Piezoelectric vibration heat dissipation device

Abstract

The utility model discloses a piezoelectric vibration heat dissipation device which comprises a heat conduction base and at least one vibration assembly, the heat conduction base is provided with an air guide groove, the vibration assembly comprises an elastic substrate and a piezoelectric unit, the elastic substrate is arranged on the heat conduction base and located in the air guide groove, the piezoelectric unit is arranged on the elastic substrate, and the piezoelectric unit is arranged on the elastic substrate and located in the air guide groove. The piezoelectric unit can enable the elastic substrate to deform to generate vibration, the piezoelectric unit drives the elastic substrate to repeatedly deform to generate vibration, the vibration can guide air flow to pass through the air guide groove, the air flow takes away heat on the heat conduction base, and therefore heat dissipation is conducted on working equipment. Popularization and application are easy.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation equipment, in particular to a piezoelectric vibration heat dissipation device. Background Art

[0002] The heat dissipation device can be set on the surface of the running equipment. Heat will be generated during the operation of the running equipment, and the heat can be conducted to the heat dissipation device. The heat dissipation device usually includes a heat exchanger and a fan. The heat exchanger contacts the surface of the running equipment to conduct heat. The fan blows air toward the heat exchanger. When the airflow passes through the heat exchanger, it can take away the heat on the heat exchanger. However, the fan is large in size, which causes the heat dissipation device to occupy a large space. For application scenarios with relatively narrow space, traditional heat dissipation devices are not applicable. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a piezoelectric vibration heat dissipation device, which uses vibration to guide wind flow for heat dissipation, saves space, and is easy to promote and apply.

[0004] According to a first aspect of the utility model, a piezoelectric vibration heat dissipation device includes: a heat-conducting base provided with an air guide groove; at least one vibration component, including an elastic substrate and a piezoelectric unit, the elastic substrate is arranged on the heat-conducting base and located in the air guide groove, the piezoelectric unit is arranged on the elastic substrate, and the piezoelectric unit can cause the elastic substrate to deform to generate vibration.

[0005] A piezoelectric vibration heat dissipation device according to an embodiment of the utility model has at least the following beneficial effects:

[0006] In the piezoelectric vibration heat dissipation device of the utility model, a heat-conducting base can be arranged on the working equipment to be cooled. When the working equipment is running, heat is transferred to the heat-conducting base to provide AC power for the piezoelectric unit. The piezoelectric unit drives the elastic substrate to deform repeatedly to generate vibration. The vibration can guide the wind to pass through the air guide groove, and the wind takes away the heat on the heat-conducting base, thereby dissipating the heat for the working equipment. This design uses vibration to guide the wind to dissipate heat, saves space, and is easy to promote and apply.

[0007] According to some embodiments of the utility model, there are multiple vibration components, and the multiple vibration components are arranged along the length direction of the air guide groove. The elastic substrate is set along the depth direction of the air guide groove, and two adjacent elastic substrates and two side walls of the air guide groove define a blast groove.

[0008] According to some embodiments of the present invention, two adjacent elastic substrates can deform toward the blowing groove between the two elastic substrates to narrow the blowing groove, and two adjacent elastic substrates can deform away from the blowing groove between the two elastic substrates to expand the blowing groove.

[0009] According to some embodiments of the utility model, the piezoelectric unit includes a piezoelectric ceramic sheet, a first surface electrode, a second surface electrode and a third surface electrode, the first surface electrode and the second surface electrode are arranged on the first surface of the piezoelectric ceramic sheet, the third surface electrode is arranged on the second surface of the piezoelectric ceramic sheet, the first surface and the second surface are back to back to each other, and the piezoelectric ceramic sheet is attached to the elastic substrate through the first surface or the second surface.

[0010] According to some embodiments of the utility model, first slots are provided on both side walls of the air guide groove, and the first slots extend along the depth direction of the air guide groove, and both side edges of the elastic substrate are correspondingly inserted into the first slots on both sides.

