JPS62175987A - Air cleaner - Google Patents

Abstract

PURPOSE:To prevent an enclosed type electronic equipment from being contaminated by gas, etc., to prolong the life of a device, and to secure its high reliability by forming plural units by an absorbent containing unit, containing each absorbent whose function is different from each other, in each unit, and adsorbing and eliminating plural kinds of corrosive gases in the gas to be processed. CONSTITUTION:Absorbents of a moisture absorbent part 101, an acidic gas absorbent part 102, a neutral sulphur carbon compound containing gas absorbent part 103, an alkaline gas absorbent part 104, and an organic gas absorbent part 105 are contained in each unit 106 and each of them is partitioned, and arranged in a stripe shape in order of its numbers. A corrosive gas generated in a fixed magnetic disk device 1 is adsorbed efficiently by each absorbent part 101-105 of an air cleaner 10. Also, dust, etc. generated by each absorbent part 101-105 are removed by a filter 107. Moreover, air which flows into the inside of a device from the outside of the device through a breathing part 3a always passes through the air cleaner 10, as well, therefore, it is cleaned by the air cleaner 10, when it goes into the device, and after it has gone in.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an air purifier that is used in a sealed electronic device, such as a storage device of an electronic computer, such as a fixed magnetic disk device, etc., to purify the air. .

[Conventional technology]

Conventionally, the storage device of a large computer has been placed in a dedicated air-conditioned room as a peripheral device of the computer itself. In such a case, even if the outside air was contaminated, the air in the dedicated air-conditioned room was clean to the order of PPb and did not pose a problem for the storage device. However, in recent years, due to advances in technology, storage devices have become smaller and lighter; for example, Nikkei Electronics, September 23, 1985, p. 153 -
The fixed magnetic disk drives described on page 172 (See the rapidly increasing number of new 3.5-inch to 5.25-inch Winchester disk drives) are not housed in a dedicated air-conditioned room and are designed to be used in general environments. placed.

By the way, in general, literature: Pollution and Countermeasures Volume 21, 46
P521-P529 (1985) and Air Purifier No. 8
As described in Volume 2, Special Issue P27-P47 (1971; Purification of Gas Pollutants and Indoor Environment), air contains air pollutants caused by combustion of fuel and the like. These air pollutants include, for example, corrosive gases such as acid gases, alkaline gases, neutral sulfur and carbon-containing gases, and organic gases. Therefore, consideration has been required to reduce the effects of temperature, humidity, and corrosive gases contained in the atmosphere on sealed electronic devices such as storage devices.

FIG. 3(A) is a top view showing a conventional air cleaner applied to a fixed magnetic disk device as an example of a sealed electronic device, and FIG. 3(B) is a sectional side view thereof. In the figure, numeral 1 indicates a fixed magnetic disk device, which is composed of the following components. Reference numeral 2 denotes a box-shaped device case main body having an opening at the top, and 3 a transparent member, for example, which is attached to the device case main body 2 with a fastener (not shown) or the like, covering the upper opening of the device case main body 2. The lid 3a, which brings the device into a sealed state, is a breather hole made in the center of the lid 3. 4 is a motor; 5 is a magnetic disk mounted on the rotating shaft of the motor 4; 6 is a magnetic head for recording information on and reproducing information from the magnetic disk 5; 7 is a magnetic head for moving the magnetic head 6 in the radial direction of the magnetic disk 50; This is an actuator for moving the These components 4 to γ are housed in a casing consisting of an apparatus case body 2 and a lid 3. 8 is a filter provided on the device case main body 2 side of the lid 3 to block the breathing part 3a for removing dust so that the pressure inside the fixed magnetic disk device 1 is more positive than the external pressure, and S is an air purifier. It is housed in the device case body 2 and consists of a moisture adsorbent and a breathable adsorbent storage unit.

Next, the operation will be explained. The rotation of the motor 4 causes the magnetic disk 5 to rotate steadily. A magnetic head 6 driven by an actuator 7 records information on the magnetic disk 5 and reproduces information therefrom. On the other hand, the air flowing into the inside of the device from the outside through the breathing part 3a and the air inside the device have dust removed by the filter 8 and exist inside the device. This purified air is further carried by an air flow caused by the rotation of the magnetic disk 5, etc., and moisture such as moisture is removed by an air purifier 9, and the purified air is present in the apparatus as clean air.

By removing moisture in this way, it is possible to prevent condensation due to moisture inside the device due to temperature fluctuations outside the device. If condensation cannot be prevented, the magnetic head 6 and the magnetic disk 5 will attract each other due to condensation, leading to mutual destruction when the motor 4 is started.

