Heat dissipation and noise reduction device of oxygen generator

Abstract

The embodiment of the utility model provides a heat dissipation and noise reduction device for an oxygen generator, and the device is arranged in an exhaust heat dissipation channel, and comprises a first perforated plate which is in a flat plate shape and is provided with a plurality of first exhaust holes penetrating through the first perforated plate, gas from one side of the first perforated plate can be exhausted to the other side of the first perforated plate through the plurality of first exhaust holes; and a first cavity part which is provided on the other side of the first perforated plate, and through which the gas is discharged. Therefore, a Helmholtz resonance structure is formed by the first perforated plate and the first cavity part, so that noise generated by equipment such as a compressor can be reduced in the exhaust heat dissipation channel, and exhaust heat dissipation and noise reduction can be realized.

Description

Technical Field

[0001] The present application relates to the field of oxygen concentrators, and in particular to a heat dissipation and noise reduction device for oxygen concentrators. Background Art

[0002] Oxygen concentrator is a type of machine that produces oxygen. It mainly uses the principle of pressure swing adsorption (PSA) to produce oxygen using air as raw material and molecular sieve as adsorbent. In order to discharge the high-temperature gas inside the machine, the current oxygen concentrator generally has an exhaust heat dissipation channel.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the present application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because they are described in the background technology section of the present application. Utility Model Content

[0004] However, the inventors found that the existing exhaust heat dissipation channel for oxygen concentrators is just an ordinary air channel, which only has the function of heat dissipation, and noise will leak along the exhaust heat dissipation channel, thereby causing the oxygen concentrator to have a high operating noise, affecting the overall quiet effect of the oxygen concentrator. Therefore, how to effectively reduce the noise of the oxygen concentrator while dissipating heat is a problem that needs to be solved.

[0005] In order to solve at least one of the above problems or other similar problems, an embodiment of the present application provides an oxygen generator heat dissipation and noise reduction device, which forms a Helmholtz resonance structure through a first perforated plate and a first cavity portion, thereby reducing the noise generated by equipment such as a compressor in the exhaust heat dissipation channel, which can not only exhaust heat but also reduce noise.

[0006] According to an embodiment of the present application, a heat dissipation and noise reduction device for an oxygen concentrator is provided, wherein the heat dissipation and noise reduction device for an oxygen concentrator is arranged in an exhaust heat dissipation channel of the oxygen concentrator, and the heat dissipation and noise reduction device for an oxygen concentrator comprises:

[0007] a first perforated plate, which is in a flat plate shape and has a plurality of first exhaust holes arranged therethrough, wherein gas from one side (upper side) of the first perforated plate can be discharged to the other side of the first perforated plate through the plurality of first exhaust holes; and

[0008] The first cavity portion is disposed on the other side (lower side) of the first perforated plate, and the gas is discharged through the first cavity portion.

[0009] In one or more embodiments, the plurality of first exhaust holes are evenly distributed over the first perforated plate, and a ratio of an area occupied by the plurality of first exhaust holes to a total area of ​​the first perforated plate is greater than a preset threshold.

[0010] In one or more embodiments, a porous sound absorbing material layer and / or a sound-absorbing baffle is arranged in the first cavity portion.

[0011] In one or more embodiments, the oxygen concentrator heat dissipation and noise reduction device further includes:

[0012] A second perforated plate, which is located on the other side (lower side) of the first cavity portion in the first direction, the second perforated plate is in a flat plate shape and has a plurality of second exhaust holes arranged therethrough; and

[0013] The second cavity portion is arranged on the other side (lower side) of the second perforated plate; wherein the gas in the first cavity portion is discharged through the second perforated plate and the second cavity portion.

[0014] In one or more embodiments, the plurality of second exhaust holes are distributed in a portion of the second perforated plate, and the second perforated plate includes at least two exhaust hole areas, and the at least two exhaust hole areas are spaced a predetermined distance apart.

[0015] In one or more embodiments, the perforation rate of the first perforated plate is 2 or 3 times the perforation rate of the second perforated plate.

