Silencing device and refrigerator thereof
By designing a silencer device in the refrigerator nitrogen production device, using the combination of the housing and reinforcement components, the problem of air pump noise pollution is solved, and effective noise reduction and resonance noise prevention is achieved.
Patent Information
- Application Number
- CN202421797148.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The air pump in the existing refrigerator nitrogen-based oxygen control module will generate obvious airflow noise when it is running, resulting in serious noise pollution.
A sound silencer device is designed to act as a sound silencer chamber through the housing, allowing the air flow generated by the air pump to enter the housing through the intake pipe, and a sound wave reflection is used to achieve sound silence and noise reduction, and a reinforcement component is provided inside the housing to prevent the generation of resonant noise.
It effectively reduces the noise generated by the air pump in the refrigerator's nitrogen production device, realizes the sound silencing effect, and avoids the generation of resonant noise by strengthening the use of components.
Smart Images
Figure CN223022901U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of nitrogen generation and oxygen control in refrigerators, in particular to a sound insulation device and a refrigerator thereof. Background Art
[0002] In order to improve the freshness preservation effect of food, many refrigerators adopt a scheme of controlling the oxygen content inside and creating a low-oxygen and high-nitrogen environment to improve the freshness preservation performance.
[0003] The existing refrigerators use a PSA nitrogen generation and oxygen control module that can be placed inside the refrigerating chamber to control the oxygen in the refrigerating chamber. This freshness preservation module has a high degree of integration. Structures such as an air pump, a molecular sieve tower, and a solenoid valve are all arranged within the same framework, and then the framework is assembled inside the refrigerator. It has the characteristics of high reliability, easy disassembly and replacement, and convenient production. However, when the air pump operates, it will generate obvious airflow noise, and the loudness can reach more than 70 db, resulting in serious noise pollution. Summary of the Utility Model
[0004] Based on this, in view of the above technical problems, the utility model provides a sound insulation device.
[0005] A sound insulation device is communicated with a nitrogen generation device of a refrigerator and includes: a housing including a first cover body and a second cover body, the first cover body and the second cover body are snap-connected to form a cavity, and an air inlet and an air outlet communicated with the cavity are formed on the housing; an air inlet pipe, one end of which is communicated with the air inlet, and the other end of which is used for communicating with the nitrogen generation device of the refrigerator; an air outlet pipe, one end of which is communicated with the air outlet, and the other end of which is used for communicating with an external pipeline; a strengthening component located between the first cover body and the second cover body and connected to the first cover body and the second cover body.
[0006] With such a setting, the air inlet pipe is communicated with the nitrogen generation device of the refrigerator, and the airflow generated by the air pump in the nitrogen generation device of the refrigerator can enter the cavity through the air inlet pipe and flow out from the air outlet pipe. Since there is a sudden change in the pipe cross-section (i.e., the flow area) during the process of the gas from the air inlet pipe to the cavity, the impedance mismatch of the pipe system occurs, resulting in sound wave reflection and interference phenomena, thereby reducing the sound energy radiated outward by the sound insulation device, and thus achieving sound insulation and noise reduction. Moreover, there is a strengthening component between the first cover body and the second cover body, and the connection of the strengthening component makes the relative position between the first cover body and the second cover body stable and the structural strength higher. Therefore, the strengthening component can prevent the first cover body and the second cover body from resonating with the sound wave, that is, prevent the generation of resonance noise.
[0007] In one of the embodiments, the middle part of the first cover body is recessed towards the second cover body to form a first recessed structure, the middle part of the second cover body is recessed towards the second cover body to form a second recessed structure, and the first recessed structure and the second recessed structure are abutted to form the strengthening component.
[0008] In one embodiment, the first recessed structure has a first groove, the diameter of the first groove gradually decreases along the direction close to the second cover body, the second recessed structure has a second groove, and the diameter of the second groove gradually decreases along the direction close to the first cover body.
[0009] In one embodiment, the reinforcing assembly further includes a fastener, and the fastener penetrates and connects the first recessed structure and the second recessed structure.
[0010] In one embodiment, the first recessed structure and the second recessed structure are integrally formed; and / or, the first cover body and the second cover body are integrally formed.
[0011] In one embodiment, the intake pipe is in movable abutment with the intake port and can move along the axial direction of the intake port; the outlet pipe is in movable abutment with the outlet port and can move along the axial direction of the outlet port.
[0012] In one embodiment, the intake port and the outlet port are respectively opened on both sides of the housing in the length direction and are diagonally arranged, and the intake pipe and the outlet pipe are arranged in parallel.
[0013] In one embodiment, the axial directions of the intake pipe and the outlet pipe are defined as the first direction, the length of the housing in the first direction is H, and the lengths of the intake pipe and the outlet pipe extending out of the housing are 1 / 2H or 1 / 4H.
