JPH08271094A - Accumulator - Google Patents

Abstract

PURPOSE: To prevent damages of valves, etc., in a compressor due to liquid compression by completely vaporizing refrigerant before it is sucked by the compressor. CONSTITUTION: An accumulator consists of an almost cylindrical vessel 11 having almost conical top and bottom, a discharge pipe 12 that extends downward from the top and a suction pipe 13 that extends upward from the bottom. An open end 13a of the suction pipe 13 is located higher than an open end 12a of the discharge pipe 12. The suction pipe 13 is connected to a compressor and the discharge pipe 12 is connected to a cooler.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulator for returning vaporized refrigerant to a compressor.

[0002]

2. Description of the Prior Art As a conventional accumulator,
What is disclosed in Japanese Patent Publication No. 2-30703 is known.

The accumulator of the above conventional example will be described below with reference to FIGS. 6 and 7.

A refrigerating cycle of a refrigerator using an accumulator of a conventional example will be described with reference to FIG. Reference numeral 1 is a compressor for making the refrigerant high temperature and high pressure, 2 is a condenser for radiating the high temperature and high pressure refrigerant, and 3 is a decompressor for decompressing the refrigerant having passed through the condenser 2. Reference numeral 4 denotes a cooler that expands and cools the refrigerant that has passed through the decompressor 3. Reference numeral 5 denotes an accumulator that prevents the refrigerant from returning to the compressor 1 in a liquid state, and is installed between the cooler 4 and the compressor 1. ing.

The accumulator 5 is connected to the container 6 and the cooler 4, and has a discharge pipe 7 located on the upper surface of the container 6,
There is a suction pipe 8 that returns the refrigerant inside the container 6 to the compressor 1.
The refrigerant is discharged into the container 6 through the discharge pipe opening 7a, and the refrigerant is sucked into the compressor 1 through the suction pipe opening 8a through the suction pipe 8. Reference numeral 9 is a heat exchange pipe mounted so as to exchange heat with the compressor 1, and both the inlet side 9a of the heat exchange pipe 9 and the outlet side 9b of the heat exchange pipe 9 vaporize the refrigerant inside the container 6.

Accumulator 5 constructed as described above
The operation will be described below. The liquid refrigerant led out from the evaporator 4 passes through the discharge pipe 7 and temporarily accumulates inside the container 6. However, the compressor 1 provided on the side surface of the accumulator 5
By providing the heat exchange pipe 9 for exchanging heat with the compressor 1, the liquid refrigerant accumulated in the container 6 is vaporized, and the suction pipe 8 is used to discharge the liquid refrigerant.
Return to. At this time, the height of the suction pipe 8 is equal to that of the heat exchange pipe 9.
Installed higher than the inlet side 9a of the evaporator 4
The liquid refrigerant thus derived is prevented from directly entering the suction pipe 8 and returning to the compressor 1. In this way, measures have been taken to prevent liquid compression.

[0007]

However, in the above-mentioned conventional structure, when the compressor is started, the liquid refrigerant inside the cooler directly passes through the discharge pipe inside the accumulator when the compressor is suddenly sucked. Since it is sucked into the suction pipe, heat exchange by the compressor cannot be performed, and the completely vaporized refrigerant cannot be sucked into the compressor,
Since liquid compression occurs, the valves inside the compressor are damaged and the reliability is extremely low.

The present invention solves the above-mentioned conventional problems, and an object of the present invention is to improve the reliability of a compressor without causing liquid compression when the compressor is started.

[0009]

In order to achieve this object, an accumulator according to a first aspect of the present invention has a structure in which the suction pipe opening is located above the discharge pipe opening.

Further, the invention according to claim 2 has a construction in which a partition plate is attached between the discharge pipe and the suction pipe in the accumulator, and the partition plate is provided with a hole for circulating a refrigerant or the like. It is a thing.

In the invention according to claim 3, the hole is provided in the partition plate at a position off the axis connecting the discharge pipe opening and the suction pipe opening.

[0012]

In the invention according to claim 1, when the compressor is started, the refrigerant discharged from the discharge pipe into the accumulator due to the rapid suction of the compressor is sucked into the suction pipe opening located above the discharge pipe opening. Will be sucked into the club,
In the invention described in claims 2 and 3, by mounting the partition plate having the hole, the refrigerant is sucked into the suction pipe as vaporized refrigerant and returned to the compressor.

[0013]

【Example】

(Embodiment 1) Hereinafter, Embodiment 1 of the accumulator according to the present invention will be described with reference to FIGS. In the figure, the same reference numerals as those of the conventional example indicate the same members, and detailed description thereof will be omitted.

FIG. 1 is a vertical sectional view of an accumulator according to a first embodiment of the present invention, and FIG. 2 is a perspective view of the accumulator according to the same embodiment.

In FIGS. 1 and 2, 10 is an accumulator, 11 is a container, 12 is a discharge pipe connected to the cooler 4, 12a is a discharge pipe opening, from which the refrigerant is stored in the container 11
It is released inside. Reference numeral 13 is a suction pipe for returning the refrigerant inside the container 11 to the compressor 1, and reference numeral 13a is a suction pipe opening portion through which the refrigerant is sucked into the compressor 1. The discharge pipe 12 and the suction pipe 13 inserted into the container 11 are offset from each other so that the refrigerant is not short-circuited, and the discharge pipe opening 12a is installed at a position lower than the suction pipe opening 13a. Reference numeral 14 is an oil return hole for returning the refrigerating machine oil accumulated at the bottom of the container 11 to the compressor 1.

