JPH0731098Y2 - Oil separator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an improvement of an oil separator used in an air conditioner or a refrigerator.

[Conventional technology]

A conventional oil separator of this type is shown in FIG.
In the figure, (1) is an upper shell (1a) and a lower shell (1b)
A shell whose inside is sealed by butting with each other, (2) is an inlet pipe having a mesh body (3) at the tip, (4) is an outlet pipe having a mesh body (5) at the tip, and (6) is a mesh body (3) The partition plate fixed to the (7) is an oil drain pipe provided at the bottom of the lower shell (1b).

Next, the operation will be described. The refrigerant gas discharged from the compressor is introduced into the shell (1) via the inlet pipe (2) and the mesh body (3), and the introduced gas is discharged through the mesh body (5) to the outlet pipe (4). To discharge. When the refrigerant gas comes into contact with the mesh bodies (3) and (5), the refrigerating machine oil mixed in the refrigerant gas is separated, and the separated oil drops to the bottom of the shell (1), and the drain pipe (7). ) To return oil to the compressor. The partition plate (6) prevents the oil captured by the mesh body (3) from scattering to the mesh body (5) on the outlet pipe (4) side.

[Problems to be solved by the device]

As described above, in the conventional oil separator, since the inlet pipe (2) and the outlet pipe (4) are arranged on the left and right, the refrigerant gas flow inside the shell (1) is relatively disturbed. Therefore, a part of the oil caught and dropped by the mesh body (3) on the inlet pipe (2) side is rolled up, and the oil adheres to the mesh body (5) on the outlet pipe (4) side,
As a result, there was a problem that the separation efficiency of refrigerating machine oil deteriorates. In particular, when the oil content in the inflowing refrigerant gas is high, the entire mesh body (3) on the inlet pipe (2) side is filled with oil droplets, so that the gas flow connection passing through the mesh body (3). Becomes non-uniform, the turbulence of the refrigerant gas flow inside the shell (1) is increased, and the amount of oil wound up to the outlet pipe (4) side increases, so that the separation efficiency of refrigerating machine oil is extremely deteriorated. In order to solve such a problem, it is conceivable to increase the inner diameter of the shell (1) or increase the area of the mesh body (3), but all of them have a problem that the manufacturing cost is high.

The present invention has been made to solve such a problem, and an object thereof is to provide an oil separator having high separation efficiency even when a refrigerant gas having a high oil content flows in.

[Means for Solving the Problems]

The oil separator according to the present invention includes a closed shell having a circular body, a plurality of small holes or notches mounted on the outer circumference of the closed shell, and an upper space and a lower portion of the closed shell. A circular plate that divides into a space, a first inlet pipe that introduces a refrigerant gas from the outside of the closed shell into the upper space that divides the circular plate, and a first plate that is provided at the center of the circular plate A second inlet pipe for introducing the refrigerant gas introduced into the inlet pipe into the lower space of the closed shell;
A net-like member attached to the end portion of the second inlet pipe on the lower space side, an outlet pipe for leading the refrigerant gas introduced into the lower space of the closed shell to the outside of the closed shell,
An oil separator characterized by being equipped with.

[Action]

According to the oil separator of the present invention, the refrigerant gas containing the refrigerating machine oil is introduced into the upper space in the closed shell from the first inlet pipe, and most of the refrigerating machine oil collides with the inner wall of the upper space. After being attached and separated, it flows down along the inner wall of the lower space through the small holes or notches in the outer periphery of the circular plate and is stored in the bottom of the closed shell, while the remaining refrigeration oil in the upper space is the refrigerant. Gathered in the central part of the upper space while being contained in the gas,
After passing through the second inlet pipe, they are attached / separated by a mesh body, fall, and are stored at the bottom of the closed shell.

〔Example〕

An embodiment according to the present invention will be described below with reference to FIGS. 1 and 2.

In the figure, (1) is a closed shell having a circular body composed of an upper shell (1a) and a lower shell (1b), and (2) is a first inlet for introducing a refrigerant gas into the closed shell (1). The pipe, (8) is a circular plate having a plurality of cutouts on the outer periphery thereof, and the circular plate (8) is attached from the top of the shell (1) to a position of 1/3 to 1/4 of the total height of the shell (1). Has been. (9) is an upper space of the circular plate (8), and (10) is a lower space. Reference numeral (11) is a second inlet pipe having a mesh body (12) at its tip, and introduces the refrigerant gas in the upper space (9) into the lower space (10). (4) is an outlet pipe having an end in the lower space (10), and (7) is an oil drain pipe.

