Double-shell multi-chamber series exhaust noise reduction device and compressor

Abstract

The present invention provides a double-shell multi-chamber series exhaust noise reduction device and compressor, which relates to the technical field of compressor noise reduction. The double-shell multi-chamber series exhaust noise reduction device and compressor of the present invention connect various levels of chambers (muffler chambers) in series on the basis of the original exhaust muffler chamber to form a muffler, which can further enhance the attenuation of exhaust pressure pulsation and greatly improve the muffler effect of exhaust noise; and, the original exhaust muffler chamber and various levels of chambers (muffler chambers) respectively eliminate the noise and pulsation of different frequency bands of the compressor; furthermore, the first cavity directly dissipates heat to the outside through the large-area upper shell, thereby improving the heat dissipation efficiency, effectively reducing the exhaust temperature and the internal temperature of the compressor, improving the refrigeration efficiency, and reducing power consumption; in addition, the present invention realizes adaptive adjustment through two paths of refrigerant circulation, while "reducing noise and pulsation", adaptively adjusting the refrigeration capacity with the speed change, thereby improving the refrigeration capacity at high speed.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor noise reduction, and in particular to a double-shell multi-chamber series exhaust noise reduction device and a compressor. Background Art

[0002] A reciprocating compressor's crankshaft rotates once, driving the piston back and forth once via the connecting rod, completing one intake and exhaust cycle. This intermittent operation results in intermittent exhaust, causing fluctuations in exhaust pressure, known as pressure pulsation. Refrigerant flows at high speeds within the compressor and refrigerator piping, and this pressure pulsation impacts the piping walls, causing them to vibrate and even resonate, radiating noise. Furthermore, intermittent pressure pulsation generates refrigerant flow noise, which increases refrigerator noise. Therefore, controlling compressor exhaust pressure pulsation is particularly important.

[0003] Furthermore, during the high-speed and high-pressure compression and flow process in the compressor cylinder, the refrigerant generates aerodynamic noise, and the valve disc hits the valve plate, limit plate and other structures during opening and closing, generating metal slapping noise. The above noise is collectively referred to as exhaust noise. The exhaust noise is transmitted outward along the exhaust pipe. The exhaust noise accounts for a high proportion and makes a large contribution, so a noise reduction solution needs to be designed to control it.

[0004] Existing compressor technology typically uses an independent exhaust muffler chamber designed inside the housing to control noise. This reduces exhaust noise by creating an expansion muffler through chamber volume changes. Furthermore, the large chamber buffers pressure fluctuations and reduces pressure pulsation. Without increasing the overall compressor dimensions, and due to the limited internal space layout and safety distances within the housing, it's impossible to further increase the exhaust muffler chamber volume, effectively reducing exhaust noise and pressure pulsation. This results in a noisier refrigerator.

[0005] In addition, the process of compressing the refrigerant in the compressor cylinder generates a large amount of heat, which causes the exhaust refrigerant temperature to be high, and the temperature of the entire core and exhaust muffler cavity is also too high. The high temperature at the exhaust end inside the compressor can only be dissipated through metal heat transfer between the inner exhaust pipe and the outer shell. Most of the heat inside the compressor is dissipated to the outside through the outer shell, but there is a cavity between the outer shell and the core, which has poor heat transfer and low heat dissipation efficiency. Therefore, the temperature inside the compressor cannot be effectively reduced. The high temperature inside the compressor will cause the inhaled refrigerant to be heated and the temperature to rise, which will affect the working efficiency of the compressor, resulting in low refrigeration efficiency and high power consumption. Controlling the heat dissipation and cooling inside the compressor is a difficult problem that technicians in this field have always wanted to solve but have never been successful.

[0006] To overcome the deficiencies of the aforementioned prior art, the applicant applied for an invention patent on March 22, 2023, entitled "A Shell-Type Exhaust Noise Reduction Device and Compressor." However, this patented solution cannot eliminate noise and pulsation in different frequency bands of the compressor and needs to be improved. Furthermore, this patented solution cannot simultaneously achieve "noise reduction, pulsation reduction" and "adaptive adjustment of cooling capacity with speed changes." Current compressor exhaust throttling cannot change with speed, resulting in significant cooling capacity loss at high speeds. Summary of the Invention

[0007] The purpose of the present invention is to provide a double-shell multi-chamber series exhaust noise reduction device and a compressor, which can enhance the attenuation of exhaust pressure pulsation, improve the silencing effect of exhaust noise, eliminate noise and pulsation in different frequency bands of the compressor, and reduce the exhaust temperature and the internal temperature of the compressor.

