 is set to flow to bottom oil sump in bottom oil sump 4 4 oil return state.The oil-way switching apparatus includes magnetic valve 6, oily end connecting tube 5 and oil sump end connecting tube 51, wherein, oil return The port of export of pipeline 8 is connected by magnetic valve 6 with one end of oily end connecting tube 5 and one end of oil sump end connecting tube 51, its In, the connected state of the control piper of magnetic valve 6, it is preferably triple valve or three two three-way electromagnetic valves.In addition, oily end connection The other end of pipe 5 is connected with oil equalizing pipe road 7, and the other end of oil sump end connecting tube 51 is connected to oil sump 4, so enable to from The lubricating oil that oil equalizing pipe road 7 is flowed back is transported in oil equalizing pipe road 7 by the control of magnetic valve 6 by oily end connecting tube 5, can also It is transported to by bottom oil sump end connecting tube 51 in the bottom oil sump 4 of compressor 2, realizes oil return and the switching of equal oil condition, and The influence of the not compressed machine internal gas flow disturbance of oil return process, compressor oil return is rapid, while decreases compressor air-discharging band Oil mass so that air-breathing oil return effect is more preferable.In addition, it is provided with fuel level sensor 3 in the bottom of compressor 2.In this embodiment Fuel level sensor 3 is used for setting the level height of the monitoring bottom oil sump 4 of compressor 2, while by the bottom oil sump 4 of hydraulic compression machine 2 Level height, control magnetic valve 6 are commutated according to the signal of fuel level sensor 3.Wherein, top oil sump refers to compressor top Lubricating oil for lubricating Pump Body Parts and bearing collects accumulation space, and the current return circuit of the part oil sump lubricating oil passes through outside Adapter directly flows back, and reduces the influence of compressor internal disturbance air-flow so that back-flow velocity faster compressor air-discharging with oil mass It is few.
For the position of the arrival end 71 on oil equalizing pipe road 7, when oil level did not had oil equalizing pipe road 7 in the bottom oil sump 4 of compressor 2 During arrival end 71, relative to the rate of flow of fluid (exhaust flow rate) at the port of export 72 on oil equalizing pipe road 7, the arrival end 71 on oil equalizing pipe road The rate of flow of fluid at place is approximately zero, it can be seen from Bernoulli equation, because rate of flow of fluid difference causes hydrostatic pressure head different, Hydrostatic pressure head is big at the arrival end 71 of oil pipe line 7, and hydrostatic head is small at the port of export 72 on oil equalizing pipe road 7, therefore, on oil equalizing pipe road 7 both ends produce pressure difference, and the principle of oil equalizing pipe work is exactly that the profit at the arrival end 71 on oil equalizing pipe road 7 is will be above using this pressure difference Lubricating oil is transported in gas exhaust piping 9, is prevented lubricating oil from being gathered in oil sump 4, is avoided causing other compressor oil starvations in system;When When the level height of the bottom oil sump 4 of compressor 2 is less than at the arrival end 71 on oil equalizing pipe road 7, the lubricating oil in oil sump 4 now can not Gas exhaust piping 9 is entered by oil equalizing pipe road 7, compressor 2 receives the lubricating oil from system by air-breathing oil return, while by fast Fast return line 8 ensures that lubricating oil so will not both can guarantee that compressor 2 by vent strip oil discharge compressor 2 in compressor 2 Bottom oil sump 4 is constantly in default oil level.
For using the exterior line part of above-mentioned compressor 2 oil stream can be lubricated according to the different oil level of oil sump 4 Dynamic control, this control mainly includes two kinds of working conditions, as shown in figure 1, specifically, in a kind of working condition, working as oil When the oil level of oil sump 4 that level sensor 3 monitors is higher than setting oil level value, wherein, the setting value of the oil level of oil sump 4 should be not less than oil equalizing pipe Height of the road 7 in the arrival end 71 of the bottom oil sump 4 of compressor 2.The signal is fed back to magnetic valve 6, control electricity by fuel level sensor 3 Magnet valve 6 commutates, and now magnetic valve 6 cuts off the path between return line 8 and oil sump end connecting tube 51, open return line 8 with The path of oily end connecting tube 5, the lubricating oil to be flowed back from the top oil sump of compressor 2 is by return line 8, oily end connecting tube 5th, oil equalizing pipe road 7 and gas exhaust piping 9 are transported in fluid reservoir 10.So, when in multicomputer system in a certain compressor it is oily When pond oil level is higher than setting value, lubricating oil is transported in fluid reservoir normally through oil equalizing pipe road in the compressor oil sump, meanwhile, Compared to conventional compressor, compression motor spindle oil will not be now back to again from the lubricating oil of compressor top oil sump backflow It is delivered directly in pond in system fluid reservoir, there is quick oil for the compressor, on the other hand for oil starvation Compressor there is quick oil return.
