JPS63247571A - Gas-liquid separator for refrigeration and air cooling - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas-liquid separator for refrigeration and cooling, such as an achimulator and a multi-effect separator.

[Conventional technology]

Accumulators used in refrigeration or cooling cycles are
It is placed between the evaporator 1° and the compressor 8, as shown by symbol 7 in FIG. The vapor refrigerant is temporarily stored so that only the vapor refrigerant can be sucked into the suction port (not shown) of the compressor. 9 is a condenser, and 11 is an expansion fitting groove. Figure 7 shows a conventional example of this type of accumulator.
1 is a refrigerant inlet pipe, 2 is a vapor outlet pipe, and 3 is a container.

In addition, a multi-effect separator used in a refrigeration or cooling cycle includes a first expansion mechanism 13 provided at the outlet of the condenser 9 or a receiver (not shown), and an evaporator, as shown by symbol 12 in FIG. After inhaling the refrigerant which has become a gas-liquid mixed phase by the first expansion mechanism 13, the second expansion mechanism 14 is disposed between the second expansion mechanism 14 and the second expansion mechanism 14 provided at the bottom of the container 10.

The refrigerant is separated into a liquid refrigerant and a vapor refrigerant, and the liquid refrigerant is temporarily stored and then sent to the second expansion mechanism 14.

The vapor refrigerant is sucked into an injection port (not shown) of the compressor 8. FIG. 8 shows a conventional example of this kind of multi-effect separator, in which 1 is a refrigerant inlet pipe, 2' is a steam outlet pipe, 3 is a container, and 6 is a liquid outlet pipe.

[Problem that the invention seeks to solve]

Generally, when the amount of refrigerant circulated during the cooling cycle is large, the flow rate of the gas-liquid multiphase refrigerant flowing into the gas-liquid separator increases, and the liquid refrigerant stored in the gas-liquid separator is vigorously agitated. In conventional gas-liquid separators, this causes forming, large undulations at the gas-liquid interface, and
Or again.

The droplets of liquid refrigerant fly around in the gas phase space, and the liquid refrigerant flows out into the vapor outlet pipe, and is connected to the compressor suction port (in the case of an accumulator) or the compressor injection port (in the case of an accumulator).
In the case of multi-effect separators), there was a high risk of inhalation. When liquid refrigerant is sucked into the compressor in this way, it becomes wet compression or liquid compression, causing problems such as abnormal noise from the compressor, damage to the compressor valve, and a decrease in the efficiency of the cooling cycle. A problem arises in that the cooling capacity is reduced due to On the other hand, if we try to solve this problem and prevent the liquid refrigerant from flowing into the vapor outlet pipe, another problem arises in that the volume of the gas-liquid separator must be increased using the conventional technology. Put it away.

[Failure to solve the problem]

In the gas-liquid separator according to the present invention, a plurality of gas-liquid separation plates are arranged at stepwise intervals in the direction of flow so as to oppose the flow direction of the gas-liquid multiphase refrigerant flowing into one separator. and the open end of the steam outlet pipe is provided directly below the plurality of separation plates.

[Effect]

The flow velocity of the gas-liquid multiphase refrigerant flowing into the gas-liquid separator is relaxed by the gas-liquid separation plate provided along the flow in stages to prevent foaming and the like.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Two embodiments of the present invention will be explained below with reference to drawings.

FIG. 1 shows an embodiment in which the present invention is applied to an accumulator. In this accumulator.

The mechanism related to gas-liquid separation includes a disk-shaped first gas-liquid separation plate 4 and a ring-shaped second gas-liquid separation plate 5 arranged inside the container 3. The upper part of the first gas-liquid separation plate 4.

That is, a refrigerant inlet pipe 1 opening perpendicular to the first gas-liquid separation plate 4 is provided at the center of the upper part of the container.

The refrigerant inlet pipe 1 opens approximately at the center of the top surface of the container. A steam outlet pipe 2 is opened directly below the first gas-liquid separation plate 4 .

The first gas-liquid separation plate 4 is located a few feet to a few feet below the opening end of the inlet pipe 1, maintaining a gap of several 1 from the inner wall on the container side, and perpendicular to the opening end of the inlet pipe 1. It is held on the upper inner surface of the container 3. The second gas-liquid separation plate 5 is placed below the first gas-liquid separation plate 4 and is held in close contact with the inner wall of the container. This second gas-liquid separation plate 5 has a large opening in the center and has a ring shape. The opening diameter of the second gas-liquid separation plate 5 is equal to or slightly smaller than the outer diameter of the first gas-liquid separation plate 4.

