Multi-cavity suction silencer for refrigerator compressor

Abstract

The utility model discloses a multi-cavity suction silencer for a refrigerator compressor, and belongs to the technical field of refrigeration compressors. A multi-cavity suction silencer for a refrigerator compressor comprises a silencer shell, an air inlet pipe and an exhaust pipe are arranged on the silencer shell, a plurality of partition plates are arranged in the silencer shell, and the inner side of the silencer shell is divided into five cavities by the partition plates; according to the noise reduction principle of the expansion cavity and the resonant cavity, through the elaborately-designed five cavities including the first cavity, the second cavity, the third cavity, the fourth cavity, the fifth cavity, the communicating pipes and the inner inserting pipes among the five cavities, the noise reduction capacity of the middle-low frequency band is guaranteed, the noise reduction frequency band is remarkably widened, and the noise reduction efficiency is improved. By means of the design, sound waves are subjected to more complex reflection, interference and resonance processes in the silencer, so that effective control over broadband noise is achieved, and compared with a traditional single cavity or a simple partition plate structure, the silencer achieves qualitative leap in the noise reduction frequency band.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration compressors, in particular to a multi-chamber suction muffler for refrigerator compressors. Background Art

[0002] The refrigerator compressor, as the "heart" of the refrigerator, is the most important component in the entire refrigeration cycle. The noise level of the refrigerator compressor will directly affect the noise level of the refrigerator to a large extent. With the rapid development of human economy and technology, low-noise refrigerators have gradually become the darling of the new era refrigeration equipment market. How to manufacture low-noise and high-efficiency refrigerator compressors has gradually become the research focus and development direction of refrigerator compressors.

[0003] The noise sources of refrigerator compressors can be divided into three types according to their types: mechanical noise, airflow noise and electromagnetic noise. Mechanical noise is mainly caused by reciprocating and rotational inertia forces. Impact noise of pistons and valve plates and friction and resonance noise of some components are also one of the mechanical noise sources; airflow noise is caused by the vibration of the cavity or gas during the suction and exhaust of refrigerant in the compressor. Intake pulsation noise is the main noise source of compressor airflow noise.

[0004] However, most existing suction silencers have a narrow silencing frequency band, which makes it difficult to effectively cover the broadband noise generated during the operation of the compressor. This not only limits the noise reduction effect of the silencer, but also affects the overall performance and user experience of the refrigerator compressor. Specifically, traditional suction silencers often use a single chamber or a simple partition structure, which results in a limited propagation path of sound waves in the silencer and unsatisfactory silencing effect. Utility Model Content

[0005] The purpose of the utility model is to provide a multi-chamber suction muffler for a refrigerator compressor in order to solve the problems existing in the prior art.

[0006] To achieve the above-mentioned object, the utility model adopts the following technical solution: a multi-chamber suction muffler for a refrigerator compressor, comprising a muffler shell, an air intake pipe and an exhaust pipe provided on the muffler shell, a plurality of partitions provided in the muffler shell, the plurality of partitions dividing the inner side of the muffler shell into five chambers, the five chambers being distributed sequentially from the air intake pipe to the exhaust pipe, and the five chambers being a first chamber connected to the air intake pipe, a second chamber, a third chamber, a fourth chamber and a fifth chamber connected to the exhaust pipe, the first chamber, the fourth chamber and the fifth chamber being expansion chambers, the second chamber and the third chamber being resonance chambers, a connecting pipe located inside the first chamber, the second chamber and the third chamber being provided on the inner side of the muffler shell, one end of the connecting pipe being connected to the fourth chamber, an inner side of the fifth chamber being provided with an inner tube connected to the fourth chamber, and a muffler slit being opened on the connecting pipe of the second chamber and the third chamber respectively.

[0007] By adopting the above technical solution, the muffler achieves effective control and reduction of the compressor suction noise by cleverly designing multiple chambers and connecting pipe structures, and rationally arranging components such as silencer slits and inner pipes.

[0008] Optionally, the muffler shell includes a docking shell and a mounting shell spliced ​​with the docking shell, and the docking shell and the mounting shell form a box structure after being assembled.

[0009] By adopting the above technical solution, the box structure provides a solid and sealed sound-absorbing environment to prevent noise leakage. At the same time, the design of the box structure is also easy to assemble and disassemble, making it convenient to maintain and replace internal components.

[0010] Optionally, a docking groove is provided at one end of the docking shell close to the mounting shell, and a sealing strip is provided on the inner side of the docking groove.

