CN102563976A - Oil return system of compressor - Google Patents
Oil return system of compressor Download PDFInfo
- Publication number
- CN102563976A CN102563976A CN2012100227251A CN201210022725A CN102563976A CN 102563976 A CN102563976 A CN 102563976A CN 2012100227251 A CN2012100227251 A CN 2012100227251A CN 201210022725 A CN201210022725 A CN 201210022725A CN 102563976 A CN102563976 A CN 102563976A
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- compressor
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- pressure liquid
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- 239000007788 liquid Substances 0.000 claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims abstract description 19
- 239000012530 fluid Substances 0.000 claims description 7
- 238000009826 distribution Methods 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 58
- 239000010687 lubricating oil Substances 0.000 description 6
- 239000010725 compressor oil Substances 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000037351 starvation Effects 0.000 description 1
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Abstract
An oil return system of a compressor comprises the compressor, an oil separator, a four-way valve and a low-pressure liquid storage tank, wherein an exhaust pipe of the compressor is connected with the oil separator, a refrigerant outlet end of the oil separator is connected with a D end of the four-way valve, an oil outlet end of the oil separator is connected with an inlet pipe of the low-pressure liquid storage tank through a capillary tube, and an outlet pipe of the low-pressure liquid storage tank is connected with an air suction pipe of the compressor. An inlet pipe of the low-pressure liquid storage tank is connected with the S end of the four-way valve. A one-way valve is arranged between the refrigerant outlet end of the oil separator and the D end of the four-way valve. The number of the compressors is one or more than two, the exhaust pipe of each compressor is respectively connected with an oil separator, the refrigerant outlet ends of all the oil separators are respectively connected with a one-way valve, and the converged refrigerant is connected with the D end of the four-way valve. According to the invention, each compressor is provided with the oil separator to return oil to the inlet pipe of the low-pressure liquid storage tank, and then the oil is uniformly distributed back to each compressor by the low-pressure liquid storage tank, so that the oil distribution is more uniform, the problem that the number of the compressors is more or less than that of the return oil is solved, and the defects of the traditional oil return system are overcome.
Description
Technical field
The present invention relates to a kind of air conditioner, specifically is the oil return system of the compressor of air conditioner.
Background technology
The oil that the oil eliminator that present traditional oil return method is each compressor is separated is on the compressor return air pipe of getting back to separately; And there is defective in such oil return, if exist a compressor lubricant oil many, a compressor lubricant oil is few; The unnecessary lubricating oil of the compressor that lubricating oil is many so just can not be assigned in the few compressor of lubricating oil; Oil return is inhomogeneous like this, will make the many press of lubricating oil influence heat transfer efficiency because lubricating oil, reduces system's refrigerating capacity; And another compressor can I haven't seen you for ages influences compressor lubrication because lubricating oil crossed, and makes overheat of compressor and reduces its service life.
The oil return separator that Chinese patent document number CN101349257 discloses a kind of cooler compressor on January 21st, 2009, air-conditioner outdoor unit comprises frequency-changeable compressor, constant speed compressor, fluid reservoir, cross valve and oil eliminator; Fluid reservoir is arranged between frequency-changeable compressor, the constant speed compressor; Refrigerant flows to indoor set and off-premises station respectively through cross valve; The outlet of frequency-changeable compressor, constant speed compressor passes through oil eliminator respectively; The oil return pipe of oil eliminator is arranged in a crossed manner on the input port of other compressor, and the machine oil that oil eliminator is separated with refrigerant is directed to the suction end of compressor.The shortcoming of this structure is: when indoor refrigeration requirement not for a long time, only drive a compressor, oil just can not get back to well in the compressor, can cause the compressor oil starvation, burn out compressor.
