Noise reduction box and ventilation therapy device

Abstract

The utility model relates to ventilation therapy field discloses a kind of noise reduction box and ventilation therapy equipment.Noise reduction box includes the box body with installation cavity being limited inside, box body is provided with the noise reduction box air inlet and the noise reduction box air outlet being communicated with installation cavity, when fan for pressurizing airflow is installed in installation cavity, noise reduction box air inlet is communicated with fan air inlet of fan, noise reduction box air outlet is communicated with fan air outlet of fan, it is characterized in that, communication path between noise reduction box air inlet and fan air inlet is provided with cyclone device, cyclone device is set as can rotate under the drive of inlet airflow to supply airflow to pass through.The utility model's noise reduction box is set cyclone device on the communication path between noise reduction box air inlet and fan air inlet by above-mentioned technical scheme, cyclone device does not affect airflow to pass through when working, simultaneously, noise generated by fan in noise reduction box is not easy to transmit, to play the role of noise reduction.

Description

Technical Field

[0001] This utility model relates to the field of ventilation therapy equipment, specifically to a noise reduction box and a ventilation therapy device including the noise reduction box. Background Technology

[0002] Currently available ventilation therapy equipment, such as ventilators and high-flow oxygen therapy devices, mostly rely on sound-absorbing cotton in the noise reduction box housing the fan to achieve a noise level not exceeding 30 dB. However, due to the inherent characteristics of the material, sound-absorbing cotton can easily generate fine particulate matter after long-term operation or frequent ozone sterilization. If these particles are inhaled by patients, they can pose health risks. Therefore, a ventilation therapy device with a noise reduction box without sound-absorbing cotton would undoubtedly be a safer choice for patients. Utility Model Content

[0003] The purpose of this invention is to provide a noise reduction box without sound-absorbing cotton and a ventilation therapy device having the noise reduction box.

[0004] To achieve the above objectives, this utility model provides a noise reduction box, which includes a box body with an internally defined mounting cavity. The box body is provided with a noise reduction box air inlet and a noise reduction box air outlet communicating with the mounting cavity. When a fan for pressurizing airflow is installed in the mounting cavity, the noise reduction box air inlet is connected to the fan air inlet of the fan, and the noise reduction box air outlet is connected to the fan air outlet of the fan. A swirling device is provided on the communication path between the noise reduction box air inlet and the fan air inlet. The swirling device is configured to rotate under the drive of the intake airflow to allow airflow to pass through.

[0005] In some embodiments, the swirling device includes a rotating part and at least one fan blade, the rotating part being rotatably disposed on the connecting path, and the fan blade being disposed on the outer peripheral wall of the rotating part.

[0006] In some embodiments, the swirling device is made of plastic, preferably polyoxymethylene.

[0007] In some embodiments, the fan blades are arranged to extend along the axial direction of the rotating part.

[0008] In some embodiments, the vortex device includes a plurality of fan blades, which are spaced apart circumferentially along the rotating portion.

[0009] In some embodiments, at least two air intake chambers are provided on the communication path between the noise reduction box air inlet and the fan air inlet, and the at least two air intake chambers are connected by a communication port, with the swirling device disposed at the communication port.

[0010] In some embodiments, a guide surface is provided on the connecting path located downstream of the swirl device, the guide surface being configured to cooperate with the swirl device to guide the airflow downstream.

[0011] In some embodiments, a partition assembly is provided within the mounting cavity, dividing the mounting cavity into a first chamber, a second chamber, and a third chamber arranged sequentially from bottom to top. The partition assembly also divides the second chamber into a first sub-chamber and a second sub-chamber. The air inlet of the noise reduction box communicates with the first sub-chamber. The partition assembly is provided with a first communication port connecting the first sub-chamber to the first chamber, a second communication port connecting the first chamber to the third chamber, a third communication port connecting the third chamber to the second sub-chamber, and a fourth communication port connecting the second sub-chamber to the third chamber. The fan is installed in the third chamber, with its air inlet correspondingly connected to the fourth communication port. The vortex device is installed at the first communication port.

[0012] In some embodiments, a guide surface is provided in the first chamber, which is configured to cooperate with the swirling device to guide the airflow toward the second communication port.

[0013] In some embodiments, the second connecting port and the air inlet of the noise reduction box are located on one side of the noise reduction box in the left-right direction, the first connecting port and the third connecting port are located on the other side of the noise reduction box in the left-right direction, and the fourth connecting port is located in the middle of the noise reduction box in the left-right direction.

[0014] In some embodiments, a channel is provided between the fan and the peripheral wall of the third chamber for gas from the second connection port to flow around the fan to the third connection port.

[0015] In some embodiments, the second communication port and the noise reduction box air inlet are staggered in the front-rear direction of the noise reduction box.

[0016] In some embodiments, the noise reduction box air inlet is located in front of the second communication port.

[0017] In some embodiments, the first connection port and the third connection port are staggered in the front-back direction of the noise reduction box.

[0018] In some implementations, the first connection port is located in front of the third connection port.

[0019] In some embodiments, the partition assembly includes a first partition, a second partition, and a third partition disposed between the first partition and the second partition, which are horizontally spaced vertically. The first chamber is defined by the second partition and the bottom of the box in the height direction of the box body. The second chamber is defined by the first partition and the second partition in the height direction of the box body. The third chamber is defined by the first partition and the top of the box body in the height direction of the box body. The first sub-chamber and the second sub-chamber are separated by the third partition to form the second chamber.

[0020] In some embodiments, the second partition is at least partially made of a flexible material.

[0021] In some embodiments, the portion of the second partition for defining the second sub-chamber has a microporous plate portion, and the partition assembly further includes a fourth partition disposed within the first chamber, the fourth partition separating a damping area in the first chamber corresponding to the microporous plate portion, the microporous plate portion being disposed on top of the damping area such that a back cavity is formed between the microporous plate portion and the damping area, the back cavity being in corresponding communication with the micropores on the microporous plate portion.

[0022] In some embodiments, a honeycomb structure is provided within the damping area.

[0023] In some embodiments, the microporous plate portion is recessed on the second partition.

[0024] In some embodiments, the microperforated plate portion corresponds to the position of the fan air inlet.

[0025] In some embodiments, the micropore diameter of the microporous plate portion is 0.1~5mm, preferably 1~2mm, the opening rate is 0.1%~20%, preferably 4%, and the micropore spacing is 1~20 times the micropore diameter, preferably 5~8 times.

[0026] In some embodiments, the first chamber is provided with a flow guiding component that guides the airflow to flow in a curved path from the first connection port to the second connection port.

[0027] In some embodiments, the partition assembly further includes a fifth partition disposed within the third chamber, the fifth partition separating an air outlet chamber within the third chamber, and both the fan outlet and the noise reduction box outlet are connected to the air outlet chamber.

[0028] In some embodiments, the third chamber is provided with a honeycomb structure.

[0029] In some embodiments, an air outlet pipe is connected between the air outlet of the fan and the air outlet of the noise reduction box, and the air outlet pipe passes through the air outlet chamber.

[0030] Another aspect of this invention provides a ventilation therapy device, including the noise reduction box described above.

[0031] The noise reduction box of this utility model, through the above-mentioned technical solution, sets a swirling device on the connecting path between the air inlet of the noise reduction box and the air inlet of the fan. When the incoming airflow enters, it can drive the swirling device to rotate and then enter the subsequent chamber or air path. At the same time, during the reverse propagation of noise, since the sound wave energy will not cause the swirling device to rotate in the opposite direction, the swirling device can block the sound wave, making it difficult for the sound wave to propagate in the opposite direction out of the noise reduction box, thereby playing a noise reduction role.

[0032] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0033] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments and descriptions of the utility model are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings: Figure 1 This is a perspective view of the swirl device in this utility model; Figure 2 This is a front view of the cyclone device in this utility model; Figure 3 This is a side view of the vortex device in this utility model; Figure 4 This is an exploded view of one embodiment of the noise reduction box in this utility model; Figure 5 yes Figure 4 A longitudinal sectional view of the noise reduction box through the air inlet of the noise reduction box; Figure 6 yes Figure 4 A cross-sectional view of the noise reduction box through the microporous plate section; Figure 7 yes Figure 4 Longitudinal cross-sectional view of the noise reduction box through the guide pipe; Figure 8 yes Figure 4 A cross-sectional view of the noise reduction box passing through the air outlet of the fan; Figure 9 yes Figure 4 A bottom-view perspective view of the upper middle box; Figure 10 yes Figure 4 A top-view perspective view of the first partition, in which a flow guide pipe is installed; Figure 11 yes Figure 10 A three-dimensional view viewed from below; Figure 12 yes Figure 4 Top view of the second partition in the middle; Figure 13 yes Figure 4 Top-view perspective of the second partition; Figure 14 yes Figure 4 A bottom-view perspective of the second partition in the middle; Figure 15 yes Figure 4 Top-view perspective of the lower middle box; Figure 16 This is an exploded view of another embodiment of the noise reduction box in this utility model; Figure 17 yes Figure 16 A longitudinal sectional view of the noise reduction box through the air inlet of the noise reduction box; Figure 18 yes Figure 16 A longitudinal sectional view of the noise reduction box through the first connecting port; Figure 19 This is an exploded view of another embodiment of the noise reduction box in this utility model; Figure 20 This is a top perspective view of another embodiment of the lower box body of this utility model; Figure 21 This is a top perspective view of another embodiment of the lower box body of this utility model; Figure 22 yes Figure 19 Top view of the lower middle box; Figure 23 yes Figure 19 Top-view perspective of the second partition; Figure 24 yes Figure 19 The diagram shows a cross-sectional view of the air outlet of the noise reduction box.

