JPH04366377A - Gas-liquid separator - Google Patents

Abstract

PURPOSE:To bring liquid refrigerant in contact with a heater constantly even when there remains a small amount of liquid in a gas-liquid separator. CONSTITUTION:There are laid out a refrigerant inlet port 2a and a gas outlet port 23a in the upper part of a casing 21 while there are laid out a liquid outlet port 24a and a heating section 31 in the lower part. A liquid collection funnel 26 is housed in the lower part of the refrigerant inlet port 22a. The heating section 31 is vertically installed at a position located below a flow outlet port 28 of the liquid collection funnel 26. The liquid refrigerant flows down in the liquid collection funnel 26 and it is collected in the flow outlet port 28 and further drops along the heating section 31.

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 with a built-in heater used in air conditioners and the like, and more particularly to measures to prevent overheating of the heater.

0002

2. Description of the Related Art A gas-liquid separator with a built-in heater is known, for example, as disclosed in Japanese Unexamined Patent Publication No. 120061/1983, which is used in air conditioners. The heater is built-in for the purpose of improving heating capacity, etc.
This evaporates liquid refrigerant and increases the amount of gas refrigerant returned to the compressor via the injection path.

0003

[Problem to be Solved by the Invention] However, in the gas-liquid separator disclosed in the above publication, no measures are taken in the case where the liquid level drops below the heater, so the amount of liquid flowing into the vessel is small. Sometimes the problem is that the heater overheats and burns out. In other words, when the piping between the outdoor heat exchanger and the indoor heat exchanger is long, the amount of liquid refrigerant stagnant in the piping is As a result, the amount of liquid refrigerant flowing into the gas-liquid separator decreases, and overheating of the heater becomes a problem.

[0004] The present invention has been made in view of this point, and an object of the present invention is to constantly bring the heater into contact with the liquid even when the amount of liquid in the gas-liquid separator is small.

[0005]

[Means for Solving the Problems] In order to achieve the above object, the means taken by the present invention are to cause liquid fluid to flow down along the heating section, or to provide a liquid reservoir around the heating section. It is designed to be immersed in water.

Specifically, the means taken by the invention according to claim 1 is that, as shown in FIG. 2, a fluid inlet (22a) is provided in the upper part of the casing (21), A liquid collection funnel (26) into which the fluid is poured is accommodated below the fluid inlet (22a) in the interior of the liquid collection funnel (26), and a flow outlet (28) at the lower end of the liquid collection funnel (26) is used to vaporize the liquid fluid. A heating part (31) is disposed in the casing (21), and a liquid outlet is provided at a position below the liquid collection funnel (26) for discharging the liquid fluid that has flowed down along the heating part (31). (24a) has a configuration in which a gas outlet (23a) for a gas fluid is disposed above the liquid collection funnel (26).

The means taken by the invention according to claim 2 are shown in FIG.
As shown in the figure, a fluid inlet (22a) and a gas outlet (23a) are provided in the upper part of the casing (21), and the fluid is poured below the inlet (22a) for the two-phase flow. A shelf board (33) is formed, a proximal end of the shelf board (33) is joined to the inner surface of the casing (21), and a distal end extends inward from the proximal end. A gutter-like liquid reservoir for a heating section (34) is formed at the tip, and a heating section (31) for vaporizing liquid fluid is formed in the liquid reservoir for a heating section (34).
is arranged in the casing (2) below the shelf board (33).
1) is provided with a liquid outlet (24a) for discharging the liquid flowing down from the shelf plate (33).

The means taken by the invention according to claim 3 are shown in FIG.
As shown in the figure, the casing (21) is formed horizontally;
A fluid inlet (22a) is provided in the upper part of the casing (21).
and a gas outlet (23a) are disposed in the casing (21), located below the fluid inlet (22a), and having an open upper surface facing the fluid inlet (22a).
A concave heating section liquid reservoir (34) into which fluid is poured is provided on the body wall (21b) of the casing (21), and a heating section liquid reservoir (34) is provided with a concave heating section liquid reservoir (34) for vaporizing the liquid fluid. heating section (
31) is disposed, and a liquid outlet (24a) for discharging liquid fluid overflowing from the heating section liquid reservoir (34) is disposed at the lower part of the casing (21). ing.

The means taken by the invention according to claim 4 are shown in FIG.
As shown in , the casing (21) is formed vertically,
A fluid inlet (22a) is provided in the upper part of the casing (21).
and a gas outlet (23a) are disposed in the casing (21), located below the fluid inlet (22a), and having an open upper surface facing the fluid inlet (22a).
A recessed heating section liquid reservoir (34) into which fluid is poured is provided on the bottom wall (21c) of the casing (21), and a heating section liquid reservoir (34) is provided in the heating section liquid reservoir (34) for vaporizing the liquid fluid. heating section (
31) is disposed, and a liquid outlet (24a) for discharging liquid fluid overflowing from the heating section liquid reservoir (34) is disposed at the lower part of the casing (21). There is.

