A new intake muffler structure

Abstract

The utility model discloses a novel air intake muffler structure belongs to the technical field of muffler equipment, it mainly includes the muffler casing, a plurality of groups of sound attenuation structure are fixedly connected with in the muffler casing equidistance, the sound attenuation structure includes two interval placement's main sound attenuation chamber, two the sound attenuation pipe of fixedly connected with in the middle of main sound attenuation chamber, a plurality of sound attenuation holes no.

Description

Technical Field

[0001] This utility model belongs to the field of noise reduction equipment technology, and more specifically, it relates to a novel intake muffler structure. Background Technology

[0002] Automotive mufflers developed alongside the widespread adoption of internal combustion engine vehicles. Early mufflers were plagued by severe noise pollution from engine intake (including high-frequency whistling and low-frequency booming), impacting the environment and driving experience, thus creating a demand for noise reduction. Initially, simple structures could only reduce low-frequency noise and were prone to affecting engine power due to excessive intake back pressure. Existing muffler mechanisms suffer from drawbacks such as insufficient noise reduction, significant power loss, and high cost.

[0003] To address the aforementioned technical problems, this application proposes a solution. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide a new type of intake muffler structure, which has multiple sets of muffler structures installed inside the muffler housing. When sound waves propagate in the pipe, reflection and interference will occur at the point of abrupt change in cross-section (such as cavity or perforation), and some sound waves will be out of phase and cancel each other out.

[0005] The novel intake muffler structure includes a muffler housing. Multiple muffler structures are fixedly connected at equal intervals inside the muffler housing. Each muffler structure includes two spaced-apart main muffler chambers. A muffler pipe is fixedly connected between the two main muffler chambers. Multiple muffler holes are arranged on the muffler pipe. Each main muffler chamber has a C-shaped semi-enclosed structure with a central hole. A muffler pipe is fixedly connected inside the central hole. Multiple sound transmission holes are opened in one half of the bottom of each main muffler chamber, and multiple fins are fixedly connected to the other half of the bottom. Multiple muffler holes are opened on the fins.

[0006] Preferably, the muffler housing has a sandwich layer, and sound insulation cotton is fixedly connected inside the sandwich layer. An air inlet pipe is fixedly connected to one end of the main silencing chamber of the muffler housing, and an air outlet pipe is fixedly connected to the other end of the muffler housing.

[0007] Preferably, the air inlet pipe and the air outlet pipe are marked with positive and negative markings respectively.

[0008] Preferably, the diameter of the central hole in the middle of the main anechoic chamber is smaller on the side of the opening of the main anechoic chamber than on the side of the bottom of the main anechoic chamber.

[0009] Preferably, the sound transmission holes at the bottom of the two main silencing chambers in each group of silencing structures are staggered, and the sound transmission holes at the bottom of the second main silencing chamber in the first group and the first main silencing chamber in the second group of every two groups of silencing structures are staggered.

[0010] Preferably, the opening of the main silencing chamber is inclined toward the central hole.

[0011] Compared with the prior art, the beneficial effects of this utility model are: This invention features multiple sets of muffler structures installed within the muffler housing, tailored to the vehicle's engine displacement. Each set consists of two main muffler chambers. Sound waves transmitted to the main muffler chamber are partially canceled out by multiple reflections through the muffler holes on the chamber's fins. The remaining sound waves travel through the transmission holes to the next main muffler chamber, where they are again canceled out by multiple reflections. A muffler tube connected to the central hole transmits a portion of the sound waves to the next set of muffler structures. During this transmission, reflections and interference occur within the cavity, with some sound waves canceling each other out due to their opposite phase. This design offers a more significant muffler effect and a more rational structural design compared to traditional automotive muffler structures. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the external structure of this utility model; Figure 2 This is a cross-sectional view of the internal structure of this utility model; Figure 3 This is a schematic diagram of the silencing mechanism in this utility model; Figure 4 This is a schematic diagram of the main anechoic chamber in this utility model. Figure 5 This is a structural diagram showing the installation positions of the muffler housing and sound insulation cotton in this utility model.

