JPS63138175A - Sealed compressor - Google Patents

Abstract

PURPOSE:To facilitate separation of waste from gas by forming a gas bleeder hole, which is to put oil supply hole formed in a rotary shaft in a single piece with a crank shaft stretching in the longitudinal direction of the compressing mechanism in communication with a sealed vessel in such an arrangement that its backmost part is inclined lower, and forming this backmost part to be used as a waster storage hole. CONSTITUTION:In this sealed compressor, a crank shaft 8 is rotated by a motor part through a rotary shaft 8a to which the rotor of said motor part is fixed, and a piston 7 of the compressor part is reciprocated through a connecting rod 9, to compress the refrigerant and discharge. At this time, the refrigerator oil 14 is sucked through an oil lead-in hole 16 formed at the bottom of said rotary shaft 8a, and supplied to parts to be lubricated via an oil supply hole 17 formed inclined. Here a gas bleeder hole 18 to put the oil supply hole 17 in communication to inside the sealed vessel is formed in the rotary shaft 8a in such a way that the backmost portion is inclined lower, and this backmost portion is made deeper than the oil supply hole 17 so as to be used as a waste storage hole 19, which shall serve separation and removal of waste from the gas.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a hermetic compressor used in refrigerators, air conditioners, etc.

BACKGROUND OF THE INVENTION In recent years, hermetic compressors have been made smaller, lighter, and more efficient, and various improvements have been made to ensure that they can withstand long-term use, and their reliability has significantly improved.

An example of the conventional hermetic compressor mentioned above will be described below with reference to the drawings.

FIG. 3 shows a sectional view of a conventional hermetic compressor. In the figure, reference numeral 1 denotes a motor for an electric compressor, which is composed of a stator 2 and a rotor 3, and is connected to a power source through connection terminals 4 and sealed terminals 5. 6 is piston 7, crankshaft 8
．． The compression mechanism is composed of a connecting rod 9 and a casing 1o which is the main body of the electric compressor, and has a structure in which the piston 7 is reciprocated by the rotation of the rotor 30.

Reference numeral 11 denotes a stay, which is a component that is attached to the closed container 13 together with the crank stop 12 and supports the electric compressor. Reference numeral 14 denotes refrigerating machine oil sealed in the airtight container 13, into which the lower end of the crankshaft 8 constituting the compression mechanism 6 is immersed.

FIG. 4 is a detailed view of the compression mechanism 6. In the figure 8
a is the rotating shaft of the crankshaft 8, and the rotating shaft 8a is inserted through the oil introduction hole 16 arranged at the lower end in the same window as the rotating shaft.
A gas vent hole 18 that intersects with the oil supply hole 17, which is opened diagonally upward and inclined, has one end connected to the oil supply hole and the other end extending in the axial direction of the rotating shaft above the oil level of the refrigerating machine oil 14. is connected to.

The operation of the hermetic compressor configured as above will be described below. Due to the rotational movement of the rotor 3 of the electric motor 1, the rotating shaft 8a of the crankshaft 8 also rotates,
Since the lower end of the rotating shaft 8a rotates while immersed in the refrigerator 14, centrifugal force acts on the refrigerator oil 14 in the oil supply hole 17 through the oil introduction hole 16, and a lift force corresponding to the inclination angle of the oil supply hole 17 is applied. Each sliding portion constituting the compression mechanism 6 is continuously lubricated. Then electric motor 1. The refrigerating machine oil 14 is stored on the bottom surface of the sealed container 14 through the sealed container 14 and the like, and the same operation is repeated again. Oil supply hole 17 via oil introduction hole 16
The refrigerating machine oil 14 that rises up the side of the oil supply hole 17 that is tilted away from the axis of the rotating shaft 8a due to the action of centrifugal force, and the refrigerant dissolved in the refrigerating machine oil 14 is gasified on the axis side of the rotating shaft 8a. It accumulates. Since this gas adversely affects the lubrication of the sliding parts of the compression mechanism 6, it must be discharged from the oil supply hole 17 and returned to the closed container 14 through the gas vent hole 18.

Problems to be Solved by the Invention However, with the above configuration, dust mainly consisting of metal powder remaining in the closed container is mixed in the refrigerating machine oil, so it is necessary to lubricate each sliding part that makes up the compression mechanism. When doing so, there is a problem in that dust in the refrigerating machine oil gets caught in the gap between the sliding parts and the function of the hermetic compressor stops due to the restriction of the rotor.

In view of the above problems, the present invention provides a hermetic compressor that supplies refrigerating machine oil from which dust mixed in sliding parts constituting the compressor has been separated.

Means for Solving the Problems In order to solve the above-mentioned problems, the hermetic compressor of the present invention has a gas vent hole that communicates between the oil supply hole provided on the rotating shaft of the crankshaft and the inside of the closed container, so that the gas vent hole is lowered on the side of the oil supply hole. A concave portion is provided by making the back end of the gas vent hole deeper than the oil supply hole.

Function The present invention has the above-described configuration, and by providing a recess in the oil passage of the oil supply hole to separate dust mainly consisting of metal powder mixed in the refrigerating machine oil, the dust gets caught in the gap between the sliding parts and rotates. This prevents the hermetic compressor from stopping functioning due to child restraint.

EXAMPLE FIG. 1 shows a hermetic compressor according to an example of the present invention.
A description will be given with reference to FIG. 2, but the same components as the conventional one will be denoted by the same reference numerals and detailed explanation thereof will be omitted. FIG. 2 shows details of the lower end of the rotating shaft of the crankshaft 8 in the detailed view of the compression mechanism 6 in FIG. 1. 19 in the figure
is a dust collection hole, which is a gas vent hole 1 that slopes toward the oil supply hole 17.
8 is formed by making the rear end deeper than the oil supply hole 17. The gas vent hole 18' is connected to the dust collecting hole 19' toward the open end side of the rotating shaft 8a.
It is slanted in the direction in which it is positioned downward.

The operation of the hermetic compressor configured as above will be explained. The refrigerating machine oil 14 present in the oil supply hole 17 through the oil introduction hole 16 receives centrifugal force due to the rotational movement of the rotating shaft 8a, and moves along the wall surface of the oil supply hole 17 as shown by arrow A, lubricating each sliding part. Ru. The refrigerant is dissolved in the refrigerating machine oil, and is stirred by the drive of the electric compressor, and by reducing the pressure inside the sealed container 13, etc., the refrigerant foams, becomes gaseous, and prevents the refrigerant from overflowing into the oil supply hole 17 and preventing oil supply. It passes through the gas vent hole 18 and returns into the sealed container as indicated by the arrow. In addition, refrigeration oil 14
During the above series of operations, there is also dust mixed in, mainly consisting of metal powder, and this dust moves upward along the wall of the oil supply hole 17 according to arrow A, but the gas vent hole 18 is slanted. Therefore, the refrigerating machine oil 14 is easily separated by a strong centrifugal force, and the dust, which is deposited in the dust collecting hole 19 and mainly consisting of metal powder, is not guided to each sliding surface.

As described above, according to this embodiment, by providing the inclined gas vent hole 18 having the dust collection hole 19 in the middle of the oil supply hole 17, metal powder mixed in the refrigerating machine oil can be removed from each sliding part of the compression mechanism. It is possible to prevent the movement of dust mainly consisting of , and to prevent the hermetic compressor from stopping due to rotor restriction.

Effects of the Invention As described above, the present invention provides a gas vent hole that communicates with the oil supply hole in the rotating shaft of the crankshaft through the inside of the sealed container, with the fuel hole side slanted low, and furthermore, the gas vent hole that communicates with the oil supply hole provided on the rotating shaft of the crankshaft is provided with a low slope. By making the end part deeper than the oil supply hole and providing a concave part, a dirt collection hole is formed, so dirt can be easily separated from the gas, and therefore each sliding part contains mainly metal powder mixed in the refrigerating machine oil. It is possible to prevent the movement of dust and prevent the hermetic compressor from stopping due to rotor restriction.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a compression mechanism of a hermetic compressor according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the lower part of the crankshaft in Fig. 1, and Fig. 3 is a sectional view of a conventional hermetic compressor. figure,
FIG. 4 is a sectional view of the compression mechanism of FIG. 3. 8... Crankshaft, 8a... Rotating shaft, 13... Sealed container, 16... Oil introduction hole, 17... Oil supply hole , 18... Gas vent hole, 19... Dust collection hole. Name of agent: Patent attorney Toshio Nakao and 1 other person3-
--Crankshaft 8α-11 Giant I Medical details 161--Oil, etc. bid t''t---4 Matching white each 18-11 Gas vent hole N2 Figure 3 Figure 4

Claims (1)

[Claims] A compression mechanism having a vertical crankshaft rotation axis is housed in an airtight container, and an oil supply hole is provided diagonally upwardly with respect to the rotation axis, and the oil supply hole is sealed in the crankshaft rotation axis. A sealed container characterized in that a gas vent hole that communicates with the inside of the container is provided with a back end inclined low, and a dirt collection hole is provided by making the back end of the gas vent hole deeper than the oil supply hole. shape compressor.