Ventilation component and ventilation treatment device
By setting curved airways in the ventilation components and extending the airflow path, the problems of complex installation and large space occupation of the noise reduction box are solved, achieving airway stability and noise reduction, which is suitable for small ventilation therapy equipment.
Patent Information
- Application Number
- CN202423291160.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2034-12-30
AI Technical Summary
In existing ventilation therapy equipment, noise reduction boxes are complex to install, costly, and occupy a large amount of space in the main unit, making them unsuitable for compact models.
By incorporating curved airways in the ventilation components to extend the airflow path and guide airflow within the airways, a stable flow noise reduction method is achieved, replacing the traditional noise reduction box.
This achieves airflow stability and noise reduction in a smaller space, thereby reducing product costs and improving user experience.
Smart Images
Figure CN223794881U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to ventilation treatment technical field, concretely relates to a ventilation component and ventilation treatment equipment including the ventilation component. BACKGROUND
[0002] In modern clinical medicine, ventilation treatment equipment (for example, a breathing machine) as an effective means capable of replacing human self-ventilation has been widely applied in respiratory failure, anesthesia and respiratory management during major surgery, respiratory support treatment and emergency resuscitation.
[0003] In order to improve user experience, the existing breathing machine usually adopts various different air path modes to ensure flow stability. The common air path mode on the market is to set the fan in the noise reduction box to achieve the purpose of stable flow and noise reduction. In general, the airflow enters the fan through a predetermined air path, such as a "straight up and straight down" mode, and circulates in the noise reduction box to achieve the effect of stable flow with a long air path.
[0004] However, through market testing, the noise reduction box stable flow and noise reduction mode has the following disadvantages: 1. The noise reduction box is usually sealed by upper and lower shells and silica gel and fixed by screws. This assembly method is complex and has high cost; 2. The installation of the noise reduction box requires a large host space, and the noise reduction box cannot be used for some small and compact models. UTILITY MODEL CONTENTS
[0005] The utility model aims at overcoming the problems of the existing ventilation treatment equipment in installing the noise reduction box, and provides a ventilation component and ventilation treatment equipment including the ventilation component. The ventilation component can replace the noise reduction box to realize air path flow stability and noise improvement, and can be applied to ventilation treatment equipment with small and compact host.
[0006] In order to achieve the above-mentioned purpose, the utility model provides a ventilation component on one hand, which is used for setting in ventilation treatment equipment. The ventilation component includes a ventilation pipe body. The inside of the ventilation pipe body defines a curved air passage for prolonging the airflow circulation path. The air inlet of the air passage is used for corresponding communication with the host air inlet of the ventilation treatment equipment. The air outlet of the air passage is used for corresponding communication with the air inlet of the fan in the ventilation treatment equipment.
[0007] In some embodiments, the air passage is configured as a structure spirally extending around the central axis of the ventilation pipe body.
[0008] In some embodiments, the cross-sectional area of the air passage is gradually reduced from the air inlet to the air outlet.
[0009] In some embodiments, the inner wall surface of the air passage is smooth.
[0010] In some embodiments, the ventilation pipe body defines one air passage inside, and the air inlet of the air passage has a cross-sectional area greater than or equal to that of the air inlet of the fan.
[0011] In some embodiments, the ventilation pipe body defines multiple air passages inside, and the total cross-sectional area of the air inlets of the multiple air passages is greater than or equal to that of the air inlet of the fan.
[0012] In some embodiments, the ventilation pipe body defines multiple air passages inside, preferably, the multiple air passages have the same spiral direction; preferably, the multiple air passages are arranged in layers radially outward from the center of the ventilation pipe body.
[0013] In some embodiments, the cross-sectional areas of the air passages in the same cross-section between layers are different.
[0014] In some embodiments, the cross-sectional areas of the air passages in the same cross-section of each layer are equal.
[0015] In some embodiments, the distances between the air inlets of adjacent air passages of each layer are equal.
[0016] In some embodiments, the distances between the air outlets of adjacent air passages of each layer are equal.
[0017] In some embodiments, the air inlets and air outlets of the air passages are circular.
