Silencer of refrigeration air conditioner

Abstract

The utility model relates to the technical field of air conditioner noise reduction, in particular to a refrigeration air conditioner silencer which comprises a shell, an air inlet pipe and an air outlet pipe are arranged at the two ends of the shell respectively, and one end of the air inlet pipe and one end of the air outlet pipe are both located in a cavity of the shell. A plurality of vent holes are formed in the side walls of the ends, located in the cavity of the shell, of the air inlet pipe and the air outlet pipe, and a first partition plate and a second partition plate are fixedly connected into the cavity of the shell; the first partition plate and the second partition plate sequentially divide the cavity of the shell into a first anechoic chamber, a second anechoic chamber and a third anechoic chamber from the air inlet end to the air outlet end, and the first partition plate is provided with a plurality of first ventilation flow channels communicating with the first anechoic chamber and the second anechoic chamber. The second partition plate is provided with a plurality of second ventilation flow channels communicating with the second anechoic chamber and the third anechoic chamber. According to the utility model, sound waves are mutually counteracted for multiple times in the silencer, so that the noise reduction is realized, and the noise reduction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning noise reduction, and more specifically to a refrigeration air-conditioning muffler. Background Art

[0002] Mufflers are devices that use the principles of sound absorption, reflection, interference, etc. to reduce airflow noise in ventilation and air conditioning systems. According to different muffler principles, they can be divided into resistive, reactive, resonant, and composite types. Household air conditioners are a type of air conditioner that is used in large quantities, and their mufflers are generally installed in the pipelines of the outdoor compressor to reduce noise.

[0003] Existing silencers used for air conditioning resonance noise reduction have certain limitations. Most of them simply use sound-absorbing materials such as silencer cotton to achieve noise reduction. The noise reduction effect is not good enough and it is difficult to meet the noise reduction needs, which needs further improvement. Utility Model Content

[0004] The utility model aims to provide a refrigeration air-conditioning muffler, which improves the noise reduction effect.

[0005] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A refrigeration and air conditioning silencer comprises a shell, wherein an air inlet pipe and an air outlet pipe are respectively arranged at two ends of the shell, one end of the air inlet pipe and the air outlet pipe are both located in the cavity of the shell, and a plurality of air vents are provided on the side walls of one end of the air inlet pipe and the air outlet pipe located in the cavity of the shell, a first partition plate and a second partition plate are fixedly connected in the cavity of the shell, the first partition plate and the second partition plate divide the cavity of the shell into a first muffler chamber, a second muffler chamber and a third muffler chamber in sequence from the air inlet end to the air outlet end, a plurality of first ventilation flow channels connecting the first muffler chamber and the second muffler chamber are provided on the first partition plate, and a plurality of second ventilation flow channels connecting the second muffler chamber and the third muffler chamber are provided on the second partition plate.

[0007] Furthermore, the first ventilation flow channel is an S-shaped structure, an air inlet of the first ventilation flow channel is located in the first muffler chamber, and an air outlet of the first ventilation flow channel is located in the second muffler chamber.

[0008] Furthermore, the second ventilation flow channel is an S-shaped structure, an air inlet of the second ventilation flow channel is located in the second muffler chamber, and an air outlet of the second ventilation flow channel is located in the third muffler chamber.

[0009] Furthermore, the air inlet of the second ventilation flow channel is staggered with the air outlet of the first ventilation flow channel.

[0010] Furthermore, sound-absorbing cotton is arranged on the inner cavity side wall of the shell.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] When the gas enters the first muffler chamber through the vent hole of the air inlet pipe, the sound wave hits the shell and then partially bends back, thereby offsetting the sound wave coming out of the vent hole; when the sound wave in the third muffler chamber enters the outlet pipe through the vent hole, the sound waves offset each other in the outlet pipe; the utility model achieves noise reduction by making the sound waves offset each other multiple times in the muffler, thereby improving the noise reduction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 It is a partial structural schematic diagram of the utility model.

