Abstract: A discharge valve of a hermetic compressor includes a valve plate disposed on a cylinder head that sucks and discharges refrigerant according to reciprocal movement of a piston, and the discharge valve having a discharge hole formed therein through which refrigerant is discharged, a disc valve disposed adjacent the discharge hole of the valve plate, the disc valve being raised or lowered by the reciprocal movement of the piston, and a stopper disposed above the disc valve, for guiding the raising and lowering of the disc valve and also for limiting the height to which the disc valve may be raised. The compressor is not subject to overload or over pressurization that may otherwise result from the elastic force of the valve, and as a result, compression efficiency is increased, while noise is decreased.

Abstract: A compressor is capable of reducing vibration and noise produced during a discharge of compressed refrigerant through a discharge line tube. The discharge line tube of the compressor has a bent portion to reduce vibration and noise when the compressed refrigerant is discharged into a discharge pipe. The compressor includes an elastic member having hooks formed on both ends thereof, for generating a predetermined tension while being supported on the bent portion of the discharge line tube on two locations. Since vibration and noise can be reduced significantly, appliances that require the compressor as an essential element can provide optimum environment to users.

Abstract: A compressor is capable of reducing vibration and noise produced during a discharge of compressed refrigerant through a discharge line tube. The discharge line tube of the compressor has a bent portion to reduce vibration and noise when the compressed refrigerant is discharged into a discharge pipe. The compressor includes an elastic member having hooks formed on both ends thereof, for generating a predetermined tension while being supported on the bent portion of the discharge line tube on two locations. Since vibration and noise can be reduced significantly, appliances that require the compressor as an essential element can provide optimum environment to users.

Abstract: The present invention relates to a stable injectable composition containing prostaglandin E.sub.1. More specifically, the present invention relates to a stable injectable composition which is prepared by dissolving prostaglandin E.sub.1 in sodium citrate/citric acid buffer solution, filtering the resulting soultion under aseptic condition and then lyophilizing the filtrate, and wherein prostaglandin E.sub.1 is stably maintained even when the composition is stored for a long period.

Abstract: A hermetically sealed compressor includes a cylinder forming a compression chamber, and a piston reciprocally mounted in the cylinder for compressing gaseous refrigerant. A mixture of gaseous refrigerant and lubricating oil is conducted via a conduit arrangement to a suction muffler located upstream of the compression chamber. The conduit arrangement includes, at an inlet to the suction muffler, radially inner and outer tubes forming a channel therebetween. Gaseous refrigerant flows into the suction muffler through the inner tube. Lubricating oil traveling radially outwardly of the gaseous refrigerant enters the channel and is discharged from a downstream end of channel and thus does not enter the suction muffler.

Abstract: A reciprocating compressor includes a cylindrical bore in which a piston reciprocates. A cylinder head is situated adjacent an end of the bore and forms a suction chamber and a discharge chamber which communicate with the bore through respective valved passages. Fluid to be compressed enters the suction chamber through an outlet section of a muffler. That outlet section is made of a material having low thermal conductivity (plastic) and fits into the suction chamber to resist the transfer of heat to the suction chamber from the discharge chamber. A capillary tube includes an inlet end submerged in an oil reservoir and an outlet end mounted in a hole formed in the outlet section of the muffler for supplying oil to fluid entering the bore.

Abstract: An oil separator for an evaporator in a cooling system is installed between a capillary tube and the evaporator for separating oil from the refrigerant flowing into the evaporator. The oil separator comprises an inflow member connected to the capillary tube, for receiving the oil-containing refrigerant therefrom. A refrigerant outflow member is connected between the inflow member and an inlet of the evaporator, for conducting the refrigerant upward to the inlet of the evaporator. An oil outflow member is disposed between the inflow member and an outlet of the evaporator, for conducting the oil downward to an outlet of the evaporator. The oil separator prevents oil from flowing into the evaporator, thereby preventing accumulation of the oil inside the evaporator which could reduce the amount of oil disposed inside a compressor of the cooling system.

