JPH052923Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an aeration device for an automatic processor.

[Conventional technology]

A plurality of processing tanks filled with various processing solutions such as developing solution, bleaching solution, and fixing solution are arranged in the order of development processing steps, and photographic materials such as films are immersed in the processing solution in each processing tank in order for development processing. In automatic processing machines that perform this process, the processing liquid is circulated in order to equalize the temperature of the processing liquid within the processing tank. In addition, air is blown into each processing solution, for example, in the case of film development, in order to activate the bleaching solution and the fixing solution.

FIG. 3 shows a conventional example of a device for circulating and activating a processing liquid. In this device, a circulation pump 33 is connected to a circulation path 32 that communicates a processing tank 30 and a sub-tank 31, and the circulation pump 33 is operated to circulate the processing liquid between the processing tank 30 and the sub-tank 31. ing.

In addition, the upper and lower parts of the processing tank 30 and the aeration tank 34 are communicated with each other through passages 35 and 36, and an air pump 38 is connected to an air pipe 37 provided in the aeration tank 34, and the air pump 38 is operated to close the air pipe. Air is sent into the aeration tank 37, and the air is blown into the processing liquid in the aeration tank 34 from the lower end of the air pipe 37.

[The problem that the idea aims to solve]

By the way, in the above-mentioned apparatus, two pumps 33 and 38 are used, one for processing liquid circulation and one for aeration.
is required, resulting in large amounts of vibration and noise.
Further, each pump 33, 38 requires maintenance, and the cost is also high.

The object of this invention is to provide an easy-to-maintain, low-cost aeration device that reduces vibration and noise by allowing a single circulation pump to perform both circulation and aeration of a processing liquid.

[Means to solve the problem]

In order to solve the above problems, in this invention, the upper part of the processing tank, the sub tank, and
A passage connects the lower part of the processing tank and the aeration tank, and a circulation pump is connected to the communication passage connecting the sub-tank and the lower part of the aeration tank to send the processing liquid in the sub-tank to the aeration tank, The tip of the nozzle connected to the processing liquid outflow side end of the communication path, and the processing liquid inflow side of the supply pipe that is arranged coaxially with this nozzle and sends the processing liquid to be spouted from the nozzle to the aeration tank. A configuration was adopted in which the end of the air suction pipe was placed in a supply chamber within the mixing cylinder, one end of the air suction pipe was communicated with the side of the mixing chamber, and the other end of the air suction pipe was located in the atmosphere.

[Effect]

In the above configuration, when the circulation pump is driven, the processing liquid in the sub-tank flows through the communication path and is injected from the nozzle into the supply pipe. At this time, the pressure inside the mixing chamber decreases, so outside air is drawn into the mixing chamber through the air suction pipe and mixed with the processing liquid injected from the nozzle. The gas-liquid mixed fluid is injected from the supply pipe into the aeration tank to activate the processing liquid. The processing liquid in the aeration tank flows into the processing tank from the passage, flows upward within the processing tank, flows into the sub-tank from the passage, and is circulated within the sub-tank, the aeration tank, and the processing tank. Ru.

〔Example〕

An embodiment of this invention will be described below with reference to FIGS. 1 and 2.

As shown in the figure, the upper part of the processing tank 1 and the sub-tank 2 are communicated with each other through a passage 3, and the lower part of the processing tank 1 and the lower part of the aeration tank 4 are communicated with each other through a passage 5.

An inflow chamber 7 and an outflow chamber 8 are formed inside the aeration tank 4 by attaching a partition plate 6, and both chambers 7 and 8 communicate with each other above the partition plate 6. . The lower part of the inflow chamber 7 and the lower part of the sub-tank 2 are communicated with each other by a communication passage 9, and a circulation pump 10 is attached to the communication passage 9 to send the processing liquid in the sub-tank 2 to the inflow chamber 7.

