Internal noise elimination mechanism for air duct assembly of vehicle air conditioner

Abstract

The utility model relates to the technical field of vehicle air conditioner noise elimination, in particular to a vehicle air conditioner air duct assembly internal noise elimination mechanism which comprises a noise elimination cylinder, a fixing piece used for fixing noise elimination cotton in the noise elimination cylinder is arranged in the noise elimination cylinder, and positioning pieces used for limiting the fixing piece in the noise elimination cylinder are arranged at the two ends of the noise elimination cylinder. One end of the outer wall of the silencing cylinder is fixedly connected with two symmetrical flange rings. According to the utility model, the two sponges and the silencing cotton are used for silencing flowing air for multiple times, so that when an air conditioner in a vehicle is started, the interior of the vehicle is quieter, the sponges can absorb moisture and impurities in the flowing air, the service life of the silencing cotton is longer, and the limiting ring is detachably connected with the silencing barrel and the connecting ring, so that the silencing effect is better. Not only can the silencing cotton be quickly disassembled and assembled, but also the silencing barrel, the fixing piece and the positioning piece can be recycled, so that the resource loss is reduced, and the cost expenditure of a driver is reduced.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning noise reduction technology, specifically a noise reduction mechanism inside an automotive air conditioning duct assembly. Background Technology

[0002] Automotive air conditioning is used to adjust and control the temperature, humidity, air cleanliness, and airflow inside a car cabin to the optimal state, providing a comfortable riding environment for passengers. The air duct assembly is a key component of the automotive air conditioning system. It is responsible for delivering the air processed by the air conditioning system to various air outlets inside the vehicle, while regulating the temperature, humidity, and airflow direction. When the air conditioning is turned on, the rotation of the blower will accelerate the airflow in the air duct, which will generate aerodynamic noise that will affect the driver's driving. Therefore, a muffler is usually installed in the air duct assembly to reduce aerodynamic noise.

[0003] Currently available mufflers typically use sound-absorbing cotton to reduce noise. However, the overall structure of the muffler is usually a single piece, with the sound-absorbing cotton located inside. After prolonged use, the sound-absorbing cotton absorbs moisture and impurities from the air due to airflow, resulting in a significant reduction in the muffler's noise reduction effect on the air duct assembly. Because of the muffler's single-piece structure and the sound-absorbing cotton's location inside, the current practice is to replace the entire muffler. This not only increases the driver's costs but also leads to a waste of resources. Utility Model Content

[0004] The purpose of this invention is to provide a noise reduction mechanism inside an automotive air conditioning duct assembly to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A noise reduction mechanism for an automotive air conditioning duct assembly includes a muffler. The muffler has a fixing member inside for fixing noise reduction cotton inside it. Both ends of the muffler have positioning members for limiting the fixing member inside the muffler. Two symmetrical flange rings are fixedly connected to one end of the outer wall of the muffler, and positioning rings are fixedly connected to both ends of the inner wall of the muffler.

[0007] The fastener includes a metal mesh cage, and both ends of the metal mesh cage are fixedly connected with connecting rings.

[0008] The positioning component includes a connecting tube, one end of which is fixedly connected to a limiting ring that is detachably connected to a positioning ring and a connecting ring at a corresponding position.

[0009] Furthermore, the metal mesh cage has multiple sound-absorbing shells fixedly connected at equal intervals inside, and the sound-absorbing shells are horn structures.

[0010] Further in, the side of the connecting ring is fixedly connected with two symmetrical screw rods which are inserted through the limiting ring at the corresponding position.

[0011] Further in, the outer diameter of the connecting ring is same with the inner diameter of the positioning ring and the limiting ring.

[0012] Further in, the inner wall of the connecting pipe is fixedly connected with a fixed ring, the inside of the connecting pipe is slidably sleeved with a clamping ring, and a plurality of elastic members are annularly and equiangularly fixedly connected between the clamping ring and the fixed ring at the corresponding position.

[0013] Further in, the elastic member comprises a sleeve fixedly connected with the fixed ring at the corresponding position, a sleeve rod is slidably sleeved in the sleeve and fixedly connected with the clamping ring at the corresponding position, and a spring is fixedly connected between the sleeve rod and the sleeve at the corresponding position.

