Vehicle-mounted power amplifier and vehicle-mounted sound system

Abstract

The utility model relates to the technical field of vehicle-mounted equipment, and provides a vehicle-mounted power amplifier and a vehicle-mounted sound system, the vehicle-mounted power amplifier comprises a bottom plate, a shell, a mainboard, a heat conducting plate and a 3D temperature equalizing plate, the bottom plate is installed in the shell to form an installation space, and the mainboard, the heat conducting plate and the temperature equalizing plate are all fixed in the installation space; the side, away from the bottom plate, of the main board is divided into a first heating area and a second heating area, one side of the 3D uniform-temperature plate makes contact with the first heating area, and the other side of the 3D uniform-temperature plate is connected with the shell. One side of the heat conducting plate is connected with the second heating area, the other side of the heat conducting plate is connected with the shell, and a cooling fan is fixedly installed outside the shell. The heat of the first heating area is conducted and dispersed by the 3D uniform temperature plate and the shell; and the heat of the second heating area is transmitted and dissipated by the radiation effect of the heat conducting plate and the forced convection of the cooling fan. According to the vehicle-mounted power amplifier and the vehicle-mounted sound system provided by the utility model, the heat dissipation effect of the vehicle-mounted power amplifier is improved, and the working performance of the vehicle-mounted sound system is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle-mounted equipment technical field especially, relates to a vehicle-mounted power amplifier and vehicle-mounted sound system. BACKGROUND

[0002] The vehicle-mounted power amplifier is an important component of the vehicle-mounted sound system. As an amplifier, the main function of the vehicle-mounted power amplifier is to improve the power output of the audio signal to drive the loudspeaker in the vehicle-mounted sound system, so that the loudspeaker provides higher quality and larger volume sound output. With the increasing richness of the application of the vehicle-mounted sound system, the power dissipation levels of each component on the mainboard of the vehicle-mounted power amplifier also differ.

[0003] The existing vehicle-mounted power amplifier mostly uses the heat dissipation mode of padding the heat sink on the mainboard. The heat sink radiates to take away part of the heat of the mainboard and conducts part of the heat to the shell to dissipate. This heat dissipation mode cannot effectively dissipate heat according to the power dissipation levels of each component on the mainboard, and the heat dissipation effect is poor, which has been difficult to meet the heat dissipation demand. SUMMARY

[0004] The utility model provides a vehicle-mounted power amplifier and vehicle-mounted sound system to solve the problem that the existing vehicle-mounted power amplifier cannot effectively dissipate heat according to the power dissipation levels of each component on the mainboard, and the heat dissipation effect is poor.

[0005] The utility model provides a vehicle-mounted power amplifier, which comprises a bottom plate, a shell, a mainboard, a heat-conducting plate and a 3D uniform temperature plate. The bottom plate is installed in the shell to form an installation space. The mainboard, the heat-conducting plate and the 3D uniform temperature plate are all fixed in the installation space.

[0006] One side of the mainboard away from the bottom plate is divided into a first heating area and a second heating area. One side of the 3D uniform temperature plate is in contact with the first heating area, and the other side is connected with the shell. One side of the heat-conducting plate is connected with the second heating area, and the other side is connected with the shell. A heat dissipation fan is fixedly installed on the outside of the shell.

[0007] According to the vehicle-mounted power amplifier provided by the utility model, a heat sink is installed on the outer wall of the shell corresponding to the 3D uniform temperature plate. The heat sink is provided with a plurality of heat dissipation fins.

[0008] According to the vehicle-mounted power amplifier provided by the utility model, the 3D uniform temperature plate comprises a plate body and a plurality of heat-conducting pipes vertically connected with the plate body. The plate body is attached to the first heating area, and the plurality of heat-conducting pipes are inserted into the heat sink through the shell.

