JP2008093648A - Foreign matter elimination of submerged electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress an adverse effect on an electronic circuit element without disassembling submerged precision electronic equipment and to enable a water component entered into the inside thereof and a foreign matter contained in the water component to be eliminated. <P>SOLUTION: The submerged precision electronic equipment A is arranged in an airtight container 8, ultrapure water is put into the airtight container 8 from an ultrapure water tank 11, and flow-in and flow-out valves 12, 13 are controlled by a signal from an electric resistance sensor 14. The precision electronic equipment is cleaned by an ultrasonic transmitter 16 while switching a plurality of ultrasonic vibrators B and the ultrapure water is discharged. Thereafter, outside air inflow control is carried out to maintain optimum pressure in the airtight container through the control of a discharge pump 1, an outside air introduction control solenoid valve 3, and a discharge control solenoido valve 2 by detecting the inside of the airtight container 8 with a barometric sensor 4. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention takes out moisture and foreign matter from submerged precision electronic equipment and restores the electronic circuit.

  In a submergence accident of precision electronic equipment due to a conventional accident, it is necessary to repair the electronic equipment in order to collect the data left inside from the submerged electronic equipment. Therefore, it was necessary to disassemble and clean and dry clean it, and there was a limit to disassembly and it was difficult to remove from the undissolvable part.

  To recover internal data safely from conventional submerged electronic equipment, the recovery rate of equipment and internal data improves as soon as foreign matter and moisture are removed. The remaining liquid and foreign matter are electrically conductive substances. However, most of the precision electronic devices in recent years are extremely difficult to disassemble and clean and require a long time to operate. Suppresses adverse effects on circuit elements.

In the present invention, in order to achieve the above object, foreign matter and water removal are performed in a short time so as not to adversely affect the electronic circuit.
The precision electronic equipment has a microprocessor inside and operates with weak power to save power. The signal lines of the electronic control chip are very narrow and conductive when moisture or foreign matter enters between them. In many cases, it will cause malfunction and damage.
For this purpose, it is necessary to remove moisture and foreign matter inside. There is also a method of evaporating by raising the temperature of the equipment to remove moisture, so the temperature of the equipment can be raised to evaporate, but because the degree of sealing is high, condensation occurs and the purpose cannot be achieved in a short time, which makes the electronic equipment confidential. A method of removing moisture by lowering the atmospheric pressure inside a container is adopted. At this time, liquid crystal display devices that have been used in large quantities in recent years have organic liquid crystals sandwiched between glass plates and protect them. Therefore, it is protected by a sealing material and a spacer. Therefore, simply reducing the air pressure will destroy the element. In order to eliminate the above adverse effects, the pressure of the hermetic container is sensed by a pressure sensor in the hermetic container and the pump is controlled to reduce the atmospheric pressure. In addition, a valve is provided to control the atmospheric pressure, and the introduction of outside air is also measured.

  Submerged electronic devices often contain foreign substances other than moisture, and foreign substances mixed with liquid often have electrical conductivity, and are cleaned with ultrasonic elements to remove them. It is difficult to remove particles that have entered fine parts of precision electronic equipment with a vibrator with a single oscillation period. In order to solve this problem, washing is performed while switching between multiple frequency vibrators. Ultra-pure water is used to protect the circuit. During cleaning, new ultra-pure water is always detected by the electric resistance sensor so as not to adversely affect the electronic circuit due to the conductivity of foreign matter. Measure.

  As described above, the removal of foreign matter moisture in a submerged electronic device according to the present invention removes the adverse effects on the electronic circuit without disassembling the foreign matter and moisture in a short time, and smoothly collects the electronic data inside the electronic device and the electronic device. It becomes possible to do.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.

  In the figure, reference numeral 8 denotes an airtight container in which the precision electronic device A submerged is disposed. When foreign substances other than water are mixed, ultrapure water is put into the container from the ultrapure water tank 11 and a plurality of foreign substances are placed. Cleaning is performed by the ultrasonic transmitter 16 while switching the ultrasonic transducer B. In the cleaning process, foreign matter is mixed with ultrapure water and conductivity is generated. This state is detected by the electrical resistance sensor 14 in the container, and the controller 15 The amount of inflow is controlled by the electromagnetic valve 12 and the discharge electromagnetic valve 13, and optimization is performed. Next, the process enters the process of discharging ultrapure water and removing moisture remaining in the electronic device. For this purpose, the outside air introduction control electromagnetic valve 3 and the discharge control electromagnetic valve 2 are controlled by a control device 5 that controls the atmospheric pressure from an atmospheric pressure sensor 4 that arranges an exhaust pump 1 and detects the internal atmospheric pressure. Maintain optimal pressure in the vessel, outside air humidity from the ambient air filter 7, to flow from the air conditioner 6 which is controlling the temperature.

It is the sectional side view which showed the moisture and the foreign material removal apparatus of the submerged electronic device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Exhaust electric pump 2 Exhaust control solenoid valve 3 Outside air introduction control solenoid valve 4 Pressure sensor in airtight container 5 Air pressure controller inside airtight container 6 Air conditioner 7 Outside air introduction filter 8 Airtight container 11 Ultrapure water tank 12 Inflow control solenoid valve 13 Discharge control Electromagnetic valve 14 Electric resistance sensor 15 Ultrasonic transmitter controller 16 Ultrapure water flow controller A Precision electronic equipment to be processed B Ultrasonic transducer

Claims (1)

In order to remove foreign matter that entered the submerged electronic device, multiple ultrasonic transducers with different frequencies are placed and multi-scan is applied to clean the foreign matter inside the electronic device. The cleaning liquid uses ultra-pure water that is not conductive.However, foreign substances are mixed in the cleaning process, and conductivity is generated.However, in order to always ensure proper insulation while monitoring the electrical conductivity with the sensor, Control the flow state.
In order to remove the residual cleaning liquid after the cleaning is completed, a negative pressure is applied by the exhaust pump to vaporize, but the electronic components are damaged by applying a negative pressure too much, so the sensor detects the negative pressure and controls it by computer control. In order to prevent damage to electronic equipment.
An air conditioner is installed in the container for storing the electronic equipment to which the exhaust pump is connected to allow the outside air to flow in from the outside. In order to promote vaporization in a container for processing equipment, the pressure is lowered, so that heat energy is also heated by electromagnetic waves in the far infrared region.

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