Resonant cavity air suction silencer and compressor

Abstract

The invention provides a resonant cavity air suction silencer and a compressor, relates to the field of compressors, and aims to solve the problem that an existing air suction silencer is difficult to balance high sound transmission loss and low pressure loss, the resonant cavity air suction silencer is divided into three cavities through a first baffle and a second baffle in a shell, a bent flow guide pipe is installed in the shell, and three resonant holes are formed in the flow guide pipe; the openings of the two sections of channels at the position of the resonance hole face each other, the resonance hole and the cavity form a resonance structure, when noise sound waves transmitted from the air inlet pass through the resonance hole, sound wave energy triggers resonance in the cavity, so that noise energy is attenuated due to resonance dissipation, the noise is repeatedly dissipated on a propagation path through the three-stage resonance effect, high sound transmission loss is achieved, and the noise loss is reduced. The first end is opposite to the air inlet, the second end is opposite to the air outlet, and the opposite opening of the flow guide pipe reduces gas impact and turbulence, reduces flow resistance, realizes low pressure loss, and further balances sound transmission loss and pressure loss.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressors, in particular to a resonance cavity suction muffler and a compressor. BACKGROUND

[0002] The compressor noise mainly comes from the shell vibration radiation noise and the shell internal noise, the shell internal noise includes valve plate tapping noise, refrigerant flow noise, structural part friction noise, electromagnetic noise, structural part vibration noise, etc., among which the suction and exhaust valve plate tapping noise and the high-speed refrigerant flow burst noise in the cylinder and cylinder head parts account for the highest proportion. Since the compressor suction is indirect suction, the suction muffler inlet is not directly connected with the shell, the suction muffler inlet is connected with the shell internal cavity, the valve plate tapping noise, the refrigerant burst noise and the suction pressure pulsation are transmitted through the suction muffler, and finally output to the shell internal cavity through the suction muffler inlet. The suction muffler can reduce a part of the noise and pulsation, but still excites the response of the shell internal cavity. The shell internal cavity belongs to a closed structure, and there is an acoustic mode, which changes with the change of the cavity volume and size. The main contribution is the first three modes, which are located in the range of 630-1000Hz. The smaller the volume, the higher the frequency. Under the excitation of noise and pulsation, resonance will be produced, which will amplify the noise and produce cavity resonance noise. The first three modes are translational modes, corresponding to the long axis, short axis and longitudinal direction respectively.

[0003] The noise and pulsation excitation of the reciprocating piston compressor are all integer multiples of the rotational base frequency. The compressor speed is usually 1200-4500rpm, and the corresponding base frequency is 20-75Hz. For example, when the compressor runs at 3000rpm, the base frequency is 50Hz, and there are peak values of 100Hz, 150Hz, 200Hz, 250Hz, etc. in the full frequency band, so the base frequency harmonic must cover the entire frequency band in the full speed range. There must be an excitation peak near the shell cavity modal frequency, which will excite resonance, so the cavity noise is an inherent property of the compressor noise and cannot be eliminated. At present, only the noise excitation can be reduced by optimizing the muffler. The existing suction muffler mainly improves the sound transmission loss and pulsation attenuation effect inside the muffler by single cavity, double cavity or multi-cavity combination, reduces the noise and pulsation excitation amplitude output to the shell internal cavity through the muffler inlet, but it is not easy to balance high sound transmission loss and low pressure loss. SUMMARY

[0004] The present application aims at the defects of the prior art, and provides a resonant cavity air suction silencer and a compressor.

[0005] The first object of the present application is to provide a resonant cavity air suction silencer, which adopts the following scheme: The resonant cavity air suction silencer comprises a shell, a first baffle and a second baffle. The shell has an internal cavity, which is divided into a first chamber, a third chamber and a second chamber in sequence by the first baffle and the second baffle. The first end opening of the flow guide pipe is located in the first chamber and faces the air inlet, the second end of the flow guide pipe passes through the third chamber into the second chamber and then returns to the second chamber, and the second end opening faces the air outlet.

[0006] Further, the flow guide pipe comprises a first flow guide pipe, a second flow guide pipe and a third flow guide pipe.

