CN1831694B - Temp-control heating device for hydraulic bearing hard disk and its hard disk and control method - Google Patents

Abstract

A temperature - control heating device of hard disc for liquid bearing can maintain oil diaphragm in liquid bearing to be at liquid state still although hard disc of liquid bearing is under very bad environmental temperature condition for ensuring normal information process operation and for avoiding oil diaphragm liquid - solid state conversion caused by temperature factor.

Description

Temperature-controlled heating device applied to liquid dynamic bearing hard disk, hard disk and control method thereof

【Technical field】

The invention relates to a temperature-controlled heating device and a control method, which are applied to a liquid dynamic bearing hard disk of an information processing device, in particular to a temperature-controlled heating device and a control method of a liquid dynamic bearing hard disk.

【Background technique】

Hard disk (Hard Disk) plays the role of storing data in information processing devices. Many important data are stored in the hard disk. With the increase in the processing speed of information processing devices, the access speed of hard disks is also getting faster and faster. , and in the factors that affect the speed of the hard disk, in addition to the running motor, the other is the bearing. The traditional hard disk bearing uses a ball bearing (Ball Bearing), which is to put several ball bearings on the hard disk shaft and base. Steel balls made of metal, the steel balls are in contact with the center of the bearing, and these steel balls are used to support the weight of the running motor, so there will be problems of friction and heat when it rotates. Under the friction and collision of the core, wear will occur, resulting in the inability to provide better shock resistance, and shortening the life of the hard disk. Therefore, a fluid dynamic bearing (FluidDynamic Bearing, FDB) is used on the hard disk to replace the traditional ball bearing. .

The fluid dynamic bearing is a bearing that uses a liquid viscous oil film. The oil film replaces the bearing covered by the traditional metal steel ball. In this way, there will be no direct metal contact and friction problems when the motor is running. At the same time, because the oil film can effectively absorb Vibration can improve the anti-seismic ability of the hard disk, and relatively improve the service life and reliability of the hard disk.

However, due to the characteristics of the oil film, it is in a liquid state at room temperature. If the working environment temperature is lower than zero Celsius or even lower, the oil film will change in physical form. When the temperature is as low as its physical state transition temperature, this When the oil film is in a solid form, this will cause the fluid dynamic bearing to fail to exert its characteristics, and even make the information processing device unable to work. Therefore, under harsh environmental conditions (such as outer space or perennial frigid regions), how to ensure information processing The device can still work normally, which has become one of the problems for researchers to solve.

【Content of invention】

In view of the unsolvable problems and existing shortcomings of the prior art, the present invention proposes a temperature-controlled heating device for a fluid dynamic bearing hard disk and its hard disk and control method. The temperature-controlled heating device is used to heat the fluid dynamic bearing so that the oil film in the fluid dynamic bearing is maintained at Liquid form, to ensure that the hard disk of the liquid dynamic bearing can work normally, and after the heating temperature rises to a set temperature, stop the heating of the temperature control heating device.

In order to achieve the above purpose, the temperature-controlled heating device disclosed in the present invention is applied to liquid dynamic bearing hard disks. The temperature-controlled heating device includes the following modules: a temperature sensing module, a control module, a power supply module and a heating module. The measurement module senses the temperature of the fluid dynamic bearing hard disk, and judges the current state of the oil film in the fluid dynamic bearing by means of the sensed temperature value. The control module receives the temperature value sensed by the sensing module and generates a corresponding control signal to turn on or off The power supply of the power supply module and the heating module generate heat energy from the power supply provided by the power supply module to heat the fluid dynamic bearing hard disk, so as to achieve the purpose of maintaining the normal operation of the fluid dynamic bearing hard disk.

