Refrigerant compressor having an open type refrigerant pool and an oil reservoir

DETAILED DESCRIPTION A refrigerant compressor of the present invention comprises: a casing forming an oil reservoir at its bottom portion; a compression element disposed in an upper position inside the casing; a motor which is disposed in a lower position inside the casing and drives the compression element; and a partition which is provided between the oil reservoir and the motor and defines an upwardly opened type inhaled refrigerant pool for reserving liquid refrigerant inhaled from a suction pipe around the motor.
According to the above invention, in the normal operating state, the gas refrigerant inhaled from the suction pipe can be once introduced into the inhaled refrigerant pool and then guided from the inhaled refrigerant pool to the compression element side through an air gap between a stator core and a rotor core of the motor.
Therefore, the motor can be satisfactorily cooled by the inhaled gas refrigerant, and consequently, a range of operation can be expanded without sacrificing COP (coefficient of performance).
Furthermore, when a liquid reflux occurs in a starting stage at a low temperature or in a similar case, the liquid refrigerant inhaled from the suction pipe can be reserved in the inhaled refrigerant pool defined by the partition and not in the oil reservoir.
Therefore, the possible occurrence of dilution of oil in the oil reservoir because of the dissolution of the liquid refrigerant into the oil is prevented, so that the possible occurrence of deficient lubrication at sliding sections due to a reduction of oil concentration can be prevented, thereby allowing the reliability of the sliding sections to be improved.
Furthermore, by preventing the dissolution of the liquid refrigerant into the oil by virtue of the inhaled refrigerant pool, the possible occurrence of bubble formation in the oil at a bearing gap of sliding sections is prevented, i.
e.
, the possible occurrence of oil film breakage due to bubble formation in the refrigerant at the sliding sections can be prevented