Power amplifier

Abstract

The utility model relates to a power amplifier, and belongs to the field of detection equipment, the power amplifier comprises a hollow shell, the bottom end of the shell is provided with a supporting structure, and the bottom end of the shell is suspended through the supporting structure; a heat dissipation air outlet is formed in the top wall of the shell, a first sealing door is arranged on the inner side of the top wall of the shell, the first sealing door is slidably connected to the top wall of the shell, and when the first sealing door moves to be opposite to the heat dissipation air outlet, the first sealing door seals the heat dissipation air outlet; a heat dissipation air inlet is formed in the bottom wall of the shell, a second sealing door is arranged in the bottom wall of the shell, the second sealing door is slidably connected to the bottom wall of the shell, and when the second sealing door moves to be opposite to the heat dissipation air inlet, the second sealing door seals the heat dissipation air inlet; and an opening and closing mechanism for simultaneously controlling the first sealing door and the second sealing door to move is arranged in the shell. The power amplifier has the effect that the interior of the power amplifier can be rapidly cooled when the temperature in the power amplifier exceeds the safe temperature.

Description

Technical Field

[0001] The present application relates to the field of detection equipment, and in particular to a power amplifier. Background Art

[0002] A power amplifier is an amplifier that can generate maximum power output to drive a load (such as a speaker) under given distortion conditions. The power amplifier has a wide frequency response range, low output waveform distortion, low impedance and high impedance output modes, output voltage and current indication, adjustable 1A to 38A output current limit function, and can be used as a high-power excitation source for vibration testing in conjunction with a modal exciter.

[0003] When the power amplifier is working continuously and efficiently, a large amount of heat will be generated inside the power amplifier. When the temperature inside the power amplifier exceeds the safe temperature, the internal components of the power amplifier will be in a high temperature environment for a long time. When the internal components are in a high temperature environment for a long time, the internal components are prone to burn out, thus affecting the normal use of the power amplifier. Utility Model Content

[0004] In order to quickly cool down the inside of a power amplifier when the internal temperature of the power amplifier exceeds a safe temperature, the present application provides a power amplifier.

[0005] The power amplifier provided in this application adopts the following technical solution:

[0006] A power amplifier comprises a shell with a hollow interior, wherein a support structure is arranged at the bottom end of the shell, and the bottom end of the shell is suspended in the air by the support structure;

[0007] A heat dissipation outlet is provided on the top wall of the shell, and a first closed door is provided on the inner side of the top wall of the shell. The first closed door is slidably connected to the top wall of the shell, and when the first closed door moves to face the heat dissipation outlet, the first closed door closes the heat dissipation outlet;

[0008] A heat dissipation air inlet is provided on the bottom wall of the shell, and a second closed door is provided inside the bottom wall of the shell. The second closed door is slidably connected to the bottom wall of the shell, and when the second closed door moves to face the heat dissipation air inlet, the second closed door closes the heat dissipation air inlet;

[0009] An opening and closing mechanism for simultaneously controlling the movement of the first closed door and the second closed door is arranged inside the shell.

[0010] By adopting the above technical solution, when the temperature inside the shell exceeds the safe temperature, the opening and closing mechanism simultaneously controls the first closed door and the second closed door to move, so that the first closed door and the heat dissipation outlet are in a misaligned state, and the second closed door and the heat dissipation air inlet are in a misaligned state. At this time, the heat dissipation air inlet and the heat dissipation air outlet are both in an open state, and the hot air inside the shell can be quickly discharged through the heat dissipation outlet, and the outside air can be quickly replenished into the interior of the shell through the heat dissipation air inlet, thereby achieving the purpose of quickly reducing the temperature inside the shell.

[0011] Optionally, the opening and closing mechanism includes a first guide tube and a second guide tube fixed inside the shell;

[0012] A first chain is slidably connected in the first guide tube, the first chain is fixed to the first closed door, and when the first chain moves in the first guide tube, the first closed door moves;

[0013] A second chain is slidably connected in the second guide tube, and the second chain is fixed to the second closed door. When the second chain moves in the second guide tube, the second closed door moves;

[0014] A driving assembly is disposed between the first guide tube and the second guide tube, and the driving assembly is engaged with both the first chain and the second chain to simultaneously drive the first chain and the second chain to move.

