Breathing machine host module and breathing machine

Abstract

The invention discloses a breathing machine main machine module and a breathing machine, the main machine module comprises a shell and a fan arranged in the shell, an air inlet duct communicated with an air inlet of the fan and an air outlet duct communicated with an air outlet of the fan are arranged in the shell, and the main machine module further comprises a supporting piece arranged in the shell; the supporting piece is of a structure made of flexible materials, at least part of the draught fan is located in the supporting piece, and the supporting piece and the shell are matched to form at least part of the area of the air inlet duct. A cavity is formed below the fan and surrounds the periphery of at least part of the area of the fan; and the air inlet duct is communicated with the cavity or surrounds part of the periphery of the cavity. The flexible materials not only can be tightly attached, but also can better adapt to tiny deformation or installation errors of all connecting parts. The air flow in the air inlet channel can directly or indirectly carry out air cooling heat dissipation on the fan and the cavity, and the temperature rise of the fan and the supporting piece is effectively relieved.

Description

Technical Field

[0001] The present application belongs to the technical field of medical equipment, and specifically relates to a ventilator host module and a ventilator. Background Art

[0002] A ventilator generally includes a main unit and a humidifier tank, wherein a blower and an air inlet are provided inside the main unit. After air enters the main unit from the outside, it is pressurized by the blower and then discharged from the main unit. The humidifier tank contains a certain amount of water and is connected to the air outlet of the main unit. The air that enters the humidifier tank after being pressurized by the blower obtains humidity through contact with water and the heating system of the heating device before entering the patient interface.

[0003] In the host, in addition to the blower, an air intake path is often formed by a shell or other components. After the outside air enters the host, it enters the inside of the blower through the air intake path. However, in the prior art, the components that form the air intake path are usually hard structures, such as plastics. During assembly, the air path of this structure has rigid contact between the components, which is greatly affected by factors such as processing errors and installation errors. Once the installation is deviated, the host cannot be assembled normally, or there is a risk of air leakage. In addition, during the operation of the ventilator, the pressure in the air intake path often changes, which will often impact the inner walls of the air intake path. Under high pressure fluctuations (such as high-pressure oxygen delivery or patient coughing), over time, the position of a certain component may be offset or even burst, resulting in gas leakage. In addition, the replacement and maintenance of each component is relatively difficult. Once the air path is damaged, it will cause permanent damage and can only be replaced with a new machine.

[0004] In addition, when the airflow flows or turns in the air intake path, it will collide violently with the inside of the air intake path, which will generate a lot of noise. On the other hand, when the blower is working, it may cause the components that make up the air path to resonate, further increasing the noise or affecting the stability of the system. During transportation or accidental collisions, the components are also prone to breakage due to mechanical impact, which affects the yield rate.

[0005] If flexible materials are simply used to replace the original hard materials to form the air intake path, although it can improve the wrapping effect of the blower, thereby reducing shock and noise in the air duct, the heat dissipation performance of the flexible material is poor, resulting in the heat of the blower cannot be dissipated in time. On the one hand, long-term use will affect the safety of the blower. On the other hand, high temperature may cause the flexible material to deform, affecting the flow efficiency of the airflow in the air intake path, and may also cause the temperature of the gas to rise, affecting the user's comfort when inhaling. Summary of the invention

[0006] The present application provides a ventilator host module and a ventilator, so as to solve the problem of high noise, inconvenient assembly and large vibration caused by the traditional hard material enclosing the air intake path, and to solve the problem of inconvenient heat dissipation of the ventilator host and heat accumulation at the blower.

[0007] The technical solution adopted in this application is:

[0008] A ventilator host module comprises a shell and a fan disposed in the shell, wherein the shell has an air inlet duct connected to the air inlet of the fan and an air outlet duct connected to the air outlet of the fan, the host module also comprises a support member disposed in the shell, the support member is a structure made of a flexible material, at least part of the fan is located in the support member, the support member cooperates with the shell to form at least part of the area of ​​the air inlet duct; a cavity is provided below the fan, the cavity surrounds the periphery of at least part of the area of ​​the fan; the air inlet duct is connected to the cavity or the air inlet duct surrounds part of the periphery of the cavity.

[0009] The support member has an installation cavity inside, which includes a first cavity and a second cavity located below the first cavity. The fan includes a main body and a driving part. An air inlet is provided on the side of the main body facing away from the driving part. The main body is located in the first cavity, and the driving part extends into the second cavity. The cavity is located below and on the outer peripheral side of the driving part.

[0010] The air inlet duct comprises an arc segment formed between the outer wall of the second chamber and the outer shell, and the arc segment extends along the circumference of the fan.

[0011] The bottom wall of the second chamber is provided with a shock-absorbing protrusion protruding upward, the protruding height of the shock-absorbing protrusion is H1, and the distance between the bottom wall of the driving part and the bottom wall of the second chamber is H2, wherein H1<H2.

[0012] The bottom wall of the second chamber is provided with a positioning protrusion, and the positioning protrusion forms a positioning groove that can be matched with the end of the driving part.