In order to achieve the above purpose, the temperature-controlled heating device disclosed in the present invention is applied to liquid dynamic bearing hard disks. The temperature-controlled heating device includes the following modules: temperature sensing module, temperature control module, logic operation module, power supply module and heating module , and in order to avoid the failure of the temperature control module, the present invention uses the logic operation module to perform a logic operation on the potential signal generated by the sensing module and the control signal generated by the temperature control module, and then output the control signal, wherein when the sensed temperature value is higher than When the heating stop temperature is set, the sensing module will output a low potential signal, so that the logic operation module can output a control signal representing turning off the power supply, so as to achieve better temperature control and heating.

In order to achieve the above object, according to the principle of the present invention, the present invention discloses a liquid dynamic bearing hard disk, which includes a hard disk with a temperature control heating device and includes the following modules: a liquid dynamic bearing hard disk, a temperature sensing module, a control module, a power supply module and a heating module , using the temperature sensing module to sense the temperature of the liquid dynamic bearing hard disk, judging the current state of the oil film in the liquid dynamic bearing by means of the sensed temperature value, the control module receives the temperature value sensed by the sensing module, and generates a corresponding control signal, The power supply of the power module is turned on or off, and the heating module generates heat energy from the power provided by the power module to heat the FDB hard disk, so as to maintain the normal operation of the FDB hard disk.

In order to achieve the above object, according to the principle of the present invention, the present invention discloses a liquid dynamic bearing hard disk, which includes a hard disk with a temperature control heating device and includes the following modules: liquid dynamic bearing hard disk, temperature sensing module, temperature control module, logical operation module, power supply module and heating module, and in order to avoid the failure of the temperature control module, the present invention uses the logic operation module to perform a logic operation on the potential signal generated by the sensing module and the control signal generated by the temperature control module, and then output the control signal. When the measured temperature value is higher than the set heating stop temperature value, the sensing module will output a low potential signal, so that the logic operation module outputs a control signal representing power off, so as to achieve the purpose of better temperature control and heating.

In order to achieve the above object, the control method of the temperature control heating device applied to the fluid dynamic bearing hard disk disclosed by the present invention includes: firstly, setting the starting heating temperature and the stopping heating temperature to start or stop the heating of the heater; detecting The current temperature of the liquid dynamic bearing; according to the detected temperature value, it is judged whether the set heating stop temperature is reached; if the detected temperature is greater than or equal to the set heating stop temperature, the power of the heater is turned off to stop heating the liquid dynamic bearing ; If the detected temperature is less than or equal to the set initial heating temperature, turn on the power of the heater to heat the fluid dynamic bearing.

According to the purpose and principle of the present invention, it can be understood that the advantage of the present invention is that the oil film in the fluid dynamic bearing can still be kept under severe temperature environment conditions by means of this temperature-controlled heating device applied to the fluid dynamic bearing hard disk. Maintain the liquid form, avoid the physical form change of the oil film due to temperature factors, so that the liquid dynamic bearing hard disk can work normally.

【Description of drawings】

Fig. 1 is a system block diagram disclosed by the present invention;

FIG. 2 is a system block diagram of an embodiment disclosed by the present invention;

FIG. 3 is a circuit diagram disclosed by the present invention; and

FIG. 4 is a flowchart of the operation steps disclosed in the present invention.

【Detailed ways】

Please refer to FIG. 1, which is a system block flow chart of the present invention. After the information processing device is turned on, the temperature sensing module 10 in the temperature control heating device 100 will sense the temperature value of the liquid dynamic bearing hard disk 150, and sense the initial temperature value (that is, the temperature value of the fluid dynamic bearing hard disk 150 sensed for the first time), a corresponding potential signal will be generated, and several feedback temperature values will be continuously sensed, and a corresponding potential signal will be generated to the control module 20 .

Among them, the temperature sensing module 10 can convert the temperature characteristics according to the physical form of the oil film in the fluid dynamic bearing, and generate different potential signals. When the sensing temperature is higher than the physical form conversion temperature, the oil film will appear in a liquid form, and generate corresponding potential signals; When the sensing temperature is lower than the physical form transition temperature, the oil film takes on a solid form and generates a corresponding potential signal.