The means taken by the invention according to claim 5 are shown in FIG.
As shown in the figure, the casing (21) is formed horizontally;
Inside the casing (21), there is a cylindrical liquid flow part (37) whose base end is fixed to one end wall (21d) of the casing (21) and whose tip is open and extends in the longitudinal direction of the casing (21). A fluid inlet (22a) is provided at the base end of the liquid flow section (37), and a fluid flow inlet (22a) is provided at the base end of the liquid flow section (37).
A heating part (31) for vaporizing liquid fluid is disposed within the liquid flow part (37), and below the liquid flow part (37)
7) Liquid outlet (24a) for discharging liquid fluid flowing out from
The configuration is such that

The means taken by the invention according to claim 6 are shown in FIG.
As shown in , the casing (21) is formed vertically,
Inside the casing (21), a cylindrical liquid flow section (37) whose base end is fixed to the bottom wall (21c) of the casing (21) and whose tip is open is provided. A fluid inlet (22a) is opened at the base end of the liquid flow section (37), and a heating section (31) for vaporizing the liquid fluid is provided within the liquid flow section (37). A liquid outlet (24a) is disposed outside of the liquid flow section (37) for discharging the liquid fluid that has flowed out from the liquid flow section (37).

The means taken by the invention according to claim 7 are as shown in FIG.
As shown in FIG. 2, a fluid inlet (22a) and a gas outlet (23a) are provided in the upper part of the casing (21), and a rod-shaped rod is provided for vaporizing liquid fluid from the lower inner surface of the casing (21). A heating part (31) is installed upright, and a spiral liquid flow body (38) is interposed between the casing (21) and the heating part (31), and the flow of the liquid flow body (38) is The lower surface (39) is inclined downward from the center, while the inner peripheral edge of the liquid flow body (38) is aligned with the outer periphery of the heating section (31).
The outer peripheral edge is in close contact with the inner surface of the casing (21), and the liquid flowing down the flow surface (39) is discharged into the casing (21) on the lower outer side of the liquid flow body (38). The structure is such that a liquid outlet (24a) is provided.

The means taken by the invention according to claim 8 are shown in FIG.
As shown in 1, a fluid inlet (22a) and a gas outlet (23a) are provided at the upper part of the casing (21),
A rod-shaped heating part (31) for vaporizing liquid fluid is erected from the lower part of the casing (21), and
A spiral liquid flow body (
38) is interposed, and the flow surface (39) of the liquid flow body (38) is interposed.
) is tilted downward from the center, while the liquid flow body (
38) has a predetermined distance from the outer periphery of the heating part (31), and the outer periphery is in close contact with the inner surface of the casing (21), and the outer periphery of the lower part of the liquid flow body (38) A liquid outlet (24a) is provided inside the casing (21) for discharging the liquid fluid that has flowed down the downstream surface (39).

The means taken by the invention according to claim 9 are shown in FIG.
3, a fluid inlet (22a) and a gas outlet (23a) are provided at the upper part of the casing (21), while a liquid fluid is vaporized from the lower inner surface of the casing (21). A rod-shaped heating part (31) is erected, and a spiral liquid flow body (38) into which fluid is poured is joined to the outer periphery of the heating part (31). Flowing surface (
39) is inclined downward from the center, while a liquid outlet (39) is provided in the lower outer casing (21) of the liquid flow body (38) for discharging the liquid fluid that has flowed down the flow surface (39). 24a) is arranged.

[0015]

[Operation] With the above structure, according to the invention according to claim 1, the fluid flowing into the casing (21) is poured into the liquid collection funnel (26) and gas and liquid are separated. The liquid fluid flows down the liquid collection funnel (26) and is collected at the outlet (28) and flows further down along the heating section (31). The separated gas and the gas vaporized by the heating section (31) while flowing down are discharged from the gas outlet (23a), respectively. On the other hand, the liquid that has reached the lower part of the casing (21) is discharged from the liquid outlet (24a).

According to the second aspect of the invention, the fluid that has flowed into the casing (21) is poured onto the shelf plate (33), and gas and liquid are separated. The liquid fluid is stored in the heating section liquid reservoir (34) of the shelf board (33), and the heating section (31) is always immersed in the liquid fluid. The separated gas and the gas vaporized by the heating section (31) are transferred to the gas outlet (
23a) respectively. On the other hand, the casing (
21) The liquid fluid that has reached the lower part is discharged from the liquid outlet (24a).

