JP2009216025A - Hermetic compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor restricted in discharge of oil by efficiently separating oil inside a sealed container, in regard to a hermetic compressor deteriorated in performance of a heat exchanger in a refrigeration cycle and deteriorated in performance of an air check device and refrigerating equipment by increasing the quantity of discharged oil out of the compressor. <P>SOLUTION: In this hermetic compressor, shape of an upper coil end 17 of a motor 2 is formed into a tapered shape so as to lead refrigerant gas mixed with oil mist to the inner wall of a sealed container, and oil is separated by making the refrigerant gas positively abut on the inner wall of the sealed container 1, and the filtered refrigerant gas is led to a discharge pipe, and the quantity of discharged oil is thereby reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hermetic compressor, and particularly relates to a hermetic compressor that is used in refrigeration equipment such as an air conditioner and a refrigerator, and is particularly suitable for improving the performance of a refrigeration cycle.

For conventional hermetic compressors, many techniques for reducing the oil discharge amount to the outside of the compressor have been disclosed. For example, in Patent Document 1, as shown in FIG. 2, a cylindrical shielding member 104 concentric with the compressor is installed in a space formed by the inner wall of the sealed container 101, the electric motor 102, and the compression mechanism 103, In addition, a discharge hole 106 of the muffler 105 is installed, and a first filter 107 that separates the refrigerant gas and an second filter 108 that is inserted into the discharge pipe are installed above the front motor 102. Thereby, the refrigerant gas mixed with oil mist is filtered by the first filter 107 and the second filter 108, and the filtered refrigerant gas is discharged from the discharge pipe to the outside of the compressor, thereby reducing the oil discharge amount. It is what.
JP 2005-113861 A

  However, in the conventional method, the oil filtered by the first and second filters may be taken out of the compressor through the discharge pipe again by the flow of the refrigerant gas. In addition, the number of parts is increased and the cost is increased.

  The present invention is for solving such problems, and is intended to reduce the oil discharge amount without increasing the number of parts so much as compared with the prior art.

  In order to solve the above-mentioned conventional problems, the coil shape of the upper part of the motor is tapered. In this way, the oil is separated by positively applying the refrigerant gas mixed with oil mist to the inner wall of the pressure vessel, and the filtered refrigerant gas is guided to the discharge pipe to reduce the oil discharge amount. In addition, it is possible to configure without increasing the number of parts as much as possible.

  The oil outflow from the discharge pipe can be reduced in the hermetic compressor of the present invention.

  The present invention houses an electric motor part and a compressor part in a sealed container, and the compressor part comprises a cylindrical cylinder, a main bearing and a secondary bearing that constitute a compression chamber on both end faces of the cylindrical cylinder, and the compression part. Surrounded by a roller that revolves in the chamber, a crankshaft that is coupled to the electric motor that imparts a revolving motion to the roller, a cylindrical inner peripheral surface of the cylinder, a cylindrical outer peripheral surface of the roller, and the main bearing and auxiliary bearing And the shape of the coil end at the upper part of the motor part is from the center of the crankshaft toward the inner wall of the sealed container. The hermetic compressor has a structure in which the inner diameter of the coil end is increased, that is, a tapered shape.

According to this configuration, the refrigerant gas mixed with oil mist discharged from the compressor unit is guided to the upper part of the hermetic container through the gap between the stator and the rotor of the electric motor or the small hole in the rotor, and the rotor. Collides with the end plate attached to the top. The colliding refrigerant gas mixed with oil mist is ejected in the radial direction by the centrifugal force of the rotor, hits the inner wall of the hermetic container along the tapered coil end, and the oil is separated from the refrigerant gas mixed with oil mist. The separated oil falls from the inner wall of the sealed container and returns to the lubricating oil reservoir at the bottom of the sealed container.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below.
(Embodiment 1)
In FIG. 1, an electric motor unit 2 and a compressor unit 3 are housed in a sealed container 1, and the compressor unit 3 includes a cylindrical cylinder 11 and a main bearing 12 that constitutes a compression chamber on both end surfaces of the cylindrical cylinder 11 and a secondary bearing. The bearing 13, the roller 14 that revolves in the compression chamber, the crankshaft 15 that is coupled to the motor unit that revolves the roller 14, the cylindrical inner peripheral surface of the cylinder 11, the cylindrical outer peripheral surface of the roller 14, and the main A coil in an upper part of the electric motor unit 2 in a hermetic compressor having a vane 16 (not shown) that partitions the sealed space surrounded by the bearing 12 and the sub-bearing 13 into a plurality of sealed spaces. The end 17 is a hermetic compressor having a structure in which the inner diameter of the coil end 17 increases from the center of the crankshaft 15 toward the inner wall of the hermetic container 1, that is, a tapered shape.

  The refrigerant gas mixed with oil mist discharged from the compressor unit 3 with the above configuration is guided to the upper portion of the hermetic container 1 through the gap between the stator 18 and the rotor 19 of the electric motor and the small hole 20 in the rotor, and rotates. It collides with the end plate 21 attached to the upper part of the child 19. The colliding refrigerant gas mixed with oil mist is ejected in the radial direction by the centrifugal force of the rotor, hits the inner wall of the hermetic container 1 along the tapered coil end, and the oil is separated from the refrigerant gas mixed with oil mist. The discharge amount can be reduced.

  As described above, the hermetic compressor according to the present invention can reduce oil discharge without increasing the number of parts, and thus can be used for refrigeration equipment such as an air conditioner closed electric compressor and a refrigerator. Applicable to.

Sectional drawing which shows the hermetic compressor in the 1st Embodiment of this invention Sectional drawing which shows the hermetic compressor in conventional embodiment

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sealed container 2 Electric motor part 3 Compressor part 11 Cylinder 12 Main bearing 13 Sub bearing 14 Roller 15 Crankshaft 17 Coil end 18 Stator 19 Rotor 20 Small hole 21 End plate 101 Sealed container 102 Electric motor part 103 Compressor part 104 Shielding Member 105 Muffler 106 Discharge hole 107 First filter 108 Second filter

Claims (3)

An electric motor part and a compressor part are housed in a sealed container, and the compressor part revolves in a cylindrical cylinder, a main bearing and a secondary bearing that constitute a compression chamber on both end faces of the cylindrical cylinder, and the compression chamber. A sealed space surrounded by a rotating roller, a crankshaft coupled to the electric motor that gives a revolving motion to the roller, a cylindrical inner peripheral surface of the cylinder, a cylindrical outer peripheral surface of the roller, and the main bearing and the auxiliary bearing , And a vane partitioning into a plurality of sealed spaces as a constituent element, wherein the shape of the coil end at the upper part of the motor section is from the center of the crankshaft toward the inner wall of the sealed container, and the coil end A hermetic compressor having a structure in which the inner diameter of the cylinder becomes larger, that is, has a tapered shape. The hermetic compressor according to claim 1, wherein HCFC, HFC or the like not containing chlorine is used as a refrigerant. The hermetic compressor according to claim 1, wherein a natural refrigerant such as carbon dioxide or ammonia is used as a refrigerant.

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