The steam outlet pipe 2 passes through the center of the bottom surface of the container 3.

Above the second gas-liquid separation plate 5 and above the first gas-liquid separation plate 4
It opens directly below. Furthermore, in this steam outlet pipe 2,
In consideration of the circulation of lubricating oil, a small diameter hole 30 communicating with the inner bottom space of the container 3 is formed to suck in a small amount of the liquid accumulated in the inner bottom of the container.

The accumulator shown in FIG. 1 can be used as accumulator 7 in FIG. Referring to FIGS. 1 and 4, when the compressor 8 is activated and the refrigeration circuit is activated, the gas-liquid multiphase refrigerant from the evaporator 10 enters the inside of the Achiemlet Tough through the refrigerant inlet pipe 1. It can be introduced. At this time, since the refrigerant inlet pipe 1 is opened to face the first gas-liquid separation plate 4, the inflowing gas-liquid multiphase refrigerant passes through the first gas-liquid separation plate 4.
When it hits, the kinetic energy is relaxed and heated.

Next, the gas-liquid multiphase refrigerant flows downward through the gap between the outer periphery of the first gas-liquid separation plate 4 and the inner wall of the container 3, and collides with the second gas-liquid separation plate 5. When the inflow speed of the gas-liquid multiphase refrigerant is high, the gas-liquid separation is mainly caused by this second gas-liquid separation plate 5, the liquid becomes droplets and falls, and the steam is transferred to the vapor outlet pipe 2. is guided to the compressor 8 from the open end of the . On the other hand, when the inflow speed of the gas-liquid multiphase refrigerant is low, gas-liquid separation is mainly performed by the first gas-liquid separation plate 4. As described above, by using the first and second gas-liquid separation plates 4 and 5, the kinetic energy of the gas-liquid multiphase refrigerant entering the liquid is reduced, thereby preventing forming and splashing of the liquid refrigerant. It can be prevented.

In the above description, the first and second gas-liquid separation plates are separate from each other; however, similar effects can be expected even if the gas-liquid separation plate 40 is integrally constructed as shown in FIG. 2, for example.

In the above embodiment, two gas-liquid separation plates 4.5 are used to perform gas-liquid separation, but in consideration of the inflow speed of the gas-liquid mixed phase refrigerant, three or more gas-liquid separation plates may be used. may also be used. An example is shown in FIG. In this embodiment, the gas-liquid multiphase refrigerant flowing from the refrigerant inlet pipe 1 first hits the upper part of the container 3. The gas-liquid multiphase refrigerant is then passed through the first gas-liquid separation plate 4. Second
Gas-liquid separation plate 5. and the third gas-liquid separation plate 16 in sequence.

Gas-liquid separation is thus performed, the vapor refrigerant flows out through the opening of the vapor outlet pipe 2, and the liquid refrigerant drips downward. In this embodiment, the gas-liquid separation efficiency is equal to or higher than that of the previous embodiment.

It is preferable that the second gas-liquid separation plate 5 is made of a material that has good wettability with the refrigerant. According to this, since the liquid refrigerant can be prevented from bouncing off the separation plate and turning into droplets, the droplets of the liquid refrigerant will not be sucked in from the open end of the vapor outlet pipe 2.

Further, as the second gas-liquid separation plate 5, a structure in which a moisture-absorbing substance is filled between two ring-shaped plate members provided with small-diameter holes or slit-like holes may be used.

According to this, moisture in the refrigerant can be absorbed.

It is also preferable to coat the surfaces of these two ring-shaped plate members with a material that has good refrigerant wettability to prevent splashing of liquid refrigerant.

Up to this point, an example in which the present invention is applied to an accumulator has been described, but it goes without saying that the present invention can also be applied to a hyperactive separator as shown in FIG. In this case, the vapor outlet pipe 2' communicating with the compressor injection component port (not shown) has its open end located above the second gas-liquid separation plate 5 and directly below the first gas-liquid separation plate 4. It is set up in Second
A liquid outlet pipe 6 communicating with the expansion mechanism has its open end located in the lowest space inside the container 3.

