JPH11190431A - Protective device of electric, electronic or other mechanical device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold the inside of a device under high pressure, and to prevent infiltration of moisture/dust by arranging a through hole in a casing of the device, and communicating a pressure atmospheric pressure source such as a compressor with this through hole through an opening/closing valve and a dryer. SOLUTION: Atmospheric pressure of a pressure atmospheric pressure source 6 is increased by 0.02 to 1.00 atmospheric pressure more than one atmospheric pressure of atmospheric pressure of a chamber to hold a flow of a small quantity of gas. Since the inside of a device is held under high pressure, air is only blown off from any place of the upper/lower/left/right sides of a device 1 to prevent infiltration of moisture/duct into the device 1 from outside. An effect capable of checking the degradation of a part in the device 1 can be fulfilled when inert gas such as nitrogen and carbon dioxide gas is used as the pressure atmospheric pressure source 6 instead of air. Dew condensation can be reduced when an inner box is arranged in a casing 2 of the device 1 through the vacuum heat insulating part. The dew condensation can be prevented while cooling a largely heat radiating part when faced to the largely heat radiating part by adding a hose extending from a through hole 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various electric devices such as switches, operation panels, control panels, switchboards, electric motors, and generators, various electronic devices such as televisions, videos, computers, and other transmissions and gears. And protection devices for various mechanical devices such as bearings.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned electric, electronic or other mechanical devices are used in places where water is used in any unspecified portion, such as food factories and pharmaceutical factories.

[0003]

However, the water vapor and washing water splashes into the apparatus together with flammable powders such as food powders, and forms dew condensation and a film to cause electric leakage and ignition, which is severe. If an explosion occurs. In addition, there has been proposed a device in which an inverter and a condenser in the device are air-cooled by a ventilation fan, but this is not good because it sucks in moisture, powder and the like. For example, as shown in FIG.
When the switch 22 fitted to the switch 9 is operated by a screw, the periphery of the rubber cover 21, the panel 19 and the switch 22 are operated.
Water penetrates from the gap between the terminals 24 and 2 through the gap 23.
Causes an accident such as a short circuit of 4. The present invention has been made in view of such circumstances, and is intended to maintain the inside of an apparatus at a high pressure and prevent moisture, dust, and the like from entering the inside of the apparatus.

[0004]

According to the present invention, a through hole 3 is provided in a housing 2 of an electric, mechanical or other device 1 and the through hole 3 is provided with an opening / closing valve 4 and a drier 5 for a compressor or the like. It is a protection device for electric, electronic or other mechanical devices connected to the pressure and pressure source 6. The pressure and pressure source 6
Is higher than 1 atm of the chamber by 0.02 to 1.00 atm.

[0005]

FIG. 1 shows the configuration of a first embodiment of the present invention.
The casing 2 is provided with a through hole 3, and the through hole 3 is connected to a pressure / pressure source 6 such as a compressor via an on-off valve 4, a mist trap (reducing valve) 10, and a dryer 5. The pressure of the pressure and pressure source 6 is set to be higher than 1 atm of the chamber by 0.02 to 1.00 atm to maintain a small flow of gas.

Next, the operation of this device will be described. Since the inside of the apparatus is maintained at a high pressure, the air only blows out from the upper, lower, left and right portions of the apparatus 1 as shown in FIG. 2, so that moisture, dust and the like are prevented from entering the apparatus 1 from outside. It is. When an inert gas such as nitrogen or carbon dioxide is used for the pressure / pressure source 6 instead of air, there is an effect that deterioration of components in the apparatus 1 can be prevented.

FIG. 3 shows a second embodiment of the present invention. When the inner box 9 is provided on the casing 2 of the apparatus 1 via the vacuum heat insulating portion 12, the dew condensation is small.

FIG. 4 shows a third embodiment of the present invention. If a hose 13 extending from the through hole 3 is added to the casing 2 of the device 1 and the component 13 is exposed to the component 14 which emits a lot of heat, a component which emits a lot of heat is obtained. 14 can be cooled and dew condensation can be prevented, which is effective.

[0009]

As described above, in the present invention, since the pressure of the apparatus 1 is higher than the atmospheric pressure of the chamber, the invasion of moisture, dust and the like into the apparatus is prevented, and the dew condensation and film formation in the apparatus 1 are prevented. To prevent electrical leakage, fire or explosion.

[0010]

[Brief description of the drawings]

FIG. 1 is a schematic explanatory view showing a configuration of an apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic explanatory view of a state of blowing air.

FIG. 3 is a schematic explanatory view showing a configuration of an apparatus according to a second embodiment of the present invention.

FIG. 4 is a schematic explanatory view showing a configuration of an apparatus according to a third embodiment of the present invention.

FIG. 5 is a schematic explanatory diagram of a conventional switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Machine or other apparatus 2 Housing 3 Through-hole 4 On-off valve 5 Dryer 6 Pressure and pressure source

Claims (2)

[Claims] 1. A through hole (3) is provided in a housing (2) of an electric, mechanical or other device (1), and the through hole (3) is provided through an on-off valve (4) and a drier (5). Protection device for electrical, electronic or other mechanical devices connected to a pressure and pressure source (6) such as a compressor. 2. The pressure of said pressure and pressure source (6) is 0.02
2. A protection device for an electric, electronic or other mechanical device according to claim 1, wherein the pressure of the room is set to be higher than 1 atmosphere by 1 to 1.00 atmosphere.