JP2586083Y2 - Gas-liquid separator - Google Patents

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 used in a refrigeration circuit of a heat pump type air conditioner.

[0002]

2. Description of the Related Art Generally, in a refrigeration circuit of a heat pump type air conditioner employing a capacity control system or a multi-operation control system, liquid refrigerant that has not been completely evaporated by an evaporator directly enters a compressor to perform liquid compression. A gas-liquid separator (liquid reservoir: accumulator) for separating a liquid refrigerant and a gas refrigerant is used in order to adjust the amount of the refrigerant in the system properly.

[0003] The gas-liquid separator is provided, for example, between the outlet of the evaporator and the suction port of the compressor.
As shown in FIG. 8, a gas refrigerant outlet (compressor suction port) 2 is provided at the top of a housing 1 having a gas-liquid separation chamber 1a having a size corresponding to the capacity and charge amount of the compressor. And a two-phase refrigerant inlet 4 from the evaporator.
As shown in FIG. 5 and FIG. 7, the gas refrigerant and the liquid refrigerant are vertically separated from each other by the difference in weight between the gas refrigerant and the liquid refrigerant.

However, the refrigerant in the gas-liquid two-phase state introduced into the gas-liquid separation chamber 1a from the outlet of the evaporator has a considerable ejection speed.

Therefore, for example, when a two-phase refrigerant is ejected in a swirling manner from the side as shown in the figure, an air column is formed in the liquid refrigerant due to the swirling force due to the swirling force, and the gas flows to the outlet of the liquid refrigerant. There is a problem that the refrigerant is sucked.

As described above, in the structure of the conventional gas-liquid separator,
Opposite ones were mixed in the outlets of the gas refrigerant and the liquid refrigerant, and good gas-liquid separation could not be performed.

In order to prevent the generation of air columns due to the eddy current, recently, for example, as shown in FIG. 6, near the bottom of the gas-liquid separation chamber 1a, a plurality of liquid refrigerants as shown in FIG. A vortex extinguishing plate 10 formed with through holes 10a, 10a,... Has been proposed to prevent the generation of eddy current (for example, Proceedings of the Refrigeration Association of Japan, 1986, pp. 21-24). 6. Research on high-performance gas-liquid separators "
2nd report).

[0008]

However, in the case of the above structure, the height of the gas-liquid interface is higher than that of the vortex plate 10 because the vortex plate 10 is fixed near the bottom of the gas-liquid separation chamber 1a. When it is located above, the gas-liquid separation can be performed appropriately, but when it is located at other interface positions, there is a problem that good gas-liquid separation cannot be performed.

[0009]

Means for Solving the Problems The invention described in each of claims 1 to 3 of the present application has been made for the purpose of solving the above-mentioned conventional problems, and is constituted as follows. .

(1) Configuration of the invention according to claim 1 The gas-liquid separator according to the invention according to claim 1 comprises a gas-liquid separation chamber 1a into which a gas-liquid two-phase refrigerant is introduced in a swirling direction, and the gas-liquid separation. Room 1a
A gas refrigerant outlet 2 provided at the upper part of the gas refrigerant, a liquid refrigerant outlet 3 provided at the bottom of the gas-liquid separation chamber 1a, and a gas refrigerant outlet 3 provided between the gas refrigerant outlet 2 and the liquid refrigerant outlet 3. A vortex elimination plate 10 for suppressing eddy currents of the gas-liquid two-phase refrigerant introduced in the swirling direction, wherein the vortex elimination plate 10 moves up and down in accordance with a change in liquid level. It is characterized by having a structure.

(2) Structure of the invention according to claim 2 The gas-liquid separator according to the invention according to claim 2 comprises a gas-liquid separation chamber 1a in which a gas-liquid two-phase refrigerant is introduced in a swirling direction, and the gas-liquid separation. Room 1a
A gas refrigerant outlet 2 provided at the upper part of the gas refrigerant, a liquid refrigerant outlet 3 provided at the bottom of the gas-liquid separation chamber 1a, and a gas refrigerant outlet 3 provided between the gas refrigerant outlet 2 and the liquid refrigerant outlet 3. And a vortex baffle 10 for suppressing the vortex of the gas-liquid two-phase refrigerant introduced in the swirling direction, wherein the vortex baffle 10 is adapted to change the liquid level of the liquid refrigerant. The gas refrigerant outlet 2 is closed when the liquid level rises above a predetermined level, and the liquid refrigerant is closed when the liquid level falls below a predetermined level. The outlet 3 is closed.

