A right-angle three-chamber intake muffler and compressor

Abstract

This utility model discloses a right-angle three-chamber intake muffler and compressor, belonging to the field of compressor technology. It includes a housing, within which a first partition and a second partition are arranged. The first partition is perpendicular to the second partition, dividing the interior of the housing into a first chamber, a second chamber, and a third chamber. The second and third chambers are arranged longitudinally, while the first chamber is arranged horizontally. Each of the first, second, and third chambers is equipped with a flow guiding structure. This invention solves the problems of gaps and leakage in the internal flow guiding pipes of the muffler, as well as the problem of large local pressure loss, reducing internal pressure loss, improving efficiency, and simultaneously enhancing the noise reduction effect of the intake muffler on broadband noise.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, specifically relating to a right-angle three-chamber intake muffler and compressor. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Compressor noise primarily originates from casing vibration radiation and internal casing noise. Internal casing noise includes valve plate slapping noise, refrigerant flow noise, structural component friction noise, electromagnetic noise, and structural component vibration noise. Among these, valve plate slapping noise and high-speed refrigerant flow and ejection noise in the cylinder and cylinder head components account for the largest proportions. Because compressor suction is indirect, the intake port of the suction muffler is not directly connected to the casing but rather to the internal cavity of the casing. Valve plate slapping noise, refrigerant ejection noise, and suction pressure pulsation are transmitted through the suction muffler and ultimately output to the internal cavity through its intake port. While the suction muffler reduces some noise and pulsation, it still excites a response within the internal cavity. The internal cavity is a closed structure with acoustic modes. These modes vary with the cavity volume and size, with the first three modes contributing the most, falling within the 630-1000Hz range. Smaller volumes result in higher frequencies. Resonance will occur under the excitation of noise and pulsation, amplifying the noise and producing cavity resonance noise.

[0004] The suction noise of existing refrigerator compressors is a significant source of overall noise, primarily addressed through suction mufflers. Current compressor suction mufflers mainly fall into two structural categories. One type uses an internal serpentine guide tube, where the guide tube and the muffler's outer casing are coaxially aligned, eliminating misalignment and angles, resulting in low pressure loss and flow resistance. However, this requires the internal guide tube to be divided into two parts that are interlocked, leading to large gaps, loosening, poor sealing, and significant leakage, ultimately failing to achieve the designed noise reduction effect and exhibiting inconsistent performance. The other type uses a straight-insertion tube, where the guide tube is entirely straight, not interlocked in two parts. This results in low leakage and a noise reduction effect that closely matches the design. However, angles between different guide tubes create localized pressure losses, leading to high flow resistance and low efficiency. Currently, most mufflers are primarily dual-chamber structures with a limited number of chambers, resulting in fewer noise reduction peaks and unsatisfactory noise reduction effects on broadband noise. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a right-angle three-chamber intake muffler and compressor, which can solve the problems of gaps and leakage in the internal guide pipe of the muffler, as well as the problem of large local pressure loss, reduce internal pressure loss, improve efficiency, and at the same time improve the noise reduction effect of the intake muffler on broadband noise.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A right-angle three-chamber intake silencer includes a housing, in which a first partition and a second partition are disposed. The first partition is perpendicular to the second partition, and the housing is divided into a first chamber, a second chamber, and a third chamber by the first partition and the second partition. The second chamber and the third chamber are arranged longitudinally, and the first chamber is arranged horizontally. A flow guiding structure is provided in each of the first chamber, the second chamber, and the third chamber.

[0007] As a further technical solution, the housing includes a first outer shell and a second outer shell, with one end of the first partition and the second partition connected to the inner wall surface of the first outer shell.

[0008] As a further technical solution, the second housing is provided with a first slot and a second slot, the first slot being perpendicular to the second slot; the first partition is inserted into the first slot, and the second partition is inserted into the second slot.

[0009] As a further technical solution, the flow guiding structure includes a first flow guiding pipe, a second flow guiding pipe, a third flow guiding pipe, and a fourth flow guiding pipe; the first flow guiding pipe is disposed outside the first cavity and is connected to the shell.

[0010] As a further technical solution, one end of the first guide tube is connected to the air inlet, and one end of the first guide tube is connected to the second guide tube; the second guide tube is arranged coaxially with the first guide tube, and a first resonance hole is provided between the first guide tube and the second guide tube.