Abstract: A hermetic reciprocating compressor comprises a hermetic casing and a compressing portion installed inside the casing. The compressing portion includes a cylinder, and a piston reciprocating inside the cylinder. A suction pipe transfers a mixture of compressible and incompressible media (e.g. gaseous refrigerant and lubricating oil) into the casing. A suction muffler has an inlet communicating with the suction pipe and an outlet connected to the compressing portion. A tubular spring has a first end portion of frusto-conical shape fitted into the inlet of the suction muffler so that a space is formed between the first end portion of the spring and the inlet of the suction muffler, and a second end portion connected to the suction pipe. Incompressible medium in the mixture is able to gravitate out of the suction muffler through the space, thereby preventing damage to internal parts of the compressing portion.

Abstract: A reciprocating compressor includes a cylindrical bore in which a piston reciprocates. A cylinder head is situated adjacent an end of the bore and forms a suction chamber and a discharge chamber which communicate with the bore through respective valved passages. Fluid to be compressed enters the suction chamber through an outlet section of a muffler. That outlet section is made of a material having low thermal conductivity (plastic) and fits into the suction chamber to resist the transfer of heat to the suction chamber from the discharge chamber. A capillary tube includes an inlet end submerged in an oil reservoir and an outlet end mounted in a hole formed in the outlet section of the muffler for supplying oil to fluid entering the bore.

Abstract: A reciprocating compressor includes a piston mounted for reciprocation in a bore of a cylinder. A cylinder head is mounted on the cylinder at one end of the bore for conducting fluid to and from the bore. A muffler is connected to the cylinder head for conducting the fluid to the bore. The muffler includes a base member and a muffler body secured thereto. The base member includes a recess in which a leading portion of the muffler body is installed. Hooks formed on the leading portion become caught against securing edges formed in the recess to resist rearward withdrawal of the muffler body. A floor of the body is elastic, to push the hooks against the securing edges. Also, side walls of the recess push elastically against the leading portion of the muffler body. Consequently, there is no play between the muffler body and base member which could produce noisy rattling during operation of the compressor.

Abstract: A reciprocating compressor includes a cylinder block disposed in a chamber formed by a casing. A piston is mounted for reciprocation in a bore of the cylinder block. A valved cylinder head is disposed at an end of the bore. The cylinder head conducts sucked fluid to the bore. The sucked fluid enters the casing through an inlet therein and travels through a suction passage formed by a suction muffler and then through a base muffler before entering the cylinder head. The suction muffler includes exterior holes for communicating the suction passage of the suction muffler with the chamber of the casing, to thereby reduce the suction load occurring at the bore and valve plate.

Abstract: A structurally improved reciprocating compressor is disclosed. The compressor has a base muffler which acts not only as a refrigerant suction pipe and gasket but also as an arrangement for preventing heat from being transferred to the input refrigerant. The base muffler is interposed between the valves and cylinder head. Due to the base muffler, neither the motor heat nor the compressing heat is transferred to the input refrigerant passing the suction pipe part of the base muffler. The base muffler prevents an increase in the specific volume of the input refrigerant and causes smooth circulation of the refrigerant in the compressor. The present invention thus improves refrigerant compressing efficiency and refrigerating capacity of the compressor, and reduces the cost, and improves productivity of the compressor.

Abstract: A compressor includes a motor for reciprocating a piston which sucks-in refrigerant through an inlet, and discharges compressed refrigerant through an outlet. A cylinder head forms a discharge chamber communicating with the outlet, and also forms a recess disposed opposite the inlet. Mounted in the recess is a base muffler which includes a pair of elastically flexible, tapered tubes connected by a snap-in connection to a suction muffler. Refrigerant travels through the suction muffler and the base muffler to the inlet. The base muffler insulates the refrigerant from heat radiated by the motor. A capillary tube conducts oil from an oil reservoir to the base muffler for being mixed with the refrigerant.