JP2737229B2 - Horizontal rotary compressor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

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

[Prior art]

FIG. 4 and FIG. 5 are a side view in which a portion of a conventional horizontal rotary compressor disclosed in Japanese Patent Application Laid-Open No. Sho 60-101293 is cut longitudinally and a cross-sectional view taken along the line VV in FIG. . 4 and 5, 1 is a closed container, 2 is an electric element, and 3 is an electric element 2.
The closed container 1 is driven by the
It is a compression element housed inside. 4 is an eccentric shaft rotated by the electric element 2, 5 is a rotating piston eccentrically rotating within the cylinder 12, 6 is a main bearing 13 that closes one end face of the cylinder 12
, A discharge gas pipe 7 having a small diameter connected to the discharge muffler 6, a lubricating oil 8 stored in the bottom of the closed vessel 1, a lubrication pipe 9 having a large diameter, and a cylinder 12 having a large diameter.
Is an oil reservoir that covers the bearing end of the eccentric shaft 4 and is fixed to the end bearing 10. An oil supply pipe 9 is connected to the oil reservoir 11 so that the lubricating oil 8 It is open. 4a is a hole provided in the eccentric shaft 4 along the axial direction.
a is a gas vent hole provided in the upper part of the oil reservoir 11, and 14 is a discharge pipe fixed to the closed container 1. Next, the operation of the horizontal rotary compressor will be described. When the eccentric shaft 4 and the rotary piston 5 rotate in the cylinder 12 by driving the electric element 2, the refrigerant gas is compressed in the cylinder 12 and discharged into the discharge muffler 6 via a discharge valve (not shown). . This discharge gas is ejected through a small-diameter discharge gas pipe 7 into a large-diameter oil supply pipe 9 opened in a lubricating oil 8 stored in the bottom of the sealed container 1. As a result, the lubricating oil 8 is sucked into the oil supply pipe 9 and is guided into the oil reservoir 11 together with the discharged gas.
The lubrication is performed and the sliding portion is discharged through the hole 4a in the eccentric shaft 4 into the closed container 1 while lubricating the sliding portion. In this case, since the lubrication of the eccentric shaft 4 is performed by the lubricating oil accompanied by the discharge gas, the temperature of the lubricating oil increases, the original lubrication effect is reduced, and the discharge gas is reduced to the low-pressure refrigerant gas into which the discharge gas is sucked. It is easy to mix, and the efficiency of the compressor is reduced by mixing the discharge gas with the refrigerant gas. Therefore, conventionally, a gas vent hole 11a is provided above the eccentric shaft 4 of the oil reservoir 11, and the discharge gas is released from the gas vent hole 11a into the closed container 1, and the sliding portion such as the eccentric shaft 4 is discharged. Lubricate with lubricating oil with a low gas mixing rate,
Improves the lubrication effect.

[Problems to be solved by the invention]

The conventional horizontal rotary compressor is configured as described above, and the gas vent hole 11a is disposed at a short distance from the inlet opening 14a of the discharge pipe 14 fixed through the closed container 1 through the same. The lubricating oil released together with the discharge gas from the gas vent hole 11a flows through the inlet opening 14a of the discharge pipe 14 into the closed container 1
It is led to the outside, and the circulating amount of the lubricating oil in the refrigeration cycle increases and the refrigerating capacity decreases, or the lubricating oil 8 in the closed container 1 decreases and the reliability of the compressor decreases. There was a problem. The present invention has been made in order to solve the above-described problems. By reducing the amount of lubricating oil circulating in a refrigeration cycle, it is possible to prevent a decrease in refrigeration capacity and to reduce lubricating oil in a container. And to obtain a highly reliable horizontal rotary compressor.

[Means for Solving the Problems]

In the horizontal type rotary compressor according to the present invention, a substantially inverted L-shaped gas vent pipe is provided in the oil reservoir, and a gas outlet side end of the gas vent pipe is opened to the oil reservoir side in the closed container. It is arranged in a direction crossing the discharge pipe to be operated.

