Ventilation noise reduction housing and assembly, ventilation humidifier, respiratory mask assembly and respiratory support device

Abstract

The present disclosure relates to a medical device field, and discloses a ventilation noise reduction housing and assembly, a ventilation moisturizing device, a respiratory mask assembly, and a respiratory support device. The ventilation noise reduction housing includes a respiratory passage segment, one end of the respiratory passage segment is a ventilation noise reduction housing connection end and the other end is a respiratory tube connection end, and the passage wall of the respiratory passage segment includes a ventilation noise reduction unit mounting wall segment, the ventilation noise reduction unit mounting wall segment is provided with an exhaust port and a support protrusion structure extending from an outer surface of the ventilation noise reduction unit mounting wall segment, the support protrusion structure is used to support a ventilation noise reduction core of a ventilation noise reduction unit provided on the ventilation noise reduction unit mounting wall segment, and at least partially maintain a ventilation gap between the ventilation noise reduction core and the outer surface of the ventilation noise reduction unit mounting wall segment. The ventilation noise reduction housing can reduce noise and improve hygiene, thereby improving the treatment effect.

Description

[Technical field]

[0001] [CROSS REFERENCE TO RELATED APPLICATIONS] This application claims priority to a Chinese patent, bearing application number 202120745619.0 and entitled "Ventilation Noise Reduction Housing and Assembly, Ventilation Moisturizing Device, Respiratory Mask Assembly and Respiratory Assistance Device," filed with the China Patent Office on April 13, 2021, the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of medical devices, and in particular to a ventilation noise reduction housing, a ventilation noise reduction assembly, a ventilation humidifier, a respiratory mask assembly, and a respiratory support device. [Background technology]

[0003] At present, the mask breathing system includes a respirator, a breathing tube and a breathing mask, the breathing mask includes a breathing chamber, the breathing chamber can accommodate the user's nose or nose and mouth, and is then fixed to the patient's face by a headband to form a sealed breathing chamber, thus the breathing tube delivers the breathable gas generated by the respirator to the sealed breathing chamber, thereby providing respiratory treatment to the user. In addition, in order to facilitate the user to exhaust the exhaled waste gas, the breathing mask is usually provided with an exhaust port, thus the exhaled waste gas can be exhausted through the exhaust port. When the exhaled waste gas passes through the exhaust port, it washes the side wall of the port, generating noise.

[0004] Therefore, a layer of filter cotton is arranged on the outside of the exhaust hole, so that the waste gas discharged from the exhaust hole can only be discharged through the filter cotton, and the filter cotton plays a mitigating role on the exhaled waste gas, thereby effectively reducing the noise.On the other hand, a new risk is introduced at the same time: due to the filtering function of the filter cotton, if it is used for a long time and not cleaned as required, dust will accumulate in the exhaust hole, which will reduce the flow rate value of the exhaust hole, and if it is not cleaned in a timely manner, it will block the exhaust hole, increasing the risk of use and failing to achieve the desired therapeutic effect.

[0005] In addition, in practical use, such respiratory treatment is usually long, for example, in many cases, the user needs to wear the respiratory mask all day and all night. When the air temperature is low and the air is dry, wearing the respiratory mask for a long time reduces the comfort of wearing it. Therefore, the respirator is usually provided with a heating and humidifying device, such as a water tank or a humidifier, and when the gas passes through the water tank or the humidifier, it carries a part of the water vapor and supplies the heated and humidified breathable gas to the user. However, the respirator is usually relatively large in volume and difficult to carry.

[0006] In view of the above circumstances, the solution of the present disclosure is proposed. Summary of the Invention [Problem to be solved by the invention]

[0007] One object of the present disclosure is to provide a ventilation noise reducing housing, which can reduce noise and improve hygiene, thereby improving the efficacy of treatment. [Means for solving the problem]

[0008] Therefore, the present disclosure provides a ventilation noise reduction housing, the ventilation noise reduction housing including a breathing passage segment, one end of the breathing passage segment being a ventilation noise reduction housing connecting end and the other end being a breathing tube connecting end, a passage wall of the breathing passage segment including a ventilation noise reduction unit mounting wall segment, the ventilation noise reduction unit mounting wall segment being provided with an exhaust port and a supporting protrusion structure extending from an outer surface of the ventilation noise reduction unit mounting wall segment, the supporting protrusion structure being used to support a ventilation noise reduction core of a ventilation noise reduction unit provided on the ventilation noise reduction unit mounting wall segment, and to maintain a ventilation gap at least in a portion between the ventilation noise reduction core and the outer surface of the ventilation noise reduction unit mounting wall segment.

[0009] In the technical solution, the ventilation noise reduction unit mounting wall segment is provided with an exhaust port and a supporting protrusion structure extending from an outer surface of the ventilation noise reduction unit mounting wall segment, and the supporting protrusion structure is used to support a ventilation noise reduction core of the ventilation noise reduction unit mounted on the ventilation noise reduction unit mounting wall segment, and maintain a ventilation gap at least in part between the ventilation noise reduction core and the outer surface of the ventilation noise reduction unit mounting wall segment; thus, in the actual use of the ventilation noise reduction housing, the ventilation noise reduction unit can be mounted on the ventilation noise reduction unit mounting wall segment, and at this time, the supporting protrusion structure supports the ventilation noise reduction core to maintain a ventilation gap at least in part between the ventilation noise reduction core and the outer surface of the ventilation noise reduction unit mounting wall segment. When the gap is maintained and the exhaled waste gas is discharged from the exhaust port, due to the presence of the ventilation gap, the exhaled waste gas passes through the ventilation gap and the ventilation noise reduction core and is discharged to the outside of the ventilation noise reduction unit. The ventilation noise reduction core has a mitigating effect on the exhaled waste gas, thereby reducing the noise generated by the exhaled waste gas washing the exhaust port and improving the silencing effect. In addition, although a small portion of foreign matter such as dust carried by the exhaled waste gas accumulates in the ventilation noise reduction core, most of the foreign matter smoothly passes through the ventilation gap together with the exhaled waste gas and is discharged to the outside of the ventilation noise reduction unit or accumulates in a position away from the exhaust port, thereby not clogging the exhaust port, further reducing the risk of use for the user and improving hygiene, thereby improving the treatment effect.

[0010] Further, the support protrusion structure is disposed adjacent to the exhaust port.

[0011] Additionally, the ventilation noise reduction unit mounting wall segment includes a radially outwardly extending end wall, the exhaust port and the support projection structure being formed in the end wall.

[0012] Furthermore, the support protrusion structure has an inclined surface between the upper surface of the radially outer end and the front end surface.

[0013] In one embodiment, the support projection structure includes a plurality of radially extending convex ribs spaced apart in a circumferential direction, and a plurality of the exhaust ports are spaced apart in a circumferential direction between adjacent radially extending convex ribs.

[0014] Optionally, in one embodiment, the plurality of exhaust ports are circumferentially spaced apart, and the support protrusion structure includes a circumferential protrusion, the circumferential protrusion being located radially outward of the exhaust ports.

