JPH02173693A - Display device - Google Patents

Abstract

PURPOSE:To obtain the device which makes a more attractive display by changing the configuration of an air bubble group complicatedly by providing an internal cylinder in a cylindrical water tank, jetting air from the lower end between the internal and external cylinders, and generating a downward flow between the external and internal cylinders. CONSTITUTION:An air nozzle 41 is provided between the internal cylinder 23 and external cylinder 22 of a bottom plate 21 and connected to an air supply pipe 43 through an flow rate control valve 45. A water outlet 51 is provided at the center part of the bottom plate 21 a water intake 52 is provided between the nozzles 41. Water W is poured in the water tank 11 to above the upper end of the internal cylinder 23, an air pump 42 is operated with the valve 45 open, and a liquid pump 55 is put in operation. Consequently, the air group changes complicatedly according to the downward flow between the external and internal cylinders and the device which makes a more attractive display is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a display device installed in a corner of a coffee shop, a hotel lobby, a waiting room, etc., as an alternative to, for example, plants.

Prior Art This type of device is known, for example, from Japanese Patent Application Laid-open No. 6T-29E38.
As disclosed in Publication No. 1, a transparent tank into which a liquid is placed, a supply pipe for feeding gas into the liquid in the transparent tank from a gas supply source outside the transparent tank, and a flow rate provided in the supply pipe. There are known devices that include a control valve and a valve control device that controls the opening degree of the flow rate control valve.

In the above device, when the flow rate control valve is opened, gas is sent from the gas supply source through the supply pipe into the liquid in the transparent tank, and the fed gas becomes bubbles and rises in the liquid. However, when the opening degree of the flow rate control valve is changed, the shape of the bubble group, such as the size and number of bubbles, changes, thereby arousing the viewer's excitement.

Problems to be Solved by the Invention The above device attempts to change the shape of the bubble group only by controlling the opening degree of the flow control valve, so the change tends to be somewhat monotonous. .

An object of the present invention is to provide a display device that solves the above problems.

Means for Solving the Problems In a display device according to the present invention, a tank containing a liquid is composed of a bottom plate, and an outer cylinder and an inner cylinder respectively provided upright on the bottom plate, and of the outer cylinder and the inner cylinder, At least the outer cylinder is formed to be transparent, the height of the inner cylinder is lower than the height of the outer cylinder, and the gas jet nozzle is disposed so that it can jet gas between the lower ends of the outer cylinder and the inner cylinder, and the gas jet nozzle is , one end is connected to a gas pump, the other end is connected,
A flow rate control valve is provided in the gas supply pipe, a liquid discharge port is provided inside the inner cylinder of the bottom plate, and a liquid suction port is provided outside the inner cylinder, and liquid is circulated between the liquid discharge port and the liquid suction port. A pipe is installed, a liquid pump is provided in the liquid circulation pipe, and a control device is provided to control the opening degree of the flow rate control valve.

In the functional display device, the tank containing the liquid is composed of a bottom plate and an outer cylinder and an inner cylinder that are respectively provided upright on the bottom plate, and of the outer cylinder and the inner cylinder, at least the outer cylinder is formed transparent. , the height of the inner cylinder is made lower than the height of the outer cylinder,
A gas jet nozzle is arranged so as to jet gas between the lower ends of the outer cylinder and the inner cylinder, and one end of the gas supply pipe is connected to the gas pump, and the other end of the gas supply pipe is connected to the gas jet nozzle. Since a control valve is provided, when the liquid is filled in the tank to a level exceeding the top of the inner cylinder, and the flow control valve is opened and the gas pump is activated, gas will be ejected from the nozzle through the supply pipe. The ejected gas becomes bubbles and rises between the outer cylinder and the inner cylinder.

Since the display device is equipped with a control device that controls the opening degree of the flow control valve, changing the opening degree of the flow control valve changes the shape of the bubble group rising between the outer cylinder and the inner cylinder. Change.

A liquid discharge port is provided inside the inner cylinder of the bottom plate, a liquid suction port is provided outside the inner cylinder, a liquid circulation pipe is installed across the liquid discharge port and the liquid suction port, and a liquid pump is installed in the liquid circulation pipe. Therefore, when the liquid pump is operated, liquid is discharged from the liquid discharge port and sucked into the liquid suction port, which causes an upward flow of liquid within the inner cylinder, causing a flow between the outer cylinder and the inner cylinder. A downward flow of liquid occurs.

Due to this downward flow, the shape of the bubble group changes more complicatedly.

Example Embodiments of the invention will now be described with reference to the drawings.

The display device includes a water tank 11.

The water tank 11 is composed of a circular bottom plate 21, and an outer cylinder 22 and an inner cylinder 23, which are respectively provided upright in the center of the bottom plate 21. The inner side of the inner cylinder 23 is an inner passage 11A, and the outer cylinder 22
The space between the inner cylinder 23 and the inner cylinder 23 is an outer passage 11B. Bottom plate 21
is supported by a plurality of supports 25 erected on a slightly larger circular horizontal board 24. A lower cover 26 covers the space between the bottom plate 21 and the substrate 24 and the lower end of the outer tube 22 . The outer tube 22 and the inner tube 23 are both formed of transparent plastic into a cylindrical shape and are concentric with each other, but the height of the inner tube 23 is lower than the height of the outer tube 22. A top plate 27 made of transparent plastic is placed on the upper end of the outer cylinder 22 so as to cover the opening. Outer cylinder 2
2 and the top plate 27 are covered with an upper cover 28. A lighting fixture 31 is suspended from the top wall of the upper cover 28, and a color changing device 32 is installed on the top plate 27 to change the light beam of the lighting fixture 31 to the top wall.