[0016] In one or more embodiments, a porous sound absorbing material layer and / or a sound absorbing baffle is arranged in the second cavity portion.

[0017] In one or more embodiments, the oxygen concentrator heat dissipation and noise reduction device further includes:

[0018] The channel is arranged on the other side (lower side) of the second perforated plate and at least partially overlaps with the second cavity portion. The channel includes a bent flow channel so that the gas in the second cavity portion is refracted and then discharged.

[0019] In one or more embodiments, a silencer elbow is provided at the other end of the channel opposite to the end at which the gas is discharged.

[0020] One of the beneficial effects of the embodiment of the present application is that a Helmholtz resonance structure is formed by the first perforated plate and the first cavity portion, so that the noise generated by equipment such as a compressor can be reduced in the exhaust heat dissipation channel, which can not only exhaust heat but also reduce noise.

[0021] With reference to the following description and accompanying drawings, the specific embodiments of the present application are disclosed in detail, indicating the way in which the principles of the present application can be adopted. It should be understood that the embodiments of the present application are not therefore limited in scope. Within the scope of the spirit and clauses of the appended claims, the embodiments of the present application include many changes, modifications and equivalents.

[0022] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation of the present invention, and together with the text description, explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor. In the drawings:

[0024] Figure 1 is a cross-sectional schematic diagram of the oxygen concentrator 100 according to an embodiment of the present application along a first direction;

[0025] Figure 2 is a cross-sectional schematic diagram of the bottom shell and heat dissipation device of the oxygen concentrator according to the embodiment of the present application;

[0026] Figure 3 is a top view of the bottom shell and heat dissipation device of the oxygen concentrator according to the embodiment of the present application;

[0027] Figure 4 is a cross-sectional perspective view of the bottom shell and heat dissipation device of the oxygen concentrator according to the embodiment of the present application;

[0028] Figure 5 Schematic diagram of the second perforated plate 113 according to an embodiment of the present application. DETAILED DESCRIPTION

[0029] With reference to the accompanying drawings, the above and other features of the present invention will become apparent through the following description. In the description and the accompanying drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the attached claims.

[0030] In addition, in the figures used in the following description, since each structural element is made to be a size that can be recognized on the drawing, the scale varies according to each structural element, and the present application is not limited to the number of structural elements recorded in these figures, the shape of the structural elements, the ratio of the size of the structural elements, and the relative positional relationship of the structural elements.

[0031] In the embodiments of the present application, the term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "include", "comprises", "has", etc. refer to the existence of the stated features, elements, components or components, but do not exclude the existence or addition of one or more other features, elements, components or components.

[0032] In the embodiments of the present application, the singular forms "a", "the", etc. include plural forms and should be broadly understood as "a kind" or "a type" rather than being limited to the meaning of "one"; in addition, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least in part according to...", and the term "based on" should be understood as "at least in part based on...", unless the context clearly indicates otherwise.

[0033] In the embodiment of the present application, one side of the first direction (the up-down direction shown in the figure) of each component of the oxygen concentrator is, for example, the "lower side" of the component, and the other side of the first direction of each component is, for example, the "upper side" of the component. It is worth noting that the definition of each direction in this specification is only for the convenience of explaining the embodiment of the present application, and does not limit the direction of the oxygen concentrator when it is used and manufactured.

[0034] An embodiment of the present application provides a heat dissipation and noise reduction device for an oxygen generator.

[0035] Figure 1 is a cross-sectional schematic diagram of the oxygen concentrator 100 according to an embodiment of the present application along a first direction, Figure 2 is a cross-sectional schematic diagram of the bottom shell and heat dissipation device of the oxygen concentrator according to the embodiment of the present application. Figure 3 It is a top view of the bottom shell and heat dissipation device of the oxygen concentrator according to the embodiment of the present application. Figure 4 It is a cross-sectional stereoscopic view of the bottom shell and heat dissipation device of the oxygen concentrator according to the embodiment of the present application.

