JPS58101291A - Rotary compressor - Google Patents

Abstract

PURPOSE:To prevent abrasion of a roller by maintaining a constant pressure difference between high and low pressures by allowing a high pressure in a high pressure gas space within a closed container to escape in a suction passage at a low pressure, and by supplying a lubricant into a cylinder. CONSTITUTION:In the case when the pressure difference between the high pressure in a high pressure gas space 19 within a tightly closed container 3 and the low pressure in a low pressure area within a cylinder 7 becomes larger, because the spring force of a coil spring 21 is smaller than the pressure difference between the high and low pressures, a valve 20 mounted in a communicating tube 25 which communicates a suction passage 17 communicating with a cylinder 7 of compressive element to said high pressure gas space 19 within said container 3, opens a valve seat 23 and then a high pressure gas coolant 2 in said high pressure gas space 19 flows into said suction passage 17 through said communicating tube 25. As a result, since the pressure difference between the high pressure and low pressure becomes small and further a lubricant is supplied into said cylinder 7 through small apertures 26, 26 formed on said communicating tube 25, abrasion of a roller 9 can be prevented certainly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a rotary compressor, and relates to an abnormal pressure between high pressure and low pressure! ! Preventing roller wear caused by &
purpose.

To explain the conventional example shown in FIGS. 1 and 2,
(1) is a closed container (3) with lubricating oil (2) stored at the bottom and high pressure inside. An electric element (4) is placed on the upper part and a rotary compression element (5) is placed on the lower part. It is a rotary pressure mill in which the elements are connected and housed by a rotating shaft (6).
IQIE! is inserted into the eccentric part (8) of 6) in a loose fit and rotates on its own axis with its tip end pressed against the roller (9) and 40-roller (by elastic means). , a sliding vane 0 that divides into a high-pressure area and a low-pressure area II within i/9 ()), and a bearing part ua that closes the opening of the V-order (7).
nn & have. Upper frame 1S and lower frame 1)
configured.

n is a suction passage T which is connected to a suction pipe connected to an external cooling circuit (not shown) and communicates with the low pressure area μυ of the fifth cylinder (7). , ' In this structure, during operation, the roller (9) that rotates eccentrically while rotating at a slower speed than the co-rotation degree of the first rotation axis (the eccentric part of the first rotation axis (61) (81) Closed valley I (
3) High pressure gas in the cylinder (7) with high pressure in the air
) When the pressure difference between the low-pressure area of the circle and the low-pressure pressure woman of When wear occurs, the layer becomes warm.

The basic structure of the present invention is that a rotary compression element and a two-rotation compression element are housed in a high-pressure airtight container with a deflection part and a lubricating oil stored in the bottom part, and a suction passage and a suction passage communicating with the cylinder of the rotary compression element. Provide a communication pipe that communicates with the high pressure gas space inside the sealed container,
The Is delivery communication rc is characterized by being provided with a valve portion that opens when an abnormally high pressure difference occurs and communicates the suction passage with the high pressure gas space, and a small hole that opens into the lubricating oil.

With this configuration, the high pressure in the high pressure gas space inside the sealed container is released to the low pressure suction passage to maintain the pressure difference between the high pressure and the low pressure at a constant pressure, and lubricating oil is supplied into the cylinder and the roller This prevents wear and tear.

The present invention will be explained below with reference to the embodiment shown in FIGS. 6 to 5. Teeth, the same parts as in the conventional example shown in FIGS.

The S%/m compared to the conventional example is the cylinder (77 holed and 9 suction 4
%IL″r# A small-diameter lead hole opens at the bottom 11, and a pulp (
A recess (2) into which a valve seat (2) is press-fitted, which houses a valve part (4) having a coil spring (2) and a coiled spring (1), and is opened and closed (1) as appropriate by a pulp.
2).

The high-pressure gas air inside the closed passenger unit (3) is attached to the valve seat.
One end is opened at IIJII, and it is a 1440-character shaped communicating tube (c).

There are nine holes drilled in the lower part of the communicating pipe to provide lubricating oil (small holes opening in 2J).

cID@- When the high pressure in the high pressure gas space α in the closed container (3) increases, or when the low F specific force in the low pressure area I of the 5th cylinder 17JP''4 decreases, etc. When the pressure difference between the low pressure and the pressure becomes large, the coil spring @1)
Since the spring force of the spring force is smaller than the pressure difference between the high pressure and the low pressure, the pulp ■ opens the valve seat C4t and the high pressure gas refrigerant flows into the suction passage 1 through the communication pipe. When the pressure M between the high pressure and the low pressure is small, the rotation of the roller (9) does not stop due to the pressure of the movable blade tta, and wear on the vending rod can be prevented.

j! When opening the valve part (2), drill nine small holes at the bottom of the delay pipe (c) and apply lubricating oil (2jt-cylinder 17).
Wear of the pressure contact between the rounding roller (9) and the sliding blade σa can be reliably prevented.

As described above, the present invention is a closed container with internal high pressure that stores lubricating oil at the bottom.
In the rotary compressor K, a communication pipe is provided that communicates the suction passage in the cylinder of the rotary compression element with the high-pressure gas 111II in the closed container, and the communication pipe is connected to the cylinder when there is an abnormally high pressure difference.
Since a valve part communicating with the suction passage and the high-pressure gas space and a small hole opening into the lubricating oil were provided.
High pressure and suction a of the high pressure gas space of the front ε sealed volume 11Pi
Pressure J with low pressure of S! If the valve part is opened to prevent the pressure difference from increasing, a small hole drilled in #4 for connecting current will supply lubricating oil to the cylinder and ensure that the roller 11. Effects such as xI＠ that can prevent wear and tear. 411T.

[Brief explanation of the drawing]

Figures 1 to 1! The figure shows a conventional example, and Figure 1 shows the rotational pressure li
I-thin vertical cross-sectional view, cross-sectional view of the second expansion rotary compressor, fifth
Figures to S@ show the present invention, Figure 6 is a sectional view of the main part of the rotary compressor, Figure 4 is an enlarged sectional view of the valve part, Figure S is a plan view and a front view of Wa-Hiro pulp, FIG. 6 shows another embodiment.
FIG. 2 is a plan view and an elevational view of the pulp. (1) Single rotation compressor, (2) --- Lubricating oil, (3J-
Closed container. (4--Electric element, (5)--Rotary compression system, (
7)-Cylinder. 111・-Suction passage, aS-・High pressure gas space, @・
...Valve part, (to), continuous pipe, - (to)...small hole.

Claims (1)

[Claims] 1. A rotary pressure machine with an electric element and a rotary compression element housed in a high-pressure sealed container with lubricating oil stored at the bottom.
1IiJ A communication pipe is provided to communicate the suction passage communicating with the high pressure gas space in the closed container in the V-order of the rotary compression element, and the communication pipe is opened in the event of an abnormally high pressure difference to connect the suction passage and the high pressure gas space. A rotary compressor characterized by having a valve portion that communicates with the lubricating oil and a small hole that opens into the lubricating oil.