TWI491805B - Heat-dissipating device - Google Patents

Description

Heat sink

The present invention relates to a heat sink, and more particularly to a heat sink for an electrical device.

The modern technology industry is developed, and various manufacturers continue to improve and improve the performance of the original products in order to meet the needs of consumers, and even launch multi-functional products.

However, under the fierce competition in the market, the functionality that products can have is similar. If it is only to enhance the function and practicability of the products, it is difficult to have competitiveness in today's market. Therefore, various manufacturers have also started to improve products. The aesthetics of the design make the home products not only have the functionality of the era, but also have an avant-garde design style.

Therefore, under the above concept, the conventional fan design is also started to be combined with the light-emitting elements, for example, a light emitting diode (LED) is disposed on the fan, and a simple control circuit is used to create a dazzling lighting effect. Allows the appearance of the fan to escape from the traditional design of the past.

Today's cooling fan structures have many types of lighting devices, such as by arranging light-emitting elements on a fan and controlling each of the light-emitting elements by using a timing control circuit. The illuminating time, when the blade rotates, the illuminating illuminating elements can be pieced together to form a predetermined pattern or character by the principle of human vision persistence.

The above-mentioned heat-dissipating fan having a light-emitting element can only provide a light-dark change of light to attract the user's eyes, but does not provide other operational information of the user's light-emitting fan, such as the current working temperature or running speed of the fan during operation, and the like. Therefore, the practicality of the current lighting fan still needs to be further improved.

In view of the above problems, the present invention provides a heat dissipating device, which can solve the problem that the conventional heat dissipating fan can only provide a simple heat dissipating effect, and the cooling fan with the light emitting element can only provide the user with light and dark changes or text or pattern changes, but cannot Provides useful information such as user fan speed changes or temperature changes.

The heat dissipating device disclosed in the present invention comprises a frame, a fan, a light emitting element and a plurality of light guiding elements. A first position and a second position are defined on the frame, and the fan is disposed on the frame and rotatable relative to the frame. The illuminating element is disposed at a first position of the frame and illuminates a light toward the fan. The light guiding element is disposed on the fan and rotates relative to the frame along a circumferential direction of the fan. Each light guiding element absorbs light at a first position of the frame and completely releases light at a second position of the frame.

The invention has the effect that the light guiding element can be disposed on the blade of the fan in a coating or doping manner, and the light guiding element disposed on the frame illuminates the light guiding element at a fixed point to absorb the light and carry the light through the light guiding element. Displacement along the circumferential direction of the fan allows the user to have a visual persistence when viewing the fan, so that the light appears on the fan along the circumference of the fan. The extended or shortened light band allows the user to intuitively determine the rotational speed of the fan based on the length of the light strip. Therefore, in addition to the glare effect of the conventional illuminating fan, the heat dissipating device of the present invention has a function of prompting the user to rotate the fan, and has considerable practicality.

The features, implementations, and utilities of the present invention are described in detail below with reference to the drawings.

10‧‧‧heating device

110‧‧‧Frame

120‧‧‧Lighting elements

130‧‧‧Light guiding elements

140‧‧‧Control unit

150‧‧‧temperature sensor

160‧‧‧fan

161‧‧‧ leaves

162‧‧ wheels

170‧‧‧ boards

Fig. 1 is a perspective view showing a heat sink according to a first embodiment of the present invention.

Fig. 2 is a top plan view showing a heat sink according to a first embodiment of the present invention.

Fig. 3 is a side elevational view showing the heat sink of the first embodiment of the present invention.

Figure 4 is a block diagram showing the circuit of the first embodiment of the present invention.

5A and 5B are schematic views showing the state of use of the heat sink according to the first embodiment of the present invention.

Figure 6 is a side elevational view of a heat sink according to a second embodiment of the present invention.

The heat dissipating device disclosed in the present invention is applied to heat dissipating heat generating components in an electrical device, for example, assembling a heat dissipating device on a computer motherboard to dissipate heat from a central processing unit, or assembling the graphic processing unit on a separate display card (graphics Processing unit, GPU) for cooling.

1 is a perspective view of a heat dissipating device according to a first embodiment of the present invention, and the first embodiment of the present invention shown in FIGS. 2 and 3 is also referred to. A schematic top view and a side view of the heat sink.