[0013] The support member has an installation cavity inside, which includes a first chamber. The fan includes a main body and a driving part. An air inlet is provided on the side of the main body facing away from the driving part. The main body is located in the first chamber, and an opening is provided on the bottom wall of the first chamber for the driving part to extend out. The cavity is located outside the support member, and the cavity is located below the driving part and surrounds the outer peripheral side of the driving part, and the air inlet duct is connected to the cavity.

[0014] The air inlet duct includes an arc segment extending along the circumference of the fan. The air inlet duct also includes an air guide channel connected to the arc segment and the air inlet respectively to guide the airflow in the arc segment to the air inlet.

[0015] A diverter rib is arranged in the arc segment, which divides the arc segment into a first wind passing area close to the fan side and a second wind passing area away from the fan side. At least part of the fan is located in the first wind passing area, and the airflow in the first wind passing area flows along at least part of the circumference of the driving part.

[0016] The diverter ribs extend to the air guiding channel; or, the diverter ribs extend to the outer edge of the driving part.

[0017] The shell is provided with matching convex ribs, which surround an installation position for installing the support member. The outer periphery of the support member is provided with a folded edge, which is hung on the matching convex ribs.

[0018] One of the housing and the support is provided with a positioning rib, and the other is provided with a plug-in slot for plugging and matching with the positioning rib, and at least a partial area of ​​the positioning rib extends along the circumference of the fan.

[0019] The support member is provided with a supporting rib protruding upward and used to support the fan to form a cavity below the fan; the supporting ribs are multiple and arranged at intervals along the circumference of the fan; or, the supporting ribs are annular and extend along the circumference of the fan.

[0020] The support member has an installation cavity inside, which includes a first chamber. The fan includes a main body and a driving part. An air inlet is provided on the side of the main body away from the driving part. The main body is located in the first chamber, and the supporting ribs are arranged on the bottom wall of the first chamber to abut against the main body.

[0021] A noise reduction component is also provided in the air inlet duct, and the noise reduction component is provided with a protruding and / or recessed diameter-changing portion, so that the air inlet duct has at least one diameter-changing section in the air flow direction.

[0022] The air inlet duct includes an arc segment and an air guide channel, the arc segment extends in a horizontal plane to surround the fan, and the air guide channel extends vertically to guide the airflow in the arc segment to the air inlet of the fan; the host module also includes an upper cover, the upper cover covers the support member, and the upper cover has a guide rib on the side facing the fan, and the guide rib extends from the outlet of the air guide channel to the air inlet of the fan.

[0023] The shell is provided with an air inlet, which is communicated with the arc section through a connecting pipe. The connecting pipe has an inlet and an outlet, and the connecting pipe is bent and extended so that the inlet and the outlet are axially misaligned.

[0024] A flow detection component is arranged in the air inlet duct, and a guide rib is arranged upstream of the flow detection component in the air inlet duct to divide the air flow into multiple streams and enter the flow detection component.

[0025] An air outlet cavity is also provided inside the shell, and the air outlet cavity is communicated with the air outlet of the fan, and the flow cross-sectional area of ​​the air outlet cavity is larger than the cross-sectional area of ​​the air outlet of the fan.

[0026] The present application also discloses a ventilator, including the above-mentioned host module and a humidification tank, the outer shell has a accommodating cavity, at least a part of the humidification tank is located in the accommodating cavity, the humidification tank has a humidification inlet and a humidification outlet, and the air outlet of the fan is connected to the humidification inlet.

[0027] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0028] 1. In the present application, at least part of the fan is contained inside the support, and the support cooperates with the shell to form at least part of the air inlet duct, and the support is a flexible material, so that at least part of the air inlet duct is a flexible structure. The flexible materials can not only fit closely, but also better adapt to the slight deformation or installation error of each connecting component, and reduce the risk of air leakage caused by the rigid contact of hard materials. Moreover, during the operation of the ventilator, the flexible air duct structure can be slightly deformed with the pressure change to maintain the air path sealing and avoid gas leakage. Externally, the flexible support can also better resist the impact of buffering external forces. During transportation or accidental collision, the flexible air path is not easy to break, reducing the risk of damage caused by mechanical impact. Internally, the flexible support has better pressure adaptability. Under high pressure fluctuations (such as high pressure oxygen delivery or patient coughing), the flexible material can disperse the pressure by deformation and reduce the risk of bursting. In addition, the flexible support also has good chemical stability, and is more tolerant to humid environments and disinfectants (such as alcohol and chlorine-containing disinfectants), avoiding possible corrosion problems of metals or hard plastics. Under extreme pressure, the flexible support may be deformed or detached first (such as designed as a safety redundant structure), reducing the risk of excessive air pressure being directly transmitted to the patient's airway. In addition, the contact between the airflow and the support is also softer, generating less impact force. The support can also effectively buffer the vibration generated by internal fans and other components, reduce equipment operating noise, and reduce interference to patients.

[0029] In addition, the support has a cavity below the fan (the driving part of the fan), and the cavity surrounds the periphery of at least a partial area of ​​the fan, and the air inlet duct is connected to the cavity or surrounds the periphery of the cavity, so that during the air intake process, the airflow can directly enter the cavity, contact the fan and thus take away the heat of the fan, or contact the wall of the cavity, that is, the support, and take away the heat of the support, thereby directly or indirectly cooling the fan and the cavity, effectively alleviating the temperature rise of the fan and the support, maintaining the safety of the fan working environment, as well as the structure and position stability of the support, and improving the system stability and the comfort of the user inhaling the airflow.