[0007] Further, the third flow guide pipe is S-shaped, and the first opening and the second opening are arranged on the side wall of the segment of the third flow guide pipe in the second chamber to form the second resonant hole.

[0008] Further, the third flow guide pipe is formed by buckling the first flow guide groove and the second flow guide groove, the buckling position is matched by the sealing groove, and the bottom surface of the first flow guide groove is inclined to adjust the second end opening of the third flow guide pipe to face the air outlet.

[0009] Further, the shell comprises an embedded structure and buckled first and second shells, the first baffle is fixed on the first shell as a first partition plate, the embedded structure comprises a second flow guide groove and a third partition plate, the third partition plate is combined and fixed on the second partition plate of the first shell to form the second baffle, the flow guide pipe of the first shell comprises a first flow guide groove, and the second flow guide groove buckles the first flow guide groove to form a partial segment of the flow guide pipe.

[0010] Further, the second shell is provided with a first slot and a third slot, the first slot is inserted and sealed with the first partition plate away from the first shell, and the third partition plate is inserted and sealed with the second partition plate through the second slot and the third slot.

[0011] Further, the second shell is provided with a pressing block, after the first shell and the second shell are buckled, the pressing block abuts against the second flow guide groove to seal the buckling position of the first flow guide groove and the second flow guide groove.

[0012] Further, the first resonance hole is located at one end of the internal cavity of the muffler, and the second resonance hole is located at the other end of the internal cavity of the muffler, and the first chamber, the second chamber and the third chamber are all resonance type sound attenuation cavities.

[0013] The second object of the application is to provide a compressor using the resonance cavity suction muffler provided in the first object.

[0014] Further, the exhaust port is connected with the cylinder head, and the air inlet is communicated with the internal cavity of the compressor.

[0015] Compared with the prior art, the application has the advantages and positive effects that: In view of the problem that the current suction muffler is difficult to balance high sound transmission loss and low pressure loss, the first baffle and the second baffle in the shell are separated to form three chambers, a bent flow guide pipe is installed in the shell, the flow guide pipe forms three resonance holes, the first resonance hole and the first chamber constitute a resonance structure, when the noise sound wave transmitted through the air inlet passes through the first resonance hole, the sound wave energy induces resonance in the first chamber, so that the noise energy is attenuated due to resonance dissipation; the second resonance hole is communicated with the second chamber inside the flow guide pipe, when the sound wave propagates in the flow guide pipe to the second resonance hole, resonance is formed with the second chamber, further consuming noise energy; the third resonance hole and the third chamber form a resonance, which further attenuates the residual noise about to be transmitted from the air outlet, through the three-stage resonance effect, the noise is dissipated multiple times on the propagation path, realizing high sound transmission loss, three resonance type sound attenuation cavities are connected in series, greatly improving the sound transmission loss of medium and low frequency, improving the noise reduction amount of medium and low frequency noise, the first end is opposite to the air inlet, the second end is opposite to the air outlet, and the opposite opening of the flow guide pipe reduces gas impact and turbulence, reduces flow resistance, realizes low pressure loss, and further balances the sound transmission loss and pressure loss.

[0016] The double-opening design of the S-shaped third flow guide pipe and the spatial staggered distribution of the resonance holes enable the muffler to effectively attenuate more frequency bands of noise, improving the adaptability to complex intake noise, in addition, the third flow guide pipe is assembled by the first flow guide groove and the second flow guide groove, and the combination of the pressing block makes the third flow guide pipe have good sealing performance, solving the problem that the non-straight pipe is not convenient for common mold opening of the shell.

[0017] The first baffle and the second baffle can cooperate with the first slot and the second slot, in order to reduce the loose noise caused by the slot gap, the first resonance hole is located at the air inlet end of the first chamber, the second resonance hole is located at the air outlet end of the third chamber, and is located at the starting point and the ending point of the internal chamber of the muffler respectively, close to the shell, and the impact of the refrigerant on the internal partition plate is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings constituting a part of the specification of the present application are used to provide further understanding of the present application, the illustrative embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application.