[0008] In order to achieve the above objectives, the technical solutions adopted by the present invention are as follows:

[0009] A double-shell multi-chamber series exhaust noise reduction device comprises an upper outer shell, an upper inner shell, an air inlet pipe, an air outlet pipe, a lower shell, an exhaust muffler cavity, an inner exhaust pipeline and a refrigeration pipeline;

[0010] The upper inner shell is located inside the upper outer shell, the edge of the upper inner shell is sealed to the edge of the upper outer shell, and a first cavity is left between the upper inner shell and the upper outer shell;

[0011] The first cavity is divided into at least two levels of chambers, and the adjacent upper and lower chambers are connected in series via a throttling channel;

[0012] The air inlet pipe and the air outlet pipe are provided on the upper inner shell and / or the upper outer shell, the air inlet pipe is communicated with the first-stage chamber, and the air outlet pipe is communicated with the last-stage chamber;

[0013] The edge of the upper outer shell and / or the edge of the upper inner shell matches the edge of the lower shell, and a second cavity is left between the upper inner shell and the lower shell;

[0014] The exhaust muffler cavity is arranged inside the second cavity;

[0015] The inner exhaust pipeline is located inside the second cavity, one end of the inner exhaust pipeline is connected to the exhaust muffler cavity, the other end of the inner exhaust pipeline is connected to the air inlet pipe, and the air outlet pipe is connected to the refrigeration pipeline;

[0016] The exhaust silencer chamber and each level of chambers eliminate the noise and pulsation of the compressor in different frequency bands.

[0017] Preferably, the left end, rear end, right end and front end of the upper inner shell are all recessed toward one side of the second cavity to form a first recessed portion, a second recessed portion, a third recessed portion and a fourth recessed portion;

[0018] The edges of the first, second, third, and fourth recesses are all sealed to the inner wall of the upper housing via a sealing member, forming a first-level chamber between the first recess, the upper housing, and the sealing member; a second-level chamber between the second recess, the upper housing, and the sealing member; a third-level chamber between the third recess, the upper housing, and the sealing member; and a fourth-level chamber between the fourth recess, the upper housing, and the sealing member.

[0019] The first-stage chamber and the second-stage chamber have throttling channels on the blocking piece, the second-stage chamber and the third-stage chamber have throttling channels on the blocking piece, and the third-stage chamber and the fourth-stage chamber have throttling channels on the blocking piece.

[0020] Preferably, the first cavity is divided into at least three chambers, and the throttling holes include a first throttling hole and a second throttling hole. The adjacent upper chamber and lower chamber are connected in series via the first throttling hole, and the last chamber and the first chamber are connected in series via the second throttling hole. The cross-sectional area of ​​the second throttling hole is smaller than the cross-sectional area of ​​the inner exhaust pipe, and the cross-sectional area of ​​the first throttling hole is larger than the cross-sectional area of ​​the inner exhaust pipe.

[0021] The air inlet pipe, the first-stage chamber, the second throttling hole, the final chamber and the air outlet pipe serve as the first path for the circulation of the refrigerant, and the air inlet pipe, the first-stage chamber, the first throttling hole, each intermediate chamber and the first throttling hole, the final chamber and the air outlet pipe serve as the second path for the circulation of the refrigerant.

[0022] Preferably, the left end, rear end, right end and front end of the upper inner shell are all recessed toward one side of the second cavity to form a first recessed portion, a second recessed portion, a third recessed portion and a fourth recessed portion;

[0023] The edges of the first, second, third, and fourth recesses are all sealed to the inner wall of the upper housing via a sealing member, forming a first-level chamber between the first recess, the upper housing, and the sealing member; a second-level chamber between the second recess, the upper housing, and the sealing member; a third-level chamber between the third recess, the upper housing, and the sealing member; and a fourth-level chamber between the fourth recess, the upper housing, and the sealing member.

[0024] The first-stage chamber and the second-stage chamber have a first throttling channel on the sealing piece, the second-stage chamber and the third-stage chamber have a first throttling channel on the sealing piece, the third-stage chamber and the fourth-stage chamber have a first throttling channel on the sealing piece, and the fourth-stage chamber and the first-stage chamber have a second throttling channel on the sealing piece.