The heat dissipating device 10 disclosed in the first embodiment of the present invention has a frame 110, a light emitting element 120, a plurality of light guiding elements 130, a control unit 140, a temperature sensor 150, and a fan 160. For example, the light-emitting element 120 of the embodiment is a light-emitting diode, and the light-guiding element 130 is a fluorescent powder or is composed of a fluorescent powder, such as an organic fluorescent powder, a fluorescent pigment, and an inorganic fluorescent powder. And radioactive elements. The control unit 140 is a central processing unit (CPU) or a micro control unit (MCU), and the temperature sensor 150 is a resistive temperature sensor, but the above component types are for illustration only. It is not intended to limit the invention. For example, the light-emitting element 120 may also be an incandescent light bulb, the light-guiding element 130 may be a phosphor powder or a phosphor powder, and the temperature sensor 150 may be replaced by an infrared temperature sensor or an optical fiber temperature sensor or the like.

Referring to FIG. 1 to FIG. 4 , the heat dissipating device 100 disclosed in the first embodiment of the present invention defines a first position P1 and a second position P2 on the frame 110 , and the light emitting element 120 is disposed at the first position of the frame 110 . P1 is for illuminating a light toward the inside of the frame 110. The fan 160 is disposed in the frame 110. The fan 160 has a plurality of blades 161 and a hub 162. The plurality of blades 161 are coupled to the outer periphery of the hub 162. The hub 162 is axially disposed on the frame 110 and can drive a plurality of blades 161 along a circumference. The direction is rotated within the frame 110, which may be clockwise or counterclockwise, wherein. The light guiding element 130 is coated on the surface of each of the blades 161 of the fan 160, and is displaceable along the circumferential direction of the fan 160 as the fan 160 rotates, and the light generated via the light emitting element 120 is irradiated on the light guiding element 130. The light is carried in the frame 110 to the second position P2 of the frame by the absorption and light release characteristics of the light guiding element 130 itself, and is completely released at the second position P2 of the frame 110. The light is radiated, and the light is caused to generate a light band on the fan 160 that is elongated or shortened in the circumferential direction of the fan 160.

The control unit 140 and the temperature sensor 150 are respectively disposed on the frame 110, and a circuit board 170 is disposed between the frame 110 and the fan 160. The control unit 140 and the temperature sensor 150 are electrically disposed on the circuit board 170, respectively. . The temperature sensor 150 is electrically connected to the control unit 140 and the fan 160, respectively, and detects the operating temperature of the fan 160 or the ambient temperature of the heat sink 10 during operation.

The control unit 140 is electrically connected to the light emitting element 120 and the fan 160, respectively, and controls the time when the light emitting element 120 emits light and the rotation period of the fan 160, wherein the fan 160 normally operates in a first rotation cycle and has a full speed operation. For a second rotation period, for example, the first rotation period of the fan 160 is 1/25 second, then the second rotation period of the fan 160 is less than 1/25 second, for example, 1/50 second, so that the fan 160 is in the normal state every It runs at a speed of 1500 rpm (1500 rpm) and runs at 3000 rpm at full speed. In addition, the time during which the light-emitting element 120 illuminates the blade 161 of the fan 160 at the first position P1 of the frame 110 is irradiated for a predetermined time according to the second rotation period of the fan 160, for example, the second rotation period of the fan 160 as described above. For 1/50 second, the light-emitting element 120 in the heat sink 10 is fixedly irradiated onto the fan blade 161 of the fan 160 for a predetermined time of 1/50 second, regardless of whether the rotational speed of the fan 160 is changed.

Therefore, when the light-emitting element 120 emits light toward the blade 161 of the fan 160 at a suitable pulse frequency at the first position P1 of the frame 110 and is irradiated for a predetermined time, the light guiding element 130 disposed on the blade 161 will be the first in the frame 110. Light is absorbed at the position P1, and the light is carried along the circumferential direction of the fan 160 accompanying the rotation of the fan 160. At the same time, at During the displacement of the light-guiding light guiding element 130 from the first position P1 of the frame 110 to the second position P2, the light guiding element 130 will gradually release the light and completely release the light at the second position P2 of the frame 110. In addition, since the second position P2 of the frame 110 is defined as a position at which the light guiding element 130 completely releases light, in a case where the first position P1 of the frame 110 is fixed, when the light emitting element 120 illuminates the light with a timing and a fixed point, the fan At 160 o'clock, the second position P2 of the frame 110 will be displaced on the frame 110 as the rotation period of the fan 160 changes, so that the distance between the first position P1 and the second position P2 of the frame 110 and the fan 160 The rotation period is inversely proportional, and is shortened as the rotation period of the fan 160 rises, and elongated as the rotation period of the fan 160 decreases.

