JP5879142B2 - Gas-liquid separator - Google Patents

Description

  The present invention relates to a gas-liquid separator, and more particularly to a gas-liquid separator that separates and stores a refrigerant or the like circulating through a refrigeration cycle.

  As an example of the gas-liquid separator, as shown in FIG. 3, a cylindrical body 22 with a bottom, a header 23 that seals an upper opening end of the body 22, and a cylindrical shape that is disposed inside the body 22. The refrigerant discharge pipe 25, the refrigerant suction pipe 24 surrounding the refrigerant discharge pipe 25, and the oil return hole 24 a formed at the lower end of the refrigerant suction pipe 24 are arranged on the bottom surface 22 a of the body 22. A gas-liquid separator 21 including a strainer 26 and a cup-shaped gas-liquid separation member 27 that opens downward is used.

  In the gas-liquid separator 21, the refrigerant flowing into the body 22 from the evaporator or the like through the refrigerant inflow hole 23 a of the header 23 is gas-liquid separated by the gas-liquid separation member 27, and the separated liquid refrigerant, and Compressor oil contained in the refrigerant (compressor lubricating oil, hereinafter referred to as “oil”) moves straight down and is stored in the fuselage 22. Thereafter, separation between the liquid refrigerant L and the oil proceeds, and the oil accumulates below the liquid refrigerant L.

  On the other hand, the gas refrigerant moves upward before joining the liquid refrigerant L inside the fuselage 22, enters the refrigerant suction pipe 24 from the upper opening of the refrigerant suction pipe 24, and the inner peripheral surface of the refrigerant suction pipe 24. And the outer peripheral surface of the refrigerant discharge pipe 25, once reaches the lower end of the refrigerant suction pipe 24, and turns upward while sucking the oil accumulated below the liquid refrigerant L from the oil return hole 24a. The gas refrigerant containing oil is discharged from the refrigerant outlet hole 23b of the header 23 and returned to the compressor. Further, the foreign matter contained in the refrigerant reaches the bottom of the body 22 through the same route as the liquid refrigerant and is caught by the strainer 26 to prevent the foreign matter from entering the compressor.

  However, in the conventional gas-liquid separator 21, when the refrigerant flowing from the refrigerant inflow hole 23a is gas-liquid separated, the flowing refrigerant hits the gas-liquid separation member 27. Therefore, the gas-liquid separation member 27 is caused by the pressure of the refrigerant. There was a problem of deformation.

  Therefore, the present invention has been made in view of the problems in the conventional gas-liquid separator, and can prevent deformation of the gas-liquid separation member due to the pressure of the refrigerant flowing into the gas-liquid separator. An object is to provide a gas-liquid separator.

In order to achieve the above object, the present invention seals a cylindrical body having one end opened, the opening end of the body, a coolant inflow hole and a coolant outflow hole, and has a planar inner surface. A header is formed in a cup shape that opens to the bottom side of the fuselage, and is disposed so that a surface facing the inner surface of the header is parallel to the inner surface of the header, and flows from the refrigerant inflow hole of the header. A gas-liquid separating member that gas-liquid separates the refrigerant to be gas-liquid separated from the refrigerant inflow hole of the header, and the separated gas refrigerant together with the oil stored in the bottom of the fuselage In the gas-liquid separator led to the refrigerant outflow hole, the gas-liquid separation member has a rib on a surface facing the header, and the header has a groove corresponding to the rib on a surface facing the gas-liquid separation member. Or having a convex part, the groove part or Wherein the parts and said ribs are fitted to each other.

  According to the present invention, since the rib is provided on the upper surface of the gas-liquid separation member to improve the strength of the gas-liquid separation member, the deformation of the gas-liquid separation member due to the pressure of the refrigerant flowing from the refrigerant inflow hole is prevented. Is possible. Further, since the groove portion or the convex portion is provided in the header, and the groove portion or the convex portion and the rib are fitted, it is possible to prevent the gas-liquid separation member from rotating due to an external force or the like. As a result, it is possible to prevent the gap between the outer surface of the gas-liquid separation member and the inner surface of the body from fluctuating, thereby preventing the gas-liquid separation performance from being deteriorated.

  The gas-liquid separator may be configured such that a part of the rib is opposed to the refrigerant inflow hole. Thereby, since the refrigerant flowing in from the refrigerant inflow hole directly collides with the rib provided in the gas-liquid separation member, the deformation of the gas-liquid separation member due to the pressure of the refrigerant can be prevented more reliably. The refrigerant flowing into the gas-liquid separator can be effectively dispersed.

  As described above, according to the present invention, it is possible to prevent the gas-liquid separation member from being deformed by the pressure of the refrigerant flowing into the gas-liquid separator.

