ELECTRIC DRIVER AND ILLUMINATION DEVICE

Abstract

The utility model relates to an electric driver and an illumination device. The electric driver comprises: a carrier; a first electrical component and a second electrical component, wherein the first electrical component and the second electrical component are provided on the carrier; and a heat insulation structure, wherein the second electrical component comprises a first heat insulator surrounding the second electrical component and a second heat insulator surrounding the first heat insulator, wherein a gap is provided between the first heat insulator and a second heat insulator. The electric driver according to the present utility model improves the lifetime of capacitors, is low-cost, and has a compact structure.

Claims

1. An electric driver, comprising: a carrier; a first electrical component and a second electrical component, wherein the first electrical component and the second electrical component are provided on the carrier; and a heat insulation structure, wherein the second electrical component is separated from the first electrical component by means of the heat insulation structure, wherein the heat insulation structure comprises a first heat insulator surrounding the second electrical component and a second heat insulator surrounding the first heat insulator, wherein a gap is provided between the first heat insulator and a second heat insulator.

2. The electric driver according to claim 1, wherein the first electrical component is enveloped by a first medium, the second electrical component is separated from the first medium by means of the gap, and moreover, a second medium is provided in the gap, wherein the second medium has a thermal resistance greater than that of the first medium.

3. The electric driver according to claim 2, wherein the electric driver further comprises a housing, wherein the carrier, the first electrical component and the second electrical component are provided in the housing.

4. The electric driver according to claim 3, wherein the first electrical component is connected to the housing by means of the first medium, and the second electrical component is connected to the housing by means of the second medium.

5. The electric driver according to claim 3, wherein the electric driver further comprises a thermal pad, wherein the end of the second electrical component facing away from the carrier is thermally connected to the housing by means of the thermal pad.

6. The electric driver according to claim 2, wherein the first medium is potting material and the second medium is air.

7. The electric driver according to claim 1, wherein the first electrical component has higher rated temperature than that of the second electrical component.

8. The electric driver according to claim 1, wherein the first heat insulator and the second heat insulator are made of polyethylene terephthalate or fish paper.

9. The electric driver according to claim 1, wherein the second electrical component is a capacitor.

10. An illumination device, comprising: a electric driver, wherein the electric driver comprises: a carrier; a first electrical component and a second electrical component, wherein the first electrical component and the second electrical component are provided on the carrier; and a heat insulation structure, wherein the second electrical component is separated from the first electrical component by means of the heat insulation structure, wherein the heat insulation structure comprises a first heat insulator surrounding the second electrical component and a second heat insulator surrounding the first heat insulator, wherein a gap is provided between the first heat insulator and a second heat insulator.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constitute a portion of the description for further understanding of the present disclosure. These drawings illustrate the embodiments of the present disclosure and explain the principle of the present disclosure together with the description. In the drawings, the same part is represented by the same reference sign. In the drawings,

[0019] FIG. 1 shows a schematic diagram of the electric driver according to the prior art;

[0020] FIG. 2 shows a schematic diagram of the electric driver according to example 1 of the present utility model;

[0021] FIG. 3 shows a schematic diagram of the electric driver according to example 2 of the present utility model; and

[0022] FIG. 4 shows a schematic diagram of the electric driver according to example 3 of the present utility model.

DETAILED DESCRIPTION

[0023] FIG. 2 shows a schematic diagram of the electric driver 100 according to example 1 of the present utility model. The electric driver 100 comprises: a first electrical component 10 and a second electrical component 20, a carrier 1 for bearing the first electrical component 10 and the second electrical component 20, and a heat insulation structure 2; wherein the second electrical component 20 is separated from the first electrical component 10 by means of the heat insulation structure 2, wherein the heat insulation structure 2 comprises a first heat insulator 21 surrounding the second electrical component 20 and a second heat insulator 22 surrounding the first heat insulator 21, wherein a gap 3 is provided between the first heat insulator 21 and a second heat insulator 22.

[0024] Advantageously, the first electrical component 10 can be designed to be an electrical component having a high rated temperature and power, such as MOSFET, a transformer, and a rectifier. The second electrical component 20 can be designed to be an electrical component having a low rated temperature and power, such as an electrolytic capacitor. The carrier 1 can be a printed circuit board which electrically and mechanically connects the first electrical component 10 with the second electrical component 20.