[0009] The utility model provides a kind of vehicle-mounted power amplifier, the shell is equipped with recess, the radiator is inserted and fixed in the recess, sealing pad is padded between the bottom of the radiator and the groove bottom of the recess, one side of the sealing pad is attached with the groove bottom of the recess;The sealing pad and the groove bottom of the recess are equipped with through-hole corresponding the heat pipe, sealing ring is installed between the heat pipe and the hole wall of the through-hole.

[0010] According to the utility model provides a kind of vehicle-mounted power amplifier, the shell is equipped with mounting groove, the heat dissipation fan is installed in the mounting groove, the shell has several heat dissipation ribs in the area outside the mounting groove;

[0011] And / or, the heat dissipation fan is centrifugal fan.

[0012] According to the utility model provides a kind of vehicle-mounted power amplifier, heat-sensitive element is installed in the installation space, the heat-sensitive element is used to detect the temperature of the mainboard, the heat-sensitive element and the mainboard are electrically connected, and the mainboard and the heat dissipation fan are electrically connected.

[0013] According to the utility model provides a kind of vehicle-mounted power amplifier, further include protective cover, the protective cover is equipped with air inlet, the protective cover is fixed in the shell to form the space of installing the heat dissipation fan between the shell and the protective cover.

[0014] According to the utility model provides a kind of vehicle-mounted power amplifier, the bottom plate is metal plate, the mainboard has copper exposed area towards one side of the bottom plate, the inner wall of the bottom plate is equipped with boss, and the boss and the copper exposed area are in contact.

[0015] According to the utility model provides a kind of vehicle-mounted power amplifier, further include heat isolation piece, and the component of the mainboard in the first heat generating area is isolated from other components on the mainboard by the heat isolation piece.

[0016] The utility model also provides a kind of vehicle-mounted sound system, including host computer, loudspeaker and as any one of the above vehicle-mounted power amplifier, the host computer and the loudspeaker are electrically connected with the mainboard.

[0017] The utility model provides a vehicle-mounted power amplifier and vehicle-mounted sound system, the mainboard, heat conduction plate and uniform temperature plate are all fixed in the mounting space formed by bottom plate and shell, the outside fixed mounting heat dissipation fan of shell, one side of 3D uniform temperature plate is contacted with first heating area, the other side is linked with shell, a part of heat radiated by first heating area is conducted and scattered by 3D uniform temperature plate, another part of heat is transmitted to shell by 3D uniform temperature plate, one side of heat conduction plate is linked with second heating area, the other side is linked with shell, a part of heat radiated by second heating area is transmitted and scattered by the radiative effect of heat conduction plate, another part of heat is transmitted to shell by heat conduction plate, the heat on the shell is accelerated to radiate by forced convection of heat dissipation fan. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the utility model or the prior art, the following will be a simple introduction to the drawings needed to be used in the embodiment or the prior art description, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0019] Figure 1 It is the structure explosion drawing of vehicle-mounted power amplifier provided by the utility model.

[0020] Figure 2 It is the structure schematic view of the one side of mainboard towards 3D uniform temperature plate and heat conduction plate provided by the utility model.

[0021] Figure 3 It is the structure schematic view of the one side of mainboard towards bottom plate provided by the utility model.

[0022] Figure 4 It is the structure schematic view of heat conduction plate provided by the utility model.

[0023] Figure 5 It is the structure schematic view of heat conduction plate provided by the utility model.

[0024] Reference Signs:

[0025] 1, bottom plate; 11, boss; 2, shell; 21, groove; 22, through hole; 23, mounting groove; 24, heat dissipation rib; 3, mainboard; 31, first heat generating area; 32, second heat generating area; 33, copper exposed area; 4, heat conduction plate; 41, fixing column; 42, protruding block; 5, 3D uniform temperature plate; 51, plate body; 52, heat conduction pipe; 6, heat dissipation fan; 7, radiator; 71, heat dissipation fin; 8, sealing gasket; 9, sealing ring; 10, protective cover; 101, air inlet; 20, thermal isolation piece; 30, thermal sensitive element. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] The features of the terms "first", "second" in the specification and claims of the utility model can be explicitly or implicitly included one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specified. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are a kind of "or" relationship.

