JPH0612804Y2 - Gas-liquid separation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a gas-liquid separator suitable for use as a cooling device for a transmissive liquid crystal display device.

[Conventional technology and its problems]

Generally, in a transmissive liquid crystal device, cooling water is circulated by a cooling device in order to prevent the liquid crystal, the polarizing plate and the like from being heated by a backlight and shortening the life thereof. In this case, if air bubbles are mixed in the cooling water, the image quality of the liquid crystal display device deteriorates. In order to prevent the deterioration of image quality due to such bubbles, in a liquid crystal display cooling device, a gas-liquid separator is installed in front of the liquid crystal display device to separate the bubbles from the cooling water flowing into the liquid crystal display device. I am trying.

However, the conventional gas-liquid separation device has a problem that the structure is complicated and expensive. Further, there is a problem that an extra space is required for the gas-liquid separation device, and the entire cooling device including the gas-liquid separation device becomes large.

The present invention has been made to solve the above problems, and provides a gas-liquid separation device that has a simple structure, can be manufactured at low cost, and can minimize the installation space required. With the goal.

[Means for achieving the purpose]

In order to achieve the above object, the gas-liquid separation device of the present invention is provided with a pair of upper and lower passages, one end of which is located above the inside of the lower passage. It is characterized in that a communication passage is formed which is open to the wall surface and the other end is opened to the lower wall surface inside the upper passage to connect the pair of upper and lower passages.

[Action]

The gas-liquid separation device according to the present invention is used, for example, as follows. That is, one end of the lower passage is connected to the cooling water discharge side of the cooling water supply source, and the other end is connected to the cooling water inlet of the liquid crystal display device. On the other hand, one end of the upper passage is connected to the cooling water outlet of the liquid crystal display device, and the other end is connected to the inflow side of the cooling water supply source.

In the cooling device having such a configuration, when bubbles are mixed in the cooling water discharged from the cooling water supply source, the bubbles float up while the liquid is flowing in the lower passage, and It moves with the liquid along the upper wall surface inside the passage. When the gas reaches the communication passage during the movement, the gas passes through the communication passage and enters the upper passage. Thereby, the air bubbles mixed in the cooling water are separated.

The cooling water from which the air bubbles are separated cools the liquid crystal display device and flows into the upper passage. Then, it goes to the cooling water supply source side.

Of course, the gas-liquid separation device of the present invention may be used in other ways than the above.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIG. 1, this gas-liquid separation device 1 comprises a device body 11 with its hoop oriented horizontally. The device main body 11 has a cylindrical shape, and inside the device main body 11, two passages 1 extending parallel to the lane lines of the device main body 1 are provided.
2 and 13 are formed separately in the vertical direction. An inflow port 12a into which a liquid, for example, cooling water flows is formed at one end of the lower passage 12, and an outflow port 12b from which the liquid flows out is formed at the other end. On the other hand, an inlet 13a is formed at the end of the passage 13 located on the outlet 12b side, and an outlet 13b is formed at the opposite end.

A communication passage 14 extending in the vertical direction is formed at the end of the apparatus body 11 on the outlet 12b side.

The communication passage 14 is for causing bubbles separated from the liquid flowing in the lower passage 12 to float up to the upper passage 13, the lower end of which opens to the upper wall surface of the lower passage 12 and the upper end thereof. The lower wall surface of the upper passage 13 is opened. In this case, if the liquid flows from the upper passage 13 to the lower passage 12, the inflow of the liquid prevents bubbles from floating from the lower passage 12 to the upper passage 13. Therefore, in the gas-liquid separator 1, the pressure inside the lower passage 12 is increased by making the cross-sectional area of the lower passage 12 larger than that of the upper passage 13. It is set higher than the above, so that part of the liquid flowing in the lower passage 12 flows into the upper passage 13.

Next, a cooling device for a liquid crystal display device using the gas-liquid separation device 1 having the above-described configuration will be described.
Is a pump serving as a supply source of the cooling water, and its discharge port 2a
Is connected to the inflow port 12a of the lower passage 12 of the gas-liquid separator 1. The outlet 12b of the passage 12 is connected to the cooling water inlet 3a of the liquid crystal display device 3. The cooling water outlet 3b of the liquid crystal display device 3 is connected to the upper passage 1 of the gas-liquid separation device 1.
3 and the outlet 13a of the passage 13 above the passage 13 is connected to the tank-type gas-liquid separator 4.