(3) The structure of the invention according to claim 3 The gas-liquid separator of the invention according to claim 3 is the structure of the invention according to claim 2, wherein the vortex elimination plate 10 has a gas refrigerant on the upper surface side. The valve body surface 10c corresponding to the outlet 2 is formed, while the valve body surface 10b corresponding to the liquid refrigerant outlet 3 is formed on the lower surface side.
Is formed.

[0013]

The gas-liquid separator of the present invention according to the first to third aspects of the present invention is configured as described above. As a result, the following functions are achieved based on the respective configurations.

(1) Operation of the invention according to claim 1 First, in the gas-liquid separator according to the invention according to claim 1, as described above, first, the gas-liquid separation chamber into which the gas-liquid two-phase refrigerant is introduced in the swirling direction. 1a, a gas refrigerant outlet 2 provided at the top of the gas-liquid separation chamber 1a, a liquid refrigerant outlet 3 provided at the bottom of the gas-liquid separation chamber 1a, the gas refrigerant outlet 2, and the liquid refrigerant. A vortex elimination plate 10 provided between the outlet 3 and the vortex of the gas-liquid two-phase refrigerant introduced in the swirling direction to form a gas-liquid separator. The gas-liquid two-phase refrigerant introduced in the swirling direction at the speed is the gas-liquid separation chamber 1a.
The gas refrigerant 7 is appropriately separated into two layers, upper and lower, according to its weight.
Are taken out from the bottom side liquid refrigerant outlet 3 respectively.

Further, in this case, the vortex generated by the gas-liquid two-phase refrigerant introduced in the swirling direction as described above is suppressed by the vortex-extinguishing plate 10, thereby preventing the generation of a gas column which hinders the gas-liquid separation performance. . In particular, in the configuration of the present invention, the vortex extinguishing plate 10 is formed in a float structure that moves up and down according to a change in the liquid level, and is always located at the gas-liquid interface.

Therefore, irrespective of the fluctuation of the liquid level of the liquid refrigerant, the generation of the vortex can be effectively prevented at an appropriate position at all times. The liquid separating function can be realized.

(2) Operation of the invention according to claim 2 Next, in the gas-liquid separator according to the invention according to claim 2, first, the gas-liquid two-phase refrigerant is swirled in the swirling direction, as in the above-described claim 1. A gas-liquid separation chamber 1a introduced into the gas-liquid separation chamber 1a, a gas refrigerant outlet 2 provided at an upper portion of the gas-liquid separation chamber 1a,
And a vortex eliminator provided between the gas refrigerant outlet 2 and the liquid refrigerant outlet 3 for suppressing the vortex flow of the gas-liquid two-phase refrigerant introduced in the swirling direction. A gas-liquid separator is configured to include a plate 10 and a refrigerant in a gas-liquid two-phase state introduced in a swirling direction at a considerable ejection speed during a steady operation in the gas-liquid separation chamber 1a according to its weight. The gas refrigerant 7 is taken out from the upper gas refrigerant outlet 2 and the liquid refrigerant 5 is taken out from the bottom liquid refrigerant outlet 3.

The gas-liquid 2 introduced in the swirling direction
The vortex generated by the phase refrigerant is suppressed by the vortex extinguishing plate 10, and the generation of an air column that hinders the gas-liquid separation performance is prevented. In particular, in the configuration of the present invention, the vortex extinguishing plate 10 is formed in a float structure that moves up and down according to a change in the liquid level.
It is always located at the gas-liquid interface.

Therefore, irrespective of the fluctuation of the liquid level of the liquid refrigerant, the generation of the vortex can always be effectively prevented at an appropriate position. The liquid separating function can be realized.

