CN105351202A - Oil return control system of scroll compressor - Google Patents
Oil return control system of scroll compressor Download PDFInfo
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- CN105351202A CN105351202A CN201510755767.XA CN201510755767A CN105351202A CN 105351202 A CN105351202 A CN 105351202A CN 201510755767 A CN201510755767 A CN 201510755767A CN 105351202 A CN105351202 A CN 105351202A
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- oil
- scroll
- compressor
- oil separator
- fixed scroll
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Abstract
The invention provides an oil return control system of a scroll compressor. The oil return control system comprises the scroll compressor and an oil separator. The scroll compressor comprises a shell and a scroll compressor assembly arranged in the shell. According to the scroll compressor assembly, a fixed scroll disc and a movable scroll disc are combined to form a scroll compression cavity, the fixed scroll disc is provided with a fixed scroll disc air inlet and a fixed scroll disc exhaust port, and the fixed scroll disc air inlet and the fixed scroll disc exhaust port are communicated with the scroll compression cavity; a compressor air inlet pipe is connected to the fixed scroll disc air inlet, and the fixed scroll disc exhaust port enables the scroll compression cavity to be communicated with the internal space of the shell; the fixed scroll disc is further provided with an oil inlet communicated with the scroll compression cavity, and the oil inlet is connected with an oil inlet pipe; the oil separator is provided with an oil separator air inlet, an oil separator exhaust port and an oil separator oil outlet, an end pipe of a compressor exhaust pipe is connected to the oil separator air inlet, and the oil separator oil outlet is communicated with the oil inlet pipe through an oil return pipe. By means of the oil return control system, the operation efficiency and reliability of the compressor can be remarkably improved, and the capacity and energy efficiency of a whole machine of an air conditioner system can be remarkably improved.
Description
Technical field
The present invention relates to compressor arrangement and refrigeration technology, the control of specifically compressor and air-conditioning system oil return.
Background technique
For general air-conditioning system, when practical application for guarantee compressor not oil starvation run and causing trouble, or (with) refrigerator oil brings heat exchanger into refrigerant and causes heat transfer effect to be deteriorated, and often arranges oil separator in systems in which.Generally, compressor air-discharging is to oil separator, and oil is separated with refrigerant by oil separator in air-conditioning system oil return, and the oil separated is back to suction side (low voltage side) pipeline or gas-liquid separator.Be the compressor return oil system of the Chinese patent proposition of 201210331060.2 as application number, return suction side by the isolated oil of oil separator.No matter be resorption tracheae or gas-liquid separator, all can bring a certain amount of refrigerator oil into when compressor sucks gaseous coolant and cause the reduction of compressor volumetric efficiency.Air-conditioning system is run under identical operating mode, and compressor recirculating oil quantity is more, and ability decay is larger.Therefore, can there is a contradictory phenomena in this circuit: oil return is more, and compressor operating reliability is higher, but operational efficiency can reduce, and main manifestations is that volumetric efficiency reduces, and the decay of air-conditioning system ability increases.Namely compressor reliability and air-conditioning system efficiency are contradiction.So just need to find a good reliability and all acceptable equinoctial point of ability.In any case but this circuit all can cause the reduction of compressor efficiency and the decay of air-conditioning system ability.
Summary of the invention
The present invention proposes a kind of scroll compressor oil return control system, by oil return to the scroll compression chamber of compressor, the operational efficiency of compressor, reliability can be significantly improved, and the complete machine capability of air-conditioning system, efficiency, when air-conditioning system is run, compressor efficiency and ability improve.
Object of the present invention realizes by following technological scheme.