Similarly, according to the third and fourth aspects of the invention, the heating section liquid reservoir (34) receives the fluid poured into the casing (21) and stores the liquid fluid. The stored liquid fluid is vaporized by the heating section liquid reservoir (34), while the overflowing liquid fluid flows down to the liquid outlet (24a).
more excreted. Therefore, the heating part (31) is always immersed in the liquid fluid.

According to the fifth and sixth aspects of the present invention, the liquid fluid is directly supplied into the liquid flow portion (37) from the fluid inlet (22a), and the liquid fluid flows toward the opening. Therefore, the heating part (
31) will be constantly immersed in the flowing liquid fluid.

According to the invention according to claim 7, the fluid that has flowed into the casing (21) is separated while flowing through the liquid flow body (38), and the liquid fluid flows down the flow surface (39) to the center side. and flows down in a spiral along the outer periphery of the heating section (31). The gas separated and vaporized during the flow rises through the spiral space within the liquid flow body (38) and passes through the gas outlet (23).
a) Excreted from. On the other hand, the liquid that has reached the lower part of the casing (21) is discharged from the liquid outlet (24a).

According to the invention according to claim 8, the flow surface (3
The liquid fluid collected at the center of the heating section 9) is poured into the heating section (31) spaced apart from each other by a predetermined distance, and flows down along the heating section (31). The separated and vaporized gas rises through the spiral space within the liquid flow body (38) and the gap between the liquid flow body (38) and the heating section (31).

According to the invention according to claim 9, the liquid flowing body (
The liquid fluid separated while flowing through the heating section (38) flows down the flow-down surface (39), gathers at the center, and flows down spirally along the outer periphery of the heating section (31), while the separated and vaporized gas rises inside the casing (21).

[0022]

As described above, according to the invention as claimed in claim 1, the liquid collection funnel (26) always keeps the liquid flowing along the heating section (31) even when the amount of liquid in the gas-liquid separator is small. The liquid fluid can be caused to flow down, and it is possible to prevent the heating part (31) from overheating, not only during startup and defrost operation, but also when the piping between the outdoor heat exchanger and the indoor heat exchanger is long.
31) can be prevented from burning out.

Further, according to the invention according to claim 2, the liquid fluid flowing down the shelf board (33) flows into the heating section liquid reservoir (3) at the tip.
4), the evaporating heating part (31) can be immersed in the liquid fluid, thereby preventing the heating part (31) from overheating and further burning out the heating part (31). Can be done.

Similarly, according to the inventions according to claims 3 and 4, the liquid poured into the casing (21) is received by the liquid reservoir for the heating section (34) and the liquid is stored. , overheating of the heating section (31), and further heating section (3
1) Burnout can be prevented.

According to the inventions according to claims 5 and 6, the heating part (31) is immersed in the liquid fluid flowing in the liquid flow part (37), so that the heating part (31) is overheated and further Burnout of the heating section (31) can be prevented.

Furthermore, according to the invention according to claims 7 to 9, the liquid flowing body (38) can cause the liquid fluid to flow down along the outer periphery of the heating part (31), and the liquid flowing down the heating part (31). Overheating and even burnout of the heating section (31) can be prevented.

[0027]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the invention according to claim 1 will be described below with reference to the drawings.

FIG. 1 shows a refrigerant circuit of an air conditioner in which the gas-liquid separator of the present invention is applied to the air conditioner. The refrigerant circuit (1) includes a compressor (2), a four-way switching valve (3) that switches as shown in the solid line in the figure during heating operation and as shown in the broken line in the figure during cooling operation, and an indoor heat exchanger (4).
), a gas-liquid separator (5), an electric expansion valve (6), an outdoor exchanger (7), and an accumulator (8) are provided as main equipment. During heating, the indoor heat exchanger (4) functions as a condenser and the outdoor heat exchanger (7) functions as an evaporator. During cooling, the indoor heat exchanger (4) functions as an evaporator and the outdoor heat exchanger (7) functions as an evaporator. ) acts as a condenser.

Indoor heat exchanger (4) and outdoor heat exchanger (
A bridge circuit (11) is interposed between the bridge circuit (11) and the bridge circuit (11), and the bridge circuit (11) has four check valves (12), (12)... arranged as shown in Fig. 1. A gas-liquid separator (5) and an electric expansion valve (6) are connected in series between points a and b of the bridge circuit (11). This bridge circuit (11) allows the refrigerant to flow from the upstream heat exchanger to the gas-liquid separator (5) in both cooling and heating operations.
) and separated by the gas-liquid separator (5), the liquid refrigerant is configured to flow through the electric expansion valve (6) to the heat exchanger on the downstream side. Note that the liquid refrigerant flowing into the bridge circuit (11) at point b flows to the downstream side because the pressure is high on the upstream side.