〔Effect of the invention〕

As described above, in the gas-liquid separator according to the present invention (1), a plurality of gas-liquid separation plates are arranged so as to overflow in the direction of flow of the gas-liquid multiphase refrigerant flowing into the separator, so as to counteract the flow direction of the gas-liquid multiphase refrigerant. Arranged at gradual intervals.

Since the open end of the vapor outlet pipe is provided directly below the plurality of separation plates, the flow rate of the gas-liquid multiphase refrigerant flowing into the gas-liquid separator is
The gas-liquid separation plate alleviates this problem and prevents forming and splashing of liquid refrigerant. Moreover, gas-liquid separation can be facilitated in a space-saving manner. It also prevents the liquid refrigerant that accumulates at the bottom of the container from forming and splashing, and prevents the liquid refrigerant from flowing into the compressor, making it possible to eliminate various problems caused by liquid compression and wet compression. Become.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of an akinimulator according to an embodiment of the present invention. FIG. 2 shows a gas-liquid separation plate used in an akinimulator according to another embodiment of the present invention, in which (a) is a plan view and (b) is a front view. FIG. 3 is a longitudinal sectional view of an akinimulator according to still another embodiment of the present invention. FIG. 4 is a longitudinal sectional view of a multi-effect separator according to still another embodiment of the present invention. FIG. 5 is a block diagram showing a general refrigeration cycle using an accumulator. FIG. 6 is a block diagram showing a general refrigeration cycle using a multi-effect separator. 7th
The figure is a longitudinal sectional view of a conventional accumulator. FIG. 8 is a longitudinal sectional view of a conventional multi-effect separator. In the figure, 1: refrigerant inlet pipe, 2: vapor outlet pipe, 3: container,
4: First gas-liquid separation plate, 5: Second gas-liquid separation plate, 6: Liquid outlet pipe, 7: Akie emulator, 8: Compressor, 9: Condenser, 10: Evaporator, 11: Expansion mechanism, 12: Hyperactive separator,
13: First expansion mechanism. 14: second expansion mechanism, 15: lubricating oil return passage. 16: Third gas-liquid separation plate. Figure 1 Figure 3 Figure 7 ↓

Claims (8)

[Claims] (1) Providing an inlet section for guiding the gas-liquid multiphase refrigerant flowing in from the outside into the closed container, and a vapor outlet pipe having an open end in the internal space of the container for discharging the steam inside the closed container to the outside;
In a gas-liquid separator for refrigeration and cooling, which separates gas-liquid multiphase refrigerant flowing into the width of a sealed container into vapor and liquid, multiple The gas-liquid separation plates are arranged in stages at intervals along the flow direction of the refrigerant, and the open end of the vapor outlet pipe is provided directly below any one of the plurality of gas-liquid separation plates. A gas-liquid separator for refrigeration and air conditioning, featuring: (2) The plurality of gas-liquid separators are arranged with a gap of several mm from the inner wall surface of the gas-liquid separator so as to cross the flow of the gas-liquid multiphase refrigerant flowing downward from the upper part of the gas-liquid separator. is arranged below the first gas-liquid separation plate, is in close contact with the inner wall surface of the gas-liquid separator, and has a diameter smaller than or equivalent to that of the first gas-liquid separation plate in the center. a second gas-liquid separation plate having an opening and substantially parallel to the first gas-liquid separation plate;
A gas-liquid separator for freezing and cooling according to claim (1), which opens directly below the gas-liquid separator plate. (3) The gas-liquid separator for freezing and cooling according to claim (1), wherein the plurality of gas-liquid separation plates have an integral structure. (4) A gas-liquid separator for freezing and cooling according to claim (1), wherein at least one gas-liquid separation plate among the plurality of gas-liquid separation plates is made of a material with good wettability. . (5) At least one of the plurality of gas-liquid separation plates includes a plurality of plate members having a large number of holes, and a material with good wettability sandwiched between these plate members. The refrigeration method according to claim (1), which includes the
Gas-liquid separator for cooling. (6) The hole in the plate member is a round hole.
5) Gas-liquid separator for freezing and cooling. (7) A gas-liquid separator for freezing and cooling according to claim (5), wherein the hole in the plate member is in the form of a slit. (8) A gas-liquid separator for freezing and cooling according to claim (5), wherein the surface of the plate member is coated with a material having good wettability.