The control module 20 is connected with the temperature sensing module 10, and receives the potential signal (for example, high potential) generated by the temperature sensing module 10 to generate a power-on control signal to the power module 30, and the power module 30 turns on the power supply according to the power-on control signal , to start the heating module 40 and start to generate heat energy, wherein the heating module 40 can be arranged next to the fluid dynamic bearing hard disk 150 to provide uniform heat energy so that the oil film in the fluid dynamic bearing maintains a liquid state. At this time, the temperature sensing module 10 continues Sensing the temperature of the liquid dynamic bearing hard disk 150, when the sensing temperature is higher than the physical form conversion of the oil film, a potential signal (for example, low potential) is generated to the control module 20, and the control module 20 generates a power supply when receiving the potential signal The power-off control signal is sent to the power module 30, and the power module 30 turns off the power according to the power-off control signal, so as to stop the heating module 40 from generating heat energy, so as to achieve the purpose of temperature-controlled heating.

Here, a practical example is given for illustration. An information processing device equipped with a liquid dynamic bearing hard disk temperature control heating device works in an environment of minus 25 degrees Celsius. The initial heating temperature sensed by the temperature sensing circuit is The temperature is minus 20 degrees Celsius (determined by the design of the sensing component), and the heating stop temperature is 10 degrees Celsius. When the power of the information processing device is turned on, the temperature sensing components (for example, thermistor, thermal induction type Transistor switch 2N3904 and heat-sensing integrated circuit ADM7301, etc.) for temperature sensing, in which the use of temperature sensing components will produce resistance value changes with temperature, so as to make the sensing circuit output signals of different potentials, because the ambient temperature is minus 25 degrees Celsius If the temperature is lower than the sensing initial heating temperature, it means that the oil film in the fluid dynamic bearing has solidified at this time, so the sensing circuit generates a high potential signal (for example, DC 5 volts), and the power controller receives the sensing After the high potential signal of the circuit, turn on the power supply of the heater (for example, electric heating wire, ceramic heating plate, etc.) to start heating the liquid dynamic bearing. At this time, the sensing circuit still continues to sense the temperature of the liquid dynamic bearing hard disk. Or when it is equal to the heating stop temperature, the sensing circuit generates a low-potential signal (for example, DC 0 volts), and the power controller turns off the power supply of the heater after receiving the low-potential signal of the sensing circuit, so as to stop heating the liquid dynamic bearing. In addition, in order to maintain a fixed heating curve under different temperature environments, it can also be achieved through a Pulse Width Modulation (PWM) control loop, so as to achieve the purpose of temperature-controlled heating.

Next please refer to FIG. 2 , which is a system block flow chart of an embodiment of the present invention. When the power of the information processing device is turned on, a temperature control module 50 is used to set the starting heating temperature value and the stopping heating temperature value, and then temperature sensing The module 10 senses the temperature of the fluid dynamic bearing hard disk 150, and returns a potential signal corresponding to the temperature value to the temperature control module 50 and the logic operation module 60 (for example, AND gate AND Gate logic switch), wherein the temperature control module 50 includes a basic Input and output system (Basic Input Output System, BIOS).

When the returned temperature value is lower than (less than) the set initial heating temperature value, the temperature control module 50 generates a power-on control signal to the power module 30, and the power module 30 is turned on to provide power to the heating module 40, and the heating module 40 Start to generate heat energy. At this time, the temperature sensing module 10 continues to sense the temperature value, and returns the potential signal corresponding to the temperature value to the temperature control module 50. When the returned temperature value is greater than or equal to the set heating stop temperature value , the temperature control module 50 generates a power off control signal to the power module 30 to turn off the power module 30 to cut off the power of the heating module 40, and the heating module 40 stops generating heat energy.