[0025] Preferably, the sealing piece at the junction of the first-stage chamber and the fourth-stage chamber, and the sealing piece at the junction of the third-stage chamber and the fourth-stage chamber are both configured as baffles, a lower slot is provided on the outer wall of the upper inner shell, and an upper slot is provided on the inner wall of the upper outer shell, and the baffle is plugged into the lower slot and the upper slot; the other sealing pieces are contoured fitting sections formed by the upper inner shell protruding toward one side of the first cavity, and the contoured fitting sections fit the inner wall of the upper outer shell.

[0026] Preferably, the outer contours of the recessed portions and the non-recessed portions of the upper inner shell are stepped.

[0027] Preferably, the other end of the intake pipe is set as a flared section, and the middle position of the intake pipe is set as a contraction section. The inner diameter of the flared section is larger than the outer diameter of the other end of the inner exhaust pipe, and the inner diameter of the contraction section is smaller than the outer diameter of the other end of the inner exhaust pipe. The other end of the inner exhaust pipe is inserted into the flared section of the intake pipe, and the other end of the inner exhaust pipe abuts against the contraction section. The other end of the inner exhaust pipe is welded to the edge of the flared section.

[0028] Preferably, a first through hole communicating with the first-stage chamber is formed on the upper inner shell and / or the upper outer shell, one end of the air intake pipe extends radially to form a limiting protrusion, one end of the air intake pipe passes through the first through hole, the limiting protrusion abuts against the edge of the first through hole, the limiting protrusion of the air intake pipe is welded to the edge of the first through hole, and the other end of the air intake pipe is connected to the other end of the inner exhaust pipe;

[0029] A second through hole communicating with the final chamber is provided on the upper inner shell and / or the upper outer shell, one end of the air outlet pipe is equipped with an air outlet ring sleeve, the edge of the air outlet ring sleeve is welded to the edge of the second through hole, and the other end of the air outlet pipe is connected to the refrigeration pipeline.

[0030] Preferably, the edge of the upper inner shell cooperates with the edge of the upper outer shell, and an annular notch is provided at the edge of the lower shell, and the edge of the upper outer shell cooperates with the annular notch.

[0031] A compressor includes a core assembly, and the compressor also includes the above-mentioned double-shell multi-chamber series exhaust noise reduction device, and the core assembly is located inside the second cavity.

[0032] The beneficial technical effects of the present invention are:

[0033] The double-shell multi-chamber series exhaust noise reduction device and compressor of the present invention, while maintaining the outer dimensions of the compressor unchanged, forms a cavity (first cavity) between the double-shells, and divides the first cavity into at least two levels of chambers. The adjacent upper and lower chambers are connected in series through throttling channels, so that each level of chamber becomes a large-volume silencer chamber. On the basis of the original exhaust silencer chamber, the various levels of chambers (silencer chambers) are connected in series to form a silencer, which can further enhance the attenuation of exhaust pressure pulsation and greatly improve the silencing effect of exhaust noise; and the original exhaust silencer chamber and the various levels of chambers (silencer chambers) respectively eliminate the noise and pulsation of different frequency bands of the compressor; furthermore, the first cavity directly dissipates heat to the outside through the large-area upper shell, thereby improving the heat dissipation efficiency, effectively reducing the exhaust temperature and the internal temperature of the compressor, improving the refrigeration efficiency, and reducing power consumption; in addition, the present invention realizes adaptive adjustment through two paths of refrigerant circulation, while "reducing noise and pulsation", adaptively adjusting the cooling capacity with changes in speed, thereby improving the cooling capacity at high speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 An exploded view of a compressor according to an embodiment of the present invention;

[0035] Figure 2 A cross-sectional view of a compressor according to an embodiment of the present invention Figure 1 ;

[0036] Figure 3 A cross-sectional view of a compressor according to an embodiment of the present invention Figure 2 ;

[0037] Figure 4 Exploded view of the upper outer shell, upper inner shell, air inlet pipe, and air outlet pipe of an embodiment of the present invention;

[0038] Figure 5 It is a cross-sectional view of the upper outer shell, the upper inner shell, the air inlet pipe and the air outlet pipe along the horizontal direction of an embodiment of the present invention;

[0039] Figure 6 It is a cross-sectional view of the upper outer shell, the upper inner shell, the air inlet pipe and the air outlet pipe along the front and rear vertical directions of an embodiment of the present invention;

[0040] Figure 7 1 is a cross-sectional view of the upper outer shell, the upper inner shell, the air inlet pipe, the air outlet pipe and other parts along the left and right vertical directions of an embodiment of the present invention;

[0041] Figure 8 3D is a perspective view of the upper housing according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and beneficial effects of the present invention more clearly understood, the present invention is further described below in conjunction with specific embodiments and with reference to the accompanying drawings. Certain embodiments of the present invention will be more fully described below with reference to the accompanying drawings, some, but not all, of which are illustrated. The various embodiments of the present invention may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention satisfies applicable legal requirements.

