JPH02267388A - Horizontal type rotary compressor - Google Patents

Abstract

PURPOSE:To prevent lubricating oil from being discharged through a discharge pipe without being separated from a discharge gas to reduce the amount of circulation of the lubricating oil, by providing a reverse L-shaped gas vent pipe in an oil sump and intersecting the outlet end of the pipe with the discharge pipe. CONSTITUTION:A discharge gas compressed in a cylinder 12 is injected into a large-diameter oil feeding pipe 9 opening into the lubricating oil 8 stored in the bottom of a closed container 1 after it flows from a discharge muffler 6 to a small-diameter discharge gas pipe 7, and led into an oil sump 11. As a result, the lubricating oil 8 is sucked by the discharge gas to lubricate the bearing portions, etc., of an eccentric shaft 4. In this case, the discharge gas is discharged from the outlet end 15a of a gas vent pipe 15, with the lubricating oil 8 contained in a part of it, and separated from the lubricating oil due to large variation in volume. Since the outlet end 15b of the gas vent pipe 15 is intersected with a discharge pipe 14, the lubricating oil 8 can not be discharged from the opening end 14a of the discharge pipe 14 before it is separated from the discharge gas.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a horizontal rotary compressor incorporated in a refrigeration cycle, and particularly to a horizontal rotary compressor with an improved lubricating oil supply device.

[Conventional technology]

4 and 5 are a partially vertical side view of a conventional horizontal rotary pressure Wj4'A disclosed in Japanese Patent Application Laid-Open No. 101293/1983, and a sectional view taken along the line V-V in FIG. 4. It is. 1st
2, 1 is a closed container, 2 is an electric element, and 3 is a sealed container.
is a compression element driven by the electric element 2 and housed in the closed container 1 together with the electric element 2. Reference numeral 4 denotes an eccentric shaft rotated by the electric element 2, 5 a rotary biston rod that rotates homeward within the cylinder 12, 6 a discharge muffler provided on the main bearing 13 that closes one end surface of the nozzle 12, and 7 a discharge muffler 6. A small-diameter discharge gas pipe is connected, 8 is lubricating oil stored in the bottom of the closed container 1, 9 is a thick oil supply pipe, 10 is an end bearing that closes the other end surface of the spring log 12, and 11 is a bearing for the eccentric shaft 4. It is an oil sump container whose end is covered and fixed to an end bearing 10, and an oil supply pipe 9 is connected to the oil sump container 11 and opened into the lubricating oil 8. 4a is a hole provided in the axial direction of the return shaft 4, lla is a gas vent hole provided in the upper part of the oil sump container 11, and 14 is a discharge pipe fixed to the closed container 1. Next, the operation of this horizontal rotary compressor will be explained. When the electric element 2 is driven to rotate the eccentric shaft 4 and the rotary piston 5 within the cylinder 12, the refrigerant gas is compressed within the cylinder 12 and is discharged into the discharge muffler 6 via a discharge valve (not shown). . This discharged gas is ejected through a small-diameter discharge gas pipe 7 into a large-diameter oil supply pipe 9 opened within lubricating oil 8 stored at the bottom of the closed container 1 . As a result, the lubricating oil 8 is sucked into the oil supply pipe 9 and guided into the oil sump container 11 along with the discharged gas to lubricate the eccentric shaft 4 and slide through the hole 4a in the eccentric shaft 4. It passes through while lubricating the parts and is discharged into the closed container 1. In this case, since the eccentric shaft 4 is lubricated by the lubricating oil accompanied by the discharge gas, the temperature of the lubricating oil increases, reducing the original fA sliding effect, and the low-pressure refrigerant gas sucked by the discharge gas. The refrigerant gas in the discharge gas is easily mixed into the refrigerant gas, reducing the efficiency of the compressor. Therefore, conventionally, a gas vent hole 11a is provided above the eccentric shaft 4 of the oil sump container 11, and the discharge gas is released into the closed container 1 from the gas vent hole 11a, and the sliding parts such as the eccentric shaft 4 are discharged. The lubrication effect is improved by lubricating with lubricating oil that contains less gas.

[Problem to be solved by the invention]

A conventional horizontal rotary compressor is configured as described above.
Since the gas vent hole 11a is located close to the inlet opening 14a of the discharge pipe 14, which is fixed to the closed container 1 by passing through it, the lubricating oil released from the gas vent hole 11a together with the discharge gas flows into the discharge pipe. 14 to the outside of the sealed container 1 through the inlet opening 14a of the lubricating oil 14, the amount of lubricating oil circulated during the refrigeration cycle increases and the refrigeration capacity decreases, and the lubricating oil 8 in the sealed container 1 decreases and compresses. This had the problem of reducing the reliability of the machine. This invention was made to solve the above-mentioned problems, and by reducing the amount of lubricating oil circulated during the refrigeration cycle, it prevents a decrease in refrigeration capacity and also reduces the amount of lubricating oil in the container. The aim is to obtain a highly reliable horizontally mounted rotary compressor.

[Means to solve the problem]

In the horizontal rotary compressor according to the present invention, an oil sump container is provided with a substantially inverted gas vent pipe, and the gas outlet side end of the gas vent pipe is opened on the oil sump container side in the closed container. It is arranged in a direction that intersects with the discharge pipe.