[0011] According to some embodiments of the utility model, the thermally conductive base is provided with a ventilation hole penetrating the thermally conductive base on the mounting surface of the air guide groove, the mounting surface is the bottom surface or the side wall surface of the air guide groove, the elastic substrate is laid on the mounting surface along the length direction of the air guide groove, and a first ventilation gap connected to the ventilation hole is provided between the elastic substrate and the mounting surface.

[0012] According to some embodiments of the utility model, there are multiple vibration components, and multiple elastic substrates are arranged along the length direction of the air guide groove. A second ventilation gap connected to the ventilation port is provided between two adjacent elastic substrates.

[0013] According to some embodiments of the utility model, second slots are provided on both side walls of the air guide groove, and the second slots extend along the length direction of the air guide groove, and both side edges of the elastic substrate are correspondingly inserted into the second slots on both sides.

[0014] According to some embodiments of the utility model, the mounting surface of the air guide groove is provided with a groove, and the ventilation opening is opened at the bottom surface of the groove.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the piezoelectric vibration heat dissipation device of the utility model;

[0018] Figure 2 A top view of the first embodiment of the piezoelectric vibration heat dissipation device of the utility model;

[0019] Figure 3 A three-dimensional schematic diagram of one embodiment of a vibration assembly;

[0020] Figure 4 It is a three-dimensional schematic diagram of the second embodiment of the piezoelectric vibration heat dissipation device of the utility model;

[0021] Figure 5 It is a front view of the second embodiment of the piezoelectric vibration heat dissipation device of the utility model;

[0022] Figure 6 This is an exploded view of the second embodiment of the piezoelectric vibration heat dissipation device of the utility model.

[0023] Reference numerals:

[0024] Thermal conductive base 100; air guide groove 110; first slot 120; second slot 130; vent 140; groove 150; vibration assembly 200; elastic substrate 210; piezoelectric unit 220; piezoelectric ceramic sheet 221; first surface electrode 222; second surface electrode 223; blast groove 300; first ventilation gap 400; second ventilation gap 500. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1-Figure 6 As shown, a piezoelectric vibration heat dissipation device according to an embodiment of the first aspect of the utility model includes a thermal conductive base 100 and at least one vibration component 200, the thermal conductive base 100 is provided with an air guide groove 110, the vibration component 200 includes an elastic substrate 210 and a piezoelectric unit 220, the elastic substrate 210 is arranged on the thermal conductive base 100 and is located in the air guide groove 110, the piezoelectric unit 220 is arranged on the elastic substrate 210, and the piezoelectric unit 220 can cause the elastic substrate 210 to deform to generate vibration.

[0030] The thermally conductive base 100 may be made of a metal or alloy material with high thermal conductivity, and the elastic substrate 210 may be a metal or alloy sheet with elasticity, such as Figure 3 As shown, the piezoelectric unit 220 is in the form of a sheet and is attached to the elastic substrate 210. The piezoelectric unit 220 can be a conventional piezoelectric ceramic sheet 221 or other device. When the piezoelectric unit 220 is energized with a first direction current, the piezoelectric unit 220 can drive the surface of the elastic substrate 210 to stretch from the center point where the piezoelectric unit 220 is attached to the surroundings, thereby driving the surface to which the piezoelectric unit 220 is attached to convex. When the piezoelectric unit 220 is energized with a second direction current, the piezoelectric unit 220 can drive the surface of the elastic substrate 210 to shrink from the surroundings where the piezoelectric unit 220 is attached to the center point, thereby driving the surface to which the piezoelectric unit 220 is attached to be concave, wherein the first direction current and the second direction current are opposite to each other.

[0031] Specifically, there may be a plurality of air guide grooves 110 , and a piezoelectric unit 220 may be disposed in each of the air guide grooves 110 .