[0043] In the description of the present invention, it should be noted that the terms "inner," "outer," "upper," "lower," "front," and "rear," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In an embodiment of the present invention, a double-shell multi-chamber series exhaust noise reduction device and a compressor are provided. Please refer to Figures 1 to 8 shown.

[0045] Example 1:

[0046] A double-shell multi-chamber series exhaust noise reduction device includes an upper outer shell 11, an upper inner shell 12, an air inlet pipe 21, an air outlet pipe 22, a lower shell 13, an exhaust muffler chamber 3, an inner exhaust pipeline 4 and a refrigeration pipeline.

[0047] The upper inner shell 12 is positioned within the upper outer shell 11. The edges of the upper inner shell 12 are sealed to the edges of the upper outer shell 11, leaving a first cavity between the upper inner shell 12 and the upper outer shell 11. The external shape and dimensions of the upper outer shell 11 and the lower shell 13 remain unchanged, maintaining the overall height and dimensions of the compressor. This ensures compatibility with the design of end products (such as refrigerators) and reduces costs.

[0048] The first cavity is divided into at least two levels of chambers, and the adjacent upper-level chambers and lower-level chambers are connected in series via throttling channels.

[0049] In this embodiment, the left end, rear end, right end and front end of the upper inner shell 12 are all recessed toward one side of the second cavity (hereinafter, a second cavity is left between the upper inner shell 12 and the lower shell 13) to form a first recessed portion 121, a second recessed portion 122, a third recessed portion 123 and a fourth recessed portion 124.

[0050] The edges of the first recess 121, the second recess 122, the third recess 123 and the fourth recess 124 are sealed and connected to the inner wall of the upper shell 11 through a sealing member, forming a first-level chamber between the first recess 121, the upper shell 11 and the sealing member, a second-level chamber between the second recess 122, the upper shell 11 and the sealing member, a third-level chamber between the third recess 123, the upper shell 11 and the sealing member, and a fourth-level chamber between the fourth recess 124, the upper shell 11 and the sealing member.

[0051] The first-stage chamber and the second-stage chamber have throttling channels on the blocking piece, the second-stage chamber and the third-stage chamber have throttling channels on the blocking piece, and the third-stage chamber and the fourth-stage chamber have throttling channels on the blocking piece.

[0052] The upper inner shell 12 is connected to an air inlet pipe 21 , which is communicated with the first-stage chamber. The upper outer shell 11 is connected to an air outlet pipe 22 , which is communicated with the final-stage chamber.

[0053] The upper inner shell 12 defines a first through hole 51 that communicates with the primary chamber (first-stage chamber). One end of the intake pipe 21 extends radially to form a limiting protrusion 211. This protrusion passes through the first through hole 51, with the limiting protrusion 211 contacting the edge of the first through hole 51. The limiting protrusion 211 of the intake pipe 21 is welded to the edge of the first through hole 51, and the other end of the intake pipe 21 communicates with the other end of the internal exhaust pipe 4. Thus, the limiting protrusion 211 locates the welding position of the intake pipe 21 and the upper inner shell 12, and the limiting protrusion 211 is welded to the upper inner shell 12 at the edge of the first through hole 51, thereby ensuring a secure connection between the intake pipe 21 and the upper inner shell 12.

[0054] A second through hole 52 communicating with the final chamber (fourth-stage chamber) is provided on the upper shell 11. An outlet ring sleeve 221 is assembled at one end of the outlet pipe 22. The edge of the outlet ring sleeve 221 is welded to the edge of the second through hole 52. The other end of the outlet pipe 22 is connected to the refrigeration pipeline.

[0055] The edge of the upper inner shell 12 is laminated onto the inner wall of the upper outer shell 11. The edges of the upper inner shell 12 and the upper outer shell 11 are interference-fitted and welded together for a seal. An annular notch 131 is provided at the edge of the lower shell 13. The edge of the upper outer shell 11 fits within the annular notch 131, leaving a second cavity between the upper inner shell 12 and the lower shell 13. The annular notch 131 of the lower shell 13 constrains and squeezes the edges of the upper inner shell 12 and the upper outer shell 11, ensuring a secure fit.

