JP6785873B2 - Gas-liquid separator - Google Patents

Description

The present invention relates to, for example, a gas-liquid separator used in a refrigerating cycle device of an air conditioner.

As a conventional gas-liquid separator, a cylindrical container, a refrigerant gas inlet pipe connected by being inserted into the container from one end in the longitudinal direction of the container, and a refrigerant provided at a position above the container. Some are composed of a gas outlet pipe or the like (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 09-250848

In the conventional gas-liquid separator, since the outlet pipe extends upward from the upper part of the container, it is necessary to increase the vertical dimension of the outdoor unit in order to store it in the outdoor unit. In addition, since a hole is made in the upper part of the container and the outlet pipe is pushed into the hole, the pressure resistance of the container decreases, the number of brazing points for connecting the outlet pipe increases, and the processability of the gas-liquid separator is not good. There was a problem.

The present invention has been made to solve the above-mentioned problems, and provides a gas-liquid separator capable of improving the pressure resistance of the container without increasing the dimension in the height direction of the container. The purpose is.

The gas-liquid separator according to the present invention is a gas-liquid separator that separates the inflowing gas-liquid two-phase refrigerant into a gas refrigerant and a liquid refrigerant and causes the gas refrigerant and the liquid refrigerant to flow out, respectively, and is formed in a cylindrical shape. A container, a gas pipe provided at one end of both ends in the longitudinal direction of the container and having a pipe port for sucking gas refrigerant in the container, and one end of the container and the other end on the opposite side of the end, respectively. The pipe connection part provided and the pipe connection part on each of the three sides are provided, and the pipe connection part on one end side is fitted into one of the two receiving ports facing each other, and the inside of the container is inserted into the other receiving port. The gas pipe extending from the container is provided with a T-shaped joint fitted through the pipe connection portion, and the pipe mouth of the gas pipe is formed obliquely with respect to the axial direction of the gas pipe and is formed with the center in the longitudinal direction of the container. be located between the one end portion in a side view, the wall of the tube opening of the gas pipe, towards one end of the container, high have position than the other end on the opposite side to the one end portion near is, the tube connecting portion of one end side has an inner diameter that is larger than the outer diameter of the gas pipe.

According to the present invention, since a gas pipe having a pipe port for sucking the gas refrigerant in the container is provided at one end of both ends in the longitudinal direction of the container, the height of the container is higher than that of a conventional gas-liquid separator. The dimension in the direction can be suppressed. Therefore, it is not necessary to increase the vertical dimension of the outdoor unit, and the outdoor unit can be made compact.
Further, as described above, since the gas pipe is provided at one end of both ends in the longitudinal direction of the container, compared with the conventional gas-liquid separator having a hole for passing the gas pipe at the upper part of the container. The pressure resistance of the container can be increased.

It is sectional drawing which shows the schematic structure of the gas-liquid separator which concerns on Embodiment 1 of this invention. It is a vertical sectional view of the T-shaped joint shown in FIG. 1 as viewed from the direction of arrow AA. It is sectional drawing which shows the processing procedure of the gas-liquid separator of FIG. It is a cross-sectional view for demonstrating the function of the gas-liquid separator shown in FIG. It is sectional drawing which shows the schematic structure of the gas-liquid separator which concerns on Embodiment 2 of this invention. It is sectional drawing for demonstrating the gas-liquid separator which concerns on Embodiment 3 of this invention.

Embodiment 1.
FIG. 1 is a cross-sectional view showing a schematic configuration of a gas-liquid separator according to a first embodiment of the present invention, and FIG. 2 is a vertical cross-sectional view of the T-shaped joint shown in FIG. 1 as viewed from the direction of arrow AA. ..
The gas-liquid separator 100 separates the gas-liquid two-phase refrigerant into a gas refrigerant and a liquid refrigerant by reducing the flow velocity of the inflowing gas-liquid two-phase refrigerant and making the flow mode laminar, and the gas refrigerant flows out. It is a device to make. The gas refrigerant is sucked by a compressor (not shown).

