Shell-type exhaust noise reduction device and compressor

Abstract

The present invention provides a shell-type exhaust noise reduction device and a compressor, which relate to the technical field of compressor noise reduction. The shell-type exhaust noise reduction device and the 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-layer shell (upper inner shell, upper outer shell), and connect the cavity with the internal exhaust pipe and the refrigeration pipe respectively, so that the cavity forms a large-volume exhaust silencer cavity. On the basis of the original exhaust silencer cavity, a large-volume exhaust silencer cavity is connected in series, which can further enhance the attenuation of exhaust pressure pulsation and greatly improve the silencing effect of exhaust noise; moreover, the cavity directly dissipates heat to the outside through the large-area upper outer 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 upper inner shell forms a plurality of protrusions and recesses on the side of the second cavity to achieve refraction silencing, thereby improving the silencing effect of noise.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor noise reduction, and in particular to a shell-type 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. Summary of the Invention

[0006] The object of the present invention is to provide a shell-type exhaust noise reduction device and a compressor, which can enhance the attenuation of exhaust pressure pulsation, improve the silencing effect of exhaust noise, and reduce the exhaust temperature and the internal temperature of the compressor.

[0007] In order to achieve the above objectives, the technical solutions adopted by the present invention are as follows:

[0008] A shell-type 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;

[0009] 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;

[0010] The air inlet pipe and the air outlet pipe are provided on the upper inner shell and / or the upper outer shell, and the air inlet pipe and the air outlet pipe are respectively communicated with the first cavity;

[0011] 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;

[0012] The exhaust muffler cavity is arranged inside the second cavity;

[0013] 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.

[0014] 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.

[0015] Preferably, a first through hole is opened on the upper inner shell and / or the upper outer shell, one end of the intake pipe extends radially to form a limiting protrusion, one end of the intake pipe passes through the first through hole, the limiting protrusion abuts the edge of the first through hole, the limiting protrusion position of the intake pipe is welded to the edge position of the first through hole, and the other end of the intake pipe is connected to the other end of the inner exhaust pipe.

[0016] Preferably, a second through hole is opened 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.

[0017] Preferably, the upper inner shell forms a plurality of raised portions and recessed portions on the side facing the second cavity.

[0018] Preferably, the outer contours of the raised portion and the recessed portion are stepped.

[0019] 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.

[0020] A compressor includes a core assembly, and the compressor also includes the above-mentioned shell-type exhaust noise reduction device, and the core assembly is located inside the second cavity.

[0021] Preferably, the compressor is assembled and formed by the following steps:

[0022] Connect the upper outer shell to the air outlet pipe, connect the upper inner shell to the air inlet pipe, and seal the edge of the upper inner shell to the edge of the upper outer shell;

[0023] Assemble the core assembly inside the lower shell, and connect one end of the internal exhaust pipe to the exhaust muffler cavity, wherein the internal exhaust pipe can be elastically deformed;

[0024] A gap is left between the upper inner shell and the lower shell, and the other end of the inner exhaust pipe is connected to the intake pipe through the gap;

[0025] The edge of the upper shell is matched with the edge of the lower shell, and the inner exhaust pipe is elastically deformed.

[0026] The beneficial technical effects of the present invention are:

[0027] The shell-type 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-layer shell (upper inner shell, upper outer shell), and connect the cavity with the internal exhaust pipeline and the refrigeration pipeline respectively, so that the cavity forms a large-volume exhaust silencer cavity. On the basis of the original exhaust silencer cavity, a large-volume exhaust silencer cavity is connected in series, which can further enhance the attenuation of exhaust pressure pulsation and greatly improve the silencing effect of exhaust noise; moreover, the cavity directly dissipates heat to the outside through the large-area upper outer 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 upper inner shell forms a plurality of protrusions and recessed portions on the side of the second cavity to achieve refraction silencer to improve the silencing effect of noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 An exploded view of a compressor according to an embodiment of the present invention;

[0029] Figure 2 A cross-sectional view of a compressor according to an embodiment of the present invention Figure 1 ;

[0030] Figure 3A cross-sectional view of a compressor according to an embodiment of the present invention Figure 2 ;

[0031] Figure 4 A partial three-dimensional diagram of the upper outer shell, upper inner shell, air inlet pipe, and air outlet pipe of an embodiment of the present invention;

[0032] Figure 5 Exploded view of the upper outer shell, upper inner shell, air inlet pipe, and air outlet pipe of an embodiment of the present invention;

[0033] Figure 6 This is a three-dimensional diagram of an air intake pipe according to an embodiment of the present invention. DETAILED DESCRIPTION

[0034] 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.