A mixing cylinder 11 is connected to the end of the processing liquid outflow side of the communication passage 9, and a mixing chamber 1 inside the mixing cylinder 11
A nozzle 13 is connected to the end of the communication path 9 facing into the interior of the communication path 9. Further, the lower part of a supply pipe 14 is connected to the mixing cylinder 11, and the supply pipe 14 is arranged coaxially with the nozzle 13 so that the processing liquid injected from the nozzle 13 flows out into the outflow chamber 7. ing.

An air supply passage 15 is provided on the upper surface of the mixing cylinder 11 and communicates with the side of the mixing chamber 12.
The lower end of the air suction pipe 16 is connected to the upper part of the air intake pipe 5 .

The air suction pipe 16 rises within the inflow chamber 7, and a valve 17 is attached to the upper end facing outward from the upper opening of the aeration tank 4.
Further, an air inflow cylinder 18 whose top is open is connected to the upper end of the air suction pipe 16.
A plurality of air intake holes 19 are formed in the side portion of the air intake hole 19 . A porous sound absorbing member 20 is packed inside this air inlet tube 18 .

The aeration device shown in the embodiment has the above-mentioned structure, and its operation will be explained next.

Now, when the circulation pump 10 is operated, the processing liquid in the sub-tank 2 is sent into the communication path 9 and is injected from the nozzle 13 into the supply pipe 14 through the mixing chamber 12. The pressure inside the mixing chamber 12 decreases due to the injection, so when the valve 17 of the air suction pipe 16 is open, the air inlet pipe 1
External air is sucked into the mixing chamber 6 , flows into the mixing chamber 12 , and mixes with the processing liquid ejected from the nozzle 13 . This gas-liquid mixed fluid is supplied to the supply pipe 14
Since the processing liquid flows into the inflow chamber 7 of the aeration tank 4, the processing liquid is activated.

Further, the processing liquid that has flowed into the inflow chamber 7 flows upward within the inflow chamber 7 and flows into the outflow chamber 8.
From the outflow chamber 8, it flows into the processing tank 1 through the passage 5. Further, the water flows upward in the processing tank 1, flows through the passage 3 into the sub-tank 2, and is circulated between the sub-tank 2, the aeration tank 4, and the processing tank 1. Therefore, the temperature of the processing liquid can be made uniform. In addition, in this invention, the case for film development was used as an example, but
For paper development, the aeration target is:
Serves as bleaching solution and fixing solution.

[Effect of idea]

As described above, according to this invention, a circulation pump is installed in the communication path that communicates the sub tank and the aeration tank, and a nozzle connected to the end of the communication path on the outflow side of the processing liquid is injected from the nozzle. The end of the supply pipe on the processing liquid inflow side through which the processing liquid flows out into the aeration tank is located in a mixing chamber in the mixing cylinder, and the end of the air suction pipe is communicated with the side of the mixing chamber. Therefore, circulation of the processing liquid and aeration can be performed using one circulation pump. Therefore, the aeration device generates less vibration and noise, is easy to maintain, and has a simple configuration, making it possible to provide an aeration device at low cost.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the aeration device according to the invention, FIG. 2 is a sectional view of the same aeration section, and FIG. 3 is a sectional view showing a conventional aeration device. 1...Processing tank, 2...Sub tank, 3,5
...Aisle, 4...Aeration tank, 9...
Communication path, 10... Circulation pump, 11... Mixing cylinder,
12... Mixing chamber, 13... Nozzle, 14... Supply pipe, 16... Air suction pipe.

Claims (1)

[Scope of utility model registration request] The upper part of the processing tank and the sub-tank and the lower part of the processing tank and the aeration tank are communicated through passages, respectively, and the processing liquid in the sub-tank is aerated into the communication passage that communicates the sub-tank with the lower part of the aeration tank. A circulation pump to be sent to the tank is connected to the tip of a nozzle connected to the end of the processing liquid outflow side of the communication path, and a nozzle is arranged coaxially with the nozzle, and the processing liquid is spouted from the nozzle to the aeration tank. The end of the processing liquid inflow side of the supply pipe to be sent is placed in the supply chamber in the mixing cylinder, one end of the air suction pipe is communicated with the side of this mixing chamber, and the other end of the air suction pipe is located in the atmosphere. An aeration device for an automatic processor characterized by: