JPH08110128A - Oil separator - Google Patents

Abstract

PURPOSE: To improve the separating efficiency of oil by attaching a strainer to the gas inlet of a gas outflow pipe, in an oil separator wherein a gaseous refrigerant swirls, misty oil in the gaseous refrigerant adheres to the side wall of a closed vessel, and the oil separates. CONSTITUTION: An oil separator has a gas outflow pipe 2 with a gas inlet 2A opening downward, at the upper part of the center of a closed vessel 1 installed vertically, misty oil contained in gaseous refrigerant in allowed to adhere to the inside wall of the closed vessel 1 and the oil is separated. In addition, a strainer 6 is attached to the gas inlet 2A of the gas outflow pipe 2. In this way, the misty lubricant contained in the gas refrigerant is partly about to be sucked in the gas outflow pipe 2 on the stream of the gas refrigerant, it adheres to the strainer 6 in a process of passing the strainer 6. Therefore, after separating from the gas refrigerant, the lubricant drops gradually at the bottom of the inside of the closed vessel 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil separator applied to an air conditioner, a refrigerating device and the like.

[0002]

2. Description of the Related Art One example of a conventional oil separator is shown in FIG.
(A) is a longitudinal sectional view, (B) is a sectional view taken along the line BB of (A). In FIG. 2, a gas outflow pipe 2 is attached vertically through a central portion of a ceiling wall of a vertically installed barrel-shaped closed container 1, and a lower end suction port 2A thereof opens downward in the central portion of the container 1. are doing.

A gas inlet pipe 3 penetrating above the side wall of the container 1.
Is installed horizontally, and its inlet is close to the inner surface 5 of the side wall of the container 1 and opens in the tangential direction thereof. Also,
An oil return pipe 4 is connected to the peripheral portion of the bottom wall of the container 1.

In this oil separator, when the gas refrigerant discharged from a compressor (not shown) is introduced into the closed container 1 through the gas inflow pipe 3, the gas refrigerant flows along the inner surface 5 of the side wall of the closed container 1. It descends while turning. Then, the mist-like lubricating oil contained in the gas refrigerant adheres to the side wall inner surface 5 to be separated, flows down along the side wall inner surface 5 and is stored in the inner bottom portion of the container 1.

The lubricating oil L passes through the oil return pipe 4 and the compressor 1
Return to On the other hand, the gas refrigerant from which the lubricating oil has been separated rises in the center of the container 1 and is sucked into the gas outflow pipe 2 through the lower end suction port 2A thereof, and flows through a condenser, a throttle, an evaporator and the like (not shown) to move to the compressor. Return to.

[0006]

In the conventional oil separator described above, a part of the mist-like lubricating oil contained in the gas refrigerant flows along with the flow of the gas refrigerant sucked into the gas outflow pipe 2. Since the gas flows out from the gas outflow pipe 2, there is a problem that the oil separation efficiency decreases.

[0007]

The present invention has been invented in order to solve the above-mentioned problems, and the gist of the invention is that a vertically installed closed container is placed downward in the upper central part. A gas outlet tube having an open gas inlet,
In an oil separator for separating the mist-like oil contained in the gas refrigerant by swirling the gas refrigerant introduced into the airtight container on the inner surface of the side wall of the airtight container, the gas suction of the gas outflow pipe The oil separator has a strainer attached to the mouth.

The strainer may have a mesh of 20 and / or 100 mesh, and a flow area such that the gas flow rate through the strainer is 0.4 m / Sec or less.

[0009]

In the present invention, because of the above-described structure, the mist-like oil that is about to be sucked together with the flow of the gas refrigerant sucked into the gas outflow pipe adheres to the strainer and is separated and removed. It

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIG. 1, where (A) is a longitudinal sectional view and (B) is a sectional view taken along the line BB of (A). As shown in Fig. 1 (A), the gas inlet at the lower end of the gas outflow pipe 2
A strainer 6 is attached to 2A. Other configurations are similar to those of the conventional one shown in FIG. 2, and corresponding members are designated by the same reference numerals.

However, a part of the mist-like lubricating oil contained in the gas refrigerant rides on the flow of the gas refrigerant and the gas outflow pipe 2
However, after being separated from the gas refrigerant by adhering to the strainer 6 in the process of flowing through the strainer 6, the strainer 6 gradually drops from the strainer 6 to the inner bottom of the closed container 1.

[0012] If the mesh of the strainer 6 is made too fine, the oil will form a film and there will be many portions that block the mesh, and conversely the oil separation efficiency will decrease. Also, strainer 6
If the gas flow area is too small, the flow velocity of the gas flowing through the strainer 6 increases and the oil adhering to the strainer 6 is sucked up, resulting in poor oil separation efficiency.

Therefore, the strainer 6 sets the mesh to 20.
It was confirmed by experiments that good oil separation efficiency can be obtained by setting the mesh flow rate to 100 to 100 mesh and setting the gas flow area so that the gas flow rate through the strainer 6 is 0.4 m / sec or less.

[0014]

According to the present invention, the mist-like oil, which tends to be sucked along with the flow of the gas refrigerant sucked into the gas outflow pipe, adheres to the strainer attached to the gas suction port of the gas outflow pipe. The oil is separated and removed in this manner, so that the oil separation efficiency can be improved.

Strainer mesh 20 and or 100
Use a mesh and set the gas flow rate through the strainer.
By setting the flow area to 0.4 m / sec or less, the oil separation efficiency can be favorably maintained.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, (A) is a longitudinal sectional view,
(B) is a sectional view taken along the line BB of (A).

FIG. 2 shows a conventional oil separator, (A) is a longitudinal sectional view, (B)
FIG. 7A is a sectional view taken along the line BB of FIG.

[Explanation of symbols]

 1 Airtight container 2 Gas outflow pipe 2A Gas suction port 3 Gas inflow pipe 4 Oil return pipe 5 Side wall inner surface L Lubricating oil

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[Procedure amendment]

[Submission date] November 25, 1994

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

FIG.

[Fig. 2]

Claims (2)

[Claims] 1. A gas outlet pipe having a gas inlet opening downward at the center upper part in a vertically installed closed container,
In an oil separator that separates the mist-like oil contained in the gas refrigerant by swirling the gas refrigerant introduced into the closed container by adhering it to the inner surface of the side wall of the closed container, the gas suction of the gas outflow pipe. An oil separator with a strainer attached to the mouth. 2. The oil according to claim 1, wherein the strainer has a mesh of 20 and / or 100 mesh and a flow area of a gas flowing through the strainer of 0.4 m / sec or less. Separator.