[0030] 2. As a preferred embodiment of the present application, the support member has an installation cavity inside, the installation cavity includes a first cavity and a second cavity located below the first cavity, the bottom wall of the second cavity is provided with a shock-absorbing protrusion protruding upward, the protruding height of the shock-absorbing protrusion is H1, and the distance between the bottom wall of the driving part and the bottom wall of the second cavity is H2, wherein H1<H2. The driving part of the fan is located in the second cavity, and the shock-absorbing protrusion is located below the driving part. After assembly, the lower side of the driving part and the shock-absorbing protrusion are not in contact, so that the fan is in a suspended state relative to the bottom wall of the second cavity, and then when the fan is working, on the one hand, it can prevent the driving part from directly transmitting vibration to the wall of the second cavity, and on the other hand, it can improve the heat dissipation of the driving part and reduce the heat transmitted to the wall of the second cavity. When the fan vibrates with a large amplitude, the driving part will intermittently contact with the shock-absorbing protrusion, and then the vibration amplitude of the fan is quickly reduced by the buffering of the shock-absorbing protrusion, thereby achieving shock absorption of the fan in a specific environment.

[0031] 3. As a preferred embodiment of the present application, a diverter rib is provided in the arc segment, and the diverter rib divides the arc segment into a first wind passing area close to the fan side and a second wind passing area away from the fan side. The fan is located in the first wind passing area, and the airflow in the first wind passing area flows along at least part of the circumference of the driving part. The airflow in the arc segment is divided into two streams by the diverter rib, one of which enters the first wind passing area and the other enters the second wind passing area, wherein the first wind passing area extends along the circumference of the fan and the driving part is located in the first wind passing area, so that the airflow in the first wind passing area will directly contact the driving part during the flow process to take away part of the heat of the driving part, thereby improving the heat dissipation effect of the driving part. At the same time, the airflow flows along the circumference of the driving part, which also increases the contact time between the airflow and the driving part, so that the airflow can fully contact the driving part, thereby extending the heat exchange time and cooling the driving part more effectively.

[0032] 4. As a preferred embodiment of the present application, a noise reduction member is further provided in the air inlet duct, and the noise reduction member is provided with a protruding and / or recessed diameter reducing portion, so that the air inlet duct has at least one diameter reducing section in the air flow direction. The air inlet duct has at least one diameter reducing section in the air flow path, which makes the air inlet duct more tortuous, thereby extending the path for noise transmission, increasing the difficulty of noise transmission to the outside, and helping to weaken the noise in the air inlet duct and improve the user experience. At the same time, since the support member is made of a flexible material, when the air flow collides with it, the support member will undergo a local slight deformation, thereby making the inner wall of the air inlet duct more tortuous, further improving the noise reduction effect.

[0033] 5. As a preferred embodiment of the present application, an air outlet cavity is also provided inside the housing, and the air outlet cavity is connected to the air outlet of the fan, and the flow cross-sectional area of ​​the air outlet cavity is greater than the cross-sectional area of ​​the air outlet of the fan. After the airflow flows out from the fan, it enters the air outlet cavity. Since the flow cross-sectional area of ​​the air outlet cavity is greater than the cross-sectional area of ​​the air outlet of the fan, the air pressure of the airflow is reduced. In this process, not only the pressure of the airflow is reduced, but also the flow rate of the airflow is slowed down, and the noise generated by the flow of the airflow can be effectively reduced, and the whistling sound emitted during the high-speed flow of the airflow can be reduced. It is helpful to realize the silent design of the ventilator and improve the patient's use experience. Moreover, after the airflow flows out from the host module, it also needs to enter the humidification tank for humidification, and the humidification liquid such as water is stored in the humidification tank. Through the decompression of the air outlet cavity, the airflow can also be more gently contacted with the humidification liquid when entering the humidification tank, ensuring the humidification effect, while effectively reducing noise, avoiding the high-speed airflow impacting the liquid to cause the liquid to splash and cause liquid leakage, or emitting a violent liquid rolling noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0035] Figure 1 This is a schematic diagram of the structure of a ventilator in one embodiment of the present application;

[0036] Figure 2 A cross-sectional view of a ventilator according to an embodiment of the present application;

[0037] Figure 3 for Figure 2 Magnified view of area A in the middle;

[0038] Figure 4 A cross-sectional view of a host module according to an embodiment of the present application;

[0039] Figure 5 A cross-sectional view of a ventilator according to an embodiment of the present application;

[0040] Figure 6 A cross-sectional view of a portion of a host module in one embodiment of the present application;

[0041] Figure 7 A cross-sectional view of a partial area of ​​a host module in another embodiment of the present application;

[0042] Figure 8 A cross-sectional view of a portion of a host module in another embodiment of the present application;

[0043] Fig. 9A cross-sectional view of a portion of a host module in another embodiment of the present application;

[0044] Fig.10 An exploded view of a partial structure of a host module according to an embodiment of the present application;

[0045] Fig.11 A cross-sectional view of a support member and a fan in one embodiment of the present application;

[0046] Fig.12 A cross-sectional view of a support member and a fan in another embodiment of the present application;

[0047] Fig.13 This is a schematic diagram of the structure of a flow detection component in one implementation mode of the present application;

[0048] Fig.14 A cross-sectional view of a flow detection element according to an embodiment of the present application;

[0049] Fig.15 A rear view of a flow detection component according to an embodiment of the present application;

[0050] Fig.16 A rear view of a flow detection component according to another embodiment of the present application;

[0051] Fig.17 A cross-sectional view of a flow detection component according to an embodiment of the present application.