[0018] In some embodiments, the ventilation pipe body has an air inlet end face and an air outlet end face formed at the two axial ends thereof, the air inlets of the air passages are located on the air inlet end face, and the air outlets of the air passages are located on the air outlet end face.
[0019] In some embodiments, the air inlet end face is formed as a spherical surface recessed towards the inside of the ventilation pipe body.
[0020] In some embodiments, the air outlet end face is formed as a spherical surface recessed towards the inside of the ventilation pipe body.
[0021] In some embodiments, the wall thickness of the ventilation pipe body for defining the air passages is uniform.
[0022] In some embodiments, the ventilation component comprises a detection pipe body arranged on one radial side of the ventilation pipe body and extending axially along the ventilation pipe body, for detecting the pressure difference between the two ends of the ventilation pipe body.
[0023] In some embodiments, the detection tube body is provided with a first gas inlet and a second gas inlet at two ends respectively, and the inside of the detection tube body is defined with a first detection channel communicated with the first gas inlet and a second detection channel communicated with the second gas inlet, and the first detection channel and the second detection channel are respectively provided with detection ports.
[0024] The utility model discloses a ventilation treatment equipment on the other side provides a kind of, including host computer, fan and the ventilation component described above are arranged in the host computer, the ventilation component is arranged in the downstream of host computer air inlet and the upstream of the fan.
[0025] In some embodiments, the ventilation component is wrapped with a sound-absorbing component.
[0026] Through the above technical solution, the ventilation component provided by the utility model can guide airflow flow and prolong airflow flow path by setting a curved airway inside, which can achieve the effect of airflow extension through three-dimensional folding in a smaller space, and can also block the transmission of fan noise, thereby achieving the purpose of stable flow and noise reduction.
[0027] The ventilation component of the utility model not only has simple structure and strong stability, but also improves the disadvantage of large volume of traditional noise reduction box for stable flow and noise reduction, optimizes the influence of fan noise on overall machine noise value to a certain extent, reduces product cost investment and improves user experience. The ventilation component of the utility model is particularly suitable for ventilation treatment equipment with small host computer volume.
[0028] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS
[0029] The drawings that constitute a part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its description are used to explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:
[0030] Figure 1 is the perspective view of one embodiment of the ventilation component in the utility model;
[0031] Figure 2 is Figure 1 is the perspective view of another angle of the ventilation component in the utility model;
[0032] Figure 3 is Figure 1 is the front view of the ventilation component in the utility model;
[0033] Figure 4 is Figure 3 is the sectional view of the ventilation component in the utility model;
[0034] Figure 5 yes Figure 3 Left view of the central ventilation component;
[0035] Figure 6 yes Figure 3 Right view of the central ventilation component;
[0036] Figure 7 This is a cross-sectional view of the main unit of the ventilation therapy device in this utility model.
[0037] Explanation of reference numerals in the attached figures
[0038] 10-Ventilation component, 11-Ventilation pipe body, 111-Air passage, 112-Air inlet, 113-Air outlet, 114-Air inlet end face, 115-Air outlet end face, 12-Detection pipe body, 121-First gas inlet, 122-Second gas inlet, 123-First detection channel, 124-Second detection channel, 125-Detection port, 13-First mounting plate, 14-Second mounting plate, 15-Slot, 20-Main unit, 21-Fan, 22-Main unit air inlet, 23-Main unit air outlet, 24-Flow detection component. Detailed Implementation
[0039] 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.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] This utility model provides a ventilation component for installation in a ventilation therapy device, see [link]. Figures 1-6 The ventilation component 10 includes a ventilation tube 11. The ventilation tube 11 has a curved airway 111 inside, which is used to extend the airflow path. The air inlet 112 (i.e., one end of the airway) of the airway 111 is connected to the main air inlet 22 of the ventilation therapy device. The air outlet 113 (i.e., the other end of the airway) of the airway 111 is connected to the air inlet of the fan 21 in the ventilation therapy device. In other words, the airway is located between the main air inlet 22 and the air inlet of the fan, and is connected to both of them respectively.
[0047] Preferably, the airway 111 is constructed as a spiral extending around the central axis of the ventilator body 11.