[0015] Optionally, in one embodiment, the support protrusion structure includes a plurality of radially extending convex ribs spaced apart in the circumferential direction and a plurality of protrusion groups spaced apart in the circumferential direction, the exhaust ports being spaced apart in the circumferential direction between adjacent ones of the radially extending convex ribs, the plurality of protrusion groups being located radially outward of the exhaust ports, one protrusion group being located between adjacent ones of the radially extending convex ribs, each protrusion group including a plurality of spaced apart circumferential protrusions.

[0016] Further, the support protrusion structure includes a plurality of circumferentially convex rib segments and a plurality of radially extending convex ribs arranged at intervals in the circumferential direction, the exhaust ports being circumferentially spaced apart between adjacent ones of the radially extending convex ribs, and one of the circumferentially convex rib segments being arranged between adjacent ones of the radially extending convex ribs, the circumferentially convex rib segment being located radially outward of the exhaust ports.

[0017] The present application also provides a ventilation noise reduction assembly, the ventilation noise reduction assembly including a ventilation noise reduction unit and a ventilation noise reduction housing as described above, the ventilation noise reduction unit including a ventilation noise reduction core and an outer cover, a ventilation opening is formed in the outer cover, the outer cover is connected to the ventilation noise reduction unit mounting wall segment, the ventilation noise reduction core is provided between the outer cover and the ventilation noise reduction unit mounting wall segment and is supported by the support protrusion structure, a ventilation gap is maintained in at least a portion between the ventilation noise reduction core and an outer surface of the ventilation noise reduction unit mounting wall segment, and the exhaust port is in communication with the ventilation opening via the ventilation noise reduction core and the ventilation gap.

[0018] As described above, in the actual use of the ventilation noise reduction assembly, the support protrusion structure supports the ventilation noise reduction core to maintain at least a portion of the ventilation gap between the ventilation noise reduction core and the outer surface of the ventilation noise reduction unit mounting wall segment, so that when the exhaled waste gas is discharged from the exhaust hole, due to the presence of the ventilation gap, the exhaled waste gas passes through the ventilation gap and the ventilation noise reduction core and is discharged to the outside through the ventilation opening, and the ventilation noise reduction core has a buffering effect on the exhaled waste gas, thereby reducing the noise generated by the exhaled waste gas washing the exhaust port, improving the effect of silencing; and while a small portion of foreign matter such as dust carried by the exhaled waste gas accumulates in the ventilation noise reduction core, most of the foreign matter passes smoothly through the ventilation gap together with the exhaled waste gas and is discharged to the outside through the ventilation opening or accumulates in a position away from the exhaust port, thereby not clogging the exhaust port, further reducing the risk of use for the user and improving hygiene, thereby improving the therapeutic effect.

[0019] The present application also provides a ventilation and moisturizing device, the ventilation and moisturizing device comprising a ventilation and moisturizing device housing and a ventilation noise reduction housing as described above, the ventilation and moisturizing device housing being connected to the ventilation noise reduction housing connection end, the ventilation and moisturizing device housing comprising a respiratory mask connecting end, the ventilation and moisturizing device comprising a respiratory passage located between the respiratory mask connecting end and the respiratory tube connecting end, the respiratory passage comprising the respiratory passage segment, the respiratory passage comprising a ventilation and moisturizing unit accommodating segment located between the respiratory mask connecting end and the respiratory tube connecting end, the ventilation and moisturizing unit accommodating segment being used to accommodate and provide a ventilation and moisturizing unit that allows the passage of respiratory gas and slows the passage of moisture and heat in exhaled gas, and the ventilation noise reduction unit mounting wall segment being located between the ventilation and moisturizing unit accommodating segment and the respiratory tube connecting end.

[0020] In this technical solution, the ventilation and moisture unit accommodating segment is used to accommodate and install a ventilation and moisture unit that allows the passage of respiratory gas and slows down the passage of moisture and heat in the exhaled gas, and the ventilation and noise reduction unit mounting wall segment is located between the ventilation and moisture unit accommodating segment and the respiratory tube connecting end. Thus, in practical use, the ventilation and moisture unit that allows the passage of respiratory gas and slows down the passage of moisture and heat in the exhaled gas can be installed in the ventilation and moisture unit accommodating segment, the ventilation and moisture unit is used to allow the passage of respiratory gas and slows down the passage of moisture and heat in the exhaled gas, and the respiratory mask connecting end is connected to the respiratory mask. Thus, the gas (exhaust gas) exhaled by the wearer can pass through the ventilation and moisture unit and be discharged from the exhaust port. At this time, the moisture and heat in the exhaled gas are absorbed by the respiratory mask connecting end and the ventilation and moisture unit under the mitigating action of the ventilation and moisture unit. The humidity in the passage segment between the knitted material and the ventilation and moisture-retaining unit increases, and the moisture is condensed in the ventilation and moisture-retaining unit, which also increases the internal humidity of the ventilation and moisture-retaining unit; and the heat contained in the exhaled gas increases the temperature of the passage segment between the respiratory mask connecting end and the ventilation and moisture-retaining unit and the ventilation and moisture-retaining unit. Thus, when the breathable gas supplied to the wearer passes through the ventilation and moisture-retaining unit and the passage segment between the respiratory mask connecting end and the ventilation and moisture-retaining unit, under the action of the increased humidity and the increased temperature, the ventilation and moisture-retaining device can supply the wearer with a breathable gas that is moisturized and warmed, improving the comfort of wearing the respiratory mask; and the ventilation and moisture-retaining device can be connected to the respiratory mask and the breathing tube, and since the respiratory mask and the breathing tube are light and easy to carry, the ventilation and moisture-retaining device has a small volume, is flexible and easy to carry, and can thus flexibly and easily supply the moisturized and warmed breathing gas to the wearer of the respiratory mask. Of course, if necessary, the ventilation and moisture-retaining unit accommodating segment can be used to accommodate and provide at least two different types of ventilation and moisture-retaining units, so that the required ventilation and moisture-retaining units can be flexibly and easily replaced.As described above, the support protrusion structure supports the ventilation noise reducing core and maintains at least a portion of the ventilation gap between the ventilation noise reducing core and the outer surface of the ventilation noise reducing unit mounting wall segment, so that when the exhaled waste gas is discharged from the exhaust hole, the presence of the ventilation gap allows the exhaled waste gas to pass through the ventilation gap and the ventilation noise reducing core and be discharged to the outside through the ventilation opening, and the ventilation noise reducing core has a buffering effect on the exhaled waste gas, thereby reducing the noise generated by the exhaled waste gas washing the exhaust port and improving the silencing effect. In addition, a small portion of foreign matter such as dust carried by the exhaled waste gas accumulates in the ventilation noise reducing core, but most of the foreign matter passes smoothly through the ventilation gap together with the exhaled waste gas and is discharged to the outside through the ventilation opening or accumulates in a position away from the exhaust port, thereby preventing the exhaust port from being blocked, further reducing the risk of use for the user and improving hygiene, thereby improving the treatment effect.

