JPH05205461A - Hard disk device - Google Patents

Abstract

PURPOSE:To operate a device immediately after power source has been thrown to 'on' by heating automatically the device with a heater and preventing over- cool when the temperature of a hard disk device main body is lowered at the time of turning off a main power source. CONSTITUTION:The ambient temperature of the hard disk device main body 7 is measured with a temperature sensor 8 when the main power source is turned off and when the measured temperature is a set temperature or below, the heaters 9a-9c arranged on the circumference of the hard disk device main body 7 are energized by the supply of sub power source 3 and the hard disk device main body 7 is heated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hard disk device built in electronic equipment such as a personal computer.

[0002]

2. Description of the Related Art When an electronic device with a built-in hard disk device is used in a cold area, if it is left for a long time with the main power supply of the electronic device turned off, the surface of the disk, which is a storage medium of the hard disk device, will become too cold because The write / read head freezes up, and the disk expands and contracts to cause a read / write error called thermal off track, which is one of the causes of abnormalities in electronic devices.

Therefore, conventionally, a heater is arranged around the main body of the hard disk device, and when the main power source of the electronic equipment is turned on, the heater is energized for a certain period of time to heat the main body of the hard disk device and then operate. A technique for preventing an abnormal occurrence due to the hard disk device being too cold has been known.

[0004]

However, in the conventional electronic equipment having the built-in hard disk drive with a heater, the electronic equipment must be operated after the main power supply is turned on and a certain time required for heating the hard disk drive has elapsed. could not.

Therefore, the present invention is intended to provide a hard disk device which is not cooled for a long time by the outside air or the like even if the main power supply is turned off, and can be operated immediately after the main power supply is turned on. Is.

[0006]

According to the present invention, there is provided a hard disk drive main body driven by supply of a main power source, a temperature sensor for measuring an ambient temperature of the hard disk drive main body, and a hard disk drive main body. When the main power supply is turned off, the heater, the sub power supply that operates when the main power supply is turned off, and when the main power supply is turned off, the temperature measurement value is read by the temperature sensor. And heating control means for heating.

[0007]

With the hard disk drive having the above-described structure, the ambient temperature of the hard disk drive body measured by the temperature sensor is read when the main power supply is off. If the measured temperature is equal to or lower than the set temperature, the heater is energized by the supply of the sub power source to heat the hard disk device body.

Therefore, even if the main power supply is turned off, the hard disk device body will not be cooled to the set temperature or lower for a long time by the outside air or the like. As a result, there is no need for preheating after the main power is turned on, and it can operate immediately.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the main configuration of the apparatus of this embodiment. In the figure, L1 and L2 are power supply lines of the commercial AC power supply 1, and these power supply lines L1 and L2
The main power source 2 and the sub power source 3 are connected in parallel with each other.
A first switch 4 is interposed on the main power source 2 side of the power source line L1, and a second switch 5 interlocking with the first switch 4 in reverse operation is interposed on the sub power source side 3. .. Therefore, when the first switch 4 is closed, the second switch 5 is opened and the main power supply 2 is turned on and the sub power supply 3 is turned off. Conversely, when the first switch 4 is opened, the second switch 5 is closed and the main power supply 2
Is turned off and the sub power supply 3 is turned on. The power line L
A fuse 6 is interposed in the common portion of 1.

The main power source 2 has power source lines L1 and L.
+ 5V, +12 from the commercial AC power supply input via 2
Various DC power supplies such as V are generated and supplied to each unit including the hard disk device main body 7.

The hard disk device body 7 includes a disk as a storage medium and a read / write head which are integrated and sealed from the outside air. A sensor 8 for temperature measurement is provided around the hard disk device body 7, and three heaters 9a, 9b, 9c are arranged at appropriate positions. By the way, since the disk portion of the hard disk device body 7 is almost completely sealed, a large-capacity heater is required for heating, but since the hard disk device body 7 is always equipped with an air filter,
It is possible to heat by arranging the heaters 9a to 9c near this air filter.

The sub-power source 3 has power source lines L1 and L2.
From a commercial AC power source input via a + 5V DC power source for the relay controller 10 and the heaters 9a, 9
The DC power supply for energizing b and 9c is generated and supplied to each part.

The sub power source 3 and the heaters 9a, 9b, 9
Relay switches RL1, RL2, and RL3 are provided on the DC power supply lines L3, L4, and L5, which connect to c. Each of the above relay switches RL1, RL
On and off of 2 and RL3 are controlled by the relay controller 10 respectively. Temperature measurement data from the temperature sensor 8 is input to the relay controller 10.

Thus, the relay controller 10
Is configured to execute the control shown in FIG. 2 when + 5V DC power is supplied from the sub power supply 3.
That is, first, as ST (step) 1, the hard disk device body 7 being measured by the temperature sensor 8
Read the ambient temperature of T ° C. Next, it is determined whether or not the measured temperature T ° C read in as ST2 is lower than -10 ° C. When the measured temperature T ° C is lower than -10 ° C, all the relay switches RL1 to RL3 are turned on.

When the measurement temperature T ° C. is -10 ° C. or higher,
In ST3, it is determined whether the measured temperature T ° C is lower than -5 ° C. When the measured temperature T ° C is lower than -5 ° C, the relay switches RL1 and RL2 are turned on and the relay switch RL3 is turned off.

