1. Field of the Invention
The present invention relates to a pressure sensing device and a pressure sensing method and thermal dissipation device thereof, and more particularly, to a pressure sensing device capable of instantly sending an abnormal warning, and a pressure sensing method and thermal dissipation device thereof.
2. Description of the Prior Art
With the development of information technology, people are closely connected with computer systems. People frequently use computer systems whether they are at home or at work. As computer technology has evolved, a standard computer system, such as a laptop, a desktop or a server, not only has a faster operational clock in the central processing unit (CPU), but also has more powerful and versatile components. Therefore, an increasing amount of heat is generated during the operation of the modern computer system. If the heat is not able to dissipate, damage to the internal components may occur due to overheating. Thus, thermal dissipation efficiency of a computer system has a significant impact on the system's overall performance.
An ideal computer system has a perfectly-designed thermal dissipation device. However, buildup of dust or an inappropriate environment may cause the thermal dissipation device to malfunction, resulting in overheating. For example, different vents are set on the computer case for providing an airflow access. If the computer has been in use for a long duration, not only does dust buildup on the vent reduce the flux of the airflow, but also dust and particles accumulate on the internal components and the thermal dissipation device. In this situation, even if an anti-dust device is designed, it only can passively slow down the rate of the dust accumulation. Thus, in order to stabilize the operation of the computer system, the dust must first be cleared to dissipate the heat when a certain accumulation level is reached. In addition, when the computer is operated in an inappropriate environment, for example, the vent gets stuck because the laptop is put on the carpet, or the laptop is too close to a wall, the operation of the thermal dissipation device is affected, and thermal dissipation efficiency is reduced.
A user may operate the computer system in all kinds of environments. For example, when the user is operating the computer system at high altitude, the airflow generated from the thermal dissipation device's fan is relatively small because the density of the air is low. As a result, the reduction of the thermal dissipation efficiency affects the normal operation of the computer system. The current computer system design cannot be adjusted accordingly with the change of the operation environment, and so the system is not able to achieve the best performance.
It is therefore an objective of the present invention to provide a pressure sensing device for an electronic device and a pressure sensing method and thermal dissipation device thereof.
An embodiment of the invention discloses a pressure sensing device for an electronic device. The pressure sensing device comprises a pressure sensing unit, a control unit, and an alarm unit. The pressure sensing unit is installed in the electronic device, and used for detecting fluid pressure to generate a pressure signal. The control unit is coupled to the pressure sensing unit, and used for determining variation in the fluid pressure in the electronic device according to the pressure signal and generating a control signal. The alarm unit is coupled to the control unit, and used for outputting an alarm signal according to the control signal to execute an alarm function.
An embodiment of the invention further discloses a pressure sensing method for an electronic device. The pressure sensing method comprises the steps of detecting fluid pressure to generate a pressure signal, determining variation in the fluid pressure in the electronic device according to the pressure signal and generating a control signal and outputting an alarm signal according to the control signal to execute an alarm function.
An embodiment of the invention further discloses a thermal dissipation device for an electronic device. The thermal dissipation device comprises a thermal dissipation module, a pressure sensing unit, and a control unit. The thermal dissipation module is installed in the electronic device and used for generating airflow via a fan to dissipate heat. The pressure sensing unit is used for detecting atmospheric pressure surrounding the electronic device to generate a pressure signal. The control unit is coupled to the pressure sensing unit and the thermal dissipation module, and used for determining variation in atmospheric pressure in the electronic device according to the pressure signal and generating a revolution control signal to control a rotational speed of the fan.
These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings.
Please refer to
For an illustration of the operations of the pressure sensing device 10, please refer to
Step 200: Start.
Step 202: Detect fluid pressure to generate a pressure signal SP.
Step 204: Determine variation in the fluid pressure in the electronic device according to the pressure signal SP and generate a control signal SC.
Step 206: Output an alarm signal SAlarm according to the control signal SC to execute an alarm function.
Step 208: End.
According to the pressure sensing process 20, the pressure sensing device 10 detects the fluid pressure in the electronic device, such as pressure due to airflow, to determine an airflow condition inside the electronic device and further generates the alarm signal SAlarm to inform the user of a dust buildup level or the operational environment. In other words, when the dust buildup of the electronic device or the current operation environment is severe enough that the thermal dissipation procedure does not function well, the pressure sensing device 10 can immediately detect the abnormal condition and inform the user to take corresponding actions.