[0011] As a further technical solution, one end of the second guide tube is located in the first chamber and the other end is located in the second chamber, and the second guide tube connects the first chamber and the second chamber.

[0012] As a further technical solution, the third guide tube is vertically inclined so that the axis of the third guide tube forms an angle with that of the second guide tube, and the third guide tube connects the second chamber and the third chamber.

[0013] As a further technical solution, a fourth guide tube is provided on the second outer shell, the fourth guide tube being arranged in a vertical direction; one end of the fourth guide tube is connected to the air outlet, and the other end of the fourth guide tube is connected to the third chamber.

[0014] As a further technical solution, the two ends of the third guide tube are aligned with the ends of the second guide tube and the fourth guide tube, respectively, and a second resonance hole is provided between the third guide tube and the fourth guide tube.

[0015] A compressor employs a right-angled three-chamber intake muffler, wherein the right-angled three-chamber intake muffler is connected to the compressor's exhaust pipe.

[0016] Compared with the prior art, the advantages and positive effects of this utility model are: This invention utilizes a first and second guide tube arranged coaxially, a third guide tube vertically inclined with its ends precisely aligned with the outlet of the second guide tube and the inlet of the fourth guide tube, and guide tubes with the inlet and outlet of the second chamber close together. This reduces local pressure loss, shortens the refrigerant flow path, and improves the compressor's suction efficiency. Through a right-angled L-shaped three-chamber layout combined with a three-stage series silencing structure—the first chamber achieving primary resonance silencing via the first resonance hole, the second chamber using an expansion structure and a close-fitting inlet and outlet design to shift the silencing peak to lower frequencies, and the third chamber achieving secondary resonance silencing via the second resonance hole—the number of silencing peaks is increased, the silencing frequency band is expanded, especially targeting the resonance frequency band of the shell cavity, improving transmission loss, and effectively covering broadband noise such as valve plate slapping and refrigerant ejection.

[0017] This utility model adopts a split design of the first and second outer shells, with the first and second partitions perpendicularly intersecting on the first outer shell, and the corresponding first and second slots on the second outer shell. After assembly, they are sealed and welded to form a gapless first chamber, second chamber, and third chamber, thereby eliminating the risk of gaps and loosening, avoiding refrigerant leakage, and ensuring the stability of the noise reduction parameters of each chamber. It not only solves the problem of noise reduction effect deviating from the design target due to leakage in traditional silencers, but also improves the product consistency during mass production. Attached Figure Description

[0018] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0019] Figure 1 This is a cross-sectional view of the right-angled three-chamber intake muffler of this utility model. Figure 2 This is a vertical sectional view of the right-angled three-chamber intake silencer of this utility model. Figure 3 This is a first structural diagram of the outer shell of this utility model; Figure 4 This is a second outer shell structure diagram of this utility model; In the diagram: 1-First outer shell, 2-Second outer shell, 3-First chamber, 4-Second chamber, 5-Third chamber, 11-First partition, 12-Second partition, 13-Air inlet, 14-First guide pipe, 15-Second guide pipe, 16-Third guide pipe, 17-First resonance hole, 18-Second resonance hole, 21-First slot, 22-Second slot, 23-Fourth guide pipe, 24-Air outlet. Detailed Implementation It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0020] The suction noise of existing refrigerator compressors is a significant source of overall noise, primarily addressed through suction mufflers. Current compressor suction mufflers mainly fall into two structural categories. One type uses an internal serpentine guide tube, where the guide tube and the muffler's outer casing are coaxially aligned, eliminating misalignment and angles, resulting in low pressure loss and flow resistance. However, this requires the internal guide tube to be divided into two parts that are interlocked, leading to large gaps, loosening, poor sealing, and significant leakage, ultimately failing to achieve the designed noise reduction effect and exhibiting inconsistent performance. The other type uses a straight-insertion tube, where the guide tube is entirely straight, not interlocked in two parts. This results in low leakage and a noise reduction effect that closely matches the design. However, angles between different guide tubes create localized pressure losses, leading to high flow resistance and low efficiency. Currently, most mufflers are primarily dual-chamber structures with a limited number of chambers, resulting in fewer noise reduction peaks and unsatisfactory noise reduction effects on broadband noise.