[0019] Figure 1 It is a schematic view of the first shell combination embedded structure in one or more embodiments of the present application.

[0020] Figure 2 It is a schematic view of the internal structure of the resonance cavity air suction muffler in one or more embodiments of the present application.

[0021] Figure 3 It is an exploded view of the resonance cavity air suction muffler in one or more embodiments of the present application.

[0022] Figure 4 It is an internal schematic view of the resonance cavity air suction muffler in one or more embodiments of the present application.

[0023] Among them, 1, the first shell; 2, the second shell; 3, the embedded structure; 4, the first chamber; 5, the second chamber; 6, the third chamber; 11, the first partition; 12, the second partition; 13, the air inlet; 14, the first flow guide pipe; 15, the second flow guide pipe; 16, the third flow guide pipe; 17, the first flow guide slot; 18, the first resonance hole; 19, the second resonance hole; 110, the third resonance hole; 111, the first opening; 112, the profiling groove; 21, the first slot; 22, the third slot; 23, the fourth flow guide pipe; 24, the air outlet; 25, the pressing block; 31, the second slot; 32, the third partition; 33, the second flow guide slot; 34, the second opening; 35, the sealing groove; 36, the pressing platform. DETAILED DESCRIPTION

[0024] Embodiment 1 In a typical embodiment of the present application, as shown in Figures 1-4 , a resonance cavity air suction muffler is given.

[0025] The prior art is difficult to balance high sound transmission loss and low pressure loss, to solve the problem, the embodiment provides a resonance cavity air suction silencer, a resonance system formed by three-stage resonance holes and corresponding chambers can attenuate noise of different frequencies in multiple stages, which significantly improves the noise elimination effect on intake noise; the continuous bending structure and the directly opposite opening design of the flow guide pipe reduce the impact and turbulence in the gas flow process, reduce the pressure loss and ensure the gas flow efficiency; finally, the balance between high sound transmission loss and low pressure loss is achieved, and the defects of the prior art are overcome.

[0026] As shown in Figures 1-4 , the resonance cavity air suction silencer comprises a shell and an internal flow guide pipe.

[0027] The inside of the shell is divided into three chambers in sequence, i.e., a first chamber 4, a third chamber 6 and a second chamber 5, by a first baffle and a second baffle. The first chamber 4 is provided with an air inlet 13 at one end as a gas inflow end to suck the refrigerant in the compressor shell into the air suction silencer, and the third chamber 6 is provided with an air outlet 24 at one side as a gas outflow end to input the sucked refrigerant into the compressor cylinder for compression.

[0028] The flow guide pipe is a multi-bending structure, the first end opening of the flow guide pipe is located in the first chamber 4 and directly opposite the air inlet 13, the second end passes through the third chamber 6 into the second chamber 5 and then returns to the second chamber 5, and the second end opening is directly opposite the air outlet 24. The first end opening and the air inlet 13 form a first resonance hole 18; the segment of the flow guide pipe located in the second chamber 5 is provided with an opening to form a second resonance hole 19; and the second end opening and the air outlet 24 form a third resonance hole 110.

[0029] The resonance holes are used to achieve high sound transmission loss, three resonance holes form resonance systems with corresponding chambers, the first resonance hole 18 and the first chamber 4 constitute a resonance structure, when the noise sound waves transmitted by the air inlet 13 pass through the first resonance hole 18, the sound wave energy induces resonance in the first chamber 4, so that the noise energy is attenuated due to resonance dissipation; the second resonance hole 19 connects the inside of the flow guide pipe and the second chamber 5, when the sound wave propagates in the flow guide pipe to the second resonance hole 19, resonance is formed with the second chamber 5, further consuming noise energy; the third resonance hole 110 forms resonance with the third chamber 6, further attenuating the residual noise about to be transmitted from the air outlet 24, through three-stage resonance, the noise is dissipated multiple times on the propagation path, achieving high sound transmission loss.

