TWI736445B - Heat dissipating device - Google Patents

Abstract

A heat dissipating device is provided to solve the problem of conventional ceiling fan control device with poor heat dissipating and the limitation of assembly spaces. This heat dissipating device includes an outer case, a main board, a substrate and a heat dissipating fin. The outer case has the first lid and the second lid, the first lid is detachably attached to the second lid, and the bottom of the first lid has an engaging groove. The outer case is accommodating the main board. The main board has an engaging portion. The substrate has an engaging portion on the edge of substrate. The engaging portion is vertically and detachably attached to the engaging portion of main board. The surface of substrate has wires to electrically connect at least one heating element. The heat dissipating fin is disposed in the engaging groove of the first lid.

Description

Heat sink

The present invention relates to a heat dissipation device, in particular to a heat dissipation device used for a ceiling fan control device to improve heat dissipation efficiency and save assembly space.

With the technological development of electronic technology, the future trend of miniaturizing electronic components and improving the operation speed and effects of electronic components is the future trend. Electronic products are used in a wide range of fields. Ceiling fans are one of the common applications in daily life. When the ceiling fan is in operation, because the ceiling fan controller is often placed in a closed box, the electronic components in the ceiling fan controller are likely to accumulate excessive heat energy per unit area, which will cause the heat dissipation problem to become more serious and cause the electronic components The performance of the operation deteriorates, and even the entire device is burned. At present, the heat dissipation device used in ceiling fan controllers, in order to make the electronic components work normally, the electronic components on the circuit board or the motherboard are mainly equipped with a heat sink, and then the heat is discharged by the heat sink.

However, if the conventional heat dissipation device is assembled in an electronic control device with a large number of electronic components or a more complex electronic control device, the heat dissipation effect is limited in a limited installation space, which may lead to poor heat dissipation effect or even damage.

In view of this, it is indeed necessary to improve the conventional heat sink.

In order to solve the above-mentioned problems, the purpose of the present invention is to provide a heat sink, which can Those who enhance the heat dissipation effect.

The second objective of the present invention is to provide a heat dissipation device that can save installation space.

The directionality described in the full text of the present invention or its similar terms, such as "front", "rear", "left", "right", "up (top)", "down (bottom)", "inner", "outer" , "Side", etc., mainly refer to the direction of the attached drawings. The terms of the directionality or similar terms are only used to assist in the description and understanding of the embodiments of the present invention, and are not used to limit the present invention.

The elements and components described in the full text of the present invention use the quantifiers "one" or "one" for convenience and to provide the general meaning of the scope of the present invention; in the present invention, it should be construed as including one or at least one, and single The concept of also includes the plural, unless it clearly implies other meanings.

Approximate terms such as "combination", "combination" or "assembly" mentioned in the full text of the present invention mainly include the types that can be separated without destroying the components after being connected, or the components cannot be separated after being connected, which are common knowledge in the field Those can be selected based on the materials of the components to be connected or assembly requirements.

The heat dissipating device of the present invention may include: a housing with a first housing and a second housing, the first housing and the second housing are detachably assembled, and the bottom of the first housing has A groove; a main board accommodated in the housing, the main board having a joint part; a base plate, there is a clamping part by the circumferential mask, the clamping part is vertically coupled to the joint part of the main board, the substrate A surface of the first housing has a circuit to electrically connect at least one heating element; and a heat dissipation fin is disposed in the groove of the first housing, and the groove of the first housing has a slot hole in the groove of the substrate. The engaging portion passes through the slot hole, and the end surface of the engaging portion abuts against the surface of the heat dissipation fin.