[0032] In the piezoelectric vibration heat dissipation device of the present invention, the heat-conducting base 100 can be arranged on the working equipment to be cooled. When the working equipment is running, the heat is transferred to the heat-conducting base 100, and the piezoelectric unit 220 is provided with AC power supply. The piezoelectric unit 220 drives the elastic substrate 210 to deform repeatedly to generate vibration. The vibration can guide the wind flow to pass through the wind guide groove 110, and the wind flow takes away the heat on the heat-conducting base 100, thereby dissipating the heat for the working equipment. The present design uses vibration to guide the wind flow for heat dissipation, saves space, and is easy to promote and apply.

[0033] In some embodiments of the present invention, Figure 1 , 2 As shown, there are multiple vibration components 200, and the multiple vibration components 200 are arranged along the length direction of the air guide groove 110. The elastic substrate 210 is set along the depth direction of the air guide groove 110, and the two adjacent elastic substrates 210 and the two side walls of the air guide groove 110 define a blast groove 300.

[0034] When the vibration assembly 200 vibrates, the wall surface of the blast groove 300 surrounded by the elastic pole pieces vibrates so that air flows in the blast groove 300 , thereby dissipating heat for the wall surface of the thermal conductive base 100 .

[0035] In some embodiments of the present invention, Figure 2 As shown, two adjacent elastic substrates 210 can deform toward the air blowing slot 300 between the two elastic substrates 210 to narrow the air blowing slot 300 , and two adjacent elastic substrates 210 can deform away from the air blowing slot 300 between the two elastic substrates 210 to expand the air blowing slot 300 .

[0036] Based on the characteristics of the piezoelectric unit 220, when alternating current is applied to the piezoelectric unit 220, the piezoelectric unit 220 can make the elastic substrate 210 vibrate back and forth. By applying currents in different directions to the piezoelectric units 220 on two adjacent elastic substrates 210, the two adjacent elastic substrates 210 can be moved closer to the blast groove 300 between the two elastic substrates 210, thereby narrowing the blast groove 300, or the two adjacent elastic substrates 210 can be moved away from the blast groove 300 with their backs turned away from the blast groove 300 between the two elastic substrates 210, thereby expanding the blast groove 300. The repeated back and forth movement causes the blast groove 300 to sometimes narrow and sometimes expand, thereby guiding the movement of wind flow and improving the heat dissipation efficiency.

[0037] In some embodiments of the present invention, the piezoelectric unit 220 includes a piezoelectric ceramic sheet 221, a first surface electrode 222, a second surface electrode 223 and a third surface electrode (not shown in the figure), the first surface electrode 222 and the second surface electrode 223 are arranged on the first surface of the piezoelectric ceramic sheet 221, the third surface electrode is arranged on the second surface of the piezoelectric ceramic sheet 221, the first surface and the second surface are back to back to each other, and the piezoelectric ceramic sheet 221 is attached to the elastic substrate 210 through the first surface or the second surface.

[0038] The first surface electrode 222 is connected to one pole of the power supply, and the second surface electrode 223 is connected to the other pole of the power supply. The current can flow from the first surface electrode 222 through the piezoelectric ceramic sheet 221 to the third surface electrode, and then from the third surface electrode through the piezoelectric ceramic sheet 221 to the second surface electrode 223. Alternatively, the current can flow from the second surface electrode 223 through the piezoelectric ceramic sheet 221 to the third surface electrode, and then from the third surface electrode through the piezoelectric ceramic sheet 221 to the first surface electrode 222. Since the first surface electrode 222 and the second surface electrode 223 are arranged on the first surface electrode 222, the current can flow from the second surface electrode 223 through the piezoelectric ceramic sheet 221 to the third surface electrode, and then from the third surface electrode through the piezoelectric ceramic sheet 221 to the first surface electrode 222. One surface, the third surface electrode is arranged on the second surface, which is equivalent to the opposite movement of the position on the piezoelectric ceramic sheet 221 that is opposite to the first surface electrode 222 and the position that is opposite to the second surface electrode 223. Therefore, when the piezoelectric unit 220 is attached to the elastic substrate 210, the periphery can be retracted toward the attachment center, or the center can be expanded toward the periphery. Specifically, the first surface electrode 222 and the second surface electrode 223 can be located between the first surface and the surface of the elastic substrate 210, or the third surface electrode is located between the second surface and the surface of the elastic substrate 210.