In the oil separator having the above-mentioned structure, refrigerating machine oil mixed in the refrigerant gas discharged from the compressor collides with the circular plate (8) and the inner wall of the shell (1) in the upper space (9) and is separated. The oil drops into the lower space (10) through the notch provided in the outer peripheral portion of the circular plate (8). Further, the refrigerant gas containing some refrigerating machine oil collides with the reticulate body (12) through the second inlet pipe (11), so that the refrigerating machine oil adheres to the reticulate body (12) and becomes droplets. When it becomes, it falls to the bottom of the shell (1). In this way, the refrigerant gas in which the refrigerating machine oil is almost separated in the circular plate (8) part and the mesh body (12) part is
It flows out of the oil separator via the outlet pipe (4). Further, most of the refrigerating machine oil contained in the refrigerant gas flowing in through the first inlet pipe (2) is collected in the upper space (9), so that the amount of oil adhering to the mesh body (12) is increased. Is relatively few. Therefore, the velocity of the gas flowing out from the mesh body (12) is uniform, and the downward flow is formed through the notch in the outer circumference of the circular plate (8), so that the oil winding phenomenon can be prevented.

In this embodiment, the outlet pipe (4) penetrates the circular plate (8) and is taken out to the upper part of the shell (1), but it may be taken out from the side face of the shell (1). In this embodiment, a plurality of cutouts are provided on the outer peripheral portion of the circular plate (8), but the same effect can be obtained by providing a plurality of small holes on the outer peripheral portion of the circular plate. Further, as shown in FIG. 1, the outlet portion of the first inlet pipe (2) on the upper space (9) side is arranged so as to be substantially parallel to the circular body of the shell (1), and the freezing is performed. By giving a swirling force to the refrigerant gas containing the machine oil so that centrifugal force works, the refrigerant gas having a different specific gravity and the refrigerating machine oil are further separated.

[Effect of device]

As described above, the present invention has a closed shell having a circular body, and a plurality of small holes in the outer periphery of the closed shell.
Alternatively, a circular plate having a cutout is attached, and a first inlet pipe for introducing a refrigerant gas into the upper space of the circular plate and a second inlet pipe for introducing a refrigerant gas from the upper space of the circular plate into the lower space. An oil separator is provided because a net-like member is attached to the end of the second inlet pipe located in the lower space of the circular plate and an outlet pipe for discharging the refrigerant gas from the lower space of the circular plate to the outside of the shell is provided. Most of the refrigerating machine oil contained in the refrigerant gas that has flowed in is collected in the upper space of the circular plate, falls through the small holes or notches in the outer periphery of the circular plate, and cannot be collected in the upper space. Refrigerator oil in mist form is the second
Since it is collected by the net-like body provided at the end of the inlet pipe, the separation efficiency of the oil separator can be remarkably increased. Further, the flow velocity of the gas flowing out from the mesh is relatively stable, and the downward flow is formed through the small hole or the notch in the outer peripheral portion of the circular plate, so that the oil having the relatively small diameter can be used. It is possible to suppress the hoisting phenomenon, and to obtain an oil separator with low cost and high separation efficiency.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an oil separator according to an embodiment of the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is a vertical sectional view of a conventional oil separator. In the figure, (1) is a closed shell, (2) is a first inlet pipe,
(4) is an outlet pipe, (8) is a circular plate, (9) is an upper space,
(10) is a lower space, (11) is a second inlet pipe, and (12) is a mesh. In each figure, the same reference numerals indicate the same or corresponding parts.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Naoki Tanaka 8-1-1 Tsukaguchi Honcho, Amagasaki City, Hyogo Prefecture Sanryo Electric Co., Ltd. Central Research Institute (72) Inventor Iijima 8-chome, Tsukaguchi Honmachi, Amagasaki City, Hyogo Prefecture No. 1 Sanritsu Denki Co., Ltd. Central Research Laboratory (56) References Shown 59-191569 (JP, U) Shown 62-198466 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A hermetic shell having a circular body and a plurality of small holes or notches mounted on the outer periphery of the hermetic shell, and the hermetic shell is divided into an upper space and a lower space. A circular plate, a first inlet pipe for introducing a refrigerant gas from the outside of the closed shell into the upper space defined by the circular plate, and a first inlet pipe provided at the center of the circular plate for introducing the first inlet pipe. A second inlet pipe for introducing the refrigerant gas into the lower space of the closed shell, and a mesh body attached to an end of the second inlet pipe on the lower space side,
An outlet pipe for leading the refrigerant gas introduced into the lower space of the closed shell to the outside of the closed shell.