Water W is filled in the water tank 11 to a level exceeding the upper end of the inner cylinder 23, and %S is filled.

Air nozzles 4I are attached to six locations that equally divide the annular portion of the bottom plate 21 outside the inner cylinder 23 in the circumferential direction so that the air nozzles 4I extend through these locations and direct their respective jet ports 41a upward. The supply port 41b of each air nozzle 41 is connected to the other end of an air supply pipe 43 whose one end is connected to an air pump 42 via a branch pipe 44 which is not shown in detail. The air supply pipe 43 is provided with a flow rate control valve 45 . The flow rate control valve 45 is an electro-pneumatic proportional valve whose opening degree is controlled by I11 by a current supplied to a solenoid.

A water outlet 51 is provided in the center of the bottom plate 21.
Six water suction ports 52 are provided in the annular portion outside the inner cylinder 23 of No. 1 so as to be located one each between exactly adjacent air nozzles 41.

One end of a circulation pipe 53 is connected to the water outlet 51, and the other end of the circulation pipe 53 is connected to the six water suction ports 52 via a branch pipe 54, which is not shown in detail. A water pump 55 is provided in the circulation pipe 53.

Air pump 42, flow control valve 45 and water pump 55 are controlled by one controller 81.

The control device C1 is equipped with a storage device that stores a predetermined program, etc., and the valve opening degree of the flow rate control valve 45, starting/stopping of both pumps 42 and 55, suction/discharge amount, etc. are controlled by the program etc. controlled.

An annular protrusion 71 is formed at the upper end of the outer surface of the inner cylinder 23, and an annular groove 72 is formed at the lower end of the outer surface of the inner cylinder 23, so that the gap in the inner and outer directions of the outer passage 11B is gradually reduced from the top to the small gap. 3 of part C1, intermediate gap part C2 and large gap part C3
It is changing in stages.

When the flow rate control valve 45 is opened and the air pump 42 is activated, air is ejected all at once from the six air nozzles 41 through the supply pipe 43, and the ejected air becomes bubbles and rises inside the outer passage 11B. . - On the other hand, when the water pump 55 is operated, water is discharged from the water outlet 51 toward the inner passage +1A, and water is sucked into the water suction opening 52 from the outer passage 11B, thereby causing the water to flow into the inner passage 11A. An upward flow of water occurs in the outer passage JIB, and a downward flow of water occurs in the outer passage JIB. The flow velocity of this downward flow is fastest in the small gap C1, slowest in the large gap C3, and intermediate in the middle gap C2.

The downward flow of water generated in the outer passage 11B acts to suppress the rise of bubbles, and the faster the flow rate, the greater the effect. Therefore, under a certain flow rate of water,
The bubbles rise rapidly in the large gap C3, and the rate of rise gradually becomes slower from the intermediate gap C2 to the small gap CI.

When the flow rate is gradually increased, the bubbles are removed from the large gap C.
3 to the intermediate gap C2, but cannot pass through the small gap C1 and is stored in the intermediate gap C2 below, and when the flow rate is further increased,
The bubbles will also descend. As described above, by controlling the valve opening degree of the flow rate control valve 45, starting/stopping of both pumps 42.55, suction/discharge amount, etc. with the control device 6I, the rising speed or descending speed of the bubbles can be changed. The location where air bubbles are collected can be changed.

Effects of the Invention According to this invention, when the liquid is filled in the tank to a level exceeding the upper end of the inner cylinder, the flow control valve is opened, and the gas pump is operated, gas is ejected from the nozzle through the supply pipe. The ejected gas becomes bubbles and rises between the outer cylinder and the inner cylinder, but when the opening degree of the flow control valve is changed, a group of bubbles rises between the outer cylinder and the inner cylinder. When the shape of the liquid changes and the liquid pump is further operated, liquid is discharged from the liquid discharge port and liquid is sucked into the liquid suction port, which causes an upward flow of liquid inside the inner cylinder and causes the liquid to flow into the outer cylinder. A downward flow of liquid is generated between the inner cylinders, and this downward flow causes the bubble group to change in a more complicated manner, thereby providing a display device that is more exciting to the viewer.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a vertical longitudinal sectional view, and FIG. 2 is a sectional view taken along the line ■--■ in FIG. 11... Tank, 21... Bottom plate, 22... Inner cylinder, 23
... Outer cylinder, 41 ... Gas nozzle, 42 ... Gas pump, 43 ... Gas supply pipe, 45 ... Flow rate control valve,
51...Liquid discharge port, 52...Liquid suction port, 53.
...Circulation pipe, 55...Liquid pump, 61...Control device. Above is Figure 1, 2nd page.

Claims (1)

[Claims] The tank 11 containing the liquid W is composed of a bottom plate 21 and an outer cylinder 22 and an inner cylinder 23 that are respectively provided in an upright manner.
2 is formed transparent, the height of the inner cylinder 23 is made lower than the height of the outer cylinder 22, and the gas jet nozzle 41 blows the gas into the outer cylinder 22.
and the lower end of the inner cylinder 23, one end of which is connected to a gas pump 42, and the other end of a gas supply pipe 43 is connected to the gas jet nozzle 41, and a flow rate control valve 45 is connected to the gas supply pipe 43. A liquid discharge port 51 is provided inside the inner cylinder 23 of the bottom plate 21, and a liquid suction port 52 is provided outside the inner cylinder 23, and liquid circulation is provided between the liquid discharge port 51 and the liquid suction port 52. A pipe 53 is installed, a liquid pump 55 is provided in the liquid circulation pipe 53, and a flow rate control valve 45 is provided.
A display device equipped with a control device 61 that controls the opening degree of the display device.