[0034] Explanation of reference numerals in the attached figures 20-Noise Reduction Box, 21-Box Body, 211-Noise Reduction Box Air Inlet, 212-Noise Reduction Box Air Outlet, 213-Upper Box Body, 214-Lower Box Body, 215-Mounting Slot, 22-Fan, 221-Fan Air Inlet, 222-Fan Air Outlet, 223-Flexible Silicone Sleeve, 23-Separation Component, 231-First Connecting Port, 232-Second Connecting Port, 233-Third Connecting Port, 234-Fourth Connecting Port, 235-First Partition, 236- Second partition, 2361-microporous plate section, 237-third partition, 238-fourth partition, 239-fifth partition, 2391-opening, 24-first chamber, 241-back cavity, 242-shock absorption area, 243-honeycomb structure, 25-second chamber, 251-first sub-chamber, 252-second sub-chamber, 26-third chamber, 261-air outlet chamber, 262-air outlet pipe, 27-guide pipe, 28-filter cover, 29-guide rib; 30 - Swirl device; 31 - Rotating part; 32 - Fan blade; 40 - Flow guide, 41 - Flow guide surface. Detailed Implementation

[0035] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this utility model by way of example, but should not be used to limit the scope of this utility model. This utility model can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0036] These embodiments are provided to make the present invention thorough and complete, and to fully express the scope of the present invention to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions and values ​​set forth in these embodiments should be interpreted as merely exemplary and not as limiting.

[0037] It should be noted that, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0038] Furthermore, the terms "first," "second," and similar words used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0039] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0040] All terms used in this invention have the same meaning as understood by one of ordinary skill in the art to which this invention pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0041] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0042] This utility model provides a noise reduction box, see [link]. Figure 4 , 1619. The noise reduction box 20 includes a box body 21 that internally defines an installation cavity. The box body 21 is provided with a noise reduction box air inlet 211 and a noise reduction box air outlet 212 that communicate with the installation cavity. When the fan 22 used to pressurize the airflow is installed in the installation cavity, the noise reduction box air inlet 211 communicates with the fan air inlet 221 of the fan 22, and the noise reduction box air outlet 212 communicates with the fan air outlet 222 of the fan 22. In this utility model, the noise reduction box 20 may also include a swirling device 30. The swirling device 30 is disposed on the communication path between the noise reduction box air inlet 211 and the fan air inlet 221. The swirling device 30 is configured to rotate under the drive of the intake airflow to allow the airflow to pass through. In other words, in the absence of an intake airflow (i.e., the airflow flowing towards the fan intake 221 from the noise reduction box intake 211), the swirling device 30 blocks (physically blocks) the connection path. In the presence of an intake airflow, the intake airflow can drive the swirling device 30 to rotate to create a channel that allows the intake airflow to pass through.

[0043] The noise reduction box of this invention, through the above-described technical solution, features a swirling device 30 along the connecting path between the noise reduction box's air inlet 211 and the fan's air inlet 221. When the incoming airflow enters, it drives the swirling device 30 to rotate, thus entering the subsequent chamber or air passage. Simultaneously, during the reverse propagation of noise, the sound wave energy prevents the swirling device 30 from rotating in the opposite direction. Therefore, the swirling device 30 blocks the sound waves, making it difficult for them to propagate backward out of the noise reduction box, thereby achieving noise reduction. Compared to a noise reduction box without the swirling device 30, the noise reduction box of this invention with the swirling device 30 can reduce noise by approximately 15% to 20%.

[0044] In some implementations, such as Figures 1 to 3 As shown, the vortex device 30 includes a rotating part 31 and at least one fan blade 32. The rotating part 31 is rotatably disposed on the communication path, and the fan blade 32 is disposed on the outer peripheral wall of the rotating part 31. In this embodiment, the vortex device 30 can achieve the function of a sound barrier without affecting the original ventilation volume by rotating itself. It should be noted that the more fan blades 32 there are, the better the sound barrier effect. In addition, the rotation of the vortex device 30 can also segment the airflow (i.e., modify the airflow that originally caused the sound in the cavity of the noise reduction box), change the original frequency, and thus improve the comfort of using the ventilation therapy equipment.

[0045] The noise reduction box may be provided with two mounting slots 215 for rotatably mounting the two ends of the rotating part 31. For example Figure 17 In the embodiment shown, the mounting groove 215 is a recess formed on the lower housing 214.

[0046] The swirl device 30 is preferably made of plastic, such as polyoxymethylene. This gives the swirl device 30 a self-lubricating characteristic, and when the swirl device 30 rotates, the friction at the rotating part 31 is small, thereby reducing the power consumption of the fan.

[0047] In the above embodiments, the fan blades 32 can have any suitable shape and arrangement. For example... Figures 1-3 In the embodiment shown, the fan blades 32 can be extended along the axial direction of the rotating part 31. When the vortex device 30 includes a plurality of fan blades 32, the plurality of fan blades 32 are arranged at circumferential intervals along the rotating part 31.

[0048] In this utility model, such as Figure 18 As shown, a guide surface 41 may also be provided on the connecting path downstream of the swirl device 30. The guide surface 41 is configured to cooperate with the swirl device 30 to guide the airflow downstream. The guide surface 41 may be a curved surface.

[0049] In this invention, the swirl device 30 can be set in... Figure 4 or Figure 16 or Figure 19 The noise reduction box 20 shown is located on the communication path between the noise reduction box inlet 211 and the fan inlet 221, specifically at the communication port connecting two adjacent air inlet chambers on the communication path. For example... Figure 16 A detailed diagram shows the swirling device 30 installed inside the noise reduction box 20. Figure 4 and Figure 19 The swirl device 30 is not shown in the diagram. When the swirl device 30 is applied in... Figure 4 and Figure 19 When the noise reduction box is inside 20, its specific installation location and form are the same as Figure 16 The results are consistent with those shown.

[0050] In this utility model, see Figures 4 to 15The installation cavity may be equipped with a partition component 23, which may be configured to divide the installation cavity into a first chamber 24, a second chamber 25, and a third chamber 26 arranged sequentially from bottom to top. The partition component 23 may also be configured to divide the second chamber 25 into a first sub-chamber 251 and a second sub-chamber 252, wherein the first sub-chamber 251 is located above the second sub-chamber 252, and the noise reduction box air inlet 211 is connected to the first sub-chamber 251. The partition component 23 is provided with a first connecting port 231 connecting the first sub-chamber 251 and the first chamber 24, a second connecting port 232 connecting the first chamber 24 and the third chamber 26, a third connecting port 233 connecting the third chamber 26 and the second sub-chamber 252, and a fourth connecting port 234 connecting the second sub-chamber 252 and the third chamber 26. The fan 22 is installed in the third chamber 26 and the fan air inlet 221 is connected to the fourth connecting port 234. The airflow path is as follows: noise reduction box inlet 211 → first sub-chamber 251 → first connecting port 231 → first chamber 24 → second connecting port 232 → third chamber 26 → third connecting port 233 → second sub-chamber 252 → fan inlet 221 → fan outlet 222 → noise reduction box outlet 212. This invention, through the arrangement of multiple chambers, extends the airflow path and causes multiple airflow turns. Therefore, even without noise-reducing cotton inside the noise reduction box, the long-path spatial design of the multiple chambers achieves a good noise reduction effect for the fan.

[0051] In this invention, the second connecting port 232 and the noise reduction box air inlet 211 can be located on one side of the noise reduction box 20 in the left-right direction, the first connecting port 231 and the third connecting port 233 can be located on the other side of the noise reduction box 20 in the left-right direction, and the fourth connecting port 234 is located in the middle of the noise reduction box 20 in the left-right direction. This arrangement ensures that the adjacent connecting ports through which the airflow passes during the flow between the first chamber 24, the second chamber 25, and the third chamber 26 are located on different sides in the left-right direction. For example, the first connecting port 231 and the second connecting port 232 are located on different sides, and the second connecting port 232 and the third connecting port 233 are located on different sides. This arrangement can further extend the airflow path and reduce noise.

[0052] Furthermore, the second connecting port 232 and the noise reduction box air inlet 211 can be staggered in the front-rear direction of the noise reduction box 20. Preferably, the noise reduction box air inlet 211 is located in front of the second connecting port 232. The first connecting port 231 and the third connecting port 233 can be staggered in the front-rear direction of the noise reduction box 20. Preferably, the first connecting port 231 is located in front of the third connecting port 233. This arrangement allows the connecting ports on the same side of the noise reduction box 20 in the left-right direction to be located at different positions in the front-back direction of the noise reduction box 20. For example, the second connecting port 232 and the noise reduction box air inlet 211 on the same side of the noise reduction box 20 in the left-right direction are staggered in the front-back direction of the noise reduction box 20, and the first connecting port 231 and the third connecting port 233 on the same side of the noise reduction box 20 in the left-right direction are staggered in the front-back direction of the noise reduction box 20. This arrangement can further extend the airflow path and reduce noise on the one hand, and reduce the space required for the noise reduction box 20 on the other hand, achieving a better noise reduction effect within the limited space of the noise reduction box 20.

[0053] Specifically, the second connecting port 232 and the noise reduction box inlet 211 are located on the right side of the noise reduction box 20, with the noise reduction box inlet 211 located in front of the second connecting port 232; the first connecting port 231 and the third connecting port 233 are located on the left side of the noise reduction box 20, with the first connecting port 231 located in front of the third connecting port 233; the fourth connecting port 234 (see the location of the fan 22, the fourth connecting port 234 is at the bottom of the fan 22) is located in the middle of the left-right direction of the noise reduction box 20. This arrangement can maximize the extension of the airflow path and effectively reduce noise.

[0054] In this invention, a channel can be provided between the fan 22 and the peripheral wall of the third chamber 26 for gas from the second connection port 232 to flow around the fan 22 to the third connection port 233. With this arrangement, since the third connection port 233 is located on the opposite side in the left-right direction from the second connection port 232, the airflow entering the third chamber 26 from the second connection port 232 can circulate around the fan 22 (see...). Figure 7 After flowing through the channel, the airflow then flows away through the third connecting port 233. Since the fan 22 is located in the third chamber 26, the above airflow process can reduce noise and also remove the heat generated by the fan motor, thus cooling the fan.