[0048] It should be noted that the airway 111, which extends spirally around the central axis of the ventilator 11, can be a regular spiral (e.g., the same pitch and the same spiral radius), such as a cylindrical spiral, or an irregular spiral (e.g., different pitches and / or different spiral radii), such as a conical spiral. Preferably, the airway 111 is a cylindrical spiral, and the spiral angle of the airway 111 is preferably greater than or equal to 45°, such as 45°, 90°, or 180°.
[0049] In other embodiments, the shape of the air passage 111 can also be configured as an S-shape, palindrome, or other curved structure, or an irregular curved structure. In this invention, the purpose of configuring the shape of the air passage 111 as curved is to extend the flow path of the airflow in the air passage 111. In the curved flow path, the airflow can be refracted and reflected during contact and collision with the inner wall surface of the curved air passage 111, thereby achieving the purpose of stabilizing flow and reducing noise.
[0050] When installing the ventilation component 10 into the ventilation therapy device, see Figure 7 The gas entering from the main air inlet 22 of the ventilation therapy device will enter the airway 111 through the air inlet 112, and flow smoothly and steadily along the long path of the airway 111. Finally, it will flow out through the air outlet 113 of the airway 111 and enter the fan 21. In addition, the noise generated by the operation of the fan 21 will enter the airway 111 in the opposite direction and collide with the inner wall of the airway 111. At this time, the refracted and reflected noise generated by the fan will be absorbed by the inner wall, thereby isolating the noise and preventing the noise from being output to the outside through the ventilation components.
[0051] The ventilation component provided by this utility model guides airflow and extends the airflow path by setting a curved air passage 111 inside it. On the one hand, it can achieve the effect of extending the air passage through three-dimensional folding in a small space, and on the other hand, it can block the transmission of fan noise, thereby achieving the purpose of stabilizing the flow and reducing noise.
[0052] The ventilation component of this invention is not only simple in structure and highly stable, but also overcomes the shortcomings of traditional noise reduction boxes used for flow stabilization and noise reduction, which are often too bulky. It optimizes the impact of fan noise on the overall noise level of the device to a certain extent, reduces product costs, and improves the user experience. This ventilation component is particularly suitable for ventilation therapy equipment, especially those with a smaller main unit.
[0053] In this invention, the cross-sectional area of the air passage 111 can be set to remain constant or vary. Preferably, the cross-sectional area of the air passage 111 is set to gradually decrease from the air inlet 112 to the air outlet 113. This funnel-shaped air passage structure can facilitate the absorption of fan noise by the inner wall of the air passage, improving the noise reduction effect. In addition, it is also beneficial for the ventilation component to be demolded during the manufacturing process.
[0054] In this invention, in order to further ensure the smooth flow of air through the air passage, the inner wall surface of the vent tube 11 used to define the air passage 111 can be made smooth.
[0055] In this invention, regarding the number of air passages, in some embodiments, the vent pipe 11 defines one air passage 111 inside. In this case, to ensure the effect of stable flow and noise reduction, and to reduce the air resistance bottleneck at the air inlet of the fan 21, the cross-sectional area of the air inlet 112 of the air passage 111 can be greater than or equal to the cross-sectional area of the air inlet of the fan 21. In other embodiments, see... Figures 1-6 The ventilation tube 11 contains multiple airways 111. In this case, to ensure stable flow and noise reduction, and to reduce the air resistance bottleneck at the air inlet of the fan 21, the total cross-sectional area of the air inlets 112 of the multiple airways 111 can be greater than or equal to the cross-sectional area of the air inlet of the fan 21. Alternatively, the cross-sectional area of the air inlet 112 of each of the multiple airways 111 can be greater than or equal to the cross-sectional area of the air inlet of the fan 21. The purpose of setting multiple airways 111 in the ventilation tube 11 is to allow the airflow at the air inlet end of the ventilation tube 11 to be dispersed into the ventilation tube 11 through multiple airways 111, where airflow rectification and airflow collision noise reduction processes occur respectively. Therefore, it has a better effect on stable flow and noise reduction. Thus, in the relatively confined space of the ventilation therapy equipment, the ventilation tube 11 with multiple airways 111 has a better effect than the ventilation tube 11 with a single airway 111. In addition, under the premise of achieving the same purpose of stabilizing flow and reducing noise, the length of the ventilation pipe 11 of the multi-channel 111 can be set to be shorter than that of the ventilation pipe 11 of the single-channel 111. Therefore, the overall size of the machine can be further reduced while achieving the same effect, which has good application value.
