JP2014102058A - Accumulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an accumulator capable of suppressing the occurrence of abnormal noise accompanying the generation of air bubbles to the minimum, in the accumulator provided with a gas-liquid separation member.SOLUTION: An accumulator 1 includes a tank main body 2 comprising a cylindrical barrel body 3 with an upper end opening and a header 4 connected to an opening part of the barrel body. Therein, a coolant inflow pore 8 and a coolant outflow pore 9 which are opened in the vertical direction are disposed on the header, an inner pipe 6 is connected to the coolant outflow pore, an outer pipe 5 is arranged on the outside of the inner pipe so as to form a double pipe, a gas-liquid separation member 16 to which a coolant inflow port of the header is opposed is installed fixedly on an upper space position in the barrel body, and an extension member 20 is disposed so as to be extended horizontally from the outer pipe integrally on a position in the proximity to the lower side of the gas-liquid separation member and a desiccant agent bag 7 is suspended and retained onto the extension member. At least two cut-off grooves 7c are disposed on the desiccant agent bag and an arm part 20a of the extension member is inserted to the cut-off grooves and can be suspended and retained.

Description

  The present invention relates to an accumulator of a type in which a refrigerant circulating in a refrigeration cycle is gas-liquid separated and stored.

  A receiver tank, an accumulator, or the like is used to separate and store the refrigerant circulating in the refrigeration cycle. As this type of accumulator, for example, Patent Document 1 includes a housing, a pipe portion disposed in the housing, a filter, an internal machine part such as a bag enclosing a desiccant, and the like. The refrigerant flowing into the gas collides with the shade as a gas-liquid separation member and is gas-liquid separated into a gas-phase refrigerant and a liquid-phase refrigerant containing oil, and the separated gas-phase refrigerant enters the pipe part. The accumulator discharged from the outlet is described.

  Further, in Patent Document 2, a bottle-shaped body having an upper end opened, a main body (header) provided with a refrigerant inflow hole and a refrigerant outflow hole, and disposed below the body. The refrigerant flowing into the main body from the refrigerant inlet hole of the main body is converted into a swirling flow at the swirling portion, and is converted into a liquid refrigerant and a gas refrigerant by centrifugal separation using the swirling flow. A separate accumulator is described.

Japanese Utility Model Publication No. 57-2371 JP 2011-21773 A

  In the swivel type accumulator described in Patent Document 2, there is no particular problem. However, as described in Patent Document 1, a gas-liquid separation member is provided below the header in which the refrigerant inflow hole and the refrigerant outflow hole are formed. In the existing accumulator, there is a problem that bubbles are generated when the desiccant comes into contact with the liquid refrigerant accumulated in the lower part of the body, and the bubbles collide with the gas-liquid separation member to generate a large noise.

  Therefore, in view of the problems in the conventional technology, the present invention provides an accumulator that can minimize the generation of abnormal noise accompanying the generation of bubbles in an accumulator provided with a gas-liquid separation member. Objective.

  In order to achieve the above object, an accumulator according to the present invention includes a tank body including a cylindrical body having an upper end opening and a header connected to the opening of the body, and the header has a longitudinal opening. A refrigerant inflow hole and a refrigerant outflow hole are connected, an inner pipe is connected to the refrigerant outflow hole, and an outer pipe is formed on the outside of the double pipe. A gas-liquid separation member facing the refrigerant inflow hole of the header is fixedly installed, and is extended so as to extend integrally from the outer pipe horizontally at a position close to the lower side of the gas-liquid separation member. The desiccant bag is suspended and held by the extending member.

  According to the accumulator of the present invention, since the desiccant bag is suspended from the extending member, even if the liquid phase refrigerant stored in the tank body and the desiccant come into contact with each other and bubbles are generated, the gas-liquid is generated from the position where the bubbles are generated. Since the distance to the separation member is short, it is possible to avoid the bubbles from strikingly colliding with the gas-liquid separation member, and the generation of abnormal noise can be minimized. Further, since the hanging type is adopted as the fixing method of the desiccant bag, the bag can be reliably fixed in the tank body at low cost.

  In the above accumulator, the desiccant bag is provided with at least two cut grooves, and the arm portion of the extending member is inserted into the cut groove to be suspended, so that the desiccant bag is attached. These parts can be omitted and can be easily attached to the refrigerant outlet pipe.

  In the above accumulator, by adopting a structure in which the extending member is provided with a cylindrical portion facing the inner peripheral surface of the body with a gap, the desiccant and the refrigerant are effectively brought into contact with each other inside the cylindrical portion, and the refrigerant absorbs moisture. Can be performed efficiently.