[0055] In some embodiments of this invention, at least two air intake chambers are provided along the communication path between the noise reduction box air inlet 211 and the fan air inlet 221. These at least two air intake chambers are connected by a communication port, and the swirling device 30 is disposed at this communication port. The at least two air intake chambers can be arranged in any direction. For example… Figure 18In the embodiment shown, at least two air intake chambers include a first sub-chamber 251 and a first chamber 24 arranged vertically, and a swirling device 30 is disposed at a first communication port 231 connecting the first sub-chamber 251 and the first chamber 24.

[0056] For example Figure 16 and Figure 18 As shown, the swirling device 30 is located at the first connecting port 231 connecting the first sub-chamber 251 and the first chamber 24. A guide member 40 is disposed within the first chamber 24. The guide member 40 has an arc-shaped guide surface 41, which corresponds to the swirling device 30 and has an extension length approximately equal to that of the fan blade 32. A gap exists between the guide surface 41 and the fan blade 32 to allow the fan blade 32 to rotate. The guide surface 41 cooperates with the swirling device 30 to guide the airflow to the right side of the first chamber 24. As previously described, Figure 4 and Figure 19 The noise reduction box 20 shown does not have a vortex device 30 installed inside. If it were installed, the location of the vortex device 30 would be different from that of the noise reduction box 20 shown. Figure 16 The noise reduction box 20 shown is consistent, that is: if in Figure 4 and Figure 19 In this embodiment, a swirling device 30 is provided inside the noise reduction box 20. The swirling device 30 is also located at the first communication port 231 connecting the first sub-chamber 251 and the first chamber 24. A guide member 40 is provided inside the first chamber 24. The guide member 40 has an arc-shaped guide surface 41, which is corresponding to the swirling device 30 and has an extension length approximately equal to that of the fan blade 32. There is a gap between the guide surface 41 and the fan blade 32 to allow the fan blade 32 to rotate. The guide surface 41 cooperates with the swirling device 30 to guide the airflow to the right side of the first chamber 24.

[0057] In this utility model, see Figure 4 The noise reduction box 20 may further include a guide tube 27, which is detachably inserted into the second connecting port 232 to connect the first chamber 24 and the third chamber 26. In other embodiments of the present invention, the guide tube 27 may also be fixedly connected or integrally formed at the second connecting port 232. Preferably, the noise reduction box 20 includes multiple guide tubes 27. Preferably, multiple guide tubes 27 are arranged side by side at the second connecting port 232. By using the guide tubes 27 to guide the airflow in the first chamber 24 to the third chamber 26, the airflow path can be extended and the airflow can be streamlined due to the length of the guide tubes. In particular, the arrangement of multiple guide tubes 27 makes the airflow streamlining effect more obvious, thereby achieving a better noise reduction purpose.

[0058] In this invention, the partition component 23 can be implemented in various ways, as long as it can separate the aforementioned chamber within the mounting cavity of the noise reduction box.

[0059] Specifically, according to one embodiment of the present invention, the partition component 23 includes a first partition 235, a second partition 236 horizontally spaced vertically, and a third partition 237 disposed between the first partition 235 and the second partition 236. A first chamber 24 is defined in the height direction of the box body 21 by the second partition 236 and the bottom of the box body 21. A second chamber 25 is defined in the height direction of the box body 21 by the first partition 235 and the second partition 236. A third chamber 26 is defined in the height direction of the box body 21 by the first partition 235 and the top of the box body 21. A first sub-chamber 251 and a second sub-chamber 252 are separated by the third partition 237. A first connecting opening 231 may be formed on the second partition 236. The second connecting port 232 can be formed on the first partition 235 and the second partition 236. The guide pipe 27 passes through the two second connecting ports 232 on the first partition 235 and the second partition 236, thereby connecting the first chamber 24 and the third chamber 26. The third connecting port 233 and the fourth connecting port 234 can be formed on the first partition 235.

[0060] Preferably, the second partition 236 is made of a flexible material, or the second partition 236 as a whole is made of a flexible material. The flexible material can consume the vibration when the airflow passes through, thereby further consuming energy. The energy consumed is equal to the noise reduction.

[0061] In this invention, the portion of the second partition 236 that defines the second sub-chamber 252 may have a perforated plate portion 2361. The partition assembly 23 may also include a fourth partition 238 disposed within the first chamber 24. The fourth partition 238, corresponding to the perforated plate portion 2361, separates a damping region 242 within the first chamber 24. The perforated plate portion 2361 is disposed at the top of the damping region 242, forming a back cavity 241 between the perforated plate portion 2361 and the damping region 242. The back cavity 241 is connected to the micropores on the perforated plate portion 2361. In other words, the perforated plate portion 2361 is located opposite the fan inlet 221, which can effectively absorb noise from the fan inlet and reduce turbulence directly entering the fan inlet 221, thus achieving better noise reduction.

[0062] The microperforated plate portion 2361 can be flush with the rest of the second partition 236, or it can be recessed into the second partition 236. By recessing the microperforated plate portion 2361 into the second partition 236, more airflow can enter the area, thereby improving the noise reduction effect.

[0063] The microporous plate portion 2361 of the second partition 236 can be made of a flexible material, such as silicone, to achieve a better shock absorption effect.

