Vehicle-mounted air conditioner secondary silencer and silencing method

Abstract

The invention relates to the technical field of silencers, in particular to a secondary silencer of a vehicle-mounted air conditioner and a silencing method. The secondary silencer comprises a shell, a shell cover, a connecting pipe, a silencing pipe, a first silencing cavity and a second silencing cavity; the vehicle-mounted air conditioner secondary silencer is installed at the preset position of a vehicle; the secondary silencer of the vehicle-mounted air conditioner is used for silencing the vehicle-mounted air conditioner, under the simultaneous sound absorption and silencing effects of the two silencing cavities, the sound intensity is greatly reduced, finally, the sound is further weakened through the silencing cotton interlayer, the noise is reduced again, the comfort is improved when a long-distance driver has a rest, other people are prevented from being influenced, and the vehicle-mounted air conditioner is safe and reliable. Therefore, the problem that an existing vehicle-mounted air conditioner silencer is low in silencing efficiency is solved.

Description

Technical Field

[0001] This invention relates to the field of muffler technology, and in particular to a two-stage muffler for vehicle air conditioning and a method for muffler operation. Background Technology

[0002] Currently, automotive air conditioning systems mainly consist of components such as an air conditioning compressor, condenser, expansion valve, and evaporator. When truck drivers rest at service areas or other rest stops, they rely on a parking alternator to generate electricity and power the air conditioning system. Since the automotive air conditioning system is responsible for cooling and heating the passenger compartment, noise directly affects the comfort of the passengers. The refrigerant flow rate inside the air conditioning pipes varies significantly within each component, resulting in noticeable refrigerant pressure pulsations and fluid noise. An internal muffler is an effective way to reduce refrigerant fluid noise within a limited space; implementation simply involves inserting the muffler into the air conditioning pipes.

[0003] However, the frequency of refrigerant fluid noise encountered in NVH testing varies greatly, requiring the use of various built-in silencers, which is inefficient and results in a long testing cycle. Summary of the Invention

[0004] The purpose of this invention is to provide a two-stage muffler for vehicle air conditioning and a method for silencing noise, in order to solve the problem of low noise reduction efficiency of existing vehicle air conditioning mufflers.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a vehicle air conditioner two-stage muffler, comprising a housing, a housing cover, a connecting pipe, a muffler pipe, a first muffler cavity, and a second muffler cavity;

[0006] The cover is fixedly connected to the outer shell and located on one side of the cover. The connecting pipe is fixedly connected to the outer shell and located on one side of the outer shell. The silencing pipe is fixedly connected to the connecting pipe and to the outer shell. The first silencing cavity is disposed inside the outer shell, and the second silencing cavity is disposed on the side of the outer shell close to the first silencing cavity.

[0007] The vehicle air conditioner secondary muffler also includes a perforated plate, which is fixedly connected to the outer casing and located inside the outer casing.

[0008] The vehicle air conditioner secondary muffler also includes two sound-absorbing cotton layers, which are fixedly connected to the outer shell and the shell cover, respectively, and are located on the inner sidewalls of the outer shell and the shell cover.

[0009] The vehicle air conditioner secondary muffler also includes a mounting plate, which is fixedly connected to the housing and located on one side of the housing.

[0010] Secondly, a method for secondary noise reduction in a vehicle air conditioner, applied to the secondary muffler of a vehicle air conditioner described in the first aspect, includes the following steps:

[0011] The vehicle air conditioning secondary muffler is installed in the vehicle's preset position using a mounting plate and bolts.

[0012] The vehicle air conditioner uses a secondary muffler to reduce noise.