[Effect]

In the horizontal rotary compressor according to the present invention, the discharge gas led to the oil sump container is discharged into the closed container from the substantially inverted gas vent pipe, and the gas outlet side end of the gas vent pipe is the discharge gas. In addition to intersecting the pipe, the outlet end of the gas 1 friend pipe is separated from the opening of the discharge pipe, so that the lubricating oil released from the gas vent pipe together with the refrigerant gas is mixed with the discharge gas in the sealed container. The gas is sufficiently separated and only this discharged gas is led out of the closed container via the discharge pipe.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In Figures 1, 2 and 3, 1 is a closed container, 2
is an electric element, 3 is a compression element, 4 is an eccentric shaft, 5 is a rotating piston, 6 is a discharge muffler, 7 is a discharge gas pipe, 8 is lubricating oil, 9 is an oil supply pipe, 10 is an end bearing, 11 is an oil sump container,
12 is a cylinder, 13 is a main bearing, 14 is a discharge pipe,
Further, 4a is a hole in the return shaft 4, and 14a is an inlet opening of the discharge pipe 14 on the side of the closed container 1 and the inner curved reservoir 11, and these parts are the same as those shown in FIGS. 4 and 5 above, or This is a considerable portion. 15 is a gas venting pipe provided at the upper end of the oil sump container 11 fixed to the end bearing 10;
The outlet end 15b of the discharge pipe 14 is bent substantially horizontally and is arranged substantially perpendicular to the inlet opening 14a in the closed container 1 of the discharge pipe 14 extending in the direction of extension of the central axis of the compressor. , are arranged in a relationship of θ÷90° with respect to the central axis of the compressor, and the outlet end 12a faces the inner circumferential surface of the closed container 1. Note that the configuration of this embodiment other than the above is as follows:
This is similar to the conventional one shown in FIGS. 4 and 5. In the horizontal rotary compressor of the embodiment configured as described above, the discharge gas compressed in the cylinder 12 is passed through the discharge muffler 6 to the small diameter discharge gas pipe 7, and from this pipe 7 to the closed container. The oil is introduced into a large diameter oil supply pipe 9 that opens into the lubricating oil 8 stored at the inner bottom of the lubricating oil 1 and is ejected. Due to this jetting action, the discharged gas is passed through the oil supply pipe 9 and guided to the oil sump container 11, and the lubricating oil 8 is sucked by the discharged gas and guided to the oil sump container 11 through the oil supply pipe 9.
is further guided to sliding parts such as bearings of the eccentric glaze 4, and after lubricating these sliding parts, is returned to the bottom of the closed container 1. The lubricating oil 8 that has entered the oil sump container 11 after being mixed with the discharged gas from the oil supply pipe 9 is generally separated from the discharged gas and the lubricating oil 8 that has entered the oil sump container 11 is separated from the discharged gas because the traveling direction of the discharged gas changes rapidly. stored at the bottom. Further, when the discharged gas partially contains lubricating oil and exits from the outlet end 15a of the substantially inverted gas vent pipe 15, it is sufficiently separated from the lubricating oil due to a large volume change. The outlet end 15a of the gas vent pipe 15 is connected to the discharge pipe 14.
In addition, the outlet opening 14a of the gas vent pipe 15 is not at a close distance from the inlet opening 14a in the airtight container 1 as in the conventional example.
b intersects with the discharge pipe 14, so the gas vent pipe 1
The discharge gas discharged from the outlet end 15a of No. 5 and 1. J lubricating oil is not led out of the closed container 1 from the open end 14a of the discharge pipe 14 before being separated. In the above embodiment, the direction of the outlet side end 15b of the gas vent pipe 15, which is formed in a substantially inverted shape, is substantially perpendicular to the central axis of the compressor (θ ÷ 90° in FIG. 3) and intersects it. However, in the present invention, there is no problem even if θ is set to 90°, and in this case, the distance between the inlet opening 14a of the discharge pipe 140 and the outlet end 15a of the gas venting pipe 15 becomes larger. The effect of separating fAm oil becomes greater.

【Effect of the invention】

As explained above, in this invention, the lubricating oil is separated from the discharged gas by providing an almost inverted gas handling pipe in the oil sump container and crossing the outlet end of this pipe with the discharge pipe. This prevents the lubricating oil from being discharged out of the sealed container through the discharge pipe without being released, thereby reducing the circulation of lubricating oil during the 15-freeze cycle, reducing the refrigerating capacity of the compressor and reducing the amount of lubricating oil in the sealed container. This has the effect that a highly reliable horizontal rotary compressor can be obtained.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a partially vertically sectional side view showing a horizontal rotary compressor according to an embodiment of the present invention, and FIG.
3 is a cross-sectional view taken along the line II, and Figure 3 is a plan view of the section viewed from the
The figure is a partially longitudinal side view showing a conventional mechanical rotary compressor, and FIG. 5 is a sectional view taken along the line ■--■ in FIG. 4. 1 ・Airtight container, 3 Compression element, 7 Discharge gas pipe,
8 Lubricating oil, 9 Oil supply pipe, 10 End bearing, 11 Oil sump container, 14 Discharge pipe, 14a Inlet opening, 15 Gas vent pipe, 15a Outlet side end, 15b Gas outlet side end. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] The discharged gas is passed through a small-diameter discharge gas pipe and guided into a thick oil supply pipe that opens into the lubricating oil stored at the bottom of the closed container and is ejected, and this ejection action causes the lubricating oil to pass through the oil supply pipe, In a horizontal rotary compressor that covers the bearing end of the eccentric shaft and guides the oil to a sump container fixed to the end bearing, and further supplies the oil to the sliding part, an approximately inverted L-shaped gas vent is installed in the oil sump container. A horizontal rotary compressor, characterized in that a pipe is provided, and the gas outlet side end of the gas vent pipe is arranged in a direction crossing a discharge pipe that opens toward the oil sump container in the closed container. .