[0014] In one embodiment, both the first cover body and the second cover body are provided with a wavy structure.
[0015] The present utility model further provides a refrigerator, including the silencing device and a refrigerator nitrogen generation device as described above.
[0016] Compared with the prior art, the present utility model uses the housing as a sound insulation chamber, allows the airflow generated by the air pump to enter the housing through the intake pipe, and realizes sound insulation and noise reduction through the sound wave reflection generated by the housing. And a reinforcing assembly is arranged inside the housing, and the structural strength of the housing is enhanced through the reinforcing assembly to prevent the first cover body and the second cover body of the housing from resonating with the sound waves, that is, to prevent the generation of resonance noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a schematic structural diagram of one embodiment of the silencing device provided by the present utility model;
[0018] Figure 2The front view cross-sectional view of one embodiment of the sound insulation device provided by the present utility model;
[0019] Figure 3 The top view cross-sectional view of one embodiment of the sound insulation device provided by the present utility model;
[0020] Figure 4 The side view of one embodiment of the sound insulation device provided by the present utility model;
[0021] Figure 5 The top view of one embodiment of the sound insulation device provided by the present utility model.
[0022] The meanings of the symbols in the figure are as follows:
[0023] 100, sound insulation device; 10, housing; 11, first cover; 12, second cover; 13, cavity; 14, air inlet; 15, air outlet; 20, intake pipe; 30, outlet pipe; 40, strengthening component; 41, first concave structure; 411, first groove; 42, second concave structure; 421, second groove; 43, fastener. Detailed implementation manners
[0024] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0025] It should be noted that when a mechanism is referred to as "fixed to" or "disposed on" another mechanism, it can be directly on the other mechanism or there may also be an intermediate mechanism. When a mechanism is considered to be "connected" to another mechanism, it can be directly connected to the other mechanism or there may be an intermediate mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.
[0026] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0027] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is indirectly in contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.
[0028] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.
[0029] Please refer to Figures 1-5 , the present utility model provides a silencing device 100, which is used to communicate with a nitrogen generation device of a refrigerator and is used to eliminate the noise generated by an air pump in the nitrogen generation device of the refrigerator so as to achieve a noise reduction effect.
[0030] The silencing device 100 includes a housing 10, an air inlet pipe 20, an air outlet pipe 30 and a strengthening component 40. The housing 10 includes a first cover body 11 and a second cover body 12. The first cover body 11 and the second cover body 12 are snap-connected and form a cavity 13. An air inlet 14 and an air outlet 15 communicating with the cavity 13 are formed on the housing 10. One end of the air inlet pipe 20 is communicated with the air inlet 14, and the other end is used to communicate with the nitrogen generation device of the refrigerator. One end of the air outlet pipe 30 is communicated with the air outlet 15, and the other end is used to communicate with an external pipeline. The strengthening component 40 is located between the first cover body 11 and the second cover body 12 and is connected to the first cover body 11 and the second cover body 12.
[0031] In this way, the air inlet pipe 20 is communicated with the nitrogen generation device of the refrigerator, and the airflow generated by the air pump in the nitrogen generation device of the refrigerator can enter the cavity 13 through the air inlet pipe 20 and flow out from the air outlet pipe 30. Since there is a sudden change in the cross-section of the pipeline (i.e., the flow area) during the process of the gas from the air inlet pipe 20 to the cavity 13, the impedance mismatch of the pipeline system occurs, resulting in acoustic wave reflection and interference phenomena, thereby reducing the sound energy radiated by the silencing device 100 to the outside, and thus achieving noise reduction. Moreover, there is a strengthening component 40 between the first cover body 11 and the second cover body 12. The connection of the strengthening component 40 makes the relative position between the first cover body 11 and the second cover body 12 stable and the structural strength higher. Therefore, the strengthening component 40 can prevent the first cover body 11 and the second cover body 12 from resonating with the sound wave, that is, preventing the generation of resonance noise.
[0032] Furthermore, the middle part of the first cover body 11 is recessed towards the second cover body 12 to form a first recessed structure 41, and the middle part of the second cover body 12 is recessed towards the second cover body 12 to form a second recessed structure 42. The first recessed structure 41 and the second recessed structure 42 abut against each other to form a reinforcing assembly 40. In this way, since the middle parts of the first cover body 11 and the second cover body 12 have the strongest resonance, the first recessed structure 41 and the second recessed structure 42 are respectively formed in the middle parts of the first cover body 11 and the second cover body 12, which can best reduce the resonance phenomenon between the first cover body 11 and the second cover body 12. And the reinforcing assembly 40 arranged in this way is directly formed by the first cover body 11 and the second cover body 12, and the structure is simpler and more stable. In addition, the first recessed structure 41 and the second recessed structure 42 can also improve the structural strength of the first cover body 11 and the second cover body 12 and enhance their bending resistance.
