Heat dissipation device

The present invention provides a heat dissipation device having a speaker box, a heating element and a heat conductor. The speaker box includes a housing having a sound outlet hole and a metal embedding member embedded in the housing. The speaker unit includes a diaphragm. The heat conductor is connected to the heating element. In the present invention, the heat conductor transfers the heat generated by the heating element to the metal embedding member, the metal embedding member conducts heat to the outside of the sound outlet hole through the air in the front cavity.

FIELD OF THE PRESENT DISCLOSURE

The present invention relates to the technical field of heat dissipation, and more particularly to a heat dissipation device using a speaker box.

DESCRIPTION OF RELATED ART

The communication industry has always maintained a high degree of concern about the heat dissipation of heat dissipation devices such as mobile phones, which contain various components that will heat up during operation, generally through the housing of the whole machine, such as metal shells. This will place requirements on the housing material that will affect the circuit layout or antenna performance.

SUMMARY OF THE INVENTION

One of the main objects of the present invention is to provide a heat dissipation device with improved heat dissipation efficiency.

Accordingly, a heat dissipation device is disclosed and comprises:a speaker box having n a housing having a sound outlet hole, a speaker unit accommodated in the housing and a metal embedding member embedded in the housing;a heating element;a heat conductor connected between the speaker box and the heating element; whereinthe housing encloses to form an accommodation space for accommodating the speaker unit;the speaker unit comprises a diaphragm dividing the accommodation space into a front cavity communicated with the outside via the sound outlet hole and a back cavity;the housing includes a first through hole communicated with the front cavity and a second through hole communicated with the back cavity;the metal embedding member comprises a first reinforcement plate embedded in the housing and covering the first through hole correspondingly, and a second reinforcement plate extending from the first reinforcement plate and covering the second through hole, edges of the metal embedding member are all embedded in the housing;the heat conductor is connected with the second reinforcement plate at one end, and connected with the heating element at another end;the heat conductor transfers the heat generated by the heating element to the metal embedding member, the metal embedding member conducts the heat to the front cavity and out of the sound outlet hole through the air in the front cavity.

Further, the housing comprises a top wall directly facing and spaced from the diaphragm, a bottom wall opposite to the top wall and a side wall bending and extending from the edge of the top wall toward the bottom wall, and the first through hole and the second through hole are arranged spaced apart in the top wall.

Further, the housing further comprises a support wall extending from the top wall to within the accommodation space, the speaker unit is fixed with the support wall and arranged spaced with respect to the top wall, and the support wall is arranged spaced apart between the front cavity and the back cavity.

Further, the sound outlet hole is formed at the side wall, a front acoustic cavity is formed by a spacing between the diaphragm and the top wall directly facing the diaphragm, the housing is formed with a sound channel connecting the front acoustic cavity and the sound outlet hole, and the front cavity comprises the front acoustic cavity and the sound channel.

Further, the housing further comprises a separation wall separating the sound channel from the back cavity, the separation wall extends from a side of the speaker unit near the sound outlet hole toward the side wall; the separation wall, the top wall and the side wall encloses to form the sound channel.

Further, the first reinforcement plate comprises a main body part directly facing the diaphragm and a bent part bent from the edges of the main body part toward the bottom wall and embedded in the housing, the second reinforcement plate bends and extends from the bent part.

Further, at least a portion of the bent part is embedded in the support wall.

Further, the main body part and the second reinforcement plate are both plate-shaped, and the metal embedding member is integrally formed.

Further, the heat dissipation device further comprising a housing for fixing the speaker box and the heating element, wherein the side wall is attached and fixed correspondingly to the housing, a plurality of sound holes communicated with the sound outlet holes correspondingly are arranged through the housing.

Further, wherein the metal embedding member is plate-shaped and is integrally injection molded with the housing.

Further, the heat conductor is a solid heat conductor.

Further, the heat conductor is a heat conduct tube having a cooling liquid therein.