[0056] The exhaust silencer chamber 3 is the original exhaust silencer of the compressor. The exhaust silencer chamber 3 is arranged inside the second cavity. The internal exhaust pipe 4 is located inside the second cavity. One end of the internal exhaust pipe 4 is connected to the exhaust silencer chamber 3, and the other end of the internal exhaust pipe 4 is connected to the air inlet pipe 21, and the air outlet pipe 22 is connected to the refrigeration pipeline.

[0057] The other end of the intake pipe 21 is provided with a flared section 212, and the middle portion of the intake pipe 21 is provided with a constricted section. The inner diameter of the flared section 212 is larger than the outer diameter of the other end of the inner exhaust pipe 4, while the inner diameter of the constricted section is smaller than the outer diameter of the other end of the inner exhaust pipe 4. The other end of the inner exhaust pipe 4 is inserted into the flared section of the intake pipe 21, and the other end of the inner exhaust pipe 4 abuts the constricted section. The other end of the inner exhaust pipe 4 is welded to the edge of the flared section 212. This facilitates the connection between the other end of the inner exhaust pipe 4 and the other end of the intake pipe 21, and ensures a secure connection between the two.

[0058] The original exhaust muffler chamber 3 is connected in series with the first-stage chamber, the second-stage chamber, the third-stage chamber, and the fourth-stage chamber to form a muffler. The first-stage chamber and the second-stage chamber are connected in series via a throttling channel, the second-stage chamber and the third-stage chamber are connected in series via a throttling channel, and the third-stage chamber and the fourth-stage chamber are connected in series via a throttling channel. By setting the volumes of the chambers at different levels and the sizes of the throttling channels between the chambers to be different, the exhaust muffler chamber 3 and the chambers at each level (the first-stage chamber, the second-stage chamber, the third-stage chamber, and the fourth-stage chamber) can respectively eliminate the noise and pulsation of different frequency bands of the compressor, achieving silencing of a wider frequency band and silencing of key frequency bands, which can significantly reduce exhaust noise and exhaust pressure pulsation.

[0059] The sealing pieces at the junction of the first-stage chamber and the fourth-stage chamber, and the sealing pieces at the junction of the third-stage chamber and the fourth-stage chamber are both set as baffles 61, a lower slot 62 is set on the outer wall of the upper inner shell 12, and an upper slot 63 is set on the inner wall of the upper outer shell 11, and the baffle 61 is plugged into the lower slot 62 and the upper slot 63; the other sealing pieces are contoured fitting sections formed by the upper inner shell 12 protruding toward one side of the first cavity, and the contoured fitting sections fit the inner wall of the upper outer shell 11.

[0060] Among them, the throttling channel between the first-stage chamber and the second-stage chamber is formed by setting a slot 81 in the contour fitting section, the throttling channel between the second-stage chamber and the third-stage chamber is formed by setting a slot 81 in the contour fitting section, and the throttling channel between the third-stage chamber and the fourth-stage chamber is formed by opening a throttling hole 82 on the baffle 61.

[0061] The outer contours of the recessed portions and the non-recessed portions (contoured matching sections) of the upper inner shell 12 are stepped. The non-recessed and recessed portions combine to form multiple angled, wedge-like structures. When sound waves strike the surfaces of the upper inner shell 12 and lower shell 13, they are refracted and reflected off these surfaces. These angled, wedge-like structures refract the noise multiple times, gradually attenuating it and achieving refraction-based silencing to reduce noise.

[0062] A compressor includes a core assembly 7. The compressor also includes the double-shell multi-chamber series exhaust noise reduction device mentioned above in this embodiment. The core assembly 7 is located inside the second cavity, and the exhaust silencer cavity 3 is arranged at the upper end of the core assembly 7.

[0063] The following steps are used to assemble and form the compressor of this embodiment and simplify the assembly process:

[0064] Weld the air outlet pipe 22 to the upper shell 11 and the air inlet pipe 21 to the upper inner shell 12. Place the upper inner shell 12 inside the upper shell 11, with the contoured fitting section fitting against the inner wall of the upper shell 11. Insert the baffle 61 into the lower slot 62 and the upper slot 63. Interference fit the edges of the upper inner shell 12 and the upper shell 11. Weld the edges of the upper inner shell 12 to the edges of the upper shell 11 so that the edges of the upper inner shell 12 are sealed against the edges of the upper shell 11.

