TWI598029B - Piezoelectric heat sink - Google Patents

Description

Piezoelectric radiator

The invention relates to a heat sink, in particular to a piezoelectric heat sink.

With the pursuit of thinner and higher-efficiency mobile devices such as mobile phones and tablets, traditional heat pipes or fans are no longer available. Therefore, a new type of piezoelectric heatsink has appeared on the market, and its thickness is only 3~4mm, which makes the pressure Electric radiators are more suitable for mounting on thinner mobile devices than heat pipes or fans.

The piezoelectric heat sink mainly comprises a supporting frame and two piezoelectric sheets attached on two sides of the supporting frame, and a cavity is formed between the supporting frame and the two piezoelectric sheets, and the piezoelectric sheet applies an electric field due to the external The change occurs and the reciprocating action of expanding and contracting the volume inside the chamber is continuously performed, and the cold air is continuously sucked from the outside, and the hot air is extruded out of the radiator to dissipate the heat.

However, the piezoelectric heat sink has the following disadvantages, and the support frame has an opening that communicates with the chamber. Since the piezoelectric heat sink flows through the same opening to inject cold air and extrude hot air, it is easy to generate turbulence in the chamber, resulting in turbulence. Hot air cannot be completely discharged into the chamber, and cold air cannot flow into the chamber smoothly, thereby reducing the heat dissipation efficiency of the piezoelectric heat sink.

In view of the above, the inventors of the present invention have made great efforts to solve the above problems by focusing on the above-mentioned prior art, and have made great efforts to solve the above problems, which has become the object of development by the present inventors.

An object of the present invention is to provide a piezoelectric heat sink which utilizes an opening for the inflow of cold air, and the through port passes through the one-way flow piece for the discharge of hot air, thereby avoiding turbulence in the chamber and making heat Air can smoothly exit the chamber, cold air The gas can smoothly flow into the chamber to improve the heat dissipation efficiency of the piezoelectric heat sink.

In order to achieve the above object, the present invention provides a piezoelectric heat sink comprising: a support frame having an opening; and a second piezoelectric vibrating member attached to opposite end faces of the support frame, the support frame and the second The piezoelectric vibrating piece collectively surrounds a chamber, and at least one of the piezoelectric vibrating members is provided with a through hole communicating with the chamber, and each of the piezoelectric vibrating members includes an amplifier and a piezoelectric piece, and the amplifier is attached Attached to the support frame, the piezoelectric piece is attached to the amplifier, the through hole is opened from the amplifier; and at least one one-way flow piece covers the through hole.

The invention also has the following effects:

First, the piezoelectric vibrating member includes an amplifier and a piezoelectric piece, and the piezoelectric piece further enhances the deformation change of the piezoelectric vibrating member through the amplifier, so that more hot air is extruded outside the piezoelectric heat sink, thereby increasing piezoelectric heat dissipation. Heat dissipation capability.

Secondly, the support frame is a compressible elastic frame, which is more convenient for deformation of the electric vibration component to enhance the heat dissipation efficiency of the piezoelectric heat sink.

10‧‧‧Piezoelectric radiator

1‧‧‧Support frame

11‧‧‧ openings

12‧‧‧ end face

13‧‧‧ transverse rod

14‧‧‧straight rod

15‧‧‧ recessed section

2‧‧‧Piezoelectric vibrating parts

21‧‧‧through

22‧‧‧Amplifier

23, 23'‧‧‧ Piezo Pieces

3‧‧‧One-way flow parts

31‧‧‧One-way limiting diaphragm

32‧‧‧ check valve

a, b‧‧‧ thickness

S‧‧‧室

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective exploded view of a first embodiment of a piezoelectric heat sink of the present invention.

2 is a perspective assembled view of a first embodiment of a piezoelectric heat sink of the present invention.

Figure 3 is a cross-sectional view showing a first embodiment of the piezoelectric heat sink of the present invention.

Fig. 4 is a view showing the state of use of the first embodiment of the piezoelectric heat sink of the present invention.

Figure 5 is a perspective assembled view of a second embodiment of the piezoelectric heat sink of the present invention.