[0028] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The following is combined with Figures 1-5 Through specific embodiments and application scenarios, this utility model provides a detailed description of a vehicle amplifier and a vehicle audio system.

[0031] like Figures 1 to 5 As shown, this utility model provides a vehicle-mounted amplifier, including: a base plate 1, a housing 2, a main board 3, a heat-conducting plate 4, and a 3D heat spreader 5. The base plate 1 is mounted on the housing 2 to form an installation space. The main board 3, the heat-conducting plate 4, and the 3D heat spreader 5 are all fixed within the installation space.

[0032] The motherboard 3, on the side opposite to the base plate 1, is divided into a first heating area 31 and a second heating area 32. One side of the 3D heat spreader 5 is in contact with the first heating area 31, and the other side is connected to the housing 2. One side of the heat conduction plate 4 is connected to the second heating area 32, and the other side is connected to the housing 2. A cooling fan 6 is fixedly installed on the outside of the housing 2.

[0033] Specifically, the housing 2 is an open box, the main board 3 is fixed to the base plate 1, and the housing 2 covers the base plate 1. The base plate 1 and the housing 2 can be detachably connected or fixedly connected. Optionally, one of the base plate 1 and the housing 2 has a buckle, and the other has a slot, with the buckle engaging with the slot. Alternatively, the base plate 1 and the housing 2 can be connected by screws or other fasteners.

[0034] like Figure 2 As shown, both the first heating area 31 and the second heating area 32 contain several components. During operation, both the first heating area 31 and the second heating area 32 generate heat to varying degrees. During the design phase, based on the power consumption and heat dissipation levels of each component, components that generate more heat are concentrated in the first heating area 31, while components that generate less heat are concentrated in the second heating area 32, in order to achieve precise control over the heat dissipation of the motherboard 3.

[0035] The 3D temperature equalizing plate 5 and the whole plate surface of the first heat generating area 31 are in contact and connected with the shell 2 to uniformly conduct and disperse the heat of the first heat generating area 31, reduce the temperature difference, ensure the temperature uniformity of the first heat generating area 31, effectively avoid local overheating, and improve the heat dissipation efficiency and thermal stability of the main board 3. Among them, the 3D temperature equalizing plate 5 is a 3DVC temperature equalizing plate. The 3DVC temperature equalizing plate uses steam chamber technology to take away part of the heat of the first heat generating area 31, and the other part of the heat is transmitted to the shell 2 through the 3DVC temperature equalizing plate. The heat of the shell 2 is accelerated to be discharged by forced convection of the cooling fan 6.

[0036] As shown in Figure 1 , Figure 4 and Figure 5 , the heat conducting plate 4 is provided with a plurality of fixing columns 41 at intervals. The second heat generating area 32 of the main board 3 is provided with a plurality of fixing holes corresponding to the fixing columns 41. The fixing columns 41 are inserted into the fixing holes one by one to realize the fixed connection of the heat conducting plate 4 and the main board 3. Optionally, the number of fixing columns 41 can be two, three, five or six, etc., which is not limited here.

[0037] As shown in Figure 1 , Figure 4 and Figure 5 , the side of the heat conducting plate 4 facing the second heat generating area 32 is provided with a protrusion 42. The protrusion 42 is in abutment with the second heat generating area 32 to conduct the heat of the second heat generating area 32 to the heat conducting plate 4 through the protrusion 42. The side of the heat conducting plate 4 away from the second heat generating area 32 is in abutment with or fixed by screws to the shell 2. The cooling fan 6 is installed on the top wall of the shell 2 corresponding to the area of the heat conducting plate 4. Part of the heat emitted by the second heat generating area 32 is transmitted and dispersed by the radiation of the heat conducting plate 4, and the other part of the heat is transmitted to the shell 2 by the heat conducting plate 4 and accelerated to be discharged by forced convection of the cooling fan 6, thereby improving the heat dissipation capacity of the main board 3 and ensuring the working performance of the main board 3.