[0021] Further, the ventilation and moisturizing device includes a ventilation noise reduction unit, the ventilation noise reduction unit including a ventilation noise reduction core and an outer cover, a ventilation opening is formed in the outer cover, the outer cover is connected to the ventilation noise reduction unit mounting wall segment, the ventilation noise reduction core is provided between the outer cover and the ventilation noise reduction unit mounting wall segment and supported by the support protrusion structure, a ventilation gap is maintained in at least a portion between the ventilation noise reduction core and an outer surface of the ventilation noise reduction unit mounting wall segment, and the exhaust port is connected to the ventilation opening through the ventilation noise reduction core and the ventilation gap.

[0022] The ventilation and moisturizing device further includes a ventilation and moisturizing unit, which is provided within the ventilation and moisturizing unit accommodating segment.

[0023] In addition, the ventilation and moisturizing unit includes an internal gas passage and an annular external gas slit provided outside the internal gas passage, and a ventilation and moisturizing core is provided within the internal gas passage, and the ventilation and moisturizing core is used to allow the passage of respiratory gas and to slow the passage of moisture and heat in the exhaled gas, and at least at the end of the ventilation and moisturizing unit facing the respiratory tube communication end, the annular outer wall of the external gas slit extends in the axial direction and exceeds the annular inner wall of the external gas slit, and one end of the annular inner wall includes an upwind deflection surface for deflecting a portion of the respiratory gas flowing in the axial direction so as to guide it to the external gas slit.

[0024] The present application also provides a respiratory mask assembly, comprising a respiratory mask and a ventilation noise reduction assembly as described above, the respiratory mask including a mask body having a breathing chamber, the breathing passage segment communicating with the breathing chamber or Or, The respiratory mask assembly includes a respiratory mask and any one of the above-described ventilation and humidification devices, the respiratory mask including a mask body having a breathing chamber, and the respiratory mask communication end communicating with the breathing chamber.

[0025] The present application also provides a respiratory assistance apparatus, comprising a respirator, a breathing tube and the above-described respiratory mask assembly, wherein the breathing apparatus communicates with the breathing tube connecting end via the breathing tube. [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a structural schematic diagram of a first ventilation noise reduction housing according to a specific embodiment of the present disclosure. [Diagram 2] FIG. 2 is a structural schematic diagram of a second ventilation noise reduction housing according to a specific embodiment of the present disclosure. [Diagram 3] FIG. 2 is a schematic half-section view of a ventilation noise reduction assembly according to certain embodiments of the present disclosure. [Figure 4] FIG. 4 is an enlarged schematic diagram of a portion of the structure of FIG. [Diagram 5]FIG. 2 is a schematic cross-sectional view of a ventilation and humidifying device according to a specific embodiment of the present disclosure, showing a ventilation and humidifying unit and a third ventilation noise reduction housing according to the present application. [Figure 6] FIG. 2 is a perspective view of another ventilation and humidification unit for use in a ventilation and humidification device according to a specific embodiment of the present disclosure. [Figure 7] FIG. 7 is a schematic cross-sectional view of the structure of FIG. [Figure 8] FIG. 2 is an exploded view of a respiratory mask assembly according to certain embodiments of the present disclosure. [Figure 9] FIG. 9 is an assembly view of the respiratory mask assembly of FIG. 8. [Figure 10] 13 is a schematic cross-sectional view of a ventilation and humidifying unit of another structure used in a ventilation and humidifying device according to a specific embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] In addition, the embodiments and features of the embodiments of the present disclosure may be combined with each other unless there is a contradiction. MODE FOR CARRYING OUT THE DISCLOSURE Hereinafter, the present disclosure will be described in detail with reference to the drawings and embodiments.

[0028] As shown in FIG. 1 and FIG. 2 , the present disclosure provides a ventilation noise reduction housing 14, which includes a breathing passage segment 1, one end of the breathing passage segment 1 is a ventilation noise reduction housing connection end 2 and the other end is a breathing tube communication end 3, the ventilation noise reduction housing connection end 2 may be connected to a ventilation and humidification device housing 18 described below or to other breathing tube members, the passage wall of the breathing passage segment 1 includes a ventilation noise reduction unit mounting wall segment 4, the ventilation noise reduction unit mounting wall segment 4 is provided with an exhaust port 5 and a support protrusion structure extending from the outer surface of the ventilation noise reduction unit mounting wall segment 4, the support protrusion structure is used to support the ventilation noise reduction core 7 of the ventilation noise reduction unit 6 provided on the ventilation noise reduction unit mounting wall segment 4, and to maintain a ventilation gap 8 at least in a part between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4.

[0029] In the technical solution, the ventilation noise reduction unit mounting wall segment 4 is provided with an exhaust port 5 and a supporting protrusion structure extending from the outer surface of the ventilation noise reduction unit mounting wall segment 4, and the supporting protrusion structure is used to support the ventilation noise reduction core 7 of the ventilation noise reduction unit 6 mounted on the ventilation noise reduction unit mounting wall segment 4, and maintain a ventilation gap 8 at least in part between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4. In this way, in the actual use of the ventilation noise reduction housing 14, the ventilation noise reduction unit 6 can be mounted on the ventilation noise reduction unit mounting wall segment 4, and the supporting protrusion structure supports the ventilation noise reduction core 7 to maintain a ventilation gap 8 at least in part between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4, and the ventilation noise reduction housing 14 can be used to support the ventilation noise reduction core 7 to maintain a ventilation gap 8 at least in part between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4, and to prevent the exhalation and When the exhaled waste gas is discharged from the exhaust port 5, due to the existence of the ventilation gap 8, the exhaled waste gas passes through the ventilation gap 8 and the ventilation noise reduction core 7 and is discharged to the outside of the ventilation noise reduction unit 6, and the flow of the exhaled waste gas may be exemplarily shown by the arrows in FIG. 4. The ventilation noise reduction core 7 has a mitigating effect on the exhaled waste gas, thereby reducing the noise generated by the exhaled waste gas washing the exhaust port 5, and improving the effect of silencing. In addition, a small portion of foreign matter such as dust carried by the exhaled waste gas is accumulated in the ventilation noise reduction core 7, but most of the foreign matter passes smoothly through the ventilation gap 8 together with the exhaled waste gas and is discharged to the outside of the ventilation noise reduction unit 6 or is accumulated in a position away from the exhaust port 5, thereby not blocking the exhaust port 5, which further reduces the risk of use for the user and improves hygiene, thereby improving the treatment effect.

[0030] The number of exhaust ports 5 may be one or more. The exhaust ports 5 may be arranged in a part of the circumferential wall of the ventilation noise reduction unit mounting wall segment 4 in the circumferential direction, for example, in half of the circumferential wall, or may be arranged in the entire circumferential wall of the ventilation noise reduction unit mounting wall segment 4.