Chinese patent document number CN102200360A discloses a kind of compressor oil equalization system on September 28th, 2011, comprises and compressor, oil eliminator, gas-liquid separator, fluid reservoir, ad hoc compressor, reversal valve I, reversal valve II and the mechanism of decompressor of downlink connection; Ad hoc compressor air suction end is leaded up to the mechanism of decompressor and is connected on the suction manifold; Another road is connected with second interface of reversal valve I, and ad hoc compressor air-discharging end one tunnel is connected with exhaust header, and another road is connected with the 3rd interface of reversal valve I; Ad hoc compressor is connected with oil eliminator fuel feeding collector; Ad hoc compressor is provided with oil level controllers, and oil storage tank is provided with three interfaces, and level sensor is set on the oil storage tank.The shortcoming of this structure is: system complex, and the refrigeration accessory is many, and cost is high, and the mechanism of decompressor will be set, and the complicacy of system is prone to cause mechanical disorder, influences the client and uses.
Summary of the invention
The object of the invention aims to provide the oil return system of the compressor of a kind of simplicity of design, rational in infrastructure, compressor oil return distributed uniform, to overcome weak point of the prior art.
Press the oil return system of a kind of compressor of this purpose design; Comprise compressor, oil eliminator, cross valve and low-pressure liquid storing tank; The blast pipe of compressor is connected with oil eliminator; The refrigerant exit end of oil eliminator is connected with the D of cross valve end, and its architectural feature is that the oil export end of oil eliminator is connected with the inlet tube of low-pressure liquid storing tank through capillary, and the outlet of low-pressure liquid storing tank is connected with the air intake duct of compressor.
The inlet tube of said low-pressure liquid storing tank and the S of cross valve end is connected, junction chamber external heat exchanger, electric expansion valve, high pressure fluid reservoir, high-pressure stop valve, indoor heat exchanger and low-pressure shutoff valve successively between the C end of cross valve and E hold.
Be provided with check valve between the refrigerant exit end of said oil eliminator and the D of the cross valve end.
Said compressor is one, or more than two, the blast pipe of said every compressor connects an oil eliminator separately, and the refrigerant exit end of all oil eliminators connects check valve respectively, and the back of confluxing is connected with the D end of cross valve.
Said compressor is frequency-changeable compressor or invariable frequency compressor or both combinations.
The inlet tube of low-pressure liquid storing tank got back to oil by each compressor built-in oil separator of the present invention; Got back in each compressor by the low-pressure liquid storing tank unified distribution, it is more even that oil content is joined again, and do not have the many or few problem of oil return of the relative oil return of compressor; Solved the defective that traditional oil return system exists; Guaranteed the compressor normal operation, its stability and ability are better brought into play, and have also reduced the generation of air-conditioning fault.
Description of drawings
Fig. 1 is the schematic diagram of one embodiment of the invention oil return system.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 1; The oil return system of this compressor; Comprise compressor 1, oil eliminator 2, cross valve 4 and low-pressure liquid storing tank 8, the blast pipe of compressor 1 is connected with oil eliminator 2, and the refrigerant exit end of oil eliminator 2 is connected with the D of cross valve 4 end; The oil export end that it is characterized in that oil eliminator 2 is connected with the inlet tube of low-pressure liquid storing tank 8 through capillary, and the outlet of low-pressure liquid storing tank 8 is connected with the air intake duct of compressor 1.
The S end of the inlet tube of low-pressure liquid storing tank 8 and cross valve 4 is connected, junction chamber external heat exchanger 5, electric expansion valve 6, high pressure fluid reservoir 7, high-pressure stop valve 10, indoor heat exchanger 9 and low-pressure shutoff valve 11 successively between the C end of cross valve 4 and E hold.Be provided with check valve 3 between the refrigerant exit end of oil eliminator 2 and the D of cross valve 4 end, prevent coolant backflow.
Compressor 1 is one, or more than two, the compressor in the present embodiment is two, and the blast pipe of every compressor 1 connects an oil eliminator 2 separately, and the refrigerant exit end of all oil eliminators 2 connects check valve 2 respectively, and the back of confluxing is connected with the D end of cross valve 4.
