JP2008031912A - Hermetic compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic compressor surely reducing delivery quantity of refrigerator oil contained in refrigerant compressed in a compression mechanism part and delivered from a delivery pipe at low cost without using a complicated structure of a high material cost. <P>SOLUTION: A mesh 3 combining metal or synthetic resin fiber in a solid mesh shape is attached on an upper part of a motor part stator 2a of an inner circumference of a hermetic vessel 1 of the hermetic compressor, and refrigerator oil 4 in compressed refrigerant 5 passing through gaps at an outer circumference of the motor part stator 2a is made to adhere on the mesh 3 to separate the refrigerator oil 4 from the compressed refrigerant 5. The hermetic compressor of low refrigerator oil delivery quantity is provided thereby. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to reducing the amount of refrigeration oil discharged from a hermetic compressor used in refrigerators, air conditioners, dryers, and the like.

  Conventionally, as this type of hermetic compressor, a hermetic container has a compression mechanism part and an electric motor part, and refrigeration oil for lubricating the sliding part of the compression mechanism part is enclosed in the hermetic container. The refrigeration oil is supplied to the bearing part by rotation of the crankshaft directly connected to the rotor of the motor part, and then returns to the sealed container again. And is discharged from the discharge pipe to the refrigeration cycle.

  In the above-described conventional configuration, the sprayed refrigerating machine oil is directly sent to the discharge pipe through the gap on the outer periphery of the stator of the electric motor unit, which may increase the refrigerating machine oil discharge amount.

  As a conventional technique for solving this problem, as shown in FIG. 2, a technique in which a refrigerating machine oil separator having a refrigerating machine oil separator in a discharge pipe and a path for returning the refrigerating machine oil in a sealed container is provided. (For example, refer to Patent Document 1).

FIG. 2 shows a conventional hermetic compressor described in Patent Document 1. As shown in FIG. As shown in FIG. 2, it is comprised from the airtight container 1, the motor part stator 2a, the motor part rotor 2b, the refrigerator oil separator 29, and the discharge pipe 6. As shown in FIG.
JP-A-5-195975

  However, the conventional configuration has a problem that the refrigerating machine oil separator having a path for returning the refrigerating machine oil separator and the refrigerating machine oil is complicated and the material cost increases.

  An object of the present invention is to provide a hermetic compressor that reliably and inexpensively reduces the discharge amount of refrigeration oil contained in a compressed refrigerant that is compressed by a compression mechanism and discharged from a discharge pipe.

  In order to solve the conventional problem, a refrigerator oil capturing means (hereinafter referred to as “mesh”) is attached to the upper part of the motor part stator on the inner periphery of the hermetic container, and has passed through the gap on the outer periphery of the motor part stator. A refrigerating machine oil in a compressed refrigerant is adhered to the mesh, and the refrigerating machine oil is separated from the compressed refrigerant, whereby a hermetic compressor having a low refrigerating machine oil discharge amount can be configured.

  The hermetic compressor of the present invention can reduce the amount of refrigerating machine oil discharged.

According to a first aspect of the present invention, a compression mechanism unit driven by an electric motor unit is installed inside a sealed container, and the compression mechanism unit is lubricated by refrigerating machine oil sealed together with a refrigerant in the sealed container and compressed by the compression mechanism unit. A hermetic compressor that discharges the discharged refrigerant into the sealed container, and then passes through a gap on the outer periphery of the stator of the electric motor unit and discharges it from the discharge pipe located near the outer periphery of the upper shell of the sealed container to the outside of the compressor. A mesh is attached to the upper part of the motor part stator on the inner periphery of the hermetic container, and the refrigerating machine oil that has passed through the gap on the outer periphery of the motor part stator is attached to the mesh, so that the refrigerating machine oil is discharged into the discharge pipe. More discharging can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a cross-sectional view of a hermetic compressor according to a first embodiment of the present invention.

  In FIG. 1, a mesh 3 is attached to the upper part of the motor part stator 2a on the inner periphery of the hermetic container of the hermetic compressor 1, and the refrigerating machine oil 4 in the compressed refrigerant 5 passing through the gap on the outer periphery of the motor part stator 2a is meshed. 3, the refrigerating machine oil 4 is separated from the compressed refrigerant 5, and a hermetic compressor with a low refrigerating machine oil discharge amount can be provided. As the mesh, a combination of metals and synthetic resin fibers in a three-dimensional network, porous ceramics, or the like can be used.

  As described above, the hermetic compressor according to the present invention can be applied to an application using a heat pump because the discharge amount of refrigerating machine oil can be reduced.

Sectional drawing of the principal part of the hermetic compressor in Embodiment 1 of this invention. Sectional view of the main part of a conventional compression mechanism

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Electric motor part 2a Electric motor part stator 2b Electric motor part rotor 3 Mesh 4 Refrigerator oil 5 Compressed refrigerant 6 Discharge pipe 7 Compression mechanism part 8 Upper shell 9 Refrigerator oil separator
10 Crankshaft 11 Bearing

Claims (1)

A compression mechanism driven by an electric motor is installed inside the sealed container. The compression mechanism is lubricated by refrigerating machine oil enclosed with the refrigerant in the sealed container, and the refrigerant compressed by the compression mechanism is transferred to the sealed container. A hermetic compressor that passes through the gap of the electric motor part and discharges outside the compressor from a discharge pipe located near the outer periphery of the upper shell of the hermetic container, A hermetic compressor in which a mesh is attached at a position where the refrigerating machine oil that has passed through the gap on the outer periphery of the motor unit collides with the upper part of the stator.

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