TWM455777U - Structure of piezoelectric fan for heat dissipation - Google Patents

Description

Structure of piezoelectric fan for heat dissipation

The utility model provides a piezoelectric fan for heat dissipation, in particular to a structure of a piezoelectric fan for heat dissipation which has the advantages of light, thin, short, no magnetic field generation and power saving, and has the advantages of no rotating blade and electromagnetic rotating motor.

According to the first figure and the first A picture, it is a schematic diagram of a conventional cooling fan and a sectional view of a conventional cooling fan. The conventional cooling fan 2 is generally composed of a blade electromagnetic rotating motor and a fan case, such as US Pat. .938.B2 and US 2008/0130226A1, however, the conventional cooling fan 2 generally has a rectangular parallelepiped shape, and today's portable electronic devices such as a notebook computer, I PAD, etc. are becoming lighter and thinner.

However, the conventional rectangular heat sink fan 2 faces serious challenges in thickness design. Therefore, how to effectively reduce the thickness of the heat radiating fan 2 is a problem faced by various manufacturers.

Therefore, how to solve the above problems and problems in the past, that is, the creators of the new type and the relevant manufacturers engaged in this industry are eager to study the direction of improvement.

Therefore, in view of the above-mentioned deficiencies, the creators of this new type have collected relevant information, and through multi-party assessment and consideration, and through years of experience accumulated in the industry, through continuous trial and modification, the design of such non-rotating blades and Non-electromagnetic transfer Dynamic motor design, with a light, thin, short, no magnetic field generation and power saving, and other advantages of the structure of the piezoelectric fan for heat dissipation.

The main purpose of the present invention is to reduce the thickness of the design by using a thin piezoelectric actuator assembly, which can save energy consumption, and the piezoelectric actuator assembly is actuated by an electric field, so that no magnetic field is generated around the fan. Affect the operation of other electronic components.

In order to achieve the above object, the present invention is a structure of a piezoelectric fan for heat dissipation, which comprises a support member, and two piezoelectric actuator assemblies fixed on one side of the support member are provided on both sides of the support member, wherein the pressure is The electrically actuated component comprises two conductive elements with a single edge fixed to the support and a piezoelectric element disposed on the conductive element.

Further, a protective cover may be further disposed on the support member mentioned above.

With the above structural composition, since the piezoelectric actuator assembly is fixed to the support member by a single edge, when the bimorph actuator assembly is loaded with an alternating voltage, the design is a U-shaped cavity. The remaining portion of the bimorph actuator assembly is not fixed to the support member, and the relative opening and closing oscillations are generated by the alternating voltage to cause the air to be sucked out and then ejected. In addition, the case can also be installed on both sides of the support member to protect the electrode layer on the piezoelectric actuator assembly from being exposed, so as to achieve light, thin, short, no magnetic field generation and power saving. A number of practical advantages and progress.

In order to achieve the above objects and effects, the technical means and structure adopted by the present invention are described in detail in the preferred embodiment of the present invention, and the features and functions thereof are as follows.

Please refer to the second to seventh figures, which is a three-dimensional schematic diagram of a piezoelectric fan for heat dissipation. A schematic diagram of a piezoelectric actuator assembly. The structure of the piezoelectric fan for heat dissipation can be clearly seen from the figure. The utility model comprises: a support member 11; and two piezoelectric actuation assemblies 12 fixed to the support member 11 by a single edge, wherein the piezoelectric actuation assembly 12 comprises two conductive members fixed on the support member 11 121 and a piezoelectric element 122 disposed on the conductive element 121.

As described above, the effective actuation length ratio of the piezoelectric element 122 to the conductive element 121 is And the effective width is 1 Optimal ratio The support member 11 can be metal, gum, engineering gum, ceramic or composite material, and the conductive member 121 can be metal or conductive composite material.

With the above structure and composition design, the following is a description of the operation of the present invention. Please refer to the second to seventh diagrams at the same time, which is a three-dimensional schematic diagram of the piezoelectric fan for heat dissipation. A schematic view of the moving assembly, as is clear from the figure, since the fixing manner of the conductive member 121 and the supporting member 11 is fixed by a single edge, when the piezoelectric actuator assembly 12 is loaded with an alternating voltage, the piezoelectric actuator assembly 12, the remaining area not fixed on the support member 11 will be deformed and relatively open and closed, and the air is quickly sucked out by the cavity of the cavity generated by the support member 11 and the piezoelectric actuator assembly 12 to generate airflow. Therefore, the size of the cavity is the main factor determining the heat dissipation of the structure of the present case, and the proper design can make the air volume and the noise pressure of the structure of the present invention reach the most appropriate amount. However, in general, the structural shape of the case is assembled with the use end assembly. The requirement may be any shape, but the following description is made by taking a square body as an example. When the appearance of the piezoelectric fan is a square body having a length of 40 mm, a width of 40 mm, and a thickness of 3 mm, the support member 11 and Electrical actuator assembly of the cavity 12 of the outlet to produce an area of 35mm * 1.3mm = 45.5mm ^2, and the wire from the AC input frequency is 200Hz 30v, which is the amount of wind up to 1m ³ / min or more, sufficient to provide a computer central processing unit (CPU) heat dissipation requirement, the sound pressure is 30 dB measured at a distance of 30 cm, for example, the conductive element 121 (Lme) is 34 mm, and the piezoelectric element 122 (Lc) is 18 mm, and the piezoelectric element 122 is disposed at When the conductive element 121 is on the effective length ratio of 14mm (Lme): 2 8mm (Lce) = 0.5, the effective width ratio of the swing is Wce / Wme = 0.96; the power consumption is measured by 30V * 7mA = 0.21W, measured by the actual measurement The data can clearly understand that the case is a cooling fan for power saving.