[0011] By adopting the above technical solution, the design of the docking groove and the sealing strip ensures a tight fit between the docking shell and the installation shell, preventing gas leakage and noise leakage. The design of the sealing strip can also improve the overall sealing performance and further enhance the sound insulation effect.

[0012] Optionally, the partition includes a transverse partition and a pair of longitudinal partitions connected to the transverse partition. The partition is arranged independently, or is integrally molded with the muffler shell, or is integrally molded with the connecting pipe.

[0013] By adopting the above technical solution, the partition serves as a barrier to separate different chambers, ensuring the independence of each chamber. At the same time, the design of the partition can also improve the structural strength and stability of the muffler shell. The one-piece molded partition can also reduce errors and air leakage during the assembly process, thereby improving the overall sound insulation effect.

[0014] Optionally, a docking hole and a connecting hole are provided on the side wall of the fourth chamber, the docking hole is connected to the connecting pipe, and the connecting hole is connected to the inner tube.

[0015] By adopting the above technical solution, the docking hole and the connecting hole ensure the tight connection between the connecting tube and the inner tube and the fourth chamber. This design not only improves the overall sealing performance, but also enables the airflow to flow smoothly between the chambers, avoiding additional noise.

[0016] Optionally, the inner tube may be square, cylindrical or annular, and the inner tube may be distributed vertically, obliquely or horizontally inside the fifth cavity.

[0017] By adopting the above technical solution, the inner tube serves as part of the airflow channel. The design of the inner tube can change the flow path and speed of the airflow, thereby further reducing the generation and propagation of noise. At the same time, the different shapes and distribution methods of the inner tube can also be adjusted as needed to optimize the sound insulation effect.

[0018] Optionally, the number of the silencer slits is 2-10, and the silencer slits are respectively located on the connecting pipes of the second chamber and the third chamber, and the shape of the silencer slits is circular, elliptical or irregular.

[0019] By adopting the above technical solution, the number and shape of the silencer slits can be adjusted as needed to optimize the resonance frequency and the silencer effect. By adjusting the parameters of the silencer slits, effective silencer of noises of different frequencies can be achieved.

[0020] Optionally, the connecting pipe and the air intake pipe have a certain distance therebetween, which is 10mm-20mm, or the connecting pipe is set to be inclined, and a certain offset angle is maintained between the connecting pipe and the air intake pipe, which is 5°-15°.

[0021] By adopting the above technical solution and the design between the connecting pipe and the air intake pipe, the flow path of the airflow and the noise reduction effect can be optimized.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This patent uses the noise reduction principle of the expansion cavity and the resonance cavity. Through the carefully designed five chambers (the first to the fifth chamber) and the connecting pipe and the inner tube structure between them, it not only ensures the sound reduction ability in the medium and low frequency bands, but also significantly broadens the sound reduction frequency band. This design makes the sound waves undergo more complex reflection, interference and resonance processes inside the muffler, thereby achieving effective control of broadband noise. Compared with the traditional single chamber or simple baffle structure, the muffler of this patent has achieved a qualitative leap in the noise reduction frequency band; 2. The muffler shell is assembled by the docking shell and the installation shell to form a box structure, which is not only convenient for assembly and maintenance, but also ensures the compactness of the structure. In addition, the baffle can be independently The muffler shell and the connecting pipe are arranged vertically or integrally formed with the muffler shell and the connecting pipe, which improves the manufacturing efficiency and precision. At the same time, the design of the inner tube is flexible and diverse (can be square, cylindrical or annular, and can be distributed vertically, obliquely or horizontally), and can be customized according to the suction noise characteristics of different refrigerator compressors to maximize the noise reduction effect. This design makes the muffler of this patent applicable to various models of compressors without space restrictions; 3. The docking shell and the mounting shell are tightly matched by docking grooves and sealing strips, which effectively prevents gas leakage and noise leakage. This superior sealing performance not only improves the overall performance of the muffler, but also ensures the stable operation and long life of the refrigerator compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the suction muffler of the utility model;

[0025] Figure 2 This is a schematic diagram of the cross-sectional structure of the installation shell of the utility model;

[0026] Figure 3 This is a schematic diagram of the cross-sectional structure of the docking shell of the present invention.