[0030] The pressure loss is reduced by the layout of the flow guide pipe and the chamber, and the bending structure of the flow guide pipe provides a continuous channel for gas flow, so that the gas turns back after entering the second chamber 5 from the first chamber 4 through the third chamber 6. After the gas enters the first chamber 4 from the air inlet 13, it enters the flow guide pipe through the first end opening of the flow guide pipe, passes through the third chamber 6 and the second chamber 5 in turn along the flow guide pipe, and finally flows out from the second end opening through the air outlet 24. The first end is opposite to the air inlet 13, and the second end is opposite to the air outlet 24, so that the entire flow path is unobstructed. The opposite opening of the flow guide pipe reduces the airflow impact and turbulence, reduces the flow resistance, and achieves low pressure loss.

[0031] As shown in Figure 1 and Figure 2 The first chamber 4, the second chamber 5 and the third chamber 6 are separated by baffles, so that the resonance systems corresponding to the resonance holes work independently and are connected to each other. This not only avoids interference between different frequencies of noise, but also ensures that the sound waves are gradually attenuated in multi-stage resonance. At the same time, the orderly distribution of the chambers provides a reasonable arrangement space for the flow guide pipe, ensures smooth gas flow path, and further balances the sound transmission loss and pressure loss.

[0032] Through the above structure design, the resonance cavity air intake silencer realizes high sound transmission loss. The resonance system formed by the three-stage resonance holes and the corresponding chambers can attenuate noise of different frequencies in multiple stages, significantly improving the noise reduction effect on intake noise. It also realizes low pressure loss. The continuous bending structure and opposite opening design of the flow guide pipe reduce the impact and turbulence during gas flow, reduce the pressure loss, and ensure the gas flow efficiency. Finally, the balance between high sound transmission loss and low pressure loss is achieved, overcoming the defects of the prior art.

[0033] In this embodiment, improvements are also made to the resonance frequency coverage range, gas flow path stability and assembly sealing. By refining the flow guide pipe segments, optimizing the resonance hole layout and strengthening the shell sealing, the silencer can still maintain high-efficiency noise reduction and low-resistance characteristics in complex airflow environments.

[0034] The flow guide pipe is composed of a first flow guide pipe 14, a second flow guide pipe 15 and a third flow guide pipe 16 connected in sequence. The first flow guide pipe 14 is responsible for introducing the gas in the first chamber 4 into the flow guide pipe, and the end portion thereof inserted into the first chamber 4 forms a first end opening. The second flow guide pipe 15 serves as an intermediate connecting section, and connects the first flow guide pipe 14 and the third flow guide pipe 16 through the second baffle, thereby realizing the transition of the gas from the third chamber 6 to the second chamber 5. The third flow guide pipe 16 has an S-shaped structure, and the section located in the second chamber 5 is provided with a first opening and a second opening 34. The end portion thereof inserted into the third chamber 6 through the second baffle forms a second end opening, and the internal passage thereof is oppositely distributed on both sides of the second resonance hole 19.

[0035] The third flow guide pipe 16 is formed by buckling the first flow guide groove 17 and the second flow guide groove 33, and the buckling position is sealed by the sealing groove 35 to ensure that the gas does not leak; the bottom surface of the first flow guide groove 17 is inclined, so that the second end opening is accurately opposite to the gas outlet 24, thereby reducing the turning resistance when the gas flows out.

[0036] The shell is composed of a first shell, a second shell and an embedded structure 3, the first baffle is fixed on the first shell as the first partition plate 11, the embedded structure 3 includes the second flow guide groove 33 and the third partition plate 32, the third partition plate 32 is combined and fixed with the second partition plate 12 on the first shell to form the second baffle, and the flow guide pipe of the first shell includes the first flow guide groove 17, and the second flow guide groove 33 buckles the first flow guide groove 17 to form a partial segment of the flow guide pipe.

[0037] The second shell is provided with the first insertion slot 21 and the third insertion slot 22, the first insertion slot 21 is inserted and sealed with the side of the first partition plate 11 away from the first shell, one side of the third partition plate 32 is inserted and sealed with the second partition plate 12 through the second insertion slot 31, and the other side is inserted and sealed with the third insertion slot 22. The second shell is provided with a pressing block 25, after the first shell and the second shell are buckled, the pressing block 25 abuts against the pressing platform 36 arranged on the second flow guide groove 33 to seal the buckling position of the first flow guide groove 17 and the second flow guide groove 33.

