hermetic compressor

Abstract

The objective of the present invention is to provide a closed compressor which enables separation of a coolant gas from a lubricant even with a fixing piece, and dedicates to improve a cooling performance in a cooling system. To solve such problem, the closed compressor comprises: a separation chamber (18) having a capacity increased for a liquid collected inside by pumping up a lubricant oil (2) by viscous pumping in case a number of rotation of the compressor is greater than usual and not to overflow towards a gas entering hole (29), and prevents the liquid from flowing toward the gas entering hole (29) by each wall of barrages (33) (a big barrage (33a) and a small barrage (33b)) installed in the upper part inside when pumping a lubricant oil (2) up by viscous pumping of a viscous pump (16a) by a hollow sleeve (19) and a fixing piece (21) upon the rotation of a crank shaft (12); dividing into the liquid and a gas (coolant gas) including a mist state in the liquid and gas separation chamber (18) in an inner diameter hollow part of a shaft (12); and supplying the liquid to a sliding part through a connection hole (17) and the gas to the upper part of a compression element through the gas entering hole (29).

Description

technical field [0001] The present invention relates to a hermetic compressor mounted in a refrigeration system for home appliances such as a refrigerator and an air conditioner (air conditioner), and a refrigerator to which the same is applied. Background technique [0002] In refrigeration systems for home appliances in recent years, the demand for high efficiency has become higher. For the hermetic compressors installed in them, in order to achieve high efficiency, it is also suitable for operating from a low operating frequency lower than the frequency of commercial power supply to a frequency equal to or greater than commercial power. A type of compressor that can operate in a wide range of a high operating frequency band of power supply frequency. [0003] However, in the above-mentioned hermetic compressor, it tends to be difficult to secure oil supply to satisfy reliability and efficiency in operation in the frequency range of the operating frequency band having a lo...

AI Technical Summary

Problems solved by technology

[0013] However, if the speed of the hermetic compressor is 3600 min higher than the normal speed -1 If the rotation speed is higher than above, it is known that the intake amount of the lubricating oil by the crankshaft is extremely increased, and the lubricating oil flows to the gas passage hole through which only the refrigerant gas should pass, clogging the gas passage hole, and causing problems in the gas discharge invention. , sometimes it is not possible to supply new lubricating oil

Especially when performing high-speed rotation for 4300min -1 In this case, the supply of lubricating oil is insufficient, the lubricating oil does not flow to the bearing side, and the sliding part is damaged.

[0014] When operating at such a high-speed rotation, if it is the hermetic compressor mounted in the above-mentioned general refrigeration system for household appliances for refrigerators, even if the volume of a cavity (gas-liquid separation chamber) located at the center of the crankshaft is taken , if it becomes the volume of the separation chamber, the lubricating oil will also overflow from the separation chamber, and the lubricating oil will flow to the gas passage hole that should only pass through the refrigerant gas, thereby causing problems such as clogging the gas passage hole.

[0015] In addition, in the structure of Patent Document 1, a mechanism corresponding to a separation chamber is provided on the upper part of the viscous pump for feeding the sucked lubricating oil to the surface of the crankshaft through the oil supply hole, but as a basic structure, the specification of the gas-liquid separation chamber It is not clear, so there is concern about causing functional impairment as shown below

Specifically, since the height dimension of the internal space of the crankshaft is not clear, it is not clear whether the lubricating oil sucked by the viscous pump can be properly separated when the speed ratio of the compressor is generally increased. It is not clear whether the dikes can reliably play the role of gas-liquid separation. For example, when the gas-liquid separation chamber becomes a state where lubricating oil overflows, the dikes will not work at all, and in this state, it is impossible to dissolve the The refrigerant gas in the lubricating oil returns to the cooling application. Therefore, if a large amount of refrigerant dissolves into the lubricating oil, there will be a problem of insufficient refrigerant, or the refrigerant gas will flow into the bearing side, and the lubricating oil supply will be cut off, causing damage to the sliding part. The problem

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