[0038] Optionally, a plurality of protrusions 42 can be provided to improve the heat conduction efficiency of the heat conducting plate 4 to the second heat generating area 32. The number of protrusions 42 can be two or three, etc., which is not limited here.

[0039] Optionally, the heat conducting plate 4 is an aluminum heat conducting plate. Compared with the traditional copper heat conducting plate, the aluminum heat conducting plate can reduce the weight of the whole vehicle-mounted power amplifier and has lower cost.

[0040] The utility model provides a vehicle-mounted power amplifier, the mainboard 3, the heat conduction plate 4 and 3D uniform temperature plate 5 are all fixed in the mounting space formed by bottom plate 1 and shell 2, the outside fixed mounting heat dissipation fan 6 of shell 2, one side of 3D uniform temperature plate 5 is contacted with first heating area 31, the other side is connected with shell 2, and a part of heat radiated by first heating area 31 is conducted and scattered by 3D uniform temperature plate 5, and another part of heat is transmitted to shell 2 by 3D uniform temperature plate 5, one side of heat conduction plate 4 is connected with second heating area 32, and the other side is connected with shell 2, and a part of heat radiated by second heating area 32 is transmitted and scattered by the radiative action of heat conduction plate 4, and another part of heat is transmitted to shell 2 by heat conduction plate 4, and the heat of shell 2 is accelerated to radiate by the forced convection of heat dissipation fan 6.The vehicle-mounted power amplifier provided by the utility model can effectively radiate the mainboard 3 according to the power consumption radiating level of each component on the mainboard 3, improves the radiating effect of the vehicle-mounted power amplifier, and guarantees the working performance of the mainboard 3.

[0041] Further, in some embodiments, as shown in Figure 1 The outer wall of shell 2 is provided with a radiator 7 corresponding to 3D uniform temperature plate 5. The radiator 7 is provided with a plurality of heat dissipation fins 71, which improve the contact area of the radiator 7 with air and improve the heat dissipation effect. Optionally, the radiator 7 is an aluminum radiator.

[0042] The radiator 7 and the 3D uniform temperature plate 5 are correspondingly arranged, the shell 2 receives the heat conducted by the 3D uniform temperature plate 5 and transmits it to the radiator 7, and the heat received by the radiator 7 is transmitted and scattered to the outside through the radiative action of the heat dissipation fins 71.

[0043] As shown in Figure 1 The 3D uniform temperature plate 5 includes a plate body 51 and a plurality of heat conduction pipes 52 connected perpendicularly to the plate body 51. The plate body 51 is attached to the first heating area 31. The plurality of heat conduction pipes 52 are inserted into the radiator 7 through the shell 2.

[0044] In this embodiment, the 3D uniform temperature plate 5 is a 3DVC uniform temperature plate. Specifically, the plate body 51 has a heat source cavity and a cooling cavity, and the heat source cavity contains working liquid. The plate body 51 is attached to the first heating area 31 so that the working liquid absorbs the heat of the first heating area 31 and then evaporates into gas, which is then transmitted to the cooling cavity through the microchannels in the plate body 51. In the cooling cavity, the gas condenses into liquid and returns to the heat source cavity, thus circulating and efficiently conducting the heat of the first heating area 31 uniformly. The plurality of heat conduction pipes 52 are perpendicular to the plate body 51 and conduct the heat of the first heating area 31 in three dimensions. Each heat conduction pipe 52 passes through the shell 2 and is inserted into the radiator 7, which carries away the remaining heat.

[0045] As shown in Figure 1As shown, the shell 2 is provided with a recess 21, and the heat sink 7 is inserted and fixed in the recess 21. A sealing gasket 8 is arranged between the bottom of the heat sink 7 and the bottom of the recess 21. One side of the sealing gasket 8 is attached to the bottom of the recess 21. The sealing gasket 8 and the bottom of the recess 21 are provided with through holes 22 corresponding to the heat pipes 52. A sealing ring 9 is arranged between the heat pipes 52 and the hole walls of the through holes 22.