[0038] The first resonance hole 18 is located at one end of the cavity, and the second resonance hole 19 is directed to the other end of the cavity to form a distribution along the length direction of the cavity; the first cavity 4, the second cavity 5 and the third cavity 6 are all resonance type sound attenuation cavities, which cooperatively act with the corresponding resonance holes.

[0039] The S-shaped structure of the third flow guide pipe 16 makes the first opening 111 and the second opening 34 of the second resonance hole 19 distributed apart, and the two side channels are opposite to each other, which not only enlarges the contact area between the second resonance hole 19 and the second cavity 5, but also makes the sound waves more evenly pass through the two openings into the second cavity 5 when propagating in the flow guide pipe, thereby enhancing the resonance dissipation effect; the spatial staggered distribution of the first resonance hole 18 and the second resonance hole 19 makes the two resonance systems respectively attenuate the noise of different frequency bands, in combination with the terminal attenuation of the third resonance hole 110, so that a wider frequency range of noise is covered, and the sound transmission loss is further improved.

[0040] The first insertion slot 21, the second insertion slot 31 and the third insertion slot 22 cooperate with the first partition plate 11, the second partition plate 12 and the third partition plate 32 respectively, the shell is sealed by multiple insertion and abutting of the pressing block 25, so as to prevent the gas in the cavities from leaking and the external interference airflow from entering, ensure the volume stability of the cavities, and avoid resonance system failure caused by gas leakage; the sealing groove 35 at the buckling position of the flow guide pipe prevents the gas from leaking between the flow guide pipe and the cavity, ensures that the gas flows along the flow guide pipe, reduces the unexpected airflow disturbance, and further reduces the pressure loss.

[0041] In addition, the current compressor suction muffler has internal structural defects. When a serpentine flow guide pipe is used inside, although the pressure loss is small and the flow resistance is small, the two parts need to be buckled together, the gap is large, it is easy to loosen, the sealing performance is poor, the leakage is large, the noise cannot reach the design effect, and the consistency is poor. When a straight insertion pipe is used inside, although the leakage is small, the actual noise reduction effect is consistent with the design, but the angle is formed between different flow guide pipes, the local pressure loss is large, the flow resistance is large, and the efficiency is low. At the same time, most of the current mufflers are double-cavity structures, the number of cavities is small, the number of sound attenuation peaks is small, and the sound attenuation effect on wideband noise is not ideal. To this end, in the embodiment, the shell combination mode is optimized to solve the problems of flow guide pipe gap and leakage inside the muffler, and large local pressure loss, reduce the internal pressure loss, improve the efficiency, and improve the sound attenuation effect of the suction muffler on wideband noise, to balance the high sound transmission loss, low pressure loss, and good consistency.

[0042] In the embodiment, the structure of the flow guide pipe is described in detail. Figure 3 and Figure 4 The structure of the flow guide pipe is described in detail.

[0043] The first outer shell 1 is provided with a first flow guide pipe 14, a second flow guide pipe 15, and a first flow guide groove 17 in sequence from the air inlet 13. The first flow guide pipe 14 is horizontally arranged and communicates the air inlet 13 with the first chamber 4. It is inserted into the first chamber 4 to a certain depth, and the opening formed between the first flow guide pipe 14 and the first partition plate 11 is a first resonance hole 18, so that the first chamber 4 becomes a resonance type sound attenuation chamber. The second flow guide pipe 15 is coaxially arranged with the first flow guide pipe 14 and crosses the third chamber 6 to reach the second chamber 5, thereby communicating the first chamber 4 with the second chamber 5. The passage in the air outlet 24 of the second outer shell 2 serves as a fourth flow guide pipe 23 and is vertically arranged, thereby communicating the third chamber 6 with the air outlet 24 towards one end of the third flow guide pipe 16, and not being inserted into the third chamber 6.