[Problem that the invention seeks to solve]

Conventional air purifiers are configured as described above,
Moisture and dust in the air are removed, but 50~
At temperatures as high as 60°C, various gases are generated from the components of sealed electronic devices, and in a general environment, even at normal temperature levels, the external environment of sealed electronic devices (general Various gases from the environment (environment) flow into the inside of a sealed electronic device, and some of the internally generated gases and gases flowing in from the outside contain acidic gas, which is one of the causes of degrading the performance of the sealed electronic device. (SOx, NOx, etc.),
Alkaline gas (ammonia, amines, etc.).

Corrosive gases such as neutral sulfur carbon-containing gases (dimethyl sulfide, dimethyl disulfide, etc.) and organic gases (organic acids, etc.)
These corrosive gases cannot be removed, and the main body of the electronic device is corroded by the corrosive gas, resulting in a significantly shortened lifespan.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an air cleaner that can remove harmful gases and the like from inside a sealed electronic device.

[Means for solving problems]

In the air purifier according to the present invention, the adsorbent storage unit forms a plurality of units, each unit stores adsorbents with different functions, and adsorbs multiple types of corrosive gases in the gas to be treated. It was designed to be removed.

In addition to the above configuration, an air cleaner according to another aspect of the present invention is provided in the casing so as to close the breath hole of the casing housing the electronic device main body.

[For production]

The air cleaner according to the present invention uses multiple types of adsorbents, so it removes multiple types of air pollutants from the air.

The air cleaner according to another aspect of the present invention removes multiple types of air contaminants from the air flowing into the interior from the outside through the breath holes of the casing and from the air inside the casing, so that the air inside the casing is always clean. .

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a diagram in which an air purifier according to an embodiment of the present invention is applied to a fixed magnetic disk device as an example of a sealed electronic device. It is something. Reference numeral 10 denotes an air purifier, which is fixedly installed on the device case main body 2 side of the lid 3 so as to close the breather section 3a.

FIG. 2 is an enlarged sectional view of the air purifier 10 shown in FIG. 1. In the figure, 101 is a moisture adsorbent part made of silica gel, for example, which adsorbs moisture, and 102 is a moisture adsorbent part which adsorbs acid gas. For example, an acidic gas adsorbent part made of manganese-adhered activated carbon; 103 is a neutral sulfur-carbon compound-containing gas adsorbent part made of, for example, hydrogen bromide-impregnated carbon; 104 is a neutral sulfur-carbon compound-containing gas adsorbent part that adsorbs a neutral sulfur-carbon compound-containing gas; 104 is an alkaline gas-adsorbing part;
An alkaline gas adsorbent part 105 is made of, for example, an adsorbent known by the trade name Nionone; 105 is an organic gas adsorbent part made of, for example, coconut shell activated carbon, which adsorbs organic gas;
6 is an adsorbent storage unit 1, the above-mentioned adsorbent part 101~
105 adsorbents are housed in each unit and partitioned between them, and adsorbent parts 101 to 105 are arranged in a striped manner in numerical order. Of course, this adsorbent storage unit 106
is breathable and is made of a breathable material that allows air to pass therethrough or is structurally breathable. 1
07 is a filter for removing dust having a large number of holes with a diameter of 0.3 μm or less, and covers the above-mentioned adsorbent sections 101 to 105 with and without the adsorbent storage unit 106 interposed therebetween. The above-mentioned air cleaner 10 is composed of components indicated by reference numerals 101 to 107, and is fixed to the lid 3 via an adhesive or the like, for example.

Corrosive gas generated within the fixed magnetic disk device 1 is efficiently adsorbed by each adsorbent section 101 to 105 of the air cleaner 10, and dust etc. generated by each adsorbent section 101 to 105 is removed by a filter 107. removed.

In addition, the air that flows into the device from outside the device through the breathing part 3a (however, the pressure inside the device is positive compared to the outside pressure, so it is a small amount) must also pass through the air purifier 10, so the device Air purifier 10 before and after entering the room
It is thoroughly cleaned.

Table 1 below is for 60% relative humidity and sulfur dioxide gas.

Methyl sulfide, ammonia, acetic acid gas is about 6 2.51) I
) The results of gas analysis in the fixed magnetic disk drive were compared with the conventional one when the above fixed magnetic disk drive was maintained in a simulated atmospheric environment containing air purifier according to an embodiment of the present invention. This is shown in comparison.

Table 1 Conventional types only contain a dehumidifier, so
Although no effect of removing corrosive gases other than moisture has been observed, the present invention also uses the acidic gas adsorbent section 102K for sulfur dioxide gas.