Further, the heat conductor comprises a contact part superposed on the second reinforcement plate and a connection part extending from one side of the contact part and connected with the heating element.

Further, the contact part is wider than the connection part.

Further, a front projection of the contact part on the second reinforcement plate covers more than two-thirds of the surface of the second reinforcement plate.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENT

The present disclosure will hereinafter be described in detail with reference to an exemplary embodiment. To make the technical problems to be solved, technical solutions and beneficial effects of the present disclosure more apparent, the present disclosure is described in further detail together with the figure and the embodiment. It should be understood the specific embodiment described hereby is only to explain the disclosure, not intended to limit the disclosure.

It should be noted that all the directional indications (such as upper, lower, inner, outer, top part, bottom part, etc.) in the embodiment of the present invention are only used to explain the relative position relationship among the components under a certain specific posture (as shown in the accompanying drawings); if such certain specific posture is changed, the directional indication is changed accordingly.

It should also be noted that when an element is referred to as being “fixed” or “disposed” on another element, the element may be directly on the other element or there may be intervening elements at the same time. When an element is called “connected” to another element, it may be directly connected to the other element or there may be intervening elements at the same time.

Referring toFIGS.1-7, the embodiment of the present invention provides an heat dissipation device, the heat dissipation device comprises a housing10, a speaker box20, a heating element30, and a heat conductor40connected between the speaker box20and the heating element30. The speaker box20, the heating element30, and the heat conductor40are all installed in the housing10, and heat generated in the heating element30can be introduced into the speaker box20by the heat conductor40, then the air is discharged out of the housing10continuously by the speaker box20. The heating element30in the embodiment can be the CPU or the battery of the mobile phone or any component in the mobile phone which needs heat dissipation.

Specifically, referring toFIGS.3-6, the speaker box20comprises a housing21having sound outlet holes211, a speaker unit25accommodated in the housing21and a metal embedding member26embedded on the housing21. The housing21encloses to form an accommodation space22for accommodating the speaker unit25, and the sound outlet hole211is provided through the housing21. The speaker unit25comprises a diaphragm251, the diaphragm251separates the accommodation space22into a front cavity23and a back cavity24; and when conducting heat, the heat conductor40transfers the heat generated by the heating element30onto the metal embedding member26. The diaphragm251, in operation, can generate a high-speed airflow in the area of the front cavity23, creating an air cooling effect so that metal embedding member26continuously conducts heat into the front cavity23. Several sound holes11corresponding to the sound outlet holes211are arranged through on the housing10, and the front cavity23is communicated with the outside through the sound outlet hole211.

Referring toFIGS.1and2, a first through hole212connected to the front cavity23and a second through hole213connected to the back cavity24are provided on the housing21. The metal embedding member26comprises a first reinforcement plate261embedded in the housing21and covering the first through hole212correspondingly, and a second reinforcement plate262extending from the first reinforcement plate261and covering the second through hole213; the edges of the metal embedding member26are all embedded on the housing21, preferably, the metal embedding member26is plate-shaped and is integrally injection molded with the housing21; the heat conductor40is attached directly to the second reinforcement plate262of the metal embedding member26.

In this embodiment, the heat conductor40is connected to the second reinforcement plate262at one end, the heat conductor40is connected to the heating element30at another end. The heat conductor40transfers the heat generated by the heating element30to the metal embedding member26, the metal embedding member26transfers the heat to the front cavity23. The diaphragm251on the speaker unit25can transfer the hot air in the front cavity23to the outside of the sound outlet holes211via the sound outlet holes211and the sound hole11for convective heat exchange with the outside air.

The speaker unit25in this embodiment can input a pulse signal of lower frequency (less than 1000 Hz) to drive the diaphragm251in the speaker unit25to vibrate when performing heat dissipation work, pushing the front cavity23air flow to form the air cooling effect. The pulse signal can be played separately when the speaker box20is not performing a music playing task; the pulse signal may be superimposed into the music signal when performing a music playback task. The signal is an ultra-low frequency pulse signal, which will not be heard by human ears and will not affect the normal listening effect.