It is worth noting that since the predetermined time each time the light-emitting element 120 illuminates the blade 161 is fixed and corresponds to the second rotation period of the fan 160, when the fan 160 operates in the second rotation cycle, the first in the frame 110 The light guiding element 130 that absorbs the light at the position P1 will completely release the light after the blade 161 of the fan 160 rotates one turn, and the position at which the light guiding element 130 completely releases the light is defined as the second position P2 of the frame 110, and This second position P2 is close to the first position P1 of the frame 110 or overlaps with the first position P1. At this time, if the user looks at the fan 160, the eye portion will have a visual persistence phenomenon and the light is observed to draw a circular light band along the circumferential direction of the fan 160 (as shown in FIG. 5A). On the contrary, when the fan 160 operates in the first rotation period, since the predetermined time for the light-emitting element 120 to illuminate the light on the blade 161 of the fan 160 is smaller than the first rotation period of the fan 160, the light is absorbed at the first position P1 of the frame 110. The light guiding element 130 will completely release the light after the blade 161 of the fan 160 rotates for half a week, thereby drawing a semi-circular light band on the fan 160, and the second position P2 of the frame 110 is located in the frame. 12 o'clock direction of the first position P1 of 110 (as shown in Figure 5B).

Therefore, in the use of the heat dissipating device 10 of the present invention, the user can intuitively observe the length of the light band drawn by the light guiding member 130 on the fan 160 to determine the rotation speed of the fan 160, for example, in the first aspect of the present invention. In the embodiment, by observing the light guiding element 130 carrying light, a light band of 1/4 circle, 1/2 circle, 3/4 circle or full circle is drawn on the fan 160, and the user can intuitively judge the fan 160. It is running at slow speed, normal, fast or full speed.

In addition, the heat dissipating device 10 disclosed in the first embodiment of the present invention can further detect the operating temperature of the fan 160 or the ambient temperature of the heat dissipating device 10 through the temperature sensor 150; or the temperature sensor 150 is additionally electrically connected. The heating element to the electrical device detects the operating temperature of the heating element and transmits a sensing signal to the control unit 140 according to the measured temperature. Then, the control unit 140 controls the color of the light emitted by the light emitting element 120 according to the sensing signal. For example, if the temperature range measured by the temperature sensor 150 is between 40 and 60 ° C, the control unit 140 controls the light-emitting element 120 to emit green light; and the temperature measured by the temperature sensor 150 ranges below 40 ° C. The control unit 140 controls the light emitting element 120 to emit blue light; and the temperature range measured by the temperature sensor 150 is above 60 ° C. The control unit 140 controls the light emitting element 120 to emit red light or the like.

Moreover, when the temperature sensor 150 senses the change of the temperature, the sensing signal is generated and transmitted to the control unit 140, and the control unit 140 changes the rotation period of the fan 160 according to the sensing signal, that is, when the temperature is When rising, the control unit 140 reduces the rotation period of the fan 160 to speed up the rotation of the fan 160 and improve the heat dissipation efficiency of the fan 160.

Based on the above, the heat dissipating device 10 of the present invention not only allows the user to determine the rotational speed of the fan 160 by observing the length of the light beam formed on the fan 160, but also The operating temperature of the fan 160, the ambient temperature of the heat sink 10, or the operating temperature of the heating element of the electrical device are intuitively known by observing the change in the color of the light. Moreover, the user can further determine whether the operation of the heat sink 10 is normal according to the length of the light strip and the change of the color of the light. For example, when the light guiding element 130 carries light on the fan 160 to form a semi-circular light band, and the color of the light emitted by the light-emitting element 120 is red, the user determines that the rotation speed of the fan 160 is abnormal, and the heat dissipation device is instantaneously performed. 10 maintenance procedures.