As shown in FIG. 1, the gas-liquid separator 100 includes a container 1 having a cylindrical shape and having pipe connecting portions 1a and 1b, and a gas pipe 2 having a pipe port 2a for sucking gas refrigerant in the container 1. It is provided with a T-shaped joint 3. The pipe connecting portions 1a and 1b are provided at one end in the longitudinal direction of the container 1 and the other end on the opposite side of the one end. The T-shaped joint 3 has receiving ports 3a, 3b, and 3c on three sides, respectively, and the pipe connecting portion 1a on the one end side is fitted into one receiving port 3a of the two receiving ports 3a and 3b facing each other. A gas pipe 2 extending from the inside of the container 1 is fitted into the other receiving port 3b through the pipe connecting portion 1a.

As shown in FIG. 2, the inner diameter of the pipe connecting portion 1a is formed to be larger than the outer diameter of the gas pipe 2. Therefore, the gas pipe 2 inserted into the pipe connecting portion 1a penetrates the pipe connecting portion 1a with a gap 4 separated from the inner peripheral wall of the pipe connecting portion 1a. Through this gap 4, the liquid refrigerant in the container 1 passes through the T-shaped joint 3 and flows out from the third receiving port 3c of the T-shaped joint 3. For example, a bypass pipe (not shown) is fitted in the socket 3c. The receiving port 3a and the pipe connecting portion 1a of the T-shaped joint 3, the receiving port 3b and the gas pipe 2, and the receiving port 3c and the bypass pipe are each connected by brazing. The inner diameter of the pipe connecting portion 1b may be formed to be larger than the outer diameter of the gas pipe 2 or smaller than the outer diameter of the gas pipe 2 as in the above-mentioned pipe connecting portion 1a.

The tip side of the gas pipe 2 in the container 1 is bent at a right angle, and the pipe port 2a at the tip of the gas pipe 2 is cut diagonally toward the upstream side in the flow direction of the gas refrigerant. By making the pipe opening 2a slanted, the diameter becomes larger than the diameter before the pipe mouth 2a is cut diagonally, so that the gas refrigerant can be easily sucked and the suction amount of the gas refrigerant is increased. Further, the pipe port 2a is located between the center of the container 1 in the longitudinal direction and one end of the container 1 and closer to the center of the container 1.

Here, the processing procedure of the gas-liquid separator 100 will be described with reference to FIG. The processing procedure of the gas-liquid separator 100 shown below is an example and is not limited.
FIG. 3 is a cross-sectional view showing a processing procedure of the gas-liquid separator of FIG.

(1) A cylindrical member 11 formed in a cylindrical shape is prepared (step S1).
(2) One end side of the cylindrical member 11 is drawn by spinning to form the pipe connecting portion 1a (step S2).
(3) The formed pipe connecting portion 1a is fitted into the receiving port 3a of the T-shaped joint 3, brazed, and inserted into the cylindrical member 11 from the opposite end of the pipe opening 2a of the gas pipe 2 (step S3). ).
(4) Then, the gas pipe 2 is penetrated through the pipe connecting portion 1a and then inserted into the receiving port 3b of the T-shaped joint 3 to expose the terminal side of the gas pipe 2 from the T-shaped joint 3. In this case, the pipe port 2a at the tip of the gas pipe 2 is set so as to be located near the center between the center in the longitudinal direction of the container 1 and one end of the container 1. After that, the receiving port 3b of the T-shaped joint 3 and the gas pipe 2 are brazed (step S4).
(5) Finally, the other end side of the cylindrical member 11 is drawn by spinning, the pipe connecting portion 1b is formed to form the container 1, and the gas-liquid separator 100 is manufactured (step S5).

Next, the function of the gas-liquid separator 100 configured as described above will be described with reference to FIG.
FIG. 4 is a cross-sectional view for explaining the function of the gas-liquid separator shown in FIG.
The gas-liquid separator 100 of the first embodiment is arranged so that the axis of the container 1 is horizontal. When the gas-liquid two-phase refrigerant flows into the container 1 from the pipe connecting portion 1b of the container 1, the flow velocity decreases according to the inner diameter of the container 1. Of the gas-liquid two-phase refrigerants whose flow velocity has decreased, the liquid refrigerant having a heavy specific gravity flows to the lower part of the container 1 and flows in the direction of the arrow indicated by the solid line. On the other hand, the gas refrigerant having a specific gravity lighter than that of the liquid refrigerant is separated above the liquid refrigerant and flows in the direction of the arrow indicated by the broken line. In this way, the flow mode becomes laminar, and the gas-liquid two-phase refrigerant is separated into a gas refrigerant and a liquid refrigerant.

