JPH11115470A - Gas-liquid separator for car air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a structure of a gas-liquid separator for refrigerant used in a car air conditioner. SOLUTION: A gas-liquid separator for a car air conditioner 1 has a cylindrical main body 10 and a header 20 sealing an opening part of the main body 10. An inlet port 22 for refrigerant, an outlet port 24 for refrigerant in liquid- phase, and an outlet port for refrigerant in gas-phase are formed in the header. A lower end part of a discharge pipe 40 for refrigerant in liquid-phase arranged in a central part of the main body 10 is supported by a first holder 70. A second holder 60 fitted in an intermediate section of the pipe 40 supports a discharge pipe assembly body 50 for refrigerant in gas-phase. A drying member 80 removing water in the refrigerant is nipped and supported between pipes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid separator provided in a car air conditioner for storing a refrigerant.

[0002]

2. Description of the Related Art A car air conditioner is equipped with a compressor, condenser, expansion valve, evaporator and other components constituting a refrigeration cycle, as well as a receiver dryer for storing refrigerant and removing moisture. As for the refrigerant, the liquid-phase refrigerant and the gas-phase refrigerant are mixed and sent to the receiver dryer.

[0003]

Since a car air conditioner is mounted on a vehicle body with large vibrations, it is necessary to ensure the vibration proofness of the parts, and it is essential to reduce the size and weight.
An object of the present invention is to provide a gas-liquid separator for an air conditioner that has a small number of parts and is excellent in vibration isolation.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a gas-liquid separator provided in a car air conditioner for storing a refrigerant, wherein the gas-liquid separator seals a cylindrical main body and an opening of the main body. A liquid-phase refrigerant disposed at the center of the main body, the pipe being attached to each of a refrigerant inlet port, a liquid-phase refrigerant outlet port, and a gas-phase refrigerant outlet port formed in the header. A first holder abutting on the bottom of the main body supporting the lower end of the discharge pipe, and a second holder fitted at an intermediate portion of the liquid-phase refrigerant discharge pipe and supporting the gas-phase refrigerant discharge pipe It is characterized by having.

[0005] In a preferred aspect of the present invention, the gaseous-phase refrigerant discharge pipe has a first pipe member having an upper end attached to the vapor-phase refrigerant outlet port of the header, and an upper end in the upper space of the main body. A second pipe member arranged in parallel with the first pipe while being opened to allow the gas-phase refrigerant to flow therein, and a connection connecting the first pipe member and the second pipe member near the bottom of the main body And a member.

In another preferred aspect, the connecting member includes a passage connecting the first pipe member and the second pipe member, and a hole communicating between the passage and the main body. It is characterized by. And the first holder,
It is a cylindrical member made of resin, and is characterized by having an opening for introducing a refrigerant on a side surface.

Further, in a preferred aspect of the present invention, the second holder is a resin-made plate-like member, and has an insertion hole for a liquid-phase refrigerant discharge pipe formed at a central portion thereof, and a gas-phase refrigerant injection hole. An insertion hole of the first pipe member, the upper end of which is attached to the outlet port of the gas phase refrigerant of the header constituting the discharge pipe, is disposed in parallel with the first pipe member, and the upper end is formed of the main body. A concave portion for holding the second pipe member opened in the upper space, wherein the first and second pipe members are connected by a connecting member near the bottom of the main body. In a preferred aspect of the present invention, the first holder and the second holder hold a drying member between the holders.

