WO2018092291A1

WO2018092291A1 - Gas-liquid separator

Info

Publication number: WO2018092291A1
Application number: PCT/JP2016/084391
Authority: WO
Inventors: 浩樹 ▲高▼橋; 智一川越; 幸志東
Original assignee: 三菱電機株式会社
Priority date: 2016-11-21
Filing date: 2016-11-21
Publication date: 2018-05-24
Also published as: GB2570808B; GB201902582D0; GB2570808A; JP6785873B2; JPWO2018092291A1

Abstract

This gas-liquid separator is for separating an in-flowing gas-liquid two-phase refrigerant into a gas refrigerant and a liquid refrigerant, and discharging the gas refrigerant and the liquid refrigerant. The gas-liquid separator is provided with: a container that is formed into a cylindrical shape; and a gas pipe that has a pipe port for sucking the gas refrigerant from the container and that is provided to one of the two ends of the container in a longitudinal direction, wherein the pipe port of the gas pipe is positioned between the one end and the center of the container in the longitudinal direction, and is arranged obliquely toward the upstream side in the flowing direction of the gas refrigerant.

Description

Gas-liquid separator

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

As a conventional gas-liquid separator, a cylindrical container, a refrigerant gas inlet pipe connected to one end in the longitudinal direction of the container inserted into the container from the one end, and a refrigerant provided at a position to be an upper part of the container There is a gas outlet pipe or the like (see, for example, Patent Document 1).

JP 09-250848 A

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. Moreover, 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 is lowered, the number of brazing points connecting the outlet pipe is increased, and the workability of the gas-liquid separator is not good. There was a problem.

The present invention has been made to solve the above-described problems, and provides a gas-liquid separator that can improve the pressure resistance of a container without increasing the dimension in the height direction of the container. For the purpose.

A gas-liquid separator according to the present invention is formed in a cylindrical shape in a gas-liquid separator that separates an inflowing gas-liquid two-phase refrigerant into a gas refrigerant and a liquid refrigerant, and flows out the gas refrigerant and the liquid refrigerant, respectively. A container and a gas pipe provided at one end of both ends in the longitudinal direction of the container and having a pipe for sucking in the gas refrigerant in the container, the pipe opening of the gas pipe having a center and one end in the longitudinal direction of the container It is a position between them and is inclined toward the upstream side in the flow direction of the gas refrigerant.

According to the present invention, since the gas pipe having the pipe port for sucking the gas refrigerant in the container is provided at one end of the both ends in the longitudinal direction of the container, the height of the container is higher than that of the conventional gas-liquid separator. The dimension in the direction can be suppressed. For this reason, it is not necessary to increase the vertical dimension of the outdoor unit, and the outdoor unit can be made compact.
In addition, 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 provided with 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 a cross-sectional view which shows schematic structure of the gas-liquid separator which concerns on Embodiment 1 of this invention. FIG. 2 is a longitudinal sectional view of the T-shaped joint shown in FIG. 1 viewed from the direction of arrows AA. It is a cross-sectional view which shows the process sequence 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 a cross-sectional view which shows schematic structure of the gas-liquid separator which concerns on Embodiment 2 of this invention. It is a cross-sectional view 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 Embodiment 1 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 arrows AA. .
The gas-liquid separator 100 reduces the flow velocity of the inflowing gas-liquid two-phase refrigerant and separates the gas-liquid two-phase refrigerant into the gas refrigerant and the liquid refrigerant by making the flow mode laminar, and the gas refrigerant flows out. It is equipment to let you. The gas refrigerant is sucked by a compressor (not shown).

As shown in FIG. 1, the gas-liquid separator 100 is formed in a cylindrical shape, and includes a container 1 having

pipe connection portions

1a and 1b, a gas pipe 2 having a pipe port 2a for sucking a gas refrigerant in the container 1, And 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 opposite to the one end. The T-shaped joint 3 has receiving

ports

3a, 3b, and 3c in three directions, respectively, and the pipe connecting portion 1a on one end side is fitted into one receiving port 3a of the two

receiving ports

3a and 3b facing each other. The gas pipe 2 extending from the inside of the container 1 is inserted into the other receiving port 3b through the pipe connecting portion 1a.