[Action]

In the horizontal rotary compressor according to the present invention, the discharge gas guided to the oil reservoir is discharged from the substantially inverted L-shaped gas vent pipe into the closed vessel, and the gas outlet side end of the gas vent pipe is discharged. The crossing of the pipe and the outlet end of the degassing pipe are separated from the opening of the discharge pipe, so that the lubricating oil released from the degassing pipe together with the refrigerant gas is sufficiently mixed with the discharged gas in the closed container. It is separated and only this discharge gas is led out of the closed vessel via the discharge pipe.

【Example】

An embodiment of the present invention will be described below with reference to FIGS. 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, and 11 is an oil reservoir. , 12
Is a cylinder, 13 is a main bearing, 14 is a discharge pipe, 4a is a hole of the eccentric shaft 4, 14a is a closed vessel 1 of the discharge pipe 14,
The first side is an inlet opening, and these parts are the fourth
It is the same as or equivalent to that shown in FIGS. Reference numeral 15 denotes a gas vent pipe provided at the upper end of the oil reservoir 11 fixed to the end bearing 10, and the gas vent pipe 15 has an outlet-side end 15b bent substantially horizontally, extending the central axis of the compressor. The discharge pipe 14 extending in the direction is disposed so as to be substantially perpendicular to the inlet opening 14a in the closed vessel 1, that is, in FIG. 3, the discharge pipe 14 is disposed in a relationship of θ {90} with respect to the center axis of the compressor,
The outlet end 12a faces the inner peripheral surface of the closed container 1. In addition,
The configuration of this embodiment other than that described above is the same as the conventional configuration 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 discharge gas pipe 7 having a small diameter, and the pipe 7 1 is guided and ejected to a large-diameter oil supply pipe 9 opening into the lubricating oil 8 stored in the inner bottom portion. By this jetting action, the discharge gas is passed through the oil supply pipe 9 and guided to the oil reservoir 11, and the lubricating oil 8 is sucked by the discharge gas, guided to the oil reservoir 11 via the oil supply pipe 9, and further discharged from the container 11. It is guided to sliding parts such as a bearing part of the eccentric shaft 4, and after lubricating these sliding parts, it is returned to the bottom in the sealed container 1. Then, the lubricating oil 8 mixed with the discharge gas from the oil supply pipe 9 and entering the oil reservoir 11 is largely separated from the discharge gas because the traveling direction of the discharge gas changes abruptly. It is stored at the bottom. Further, when the discharge gas exits from the outlet end 15a of the substantially inverted L-shaped gas vent pipe 15 with a part of the lubricating oil contained therein, the discharge gas is sufficiently separated from the lubricating oil by a large volume change. Outlet end 15 of the degassing pipe 15
a is not close to the inlet opening 14a of the discharge pipe 14 in the closed vessel 1 as in the conventional example, and the outlet end 15b of the gas vent pipe 15 intersects with the discharge pipe 14. The discharge gas and the lubricating oil discharged from the outlet end 15a of the extraction pipe 15 are not led out of the closed vessel 1 from the open end 14a of the discharge pipe 14 before being separated. Since the specific gravity of the lubricating oil is greater than that of the discharge gas, when the lubricating oil 8 discharged from the oil reservoir 11 collides with the inner surface of the degassing pipe 15, a part of the lubricating oil falls and falls inside the oil reservoir 11. Return to For this reason, the lubricating oil 8 is separated by the gas vent pipe 15, and the amount of the lubricating oil 8 discharged to the outside of the oil reservoir 11 is reduced. In the above embodiment, the direction of the outlet side end portion 15b of the gas vent pipe 15 formed substantially in an inverted L-shape is substantially perpendicular to the center axis of the compressor (θ３90 ° in FIG. 3) and intersects. However, in the present invention, there is no problem if θ <90 °. In this case, the inlet opening 14a of the discharge pipe 14 is formed.
And the distance from the outlet end 15a of the degassing pipe 15 becomes larger, so that the lubricating oil separating effect increases.

