A noise reduction device for an evaporator of a vehicle-mounted refrigerator

Abstract

The utility model discloses a kind of evaporator noise reduction devices of vehicle-mounted refrigerator, it is related to refrigeration equipment field.The utility model includes refrigerator body, the right side of refrigerator body is fixedly connected with external frame, and noise reduction mechanism is arranged on the external frame.The utility model is provided with noise reduction mechanism, when the device is assembled, multiple sound-absorbing cotton and sound insulation board can be cross stacked together and placed in the inside of connecting frame, the positioning column is accurately inserted into positioning hole one simultaneously, so that sound insulation board can be stably fixed in the corresponding position in connecting frame, and then ensure that sound-absorbing cotton can also be evenly distributed in the internal space of connecting frame, after cross stacking, a kind of collaborative working noise reduction system is formed, sound-absorbing cotton first absorbs noise preliminarily, reduces the sound energy of entering sound insulation board, and sound insulation board further blocks the propagation of remaining noise, to more efficiently reduce the noise generated by device operation.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration equipment technology, and in particular relates to a noise reduction device for the evaporator of a vehicle refrigerator. Background Technology

[0002] During operation, the evaporator of a car refrigerator (especially a compressor-type refrigerator) generates noise due to compressor vibration, refrigerant airflow impact, material thermal expansion and contraction, and fan operation. The enclosed space of a car (such as the driver's cabin or RV living area) amplifies this noise, and the close proximity (often less than 1 meter) between the driver and the refrigerator makes it easily perceptible. As users demand higher levels of driving comfort, the evaporator noise (25-35 dB(A)) combined with the vehicle's tire and wind noise can cause driver fatigue and disrupt rest, especially in new energy vehicles and luxury cars where quietness is paramount. Furthermore, fluctuations in vehicle power supply voltage and driving bumps exacerbate noise instability. Industry standards (such as QB / T 4474-2013) also impose clear limits on car refrigerator noise (≤45 dB(A)). Low noise has become a key differentiator for products. Therefore, noise reduction of the car refrigerator evaporator is essential for adapting to the car environment, meeting user needs, and complying with industry standards, achieving a balance between refrigerator functionality and driving comfort.

[0003] During evaporator operation, existing equipment lacks a reasonable noise reduction structure and cannot form an effective noise reduction system, resulting in poor noise absorption and blocking effects. Moreover, when installing sound-absorbing and sound-insulating materials, it is not easy to ensure that these materials fit tightly and are evenly distributed. Traditional assembly methods cannot ensure that the sound-absorbing cotton is accurately filled in the corresponding positions, resulting in a significant reduction in sound absorption and sound insulation effects. In addition, when fixing sound-absorbing and sound-insulating materials, it is not easy to keep them in a tight state, and loosening may affect the overall noise reduction performance. Utility Model Content

[0004] The purpose of this utility model is to provide a noise reduction device for the evaporator of a vehicle refrigerator. By setting up a noise reduction mechanism and the superposition effect of multiple sound-absorbing cotton and sound insulation boards, the sound insulation effect of the overall device is further improved. This solves the problem that existing equipment lacks a reasonable noise reduction structure and cannot form an effective noise reduction system, resulting in poor noise absorption and blocking effects.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a noise reduction device for the evaporator of a vehicle refrigerator, including a refrigerator body. An outer frame is fixedly connected to the right side of the refrigerator body, and a noise reduction mechanism is provided on the outer frame.

[0007] The noise reduction mechanism includes connecting frames fixedly connected to the front, rear, and top sides of the outer frame, respectively. The three connecting frames are all connected to the interior of the outer frame. Four positioning posts are fixedly connected to the inner wall of the connecting frames. Multiple sound-absorbing cotton and sound-insulating boards are stacked crosswise inside the connecting frames. Multiple sound-insulating holes are opened on each of the sound-insulating boards. Four positioning holes are opened on each of the sound-insulating boards. The inner wall of each positioning hole is slidably connected to the outer wall of each positioning post.

[0008] Furthermore, several protrusions are fixedly connected to several of the sound insulation boards, and the protrusions are in contact with the sound-absorbing cotton.

[0009] Furthermore, the connecting frame is provided with a top plate, and the top plate has four positioning lugs, which are slidably connected to the outer walls of the four positioning posts respectively.

[0010] Furthermore, the top plate is fixedly connected to the front and rear sides with connecting ears one, and the connecting frame is fixedly connected to the front and rear sides with connecting ears two, with the two connecting ears one respectively fitting into the two connecting ears two.

[0011] Furthermore, each of the first connecting lugs is rotatably penetrated by a bolt, and each of the bolts is slidably penetrated by a second connecting lug. Each of the bolts is threaded with a nut, and each of the nuts is respectively engaged with one of the second connecting lugs.

[0012] Furthermore, the refrigerator body has an insulated cavity inside, and a door is hinged to the top of the refrigerator body.

[0013] Furthermore, an evaporator is fixedly connected to the inner wall of the insulation cavity, the evaporator is located on the left side inside the outer frame, and a fan unit is located on the right side of the outer frame.