[0046] Specifically, the heat sink 7 can be locked in the recess 21 by bolts. The bottom of the recess 21 and the sealing gasket 8 are provided with a plurality of through holes 22. The plurality of heat pipes 52 are arranged in the plurality of through holes 22 of the shell 2 and the sealing gasket 8 one by one and are inserted into the heat sink 7. The sealing gasket 8 is arranged between the heat sink 7 and the bottom of the recess 21 to block the gap between the heat sink 7 and the bottom of the recess 21, and the gap between the hole wall of each through hole 22 and the heat pipe 52 is blocked by the sealing ring 9 to prevent water from leaking into the shell 2, thereby ensuring the waterproof performance of the entire vehicle-mounted power amplifier.

[0047] Optionally, the sealing gasket 8 is an asbestos gasket or a silicone rubber gasket, and the sealing ring 9 is an O-ring.

[0048] In some embodiments, as shown, Figure 1 The shell 2 is provided with a mounting groove 23. The heat dissipation fan 6 is mounted in the mounting groove 23. Specifically, the top wall of the shell 2 is inwardly recessed corresponding to the area of the heat dissipation plate 4 to form the mounting groove 23. Optionally, the bottom of the mounting groove 23 is provided with a plurality of positioning columns corresponding to the outer edge of the heat dissipation fan 6. The heat dissipation fan 6 is inserted into the plurality of positioning columns and then is fixed in the mounting groove 23 by means of bolts or other fasteners.

[0049] The shell 2 is provided with a plurality of heat dissipation ribs 24 in the area outside the mounting groove 23. The heat dissipation ribs 24 can increase the contact area of the shell 2 with air and improve the heat dissipation effect. Optionally, the heat dissipation ribs 24 are upright plates. Alternatively, the heat dissipation ribs 24 are in a bent shape. The plurality of heat dissipation ribs 24 are arranged in the area of the top wall of the shell 2 corresponding to the heat dissipation plate 4. Alternatively, the side wall of the shell 2 close to the heat dissipation plate 4 can also be provided with heat dissipation ribs 24. Of course, in some embodiments, the area of the shell 2 provided with the mounting groove 23 can also be provided with heat dissipation ribs 24.

[0050] The heat of the second heat generating area 32 is transmitted to the plurality of heat dissipation ribs 24 through the heat dissipation plate 4. Part of the heat is transmitted and dissipated by the radiation of the heat dissipation ribs 24, and the other part of the heat is accelerated to dissipate through the forced convection of the heat dissipation fan 6, thereby improving the heat dissipation capacity of the main board 3 and ensuring the working performance of the main board 3.

[0051] Optionally, the heat dissipation fan 6 is a centrifugal fan. Compared with the traditional heat dissipation by using an axial flow fan, the centrifugal fan has a large air volume and low noise, which not only improves the heat dissipation effect but also better ensures the playing sound effect of the loudspeaker.

[0052] Further, in some embodiments, a thermal sensitive element 30 is installed in the installation space. The thermal sensitive element 30 is used to detect the temperature of the main board 3. The thermal sensitive element 30 is electrically connected with the main board 3, and the main board 3 is electrically connected with the heat dissipation fan 6.

[0053] Specifically, the resistance value of the thermal sensitive element 30 can change according to the change of the temperature of the main board 3. Optionally, the thermal sensitive element 30 is a thermistor or a resistance temperature detector. The main board 3 judges whether the current temperature is within the preset temperature range based on the resistance value of the thermal sensitive element 30. When the temperature of the main board 3 is higher than the preset temperature range, the main board 3 controls the heat dissipation fan 6 to speed up the wind speed to accelerate the heat dissipation of the main board 3; when the temperature of the main board 3 is within the preset temperature range, the main board 3 controls the heat dissipation fan 6 to keep the current wind speed running. For example, in cold weather, when the temperature of the main board 3 is lower than the preset temperature range, it indicates that the radiation heat dissipation mode of the heat conduction plate 4 and the shell 2 can meet the heat dissipation demand of the main board 3, and the main board 3 controls the heat dissipation fan 6 to be closed to save electricity.

