JPH0428974A - Accumulator for freezer - Google Patents

Abstract

PURPOSE:To restrict separation of lubricating oil and liquid refrigerant in two phases and gathering of the lubricating oil on the surface of the liquid refrigerant in an accumulator by a method wherein a partition tube consisting of a tube having a little smaller diameter than an inner diameter of a container is arranged and fixed in the container of the accumulator with a space from an inner wall and an inner bottom part of the container. CONSTITUTION:Mixed liquid 5 of lubricating oil and liquid refrigerant to be accumulated in a container 1 of an accumulator is made constantly to flow into the container 1 from the lower side by the effect of a partition tube 6. As a result, if the mixed liquid 5 is going to be separated in two phases, the lubricating oil is diffused into the liquid refrigerant and thereby the lubricating oil is made to exist in the vicinity of an introduction hole 4. Accordingly, oil return to a compressor is improved, whereby burning accident and the like of the compressor can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for returning lubricating oil in a liquid refrigerant to a compressor in an accumulator for a refrigeration system.

[Conventional technology]

The conventional device in the accumulator for refrigeration equipment is the fifth
As shown in FIG. FIG. 5 is a front view, and FIG. 6 is a side view. 1 is a sealed container, 2 is an evaporator (not shown)
3 is an introduction pipe that guides the refrigerant from the container 1 into the outlet pipe 3; 3 is an outlet pipe that returns the refrigerant in the container 1 to the suction side of the compressor (not shown); 4 is an introduction pipe that guides the gas refrigerant in the container 1 into the outlet pipe 3 The hole 44 is an introduction hole for guiding the mixed liquid 5 of lubricating oil and liquid refrigerant accumulated inside the container into the outlet pipe 3.

The gas refrigerant containing lubricating oil and liquid refrigerant from the evaporator enters the container 1 through the introduction pipe 2, and after being separated into gas and liquid, the gas refrigerant is sucked through the introduction holes 4 and 444,
It returns to the suction side of the compressor through the outlet pipe 3, while the mixed liquid accumulates in the container 1. The accumulated liquid mixture 5 is guided into the outlet pipe 3 through the introduction hole 44 and returned to the compressor together with the gas refrigerant.

That is, the lubricating oil accumulated in the container 1 is returned to the compressor.

[Problem to be solved by the invention]

In the above conventional technology, when the lubricating oil collects on the liquid surface of the liquid refrigerant in the liquid mixture 5 accumulated in the container of the accumulator, that is, when two phases separate, depending on the position of the liquid mixture, Oil return to the compressor becomes extremely poor.

In other words, there was a problem in that the introduction hole 4 was in the liquid refrigerant, making it difficult to suck in the lubricating oil.

An object of the present invention is to suppress the two-phase separation of lubricating oil and liquid refrigerant in the container of an accumulator and the lubricating oil from collecting on the liquid surface of the liquid refrigerant.

[Means to solve the problem]

In order to achieve the above object, the present invention installs and fixes a tubular partition tube, which is slightly smaller than the inner diameter of the container, inside the container of an accumulator for a refrigeration device while leaving a gap between the inner wall and the inner bottom of the container. It is.

[Effect]

In the accumulator according to the present invention, the gas refrigerant that has flowed into the container is separated into gas and liquid within the container.

The liquefied mixture of refrigerant and lubricating oil flows into the gap between the inner wall of the container and the partition tube, passes through the lower end of the partition tube, and accumulates on the inner surface of the partition tube. As a result, the mixed liquid always flows into the inner surface of the partition tube from below, so that even if the two phases are separated, the lubricating oil is easily diffused into the mixed liquid. On the other hand, in an accumulator with an ejector installed in the middle of the introduction pipe, the liquid refrigerant accumulated in the container is sucked up by the ejector and mixed with the gas refrigerant from the evaporator in the evaporator pipe.
flows into the container. As a result, even if the mixed liquid of lubricating oil and liquid refrigerant accumulated in the container separates into two phases, the lubricating oil is diffused into the mixed liquid, and the concentration distribution of the lubricating oil tends to be uniform.