[0015] By adopting the above technical solution, the driving component is started to move the first chain inside the first guide tube and the second chain inside the second guide tube, so that the first chain pulls the first closed door to move and the second chain pulls the second closed door to move, thereby realizing the simultaneous opening of the heat dissipation outlet and the heat dissipation inlet.

[0016] Optionally, the drive assembly includes a drive shaft rotatably connected to the inside of the shell and a drive motor for driving the drive shaft to rotate, and a first sprocket and a second sprocket are fixed on the drive shaft, the first sprocket is meshed with the first chain, and the second sprocket is meshed with the second chain.

[0017] By adopting the above technical solution, the first sprocket is meshed with the first chain, and the second sprocket is meshed with the second chain, which has the advantage of stable transmission and ensures that the first chain can move stably.

[0018] Optionally, the drive motor is located outside the shell.

[0019] By adopting the above technical solution, the drive motor is installed on the outside of the shell, so that the heat generated by the drive motor during the startup process can be directly discharged to the outside of the shell without occupying the internal space of the shell.

[0020] Optionally, the supporting structure includes first legs located at two corners of the front end of the shell and second legs located at two ends of the rear end of the shell, and the length of the first leg is longer than that of the second leg.

[0021] By adopting the above technical solution, the shell is placed on the desktop in an inclined state, so that it is convenient for the staff to operate on the front end surface of the shell.

[0022] Optionally, heat dissipation holes are provided on the side walls of the shell.

[0023] By adopting the above technical solution, when the temperature inside the shell does not exceed the safe temperature, heat can be dissipated only through the heat dissipation holes.

[0024] Optionally, dustproof nets are provided at the heat dissipation air outlet and the heat dissipation air inlet.

[0025] By adopting the above technical solution, the dustproof net can prevent dust on the outside of the shell from entering the inside of the shell.

[0026] Optionally, a cooling fan is installed at the cooling air inlet, and the cooling fan blows air into the interior of the shell.

[0027] By adopting the above technical solution, the cooling fan can speed up the flow rate of air entering the shell, so that the air can quickly flow through the inside of the shell, thereby quickly taking away the heat inside the shell and accelerating the speed at which the temperature inside the shell drops.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] 1. When the temperature inside the shell exceeds the safe temperature, the opening and closing mechanism simultaneously controls the first closed door and the second closed door to move, so that the first closed door and the heat dissipation outlet are in a misaligned state, and the second closed door and the heat dissipation inlet are in a misaligned state. At this time, the heat dissipation inlet and the heat dissipation outlet are both in an open state, and the hot air inside the shell can be quickly discharged through the heat dissipation outlet, and the outside air can be quickly replenished into the shell through the heat dissipation inlet, so as to achieve the purpose of quickly reducing the temperature inside the shell;

[0030] 2. The cooling fan can speed up the flow rate of air entering the shell, so that the air can quickly flow through the inside of the shell, thereby quickly taking away the heat inside the shell and accelerating the speed at which the temperature inside the shell drops. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the three-dimensional structure of a power amplifier according to an embodiment of the present application;

[0032] Figure 2 is an overall longitudinal cross-sectional view of a power amplifier according to an embodiment of the present application;

[0033] Figure 3 is a schematic structural diagram of the internal structure of a housing of a power amplifier according to an embodiment of the present application;

[0034] Figure 4 is a schematic diagram of the connection structure between the opening and closing mechanism and the first closed door and the second closed door in an embodiment of the present application;

[0035] Figure 5 is a schematic diagram of the connection structure between the drive assembly and the first closed door in an embodiment of the present application;

[0036] Figure 6 yes Figure 5 A partial enlarged view of the middle A area;

[0037] Figure 7 is a schematic diagram of the connection structure between the drive assembly and the second closed door in an embodiment of the present application;

[0038] Figure 8 yes Figure 7 A partial enlarged view of the B area;

[0039] Fig. 9 is a schematic diagram of the internal structure of a housing of a power amplifier in an embodiment of the present application, with the heat dissipation air outlet and the heat dissipation air inlet in an open state;

[0040] Fig.10 It is a partial cross-sectional view of the heat dissipation outlet and the heat dissipation inlet of the shell of the embodiment of the present application.

