Silencer and refrigerator nitrogen making module

Abstract

The silencer comprises a flat silencer body, the silencer body is provided with an air inlet and an air outlet, and the air inlet and the air outlet are formed in the two ends, in the length direction of the silencer body, of the silencer body in a staggered mode; wherein the silencer body is internally provided with a streaming rib, a silencing channel is defined between the streaming rib and the silencer body, and the air inlet and the air outlet are in one-way communication through the silencing channel. In this way, on one hand, the overall size of the silencer can be reduced, the silencer is suitable for being assembled in a relatively narrow and flat space, and the use requirement for assembling in a refrigerator nitrogen making module is met; and on the other hand, the path of gas from the gas inlet to the gas outlet can be prolonged, transmission of pneumatic noise from the gas outlet to the gas inlet is weakened, and therefore the good noise reduction effect can be achieved when the silencer works.

Description

Technical Field

[0001] This utility model belongs to the technical field of nitrogen preservation in refrigerators, and in particular relates to a muffler and a nitrogen generation module for refrigerators. Background Technology

[0002] Existing PSA (Pressure Swing Adsorption) nitrogen generation systems are generally industrial nitrogen production systems. The pneumatic noise is generated by high-power compressors (generally above 60 dB). Therefore, the silencers used in PSA nitrogen generation systems are generally large in size. The silencer is a cylinder with a diameter of 60 mm to 30 mm. The air outlet of the silencer is located at the center of the bottom surface of one end of the cylinder, perpendicular to the bottom surface, and is directly connected to the air inlet of the compressor by a thread. The air inlet of the silencer is located on the top surface of the other end of the cylinder, perpendicular to the top surface. In addition, the inside of the cylinder is generally equipped with a circular air filter.

[0003] When miniaturizing PSA technology and applying it to nitrogen generation and preservation in refrigerators, the application environment of the PSA nitrogen generation system in refrigerators is limited. If the silencer structure used in the industrial PSA nitrogen generation is adopted, the silencer's shape determines its large size, the inlet and outlet are vertical, and the assembly requires a lot of space, making it impossible to assemble and apply in the relatively small and flat space of a refrigerator. Moreover, if the silencer is scaled down proportionally, the noise reduction effect is only 2-3 dB. Since refrigerators are used in home environments, the noise reduction effect of the silencer will ultimately cause significant noise interference. Utility Model Content

[0004] In view of this, it is necessary to provide a muffler and a refrigerator nitrogen generator module for solving the above-mentioned technical problems.

[0005] A muffler is used in a refrigerator nitrogen generation module. The muffler includes a flat muffler body with an air inlet and an air outlet. The air inlet and the air outlet are arranged at opposite ends of the muffler body along its length.

[0006] The muffler body is provided with flow-around ribs, and the flow-around ribs and the muffler body form a silencing channel. Furthermore, the air inlet and the air outlet are connected unidirectionally through the silencing channel.

[0007] Understandably, designing the muffler body as flat and staggering the air inlet and outlet reduces the overall size of the muffler, making it suitable for assembly in relatively small, flat spaces and meeting the requirements for installation in refrigerator nitrogen generator modules. Furthermore, the muffler uses a silencing channel to achieve a tortuous, reciprocating airflow path between the inlet and outlet during operation. This extends the gas path from the inlet to the outlet and reduces the transmission of aerodynamic noise from the outlet to the inlet, resulting in a better noise reduction effect during operation.

[0008] In one embodiment, the number of flow-redirecting ribs is configured to be multiple, and the multiple flow-redirecting ribs are arranged sequentially at intervals along the width direction of the muffler body, and one end of the multiple flow-redirecting ribs is alternately connected and sealed to the muffler body in the length direction of the muffler body.

[0009] Understandably, arranging multiple flow-around ribs alternately within the muffler body can further extend the path of the gas from the inlet to the outlet, thereby further improving the noise reduction effect of the muffler during operation.

[0010] In one embodiment, the muffler body includes a housing and a cover, the cover being disposed on the open side of the housing and connected and sealed to the housing.

[0011] In one embodiment, the muffler body further includes a sealing ring, which is disposed between the housing and the lid in a compression deformation manner for assembling and sealing the housing and the lid.

[0012] It is understandable that a sealing ring is used to achieve the assembly seal between the box body and the lid. This ensures the sealing of the assembly between the box body and the lid, prevents air leakage when gas passes through the silencer body, and ensures the silencer's noise reduction function during operation.

[0013] In one embodiment, the muffler further includes an air inlet pipe and an air outlet pipe. The air inlet pipe passes through the bottom of the housing and is integrally connected to the housing. The air outlet pipe passes through the housing cover and is integrally connected to the housing cover.