  As described above, according to the present invention, in the accumulator including the gas-liquid separation member, the extending member is provided at a position close to the lower side of the gas-liquid separating member, and the desiccant bag is suspended from the extending member. It is possible to minimize the generation of sound.

It is a figure which shows 1st Embodiment of the accumulator which concerns on this invention, (a) is sectional drawing, (b) is the sectional view on the AA line of (a), (c) is BB of (b). It is line sectional drawing. It is an expanded view of the desiccant bag shown in FIG. It is a figure which shows 2nd Embodiment of the accumulator which concerns on this invention, (a) is sectional drawing, (b) is the DD sectional view taken on the line of (a). It is an expanded view of the desiccant bag shown in FIG.

  Next, preferred embodiments for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows a first embodiment of an accumulator according to the present invention. This accumulator 1 is composed of a tank body 2 composed of a body 3 and a header 4, an outer pipe 5 disposed in the tank body 2, and an inner pipe. 6 and internal parts such as a bag 7.

  The tank body 2 is configured by connecting a header 4 via a welded portion 10 to a cylindrical body 3 having an upper end opening. The body 3 and the header 4 are both made of a metal such as an aluminum alloy.

  In the header 4, a refrigerant inflow hole 8 and a refrigerant outflow hole 9 are opened in the vertical direction. The refrigerant outflow hole 9 communicates with the inner pipe 6.

  Below the header 4, a mixed refrigerant (refrigerant in which a gas phase component and a liquid phase component are mixed) from the refrigerant inflow hole 8 is mixed with a high-density liquid phase refrigerant and compressor oil (hereinafter referred to as “oil”), and a density. A gas-liquid separation member 16 that separates into a gas phase refrigerant having a low level is arranged in an inverted dish shape.

  Inside the body 3, an outer pipe 5 into which gas-liquid separated gas-phase refrigerant flows and an inner pipe 6 that guides the gas-phase refrigerant that has flowed into the outer pipe 5 to the refrigerant outlet hole 9 are arranged in a double tube structure. Is done.

  The outer pipe 5 is made of synthetic resin, and is joined to the body 3 with the upper end portion 5a opened. The outer pipe 5 is integrally formed with an extending member 20 extending horizontally from the outer pipe 5 at the upper position. The extending member 20 is provided with four arm portions 20a and a total of four reinforcing ribs 20b protruding upward from the upper surface.

  A bag (hereinafter referred to as “desiccant bag”) 7 containing a desiccant (moisture absorbent) 7a is provided with three cut grooves 7c as shown in FIG. 2, and a cut as shown in FIG. 1 (c). The arm portion 20a of the extending member 20 is inserted into the groove 7c so as to be suspended and held by the extending member 20. The desiccant bag 7 may be provided with two cut grooves 7c, and the desiccant bag 7 may be suspended and supported by two opposing arm portions 20a.

  A pipe rib 23 that is in contact with the outer peripheral surface of the inner pipe 6 is integrally formed on the lower inner peripheral surface of the outer pipe 5. The bottom of the outer pipe 5 is provided with a strainer 22 in which a mesh member 21 made of metal or resin is insert-molded, and an oil return hole 24 that guides oil into the inner pipe 6.

  The inner pipe 6 is made of a metal such as an aluminum alloy, the lower end portion 6 a is opened, and the upper end portion 6 b is connected to the refrigerant outflow hole 9 of the header 4. Further, the lower part of the inner pipe 6 is fitted inside a pipe rib 23 projecting from the inner peripheral surface of the outer pipe 5, whereby the inner pipe 6 is stably held.

  Next, the operation of the accumulator 1 having the above configuration will be described with reference to FIG. In the following description, the accumulator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, and moisture contained in the refrigerant from the evaporator is removed to generate a gas refrigerant, which is supplied to the compressor. The case of returning will be described as an example.

  The refrigerant discharged from the evaporator is returned to the accumulator 1 through a connection pipe (not shown). The refrigerant that has reached the accumulator 1 flows into the fuselage 3 through the refrigerant inflow hole 8, and then collides with the gas-liquid separation member 16, so that a high-density liquid-phase refrigerant and oil and a low-density gas-phase refrigerant (gas refrigerant). ) And are separated.

  The gas-phase refrigerant, liquid-phase refrigerant and oil after gas-liquid separation pass through the gaps between the arm portions 20a of the extending member 20, and moisture and moisture are absorbed by the desiccant bag 7, and the liquid-phase refrigerant and oil are absorbed. Is stored at the bottom of the body 3 by its own weight. In the process, the separation of the liquid phase refrigerant and the oil proceeds, and the oil accumulates below the liquid phase refrigerant.