Further, in the case of the present invention, the vortex elimination plate 10 which performs the eddy current suppressing action as described above is formed in a float structure which moves up and down according to the change in the liquid level of the liquid refrigerant as described above. In addition, when the changing liquid level rises above a predetermined level, the gas refrigerant outlet 2 is closed, and when the liquid level falls below a predetermined level, the liquid refrigerant outlet 3 is closed. It is configured to be closed. Therefore, when the liquid level of the liquid refrigerant rises to the uppermost position of the gas-liquid separation chamber 1a or conversely lowers to the lowermost position, such as when starting or stopping other than during the above-described steady operation, By closing the gas refrigerant outlet 2 and the liquid refrigerant outlet 3, it is possible to reliably prevent the liquid refrigerant from entering the gas refrigerant outlet 2 and the gas refrigerant from entering the liquid refrigerant outlet 3. .

(3) Operation of the invention according to claim 3 Further, in the gas-liquid separator according to the invention according to claim 3, when the configuration according to the invention according to claim 2 is adopted, the vortex elimination plate 10 is On the upper surface side, a valve body surface 10c corresponding to the gas refrigerant outlet 2 is formed, while on the lower surface side, a valve body surface 10b corresponding to the liquid refrigerant outlet 3 is formed.

Therefore, the function of the invention according to claim 2 can be more appropriately realized.

[0023]

Therefore, according to the gas-liquid separator of the present invention, it is possible to minimize the intrusion of the liquid refrigerant into the gas refrigerant outlet and the gas refrigerant into the liquid refrigerant outlet. Thus, it is possible to provide a high-performance gas-liquid separator in which the gas-liquid separation performance is maximized.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) First Embodiment FIGS. 1 to 3 show cross-sectional structures corresponding to respective operation states of a gas-liquid separator according to a first embodiment of the present invention.

The gas-liquid separator (accumulator) is provided, for example, between the outlet side of the evaporator and the suction side of the compressor in the air conditioner. A gas refrigerant outlet (compressor suction port) 2 is provided at the upper part of a cylindrical housing 1 provided with a gas-liquid separation chamber 1a having a size corresponding to the charge amount, and a liquid refrigerant outlet 3 is provided at the lower part. And a gas-liquid two-phase refrigerant inlet 4 from the evaporator is inserted and connected from the side to the turning direction of the separation chamber as shown in the figure. The stream is introduced without being scattered, and the gas refrigerant 7 and the liquid refrigerant 5 are separated into two upper and lower layers as shown in FIG.

A space between the opening 2a of the gas refrigerant outlet 2 and the opening 3a of the liquid refrigerant outlet 3 in the gas-liquid separation chamber 1a is provided on the inner wall surface of the housing 1 as shown in the figure. A vortex elimination plate 10 having a float structure which can be moved up and down vertically through the vertical gas-liquid separation chambers 11, 11, which has projections provided on both sides thereof, is provided with a guide groove of a corresponding guide portion 11 of the housing 1. It is provided so as to be slidably fitted to 11a.
The vortex extinguishing plate 10 is formed with a plurality of through holes 10a, 10a,... For flowing down the liquid refrigerant near its peripheral edge, and the liquid separated through the through holes 10a, 10a,. The refrigerant 5 passes to the liquid refrigerant outlet 3 side. The vortex extinguishing plate 10 moves up and down in accordance with a change in the liquid level of the separated liquid refrigerant 5. For example, at the time of starting at a central valve body portion having no through hole, a liquid refrigerant outlet is provided as shown in FIG. 3, while the operation is stopped, the opening 3a rises as shown in FIG. 3 to close the opening 2a of the gas refrigerant outlet 2. Reference numeral 9 denotes a shielding plate provided around the opening 2a of the gas refrigerant outlet 2.

In this configuration, for example, the vortex extinguishing plate 10
As shown in FIG. 1, when a refrigerant flow in a gas-liquid two-phase state is introduced from the two-phase refrigerant introduction port 4 at a considerable jet velocity in the swirling direction, as shown in FIG. The vortex is swirled by the energy of the jet to form a vortex, which causes a problem that an air column is generated to the bottom and air bubbles enter the liquid refrigerant to some extent.

However, in this embodiment, as described above,
Since the vortex extinction plate 10 having the float structure is provided at the gas-liquid interface of the gas-liquid separation chamber 1a, the vortex itself that generates the above-mentioned air column is not generated, and the liquid level is always maintained. , So that bubbles do not enter due to the waving of the liquid surface.