[0027] In the figure: 1. Muffler shell; 101. Docking shell; 1011. Docking groove; 102. Mounting shell; 2. Partition; 3. First chamber; 4. Second chamber; 5. Third chamber; 6. Fourth chamber; 601. Docking hole; 602. Connecting hole; 7. Fifth chamber; 8. Connecting pipe; 9. Inner tube; 10. Muffler slit; 11. Inlet pipe; 12. Exhaust pipe. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0030] like Figure 1 —3, the specific scheme of the embodiment is as follows: a multi-chamber suction muffler for a refrigerator compressor, including a muffler shell 1, the muffler shell 1 is the main structure of the suction muffler, responsible for accommodating multiple chambers and connecting pipes inside, providing a closed environment for sound absorption and reflection, and forming a strong and sealed box structure by splicing with the docking shell 101 and the installation shell 102 to prevent gas leakage and noise leakage, and provide sufficient space to arrange multiple chambers and connecting pipes to achieve efficient sound elimination effect, the muffler shell 1 includes a docking shell 101, and the docking shell 1 01 spliced ​​mounting shell 102, the docking shell 101 and the mounting shell 102 are assembled into a box structure, the docking shell 101 is provided with a docking groove 1011 at one end close to the mounting shell 102, and a sealing strip is provided on the inner side of the docking groove 1011. The docking shell 101 and the mounting shell 102 are two main components of the muffler housing 1, and a complete muffler structure is formed by splicing. The docking groove 1011 and the sealing strip on the docking shell 101 ensure a close fit between the mounting shell 102 and the docking shell 101, thereby improving the overall sealing performance. The splicing method is convenient for assembly;

[0031] The muffler shell 1 is provided with an air intake pipe 11 and an exhaust pipe 12, which are respectively located on the docking shell 101, and the air intake pipe 11 is connected to the first chamber 3, and the exhaust pipe 12 is connected to the fifth chamber 7. The air intake pipe 11 is responsible for introducing the airflow generated by the compressor into the muffler, and the exhaust pipe 12 discharges the airflow after silencer treatment. The connection between the air intake pipe 11 and the first chamber 3 ensures that the airflow can smoothly enter the muffler and start the silencer process. The connection between the exhaust pipe 12 and the fifth chamber 7 ensures that the airflow after multiple reflections and silencer treatment can be discharged smoothly without causing additional noise.

[0032] A plurality of partitions 2 are provided in the muffler housing 1. When the docking shell 101 and the mounting shell 102 are assembled, the plurality of partitions 2 are docked and installed with the docking grooves 1011. The partitions 2 are used to divide the interior of the muffler housing 1 into a plurality of independent chambers, each chamber having different sound-absorbing characteristics. The partitions 2 include a transverse partition 2 and a pair of longitudinal partitions 2 connected to the transverse partition 2. The partitions 2 can be arranged independently, or can be integrally formed with the muffler housing 1, or integrally formed with the connecting pipe 8, thereby improving the stability of the structure and the sound-absorbing effect.

[0033] Several partitions 2 divide the inner side of the muffler shell 1 into five chambers, and the five chambers are distributed in sequence from the intake pipe 11 to the exhaust pipe 12, and the five chambers are respectively a first chamber 3 connected to the intake pipe 11, a second chamber 4, a third chamber 5, a fourth chamber 6 and a fifth chamber 7 connected to the exhaust pipe 12. The five chambers have different sound-absorbing characteristics and jointly realize the sound-absorbing treatment of the airflow. The first chamber 3, the fourth chamber 6 and the fifth chamber 7 are respectively expansion chambers, and the expansion chambers reduce noise by changing the flow rate and direction of the airflow. The second chamber 4 and the third chamber 5 are respectively resonance chambers, and the resonance chamber cooperates with the sound-absorbing slit 10 on the connecting pipe 8 to form a Helmholtz resonance chamber to resonate and silence noise of a specific frequency.

[0034] The inner side of the muffler housing 1 is provided with a connecting pipe 8 located inside the first chamber 3, the second chamber 4 and the third chamber 5. The connecting pipe 8 is used to connect different chambers so that the airflow can flow and be transmitted between the chambers. One end of the connecting pipe 8 is connected to the fourth chamber 6. The side wall of the fourth chamber 6 is provided with a docking hole 601 and a connecting hole 602. The docking hole 601 is connected to the connecting pipe 8, and the docking hole 601 is connected to the connecting pipe 8 to ensure smooth flow of gas. The connecting hole 602 is connected to the inner tube 9, and the connecting hole 602 is connected to the inner tube 9. The fourth chamber 6 and the fifth chamber 7 can be connected. The design of the connecting pipe 8 allows the airflow to flow freely between the first, second, third chambers 5 and the fourth chamber 6, thereby realizing multi-stage noise reduction treatment of the airflow. The connecting pipe 8 and the air intake pipe 11 have a certain spacing, which is 10mm-20mm, or the connecting pipe 8 is set to an inclined shape, and a certain offset angle is maintained between the connecting pipe 8 and the air intake pipe 11, which is 5°-15°. The shape of the connecting pipe 8 can be designed according to its actual generation requirements, thereby optimizing the flow path of the airflow and the noise reduction effect;