A kind of scroll compressor oil return control system, it includes scroll compressor and oil separator, described scroll compressor includes housing and is installed on the scroll compressor assembly in housing, scroll compressor assembly comprises frame, fixed scroll, motion vortex dish, bent axle and motor, fixed scroll and motion vortex dish are installed in the top of frame, fixed scroll and motion vortex dish are bonded scroll compression chamber, the middle part of frame is provided with axis hole, bent axle is through axis hole, the eccentric part on bent axle top inserts in the excentric sleeve of motion vortex dish, the rotor of the bottom mounted motor of bent axle, the stator of motor is fixedly mounted on the below of frame, fixed scroll has the fixed scroll suction port and fixed scroll relief opening that are communicated with scroll compression chamber, scroll compression chamber is communicated with space in housing by fixed scroll relief opening, housing is connected with compressor inleting pipe, compressor inleting pipe is through housing, its inner port is connected to fixed scroll suction port, housing below frame is provided with relief opening and is externally connected with compressor exhaust pipe.
Described oil separator is provided with oil separator suction port, oil separator relief opening and oil separator oil outlet, and compressor air-discharging pipe end pipe is connected to the oil separator suction port of oil separator, and oil separator relief opening is used for the refrigerant pipe of cascade refrigeration systems.
The fixed scroll of described scroll compressor is provided with the oil inlet hole be communicated with scroll compression chamber, oil inlet hole is positioned at the compressing section end in scroll compression chamber, and (leading portion in scroll compression chamber is inspiratory limb, stage casing is compressing section, back segment is exhaust section, fixed scroll relief opening is positioned at exhaust section), oil inlet hole connects oil inlet pipe outward, and oil inlet pipe is connected logical through housing, its external port by return tube with the oil separator oil outlet of oil separator.
Optimized project, the present invention includes oil return auxiliary device, and described oil return auxiliary device is contaminant filter and microcapillary tube serial connection, and the two ends of oil return auxiliary device are serially connected with on return tube.
Further optimized project, the present invention also comprises heat exchanger, and heat exchanger has low temperature path and high temperature channel, and the high temperature channel of heat exchanger is serially connected with on the return tube of nearly oil-feed pipe end.
Further optimized project, the present invention also includes solenoid valve, and solenoid valve is serially connected with on return tube.
During use, the present invention is serially connected with on the refrigerant pipe of refrigeration system by oil separator relief opening and suction tude, scroll compressor work when being vented, refrigerator oil enters oil separator with refrigerant, be vented rear scroll compressor and start air-breathing, to air-breathing later stage scroll compression chamber, oil inlet hole is open in suction side, makes the isolated refrigerator oil of oil separator enter the scroll compression chamber of scroll compressor through return tube and oil inlet pipe.
The present invention has following outstanding substantive distinguishing features and significant progress.
1, in the present invention, refrigerator oil is directly or be back to compressor scroll compression chamber by oil return auxiliary device, now the breathing process of compressor completes (scroll compression chamber and air aspiration cavity are separated), oil return neither occupies aspirated volume also can not heated getter side refrigerant and inspiratory volume is increased, and thus there is not oil return and enters the phenomenon that the suction coolant quantity that causes in compressor air suction chamber reduces.Thus, it is advantageous that: the raising of compressor volumetric efficiency and air-conditioning system ability, the overall efficiency of air-conditioning system improves.
2, between the refrigerator oil (being generally more than 55 DEG C) of high temperature and compressor scroll compression chamber, the temperature difference is less, thus obviously reduces the harmful overheated of compressor.Thus, it is advantageous that: compressor is more reliable and more stable.
Accompanying drawing explanation
Fig. 1 is the structural representation of scroll compressor of the present invention.
Fig. 2 is a kind of structural representation of the present invention.
Fig. 3 is another kind of structural representation of the present invention.
Fig. 4 is another structural representation of the present invention.
Fig. 5 is the B-B sectional view (air-breathing oil return state) of Fig. 1.
Embodiment
Further illustrate of the present invention below in conjunction with accompanying drawing.
Embodiment 1
With reference to figure 1 and Fig. 2, a kind of scroll compressor oil return control system, it includes scroll compressor 1 and oil separator 6.