[0036] like Figures 1 to 3 As shown, the oxygen concentrator heat dissipation and noise reduction device 11 is arranged in the exhaust heat dissipation channel 12, and the oxygen concentrator heat dissipation and noise reduction device 11 includes: a first perforated plate 111 and a first cavity portion 112. The first perforated plate 111 is in a flat plate shape and is provided with a plurality of first exhaust holes 1111 penetrating the first perforated plate 111, wherein the gas from one side (upper side) of the first perforated plate 111 can be discharged to the other side (lower side) of the first perforated plate 111 through the plurality of first exhaust holes 1111. The first cavity portion 112 is arranged on the other side (lower side) of the first perforated plate 111, and the gas is discharged through the first cavity portion 112.

[0037] For example, Figure 1 and Figure 3As shown, the airflow passes through the compressor 13 in the exhaust and heat dissipation channel 12 , is discharged from the upper side of the first perforated plate 111 to the lower side of the first perforated plate 111 through the plurality of first exhaust holes 1111 , and then is discharged through the first cavity portion 112 .

[0038] The first perforated plate 111 and the first cavity portion 112 can be based on the Helmholtz resonance principle and theoretically calculated according to the frequency band of the noise to be reduced to obtain the corresponding parameter range combination of aperture D, hole spacing B, plate thickness T, and air layer thickness L behind the plate.

[0039] For example, in the Helmholtz resonator structure, a single resonator can be regarded as composed of several acoustic elements with different acoustic effects. The vibration and friction of air on the opening wall will cause sound energy loss due to the effects of viscous damping and heat conduction. Its acoustic effect is an acoustic resistance. When the frequency of the incident sound wave is close to the natural frequency of the resonator, the air column in the hole neck vibrates strongly. During the vibration process, the sound energy is consumed due to overcoming the friction resistance.

[0040] In the embodiment of the present application, the perforated plate is perforated on the thin plate and an air layer is arranged behind the plate. If necessary, a porous sound-absorbing material and / or a sound-absorbing baffle are added to the cavity to form a perforated plate resonant sound-absorbing structure. Since there is a corresponding cavity behind each opening, this perforated plate structure is a number of parallel Helmholtz resonators, and can therefore be regarded as a resonant system composed of mass and springs. When the frequency of the incident sound wave is consistent with the resonant frequency of the system, the air at the neck of the perforated plate produces intense vibration friction, which enhances the absorption effect and forms an absorption peak, which significantly attenuates the sound energy. If it is far away from the resonant frequency, the absorption effect is small. If a porous material is placed behind the perforated plate to increase the acoustic resistance, the frequency band of structural sound absorption will be widened.

[0041] For example, the following calculation formula is the calculation formula for the correlation coefficient of the Helmholtz resonance principle:

[0042]

[0043]

[0044]

[0045] ΔL: Amount of attenuation

[0046] f0: resonance cancellation frequency

[0047] α: Sound absorption coefficient

[0048] The above is an example of a Helmholtz resonator. For more details, please refer to the relevant technology. From this, the corresponding aperture D, hole spacing B, plate thickness T, and air layer thickness L of the exhaust hole can be calculated. In the embodiment of the present application, for example, the parameter ranges related to the first exhaust hole are: aperture D: 3mm-5mm, hole spacing B: 9-11mm, plate thickness T: 7mm-9mm, air layer thickness L behind the plate: 50mm-70mm, perforation rate: 20%-40%.

[0049] According to an embodiment of the present application, a Helmholtz resonance structure is formed by the first perforated plate 111 and the first cavity portion 112, so that the noise generated by equipment such as the compressor 13 can be reduced in the exhaust heat dissipation channel 12, which can not only dissipate exhaust heat but also reduce noise.

[0050] In one or more embodiments, the plurality of first exhaust holes 1111 are evenly distributed over the first perforated plate 111 , and a ratio of an area occupied by the plurality of first exhaust holes 1111 to a total area of ​​the first perforated plate 111 is greater than a preset threshold.