[0052] in:

[0053] 1 host module; 11 shell; 111 upper shell; 112 lower shell; 113 matching convex rib; 12 upper cover; 121 guide convex rib; 13 air inlet duct; 131 arc segment; 132 guide rib; 133 diversion rib; 134 first air passing area; 135 second air passing area; 14 air outlet cavity; 141 docking channel; 15 air guide channel; 151 air guide duct; 16 air inlet; 17 connecting pipe; 18 plug-in slot;

[0054] 2 humidification tank;

[0055] 3 support member; 31 cavity; 32 folded edge; 33 first chamber; 331 supporting rib; 332 opening; 333 annular rib; 34 second chamber; 341 shock-absorbing protrusion; 342 positioning protrusion; 343 positioning groove; 35 positioning rib;

[0056] 4 fan; 41 air inlet; 42 main body; 43 driving part; 44 air outlet;

[0057] 5. Noise reduction parts;

[0058] 6 flow detection member; 61 shell; 62 air inlet section; 621 guide transition surface; 63 air outlet section; 64 detection port; 65 detection tube; 66 air resistance structure; 67 ventilation grille part; 671 first air outlet; 68 flow part; 681 second air outlet; 682 separation rib; 69 first shell wall. DETAILED DESCRIPTION

[0059] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0061] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0064] like Figure 2 , Figure 4 As shown, a ventilator host module 1 includes a shell 11 and a fan 4 placed in the shell 11, the shell 11 has an air inlet duct 13 connected to the air inlet 41 of the fan 4, and an air outlet duct connected to the air outlet 44 of the fan 4, the host module 1 also includes a support member 3 placed in the shell 11, the support member 3 is a structure made of flexible material, at least part of the fan 4 is located inside the support member 3, the support member 3 and the shell 11 cooperate to form at least a partial area of ​​the air inlet duct 13; a cavity 31 is provided below the fan 4, and the cavity 31 surrounds the periphery of at least a partial area of ​​the fan 4; the air inlet duct 13 is connected to the cavity 31 or the air inlet duct 13 surrounds part of the periphery of the cavity 31.

[0065] In the present application, at least part of the fan 4 is contained inside the support member 3, and the support member 3 cooperates with the housing 11 to form at least part of the area of ​​the air inlet duct 13, and the support member 3 is a flexible material, so that at least part of the area of ​​the air inlet duct 13 is a flexible structure. The flexible materials can not only fit tightly, but also better adapt to the slight deformation or installation error of each connecting component, and reduce the risk of air leakage caused by the rigid contact of hard materials. Moreover, during the operation of the ventilator, the flexible air duct structure can be slightly deformed with the pressure change, maintain the air path sealing, and avoid gas leakage. Externally, the flexible support member 3 can also better resist the impact of buffering external forces. During transportation or accidental collision, the flexible air path is not easy to break, reducing the risk of damage caused by mechanical impact. Internally, the flexible support member 3 has better pressure adaptability. Under high pressure fluctuations (such as high-pressure oxygen delivery or patient coughing), the flexible material can disperse the pressure through deformation and reduce the risk of bursting. In addition, the flexible support 3 also has good chemical stability, and is more tolerant to humid environments and disinfectants (such as alcohol and chlorine-containing disinfectants), avoiding possible corrosion problems of metals or hard plastics. Under extreme pressure, the flexible support 3 may be deformed or disengaged first (such as designed as a safety redundant structure), reducing the risk of excessive air pressure being directly transmitted to the patient's airway. Not only that, the contact between the airflow and the support 3 is also softer, and the impact force generated is smaller. The support 3 can also effectively buffer the vibration generated by the internal fan 4 and other components, reduce the operating noise of the equipment, and reduce interference with the patient.

[0066] In addition, the support member 3 has a cavity 31 below the fan 4 (the driving part 43 of the fan 4), and the cavity 31 at least surrounds the outer periphery of a partial area of ​​the fan 4. The air inlet duct 13 is connected to the cavity 31 or surrounds the outer periphery of the cavity 31, so that during the air intake process, the airflow can directly enter the cavity 31, contact the fan 4 and thus take away the heat of the fan 4, or contact the wall of the cavity 31, that is, the support member 3, and take away the heat of the support member 3, so that the fan 4 and the cavity 31 can be directly or indirectly cooled by air, effectively alleviating the temperature rise of the fan 4 and the support member 3, maintaining the safety of the working environment of the fan 4, as well as the structural and positional stability of the support member 3, and improving the system stability and the comfort of the user inhaling the airflow.

[0067] Specifically, Figure 2 , Figure 4 , Fig.11 , Fig.12 As shown, the support member 3 has an installation cavity inside, at least part of the fan 4 is located in the installation cavity, and the outside of the support member 3 forms an air inlet duct 13. The present application does not limit the specific material of the support member 3. Preferably, the support member 3 is made of silicone. Of course, it can also be made of other materials, such as cotton, etc., which is not limited here.