[0035] 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.

[0036] In an embodiment of the present invention, a shell-type exhaust noise reduction device, a compressor and a noise reduction method are provided. Please refer to Figures 1 to 6 shown.

[0037] A shell-type exhaust noise reduction device comprises 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.

[0038] The upper inner shell 12 is located inside the upper outer shell 11, and the edge of the upper inner shell 12 is sealed to the edge of the upper outer shell 11, leaving a first cavity 51 between the upper inner shell 12 and the upper outer shell 11. The upper outer shell 11 and the upper inner shell 12 are stamped from steel plates using a stamping process. The thickness of the upper outer shell 11 is large, and the thickness of the upper inner shell 12 is small. The total thickness of the upper outer shell 11 and the upper inner shell 12 is the same as the thickness of the lower shell 13. The external shape and size of the upper outer shell 11 and the lower shell 13 remain unchanged, and do not affect the height and size of the compressor as a whole, thereby achieving compatibility with the design of terminal products (such as refrigerators, etc.) and reducing costs.

[0039] The edge of the upper inner shell 12 is interference fit with the edge of the upper outer shell 11 to achieve a tight connection between the edge of the upper inner shell 12 and the edge of the upper outer shell 11; then the edge of the upper inner shell 12 and the edge of the upper outer shell 11 are welded to achieve a seal between the two.

[0040] An air inlet pipe 21 is provided on the upper inner shell 12 , and an air outlet pipe 22 is provided on the upper outer shell 11 . The air inlet pipe 21 and the air outlet pipe 22 are respectively communicated with the first cavity 51 .

[0041] The edge of the upper inner shell 12 is stacked on the inner wall of the upper outer shell 11, and the outer edge of the upper outer shell 11 mates with the edge of the lower shell 13, leaving a second cavity 52 between the upper inner shell 12 and the lower shell 13. Specifically, 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, thereby securing the upper and lower shells 11 and 13 together. Thus, the annular notch 131 of the lower shell 13 constrains and squeezes the edge of the upper inner shell 12 against the edge of the upper outer shell 11, ensuring a secure fit between the edge of the upper inner shell 12 and the edge of the upper outer shell 11.

[0042] The exhaust muffler chamber 3 is the original exhaust muffler of the compressor, and the exhaust muffler chamber 3 is arranged inside the second cavity 52 .

[0043] The inner exhaust pipeline 4 is located inside the second cavity 52 , one end of the inner exhaust pipeline 4 is connected to the exhaust muffler cavity 3 , the other end of the inner exhaust pipeline 4 is connected to the air inlet pipe 21 , and the air outlet pipe 22 is connected to the refrigeration pipeline.

[0044] The upper inner shell 12 has a first through hole 121 formed longitudinally. One end of the intake pipe 21 extends radially to form a limiting protrusion 211. This protrusion passes through the first through hole 121, with the limiting protrusion 211 contacting the edge of the first through hole 121. The limiting protrusion 211 of the intake pipe 21 is welded to the edge of the first through hole 121, and the other end of the intake pipe 21 is connected to the other end of the inner 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 121, thereby ensuring a secure connection between the intake pipe 21 and the upper inner shell 12.

[0045] A second through hole 111 is opened transversely on the upper shell 11 , an outlet ring 221 is assembled on one end of the outlet pipe 22 , the edge of the outlet ring 221 is welded to the edge of the second through hole 111 , and the other end of the outlet pipe 22 is connected to the refrigeration pipeline.

[0046] 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 213. 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 213 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 212 of the intake pipe 21, abutting against the constricted section 213. 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.