[0030] Also, the gas outlet (2) of the gas-liquid separator (5)
An injection path (13) is interposed between the suction port (not shown) of the compressor (2) and the gas-liquid separator (5). The recycled gas refrigerant is returned to the compressor (2).

The gas-liquid separator (5) is a feature of the present invention, and as shown in FIG.
is constructed into a cylindrical airtight container, and the casing (2
1) is formed vertically. A refrigerant inflow pipe (22) is connected to the top wall (21a) of the casing (21).
1), and a refrigerant inlet (22a) is opened. In addition, there is a gas outlet (23a) at the top of the trunk wall (21b).
A gas outflow pipe (23) forming a liquid outflow port (24a) is disposed at the bottom of the body wall (21b), and a liquid outflow pipe (24) forming a liquid outflow port (24a) is provided at the bottom of the body wall (21b). Furthermore, the refrigerant inflow pipe (22)
A liquid collection funnel (26) is housed below. The refrigerant inflow pipe (22) is connected to point a of the bridge circuit (11), and the gas outflow pipe (23) is connected to the injection path (13).
In addition, the liquid outflow pipes (24) are respectively connected to electric expansion valves (6).

The upper edge of the liquid collection funnel (26) is in close contact with the body wall (21b) of the casing (21), while the side wall (26) is in close contact with the body wall (21b) of the casing (21).
26a) is provided with a gas refrigerant flow hole (27), and the lower end thereof is provided with a liquid refrigerant flow port (28).

On the other hand, the outlet (28) of the liquid collection funnel (26)
) A rod-shaped heating part (31) for vaporizing the liquid refrigerant is erected on the bottom wall (21c) directly below the heating part (31).
is inserted into the liquid collection funnel (26) through the outlet (28). Moreover, an electric heater is built in the heating section (31).

Next, the operation of the air conditioner will be explained.

During heating operation of the air conditioner, the four-way switching valve (3) switches to the solid line side in the figure, and the high-pressure gas refrigerant discharged from the compressor (2) is transferred to the indoor heat exchanger (4). is condensed in the indoor heat exchanger (4) to become a gas-liquid two-phase flow, which passes through point a of the bridge circuit (11) to the gas-liquid separator (5).
). The gas-liquid two-phase flow is separated by a gas-liquid separator (5), and the separated liquid refrigerant is depressurized by an electric expansion valve (6).
It heads to the right piping, which has a lower pressure than point b of the bridge circuit (11), and flows into the outdoor heat exchanger (7). The liquid refrigerant is evaporated in the outdoor heat exchanger (7), removed in the accumulator (8), and then sucked into the compressor (2). On the other hand, the gas refrigerant separated by the gas-liquid separator (5) passes through the injection path (13),
It is returned to the compressor (2).

[0036] Also, during cooling operation, the four-way switching valve (3)
is switched to the side of the broken line in the figure, and the flow is opposite to that during the heating operation described above.

[0037] During heating operation, electricity is supplied to the heating section (31) for the purpose of improving the heating capacity. However, in addition to during startup and defrost operation, the indoor heat exchanger (4) and outdoor heat exchanger (7)
When the amount of liquid refrigerant remaining in the pipe is large, such as when the pipe between the gas and liquid separator (5) is long, there will be a shortage of liquid refrigerant flowing into the gas-liquid separator (5).

The operation of the gas-liquid separator (5) will now be explained.

[0039] From the refrigerant inlet (22a), the casing (2
1) The gas-liquid two-phase flow of the refrigerant flowing into the liquid collection funnel (26
), the gas-liquid specific gravity difference and the liquid collection funnel (26
), and the separated liquid refrigerant is collected at the outlet (28) at the lower end of the liquid collecting funnel (26) and flows down along the heating section (31). Therefore, the heating part (31) is always in contact with the liquid refrigerant, and vaporization of the liquid refrigerant and cooling of the heating part (31) are reliably performed. Heating part (31)
The gas refrigerant vaporized by the heating part (31) while flowing down passes through the flow hole (27) and rises, and is discharged from the gas outlet (23a) together with the previously separated gas. On the other hand, the liquid refrigerant that has reached the lower part of the casing (21) flows through the liquid outlet (24).
a) Excreted from.