[0068] The present application does not limit the formation method of the cavity 31. Figure 2 As shown, the housing 11 includes a lower housing 112 and an upper housing 111 located above the lower housing 112. The upper housing 111 and the lower housing 112 are spliced ​​up and down to form a cavity for accommodating the support member 3 and the fan 4. The fan 4 can be fixed to the upper housing 111 so that the fan 4 is suspended relative to the support member 3, thereby forming a cavity 31 below the fan 4 and between the lower housing 112 or the support member 3. As a preferred embodiment, Figure 4 , Fig. 9 As shown, a supporting rib 331 protruding upward and used to support the fan 4 is arranged inside the support member 3 to form a cavity 31 below the fan 4.

[0069] By arranging supporting ribs 331 inside the support member 3 to support the fan 4, not only the fan 4 is raised a certain distance compared to the support member 3, thereby forming a cavity 31 below, but also the supporting stability of the fan 4 is improved, which can reduce the shaking and vibration generated during the operation of the fan 4.

[0070] This embodiment does not limit the structure of the supporting rib 331. In one embodiment, Figure 4 , Fig. 9As shown, there are multiple supporting ribs 331 and they are arranged at intervals along the circumference of the fan 4. Specifically, the supporting ribs 331 can be a convex point structure, or multiple sections of discontinuous arc-shaped ribs extending along the circumference of the fan 4, and a connecting gap is formed between two adjacent sections of supporting ribs 331, so that the chambers on the upper and lower sides of the supporting ribs 331 can be connected, so that the heat of the upper fan 4 can flow into the lower cavity 31 and be cooled and dissipated by the airflow.

[0071] In another embodiment, the support rib 331 is annular and extends along the circumference of the fan 4. The support rib 331 is a complete annular structure, which can provide uniform and stable support to each circumferential area of ​​the fan 4, thereby improving the support stability of the fan 4.

[0072] Furthermore, if Figure 2 , Figure 4 , Fig.11 , Fig.12 As shown, the support member 3 has an installation cavity inside, and the installation cavity includes a first chamber 33. The fan 4 includes a main body 42 and a driving part 43. An air inlet 41 is provided on the side of the main body 42 away from the driving part 43. The main body 42 is located in the first chamber 33. The supporting rib 331 is arranged on the bottom wall of the first chamber 33 to abut against the main body 42.

[0073] Specifically, Figure 2 , Figure 4 As shown, the cavity 31 is located below the driving part 43 and surrounds the outer peripheral side of the driving part 43. The driving part 43 is a motor. When the fan 4 is working, the heat at the driving part 43 is higher and more concentrated. Therefore, the cavity 31 is surrounded outside the driving part 43 to dissipate heat for the fan 4 more efficiently. In one embodiment, there is also a gap between the outer peripheral side of the main body 42 and the inner wall of the first chamber 33, and the gap can be designed to be connected with the lower cavity 31, so that the heat dissipation effect of the main body 42 is also improved.

[0074] like Fig. 9 , Fig.12 As shown, the bottom wall of the first chamber 33 is provided with a step surface, and the supporting rib 331 is provided on the step surface so that the supporting rib 331 supports the main body 42 , and the driving part 43 extends out of the first chamber 33 from the bottom wall of the first chamber 33 .

[0075] As a preferred implementation of the present application, Figure 2 , Figure 4 , Fig. 9 , Fig.12As shown, the support member 3 has an installation cavity inside, and the installation cavity includes a first chamber 33 and a second chamber 34 located below the first chamber 33. The fan 4 includes a main body 42 and a driving part 43. An air inlet 41 is provided on the side of the main body 42 away from the driving part 43. The main body 42 is located in the first chamber 33, and the driving part 43 extends into the second chamber 34. The cavity 31 is located below and on the outer peripheral side of the driving part 43.

[0076] Specifically, Figure 2 , Fig.12 As shown, the axis of the fan 4 is arranged vertically, the main body 42 is located at the top, the air inlet 41 is located on the top surface of the main body 42, and the driving part 43 is located below the main body 42. The main body 42 is located in the first chamber 33, and the driving part 43 is located in the second chamber 34, so that the fan 4 is completely located in the installation cavity of the support member 3. In this embodiment, a cavity 31 is formed between the fan 4 and the support member 3, and the cavity 31 is at least located on the lower side of the driving part 43 and the outer peripheral side of the driving part 43, and the support member 3 isolates the cavity 31 from the air inlet duct 13 on the outside. The airflow cannot reach the inside of the support member 3, that is, the cavity 31, and the air inlet duct 13 surrounds the outer peripheral side of the second chamber 34, so that the air inside the second chamber 34 and the driving part 43 are cooled by contacting the outer wall of the second chamber 34. In addition, in this embodiment, the fan 4 is suspended in the support member 3, which can reduce the contact and friction between the fan and the inner wall of the support member 3 due to vibration when the fan is working, thereby greatly reducing noise and significantly improving the quietness effect of the ventilator.

[0077] Preferably, if Figure 5 As shown, the air inlet duct 13 includes an arc segment 131 formed between the outer wall of the second chamber 34 and the outer shell 11 , and the arc segment 131 extends along the circumference of the fan 4 .