When the measured temperature T ° C. is -5 ° C. or higher, S
As T4, it is determined whether the measured temperature T ° C is lower than 0 ° C. When the measured temperature T ° C is lower than 0 ° C, the relay switch RL1 is turned on and the relay switch RL2 is turned on.
And turn off RL3. When the measured temperature T ° C. is 0 ° C. or higher, all the relay switches RL1 to RL3 are turned off. The above control is repeatedly executed periodically until the supply of + 5V DC power from the sub power supply 3 is stopped.

In this embodiment having such a configuration, the first switch 4 is in the open state and the second switch 5 is in the closed state when the power switch of the electronic device is off. As a result, the sub power supply 3 operates (the main power supply 2 is off), and the relay controller 10 is +
5V DC power is supplied to the relay controller 10
In, the control shown in FIG. 2 is executed.

That is, the ambient temperature T ° C. of the hard disk drive main body 7 measured by the temperature sensor 8 is −10 ° C.
If it is lower, all the relay switches RL1 to RL3 are turned on. As a result, the heaters 9a to 9c are energized by the power supply from the sub power supply 3 to heat the hard disk device main body 7 and prevent the hard disk device body 7 from being cooled by the outside air or the like.

Although the ambient temperature T ° C. of the hard disk drive main body 7 measured by the temperature sensor 8 is -10 ° C. or higher,
If the temperature is lower than 5 ° C, relay switches RL1, RL2
Is turned on. As a result, the heaters 9a and 9b are energized by the power supply from the sub power supply 3 to heat the hard disk device body 7 and prevent the hard disk device body 7 from being cooled by the outside air or the like.

The ambient temperature T.sub.C of the hard disk drive main unit 7 measured by the temperature sensor 8 is -5.degree.
If it is lower, only the relay switch RL1 is turned on. This prevents only the heater 9a from being energized by the power supply from the sub power supply 3 to heat the hard disk device body 7 and prevent it from being cooled by the outside air or the like.

When the ambient temperature T ° C. of the hard disk drive main body 7 measured by the temperature sensor 8 is 0 ° C. or higher, the relay switches RL1 to RL3 are turned off and the hard disk drive main body 7 is heated by the heaters 9a to 9c. Is not done.

As described above, when the ambient temperature of the hard disk drive body 7 becomes lower than 0 ° C. when the main power supply 3 is off, among the three heaters 9a, 9b, 9c arranged around the hard disk drive body 7. Since at least one of them is energized and the hard disk device body 7 is heated,
There is a possibility that the write / read head may freeze on the disk surface due to the hard disk drive body 7 being too cold for a long time, or the disk may expand or contract to cause a read / write error called thermal off track. Absent.

Therefore, when the power switch of the electronic device is turned on thereafter, the first switch 4 is closed and the main power supply 2 is closed.
Is activated, and + 5V and +1 are applied to the hard disk drive body 7.
2V DC power is supplied, but at this time, the hard disk device main body 7 can be free from troubles due to overcooling, and can be immediately accessed without preheating.

Further, in this embodiment, three heaters 9a to 9c are provided around the main body 7 of the hard disk device, and when the temperature around the main body 7 of the hard disk device is low when the main power is off, the heaters are heated strongly. The energization of the heaters 9a to 9c is controlled so that the heaters 9a to 9c are heated weakly when the target temperature is high. Therefore, the ambient temperature of the hard disk drive body 7 is
The temperature is always kept stable, and there is no risk of thermal off-track read / write errors due to overheating.

The number of heaters is not limited to three, and may be one, two, or four or more. Further, in the above-described embodiment, the first switch 4 and the second switch 5 are always linked in reverse operation, but there are times when heating by the heater is completely unnecessary even when the main power is off, such as in summer. Therefore, it is preferable that the second switch 5 is always open at such a time. In addition to this, it goes without saying that various modifications such as changing the set temperature can be made without departing from the scope of the present invention.

[0027]

As described above in detail, according to the present invention, even if the main power supply is kept off, the heater automatically heats when the temperature of the main body of the hard disk device drops. , It will not be cooled too much for a long time due to outside air, etc.
It is possible to provide a hard disk device that can be operated without the need for preheating.

[Brief description of drawings]

FIG. 1 is a block diagram showing a main configuration of an embodiment of the present invention.

FIG. 2 is a flowchart showing control of a relay controller in the embodiment.

[Explanation of symbols]

2 ... Main power supply, 3 ... Sub power supply, 4, 5 ... First and second switches, 7 ... Hard disk device body, 8 ... Temperature sensor, 9a-9c ... Heater, 10 ... Relay controller.

Claims (1)

[Claims] 1. A hard disk drive main body driven by the supply of a main power supply, a temperature sensor for measuring an ambient temperature of the hard disk drive main body, a heater arranged around the hard disk drive main body, and a main power supply for the main power supply. When the main power supply is turned off and the sub power supply that operates when it is turned off, the temperature measurement value read by the temperature sensor is read, and when the measured temperature is below the set temperature, the sub power supply supplies power to the heater to heat the hard disk drive body. A hard disk drive, comprising: