JPS6241318Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an ammonia-steam mixed gas generator for a dry type diazo copying machine.

In order to keep the water level of the excessively supplied ammonia water at a constant level, conventional products of this type have an overflow container 16 provided outside the storage tank 1 and a communicating pipe between the two, as shown in FIG. There is one connected with 17.

However, when the ammonia water vapor mixed gas is introduced into the developing chamber 5 through the pipe 4, the gas distribution pipe (not shown) in the pipe 4 and the developing chamber 5 produces a mixture of several millimeters to several tens of millimeters of Ag. A pressure loss occurs, and the pressure of the ammonia-steam mixed gas in the storage tank 1 becomes higher than atmospheric pressure due to the influence of the pressure loss, so the liquid level of the ammonia water 2 is pushed down and the water level increases. Setting water level H from ₀
The temperature drops to _H1 , which exposes a part of the heater 3 and leaves it in an empty state, resulting in failures such as wire breakage.

This invention eliminates the drawbacks of the conventional ones and provides an ammonia-steam mixed gas generator for a dry diazo copying machine in which the pressure loss of the ammonia-steam mixed gas does not affect the level of ammonia water in the storage tank. The purpose is to

This invention will be explained with reference to embodiments shown in the drawings.

In Fig. 2, 1 is a cylindrical storage tank, for example, which is used to store ammonia water 2, and 3 is a small amount (for example, several Spiral sheath heaters are arranged at intervals (on the order of millimeters); 4 is a pipe connected to the upper end of the storage tank 1 to guide the ammonia water vapor mixed gas from the storage tank 1 to the developing chamber 5; 6 is a pipe arranged in the center of the storage tank 1; It is a thin tube for overflow whose upper end opens above the heated portion of the heater 3 and whose lower end projects outside the storage tank 1 and opens into atmospheric pressure. Although not shown in the figure, the storage tank 1 is always supplied with ammonia water in an amount that exceeds the amount consumed by vaporizing the ammonia water 2 (that is, the amount of ammonia steam mixed gas generated), and the excess ammonia water is is adapted to overflow from the upper end opening of the thin tube 6. The developing chamber 5 is provided with a gas distribution pipe (not shown) for uniformly distributing the ammonia-steam mixed gas introduced from the pipe line 4.

In the above system, when the heater 3 is turned on to heat and vaporize the ammonia water 2, an ammonia water vapor mixed gas is generated and introduced into the developing chamber 5 via the pipe 4. The pressure of the ammonia water vapor mixed gas in the storage tank 1 is from several millimeters to several tens of millimeters, which is generated by the pipe 4 and the gas distribution pipe in the developing chamber 5.
The pressure will be higher than atmospheric pressure due to the pressure loss of milliAg, but since the ammonia water 2 cannot go out of the storage tank 1 unless it passes through the thin tube 6, the liquid level of the ammonia water 2 will be higher than the atmospheric pressure. It is pushed down only on the inside, and is not pushed down at all on the outside of the thin tube 6 and is kept at the set water level H ₀ , so that the heater 3
The entire heated portion is kept completely submerged in the ammonia water 2.

In the above embodiment, the heater 3 has a spiral shape, but it is not limited to this, and the storage tank 1
The ammonia water vapor mixed gas generated inside the chamber 5 may be directly introduced into the developing chamber 5 as a developing gas.
If necessary, the ammonia concentration may be increased by, for example, rectification treatment and then introduced into the developing chamber 5.
It goes without saying that this invention can be modified in various ways to the above embodiments.

Since this device is constructed as described above, it is possible to completely prevent the pressure loss of the ammonia water vapor mixed gas from affecting the water level of the ammonia water in the storage tank outside the pipe member. Since it can be submerged in water, it has excellent effects such as preventing the heater from drying and eradicating failures such as heater disconnection due to dry heating.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing an example of the conventional one;
The figure is an explanatory diagram showing an embodiment of this invention. 1...Storage tank, 2...Ammonia water, 3...Sheath heater, 4...Pipe line, 5...Development chamber, 6...Thin tube.

Claims (1)

[Scope of utility model registration request] A heater is provided in a storage tank to which ammonia water in excess of consumption is supplied, and the heater heats the ammonia water to generate an ammonia water vapor mixed gas, and a pipe is connected to the ammonia water vapor mixed gas generating member. A dry type diazo copying machine equipped with a connected developing chamber, characterized in that a pipe member is provided in the storage tank, the upper end of which opens above the heater, and the lower end of which opens and protrudes outside the storage tank. Ammonia steam mixed gas generator.