Power amplifier with noise reduction function

Abstract

The utility model discloses a power amplifier with a noise reduction function. The power amplifier comprises a shell, sound insulation cotton, a semiconductor chilling plate, a first heat dissipation fin and a second heat dissipation fin. According to the power amplifier with the noise reduction function, a power amplifier body comprises a shell, sound insulation cotton is fixedly pasted to the inner side of the shell, first heat dissipation fins are fixedly installed on the back face of the shell, and second heat dissipation fins corresponding to the first heat dissipation fins are arranged on the outer sides of the first heat dissipation fins; a semiconductor chilling plate is clamped between the second heat dissipation fins and the first heat dissipation fins, and six inner surfaces of the whole shell are all provided with sound insulation cotton and are free of air holes, so that the noise reduction and sound insulation effects are effectively achieved; the first heat dissipation fins and the second heat dissipation fins are matched with the first fan and the second fan to conduct heat transfer and dissipation, so that heat energy is dissipated outwards, the cooling and heat dissipation effects are achieved, and temperature rise during work in the power amplifier body is avoided while sound insulation and noise reduction are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of power amplifiers, in particular to a power amplifier with a noise reduction function. Background Art

[0002] A power amplifier, referred to as a power amplifier, refers to an amplifier that can generate maximum power output to drive a certain load under given distortion conditions. The power amplifier plays a pivotal role in organizing and coordinating the entire audio system, and to some extent dominates whether the entire system can provide good sound quality output. Existing power amplifiers will generate large internal noise due to the interaction of internal components, affecting the normal use of users. In order to reduce noise, a soundproof box is usually set outside the power amplifier to reduce noise. In actual use, although the soundproof box can absorb noise, the sealed box of the soundproof box has a greater impact on the heat dissipation of the power amplifier, causing the temperature of the power amplifier to rise. When the temperature of the power amplifier rises, the power amplifier will generate thermal noise, and the higher temperature has a greater impact on the normal operation of the power amplifier, as follows Figure 6 As shown, in order to improve the heat dissipation effect, heat dissipation holes are usually opened. However, opening the heat dissipation holes will cause the inside and outside of the sound insulation box to be connected, affecting the sound insulation effect. Therefore, we have introduced a power amplifier with noise reduction function to optimize the above situation. Utility Model Content

[0003] The purpose of the utility model is to provide a power amplifier with a noise reduction function to solve the problems raised in the above background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A power amplifier with a noise reduction function comprises a power amplifier body, the power amplifier body comprises a shell, the inner side of the shell is fixedly attached with sound insulation cotton, a first heat dissipation fin is fixedly installed on the back side of the shell, a second heat dissipation fin corresponding to the first heat dissipation fin is arranged on the outer side of the first heat dissipation fin, a semiconductor refrigeration fin is sandwiched between the second heat dissipation fin and the first heat dissipation fin, the first heat dissipation fin and the second heat dissipation fin are fixedly installed with the shell by bolts, the first heat dissipation fin and the second heat dissipation fin are both provided with round holes for the bolts to pass through, the shell is provided with threaded holes for the bolts to be threadedly connected, a first fan is fixedly installed on the second heat dissipation fin, the fin of the first heat dissipation fin passes through the shell and the sound insulation cotton and is fixedly connected with a baffle, the edge of the baffle extends to the outer side of the first heat dissipation fin and the second fan is fixedly installed, a notch is provided on the baffle for the second fan to enter the air, and the second fan is a blower fan.

[0006] As a further solution of the utility model: handles are symmetrically arranged on both sides of the front part of the shell, and legs are arranged on the bottom of the shell, and both the handles and the legs are designed in a circular shape.

[0007] As a further solution of the utility model: first storage grooves for installing the handles are symmetrically provided on both sides of the shell, and the handles are placed in the first storage grooves.

[0008] As a further solution of the utility model: guide grooves are symmetrically provided on the top and bottom of the first storage groove, insertion holes are provided at the end positions of the guide grooves, and a contraction cavity is provided on the handle corresponding to the guide grooves, and a convex pin matching with it is slidably connected in the contraction cavity, and a spring is fixedly connected between the convex pin and the bottom of the contraction cavity, the convex pin corresponds to and matches the guide groove and the insertion hole, the end face of the convex pin is waist-shaped, the convex pin is inserted into the guide groove to form a sliding guide, and the convex pin is inserted into the insertion hole to form a limited fixation.

