SU815763A1 - Device for filtration of air and cooling external storages - Google Patents

Description

The invention relates to instrumentation, and in particular to the technique of magnetic recording, and can be used in magnetic recording devices with disk storage media.

Known dustproof device used in disk storage media containing a closed volume for placement of disk magnetic, θ media, an electric motor with an impeller, air ducts and filters. The device provides for the creation of excess pressure of purified air in a confined space, preventing dust particles from the environment 15 from entering the surface of magnetic media £ 1].

However, the use of such a device requires the introduction of an additional 20 cooling system for the electronic components of the drive, which leads to an increase in its dimensions and energy consumption.

A device is known for filtering __ air 'and cooling external storage devices, comprising pre-filters and fine filters, an electric motor, a main impeller and air ducts mounted on its shaft.

Due to the use of a single system of dust protection and cooling of the electronic components of the drive in the device, a reduction in the size and energy consumption of f2j is ensured.

However, the device does not provide sufficient operational efficiency due to the fact that the resistance to air passage of the fine filter exceeds the resistance to air passage of the free space of electronic units, which leads to a decrease in the amount of air supplied to the package of magnetic disks and deterioration of dust protection.

The purpose of the invention is to increase the efficiency of the device.

This goal is achieved by the fact that the device is equipped with an additional impeller mounted on the motor shaft coaxially with the main, intermediate chamber located between these impellers, made in its wall, adjacent to the duct connecting the preliminary and fine filters, a calibrated hole, and a shutter, installed with the possibility of adjustable overlap of this hole, while, the specified camera is connected via an air duct to the pre-filter.

The drawing shows one of the possible embodiments of the device.

The device contains pre-filters 1 and fine 2 air purification $, a fan consisting of an electric motor 3, a main impeller 4 high pressure and low flow rate and an additional impeller 5 low pressure and high flow rate, an intermediate chamber 6 located between the impellers 4 and 5 , with a calibrated hole 7 made in its wall, a shutter 8 made in the form of a disk with a conical bevel along the outer diameter, mounted ³ with the possibility of movement along the shaft of the electric motor 3, block 9 c is placed m inside it with a package of magnetic disks and a lid 10, as well as a cooled block 11 with electronic 20 nodes.

Block 9 is connected through the Fine filter 2 by means of air ducts 12-14 with a pre-filter 1, and by air ducts 25 12 and 13 with a calibrated hole 7 of intermediate kg. Measure 6. The cooled block 11 is connected to the Filter 1 of the pre-filter through intermediate chamber 6 by ducts 15 and 16.

The device operates as follows.

When the drive is operating, the cover 10 of block 9 is closed and the impeller 4 through the air ducts 12-14 through the Fine filter 2 delivers purified air to the block 9. In this case, excess air leaves through the leaks of the cover 10, which prevents the penetration of dust particles from the ambient air 40 ha. The impeller 5 supplies air from the Pre-filter 1 through the air ducts 15 and 16 through the intermediate chamber 6 to the cooling unit 11. The damper 8 closes the calibrated hole 45 so that the resistance to air passage in the gap is equal to the pressure drop in the air duct 13 and the intermediate chamber 6 . In this case, air from the duct 13 does not ed enters the intermediate chamber 6.

As the pre-filter 1 becomes dirty, the pressure in the duct 15 and in the intermediate chamber 6 decreases. In this case, air from the air duct 13 begins to enter the intermediate chamber 6 and then through the impeller 5 to the air duct 16, making up for the decrease in air flow for cooling the unit 11. The impeller 4 provides greater pressure at a low flow rate, as a result of which the resistance of the pre-filter 1 does not increase changes its air flow.

Thus, in the operating mode, almost constant air for cooling is maintained at a new amount of block 11 and sufficient boost of clean air is created in block 9.

The proposed device allows through the use of a balanced system of dust protection and cooling of disk drives to increase the regeneration period of pre-filters without compromising the quality of the device, as well as to increase the reliability of drives while reducing overall dimensions and power consumption.