Another working condition of the present embodiment as shown in Figure 2, in another working condition, when the bottom oil sump 4 of compressor 2 When interior level height is less than setting oil level value, the signal is fed back to magnetic valve 6 by fuel level sensor 3, and control magnetic valve 6 changes To now magnetic valve 6 opens the path between return line 8 and oil sump end connecting tube 51, and cut-out return line 8 connects with oily end Path between adapter 5, the lubricating oil to be flowed back from the top oil sump of compressor 2 are straight by return line 8, oil sump end connecting tube 51 Take back and flow in the bottom oil sump 4 of compressor 2.Therefore, when oil sump oil level is less than setting value in a certain compressor in system, lead to The connected state of solenoid valve control return duct and connecting line is crossed, passes through oil return pipe from the lubricating oil of compressor top oil sump backflow Road 8,51 direct quick backflow of oil sump end connecting tube to the bottom of compressor 2, itself backflow make up compressor 2 bottom can be passed through in time The oil mass of oil sump 4, and it is oily to be unlikely to the problems such as slow or vent strip oil be'ss more because compressor itself flows back aggravation compression motor spindle Pond oil mass reduces sharply, and causes oil starvation to endanger in a short time.
It will can so be flowed back in time by return line 8 according to the level height of the bottom oil sump 4 of compressor 2 Lubricating oil is transported to the place needed most.That is, when compressor 2 starts poly- oily, return line 8 does not connect with oil sump 4, and direct It is transported to by oil equalizing pipe road 7 in system, while the lubricating oil in the bottom oil sump 4 of compressor 2 also passes through the row of oil equalizing pipe road 7 simultaneously Go out compressor 2 so that equal oil stream amount is bigger, realizes quick oil;And when compressor 2 starts oil-poor, return line 8 only with pressure The bottom oil sump 4 of contracting machine 2 connects, and is all rapidly transported in oil sump 4 from the lubricating oil of the top oil sump backflow of compressor 2, and bottom The lubricating oil of portion's oil sump 4 can not now be discharged by oil equalizing pipe road 7, ensure that the oil level of oil sump 4 can reach default oil level rapidly.
Therefore, the level height that the fuel level sensor 3 in embodiment as shown in Figure 1, 2 can be set should be not less than compressor Oil equalizing pipe road 7 arrival end 71, the level height design load of fuel level sensor 3 is higher, and the return line 8 of compressor 2 is oily Revolution later, oil return state are early.
In embodiment as shown in Figure 1, 2, the arrival end 81 of return line 8 can with the access of the top oil sump of compressor 2 To be that sealing is accessed in the top oil sump of compressor 2, the lubricating oil in the top oil sump of compressor 2 is in entering by return line 8 Do not revealed when at mouth end 81, this connection status can make the lubricating oil in the top oil sump of compressor 2 have backflow efficiency high and row The characteristics of gas band oil is few, it can also be arranged at the arrival end 81 of return line 8 by opening up draining on the internal face of compressor 2 Hole, the lubricating oil in the oil sump of top is set to be shunted after entering the arrival end 81 of return line 8, a part continues through return line 8 Backflow, another part flow down from oil leak hole along the inwall of compressor 2, pass through clearance backflow between motor stator and the inwall of compressor 2 To the bottom oil sump 4 of compressor 2, part shunting lubricating oil is used for playing a part of part cooling motor.