[0039] It can be understood that the first surface electrode 222 and the third surface electrode and the piezoelectric ceramic component between the first surface electrode 222 and the third surface electrode form a first capacitor, the second surface electrode 223 and the third surface electrode and the piezoelectric ceramic component between the second surface electrode 223 and the third surface electrode form a second capacitor, the first capacitor and the second capacitor are connected in series and play a voltage divider role, the voltage shared on each capacitor is reduced, the high voltage resistance performance of the piezoelectric ceramic component is greatly improved, and the AC power can also be directly connected to the circuit of the first capacitor and the second capacitor, which is convenient and reliable to use.

[0040] Specifically, Figure 2As shown, in two adjacent vibration components 200, the piezoelectric unit 220 of each vibration component 200 is located on the same side of the elastic substrate 210, and the first surface electrode 222 of one of the piezoelectric units 220 is electrically connected to the second surface electrode 223 of the other piezoelectric unit 220, and the second surface electrode 223 of one of the piezoelectric units 220 is electrically connected to the first surface electrode 222 of the other piezoelectric unit 220, which is equivalent to supplying the first surface electrode 222 of one of the piezoelectric units 220 with the second surface electrode 223 of the other piezoelectric unit 220 when the first direction current is supplied, thereby enabling the elastic substrates 210 on both sides of the blowing slot 300 to simultaneously move inwardly toward the blowing slot 300 or outwardly toward the expansion.

[0041] It is also understandable that, among two adjacent blast slots 300 in the same air guide slot 110 , if one blast slot 300 is compressed, the other blast slot 300 will expand.

[0042] Specifically, the patterns of the first surface electrode 222 , the second surface electrode 223 and the third surface electrode may be various, such as semicircular, annular, circular, rectangular, etc., and the elastic substrate 210 may also be selected in various shapes, such as circular or rectangular.

[0043] In some embodiments of the utility model, first slots 120 are provided on both side walls of the air guide groove 110 , and the first slots 120 extend along the depth direction of the air guide groove 110 , and both side edges of the elastic substrate 210 are correspondingly inserted into the first slots 120 on both sides.

[0044] Specifically, a plurality of first slots 120 may be arranged along the length direction of the air guide slot 110. The first slots 120 on the left and right sides of the air guide slot 110 form a group. Each group of first slots 120 corresponds to an elastic substrate 210. The elastic substrate 210 may be directly inserted into the first slots 120 from the slot mouth direction of the air guide slot 110 toward the slot bottom direction. The installation and disassembly are simple, and the structure is easy to implement, thus saving processing costs.

[0045] In some embodiments of the present invention, Figure 4 , 5 As shown in Figure 6, the thermal conductive base 100 is provided with a vent 140 penetrating the thermal conductive base 100 on the mounting surface of the air guide groove 110, and the mounting surface is the bottom surface or the side wall surface of the air guide groove 110. The elastic substrate 210 is laid on the mounting surface along the length direction of the air guide groove 110, and a first ventilation gap 400 connected with the vent 140 is provided between the elastic substrate 210 and the mounting surface.

[0046] When the piezoelectric unit 220 causes the elastic substrate 210 to vibrate, the external wind flow can be compressed at the first ventilation gap 400 and enter the vent 140, thereby directly dissipating the heat of the working equipment. At the same time, the wind flow passing through the surface of the thermal conductive base 100 can also take away the heat of the thermal conductive base 100 and dissipate the heat for the working equipment.

[0047] In some embodiments of the present invention, there are multiple vibration components 200, and multiple elastic substrates 210 are arranged along the length direction of the air guide groove 110. A second ventilation gap 500 connected to the ventilation port 140 is provided between two adjacent elastic substrates 210.

[0048] When the vibration assembly 200 vibrates, the actuated wind flow can also enter the vent 140 from the second ventilation gap 500, providing more wind flow to dissipate heat for the working equipment.