In a preferred embodiment of the gas-liquid separator for a car air conditioner according to the present invention constructed as described above, a liquid-phase refrigerant and a gas-phase refrigerant are separated from a condenser constituting a refrigeration cycle (not shown) through a refrigerant inlet port. Are mixed and sent into the cylindrical main body, the liquid-phase refrigerant is stored in the lower part of the main body, the gas-phase refrigerant is present in the upper part of the main body, and the liquid-phase refrigerant is discharged through the liquid-phase refrigerant discharge pipe. Is sent out of the main body through an outlet port of the first pipe member, and is sent to an expansion valve (not shown). The gas-phase refrigerant flows in from the upper end of the second pipe member, passes through the connecting member, and then flows out of the first pipe member. The refrigerant is sent to a compressor (not shown) through the refrigerant discharge port, and thus gas-liquid separation is performed in the main body. The liquid-phase refrigerant and the refrigerating machine oil flow into the gas-phase refrigerant from a hole formed in the connection member while passing through the connection member, and become a gas-liquid mixed refrigerant. Moreover, each pipe member is the first
Is supported by the second holder and the second holder, so that the vibration of each pipe is reliably prevented. Further, the moisture in the liquid-phase refrigerant is dried by the drying member held by the first holder and the second holder.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view showing an embodiment of the structure of a gas-liquid separator for a car air conditioner according to the present invention, FIG. 2 is a top view, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. It is AA sectional drawing of. The gas-liquid separator for a car air conditioner, generally denoted by reference numeral 1, has a cylindrical main body 10 and a header 20 that covers an opening of the main body. Body 10 and the header 20, for example made of aluminum alloy, both of which are fixed by welding means W _1. The header 20 has three ports 22, 2
4, 26 are provided. The first port 22 is a port to which a refrigerant is supplied from a condenser of the car air conditioner,
A refrigerant in a state where a gaseous refrigerant is mixed with a liquid refrigerant is sent in, and flows into the main body 10 through the pipe 32. Second port 24 provided at the center of header 20
Is a port connected to the expansion valve side, through which the liquid refrigerant stored in the main body 10 is sent out.

A liquid refrigerant discharge pipe 40 (hereinafter, referred to as a center pipe 40) having an upper end attached to the port 24 is supported by inserting a lower end thereof into a first holder 70. An opening for introducing a refrigerant is formed on a side surface of 70. A bulge 40a is formed in the middle of the center pipe 40, and the second holder 60 is inserted from below into the bulge 40a. A bag-shaped drying member 80 is provided between the second holder 60 and the first holder 70.

A third port 26 formed in the header 20
Is connected to the compressor side. On the back surface of the third port 26 of the header 20, a pipe assembly 5 for discharging a gaseous-phase refrigerant is provided.
0 is attached. The pipe assembly 50 includes a first pipe member 52, a second pipe member 54, and a connecting member 56 that connects the two pipe members 52, 54. The first pipe member 52 penetrates a hole provided in the second holder 60 attached to the center pipe 40 and is supported. The connecting member 56 connects the first pipe 52 and the second pipe 54 near the bottom of the main body 10. Connecting member 56
Is disposed in contact with the opening 70 a of the first holder 70. The gas-phase refrigerant accumulated in the upper part of the main body 10 is introduced from the upper end opening 54a of the second pipe member 54, and is sent to the compressor side through the first pipe member 52 via the connecting member 56.

FIG. 5 is an explanatory view showing the entire structure of the pipe assembly 50 with a part thereof in section. First pipe member 5
The second upper end 52a is inserted and fixed to be attached to the third port 26 of the header 20. Connecting member 56
Has a passage 56a, and an opening of the passage 56a has a first
The lower end portions of the pipe member 52 and the second pipe member 54 are inserted and fixed so as to be attached.

FIG. 6 is an enlarged sectional view of a main part of the connecting member 56. In the passage 56a of the connecting member 56, the connecting member 56
Is provided with a small diameter hole 56b communicating with the bottom of the hole 56b.
A strainer 57 is attached so as to cover b. The strainer 57 is formed by forming a wire net into a hemispherical shape, and is attached to the connecting member 56 by forming a caulking portion 56c via a washer 58. With this configuration, the liquid-phase refrigerant and the refrigerating machine oil flow from the hole 56b, and are returned to the compressor together with the gas-phase refrigerant introduced into the pipe assembly 50. The strainer 57 prevents foreign matter from entering the pipe member.

FIG. 7 shows a plan view and a sectional view of the second holder 60. The holder 60 is a plastic plate material, and has a hole 62 through which the center pipe 40 penetrates at the center and a hole 64 through which the first pipe member 52 of the pipe assembly 50 penetrates. Further, a concave portion 66 is provided on the outer peripheral portion of the holder 60, and holds the second pipe member 54 of the pipe assembly 50.

FIG. 8 shows a plan view and a front view of the drying member 80. The drying member 80 is obtained by enclosing a desiccant 82 in a bag made of felt, and its periphery is closed by a sewing machine hooking portion 84. The bag-shaped drying member 80 is supported by being sandwiched between the center pipe 40 and the first pipe member 52 of the pipe assembly, and is supported by the first holder 70 and the second holder 6.
The drying member 80 is held between zero.