[0065] Assemble the core assembly 6 inside the lower shell 13, and connect one end of the inner exhaust pipe 4 to the exhaust muffler chamber 3, wherein the inner exhaust pipe 4 is an elastic member and can be elastically deformed;

[0066] Move the upper shell assembly (upper outer shell 11 and upper inner shell 12) closer to the lower shell 13 from top to bottom, leaving a gap between the upper inner shell 12 and the lower shell 13, and connect the other end of the inner exhaust pipe 4 to the intake pipe 21 through the gap;

[0067] The edge of the upper shell 11 is matched with the edge of the lower shell 13, and the upper shell 11 is welded to the lower shell 13 to achieve a seal therebetween, and the inner exhaust pipe 4 is elastically deformed and moves downward.

[0068] Example 2:

[0069] The difference between this embodiment and the first embodiment is that the first cavity is divided into at least three chambers, and in this embodiment, four chambers (a first-stage chamber, a second-stage chamber, a third-stage chamber, and a fourth-stage chamber). The throttling channel includes a first throttling channel and a second throttling channel. The adjacent upper and lower chambers are connected in series via the first throttling channel, and the final chamber (the fourth-stage chamber) and the first chamber (the first-stage chamber) are connected in series via the second throttling channel. The cross-sectional area of ​​the second throttling channel is smaller than the cross-sectional area of ​​the interior of the inner exhaust pipe 4, and the cross-sectional area of ​​the first throttling channel is larger than the cross-sectional area of ​​the interior of the inner exhaust pipe 4. The air inlet pipe 21, the first-stage chamber (first-stage chamber), the second throttling hole, the final chamber (fourth-stage chamber) and the air outlet pipe 22 serve as the first path for the circulation of the refrigerant, and the air inlet pipe 21, the first-stage chamber (first-stage chamber), the first throttling hole, each intermediate chamber (second-stage chamber, third-stage chamber) and the first throttling hole, the final chamber (fourth-stage chamber) and the air outlet pipe 22 serve as the second path for the circulation of the refrigerant.

[0070] In this embodiment, the left end, rear end, right end and front end of the upper inner shell 12 are all recessed toward one side of the second cavity to form a first recessed portion 121 , a second recessed portion 122 , a third recessed portion 123 and a fourth recessed portion 124 .

[0071] The edges of the first recess 121, the second recess 122, the third recess 123 and the fourth recess 124 are sealed and connected to the inner wall of the upper shell 11 through a sealing member, forming a first-level chamber between the first recess 121, the upper shell 11 and the sealing member, a second-level chamber between the second recess 122, the upper shell 11 and the sealing member, a third-level chamber between the third recess 123, the upper shell 11 and the sealing member, and a fourth-level chamber between the fourth recess 124, the upper shell 11 and the sealing member.

[0072] The first-stage chamber and the second-stage chamber have a first throttling channel on the sealing piece, the second-stage chamber and the third-stage chamber have a first throttling channel on the sealing piece, the third-stage chamber and the fourth-stage chamber have a first throttling channel on the sealing piece, and the fourth-stage chamber and the first-stage chamber have a second throttling channel on the sealing piece.

[0073] The original exhaust silencer chamber 3 is connected in series with the first-stage chamber, the second-stage chamber, the third-stage chamber and the fourth-stage chamber in sequence to form a silencer. The first-stage chamber and the second-stage chamber are connected in series through the first throttling channel, the second-stage chamber and the third-stage chamber are connected in series through the first throttling channel, and the third-stage chamber and the fourth-stage chamber are connected in series through the first throttling channel.

[0074] The original exhaust silencer chamber 3 is connected in series with the first-stage chamber and the fourth-stage chamber in sequence to form another silencer, and the first-stage chamber and the fourth-stage chamber are connected in series via the second throttling channel.

[0075] Among them, the first throttling channel between the first-stage chamber and the second-stage chamber is formed by setting a notch 81 in the contour fitting section, the first throttling channel between the second-stage chamber and the third-stage chamber is formed by setting a notch 81 in the contour fitting section, the first throttling channel between the third-stage chamber and the fourth-stage chamber is formed by opening a throttling hole 82 on the baffle 61, and the second throttling channel between the first-stage chamber and the fourth-stage chamber is formed by opening a throttling hole 82 on the baffle 61.