[0040] Therefore, the liquid collection funnel (26)
In addition to during startup and defrost operation, the indoor heat exchanger (4)
When the piping between the and outdoor heat exchanger (7) is long,
Even when the amount of liquid refrigerant in the gas-liquid separator (5) is small, the liquid can always flow down along the heating section (31), and overheating of the heating section (31) can be prevented. burnout can be prevented.

Next, FIGS. 3 and 4 show a second embodiment of the invention according to claim 2, FIG. 5 shows a third embodiment of the invention according to claim 2, and FIG. 6 shows a third embodiment of the invention according to claim 2. A fourth example is shown below. These second to fourth embodiments are a gas-liquid separator (
5) A liquid reservoir is provided around the heating part (31), and the heating part (31) is immersed in the liquid refrigerant.

First, in a second embodiment of the invention according to claim 2, as shown in FIGS. 3 and 4, the separator (5) has a casing (21) formed in a cylindrical closed container, and ,
It is formed horizontally. Shell wall (2) of casing (21)
1a) At the top, there is a refrigerant inflow pipe (22) and a gas outflow pipe (22).
3) penetrates into the casing (21).

A shelf plate (33) is provided inside the casing (21) below the refrigerant inlet pipe (22). The shelf board (33) has a proximal end connected to the trunk wall (21) of the casing (21).
b) and both end walls (21d) and (21e), a distal end extending inward from the base end, and a gutter-shaped heating section formed in an upward curve at the distal end; liquid reservoir (34
) is formed.

[0044] A heating part (
31) is provided, and the heating section (31) is connected to a shelf board (33).
The liquid refrigerant flows down and is immersed in the liquid refrigerant stored in the heating section liquid reservoir (34). In addition, a liquid outflow pipe (24) penetrates from the upper part of the body wall (21b) and a liquid outflow port (24a) opens below the shelf board (33), and the liquid refrigerant is heated by the action of the high pressure of the gas refrigerant. The liquid flows into the liquid outflow pipe (24) and rises.

[0045] Therefore, the gas-liquid two-layer flow of the refrigerant that has entered the casing (21) is poured onto the shelf plate (33),
Gas and liquid are separated. The separated liquid refrigerant is stored in the heating section liquid reservoir (34) of the shelf board (33), and the heating section (31) is always immersed in the liquid refrigerant. The separated gas refrigerant and the gas refrigerant vaporized by the heating section (31) are discharged from the gas outlet (23a), respectively. On the other hand,
The liquid refrigerant that has flowed down the shelf plate (33) and reached the lower part of the casing (21) is discharged from the liquid outlet (24a).

According to this embodiment, the heating section liquid reservoir section (3
4) allows the heating part (31) to be immersed in the liquid refrigerant, and can be used not only during startup and defrost operation, but also during piping between the indoor heat exchanger (4) and the outdoor heat exchanger (7). Even when the amount of liquid refrigerant in the gas-liquid separator (5) is small, overheating of the heating section (31) can be prevented.
) can be prevented from burning out.

Furthermore, the third embodiment of the invention according to claim 3 and the fourth embodiment of the invention according to claim 4 are a gas-liquid separator (5
) is provided with a heating section liquid reservoir (34) in which the heating section liquid reservoir (34) receives and stores the liquid refrigerant poured into the casing (21). Part (34)
A heating section (31) is disposed inside.

A third embodiment of the invention according to claim 3 is shown in FIG.
As shown in the casing (21) of the gas-liquid separator (5)
is formed in a horizontally elongated manner, and a gas outflow pipe (23) is disposed at the upper part of the trunk wall (21b). The liquid outflow pipe (24) is connected to the body wall (
A liquid outlet (24a) penetrates from the upper part of the casing (21b) and opens at the lower part of the casing (21). Torso wall (21b
) is provided with a heating section liquid reservoir section (34) that is configured with a conical peripheral wall (36). A heating section (31) is disposed within the heating section liquid reservoir (34), and a refrigerant flows into the upper part of the body wall (21b) facing the opening of the heating section liquid reservoir (34). The refrigerant inlet (22a) of the pipe (22) is open.

According to this embodiment, the casing (21)
The gas-liquid two-phase flow of refrigerant poured into the heating section liquid reservoir (
34) receives and stores the liquid refrigerant. The stored liquid refrigerant is vaporized by the heating section liquid reservoir (34) and rises, while the overflowing liquid refrigerant flows down and is discharged from the liquid outlet (24a). Therefore, when starting up, etc., the gas-liquid separator (5)
The heating part (31) is always immersed in the stored liquid refrigerant even when the amount of liquid refrigerant in the heating part (31) is small.
1) overheating and further burnout of the heating section (31) can be prevented.