Fig. 3 shows another embodiment, and the difference of itself and first embodiment is, passes through the liquid collecting tank 11 outside setting Instead of the magnetic valve 6 and fuel level sensor 3 in first embodiment, the structure type of liquid collecting tank 11 described here as shown in figure 5, Specifically, liquid collecting tank 11 on be terminated with return line 8, return line 8 is inserted into the bottom of liquid collecting tank 11 always;Liquid collecting tank 11 Lower end connected by liquid collecting tank return line 12 with the bottom oil sump 4 of compressor 2, for by the lubricating oil among liquid collecting tank 11 return It flow in the bottom oil sump 4 of compressor 2;Liquid collecting tank 11 is arranged in oil equalizing pipe road 7, by the arrival end 71 on oil equalizing pipe road 7 and oil Pipeline 7 is connected, wherein, each pipeline caliber:D71 (diameter of the arrival end 71 on oil equalizing pipe road 7)=d8 (return line 8 it is straight Footpath)<D12 (diameter of liquid collecting tank return line 12)<D7 (diameter on oil equalizing pipe road 7), the installation of the arrival end 71 on oil equalizing pipe road 7 It is consistent highly level height to be preset with the bottom oil sump 4 of compressor 2.When the lubricant level in the bottom oil sump 4 of compressor 2 is higher than equal The arrival end 71 (lubricating oil starts to be collected in the bottom oil sump 4 of compressor 2) of oil pipe line 7, the now lubricating oil in liquid collecting tank 11 Level height is also above the height on oil equalizing pipe road 7, and the one end on oil equalizing pipe road 7 closed by lubricating oil, and the other end is in high speed exhaust In state, because the difference of both ends air velocity causes the both ends of oil equalizing pipe road 7 to form pressure difference, by liquid collecting tank in the presence of pressure difference Unnecessary lubricating oil is transported in gas exhaust piping 9 in the 11 connection bottom oil sumps 4 of compressor 2, until the bottom oil sump 4 of compressor 2 Level height is less than the arrival end 71 on oil equalizing pipe road 7, and now, the lubricating oil in compressor 2 can not be discharged by oil equalizing pipe road 7. As shown in Fig. 3 and Fig. 6 arrows, by using equal oil/displacement configuration of the liquid collecting tank 11 of the present embodiment, when the bottom of compressor 2 oil When the oil level in pond 4 is higher than default oil level, in oil equalizing pipe road 7 in the presence of pressure difference, the lubricating oil in the bottom oil sump 4 of compressor 2 13 are inhaled into liquid collecting tank 11 by arrival end 71, the liquid collecting tank return line 12 on oil equalizing pipe road 7, are returned in the top oil sump of compressor 2 The lubricating oil 13 of stream enters liquid collecting tank 11 by return line 8, and the lubrication in final liquid collecting tank 11 all passes through the row of oil equalizing pipe road 7 Go out.So, in the presence of the both ends pressure difference of oil equalizing pipe road 7, by liquid collecting tank 11 from the bottom oil sump 4 of compressor 2 and top oil sump The lubricating oil of inflow discharges compressor 2 in time, because the arrival end 71 on oil equalizing pipe road 7 can have three tunnels to lubricate by liquid collecting tank 11 Oil 13 flows into path discharge, adds equal oil quality flow.
Such as Fig. 4 and as shown in Fig. 7 arrows, when the oil level of the bottom oil sump 4 of compressor 2 is less than the arrival end 71 on oil equalizing pipe road 7 When, the bottom oil sump 4 of compressor 2 disconnects with oil equalizing pipe road 7 first, and the lubricating oil in bottom oil sump 4 can not be by the row of oil equalizing pipe road 7 Go out, meanwhile, the lubricant level height in liquid collecting tank 11 now can also be less than oil equalizing pipe road 7 and the oil level of 2 bottom oil sump of compressor 4 It is consistent, the lubricating oil to be flowed back by return line 8 can not be discharged by oil equalizing pipe road 7, the top oil sump backflow of compressor 2 Lubricating oil is back in compression motor spindle oil sump in the bottom of liquid collecting tank 11 by liquid collecting tank return line 12, so, compressor bottom Lubricating oil in portion's oil sump and liquid collecting tank cannot be introduced into oil equalizing pipe, and the lubrication to be flowed back by return duct now passes through liquid collecting tank energy Compression motor spindle oil sump, timely make up compressor bottom oil sump capacity are back in time.
The present invention also provides a kind of oil return switching method of aforementioned compressor, including:When oil level is higher than in advance in the oil sump of bottom If during oil level, the oil return in return line is set to flow to oil equalizing pipe road to realize equal oil;And when in the oil sump of bottom oil level be less than or During equal to default oil level, the oil return in return line is set to flow to bottom oil sump to realize oil return.