[0041] Explanation of the reference numerals in the accompanying drawings: 1. shell; 11. first leg; 12. second leg; 13. heat dissipation outlet; 14. heat dissipation inlet; 15. heat dissipation hole; 2. first closed door; 3. second closed door; 4. heat dissipation fan; 5. opening and closing mechanism; 51. first guide pipe; 511. first vertical section; 512. first horizontal section; 5121. first connecting groove; 513. first arc-shaped connecting section; 52. second guide pipe; 521. second vertical section; 522. second horizontal section; 5221. second connecting groove; 523. second arc-shaped connecting section; 53. first chain; 54. second chain; 55. drive assembly; 551. drive shaft; 552. first sprocket; 553. second sprocket; 554. drive motor; 6. dustproof net. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-10 This application is described in further detail.

[0043] The embodiment of the present application discloses a power amplifier.

[0044] Reference Figure 1 The power amplifier includes a shell 1 with a hollow interior. The shape of the shell 1 in this embodiment is a rectangular structure. At the four corners of the bottom end of the shell 1, the two corners located at the front end are fixed with first legs 11, and the two corners located at the rear end are fixed with second legs 12. The shell 1 is in a suspended state supported by the first leg 11 and the second leg 12. The length of the first leg 11 is longer than that of the second leg 12, so that when the shell 1 is placed on the desktop, the shell 1 can be in a tilted state. By making the shell 1 in a tilted state, the front end section of the shell 1 is facing obliquely upward, which is convenient for the operator to operate the connection.

[0045] Reference Figure 2 A heat dissipation air outlet 13 is provided on the top wall of the shell 1, and the heat dissipation air outlet 13 is located in the middle position of the top wall of the shell 1. The heat dissipation air outlet 13 connects the internal space of the shell 1 with the external space of the shell 1. A first closed door 2 is provided on the inner side of the top wall of the shell 1, and the first closed door 2 can close the heat dissipation air outlet 13. The first closed door 2 is slidably connected to the top wall of the shell 1, and the heat dissipation air outlet 13 is located on the moving path of the first closed door 2. When the first closed door 2 moves to a state opposite to the heat dissipation air outlet 13, the first closed door 2 closes the heat dissipation air outlet 13. When the first closed door 2 moves to a state of misalignment with the heat dissipation air outlet 13, the heat dissipation air outlet 13 is in an open state.

[0046] A heat dissipation air inlet 14 is provided on the bottom wall of the shell 1, and the heat dissipation air inlet 14 is located in the middle position of the bottom wall of the shell 1. The heat dissipation air inlet 14 connects the internal space of the shell 1 with the external space of the shell 1. A second closed door 3 is provided on the inner side of the bottom wall of the shell 1, and the second closed door 3 can close the heat dissipation air inlet 14. The second closed door 3 is slidably connected to the bottom wall of the shell 1, and the heat dissipation air inlet 14 is located on the moving path of the second closed door 3. When the second closed door 3 moves to a state opposite to the heat dissipation air inlet 14, the second closed door 3 closes the heat dissipation air inlet 14. When the second closed door 3 moves to a state misaligned with the heat dissipation air inlet 14, the heat dissipation air inlet 14 is in an open state.

[0047] A cooling fan 4 is installed inside the heat dissipation air inlet 14, and the cooling fan 4 blows air toward the internal environment of the shell 1. The air blown into the shell 1 is discharged through the heat dissipation air outlet 13 after passing through the inside of the shell 1. When the air passes through the inside of the shell 1, the heat inside the shell 1 is also taken out, thereby accelerating the reduction of the temperature inside the shell 1.