Accordingly, in the heat sink of the present invention, a heating element such as a heating transistor is arranged on a surface of the substrate, and the substrate is vertically clamped to the main board. In this way, the heating element can be lowered. The substrate occupies the space of the motherboard, and the end surface of the engaging portion of the substrate can abut against the heat dissipation fins of the housing to directly conduct heat energy to the heat dissipation fins, which can increase the heat dissipation area. In addition, another part of the substrate The second heat dissipation fin can also be provided on the surface, so that the second heat dissipation fin can also absorb the heat generated by the heating element to dissipate a large amount of heat. In this way, the overall heat dissipation efficiency can be improved, and the main board can be increased. The installation space has the effect of improving heat dissipation and increasing use space.

Wherein, the substrate is made of aluminum metal material. In this way, the substrate can achieve high thermal conductivity and has the effect of improving thermal conductivity.

Wherein, the substrate and the main board are combined by soldering. In this way, the substrate and the main board can be firmly combined to form an electrical connection, which has the effect of improving structural stability and circuit conduction.

Wherein, a plurality of circuit patterns may be arranged on the engaging portion of the substrate, so that the heating element of the substrate is electrically connected to the main board. In this way, the heating element of the substrate and the main board can easily form an electrical connection, which has the effect of improving circuit conduction.

Wherein, a thermally conductive insulating layer may be provided between the contact surface of the substrate and the main board to cover the circuit to form electrical insulation. In this way, electrical insulation and thermal conductivity can be formed at the same time, and the heat dissipation effect of the heating element can also be improved, which has the effect of avoiding short circuits and improving heat conduction.

Wherein, the thermally conductive insulating layer is made of aluminum oxide, silicon carbide or boron nitride. In this way, the substrate and the main board can form electrical insulation and have good thermal conductivity, and have the effects of avoiding short circuits and improving thermal conductivity.

Wherein, the size of the heat dissipation fin can be close to the size of the motherboard. In this way, the heat energy of the motherboard can be dispersed in a large amount and the heat dissipation area can be increased, which has the effect of improving heat dissipation efficiency and dispersing heat energy.

Wherein, the heat dissipation fins are made of copper, aluminum, nickel or alloy metal materials. In this way, it can have high heat conduction properties to achieve a better heat dissipation effect, and it has the effect of improving heat dissipation.

Wherein, the heat dissipating device may further have a second heat dissipating fin, and the second heat dissipating fin is coupled to the other surface of the substrate. In this way, the heat source generated by the heating element of the substrate can be directly conducted to the second heat dissipation fin to dissipate the heat energy, which has the effect of improving heat dissipation and uniform heat dissipation.

1: shell

1a: first shell

1b: second housing

11: Groove

12: Slot

13: cooling holes

2: Motherboard

21: Electronic components

22: Joint

3: substrate

31: The card joint

32: heating element

33: Thermally conductive insulating layer

4: cooling fins

4’: Second cooling fin

P: Soldering Department

[Figure 1] An exploded perspective view of the first embodiment of the present invention.

[Figure 2] A sectional view of the assembly of the first embodiment of the present invention.

[Figure 3] A partially exploded perspective view of the second embodiment of the present invention.

In order to make the above and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention will be described in detail in conjunction with the accompanying drawings as follows: Please refer to Figure 1. It is the first embodiment of the present invention, and includes a housing 1, a main board 2, a base board 3, and a heat dissipation fin 4, the main board 2 is accommodated in the housing 1, and the base board 3 is combined on the main board 2. The heat dissipation fin 4 is connected to the surface of the housing 1.

The housing 1 has a first housing 1a and a second housing 1b, and the first housing 1a and the second housing 1b are detachably assembled. In this embodiment, the first housing 1a may be a base and made of metal material, and the second housing 1b may be an upper cover that fits the first housing 1a. The bottom of the first housing 1 a may have a groove 11, and the groove 11 has a slot 12. The housing 1 may have a plurality of heat dissipation holes 13, which can dissipate the heat energy in the housing 1 and have the function of assisting heat dissipation.

The main board 2 is a printed circuit board for installing a number of electronic components 21. The master The board 2 is connected in the lower casing 11, and the connection method can be a locking or a clamping method, which is not limited by the present invention. The main board 2 may have a coupling portion 22 so that the substrate 3 can be coupled to the main board 2.