[0021] Example 1: The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a right-angled three-chamber intake muffler, such as... Figure 1 As shown, the device includes a shell, inside which a first partition 11 and a second partition 12 are disposed. The first partition 11 is disposed perpendicular to the second partition 12. The first partition 11 and the second partition 12 divide the interior of the shell into a first chamber 3, a second chamber 4 and a third chamber 5. The second chamber 4 and the third chamber 5 are arranged longitudinally, and the first chamber 3 is arranged horizontally. A flow guiding structure is disposed in the first chamber 3, the second chamber 4 and the third chamber 5.

[0022] Specifically, by having the first guide pipe 14 and the second guide pipe 15 arranged coaxially, the third guide pipe 16 vertically inclined and precisely aligned at both ends with the outlet of the second guide pipe 15 and the inlet of the fourth guide pipe 23 respectively, and the guide pipes with the inlet and outlet of the second chamber 4 close together, local pressure loss is reduced, the refrigerant flow path is shortened, and the compressor suction efficiency is improved.

[0023] The silencer's internal volume is divided into three independent chambers, arranged sequentially along the airflow path: chamber 3 (first chamber), chamber 4 (second chamber), and chamber 5 (third chamber). Chambers 4 and 5 are arranged longitudinally, while chamber 5 and chamber 3 are arranged horizontally together, forming a right-angled L-shaped layout. This right-angled L-shaped three-chamber layout, combined with a three-stage cascaded silencing structure—chamber 3 achieving primary resonance silencing via the first resonance hole 17; chamber 4 employing an expansion structure and a close-fitting inlet / outlet design to shift the silencing peak to lower frequencies; and chamber 5 achieving secondary resonance silencing via the second resonance hole 18—increases the number of silencing peaks, expands the silencing frequency band, and particularly targets the resonance frequency band of the shell cavity, improving transmission loss and effectively covering broadband noises such as valve plate slapping and refrigerant spraying.

[0024] like Figure 4 As shown, the housing includes a first outer shell 1 and a second outer shell 2. One end of the first partition 11 and the second partition 12 are connected to the inner wall of the first outer shell 1. The second outer shell is provided with a first slot 21 and a second slot 22, with the first slot 21 perpendicular to the second slot 22. The first partition 11 is inserted into the first slot 21, and the second partition 12 is inserted into the second slot 22.

[0025] Specifically, by using a split design of the first outer shell 1 and the second outer shell 2, and with the first partition 11 and the second partition 12 that intersect vertically on the first outer shell 1, and the corresponding matching first slot 21 and second slot 22 on the second outer shell 2, the assembly is sealed and welded to form a gapless first chamber 3, second chamber 4, and third chamber 5. This eliminates the risk of gaps and loosening, avoids refrigerant leakage, and ensures stable noise reduction parameters for each chamber. This not only solves the problem of noise reduction effect deviating from the design target due to leakage in traditional silencers, but also improves product consistency during mass production.

[0026] like Figure 2 and Figure 3 As shown, the flow guiding structure includes a first flow guiding pipe 14, a second flow guiding pipe 15, a third flow guiding pipe 16, and a fourth flow guiding pipe 23; the first flow guiding pipe 14 is disposed outside the first chamber 3 and is connected to the shell.

[0027] One end of the first guide pipe 14 is connected to the air inlet 13, and the other end of the first guide pipe 14 is connected to the second guide pipe 15. The second guide pipe 15 is coaxially arranged with the first guide pipe 14, and a first resonance hole 17 is provided between the first guide pipe 14 and the second guide pipe 15. One end of the second guide pipe 15 is located in the first chamber 3, and the other end is located in the second chamber 4, connecting the first chamber 3 and the second chamber 4. The third guide pipe 16 is vertically inclined, forming an angle with the axis of the second guide pipe 15, connecting the second chamber 4 and the third chamber 5. A fourth guide pipe 23 is provided on the second outer shell, and the fourth guide pipe 23 is arranged vertically. One end of the fourth guide pipe 23 is connected to the air outlet 24, and the other end of the fourth guide pipe 23 is connected to the third chamber 5.