[0031] In the ventilation noise reduction housing 14, the support protrusion structure may be provided at any position on the outer surface of the ventilation noise reduction unit mounting wall segment 4, as long as it supports the ventilation noise reduction core 7 of the ventilation noise reduction unit 6 provided on the ventilation noise reduction unit mounting wall segment 4 to maintain the ventilation gap 8 at least partially between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4. For example, the support protrusion structure may be provided at a position away from the exhaust port 5. Alternatively, the support protrusion structure is provided close to the exhaust port 5. In this way, in the case of the ventilation noise reduction core 7 made of a soft material, the support protrusion structure close to the exhaust port 5 can more easily support the ventilation noise reduction core 7, and the ventilation noise reduction core 7 can be prevented from covering all the exhaust ports 5. For example, in the case of a plurality of exhaust ports 5, the ventilation noise reduction core 7 can be prevented from blocking some of the exhaust ports 5.

[0032] In addition, in the ventilation noise reduction housing 14, the ventilation noise reduction unit mounting wall segment 4 may have various shapes, but regardless of the shape of the ventilation noise reduction unit mounting wall segment 4, it is only necessary that the ventilation noise reduction unit mounting wall segment 4 can be formed with the exhaust port 5 and the support protrusion structure and can mount the ventilation noise reduction unit 6. For example, in one structural form, the ventilation noise reduction unit mounting wall segment 4 includes an axial wall extending in the axial direction, the exhaust port is formed in the axial wall, and the support protrusion structure extends from the axial wall, and the ventilation noise reduction unit 6 can be mounted on the outer surface of the axial wall. Or, as shown in Figures 1-4, the ventilation noise reduction unit mounting wall segment 4 includes an end wall 9 extending radially outward, and the exhaust port 5 and the support protrusion structure are formed on the end wall 9, in this way, because the end wall 9 extends radially outward, the expired waste gas is more likely to be discharged from the exhaust port 5 along the axial direction when flowing along the breathing passage segment 1. 3 and 4, the end wall 9 can provide the ventilation noise reduction core 7 with a mounting step extending radially outward, thereby improving the reliability of mounting the ventilation noise reduction core 7 to the mounting step. Alternatively, the ventilation noise reduction unit mounting wall segment 4 includes an inclined wall that slopes axially outward, and the exhaust port 5 and the support protrusion structure are formed in the end wall 9.

[0033] 1 and 2, an inclined surface 29 is provided between the upper surface and the front end surface of the radially outer end of the support protrusion structure, that is, a part between the upper surface and the front end surface of the radially outer end of the support protrusion structure is cut out to form the inclined surface 29, and the space formed by cutting out the radially outer end can be used to accommodate the ventilation noise reducing core 7, thereby increasing the accommodation space of the ventilation noise reducing core 7. In this way, as shown in Figs. 3 and 4, when the ventilation noise reducing core 7 is supported by the support protrusion structure, a part of the ventilation noise reducing core 7 is curved and accommodated in the accommodation space, or the curved part of the ventilation noise reducing core 7 itself may be accommodated in the accommodation space.

[0034] In addition, in the ventilation noise reduction housing 14, the support protrusion structure may have various shapes, but regardless of the shape the support protrusion structure adopts, it is sufficient that it supports the ventilation noise reduction core 7 and maintains the ventilation gap 8 in at least a portion between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4. For example, in a first shape of the support protrusion structure, the support protrusion structure may include a first annular protrusion plate and a second annular protrusion plate, the first annular protrusion plate and the second annular protrusion plate are spaced apart from each other in the axial direction, or the first annular protrusion plate may be spaced apart from each other in the radial direction and located outside the second annular protrusion plate, the exhaust port 5 is located between the first annular protrusion plate and the second annular protrusion plate, the ventilation noise reduction core 7 is supported by the first annular protrusion plate and the second annular protrusion plate to maintain a ventilation gap 8 at least partially between the ventilation noise reduction unit mounting wall segment 4 and the outer surface thereof, and the first annular protrusion plate and the second annular protrusion plate are respectively formed with ventilation notches, so that a part of the exhaled waste gas discharged from the exhaust port 5 can be discharged from the ventilation noise reduction core 7, and the remaining part of the exhaled waste gas flows into the ventilation gap 8 through the ventilation notches. The first annular protrusion plate and the second annular protrusion plate may be provided on the axial wall, the end wall 9, or the inclined wall inclined outwardly in the axial direction.

[0035] Also, for example, in a second shape of the support protrusion structure, as shown in Figures 1 and 2, the support protrusion structure includes a plurality of radially extending convex ribs 10 spaced apart in the circumferential direction, and a plurality of exhaust ports 5 spaced apart in the circumferential direction are arranged between adjacent radially extending convex ribs 10, in this manner, the ventilation noise reduction core 7 is supported by the plurality of radially extending convex ribs 10 to maintain a ventilation gap 8 at least partially between the ventilation noise reduction unit mounting wall segment 4 and the outer surface thereof, and the radially extending convex ribs 10 can separate the exhaust ports 5 on both sides thereof, so that the exhaled waste gas discharged from the plurality of exhaust ports 5 between the two radially extending convex ribs 10 can quickly pass through the ventilation gap 8 and carry away foreign matter carried in the exhaled waste gas more quickly, thereby avoiding accumulation at the exhaust ports 5.

[0036] The radially extending convex ribs 10 may be provided on the axial wall, the end wall 9, or the inclined wall inclined axially outward. The radially extending convex ribs 10 may be disposed adjacent to the exhaust port. The radially outer ends of the radially extending convex ribs 10 may have an inclined surface 29 between the upper surface and the front end surface.

[0037] Also, for example, in a third shape of the support protrusion structure, as shown in FIG. 1, the exhaust ports 5 are spaced apart in the circumferential direction, and the support protrusion structure includes a plurality of spaced apart circumferential protrusions 12, which are located radially outward of the exhaust ports 5, and thus the ventilation noise reduction core 7 can be supported by the plurality of circumferential protrusions 12 to maintain at least a portion of the ventilation gap 8 between the ventilation noise reduction unit mounting wall segment 4 and the outer surface. The plurality of circumferential protrusions 12 spaced apart in the circumferential direction can support and lift the entire ventilation noise reduction core 7 to increase the ventilation gap 8, further avoiding blocking the exhaust ports 5 and improving safety. The plurality of circumferential protrusions 12 may be provided on the end wall 9, or on a sloping wall sloping outward in the axial direction. The plurality of circumferential protrusions 12 may be disposed close to the exhaust ports. The plurality of circumferential protrusions 12 may have a sloping surface 29 between the upper surface of the radially outer end and the front end surface.

[0038] Also, for example, in a fourth shape of the support protrusion structure, as shown in FIG. 1 , the support protrusion structure includes a plurality of radially extending convex ribs 10 arranged at intervals in the circumferential direction, and a plurality of protrusion groups 11 spaced apart in the circumferential direction, with exhaust ports 5 spaced apart in the circumferential direction between adjacent radially extending convex ribs 10, and the plurality of protrusion groups 11 being located radially outside the exhaust ports 5, with one protrusion group 11 arranged between adjacent radially extending convex ribs 10, and each protrusion group 11 including a plurality of circumferential protrusions 12 spaced apart. In this way, the ventilation noise reduction core 7 can be supported by the plurality of radially extending convex ribs 10 and the plurality of circumferential protrusions 12 to maintain at least a portion of the ventilation gap 8 between the ventilation noise reduction unit mounting wall segment 4 and the outer surface thereof, and the radially extending convex rib 10 can separate the exhaust ports 5 on both sides thereof, so that the exhaled waste gas discharged from the plurality of exhaust ports 5 between the two radially extending convex ribs 10 can pass through the ventilation gap 8 quickly and carry away foreign matter carried by the exhaled waste gas more quickly, thereby avoiding accumulation at the exhaust ports 5. The plurality of circumferential protrusions 12 of the plurality of circumferentially spaced protrusions 11 can further support and lift the entire ventilation noise reduction core 7 to increase the ventilation gap 8, further avoiding blocking of the exhaust ports 5 and improving safety.