[0033] Of course, in other embodiments, the first cover body 11 and the second cover body 12 can also be directly connected by a fastener 43, and the fastener 43 is preferably arranged in the middle parts of the first cover body 11 and the second cover body 12.
[0034] Furthermore, the first recessed structure 41 has a first groove 411, and the diameter of the first groove 411 gradually decreases along the direction close to the second cover body 12. The second recessed structure 42 has a second groove 421, and the diameter of the second groove 421 gradually decreases along the direction close to the first cover body 11. In this way, the influence of the first recessed structure 41 and the second recessed structure 42 on the volume of the cavity 13 is reduced, the sound absorption effect of the sound absorption device 100 is ensured, and the processing is convenient.
[0035] It can be understood that, in other embodiments, the first groove 411 and the second groove 421 can also be set as cylindrical groove structures with a constant inner diameter along the axis, or rectangular groove structures, etc., and are not limited to the above shapes.
[0036] Furthermore, the reinforcing assembly 40 further includes a fastener 43, and the fastener 43 passes through and connects the first recessed structure 41 and the second recessed structure 42. In this way, the fastener 43 further ensures the connection strength and abutting stability between the first recessed structure 41 and the second recessed structure 42, thereby further reducing the resonance phenomenon and avoiding resonance noise.
[0037] Due to the combination of intake pipes 20 with different diameters, intake pipes 20 with different axial lengths, and cavities 13 with different volumes, it is equivalent to a combination of different acoustic masses and compliances. An appropriate combination can prevent noise of certain frequencies from passing through the silencing device 100, thereby achieving noise reduction. Based on this principle, the intake pipe 20 is movably abutted against the air inlet 14 and can move along the axis of the air inlet 14; the outlet pipe 30 is movably abutted against the air outlet 15 and can move along the axis of the air outlet 15. In this way, the intake pipe 20 and the outlet pipe 30 can adjust the noise reduction for noises with different compliances by moving their positions axially.
[0038] Specifically, the air inlet 14 and the air outlet 15 are respectively provided on both sides in the length direction of the housing 10 and are diagonally arranged, and the intake pipe 20 and the outlet pipe 30 are arranged in parallel. In this way, the gas needs to flow diagonally from one end of the housing 10 to the other end diagonally, and its flow path is relatively long. Moreover, the parallel intake pipe 20 and outlet pipe 30 are also convenient for adjusting the positions, so as to achieve a better noise reduction effect.
[0039] Exemplarily, define the axis of the intake pipe 20 and the outlet pipe 30 as the first direction, the length of the housing 10 in the first direction is H, and the lengths of the intake pipe 20 and the outlet pipe 30 extending out of the housing 10 are 1 / 2H or 1 / 4H. According to the definition of the transmission loss of the silencing device 100, according to the definition of the transmission loss of the muffler, the transmission loss of a single-stage expansion muffler In the formula, is called the expansion ratio of the reactive silencing device 100.
[0040] It can be seen from the above formula that when the cross-section of the pipe shrinks or expands by m times, the noise reduction effect is the same. In engineering, in order to reduce the resistance to the air flow, an expansion pipe is commonly used (that is, the volume of the housing 10 is larger than that of the circular pipe). According to the above formula, when kl = (2n + 1)π / 2, that is, l = (2n + 1)λ / 4 (n = 0, 1, 2,...), sinkl = 1, and TL reaches the maximum value. When kl = nπ, that is, l = nλ / 2, TL = 0, that is, the sound wave passes through without attenuation. Therefore, the pneumatic noise is the superposition of many frequencies. For the outer intake pipe 20 with a specific diameter and the housing 10 with a specific cross-section, there are still many passing frequencies, that is, the sound waves of the passing frequencies will pass through the housing 10 without attenuation. When the length of the intake pipe 20 extending out is 1 / 2H, the passing frequencies with n being odd in the above formula can be eliminated. When the length of the intake pipe 20 extending out is 1 / 4H, the passing frequencies with n being even in the above formula can be eliminated. Combining the two can obtain an ideal noise reduction effect.
[0041] In addition, the first concave structure 41 and the second concave structure 42 are integrally formed; and / or, the first cover body 11 and the second cover body 12 are integrally formed. In this way, if the first concave structure 41 and the second concave structure 42 are integrally formed, the abutting effect between the two directly becomes a connecting effect, and the forces acting towards each other or away from each other can be evenly distributed to further improve the structural strength of the sound absorption device 100. Similarly, the integral formation of the first cover body 11 and the second cover body 12 also makes the sound absorption device 100 more integral, with better durability and structural strength.
