JPS6179964A - Vapor-liquid separator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an oil return device for a gas-liquid separator.

Conventional Structure and Problems Conventionally, this type of oil return device has a structure in which an oil return hole is provided at the bottom of the refrigerant outlet pipe, and the liquid refrigerant and refrigerating machine oil are sucked through the oil return hole and collected into the compressor. Are known.

However, with this configuration, there are problems such as liquid refrigerant being sucked into the compressor ring, which increases the noise and vibration of the compressor, or causes the crankshaft to wear or lock. was.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to maintain the reliability of the compressor at the same temperature when refrigerating machine oil is returned to the compressor.

Structure of the Invention In order to achieve this object, the present invention provides an oil filtration and recovery tool that connects the other end of the oil inlet pipe, which is provided in the refrigerant outlet pipe so as to be freely slidable in the vertical direction, to the refrigerant outlet pipe. The filtration recovery device is configured to be in constant contact with the refrigerating machine oil surface.

This configuration makes it possible to collect only the refrigerating machine oil into the compressor.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, the outline of the refrigeration cycle of the air conditioner will be explained with reference to FIG.

In the figure, 1 is a gas-liquid separator, 12 is an outdoor heat exchanger, 13 is a compressor, 14 is an indoor heat exchanger, 15 is a capillary tube, 16 is a four-way valve, and the solid arrow line indicates when cooling, The broken lines indicate the flow of refrigerant during heating.

Next, the configuration of the gas-liquid separator 1 will be explained with reference to FIG.

In the figure, 1 is a gas-liquid separator body, inside of which is a refrigerant inlet pipe 2 that communicates with the four-way valve 16, and a compressor 3.
A refrigerant outlet pipe 3 communicating with, a refrigerator oil level 4, a refrigerant liquid level 5,
It consists of an oil filtration recovery tool 6 and an oil return pipe 7 communicating it with the refrigerant outlet pipe 3.

Further, as shown in FIG. 2, the oil filtration and recovery tool 6 is configured such that the oil filtration and recovery tool 6 can be slid downwardly into the mesh strainer 8, the expanded portion 9, the oil return hole 10, and the refrigerant outlet pipe 3. A holding portion 11 is formed.

When the air conditioner is operated with the above configuration, the refrigerating machine oil 4, which was initially in the compressor, jumps out into the refrigeration cycle together with the refrigerant, and then returns to the gas-liquid separator body 1, together with the liquid cooling medium 5. Accumulates inside. At this time, since the refrigerating machine oil 4 has a smaller specific gravity than the liquid refrigerant 5, the entire refrigerating machine oil surface is formed in a part of the liquid refrigerant 5.

At this time, the oil filtration and recovery tool 6 slides northward due to its buoyancy and is located on the refrigerating machine oil level 4.

Then, since suction pressure is acting on the refrigerant outlet pipe 3, the refrigerating machine oil 4 is sucked up from the oil return hole 1o through the widened part 9 equipped with the mesh strainer 8, and passes through the refrigerant outlet pipe 3 from the oil return pipe 7. and is sucked into the compressor 3 together with the vaporized refrigerant.

Therefore, since there is no oil return hole in the liquid refrigerant unlike in the prior art, very high reliability of the compressor can be obtained without the compressor compressing the liquid.

Effects of the Invention As described below, the present invention provides an oil filtration recovery tool that can slide freely in the vertical direction so that it is always in contact with the refrigerating machine oil surface, collects only the refrigerating machine oil into the compressor, and prevents liquid refrigerant from penetrating into the compressor. Since this is reduced as much as possible, it has the effect of improving the operational reliability of the compressor.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main body of a gas-liquid separator equipped with an oil filtration and recovery device according to an embodiment of the present invention, Fig. 2 is an enlarged view of the main parts of the oil filtration and recovery device, and Fig. 3 is a refrigeration cycle diagram. be. 1... Gas-liquid separator main body, 2... Refrigerant inlet pipe, 3... Refrigerant outlet pipe, 4... Refrigerating machine oil, 5... ... Refrigerant liquid level, 6... Oil U,
l Excess recovery tool, 7...Oil return pipe, 8...
Mesh strainer, 9... Expansion part, 1o...
...Oil return hole, 11...Holding part. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
figure

Claims (1)

[Claims] A gas-liquid separator main body into which refrigerant is introduced from the evaporator, a refrigerant outlet pipe provided in this container and connected to a compressor at one end and below the refrigerant liquid surface of the gas-liquid separator main body, and this refrigerant. The oil filtration and recovery tool is provided with an oil return pipe that is freely slidable in the vertical direction by a holding part on the outlet pipe, and communicates the other end of the oil return pipe with the refrigerant outlet pipe. A gas-liquid separator with a communicating oil return hole covered by a mesh strainer.