CN103867448A - Oil return structure for rolling rotor type compressor - Google Patents

Oil return structure for rolling rotor type compressor Download PDF

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Publication number
CN103867448A
CN103867448A CN201210536533.2A CN201210536533A CN103867448A CN 103867448 A CN103867448 A CN 103867448A CN 201210536533 A CN201210536533 A CN 201210536533A CN 103867448 A CN103867448 A CN 103867448A
Authority
CN
China
Prior art keywords
compressor
oil
iron core
housing
return line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201210536533.2A
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Chinese (zh)
Inventor
黄波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Hitachi Household Appliance Co Ltd
Original Assignee
Shanghai Hitachi Household Appliance Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Hitachi Household Appliance Co Ltd filed Critical Shanghai Hitachi Household Appliance Co Ltd
Priority to CN201210536533.2A priority Critical patent/CN103867448A/en
Publication of CN103867448A publication Critical patent/CN103867448A/en
Pending legal-status Critical Current

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Abstract

The present invention discloses an oil return structure for a rolling rotor type compressor. The oil return structure comprises a compressor housing, a motor iron core arranged inside the housing, a pump body end cover positioned on the lower portion of the motor iron core, a compressor bottom oil tank, and an oil return pipeline, wherein the oil return pipeline is positioned inside the housing, is closely attached to the housing wall, and penetrates through the motor iron core and the pump body end cover, the position of the upper end of the oil return pipeline is at the same level as the position of the upper plane of the motor iron core, and the lower end extends into the compressor bottom oil tank and is lower than the lowest liquid level surface of the oil tank. With the oil return structure, the accumulated oil on the upper portion of the compressor can be introduced into the bottom oil tank, such that the lubricating effect on the parts in the compressor and the normal operation of the compressor can be ensured, and the work efficiency of the compressor can be increased.

Description

For the oil-returning structure of rolling rotor type compressor
Technical field
The present invention relates to a kind of oil-returning structure for rolling rotor type compressor.
Background technique
Along with the development of frequency-changeable compressor, the structure of rolling rotor type compressor is tending towards miniaturization gradually, and the maximum (top) speed of compressor is more and more higher, in the situation that motor refrigerant flow area is limited, in the time of the high rotating speed operation of compressor, easily there is the long-pending oily situation in motor top, the characteristic during due to compressor operating, the long-pending oil in top is more difficult to be fallen after rise to compressor bottom oil sump, cause compressor inner piece lubrication effect variation, affected normal operation and the working efficiency of compressor; Simultaneously the pasta position of compressor bottom declines, and the reliability of compressor can not guarantee, the long-pending oily pasta in motor top, by the path blockade of exhaust, causes the loss of exhaust to increase.The long-pending oily problem in motor top can be solved by the refrigerant flow area that increases motor, increases the negative effect of decrease in efficiency but can produce motor iron loss.Therefore there is certain defect in traditional compressor structure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of oil-returning structure for rolling rotor type compressor, utilize this oil-returning structure can make the long-pending oil in compressor top import bottom oil sump, guarantee the normal operation of compressor inner piece lubrication effect and compressor, improve compressor operating efficiency.
For solving the problems of the technologies described above, the present invention for the oil-returning structure of rolling rotor type compressor comprise compressor housing, be located at the electric machine iron core in housing, the pump housing end cap that is positioned at electric machine iron core bottom and compressor bottom oil sump, it is characterized in that: also comprise return line, described return line is positioned at described housing and is close to shell body wall through described electric machine iron core and pump housing end cap, and described return line upper end flushes with plane on described electric machine iron core, described compressor bottom oil sump is stretched in lower end and the minimum liquid level face lower than oil sump.
Further, described in above-mentioned return line lower end edge, compressor bottom oil sump is obliquely installed.
Further, above-mentioned return line is copper pipe.
Further, above-mentioned return line is PBT composite material tube or PA6/PBT composite material tube.
Because the present invention has adopted technique scheme for the oil-returning structure of rolling rotor type compressor, be that this oil-returning structure comprises compressor housing, is located at the electric machine iron core in housing, the pump housing end cap that is positioned at electric machine iron core bottom and compressor bottom oil sump, also comprise return line, described return line is positioned at described housing and is close to shell body wall through described electric machine iron core and pump housing end cap, and described return line upper end flushes with plane on described electric machine iron core, described compressor bottom oil sump is stretched in lower end and the minimum liquid level face lower than oil sump.This oil-returning structure can make the long-pending oil in compressor top import bottom oil sump, guarantees the normal operation of compressor inner piece lubrication effect and compressor, improves compressor operating efficiency.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, the present invention is described in further detail:
Fig. 1 is the oil-returning structure schematic diagram of the present invention for rolling rotor type compressor.
Embodiment
As shown in Figure 1, the present invention for the oil-returning structure of rolling rotor type compressor comprise compressor housing 1, be located at the electric machine iron core 2 in housing 1, the pump housing end cap 3 that is positioned at electric machine iron core 2 bottoms and compressor bottom oil sump 4, it is characterized in that: also comprise return line 5, described return line 5 is positioned at described housing 1 and is close to housing 1 wall through described electric machine iron core 2 and pump housing end cap 3, and described return line 5 upper ends flush with plane on described electric machine iron core 2, described compressor bottom oil sump 4 is stretched in lower end and the minimum liquid level face lower than oil sump 4.
Further, described in above-mentioned return line 5 lower end edges, compressor bottom oil sump 4 is obliquely installed.Return line bottom is obliquely installed and can makes oil return along the oil sump smooth and easy falling in bottom.
Further, above-mentioned return line 5 can adopt copper pipe.But copper pipe application has improved this oil-returning structure cost.
Further, above-mentioned return line 5 can adopt PBT composite material tube or PA6/PBT composite material tube.The application of composite material tube has overcome the expensive defect of copper pipe, and the characteristic such as tool is high temperature resistant, high pressure resistant, not yielding, there is good compatibility with refrigerant in compressor and oil gas, this composite material tube can bear the high temperature conduction that welding causes in compressor assembly process, in compressor operation process, can bear high pressure in cavity and refrigerant, oil gas contact, thereby guarantee that the long-pending oil in compressor top falls after rise.
In the time carrying out the structure investigation of compressor, utilize this oil-returning structure at the corresponding return line of the inner installation of compressor.From compressor inner structure, inner is metal material substantially, and thermal conductivity is high; From compressor assembly process, the high temperature of pipeline welding process, the pipeline that easily makes to be attached on compressor inside melts, is out of shape; State during from compressor operation, the state that the high pressure in compressor chamber, high temperature, refrigerant mix with oil-gas-liquid, the everyway such as material to institute's installation pipeline, heat resistanceheat resistant type, resistance to pressure, compatibility has higher requirements.Thereby the preferred PBT composite material tube of the return line of this oil-returning structure or PA6/PBT composite material tube, this composite material tube meets the requirement of compressor to return line material, assembling and operating conditions; By return line is set in compressor housing, this return line is through electric machine iron core and pump housing end cap and be close to inner walls; When as installed, this return line can insert electric machine iron core and pump housing end cap outer ring groove along inner walls, make the long-pending oil in compressor top fall fast bottom oil sump after rise by return line, improve the long-pending oily falling in compressor top, overcome the not smooth defect of compressor top oil return, guarantee the lubrication effect of the each parts of compressor, improved the working efficiency of compressor.

