Power amplifier board of intelligent sound box

Abstract

The power amplifier board comprises a power amplifier board body and a heat dissipation mechanism, the heat dissipation mechanism comprises a heat conduction plate installed on the upper surface of the power amplifier board body and a shell located outside the heat conduction plate and used for wrapping the heat conduction plate, and a heat dissipation fan is installed on the inner wall of the middle of the upper surface of the shell; a plurality of cooling fins distributed at equal intervals are fixedly arranged on the upper surface of the heat conduction plate, and the heat dissipation mechanism further comprises smearing assemblies located between every two adjacent cooling fins and traction assemblies used for moving the smearing assemblies. The shell capable of inputting cold air in a one-way mode is arranged outside the heat conduction plate, so that the cold air cannot flow back, generated hot air flows upwards under the action of the cold air and is discharged rapidly through the cooling fan finally, and during the period, the smearing assemblies and the traction assemblies located between the cooling fins are used for smearing the cold air. Cooling liquid can be evenly smeared on the outer surfaces of all the cooling fins up and down, and flowing cold air is matched for rapid evaporation.

Description

Technical Field

[0001] The present invention relates to the technical field of power amplifier boards, and in particular to a power amplifier board for an intelligent speaker. Background Art

[0002] Amplifier board, also known as power amplifier circuit board, is a circuit board that can amplify the input signal and output a stronger signal. In smart speakers, the main function of the amplifier board is to amplify the audio signal so that it can drive the speaker to vibrate and make sound. It is an indispensable part of the smart speaker system and is directly related to the output power and sound quality of the speaker.

[0003] The power amplifier board of the existing smart speaker generally relies on a cooling fan and a heat sink for heat dissipation and cooling. However, since the heat generated by the power amplifier board in the later operation is higher than the heat generated in the earlier operation, the heat dissipation effect produced by the cooperation of the external cooling fan and the heat sink is relatively stable, and the heat dissipation effect cannot be improved, resulting in poor heat dissipation effect in the later stage. For this reason, a power amplifier board of a smart speaker is provided. Summary of the invention

[0004] The purpose of the present invention is to provide a power amplifier board for an intelligent speaker to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the specific technical scheme of the present invention is as follows: A power amplifier board of an intelligent audio system, comprising a power amplifier board body and a heat dissipation mechanism, the heat dissipation mechanism comprising a heat conducting plate installed on the upper surface of the power amplifier board body, and a shell located outside the heat conducting plate and used to wrap the heat conducting plate, the shell is connected to the power amplifier board body, a cooling fan is installed on the inner wall in the middle of the upper surface of the shell, a plurality of heat sinks are fixedly provided on the upper surface of the heat conducting plate and are distributed at equal intervals, the heat dissipation mechanism also comprises a coating component located between each adjacent two heat sinks, which is used to coat coolant on the outer surface of the heat sink, and a traction component for moving each coating component.

[0006] Preferably, multiple air guide holes are opened through both sides of the outer surface of the shell and are distributed at equal intervals, and the air guide holes are designed in a conical structure, and multiple heat dissipation holes are opened through the outer surface of the heat sink and are distributed at equal intervals.

[0007] Preferably, the traction assembly includes two guide rails fixedly mounted at both ends of the heat conducting plate, and a horizontal plate fixedly mounted in the middle of the upper surface of each heat conducting fin. The two guide rails are symmetrically arranged with respect to the longitudinal center axis of the heat conducting plate. A threaded rod is rotatably mounted inside the guide rail, and a synchronous pulley is fixedly mounted in the middle of the outer end of the threaded rod. The two synchronous pulleys are driven by a toothed transmission belt.

[0008] Preferably, a support leg sleeve is slidably provided on the inner surface of the guide rail, and a lifting leg is elastically provided inside the support leg sleeve through a reset spring, a cross bar is provided between the two lifting legs, and the two ends of the cross bar are respectively connected to the two lifting legs, and rollers are rotatably installed on the outer surface of the cross bar and located at each cross plate position, the support leg sleeve and the threaded rod are arranged through threaded engagement, and the outer end of one of the threaded rods is connected and assembled with the output end of the external driving member, and a plurality of rounded heads are provided on the upper surface of the cross plate and are evenly spaced, and an arc surface is used to transition between two adjacent rounded heads.