[0013] This invention discloses a two-stage muffler for vehicle air conditioning, comprising a housing, a housing cover, a connecting pipe, a muffler pipe, a first muffler cavity, and a second muffler cavity. The housing cover is fixedly connected to the housing and located on one side of the housing cover. The connecting pipe is fixedly connected to the housing and located on one side of the housing. The muffler pipe is fixedly connected to the connecting pipe and also fixedly connected to the housing. The first muffler cavity is disposed within the housing, and the second muffler cavity is disposed on the side of the housing closest to the first muffler cavity. With the two stages connected by the pipe, the sound intensity is significantly reduced due to the simultaneous sound absorption and silencing effects of the two muffler cavityes. The sound is further weakened by the sound-absorbing cotton layer, further reducing noise and improving comfort for long-distance drivers during rest, while also preventing disturbance to others. This solves the problem of low silencing efficiency in existing vehicle air conditioning mufflers. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of a vehicle air conditioner secondary muffler provided by the present invention.

[0016] Figure 2 This is a schematic diagram of a vehicle air conditioner secondary muffler without a housing cover, provided by the present invention.

[0017] Figure 3 This is a flowchart of a method for noise reduction in vehicle air conditioning provided by the present invention.

[0018] 1-Outer shell, 2-Shell cover, 3-Connecting pipe, 4-Silencer pipe, 5-First silencer cavity, 6-Second silencer cavity, 7-Mesh plate, 8-Sound-absorbing cotton partition, 9-Mounting plate. Detailed Implementation

[0019] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0020] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] Please see Figures 1 to 2 In a first aspect, the present invention provides a vehicle air conditioner secondary muffler, comprising a housing 1, a housing cover 2, a connecting pipe 3, a muffler pipe 4, a first muffler cavity 5, and a second muffler cavity 6;

[0022] The cover 2 is fixedly connected to the outer shell 1 and is located on one side of the cover 2. The connecting pipe 3 is fixedly connected to the outer shell 1 and is located on one side of the outer shell 1. The silencing pipe 4 is fixedly connected to the connecting pipe 3 and is also fixedly connected to the outer shell 1. The first silencing cavity 5 is disposed inside the outer shell 1. The second silencing cavity 6 is disposed on the side of the outer shell 1 near the first silencing cavity 5.

[0023] In this embodiment, the system includes an outer shell 1, a cover 2, a connecting pipe 3, a silencer pipe 4, a first silencer cavity 5, and a second silencer cavity 6. The cover 2 is fixedly connected to the outer shell 1 and located on one side of the cover 2. The connecting pipe 3 is fixedly connected to the outer shell 1 and located on one side of the outer shell 1. The silencer pipe 4 is fixedly connected to the connecting pipe 3 and to the outer shell 1. The first silencer cavity 5 is disposed inside the outer shell 1, and the second silencer cavity 6 is disposed on the side of the outer shell 1 closest to the first silencer cavity 5. The outer shell can be closed by the cover 2. The two-stage silencer is connected by a pipe. Under the simultaneous sound absorption and silencing effect of the two silencer cavities, the sound intensity is greatly reduced. Finally, the sound is further weakened by the sound-absorbing cotton layer, further reducing noise. This improves the comfort of long-distance drivers during rest and avoids disturbing others, thus solving the problem of low silencing efficiency in existing vehicle air conditioning silencers.

[0024] Furthermore, the vehicle air conditioner secondary muffler also includes a perforated plate 7, which is fixedly connected to the outer casing 1 and located inside the outer casing 1.

[0025] In this embodiment, the space inside the outer shell 1 can be separated by the perforated plate 7, thereby reducing the noise of the vehicle air conditioner.

[0026] Furthermore, the vehicle air conditioner secondary muffler also includes two sound-absorbing cotton layers 8, which are fixedly connected to the outer shell 1 and the shell cover 2 respectively, and are located on the inner sidewalls of the outer shell 1 and the shell cover 2.

[0027] In this embodiment, noise can be reduced by two sound-absorbing cotton layers 8 to prevent excessive noise from the vehicle air conditioner.

[0028] Furthermore, the vehicle air conditioner secondary muffler also includes a mounting plate 9, which is fixedly connected to the housing 1 and located on one side of the housing 1.

[0029] In this embodiment, the housing 1 can be installed at a preset position on the vehicle via the mounting plate 9.