Claims (4)

1. the oil-returning structure for rolling rotor type compressor, comprise compressor housing, be located at the electric machine iron core in housing, the pump housing end cap that is positioned at electric machine iron core bottom and compressor bottom oil sump, it is characterized in that: also comprise return line, described return line is positioned at described housing and is close to shell body wall through described electric machine iron core and pump housing end cap, and described return line upper end flushes with plane on described electric machine iron core, described compressor bottom oil sump is stretched in lower end and the minimum liquid level face lower than oil sump.
2. the oil-returning structure for rolling rotor type compressor according to claim 1, is characterized in that: described in described return line lower end edge, compressor bottom oil sump is obliquely installed.
3. the oil-returning structure for rolling rotor type compressor according to claim 1 and 2, is characterized in that: described return line is copper pipe.
4. the oil-returning structure for rolling rotor type compressor according to claim 1 and 2, is characterized in that: described return line is PBT composite material tube or PA6/PBT composite material tube.
CN201210536533.2A 2012-12-13 2012-12-13 Oil return structure for rolling rotor type compressor Pending CN103867448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210536533.2A CN103867448A (en) 2012-12-13 2012-12-13 Oil return structure for rolling rotor type compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210536533.2A CN103867448A (en) 2012-12-13 2012-12-13 Oil return structure for rolling rotor type compressor

Publications (1)

Publication Number Publication Date
CN103867448A true CN103867448A (en) 2014-06-18

Family

ID=50906345

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210536533.2A Pending CN103867448A (en) 2012-12-13 2012-12-13 Oil return structure for rolling rotor type compressor

Country Status (1)

Country Link
CN (1) CN103867448A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61155688A (en) * 1984-12-28 1986-07-15 Toshiba Corp Rotary compressor
JPS61171890A (en) * 1985-01-28 1986-08-02 Sanyo Electric Co Ltd Oil return device of enclosure type compressor
JPH0828465A (en) * 1994-07-14 1996-01-30 Daikin Ind Ltd Scroll compressor
JPH08151990A (en) * 1994-11-30 1996-06-11 Daikin Ind Ltd Scroll fluid device
CN201288666Y (en) * 2008-09-19 2009-08-12 广州日立压缩机有限公司 Structure for axial push stopping apparatus of cyclone compressor
CN202001309U (en) * 2010-12-30 2011-10-05 上海日立电器有限公司 Compressor with oil return pipe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61155688A (en) * 1984-12-28 1986-07-15 Toshiba Corp Rotary compressor
JPS61171890A (en) * 1985-01-28 1986-08-02 Sanyo Electric Co Ltd Oil return device of enclosure type compressor
JPH0828465A (en) * 1994-07-14 1996-01-30 Daikin Ind Ltd Scroll compressor
JPH08151990A (en) * 1994-11-30 1996-06-11 Daikin Ind Ltd Scroll fluid device
CN201288666Y (en) * 2008-09-19 2009-08-12 广州日立压缩机有限公司 Structure for axial push stopping apparatus of cyclone compressor
CN202001309U (en) * 2010-12-30 2011-10-05 上海日立电器有限公司 Compressor with oil return pipe

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Application publication date: 20140618