Figure 6 is a perspective assembled view of a third embodiment of the piezoelectric heat sink of the present invention.

The detailed description and technical content of the present invention will be described with reference to the accompanying drawings.

Referring to FIG. 1 to FIG. 4 , the present invention provides a first embodiment of a piezoelectric heat sink. The piezoelectric heat sink 10 mainly includes a support frame 1 , a piezoelectric piezo 2 , and one or more One-way flow piece 3.

The support frame 1 has an opening 11 and two end faces 12. As described in detail below, the support frame 1 has a transverse rod 13 and two straight rods 14 extending from opposite ends of the transverse rod 13. The opening 11 is formed between the two straight rods 14, and the two end surfaces 12 are formed on the upper and lower surfaces of the transverse rod 13 and the two straight rods 14.

In addition, the support frame 1 may be made of rubber or silicone material, so that the support frame 1 is a compressible elastic frame; or the support frame 1 has a recessed section 15 formed between the two end faces 12 and recessed inwardly, and the recess The thickness b of the segment 15 is smaller than the thickness a of the support frame 1, so that when the support frame 1 is pressed, the support frame 1 is easily compressed in the direction of the recessed portion 15, so that the support frame 1 is a compressible elastic frame.

Wherein, when the support frame 1 has the recessed section 15, the support frame 1 gradually decreases in thickness from the two end faces 12 toward the recessed section 15, and the cross section of the support frame 1 is V-shaped, but the cross section of the support frame 1 can also be A U shape is not limited by this embodiment.

The two piezoelectric vibrating members 2 are respectively attached to the opposite end faces 12 of the support frame 1. The support frame 1 and the bimorph vibrating piece 2 together define a chamber s, and each of the piezoelectric vibrating members 2 of the present embodiment is provided. There is one or a plurality of through-holes 21 connected to the chamber s, but actually, as long as one of the piezoelectric vibrators 2 is provided with the through-ports 21.

Further, each piezoelectric vibrating member 2 includes an amplifier 22 and a piezoelectric sheet 23. The amplifier 22 is attached to the support frame 1, and the piezoelectric sheet 23 is attached to the amplifier 22. The through-hole 21 is opened from the amplifier 22.

The two-way flow-through member 3 covers the two through-holes 21, and the one-way flow-receiving member 3 is a one-way restricting diaphragm 31. The one-way restricting diaphragm 31 provides airflow from the outside through the through-port 21 into the chamber s, and is restricted. The airflow flows out of the chamber through the through opening 21 from the chamber s.

As shown in FIG. 1 to FIG. 4, the combination of the piezoelectric heat sink 10 of the present invention has an opening 11 by using the support frame 1; the two piezoelectric vibrating members 2 are attached to the opposite end faces 12 of the support frame 1, and the support frame is 1 and the two piezoelectric vibrating reed 2 together surround the chamber s, the piezoelectric vibrator 2 is provided with a through port 21 that communicates with the chamber s, and the unidirectional flow-through member 3 covers the through-hole 21. Thereby, the opening 11 is used for the inflow of cold air, and the through hole 21 is transmitted through the unidirectional flow-through member 3 for the discharge of hot air, thereby avoiding turbulence in the chamber s, so that the hot air can smoothly discharge the chamber s, cold air It can smoothly flow into the chamber s to improve the heat dissipation efficiency of the piezoelectric heat sink 10.

As shown in FIGS. 3 to 4, in the state of use of the piezoelectric heat sink 10 of the present invention, the piezoelectric sheet 23 is deformed by a change in an externally applied electric field, and the piezoelectric sheet 23 is formed. The amplifier 22 further enhances the deformation change of the piezoelectric vibrating member 2, and reciprocates the volume inside the chamber s by expanding and contracting, and continuously sucks cold air from the outside through the opening 11, and then circulates through the through-hole 21 through the one-way circulation. The piece 3 extrudes hot air out of the piezoelectric heat sink 10, and reciprocates to dissipate heat.

In addition, the opening 11 is used for the inflow of cold air, and the through hole 21 is transmitted through the unidirectional flow-through member 3 for the discharge of hot air, so that the inflow of the cold air and the discharge of the hot air adopt different paths to prevent the cold air and the hot air from being in the cavity. The chamber s generates turbulence, so that the hot air can be smoothly discharged into the chamber s, and the cold air can smoothly flow into the chamber s to achieve the heat dissipation efficiency of the piezoelectric radiator 10.