[0047] The upper inner shell 12 has several raised portions 122 and recessed portions 123 formed on the side facing the second cavity 52. ​​More specifically, the raised portions 122 and recessed portions 123 have stepped outer contours. The raised portions 122 and recessed portions 123 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.

[0048] A compressor includes a core assembly 6. The compressor also includes the shell-type exhaust noise reduction device mentioned above in this embodiment. The core assembly 6 is located inside the second cavity 52, and the exhaust silencer cavity 3 is arranged at the upper end of the core assembly 6.

[0049] The following steps are used to assemble and form the compressor of this embodiment and simplify the assembly process:

[0050] Weld the air outlet pipe 22 to the upper outer shell 11 and the air inlet pipe 21 to the upper inner shell 12. Interference fit the edges of the upper inner shell 12 and the upper outer shell 11. Weld the edges of the upper inner shell 12 and the upper outer shell 11 so that the edges of the upper inner shell 12 are sealed to the edges of the upper outer shell 11.

[0051] 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;

[0052] 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;

[0053] 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.

[0054] So far, this embodiment has been described in detail in conjunction with the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the shell-type exhaust noise reduction device and compressor of the present invention. The shell-type exhaust noise reduction device and compressor of the present invention, while maintaining the outer dimensions of the compressor unchanged, form a cavity (first cavity 51) between the double-layer shell (upper inner shell 12, upper outer shell 11), and connect the cavity to the internal exhaust pipe 4 and the refrigeration pipe respectively, so that the cavity forms a large-volume exhaust silencer cavity. On the basis of the original exhaust silencer cavity 3, a large-volume exhaust silencer cavity (first cavity 51) is connected in series, which can further enhance the attenuation of exhaust pressure pulsation and greatly improve the silencing effect of exhaust noise; and the cavity directly dissipates heat outward through the large-area upper outer shell 11, thereby improving heat dissipation efficiency, effectively reducing the exhaust temperature and the internal temperature of the compressor, improving refrigeration efficiency, and reducing power consumption; in addition, the upper inner shell 12 forms a plurality of protrusions 122 and recesses 123 on the side of the second cavity 52 to achieve refraction silencing, thereby improving the silencing effect of noise.

[0055] 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 shell-type exhaust noise reduction device, characterized in that: 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 air inlet pipe and the air outlet pipe are respectively provided on the upper inner shell and the upper outer shell, and the air inlet pipe and the air outlet pipe are respectively communicated with the first cavity; 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 upper inner shell is formed with a plurality of raised portions and recessed portions on the side facing the second cavity. The outer contours of the raised portions and recessed portions are stepped. The stepped raised portions and recessed portions in the second cavity are combined to form a plurality of angled wedge-like structures. 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.

2. The shell-type exhaust noise reduction device according to claim 1, 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.

3. The shell-type exhaust noise reduction device according to claim 1, characterized in that: A first through hole is provided on the upper inner shell, one end of the intake pipe extends radially to form a limiting protrusion, one end of the intake pipe passes through the first through hole, the limiting protrusion abuts the edge of the first through hole, the limiting protrusion position of the intake pipe is welded to the edge position of the first through hole, and the other end of the intake pipe is connected to the other end of the inner exhaust pipe.

4. The shell-type exhaust noise reduction device according to claim 1, characterized in that: A second through hole is provided on the upper 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.

5. The shell-type exhaust noise reduction device according to claim 1, 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.

6. A compressor comprising a core assembly, characterized in that: The compressor further comprises the shell-type exhaust noise reduction device according to any one of claims 1 to 5, and the core assembly is located inside the second cavity.

7. A compressor according to claim 6, characterized in that: The compressor is assembled and formed by the following steps: Connect the upper outer shell to the air outlet pipe, connect the upper inner shell to the air inlet pipe, and seal the edge of the upper inner shell to the edge of the upper outer shell; Assemble the core assembly inside the lower shell, and connect one end of the inner exhaust pipe to the exhaust muffler cavity, wherein the inner exhaust pipe can be elastically deformed; A gap is left between the upper inner shell and the lower shell, and the other end of the inner exhaust pipe is connected to the intake pipe through the gap; The edge of the upper shell is matched with the edge of the lower shell, and the inner exhaust pipe is elastically deformed.

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