Pumps – Motor driven – Electric or magnetic motor
Patent
1997-02-21
1999-11-30
Denion, Thomas E.
Pumps
Motor driven
Electric or magnetic motor
417571, 184 68, 184 617, F04B 1704
Patent
active
059931752
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an oil supply apparatus for a friction portion of a linear compressor, and particularly to an improved oil supply apparatus for a friction portion of a linear compressor which is capable of enhancing a lubricating efficiency between a cylinder and a piston by substantially providing oil to a friction portion therebetween and enabling a more smooth piston reciprocating movement within the cylinder, so that the interior of the cylinder heated by a refrigerant gas having a high temperature and pressure is efficiently cooled, and a manufacturing cost is reduced, and the productivity can be improved thereby.
BACKGROUND ART
Generally, a refrigerator works for 24 hours per day. The refrigerator accounts for one-third the total consumption of the electrical energy of the home appliance. The compressor uses about 80-90% of the power consumption of the refrigerator.
Therefore, much study with respect to the compressor has been conducted so as to enhance the efficiency thereof and reduce the power consumption.
However, so far since the compressor is fabricated in a method of using the crank shaft for converting the rotation movement of the motor into a linear reciprocating movement of the piston, the parts related to the crank shaft such as a connecting rod, a bearing, and the like are additionally necessary, so the number of elements are increased, and thus the fabricating cost is increased, thus degrading the productivity.
In addition, when the compressor is in operation, many friction occur between elements, so the efficiency of the compressor is degraded, and power consumption is increased.
Therefore, so as to resolve the above-mentioned problems, a linear compressor was introduced in the industry, which is directed to reciprocating the piston using a magnet and a coil without using the crank shaft.
Namely, the linear compressor is directed to reducing the fabricating cost and improving the productivity. In more detail, it is possible to increase the efficiency by more than 90% by reducing the friction portions between elements by reducing the number of elements, thus reducing the power consumption.
The linear compressor is directed to basically improving the efficiency by smoothly enabling the reciprocating movement of the piston.
In the industry, various types of the oil supply apparatus for a friction portion of the compressor was introduced, which was directed to smoothly enabling the reciprocating movement of the piston by supplying oil to the friction portion between the cylinder and the piston. Of which, for example, one conventional linear compressor equipped with the oil supply apparatus for a friction portion will now be described.
FIG. 1 shows the conventional linear compressor equipped with the oil supply apparatus for a friction portion. As shown therein, a cylinder 2 is disposed within a predetermined shaped hermetic housing 1.
Coil assemblies 3 and 3a are integrally engaged to the cylinder 2.
A piston spring 4 is provided at one side of the cylinder 2, and a piston 5 is connected to the intermediate portion of the piston spring 4 in order for the same to reciprocate within the cylinder 2.
A magnet 6 is disposed at the outer circumferential surface of the piston 5, and a plurality of mounting springs 7 for elastically supporting the piston spring 4 are elastically connected between the piston spring 4 and the hermetic housing 1.
Meanwhile, a valve assembly 8 is disposed at one side of the cylinder 2, and a suction-side muffler 9 and a discharging-side muffler 9a are mounted at both sides of the valve assembly 8.
An oil suction tube 10 is downwardly connected to a predetermined portion of the suction-side muffler 9 so as to suck the oil "O" filled in the bottom portion of the hermetic housing 1.
As shown in FIG. 2, the valve assembly 8 includes a suction gasket 11, a discharging gasket 15, a suction valve 12, a discharging valve 14, and a valve sheet 13. Here, the above-mentioned elements are tightly engaged to one another, and will be described in
REFERENCES:
patent: 3325085 (1967-06-01), Gaus
patent: 3538357 (1970-11-01), Barthalon
patent: 3814550 (1974-06-01), Adams
patent: 4032264 (1977-06-01), Takahashi
patent: 5110272 (1992-05-01), Peruzzi et al.
patent: 5577901 (1996-11-01), Yoon
Kim Hyung Jin
Lee Hyung Kook
Denion Thomas E.
LG Electronics Inc.
Nguyen Apollo
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