Pumps – Expansible chamber type – Valved piston
Patent
1997-04-09
1999-09-07
Freay, Charles G.
Pumps
Expansible chamber type
Valved piston
417570, 137856, F04B 3910, F16K 1516
Patent
active
059477083
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to an axial flow valve system for a linear compressor, and in particular, to an improved axial flow valve system for a linear compressor which is capable of enhancing the operation of the compressor by securely fixing an intake valve comprising the axial flow valve system to prevent an undesired axial movement of the intake valve, promptly carrying out the opening-closing operation and improving the reliability of a valve opening-closing operation.
BACKGROUND ART
Recently, in order to overcome the deficiencies of a compressor employing a rotating crank shaft, there has been developed a linear type compressor for reciprocally moving a piston using a magnet and a coil instead of a crankshaft, whereby the number of components and the manufacturing cost can be reduced, resulting in an improvement in productivity. Simultaneously, the motor efficiency has been enhanced up to more than 90%, and the electrical consumption has been diminished.
In a typical linear compressor according to the conventional art, as shown in FIG. 1, a cylinder 2 is provided having a predetermined space from an inner bottom surface of an enclosed container 1.
Inside the cylinder, coil assemblies 3,3' are formed to be integral with the cylinder 2.
At a portion of the cylinder 2, a piston spring 4 is fixed, and a piston 5 is connected to an inner central portion of the piston spring 4, which connection enables the piston 5 to make a linear reciprocable movement within the cylinder 2.
A magnet 6 is affixed to an outer circumferential surface of the piston 5, and a plurality of mountain springs 7 are connected between the piston spring 4 and the enclosed container 1 to resiliently support the piston spring 4.
A valve assembly 8 is affixed on a central portion of one end of the cylinder 2, and an intake muffler 9 and an exhaust muffler 10 are affixed to respective sides of the valve assembly 8.
In the above-described linear compressor according to the conventional art, the coil assembly 3,3' affixed to the cylinder 2 and the magnet 6 affixed to the piston 5 carry out a function of a linear motor.
That is, by electromagnetic energy and a resilient force, the piston 5 repeatedly carries out a linear reciprocating movement inside the cylinder 2, and thereby draws a refrigerant through an intake valve comprising the valve assembly 8, and compresses the refrigerant in a compression chamber (C), and then discharges the compressed refrigerant through an exhaust valve.
Here, the intake muffler 9 and the exhaust muffler 10 respectively provided at an intake side and an exhaust side reduce noise in the refrigerant.
In the above-described conventional linear compressor, the opening-closing portions of the valves controlling the flow of the refrigerant are a basic factor in improving the efficiency of the compressor. Therefore, in order to enhance the efficiency of the compressor, there is known an axial flow valve system which has the same flow direction of the refrigerant as the movement direction of the piston.
In an inertia-mode(for opening and closing the intake valve using inertia) valve system employed in the conventional linear compressor, as shown in FIG. 2, a cylindrical groove 2a is provided in a portion of an inner circumferential surface of the cylinder 2A.
In addition, at a central front portion of the piston 5A, an intake valve 11 is affixed with a caulking by a piston pin 12. Here, the intake valve 11 is disposed to be moved to the left and right, and therefore can control the flow of the refrigerant in accordance with the movement direction of the piston 5A.
A head cover 13 is connected to one end of the cylinder 2A, and an exhaust valve 14 and a spring 15 are disposed inside the head cover 13. Therefore, when the pressure of the refrigerant gas compressed in the compression chamber (C) of the cylinder 2A exceeds the resilient force of the spring 15, the refrigerant pushes open the exhaust valve 14, and then is exhausted through the head cover 13.
Reference numeral 5b denotes a threaded h
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International Search Report-From PCT Application No. PCT/KR96/00140-Date of Internation Search Nov. 13, 1996.
Lee Hyung Kook
Park Jung Sik
Freay Charles G.
LG Electronics Inc.
Ratcliffe Paul
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