[0009] As a further solution of the utility model: the bottom surface of the shell is provided with a second receiving groove for installing the legs, the legs are arranged in a circular shape, and the legs are arranged in the second receiving groove.

[0010] As a further solution of the utility model: one side of the leg is hinged to the inner wall of the second storage slot through a pin shaft, the other side of the leg is provided with a hand buckle groove, a magnetic attraction plate is fixedly embedded on the leg, a magnet is fixedly embedded on the outer shell corresponding to the magnetic attraction plate, the magnet is magnetically connected to the magnetic attraction plate, and a limiting slope is provided at the pin shaft of the second storage slot.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The six inner surfaces of the entire shell of the utility model are all provided with sound insulation cotton, and there are no air holes, so as to effectively play the role of noise reduction and sound insulation. The heat is transferred through the semiconductor refrigeration sheet, and the first heat dissipation fin and the second heat dissipation fin cooperate with the first fan and the second fan to transfer and dissipate the heat energy, so that the heat energy is dissipated outward, and a cold air circulation is formed inside the shell, which plays the role of cooling and heat dissipation, and ensures sound insulation and noise reduction while avoiding the internal working temperature of the power amplifier body.

[0013] 2. The utility model adopts the design of movable and adjustable handle and legs. When in use, the handle can be retracted into the first storage slot to prevent the handle from affecting wiring or operation. At the same time, the legs can be flipped open to tilt the power amplifier body, thereby facilitating operation and making the use of the entire power amplifier more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The figure is a schematic diagram of the structure of a power amplifier with noise reduction function.

[0015] Figure 2The figure is a side cross-sectional view of a power amplifier with noise reduction function.

[0016] Figure 3 The figure is a partial structural cross-sectional view of a power amplifier with noise reduction function.

[0017] Figure 4 A diagram showing the convex pins in a power amplifier with noise reduction function.

[0018] Figure 5 A diagram showing a baffle in a power amplifier with noise reduction function.

[0019] Figure 6 Schematic diagram of an existing power amplifier.

[0020] In the figure: 1. power amplifier body; 2. housing; 3. sound insulation cotton; 4. first heat dissipation fin; 5. second heat dissipation fin; 6. semiconductor refrigeration plate; 7. first fan; 8. baffle; 9. second fan; 10. handle; 11. leg; 12. first storage slot; 13. guide slot; 14. jack; 15. retraction chamber; 16. protruding pin; 17. spring; 18. second storage slot; 19. hand buckle slot; 20. magnetic suction plate; 21. magnet; 22. limit slope. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5In an embodiment of the utility model, a power amplifier with a noise reduction function comprises a power amplifier body 1, the power amplifier body 1 comprises a shell 2, the front surface of the shell 2 is provided with an interface, a button and an operation screen, the connection wires of the interface, the button and the operation screen are all passed through the sound insulation cotton 3, the shell 2 is provided with a threading hole for the connection wire to pass through, the threading hole is provided with a seal, the inner side of the shell 2 is fixedly pasted with the sound insulation cotton 3, the back side of the shell 2 is fixedly provided with a first heat dissipation fin 4, the outer side of the first heat dissipation fin 4 is provided with a second heat dissipation fin 5 corresponding thereto, and the second heat dissipation fin 5 and the first heat dissipation fin 4 are sandwiched together A semiconductor refrigeration sheet 6 is held, and the first heat dissipation fin 4 and the second heat dissipation fin 5 are fixedly installed with the housing 2 by bolts. The first heat dissipation fin 4 and the second heat dissipation fin 5 are both provided with round holes for the bolts to pass through, and the housing 2 is provided with threaded holes for the bolts to be threadedly connected. A first fan 7 is fixedly installed on the second heat dissipation fin 5. The fins of the first heat dissipation fin 4 pass through the housing 2 and the sound insulation cotton 3 and are fixedly connected with a baffle 8. The edge of the baffle 8 extends to the outside of the first heat dissipation fin 4 and is fixedly installed with a second fan 9. The baffle 8 is provided with a notch for the second fan 9 to enter the air, and the second fan 9 is a blower fan.