The refrigerant of two compressors 1 compression flows into the oil eliminator 2 that connects separately, and oil eliminator 2 confluxes to cross valve 4 behind the refrigerant process check valve 3 after refrigerant and oily the separation; And entering condenser 5; Refrigerant gets into high pressure fluid reservoir 7 after the condensation after electric expansion valve 6 throttlings, gets into indoor set 9 then; Enter into low-pressure liquid storing tank 8 through cross valve 4 again after the heat exchange, and then get back in the compressor 1.Oil eliminator 2 isolated oil enter into the inlet tube of low-pressure liquid storing tank 8 through the oil return capillary, if multiple compressors 1 parallel connection, enter into the inlet tube of low-pressure liquid storing tank 8 after oil confluxes through the oil return capillary again.Wherein low-pressure liquid storing tank 8 requires to have spill port.Each compressor 1 built-in oil separator 2 of this oil return system is got back to the inlet tube of low-pressure liquid storing tank 8 to oil, gets back to 1 li on each compressor by low-pressure liquid storing tank 8 unified distributions again, and it is more even that oil content is joined.
Wherein, compressor 1 can be combination of frequency-changeable compressor or invariable frequency compressor or frequency-changeable compressor and Duo Tai invariable frequency compressor etc.
Claims (5)
1. the oil return system of a compressor; Comprise compressor (1), oil eliminator (2), cross valve (4) and low-pressure liquid storing tank (8); The blast pipe of compressor (1) is connected with oil eliminator (2); The refrigerant exit end of oil eliminator (2) is connected with the D end of cross valve (4), it is characterized in that the oil export end of oil eliminator (2) is connected with the inlet tube of low-pressure liquid storing tank (8) through capillary, and the outlet of low-pressure liquid storing tank (8) is connected with the air intake duct of compressor (1).
2. according to the oil return system of the said compressor of claim 1; The inlet tube that it is characterized in that said low-pressure liquid storing tank (8) is connected with the S of cross valve (4) end, junction chamber external heat exchanger (5), electric expansion valve (6), high pressure fluid reservoir (7), high-pressure stop valve (10), indoor heat exchanger (9) and low-pressure shutoff valve (11) successively between the C end of cross valve (4) and E hold.
3. according to the oil return system of the said compressor of claim 2, it is characterized in that being provided with check valve (3) between the D end of refrigerant exit end and cross valve (4) of said oil eliminator (2).
4. according to the oil return system of each said compressor of claim 1-3; It is characterized in that said compressor (1) is one; Or more than two; The blast pipe of said every compressor (1) connects an oil eliminator (2) separately, and the refrigerant exit end of all oil eliminators (2) connects check valve (2) respectively, and the back of confluxing is connected with the D end of cross valve (4).
5. according to the oil return system of the said compressor of claim 4, it is characterized in that said compressor (1) is frequency-changeable compressor or invariable frequency compressor or both combinations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100227251A CN102563976A (en) | 2012-02-01 | 2012-02-01 | Oil return system of compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100227251A CN102563976A (en) | 2012-02-01 | 2012-02-01 | Oil return system of compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102563976A true CN102563976A (en) | 2012-07-11 |
Family
ID=46410084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100227251A Pending CN102563976A (en) | 2012-02-01 | 2012-02-01 | Oil return system of compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102563976A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913014A (en) * | 2012-12-31 | 2014-07-09 | 珠海格力电器股份有限公司 | Oil return device and air conditioning unit with oil return device |