[0028] Specifically, the first outer shell 1 is designed with a first guide pipe 14, a second guide pipe 15, and a third guide pipe 16 sequentially, starting from the air inlet 13. The first guide pipe 14 is arranged horizontally, connecting the air inlet 13 and the first chamber 3. The first guide pipe 14 has no insertion part in the first chamber 3. The second guide pipe 15 is arranged coaxially with the first guide pipe 14. A first resonance hole 17 is designed between the second guide pipe 15 and the first guide pipe 14 to form a resonant silencing cavity.

[0029] The second guide tube 15 connects the first chamber 3 and the second chamber 4. The second guide tube 15 is inserted into the second chamber 4 to a certain depth. The third guide tube 16 is arranged vertically at an angle, forming a 90° angle with the second guide tube 15. The third guide tube 16 connects the second chamber 4 and the third chamber 5. The second chamber 4 forms an expansion silencer. The air inlet and outlet 24 in the second chamber 4 are close together to reduce pressure loss.

[0030] A fourth guide tube 23 is designed on the second outer shell, arranged vertically, connecting the third chamber 5 and the air outlet 24. The fourth guide tube 23 is not inserted into the third chamber 5, while the third guide tube 16 is inserted into the third chamber 5 at a certain distance. The third guide tube 16 is arranged at an angle, with its two ends aligned with the ends of the second guide tube 15 and the fourth guide tube 23, respectively, to reduce pressure loss. A second resonance hole 18 is designed between the third guide tube 16 and the fourth guide tube 23 to form a resonant silencing cavity. The two ends of the third guide tube 16 are aligned with the ends of the second guide tube 15 and the fourth guide tube 23, respectively, and the second resonance hole 18 is provided between the third guide tube 16 and the fourth guide tube 23.

[0031] Specifically, the first resonant hole 17 is located between the first guide pipe 14 and the second guide pipe 15. The first guide pipe 14, the second guide pipe 15, and the first resonant hole 17 work together to form the first resonant silencing cavity. When the refrigerant gas flow carrying mid-to-high frequency noise, including the high-frequency slapping sound of the valve plate and the high-speed turbulence sound of the airflow, it will pass through the first resonant silencing cavity. At this time, the first resonant hole 17 and the corresponding cavity volume will form a specific natural frequency. This natural frequency can resonate with the mid-to-high frequency noise, thereby specifically weakening the noise energy in the mid-to-high frequency range and reducing the transmission of noise in this frequency range to subsequent cavities and the shell cavity.

[0032] The second resonant hole 18 is located between the third guide pipe 16 and the fourth guide pipe 23. The third guide pipe 16, the fourth guide pipe 23, and the second resonant hole 18 work together to form a second resonant anechoic chamber, which is mainly associated with the third chamber 5. It targets the low-frequency noise remaining after treatment in the second chamber 4, which uses an expansion-type anechoic method. The remaining low-frequency noise includes low-frequency pulsating sounds related to the resonance of the shell cavity. The second resonant hole 18 and the third chamber 5 work together to form a natural frequency adapted to the low-frequency range. This natural frequency resonates with the low-frequency noise, thereby consuming the low-frequency noise energy and further enhancing the attenuation effect on low-frequency noise.

[0033] The housing is divided into a first chamber 3, a second chamber 4, and a third chamber 5 by the first partition 11 and the second partition 12. These three chambers are arranged in a right-angled L-shape. The refrigerant airflow flows through these three chambers sequentially. Each chamber employs different silencing mechanisms, such as resonance silencing and expansion silencing, to specifically weaken noise in different frequency bands, forming a graded filtration effect and thus covering a wider noise frequency range. Through the coaxial arrangement of the first guide pipe 14 and the second guide pipe 15, the alignment design of the inlet and outlet of each guide pipe, the inclined design of the third guide pipe 16, and the close fit design of the inlet and outlet of the second chamber 4, the backflow and impact of the airflow in the chamber are reduced, pressure loss is reduced, and the refrigerant can flow smoothly. This achieves a good silencing effect while ensuring the compressor's suction efficiency.

[0034] Example 2: A compressor employs a right-angled three-chamber intake muffler, wherein the right-angled three-chamber intake muffler is connected to the compressor's exhaust pipe.