The scroll compressor assembly that described scroll compressor 1 includes housing 12 and is installed in housing 12, scroll compressor assembly comprises frame 4, fixed scroll 2, motion vortex dish 3, bent axle 5 and motor, fixed scroll 2 and motion vortex dish 3 are installed in the top of frame 4, fixed scroll 2 and motion vortex dish 3 are bonded scroll compression chamber, the middle part of frame 4 is provided with axis hole, bent axle 5 is through axis hole, the eccentric part 51 on bent axle 5 top inserts in the excentric sleeve of motion vortex dish 3, the rotor 42 of the bottom mounted motor of bent axle 5, the stator 41 of motor is fixedly mounted on the below of frame 4, fixed scroll 2 has the fixed scroll suction port and fixed scroll relief opening 21 that are communicated with scroll compression chamber, fixed scroll relief opening 21 is positioned in the middle part of fixed scroll 2 and is communicated with housing 12 space 20 in scroll compression chamber, housing 12 is connected with compressor inleting pipe 11, compressor inleting pipe 11 is through housing 12, its inner port is connected to fixed scroll suction port, housing 12 below frame is provided with relief opening and is externally connected with compressor exhaust pipe 10.
Described oil separator 6 is provided with oil separator suction port 61, oil separator relief opening 62 and oil separator oil outlet 60, compressor exhaust pipe 10 end pipe is connected to the oil separator suction port 61 of oil separator 6, and oil separator relief opening 62 is for the refrigerant pipe of cascade refrigeration systems.
The fixed scroll 2 of described scroll compressor 1 is provided with the oil inlet hole 22 be communicated with scroll compression chamber, oil inlet hole 22 is positioned at the compressing section end (namely near fixed scroll relief opening 21) in scroll compression chamber, oil inlet hole 22 is outer connects oil inlet pipe 23, and oil inlet pipe 23 is connected logical through housing 12, its external port by return tube with the oil separator oil outlet 60 of oil separator 6.
During use, the present invention is serially connected with on the refrigerant pipe of refrigeration system by oil separator relief opening 62 and suction tude 11, when scroll compressor 1 works, the dynamic scrollwork of the oil inlet hole 22 passive movement scroll 3 of compression stage is closed, refrigerator oil is discharged from price fixing relief opening 21 with refrigerant, arrives exhaust outlet of compressor 10 and discharges compressor, enter oil separator 6, after gaseous coolant is separated with liquid refrigerator oil, liquid refrigerator oil is because gravitational settling is bottom oil separator; Scroll compressor 1 enters expiratory phase subsequently, the dynamic scrollwork of motion vortex dish 3 leaves oil inlet hole 22(as Fig. 5), at this moment because the pressure in scroll compression chamber is lower than the pressure (exhaust pressure) in oil separator, under differential pressure action, refrigerator oil enters the scroll compression chamber of scroll compressor 1 through return tube and oil inlet pipe 23, and scroll compression chamber enters compression stage again subsequently.So far, refrigerator oil completes " discharge-separation-oil return-compression chamber-again discharge " such process.Also can not heated getter chamber refrigerant and inspiratory volume is increased because oil return neither occupies aspirated volume, thus there is not oil return and enter the phenomenon that the suction coolant quantity that causes in compressor air suction chamber reduces.On the other hand, between the refrigerator oil (being generally more than 55 DEG C) of high temperature and compressor scroll compression chamber, the temperature difference is less, obviously can reduce the harmful overheated of compressor.
Embodiment 2
In conjunction with reference to figure 3, the difference of the present embodiment and embodiment 1 is: described scroll compressor oil return control system also includes oil return auxiliary device and solenoid valve 8, described oil return auxiliary device is connected in series by the pipe of contaminant filter 9 and capillary tube 7, the two ends of oil return auxiliary device are serially connected with on return tube, oil separator oil outlet 60 is connected to by contaminant filter 9 end, capillary tube 7 end is connected to oil inlet pipe 23 by return tube, and solenoid valve 8 is serially connected with between contaminant filter 9 and capillary tube 7 by the present embodiment.
