TWI705224B - Heat dissipation structure of transformer - Google Patents

Abstract

A heat dissipation structure of a transformer. The transformer defines a first end and a second end opposite to the first end on an axis. The heat dissipation structure includes a heat dissipation member provided at the first end and a connecting member. The element has a substrate provided at the second end of the transformer and two connecting arms respectively extending from two sides of the substrate toward the second end and assembled with the two sides of the heat sink. After the connecting element is assembled with the heat sink Surround the transformer together. In this way, the problem that the conventional structure cannot be used as long as it encounters manufacturing errors or size changes is solved.

Description

Heat dissipation structure of transformer

The invention relates to a heat dissipation structure of a transformer, in particular to a heat dissipation structure in which a heat sink is directly installed on the transformer.

According to the investigation, in order to increase the heat dissipation capacity of the transformer during the implementation process, some manufacturers proposed a transformer heat sink such as the Republic of China Announcement No. 460106, which has hook-shaped latches extending downward on both sides of the transformer heat sink. When assembling, the bottom end of the transformer is buckled with the buckle part, so that the heat sink of the transformer is placed on the top of the transformer like a hat. Although this method can enable the transformer to obtain the heat dissipation effect of the transformer heat sink, as long as there is a tolerance during the manufacturing process of the clamping portion, the transformer heat sink may not be reliably fixed on the transformer. In addition, once the aforementioned embodiment encounters a change in the size of the transformer, it is difficult to adjust and cannot be used.

The main purpose of the present invention is to solve the problem that the conventional structure is affected by the structural tolerance and the radiator cannot be installed reliably.

To achieve the above objective, the present invention provides a heat dissipation structure of a transformer, the transformer defines a first end and a second end opposite to the first end on an axis. The heat dissipating structure includes a heat dissipating element provided at the first end and a connecting element. The connecting element has a substrate provided at the second end of the transformer and two extending from two sides of the substrate toward the second end and connected with each other. The two sides of the heat sink are assembled with connecting arms, the base plate contacts an iron core of the transformer, and the connecting piece and the heat sink are assembled together to surround the transformer.

In one embodiment, the transformer includes a bobbin and a set of iron cores on the bobbin, and the bobbin has a plurality of outlet pins arranged at the second end.

In one embodiment, the iron core has a top provided at the first end and on which the heat sink is stacked, a bottom provided at the second end, and two connections that connect the top and bottom sides, respectively unit.

In an embodiment, the heat dissipation structure includes a heat conduction element sandwiched between the heat dissipation element and the transformer. Further, the heat conducting element can be arranged between the heat dissipation element and the top.

In one embodiment, the two connecting arms are parallel to the two connecting parts and make contact.

In one embodiment, the connecting member has an extension piece extending from one of the two sides of the substrate where the two connecting arms is not provided and parallel to the substrate to increase the contact area between the connecting member and the transformer. Further, in an embodiment, the sum of the width of the extension piece and the substrate is less than or equal to the width of the bottom.

In one embodiment, the connecting arm has an extension section connecting the substrate and a mounting section connecting the extension section and the heat sink assembly, and the extension section has a width smaller than the mounting section.

Compared with the conventional ones, the present invention has the following characteristics through the foregoing disclosure: the present invention discards the previous implementation of using hooks, and uses the U-shaped connector to assemble the heat sink. In this way, the problem that the conventional structure cannot be used once manufacturing error or size change occurs.

10: Heat dissipation structure

11: heat sink

111: The first mounting hole

12: Connector

121: substrate

122: connecting arm

123: Extension piece

124: Extension

125: Installation section

126: second mounting hole

13: Thermal conductive parts

20: Transformer

21: first end

22: second end

23: Winding frame

231: Outgoing pin

24: iron core

241: top

242: bottom

243: Connection

30: axis

FIG. 1 is a schematic diagram of a three-dimensional structure of an embodiment of the present invention.

Figure 2 is an exploded schematic view of a three-dimensional structure of an embodiment of the present invention.

Fig. 3 is a schematic cross-sectional view of the structure of an embodiment of the present invention.