[0064] During use, a portion of the airflow entering the microporous plate section 2361 enters the back cavity 241 through the micropores. Since the back cavity 241 is a resonant cavity structure that is only connected to the second sub-cavity 252 through the micropores, the airflow enters the back cavity 241 and contacts and collides with each wall of the back cavity 241, thereby consuming energy. At the same time, the airflow will also cause the microporous plate section 2361 to vibrate, thereby further consuming energy. The energy consumed is equal to the noise reduction.

[0065] Among them, as a preferred option, such as Figures 19-22 As shown, a honeycomb structure 243 for optimizing noise reduction is provided within the damping area 242. For example, the honeycomb structure 243 is provided on the bottom wall and / or side wall of the damping area 242. Specifically, the honeycomb structure 243 includes at least one honeycomb unit, each honeycomb unit being a structure with a certain height and a predetermined cross-sectional pattern, wherein the cross-sectional pattern can be hexagonal, circular, rectangular, rhomboid, etc., preferably hexagonal, and the honeycomb unit is preferably made of a rigid material. In this invention, the honeycomb structure 243 is located below the microporous plate portion 2361, which is correspondingly positioned directly below the fan inlet 221. Positioning the honeycomb structure 243 near the fan intake area, where the airflow is most turbulent and the specific frequency noise generated by the fan is most pronounced, guides sound waves into the back cavity 241 formed by the damping area 242 and the microporous plate portion 2361. When the sound waves enter the honeycomb cells, the sound energy is converted into heat energy due to friction and viscosity (viscous dissipation) of the cell walls. The regular channel structure of the honeycomb optimizes acoustic impedance matching, reduces sound wave reflection, and enhances energy absorption. Furthermore, when the incident sound wave frequency matches the resonant frequency of the back cavity 241, the air vibrates violently at the honeycomb cells, dissipating a large amount of sound energy through viscous friction. A honeycomb array with a certain number of honeycomb cells can cover a wide range of resonant frequencies. In addition, the periodic array structure (hexagonal arrangement) of the honeycomb scatters sound waves. The scattered sound waves interfere with the original sound waves, and some frequency sound waves are canceled out due to destructive interference, which is particularly effective for mid-to-high frequency noise.

[0066] Preferably, the partition component 23 can also partition other resonant cavity regions within the first chamber 24 to eliminate or reduce noise at specific frequencies using acoustic resonance. Preferably, a honeycomb structure 243 is provided within the resonant cavity region. The honeycomb structure 243 can significantly enhance the sound wave dissipation effect and broaden the effective noise reduction bandwidth.

[0067] Preferably, the micro-perforated plate portion 2361 corresponds to the position of the fan inlet 221. For example... Figure 23The micropore diameter of the microporous plate portion 2361 shown is preferably 0.1~5mm, more preferably 1~2mm, the open area ratio is preferably 0.1%~20%, more preferably 4%, and the micropore spacing is preferably 1~20 times the micropore diameter, more preferably 5~8 times.

[0068] In this invention, to further improve the noise reduction effect, a flow guiding component can be provided in the first chamber 24 to guide the airflow in a curved direction from the first connecting port 231 to the second connecting port 232. Specifically, as shown... Figure 20 As shown, the flow guiding assembly may include a plurality of flow guiding ribs 29 disposed within the first chamber 24.

[0069] Of course, in other chambers, guide ribs 29 can also be installed to guide the airflow.

[0070] In this utility model, see Figure 9 The partition assembly 23 may further include a fifth partition 239 disposed within the third chamber 26. The fifth partition 239 divides the third chamber 26 into an air outlet chamber 261, and both the fan outlet 222 and the noise reduction box outlet 212 are connected to the air outlet chamber 261. See also Figure 18 The fan outlet 222 can be connected to the side of the air outlet chamber 261. Specifically, the fifth partition 239 is provided with an opening 2391. The fan outlet 222 passes through the opening 2391 and discharges the airflow discharged by the fan 22 after pressurization into the air outlet chamber 261. The noise reduction box outlet 212 can be connected to the top of the air outlet chamber 261. In this way, the airflow discharged by the fan 22 can be turned in the air outlet chamber 261 and discharged through the noise reduction box outlet 212. The airflow is consumed by collision during this process, further reducing noise.

[0071] Among them, as a preferred option, such as Figure 19 and Figure 24An air outlet pipe 262 can be connected between the fan outlet 222 and the noise reduction box outlet 212, and the outlet end of the air outlet pipe 262 extends through the noise reduction box outlet 212 to the outside of the noise reduction box 20. In one embodiment of this utility model, the air outlet pipe 262 passes through the air outlet cavity 261 and extends to the outside of the air outlet cavity 261 (i.e., outside the noise reduction box). In other embodiments of this utility model, the fan outlet 222 can also directly communicate with the outside of the noise reduction box 20 through the air outlet pipe 262 for air outlet without setting an air outlet cavity. Preferably, in order to make the air outlet pipe have a flexible conforming characteristic to adapt to different spaces and also have a certain vibration reduction and noise reduction effect, the air outlet pipe 262 is made of a flexible material. In this invention, the fan 22 is connected to the noise reduction box 20 via a detachable flexible silicone sleeve 223. By placing the flexible silicone sleeve 223 on the outside of the fan 22 and connecting it to the noise reduction box 20, the vibration generated by the fan 22 during operation can be effectively reduced, thus achieving a noise reduction effect. In this invention, the air outlet pipe 262 and the flexible silicone sleeve 223 are integrally formed or separately configured and detachably connected to the air outlet 222 of the fan.