When the information processing device fails (for example, the system crashes, etc.), and the temperature control module 50 continues to output the power-on control signal (for example, a high potential signal), the present embodiment uses the logic operation module 60 (for example, the AND gate AND Gate logic switch), the potential signal of the temperature sensing module 10 is calculated with the control signal of the temperature control module 50, and when the sensed temperature value is greater than or equal to the stop heating temperature value, the temperature sensing module 10 outputs a low potential The signal is sent to the logic operation module 60, so that the logic operation module 60 outputs a low potential signal according to the operation result, that is, the power off control signal, so that the power supply module 30 turns off the power, and when the system is prevented from crashing, the heating module 40 continues to heat, causing Damage to fluid dynamic bearing hard drives.

Generally speaking, when the liquid dynamic bearing hard disk starts to work, the heat generated will cause the temperature of the hard disk to rise to 40 degrees Celsius to 50 degrees Celsius (depending on the external environment temperature). Therefore, the main purpose of the temperature control heating device is to make the liquid state The oil film in the bearing is maintained in the form of liquid to ensure the normal operation of the information processing device, and when the sensing temperature reaches a set temperature, the heating device is stopped to prevent the hard disk from being in a high-temperature working environment, which will reduce the life of the hard disk or cause The hard disk is corrupted.

In addition, please refer to FIG. 3 , which is a circuit diagram of the present invention, including that one end of the second resistor R2 is connected to a positive 5 volt voltage source, the other end is connected to the first node 1, and one end of the thermistor R6 is connected to the first node 1 , the other end of which is grounded, and the first input end of the comparator U2 is connected to the first node 1, one end of the third resistor R3 is connected to a positive 5 volt voltage source, and the other end is connected to the second node 2, and the seventh resistor R7 One end of U2 is grounded, the other end is connected to the second node 2, and the second input end of the comparator U2 is connected to the second node 2, its 12th pin is grounded, the 3rd pin is connected to a positive 5 volt voltage source and the fourth capacitor C4 .

Next, the output end of the comparator U2 is connected to the first input end of the AND gate switch U3, one end of the first resistor R1 is connected to a positive 5 volt voltage source, and the other end thereof is connected to the first input end of the AND gate switch U3, and the AND gate The second input terminal of the switch U3 receives the heating control signal HDD_HEAT_CTL, the third pin is grounded, the fifth pin is connected to a positive 5 volt voltage source and the fifth capacitor C5, and its output terminal is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is grounded , the collector of the transistor Q1 is connected to the third node 3, one end of the fourth resistor R4 is connected to a positive 5V voltage source, and the other end is connected to the base of the transistor Q1.

The gate of the metal oxide semiconductor field effect transistor U1 is connected to the third node 3, its source is connected to the main voltage source DVMAIN and the first capacitor C1, the second capacitor C2 and the third capacitor C3 in parallel, and its drain is connected to The heating power source HDD_HEAT_V, the fifth resistor R5 is connected between the third node 3 and its source, and the sixth capacitor C6 is coupled in parallel with the diode D1 to the drain of the MOSFET U1.

The circuit action description is as follows:

When the voltage on the thermistor R6 is lower than the set protection voltage potential, the comparator U2 outputs a low potential signal, which makes the AND gate switch U3 output a low potential signal to the base of the transistor Q1 after operation, so the transistor Q1 is not conducting (OFF), and the gate of MOSFET U1 cannot be triggered, so MOSFET U1 is not conducting (OFF), and the main voltage source DVMAIN cannot pass through the MOSFET The effect tube U1 is connected to the heating power supply HDD_HEAT_V. At this time, the heater stops heating. In addition, when the voltage on the thermistor R6 is not lower than the protection voltage potential, the protection circuit does not operate, so the heater can still be controlled by the heating control signal HDD_HEAT_CTL. That is, when the heating control signal HDD_HEAT_CTL is a high potential signal, the heater heats up, and when the heating control signal HDD_HEAT_CTL is a low potential signal, the heater stops heating.

