JPS603351Y2 - hermetic compressor - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a hermetic compressor driven by an electric motor supported within a hermetic container.

When a rotary compressor is used as a hermetic compressor, lubricating oil that lubricates rotating parts is mixed into the high-pressure refrigerant gas discharged from the compressor, resulting in a so-called foaming phenomenon.

Therefore, when oil is diffused into the atmosphere inside the container and high-pressure refrigerant gas containing a large amount of oil is supplied to the refrigerant device, there is a risk that the heat exchange efficiency will be significantly reduced.

FIG. 1 shows this type of hermetic compressor. In the figure, 1 is a hermetic container, 2 is an electric motor supported on the inner periphery of the hermetic container 1, 3 is a stator core, 4 is a stator coil, 5 is a rotor core, 6 is a rotating shaft, 7 is a rotary compressor driven by the electric motor 2, 8 to 15 are parts of the rotary compressor 7, 8 is a rolling piston mounted eccentrically on the rotating shaft 6, and 9 is a sealed Cylinder supported on the inner periphery of the container 1, 10.11
are upper and lower housings that sandwich the cylinder 9;
2 is a suction pipe that passes through the closed container 1 and the cylinder 9 and supplies low-pressure refrigerant gas; 13 is supplied with low-pressure refrigerant gas;
- A compressed air chamber formed between the cylinder 9, the rolling piston 8 and the upper and lower housings 10 and 11; 14, a muffler that creates an air reservoir 15 at the bottom of the lower housing 11 and seals it; 16, compressed air by the rotary compressor 7; A discharge pipe 17 for discharging the refrigerant gas to the outside of the closed container 1 is a reservoir of lubricating oil that lubricates the rotating parts of the rotary compressor 7.

With the above structure, the refrigerant gas compressed by the rotary compressor 7 reaches the electric motor 2 via the air reservoir 15 as shown by the arrow, and flows between the stator core 3 and the rotor core 5. The liquid passes through the gap, reaches the upper part of the closed container 1, and is led from the discharge pipe 16 to an external cooling device such as a condenser (not shown).

At this time, as mentioned above, the refrigerant gas contains a considerable amount of oil due to the forming phenomenon, and some of it collides with the inner wall of the upper part of the closed container 1, causing the oil to be separated, and the oil is separated from the oil reservoir 17 in the lower part. However, a considerable amount of oil flows out through the discharge pipe 16 together with the refrigerant gas, causing a reduction in heat exchange efficiency.

This invention aims to improve the above-mentioned drawbacks.

An embodiment of this invention will be described below with reference to FIGS. 2 to 4.

In the figure, the same reference numerals as in FIG. 1 indicate the same or corresponding parts, and 18 is a strainer provided at an intermediate portion between the electric motor 2 and the discharge pipe 16, the details of which are shown in FIGS. 3 and 4.

3 is a plan view, and FIG. 4 is a sectional view taken along line IV-IV in FIG. 3.

That is, as shown in the figure, the central part is made higher by a thin plate,
A passage port 18a with a low peripheral part, a central part through which high-pressure refrigerant gas passes, and an edge protruding toward the motor 2 side, and a passage port 18a with a peripheral part through which refrigerant gas passes, and lubricating oil separated from the refrigerant gas. A reflux port 18b is provided in which the oil is refluxed to the oil sump 17 and whose edge protrudes toward the electric motor 2, and the peripheral end 18c is fitted into the recess 1a of the closed container 1, as shown in FIG.

With the above structure, the high-pressure refrigerant gas mixed with lubricating oil collides with the strainer 18 while bubbling, and a considerable amount of oil is separated and refluxed to the oil sump 17, while the remaining high-pressure refrigerant gas containing oil is sent to the center. The lubricating oil passes through the passage port 18a at the periphery and the reflux port 18b at the periphery, collides with the upper inner wall of the closed container 1, and separates the remaining oil, and the separated lubricating oil is returned to the oil sump 17 from the reflux port 18b at the periphery. be done.

Therefore, most of the oil in the high-pressure refrigerant gas discharged from the discharge pipe 16 is removed.

As described above, according to this invention, by providing a strainer with a refrigerant passage opening whose edge protrudes downward between the electric motor and the discharge pipe, lubricant flows through the edge of the opening. Since the oil is not blown away by the refrigerant flow and falls smoothly, the oil component of the lubricating oil mixed in the discharged high-pressure refrigerant gas can be effectively removed, and heat exchange efficiency can be increased.

[Brief explanation of drawings]

Figure 1 is a longitudinal sectional view of a conventional hermetic compressor, Figures 2 to 4
The figures show one embodiment of this invention, in which Fig. 2 is a longitudinal sectional view, Fig. 3 is a plan view of the strainer, and Fig. 4 is IV-I of Fig. 3.
It is a V sectional view. In the figures, the same reference numerals indicate the same or corresponding parts, 1
2 is a closed container, 2 is an electric motor, 7 is a rotary compressor, 16 is a discharge port, 18 is a strainer, and 18b is a reflux port.

Claims (1)

[Scope of utility model registration request] The airtight container includes an airtight container, an electric motor supported in the airtight container, a compressor driven by the electric motor, and a discharge port provided at an upper part of the container to discharge refrigerant compressed by the compressor. In the hermetic compressor, between the electric motor and the discharge port, a center portion is closer to the discharge port side than a peripheral portion, and an edge portion between the center portion and the peripheral portion protrudes toward the electric motor side. A hermetic compressor, characterized in that it is provided with a strainer having a plurality of ports for passing the refrigerant, manufactured as described above.