Abstract: Disclosed is a rotary compressor having two compression capacities in clockwise and counterclockwise directions.

Abstract: Refrigerating system for a refrigerator including a variable capacity compressor having a varied rate of compressed refrigerant delivery for compressing refrigerant, a condenser for condensing the refrigerant compressed by the variable capacity compressor, a freezing chamber expansion valve for expanding condensed refrigerant, a freezing chamber evaporator for cooling air by using the refrigerant supplied from the freezing chamber expansion valve, two or more than two refrigerating chamber expansion valves having different lengths of refrigerant flow passages, for expanding the condensed refrigerant, two or more than two refrigerating chamber evaporators having different lengths of refrigerant flow passages, for cooing air by using the refrigerant from the refrigerating chamber expansion valves, respectively, and a distributor between the condenser and the expansion valves for selective supply of the refrigerant to the expansion valves according to an operation time period of the refrigerating system, thereby

Abstract: A heat exchanger for a refrigerator is disclosed, which has a simple structure, an improved heat exchanging efficiency, and an operating reliability. In the heat exchanger including a refrigerant tube (10) having a plurality of straight parts (11) and a plurality of curved parts (12) which connect the straight parts; and a plurality of fins (20) coupled to the straight parts (11) respectively through a plurality of inner through holes (21), the refrigrant tube (10) has a joining portion of the curved parts (12) and the straight parts (11) coated with a metal layer (110).

Abstract: Fuel cell including an electrolyte, an anode and a cathode on both sides of the electrolyte, a cathode side separator at an outer side of the cathode having a flow passage for flow of air, and a flow passage between the electrolyte and the anode, thereby improving an electricity generating performance.

Abstract: According to the present invention, there is provided a plasma polymerization surface modification of a metal for enhancing its applicability for use in refrigerating and air conditioning such as in constructing heat exchanges, by using a DC discharge plasma, comprising the steps of: (a) positioning an anode electrode which is substantially of metal to be surface-modified and a cathode electrode in a chamber, (b) maintaining a pressure in the chamber at a predetermined vacuum level, (c) blowing a reaction gas composed of an unsaturated aliphatic hydrocarbon monomer gas or fluorine-containing monomer and silicon containing monomer gas at a predetermined pressure and a non-polymerizable gas at a predetermined pressure into the chamber, and (d) applying a voltage to the electrodes in order to obtain a DC discharge, whereby to obtain a plasma consisting of positive and negative ions and radicals generated from the unsaturated aliphatic hydrocarbon monomer gas and the non-polymerizable gas, and then forming a poly