[0013] In the diagram, 1 is the muffler housing; 2 is the air inlet pipe; 3 is the air outlet pipe; 4 is the sound insulation cotton; 5 is the muffler structure; 501 is the main muffler chamber; 5011 is the sound transmission hole; 5012 is the fin; 5013 is the first muffler hole; 5014 is the central hole; 502 is the muffler pipe; and 5021 is the second muffler hole. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings: The directional terms used in the detailed description paragraphs are only for the convenience of those skilled in the art to understand the technical solutions described in this application based on the visual orientation shown in the accompanying drawings. Unless otherwise expressly specified and limited, the terms "setting," "installation," "connection," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0015] like Figures 1 to 5As shown, a novel intake muffler structure includes a muffler housing 1. Multiple sets of silencing structures 5 are equidistantly fixed inside the muffler housing 1. Each set of silencing structures 5 is individually and equally spaced within the muffler housing 1. Each silencing structure 5 includes two spaced-apart main silencing chambers 501, with a silencing pipe 502 fixedly connected between them. The silencing pipe 502 serves to transmit sound waves that cannot be temporarily neutralized at the front end to the silencing structures 5 at the rear. Multiple silencing holes 5021 are arranged on the silencing pipe 502. The design of these holes diffuses the sound waves, which are then reflected and neutralized inside the muffler housing 1. The main anechoic chamber 501 has a C-shaped semi-enclosed structure with a central hole 5014. A silencing pipe 502 is fixedly connected inside the central hole 5014. Multiple sound transmission holes 5011 are located on the bottom half of the main anechoic chamber 501, which are then transmitted to the fins 5012 of the next main anechoic chamber 501 for cancellation. Multiple fins 5012 are fixedly connected to the other half of the bottom, and multiple silencing holes 5013 are located on the fins 5012. Sound waves are transmitted through the silencing holes 5013 on the fins 5012, and the reflected sound waves interfere and cancel each other out.

[0016] like Figure 2 As shown, the silencer housing 1 has a sandwich layer, inside which sound-insulating cotton 4 is fixedly connected. In this invention, the sound-insulating cotton 4 is made of rock wool. It wraps around the outside of the silencer housing 1 to prevent sound waves from leaking out. The main silencing chamber 501 of the silencer housing 1 has an air inlet pipe 2 fixedly connected to one end facing the opening, and an air outlet pipe 3 fixedly connected to the other end of the silencer housing 1. The air inlet pipe 2 and the air outlet pipe 3 are marked with positive and negative markings, respectively. The reason for this design is that when installed in the correct orientation, sound waves can be more easily canceled out.

[0017] like Figure 4 As shown, the central hole 5014 in the middle of the main anechoic chamber 501 has a smaller diameter than the bottom side of the main anechoic chamber 501 on the side of the opening. The advantage of this design is that when sound waves travel from the central hole 5014 on one side of the opening to the other, the chamber becomes larger, the distance the sound waves travel increases, and the forward and backward sound waves cancel each other out during the sound wave transmission process, resulting in a significant noise reduction effect, especially for mid- and low-frequency frequencies.

[0018] The sound transmission holes 5011 at the bottom of the two main anechoic chambers 501 in each set of anechoic structures 5 are staggered. Furthermore, the sound transmission holes 5011 at the bottom of the second main anechoic chamber 501 in the first set and the first main anechoic chamber 501 in the second set are also staggered. This design allows the sound waves to gradually decrease in intensity across multiple sets of anechoic structures 5, ultimately reducing the loudness.

[0019] The opening of the main anechoic chamber 501 is inclined toward the central hole 5014. The advantage of this design is that the sound waves transmitted from the air intake pipe 2 are better transmitted into the main anechoic chamber 501, and the inclined opening direction makes it easier for the sound waves to be reflected and canceled out.

[0020] Finally, although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A novel intake muffler structure, comprising a muffler housing (1), characterized in that: The muffler housing (1) has multiple sets of muffler structures (5) fixedly connected at equal intervals inside. The muffler structure (5) includes two main muffler chambers (501) placed at intervals. A muffler pipe (502) is fixedly connected between the two main muffler chambers (501). A number of muffler holes (5021) are arranged on the muffler pipe (502). The main muffler chamber (501) is a "C"-shaped semi-enclosed structure with a central hole (5014) in the middle. A muffler pipe (502) is fixedly connected inside the central hole (5014). A number of sound transmission holes (5011) are opened on one half of the bottom of the main muffler chamber (501), and a number of fins (5012) are fixedly connected on the other half of the bottom. A number of muffler holes (5013) are opened on the fins (5012).

2. The novel intake muffler structure according to claim 1, characterized in that: The muffler housing (1) is provided with a sandwich layer, and sound insulation cotton (4) is fixedly connected inside the sandwich layer. The main muffler chamber (501) of the muffler housing (1) is fixedly connected to one end with an air inlet pipe (2), and the other end of the muffler housing (1) is fixedly connected to an air outlet pipe (3).

3. The novel intake muffler structure according to claim 2, characterized in that: The air inlet pipe (2) and the air outlet pipe (3) are marked with positive and negative markings respectively.

4. The novel intake muffler structure according to claim 1, characterized in that: The central hole (5014) in the middle of the main silencing chamber (501) has a smaller diameter than the bottom side of the main silencing chamber (501) on the side of the opening of the main silencing chamber (501).

5. The novel intake muffler structure according to claim 1, characterized in that: The sound transmission holes (5011) at the bottom of the two main silencing chambers (501) in each set of silencing structures (5) are staggered, and the sound transmission holes (5011) at the bottom of the second main silencing chamber (501) in the first set and the first main silencing chamber (501) in the second set of silencing structures (5) are staggered.

6. The novel intake muffler structure according to claim 1, characterized in that: The opening of the main silencing chamber (501) is inclined toward the central hole (5014).

Images