The gas refrigerant is sucked into the pipe opening 2a that is obliquely cut toward the upstream side. This is sucked in by the suction force of the compressor. Since the pipe port 2a of the gas pipe 2 is directed to the upstream side with the pipe connecting portion 1a side as the back surface, the liquid refrigerant flowing to the pipe connecting portion 1a side bounces and droplets are scattered toward the pipe connecting portion 1a side. Even so, it is not sucked by the pipe opening 2a.

Further, since the pipe port 2a of the gas pipe 2 is located closer to the pipe connecting portion 1a than the center in the longitudinal direction of the container 1, the liquid refrigerant flowing in from the pipe connecting portion 1b bounces and droplets are discharged from the container 1. Even if it scatters inward, it does not reach the pipe opening 2a and falls in front of it, and is not sucked by the pipe opening 2a. On the other hand, the liquid refrigerant flowing in the direction of the arrow indicated by the solid line flows into the ring-shaped gap 4 formed between the pipe connecting portion 1a and the gas pipe 2, and flows out from the receiving port 3c of the T-shaped joint 3. ..

As described above, according to the first embodiment, the gas-liquid separator 100 includes a container 1 formed in a cylindrical shape, one end in the longitudinal direction of the container 1, and the other end on the opposite side of the one end. Gas pipes 2 having pipe connection portions 1a and 1b provided in the container 1 and pipe ports 2a for sucking the gas refrigerant in the container 1, and receiving ports 3a, 3b and 3c on three sides, respectively, which face each other 2 A T-shaped joint in which a pipe connecting portion 1a is fitted into one of the receiving ports 3a and 3b, and a gas pipe 2 extending from the inside of the container 1 penetrates through the pipe connecting portion 1a into the other receiving port 3b. It has 3 and. With this configuration, it is possible to suppress the dimension in the height direction orthogonal to the axis of the container 1 as compared with the gas-liquid separator in which the gas pipe is extended from the side wall of the container as described above. Therefore, it is not necessary to increase the vertical dimension of the outdoor unit, and the outdoor unit can be made compact.

Further, since the gas pipe 2 is configured to penetrate the pipe connecting portion 1a of the container 1 and the receiving port 3b of the T-shaped joint 3 connected to the pipe connecting portion 1a, gas is formed on the side wall as in the conventional technique. The pressure resistance of the container 1 can be increased as compared with a container provided with a hole for passing a pipe.

Further, since there are three places to be brazed at the receiving ports 3a, 3b, and 3c of the T-shaped joint 3, only the three parts of the T-shaped joint are required to be heated, and the workability can be improved.

Further, since the pipe port 2a of the gas pipe 2 in the container 1 is cut diagonally toward the upstream side in the flow direction of the gas refrigerant, it is possible to suppress the whistling noise generated when the gas refrigerant flows. ..

Embodiment 2.
FIG. 5 is a cross-sectional view showing a schematic configuration of the gas-liquid separator according to the second embodiment of the present invention. The same parts as those in the first embodiment shown in FIG. 1 are designated by the same reference numerals.
The gas-liquid separator 100 according to the second embodiment has a container 1 formed in a cylindrical shape, and a pipe connecting portion provided at one end of the container 1 in the longitudinal direction and the other end on the opposite side of the one end. It is composed of 1a and 1b and a gas pipe 5 having a pipe port 5a for sucking the gas refrigerant in the container 1.

The gas pipe 5 has a hole 6 provided in a portion of one end of the container 1 below the pipe connection portion 1a so that the pipe port 5a is oblique toward the upstream side in the flow direction of the gas refrigerant. It penetrates and extends diagonally upward. By inserting the gas pipe 5 diagonally upward with respect to the container 1, the pipe port 5a is in a state of being directed to the upstream side with the pipe connecting portion 1a side as the back surface. Further, the pipe opening 5a is located between the center of the container 1 in the longitudinal direction and one end of the container 1 and closer to the center of the container 1. The portion of the gas pipe 5 in contact with the hole 6 is fixed by brazing.