[0044] The first flow guide groove 17 on the first outer shell 1 is S-shaped, and its inlet is connected to the end of the second flow guide pipe 15 along the airflow direction. The outlet is gradually raised at a certain angle with the plane of the first outer shell 1 in the third chamber 6, and the outlet is aligned with the fourth flow guide pipe 23. In order to realize the gradual lifting of the third flow guide pipe 16, a bionic groove is provided on the back of the first shell, and the bottom surface of the bionic groove forms a slope surface in the cavity of the shell, which serves as the bottom surface of the first flow guide groove 17. The second flow guide groove 33 on the inner embedded structure 3 has the same shape as the first flow guide groove 17, and the edge thereof is provided with a sealing groove 35. After the two are assembled, they jointly form the third flow guide pipe 16, thereby communicating the second chamber 5 and the third chamber 6.

[0045] The first opening 111 is arranged at the portion of the first flow guide groove 17 in the second chamber 5, and the second opening 34 is arranged at the corresponding position of the second flow guide groove 33, and the two openings together form the second resonance hole 19, so that the second chamber 5 becomes a resonance type sound attenuation chamber. The outlet of the third flow guide pipe 16 is aligned with the inlet of the fourth flow guide pipe 23, and a gap is left to form the third resonance hole 110, so that the third chamber 6 becomes a resonance type sound attenuation chamber.

[0046] The back of the first shell 1 is provided with a concave profiled groove 112 corresponding to the inclination angle of the first flow guide groove 17, so as to keep the wall thickness uniform and facilitate mold opening production. The outlet position of the second flow guide groove 33 is provided with a pressing platform 36, and the second shell 2 is provided with a pressing block 25 at the corresponding position. After assembly, the two are in contact and pressed, preventing the gap from leaking and the loose noise from occurring.

[0047] The three independent resonance type sound attenuation chambers (the first chamber 4, the second chamber 5, and the third chamber 6) form a resonance system through the first resonance hole 18, the second resonance hole 19, and the third resonance hole 110, respectively. When the noise and pulsation excitation enters through the air inlet 13, it induces resonance in the first chamber 4 through the first resonance hole 18, consuming part of the noise energy. Then, the noise and pulsation propagate in the flow guide pipe, and when they reach the second chamber 5, they form resonance with the second chamber 5 through the second resonance hole 19, further consuming energy. Finally, the residual noise and pulsation in the third chamber 6 again resonate through the third resonance hole 110, thereby achieving effective noise reduction of wideband noise, especially low-frequency noise.

[0048] The flow channel of the entire sound attenuation device is designed to be butt-jointed front and back without angle mutation, such as the coaxial arrangement of the first flow guide pipe 14 and the second flow guide pipe 15, the alignment of the outlet of the first flow guide groove 17 with the fourth flow guide pipe 23, and the alignment of the outlet of the third flow guide pipe 16 with the inlet of the fourth flow guide pipe 23, thereby reducing the impact and turbulence in the gas flow process and reducing the flow resistance and pressure loss. At the same time, the S-shaped streamline design of the third flow guide pipe 16 also helps to reduce the flow resistance and improve the efficiency.

[0049] The three parts of the sound attenuation device are pressed tightly through the partition and the slot, the sealing groove 35 at the edge of the second flow guide groove 33 covers the edge of the first flow guide groove 17, and the pressing block 25 on the second shell 2 is in contact and pressed with the pressing platform 36 at the outlet position of the second flow guide groove 33, effectively avoiding the gap and leakage of the flow guide pipe and preventing the generation of loose noise. In addition, the first resonance hole 18 and the second resonance hole 19 are respectively located at the starting point and the end point of the internal chamber of the sound attenuation device and are close to the shell, reducing the impact of the refrigerant on the internal partition and further reducing the loose noise.

[0050] In addition, the third flow guide pipe 16 is assembled by the first flow guide groove 17 and the second flow guide groove 33, adopts an S-shaped structure, solves the problem that a non-straight pipe cannot be molded, and reduces flow resistance and improves efficiency due to the streamlined design.

[0051] Embodiment 2 In another typical embodiment of the present application, as shown in Figures 1-4 a compressor is given, which utilizes the resonant cavity suction silencer as in Embodiment 1.

