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LINEAR COMPRESSOR MAGNETIC CUP DESIGN

IP.com Disclosure Number: IPCOM000236635D
Publication Date: 2014-May-07
Document File: 5 page(s) / 68K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present invention relates to a linear compressor used in appliances, such as, refrigerators. The invention proposes an improved magnetic cup design with certain features introduced into the design. The added features include gas vent holes and oil vent holes. Gas vent holes are configured at the bottom of the cup to relive gas pressure between cup and cylinder. Oil Drain holes are configured on the circumference of circular cup and located towards bottom face of cup.

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LINEAR COMPRESSOR MAGNETIC CUP DESIGN

BRIEF ABSTRACT

The present invention relates to a linear compressor used in appliances, such as, refrigerators. The invention proposes an improved magnetic cup design with certain features introduced into the design. The added features include gas vent holes and oil vent holes. Gas vent holes are configured at the bottom of the cup to relive gas pressure between cup and cylinder. Oil Drain holes are configured on the circumference of circular cup and located towards bottom face of cup.

KEYWORDS

Magnetic cup, gas vent hole, oil vent holes, linear compressor

DETAILED DESCRIPTION

Magnet cup holder of a linear compressor has two purposes. One of the purposes is to hold magnet circumferentially between inner and outer back-iron while the other purpose is to transmit motion of magnets to a piston for compression. Due to the way magnet cup is positioned around cylinder and piston, there is gas volume trapped between the cup and the cylinder. While reciprocating and transmitting motion from the magnets to the piston, the cup compresses gas between the cup and the cylinder. This adds additional burden (force requirement) on the magnets resulting in increased current input and consequently more power consumption.

Also, lubricating oil from the radial clearance volume between the piston and cylinder flows into the cup. This collects at the bottom of the cup and then starts to flow between the cup and inner/outer back iron. Due to high viscosity of the oil and smaller gaps between the cup & inner/outer back iron, viscous shear friction is higher which results in requirement of higher current and consequently higher power consumption. Due to these two aspects, magnet cup holder design is very critical.

Therefore, there is a need to improve magnetic cup design which allows less power consumption.

The present invention relates to a linear compressor used in appliances, such as, refrigerators. The invention proposes an improved magneti...