Next, the function of the gas-liquid separator 100 configured as described above will be described.
The gas-liquid separator 100 of the second embodiment is arranged so that the axis of the container 1 is horizontal. When the gas-liquid two-phase refrigerant flows into the container 1 from the pipe connecting portion 1b of the container 1, the flow velocity decreases according to the inner diameter of the container 1 as described above. Of the gas-liquid two-phase refrigerants whose flow velocity has decreased, the liquid refrigerant having a heavy specific gravity flows to the lower part of the container 1 and flows in the direction of the arrow indicated by the solid line. On the other hand, the gas refrigerant having a specific gravity lighter than that of the liquid refrigerant is separated above the liquid refrigerant and flows in the direction of the arrow indicated by the broken line. In this way, the flow mode becomes laminar, and the gas-liquid two-phase refrigerant is separated into a gas refrigerant and a liquid refrigerant.

The gas refrigerant is sucked into the pipe opening 5a obliquely directed to the upstream side. This is sucked in by the suction force of the compressor. Since the pipe port 5a of the gas pipe 5 is directed to the upstream side with the pipe connecting portion 1a side as the back surface, the liquid refrigerant flowing to the pipe connecting portion 1a side bounces and drops on the opposite side in the flow direction of the gas refrigerant. Is not sucked by the pipe opening 5a even if the gas is scattered.

Further, since the pipe port 5a of the gas pipe 5 is located closer to the pipe connecting portion 1a than the center in the longitudinal direction of the container 1, the liquid refrigerant flowing in from the pipe connecting portion 1b bounces and droplets are discharged from the container 1. Even if it scatters inward, it does not reach the pipe opening 5a and falls in front of it, and is not sucked by the pipe opening 5a. On the other hand, the liquid refrigerant flowing in the direction of the arrow indicated by the solid line flows out from the pipe connecting portion 1a.

As described above, according to the second embodiment, the gas pipe 5 of the gas-liquid separator 100 has one end of the container 1 so that the pipe port 5a is inclined toward the upstream side in the flow direction of the gas refrigerant. It penetrates the hole 6 provided in the portion below the pipe connecting portion 1a, and extends diagonally upward. This configuration eliminates the need for processing such as bending the tip end side of the gas pipe 5 or cutting the pipe port 5a of the gas pipe 5 diagonally, so that the structure is larger than that of the gas-liquid separator 100 of the first embodiment. It becomes simple, and the processing becomes easy accordingly, and the manufacturing cost can be reduced.

Further, as described above, since the pipe port 5a in the container 1 is inclined toward the upstream side in the flow direction of the gas refrigerant, it is possible to suppress the whistling sound generated when the gas refrigerant flows.

Embodiment 3.
FIG. 6 is a cross-sectional view for explaining the gas-liquid separator according to the third embodiment of the present invention. FIG. 6 corresponds to step S3 of FIG. 3 described above, and the gas-liquid separator of the third embodiment is configured by sequentially performing the subsequent processing of steps S4 and S5. In the third embodiment, only a part is different from the gas-liquid separator shown in the first embodiment, so only the different part will be described.

In the gas-liquid separator 100 of the third embodiment, for example, one recess 3d extending long in the axial direction of the socket 3b is provided on the inner peripheral wall of the other socket 3b of the T-shaped joint 3. A convex portion 2b that is slidably inserted into the concave portion 3d and locked to the concave portion 3d is provided at a portion of the gas pipe 2 that is fitted into the other receiving port 3b.

As shown in FIG. 6, the gas pipe 2 is inserted into the cylindrical member 11 from the opposite end of the pipe port 2a, the gas pipe 2 penetrates the pipe connecting portion 1a, and then the T-shaped joint 3 Insert into the socket 3b. When the gas pipe 2 is inserted into the receiving port 3b of the T-shaped joint 3, the pipe opening 2a is directed in the direction opposite to the third receiving port 3c of the T-shaped joint 3, and the convex portion 2b of the gas pipe 2 is directed. It is inserted into the recess 3d provided on the inner peripheral wall of the receiving port 3b. When the convex portion 2b of the gas pipe 2 is locked by the concave portion 3d of the T-shaped joint 3, the pipe port 2a of the gas pipe 2 is set at a position between the center in the longitudinal direction of the container 1 and one end of the container 1. At the same time, the pipe port 2a is in a state of facing in the opposite direction to the receiving port 3c of the T-shaped joint 3.