[0054] As shown in FIG. 1, in some embodiments, the vehicle-mounted power amplifier further comprises a protective cover 10. The protective cover 10 is fixed to the shell 2 to form a space for installing the heat dissipation fan 6 between the shell 2 and the protective cover 10, which can not only prevent the heat dissipation fan 6 from falling out of the installation groove 23, but also can shield the heat dissipation fan 6 to improve the aesthetic appearance. Figure 1

[0055] Among them, the cross section of the protective cover 10 is larger than the cross section of the heat dissipation fan 6, so as to completely shield the heat dissipation fan 6 by means of the protective cover 10. Optionally, the protective cover 10 is provided with fastening holes, and the shell 2 is provided with screw holes. A fixing member such as a screw is threaded through the fastening holes and the screw holes to be screwed to fix the protective cover 10 on the shell 2. Among them, the fastening holes, the screw holes and the fixing member all have multiple, so as to ensure the stability of the connection between the protective cover 10 and the shell 2.

[0056] The protective cover 10 is provided with an air inlet 101. When the heat dissipation fan 6 is running, the external cold air flows into the installation groove 23 through the air inlet 101, the heat generated by the second heat generating area 32 of the main board 3 is transmitted to the shell 2 through the heat conduction plate 4, and exchanges heat with the external cold air under the action of the heat dissipation fan 6 to improve the heat dissipation speed.

[0057] Further, in some embodiments, the bottom plate 1 is a metal plate. As shown in FIG. 1, the side of the main board 3 facing the bottom plate 1 has a copper exposed area 33. Correspondingly, as shown in FIG. 1, the inner wall of the bottom plate 1 is provided with a boss 11. The boss 11 and the copper exposed area 33 are in contact. Figure 3 Figure 1

[0058] ​​​Specifically, a copper sheet is fixed on the side of the main board 3 away from the heat-conducting plate 4 and the 3D vapor chamber 5, so as to form a copper-exposed area 33 at the copper sheet. The bottom plate 1 can be a metal plate with excellent heat-conducting performance, such as an aluminum plate, a copper plate, or an aluminum alloy plate. The boss 11 is protruded on the inner wall of the bottom plate 1, and when the main board 3 is fixed in the mounting space, the boss 11 abuts against the copper-exposed area 33, so that the main board 3 transmits heat to the bottom plate 1, and the bottom plate 1 carries the heat out to the outside, thereby improving the heat dissipation efficiency of the main board 3.

[0059] Optionally, as shown in Figure 1 and Figure 3 , in order to further improve the heat dissipation effect of the main board 3, a plurality of copper-exposed areas 33 can be arranged at intervals on the side of the main board 3 away from the heat-conducting plate 4 and the 3D vapor chamber 5. The copper-exposed areas 33 can be arranged in the area where the heat of the main board 3 is more concentrated. The inner wall of the bottom plate 1 is provided with a plurality of bosses 11. The plurality of bosses 11 and the plurality of copper-exposed areas 33 abut one by one, thereby accelerating the rate of heat transmission from the main board 3 to the bottom plate 1 and ensuring the heat dissipation effect of the main board 3. Optionally, the number of copper-exposed areas 33 and bosses 11 can be two, three, five, or six, and the like, which is not limited in particular.

[0060] In some embodiments, as shown in Figure 1 , the vehicle-mounted power amplifier further comprises a thermal isolation piece 20. The components of the main board 3 in the first heat-generating area 31 are thermally isolated from other components on the main board 3 by the thermal isolation piece 20.

[0061] Optionally, the thermal isolation piece 20 is glass fiber, silica gel, or a thermal isolation tape. The thermal isolation piece 20 is used to wrap all components of the first heat-generating area 31 or some components that generate more heat, so as to prevent the heat of the first heat-generating area 31 from being transmitted to other components on the main board 3, thereby improving the overall heat dissipation efficiency of the main board 3.