Methyl sulfide is a neutral sulfur carbon compound-containing gas adsorbent part 10
3, ammonia is alkaline gas adsorbent part 104K,
Since acetic acid is adsorbed and removed by the organic gas adsorbent section 105, all corrosive gases contained in the apparatus in the simulated environment at the beginning are removed. Further, since the entire air cleaner 10 is covered with a filter 107, dust generated from each adsorbent itself is captured there and does not contaminate the inside of the fixed magnetic disk device 1.

In addition, since the air purifier 10 is installed so as to block the breathing section 3a through which air from the outside is most likely to flow in, corrosive gases contained in the air flowing in from the outside are removed when they enter the fixed magnetic disk device 1. When the air enters the air, it is immediately removed by the air purifier 10.

In the above embodiment, the breathing part 3a is widened as shown in FIG. 2, but the breathing part 3a may be narrowed to the position shown by the broken line, for example.

Further, in the above embodiment, an example of a storage device installed in a fixed magnetic disk device is shown, but it can be similarly applied to air cleaning in an optical disk device, and the same effects as in the above embodiment can be obtained. Furthermore, the air purifier according to the present invention can be applied in the same manner as the above embodiment to purify the air in any closed space in which other electronic device bodies are housed in the casing, and can have the same effects as the above embodiment. play.

In the above description, the adsorbents include a moisture adsorbent, an acidic gas adsorbent, and a neutral sulfur carbon compound-containing gas adsorbent.

Although an alkaline gas adsorbent and an organic gas adsorbent are used, a plurality of adsorbents among them may be appropriately selected and used in the air purifier without using all of them, and a filter is not necessarily required. is not required either.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of corrosive gases among moisture, acid gas, alkaline gas, neutral sulfur carbon compound-containing gas, and organic gas can be appropriately removed. This has the effect of ensuring a long life and high reliability of the device without contaminating the inside of the electronic device with gases that cause corrosion.

[Brief explanation of drawings]

FIG. 1(A) is a front view of an air purifier according to an embodiment of the present invention applied to a fixed magnetic disk device, and FIG. 1(B)
is a cross-sectional side view of Fig. 1 (A), Fig. 2 is an enlarged sectional view of the air purifier portion of Fig. 1, and Fig. 3 (A) is a diagram of a fixed magnetic disk drive incorporating a conventional air purifier. Front view, Figure 3 (
B) is a cross-sectional side view of FIG. 3(A). In the figure, 1 is a sealed electronic device (fixed magnetic disk device), 2 is the device case body, 3 is a lid, 3a is a breather hole, 5 is a disk, 6 is a head, 10 is an air cleaner, 10
1 is a moisture adsorbent part, 102 is an acid gas adsorbent part, 103
1 is a neutral sulfur carbon compound-containing gas adsorbent part, 104 is an alkaline gas adsorbent part, 105 is an organic gas adsorbent part, 1
0-6 is an adsorbent storage unit, and 10T is a filter. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent applicant: Mitsubishi Electric Corporation (2 others) - Figure 1 (A) Figure 1 CB) 1: Fixed 4-view desk Isk thorn placement 2: 剋, Placement case $-1 3: 11 3a: Menu, pumping valve 5: stone & floor space 9 6: to side hole 7 do 1o: land χ 51 dispute item 2nd figure 107: fuzuru figure 3 (A) b Procedural amendment (self-motivated)

Claims (6)

[Claims] (1) In an air purifier including a breathable adsorbent storage unit and an adsorbent that is stored in the adsorbent storage unit and adsorbs the gas to be treated, the adsorbent storage unit is formed into a plurality of units, and the adsorption agent is An air purifier characterized in that a plurality of types of agents with different functions are used and each type is stored in the unit. (2) As the adsorbent, at least two of a moisture adsorbent, an acidic gas adsorbent, a neutral sulfur carbon compound-containing gas adsorbent, an alkaline gas adsorbent, and an organic gas adsorbent are used. An air purifier according to claim 1, characterized in that: (3) The air purifier according to claim 1 or 2, wherein the adsorbent storage unit is covered with a filter having pores with a pore diameter of 0.3 μm or less. (4) An adsorbent forming a plurality of air-permeable units in a sealed electronic device comprising a sealed casing having a breath hole communicating with the outside and an electronic device main body housed within the casing. An air purifier comprising a storage unit and a gas-adsorbing adsorbent that is stored in each unit and has a mutually different function, and is provided in the casing so as to close the breath hole. (5) As the adsorbent, at least two of a moisture adsorbent, an acidic gas adsorbent, a neutral sulfur carbon compound-containing gas adsorbent, an alkaline gas adsorbent, and an organic gas adsorbent are used. An air cleaner according to claim 4, characterized in that: (6) The air purifier according to claim 4 or 5, wherein the adsorbent storage unit is covered with a filter having pores with a pore diameter of 0.3 μm or less.