[0072] Refer to in sequence Figures 5-8 As indicated by the black arrow, during air intake, the airflow enters horizontally from right to left into the first sub-chamber 251 of the second chamber 25 via the noise reduction box air inlet 211 located on the right side wall of the noise reduction box 20, and flows horizontally to the left along the first sub-chamber 251. Then, it enters downward into the first chamber 24 via the first connecting port 231 located on the left side of the noise reduction box 20, and flows along the first chamber 24 in a curved direction to the right rear under the guidance of the guide rib 29. Finally, it enters the guide pipe 27 and flows along the guide pipe 27. The air flows upward into the third chamber 26, then around the fan 22 to the left to the third connecting port 233, and then into the second sub-chamber 252. After passing through the combination of the microporous plate section 2361 and the back cavity 241 for noise reduction, it flows upward through the fan inlet 221 exposed by the fourth connecting port 234 and enters the fan 22. After being pressurized by the fan 22, it enters the outlet chamber 261 from the fan outlet 222 and finally flows out from the noise reduction box outlet 212.

[0073] In this invention, the box body 21 may include an upper box body 213 and a lower box body 214, and the mounting cavity is defined by the upper box body 213 and the lower box body 214 together. The third chamber 26 may be defined by a first partition 235 and the upper box body 213. The first partition 235 may be detachably disposed at the top opening of the lower box body 214; for example, an annular boss may be provided at the top of the lower box body 214 to support the periphery of the first partition 235. The second partition 236 may be supported inside the lower box body 214. The first chamber 24 may be defined by the second partition 236 and the lower box body 214, and the second chamber 25 may be defined by the first partition 235 and the second partition 236. In this invention, as... Figure 9 As shown, at least a portion of the space in the third chamber 26 is provided with a honeycomb structure 243. For example, a honeycomb structure 243 is provided on the top wall of the chamber space that communicates with the second connecting port 232 and the third connecting port 233 in the corresponding third chamber 26. That is, the honeycomb structure 243 is provided on the inner wall of the upper box 213. The hexagonal structure of the honeycomb structure 243 enhances the rigidity of the upper box 213, which has a certain effect of reducing vibration or deformation and further reducing noise.

[0074] This utility model also provides a ventilation therapy device, including a noise reduction box 20.

[0075] The ventilation therapy device of this invention, through the use of a multi-chamber structure and a noise reduction box 20 without sound-absorbing cotton with a reasonable airflow path, can completely eliminate the hidden danger of decomposing fine particulate matter, while also improving the cavity noise problem and enhancing the comfort of use.

[0076] The ventilation therapy device may also include a main unit, a patient interface, etc., and the noise reduction box 20 may be set inside the main unit.

[0077] The ventilation therapy equipment may be a ventilator, a high-flow oxygen therapy device, etc.

[0078] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0079] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the different embodiments can be combined in any way.

Claims

1. A noise reduction box (20) comprising a box body (21) internally defining an installation cavity, wherein the box body (21) is provided with a noise reduction box air inlet (211) and a noise reduction box air outlet (212) communicating with the installation cavity, wherein when a fan (22) for pressurizing airflow is installed in the installation cavity, the noise reduction box air inlet (211) is connected to the fan air inlet (221) of the fan (22), and the noise reduction box air outlet (212) is connected to the fan air outlet (222) of the fan (22), characterized in that, A swirling device (30) is provided on the communication path between the noise reduction box air inlet (211) and the fan air inlet (221). The swirling device (30) is configured to rotate under the drive of the intake airflow to allow the airflow to pass through.

2. The noise reduction box according to claim 1, characterized in that, The swirling device (30) includes a rotating part (31) and at least one fan blade (32), the rotating part (31) being rotatably disposed on the communicating path, and the fan blade (32) being disposed on the outer peripheral wall of the rotating part (31); and / or The swirling device (30) is made of plastic.

3. The noise reduction box according to claim 2, characterized in that, The plastic material is polyoxymethylene.

4. The noise reduction box according to claim 2, characterized in that, The fan blades (32) are arranged to extend axially along the rotating part (31); and / or The swirling device (30) includes a plurality of fan blades (32) which are spaced apart circumferentially along the rotating part (31).

5. The noise reduction box according to any one of claims 1-4, characterized in that, At least two air intake chambers are provided on the communication path between the noise reduction box air inlet (211) and the fan air inlet (221), and the at least two air intake chambers are connected by a communication port. The swirling device (30) is provided at the communication port; and / or A guide surface (41) is provided on the connecting path located downstream of the swirling device (30). The guide surface (41) is configured to cooperate with the swirling device (30) to guide the airflow downstream.