[0056] In this invention, when multiple airways 111 are defined inside the ventilator 11, the rotation direction or angle of the multiple airways 111 can be the same or different. In order to ensure that the ventilator has a small volume and that the airflow between the airways 111 does not cause disturbance or interference, it is preferable that the multiple airways 111 have the same rotation direction and angle, for example, a regular and uniform spiral structure.
[0057] In this utility model, see Figure 5 andFigure 6 Multiple air ducts 111 can be arranged in layers radially outward from the center of the ventilator 11. The cross-sectional areas of the air ducts 111 on the same cross-section between layers can be equal or unequal. The cross-sectional areas of the air ducts 111 on the same cross-section within each layer can also be equal or unequal. Preferably, the cross-sectional areas of the air ducts 111 on the same cross-section between layers are equal, and the cross-sectional areas of the air ducts 111 on the same cross-section within each layer are equal. The number and cross-sectional areas of the air ducts 111 can be determined based on the volume of the ventilator and the air intake cross-sectional area of the fan. In this preferred embodiment, the air passages 111 in the same layer have the same shape and size to avoid airflow interference between them. Specifically, the air passages in the same layer refer to the air passages having the same radial distance from their central axis to the central axis of the ventilation tube 11. The air passages 111 in different layers have the same shape but different sizes to achieve a certain effect of stabilizing the flow and reducing noise for airflow sound waves of different frequency bands. Specifically, the air passages in different layers refer to the air passages having different radial distances from their central axis to the central axis of the ventilation tube 11.
[0058] To ensure uniformity in airway cutting, the spacing between the air inlets 112 of adjacent airways 111 in each layer is equal, and the spacing between the air outlets 113 of adjacent airways 111 in each layer is also equal. This also helps to avoid turbulence.
[0059] In this utility model, see Figure 1 and Figure 2 The air inlet 112 and air outlet 113 of the air passage 111 are preferably circular in shape. In other embodiments, the air inlet 112 and air outlet 113 may also be elliptical, polygonal, or other shapes. An air inlet end face 114 and an air outlet end face 115 are formed at the axial ends of the vent pipe 11, respectively. The air inlet 112 of the air passage 111 is located on the air inlet end face 114, and the air outlet 113 of the air passage 111 is located on the air outlet end face 115. See also... Figure 1 , Figure 2 and Figure 4 Preferably, the inlet face 114 is formed as a spherical surface concave towards the center of the vent pipe 11 (i.e., towards the interior of the pipe), and the outlet face 115 is also formed as a spherical surface concave towards the center of the vent pipe 11 (i.e., towards the interior of the pipe). This creates notches at the inlet face 114 and the outlet face 115, which can also be called a ball-and-socket structure. The inlet notch formed at the inlet face 114 smoothly integrates the airflow before it enters the airway, allowing it to enter the airway smoothly. The airflow output from the airway is further integrated through the outlet notch, thus achieving better flow stability.
[0060] In this invention, to facilitate the manufacturing of the ventilation components, the wall thickness of the ventilation pipe 11, which defines the air passage 111, is set to be uniform. In this case, such as Figure 1 As shown, the outer wall surface of the ventilator 11 has grooves.
[0061] In this utility model, see Figure 1 and Figure 2 The ventilation component 10 may also include a detection tube 12, which is disposed on the radial side of the ventilation tube 11 and extends along the axial direction of the ventilation tube 11, for detecting the pressure difference between the two ends of the ventilation tube 11.
[0062] The ventilation tube 11 can be cylindrical, and the detection tube 12 can be elongated. In other embodiments, the ventilation tube 11 and the detection tube 12 can be integrated to form a cylindrical structure. Regarding the integration method, the detection tube 12 and the ventilation tube 11 can be integrally formed, meaning the ventilation component 10 is a single piece designed through integration; of course, the ventilation tube 11 and the detection tube 12 can also be configured as separate structures that can be detachably connected.