Please refer to FIG. 4 , which is an operation flowchart of the present invention. First, set the initial heating temperature value and the stop heating temperature value (step 200); detect the current temperature value of the fluid dynamic bearing (step 201); according to the detection of the fluid dynamic bearing When the temperature value of the fluid dynamic bearing is detected to be lower than or equal to the initial heating temperature value, start the heating device (step 203) to stop the heating temperature (step 202); Heating; when the detected temperature of the fluid dynamic bearing is higher than or equal to the set heating stop temperature value, the heating device is turned off (step 204) to stop heating the fluid dynamic bearing.

By means of the temperature control heating device applied to the fluid dynamic bearing hard disk and its hard disk and temperature control method, the temperature of the fluid dynamic bearing hard disk is sensed to control the heating of the heater, so that the oil film in the fluid dynamic bearing is maintained in a liquid state, ensuring the liquid state The bearing hard disk works normally, and solves the problems caused by the liquid dynamic bearing hard disk working at low temperature.

Claims (25)

1. A temperature-controlled heating device applied to a fluid dynamic bearing hard disk, characterized in that the device comprises: A temperature sensing module, used for sensing an initial temperature value and several feedback temperature values of the fluid dynamic bearing hard disk; A control module, connected to the temperature sensing module, generates a corresponding control signal according to the initial temperature value and the feedback temperature values; A power supply module connected to the control module, to turn on or off the power supply of the power supply module according to the control signal, so as to provide or stop supplying power; and A heating module, connected to the power module, receives the power provided by the power module to generate heat to heat the fluid dynamic bearing hard disk, so that the oil film in the fluid dynamic bearing maintains a liquid state. 2. The temperature-controlled heating device as claimed in claim 1, wherein the temperature sensing module comprises a thermistor. 3. The temperature-controlled heating device as claimed in claim 1, wherein the heating module comprises a heating wire. 4. The temperature-controlled heating device as claimed in claim 1, wherein the heating module comprises a ceramic heating plate. 5. A temperature-controlled heating device applied to a liquid dynamic bearing hard disk, characterized in that the temperature-controlled heating device includes: A temperature sensing module, used to sense the temperature value of the fluid dynamic bearing hard disk, and generate a corresponding potential signal; A temperature control module, used to set an initial heating temperature value and a heating stop temperature value, and determine the temperature value sensed by the temperature sensing module and the set initial heating temperature value and the heating stop temperature value difference to generate a control signal; A logic operation module, connected to the temperature sensing module and the temperature control module, is used to receive the corresponding potential signal and the control signal, perform a logic operation, and output a new control signal; A power module receives the new control signal to turn on or turn off the power of the power module; and A heating module is activated according to the power provided by the power supply module to generate heat energy to the fluid dynamic bearing hard disk, so that the oil film in the fluid dynamic bearing maintains a liquid state. 6. The temperature-controlled heating device as claimed in claim 5, wherein the temperature sensing module comprises a thermistor. 7. The temperature-controlled heating device according to claim 6, characterized in that: the temperature sensing module further comprises a second resistor with one end connected to a positive voltage source and the other end connected to a first node, the thermal One end of a sensitive resistor is connected to the first node, the other end is connected to ground, and the first input end of a comparator is connected to the first node, one end of a third resistor is connected to the positive voltage source, and the other end is connected to A second node, one end of a seventh resistor is grounded, the other end is connected to the second node, and the second input end of the comparator is connected to the second node. 8. The temperature-controlled heating device as claimed in claim 5, wherein the temperature control module comprises a basic input and output system. 9. The temperature-controlled heating device as claimed in claim 5, wherein the logic operation module comprises an AND gate logic switch. 10. The temperature-controlled heating device according to claim 9, wherein the logical operation module further comprises that the first input end of the AND gate switch is connected to the output end of a comparator, and the first input end of the comparator is connected to to a first node, the second input end of the comparator is connected to a second node, the second input end of the AND gate switch receives a heating control signal, and its output end is connected to the base of a transistor, the emitter of the transistor The transistor is grounded, and the collector of the transistor is connected to a third node. 11. The temperature-controlled heating device as claimed in claim 5, wherein the heating module comprises a heating wire. 12. The temperature-controlled heating device as claimed in claim 5, wherein the heating module comprises a ceramic heating plate. 