[0014] This utility model has the following beneficial effects:

[0015] 1. By incorporating a noise reduction mechanism, multiple sound-absorbing cotton and sound-insulating boards can be stacked together and placed inside the connecting frame during assembly. Simultaneously, by accurately inserting the positioning pin into the positioning hole one, the sound-insulating board can be stably fixed in the corresponding position within the connecting frame, ensuring that the sound-absorbing cotton is also evenly distributed within the internal space of the connecting frame. After the two are stacked together, a collaborative noise reduction system is formed. The sound-absorbing cotton first absorbs the noise initially, reducing the sound energy entering the sound-insulating board, and the sound-insulating board further blocks the propagation of the remaining noise, thereby more efficiently reducing the noise generated by the operation of the device.

[0016] 2. By incorporating protrusions and a top plate, during the assembly of the top plate, connecting ear one can be aligned with connecting ear two, and the two connecting ears can be fixed with bolts and nuts. Simultaneously, the top plate can compress the stacked sound-absorbing cotton and sound-insulating board, making them fit more tightly. Multiple protrusions work together, ensuring that the sound-absorbing cotton and sound-insulating board are tightly pressed against the sound-absorbing cotton during assembly. This ensures that the sound-absorbing cotton is filled inside the connecting frame, thereby ensuring the sound absorption effect of the sound-absorbing cotton and sound-insulating board. Combined with the stacking effect of multiple sound-absorbing cotton and sound-insulating boards, the overall sound insulation effect of the device is further improved.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional structural diagram of the refrigerator body of this utility model;

[0021] Figure 3 This is a schematic diagram of the noise reduction mechanism of this utility model;

[0022] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0023] Figure 5 for Figure 3 A magnified structural diagram at point B in the middle.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Refrigerator body; 2. Noise reduction mechanism; 11. Insulation cavity; 12. Door; 13. Evaporator; 14. External frame; 15. Fan unit; 21. Connecting frame; 22. Positioning post; 23. Sound-absorbing cotton; 24. Sound insulation board; 25. Sound insulation hole; 26. Positioning hole one; 27. Protrusion; 28. Top plate; 29. ​​Positioning hole ear; 291. Connecting ear one; 292. Connecting ear two; 293. Bolt; 294. Nut. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 As shown, this utility model is a noise reduction device for a vehicle refrigerator evaporator, including a refrigerator body 1, an outer frame 14 fixedly connected to the right side of the refrigerator body 1, and a noise reduction mechanism 2 provided on the outer frame 14.

[0028] The noise reduction mechanism 2 includes connecting frames 21 fixedly connected to the front, rear, and top sides of the outer frame 14. All three connecting frames 21 are connected to the interior of the outer frame 14. Four positioning posts 22 are fixedly connected to the inner wall of each connecting frame 21. Multiple sound-absorbing cotton 23s and sound-insulating panels 24 are stacked crosswise inside the connecting frames 21. Each sound-insulating panel 24 has multiple sound-insulating holes 25 and four positioning holes 26. The inner walls of the positioning holes 26 are slidably connected to the outer walls of the positioning posts 22. Several sound insulation panels 24 are fixedly connected to several protrusions 27, which fit against the sound-absorbing cotton 23. A top plate 28 is provided on the connecting frame 21, and four positioning ears 29 are opened on the top plate 28. The four positioning ears 29 are slidably connected to the outer wall of four positioning posts 22 respectively. Connecting ears 1 291 are fixedly connected to the front and rear sides of the top plate 28, and connecting ears 292 are fixedly connected to the front and rear sides of the connecting frame 21. Two connecting ears 1 291 fit against two connecting ears 292 respectively. Several connecting ears 291 fit against the outer wall of four positioning posts 22. Each of the first ear 291 has a bolt 293 rotatably passing through it. Several bolts 293 slidably pass through the second connecting ear 292. Nuts 294 are threaded onto each of the bolts 293. Several nuts 294 are respectively engaged with several second connecting ears 292. By setting up a noise reduction mechanism 2, when assembling the top plate 28, the first connecting ear 291 can be aligned with the second connecting ear 292, and the first connecting ear 291 and the second connecting ear 292 can be fixed by the bolts 293 and nuts 294, so that the top plate 28 can be... The sound-absorbing cotton 23 and the sound insulation board 24 are squeezed together to make them fit more tightly. Multiple protrusions 27 cooperate with each other so that when the sound-absorbing cotton 23 and the sound insulation board 24 are stacked and assembled, the protrusions 27 can fit tightly against the sound-absorbing cotton 23. The compression of multiple sound-absorbing cotton 23 can ensure that the sound-absorbing cotton 23 can be filled inside the connecting frame 21, thereby ensuring the sound absorption effect of the sound-absorbing cotton 23 and the sound insulation board 24. The combined effect of multiple sound-absorbing cotton 23 and sound insulation board 24 further improves the sound insulation effect of the overall device.