[0078] The arc segment 131 surrounds at least part of the second chamber 34, which not only lengthens the length of the air inlet duct 13 within the limited space inside the housing 11, so that the airflow can be fully rectified before entering the fan 4, but also lengthens the path for noise to be transmitted, thereby achieving a noise reduction effect. In addition, during the air intake process, the contact time between the airflow and the wall of the second chamber 34 is also extended, so that the two can fully exchange heat and improve the heat dissipation effect.

[0079] In a preferred embodiment of this embodiment, Figure 4 , Fig.12 As shown, the bottom wall of the second chamber 34 is provided with a shock absorbing protrusion 341 protruding upward, the protruding height of the shock absorbing protrusion 341 is H1, and the distance between the bottom wall of the driving part 43 and the bottom wall of the second chamber 34 is H2, wherein H1<H2.

[0080] The driving part 43 of the fan 4 is located in the second chamber 34, and the shock absorbing protrusion 341 is located below the driving part 43. After assembly, the lower side of the driving part 43 does not contact the shock absorbing protrusion 341, so that the fan 4 is suspended relative to the bottom wall of the second chamber 34. When the fan 4 is working, on the one hand, it can prevent the driving part 43 from directly transmitting vibration to the wall of the second chamber 34 to reduce noise, and on the other hand, it can improve the heat dissipation of the driving part 43 and reduce the heat transmitted to the wall of the second chamber 34. When the fan 4 vibrates with a large amplitude, the driving part 43 will intermittently contact the shock absorbing protrusion 341, and then the vibration amplitude of the fan 4 is quickly reduced through the buffering of the shock absorbing protrusion 341, thereby achieving shock absorption of the fan 4 under specific conditions.

[0081] Preferably, the top of the shock-absorbing protrusion 341 has a contact tip or a contact arc surface, and contacts the driving part 43 via the contact tip or the contact arc surface.

[0082] In one embodiment, if Fig.12 As shown, a positioning protrusion 342 is protruding from the bottom wall of the second chamber 34 , and the positioning protrusion 342 forms a positioning groove 343 that can cooperate with the end of the driving part 43 .

[0083] The positioning protrusion 342 forms a positioning groove 343 on the bottom wall of the second chamber 34. When installing the fan 4, the bottom end of the driving part 43 can be aligned with the positioning groove 343 to form an installation positioning for the fan 4, ensuring that the fan 4 is placed in the center of the installation cavity. When the fan falls due to the fall of the ventilator or other extreme conditions, the positioning groove 343 can limit the bottom end of the driving part 43 and thus play a protective role. Specifically, the bottom end of the driving part 43 has a motor shaft, and the motor shaft cooperates with the positioning groove 343. The outer wall of the motor shaft and / or the inner wall of the positioning groove 343 have a guide slope.

[0084] Specifically, the positioning protrusion 342 and the shock absorbing protrusion 341 can be a complete and uninterrupted annular rib, or can be a plurality of arc-shaped ribs extending along the circumference of the driving part 43, or can be a convex point structure arranged at intervals along the circumference of the driving part 43, which is not limited here. Fig.12 As shown, in one embodiment, the shock absorbing protrusion 341 is arranged concentrically with the positioning protrusion 342, and the shock absorbing protrusion 341 is located outside the positioning protrusion 342. Of course, the positioning protrusion 342 can also be located outside the shock absorbing protrusion 341. Preferably, the protruding height of the positioning protrusion 342 is less than the protruding height of the shock absorbing protrusion 341.

[0085] As another preferred embodiment of the present application, Figure 6 , Fig.11As shown, the support member 3 has an installation cavity inside, and the installation cavity includes a first chamber 33. The fan 4 includes a main body 42 and a driving part 43. An air inlet 41 is provided on the side of the main body 42 away from the driving part 43. The main body 42 is located in the first chamber 33, and an opening 332 is provided on the bottom wall of the first chamber 33 for the driving part 43 to extend out. The cavity 31 is located outside the support member 3, and the cavity 31 is located below the driving part 43 and surrounds the outer peripheral side of the driving part 43. The air inlet duct 13 is connected to the cavity 31.

[0086] In this embodiment, the support member 3 has a first chamber 33 for accommodating the main body 42, and the driving part 43 extends out of the support member 3 through the opening 332 of the bottom wall of the first chamber 33, that is, the driving part 43 is located in the air inlet duct 13, so that a cavity 31 is formed between the bottom and the outer peripheral side of the driving part 43 and the shell 11, and the cavity 31 is also a part of the air inlet duct 13. When the ventilator is working, the airflow in the air inlet duct 13 can directly contact the driving part 43 to cool it. Preferably, the opening 332 is provided with an annular rib 333 to abut and seal with the main body 42 to achieve the sealing of the air inlet duct 13 and the first chamber 33.

[0087] Preferably, if Figure 7 , Figure 8 As shown, the air inlet duct 13 includes an arc segment 131, which extends along the circumference of the fan 4, and the air inlet duct 13 also includes an air guide channel 15, which is connected to the arc segment 131 and the air inlet 41 respectively, so as to guide the airflow in the arc segment 131 to the air inlet 41. The arc segment 131 extending in an arc shape can also prolong the contact time between the airflow and the driving part 43, thereby improving the heat exchange effect between the airflow and the driving part 43.