[0051] For example, Figure 3 As shown, the plurality of first exhaust holes 1111 are evenly distributed on the first perforated plate 111, and the threshold range of the ratio of the area of ​​the plurality of first exhaust holes 1111 to the total area of ​​the first perforated plate 111 is 20% to 40%. Thus, the structure in which the first perforated plate 111 is fully distributed with the first exhaust holes 1111 can further ensure the heat dissipation effect.

[0052] In one or more embodiments, a porous sound-absorbing material layer is provided in the first cavity 112. For example, the first cavity 112 is filled with linen felt, organic fiber material, inorganic fiber material, glass wool, rock wool, mineral wool, urea-formaldehyde foam plastic, urethane foam plastic, etc. In addition, a sound-absorbing baffle can also be provided in the first cavity 112. Thus, the noise reduction effect can be further improved by the sound-absorbing material and / or the sound-absorbing baffle.

[0053] In one or more embodiments, the oxygen concentrator heat dissipation and noise reduction device 11 further includes: a second perforated plate 113 and a second cavity portion 114. The second perforated plate 113 is located on the other side (lower side) of the first cavity portion 112 in the first direction, and the second perforated plate 113 is in a flat plate shape and is provided with a plurality of second exhaust holes 1131 penetrating the second perforated plate 113. The second cavity portion 114 is disposed on the other side (lower side) of the second perforated plate 113, wherein the gas in the first cavity portion 112 is discharged via the second perforated plate 113 and the second cavity portion 114.

[0054] For example, Figure 1 , Figure 2 and Figure 4As shown, the second perforated plate 113 is at the lower side of the first cavity portion 112, the second perforated plate 113 is in the shape of a flat plate, and the second perforated plate 113 is arranged with a plurality of second exhaust holes 1131 penetrating the second perforated plate 113, and the second cavity portion 114 is arranged at the lower side of the second perforated plate 113. The second perforated plate 113 and the second cavity portion 114 also use the same noise reduction principle as the first perforated plate 111 and the first cavity portion 112 to calculate the corresponding parameter range combination of aperture D, hole spacing B, plate thickness T, and air layer thickness L behind the plate. For example, the parameter ranges related to the second perforated plate are aperture D: 3mm-6mm, hole spacing B: 1-2mm, plate thickness T: 3mm-5mm, air layer thickness L behind the plate: 20mm-30mm, and perforation rate: 10%-20%).

[0055] In addition, the gas enters through the upper side of the first perforated plate 111, exits from the lower side, passes through the first cavity portion 112, enters the upper side of the second perforated plate 113, passes through the lower side thereof, and is finally discharged from the second cavity portion 114. Thus, a Helmholtz resonance structure is formed again by the second perforated plate 113 and the second cavity portion 114, and the first perforated plate 111 and the second perforated plate 113 form a series structure, selectively reducing the noise of two corresponding frequency bands. For example, the first perforated plate 111 and the first cavity portion 112 can correspondingly reduce the noise of the first frequency (for example, the main frequency of the noise generated by the compressor), and the second perforated plate 113 and the second cavity portion 114 can correspondingly reduce the noise of the second frequency (for example, the secondary frequency of the noise generated by the compressor), thereby further reducing the noise in the exhaust heat dissipation channel 12.

[0056] In one or more embodiments, the plurality of second exhaust holes 1131 are distributed in a portion of the second perforated plate 113 , and the second perforated plate 113 includes at least two exhaust hole areas A and B, and a predetermined distance M is provided between the at least two exhaust hole areas A and B.

[0057] Figure 5 1 is a schematic diagram of the second perforated plate 113 of the embodiment of the present application. Figure 4 and Figure 5 As shown, the plurality of second exhaust holes 1131 are distributed in a portion of the second perforated plate 113. Figure 5 As shown, the second perforated plate 113 is provided with at least two exhaust hole areas A and B. Thus, the second perforated plate 113 does not need to be fully covered with exhaust holes, and at least two exhaust hole areas can form more scattering and interference, which can help reduce the intensity of sound waves of specific frequencies.