[0076] So far, the present embodiment has been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the double-shell multi-chamber series exhaust noise reduction device and compressor of the present invention. The double-shell multi-chamber series exhaust noise reduction device and compressor of the present invention, under the premise of keeping the outer dimensions of the compressor unchanged, form a cavity (first cavity) between the double-shell (upper inner shell 12, upper outer shell 11), and divide the first cavity into at least two levels of chambers, and the adjacent upper and lower chambers are connected in series through throttling channels, so that each level of chamber becomes a large-volume silencer chamber, and the silencer is formed by connecting each level of chambers (silencer chambers) in series on the basis of the original exhaust silencer chamber 3, which can further enhance the exhaust pressure pulsation. Attenuation, greatly improving the silencing effect of exhaust noise; and, the original exhaust silencing chamber 3 and each level of chamber (silencing chamber) respectively eliminate the noise and pulsation of the compressor in different frequency bands; furthermore, the first cavity directly dissipates heat to the outside through the large area of ​​the upper shell 11, thereby improving the heat dissipation efficiency, effectively reducing the exhaust temperature and the internal temperature of the compressor, improving the refrigeration efficiency, and reducing power consumption; in addition, the air inlet pipe 21, the first stage chamber (first stage chamber), the second throttling channel, the final stage chamber (fourth stage chamber) and the air outlet pipe 22 serve as the second stage chamber for the circulation of refrigerant. The first path is composed of the air inlet pipe 21, the first stage chamber (first stage chamber), the first throttling hole, the intermediate chambers (second stage chamber, third stage chamber) and the first throttling hole, the final stage chamber (fourth stage chamber) and the air outlet pipe 22 as the second path for the refrigerant to circulate. When the compressor speed is low, the refrigerant flow is small, the first path is shorter than the second path, the refrigerant mainly flows along the first path, and a small amount of refrigerant flows along the second path, which has no effect on the cooling capacity. Since the cross-sectional area of ​​the second throttling hole is smaller than the cross-sectional area inside the inner exhaust pipe 4, the refrigerant mainly flows along the first path, and a small amount of refrigerant flows along the second path, which has no effect on the cooling capacity. The area is used to achieve throttling through the second throttling hole, and the throttling ability is strong. For the silencer formed from the first-stage chamber (first-stage chamber) through the second throttling hole to the final-stage chamber (fourth-stage chamber), the expansion ratio is large and the sound absorption is high, which can effectively reduce the exhaust noise and pressure pulsation; when the compressor speed increases, the refrigerant flow rate increases, and the proportion of the refrigerant flowing from the second path gradually increases. Finally, the two paths are adaptively adjusted to balance, and the two paths are jointly diverted, which has no effect on the cooling capacity, and realizes the noise reduction and attenuation pulsation of the dual-path corresponding silencer.

[0077] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-shell multi-chamber series exhaust noise reduction device, characterized by: It includes an upper outer shell, an upper inner shell, an air inlet pipe, an air outlet pipe, a lower shell, an exhaust muffler cavity, an inner exhaust pipe and a refrigeration pipe; The upper inner shell is located inside the upper outer shell, the edge of the upper inner shell is sealed to the edge of the upper outer shell, and a first cavity is left between the upper inner shell and the upper outer shell; The first cavity is divided into at least two levels of chambers, and the adjacent upper and lower chambers are connected in series via a throttling channel; The air inlet pipe and the air outlet pipe are provided on the upper inner shell and / or the upper outer shell, the air inlet pipe is communicated with the first-stage chamber, and the air outlet pipe is communicated with the last-stage chamber; The edge of the upper outer shell and / or the edge of the upper inner shell matches the edge of the lower shell, and a second cavity is left between the upper inner shell and the lower shell; The left end, rear end, right end and front end of the upper inner shell are all recessed toward one side of the second cavity to form a first recessed portion, a second recessed portion, a third recessed portion and a fourth recessed portion; The edges of the first, second, third, and fourth recesses are all sealed to the inner wall of the upper housing via a sealing member, forming a first-level chamber between the first recess, the upper housing, and the sealing member; a second-level chamber between the second recess, the upper housing, and the sealing member; a third-level chamber between the third recess, the upper housing, and the sealing member; and a fourth-level chamber between the fourth recess, the upper housing, and the sealing member. The first-stage chamber and the second-stage chamber have throttling holes on the blocking piece, the second-stage chamber and the third-stage chamber have throttling holes on the blocking piece, and the third-stage chamber and the fourth-stage chamber have throttling holes on the blocking piece; The blocking piece at the junction of the first-stage chamber and the fourth-stage chamber, and the blocking piece at the junction of the third-stage chamber and the fourth-stage chamber are both configured as baffles, a lower slot is provided on the outer wall of the upper inner shell, and an upper slot is provided on the inner wall of the upper outer shell, and the baffle is plugged into the lower slot and the upper slot; the other blocking pieces are contoured fitting sections formed by the upper inner shell protruding toward one side of the first cavity, and the contoured fitting sections are in contact with the inner wall of the upper outer shell; The exhaust muffler cavity is the original exhaust muffler of the compressor, and the exhaust muffler cavity is arranged inside the second cavity; The inner exhaust pipeline is located inside the second cavity, one end of the inner exhaust pipeline is connected to the exhaust muffler cavity, the other end of the inner exhaust pipeline is connected to the air inlet pipe, and the air outlet pipe is connected to the refrigeration pipeline; The exhaust silencer chamber and each level of chambers eliminate the noise and pulsation of the compressor in different frequency bands.