〔Example〕

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

FIG. 1 is a front view, and FIG. 2 is a side view. 1 is a sealed container, 2 is an introduction pipe that introduces refrigerant from the evaporator into container 1, 3 is an outlet pipe that returns the refrigerant in container 1 to the suction side of the compressor, and 4 is a gas refrigerant in container 1. a hole 4 for guiding the material into the outlet pipe 3;
Reference numeral 4 denotes an introduction hole for guiding a mixture 5 of lubricating oil and liquid refrigerant accumulated inside the container into the outlet pipe 3; 6 has a slight clearance with the inner wall of the container 1 and also has a clearance with the bottom of the container 1; The tubular partition tube 7 is fixed with a leg for fixing the partition tube 6 and the container 1. The gas refrigerant containing the lubricating oil and liquid refrigerant from the evaporator passes through the introduction pipe 2 into the container 1 and is separated into gas and liquid, after which the gas refrigerant passes through the output pipe 3 and returns to the suction side of the compressor. On the other hand, the mixture of lubricating oil and liquid refrigerant is in container 1.
flows into the gap between the inner wall of the partition pipe 6 and the partition pipe 6.
and the bottom of the container 1 and accumulate inside the partition tube 6. 5 is the accumulated liquid mixture.

According to this embodiment, the mixed liquid of lubricating oil and liquid refrigerant accumulated in the container 1 of the accumulator always flows from the lower side of the container 1 due to the action of the partition pipe 6. Therefore, even if the mixed liquid 5 is in a state where two phases are separated, the lubricating oil is diffused into the liquid refrigerant, and the lubricating oil can be present near the introduction hole 4.

That is, the return of oil to the compressor is improved, and accidents such as burnout of the compressor can be prevented.

3 and 4 show other embodiments of the present invention, with FIG. 3 being a front view and FIG. 4 being a side view. Figure 1.

The difference from Fig. 2 is that an ejector 8 is installed in the middle of the introduction pipe 2.
It is equipped with a suction pipe 9 for the same.

The gas refrigerant from the evaporator flows into the container 1 through the introduction pipe 2, and at this time, the mixed liquid 5 sucked up by the ejector is guided into the introduction pipe 2 through the suction pipe 9. Thereafter, it is mixed with the gas refrigerant and flows into the container 1. As a result, the liquid mixture 5 accumulated in the container 1 is more efficiently diffused.

〔Effect of the invention〕

According to the present invention, even if the lubricating oil and the liquid refrigerant in the container separate into two phases, the oil can be returned to the compressor well, thereby preventing burnout of the compressor due to lack of lubricating oil.

[Brief Description of the Drawings] Fig. 1 and Fig. 2 are longitudinal sectional views of an accumulator for a refrigeration system according to an embodiment of the present invention, in which Fig. 1 is a front view, Fig. 2 is a side view, and Fig. 3 , FIG. 4 is a vertical cross-sectional view of another embodiment of the present invention, FIG. 3 is a front view, FIG. 4 is a side view, and FIGS. 5 and 6 are vertical cross-sections showing a conventional accumulator for a refrigeration system. In the figure,
FIG. 5 is a front view, and FIG. 6 is a side view. 1... Container, 2... Inlet pipe, 3... Outlet pipe, 5...
・・Mixture of lubricating oil and liquid refrigerant, 6・Partition pipe, 8・
...Ejector, 9...Suction pipe, 44...Introduction hole.

Claims (1)

[Claims] 1. An accumulator for a refrigeration system comprising a sealed container, an inlet pipe for introducing refrigerant from an evaporator into the container, and an outlet pipe for returning the refrigerant in the container to the suction side of a compressor, wherein: An accumulator for a refrigeration system, characterized in that a tubular partition pipe having a diameter slightly smaller than the inner diameter of the container is installed and fixed to the inner wall of the container and the inner bottom of the container while leaving a gap therebetween.