This tank type gas-liquid separation device 4 is, as shown in FIG.
It is provided with a container-shaped main body 41 and a relief valve 42 provided on an upper portion of the main body 41. The main body 41 is provided with an inflow port 41a and an outflow port 41b.
The liquid that has flowed into the main body 41 from 1a has its bubbles separated and flows out from the outlet 41b. Further, the air bubbles separated from the liquid accumulate in the upper space of the main body 41, and when a predetermined pressure is reached, the ball valve 4 of the relief valve 42.
2a is pushed up from the valve seat 42c against the spring 42b.
As a result, the gas flows out from the valve hole 42b to the outside.

The inlet 41a of the tank-type gas-liquid separator 4 is connected to the outlet 13b of the upper passage 13 of the gas-liquid separator 1,
The outlet 41b is connected to the inlet 2b of the pump 2.

In the above cooling device, when air bubbles are mixed in the cooling water discharged from the pump 2, the air bubbles float from the cooling water while the cooling water passes through the passage 12 and the passage 12
To the upper wall surface of the inside, and moves toward the outlet 12b side together with the cooling water.

When reaching the communication passage 14, the passage 13 is passed therethrough.
To Thereby, the cooling water and the bubbles are separated.
Therefore, the liquid crystal display device 3 is cooled by the cooling water in which bubbles are not mixed, and it is possible to prevent deterioration of the image due to bubbles.

The cooling water that has cooled the liquid crystal display device 3 flows into the passage 13 of the liquid crystal separation device 1 and reaches the tank-type gas-liquid separation device 4 containing air bubbles. In the tank type gas-liquid separator 4, air bubbles are separated from the cooling water. The separated bubbles collect in the upper space of the main body 41.

When the pressure of the accumulated gas reaches a predetermined pressure, the ball valve 42a is pushed up against the biasing force of the spring 42b, and flows out through the valve hole 42d. The cooling water from which the air bubbles are separated goes to the pump 2 and circulates again as cooling water.

As described above, in the gas-liquid separation device of this invention, 2
One passage 12, 13 and a communication passage 14 for connecting them
, And the structure is simple and can be manufactured at low cost.

Further, the passages 12 and 13 can be used as a part of piping. Therefore, no special installation location for disposing the gas-liquid separation device 1 is required.

Therefore, when used in a cooling device or the like, the size of the entire device can be reduced, and the degree of freedom in layout can be increased. In particular, it is possible to use a part of the pipes as the passages 12 and 13, and in such a case, the installation space as the gas-liquid separation device becomes almost unnecessary.

Although the passages 12 and 13 are extended straight in the above embodiment, they may be curved in an arc shape or formed in a spiral shape. Further, the passage 12 is inclined so that the outlet 12b side of the passage 12 is slightly higher than the inlet 12a side without extending in the horizontal direction.
The passage 13 may also be inclined so that its outlet 13b side is slightly higher than its inlet 13a side.

Further, although the cross-sectional area of the passage 12 is larger than the cross-sectional area of the passage 13, they may be the same.

[Effect of device]

As described above, according to the gas-liquid separation device of the present invention, the pair of upper and lower passages is provided, and one end is opened between the pair of passages on the upper wall surface inside the lower passage. Since the other end is formed with the communication passage opening to the lower wall surface inside the upper passage, the structure is simple and the manufacturing cost is low, and the required installation space can be minimized. The effect that it can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a view showing a schematic configuration of a cooling device using the gas-liquid separation device shown in FIG. 1, and FIG. 3 is shown in FIG. It is a longitudinal cross-sectional view showing a tank type gas-liquid separator used. 12 ... Lower passage, 13 ... Upper passage, 14 ... Communication passage.

Claims (1)

[Scope of utility model registration request] 1. A pair of upper and lower passages are provided, one end of which is opened to an upper wall surface inside the lower passage and the other end is inside the upper passage between the pair of passages. A gas-liquid separation device, characterized in that a communication passage is formed which opens in the lower wall surface to connect the pair of upper and lower passages.