When air-conditioning system is run, refrigerator oil contained in compressor 1 exhaust isolated by oil separator 6, through contaminant filter 9 impurity screening (contaminant filter 9 plays a part to prevent capillary tube 9 from blocking), capillary tube 7 throttling, finally return to the scroll compression chamber of compressor 1.By selecting suitable capillary tube 9, the recirculating oil quantity of system can obtain quantitative control substantially, and ensure reliability and the high-performance of compressor oil return, selecting of solenoid valve, can enable flexibly at any time or close oil separating device.The oil return control system of the present embodiment effectively can improve the overall performance of refrigeration system.
Embodiment 3
With reference to figure 4, the difference of the present embodiment and embodiment 2 is: described scroll compressor oil return control system also comprises heat exchanger 91, heat exchanger 91 has low temperature path and high temperature channel, on the return tube that the high temperature channel 93 of heat exchanger 91 is serially connected with nearly oil inlet pipe 23 end of oil return auxiliary device (also can not adopt oil return auxiliary device and be directly connected in oil separator oil outlet 60).Realize reducing returning-oil temperature by heat exchanger 91, reach the object of cooling compressor.Heat exchanger 91 can be plate type heat exchanger also can be finned heat exchanger or other form heat exchanger.
Cryogenic freezing machine oil is back to medium temperature and medium pressure (T in scroll compression chamber and cavity
m, P
m) refrigerant mixing, thus reduce mixed refrigerant temperature delivery temperature reduced, raising compressor reliability.Particularly run under some specific operation as ultralow temperature heats, the effect of cooling is more obvious.In addition, low temperature oil return makes the temperature in the scroll compression chamber of compressor 1 reduce, and both added oil viscosity, and again reduced the wearing and tearing of mechanical part, air-conditioning system reliability will improve greatly.
Claims (4)
1. a scroll compressor oil return control system, it includes scroll compressor (1) and oil separator (6);
The scroll compressor assembly that described scroll compressor (1) includes housing (12) and is installed in housing (12), scroll compressor assembly comprises frame (4), fixed scroll (2), motion vortex dish (3), bent axle (5) and motor, fixed scroll (2) and motion vortex dish (3) are installed in the top of frame (4), fixed scroll (2) and motion vortex dish (3) are bonded scroll compression chamber, the middle part of frame (4) is provided with axis hole, bent axle (5) is through axis hole, the eccentric part (51) on bent axle (5) top inserts in the excentric sleeve of motion vortex dish (3), the rotor (42) of the bottom mounted motor of bent axle (5), the stator (41) of motor is fixedly mounted on the below of frame (4), fixed scroll (2) has the fixed scroll suction port and fixed scroll relief opening (21) that are communicated with scroll compression chamber, scroll compression chamber is communicated with the interior space (20) of housing (12) by fixed scroll relief opening (21), housing (12) is connected with compressor inleting pipe (11), compressor inleting pipe (11) is through housing (12), its inner port is connected to fixed scroll suction port, housing (12) below frame is provided with relief opening and is externally connected with compressor exhaust pipe (10),
Described oil separator (6) is provided with oil separator suction port (61), oil separator relief opening (62) and oil separator oil outlet (60), compressor exhaust pipe (10) end pipe is connected to the oil separator suction port (61) of oil separator (6), and oil separator relief opening (62) is for the refrigerant pipe of cascade refrigeration systems;
It is characterized in that: the fixed scroll (2) of described scroll compressor (1) is provided with the oil inlet hole (22) be communicated with scroll compression chamber, oil inlet hole (22) is positioned at the compressing section end in scroll compression chamber, oil inlet hole (22) connects oil inlet pipe (23) outward, and oil inlet pipe (23) is connected logical through housing (12), its external port by return tube with the oil separator oil outlet (60) of oil separator (6).
2. scroll compressor oil return control system according to claim 1, it is characterized in that: also include oil return auxiliary device, described oil return auxiliary device is the pipe serial connection of contaminant filter (9) and capillary tube (7), and the two ends of oil return auxiliary device are serially connected with on return tube.