Please refer to FIG. 6 , which is a side view of the heat dissipation device 20 according to the second embodiment of the present invention. The second embodiment of the present invention is substantially identical in structure to the first embodiment, except that in the heat sink 20 disclosed in the second embodiment of the present invention, the whole or at least a part of the fan 160 is transparent. The light material is composed of, that is, the plurality of blades 161 of the fan 160 and the hub 162 are composed of a light transmissive material, or only a plurality of blades 161 or a portion of the blades 161 are composed of a light transmissive material. The light guiding element 130 is doped in the form of phosphor powder or phosphor powder in these vanes 161 composed of a light transmissive material. In addition, the light-emitting element 120 is disposed at the bottom of the frame 110 (the side of the frame 110 connected to the fan 160) for emitting light from the bottom of the frame 110 toward the blade 161 of the fan 160, so that the light penetrates the blade 161 of the fan 160 and is irradiated On the light guiding element 130.

Therefore, when the heat sink 20 is electrically connected to an external power source, the fan 160 operates according to a predetermined rotation period of its own, and the light emitting element 120 emits light according to a pulse period of its own predetermined period, and irradiates the blade 161 of the fan 160 with a predetermined schedule. For a time, the light guiding element 130 can carry the light along the circumferential direction of the fan 160 after absorbing the light, thereby causing the light to form a light band on the fan 160 indicating the rotation speed of the fan 160.

The effect of the invention lies in the timing and fixed-point illumination of the light-emitting element The blades of the fan allow the light guiding element to absorb light at a fixed point, and the light carried along with the rotation of the fan is displaced along the circumferential direction of the fan, so that the user is subjected to the persistence of the vision and observes the light on the fan. The light band indicating the fan speed is formed, so that the user can intuitively determine the running speed of the fan according to the elongation or shortening of the length of the light band. In addition, the heat dissipating device of the present invention can selectively match the color change of the light to indicate the working temperature or the ambient temperature during use of the heat dissipating device, so that the user can simultaneously know the information such as the rotational speed and the temperature, and thereby determine whether the operation of the heat dissipating device is abnormal.

Although the embodiments of the present invention are disclosed above, it is not intended to limit the present invention, and those skilled in the art, regardless of the spirit and scope of the present invention, the shapes, structures, and features described in the scope of the present application. And the number of modifications may be made, and the scope of patent protection of the present invention shall be determined by the scope of the patent application attached to the specification.

10‧‧‧heating device

110‧‧‧Frame

120‧‧‧Lighting elements

130‧‧‧Light guiding elements

160‧‧‧fan

161‧‧‧ leaves

162‧‧ wheels

Claims (8)

A heat dissipating device includes: a frame defining a first position and a second position; a fan rotatably disposed on the frame; a light emitting element disposed at the first position of the frame, and Illuminating a light toward the fan; and a plurality of light guiding elements disposed on the fan, the light guiding elements are rotated relative to the frame along a circumferential direction of the fan, and the light guiding elements are disposed in the frame The first position absorbs the light and completely releases the light at the second position of the frame, wherein the fan has a first rotation period and a second rotation period, and the first rotation period is greater than the second rotation period, The second rotation period is a rotation period of the fan running at full speed, wherein the light emitting element illuminates the fan for a predetermined time, the predetermined time being equal to the second rotation period. The heat sink of claim 1, wherein a distance between the first position and the second position of the frame in the circumferential direction of the fan is inversely proportional to the rotation period of the fan. The heat sink of claim 1, wherein the light guiding elements are disposed on the surface of the fan. The heat sink of claim 1, wherein the fan is composed of a light transmissive material, and the light guiding elements are doped in the fan. The heat dissipating device of claim 1, wherein the light guiding elements are fluorescent powder or phosphorescent powder. The heat dissipating device of claim 1, wherein the fan comprises a plurality of vanes, and the light guiding elements are disposed on or doped in the vane surfaces. The heat sink device of claim 1, further comprising a control unit electrically connected And the light emitting element, and controlling the fan to rotate relative to the frame and controlling the light emitting element to illuminate the light. The heat sink device of claim 7, further comprising a temperature sensor electrically connected to the control unit and transmitting a sensing signal to the control unit, the control unit according to the sensing signal Corresponding to controlling the color of the light illuminating the illuminating element.