It is a figure which shows one Embodiment of the gas-liquid separator which concerns on this invention, (a) is front sectional drawing, (b) looked at the gas-liquid separation member in the AA line of (a) from the upper surface direction. FIG. 4C is a cross-sectional view of the cross section taken along line AA in FIG. It is a figure for demonstrating the operation | movement by one Embodiment of the gas-liquid separator which concerns on this invention, (a) is front sectional drawing, (b) is the gas-liquid separation member in the BB line of (a). The figure seen from the upper surface direction, (c) is the sectional view which looked at the cross section by the BB line of (a) from the bottom face direction. It is a schematic sectional drawing which shows an example of the conventional gas-liquid separator.

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

  FIG. 1 shows an embodiment of a gas-liquid separator according to the present invention. This gas-liquid separator 1 includes a bottomed cylindrical body 2 and a header 3 that seals the open end of the body 2. The cylindrical refrigerant discharge pipe 5 disposed inside the body 2, the refrigerant suction pipe 4 surrounding the refrigerant discharge pipe 5, and the oil return hole 4 a formed at the lower end of the refrigerant suction pipe 4 are surrounded. A strainer 6 disposed on the bottom surface 2a of the body 2 and a cup-shaped gas-liquid separation member 7 opening downward are provided.

  The body 2 is made of a metal such as an aluminum alloy, and is formed in a bottle shape having a bottomed cylindrical shape with an upper portion opened. As described above, the upper opening of the body 2 is sealed by the header 3, and the refrigerant suction pipe 4, the refrigerant discharge pipe 5, the strainer 6, and the gas-liquid separation member 7 are accommodated in the body 2.

  The header 3 is made of a metal such as an aluminum alloy, and includes a disk-shaped base portion 3a, an upper portion (protruding portion) 3b protruding upward from the base portion 3a, and a cylindrical lower portion 3c protruding downward from the base portion 3a. Then, the refrigerant inflow hole 3d and the refrigerant outflow hole 3e penetrate in the vertical direction. On the upper surface 3g of the upper part 3b, a female screw part 3f for fixing a flange for connecting a pipe fitted to the refrigerant inflow hole 3d and the refrigerant outflow hole 3e is screwed.

  A groove 3h (see FIG. 1C) is provided on the lower surface of the lower portion 3c. The groove 3h is provided, for example, radially from the center of the refrigerant outflow hole 3e that penetrates the lower part 3c, and a rib 7b provided in a gas-liquid separation member 7 described later is fitted therein.

  The refrigerant discharge pipe 5 is made of a metal such as an aluminum alloy, and is press-fitted and fixed in the refrigerant suction pipe 4 by a rib (not shown) extending in the axial direction inside the refrigerant suction pipe 4. The upper end of the refrigerant discharge pipe 5 is fixed to the lower part of the refrigerant outflow hole 3e by caulking or the like.

  The refrigerant suction pipe 4 is formed so as to surround the refrigerant discharge pipe 5, and an upper end portion of the refrigerant suction pipe 4 is opened, and an oil return hole 4a is formed at the lower end portion. A lower end portion of the refrigerant suction pipe 4 protrudes downward while being surrounded by the strainer 6, and an oil return hole 4 a is formed at the distal end portion thereof by mechanical processing such as drawing or cutting or pressing.

  The strainer 6 is positioned below the lower end portion of the refrigerant suction pipe 4 and is fixed on the bottom surface 2a of the body 2 while surrounding the oil return hole 4a.

  The gas-liquid separation member 7 is formed of resin, metal, or the like, and as shown in FIG. 1B, through holes 7a and ribs 7b through which the refrigerant discharge pipe 5 passes are formed. The rib 7b is for reinforcing the gas-liquid separation member 7, and is formed on the upper surface of the gas-liquid separation member 7, for example, so as to protrude upward and extend radially from the center of the through hole 7a. The Further, the rib 7b is provided so that a part thereof is located on the center line of the refrigerant inflow hole 3d of the upper header 3.

  The rib 7 b is fitted with a groove 3 h provided in the lower portion 3 c of the header 3 when the gas-liquid separation member 7 is attached. Thereby, it is possible to prevent the gas-liquid separation member 7 from rotating due to an external force or the like.

  Next, operation | movement of the gas-liquid separator 1 which has the said structure is demonstrated, referring FIG. In the following description, the gas-liquid separator 1 is disposed between the evaporator and the compressor of the refrigeration cycle, the refrigerant from the evaporator is separated into liquid refrigerant and gas refrigerant, and the liquid refrigerant is gas-liquid. A case where the gas refrigerant is stored in the separator 1 and the gas refrigerant is returned to the compressor (so-called accumulator) will be described as an example.

  The refrigerant from the evaporator flows into the body 2 from the refrigerant inflow hole 3d of the header 3 in FIG. 1, and then collides with the gas-liquid separation member 7 to be gas-liquid separated. At this time, since a part of the rib 7b provided on the gas-liquid separation member 7 exists on the center line of the refrigerant inflow hole 3d, the refrigerant flowing in from the refrigerant inflow hole 3d directly collides with the rib 7b. Thus, deformation of the gas-liquid separation member 7 due to the pressure of the refrigerant can be prevented, and the refrigerant flowing into the gas-liquid separator 1 can be effectively dispersed.