In addition, the piezoelectric sheet 23 further enhances the deformation change of the piezoelectric vibrating member 2 through the amplifier 22, and the reciprocating action of expanding and reducing the volume inside the chamber s is more intense, so that more hot air is extruded into the piezoelectric radiator. In addition to 10, the heat dissipation capability of the piezoelectric heat sink 10 is further increased.

Furthermore, the support frame 1 is a compressible elastic frame, which is more convenient for the electric vibrating member 2 to be deformed to enhance the heat dissipation efficiency of the piezoelectric heat sink 10.

Referring to FIG. 5, which is a second embodiment of the piezoelectric heat sink 10 of the present invention, the second embodiment is substantially the same as the first embodiment, and the second embodiment is different from the first embodiment in one-way circulation. The piece 3 is a check valve 32.

Further, the unidirectional flow-through member 3 is a check valve 32, and the check valve 32 supplies a flow of air from the outside through the through-port 21 into the chamber s, and restricts the flow of air from the chamber s through the through-port 21 to the outside. Thereby, the functions and effects similar to those of the first embodiment are achieved.

Referring to FIG. 6, which is a third embodiment of the piezoelectric heat sink 10 of the present invention, the third embodiment is substantially the same as the first embodiment, and the third embodiment is different from the first embodiment in the piezoelectric vibration. Piece 2 does not contain an amplifier.

As will be described in detail below, each of the piezoelectric vibrators 2 is a piezoelectric sheet 23' which is deformed by a change in an externally applied electric field to reciprocate the volume inside the chamber s. Thereby, the functions and effects similar to those of the first embodiment are achieved.

In summary, the piezoelectric heat sink of the present invention has not been seen in similar products and public Open use, and has industrial utilization, novelty and progressiveness, fully comply with the requirements of new patent applications, and apply for patent law. Please check and grant the patent in this case to protect the rights of the inventor.

10‧‧‧Piezoelectric radiator

1‧‧‧Support frame

11‧‧‧ openings

14‧‧‧straight rod

15‧‧‧ recessed section

2‧‧‧Piezoelectric vibrating parts

21‧‧‧through

22‧‧‧Amplifier

23‧‧‧ Piezo Pieces

3‧‧‧One-way flow parts

31‧‧‧One-way limiting diaphragm

Claims (9)

A piezoelectric heat sink comprising: a support frame having an opening; and a second piezoelectric vibrating member attached to opposite end faces of the support frame, the support frame and the two piezoelectric vibrating piece coextending a cavity At least one of the piezoelectric vibrating members is provided with a through hole communicating with the chamber, and each of the piezoelectric vibrating members includes an amplifier and a piezoelectric piece attached to the supporting frame, the piezoelectric piece Attached to the amplifier, the through opening is opened from the amplifier; and at least one one-way flow-through member covers the through-hole. The piezoelectric heat sink of claim 1, wherein the one-way flow-through member is a one-way restricting diaphragm. The piezoelectric heat sink of claim 1, wherein the one-way flow-through member is a check valve. The piezoelectric heat sink of claim 1, wherein each of the piezoelectric vibrating members is a piezoelectric sheet. The piezoelectric heat sink of claim 1, wherein the support frame has a transverse rod and two straight rods extend from both ends of the transverse rod, the opening being formed between the two straight rods, the two ends Formed on the upper and lower surfaces of the transverse rod and the two orthogonal rods. The piezoelectric heat sink of claim 1, wherein the support frame is a compressible elastic frame. The piezoelectric heat sink according to claim 6, wherein the support frame is made of a rubber or silicone material. The piezoelectric heat sink according to claim 6, wherein the support frame has a recessed portion formed between the two end faces and recessed inward, the recessed section having a thickness smaller than a thickness of the support frame. The piezoelectric heat sink according to claim 8, wherein the support frame is gradually reduced in thickness from the two end faces toward the recessed portion, and the support frame has a V-shaped cross section.