  Since the desiccant bag 7 is suspended from the extending member 20, even if bubbles are generated in the liquid-phase refrigerant stored in the tank body 2, it is possible to avoid the bubbles from strikingly colliding with the gas-liquid separation member 16. And the occurrence of abnormal noise can be minimized.

  The gas-phase refrigerant after the gas-liquid separation passes through the inside of the gas-liquid separation member 16 and flows into the outer pipe 5 and descends in the outer pipe 5. After that, it is folded at the bottom of the outer pipe 5 and flows into the inner pipe 6, rises in the inner pipe 6, and is guided to the refrigerant outflow hole 9. At this time, the oil accumulated at the bottom of the body 3 is removed by the strainer 22 and sucked through the oil return hole 24 and guided to the refrigerant outflow hole 9 together with the gas phase refrigerant. The gas-phase refrigerant containing oil is discharged from the refrigerant outflow hole 9 and conveyed to the compressor through a connection pipe (not shown).

  FIG. 3 shows a second embodiment of the accumulator according to the present invention. This accumulator 31 is replaced with a desiccant bag 37 and a stretching member 40 in place of the desiccant bag 7 and the stretching member 20 of the accumulator 1 shown in FIG. The components other than the desiccant bag 37 and the stretching member 40 are the same as those of the accumulator 1 in FIG. Therefore, the configurations of the desiccant bag 37 and the extending member 40 will be described below, and the same components as those in FIG.

  As shown in FIG. 4, the desiccant bag 37 includes the desiccant 37 a and includes two cut grooves 37 c that are one less than the desiccant bag 7 shown in FIG. 1 when the stretching member 40 is installed.

  The extending member 40 includes two arm portions 40 a that are inserted into the cut grooves 37 c of the desiccant bag 37 and a cylindrical portion 40 c that is formed in an inverted bowl shape and accommodates the desiccant bag 37. The cylindrical portion 40c is formed integrally with the arm portion 40a.

  The basic operation of the accumulator 31 having the above-described configuration is the same as that of the accumulator 1 shown in FIG. 1, and detailed description thereof is omitted. However, the refrigerant flowing into the body 3 from the refrigerant inflow hole 8 is separated into gas and liquid. After gas-liquid separation by the member 16, the gas passes through the gap C between the inner wall of the body 3 and the cylindrical portion 40 c and the cut groove 40 d for forming the arm portion 40 a, and is lowered by the desiccant bag 37.・ Moisture is absorbed.

  In the present embodiment, since the desiccant bag 37 is accommodated in the cylindrical portion 40c, the desiccant bag 37 can be held more stably, and the contact between the desiccant 37a and the refrigerant is effective inside the cylindrical portion 40c. It is possible to efficiently absorb moisture and moisture.

  The method for suspending the desiccant bags 7 and 37 is not limited to the above, and the cutting grooves 7c and 37c and the arms of the extending members 20 and 40 are taken into consideration in consideration of the dimensions of the bags 7 and 37 and the certainty of holding. You may increase the number of the parts 20a and 40a.

DESCRIPTION OF SYMBOLS 1 Accumulator 2 Tank main body 3 Body 4 Header 5 Outer pipe 5a Upper end part 6 Inner pipe 6a Lower end part 6b Upper end part 7 Desiccant bag 7a Desiccant 7c Cut groove 8 Refrigerant inflow hole 9 Refrigerant outflow hole 10 Welding part 16 Gas-liquid separation member 20 Stretch member 20a Arm portion 20b Rib 21 Mesh member 22 Strainer 23 Pipe rib 24 Oil return hole 31 Accumulator 37 Desiccant bag 37a Desiccant 37c Cut groove 40 Stretch member 40a Arm portion 40c Cylindrical portion 40d Cut groove C Gap

Claims (3)

A tank body comprising a cylindrical body having an upper end opening and a header connected to the opening of the body;
The header is provided with a refrigerant inflow hole and a refrigerant outflow hole that open in the vertical direction,
An inner pipe is connected to the refrigerant outflow hole, and an outer pipe is arranged on the outside to form a double pipe,
In the upper space position in the fuselage, a gas-liquid separation member facing the refrigerant inflow hole of the header is fixedly installed,
An extending member is provided to extend horizontally from the outer pipe at a position close to the lower side of the gas-liquid separating member,
An accumulator, wherein a desiccant bag is suspended and held by the extending member. The accumulator according to claim 1, wherein the desiccant bag is provided with at least two cut grooves, and the arms of the extending member are inserted into the cut grooves and held suspended. The accumulator according to claim 1, wherein the extending member is provided with a cylindrical portion facing the inner peripheral surface of the body with a gap.

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