JPH05164433A - Freezing cycle accumulator - Google Patents

Abstract

PURPOSE:To prevent a compressor from being damaged with a liquid backing even if a large amount of refrigerant liquid is returned back from an evaporator by a method wherein liquid refrigerant fed together with evaporated and gasified gaseous refrigerant is returned back to the compressor and an outer circumferential surface of a container is provided with some heat absorption fins for absorbing head from a heat source. CONSTITUTION:Gas fed out of an evaporator and refrigerant partially in a liquid state are flowed from a flowing-in pipe 2 into a container 1, its gas and liquid are separated, refrigerant liquid 5 is accumulated at a lower part within the container 1 and gaseous refrigerant 6 is accumulated at an upper part within the container 1. The refrigerant liquid 5 is heated by heat absorbed from a heat source, for example, surrounding air by heat absorbing fins 8 through the container 1, evaporated and gasified to become gaseous refrigerant, sucked into a flowing-out pipe 3 together with gaseous refrigerant accumulated at the upper part and then returned back to the compressor. In addition, oil in the refrigerant liquid 5 is accumulated at the lower part of the container 1, gradually sucked into an oil returning port 4 and returned back to the compressor through the flowing-out pipe 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a refrigerating cycle accumulator arranged between an evaporator and a compressor of a refrigerating cycle.

[0002]

2. Description of the Related Art FIG. 5 is a sectional view showing an accumulator for a conventional refrigeration cycle disclosed in, for example, Japanese Patent Laid-Open No. 58-64472, in which 1 is a sealed container and 2 is an evaporator (not shown). Inlet pipe for introducing the refrigerant discharged from the container 1 into the container 1, 3 is an outlet pipe for returning the refrigerant in the container 1 to a compressor (not shown), and 4 is an oil provided in the curved pipe portion of the outlet pipe 3. Return hole, 5
Is a refrigerant liquid, 6 is a gas refrigerant, 7 is a container 1, an inflow pipe 2,
It is an accumulator for a refrigeration cycle configured with an outflow pipe 3.

Next, the operation will be described. The refrigerant that has exchanged heat with the evaporator (not shown) is partially in a liquid state with the gas and enters the inflow pipe 2
As a result, the refrigerant liquid 5 is collected in the lower part of the container 1 and the gas refrigerant 6 is collected in the upper part of the container 1 by gas-liquid separation.
Then, a part of the refrigerant liquid 5 is evaporated and vaporized by the heat exchange with the heat source body composed of ambient air through the container 1 to become a gas refrigerant,
It is sucked into the outflow pipe 3 together with the gas refrigerant flowing in and accumulated in the upper part, and returned to the compressor (not shown). The oil contained in the refrigerant liquid 5 is sucked into the outflow pipe 3 through the oil return hole 4,
It is returned to the compressor via the outflow pipe 3.

[0004]

Since the conventional refrigeration cycle accumulator is constructed as described above,
When there is a large amount of refrigerant liquid return from the evaporator, the heat exchange area with the outside air of the container is small, so the refrigerant liquid is not evaporated and vaporized and returns to the compressor from the outflow pipe, causing liquid compression and damaging the compressor. There were problems such as.

The present invention has been made in order to solve the above problems, and provides an accumulator for a refrigeration cycle which can completely vaporize the refrigerant returned to the compressor even if a large amount of refrigerant liquid returns from the evaporator. The purpose is to get.

[0006]

The refrigerating cycle accumulator according to the present invention has a heat absorbing fin provided on the outer peripheral surface of the container.

[0007]

In the refrigerating cycle accumulator according to the present invention, heat is absorbed from the heat source such as the surrounding air by the heat absorbing fins, and the heat causes the refrigerant liquid to be completely vaporized.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A cross-sectional view and a perspective view of a refrigeration cycle accumulator according to an embodiment of the present invention shown in FIGS. 1 and 2 will be described below. In these figures, the difference from FIG. 5 is that a plurality of flat ring-shaped heat absorbing fins are fixed to the outer peripheral surface of the container 1 by welding or the like.

Next, the operation will be described. The gas discharged from the evaporator (not shown) and the refrigerant in a partially liquid state flow into the container 1 through the inflow pipe 2 and are separated into gas and liquid, and the refrigerant liquid 5 is in the lower portion of the container 1 and the gas refrigerant. 6 collects in the upper part of the container 1. Then, the refrigerant liquid 5 is absorbed by the heat absorbing fins 8 from the heat source (for example, ambient air), and is heated through the container 1 to be evaporated and vaporized into a gas refrigerant, which is sucked into the outflow pipe 3 together with the gas refrigerant which has flowed in and accumulated in the upper portion. Rarely returned to the compressor (not shown). Also, the oil in the refrigerant liquid 5 collects in the lower part of the container 1,
It is gradually sucked into the oil return hole 4 and returned to the compressor through the outflow pipe 3.

Although the flat ring-shaped heat absorbing fins 8 are fixed to the outer peripheral surface of the container 1 in the above-mentioned embodiment, the present invention is not limited to this, and the container is, for example, as shown in FIGS. 3 and 4. Skirt-shaped or spiral endothermic fins 8a, 8b may be fixed to the outer peripheral surface of 1. In this case, the condensed water adhering to the surface of the endothermic fins 8a, 8b naturally falls,
The decrease in heat transfer due to water is prevented, and the evaporation and vaporization of the refrigerant liquid 5 accumulated in the lower portion of the container 1 is further promoted. Further, the endothermic fins may be integrally provided on the outer peripheral surface of the container 1 without being fixed to the outer peripheral surface of the container 1, and the same effects as those of the above-described embodiment can be obtained.

[0011]

As described above, according to the present invention, the heat absorbing fins are provided on the outer peripheral surface of the container, and the heat is absorbed from the heat source to heat the refrigerant liquid in the container through the container.
Even if a large amount of refrigerant liquid returns from the evaporator, it is completely evaporated and vaporized, and damage to the compressor due to the liquid bag is prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of an accumulator for a refrigeration cycle according to an embodiment of the present invention.

FIG. 2 is a perspective view of an accumulator for a refrigeration cycle according to an embodiment of the present invention.

FIG. 3 is a sectional view of a refrigeration cycle accumulator according to another embodiment of the present invention.

FIG. 4 is a perspective view of an accumulator for a refrigeration cycle according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a conventional refrigeration cycle accumulator.

[Explanation of symbols]

 1 Container 2 Inflow Pipe 3 Outflow Pipe 5 Refrigerant Liquid 6 Gas Refrigerant 7 Accumulator for Refrigeration Cycle 8 Endothermic Fin

Claims (1)

[Claims] 1. A gas evaporated and vaporized by introducing a gas discharged from an evaporator and a partially liquid-state refrigerant into a closed container and exchanging heat between the heat source and the introduced refrigerant liquid through the container. An accumulator for a refrigeration cycle, characterized in that the introduced gas refrigerant is returned to a compressor together with a refrigerant, and an endothermic fin for absorbing heat from the heat source is provided on an outer peripheral surface of the container.