[0063] Specifically, such as Figure 4 As shown, the detection tube 12 has a first gas inlet 121 and a second gas inlet 122 at its two ends. The interior of the detection tube 12 defines a first detection channel 123 communicating with the first gas inlet 121 and a second detection channel 124 communicating with the second gas inlet 122. Detection ports 125 are respectively provided on the first detection channel 123 and the second detection channel 124. It should be noted that the first detection channel 123 and the second detection channel 124 are not connected. The first detection channel 123 is in airflow communication with the inlet end face 114, and the second detection channel 124 is in airflow communication with the outlet end face 115. By measuring the gas pressure in the first detection channel 123 and the second detection channel 124 from the two detection ports 125, the pressure difference between the inlet and outlet ends of the vent tube 11 can be obtained.
[0064] In this utility model, such as Figure 1 and Figure 2 As shown, the ventilation component 10 may further include a first mounting plate 13 and a second mounting plate 14. The first mounting plate 13 is mounted on the air inlet end of the ventilation component 10, and the second mounting plate 14 is mounted on the air outlet end of the ventilation component 10. By providing the first mounting plate 13 and the second mounting plate 14, it is convenient to install the ventilation component 10 inside the main unit 20 of the ventilation therapy device, and to ensure that both ends of the ventilation component 10 are connected to the air inlet 22 of the main unit and the air inlet of the fan 21 inside the main unit, respectively. Figure 7 As shown.
[0065] Among them, such as Figure 1 and Figure 2As shown, the first mounting plate 13 can be an annular plate surrounding the vent pipe 11 and the detection pipe 12. The venting component 10 can include two first mounting plates 13, which are parallel to and spaced apart along the axial direction of the vent pipe 11. A slot 15 for engaging with the internal structure of the main unit is formed between the two first mounting plates 13 (see...). Figure 3 and Figure 7 ).like Figure 1 and Figure 2 As shown, the second mounting plate 14 can be a plate surrounding the vent pipe 11 and the detection pipe 12, and the second mounting plate 14 can be snapped into the main unit.
[0066] In another aspect, this utility model provides a ventilation therapy device, including a main unit 20. A fan 21 and the aforementioned ventilation component 10 are disposed within the main unit 20. The ventilation component 10 is located downstream of the main unit's air inlet 22 and upstream of the fan 21, meaning that the ventilation component 10 is positioned within the main unit between the main unit's air inlet 22 and the fan. It should be noted that the main unit's air inlet 22 referred to in this utility model is the air inlet of the ventilation therapy device, through which the ventilation therapy device communicates with the external airflow.
[0067] Among them, such as Figure 7 As shown, a noise reduction box may not be installed inside the main unit 20. That is, the fan 21 is installed inside the main unit 20 without a noise reduction box, thus significantly reducing the size of the main unit. Simultaneously, the ventilation component 10 of this invention achieves noise reduction and improved airflow stability even with a smaller main unit size, thus possessing good application value and providing a better way to meet the needs of miniaturization and portability of ventilation therapy equipment. The main unit 20 has a main unit air inlet 22 and a main unit air outlet 23. Gas enters the main unit through the main unit air inlet 22, then flows sequentially through the ventilation component 10 and the fan 21 before being discharged from the main unit air outlet 23. A flow detection component 24 may also be installed inside the main unit 20. This flow detection component 24 is located at two detection ports 125 of the ventilation component to detect the flow rate, thereby obtaining the pressure difference across the ventilation tube.
[0068] In addition, sound-absorbing components, such as sound-absorbing cotton, can be wrapped around the outside of the ventilation component 10. This allows the sound-absorbing cotton material to absorb the sound noise of the airflow flowing inside the ventilation component 10 from the outside, preventing sound waves from propagating outward and further improving the noise reduction effect, while avoiding direct contact between the sound-absorbing cotton material and the airflow inside the ventilation component 10. Since direct contact between the sound-absorbing cotton material and the airflow inside the ventilation component 10 would cause the sound-absorbing cotton particles to be transported to the patient's end along with the airflow due to aging or quality problems, posing a safety hazard and affecting the patient's health, this noise reduction method of isolating the sound-absorbing cotton from the airflow achieves the purpose of noise reduction while ensuring the patient's respiratory health and safety, and has good application value.