[0014] The air inlet is located on the air inlet pipe, and the air outlet is located on the air outlet pipe.

[0015] In one embodiment, the lengths of the air inlet pipe and the air outlet pipe are 1 / 2 to 1 / 4 of the length of the muffler body.

[0016] In one embodiment, the length of the muffler body does not exceed 150mm, the width of the muffler body does not exceed 60mm, the thickness of the muffler body does not exceed 30mm, and the wall thickness of the muffler body is between 1.2mm and 3mm.

[0017] In one embodiment, the air inlet and the air outlet are located diagonally opposite to each other on the muffler body;

[0018] The air inlet and / or the air outlet are configured as circular holes, and the diameter of the circular holes does not exceed 6 mm.

[0019] In one embodiment, one end of the flow-around rib is connected and sealed to the muffler body along the length direction of the muffler body, and a preset gap D is formed between the other end of the flow-around rib and the muffler body along the length direction of the muffler body, wherein 10mm≥D≥3mm;

[0020] The flow-around ribs are connected and sealed to the muffler body at both ends in the width direction of the muffler body.

[0021] In addition, this application also provides a refrigerator nitrogen generation module, including the silencer described above.

[0022] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0023] The silencer and refrigerator nitrogen generator module claimed in this application are designed with a flat body and the air inlet and outlet on the silencer body are staggered. This reduces the overall volume of the silencer, making it suitable for assembly in relatively small, flat spaces and meeting the usage requirements for assembly in refrigerator nitrogen generator modules. Furthermore, the silencer uses a silencing channel to achieve a tortuous and reciprocating air path between the air inlet and outlet during operation. This extends the path of the gas from the air inlet to the outlet and reduces the transmission of aerodynamic noise from the outlet to the air inlet, resulting in a better noise reduction effect when the silencer is working. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a silencer provided in an embodiment of this application.

[0026] Figure 2 This is a cross-sectional view of a muffler provided in an embodiment of this application.

[0027] Reference numerals: 100, muffler; 10, muffler body; 110, air inlet pipe; 120, air outlet pipe; 11, housing; 111, opening; 112, bottom of housing; 12, housing cover; 13, sealing ring; 20, flow-through rib; 101, air inlet; 102, air outlet; 103, muffler channel. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that when a component is said to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "located on" another component, it can be directly located on the other component or may have an intervening component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or may have an intervening component.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] The silencer 100 claimed in this application is used in a refrigerator nitrogen generator module to reduce noise during the extraction of gas from the refrigerator nitrogen generator module.

[0032] like Figure 1 , Figure 2As shown, a muffler 100 provided in one embodiment of this application includes a flat muffler body 10. The muffler body 10 has an air inlet 101 and an air outlet 102, which are arranged at opposite ends of the muffler body 10 along its length. A flow-around rib 20 is provided inside the muffler body 10, and the flow-around rib 20 and the muffler body 10 enclose a silencing channel 103. The air inlet 101 and the air outlet 102 are connected unidirectionally through the silencing channel 103. In other words, the muffler 100 can transmit gas introduced through the air inlet 101 via the silencing channel 103, and then discharge it outwards through the air outlet 102. During this process, the silencing channel 103 can reduce noise during gas transmission.

[0033] As can be seen from the above, the muffler 100 of this application has a flat muffler body 10 and the air inlet 101 and air outlet 102 on the muffler body 10 are staggered. This reduces the overall volume of the muffler 100, making it suitable for assembly in a relatively small flat space and meeting the usage requirements for assembly in a refrigerator nitrogen generator module. Furthermore, when the muffler 100 is working, the muffler channel 103 is used to achieve a tortuous and reciprocating transmission of air between the air inlet 101 and the air outlet 102. This extends the path of gas from the air inlet 101 to the air outlet 102 and reduces the transmission of aerodynamic noise from the air outlet 102 to the air inlet 101, so that the muffler 100 can achieve a better noise reduction effect when it is working.

[0034] It should be noted that silencers primarily utilize the magnitude of acoustic impedance to reduce noise. Specifically, the abrupt change in the silencer's cross-section causes impedance mismatch in the silencing system, resulting in sound wave reflection and interference, thereby reducing the sound energy radiated outwards from the silencer. When the sound wave wavelength is much larger than the dimensions of various parts of the silencer, the air column in the outer circular tube moves like a piston. Combinations of circular tubes with different diameters and expansion chambers are equivalent to combinations of different acoustic qualities and acoustic compliance. Appropriate combinations can prevent noise of certain frequencies from passing through the silencer, achieving a silencing effect. Furthermore, according to physics, aerodynamic noise is often a superposition of many frequencies. For a specific diameter outer circular tube and a silencer with a specific cross-section, many frequencies still pass through. These frequencies will pass through the silencer without attenuation. When the length of the inner circular tube is half the length of the silencer, it can eliminate frequencies where n is odd in the following formula. When the length of the inner circular tube is one-quarter the length of the silencer, it can eliminate frequencies where n is even in the following formula. Combining these two factors yields a more ideal silencing effect.