[0009] Preferably, the heat dissipation mechanism also includes a control unit for turning the motor on and off, and the control unit includes a motor switch module, a temperature detection module and a logic control module, all of which are installed on the upper surface of the heat conduction plate. The temperature detection module is used to monitor the temperature of the outer surface of the power amplifier board body in real time, and the logic control module is used to receive and transmit signals. The motor switch module, temperature detection module, logic control module and motor are electrically connected.

[0010] Preferably, the application assembly includes a liquid storage box, the outer surface of the top of the liquid storage box is provided with a hanging plate for supporting and fixing the liquid storage box, the two ends of the hanging plate are respectively connected to the liquid storage box and the cross bar, the top of the liquid storage box is provided with a filling port for filling coolant, and the inner surface of the filling port is slidably inserted with a plug.

[0011] Preferably, multiple adapter tubes are provided at both ends of the outside of the liquid storage box and are distributed at equal intervals. The adapter tube and the liquid storage box are elastically arranged by an extrusion spring, a telescopic tube for conveying coolant is provided in the middle of one end of the adapter tube, and a ball sleeve is provided in the middle of the other end of the adapter tube, the inlet end of the adapter tube is connected with the outlet end of the telescopic tube, one end of the telescopic tube is connected to the adapter tube, and the other end of the telescopic tube extends to the interior of the liquid storage box, a sponge for absorbing coolant is provided inside the adapter tube, a coating ball for smearing the absorbed coolant is rotatably installed inside the ball sleeve, and the outer surface of the coating ball is in contact with the outer surface of the heat sink.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a shell for one-way input of cold air on the outside of the heat conduction plate, so that the cold air will not flow back, and the generated hot air will flow upward under the action of the cold air, and finally be quickly discharged by the heat dissipation fan. During this period, the coolant can be evenly applied to the outer surface of each heat sink by using the coating component and the traction component located between the heat sinks. The coolant can evaporate quickly with the flowing cold air, and the heat generated by the power amplifier board body during the later operation can be quickly absorbed and discharged, effectively improving the overall heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view of the local structure of the present invention Figure 1 ; Figure 3 It is a partial cross-sectional enlarged view of the present invention Figure 1 ; Figure 4 It is a partial cross-sectional enlarged view of the present invention Figure 2 ; Figure 5 It is a side view of the local structure of the present invention Figure 2 ; Figure 6 It is a planar partial cross-sectional view of the present invention.

[0014] In the figure: 100, power amplifier board body; 200, shell; 201, air guide hole; 300, cooling fan; 400, heat dissipation mechanism; 500, heat conduction plate; 501, heat sink; 502, heat dissipation hole; 600, traction assembly; 601, guide rail; 602, cross plate; 603, roller; 604, cross bar; 605, rounded head; 606, lifting foot; 607, foot cover; 608, toothed transmission belt; 609, synchronous pulley; 610, threaded rod; 611, reset spring; 700, smearing assembly; 701, plug; 702, hanging plate; 703, liquid storage box; 704, filling port; 705, telescopic tube; 706, extrusion spring; 707, ball cover; 708, smearing ball; 709, sponge; 710, adapter tube. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] See also Figure 1-6The present invention provides a technical solution: an amplifier board of an intelligent audio system, comprising an amplifier board body 100 and a heat dissipation mechanism 400, wherein the heat dissipation mechanism 400 comprises a heat conducting plate 500 mounted on the upper surface of the amplifier board body 100, and a shell 200 located outside the heat conducting plate 500 and used to wrap the heat conducting plate 500, the shell 200 is connected to the amplifier board body 100, a heat dissipation fan 300 is installed on the inner wall of the middle part of the upper surface of the shell 200, and is used to discharge the hot air accumulated inside the shell 200, and a plurality of air guide holes 201 are opened on both sides of the outer surface of the shell 200 and are evenly spaced, and are used to introduce cold air from the outside and gradually dissipate the hot air inside the shell 200 to the outside. The air flows upward and is quickly discharged by the provided cooling fan 300. The air guide hole 201 is designed in a conical structure for one-way input of the introduced cold air to avoid backflow of the cold air. A plurality of heat sinks 501 distributed at equal intervals are fixedly provided on the upper surface of the heat conducting plate 500. A plurality of heat dissipation holes 502 distributed at equal intervals are provided on the outer surface of the heat sink 501 to increase the contact area between the heat sink 501 and the cold air and improve the heat dissipation effect. In the device, the heat dissipation mechanism 400 also includes a coating component 700 located between each two adjacent heat sinks 501, for coating the outer surface of the heat sink 501 with coolant, and a traction component 600 for moving each coating component 700.