13. A hard disk with temperature control and heating, characterized in that the hard disk includes: A fluid dynamic bearing hard disk, used to provide an information processing device with a storage area required for data writing/reading/storage; A temperature sensing module, used for sensing the initial temperature value and several feedback temperature values of the fluid dynamic bearing hard disk; A control module, connected to the temperature sensing module, generates a corresponding control signal according to the initial temperature value and the feedback temperature values; A power module receives the control signal to turn on or turn off the power of the power module to provide or stop supplying power; and A heating module is connected with the power module, receives the power provided by the power module, and activates the heating module to generate heat to heat the fluid dynamic bearing hard disk, so that the oil film in the fluid dynamic bearing maintains a liquid state. 14. The hard disk according to claim 13, wherein the temperature sensing module comprises a thermistor. 15. The hard disk according to claim 13, wherein the heating module comprises a heating wire. 16. The hard disk as claimed in claim 13, wherein the heating module comprises a ceramic heating plate. 17. A hard disk with temperature control and heating, characterized in that the hard disk includes: A fluid dynamic bearing hard disk, used to provide an information processing device with a storage area required for data writing/reading/storage; A temperature sensing module, used for sensing the initial temperature value and several feedback temperature values of the fluid dynamic bearing hard disk; A temperature control module, used to set an initial heating temperature value and a heating stop temperature value, and determine the temperature value sensed by the temperature sensing module and the set initial heating temperature value and the heating stop temperature value difference to generate a control signal; A logic operation module, connected to the temperature sensing module and the temperature control module, is used to receive the corresponding potential signal and the control signal, perform a logic operation, and output a new control signal; A power supply module receives the new control signal to turn on or turn off the power supply of the power supply module to provide or stop supplying power; and A heating module is connected with the power module, receives the power provided by the power module, and activates the heating module to generate heat to heat the fluid dynamic bearing hard disk, so that the oil film in the fluid dynamic bearing maintains a liquid state. 18. The hard disk according to claim 17, wherein the temperature sensing module comprises a thermistor. 19. The hard disk according to claim 18, wherein the temperature sensing module further comprises a second resistor with one end connected to a positive voltage source and the other end connected to a first node, the thermistor One end is connected to the first node, the other end of the thermistor is grounded, the first input end of a comparator is connected to the first node, one end of a third resistor is connected to the positive voltage source, and the other end is connected to To a second node, one end of a seventh resistor is grounded, the other end is connected to the second node, and the second input end of the comparator is connected to the second node. 20. The hard disk as claimed in claim 17, wherein the temperature control module comprises a BIOS. 21. The hard disk according to claim 17, wherein the logic operation module comprises an AND gate logic switch. 22. The hard disk according to claim 21, wherein the logical operation module further comprises that the first input terminal of the AND switch is connected to the output terminal of a comparator, and the first input terminal of the comparator is connected to a first A node, the second input end of the comparator is connected to a second node, the second input end of the AND gate switch receives a heating control signal, the output end is connected to the base of a transistor, and the emitter of the transistor is grounded, The collector of the transistor is connected to a third node. 23. The hard disk as claimed in claim 17, wherein the heating module comprises a heating wire. 24. The hard disk as claimed in claim 17, wherein the heating module comprises a ceramic heating plate. 25. A control method for a temperature-controlled heating device applied to a liquid dynamic bearing hard disk, characterized in that the control method includes: Set a starting heating temperature and a stopping heating temperature; detecting the temperature of the fluid dynamic bearing hard disk; When the temperature is lower than or equal to the initial heating temperature, turn on the power supply of the temperature-controlled heating device for heating, so that the oil film in the fluid dynamic bearing maintains a liquid state; and When the temperature is greater than or equal to the stop heating temperature, turn off the power supply of the temperature-controlled heating device to stop heating.

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