The detailed description and technical content of the present invention are now described in conjunction with the drawings as follows:

1 to 3, the present invention provides a heat dissipation structure 10 of a transformer. The implementation of the transformer 20 can be horizontal or vertical. The transformer 20 defines a first end 21 and a first end 21 on an axis 30. In contrast to the second end 22 of the first end 21, the axis 30 can be a vertical axis or a horizontal axis. This text is a clear description of the technology, so the figure is shown with the axis 30 as the vertical axis. Further, the transformer 20 includes a winding frame 23 and a set of iron cores 24 connected to the winding frame 23. In one embodiment, the winding frame 23 has a plurality of outlet connections arranged at the second end 22 The pin 231, in this embodiment, the second end 22 refers to the outlet position of the plurality of windings on the transformer 20, and can also refer to the end of the transformer 20 provided on a circuit board. Accordingly, in this embodiment, the first end 21 refers to the top of the transformer 20. On the other hand, the iron core 24 may be composed of multiple sub-iron cores, such as EE iron cores, ER iron cores, EI iron cores, etc. commonly used in the industry. Furthermore, the iron core 24 and the winding frame 23 are assembled The configuration can be changed according to the implementation of the transformer 20.

In addition, the heat dissipation structure 10 of the present invention includes a heat dissipation member 11 and a connecting member 12, wherein the heat dissipation member 11 can be implemented as an integrally formed member or an assembly composed of a plurality of parts. In addition, the heat dissipation member 11 can be a block. Shaped or block structure with fins. On the other hand, the basic configuration of the connecting member 12 is U-shaped. The connecting member 12 has a base plate 121 and two connecting arms 122 extending from two sides of the base plate 121. Further, the length of the connecting arm 122 is at least longer than The length of one side of the core 24. During implementation, the heat sink 11 and the base plate 121 are respectively located at the first end 21 and the second end 22, the base plate 121 is in further contact with the iron core 24, and the connecting member 12 is arranged to surround the iron core 24, so that The connecting arm 122 extends toward the first end 21 and is assembled to two sides of the heat sink 11. After assembly, the connection The member 12 not only restricts one side of the heat dissipation member 11 to the first end 21, but also surrounds the transformer 20 together with the heat dissipation member 11. Further, the heat sink 11 and the connecting piece 12 can be assembled by an adhesive or a joining part. When the heat sink 11 and the connecting part 12 are implemented by the joining part, the heat sink 11 and the connecting part 12 The connecting member 12 respectively has at least one first mounting hole 111 and at least one second mounting hole 126 for providing the assembly of the joining parts. Furthermore, the first mounting hole 111 and the second mounting hole 126 may be non-corresponding structures. For example, the first mounting hole 111 may be a round hole, and the second mounting hole 126 may be a long hole. Furthermore, since the connecting arm 122 protrudes from the first end 21 of the transformer 20 during the implementation of the present invention, the heat sink 11 can be assembled under the condition that the connecting arm 122 can be contacted. Tolerance problems occur and cannot be assembled. In addition, in the present invention, the size of the connecting arm 122 can be designed so that the heat sink 11 receives a force in the direction of the iron core 24, so that the heat sink 11 is more stably mounted on the iron core 24 to avoid improper assembly. There is a gap between the heat sink 11 and the iron core 24, which affects heat conduction.

In addition, when the transformer 20 is a vertical transformer, the iron core 24 can define a top 241 provided at the first end 21, a bottom 242 provided at the second end 22, and two connected to the The connecting portion 243 on the two sides of the top 241 and the bottom 242. In this embodiment, the heat sink 11 is disposed corresponding to the top 241 of the iron core 24 and is stacked on the iron core 24. The substrate 121 of the connecting member 12 is disposed corresponding to the bottom 242 of the iron core 24, that is, the substrate 121 is located on the side of the winding frame 23 that provides wires or is assembled with a circuit board. In addition, the two connecting arms 122 extend along the connecting portion 243 toward the first end 21. Furthermore, the connecting member 12 of the present invention can be made of metal material, so that the heat of the iron core 24 away from the heat sink 11 can be dissipated through the connecting member 12 or led to the heat sink. Further, the two connecting arms 122 can be parallel to the two connecting portions 243 and make contact, so that the contact area between the connecting piece 12 and the iron core 24 is increased, and the heat dissipation effect is improved.

