JPH02418Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a white smoke generation device used for stage performances, etc. The present invention relates to a white smoke generating device that can be easily operated continuously and can generate thick white smoke.

[Prior Art] Conventionally, white smoke from dry ice generated by forcibly bringing solid dry ice into contact with hot water has been used to enhance the performance effects of a stage performance, etc., and various devices for this purpose have been proposed. However, although these white smoke generators have the advantage of producing thick white smoke with a simple mechanism, they are difficult to use when producing a production that requires a large amount of white smoke or when continuous white smoke is required. There is a limit to the amount and duration of white smoke produced by one device, and there is a drawback that multiple devices must be used. In other words, since dry ice, which has an extremely large amount of cold energy per unit mass, is brought into contact with hot water in the form of chunks, it is difficult to supply heat commensurate with the amount of cold heat transmitted through the entire solid dry ice, and the water temperature quickly drops, causing white smoke. Furthermore, even if a sufficient heat source was used, the supply of solid dry ice lacked continuity, and it was difficult to control the amount of smoke generated.

[Problems to be solved] In view of the above-mentioned circumstances, the inventors of the present invention have developed an easy-to-handle white smoke generator that can be operated continuously and can generate thick white smoke in the required amount at the required time. The aim is to provide equipment.

[Means for solving the problem] The white smoke generating device of the present invention continuously generates thick white smoke by generating powdered dry ice (hereinafter referred to as snow) from liquefied carbon dioxide using a horn. A hot water tank equipped with a water temperature adjustment mechanism has a white smoke outlet, a water supply pipe to the hot water tank, a water level gauge, and a nozzle with a valve at the tip, and the tip of the nozzle. A liquefied carbon dioxide gas introduction pipe with a horn attached thereto is provided, and the open end of the horn is a white smoke generating device that is provided so as to be able to come into contact with or be immersed in the hot water in the tank.

The apparatus of the present invention and its operating method will be explained below with reference to the attached FIG. 1.

FIG. 1 is a sectional view showing essential parts of an example of the device of the present invention. In the figure, 1 represents a hot water tank, and 2 represents a white smoke outlet. The water temperature adjustment mechanism 5 is for maintaining the water stored in the hot water tank at a predetermined temperature.
It is located at the bottom of the inside. Steam, thermal power, etc. can be used as the heat source for the heating element, but
An electric heater is conveniently used.

The hot water tank 1 is provided with a water supply pipe 6 and a discharge pipe 8, and water is supplied from the water supply pipe 6 and stored so that a detector indicated by a water level gauge 7 indicates a predetermined water level.

In addition, in order to maintain a predetermined water level, the water level can be automatically controlled using a constant water valve or the like.

The liquefied carbon dioxide gas introduction pipe 9 has a nozzle 12 attached to its tip for flushing the liquefied carbon dioxide gas via a regulating valve 11 such as a solenoid valve for introducing or blocking liquefied carbon dioxide gas into the device. . And, at the tip of the nozzle, there is a horn 1 in the shape of a bumper to more effectively generate snow.
3 is fitted, and the horn 13 is installed in the hot water tank 1 at the top of the hot water tank with its opening facing downward.

The nozzle 12 has an orifice diameter of 0.8 to 5.0 mm in consideration of the effect of adiabatic expansion and blockage due to snow.
Horn 1 is easy to use, and horn 1
3 varies depending on the size of the hot water tank, but is usually made of aluminum, stainless steel, resin, etc. and has a total length of 300 to 700 mm.
mm, with an opening of about 50 to 100 mmφ.

As the valve 11, a manual valve such as a ball valve may be used instead of the solenoid valve, and if necessary, a flow rate regulating valve such as a needle valve may be installed in the middle of the liquefied carbon dioxide gas introduction pipe 9. It is also possible to adjust the flow rate by providing a flow rate.

In the device of the present invention, it is necessary that the lower end of the opening of the horn 13 is at least in contact with or immersed in the hot water stored in the hot water tank, and the water supply pipe 6 is , the water level is adjusted by the discharge pipe 8 and the water level gauge 7. When the opening end of the horn 13 is located in a space above the hot water surface, the generated snow and gas (carbon dioxide) are sprayed onto the water surface, and only the snow is gradually deposited on the water surface and gradually spread to the surroundings. The water freezes into lumps of dry ice, making contact with hot water worse and reducing the amount of white smoke produced. On the other hand, if the opening end of the horn 13 is immersed too deeply in hot water, the white smoke will tend to disappear by the time the generated white smoke-containing bubbles reach the water surface, reducing the amount of white smoke generated. In addition to inviting,
This unnecessarily stirs the entire hot water, making it more likely that water droplets will form. Therefore, the opening end of the horn 13 is usually in contact with the water surface or immersed to a depth of about 50 mm below the water surface, preferably about 20 mm below the water surface.

Liquefied carbon dioxide gas is introduced into the hot water tank through the liquefied carbon dioxide gas introduction pipe 9, but usually about 18~
20kgf/cm ² G, supplied from an insulated container (not shown) maintained at around -20℃, and the water temperature in the tank is usually 60 to 80℃ in order to efficiently and continuously generate a constant amount of white smoke. The temperature is preferably maintained at about 70°C.

The white smoke generating device of the present invention includes one series of liquefied carbon dioxide gas introduction pipe having a combination of a solenoid valve 11, a nozzle 12, and a horn 13 (hereinafter referred to as a snow generating section) as shown in FIG. If it is necessary to control the amount of white smoke generated on a larger scale or more precisely over a wide range, two or more lines of these snow generating units can be provided. In this case, the operating circuit of the solenoid valve 11 is set so that each snow generating section can be operated independently or simultaneously, and the nozzle 12 has an orifice diameter of
It is convenient to set the flow rate to a relatively small flow rate of 0.8 to 2.0 mmφ.

In this way, by providing multiple snow generating units in one device, the amount of white smoke generated can be adjusted over a wider range, making it possible to adjust to changes in the size of the space that requires white smoke and the scale of the performance. It is possible to deal with this situation sufficiently.

[Effects of the invention] As described above, in the device of the present invention, by using the horn and generating snow inside the horn, the ejection pressure of liquefied carbon dioxide at the nozzle outlet is relaxed, and the horn opening As a result of the end touching or being immersed in the water surface, combined with the stirring effect of carbon dioxide gas generated near the water surface at the same time as snow,
Contact between snow and water vapor is promoted, and the cold heat of snow can be used to generate white smoke.
This allows a sufficient amount of continuous white smoke to be ensured without snow remaining in clumps. Moreover,
The device of the present invention has a simple structure and can continuously generate thick white smoke for a long period of time, so its range of applications is extremely wide.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing essential parts of an example of the device of the present invention. Explanation of symbols in the figure: 1... Hot water tank, 2... White smoke outlet, 3... Heater, 5... Water temperature adjustment mechanism,
6... Water supply pipe, 7... Water level gauge, 9... Liquefied carbon dioxide gas introduction pipe, 11... Solenoid valve, 12... Nozzle,
13...Horn.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A hot water tank equipped with a water temperature adjustment mechanism, which has a self-smoke outlet, a water supply pipe to the hot water tank, a water level gauge, and a nozzle with a valve at the tip; A white smoke generating device comprising liquefied carbon dioxide gas introduction pipes each having a horn attached to the tip thereof, and the open ends of the horns being provided so as to be able to come into contact with or be immersed in the hot water in the tank. (2) Utility model registration claim (1) consisting of two or more liquefied carbon dioxide gas introduction pipes each having a nozzle at the tip via a valve and a horn attached to the tip of the nozzle. The white smoke generating device described in .