[0039] Also, for example, in a fifth shape of the support protrusion structure, as shown in FIG. 2, the support protrusion structure includes a plurality of circumferentially protruding rib segments 13 and a plurality of radially extending convex ribs 10 arranged at intervals in the circumferential direction, exhaust ports 5 that are circumferentially spaced apart are arranged between adjacent radially extending convex ribs 10, and one circumferentially protruding rib segment 13 is arranged between adjacent radially extending convex ribs 10, the circumferentially protruding rib segment 13 is located radially outside the exhaust ports 5, and the circumferentially protruding rib segment 13 is spaced apart from the radially extending convex ribs 10 at both circumferential ends thereof. In this way, the ventilation noise reduction core 7 is supported by the plurality of radially extending convex ribs 10 and the plurality of circumferentially extending convex rib segments 13 to maintain at least a portion of the ventilation gap 8 between the ventilation noise reduction unit mounting wall segment 4 and the radially extending convex rib 10 can separate the exhaust ports 5 on both sides thereof, so that the exhaled waste gas discharged from the plurality of exhaust ports 5 between the two radially extending convex ribs 10 can quickly pass through the ventilation gap 8 and can carry away foreign matter carried by the exhaled waste gas more quickly, thereby avoiding accumulation at the exhaust ports 5. In addition, the circumferentially extending convex rib segments 13 can support and lift the entire ventilation noise reduction core 7 to increase the ventilation gap 8, further avoiding blocking the exhaust ports 5 and improving safety.

[0040] Also, the ventilation noise reduction housing 14 may be PP, PC, nylon or polycarbonate PC, preferably PC material. The thickness of the housing wall of the ventilation noise reduction housing 14 is 1-3mm, preferably 1.5mm. As for the internal dimension of the exhaust port 5, for example, the diameter is 0.5-1.5mm, preferably 0.8mm. When there are multiple exhaust ports 5, the interval between the exhaust ports 5 is 2-8mm, preferably 4mm. Also, the height of the radially extending convex rib 10, the circumferential protrusion 12 and the circumferential protruding rib segment 13 may be 0.5mm-3.5mm, preferably 1mm, and the thickness of the radially extending convex rib 10, the circumferential protrusion 12 and the circumferential protruding rib segment 13 is 0.5mm-2mm, preferably 1mm.

[0041] In addition, the ventilation noise reducing housing connecting end 2 may have various structural forms, but only needs to be able to connect the ventilation noise reducing housing 14. For example, as shown in Fig. 3, the ventilation noise reducing housing connecting end 2 is a connecting tube, and a connecting thread is formed on the outer surface or inner surface of the connecting tube.

[0042] The present disclosure also provides a ventilation noise reduction assembly 23, as shown in Figures 3, 4 and 8, the ventilation noise reduction assembly 23 includes a ventilation noise reduction unit 6 and a ventilation noise reduction housing 14 described in any one of the above, the ventilation noise reduction unit 6 includes a ventilation noise reduction core 7 and an outer cover 15, a ventilation opening 16 is formed in the outer cover 15, the outer cover 15 is connected to the ventilation noise reduction unit mounting wall segment 4, the ventilation noise reduction core 7 is provided between the outer cover 15 and the ventilation noise reduction unit mounting wall segment 4 and supported by a support protrusion structure, a ventilation gap 8 is maintained in at least a portion between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4, and the exhaust port 5 is in communication with the ventilation opening 16 via the ventilation noise reduction core 7 and the ventilation gap 8.

[0043] As described above, in the actual use of the ventilation noise reduction assembly 23, the support protrusion structure supports the ventilation noise reduction core 7 and maintains the ventilation gap 8 at least partially between the ventilation noise reduction core 7 and the outer surface of the ventilation noise reduction unit mounting wall segment 4, so that when the exhaled waste gas is discharged from the exhaust port 5, due to the presence of the ventilation gap 8, the exhaled waste gas passes through the ventilation gap 8 and the ventilation noise reduction core 7 and is discharged to the outside of the ventilation noise reduction unit 6. The flow of the exhaled waste gas may be exemplarily shown by the arrow in FIG. 4, and the ventilation noise reduction core 7 has a flow rate of 1000 sq. m. By playing a mitigating role, the noise generated by the exhaled waste gas washing through the exhaust port 5 is reduced, and the effect of silencing is improved; and although a small portion of foreign matter such as dust carried by the exhaled waste gas is accumulated in the ventilation noise reduction core 7, most of the foreign matter passes smoothly through the ventilation gap 8 together with the exhaled waste gas and is discharged to the outside of the ventilation noise reduction unit 6 or is accumulated at a position away from the exhaust port 5, thereby preventing the exhaust port 5 from being blocked, which further reduces the risk of use for the user and improves hygiene, thereby improving the treatment effect.

[0044] The ventilation noise reducing core 7 may be filter cotton or silk. In addition, the ventilation noise reducing core 7 may select a shape corresponding to the arrangement shape of the exhaust port 5. For example, in the case of the exhaust port 5 shown in Figures 1 and 2, the ventilation noise reducing core 7 may be an annular body as shown in Figure 8.

[0045] In addition, the outer cover 15 may have various structural forms. For example, the outer cover 15 may be an annular mesh, and the annular mesh may be engaged and connected to the passage segment. For example, as shown in FIG. 8, the outer cover 15 includes an outer annular body and an inner annular body, the inner annular body is arranged in an annular space, and the outer annular body is connected to the inner annular body through a plurality of connecting strips arranged in an annular space and spaced apart in the circumferential direction, the plurality of connecting strips partition the annular space to form the ventilation opening 16, and the connecting strips can restrict the filter cotton assembled therein and stabilize the filter cotton assembled therein. Thus, as shown in FIG. 8 and FIG. 9, in one embodiment, the breathing tube connecting end can pass through the inner annular body, and the outer annular body is connected to the breathing passage segment, thereby positioning the annular filter cotton to cover a plurality of exhaust ports 5 arranged in an annular space, and further reducing the exhaust noise.