2. The double-shell multi-chamber exhaust noise reduction device according to claim 1, characterized in that: The first chamber is divided into at least three chamber stages, the throttling holes include a first throttling hole and a second throttling hole, the adjacent upper chamber and lower chamber are connected in series via the first throttling hole, the final chamber and the first chamber are connected in series via the second throttling hole, the cross-sectional area of ​​the second throttling hole is smaller than the cross-sectional area of ​​the inner exhaust pipe, and the cross-sectional area of ​​the first throttling hole is larger than the cross-sectional area of ​​the inner exhaust pipe; The air inlet pipe, the first-stage chamber, the second throttling hole, the final chamber and the air outlet pipe serve as the first path for the circulation of the refrigerant, and the air inlet pipe, the first-stage chamber, the first throttling hole, each intermediate chamber and the first throttling hole, the final chamber and the air outlet pipe serve as the second path for the circulation of the refrigerant.

3. The double-shell multi-chamber series exhaust noise reduction device according to claim 2, characterized in that: The left end, rear end, right end and front end of the upper inner shell are all recessed toward one side of the second cavity to form a first recessed portion, a second recessed portion, a third recessed portion and a fourth recessed portion; The edges of the first, second, third, and fourth recesses are all sealed to the inner wall of the upper housing via a sealing member, forming a first-level chamber between the first recess, the upper housing, and the sealing member; a second-level chamber between the second recess, the upper housing, and the sealing member; a third-level chamber between the third recess, the upper housing, and the sealing member; and a fourth-level chamber between the fourth recess, the upper housing, and the sealing member. The first-stage chamber and the second-stage chamber have a first throttling channel on the sealing piece, the second-stage chamber and the third-stage chamber have a first throttling channel on the sealing piece, the third-stage chamber and the fourth-stage chamber have a first throttling channel on the sealing piece, and the fourth-stage chamber and the first-stage chamber have a second throttling channel on the sealing piece.

4. A double-shell multi-chamber series exhaust noise reduction device according to claim 1 or 3, characterized in that: The outer contours of the recessed portions and the non-recessed portions of the upper inner shell are stepped.

5. The double-shell multi-chamber exhaust noise reduction device according to claim 1 or 2, characterized in that: The other end of the intake pipe is set as a flared section, and the middle position of the intake pipe is set as a contraction section. The inner diameter of the flared section is larger than the outer diameter of the other end of the inner exhaust pipe, and the inner diameter of the contraction section is smaller than the outer diameter of the other end of the inner exhaust pipe. The other end of the inner exhaust pipe is inserted into the flared section of the intake pipe, and the other end of the inner exhaust pipe abuts against the contraction section. The other end of the inner exhaust pipe is welded to the edge of the flared section.

6. The double-shell multi-chamber exhaust noise reduction device according to claim 1 or 2, characterized in that: A first through hole communicating with the first-stage chamber is formed on the upper inner shell and / or the upper outer shell, one end of the air intake pipe extends radially to form a limiting protrusion, one end of the air intake pipe passes through the first through hole, the limiting protrusion abuts against the edge of the first through hole, the limiting protrusion of the air intake pipe is welded to the edge of the first through hole, and the other end of the air intake pipe is connected to the other end of the inner exhaust pipe; A second through hole communicating with the final chamber is provided on the upper inner shell and / or the upper outer shell, one end of the air outlet pipe is equipped with an air outlet ring sleeve, the edge of the air outlet ring sleeve is welded to the edge of the second through hole, and the other end of the air outlet pipe is connected to the refrigeration pipeline.

7. The double-shell multi-chamber exhaust noise reduction device according to claim 1 or 2, characterized in that: The edge of the upper inner shell is matched with the edge of the upper outer shell. An annular notch is provided at the edge of the lower shell, and the edge of the upper outer shell is matched in the annular notch.

8. A compressor comprising a core assembly, characterized in that: The compressor further comprises the double-shell multi-chamber series exhaust noise reduction device according to any one of claims 1 to 7, and the core assembly is located inside the second cavity.

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