[0062] The utility model also provides a vehicle-mounted sound system, including host computer, loudspeaker and like above described vehicle-mounted power amplifier. Host computer and loudspeaker all with main board 3 electricity is connected.

[0063] Among them, the host computer integrates functions such as radio, CD player and DVD player, and is used for receiving signals, controlling volume, adjusting sound quality, selecting a playing source and displaying information, and the like. The host computer is connected to the vehicle-mounted power amplifier and the loudspeaker through an audio output interface. The main board 3 receives the low-power audio signal sent by the host computer, amplifies the power of the low-power audio signal, and drives the loudspeaker to work. The loudspeaker converts the amplified audio signal into sound, so that the user can hear the audio content.

[0064] Since the vehicle-mounted audio system comprises the vehicle-mounted power amplifier, the specific structure of the vehicle-mounted power amplifier refers to the above-mentioned embodiments, the vehicle-mounted audio system of the present embodiment comprises all the technical solutions of the above-mentioned embodiments, and therefore at least has all the beneficial effects obtained by all the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0065] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A vehicle-mounted power amplifier, characterized by comprising: The application relates to a vehicle-mounted power amplifier, which comprises a bottom plate, a shell, a main plate, a heat-conducting plate and a 3D uniform temperature plate. The side of the main plate, which is away from the bottom plate, is divided into a first heat-emitting area and a second heat-emitting area; one side of the 3D uniform temperature plate is in contact with the first heat-emitting area, and the other side is connected with the shell; one side of the heat-conducting plate is connected with the second heat-emitting area, and the other side is connected with the shell; and a heat-dissipating fan is fixedly installed outside the shell. The outer wall of the shell is provided with a heat radiator corresponding to the 3D uniform temperature plate.

2. The vehicle-mounted power amplifier according to claim 1, characterized by, The 3D uniform temperature plate comprises a plate body and a plurality of heat-conducting pipes which are vertically connected with the plate body respectively; the plate body is attached to the first heat-emitting area; and the plurality of heat-conducting pipes are inserted into the heat radiator through the shell.

3. The vehicle-mounted power amplifier according to claim 2, characterized by, The shell is provided with a groove, the heat radiator is inserted and fixed in the groove, a sealing gasket is arranged between the bottom of the heat radiator and the groove bottom, one side of the sealing gasket is attached to the groove bottom, the sealing gasket and the groove bottom are provided with through holes corresponding to the heat-conducting pipes, and a sealing ring is arranged between the heat-conducting pipes and the hole walls of the through holes.

4. The vehicle-mounted power amplifier according to claim 3, characterized by, The shell is provided with an installation groove, the heat-dissipating fan is installed in the installation groove, and the shell is provided with a plurality of heat-dissipating ribs outside the installation groove.

5. The vehicle-mounted power amplifier according to claim 1, characterized by, The heat-dissipating fan is a centrifugal fan. A heat-sensitive element is installed in the installation space, the heat-sensitive element is used for detecting the temperature of the main plate, the heat-sensitive element is electrically connected with the main plate, and the main plate is electrically connected with the heat-dissipating fan.

6. The vehicle-mounted power amplifier according to claim 1 or 5, characterized by, The application further comprises a protective cover which is provided with an air inlet, the protective cover is fixed to the shell to form a space for installing the heat-dissipating fan between the shell and the protective cover.

7. The vehicle-mounted power amplifier according to claim 1, characterized by, The bottom plate is a metal plate, the side of the main plate, which is towards the bottom plate, is provided with a copper-exposed area, the inner wall of the bottom plate is provided with a boss, and the boss is in contact with the copper-exposed area.

8. The vehicle-mounted power amplifier according to claim 1, characterized by, The application further comprises a heat isolation piece, the components in the first heat-emitting area of the main plate are heat-isolated from other components on the main plate through the heat isolation piece.

9. The vehicle-mounted power amplifier according to claim 1, characterized by, The application further comprises a main machine and a loudspeaker, both of which are electrically connected with the main plate.

10. A car audio system, characterized by comprising: ​

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