Embodiments of the invention are only the descriptions carried out to the preferred embodiment of the present invention, not to present inventive concept and Scope is defined, on the premise of design philosophy of the present invention is not departed from, skill of the engineers and technicians to the present invention in this area The all variations and modifications that art scheme is made, all should fall into protection scope of the present invention, the claimed technology contents of the present invention, All record in detail in the claims.

Claims (10)

1. a kind of compressor, including return line (8) and oil equalizing pipe road (7), arrival end (71) connection of the oil equalizing pipe road (7) To in the bottom oil sump (4) of the compressor, the arrival end (81) of the return line (8) is connected on the compressor The oil return opening of portion's oil sump, there is default oil level in the bottom oil sump (4) of the compressor;Characterized in that,
The compressor also includes the oil-way switching apparatus being all connected with the oil equalizing pipe road (7) and the return line (8), institute Oil-way switching apparatus is stated with when oil level is higher than the default oil level in the bottom oil sump (4), makes the return line (8) In oil return flow to the equal oil condition of the oil equalizing pipe road (7);And oil level is less than or equal in the bottom oil sump (4) During the default oil level, the oil return in the return line (8) is set to flow to the oil return state of the bottom oil sump (4).
2. compressor according to claim 1, it is characterised in that the oil-way switching apparatus also include magnetic valve (6), Oily end connecting tube (5) and oil sump end connecting tube (51);
The port of export of the return line (8) is connected with the entrance of the magnetic valve (6);
The first end of the oily end connecting tube (5) is connected with the first outlet of the magnetic valve (6), the oily end connection Second end of pipe (5) connects with the oil equalizing pipe road (7);
The first end of oil sump end connecting tube (51) is connected with the second outlet of the magnetic valve (6), and the oil sump end connects (51) second ends of adapter connect with the bottom oil sump (4).
3. compressor according to claim 1 or 2, it is characterised in that in the bottom oil sump (4) of the compressor Provided with fuel level sensor (3), the fuel level sensor (3) is arranged on the height of the default oil level.
4. compressor according to claim 3, it is characterised in that the height of the default oil level is not less than the oil equalizing pipe The height of the arrival end (71) on road (7).
5. compressor according to claim 4, it is characterised in that the compressor also includes being located at the compressor top Gas exhaust piping (9), the port of export (72) of the oil equalizing pipe road (7) is connected with the gas exhaust piping (9).
6. compressor according to claim 1, it is characterised in that the oil-way switching apparatus includes liquid collecting tank (11);
The liquid collecting tank (11) is connected on the oil equalizing pipe road (7), and by the arrival end (71) of the oil equalizing pipe road (7) and institute Oil equalizing pipe road (7) is stated to be connected;
The upper end of the liquid collecting tank (11) is connected with the return line (8), and the lower end of the liquid collecting tank (11) passes through liquid collecting Tank return line (12) connects with the bottom oil sump (4).
7. compressor according to claim 6, it is characterised in that
The return line (8) extends to the bottom of the liquid collecting tank (11) from the upper end of the liquid collecting tank (11).
8. the compressor according to claim 6 or 7, it is characterised in that the height of the arrival end (71) of the oil equalizing pipe road (7) Spend highly consistent with the default oil level of the oil sump (4).
9. compressor according to claim 8, it is characterised in that the diameter of the arrival end (71) of the oil equalizing pipe road (7) The diameter of=the return line (8)<The diameter of the liquid collecting tank return line (12)<The diameter of the oil equalizing pipe road (7).
A kind of 10. oil return switching method of the compressor any one of claim 1 to 9, it is characterised in that the oil return Switching method includes:When oil level is higher than the default oil level in the bottom oil sump (4), make in the return line (8) Oil return flows to the oil equalizing pipe road (7) to realize oil;And when in the bottom oil sump (4) oil level less than or equal to described During default oil level, the oil return in the return line (8) is set to flow to the bottom oil sump (4) to realize oil return.
CN201510819095.4A 2015-11-20 2015-11-20 A kind of compressor and oil return switching method Active CN105422419B (en)

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Publication number Priority date Publication date Assignee Title
CN110425140A (en) * 2019-08-12 2019-11-08 珠海格力节能环保制冷技术研究中心有限公司 Compressor oil level component and rotor compressor

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CN1697927A (en) * 2003-04-14 2005-11-16 大金工业株式会社 Enclosed compressor
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