[0046] The present disclosure also provides a ventilation and moisturizing device, as shown in Figures 5, 8 and 9, the ventilation and moisturizing device 17 includes a ventilation and moisturizing device housing 18 and any of the ventilation noise reduction housings 14 described above, the ventilation and moisturizing device housing 18 is connected to the ventilation noise reduction housing connection end 2, the ventilation and moisturizing device housing 18 includes a respiratory mask connecting end 19, the ventilation and moisturizing device 17 includes a respiratory passage 20 located between the respiratory mask connecting end 19 and the respiratory tube connecting end 3, the respiratory passage 20 includes a respiratory passage segment 1, the respiratory passage 20 includes a ventilation and moisturizing unit accommodating segment 21 located between the respiratory mask connecting end 19 and the respiratory tube connecting end 3, the ventilation and moisturizing unit accommodating segment 21 is used to accommodate and provide a ventilation and moisturizing unit 22 that allows the passage of respiratory gas and slows the passage of moisture and heat in the exhaled gas, and the ventilation noise reduction unit mounting wall segment 4 is located between the ventilation and moisturizing unit accommodating segment 21 and the respiratory tube connecting end 3.

[0047] In this technical solution, the ventilation and moisture-retaining unit accommodating segment 21 is used to accommodate and install the ventilation and moisture-retaining unit 22 that allows the passage of respiratory gas and slows down the passage of moisture and heat in the exhaled gas, and the ventilation and noise reduction unit mounting wall segment 4 is located between the ventilation and moisture-retaining unit accommodating segment 21 and the respiratory tube connecting end 3. Thus, in practical use, the ventilation and moisture-retaining unit 22 that allows the passage of respiratory gas and slows down the passage of moisture and heat in the exhaled gas can be installed in the ventilation and moisture-retaining unit accommodating segment 21, the ventilation and moisture-retaining unit 22 is used to allow the passage of respiratory gas and slows down the passage of moisture and heat in the exhaled gas, and the respiratory mask connecting end is connected to the respiratory mask. Thus, the gas (exhaust gas) exhaled by the wearer can pass through the ventilation and moisture-retaining unit and be discharged from the exhaust port, and at this time, the moisture and heat in the exhaled gas are absorbed through the respiratory mask connecting end under the mitigating action of the ventilation and moisture-retaining unit. The humidity in the passage segment between the respiratory mask connecting end and the ventilation and moisture unit increases, and the moisture is condensed in the ventilation and moisture unit, so that the internal humidity of the ventilation and moisture unit also increases; and the heat contained in the exhaled gas increases the temperature of the passage segment between the respiratory mask connecting end and the ventilation and moisture unit and the ventilation and moisture unit. Thus, when the breathable gas supplied to the wearer passes through the ventilation and moisture unit and the passage segment between the respiratory mask connecting end and the ventilation and moisture unit, under the action of the increased humidity and the increased temperature, the ventilation and moisture device can supply the wearer with a moisturized and warmed breathable gas, improving the comfort of wearing the respiratory mask; and the ventilation and moisture device can be connected to the respiratory mask and the breathing tube, and since the respiratory mask and the breathing tube are light and easy to carry, the ventilation and moisture device has a small volume, is flexible and easy to carry, so that the moisturized and warmed breathing gas can be flexibly and easily supplied to the wearer of the respiratory mask. Of course, if necessary, the ventilation and moisture unit storage segment can be used to store and provide at least two different types of ventilation and moisture units, so that the required ventilation and moisture units can be flexibly and easily replaced.As described above, the support protrusion structure supports the ventilation noise reducing core and maintains at least a portion of the ventilation gap between the ventilation noise reducing core and the outer surface of the ventilation noise reducing unit mounting wall segment, so that when the exhaled waste gas is discharged from the exhaust hole, the presence of the ventilation gap allows the exhaled waste gas to pass through the ventilation gap and the ventilation noise reducing core and be discharged to the outside through the ventilation opening, and the ventilation noise reducing core has a buffering effect on the exhaled waste gas, thereby reducing the noise generated by the exhaled waste gas washing the exhaust port and improving the silencing effect. In addition, a small portion of foreign matter such as dust carried by the exhaled waste gas accumulates in the ventilation noise reducing core, but most of the foreign matter passes smoothly through the ventilation gap together with the exhaled waste gas and is discharged to the outside through the ventilation opening or accumulates in a position away from the exhaust port, thereby preventing the exhaust port from being blocked, further reducing the risk of use for the user and improving hygiene, thereby improving the treatment effect.

[0048] 8 and 9, the ventilation and humidifying device includes a ventilation and noise reducing unit 6, the ventilation and noise reducing unit 6 includes a ventilation and noise reducing core 7 and an outer cover 15, the outer cover 15 is formed with a ventilation opening 16, the outer cover 15 is connected to the ventilation and noise reducing unit mounting wall segment 4, the ventilation and noise reducing core 7 is provided between the outer cover 15 and the ventilation and noise reducing unit mounting wall segment 4 and is supported by a support protrusion structure, and a ventilation gap 8 is maintained at least partially between the ventilation and noise reducing core 7 and the outer surface of the ventilation and noise reducing unit mounting wall segment 4, and the exhaust port 5 communicates with the ventilation opening 16 through the ventilation and noise reducing core 7 and the ventilation gap 8. Thus, as described above, the ventilation and humidifying device can easily supply moisturized and warmed respiratory gas to the wearer of the respiratory mask, reduce exhaust noise, and improve hygiene.

[0049] Also, the ventilation and moisturizing device does not have to include the ventilation and moisturizing unit 22, but in practical use, the ventilation and moisturizing unit 22 may be assembled in the ventilation and moisturizing unit accommodating segment 21. Or, as shown in one embodiment in Fig. 5 and another embodiment in Fig. 8 and Fig. 9, the ventilation and moisturizing device includes the ventilation and moisturizing unit 22, which is provided in the ventilation and moisturizing unit accommodating segment 21, that is, in the ventilation and moisturizing device as an independent product, the ventilation and moisturizing unit 22 is assembled in the ventilation and moisturizing unit accommodating segment 21.

[0050] In addition, the ventilation and moisture-retaining unit 22 may have various forms. For example, FIG. 5 shows one type of ventilation and moisture-retaining unit 22, and FIG. 8 shows two types of ventilation and moisture-retaining units 22 with different specifications. For example, as shown in FIG. 6 and FIG. 7, the ventilation and moisture-retaining unit 22 includes an internal gas passage 25 and an annular external gas slit 26, and a ventilation and moisture-retaining core 27 is provided in the internal gas passage 25, which allows the passage of respiratory gas and eases the passage of moisture and heat in the respiratory gas. Thus, as shown in FIG. 7, the respiratory waste gas can directly impact the end plane of the ventilation and moisture-retaining core 27, and as shown by the arrow in FIG. 7, the respiratory waste gas is dispersed into the external gas slit 26, and during the respiratory process, the respiratory airflow and the respiratory waste gas offset each other, which further weakens the respiratory waste gas passing through the external gas slit 26, and further reduces the noise caused by the respiratory airflow impacting the external gas slit 26. Compared with the supplied respiratory airflow, the flow rate of the gas exhaled by a human is weak, and under the action of the supplied relatively strong respiratory airflow, the exhaled waste gas passes through the internal gas passage 25 more, which can also further improve the moisture retention and heat retention performance.