[0088] Furthermore, if Figure 7 , Figure 8 As shown, a diverter rib 133 is provided in the arc segment 131, and the diverter rib 133 divides the arc segment 131 into a first wind passing area 134 close to the fan 4 and a second wind passing area 135 away from the fan 4. The fan 4 is located in the first wind passing area 134, and the airflow in the first wind passing area 134 flows along at least part of the circumference of the driving part 43.

[0089] The airflow in the arc segment 131 is divided into two streams by the diverter rib 133, one of which enters the first wind passing area 134, and the other enters the second wind passing area 135, wherein the first wind passing area 134 extends along the circumference of the fan 4 and the drive part 43 is located in the first wind passing area 134, so that the airflow in the first wind passing area 134 will directly contact the drive part 43 during the flow process to take away part of the heat of the drive part 43, thereby improving the heat dissipation effect of the drive part 43. At the same time, the airflow flows along the circumference of the drive part 43, which also increases the contact time between the airflow and the drive part 43, so that the airflow can fully contact the drive part 43, thereby extending the heat exchange time and more effectively cooling the drive part 43.

[0090] Specifically, in one embodiment, Figure 7 As shown, the diverter rib 133 extends to the air guide channel 15. Figure 7 As shown, the diverter rib 133 extends to the wind guide channel 15, so that the fan 4 is completely located in the first wind passing area 134. Then, when the airflow in the first wind passing area 134 flows to the fan 4, it will be diverted again under the influence of the fan 4. One part flows clockwise from the circumference of the fan 4, and the other part flows counterclockwise from the circumference of the fan 4, so that it can flow through the fan 4 completely for one circle and contact the fan 4 completely, greatly improving the heat dissipation effect. After the two airflows meet on the other side of the fan 4, they enter the wind guide channel 15. The airflow in the second wind passing area 135 will not contact the fan 4, so the temperature of this part of the airflow is relatively low. The airflow in the first wind passing area 134 exchanges heat with the fan 4 and has a higher temperature. After the two airflows meet, the heat is neutralized, so that the temperature of the entire airflow will not rise excessively, thereby improving the comfort of the user when using it.

[0091] Specifically, Figure 7 As shown, the first wind passing area 134 is larger than the second wind passing area 135 , so that after the airflow is diverted by the diverter rib 133 , more airflow can enter the first wind passing area 134 for dissipating the heat of the fan 4 .

[0092] In another embodiment, if Figure 8 As shown, the diverter rib 133 extends to the outer edge of the driving portion 43. Figure 8 As shown, the diverter rib 133 extends to the edge of the fan 4, so that the fan 4 and the diverter rib 133 jointly divert the airflow. At this time, the fan 4 is partially located in the first wind passing area 134 and partially located in the second wind passing area 135. After the airflow in the first wind passing area 134 contacts the fan 4, it flows a certain distance in the same direction (clockwise or counterclockwise) of the circumference of the fan 4. The airflow in the second wind passing area 135 can also contact the fan 4 to dissipate the heat of the fan 4. The two airflows converge at the air guide channel 15.

[0093] Preferably, if Figure 2 , Figure 3 , Fig. 9 As shown, the housing 11 has a matching convex rib 113 , which encloses a mounting position for mounting the support member 3 . The outer periphery of the support member 3 is provided with a folded edge 32 , which is hung on the matching convex rib 113 .

[0094] Specifically, Figure 2 , Figure 3 As shown, the shell 11 includes an upper shell 111 and a lower shell 112, and a mating rib 113 is arranged on the lower shell 112 and extends upward to enclose a chamber for accommodating the support member 3. The support member 3 is located in the chamber, and the end of the folded edge 32 is folded downward so as to be able to rest on the upper edge of the mating rib 113. The host module 1 also includes an upper cover 12. After the upper shell 111 and the lower shell 112 are fixed, the upper cover 12 presses the folded edge 32 from above, so that the mating rib 113 and the upper cover 12 clamp the folded edge 32 up and down to fix the support member 3.

[0095] Furthermore, if Figure 7 As shown, one of the housing 11 and the support member 3 is provided with a positioning rib 35 , and the other is provided with a plug-in groove 18 for plugging with the positioning rib 35 , and at least a portion of the positioning rib 35 extends along the circumference of the fan 4 .

[0096] Preferably, the bottom wall of the support member 3 is provided with a downwardly protruding positioning rib 35, and the positioning groove 343 is provided on the bottom wall of the housing 11, and the plug-in fit of the two can play a positioning role for the support member 3. At the same time, the folded edge 32 at the top of the support member 3 is positioned and matched with the matching convex rib 113, and the bottom is positioned and matched through the positioning rib 35 and the plug-in groove 18, so that the upper and lower sides of the support member 3 are positioned. For the flexible support member 3, the increase in the positioning position further improves the convenience of installation, and prevents the support member 3 from being squeezed and deformed, resulting in deviation in the installation position.

[0097] Of course, the support member 3 may be provided with the insertion groove 18 , and the housing 11 may be provided with the positioning rib 35 correspondingly, which is not limited here.