[0029] The refrigerator body 1 has an insulated cavity 11 inside. The top of the refrigerator body 1 is hinged with a door 12. An evaporator 13 is fixedly connected to the inner wall of the insulated cavity 11. The evaporator 13 is located on the left side inside the outer frame 14. A fan unit 15 is located on the right side of the outer frame 14. The evaporator 13 and the fan unit 15 work together to exchange heat and cool the inside of the insulated cavity 11. At the same time, the heat is blown out from the right side slot of the outer frame 14 through multiple fan units 15.

[0030] A specific application of this embodiment is as follows: By providing a noise reduction mechanism 2, when assembling the device, multiple sound-absorbing cotton 23s and sound insulation boards 24 can be stacked together and placed inside the connecting frame 21. At the same time, by accurately inserting the positioning post 22 into the positioning hole 26, the sound insulation board 24 can be stably fixed in the corresponding position inside the connecting frame 21, thereby ensuring that the sound-absorbing cotton 23 can also be evenly distributed in the internal space of the connecting frame 21. After the two are stacked together, a collaborative noise reduction system is formed. The sound-absorbing cotton 23 first absorbs the noise initially, reducing the sound energy entering the sound insulation board 24. The sound insulation board 24 then further blocks the propagation of the remaining noise, thereby reducing the noise generated by the operation of the device more efficiently.

[0031] With the protrusions 27 and the top plate 28, when assembling the top plate 28, the connecting ear 1 291 can be aligned with the connecting ear 292, and the connecting ear 1 291 and the connecting ear 292 can be fixed by bolts 293 and nuts 294. At the same time, the top plate 28 can squeeze the stacked sound-absorbing cotton 23 and sound insulation board 24, making them fit more tightly. The multiple protrusions 27 cooperate with each other, so that when the sound-absorbing cotton 23 and sound insulation board 24 are stacked and assembled, the protrusions 27 can fit tightly against the sound-absorbing cotton 23 and squeeze the multiple sound-absorbing cotton 23. This ensures that the sound-absorbing cotton 23 can be filled inside the connecting frame 21, thereby ensuring the sound absorption effect of the sound-absorbing cotton 23 and the sound insulation board 24. Combined with the stacking effect of multiple sound-absorbing cotton 23 and sound insulation board 24, the sound insulation effect of the overall device is further improved.

[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A noise reduction device for an evaporator of a vehicle-mounted refrigerator, comprising a refrigerator body (1), characterized in that: An outer frame (14) is fixedly connected to the right side of the refrigerator body (1), and a noise reduction mechanism (2) is provided on the outer frame (14). The noise reduction mechanism (2) includes connecting frames (21) that are fixedly connected to the front and rear sides and top of the outer frame (14). The three connecting frames (21) are all connected to the interior of the outer frame (14). The inner wall of the connecting frame (21) is fixedly connected to four positioning posts (22). The interior of the connecting frame (21) is cross-stacked with multiple sound-absorbing cotton (23) and sound insulation boards (24). Multiple sound insulation holes (25) are opened on each of the sound insulation boards (24). Four positioning holes (26) are opened on each of the sound insulation boards (24). The inner wall of each positioning hole (26) is slidably connected to the outer wall of each positioning post (22).

2. The noise reduction device for a vehicle-mounted refrigerator evaporator according to claim 1, characterized in that, Several protrusions (27) are fixedly connected to several of the sound insulation boards (24), and the several protrusions (27) are attached to the sound-absorbing cotton (23).

3. The noise reduction device for a vehicle-mounted refrigerator evaporator according to claim 2, characterized in that, The connecting frame (21) is provided with a top plate (28), and the top plate (28) is provided with four positioning ears (29), which are slidably connected to the outer walls of the four positioning posts (22).

4. The noise reduction device for a vehicle-mounted refrigerator evaporator according to claim 3, characterized in that, The top plate (28) is fixedly connected to the front and rear sides with connecting ear 1 (291), and the connecting frame (21) is fixedly connected to the front and rear sides with connecting ear 2 (292). The two connecting ears 1 (291) are respectively attached to the two connecting ears 2 (292).

5. The noise reduction device for a vehicle-mounted refrigerator evaporator according to claim 4, characterized in that, Each of the first connecting lugs (291) is rotatably penetrated by a bolt (293), and each of the bolts (293) is slidably penetrated by a second connecting lug (292). Each of the bolts (293) is threaded with a nut (294), and each of the nuts (294) is in contact with a second connecting lug (292).

6. The noise reduction device for a vehicle-mounted refrigerator evaporator according to claim 5, characterized in that, The refrigerator body (1) has an insulated cavity (11) inside, and a door (12) is hinged to the top of the refrigerator body (1).

7. The noise reduction device for a vehicle-mounted refrigerator evaporator according to claim 6, characterized in that, An evaporator (13) is fixedly connected to the inner wall of the insulation cavity (11). The evaporator (13) is located on the left side inside the outer frame (14). A fan unit (15) is located on the right side of the outer frame (14).

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