[0051] In addition, as shown in FIG. 10, in another optional embodiment of the ventilation and moisturizing unit 22, the ventilation and moisturizing unit 22 includes an internal gas passage 25 and an annular external gas slit 26 provided outside the internal gas passage 25, and a ventilation and moisturizing core 27 is provided in the internal gas passage 25, which is used to allow the passage of respiratory gas and to slow down the passage of moisture and heat in the exhaled gas, and at least at the end of the ventilation and moisturizing unit 22 facing the respiratory tube communication end 3, the annular outer wall 30 of the external gas slit 26 extends in the axial direction and exceeds the annular inner wall 31 of the external gas slit 26, and one end of the annular inner wall 31 includes an upwind deflection surface 32 that deflects a portion of the respiratory gas flowing in the axial direction to guide it to the external gas slit 26. 10, the annular outer wall 30 of the external gas slit 26 extends in the axial direction beyond the annular inner wall 31 of the external gas slit 26, thus the axial length of the ventilation and moisture-retaining core 27 can be reduced in the internal gas passage 25, the resistance of the external gas slit 26 is small, and the gas resistance of the internal gas passage 25 is large, thus the flow rate of the external gas slit 26 is fast, and the flow rate of the internal gas passage 25 is slow, thereby causing an internal and external pressure difference, so that more breathing gas passes through the external gas slit 26, thus the resistance of the breathing gas is greatly reduced, so that the patient can inhale the breathing gas more easily. Also, as shown by the curved arrow in FIG. 10, the windward deflection surface 32 can deflect some of the breathing gas flowing in the axial direction to guide it to the external gas slit 26, and some of the gas is deflected to reach the inner surface of the annular outer wall 31 and is deflected again to offset the intake airflow, thereby weakening the energy of the airflow, and further reducing the noise caused by the breathing airflow impacting the housing of the ventilation and moisture-retaining unit 22. Compared with the respiratory airflow entering from the inhalation end, the flow rate of the human exhaled gas is weak, and under a relatively strong airflow, the exhaled gas passes through the ventilation and moisture retaining core 27 in the internal gas passage 25 more, which can also improve the moisture retaining performance.

[0052] Also, the windward-side deflection surface 32 can be formed at one end of the annular inner wall 31 in various ways. For example, a part of the end of the annular inner wall 31 shown in Fig. 7 may be cut off, so that the end face of the annular inner wall 31 shown in Fig. 7 serves as the windward-side deflection surface 32. Alternatively, an annular windward-side deflection plate may be provided at one end of the annular inner wall 31, and the plate surface of the windward-side deflection plate may function as the windward-side deflection surface 32.

[0053] Moreover, the breathing tube communication end 3 may be directly connected to the breathing tube, or may be used to fit a connecting sleeve 28, which may be connected to the breathing tube.

[0054] The present disclosure also provides a respiratory mask assembly, as shown in Figures 8 and 9, which includes a respiratory mask and the above-described ventilation noise reduction assembly 23, the respiratory mask includes a mask body 24 having a breathing chamber, and the breathing passage segment 1 communicates with the breathing chamber, for example, the breathing passage segment 1 may be directly connected to the mask body 24, or may be connected to the mask body 24 via another tube member of the respiratory mask assembly, such as a hose, etc. In this way, the quality of the respiratory mask assembly is effectively improved as described above.

[0055] The present disclosure also provides a respiratory mask assembly, as shown in Figures 8 and 9, which includes a respiratory mask and any one of the above-described ventilation and moisture repellent devices 17, the respiratory mask includes a mask body 24 having a breathing chamber, and the respiratory mask connecting end 19 is connected to the breathing chamber, for example, the respiratory mask connecting end 19 may be directly connected to the mask body 24, or may be connected to the mask body 24 via another tube member of the respiratory mask assembly, such as a hose, etc. In this way, as described above, the quality of the respiratory mask assembly is effectively improved.

[0056] Finally, the present disclosure provides a respiratory assistance device, which includes a respirator (not shown), a breathing tube (not shown) and the above-described respiratory mask assembly, and the breathing device communicates with the breathing tube connecting end 3 via the breathing tube. In this way, the quality of the respiratory assistance device is effectively improved as described above.

[0057] Although the preferred embodiments of the present disclosure have been described in detail above with reference to the drawings, the present disclosure is not limited thereto. Various simple modifications can be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, including combining each specific technical feature in any suitable manner. In order to avoid unnecessary duplication, the present disclosure does not separately describe various possible combination forms, but these simple modifications and combinations should also be regarded as the contents disclosed in the present disclosure and belong to the protection scope of the present disclosure. [Explanation of symbols]

[0058] 1 - breathing passage segment, 2 - ventilation noise reduction housing connection end, 3 - breathing tube communication end, 4 - ventilation noise reduction unit mounting wall segment, 5 - exhaust port, 6 - ventilation noise reduction unit, 7 - ventilation noise reduction core, 8 - ventilation gap, 9 - end wall, 10 - radially extending convex rib, 11 - protrusion group, 12 - circumferential protrusion, 13 - circumferential convex rib segment, 14 - ventilation noise reduction housing, 15 - outer cover, 16 - ventilation opening, 17 - ventilation moisture device, 18 - ventilation moisture device housing, 19 - breathing mask communication end, 20 - breathing passage, 21 - ventilation moisture unit receiving segment, 22 - ventilation moisture unit, 23 - ventilation noise reduction assembly, 24 - mask body, 25 - internal gas passage, 26 - external gas slit, 27 - ventilation moisture core, 28 - connection sleeve, 29 - inclined surface, 30 - annular outer wall, 31 - annular inner wall, 32 - windward deflection surface

Claims

1. A ventilation noise reduction housing, comprising: a breathing passage segment (1); The breathing passage segment (1) has one end connected to a ventilation noise reduction housing (2); The other end is a breathing tube communication end (3), The passage wall of the breathing passage segment (1) includes a ventilation noise reduction unit mounting wall segment (4), The ventilation noise reduction unit mounting wall segment (4) is provided with an exhaust port (5) and a support protrusion structure extending from an outer surface of the ventilation noise reduction unit mounting wall segment (4); the support protrusion structure is used to support a ventilation noise reduction core (7) of a ventilation noise reduction unit (6) provided on the ventilation noise reduction unit mounting wall segment (4) to maintain a ventilation gap (8) at least in a portion between the ventilation noise reduction core (7) and an outer surface of the ventilation noise reduction unit mounting wall segment (4); the support projection structure includes a plurality of radially extending convex ribs (10) spaced apart in the circumferential direction, with a plurality of the exhaust ports (5) spaced apart in the circumferential direction between adjacent radially extending convex ribs (10); Or, a plurality of said exhaust ports (5) spaced apart in a circumferential direction, said support protrusion structure including a circumferential protrusion (12), said circumferential protrusion (12) being located radially outward of said exhaust ports (5).