[0048] Reference Figure 2 , Figure 3An opening and closing mechanism 5 for simultaneously controlling the movement of the first closed door 2 and the second closed door 3 is installed inside the housing 1. Figure 3 , Figure 4 The opening and closing mechanism 5 includes a first guide tube 51 and a second guide tube 52 fixed inside the shell 1. The first guide tube 51 includes a first vertical section 511 arranged vertically, a first horizontal section 512 located above the first vertical section 511 and arranged horizontally, and a first arc-shaped connecting section 513 connecting the first vertical section 511 and the first horizontal section 512. The first vertical section 511, the first arc-shaped connecting section 513 and the first horizontal section 512 are integrally formed. The length direction of the first horizontal section 512 is arranged along the moving direction of the first closed door 2. The first horizontal section 512 is fixed to the inner side of the top wall of the shell 1.

[0049] Reference Figure 4 , Figure 5 as well as Figure 6 A first chain 53 is arranged inside the first guide tube 51, and the first chain 53 is slidably connected inside the first guide tube 51. The first chain 53 abuts against the tube wall of the first guide tube 51. The first horizontal section 512 of the first chain 53 is opposite to the heat dissipation outlet 13. A first connecting groove 5121 is provided on the tube wall of the first horizontal section 512 on one side facing the top wall of the housing 1, and the length direction of the first connecting groove 5121 is arranged along the length direction of the first horizontal section 512. The first closed door 2 is fixed to the first chain 53 through the first connecting groove 5121.

[0050] When the first chain 53 moves inside the first guide tube 51 , the first chain 53 synchronously pulls the first closed door 2 to move, thereby controlling the relative position between the first closed door 2 and the heat dissipation outlet 13 .

[0051] Reference Figure 4 , Figure 7 as well as Figure 8 The second guide tube 52 includes a second vertical section 521 which is vertically arranged, a second horizontal section 522 which is located above the second vertical section 521 and is horizontally arranged, and a second arc-shaped connecting section 523 which connects the second vertical section 521 and the second horizontal section 522. The second vertical section 521, the second arc-shaped connecting section 523 and the second horizontal section 522 are integrally formed. The length direction of the second horizontal section 522 is arranged along the moving direction of the second closed door 3. The second horizontal section 522 is fixed to the inner side of the top wall of the housing 1.

[0052] A second chain 54 is provided inside the second guide tube 52, and the second chain 54 is slidably connected inside the second guide tube 52. The second chain 54 abuts against the tube wall of the second guide tube 52. The second horizontal section 522 of the second chain 54 is opposite to the heat dissipation air inlet 14. A second connecting groove 5221 is provided on the tube wall of the second horizontal section 522 facing the top wall of the housing 1, and the length direction of the second connecting groove 5221 is arranged along the length direction of the second horizontal section 522. The second closed door 3 is fixed to the second chain 54 through the second connecting groove 5221.

[0053] When the second chain 54 moves inside the second guide tube 52 , the second chain 54 synchronously pulls the second closed door 3 to move, thereby controlling the relative position between the second closed door 3 and the heat dissipation air inlet 14 .

[0054] Reference Figure 3 , Figure 4 as well as Fig. 9 A driving assembly 55 is provided between the first guide tube 51 and the second guide tube 52. The driving assembly 55 includes a driving shaft 551 rotatably connected inside the housing 1. A first sprocket 552 and a second sprocket 553 are coaxially fixed to the driving shaft 551. The first sprocket 552 is opposite to the first vertical section 511 of the first guide tube 51, and the second sprocket 553 is opposite to the second vertical section 521 of the second guide tube 52. The first sprocket 552 penetrates the tube wall at the first vertical section 511 and meshes with the first chain 53. The second sprocket 553 penetrates the tube wall at the second vertical section 521 and meshes with the second chain 54.