[0025] Advantageously, the heat insulation structure 2 can be made of two layers of insulation sheet with the first layer of insulation sheet directly mounted and fixed on the second electrical component 20 and with the second layer of insulation sheet surrounding the first layer of insulation sheet, and thereby forming, around the second electrical component 20, the gap 3 separated from the first electrical component 10. The insulation sheets can be made of polyethylene terephthalate (PET) or fish paper. Air is provided between the two layers of insulation sheets. When the first electrical component 10 and the second electrical component 20 are assembled on the same carrier 1, the heat of the first electrical component 10 may be conducted to the second electrical component 20. To that end, the second electrical component 20 is separated from the first electrical component 10 by means of the heat insulation structure 2. Accordingly, the heat of the first electrical component 10 will not be directly conducted to the second electrical component 20. Thus, the temperature of the second electrical component 20 will not be increased due to the heat from the first electrical component 10, which particularly improves the lifetime of the second electrical component 20.

[0026] FIG. 3 shows a schematic diagram of the electric driver 100 according to example 2 of the present utility model. The electric driver 100 comprises: a first electrical component 10 and the second electrical component 20, a carrier 1 for bearing the electrical component 10 and the second electrical component 20, and a heat insulation structure 2; the above-mentioned components have structures and functions the same that disclosed in example 1. In addition, the electric driver 100 further comprises a housing 6 for holding the first electrical component 10, the second electrical component 20, and the carrier 1. The housing 6 can be filled with an potting material serving as a first medium 4 and made of, for example, silicon resin or asphalt, and such an potting material is used for sealing at least the first electrical component 10 such that the electrical component is waterproof and dustproof, which ensures that the electrical component is not influenced by the environment outside the housing 6. A second medium 5 having a heat resistance greater than that of the first medium 4, for example, air, is provided between two layers of insulation sheet as a heat insulation structure 2. The second electrical component 20, by means of the heat insulation structure 2, is separated from the first electrical component 10 and the first medium 4 enveloping the first electrical component 10. Accordingly, the heat of the first electrical component 10 will not be directly conducted to the second electrical component 20 or directly conducted to the second electrical component 20 by means of a heat conducted potting material.

[0027] In example 2, as shown in FIG. 3, for example, in a vertical direction of the carrier 1, the potting material is filled between the first electrical component 10 and the housing 6. Accordingly, the heat of the first electrical component 10 can be directly conducted to the housing 6 by means of the potting material, and heat is further dissipated by means of the housing 6. Thus, the heat conduction and dissipation performance of the first electrical component is thereby improved. Upon comparison, no potting material is filled between one end of the second electrical component 20 deviating from the carrier 1 and the housing 6, which causes that the heat of the second electrical component 20 substantially is not conducted by means of the potting material, but conducted to the housing 6 by means of air in the gap 3. Therefore, the heat conducted by the second electrical component 20 to the housing is reduced, the temperature of the housing is further reduced, and the stability of the whole driver is guaranteed.

[0028] FIG. 4 shows a schematic diagram of the electric driver according to example 3 of the present utility model. Example 3 differs from example 2 in that in a vertical direction of the carrier 1, no potting material is filled between the first electrical component 10 and the housing 6, which advantageously reduces the heat conducted from the first electrical component 10 to the housing 6, thereby reducing the temperature of the housing 6 when the airtightness of the first electrical component 10 is ensured simultaneously.

[0029] A thermal pad 7, for example, heat conductive silicone, is further provided between the second electrical component 20 and the housing 6. The thermal pad 7 is particularly provided at one end or top of the second electrical component 20 deviating from the carrier 1, and accordingly, the heat from the second electrical component 20 can be conducted to the housing 6 by means of the thermal pad 7 and the heat is dissipated by means of the housing 6, which further reduces the temperature of the second electrical component 20. In addition, the embodiment of the thermal pad 7 in example 3 as shown in FIG. 4 can be similarly applied to example 2 as shown in FIG. 3 so as to realize highly efficient heat dissipation and rapid temperature reduction of the second electrical component 20, and prolong the lifetime thereof.

[0030] The above-mentioned contents are merely preferable embodiments of the present utility model, not used for limiting the present utility model. As for a person skilled in the art, various amendments and changes can be made to the present utility model. Any amendments, equivalent replacements, improvements, and among others made under the spirit and principle of the present utility model shall be included within the scope of protection of the present utility model.

LIST OF REFERENCE SIGNS

[0031] 1 carrier [0032] 2 heat insulation structure [0033] 3 gap [0034] 4 first medium [0035] 5 second medium [0036] 6 housing [0037] 7 thermal pad [0038] 10 first electrical component [0039] 20 second electrical component [0040] 21 first heat insulator [0041] 22 second heat insulator [0042] 100 electric driver