JPH05196325A - Accumulator - Google Patents

Abstract

PURPOSE:To prevent a filter from being clogged with liquid refrigerant by a method wherein a cylindrical drum has a number of holes in the shell and the whole outer face is covered with the filter so that the filtering area. can be made larger. CONSTITUTION:A filter 4 is attached on the outer circumferential face of a cylindrical drum 51 so that it covers the whole outer surface of the drum 51. The filter 4 is attached on a filter holder 5 in the way below. The filter 4 is formed in a conical shape along the sloped outer surface of the drum 51 so as to cover the whole surface of the drum 51, and the end on the small diameter side of the filter 4 is held between a fixing part 51b and a closing part 52 to fix it. At the same time, the end on the large diameter side of the filter 4 is held between a cylindrical shell 12 and a bottom 13 when a flange part 51a of the drum 51 is attached on an accumulator main body 1. Thereby, even when a large amount of refrigerant abruptly flows into the accumulator main body 1 through an inlet pipe 2, the filter 4 is prevented from being clogged with the liquid refrigerant because the filter 4 has a large filtering area.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accumulator mainly used in parallel with a compressor.

[0002]

2. Description of the Related Art Conventionally, this type of accumulator is disclosed in, for example, Japanese Patent Laid-Open No. 2-97868, and as shown in FIG. 2, an inlet pipe B is provided above a cylindrical accumulator body A and an outlet is provided below. A baffle plate D that connects a pipe C and that has a plurality of flow holes D1 formed between the inlet pipe B and the outlet pipe C of the accumulator body A so as to traverse the body of the accumulator body A. A filter E formed by bulging upward in a hemispherical shape arranged on the upper part of the baffle plate D is arranged, and when the gas refrigerant flowing from the inlet pipe B passes through the filter E, The filter E removes foreign matters such as dust mixed in the gas refrigerant and supplies the gas refrigerant to the compressor side from the outlet pipe C. Further, the liquid refrigerant flows into the main body A together with the gas refrigerant. When the is to block the flow of the liquid refrigerant, the liquid refrigerant in the compressor is as prevented from being inhaled.

[0003]

However, in the accumulator described above, since the area of the filter E is small, the gas passage area becomes small, and when switching to the defrost operation during the heating operation, or when the operation of the compressor is started. In such a case, when a large amount of liquid refrigerant suddenly flows into the accumulator main body A from the evaporator, the entire surface of the filter E is covered with the liquid refrigerant, and the filter E becomes clogged. When the liquid refrigerant flows in, the viscosity of the oil mixed in the refrigerant becomes high, so that the clogging is severe, and due to the clogging, a large pressure difference between the primary side and the secondary side in the refrigerant flowing direction of the filter E occurs. Occurs, the secondary side is in a state close to vacuum operation, the gas refrigerant is not sufficiently supplied to the compressor, and the gas is out of operation, resulting in a cylinder in the compressor. Or reduces the effect of cooling a gas refrigerant, lubrication oil shortage occurs, resulting in a problem that seizure occurs at the sliding portion of the compressor.

The present invention has been made in view of the above problems, and an object thereof is to increase the area of the filter and the gas passage area even if a large amount of liquid refrigerant flows into the accumulator body. Accordingly, it is an object of the present invention to provide an accumulator capable of preventing clogging of the filter due to the liquid refrigerant and eliminating the problems caused by an increase in the pressure difference between the primary side and the secondary side of the filter.

[0005]

In order to achieve the above-mentioned object, the present invention comprises a closed accumulator main body 1 having a tubular body portion 12, and inside the main body 1, an inlet pipe 2 and an outlet pipe 3 are provided.
In the accumulator in which the filter 4 is attached transversely between the inlet pipe opening 21 and the outlet pipe opening 31 of the body 12, the tubular body is provided in the body 1. 12 a cylindrical portion 51 that extends obliquely inward from the opening position of the outlet pipe opening 31 on the inner wall to extend to the vicinity of the inlet pipe opening 21 and an end portion on the inlet pipe arrangement side of the cylindrical portion 51. A filter holder 5 composed of a closing portion 52 is arranged, and the holder 5 divides the accumulator body 1 into an inlet pipe arrangement side space 6 and an outlet pipe arrangement side space 7 and a front cylinder. Many holes 5 in part 51
1c is formed, and the filter 4 covering the entire surface of the tubular portion 51 is attached to the outer peripheral surface of the tubular portion 51.

