JPH0391185A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To prevent corrosion, head crush, and a start imposibility phenomenon by providing a temperature and humidity control means which controls atmospheric temperature and humidity in a closed vessel to a prescribed range based on detection values of a temperature sensor and a humidity sensor. CONSTITUTION:Atmospheric temperature and humidity in a closed vessel 1 are detected by a temperature and humidity sensor 10 and are controlled to values in a prescribed range based on detected values by a temperature and humidity control means 8. Consequently, though the temperature of the outside air falls or the operation is stopped to reduce the temperature in the closed vessel 1, atmospheric temperature and humidity in the closed vessel 1 are controlled to values in the prescribed range where a dew condensation phenomenom is difficult to occur, and dew condensation is prevented. Thus, the occurrence of corrosion, head crush, or the start impossibliity phenomenon is prevented.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a magnetic disk device mainly used in information processing equipment, in which a magnetic disk disk and a magnetic head are housed in an airtight container maintained in a substantially hermetically sealed state. The present invention relates to a magnetic disk device containing the following.

(Prior Art) Conventionally, some magnetic disk devices of this type use a magnetic disk assembly. Here, a magnetic disk assembly is a unit that combines and integrates a magnetic disk and an axial head mechanism and is housed in an airtight container as a replacement unit, and a part of the magnetic head positioning is installed in this replacement unit. It refers to what is included.

(Problem U to be solved by the invention) However, in conventional magnetic disk drives, the sealed container is not completely airtight, so outside air enters the sealed container due to temperature changes during use. A so-called breathing phenomenon may occur, and the temperature of the atmosphere inside the closed container may rise. Another drawback is that condensation may form inside the container when it is left to cool down after use. This condensation can cause corrosion on the magnetic disk,
The magnetic head is attracted to the magnetic disk and the magnetic head digs into the magnetic disk, which is the so-called head crash, and the magnetic disk becomes unable to rotate, causing an inability to start. Therefore, the conventional magnetic disk drive suffers from the above-mentioned corrosion, head crash, and inability to start, resulting in a disadvantage that the reliability of the magnetic disk drive decreases.

It is an object of the present invention to solve the above-mentioned drawbacks, and it is possible to suppress the occurrence of dew condensation inside a closed container, thereby preventing corrosion, head crash, and failure to start. An object of the present invention is to provide a magnetic disk device that can improve reliability.

(Means for Solving the Problem) The above problem is solved by a magnetic disk drive in which a magnetic disk disk and a magnetic head are housed in a closed container maintained in a substantially hermetically sealed state, in which the temperature of the atmosphere inside the closed container is a temperature sensor that detects the humidity of the atmosphere in the sealed container, a humidity sensor that detects the humidity of the atmosphere in the sealed container, and a temperature and humidity of the atmosphere in the sealed container to be within a predetermined range based on detected values of the temperature sensor and the humidity sensor. This can be solved by providing a temperature and humidity control means for controlling the temperature and humidity.

(Function) According to the present invention, the temperature and humidity of the atmosphere inside the closed container are detected by the temperature sensor and the humidity sensor, and the temperature and humidity of the atmosphere inside the closed container are controlled by the temperature and humidity control means based on these detected values. Controlled to a value within a predetermined range. Therefore, even if the outside air temperature drops or the temperature of the sealed container decreases due to operation being stopped, the temperature and humidity of the atmosphere inside the sealed container are controlled to a predetermined range of values that prevent dew condensation. It can be prevented. As a result, it is possible to prevent corrosion of the magnetic disk disk, head crash between the magnetic head and the magnetic disk disk, and inability to start the magnetic disk disk due to condensation. can.

Therefore, the reliability of the magnetic disk device is significantly increased.

(Example) An example of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing the all-pair configuration of this embodiment.

In this embodiment, a plurality of magnetic disk disks 2 are supported by a rotating shaft 3 and housed in an airtight container 1 . A plurality of magnetic heads 4 are provided facing the surface of the magnetic disk disk 2 in the closed container 1, and each magnetic head 4 is supported by a geo-air head positioning device 5.

A reflux path 6 is formed in the closed container 1, and the reflux path 6
A constant temperature and humidity air circulation system 28 is provided as the temperature and humidity control means of the present invention. The constant temperature and humidity air circulation device 8 maintains the atmosphere inside the closed container 1 at a predetermined temperature and humidity, and sends the air thus adjusted into the closed container 1 through a potpourri 9. At a predetermined position in the airtight container 1, there is a temperature and humidity sensor 1 as a temperature sensor and humidity sensor of the present invention for detecting the temperature and humidity of the atmosphere.
0 is provided facing into the closed container 1.

The output of the temperature/humidity sensor 10 is input to the constant temperature/humidity air circulation device 8, and the constant temperature/humidity air circulation device 8 is driven according to the temperature and humidity detected by the temperature/humidity sensor 10.

It is most desirable to keep the constant temperature and humid air circulation device 8 running all the time.However, when considering economic aspects, it is preferable to drive the constant temperature and humid air circulation device 8 immediately before starting the magnetic disk drive. A sufficient effect can be obtained by using the temperature and humidity sensor 10 to maintain the atmosphere inside the WR8 container 1 at a predetermined temperature and humidity.

In this embodiment, a constant temperature and humidity air circulation device 8 is driven to generate a sealed container 1 in which a magnetic disk disk 2 and a magnetic head 4 are housed.
The atmosphere inside is controlled to a predetermined temperature and humidity. Therefore, even if the operation is stopped, the temperature and humidity of the atmosphere are controlled within a predetermined range where dew condensation is unlikely to occur, and dew condensation can be prevented.

As a result, corrosion of the magnetic disk disk 2, a head crash between the magnetic head 4 and the magnetic disk disk 2, or an inability to start the magnetic disk disk 2 due to condensation can be prevented. can do.

Therefore, the reliability of the magnetic disk drive is significantly increased.

(Effects of the Invention) As explained above, according to the magnetic disk device of the present invention, q! ! Prevents condensation from occurring inside closed containers,
As a result, corrosion, head crashes, and inability to start can be prevented, and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing the overall configuration of an embodiment of the present invention. 1... airtight container, 2... magnetic disk disk, 3...
Rotating shaft, 4... Magnetic head, 5... Magnetic head positioning device, 6... Reflux path, 8... Constant temperature and humidity air circulation device, 9... Pump, 10... Temperature and humidity sensor.

Claims (1)

[Claims] In a magnetic disk drive in which a magnetic disk disk and a magnetic head are housed in an airtight container maintained in a substantially airtight state, a temperature sensor detects the temperature of an atmosphere in the airtight container, and an atmosphere in the airtight container. and a temperature/humidity control means for controlling the temperature and humidity of the atmosphere within the sealed container to a predetermined range based on the detected values of the temperature sensor and the humidity sensor. magnetic disk device.