[0052] The compressor directly integrates the resonant cavity suction silencer as in Embodiment 1, the air inlet 13 of the silencer is in communication with the suction path inside the compressor, the air outlet 24 is connected with the working cavity (such as the cylinder) of the compressor, and the suction and noise reduction treatment of the refrigerant gas are realized.

[0053] When the compressor operates, the refrigerant gas enters through the air inlet 13 of the silencer, is guided through the first chamber 4, the third chamber 6, the second chamber 5 inside the silencer and the flow guide pipe, under the action of the resonant system formed by the three resonant holes and the corresponding chambers, the noise and pulsation excitation are attenuated by multiple stages; at the same time, the low pressure loss characteristics of the silencer ensure the smooth flow of the refrigerant gas, reduce the suction energy consumption of the compressor, improve the noise performance of the whole machine, and improve the operation efficiency, and overcome the problems of large noise and low efficiency of the existing compressor caused by the defects of the suction silencer.

[0054] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A resonant cavity suction muffler, characterized in that: include: The housing has an internal cavity divided into a first chamber, a third chamber, and a second chamber in sequence by a first baffle and a second baffle, an air inlet is provided at one end of the first chamber, and an air outlet is provided at one side of the third chamber; The guide tube has a first end opening located in the first chamber and facing the air inlet, a second end passing through the third chamber into the second chamber and then returning to the second chamber, with the second end opening facing the air outlet; a first resonance hole is formed between the first end opening and the air inlet, an opening is provided on the section of the guide tube in the second chamber to form a second resonance hole, and a third resonance hole is formed between the second end opening and the air outlet.

2. The resonant cavity suction muffler according to claim 1, characterized in that: The guide tube includes a first guide tube, a second guide tube and a third guide tube. One end of the first guide tube extends into the first chamber to form a first end opening, and the other end is connected to the second guide tube. The second guide tube passes through the second baffle and extends to the second chamber and is connected to the third guide tube. The third guide tube passes through the second baffle and extends into the third chamber to form a second end opening.

3. The resonant cavity suction muffler according to claim 2, characterized in that: The third flow guide tube is S-shaped, and a first opening and a second opening are formed on the side wall of the segment of the third flow guide tube in the second chamber, which together form a second resonance hole. The channels in the third flow guide tube on both sides of the second resonance hole are arranged opposite each other.

4. The resonant cavity suction muffler according to claim 2 or 3, characterized in that: The third guide pipe is formed by buckling the first guide groove and the second guide groove, the buckling position is matched through the sealing groove, and the bottom surface of the first guide groove is inclined so that the second end opening of the third guide pipe is adjusted to face the air outlet.

5. The resonant cavity suction muffler according to claim 1, characterized in that: The shell includes an embedded structure and a first shell and a second shell that are interlocked. The first baffle is fixed to the first shell as a first partition. The embedded structure includes a second guide groove and a third partition. The third partition is combined with the second partition fixed to the first shell to form a second baffle. The guide pipe of the first shell includes a first guide groove. The second guide groove is interlocked with the first guide groove to form a local section of the guide pipe.

6. The resonant cavity suction muffler according to claim 5, characterized in that: The second shell is provided with a first slot and a third slot. The first slot is plugged and sealed with the first partition away from the first shell. One side of the third partition is plugged and sealed with the second partition through the second slot, and the other side is plugged and sealed with the third slot.

7. The resonant cavity suction muffler according to claim 5 or 6, characterized in that: The second shell is provided with a pressing block. After the first shell and the second shell are buckled together, the pressing block abuts against the second guide groove to seal the buckled position of the first guide groove and the second guide groove.

8. The resonant cavity suction muffler according to claim 1, characterized in that: The first resonance hole is located at one end of the internal cavity of the muffler, and the second resonance hole faces the other end of the internal cavity of the muffler. The first chamber, the second chamber and the third chamber are all resonant muffler chambers.

9. A compressor, characterized in that: Utilize the resonant cavity suction muffler according to any one of claims 1 to 8.

10. The compressor according to claim 9, wherein The exhaust port is connected to the cylinder head, and the air inlet is connected to the inner cavity of the compressor.

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