As described above, according to the third embodiment, one recess 3d extending in the axial direction of the receiving port 3b is provided on the inner peripheral wall of the receiving port 3b of the T-shaped joint 3, and the receiving port 3b of the gas pipe 2 is provided. A convex portion 2b that is slidably inserted into the concave portion 3d and locked to the concave portion 3d is provided at a portion to be fitted into the concave portion 3d. With this configuration, the pipe port 2a of the gas pipe 2 is set at a position between the center in the longitudinal direction of the container 1 and one end of the container 1, and the pipe port 2a is set with respect to the receiving port 3c of the T-shaped joint 3. Since the state is oriented in the opposite direction, the performance variation of the gas-liquid separator 100 due to the processing variation can be reduced, and the workability of the gas-liquid separator 100 is also improved.

In the third embodiment, one recess 3d is provided on the inner peripheral wall of the receiving port 3b of the T-shaped joint 3, and a convex portion 2b slidably inserted into the recess 3d is provided in the gas pipe 2. Although it was set to 1, it may be set to 2 for each. For example, another recess is provided on the inner peripheral wall of the receiving port 3b of the T-shaped joint 3 so as to face the recess 3d described above, and in addition to the convex portion 2b provided on the gas pipe 2, the convex portion 2b Another convex portion may be provided at the position on the opposite side.

1 container, 1a, 1b pipe connection, 2 gas pipe, 2a pipe mouth, 2b convex part, 3 T-shaped joint, 3a, 3b, 3c socket, 3d recess, 4 gap, 5 gas pipe, 5a pipe mouth, 6 Hole, 11 cylindrical member, 100 gas-liquid separator.

Claims (5)

In a gas-liquid separator that separates the inflowing gas-liquid two-phase refrigerant into a gas refrigerant and a liquid refrigerant and discharges the gas refrigerant and the liquid refrigerant, respectively.
A container formed in a cylindrical shape and
A gas pipe provided at one end of both ends in the longitudinal direction of the container and having a pipe port for sucking the gas refrigerant in the container.
Pipe connection portions provided at one end of the container and the other end on the opposite side of the one end, respectively.
The gas pipe extending from the inside of the container is fitted into one of the two receiving ports facing each other, and the pipe connecting portion on the one end side is fitted into the other receiving port. A T-shaped joint fitted through the pipe connection,
With
The pipe mouth of the gas pipe is formed obliquely with respect to the axial direction of the gas pipe, and is located between the center in the longitudinal direction of the container and the one end portion.
In a side view, the wall of the pipe mouth of the gas pipe is located at a position higher on the one end side of the container than on the other end side opposite to the one end.
The pipe connecting portion on the one end side is a gas-liquid separator having an inner diameter larger than the outer diameter of the gas pipe. The gas according to claim 1, wherein the gas pipe in the container is bent at the tip end side, and the pipe port at the tip end of the gas pipe is formed obliquely toward the upstream side in the flow direction of the gas refrigerant. Liquid separator. At least one recess extending in the axial direction of the socket is provided on the inner peripheral wall of the other socket of the T-shaped joint, and the recess is formed at a portion of the gas pipe to be fitted into the other socket. A convex portion that is slidably inserted and locked in the concave portion is provided.
When the convex portion of the gas pipe is locked by the concave portion of the T-shaped joint, the pipe mouth of the gas pipe in the container is set at a position between the center in the longitudinal direction of the container and the one end portion. The gas-liquid separator according to claim 1 or 2, wherein the pipe port is oriented in the opposite direction to the third receiving port of the T-shaped joint. An inlet of the liquid refrigerant to the container is provided at the other end of the container.
The gas-liquid separator according to any one of claims 1 to 3 , wherein an outlet of the liquid refrigerant from the container is provided at one end of the container. The gas-liquid separator according to any one of claims 1 to 4 , which is arranged so that the axis of the container is horizontal.

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