Next, in a fourth embodiment of the invention according to claim 4, as shown in FIG. 6, the gas-liquid separator (5) is placed vertically, and the bottom wall ( A heating section liquid reservoir (34) is provided in the heating section liquid reservoir (34), and the upper part of the heating section (31) disposed in the heating section liquid reservoir (34) is provided in the heating section liquid reservoir (34). ) more prominent. The other configurations are the same as in the third embodiment. Therefore, in this embodiment, as in the third embodiment, the gas-liquid separator (5)
Even when the amount of liquid refrigerant in the heating section (31) is small,
Furthermore, burnout of the heating section (31) can be prevented.

Next, FIG. 7 shows a fifth embodiment of the invention according to claim 5, and FIG. 8 shows a sixth embodiment of the invention according to claim 6. In the fifth embodiment and the sixth embodiment, the heating section (31) is immersed in the liquid flowing through the liquid flow section (37).

A fifth embodiment of the invention according to claim 5 is shown in FIG.
As shown in the figure, the gas-liquid separator (5) is formed horizontally, and the base end is fixed to one end wall (21d) of the casing (21), and the distal end is a cylindrical liquid flower with an open end. Part (3
7) is arranged in the longitudinal direction of the casing (21), and a refrigerant inlet (22a) is provided at the base end of the liquid flow section (37). The other end wall (21e) has a rod-shaped heating part (
31) is protruded into the casing (21), and the liquid flow part (
The heating section (31) is inserted into the liquid flow section (37) through the opening of the
) has been inserted.

[0053] The distal end of the liquid flow portion (37) is cut off at the portion facing the upper gas outflow pipe (23). Thereby, the gas refrigerant vaporized within the liquid flow section (37) can be made easier to flow out from the inside.

According to this embodiment, the refrigerant inlet (22a
), the liquid refrigerant is directly supplied into the liquid flow section (37), and the liquid refrigerant flows toward the opening. Therefore, the heating part (31) inserted into the cylindrical liquid flow part (37) is always immersed in the liquid refrigerant flowing, and the liquid refrigerant in the gas-liquid separator (5) during startup etc. Even when the amount of refrigerant is low, the heating section (3
1) overheating and further burnout of the heating section (31) can be prevented.

Next, in a sixth embodiment of the invention according to claim 6, the gas-liquid separator (5) is formed vertically as shown in FIG. The same is true. Therefore, in this embodiment as well, as in the third embodiment, overheating of the heating section (31) and further burnout of the heating section (31) can be prevented.

Next, a seventh embodiment of the invention according to claim 7 is shown in FIGS. 9 and 10. In this embodiment, the heating section (31
) A liquid flow body (38) for causing liquid refrigerant to flow downward is provided on the outer periphery of the heating section (31).

That is, the bottom wall (2
A rod-shaped heating part (31) is erected from 1c), and a spiral liquid flow body (38) is interposed between the body wall (21b) of the casing (21) and the heating part (31). There is. The downstream surface (39) of the liquid downstream body (38) is inclined downward from the center, and the inner peripheral edge of the liquid downstream body (38) is on the outer periphery of the heating section (31), and the outer peripheral edge is on the inner surface of the casing (21). It's in close contact.

A refrigerant inflow pipe (22) penetrates the ceiling wall (21a), while a gas outlet (23a) is provided in the upper part of the body wall (21b) of the casing (21), allowing the liquid to flow through the lower body (3).
There is a liquid outlet (2) in the lower outer casing (21) of 8).
4a) are arranged respectively.

As the liquid flow body (38), a heat conductor such as metal is used, preferably a good heat conductor such as copper. Thereby, vaporization of the liquid refrigerant on the downstream surface (39) can be promoted.

Therefore, the gas-liquid two-layer flow of the refrigerant that has flowed into the casing (21) is separated while flowing through the liquid flow lower body (38), and the liquid refrigerant flows down the flow lower surface (39) and collects at the center side. , flows down spirally along the outer periphery of the heating section (31). The gas separated and vaporized during the flow becomes the liquid flow body (3
8) ascends through the spiral space inside the gas outlet (23a).
more excreted. On the other hand, the liquid that has reached the lower part of the casing (21) is discharged from the liquid outlet (24a).

According to this embodiment, even when the amount of liquid refrigerant in the gas-liquid separator (5) is small, such as during startup, the liquid flowing body (3
8) allows the liquid refrigerant to flow down along the outer periphery of the heating section (31), thereby preventing overheating of the heating section (31) and further burning out of the heating section (31).