Claims (2)

The invention relates to instrumentation, in particular, to a magnetic recording technique, and can be used in magnetic recording apparatus with disk information carriers. A dust protection device used in disk storage devices of information, containing a closed volume for accommodating disk-magnetic carriers, electric motor with a roller, air ducts and filters, is known. The device provides an overpressure of purified air in a closed volume, which prevents dust particles from the environment from entering the surface of magnetic carriers. However, the use of such a device requires the introduction of an additional cooling system for electronic storage units, which leads to an increase in its dimensions and power consumption. A device for air filtration and cooling of external comforters is known, which contains prefilter and fine filters, an electric motor, a main impeller mounted on its shaft and in the feeders. Due to the use in the device of a unified system of dust protection and cooling of the electronic components of the storage device, a reduction in size and power consumption is ensured 2. However, the device does not provide sufficient operational efficiency due to the fact that the resistance of the fine filter air to the air flow exceeds the resistance of the free space of the electronic units to air, which leads to a decrease in the amount of air supplied to the package of magnetic disks and deterioration of dust protection. The purpose of the invention is to increase the efficiency of the device. The goal is achieved by the fact that the device is equipped with an additional impeller mounted on the motor shaft coaxially with the main intermediate chamber located between said impellers with a wall in its wall adjacent to the air duct, a preliminary filter and a fine cleaning filter, a calibrated orifice, and a flap installed with the possibility of an adjustable overlap of this aperture, wherein the said chamber is connected by means of an air duct to a pre-filter. The drawing shows one of the possible variants of the device. The device contains filters of preliminary 1 and 2 fine air purification, a fan consisting of an electric motor 3, a main impeller 4 of high pressure and low consumption and an additional impeller 5 of low pressure and high flow, intermediate chamber 6 located between the impellers 4 and 5, with in its wall with a calibrated orifice 7, a damper 8, made in the form of a disk with a conical bevel on the outer diameter, mounted for displacement along the shaft of the electric motor 3, block 9 with the inside When he magnetic disk pack and krikoy 10, as well as the cooling unit 11 with the electronic assemblies. Unit 9 is connected through Liltre 2 fine cleaning by the representative of air ducts 12-14 with pre-filter 1, and by means of air ducts 12 and 13 with a calibrated orifice 7 of intermediate chamber 6. The oxidative unit 11 is connected to the pre-filter 1 through the intermediate chamber 6 by means of air ducts 15 and 16. The device operates as follows. When the accumulator krytak 10 of the block 9 is closed and the impeller 4 through the ducts 12-14 through the filter 2 fine purifies the cleaned air into the block 9. In this case, excess air escapes through the leakiness of the dust 10, which prevents the penetration of dust particles from the surrounding air. The impeller 5 supplies air from (1) Iltra 1 pre-cleaning through ducts 15 and 16 through the interstitial chamber 6 to the cooled block 11. The shutter 8 blocks the calibrated orifice 7 so that the resistance to the passage of air in the gap is equal to the pressure differential in the air duct 13 and intermediate chamber 6. At the same time, air from the duct 13 does not enter the intermediate chamber 6. As the pre-cleaning filter 1 becomes soiled, the pressure in the duct 15 and in the intermediate chamber 6 decreases. At the same time, the air from the air guide 13 starts to start to enter the intermediate chamber b and then through the impeller 5 to the duct 16, to reduce the air flow for cooling the unit 11. The impeller 4 provides more pressure at a lower flow rate, resulting in an increase in pre-filter resistance 1 changes its air flow. Thus, an almost constant amount of air is maintained in the operating mode for cooling the block 11 and a sufficient boost is created in the clean air in block 9. The proposed device allows, through the use of a balanced system of dust protection and cooling of disk storages, to increase the period of pre-filter regeneration without degrading the quality performance of the device, as well as improve the reliability of drives with a decrease in. overall dimensions and power consumption. Apparatus of the Invention A device for filtering air and cooling external storage devices, comprising pre-and fine Liltrg, an electric motor, a main impeller mounted on its shaft, and air ducts, characterized in that it is equipped with an additional impeller mounted on the shaft to increase the efficiency of the device. electric motor coaxially with the main, intermediate chamber located between the said impellers, with its wall adjacent to the duct connecting the ltry preliminary and fine purification, calibrated orifice and the valve mounted for controlled overlap of the openings, wherein, said chamber is coupled with the duct via prefilter. Sources of INF (-) rM.; 1TIONS taken into account in the examination 1. Japanese Patent No. 49-22646, cl. 102 E 23, 1974. 2. Electromechanical Design, 197 ;, 19, P 3, p. 20-23 (prototype).