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

The gas pipe 2 in the container 1 is bent at a front end portion at a right angle, and the tube port 2a at the front end of the gas pipe 2 is cut obliquely toward the upstream side in the flow direction of the gas refrigerant. By making the pipe opening 2a oblique, the diameter becomes larger than the diameter before the pipe opening 2a is cut obliquely, so that it becomes easy to suck the gas refrigerant, and the suction amount of the gas refrigerant is increased. Further, the tube port 2 a is located between the longitudinal center of the container 1 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. In addition, the process sequence of the gas-liquid separator 100 shown below is an example, Comprising: It 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) The one end side of the cylindrical member 11 is squeezed by spinning to form the pipe connecting portion 1a (step S2).
(3) The molded pipe connection portion 1a is fitted into the receiving port 3a of the T-shaped joint 3 and brazed, and inserted into the cylindrical member 11 from the end opposite to the tube port 2a of the gas pipe 2 (step S3). ).
(4) Then, the gas pipe 2 passes through the inside of the pipe connecting portion 1 a and is subsequently inserted into the receiving port 3 b of the T-shaped joint 3, so that the terminal side of the gas pipe 2 is exposed from the T-shaped joint 3. In this case, the tube port 2 a at the tip of the gas pipe 2 is set so as to be positioned closer to the center between the center in the longitudinal direction of the container 1 and one end of the container 1. Thereafter, 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 squeezed by spinning, the tube 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 connection portion 1 b of the container 1, the flow velocity decreases according to the inner diameter of the container 1. Of the gas-liquid two-phase refrigerant having a reduced flow velocity, the liquid refrigerant having a high 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 lighter specific gravity than the liquid refrigerant is separated above the liquid refrigerant and flows in the direction of the arrow indicated by the broken line. Thus, the flow mode becomes laminar and the gas-liquid two-phase refrigerant is separated into the gas refrigerant and the liquid refrigerant.

The gas refrigerant is sucked into the pipe port 2a cut obliquely 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 part 1a side as the back surface, the liquid refrigerant that has flowed to the pipe connecting part 1a has jumped and droplets have been scattered to the pipe connecting part 1a side. However, it is not sucked by the tube port 2a.

Further, since the tube port 2a of the gas pipe 2 is located on the pipe connection part 1a side with respect to the longitudinal center of the container 1, the liquid refrigerant flowing from the pipe connection part 1b jumps and the liquid droplets of the container 1 Even if it splatters inward, it does not reach the tube opening 2a, but falls down and is not sucked by the tube port 2a. On the other hand, the liquid refrigerant that has flowed in the direction of the arrow indicated by the solid line flows into the ring-shaped gap 4 formed between the pipe connecting portion 1 a and the gas pipe 2 and flows out from the receiving port 3 c of the T-shaped joint 3. .

As described above, according to the first embodiment, the gas-liquid separator 100 includes the container 1 formed in a cylindrical shape, one end in the longitudinal direction of the container 1, and the other end opposite to the one end. Have

pipe connection portions

1a, 1b provided in the pipe, a gas pipe 2 having a pipe port 2a for sucking the gas refrigerant in the container 1, and receiving

ports

3a, 3b, 3c in three directions, respectively, of which two are opposed to each other. T-joint in which the pipe connecting portion 1a is fitted into one of the receiving

ports

3a and 3b, and the gas pipe 2 extending from the container 1 is fitted into the other receiving port 3b through the pipe connecting portion 1a. 3 is provided. With this configuration, the dimension in the height direction perpendicular to the axis of the container 1 can be suppressed as compared with the gas-liquid separator in which the gas pipe is extended from the side wall of the container as in the prior art. For this reason, 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 pass through 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, the gas is provided on the side wall as in the prior art. The pressure resistance of the container 1 can be increased as compared with a container provided with a hole for passing a tube.

Moreover, since there are three places of the receiving

holes

3a, 3b, and 3c of the T-shaped joint 3 to be brazed, only the T-shaped joint 3 is 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 obliquely 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 2. FIG.
FIG. 5 is a cross-sectional view showing a schematic configuration of a gas-liquid separator according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the part similar to Embodiment 1 shown in FIG.
The gas-liquid separator 100 according to the second embodiment includes a container 1 formed in a cylindrical shape, a pipe connecting portion provided at one end in the longitudinal direction of the container 1 and the other end opposite to the one end. 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 the one end portion of the container 1 below the pipe connecting portion 1a so that the pipe port 5a is inclined toward the upstream side in the flow direction of the gas refrigerant. It penetrates and extends straight diagonally upward. By inserting the gas pipe 5 obliquely upward with respect to the container 1, the pipe port 5a is directed to the upstream side with the pipe connecting portion 1a side as the back surface. In addition, the tube port 5 a is located between the longitudinal center of the container 1 and one end of the container 1 and closer to the center of the container 1. A portion of the gas pipe 5 that is 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 connection portion 1b of the container 1, the flow velocity is reduced according to the inner diameter of the container 1 as described above. Of the gas-liquid two-phase refrigerant having a reduced flow velocity, the liquid refrigerant having a high 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 lighter specific gravity than the liquid refrigerant is separated above the liquid refrigerant and flows in the direction of the arrow indicated by the broken line. Thus, the flow mode becomes laminar and the gas-liquid two-phase refrigerant is separated into the gas refrigerant and the liquid refrigerant.

The gas refrigerant is sucked into the pipe port 5a that is inclined obliquely upstream. This is sucked in by the suction force of the compressor. Since the tube port 5a of the gas pipe 5 is directed to the upstream side with the pipe connection portion 1a side as the back surface, the liquid refrigerant that has flowed to the pipe connection portion 1a jumps and drops to the opposite side of the gas refrigerant flow direction. Is not sucked by the pipe opening 5a.