[0035] like Figure 1 , Figure 2As shown, in one embodiment, the muffler body 10 includes a housing 11 and a cover 12. The cover 12 is disposed on the opening 111 side of the housing 11 and is connected and sealed to the housing 11, so that the housing 11 and the cover 12 together can enclose a sealed chamber capable of reducing noise. Here, the cover 12 and the housing 11 can be connected and fixed by bolts, welding or other methods.

[0036] In this embodiment, the muffler body 10 also includes a sealing ring 13, which is disposed between the housing 11 and the cover 12 in a compression deformation manner to seal the housing 11 and the cover 12. This ensures the sealing between the housing 11 and the cover 12, prevents gas leakage when passing through the muffler body 10, and ensures the muffler function when the muffler 100 is working.

[0037] like Figure 1 , Figure 2 As shown, in one embodiment, the muffler 100 further includes an inlet pipe 110 and an outlet pipe 120. The inlet pipe 110 passes through the bottom 112 of the housing 11 and is integrally connected to the housing 11. The outlet pipe 120 passes through the cover 12 and is integrally connected to the cover 12. An inlet 101 is located on the inlet pipe 110, and an outlet 102 is located on the outlet pipe 120. In other words, the inlet pipe 110 and the outlet pipe 120 of the muffler 100 are staggered and extend along the length of the muffler body 10. This allows the muffler 100 to be assembled in a flat, compact space and meets the usage requirements for assembly in a refrigerator nitrogen generator module.

[0038] In this embodiment, the lengths of the intake pipe 110 and the exhaust pipe 120 are 1 / 2 to 1 / 4 of the length of the muffler body 10.

[0039] like Figure 1 , Figure 2 As shown, in one embodiment, the air inlet 101 and the air outlet 102 are located at opposite corners of the muffler body 10. This extends the distance between the air inlet 101 and the air outlet 102 in the width direction of the muffler body 10, giving the muffler body 10 a sufficiently large space to arrange the flow-around ribs 20, and creating conditions for extending the path of the muffler channel 103 in the future.

[0040] In this embodiment, the air inlet 101 and / or the air outlet 102 are configured as circular holes, and the diameter of the circular holes does not exceed 6 mm. Correspondingly, the air inlet pipe 110 and the air outlet pipe 120 are also configured as cylindrical structures.

[0041] In this application, the length of the muffler body 10 does not exceed 150mm, the width of the muffler body 10 does not exceed 60mm, the thickness of the muffler body 10 does not exceed 30mm, and the wall thickness of the muffler body 10 is between 1.2mm and 3mm.

[0042] It should be noted that the main structure, maximum size and airflow direction of the muffler 100 of this application all occur in the length direction of the muffler body 10, and the width and thickness of the muffler body 10 are significantly smaller than the length of the muffler body 10, while the thickness of the muffler body 10 is particularly small. This allows the muffler 100 to be easily installed in a flat space.

[0043] like Figure 1 , Figure 2 As shown, in one embodiment, the number of flow-around ribs 20 is configured to be multiple, and the multiple flow-around ribs 20 are arranged at intervals along the width direction of the muffler body 10; and one end of the multiple flow-around ribs 20 is alternately connected and sealed to the muffler body 10 in the length direction of the muffler body 10. In this way, the internal cavity of the muffler body 10 can be formed into a tortuous reciprocating unidirectional communication silencing channel 103 from the air inlet 101 to the air outlet 102. Thus, the path of gas from the air inlet 101 to the air outlet 102 can be further extended, which can further improve the noise reduction effect that the muffler 100 can achieve when it is working.

[0044] In this embodiment, the number of flow-around ribs 20 is configured as three, with two flow-around ribs 20 disposed inside the housing 11 of the muffler body 10, and the remaining flow-around rib 20 disposed on the cover of the muffler body 10. It should be noted that the number of flow-around ribs 20 can also be configured as two, four, five, or even more, which will not be elaborated here.

[0045] It should be noted that, through the structural arrangement of the aforementioned flow-around ribs 20, the silencer 100 of this application effectively connects the two end faces of the silencer body 10 in the thickness direction by connecting the flow-around ribs 20 to the box 11 of the silencer body 10. The two end faces form a high-strength whole. When airflow passes through and noise propagates inside the silencer body 10, the wall of the silencer body 10 is effectively reinforced and will not resonate due to airflow noise, thereby avoiding the generation and propagation of resonance noise and further reducing noise.