[0017] Specifically, the traction assembly 600 includes two guide rails 601 respectively fixedly mounted at both ends of the heat conducting plate 500, and a cross plate 602 fixedly mounted in the middle of the upper surface of each heat sink 501. The two guide rails 601 are symmetrically arranged about the longitudinal center axis of the heat conducting plate 500. A threaded rod 610 is rotatably mounted inside the guide rail 601. A synchronous pulley 609 is fixedly mounted in the middle of the outer end of the threaded rod 610. The two synchronous pulleys 609 are driven by a toothed transmission belt 608. A support leg sleeve 607 is slidably mounted on the inner surface of the guide rail 601. A lifting leg 606 is elastically mounted inside the support leg sleeve 607 through a reset spring 611. A cross bar 604 is arranged between the two lifting legs 606. The two ends of the cross bar 604 are respectively connected to the two lifting legs 606. Rollers 603 are rotatably mounted on the outer surface of the cross bar 604 and located at the positions of each cross plate 602. The support leg sleeve 607 is connected to the threaded rod 610 and the support leg sleeve 607 is connected to the threaded rod 610. The threaded rod 610 is arranged by threaded engagement, wherein the outer end of one of the threaded rods 610 and the external driving member is a motor, and is not marked in the accompanying drawings. As a prior art, the output end connection assembly is not described in detail here. The upper surface of the cross plate 602 is provided with a plurality of equally spaced rounded heads 605 for lifting the set roller 603, thereby lifting the cross bar 604. An arc surface transition is provided between two adjacent rounded heads 605. The heat dissipation mechanism 400 also includes a control unit for turning the motor on and off. The control unit includes a motor switch module, a temperature detection module and a logic control module, all of which are installed on the upper surface of the heat conducting plate 500. The temperature detection module is used to monitor the temperature of the outer surface of the power amplifier board body 100 in real time, and the logic control module is used to receive and transmit signals. The motor switch module, the temperature detection module, the logic control module and the motor are electrically connected.

[0018] Specifically, the application component 700 includes a liquid storage box 703, the interior of the liquid storage box 703 is filled with coolant, the coolant is ethanol, the outer surface of the top of the liquid storage box 703 is provided with a hanging plate 702 for supporting and fixing the liquid storage box 703, the two ends of the hanging plate 702 are respectively connected to the liquid storage box 703 and the cross bar 604, the top of the liquid storage box 703 is provided with a filling port 704 for filling the coolant, the inner surface of the filling port 704 is slidably inserted with a plug 701, which is used to block the filling port 704 to prevent the coolant from leaking, the plug 701 is made of rubber material, and the two ends of the outside of the liquid storage box 703 are provided with a plurality of transfer tubes 710 distributed at equal intervals, and the transfer tubes 710 The transfer tube 710 is elastically arranged with the liquid storage box 703 through the extrusion spring 706, and a telescopic tube 705 for conveying the coolant is arranged in the middle of one end of the transfer tube 710, and a ball sleeve 707 is arranged in the middle of the other end of the transfer tube 710, the inlet end of the transfer tube 710 is connected with the outlet end of the telescopic tube 705, one end of the telescopic tube 705 is connected to the transfer tube 710, and the other end of the telescopic tube 705 extends to the interior of the liquid storage box 703, and a sponge 709 for absorbing the coolant is arranged inside the transfer tube 710, and a coating ball 708 for smearing the absorbed coolant is rotatably installed inside the ball sleeve 707, and the outer surface of the coating ball 708 is in contact with the outer surface of the heat sink 501.

[0019] According to the above, the present invention sets a shell 200 on the outside of the heat conduction plate 500 for one-way input of cold air, so that the cold air will not flow back, and the generated hot air will flow upward under the action of the cold air, and finally be quickly discharged by the cooling fan 300. During this period, the coolant can be evenly applied to the outer surface of each heat sink 501 by using the coating component 700 and the traction component 600 located between each heat sink 501. With the rapid evaporation of the flowing cold air, the heat generated by the power amplifier board body 100 in the later operation can be quickly absorbed and discharged, and the overall heat dissipation effect can be effectively improved.