[0035] Specifically, the compressor is a reciprocating fixed-frequency compressor for refrigerators. Its body includes a sealed casing, an internal cylinder assembly, an intake valve, an exhaust valve, and an exhaust pipe. The exhaust pipe is the core channel for the discharge of high-pressure refrigerant inside the compressor. One end is connected to the exhaust port of the cylinder assembly, and the other end extends to the outside of the sealed casing. A welding interface for connecting a muffler is reserved on the pipe section outside the casing.

[0036] When the compressor is running, the high-pressure refrigerant gas compressed in the cylinder assembly (carrying valve plate knocking noise and high-speed airflow ejection noise) enters the compressor's exhaust pipe through the exhaust valve, and then flows into the right-angle three-chamber intake muffler: The refrigerant first enters the first guide pipe 14 through the silencer inlet 13, and weakens the mid-to-high frequency noise through the resonance effect of the first resonance hole 17 and the first chamber 3. Then, the airflow enters the second chamber 4 along the second guide pipe 15, and further weakens the noise and shifts the noise peak to a lower frequency through the expansion silencing effect of the sudden change in chamber volume, specifically suppressing the low frequency noise related to the resonance of the compressor's sealed housing cavity. Subsequently, the airflow enters the third chamber 5 through the inclined third guide pipe 16, and completely consumes the remaining low frequency noise through the resonance effect of the second resonance hole 18 and the third chamber 5. Finally, it flows into the condenser from the outlet 24 through the fourth guide pipe 23, completing the noise reduction and airflow delivery.

[0037] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.

Claims

1. A right-angle three-chamber intake silencer, characterized in that, The device includes a housing, within which a first partition and a second partition are disposed. The first partition is disposed perpendicular to the second partition. The first partition and the second partition divide the interior of the housing into a first chamber, a second chamber, and a third chamber. The second chamber and the third chamber are arranged longitudinally, while the first chamber is arranged horizontally. A flow guiding structure is disposed in each of the first chamber, the second chamber, and the third chamber.

2. The right-angle three-chamber intake silencer as described in claim 1, characterized in that, The housing includes a first outer shell and a second outer shell, with one end of the first partition and the second partition connected to the inner wall surface of the first outer shell.

3. A right-angle three-chamber intake silencer as described in claim 2, characterized in that, The second housing is provided with a first slot and a second slot, the first slot being perpendicular to the second slot; the first partition is inserted into the first slot, and the second partition is inserted into the second slot.

4. A right-angle three-chamber intake silencer as described in claim 3, characterized in that, The flow guiding structure includes a first flow guiding pipe, a second flow guiding pipe, a third flow guiding pipe, and a fourth flow guiding pipe; the first flow guiding pipe is disposed outside the first cavity and is connected to the shell.

5. A right-angle three-chamber intake silencer as described in claim 4, characterized in that, One end of the first guide tube is connected to the air inlet, and the other end of the first guide tube is connected to the second guide tube; the second guide tube is arranged coaxially with the first guide tube, and a first resonance hole is provided between the first guide tube and the second guide tube.

6. A right-angle three-chamber intake silencer as described in claim 5, characterized in that, One end of the second guide tube is located in the first chamber, and the other end is located in the second chamber, connecting the first chamber and the second chamber.

7. A right-angle three-chamber intake silencer as described in claim 4, characterized in that, The third guide tube is vertically inclined, so that the axis of the third guide tube forms an angle with that of the second guide tube, and the third guide tube connects the second chamber and the third chamber.

8. A right-angle three-chamber intake silencer as described in claim 4, characterized in that, A fourth guide tube is provided on the second outer shell, and the fourth guide tube is arranged in a vertical direction; one end of the fourth guide tube is connected to the air outlet, and the other end of the fourth guide tube is connected to the third chamber.

9. A right-angle three-chamber intake silencer as described in claim 8, characterized in that, The two ends of the third guide tube are aligned with the ends of the second and fourth guide tubes, respectively, and a second resonance hole is provided between the third and fourth guide tubes.

10. A compressor, characterized in that, The right-angle three-chamber intake muffler as described in any one of claims 1-9 is used, wherein the right-angle three-chamber intake muffler is connected to the exhaust pipe of the compressor.

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