[0006]

Even when a large amount of liquid refrigerant suddenly flows into the accumulator body 1 from the inlet pipe 2, the passage area of the filter 4 is increased, so that the entire surface of the filter 4 is covered with the liquid refrigerant. Is prevented, the clogging of the filter 4 due to the liquid refrigerant is prevented, and the passage of the gas refrigerant can be permitted.
Is formed by the tubular portion 51 and the closing portion 52, the liquid refrigerant flows to the lower side of the tubular portion 51, and the liquid refrigerant can be concentrated on the lower side of the accumulator main body 1. Therefore, On the upper side of the filter 4, it is possible to secure a region in which the liquid refrigerant does not stay and allows passage of the gas refrigerant. Therefore, even if a large amount of the liquid refrigerant flows into the accumulator body 1, the inlet pipe arrangement side The pressure difference between the space 6 and the space 7 on the outlet pipe side does not become large, and as a result, the sliding portion inside the compressor must not be seized.
Moreover, a sufficient amount of gas refrigerant is supplied. Furthermore, foreign matter such as dust that has flowed into the accumulator body 1 does not hinder the passage of the gas refrigerant, and thus the filter 4
Further, since the filter 4 can retain its shape by the filter holding body 5, the filter 4 can be prevented from being deformed even if it becomes clogged.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an accumulator according to the present invention will be described below with reference to FIG. In the figure, reference numeral 1 denotes an accumulator main body composed of a lid portion 11, a tubular body portion 12, and a bottom portion 13. A refrigerant inlet pipe 2 is provided at a central portion of the lid portion 11 of the main body 1.
And the refrigerant outlet pipe 3 is connected to the central portion of the bottom portion 13 so that the opening 31 at the upper end of the outlet pipe 3 is located inside the main body 1 slightly above the intermediate height. The other end opening is connected to the cylinder of the compressor.

Then, in the accumulator body 1,
A filter that divides the inside of the accumulator body 1 into an inlet pipe arrangement side space 6 and an outlet pipe arrangement side space 7 between the lower end opening 21 of the inlet pipe 2 and the opening 31 of the outlet pipe 3. 4 is provided, and the filter 4 is held by a filter holder 5 which will be described later.

More specifically, the filter holder 5 arranged in the accumulator body 1 is composed of a conical cylindrical portion 51 and a closing portion 52 for closing the small diameter opening of the cylindrical portion 51. To do. The tubular portion 51 has a conical shape that extends obliquely inward from the end portion of the tubular body portion 12 on the outlet pipe arrangement side and extends to the vicinity of the inlet pipe opening portion 21. A flange portion 51a extending outward in the radial direction is integrally formed on the peripheral edge of the diameter opening portion, and the flange portion 51a is sandwiched between the cylindrical body portion 12 and the bottom portion 13 and fixed. Further, a fixing portion 51b extending inward of the small diameter opening is formed in the small diameter opening of the tubular portion 51 on the side where the inlet pipe is disposed, and the disc-shaped opening is formed to cover and close the small diameter opening. The closing portion 52 is provided, and the closing portion 52 is formed in a dish shape having a larger diameter than the small-diameter opening portion of the tubular portion 51 and bending toward the outlet pipe 3 side. The fixed portion 51b of the tubular portion 51
It is fixed to the inlet pipe 2 and the outlet pipe 3 by the closing portion 52 by welding or the like.
I try not to face directly. In addition, the tubular portion 5
1 is provided with a large number of holes 51c, ... To allow passage of the refrigerant gas.

A filter 4 is attached to the outer peripheral surface of the tubular portion 51 so as to cover the entire surface of the tubular portion 51. The filter 4 is attached to the filter holder 5 by attaching the filter 4 to the tubular portion. The entire portion 51 is formed in a conical shape along the inclined outer peripheral surface, and the end portion of the filter on the small diameter portion side is used when the closing portion 52 is attached to the small diameter opening portion of the cylindrical portion 51. Fixed portion 51b of 51 and the closing portion 5
When sandwiching between them and fixing them together, when the large diameter side end is fixed to the accumulator body 1 of the flange portion 51a of the cylindrical portion 51, the body portion 12 and the bottom portion 1
It is clamped and fixed together with 3.

Although the filter 4 is formed in a closed shape on the small diameter side, it may be formed in a cylindrical shape having an opening on the small diameter side. Further, the holding body 5 includes the tubular portion 51 and the closing portion 5
2 may be integrally formed, and in such a case, the filter 4 is formed in a conical shape that covers the entire holding body 5.