2. A ventilation noise reduction housing, comprising: a breathing passage segment (1); The breathing passage segment (1) has one end connected to a ventilation noise reduction housing (2); The other end is a breathing tube communication end (3), The passage wall of the breathing passage segment (1) includes a ventilation noise reduction unit mounting wall segment (4), The ventilation noise reduction unit mounting wall segment (4) is provided with an exhaust port (5) and a support protrusion structure extending from an outer surface of the ventilation noise reduction unit mounting wall segment (4); the support protrusion structure is used to support a ventilation noise reduction core (7) of a ventilation noise reduction unit (6) provided on the ventilation noise reduction unit mounting wall segment (4) to maintain a ventilation gap (8) at least in a portion between the ventilation noise reduction core (7) and an outer surface of the ventilation noise reduction unit mounting wall segment (4); 1. A ventilation noise reduction housing, comprising: a support projection structure including a plurality of radially extending convex ribs (10) spaced apart in the circumferential direction; and a plurality of projection groups (11) spaced apart in the circumferential direction, the exhaust ports (5) being spaced apart in the circumferential direction between adjacent radially extending convex ribs (10), the plurality of projection groups (11) being located radially outward of the exhaust ports (5), one projection group (11) being located between adjacent radially extending convex ribs (10), each projection group (11) including a plurality of spaced apart circumferential projections (12).

3. A ventilation noise reduction housing, comprising: a breathing passage segment (1); The breathing passage segment (1) has one end connected to a ventilation noise reduction housing (2); The other end is a breathing tube communication end (3), The passage wall of the breathing passage segment (1) includes a ventilation noise reduction unit mounting wall segment (4), The ventilation noise reduction unit mounting wall segment (4) is provided with an exhaust port (5) and a support protrusion structure extending from an outer surface of the ventilation noise reduction unit mounting wall segment (4); the support protrusion structure is used to support a ventilation noise reduction core (7) of a ventilation noise reduction unit (6) provided on the ventilation noise reduction unit mounting wall segment (4) to maintain a ventilation gap (8) at least in a portion between the ventilation noise reduction core (7) and an outer surface of the ventilation noise reduction unit mounting wall segment (4); the support projection structure includes a plurality of circumferentially extending convex ribs (13) and a plurality of radially extending convex ribs (10) arranged at intervals in the circumferential direction, the exhaust ports (5) being arranged between adjacent radially extending convex ribs (10) which are circumferentially spaced apart, one of the circumferentially extending convex ribs (13) being arranged between adjacent radially extending convex ribs (10), the circumferentially extending convex rib segment (13) being located radially outward of the exhaust ports (5).

4. The ventilation noise reduction housing according to any one of claims 1 to 3, characterized in that the support protrusion structure is provided adjacent to the exhaust port (5).

5. The ventilation noise reduction housing of any one of claims 1 to 3, characterized in that the ventilation noise reduction unit mounting wall segment (4) includes an end wall (9) extending radially outward, and the exhaust port (5) and the support protrusion structure are formed in the end wall (9).

6. 6. The ventilation noise reduction housing according to claim 5, further comprising an inclined surface (29) between an upper surface and a front end surface of the radially outer end of the support projection structure.

7. A ventilation noise reduction assembly comprising a ventilation noise reduction unit (6) and a ventilation noise reduction housing (14) according to any one of claims 1 to 3, the ventilation noise reduction unit (6) comprises a ventilation noise reduction core (7) and an outer cover (15), the outer cover (15) is formed with a ventilation opening (16), the outer cover (15) is connected to the ventilation noise reduction unit mounting wall segment (4), the ventilation noise reduction core (7) is provided between the outer cover (15) and the ventilation noise reduction unit mounting wall segment (4) and is supported by the support protrusion structure, a ventilation gap (8) is maintained between at least a portion of the ventilation noise reduction core (7) and an outer surface of the ventilation noise reduction unit mounting wall segment (4), and the exhaust port (5) communicates with the ventilation opening (16) through the ventilation noise reduction core (7) and the ventilation gap (8).

8. A ventilation and humidification device (17) comprising a ventilation and humidification device housing (18) and a ventilation noise reduction housing (14) according to any one of claims 1 to 3, the ventilation and humidifying device housing (18) is connected to the ventilation noise reduction housing connection end (2), the ventilation and humidifying device housing (18) includes a breathing mask connection end (19), the ventilation and humidifying device (17) includes a breathing passage (20) located between the breathing mask connection end (19) and the breathing tube connection end (3), the breathing passage (20) including the breathing passage segment (1); The breathing passage (20) includes a ventilation and moisture-retaining unit accommodating segment (21) located between the breathing mask connecting end (19) and the breathing tube connecting end (3), and the ventilation and moisture-retaining unit accommodating segment (21) is used to accommodate a ventilation and moisture-retaining unit (22) that allows the passage of breathing gas; The ventilation and humidifying device is characterized in that the ventilation noise reduction unit mounting wall segment (4) is located between the ventilation and humidifying unit accommodating segment (21) and the breathing tube communication end (3).

9. 9. The ventilation and moisturizing device according to claim 8, characterized in that the ventilation and moisturizing device includes a ventilation noise reduction unit (6), the ventilation noise reduction unit (6) includes a ventilation noise reduction core (7) and an outer cover (15), the outer cover (15) is formed with a ventilation opening (16), the outer cover (15) is connected to the ventilation noise reduction unit mounting wall segment (4), the ventilation noise reduction core (7) is provided between the outer cover (15) and the ventilation noise reduction unit mounting wall segment (4) and is supported by the support protrusion structure, a ventilation gap (8) is maintained at least in a part between the ventilation noise reduction core (7) and an outer surface of the ventilation noise reduction unit mounting wall segment (4), and the exhaust port (5) communicates with the ventilation opening (16) through the ventilation noise reduction core (7) and the ventilation gap (8).

10. 9. The ventilation and moisturizing device according to claim 8, characterized in that the ventilation and moisturizing device includes a ventilation and moisturizing unit (22), the ventilation and moisturizing unit (22) being provided within the ventilation and moisturizing unit accommodating segment (21).

11. 11. The ventilation and moisture retaining device according to claim 10, characterized in that the ventilation and moisture retaining unit (22) includes an internal gas passage (25) and an annular external gas slit (26) provided outside the internal gas passage (25), a ventilation and moisture retaining core (27) is provided in the internal gas passage (25), the ventilation and moisture retaining core (27) is used to allow the passage of respiratory gas, at least at an end of the ventilation and moisture retaining unit (22) facing the respiratory tube communication end (3), an annular outer wall (30) of the external gas slit (26) extends in the axial direction and exceeds an annular inner wall (31) of the external gas slit (26), and one end of the annular inner wall (31) includes an upwind deflection surface (32) for deflecting a portion of the respiratory gas flowing in the axial direction so as to guide it to the external gas slit (26).

12. A respiratory mask assembly comprising a respiratory mask and a ventilation noise reduction assembly (23) according to claim 7, wherein the respiratory mask comprises a mask body (24) having a breathing chamber, and the breathing passage segment (1) is in communication with the breathing chamber or Or, The respiratory mask assembly includes a respiratory mask and a ventilation and moisturizing device (17) according to any one of claims 8, the respiratory mask including a mask body (24) having a breathing chamber, and the respiratory mask connection end (19) is connected to the breathing chamber.

13. A respiratory assistance device comprising a respirator, a breathing tube and the respiratory mask assembly of claim 12, wherein the breathing device is in communication with the breathing tube connection end (3) via the breathing tube.

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