The substrate 3 may be made of a thermally conductive material, and the substrate 3 is preferably made of aluminum metal material, which has the characteristics of low thermal resistance. The substrate 3 can be formed into a long plate shape to be integrated in the space of the main board 2, and the number or shape of the substrate 3 is not limited in the present invention. The circumferential surface of the base plate 3 has a protruding engaging portion 31 so that the engaging portion 31 can be vertically coupled to the coupling portion 22 of the main board 2. A circuit on a surface of the substrate 3 can be electrically connected to at least one heating element 32, and the heat source of the heating element 32 can be conducted to the substrate 3. The heating element 32 can be an active element (such as a transistor) or a control element. The heating element 32 refers to an electronic element that generates heat in an electronic device. The number of the heating element 32 is not limited in the present invention. In this embodiment, the substrate 3 is connected to six heating elements 32, and the heating elements 32 are connected to the substrate 3 through a surface adhesion method.

Please refer to FIG. 2, after the engaging portion 31 of the substrate 3 is coupled to the coupling portion 22 of the motherboard 2, a solder portion P can be used to connect the substrate 3 and the motherboard 2 by soldering. In this embodiment, the engaging portion 31 of the substrate 3 is provided with several circuit patterns. Through the connection of the substrate 3 and the main board 2, the heating element 32 of the substrate 3 and the main board 2 can be electrically connected. In order to prevent the contact between the substrate 3 and the main board 2 from causing a short circuit, a thermally conductive insulating layer 33 is preferably provided between the contact surface of the substrate 3 and the main board 2 to cover the circuit formation on the substrate 3 Electrical insulation. The thermally conductive insulating layer 33 can be made of materials such as aluminum oxide, silicon carbide, or boron nitride, which has an insulating effect and high thermal conductivity, which can improve the heat dissipation effect of the heating element 32.

Please refer to FIGS. 1 and 2, the heat dissipation fin 4 is disposed in the groove 11 of the first housing 1 a to dissipate heat in the housing 1. The heat dissipation fins 4 can be arranged in the groove 11 by clamping, fitting or bonding, etc., which is not limited by the present invention. The heat dissipation fins 4 can be made of metal materials such as copper, aluminum, nickel, or alloys, and have high heat conduction properties, which can achieve better heat dissipation effects. The present invention does not limit the material and size of the heat dissipation fins 4. In this embodiment, the heat dissipation fin The size of the sheet 4 is slightly close to that of the main board 2, and is of a rectangular plate-shaped structure, which can evenly disperse the heat energy and increase the heat dissipation area. In addition, after the engaging portion 31 of the substrate 3 is coupled to the engaging portion 22 of the main board 2, the engaging portion 31 can preferably pass through the slot 12 in the groove 11 so that the end surface of the engaging portion 31 can be Abutting on the surface of the heat dissipation fin 4 (as shown in Figure 2). In this way, the thermal energy of the substrate 3 can be directly transferred to the heat dissipation fin 4, which has the effect of improving the heat conduction speed and heat dissipation efficiency.

The heat dissipating device of this embodiment can be applied to a ceiling fan control device. The heating element 32 is first arranged on the substrate 3. Since the substrate 3 is vertically clamped to the main board 2, this can prevent the substrate 3 from occupying the The space of the motherboard 2 can further increase the space for the electronic components 21 of the motherboard 2, and the heat generated by the heating element 32 during operation can be directly transferred to the radiating fins 4. In addition, the thermal energy of the motherboard 2 can be It is absorbed by the casing 1, and then conducts heat to the heat dissipation fins 4, and the waste heat is dissipated to the heat dissipation fins 4 through the heat dissipation holes 13 of the casing 1. The size of the heat dissipation fins 4 is preferably similar to that of the motherboard 2 is a rectangular plate shape, in this way, the overall heat dissipation area can be increased to uniformly dissipate heat, and the waste heat accumulation on the main board 2 can be reduced, which can prevent the overall device from burning and prolong the service life of the heating element 32.