The operation of the accumulator configured as described above will be described below. Immediately after the compressor 1 is started, the liquid refrigerant accumulated inside the evaporator 4 suddenly returns to the compressor 1 due to the sudden suction of the compressor 1. At this time, the liquid refrigerant is discharged through the discharge pipe 12 inserted inside the container 11. The discharged liquid refrigerant is stored in the container 1
Ascend along the inner surface from the bottom of 1. This liquid refrigerant is
When it enters the suction pipe opening 13 a located above, it is sucked into the compressor 1. However, since the suction pipe opening 13a is located above the discharge pipe opening 12a, the liquid refrigerant having a large specific gravity is sucked into the compressor 1 through the suction pipe opening 13a in a liquid state due to gravity. Instead, it will accumulate inside the container 11. The liquid refrigerant that has temporarily accumulated immediately absorbs heat around the container 11 and is completely vaporized.

As described above, in the accumulator of this embodiment, the liquid refrigerant flowing out of the discharge pipe opening 12a has a large specific gravity in the suction pipe opening 13a located above the discharge pipe opening 12a. In that state, the refrigerant is sucked into the compressor 1 in a vaporized state having a small specific gravity, so that liquid compression does not occur and a valve etc. inside the compressor 1 may be damaged. Absent.

(Second Embodiment) Next, a second embodiment of the accumulator according to the present invention will be described with reference to FIGS. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a sectional view of an accumulator according to a second embodiment of the present invention. 3 and 4, 15 is an accumulator, 16 is a container, 17 is a discharge pipe, and 18 is a suction pipe. A partition plate 19 is attached between the discharge pipe opening 17a and the suction pipe opening 18a. Reference numeral 19a is a hole provided in the partition plate 19, and is located at a position away from the axis connecting the discharge pipe opening 17a and the suction pipe opening 18a.

The operation of the accumulator constructed as above will be described below. Release pipe opening 17a
The refrigerant that exits hits the partition plate 19. A part of the repelled liquid refrigerant is discharged into the discharge pipe opening 17a and the suction pipe opening 18
passing through a hole 19a located away from the axis connecting a,
It is sucked into the suction pipe opening 18a located below the partition plate 19.

As described above, in the accumulator of this embodiment, the liquid refrigerant flowing out from the discharge pipe opening 17a is provided with the hole 19a at a position apart from the axis connecting the discharge pipe opening 17a and the suction pipe opening 18a. Therefore, the holes cannot be directly passed through the holes 19a, most of them stay in the upper part of the partition plate 19, and the surrounding heat is absorbed and vaporized. Hole 19a
A part of the liquid refrigerant that has passed through absorbs heat while being sucked into the suction pipe opening portion 18a, the liquid refrigerant decreases, and at the time of being sucked into the suction pipe opening portion 18a with a squeezed tip, almost no refrigerant is discharged. It will vaporize. Therefore, since the refrigerant is taken into the compressor 1 in a completely vaporized state,
Liquid compression does not occur, and the valves and the like inside the compressor 1 are not damaged.

[0022]

As described above, in the accumulator of the invention according to claim 1, since the suction pipe opening for sucking into the compressor side is located above the discharge pipe opening for discharging inside the accumulator, Liquid refrigerant having a large specific gravity due to gravity is hardly sucked into the opening of the suction pipe in a liquid state.

Therefore, the liquid refrigerant discharged into the accumulator when the compressor is restarted becomes a completely vaporized refrigerant immediately before returning to the compressor and is sucked, so that the valve inside the compressor is damaged by the liquid compression. Never.

Further, in the accumulator of the invention according to claims 2 and 3, the partition plate is provided between the discharge pipe and the suction pipe, so that the liquid refrigerant discharged from the discharge pipe opening is almost shut off and vaporized. Then, because some of the liquid refrigerant will pass through the holes provided in the partition plate, the liquid refrigerant decreases by absorbing the heat of the surroundings, and almost vaporizes at the time of being sucked into the suction pipe, The same effect can be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an accumulator according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the same appearance.

FIG. 3 is a vertical sectional view of an accumulator according to a second embodiment of the present invention.

FIG. 4 is a perspective view of the partition plate.

FIG. 5 is a refrigeration cycle diagram of a refrigerator equipped with an accumulator according to the present invention.

FIG. 6 is a vertical sectional view of a conventional accumulator.

FIG. 7 is a refrigeration cycle diagram of a refrigerator equipped with the accumulator.

[Explanation of symbols]

 10,15 Accumulator 11,16 Container 12,17 Release pipe 12a, 17a Release pipe opening 13,18 Suction pipe 13a, 18a Suction pipe opening 19 Partition plate 19a Hole

Claims (3)

[Claims] 1. A substantially cylindrical container whose upper and lower ends are squeezed,
A discharge pipe extending downward from the upper end of the container and a suction pipe extending upward from the lower end of the container are provided, and the suction pipe opening is located above the discharge pipe opening. Characteristic accumulator. 2. A discharge pipe and a suction pipe are provided in a substantially cylindrical container whose upper and lower ends are narrowed, and a partition plate is provided on the inner surface of the container and between the discharge pipe opening and the suction pipe opening. And a hole for circulating a refrigerant is provided in the partition plate. 3. The accumulator according to claim 2, wherein the hole of the partition plate is provided in the partition plate at a position off the axis connecting the discharge pipe opening and the suction pipe opening.