Next, FIG. 11 and FIG. 12 show an eighth embodiment of the invention according to claim 8. This example uses a liquid flow body (
The inner circumferential edge of the heating part (38) has a predetermined distance from the outer circumference of the heating part (31), and the other configurations are the same as in the seventh embodiment.

According to this embodiment, the liquid refrigerant gathered on the center side of the downstream surface (39) is heated by the heating section (39) separated by a predetermined distance.
1) and flows down along the heating section (31). The separated and vaporized gas refrigerant ascends through the spiral space within the liquid flow body (38) and the gap between the liquid flow body (38) and the heating section (31). Therefore, in this example as well, the seventh
The same effects as in the embodiment can be achieved.

Next, a ninth embodiment of the invention according to claim 9 is shown in FIGS. 13 and 14. This example uses a liquid flow body (
39) and the trunk wall (21b) of the casing (21). That is, a spiral liquid flow body (38) is joined to the outer periphery of the heating part (31), and the liquid refrigerant separated while flowing through the liquid flow body (38) is transferred to the flow surface (39).
The gas refrigerant flows down, gathers at the center, and flows down spirally along the outer periphery of the heating section (31), while the separated and vaporized gas refrigerant rises inside the casing (21) and flows through the gas outlet (
23a).

Therefore, this embodiment can also exhibit the same effects as the seventh embodiment.

[0066] The gas-liquid separator (5) according to the present invention is
It can be applied to air conditioners other than the refrigerant circuits described above, and can also be used for purposes other than air conditioners.

Furthermore, the refrigerant flowing into the gas-liquid separator (5) is not limited to a gas-liquid two-layer flow, but may be only a liquid refrigerant.

[0068] Furthermore, in the above embodiment, the heating section (31
), or in which the heating part (31) is immersed in the liquid reservoir, the entire outer surface of the heating part (31) is in contact with the liquid refrigerant. It does not need to be there, and may be part of the outer surface.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a refrigerant circuit of an air conditioner according to a first embodiment of the present invention.

FIG. 2 shows a first embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

FIG. 3 shows a second embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

FIG. 4 is a longitudinal cross-sectional view taken along line A-A in FIG. 3;

FIG. 5 is a partially cutaway perspective view of a gas-liquid separator, showing a third embodiment of the present invention.

FIG. 6 shows a fourth embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

FIG. 7 is a partially cutaway perspective view of a gas-liquid separator, showing a fifth embodiment of the present invention.

FIG. 8 shows a sixth embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

FIG. 9 shows a seventh embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

FIG. 10 is a longitudinal sectional view taken along the line BB in FIG. 9;

FIG. 11 shows an eighth embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

FIG. 12 is a vertical cross-sectional view taken along line CC in FIG. 11;

FIG. 13 shows a ninth embodiment of the present invention, and is a perspective view taken along the center of the gas-liquid separator.

14 is a vertical cross-sectional view taken along line DD in FIG. 11. FIG.

[Explanation of symbols]

21 Casing 22a Refrigerant inlet (fluid inlet) 23a Gas outlet 24a Liquid outlet 26 Liquid collection funnel 28 Liquid collection funnel outlet 31 Heating part 33 Shelf board 34 Liquid reservoir for heating section 36 Peripheral wall of heating section 37 Liquid distribution section 38 Liquid flowing body 39 Flowing surface of liquid flowing body

Claims (9)