Moreover, in the case of this embodiment, the vortex eradicating plate 10 is used.
The lower surface 10b and the upper surface 10c of the central portion respectively have the valve closing action when starting and stopping the opening 3a of the liquid refrigerant outlet 3 and the opening 2a of the gas refrigerant outlet 2 (the opening of the shielding plate 9). , So that the gas refrigerant enters the liquid refrigerant outlet 3 and also enters the gas refrigerant outlet 2 during extreme liquid level fluctuations at the start and stop of the operation. It is not necessary to cause the inflow of the liquid refrigerant.

(2) Second Embodiment FIG. 4 shows the structure of a gas-liquid separator according to a second embodiment of the present invention.

In this embodiment, the upper and lower surfaces 10c and 10b of the central portion of the vortex plate 10 are respectively provided with convex portions (valve portions) as shown in FIG. On the body surface) to improve the fitting state when the above-mentioned outlet is closed.

(3) Third Embodiment FIG. 5 shows the structure of a gas-liquid separator according to a third embodiment of the present invention.

In this embodiment, in particular, even when the vortex erasing plate 10 is tilted due to rising or rising of the liquid surface when the vortex erasing plate 10 is moved up and down, the vortex erasing plate 10 can be moved.
The end face of the peripheral portion is improved to have a round shape so that can move up and down smoothly. By doing so, the followability as a float is greatly improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a structure of a gas-liquid separator according to a first embodiment of the present invention in a steady operation state.

FIG. 2 is a sectional view showing a structure of the gas-liquid separator according to the first embodiment of the present invention at the time of starting operation.

FIG. 3 is a cross-sectional view showing the structure of the gas-liquid separator according to the first embodiment of the present invention when the operation is stopped.

FIG. 4 is a sectional view showing a structure of a gas-liquid separator according to a second embodiment of the present invention.

FIG. 5 is a sectional view showing a structure of a gas-liquid separator according to a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional view showing the structure of a conventional gas-liquid separator.

FIG. 7 is a plan view showing the structure of a conventional gas-liquid separator.

FIG. 8 is a plan view showing a structure of a main part of a conventional gas-liquid separator.

[Explanation of symbols]

1 is a housing, 1a is a gas-liquid separation chamber, 2 is a gas refrigerant outlet, 3
Is a liquid refrigerant outlet, 4 is a two-phase refrigerant inlet, 9 is a shielding plate, 1
Reference numeral 0 denotes a vortex plate, reference numeral 10a denotes a through hole, and reference numeral 11 denotes a gas-liquid separation chamber.

Claims (3)

(57) [Scope of request for utility model registration] A gas-liquid separation chamber (1a) into which a gas-liquid two-phase refrigerant is introduced in a swirling direction; a gas refrigerant outlet (2) provided at an upper part of the gas-liquid separation chamber (1a); A liquid refrigerant outlet (3) provided at the bottom of the gas-liquid separation chamber (1a);
(2) and provided between the liquid refrigerant outlet (3), the orbiting side
Vortex elimination plate that suppresses the vortex of gas-liquid two-phase refrigerant introduced in the opposite direction
(10) In the gas-liquid separator comprising:
(10) A gas-liquid separator characterized by having a float structure which rises and falls according to a change in liquid level. 2. A gas-liquid separation chamber (1a) into which a gas-liquid two-phase refrigerant is introduced in a swirling direction, a gas refrigerant outlet (2) provided above the gas-liquid separation chamber (1a), A liquid refrigerant outlet (3) provided at the bottom of the gas-liquid separation chamber (1a);
(2) and provided between the liquid refrigerant outlet (3), the orbiting side
Vortex elimination plate that suppresses the vortex of gas-liquid two-phase refrigerant introduced in the opposite direction
(10) In the gas-liquid separator comprising:
Occlusion (10), Rutotomoni forming shape in floating structure to move vertically in response to changes in liquid level of the liquid refrigerant, an outlet (2) collected the gas refrigerant when the liquid surface level rises above a predetermined level to one, the gas-liquid separator the liquid level is when lowered below a predetermined level, characterized in that so as to close the liquid refrigerant outlet (3). 3. A vortex extinguishing plate (10) has a gas refrigerant collecting surface on an upper surface side.
A valve body surface (10c) corresponding to the outlet (2) is formed.
On the other hand, the valve body surface corresponding to the liquid refrigerant outlet (3) on the lower surface side
3. The method according to claim 2, wherein (10b) is formed.
Gas-liquid separator.