【The invention's effect】

As described above, according to the present invention, a discharge gas is passed through a small-diameter discharge gas pipe, guided into a large-diameter oil supply pipe that opens into lubricating oil stored in the bottom of the sealed container, and ejected. The oil is led through an oil supply pipe to an oil reservoir that covers the bearing end of the eccentric shaft of the compression element provided in the closed vessel and is fixed to the end bearing. A horizontal inverted rotary compressor in which a discharge pipe for leading the oil out of the closed container is disposed on the compression element side of the closed container, a substantially inverted L-shaped gas vent pipe communicating with the upper part of the oil reservoir is provided. The gas outlet side of the gas discharge pipe is disposed in a direction crossing the length of the gas outlet side end thereof with respect to the length of the discharge pipe opening toward the oil reservoir side, and the open end of the gas outlet side end is disposed inside the closed vessel of the discharge pipe. Placed away from opening Than it is. Also, since the specific gravity of the lubricating oil is greater than the discharge gas,
When the lubricating oil discharged from the oil reservoir collides with the inner surface of the degassing pipe, a part of the lubricating oil falls and returns into the oil reservoir. For this reason, the amount of lubricating oil discharged to the outside of the oil reservoir is reduced by the lubricating oil separating action of the gas vent pipe. As a result, the lubricating oil can be prevented from being led out of the closed vessel via the discharge pipe without being separated from the discharge gas.Therefore, the amount of lubricating oil circulating in the refrigeration cycle can be reduced, and the refrigerating capacity of the compressor decreases. In addition, it is possible to prevent a decrease in the amount of lubricating oil in the sealed container, and to obtain a highly reliable horizontal rotary compressor.

[Brief description of the drawings]

FIG. 1 is a side view of a horizontal type rotary compressor according to an embodiment of the present invention, which is partially cut away, and FIG. 2 is a sectional view taken along the line II-II of FIG.
FIG. 3 is a plan view of a part of the conventional horizontal rotary compressor shown in FIG. 1, FIG. 3 is a side view of the conventional rotary compressor, and FIG. FIG. 5 is a sectional view taken along line V. 1 ... closed container, 3 ... compression element, 7 ... discharge gas pipe, 8 ... lubricating oil, 9 ... oil supply pipe, 10 ... end bearing,
11 ... oil reservoir, 14 ... discharge pipe, 14a ... inlet opening, 15
... gas vent pipe, 15a ... outlet end, 15b ... gas outlet side end. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hidehiko Yamada 3-18-1, Oka, Shizuoka-shi, Shizuoka Mitsubishi Electric Corporation Shizuoka Works (56) References JP-A-60-233382 (JP, A) 61-88091 (JP, U)

Claims (1)

(57) [Claims] 1. A discharge gas is passed through a small-diameter discharge gas pipe, guided into a large-diameter oil supply pipe that opens into a lubricating oil stored in the bottom of the sealed container, and is jetted out. The oil supply pipe passes through the oil supply pipe, leads to an oil reservoir fixed to an end bearing, covering the bearing end of the eccentric shaft of the compression element provided in the closed container, and further supplies the oil to the sliding portion of the compression element and discharges the oil. In a horizontal rotary compressor in which a discharge pipe for drawing gas out of the closed container is arranged on the compression element side of the closed container, a substantially inverted L-shaped gas vent pipe communicating with an upper portion of the oil reservoir is provided. Along with the length of the discharge pipe opening on the oil reservoir side in the closed container, the gas outlet pipe is disposed in a direction crossing the length of the gas outlet side end of the gas vent pipe, and the gas outlet side end is Open end above discharge pipe Horizontal postfix rotary compressor, characterized in that arranged at a position away from the closed container opening.