6. The noise reduction box according to claim 1, characterized in that, The mounting cavity is provided with a partition assembly (23), which divides the mounting cavity into a first chamber (24), a second chamber (25), and a third chamber (26) arranged sequentially from bottom to top. The partition assembly (23) also divides the second chamber (25) into a first sub-chamber (251) and a second sub-chamber (252). The noise reduction box air inlet (211) communicates with the first sub-chamber (251). The partition assembly (23) is provided with a first communication port connecting the first sub-chamber (251) and the first chamber (24). 231), a second connecting port (232) connecting the first chamber (24) and the third chamber (26), a third connecting port (233) connecting the third chamber (26) and the second sub-chamber (252), and a fourth connecting port (234) connecting the second sub-chamber (252) and the third chamber (26), the fan (22) is installed in the third chamber (26) and the fan inlet (221) is connected to the fourth connecting port (234), and the vortex device (30) is installed at the first connecting port (231).

7. The noise reduction box according to claim 6, characterized in that, The first chamber (24) is provided with a flow guide surface (41), which is configured to cooperate with the swirling device (30) to guide the airflow toward the second communication port (232).

8. The noise reduction box according to claim 6, characterized in that, The second connecting port (232) and the noise reduction box air inlet (211) are located on one side of the noise reduction box (20) in the left-right direction, the first connecting port (231) and the third connecting port (233) are located on the other side of the noise reduction box (20) in the left-right direction, and the fourth connecting port (234) is located in the middle of the noise reduction box (20) in the left-right direction.

9. The noise reduction box according to claim 8, characterized in that, The fan (22) and the peripheral wall of the third chamber (26) have a channel for gas from the second connection port (232) to flow around the fan (22) to the third connection port (233).

10. The noise reduction box according to claim 8, characterized in that, The second connecting port (232) and the noise reduction box air inlet (211) are staggered in the front-rear direction of the noise reduction box (20), and / or The first connecting port (231) and the third connecting port (233) are staggered in the front-back direction of the noise reduction box (20).

11. The noise reduction box according to claim 10, characterized in that, The noise reduction box air inlet (211) is located in front of the second communication port (232), and / or The first connection port (231) is located in front of the third connection port (233).

12. The noise reduction box according to any one of claims 6-11, characterized in that, The partition assembly (23) includes a first partition (235), a second partition (236) arranged horizontally at vertical intervals, and a third partition (237) disposed between the first partition (235) and the second partition (236). The first chamber (24) is defined by the second partition (236) and the bottom of the box body (21) in the height direction of the box body (21). The second chamber (25) is defined by the first partition (235) and the second partition (236) in the height direction of the box body (21). The third chamber (26) is defined by the first partition (235) and the top of the box body (21) in the height direction of the box body (21). The first sub-chamber (251) and the second sub-chamber (252) are formed by the third partition (237) separating the second chamber (25).

13. The noise reduction box according to claim 12, characterized in that, The second partition (236) is at least partially made of a flexible material.

14. The noise reduction box according to claim 12, characterized in that, The portion of the second partition (236) that defines the second sub-chamber (252) has a microporous plate portion (2361). The partition assembly (23) further includes a fourth partition (238) disposed in the first chamber (24). The fourth partition (238) divides a damping region (242) in the first chamber (24) corresponding to the microporous plate portion (2361). The microporous plate portion (2361) is disposed on top of the damping region (242), such that a back cavity (241) is formed between the microporous plate portion (2361) and the damping region (242). The back cavity (241) is connected to the micropores on the microporous plate portion (2361).

15. The noise reduction box according to claim 14, characterized in that, A honeycomb structure (243) is provided within the damping area (242).

16. The noise reduction box according to claim 14, characterized in that, The microporous plate portion (2361) is recessed on the second partition (236).

17. The noise reduction box according to claim 14, characterized in that, The position of the microporous plate (2361) corresponds to that of the fan inlet (221).

18. The noise reduction box according to claim 14, characterized in that, The micropore diameter of the microporous plate (2361) is 0.1~5mm, the opening rate is 0.1%~20%, and the micropore spacing is 1~20 times the micropore diameter.

19. The noise reduction box according to claim 18, characterized in that, The micropore diameter of the microporous plate (2361) is 1~2mm, the opening rate is 4%, and the micropore spacing is 5~8 times the micropore diameter.

20. The noise reduction box according to claim 12, characterized in that, The first chamber (24) is provided with a flow guide assembly that guides the airflow in a curved path from the first connecting port (231) to the second connecting port (232); and / or The partition assembly (23) further includes a fifth partition (239) disposed in the third chamber (26), the fifth partition (239) separating an air outlet chamber (261) in the third chamber (26), and the fan outlet (222) and the noise reduction box outlet (212) are both connected to the air outlet chamber (261).

21. The noise reduction box according to claim 20, characterized in that, The third chamber (26) is provided with a honeycomb structure (243); and / or An air outlet pipe (262) is connected between the air outlet (222) of the fan and the air outlet (212) of the noise reduction box, and the air outlet pipe (262) passes through the air outlet chamber (261).

22. A ventilation therapy device, characterized in that, Includes the noise reduction box as described in any one of claims 1-21.

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