[0014] Further in, the outer wall of the sound attenuation cylinder is fixedly connected with a sealing ring.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The flowing air is sound-attenuated for multiple times through the two sponges and the sound attenuation cotton, so that the car is more quiet when the air conditioner in the car is started, the sponge can absorb the moisture and impurities in the flowing air, the service life of the sound attenuation cotton is longer, and the limiting ring is detachably connected with the sound attenuation cylinder and the connecting ring, so that the sound attenuation cotton can be quickly disassembled and assembled, the sound attenuation cylinder, the fixing member and the positioning member can be cyclically used, the resource loss is reduced, and the cost expenditure of the driver is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is the overall structure schematic view of the utility model;

[0018] Figure 2 is the internal schematic view of the sound attenuation cylinder in the utility model;

[0019] Figure 3 is the schematic view of the sound attenuation cylinder in the utility model;

[0020] Figure 4 is the structure schematic view of the noise reduction assembly in the utility model;

[0021] Figure 5 is the structure schematic view of the positioning member in the utility model.

[0022] In the drawing: 1, sound attenuation cylinder; 11, flange; 12, positioning ring; 2, fixing member; 21, metal mesh cage; 22, sound attenuation shell; 23, connecting ring; 24, screw rod; 3, positioning member; 31, connecting pipe; 32, limiting ring; 33, fixed ring; 34, clamping ring; 35, elastic member. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0024] Please refer to Figure 1 Figure 5 In the embodiments of the utility model, a sound-absorbing mechanism inside a vehicle air conditioner air duct assembly comprises a sound-absorbing cylinder 1, the inside of the sound-absorbing cylinder 1 is provided with a fixing part 2 for fixing sound-absorbing cotton inside it, both ends of the sound-absorbing cylinder 1 are provided with a positioning part 3 for limiting the fixing part 2 inside the sound-absorbing cylinder 1, one end of the outer wall of the sound-absorbing cylinder 1 is fixedly connected with two symmetrical flange rings 11, both ends of the inner wall of the sound-absorbing cylinder 1 are fixedly connected with positioning rings 12, the fixing part 2 comprises a metal mesh cage 21, both ends of the metal mesh cage 21 are fixedly connected with connecting rings 23, the positioning part 3 comprises a connecting pipe 31, one end of the connecting pipe 31 is fixedly connected with a limiting ring 32 which is detachably connected with the positioning ring 12 and the connecting ring 23 at the corresponding position.

[0025] ​Specifically, first, the sound-absorbing cotton is wound into a circle and placed inside the silencer 1, positioned between the two positioning rings 12. Then, the metal mesh cage 21 is inserted from one end of the silencer 1 until the two connecting rings 23 are flush with the corresponding positioning rings 12. Next, the two limiting rings 32 are fixed to both ends of the silencer 1, and the limiting rings 32 are fixed to the corresponding connecting rings 23. At this point, the metal mesh cage 21 is fixed inside the silencer 1, providing support for the wound sound-absorbing cotton. Then, sponges are placed inside the two connecting pipes 31. Next, the air outlet of the duct assembly is separated from the duct assembly. Then, the silencer 1 (the end furthest from the two flange rings 11) is inserted into the duct assembly and fixed to the adjacent flange ring 11. Finally, the separated air outlet is fixed to the other flange ring 11, making the silencer 1, duct assembly, and air outlet a single unit. When the flowing air enters the silencer 1, it first passes through the sponge near the duct assembly, which reduces the airflow speed, thus... The aerodynamic noise generated by the air entering the muffler 1 is reduced by the sound-absorbing cotton. Then, when the air enters the air outlet, the flow rate is reduced again by the sponge, thus reducing noise. This makes the car quieter when the air conditioner is turned on. After long-term use, the muffler 1 is first removed from the air duct assembly and the air outlet. Then, the two limiting rings 32 are separated from the corresponding connecting rings 23 and removed from the muffler 1. At this time, the metal mesh cage 21 is released and can be pulled out from the inside of the muffler 1. Then, the sound-absorbing cotton is taken out from the inside of the muffler 1 and replaced with new sound-absorbing cotton. Then, the muffler 1, the fixing part 2, and the positioning part 3 are reassembled and fixed between the air duct assembly and the air outlet in the same way. By detachably connecting the limiting rings 32 to the muffler 1 and the connecting rings 23, it is not only convenient to quickly install and remove the sound-absorbing cotton, but also the muffler 1, the fixing part 2, and the positioning part 3 can be recycled, reducing resource consumption and reducing the driver's cost.

[0026] Example 1

[0027] like Figure 4 As shown, in this embodiment, multiple sound-absorbing shells 22 are fixedly connected at equal intervals inside the metal mesh cage 21. The sound-absorbing shell 22 is a horn structure. Two symmetrical screws 24 are fixedly connected to the side of the connecting ring 23 and are inserted through the corresponding limiting rings 32. The outer diameter of the connecting ring 23 is the same as the inner diameter of the positioning ring 12 and the limiting ring 32.