[0023] The six inner surfaces of the entire outer shell 2 are all provided with sound insulation cotton and have no air holes, so as to effectively achieve the effect of noise reduction and sound insulation. The heat is transferred through the semiconductor refrigeration sheet 6, and the heat is transferred and dissipated through the first heat dissipation fin 6 and the second heat dissipation fin 7 in cooperation with the first fan 7 and the second fan 9, so that the heat energy is dissipated outward, and a cold air circulation is formed inside the outer shell 2, which achieves the effect of cooling and heat dissipation, and ensures sound insulation and noise reduction while avoiding the internal working temperature rise of the power amplifier body 1.

[0024] Handles 10 are symmetrically arranged on both sides of the front of the shell 2, and legs 11 are arranged at the bottom of the shell 2. The handles 10 and the legs 11 are both of circular design.

[0025] First receiving grooves 12 for installing the handle 10 are symmetrically provided on both sides of the housing 2 , and the handle 10 is placed in the first receiving grooves 12 .

[0026] The top and bottom of the first receiving groove 12 are symmetrically provided with guide grooves 13, and the end position of the guide groove 13 is provided with a socket 14. A contraction cavity 15 is provided on the handle 10 corresponding to the guide groove 13, and a convex pin 16 matching with it is slidably connected in the contraction cavity 15. A spring 17 is fixedly connected between the convex pin 16 and the cavity bottom of the contraction cavity 15. The convex pin 16 corresponds to and matches the guide groove 13 and the socket 14. The end face of the convex pin 16 is waist-shaped. The convex pin 16 is inserted into the guide groove 13 to form a sliding guide, and the convex pin 16 is inserted into the socket 14 to form a limit fixation.

[0027] The handle 10 can be stored in the first storage groove 12, and the handle 10 can slide along the guide groove 13 through the protruding pin 16 to adjust its posture, and at the same time cooperate with the insertion hole 14 to form a limit fixation, and the protruding pin 16 elastically presses against the inner wall of the guide groove 13 through the spring 17 to form a damping sliding effect, so that the handle 10 can be stored in the first storage groove 12 to form a storage effect, or the handle 10 can be extended for easy lifting and carrying.

[0028] The bottom surface of the housing 2 is provided with a second receiving groove 18 for installing the supporting leg 11 . The supporting leg 11 is arranged in a circular shape and is arranged in the second receiving groove 18 .

[0029] One side of the leg 11 is hinged to the inner wall of the second receiving groove 18 through a pin shaft, and the other side of the leg 11 is provided with a hand-grip groove 19. A magnetic attraction plate 20 is fixedly embedded on the leg 11, and a magnet 21 is fixedly embedded on the outer shell 2 corresponding to the magnetic attraction plate 20. The magnet 21 is magnetically connected to the magnetic attraction plate 20, and a limiting slope 22 is provided at the pin shaft of the second receiving groove 18.

[0030] By means of the magnetic sheet 20 and the magnet 21, the leg 11 can be magnetically attracted into the second receiving slot 18 to form a folded storage. The leg 11 can be conveniently moved by means of the hand-grip slot 19. The open leg 11 can be limited by the setting of the limiting slope 22, so that the power amplifier body 1 can be conveniently supported at an angle.

[0031] Through the design of the movable and adjustable handle 10 and the leg 11, the handle can be retracted into the first storage slot 12 during use to prevent the handle 10 from affecting wiring or operation. At the same time, the leg 11 can be flipped open to tilt the power amplifier body 1 to facilitate operation and make the use of the entire power amplifier more convenient.

[0032] The semiconductor cooling sheet 6 , the first fan 7 and the second fan 9 are all electrically connected to the power module and the switch on the power generator body 1 .