[0046] In this embodiment, the flow-around rib 20 is connected and sealed to the muffler body 10 at one end along the length direction, and a preset gap D is formed between the flow-around rib 20 and the muffler body 10 at the other end along the length direction, wherein 10mm≥D≥3mm; the flow-around rib 20 is connected and sealed to the muffler body 10 at both ends along the width direction.

[0047] In addition, this application also provides a refrigerator nitrogen generator module, including the aforementioned muffler 100. Here, the air inlet 101 of the muffler 100 is connected to the refrigerator compartment or other space that can provide an air source for the air pump (not shown) in the refrigerator nitrogen generator module, and the air outlet 102 of the muffler 100 is connected to the air inlet of the air pump to provide air for the refrigerator nitrogen generator module. It can be understood that in other embodiments, the muffler 100 can also be installed at the oxygen exhaust end of the refrigerator nitrogen generator module, wherein the air inlet 101 of the muffler 100 is connected to the oxygen exhaust port of the molecular sieve in the refrigerator nitrogen generator module, and the air outlet 102 of the muffler 100 is connected to the space such as the refrigerator compartment.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present utility model and are not intended to limit the present utility model. Any appropriate changes and variations made to the above embodiments within the scope of the essential spirit of the present utility model shall fall within the scope of protection claimed by the present utility model.

Claims

1. A silencer, used in a refrigerator nitrogen generator module, characterized in that, The muffler (100) includes a flat muffler body (10), the muffler body (10) having an air inlet (101) and an air outlet (102), the air inlet (101) and the air outlet (102) being arranged in a staggered manner at both ends of the muffler body (10) in the length direction of the muffler body (10); The muffler body (10) is provided with a flow-around rib (20), and the flow-around rib (20) and the muffler body (10) enclose a muffler channel (103). Furthermore, the air inlet (101) and the air outlet (102) are connected unidirectionally through the muffler channel (103).

2. The silencer according to claim 1, characterized in that, The number of the flow-around ribs (20) is configured to be multiple, and the multiple flow-around ribs (20) are arranged sequentially at intervals along the width direction of the muffler body (10), and one end of the multiple flow-around ribs (20) is alternately connected and sealed to the muffler body (10) in the length direction of the muffler body (10).

3. The silencer according to claim 1, characterized in that, The muffler body (10) includes a box body (11) and a box cover (12). The box cover (12) is disposed on the opening (111) side of the box body (11) and is connected and sealed to the box body (11).

4. The silencer according to claim 3, characterized in that, The muffler body (10) also includes a sealing ring (13), which is disposed between the box body (11) and the box cover (12) in a compression deformation manner, for assembling and sealing the box body (11) and the box cover (12).

5. The silencer according to claim 3, characterized in that, The silencer (100) also includes an air inlet pipe (110) and an air outlet pipe (120). The air inlet pipe (110) is disposed through the bottom (112) of the box body (11) and is connected to the box body (11) as a whole. The air outlet pipe (120) is disposed through the box cover (12) and is connected to the box cover (12) as a whole. The air inlet (101) is disposed on the air inlet pipe (110), and the air outlet (102) is disposed on the air outlet pipe (120).

6. The silencer according to claim 5, characterized in that, The lengths of the air inlet pipe (110) and the air outlet pipe (120) are 1 / 2 to 1 / 4 of the length of the muffler body (10).

7. The silencer according to claim 1, characterized in that, The length of the muffler body (10) does not exceed 150mm, the width of the muffler body (10) does not exceed 60mm, the thickness of the muffler body (10) does not exceed 30mm, and the wall thickness of the muffler body (10) is between 1.2mm and 3mm.

8. The silencer according to claim 1, characterized in that, The air inlet (101) and the air outlet (102) are located at diagonal positions on the muffler body (10); The air inlet (101) and / or the air outlet (102) are configured as circular holes, and the diameter of the circular holes does not exceed 6 mm.

9. The silencer according to claim 1, characterized in that, The flow-around rib (20) is connected and sealed to the muffler body (10) at one end along the length direction of the muffler body (10), and a preset gap D is formed between the flow-around rib (20) and the muffler body (10) at the other end along the length direction of the muffler body (10), wherein 10mm≥D≥3mm; The flow-through ribs (20) are connected and sealed to the muffler body (10) at both ends in the width direction.

10. A refrigerator nitrogen generator module, characterized in that, Includes the muffler (100) as described in any one of claims 1 to 9.

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