In addition, since the tube port 5a of the gas pipe 5 is located on the pipe connecting part 1a side with respect to the longitudinal center of the container 1, the liquid refrigerant flowing from the pipe connecting part 1b jumps and the liquid droplets of the container 1 Even if it scatters inward, it does not reach the tube opening 5a, but falls before it and is not sucked by the tube port 5a. On the other hand, the liquid refrigerant that has flowed 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 such that the pipe port 5a is inclined toward the upstream side in the flow direction of the gas refrigerant. Among these, it penetrates the hole 6 provided in the site | part below the pipe connection part 1a, and is extended straightly diagonally upward. With this configuration, it is not necessary to bend the distal end side of the gas pipe 5 or to cut the tube port 5a of the gas pipe 5 at an angle, so that the structure is more than that of the gas-liquid separator 100 of the first embodiment. This simplifies the process and facilitates processing, thereby reducing the manufacturing cost.

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.
FIG. 6 is a cross-sectional view for explaining a gas-liquid separator according to Embodiment 3 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 step S4 and step S5. The third embodiment is different from the gas-liquid separator shown in the first embodiment only in part, and only the different parts will be described.

In the gas-liquid separator 100 according to the third embodiment, for example, one recess 3d extending in the axial direction of the receiving port 3b is provided on the inner peripheral wall of the other receiving port 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 that is fitted into the other receiving port 3b of the gas pipe 2.

As shown in FIG. 6, the gas pipe 2 is inserted into the cylindrical member 11 from the end opposite to the tube port 2 a of the gas pipe 2, and the gas pipe 2 penetrates through the pipe connection portion 1 a. Insert into the receptacle 3b. When inserting the gas pipe 2 into the receiving port 3b of the T-shaped joint 3, the pipe port 2a is directed in the opposite direction to the third receiving port 3c of the T-shaped joint 3, and the convex portion 2b of the gas pipe 2 is formed. It inserts in the recessed part 3d provided in the inner peripheral wall of the receptacle 3b. When the convex portion 2 b of the gas pipe 2 is locked by the concave portion 3 d of the T-shaped joint 3, the tube port 2 a of the gas pipe 2 is set to a position between the longitudinal center of the container 1 and one end of the container 1. At the same time, the pipe port 2a is in the opposite direction with respect to the receiving port 3c of the T-shaped joint 3.

As described above, according to the third embodiment, the 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 that is fitted into the concave portion 3d. With this configuration, the tube port 2 a of the gas tube 2 is set at a position between the longitudinal center of the container 1 and one end of the container 1, and the tube port 2 a is connected to the receiving port 3 c of the T-shaped joint 3. Since the state is directed in the opposite direction, the performance variation of the gas-liquid separator 100 due to processing variations can be reduced, and the workability of the gas-liquid separator 100 is also improved.

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

1 container, 1a, 1b pipe connecting part, 2 gas pipe, 2a pipe port, 2b convex part, 3 T-shaped joint, 3a, 3b, 3c receiving port, 3d concave part, 4 gap, 5 gas pipe, 5a pipe port, 6 Hole, 11 cylindrical member, 100 gas-liquid separator.

Claims

In the gas-liquid separator that separates the inflowing gas-liquid two-phase refrigerant into gas refrigerant and liquid refrigerant, and flows out the gas refrigerant and liquid refrigerant, respectively,
A container formed in a cylindrical shape;
A gas pipe provided at one end of both longitudinal ends of the container, and having a pipe port for sucking in the gas refrigerant in the container;
A gas-liquid separator in which the port of the gas pipe is inclined toward the upstream side in the flow direction of the gas refrigerant at a position between the longitudinal center of the container and the one end.
The gas-liquid according to claim 1, wherein the gas pipe in the container is bent at the tip end side, and the tube port at the tip of the gas pipe is formed obliquely toward the upstream side in the flow direction of the gas refrigerant. Separator.
A pipe connection portion provided at each of one end of the container and the other end opposite to the one end;
Each of the three ports has a receiving port, and one of the two receiving ports facing each other is fitted with the pipe connecting portion on the one end side, and the other receiving port has a gas pipe extending from the inside of the container. A T-shaped joint inserted through the pipe connecting portion,
3. The gas-liquid separator according to claim 1, wherein the pipe connection portion on the one end side has an inner diameter larger than an outer diameter of the gas pipe.
The inner peripheral wall of the other receiving port of the T-shaped joint is provided with at least one recessed portion extending in the axial direction of the receiving port, and the recessed portion is inserted into the portion that is inserted into the other receiving port of the gas pipe. Protrusions that are slidably inserted and locked to the recesses are provided,
When the convex portion of the gas pipe is locked by the concave portion of the T-shaped joint, the port opening in the container of the gas pipe is set at a position between the longitudinal center of the container and the one end portion. The gas-liquid separator according to claim 3, wherein the pipe port is directed in the opposite direction with respect to the third receiving port of the T-shaped joint.
2. The gas pipe in the container extends straight and obliquely upward from one end of the container so that a port of the gas pipe is inclined toward the upstream side in the flow direction of the gas refrigerant. Gas-liquid separator.