Please refer to FIG. 2 again. In one embodiment, the heat dissipation structure 10 includes a heat conduction element 13 sandwiched between the heat dissipation element 11 and the transformer 20. Further, the heat conduction element 13 can be further provided on the iron core 24 Of the top 241. The heat-conducting element 13 serves as a heat-conducting bridge between the heat-dissipating element 21 and the transformer 20 so that the heat on the transformer 20 can be transferred to the heat-dissipating element 11 via the heat-conducting element 13. Moreover, the drawing in FIG. 2 herein is only an example, and is not intended to limit the configuration of the heat conducting member 13.

Please refer to FIG. 2 again. In one embodiment, the connecting member 12 has an extension piece 123 extending from one side of the substrate 121 where the two connecting arms 122 are not provided and parallel to the substrate 121. Thereby, the connecting member 12 can increase the contact area between the connecting member 12 and the transformer 20, so that the heat dissipation structure 10 is more stable. In one embodiment, the sum of the widths of the extension piece 123 and the substrate 121 is less than or equal to the width of the bottom 242. In another embodiment, each of the connecting arms 122 has an extension section 124 connected to the substrate 121 and a mounting section 125 connected to the extension section 124 and assembled with the heat sink 11, and the width of the extension section 124 is smaller than the mounting section. The width of the segment 125. In this way, the connecting arm 122 not only has the function of installing the heat sink 11, but also restricts the assembly position of the heat sink 11 at the same time.

The above is only a preferred embodiment of this creation, and should not be used to limit the scope of implementation of this creation, that is, all equivalent changes and modifications made in accordance with the scope of the patent application for this creation should still fall within the scope of the patent for this invention.

10: Heat dissipation structure

11: heat sink

12: Connector

122: connecting arm

126: second mounting hole

20: Transformer

21: first end

22: second end

23: Winding frame

231: Outgoing pin

24: iron core

Claims (10)

A heat dissipation structure of a transformer. The transformer defines a first end and a second end opposite to the first end on an axis. The heat dissipation structure includes: a heat dissipation element disposed on the first end of the transformer; and The connecting member has a base plate provided at the second end of the transformer and two connecting arms respectively extending from two sides of the base plate toward the second end and assembled with the two sides of the heat sink, and the base plate contacts an iron of the transformer Core, the connecting piece and the heat sink are assembled together to surround the transformer. The heat dissipation structure of the transformer according to claim 1, wherein the transformer includes a bobbin and a set of iron cores on the bobbin, and the bobbin has a plurality of outlet pins arranged at the second end. The heat dissipation structure of the transformer according to claim 2, wherein the iron core has a top provided at the first end and on which the heat dissipating element is stacked, a bottom provided at the second end, and two are respectively connected to the top The connection part with the two sides of the bottom. The heat dissipation structure of the transformer according to claim 3, wherein the heat dissipation structure includes a heat conducting element sandwiched between the heat dissipation element and the top. According to claim 3, the heat dissipation structure of the transformer, wherein the two connecting arms are parallel to the two connecting parts and make contact. The heat dissipation structure of the transformer according to claim 3, wherein the connecting member has an extension from one of the two sides of the substrate where the two connecting arms is not provided and is parallel to the substrate to increase the contact area between the connecting member and the transformer Extension piece. The heat dissipation structure of the transformer according to claim 6, wherein the sum of the width of the extension piece and the substrate is less than or equal to the width of the bottom. The heat dissipation structure of the transformer according to any one of claims 1 to 7, wherein the connecting arm has an extension section connecting the substrate and a mounting section connecting the extension section and the heat sink assembly, and the extension section has a width smaller than the Installation section. The heat dissipation structure of the transformer according to claim 1 or 2, wherein each of the connecting members has a side extending from one side of the substrate where the two connecting arms are not provided and parallel to the substrate to increase the contact between the connecting member and the transformer Area extension piece. The heat dissipation structure of the transformer according to claim 1 or 2, wherein the heat dissipation structure includes a heat conduction element sandwiched between the heat dissipation element and the transformer.

Images