[0035] The inner side of the fifth chamber 7 is provided with an inner tube 9 connected to the fourth chamber 6. The inner tube 9 is distributed inside the fifth chamber 7 to change the gas flow path, improve the sound absorption capability in the medium and low frequency bands, and widen the sound absorption frequency band. The inner tube 9 can be square, cylindrical or annular. The inner tube 9 can be distributed vertically, obliquely or horizontally on the inner side of the fifth cavity. By designing the inner tube 9 at a suitable position, not only the sound absorption capability in the medium and low frequencies can be guaranteed, but also the sound absorption frequency band of this multi-chamber silencer can be widened. The design of the inner tube 9 can flexibly adjust the flow path and speed of the airflow, thereby improving the sound absorption effect and widening the sound absorption frequency band.

[0036] The connecting pipe 8 is provided with a silencer slit 10, and the number of the silencer slits 10 is 2-10. The silencer slits 10 are respectively located on the connecting pipe 8 of the second chamber 4 and the third chamber 5. The shape of the silencer slit 10 is circular, elliptical or irregular, and the irregular shape includes square and polygonal. The shape of the silencer slit 10 can be designed according to actual needs. The silencer slit 10 cooperates with the second chamber 4 and the third chamber 5 to form a Helmholtz resonance cavity to resonate and silence noise of a specific frequency. By adjusting the parameters of the silencer slit 10, effective silencing of noise of different frequencies can be achieved, thereby improving the overall silencing performance.

[0037] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-chamber suction muffler for a refrigerator compressor, comprising a muffler housing, an air intake pipe and an exhaust pipe being provided on the muffler housing, wherein: The muffler shell is provided with a plurality of partitions, and the partitions divide the inner side of the muffler shell into five chambers. The five chambers are distributed in sequence from the intake pipe to the exhaust pipe, and the five chambers are respectively a first chamber connected to the intake pipe, a second chamber, a third chamber, a fourth chamber and a fifth chamber connected to the exhaust pipe. The first chamber, the fourth chamber and the fifth chamber are respectively expansion chambers, and the second chamber and the third chamber are respectively resonance chambers. The inner side of the muffler shell is provided with a connecting pipe located on the inner side of the first chamber, the second chamber and the third chamber, one end of the connecting pipe is connected to the fourth chamber, and the inner side of the fifth chamber is provided with an inner tube connected to the fourth chamber. The connecting pipe is provided with a silencer slit located on the connecting pipe of the second chamber and the third chamber respectively.

2. The multi-chamber suction muffler for a refrigerator compressor according to claim 1, characterized in that: The muffler housing includes a docking shell and a mounting shell spliced ​​with the docking shell. The docking shell and the mounting shell form a box structure after being assembled.

3. The multi-chamber suction muffler for a refrigerator compressor according to claim 2, characterized in that: A docking groove is provided at one end of the docking shell close to the installation shell, and a sealing strip is provided on the inner side of the docking groove.

4. The multi-chamber suction muffler for a refrigerator compressor according to claim 1, characterized in that: The partition includes a transverse partition and a pair of longitudinal partitions connected to the transverse partition. The partition is arranged independently, or is integrally formed with the muffler shell, or is integrally formed with the connecting pipe.

5. The multi-chamber suction muffler for a refrigerator compressor according to claim 1, characterized in that: A docking hole and a connecting hole are provided on the side wall of the fourth chamber. The docking hole is connected to the communicating pipe, and the connecting hole is connected to the inner inserting pipe.

6. The multi-chamber suction muffler for a refrigerator compressor according to claim 1, characterized in that: The inner insert tube may be square, cylindrical or annular, and may be distributed vertically, obliquely or horizontally inside the fifth cavity.

7. The multi-chamber suction muffler for a refrigerator compressor according to claim 1, characterized in that: The number of the silencing slits is 2-10, and the silencing slits are respectively located on the connecting pipes of the second chamber and the third chamber. The shape of the silencing slits is circular, elliptical or irregular.

8. The multi-chamber suction muffler for a refrigerator compressor according to claim 2, characterized in that: There is a certain distance between the connecting pipe and the air intake pipe, which is 10mm-20mm, or the connecting pipe is set to be inclined, and a certain offset angle is maintained between the connecting pipe and the air intake pipe, which is 5°-15°.

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