[0049] In some embodiments of the utility model, the two side walls of the air guide groove 110 are provided with second slots 130, and the second slots 130 extend along the length direction of the air guide groove 110, and the two side edges of the elastic substrate 210 are correspondingly inserted into the second slots 130 on both sides.

[0050] The second slot 130 can be located near the bottom of the second slot 130, and the ends of the second slot 130 can extend to the two ends of the air guide groove 110. Multiple elastic substrates 210 can be inserted into the second slot 130 from the ends of the air guide groove 110. The installation and disassembly are simple, and the structure is easy to implement, saving processing costs.

[0051] In some embodiments of the present invention, Figure 6 As shown, the mounting surface of the air guide groove 110 is provided with a groove 150, and the vent 140 is opened on the bottom surface of the groove 150. The mounting surface of the air guide groove 110 can support the elastic substrate 210, and the groove 150 can expand the cross-section of the first ventilation gap 400, making it easier for wind flow to pass through, thereby increasing the wind flow rate to dissipate heat.

[0052] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A piezoelectric vibration heat dissipation device, characterized in that: include: A heat-conducting base is provided with an air guide groove; At least one vibration component includes an elastic substrate and a piezoelectric unit. The elastic substrate is arranged on the thermal conductive base and located in the air guide groove. The piezoelectric unit is arranged on the elastic substrate. The piezoelectric unit can deform the elastic substrate to generate vibration.

2. A piezoelectric vibration heat dissipation device according to claim 1, characterized in that: There are multiple vibration components, which are arranged along the length direction of the air guide groove. The elastic substrate is set along the depth direction of the air guide groove. Two adjacent elastic substrates and two side walls of the air guide groove define a blast groove.

3. A piezoelectric vibration heat dissipation device according to claim 2, characterized in that: The two adjacent elastic substrates can be deformed toward the air blowing groove between the two elastic substrates to narrow the air blowing groove, and the two adjacent elastic substrates can be deformed away from the air blowing groove between the two elastic substrates to expand the air blowing groove.

4. A piezoelectric vibration heat dissipation device according to claim 3, characterized in that: The piezoelectric unit includes a piezoelectric ceramic sheet, a first surface electrode, a second surface electrode and a third surface electrode, the first surface electrode and the second surface electrode are arranged on the first surface of the piezoelectric ceramic sheet, the third surface electrode is arranged on the second surface of the piezoelectric ceramic sheet, the first surface and the second surface are back to back to each other, and the piezoelectric ceramic sheet is attached to the elastic substrate through the first surface or the second surface.

5. The piezoelectric vibration heat dissipation device according to claim 2, characterized in that: The two side walls of the air guide groove are provided with first slots, the first slots extend along the depth direction of the air guide groove, and the two side edges of the elastic substrate are correspondingly inserted into the first slots on both sides.

6. A piezoelectric vibration heat dissipation device according to claim 2, characterized in that: The thermally conductive base is provided with a ventilation hole penetrating the thermally conductive base on the mounting surface of the air guide groove, and the mounting surface is the bottom surface or the side wall surface of the air guide groove. The elastic substrate is laid on the mounting surface along the length direction of the air guide groove, and a first ventilation gap connected to the ventilation hole is provided between the elastic substrate and the mounting surface.

7. A piezoelectric vibration heat dissipation device according to claim 6, characterized in that: There are multiple vibration components, and multiple elastic substrates are arranged along the length direction of the air guide groove. A second ventilation gap connected to the ventilation port is provided between two adjacent elastic substrates.

8. The piezoelectric vibration heat dissipation device according to claim 6, characterized in that: The two side walls of the air guide groove are provided with second slots, the second slots extend along the length direction of the air guide groove, and the two side edges of the elastic substrate are correspondingly inserted into the second slots on both sides.

9. The piezoelectric vibration heat dissipation device according to claim 6, characterized in that: The mounting surface of the air guide slot is provided with a groove, and the vent is opened on the bottom surface of the groove.

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