| CN103968608A (en) * | 2013-01-30 | 2014-08-06 | 同方人工环境有限公司 | Air source heat pump unit with parallel double compressors |
| CN106403418A (en) * | 2016-11-07 | 2017-02-15 | 广州天河兰石技术开发有限公司 | Oil content control device for refrigeration element testing |
| CN107990597A (en) * | 2017-10-25 | 2018-05-04 | 珠海格力电器股份有限公司 | Refrigeration system method for controlling oil return and device |
| CN108224849A (en) * | 2017-12-28 | 2018-06-29 | 青岛海尔空调电子有限公司 | Air conditioner oil returning control method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US557390A (en) * | 1896-03-31 | Baking-oven | ||
| US1995055A (en) * | 1932-08-31 | 1935-03-19 | Puddicombe Jack De | Method and means for protecting neon signs and circuits |
| CN1464251A (en) * | 2002-06-07 | 2003-12-31 | 乐金电子(天津)电器有限公司 | Air-conditioner |
| CN2636160Y (en) * | 2003-04-30 | 2004-08-25 | 熊晓强 | Air conditioner with double compressors |
| CN201318754Y (en) * | 2008-12-11 | 2009-09-30 | 广东美的电器股份有限公司 | Large ducted machine unit |
| CN101871707A (en) * | 2010-06-29 | 2010-10-27 | 广东志高空调有限公司 | Oil return system of low-pressure cavity compressor air conditioner |
| CN202092375U (en) * | 2011-04-28 | 2011-12-28 | 青岛海信日立空调系统有限公司 | Air-conditioner unit oil equalization control system |
-
2012
- 2012-02-01 CN CN2012100227251A patent/CN102563976A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US557390A (en) * | 1896-03-31 | Baking-oven | ||
| US1995055A (en) * | 1932-08-31 | 1935-03-19 | Puddicombe Jack De | Method and means for protecting neon signs and circuits |
| CN1464251A (en) * | 2002-06-07 | 2003-12-31 | 乐金电子(天津)电器有限公司 | Air-conditioner |
| CN2636160Y (en) * | 2003-04-30 | 2004-08-25 | 熊晓强 | Air conditioner with double compressors |
| CN201318754Y (en) * | 2008-12-11 | 2009-09-30 | 广东美的电器股份有限公司 | Large ducted machine unit |
| CN101871707A (en) * | 2010-06-29 | 2010-10-27 | 广东志高空调有限公司 | Oil return system of low-pressure cavity compressor air conditioner |
| CN202092375U (en) * | 2011-04-28 | 2011-12-28 | 青岛海信日立空调系统有限公司 | Air-conditioner unit oil equalization control system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103913014A (en) * | 2012-12-31 | 2014-07-09 | 珠海格力电器股份有限公司 | Oil return device and air conditioning unit with oil return device |
| CN103913014B (en) * | 2012-12-31 | 2016-05-25 | 珠海格力电器股份有限公司 | Oil return apparatus and there is the air-conditioning unit of this oil return apparatus |
| CN103968608A (en) * | 2013-01-30 | 2014-08-06 | 同方人工环境有限公司 | Air source heat pump unit with parallel double compressors |
| CN106403418A (en) * | 2016-11-07 | 2017-02-15 | 广州天河兰石技术开发有限公司 | Oil content control device for refrigeration element testing |
| CN106403418B (en) * | 2016-11-07 | 2022-03-08 | 广州天河兰石技术开发有限公司 | Oil content control device for testing refrigeration components |
| CN107990597A (en) * | 2017-10-25 | 2018-05-04 | 珠海格力电器股份有限公司 | Refrigeration system method for controlling oil return and device |
| CN108224849A (en) * | 2017-12-28 | 2018-06-29 | 青岛海尔空调电子有限公司 | Air conditioner oil returning control method |
| CN108224849B (en) * | 2017-12-28 | 2020-08-07 | 青岛海尔空调电子有限公司 | Oil return control method for air conditioner |
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| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 528311, Guangdong, Foshan Town, Shunde District, Beijiao, 6 beautiful avenue, beautiful headquarters building, B District, 26 - 28 floor Applicant after: MIDEA GROUP Co.,Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Applicant before: Midea Group |
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Free format text: CORRECT: APPLICANT; FROM: MEIDI GROUP CO. LTD. TO: MIDEA GROUP CO., LTD. |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120711 |