[0058] In one or more embodiments, the perforation rate of the first perforated plate 111 is 2 or 3 times the perforation rate of the second perforated plate 113. Figure 4As shown, the area of ​​the first exhaust holes 1111 arranged in the first perforated plate 111 is 2 or 3 times the area of ​​the second exhaust holes 1131 arranged in the second perforated plate 113. Therefore, the second perforated plate 113 does not need to be fully covered with exhaust holes, and noise can be further reduced.

[0059] In one or more embodiments, a porous sound-absorbing material layer is provided in the second cavity 114. For example, the first cavity 112 is filled with linen felt, organic fiber material, inorganic fiber material, glass wool, rock wool, mineral wool, urea-formaldehyde foam plastic, urethane foam plastic, etc. In addition, a sound-absorbing baffle can also be provided in the second cavity 114. Thus, the noise reduction effect can be further improved by the sound-absorbing material and / or the sound-absorbing baffle.

[0060] The above schematically illustrates the first perforated plate and the second perforated plate, and the present application is not limited thereto. The hole positions and arrangement of at least two layers of perforated plates can affect the noise reduction effect, which is reflected in the propagation, reflection and interference of sound waves.

[0061] Take the influence of hole position as an example. For example, when the hole positions of two layers of boards are perfectly aligned, the propagation path of sound waves between the two layers of boards may be more direct, but it may also cause sound waves of certain specific frequencies to be enhanced in certain directions. When the hole positions are misaligned, the propagation path of sound waves will be more complicated, and more scattering and interference may occur, which helps to reduce the intensity of sound waves of specific frequencies.

[0062] For another example, the spacing between holes and the arrangement (regular or irregular) will affect the distribution and interaction of sound waves. Appropriate hole spacing and arrangement can cause more interference and scattering of sound waves between the double-layer plates, thereby reducing noise intensity.

[0063] Take the influence of the arrangement method as an example. For example, different arrangement methods (such as staggered, overlapping, parallel, etc.) will cause the propagation path and interaction mode of sound waves between the double-layer panels to be different, thus affecting the noise reduction effect.

[0064] For example, the arrangement is a square lattice arrangement, that is, the holes are arranged in a regular square array on the plate. This arrangement can provide a uniform noise reduction effect and is suitable for occasions where overall uniform noise reduction is required. Another example is a staggered arrangement or a honeycomb arrangement. This arrangement can break the regularity and reduce the occurrence of resonance, thereby improving the noise reduction effect. The staggered arrangement or honeycomb arrangement can also increase the sound absorption bandwidth of the perforated plate, so that it can maintain a good noise reduction effect at different frequencies.

[0065] For another example, there is a close relationship between the overall structure of a double-layer perforated plate (including the location and arrangement of holes) and the frequency of sound waves. For sound waves of different frequencies, a double-layer perforated plate may exhibit different noise reduction effects. Therefore, when designing a double-layer perforated plate, the frequency range of the target noise needs to be taken into account to optimize the noise reduction effect.

[0066] To determine the best hole locations and arrangements, detailed acoustic simulations and experimental testing can be performed. These tests can help determine which configurations are most effective for specific frequencies of sound waves and optimize the design of the double-layer perforated plate accordingly.

[0067] In the embodiment of the present application, the hole positions and arrangement of the first and second layers of the double-layer perforated plate have a significant impact on the noise reduction effect. By reasonably designing and optimizing these parameters, better noise reduction performance can be achieved. The above description is based on a double-layer structure as an example, but the present application is not limited thereto. For example, a multi-layer structure including more than two perforated plates may also be used.

[0068] In one or more embodiments, the oxygen generator heat dissipation and noise reduction device 11 also includes a channel 115, which is arranged on the other side (lower side) of the second perforated plate 113, at least partially overlapping with the second cavity portion 114, and the channel 115 includes a curved flow channel 1151, so that the gas in the second cavity portion 114 is refracted and discharged.

[0069] For example, Figure 1 and Figure 2 As shown, the channel 115 is arranged at the lower side of the second perforated plate 113, partially overlapping with the second cavity portion 114, and the channel 115 has a curved flow channel 1151, which can further discharge gas. Thus, the refraction through the curved flow channel 1151 can further enhance the noise reduction effect.