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A power amplifier board for an intelligent audio system, comprising a power amplifier board body (100) and a heat dissipation mechanism (400), characterized in that: The heat dissipation mechanism (400) comprises a heat conducting plate (500) mounted on the upper surface of the power amplifier board body (100), and a shell (200) located outside the heat conducting plate (500) and used to wrap the heat conducting plate (500), the shell (200) being connected to the power amplifier board body (100), a heat dissipation fan (300) being mounted on the inner wall in the middle of the upper surface of the shell (200), a plurality of heat dissipation fins (501) being fixedly arranged on the upper surface of the heat conducting plate (500) and distributed at equal intervals, the heat dissipation mechanism (400) further comprising a coating component (700) located between each two adjacent heat dissipation fins (501) and used to coat the outer surface of the heat dissipation fins (501), and a traction component (600) for moving each coating component (700).

2. The power amplifier board of the smart speaker according to claim 1, characterized in that: Both sides of the outer surface of the shell (200) are penetrated by a plurality of air guide holes (201) distributed at equal intervals, the air guide holes (201) are designed in a conical structure, and the outer surface of the heat sink (501) is penetrated by a plurality of heat dissipation holes (502) distributed at equal intervals.

3. The power amplifier board of the smart speaker according to claim 1, characterized in that: The traction assembly (600) comprises two guide rails (601) respectively fixedly mounted on the two ends of the heat conducting plate (500), and a transverse plate (602) fixedly mounted in the middle of the upper surface of each heat sink (501), the two guide rails (601) being arranged symmetrically with respect to the longitudinal center axis of the heat conducting plate (500), a threaded rod (610) being rotatably mounted inside the guide rail (601), a synchronous pulley (609) being fixedly mounted in the middle of the outer end of the threaded rod (610), and transmission is transmitted between the two synchronous pulleys (609) via a toothed transmission belt (608).

4. The power amplifier board of the smart speaker according to claim 3, characterized in that: A support leg sleeve (607) is slidably provided on the inner surface of the guide rail (601), and a lifting leg (606) is elastically provided inside the support leg sleeve (607) via a return spring (611). A cross bar (604) is provided between the two lifting legs (606), and the two ends of the cross bar (604) are respectively connected to the two lifting legs (606). A roller (603) is rotatably installed on the outer surface of the cross bar (604) and located at each cross plate (602). The support leg sleeve (607) and the threaded rod (610) are arranged by thread engagement, and the outer end of one of the threaded rods (610) is connected and assembled with the output end of the external driving member. A plurality of rounded corner heads (605) distributed at equal intervals are provided on the upper surface of the cross plate (602), and a circular arc surface is used to transition between two adjacent rounded corner heads (605).

5. The power amplifier board of the smart speaker according to claim 1, characterized in that: The heat dissipation mechanism (400) further includes a control unit for turning the motor on and off, the control unit including a motor switch module, a temperature detection module and a logic control module, all of which are mounted on the upper surface of the heat conducting plate (500), the temperature detection module being used to monitor the temperature of the outer surface of the power amplifier board body (100) in real time, the logic control module being used to receive and transmit signals, and the motor switch module, the temperature detection module, the logic control module and the motor being electrically connected.

6. The power amplifier board of the smart speaker according to claim 1, characterized in that: The application assembly (700) comprises a liquid storage box (703), the outer surface of the top of the liquid storage box (703) is provided with a hanging plate (702) for supporting and fixing the liquid storage box (703), the two ends of the hanging plate (702) are respectively connected to the liquid storage box (703) and the cross bar (604), the top of the liquid storage box (703) is provided with a filling port (704) for filling the coolant, and the inner surface of the filling port (704) is slidably inserted with a plug (701).

7. The power amplifier board of the smart speaker according to claim 6, characterized in that: Both ends of the exterior of the liquid storage box (703) are provided with a plurality of transfer tubes (710) that are evenly spaced. The transfer tubes (710) and the liquid storage box (703) are elastically arranged via a compression spring (706). A telescopic tube (705) for conveying coolant is arranged in the middle of one end of the transfer tube (710), and a ball sleeve (707) is arranged in the middle of the other end of the transfer tube (710). The inlet end of the transfer tube (710) and the outlet end of the telescopic tube (705) are connected to each other. The telescopic tube (705) is connected to the transfer tube (710), and the other end of the telescopic tube (705) extends to the interior of the liquid storage box (703). The interior of the transfer tube (710) is provided with a sponge (709) for absorbing the coolant. The interior of the ball sleeve (707) is rotatably installed with a coating ball (708) for smearing the absorbed coolant. The outer surface of the coating ball (708) is in contact with the outer surface of the heat sink (501).

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