[0033] The working principle of the utility model is:

[0034] When in use, first pull the handle 10 directly until the convex pin 16 corresponds to the insertion hole 14, at this time, the convex pins 16 on the left and right lower sides of the spring 17 are ejected from the contraction cavity 15, so that the convex pin 16 is inserted into the insertion hole 14 to form a fixing effect. At this time, the power amplifier body 1 can be lifted and carried by the handle 10, and after moving to the use position, the convex pin 16 is squeezed so that the convex pin 16 is flush with the guide groove 13, and the handle 10 is pushed into the first storage groove 12 for storage, and the leg 11 is further pulled through the hand buckle groove 19 to release the magnetic attraction relationship between the magnetic attraction sheet 20 and the magnet 21, and the leg 11 is pulled out of the second storage groove 18, so that the leg 11 is rotated through the pin shaft until it fits with the limit slope 22, so that the power amplifier body 1 The power amplifier body 1 is supported at an angle so that it can be wired and operated through switches, display screens and interfaces for power amplification. At this time, the semiconductor refrigeration sheet 6, the first fan 7 and the second fan 9 are working. At this time, the sound insulation cotton 3 soundproofs and reduces noise inside the shell 2. The semiconductor refrigeration sheet 6 transfers cold energy to the first heat dissipation fin 4 and transfers heat energy to the second heat dissipation fin 5. At this time, the first fan 7 accelerates the heat dissipation of the second heat dissipation fin 5. The second fan 9 draws in the air in the shell 2 and blows it toward the flow channel formed by the baffle 8, the first heat dissipation fin 4 and the sound insulation cotton 3, thereby forming an air circulation, so that the circulating air is cooled through the flow channel, thereby realizing the heat dissipation of the power amplifier body 1.

[0035] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power amplifier with noise reduction function, comprising a power amplifier body (1), characterized in that: The power amplifier body (1) comprises a shell (2), the inner side of the shell (2) is fixedly bonded with sound insulation cotton (3), a first heat dissipation fin (4) is fixedly mounted on the back side of the shell (2), a second heat dissipation fin (5) corresponding to the first heat dissipation fin (4) is arranged on the outer side of the first heat dissipation fin (4), a semiconductor cooling fin (6) is sandwiched between the second heat dissipation fin (5) and the first heat dissipation fin (4), the first heat dissipation fin (4) and the second heat dissipation fin (5) are fixedly mounted on the shell (2) by bolts, a first fan (7) is fixedly mounted on the second heat dissipation fin (5), the fins of the first heat dissipation fin (4) penetrate the shell (2) and the sound insulation cotton (3) and are fixedly connected to a baffle (8), the edge of the baffle (8) extends to the outer side of the first heat dissipation fin (4) and is fixedly mounted with a second fan (9).

2. The power amplifier with noise reduction function according to claim 1, characterized in that: Handles (10) are symmetrically arranged on both sides of the front of the shell (2), and supporting legs (11) are arranged at the bottom of the shell (2).

3. The power amplifier with noise reduction function according to claim 2, characterized in that: First receiving grooves (12) for installing the handle (10) are symmetrically provided on both sides of the shell (2), and the handle (10) is placed in the first receiving groove (12).

4. The power amplifier with noise reduction function according to claim 3, characterized in that: The top and bottom of the first receiving groove (12) are symmetrically provided with guide grooves (13), and the end positions of the guide grooves (13) are provided with insertion holes (14). A contraction cavity (15) is provided on the handle (10) at a position corresponding to the guide groove (13), and a convex pin (16) matching with the contraction cavity (15) is slidably connected in the contraction cavity (15), and a spring (17) is fixedly connected between the convex pin (16) and the cavity bottom of the contraction cavity (15), and the convex pin (16) corresponds to and matches the guide groove (13) and the insertion hole (14).

5. The power amplifier with noise reduction function according to claim 2, characterized in that: The shell (2) is driven to open a second receiving groove (18) on the bottom surface for installing the supporting leg (11); the supporting leg (11) is arranged in a circular shape and the supporting leg (11) is arranged in the second receiving groove (18).

6. The power amplifier with noise reduction function according to claim 5, characterized in that: One side of the support leg (11) is hinged to the inner wall of the second receiving groove (18) through a pin shaft, and the other side of the support leg (11) is provided with a hand-grip groove (19). A magnetic attraction sheet (20) is fixedly embedded on the support leg (11), and a magnet (21) is fixedly embedded on the housing (2) at a position corresponding to the magnetic attraction sheet (20). The magnet (21) is magnetically connected to the magnetic attraction sheet (20), and a limiting slope (22) is provided at a position corresponding to the pin shaft of the second receiving groove (18).

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