  The liquid refrigerant separated by the gas-liquid separation member 7 and the oil contained in the refrigerant move straight down as they are and are stored in the body 2. Thereafter, separation between the liquid refrigerant L and the oil proceeds, and the oil accumulates below the liquid refrigerant L.

  On the other hand, the gas refrigerant moves upward before joining the liquid refrigerant L inside the body 2, enters the refrigerant suction pipe 4 from the upper opening of the refrigerant suction pipe 4, and the inner peripheral surface of the refrigerant suction pipe 4. And the outer peripheral surface of the refrigerant discharge pipe 5, then reaches the lower end of the refrigerant suction pipe 4, and then turns upward while sucking the oil accumulated below the liquid refrigerant L from the oil return hole 4 a. The inside of the discharge pipe 5 rises, and the gas refrigerant containing oil is discharged from the refrigerant outflow hole 3e of the header 3 and returned to the compressor. Further, the foreign matter contained in the refrigerant reaches the bottom of the body 2 through the same route as the liquid refrigerant and is captured by the strainer 6.

  As described above, according to the present embodiment, the rib 7b is provided on the upper surface of the gas-liquid separation member 7, and the strength of the gas-liquid separation member 7 is improved, so that the gas due to the pressure of the refrigerant flowing in from the refrigerant inflow hole 3d. The deformation of the liquid separation member 7 can be prevented. Moreover, since the groove part 3h is provided with respect to the lower part 3c of the header 3, and the groove part 3h and the rib 7b are fitted, it can prevent that the gas-liquid separation member 7 rotates by the force from the outside. As a result, it is possible to prevent the gap between the outer surface of the gas-liquid separation member 7 and the inner surface of the body 2 from fluctuating, and thus it is possible to prevent the gas-liquid separation performance from being deteriorated.

  Further, according to the present embodiment, since the rib 7b is provided so that a part of the rib 7b is located on the center line of the refrigerant inflow hole 3d of the header 3, when the refrigerant flows in, the refrigerant is in the rib 7b. Therefore, the gas-liquid separation member 7 can be more reliably prevented from being deformed by the refrigerant pressure, and the refrigerant flowing into the gas-liquid separator can be effectively dispersed.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and applications can be made without departing from the scope of the present invention.

  For example, in the above-described embodiment, the gas-liquid separation member 7 is provided with the rib 7b protruding outward, and the header 3 is provided with the groove portion 3h that fits with the rib 7b. The member 7 may be provided with a convex rib on the inside, and the header 3 may be provided with a convex portion that fits the rib.

  Further, in the above-described embodiment, the rib 7b is located on the center line of the refrigerant inflow hole 3d of the header 3, but the rib 7b faces the refrigerant inflow hole 3d of the header 3 even if it is not such a configuration. If it is a structure, the effect similar to the case where the rib 7b is located on the centerline of the refrigerant | coolant inflow hole 3d of the header 3 can be acquired.

  Furthermore, in the above-described embodiment, the grooves 3h and the ribs 7b are provided radially from the center of the refrigerant outflow hole 3e. However, the present invention is not limited to this. Any configuration that can prevent the rotation of the member 7 may be used.

DESCRIPTION OF SYMBOLS 1 Gas-liquid separator 2 Body 2a Bottom face 3 Header 3a Base part 3b Upper part 3c Lower part 3d Refrigerant inflow hole 3e Refrigerant outflow hole 3f Female thread part 3g Upper surface 3h Groove part 4 Refrigerant suction pipe 4a Oil return hole 5 Refrigerant discharge pipe 6 Strainer 7 Gas-liquid separation Member 7a Through hole 7b Rib

Claims (2)

A cylindrical body with one end open;
Sealing the opening end of the body, a refrigerant inflow hole and a refrigerant outflow hole are formed , and a header having a planar inner surface ;
It is formed in a cup shape that opens to the bottom side of the fuselage, and is disposed so that the surface facing the inner surface of the header is parallel to the inner surface of the header, and the refrigerant flowing in from the refrigerant inflow hole of the header A gas-liquid separation member for gas-liquid separation,
In the gas-liquid separator for separating the refrigerant flowing in from the refrigerant inflow hole of the header into the refrigerant outflow hole together with the oil stored in the bottom of the fuselage,
The gas-liquid separation member has a rib on a surface facing the header,
The header has grooves or protrusions corresponding to the ribs on the surface facing the gas-liquid separation member,
The gas-liquid separator, wherein the groove or projection and the rib are fitted to each other.   The gas-liquid separator according to claim 1, wherein a part of the rib is configured to face the refrigerant inflow hole.

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