Please refer to Figure 3, which is the second embodiment of the heat dissipation device of the present invention. Compared with the first embodiment, in this embodiment, the heat dissipation device may further have a second heat dissipation fin 4'. The second heat dissipation fin 4 ′ can be disposed on the other surface of the substrate 3. The second heat dissipation fin 4'can be made of metal materials such as copper, aluminum, nickel, or alloy, and has high thermal conductivity properties, which can minimize the thermal resistance and make the heat source generated by the heating element 32 of the substrate 3 directly Conducted to the second heat dissipation fin 4', the present invention does not limit the material and size of the second heat dissipation fin 4'. In this embodiment, the size of the second heat dissipation fin 4'is preferably slightly close to the size of the substrate 3 to effectively dissipate heat. In this way, the second heat dissipation fin 4'can increase the heat dissipation area of the substrate 3 to dissipate heat, which has the effect of improving heat dissipation.

In summary, in the heat sink of the present invention, a heating element such as a heating transistor is arranged on a surface of the substrate, and the substrate is vertically clamped to the main board. In this way, the occupation of the main board by the substrate can be reduced. The end surface of the engaging portion of the substrate can abut against the heat dissipation fins of the housing to directly conduct heat to the heat dissipation fins, which can increase the heat dissipation area. In addition, the other surface of the substrate can also be provided The second heat dissipation fin allows the second heat dissipation fin to also absorb the heat generated by the heating element to dissipate a large amount of heat. In this way, the overall heat dissipation efficiency can be improved, and the installation space of the motherboard can be increased. It has the effect of improving heat dissipation and increasing use space.

Although the present invention has been disclosed using the above-mentioned preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art without departing from the spirit and scope of the present invention may make various changes and modifications relative to the above-mentioned embodiments. The technical scope of the invention is protected. Therefore, the scope of protection of the invention shall be subject to the scope of the attached patent application.

1: shell

1a: first shell

1b: second housing

11: Groove

12: Slot

13: cooling holes

2: Motherboard

21: Electronic components

22: Joint

3: substrate

31: The card joint

32: heating element

4: cooling fins

Claims (9)

A heat dissipating device, comprising: a housing with a first housing and a second housing, the first housing and the second housing are detachably assembled, and the bottom of the first housing has a groove ; A main board housed in the housing, the main board has a joining part; a substrate, from the circumferential mask has a clamping part, the clamping part is vertically coupled to the main board joint part, a surface of the substrate There is a circuit for electrically connecting at least one heating element; and a heat dissipation fin disposed in the groove of the first housing. The groove of the first housing has a slot hole through which the engaging portion of the substrate passes The slot and the end surface of the engaging portion abut against the surface of the heat dissipation fin. Such as the heat dissipation device of claim 1, wherein the substrate is made of aluminum metal material. According to the heat dissipation device of claim 1, wherein the substrate and the main board are combined by soldering. For example, the heat dissipation device of claim 1, wherein a plurality of circuit patterns are arranged on the engaging portion of the substrate, so that the heating element of the substrate is electrically connected to the main board. According to the heat dissipation device of claim 1, wherein a thermally conductive insulating layer is provided between the contact surface of the substrate and the main board to cover the circuit to form electrical insulation. For example, the heat dissipation device of claim 5, wherein the thermally conductive insulating layer is made of aluminum oxide, silicon carbide, or boron nitride. According to the heat dissipation device of claim 1, wherein the size of the heat dissipation fin is close to the size of the motherboard. For example, the heat dissipation device of claim 1, wherein the heat dissipation fins are made of copper, aluminum, nickel or alloy metal materials. The heat dissipation device of claim 1, wherein the heat dissipation device further has a second heat dissipation fin, and the second heat dissipation fin is coupled to the other surface of the substrate.

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