In this embodiment, the housing21comprises a top wall214directly facing and spaced apart from the diaphragm251, a bottom wall215opposite to the top wall214, the side wall216bending and extending from the edge of the top wall214toward the bottom wall215and a support wall217extending from the top wall214into the accommodation space22. The top wall214, side wall216and the bottom wall215enclose to form the accommodation space22. The first through hole212and the second through hole213are provided spaced apart from each other at the top wall214. The support wall217is provided spaced apart between the front cavity23and the back cavity24, and the speaker unit25is fixed to the support wall217and spaced from the top wall214. The diaphragm251is located at the top of the speaker unit25and opposite to the wall top214.

As a preferred embodiment, the front cavity23comprise a front acoustic cavity231and a sound channel232, the sound outlet holes211are formed at the side wall216, the front acoustic cavity231is formed by the spacing between the diaphragm251and the top wall214directly facing the diaphragm251. The housing21forms a sound channel232that connects the front acoustic cavity231and the sound outlet hole211, and the side wall216of the housing21is attached to the housing10. Front acoustic cavity231, sound channel232, sound outlet hole211, and sound hole11are connected in that order.

As a preferred embodiment, the housing21also comprises a separation wall218that space sound channel232and back cavity24, The separation wall218extends from the side of the speaker unit25near the sound outlet hole211toward the side wall216, the separation wall218, Top wall214and side wall216enclose sound channel232.

As a preferred embodiment, the first reinforcement plate261comprises a main body part263directly facing the diaphragm251and a bent part264bending from the edges of the main body part263toward the bottom wall215and embedded in the housing21. The second reinforcement plate262bends and extends from the bent part264, and at least part of the bent part264is embedded in the support wall217so as to support the metal embedding member26. The main body part263and the second reinforcement plate262are flat plates, and the main body part263on the metal embedding member26, the bent part264and the second reinforcement plate262are integrally formed, so as to reduce the production cost of the speaker box20.

In the embodiment, the heat conductor40may be a solid heat conductor, and the heat conductor40and the metal embedding member26may be fixedly connected by welding or gluing; of course, the heat conductor40can also be a heat pipe with built-in coolant, and in such case, the heat conductor40and the metal embedding member26can be fixedly connected by welding.

In the present invention, the heat conductor40comprises a contact part41stacked on the second reinforcement plate262and a connection part42extending from one side of the contact part41and connected to the heating element30. The width of the contact part41is larger than that of the connection part42so as to increase the heat dissipation of the heat conductor40. Specifically, the front projection of the contact part41on the second reinforcement plate262covers more than ⅔ of the surface of the second reinforcement plate262.

The two ends of the heat conductor40are defined as an input end and a condensing end respectively. When the heat dissipation device of the present invention is practically used, the input end of the heat conductor40in the mobile phone can be tightly attached to the heating element30such as the CPU, the condensing end can be tightly attached to the surface of the metal embedding member26of the speaker box20, with the heat entering via the input end. When the heat conductor40is a heat conducting tube with a cooling liquid built therein, the cooling liquid at the input end is heated and evaporated, passes through the hollow heat conducting tube and is gradually cooled at a lower-temperature condensing end, and is changed from steam to liquid again, then it flows back to the input end from the heat conduction tube, and repeats this process continuously, so that the heat generated by the heating element30is rapidly transferred to the metal embedding member26, then the metal embedding member26conducts the heat into the front cavity23, and the heat in the heat conductor40is rapidly exported to the outside air by utilizing the air cooling effect of the speaker unit25, so as to achieve the combined effect of liquid cooling and air cooling. It will greatly improve the heat dissipation efficiency, and it can quickly and effectively dissipate heat.