[0069] The ventilation therapy equipment may be a ventilator or an oxygen therapy device, etc.
[0070] 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.
[0071] 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 ventilation component for installation in a ventilation therapy device, characterized in that, The ventilation component (10) includes a ventilation tube (11), the interior of which is defined by a curved airway (111) for extending the airflow path. The air inlet (112) of the airway (111) is connected to the main air inlet (22) of the ventilation therapy device, and the air outlet (113) of the airway (111) is connected to the air inlet of the fan (21) in the ventilation therapy device.
2. The ventilation component according to claim 1, characterized in that, The airway (111) is constructed as a spiral extending around the central axis of the ventilator (11).
3. The ventilation component according to claim 1, characterized in that, The cross-sectional area of the air passage (111) is set to gradually decrease from the air inlet (112) to the air outlet (113), and / or The inner wall surface of the airway (111) is made smooth.
4. The ventilation component according to claim 1, characterized in that, The ventilation pipe (11) internally defines an air passage (111), and the cross-sectional area of the air inlet (112) of the air passage (111) is greater than or equal to the cross-sectional area of the air inlet of the fan (21); or The ventilation pipe (11) has multiple air passages (111) defined inside, and the total cross-sectional area of the air inlets (112) of the multiple air passages (111) is greater than or equal to the cross-sectional area of the air inlet of the fan (21).
5. The ventilation component according to claim 1, characterized in that, The ventilation tube (11) defines a plurality of airways (111) inside.
6. The ventilation component according to claim 5, characterized in that, The spiral directions of the multiple airways (111) are the same.
7. The ventilation component according to claim 5, characterized in that, The plurality of airways (111) are arranged in layers radially outward from the center of the airway body (11).
8. The ventilation component according to claim 5, characterized in that, The cross-sectional areas of the airways (111) on the same cross section between layers are not equal, and / or The cross-sectional area of the air passages (111) on the same cross section of each layer is equal.
9. The ventilation component according to claim 5, characterized in that, The spacing between the air inlets (112) of adjacent air passages (111) in each layer is equal, and / or The spacing between the air outlets (113) of adjacent air passages (111) in each layer is equal.
10. The ventilation component according to claim 1, characterized in that, The air inlet (112) and air outlet (113) of the air passage (111) are both circular, and / or The vent pipe (11) has an air inlet end face (114) and an air outlet end face (115) formed at its two axial ends. The air inlet (112) of the air passage (111) is located on the air inlet end face (114), and the air outlet (113) of the air passage (111) is located on the air outlet end face (115).
11. The ventilation component according to claim 10, characterized in that, The air inlet end face (114) is formed as a spherical surface concave towards the interior of the vent pipe body (11), and / or The air outlet end face (115) is formed as a spherical surface that is recessed toward the interior of the vent pipe (11).
12. The ventilation component according to any one of claims 1-11, characterized in that, The wall thickness of the ventilation tube (11) used to define the airway (111) is set to be uniform, and / or The ventilation component (10) includes a detection tube (12), which is disposed on the radial side of the ventilation tube (11) and extends along the axial direction of the ventilation tube (11) for detecting the pressure difference between the two ends of the ventilation tube (11).
13. The ventilation component according to claim 12, characterized in that, The detection tube (12) is provided with a first gas inlet (121) and a second gas inlet (122) at both ends. The inside of the detection tube (12) is defined by a first detection channel (123) communicating with the first gas inlet (121) and a second detection channel (124) communicating with the second gas inlet (122). The first detection channel (123) and the second detection channel (124) are respectively provided with detection ports (125).
14. A ventilation therapy device, characterized in that, Includes a main unit (20), wherein a fan (21) and a ventilation component according to any one of claims 1-13 are provided in the main unit (20), and the ventilation component (10) is provided downstream of the air inlet (22) of the main unit and upstream of the fan (21).
15. The ventilation therapy device according to claim 14, characterized in that, The ventilation component (10) is covered with a sound-absorbing component.