[0028] In this embodiment, multiple silencing shells 22 can further reduce the noise of the flowing gas entering the silencing cylinder 1, making the silencing effect of the device better. By inserting the screw 24 into the corresponding position of the limiting ring 32 and tightening it with a nut, the metal mesh cage 21 can be fixed between the two limiting rings 32, thereby supporting the silencing cotton.

[0029] Embodiment Two

[0030] As shown in Figure 3 and Figure 5 In this embodiment, the inner wall of the connecting pipe 31 is fixedly connected with a fixed ring 33, the inside of the connecting pipe 31 is slidably sleeved with a clamping ring 34, a plurality of elastic members 35 are annularly and equiangularly fixedly connected between the clamping ring 34 and the fixed ring 33 at the corresponding positions, the elastic member 35 comprises a sleeve fixedly connected with the fixed ring 33 at the corresponding position, a sleeve rod fixedly connected with the clamping ring 34 at the corresponding position is slidably sleeved in the sleeve, a spring is fixedly connected between the sleeve rod and the sleeve at the corresponding position, and the outer wall of the sound elimination cylinder 1 is fixedly connected with a sealing ring.

[0031] In this embodiment, the clamping ring 34 is pulled away from the fixed ring 33, then the sponge is inserted between the clamping ring 34 and the fixed ring 33 (the sponge is flexible and can be squeezed to reduce the volume), then the clamping ring 34 is loosened, at this time the sponge is fixed between the clamping ring 34 and the fixed ring 33 under the elastic action of the plurality of springs, the sponge can not only absorb the moisture and impurities in the flowing air, but also reduce the flow speed of the air, so that the sound elimination effect can be further improved, and the sealing ring can increase the sealing property between the sound elimination cylinder 1 and the air duct assembly and the air outlet, so as to prevent the air leakage.

[0032] It is apparent for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and range of equivalents of the elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be considered as limiting the claims involved.

[0033] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An internal sound attenuation mechanism for an air conditioning duct assembly for a vehicle, comprising: The application relates to a sound-absorbing cylinder (1) which is internally provided with fixing members (2) for fixing sound-absorbing cotton in the inside of the sound-absorbing cylinder (1), and the sound-absorbing cylinder (1) is provided with positioning members (3) for limiting the fixing members (2) in the inside of the sound-absorbing cylinder (1) at both ends of the sound-absorbing cylinder (1), the outer wall of the sound-absorbing cylinder (1) is fixedly connected with two symmetrical flange rings (11) at one end, and the inner wall of the sound-absorbing cylinder (1) is fixedly connected with positioning rings (12) at both ends. The fixing member (2) comprises a metal mesh cage (21), and the metal mesh cage (21) is fixedly connected with connecting rings (23) at both ends. The positioning member (3) comprises a connecting pipe (31), and one end of the connecting pipe (31) is fixedly connected with limiting rings (32) which are detachably connected with the positioning rings (12) and the connecting rings (23) at corresponding positions.

2. The vehicle air conditioning duct assembly internal sound attenuation mechanism of claim 1, wherein, The metal mesh cage (21) is fixedly connected with multiple sound-absorbing shells (22) at equal intervals in the inside, and the sound-absorbing shell (22) is a horn structure.

3. The vehicle air conditioning duct assembly internal sound attenuation mechanism of claim 2, wherein, The side surface of the connecting ring (23) is fixedly connected with two symmetrical screw rods (24) which are inserted through the limiting rings (32) at corresponding positions.

4. The internal sound attenuation mechanism for an air conditioning duct assembly of a vehicle of claim 3, wherein, The outer diameter of the connecting ring (23) is the same as the inner diameter of the positioning ring (12) and the limiting ring (32).

5. The vehicle air conditioning duct assembly internal sound attenuation mechanism of claim 1, wherein, The inner wall of the connecting pipe (31) is fixedly connected with a fixing ring (33), the connecting pipe (31) is internally slidably sleeved with a clamping ring (34), and multiple elastic members (35) are fixedly connected between the clamping ring (34) and the fixing ring (33) at corresponding positions.

6. The internal sound attenuation mechanism for an air conditioning duct assembly of a vehicle of claim 5, wherein, The elastic member (35) comprises a sleeve fixedly connected with the fixing ring (33) at a corresponding position, a sleeve rod fixedly connected with the clamping ring (34) at a corresponding position is slidably sleeved in the sleeve, and a spring is fixedly connected between the sleeve rod and the sleeve at a corresponding position.

7. The vehicle air conditioning duct assembly internal sound attenuation mechanism of claim 6, wherein, The outer wall of the sound-absorbing cylinder (1) is fixedly connected with a sealing ring.

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