[0042] Both the first cover body 11 and the second cover body 12 are arranged in a wavy structure. In this way, the structural strength of the first housing 10 and the second housing 10 is higher, the bending resistance performance is stronger, and the sound absorption and noise reduction effect is also better.
[0043] In this embodiment, the length of the housing 10 does not exceed 150 mm, the width does not exceed 60 mm, the thickness does not exceed 30 mm, and the wall thickness is between 1.2 mm and 3 mm, so as to ensure the structural strength while not wasting consumables, and the difference in the flow area formed with the intake pipe 20 and the outlet pipe 30 ensures the sound absorption and noise reduction effect. The lengths of the intake pipe 20 and the outlet pipe 30 located inside the housing 10 are at least 150 mm, and the diameters are between 2 and 6 mm. Therefore, the sizes of the air inlet 14 and the air outlet 15 are also within 6 mm.
[0044] The present utility model also provides a refrigerator, including the sound absorption device 100 as described above and a refrigerator nitrogen generation device.
[0045] Compared with the prior art, the present utility model uses the housing 10 as a sound absorption chamber, allowing the airflow generated by the air pump to enter the housing 10 through the intake pipe 20, and realizing sound absorption and noise reduction through the sound wave reflection generated by the housing 10. And a strengthening component 40 is arranged inside the housing 10. By enhancing the structural strength of the housing 10 through the strengthening component 40, resonance between the first cover body 11 and the second cover body 12 of the housing 10 and the sound waves is avoided, that is, the generation of resonance noise is prevented.
[0046] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, 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, it should be considered as the scope recorded in this specification.
[0047] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.
Claims
1. A muffler device connected to a refrigerator nitrogen generator, characterized in that: include: A housing (10) comprising a first cover (11) and a second cover (12), wherein the first cover (11) and the second cover (12) are buckled and connected to form a cavity (13), and the housing (10) is provided with an air inlet (14) and an air outlet (15) which are in communication with the cavity (13); An air inlet pipe (20), one end of which is connected to the air inlet (14) and the other end of which is connected to a nitrogen generator of the refrigerator; An air outlet pipe (30), one end of which is connected to the air outlet (15) and the other end of which is used to connect to an external pipeline; The reinforcing assembly (40) is located between the first cover body (11) and the second cover body (12), and is connected to the first cover body (11) and the second cover body (12).
2. The silencing device according to claim 1, characterized in that: The middle portion of the first cover body (11) is recessed toward the second cover body (12) to form a first recessed structure (41), and the middle portion of the second cover body (12) is recessed toward the second cover body (12) to form a second recessed structure (42), and the first recessed structure (41) and the second recessed structure (42) are in contact with each other to form the reinforcing assembly (40).
3. The silencing device according to claim 2, characterized in that: The first recessed structure (41) comprises a first groove (411), the diameter of which gradually decreases along a direction approaching the second cover body (12), and the second recessed structure (42) comprises a second groove (421), the diameter of which gradually decreases along a direction approaching the first cover body (11).
4. The silencing device according to claim 2 or 3, characterized in that: The reinforcing assembly (40) further comprises a fastener (43), wherein the fastener (43) penetrates through and connects the first recessed structure (41) and the second recessed structure (42).
5. The silencing device according to claim 2, characterized in that: The first recessed structure (41) and the second recessed structure (42) are integrally formed; and / or, The first cover body (11) and the second cover body (12) are integrally formed.
6. The silencing device according to claim 1, characterized in that: The air inlet pipe (20) is movably in contact with the air inlet (14) and is movable along the axial direction of the air inlet (14); The air outlet pipe (30) is movably in contact with the air outlet (15) and is capable of moving along the axial direction of the air outlet (15).
7. The silencing device according to claim 6, characterized in that: The air inlet (14) and the air outlet (15) are respectively opened on both sides of the length direction of the shell (10) and are arranged diagonally, and the air inlet pipe (20) and the air outlet pipe (30) are arranged in parallel.
8. The silencing device according to claim 7, characterized in that: The axial direction of the air inlet pipe (20) and the air outlet pipe (30) is defined as a first direction, the length of the shell (10) in the first direction is H, and the length of the air inlet pipe (20) and the air outlet pipe (30) extending out of the shell (10) is 1 / 2H or 1 / 4H.
9. The silencing device according to claim 1, characterized in that: The first cover body (11) and the second cover body (12) are both configured as wave-shaped structures.
10. A refrigerator, characterized in that: The invention comprises a silencer device as described in any one of claims 1 to 9 and a refrigerator nitrogen generator.