By doing so, even if a large amount of liquid refrigerant suddenly flows into the accumulator body 1 from the inlet pipe 2, the passage area of the filter 4 is increased, so that the entire surface of the filter 4 is It is possible to prevent the filter 4 from being covered with the liquid refrigerant, to prevent the filter 4 from being clogged with the liquid refrigerant, and to allow the gas refrigerant to pass therethrough. Moreover, the filter holder 5 is formed into a conical shape. Therefore, the liquid refrigerant can flow downward along the slope, and most of the liquid refrigerant can be concentrated on the lower side of the accumulator body 1 so that the liquid refrigerant is almost eliminated on the upper side of the filter 4. Therefore, it is possible to reliably prevent clogging of the upper portion of the filter 4 due to the liquid refrigerant, and to reliably allow the gas refrigerant to pass therethrough. Therefore, even if a large amount of liquid refrigerant flows into the accumulator body 1, the pressure difference between the inlet pipe arrangement side space 6 and the outlet pipe arrangement side space 7 does not increase, and as a result, the compression is reduced. It is necessary that the sliding portion inside the machine does not cause seizure, and a sufficient amount of gas refrigerant can be supplied. Further, foreign matter such as dust that has flowed into the accumulator body 1 can be stored at the bottom of the filter 4 that does not hinder the passage of the gas refrigerant, and the filter 4 can be shaped by the filter holder 5. Since the filter 4 can be held, it can be prevented from being deformed even if the filter 4 becomes clogged.

[0013]

According to the present invention, in the accumulator body 1, the inner wall of the tubular body 12 is inclined obliquely inward from the opening position of the outlet pipe opening 31 to the vicinity of the inlet pipe opening 21. A filter holder 5 including an extending tubular portion 51 and a closing portion 52 that closes an end portion of the tubular portion 51 on which the inlet pipe is provided is disposed, and the holder 5 allows the inside of the accumulator main body 1 to enter. It is divided into an installation side space 6 and an outlet pipe installation side space 7, and a large number of holes 5 are formed in the front cylindrical portion 51.
1c is formed, and the filter 4 that covers the entire surface of the tubular portion 51 is attached to the outer peripheral surface of the tubular portion 51. Therefore, even if a large amount of liquid refrigerant suddenly flows into the accumulator body 1 from the inlet pipe 2. Since the passing area of the filter 4 is increased, it is possible to prevent the entire surface of the filter 4 from being covered with the liquid refrigerant.
The clogging of the liquid refrigerant can be prevented and the gas refrigerant can be passed therethrough. Moreover, since the filter holding body 5 is formed by the tubular portion 51 and the closing portion 52, the liquid refrigerant is moved downward along the slope. The liquid refrigerant can be made to flow to the lower side of the accumulator body 1 so that the liquid refrigerant can be almost eliminated on the upper side of the filter 4, and the liquid refrigerant can be removed on the upper side of the filter 4. It is possible to reliably prevent clogging by the refrigerant and allow the gas refrigerant to pass through. Therefore, even if a large amount of liquid refrigerant flows into the accumulator body 1, the differential pressure between the inlet pipe arrangement side space 6 and the outlet pipe arrangement side space 7 does not increase, and as a result, the inside of the compressor is reduced. Therefore, it is necessary to supply the sufficient amount of gas refrigerant without causing seizure in the sliding part. Further, foreign matter such as dust that has flowed into the accumulator body 1 can be stored in the bottom portion of the filter 4 that does not hinder the passage of the gas refrigerant.
Moreover, since the shape of the filter 4 can be held by the filter holder 5, it is possible to prevent the filter 4 from being deformed even if it becomes clogged.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an accumulator of the present invention.

FIG. 2 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Accumulator Main Body 12 Cylindrical Body 2 Inlet Pipe 21 Inlet Pipe Opening 3 Outlet Pipe 31 Outlet Pipe Opening 4 Filter 5 Filter Holder 51 Cylindrical 51c Hole 52 Closing 6 Inlet Pipe Arrangement Side Space 7 Outlet Pipe Arrangement Side space

Claims (1)

[Claims] 1. A closed type accumulator main body 1 having a cylindrical body portion 12, and an inlet pipe 2 and an outlet pipe 3 inside the main body 1.
Is an accumulator in which the filter 4 is attached in a transverse shape between the inlet pipe opening 21 and the outlet pipe opening 31 of the body 12, and the tubular shape is provided in the main body 1. A cylindrical portion 51 extending obliquely inward from the opening position of the outlet pipe opening 31 on the inner wall of the body 12 and extending to the vicinity of the inlet pipe opening 21 and an end portion on the inlet pipe arrangement side of the cylindrical portion 51. A filter holder 5 composed of a closing portion 52 for closing is arranged, and the holder 5 divides the accumulator body 1 into an inlet pipe arrangement side space 6 and an outlet pipe arrangement side space 7. Many holes 5 in the front cylinder part 51
1c is formed, and the filter 4 that covers the entire surface of the tubular portion 51 is attached to the outer peripheral surface of the tubular portion 51.