Please also refer to the eighth to eleventh figures, which is a schematic diagram of a cross-sectional view of a new type of piezoelectric fan with a protective cover for heat dissipation. It can be clearly seen from the figure that the support mentioned in this case The combined structure of the member 11a and the piezoelectric actuator assembly 12a can further provide the protective cover 13a on the support member 11a. By the design of the protective cover 13a, the electrode layer of the piezoelectric actuator assembly 12a can be effectively protected. Exposed practical progress.

However, the above description is only the preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Therefore, all the simple modifications and equivalent structural changes that are made by using the present specification and the drawings are the same. It is included in the scope of this new patent and is given to Chen Ming.

In summary, the structure of the piezoelectric fan for heat dissipation of the present invention can achieve its efficacy and purpose when used, so the novel is a practical and excellent creation, and is in accordance with the requirements of the new patent application. To file an application, I hope that the trial committee will grant this new type as soon as possible to protect the creators' hard work. If there is any doubt in the ruling committee, please do not hesitate to give instructions, the creators will try their best to cooperate and feel good.

[customized components]

2‧‧‧ cooling fan

[component of this case]

11, 11a‧‧‧Support

12, 12a‧‧‧ Piezoelectric actuator components

121‧‧‧Conducting components

122‧‧‧Piezoelectric components

13a‧‧‧Protection cover

The first figure is a schematic diagram of a conventional cooling fan.

The first A is a cross-sectional view of a conventional cooling fan.

The second figure is a three-dimensional schematic diagram of the novel piezoelectric fan for heat dissipation.

The third figure is a schematic exploded view of the piezoelectric fan combination for heat dissipation.

The fourth figure is a schematic view of the new type of piezoelectric fan for heat dissipation.

The fifth figure is a schematic cross-sectional view of the two piezoelectric actuators of the novel heat-dissipating piezoelectric fan.

The sixth figure is a schematic exploded view of the new piezoelectric actuator assembly.

The seventh figure is a three-dimensional schematic diagram of the novel piezoelectric actuator assembly for heat dissipation.

The eighth figure is a three-dimensional schematic view of a piezoelectric fan for heat dissipation with a protective cover.

The ninth diagram is a schematic exploded view of the piezoelectric fan for heat dissipation of the novel protective cover.

The tenth figure is a schematic front view of the piezoelectric fan for heat dissipation with a protective cover.

The eleventh figure is a schematic cross-sectional view of the piezoelectric fan for heat dissipation of the novel protective cover.

11‧‧‧Support

12‧‧‧ Piezoelectric Actuating Components

Claims (6)

A piezoelectric fan structure for heat dissipation includes: a support member; and a piezoelectric actuator assembly having two single-edge edges fixed to the support member, wherein the piezoelectric actuator assembly includes a single-sided edge fixed to the support a conductive element on the piece and a piezoelectric element disposed on the conductive element. The structure of the piezoelectric fan for heat dissipation according to claim 1, wherein the support member is further provided with a protective cover. The structure of the piezoelectric fan for heat dissipation according to claim 2, wherein the protective cover is a metal foil, a resin sheet, a paper sheet or a composite material. The structure of the piezoelectric fan for heat dissipation according to claim 1, wherein the ratio of the effective length of the piezoelectric element to the conductive element is 1≧. ≧0.1, another effective ratio of the piezoelectric element to the conductive element is 1≧ ≧0.5, and the optimum ratio of the effective length of the piezoelectric element to the conductive element is 0.6≧ ≧0.4, the optimum ratio of the effective width of the piezoelectric element to the conductive element is 1≧ ≧0.96. The structure of the piezoelectric fan for heat dissipation according to claim 1, wherein the support member is metal, gum, engineering gum, ceramic or composite material. The structure of the piezoelectric fan for heat dissipation according to claim 1, wherein the conductive member is one of a metal or a conductive composite material.