3. scroll compressor oil return control system according to claim 1, is characterized in that: also comprise heat exchanger (91), and heat exchanger (91) has low temperature path and high temperature channel, and the high temperature channel (93) of heat exchanger (91) is serially connected with on return tube.
4. the scroll compressor oil return control system according to claim 1 or 2 or 3, is characterized in that: also include solenoid valve (8), and solenoid valve (8) is serially connected with on return tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510755767.XA CN105351202A (en) | 2015-01-21 | 2015-11-10 | Oil return control system of scroll compressor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015200405807 | 2015-01-21 | ||
| CN201520040580 | 2015-01-21 | ||
| CN201510755767.XA CN105351202A (en) | 2015-01-21 | 2015-11-10 | Oil return control system of scroll compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105351202A true CN105351202A (en) | 2016-02-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520887283.6U Active CN205277825U (en) | 2015-01-21 | 2015-11-10 | Scroll compressor oil return control system |
| CN201510755767.XA Pending CN105351202A (en) | 2015-01-21 | 2015-11-10 | Oil return control system of scroll compressor |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520887283.6U Active CN205277825U (en) | 2015-01-21 | 2015-11-10 | Scroll compressor oil return control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665221A (en) * | 2020-12-07 | 2021-04-16 | 珠海格力电器股份有限公司 | Control system and control method for improving energy efficiency of compressor and air conditioner |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205277825U (en) * | 2015-01-21 | 2016-06-01 | 广州日立压缩机有限公司 | Scroll compressor oil return control system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106392A (en) * | 1986-10-23 | 1988-05-11 | Matsushita Electric Ind Co Ltd | Scroll type gas compressor |
| US4889471A (en) * | 1987-07-10 | 1989-12-26 | Hatachi, Ltd. | Mechanism for prevention of burning of bearing portions in a hermetic type scroll compressor |
| JPH06193577A (en) * | 1992-12-25 | 1994-07-12 | Hitachi Ltd | Lubrication type closed scroll compressor |
| CN1837618A (en) * | 2005-03-24 | 2006-09-27 | 株式会社日立空调系统 | Hermetic type scroll compressor and refrigerating and air-conditioning apparatus |
| CN205277825U (en) * | 2015-01-21 | 2016-06-01 | 广州日立压缩机有限公司 | Scroll compressor oil return control system |
-
2015
- 2015-11-10 CN CN201520887283.6U patent/CN205277825U/en active Active
- 2015-11-10 CN CN201510755767.XA patent/CN105351202A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63106392A (en) * | 1986-10-23 | 1988-05-11 | Matsushita Electric Ind Co Ltd | Scroll type gas compressor |
| US4889471A (en) * | 1987-07-10 | 1989-12-26 | Hatachi, Ltd. | Mechanism for prevention of burning of bearing portions in a hermetic type scroll compressor |
| JPH06193577A (en) * | 1992-12-25 | 1994-07-12 | Hitachi Ltd | Lubrication type closed scroll compressor |
| CN1837618A (en) * | 2005-03-24 | 2006-09-27 | 株式会社日立空调系统 | Hermetic type scroll compressor and refrigerating and air-conditioning apparatus |
| CN205277825U (en) * | 2015-01-21 | 2016-06-01 | 广州日立压缩机有限公司 | Scroll compressor oil return control system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665221A (en) * | 2020-12-07 | 2021-04-16 | 珠海格力电器股份有限公司 | Control system and control method for improving energy efficiency of compressor and air conditioner |
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| Publication number | Publication date |
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| CN205277825U (en) | 2016-06-01 |
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| CB02 | Change of applicant information |
Address after: 510935 Guangdong city of Guangzhou province Conghua City Ao Avenue Road 1086 Applicant after: Johnson of Hitachi Wanbao compressor (Guangzhou) Co. Ltd. Address before: 510470 Guangdong city of Guangzhou province Conghua City Ao Avenue Road No. 1086 Applicant before: Hiachi Compressor Products (Guangzhou) Co., Ltd. |
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Application publication date: 20160224 |