The embodiment of the invention takes corresponding actions by detecting the fluid pressure inside the electronic device and determining the airflow condition, and as a result will modify the normal operation of the electronic device. Please note that the electronic device is not restricted to a certain type. Any device that generates heat during operation is included within the scope of the invention. For example, please refer to
As shown in
For example, the pressure sensing unit 102 can be installed between the air exhaust 306B of the fan 306 and the heat sink 304 (e.g. position P1 as shown in
As a result, the mobility of the air inside the laptop 31 is reduced. Similarly, the pressure signal SP detected by the pressure sensing unit 102 gets relatively small. Thus, taking an example of the position P1 shown in
Therefore, the embodiment of the invention combine the pressure sensing device 10 and the pressure sensing method to detect the dust buildup and abnormal conditions in real-time for informing the user. Consequently, the thermal dissipation efficiency of the laptop 31 is boosted, and further, the operation stability and lifetime of the laptop 31 is enhanced.
Please note that, in the laptop 31, the internal component 308 could be a CPU, a chip or other electronic device, and is not restricted herein. Furthermore, any device capable of detecting the fluid pressure can be used for implementing the pressure sensing unit 102. The pressure sensing unit 102 can be installed anywhere inside the laptop 31 for detection of the fluid pressure. There is no limitation to the number and appearance of the vents 402, as long as air can pass through. The alarm unit 106 could be an amplifier, a light emitting diode (LED) or a vibration unit, for informing the user through sound, light or vibration when the control signal indicates the pressure signal SP is less than the first threshold value TH1.
The user may operate the electronic device in all types of operational environments. The embodiment of the invention can adjust to a proper thermal dissipation function according to the different operational environments. Please refer to
Therefore, the invention can detect the atmospheric pressure of the operation environment through the pressure sensing unit and make an appropriate adjustment by immediately performing the thermal dissipation procedure, thereby allowing the electronic device to achieve the best performance.
For an illustration of the operations of the pressure sensing device 50, please refer to
Step 600: Start.
Step 602: Detect atmospheric pressure surrounding the electronic device to generate a pressure signal SP.
Step 604: Determine variation in the atmospheric pressure in the electronic device and generate a revolution control signal SSPEED to control a rational speed of a fan 512.
Step 606: End.
The pressure sensing procedure 60 is used for describing the operations of the pressure sensing device. The detailed description and related derivatives can be found in the aforementioned description, and is therefore not elaborated on herein.
The invention estimates the air density by detecting the atmospheric pressure surrounding the electronic device and takes further actions to ensure the electronic device achieves the best efficiency. Please note that the electronic device is not limited to a certain type. Any electronic device or equipment that generates heat during operation is included within the scope of the invention. Taking the example of a laptop, the invention sends the pressure signal SP to the control unit 504 to determine a state of the operation environment after detecting the atmospheric pressure surrounding the laptop through the pressure sensing unit 502. In this situation, the control unit 504 could be an embedded controller (EC) of the laptop or a keyboard controller (KBC). Thus, when the control unit 504 receives the pressure signal SP, the pressure signal SP is contrasted with a predetermined value in a lookup table. For example, when the pressure signal SP is less than one atmosphere (1 atm), the control unit 504 will trigger a processing unit (e.g. CPU) to accelerate the rotational speed of the fan 512, and vice versa. Consequently, the laptop instantly adjusts to the best thermal dissipation efficiency according to the operational environment for stabilizing the laptop operation. By contrast, in the prior art, when the user is operating the computer system at a high altitude, the airflow generated by the fan of the thermal dissipation device is relatively small because the density of the air is low. This degrades the thermal dissipation efficiency and causes the computer system to malfunction.
To sum up, the invention combined with the pressure sensing method can instantly detect dust buildup and abnormal conditions to inform the user. Not only is the thermal dissipation efficiency boosted, but also the operation stability of the electronic device and lifetime of the internal components is enhanced. Moreover, the invention can detect atmospheric pressure through the pressure sensing unit and make a proper adjustment to perform an appropriate thermal dissipation procedure, thereby allowing the electronic device to achieve its best performance.
Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.
Number | Date | Country | Kind |
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098117268 | May 2009 | TW | national |