[0030] The system includes an outer shell 1, a cover 2, a connecting pipe 3, a silencer pipe 4, a first silencer cavity 5, and a second silencer cavity 6. The cover 2 is fixedly connected to the outer shell 1 and located on one side of the cover 2. The connecting pipe 3 is fixedly connected to the outer shell 1 and located on one side of the outer shell 1. The silencer pipe 4 is fixedly connected to the connecting pipe 3 and also fixedly connected to the outer shell 1. The first silencer cavity 5 is located inside the outer shell 1, and the second silencer cavity 6 is located on the side of the outer shell 1 closest to the first silencer cavity 5. The two-stage silencer, with pipes connecting the front and rear sections, significantly reduces sound intensity due to the simultaneous sound absorption and silencing effects of the two silencer cavities. The sound is further weakened by the sound-absorbing cotton layer, further reducing noise and improving comfort for long-distance drivers during rest, while also preventing disturbance to others. This solves the problem of low silencing efficiency in existing vehicle air conditioning silencers.

[0031] Beneficial effects:

[0032] I. The vehicle air conditioner two-stage muffler provided by the present invention has a significant reduction in sound intensity due to the simultaneous sound absorption and sound attenuation of the two sound attenuation chambers. Finally, the sound is further weakened by the sound attenuation cotton partition, and the noise is reduced again.

[0033] II. The vehicle air conditioning two-stage muffler provided by this invention improves the comfort of long-distance drivers when they rest, and also avoids disturbing others.

[0034] Please see Figure 3Secondly, a method for secondary noise reduction in vehicle air conditioning, applied to the secondary noise reduction device for vehicle air conditioning described in the first aspect, includes the following steps:

[0035] S1 uses mounting plate 9 and bolts to install the vehicle air conditioner secondary muffler in the preset position on the vehicle.

[0036] Specifically, the housing 1 is installed on a predetermined position on the vehicle via the mounting plate 9.

[0037] S2 uses the vehicle air conditioner's secondary muffler to reduce noise.

[0038] Specifically, the vehicle air conditioner is silenced through the connecting pipe 3, the silencer pipe 4, the first silencer cavity 5, and the second silencer cavity 6.

[0039] The above description is merely a preferred embodiment of a vehicle air conditioner secondary muffler and muffler method according to the present invention. Of course, it should not be construed as limiting the scope of the present invention. Those skilled in the art can understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A two-stage muffler for vehicle air conditioning, characterized in that, It includes an outer shell, a cover, a connecting pipe, a silencer pipe, a first silencer cavity, and a second silencer cavity; The cover is fixedly connected to the outer shell and located on one side of the cover. The connecting pipe is fixedly connected to the outer shell and located on one side of the outer shell. The silencing pipe is fixedly connected to the connecting pipe and to the outer shell. The first silencing cavity is disposed inside the outer shell, and the second silencing cavity is disposed on the side of the outer shell close to the first silencing cavity.

2. The vehicle air conditioning two-stage muffler as described in claim 1, characterized in that, The vehicle air conditioner secondary muffler also includes a perforated plate, which is fixedly connected to the housing and located inside the housing.

3. The vehicle air conditioning secondary muffler as described in claim 2, characterized in that, The vehicle air conditioner secondary muffler also includes two sound-absorbing cotton partitions, which are fixedly connected to the outer shell and the shell cover, respectively, and are located on the inner sidewalls of the outer shell and the shell cover.

4. A vehicle air conditioning secondary muffler as described in claim 3, characterized in that, The vehicle air conditioner secondary muffler also includes a mounting plate, which is fixedly connected to the housing and located on one side of the housing.

5. A method for secondary noise reduction in a vehicle air conditioner, applied to a secondary noise reduction device for a vehicle air conditioner as described in any one of claims 1-4, characterized in that, Includes the following steps: The vehicle air conditioning secondary muffler is installed in the vehicle's preset position using a mounting plate and bolts. The vehicle air conditioner uses a secondary muffler to reduce noise.

Images