[0055] One end of the drive shaft 551 penetrates the side wall of the housing 1 and extends to the outside of the housing 1. A drive motor 554 is fixed to the end of the drive shaft 551 extending to the outside of the housing 1, and the drive motor 554 is fixed to the housing 1. The motor shaft of the drive motor 554 is coaxially opposite to the drive shaft 551 and fixed together. When the drive motor 554 is started, the motor shaft of the drive motor 554 can drive the drive shaft 551 to rotate.

[0056] Reference Fig.10 In order to reduce dust from entering the interior of the housing 1 , dustproof nets 6 are fixed at the heat dissipation air outlet 13 and the heat dissipation air inlet 14 .

[0057] Reference Fig.10 , a heat dissipation hole 15 is provided on the side wall of the housing 1. When the temperature inside the housing 1 is lower than the safe temperature, heat can be dissipated only through the heat dissipation hole 15. When the temperature inside the housing 1 is higher than the safe temperature, the heat dissipation fan 4 and the heat dissipation air inlet 14 and the heat dissipation air outlet 13 are turned on to accelerate the flow of air inside the housing 1 and achieve rapid cooling.

[0058] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A power amplifier, comprising a housing (1) having a hollow interior, characterized in that: The bottom end of the shell (1) is provided with a supporting structure, and the bottom end of the shell (1) is suspended in the air by means of the supporting structure; A heat dissipation outlet (13) is provided on the top wall of the shell (1), and a first closed door (2) is provided on the inner side of the top wall of the shell (1). The first closed door (2) is slidably connected to the top wall of the shell (1), and when the first closed door (2) moves to face the heat dissipation outlet (13), the first closed door (2) closes the heat dissipation outlet (13); A heat dissipation air inlet (14) is provided on the bottom wall of the shell (1), a second closed door (3) is provided inside the bottom wall of the shell (1), the second closed door (3) is slidably connected to the bottom wall of the shell (1), and when the second closed door (3) moves to face the heat dissipation air inlet (14), the second closed door (3) closes the heat dissipation air inlet (14); An opening and closing mechanism (5) for simultaneously controlling the movement of the first closed door (2) and the second closed door (3) is arranged inside the housing (1).

2. A power amplifier according to claim 1, characterized in that: The opening and closing mechanism (5) comprises a first guide tube (51) and a second guide tube (52) fixed inside the housing (1); A first chain (53) is slidably connected inside the first guide tube (51), the first chain (53) is fixed to the first closed door (2), and when the first chain (53) moves inside the first guide tube (51), the first closed door (2) moves; A second chain (54) is slidably connected in the second guide tube (52), the second chain (54) is fixed to the second closed door (3), and when the second chain (54) moves in the second guide tube (52), the second closed door (3) moves; A driving assembly (55) is provided between the first guide tube (51) and the second guide tube (52), and the driving assembly (55) is meshed with both the first chain (53) and the second chain (54) so ​​as to simultaneously drive the first chain (53) and the second chain (54) to move.

3. A power amplifier according to claim 2, characterized in that: The driving assembly (55) comprises a driving shaft (551) rotatably connected to the inside of the housing (1) and a driving motor (554) for driving the driving shaft (551) to rotate. A first sprocket (552) and a second sprocket (553) are fixed to the driving shaft (551). The first sprocket (552) is meshed with the first chain (53), and the second sprocket (553) is meshed with the second chain (54).

4. A power amplifier according to claim 3, characterized in that: The driving motor (554) is located outside the housing (1).

5. A power amplifier according to claim 1, characterized in that: The supporting structure comprises a first support leg (11) located at two corners of the front end of the shell (1) and a second support leg (12) located at two ends of the rear end of the shell (1), and the length of the first support leg (11) is longer than the length of the second support leg (12).

6. A power amplifier according to claim 1, characterized in that: A heat dissipation hole (15) is provided on the side wall of the housing (1).

7. A power amplifier according to claim 1, characterized in that: The heat dissipation air outlet (13) and the heat dissipation air inlet (14) are both provided with dustproof nets (6).

8. A power amplifier according to claim 1, characterized in that: A cooling fan (4) is installed at the cooling air inlet (14), and the cooling fan (4) blows air into the interior of the housing (1).

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