[0070] In one or more embodiments, the end of the channel 115 from which the gas is discharged ( Figure 1 and Figure 2 The other end ( Figure 1 and Figure 2 The left end shown in the figure is provided with a silencer elbow 116. Thus, the gas is reflected or refracted by the silencer elbow, further improving the noise reduction effect.

[0071] The embodiment of the present application further provides an oxygen concentrator 100, which includes at least a compressor 13 and the oxygen concentrator heat dissipation and noise reduction device 11 in the above embodiment.

[0072] Thus, a Helmholtz resonance structure is formed by the first perforated plate 111 and the first cavity portion 112 , so that the noise generated by the compressor 13 and other equipment in the exhaust heat dissipation channel 12 can be reduced, which can not only dissipate the exhaust heat but also reduce the noise.

[0073] The present application is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present application. Those skilled in the art can make various modifications and variations to the present application based on the spirit and principles of the present application, and these modifications and variations are also within the scope of the present application.

[0074] The preferred embodiments of the present application are described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and therefore the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and changes are easily conceivable to those skilled in the art, the embodiments of the present application are not intended to be limited to the precise structures and operations illustrated and described, but all suitable modifications and equivalents that fall within their scope may be covered.

Claims

1. An oxygen concentrator heat dissipation and noise reduction device, characterized in that: The oxygen concentrator heat dissipation and noise reduction device is arranged in the exhaust heat dissipation channel of the oxygen concentrator, and the oxygen concentrator heat dissipation and noise reduction device comprises: A first perforated plate, which is in a flat plate shape and has a plurality of first exhaust holes arranged therethrough, wherein gas from one side of the first perforated plate can be discharged to the other side of the first perforated plate through the plurality of first exhaust holes; and The first cavity portion is arranged on the other side of the first perforated plate, and the gas is discharged through the first cavity portion.

2. The oxygen concentrator heat dissipation and noise reduction device according to claim 1, characterized in that: The plurality of first exhaust holes are evenly distributed over the first perforated plate, and a ratio of an area occupied by the plurality of first exhaust holes to a total area of ​​the first perforated plate is greater than a preset threshold.

3. The heat dissipation and noise reduction device for an oxygen concentrator according to claim 1, characterized in that: A porous sound absorbing material layer and / or a sound absorbing baffle is arranged in the first cavity portion.

4. The oxygen concentrator heat dissipation and noise reduction device according to claim 1, characterized in that: The oxygen concentrator heat dissipation and noise reduction device also includes: A second perforated plate, which is located at the other side of the first cavity in the first direction, the second perforated plate is in a flat plate shape and has a plurality of second exhaust holes arranged through the second perforated plate; and The second cavity portion is arranged on the other side of the second perforated plate; wherein the gas in the first cavity portion is discharged through the second perforated plate and the second cavity portion.

5. The oxygen concentrator heat dissipation and noise reduction device according to claim 4, characterized in that: The plurality of second exhaust holes are distributed in a portion of the second perforated plate, and the second perforated plate includes at least two exhaust hole regions, and the at least two exhaust hole regions are spaced a predetermined distance apart.

6. The oxygen concentrator heat dissipation and noise reduction device according to claim 4, characterized in that: The perforation rate of the first perforated plate is 2 or 3 times the perforation rate of the second perforated plate.

7. The heat dissipation and noise reduction device for an oxygen concentrator according to claim 4, characterized in that: A porous sound absorbing material layer and / or a sound absorbing baffle is arranged in the second cavity portion.

8. The heat dissipation and noise reduction device for an oxygen concentrator according to claim 4, characterized in that: The oxygen concentrator heat dissipation and noise reduction device also includes: A channel is arranged on the other side of the second perforated plate and at least partially overlaps with the second cavity portion, and the channel includes a bent flow channel so that the gas in the second cavity portion is refracted and then discharged.

9. The oxygen concentrator heat dissipation and noise reduction device according to claim 8, characterized in that: A silencer elbow is provided at the other end of the passage opposite to the end where the gas is discharged.

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