[0016] 1. Shell; 101. First muffler chamber; 102. Second muffler chamber; 103. Third muffler chamber; 2. Air inlet pipe; 201. Air vent; 3. Air outlet pipe; 4. First partition plate; 401. First ventilation flow channel; 5. Second partition plate; 501. Second ventilation flow channel. DETAILED DESCRIPTION

[0017] like Figures 1 to 3 As shown, a refrigeration and air conditioning muffler comprises a shell 1, wherein an air inlet pipe 2 and an air outlet pipe 3 are respectively arranged at two ends of the shell 1, one end of the air inlet pipe 2 and the air outlet pipe 3 are both located in the cavity of the shell 1, and a plurality of air vents 201 are provided on the side walls of one end of the air inlet pipe 2 and the air outlet pipe 3 located in the cavity of the shell 1, and a first partition plate 4 and a second partition plate 5 are fixedly connected in the cavity of the shell 1, and the first partition plate 4 and the second partition plate 5 divide the cavity of the shell 1 from the air inlet end to the air outlet end into a first muffler chamber 101, a second muffler chamber 102 and a third muffler chamber 103 in sequence, the first partition plate 4 is provided with a plurality of first ventilation flow channels 401 connecting the first muffler chamber 101 and the second muffler chamber 102, and the second partition plate 5 is provided with a plurality of second ventilation flow channels 501 connecting the second muffler chamber 102 and the third muffler chamber 103.

[0018] The first ventilation flow channel 401 is an S-shaped structure. The air inlet of the first ventilation flow channel 401 is located in the first muffler chamber 101 , and the air outlet of the first ventilation flow channel 401 is located in the second muffler chamber 102 .

[0019] The second ventilation flow channel 501 is an S-shaped structure. The air inlet of the second ventilation flow channel 501 is located in the second muffler chamber 102 , and the air outlet of the second ventilation flow channel 501 is located in the third muffler chamber 103 .

[0020] The air inlet of the second ventilation flow channel 501 and the air outlet of the first ventilation flow channel 401 are arranged in a staggered manner.

[0021] Sound-absorbing cotton is arranged on the inner cavity side wall of the shell 1.

[0022] Working principle:

[0023] When the gas enters the first muffler chamber 101 through the vent 201 of the air inlet pipe 2, the sound wave hits the shell 1 and then partially bends back, thereby canceling out the sound wave coming out of the vent 201; the sound wave passes through the first air flow channel 401 and the second air flow channel 501 in sequence from the first muffler chamber 101 into the third muffler chamber 103, and energy loss occurs; when the sound wave in the third muffler chamber 103 enters the outlet pipe 3 through the vent 201, the sound waves cancel each other out in the outlet pipe 3; the utility model achieves noise reduction by making the sound waves cancel each other out multiple times in the muffler, thereby improving the noise reduction effect.

[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A refrigeration and air conditioning muffler, characterized in that: The invention comprises a shell (1), wherein an air inlet pipe (2) and an air outlet pipe (3) are respectively arranged at two ends of the shell (1), one end of the air inlet pipe (2) and the air outlet pipe (3) are both located in the cavity of the shell (1), a plurality of air vents (201) are provided on the side walls of one end of the air inlet pipe (2) and the air outlet pipe (3) located in the cavity of the shell (1), a first partition plate (4) and a second partition plate (5) are fixedly connected in the cavity of the shell (1), and the first partition plate (4) and the ... 5) The cavity of the shell (1) is divided into a first muffler chamber (101), a second muffler chamber (102) and a third muffler chamber (103) in sequence from the air inlet end to the air outlet end; a plurality of first air passages (401) connecting the first muffler chamber (101) and the second muffler chamber (102) are provided on the first partition plate (4); and a plurality of second air passages (501) connecting the second muffler chamber (102) and the third muffler chamber (103) are provided on the second partition plate (5).

2. The refrigeration and air conditioning muffler according to claim 1, characterized in that: The first ventilation flow channel (401) is an S-shaped structure, an air inlet of the first ventilation flow channel (401) is located in the first muffler chamber (101), and an air outlet of the first ventilation flow channel (401) is located in the second muffler chamber (102).

3. The refrigeration and air conditioning muffler according to claim 2, characterized in that: The second ventilation flow channel (501) is an S-shaped structure, an air inlet of the second ventilation flow channel (501) is located in the second muffler chamber (102), and an air outlet of the second ventilation flow channel (501) is located in the third muffler chamber (103).

4. The refrigeration and air conditioning muffler according to claim 3, characterized in that: The air inlet of the second ventilation flow channel (501) and the air outlet of the first ventilation flow channel (401) are arranged in a staggered manner.

5. The refrigeration and air conditioning muffler according to claim 1, characterized in that: Sound-absorbing cotton is arranged on the inner cavity side wall of the shell (1).

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