[Claims] 1. A fluid inlet (22a) is disposed in the upper part of the casing (21), and a liquid collection funnel into which fluid is poured below the fluid inlet (22a) in the casing (21). (26) is housed and the liquid collection funnel (
A heating section (31) for vaporizing the liquid fluid is disposed at the downstream port (28) at the lower end of the casing (26).
) is provided with a liquid outlet ( ) for discharging the liquid fluid that has flowed down along the heating section (31) at a position below the liquid collection funnel (26).
A gas-liquid separator 24a), characterized in that gas outlet ports (23a) for a gas fluid are disposed above the liquid collection funnel (26). 2. A fluid inlet (22a) and a gas outlet (23a) are provided in the upper part of the casing (21),
A shelf plate (33) into which the fluid is poured is formed below the two-phase flow inlet (22a), and a base end of the shelf plate (33) is joined to the inner surface of the casing (21), A distal end extends inward from the proximal end, and a gutter-shaped heating section liquid reservoir (34) is formed in the distal end. is a heating section (31) for vaporizing liquid fluid.
) is arranged, and the casing (
21) A gas-liquid separator characterized in that a liquid outlet (24a) for discharging the liquid fluid flowing down from the shelf plate (33) is disposed in the interior thereof. 3. A casing (21) is formed horizontally, and a fluid inlet (22a) is provided in an upper part of the casing (21).
) and a gas outlet (23a) are disposed in the casing (21), and the upper surface facing the fluid inlet (22a) is open and is located below the fluid inlet (22a). A concave heating section liquid reservoir (34) into which the fluid is poured is provided on the body wall (21b) of the casing (21), and the heating section liquid reservoir (34) is provided with a concave heating section liquid reservoir (34) for vaporizing the liquid fluid. A heating part (31) is provided at the lower part of the casing (21), and a liquid outlet (24a) is provided at the lower part of the casing (21) for discharging the liquid fluid overflowing from the heating part liquid reservoir (34). A gas-liquid separator characterized by: 4. A casing (21) is formed vertically, and a fluid inlet (22a) is provided in an upper part of the casing (21).
) and a gas outlet (23a) are disposed in the casing (21), and the upper surface facing the fluid inlet (22a) is open and is located below the fluid inlet (22a). A concave heating section liquid reservoir (34) into which fluid is poured is provided on the bottom wall (21c) of the casing (21), and the heating section liquid reservoir (34) is provided with a concave heating section liquid reservoir (34) for vaporizing the liquid fluid. A heating part (31) is provided at the bottom of the casing (21), and a liquid outlet (24a) is provided at the lower part of the casing (21) for discharging the liquid fluid overflowing from the heating part liquid reservoir (34). A gas-liquid separator characterized by: 5. A casing (21) is formed horizontally, and inside the casing (21), the casing (21)
A cylindrical liquid flow part (37) whose base end is fixed to one end wall (21d) and whose tip is open is arranged in the longitudinal direction of the casing (21), and the base of the liquid flow part (37) is arranged in the longitudinal direction of the casing (21). A fluid inlet (22a) is provided at the end, and the liquid flow section (22a) is provided at the end.
A heating part (31) for vaporizing liquid fluid is disposed within the liquid flow part (37), and below the liquid flow part (37), the liquid flow part (
37) A liquid outlet (24a) for discharging the liquid flowing out from the
) A gas-liquid separator. 6. The casing (21) is formed vertically, and inside the casing (21), the casing (21)
A cylindrical liquid flow section (37) whose base end is fixed to the bottom wall (21c) and whose tip is open is provided upright, and the liquid flow section (37)
A fluid inlet (22a) is opened at the base end of the
A heating part (31) for vaporizing the liquid fluid is disposed inside the liquid circulation part (37), and the liquid flowing out from the liquid circulation part (37) is disposed outside the liquid circulation part (37). A gas-liquid separator characterized by being provided with a liquid outlet (24a) for discharging liquid. 7. A fluid inlet (22a) and a gas outlet (23a) are disposed in the upper part of the casing (21),
A rod-shaped heating part (31) for vaporizing liquid fluid is installed upright from the lower inner surface of the casing (21), and a spiral liquid flow is provided between the casing (21) and the heating part (31). A body (38) is interposed, and the downstream surface (39) of the liquid downstream body (38) is inclined downward from the center, while the inner peripheral edge of the liquid downstream body (38) is aligned with the heating part (31). The outer periphery of the casing (21) is in close contact with the inner surface of the casing (21), and inside the casing (21) outside the lower part of the liquid flow body (38), the liquid that has flowed down the flow surface (39) is formed. A gas-liquid separator characterized by being provided with a liquid outlet (24a) for discharging fluid. 8. A fluid inlet (22a) and a gas outlet (23a) are disposed in the upper part of the casing (21),
A rod-shaped heating part (31) for vaporizing liquid fluid is erected from the lower part of the casing (21), and
A spiral liquid flow body (
38) is interposed, and the flow surface (39) of the liquid flow body (38) is interposed.
) is tilted downward from the center, while the liquid flow body (
38) has a predetermined distance from the outer periphery of the heating part (31), and the outer periphery is in close contact with the inner surface of the casing (21), and the outer periphery of the lower part of the liquid flow body (38) A gas-liquid separator characterized in that a liquid outlet (24a) is disposed in the casing (21) for discharging the liquid fluid that has flowed down the downstream surface (39). 9. A fluid inlet (22a) and a gas outlet (23a) are provided in the upper part of the casing (21), while a fluid inlet (22a) and a gas outlet (23a) are provided in the upper part of the casing (21). A rod-shaped heating part (31) is installed upright, and a spiral liquid flow body (38) into which fluid is poured is joined to the outer periphery of the heating part (31). Bottom surface (
39) is inclined downward from the center, while a liquid outlet (39) is provided in the lower outer casing (21) of the liquid flow body (38) for discharging the liquid fluid that has flowed down the flow surface (39). A gas-liquid separator characterized in that 24a) is provided.