FIG. 9 shows a plan view and a sectional view of the first holder 70. The holder 70 is a plastic cylindrical shape, and has a hole 74 at the center thereof into which the lower end of the pipe 40 is inserted. Further, a structure in which a part of the cylindrical portion is cut off to form an opening 70a for introducing the liquid-phase refrigerant in the main body 10 is adopted.

FIG. 10 shows a cross-sectional view and a plan view of the strainer mounted in the first holder 70. Strainer 90
Is formed by forming a metal net into a cylindrical shape.
It is attached with solder. The flange member 92 is press-fitted and fixed in the ring groove 76 inside the first holder 70.

[0018]

As described above, the present invention relates to a gas-liquid separator for storing a refrigerant installed in a car air conditioner, wherein a pipe for sending out a liquid-phase refrigerant is disposed at the center of the main body. Is firmly supported in the main body by the holder. And, since the pipe assembly for sending out the gas-phase refrigerant is supported by the holder inserted into the central pipe, the vibration of the pipe is also ensured. Further, since a felt bag in which a desiccant for removing water mixed in the refrigerant is sealed is held between the holders by sandwiching the bag with a pipe, a means for supporting the drying member is omitted, and the weight is reduced. Can be achieved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a top view showing the embodiment of the present invention.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is an explanatory view of a pipe assembly.

FIG. 6 is an enlarged sectional view of a main part of a connecting member.

FIG. 7 is a plan view and a cross-sectional view of a second holder.

FIG. 8 is a plan view and a front view of a drying member.

FIG. 9 is a plan view and a cross-sectional view of a first holder.

FIG. 10 is a sectional view and a plan view of a strainer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas-liquid separator 10 Main body 20 Header 22 Refrigerant inflow port 24 Liquid phase refrigerant outflow port 40 Liquid phase refrigerant discharge pipe 50 Pipe assembly 52 First pipe member 54 Second pipe member 56 Connecting member 60 Second holder 70 First holder 80 Drying member 90 Strainer

Claims (6)

[Claims] 1. A gas-liquid separator provided in a car air conditioner for storing a refrigerant, comprising: a cylindrical main body; a header for sealing an opening of the main body; a refrigerant inlet port formed on the header; It has a pipe attached to each of a phase refrigerant outlet port and a gas phase refrigerant outlet port, and is provided at the bottom of the main body that supports the lower end of the liquid-phase refrigerant discharge pipe disposed at the center of the main body. A first holder in contact therewith;
A gas-liquid separator for a car air conditioner, comprising a second holder fitted to an intermediate portion of a liquid-phase refrigerant discharge pipe and supporting a gas-phase refrigerant discharge pipe. 2. A gas-phase refrigerant discharge pipe, comprising: a first pipe having an upper end attached to a gas-phase refrigerant outlet port of the header;
A pipe member, an upper end of which opens into the upper space of the main body, into which the gas-phase refrigerant flows, and a second pipe member arranged in parallel with the first pipe; and a first pipe member. The gas-liquid separator for a car air conditioner according to claim 1, further comprising a connecting member that connects the second pipe member near a bottom of the main body. 3. The connecting member according to claim 1, wherein the connecting member includes a passage connecting the first pipe member and the second pipe member, and a hole communicating between the passage and the main body. 2. The gas-liquid separator for a car air conditioner according to 2. 4. The first holder is a cylindrical member made of resin, and has an opening for introducing refrigerant on a side surface.
A gas-liquid separator for a car air conditioner as described. 5. The second holder is a plate-shaped member made of resin, and forms an insertion hole of a liquid-phase refrigerant discharge pipe formed at a center portion and the gas-phase refrigerant discharge pipe. An insertion hole for the first pipe member, the upper end of which is attached to the outlet port of the gas-phase refrigerant of the header, and a second hole, which is disposed in parallel with the first pipe member and whose upper end is opened in the upper space of the main body. And a recess for holding the second pipe member.
The gas-liquid separator for a car air conditioner according to claim 1, wherein the second pipe member and the second pipe member are connected by a connecting member near the bottom of the main body. 6. The gas-liquid separator for a car air conditioner according to claim 1, wherein said first holder and said second holder hold a drying member between said holders.