[0098] Preferably, the positioning rib 35 has a first extension end extending circumferentially along the fan 4, and a second extension section extending radially along the fan 4, so that after it cooperates with the plug-in slot 18, it can play a circumferential limiting role on the support member 3 to ensure that the installation direction of the support member 3 is unique and will not rotate.

[0099] As a preferred implementation of the present application, Figure 2 , Figure 5 , Fig. 9As shown, the air inlet duct 13 includes an arc segment 131 and an air guide channel 15, the arc segment 131 extends in a horizontal plane to surround the fan 4, and the air guide channel 15 extends vertically to guide the airflow in the arc segment 131 to the air inlet 41 of the fan 4; the host module 1 also includes an upper cover 12, the upper cover 12 covers the support member 3, and the upper cover 12 has a guide rib 121 on the side facing the fan 4, and the guide rib 121 extends from the outlet of the air guide channel 15 to the air inlet 41 of the fan 4.

[0100] Specifically, Figure 2 , Figure 6 , Fig.11 , Fig.12 As shown, the housing 11 includes an upper shell 111 and a lower shell 112, which are spliced ​​up and down to form a cavity for accommodating the fan 4 and the air inlet duct 13, and an arc segment 131 is formed between the support member 3 and the lower shell 112, so that the arc segment 131 is located at the lower layer of the air inlet duct 13, and the air guide channel 15 extends vertically to guide the airflow in the arc segment 131 to between the upper cover 12 and the support member 3 in the upper shell 111, that is, the upper layer of the air inlet duct 13. Specifically, the support member 3 is provided with a vertically extending air guide duct, and the air guide channel 15 is located inside the air guide duct. The air guide duct is provided with a horizontally (radially toward the center of the fan 4) bent outlet section at the top outlet to guide the airflow inside it to flow horizontally toward the air inlet 41 of the fan 4. The guide ribs 121 can comb the airflow flowing out of the air guide channel 15, so that the airflow flows along the extension direction of the guide ribs 121 toward the air inlet 41 at the center of the fan 4, thereby improving the air intake efficiency and allowing the airflow to enter the fan 4 more orderly, avoiding turbulence of the airflow under the suction force of the fan 4.

[0101] Furthermore, if Figure 7 , Figure 8 , Fig.10 As shown, the housing 11 is provided with an air inlet 16, which is connected to the arc segment 131 through a connecting pipe 17. The connecting pipe 17 has an inlet and an outlet, and the connecting pipe 17 is bent and extended so that the inlet and the outlet are axially misaligned. The connecting pipe 17 is a medium for the air inlet duct 13 to communicate with the outside world, and is also the main way for the noise in the air inlet duct 13 to be transmitted outward. The bent and extended connecting pipe 17 makes the airflow path inside more tortuous, and the noise transmission path is also more tortuous, which is more conducive to the collision of noise in the connecting pipe 17, thereby reducing the intensity of sound waves and improving the noise reduction effect of the whole machine.

[0102] Specifically, Figure 7 As shown, the connecting pipe 17 is an S-shaped structure. Of course, it can be an inclined pipe structure with an inlet and an outlet staggered or other structures, which is not limited here.

[0103] Preferably, if Figure 2 , Fig. 9 , Fig.10 As shown, a noise reduction member 5 is further provided in the air inlet duct 13, and the noise reduction member 5 is provided with a protruding and / or recessed diameter-changing portion, so that the air inlet duct 13 has at least one diameter-changing section in the air flow direction.

[0104] The air inlet duct 13 has at least one diameter-changing section on the air flow path, making the air inlet duct 13 more tortuous, thereby extending the path for noise to be transmitted, increasing the difficulty of noise being transmitted to the outside, and helping to reduce the noise in the air inlet duct 13 and improve the user experience. At the same time, since the support member 3 is made of a flexible material, when the air flow collides with it, the support member 3 will be slightly deformed locally, thereby making the inner wall of the air inlet duct 13 more tortuous, further improving the noise reduction effect.

[0105] Preferably, the noise reduction member 5 is a flexible structure. Figure 2 , Fig. 9 , Fig.10 As shown, the housing 11 includes an upper shell 111 and a lower shell 112. The support member 3 is partially sunken to form an installation cavity for accommodating the fan 4. The support member 3 is placed in the lower shell 112. The host module 1 also includes an upper cover 12, which covers the installation cavity from above.

[0106] The outer wall of the support member 3 and the side wall of the lower shell 112 constitute the side walls on the inner and outer sides of the lower air duct of the air inlet duct 13. The noise reduction member 5 is arranged between the support member 3 and the lower shell 112, and one noise reduction member 5 is located at the bottom of the air inlet duct 13, and one noise reduction member 5 is located at the top of the air inlet duct 13 to constitute the upper wall and lower wall of the air inlet duct 13. At the same time, at least one noise reduction member 5 is also arranged between the upper cover 12 and the support member 3, so that the upper cover 12, the noise reduction member 5 and the fan 4 together constitute the upper air duct of the air inlet duct 13, wherein the noise reduction member 5 has a notch extending radially from the outlet of the self-winding channel 15 along the fan 4 to the air inlet 41.

[0107] Specifically, the side of the noise reduction component 5 facing the air inlet duct 13 can be set to an uneven structure, so that the air inlet duct 13 extends in a wavy or zigzag shape.

[0108] Of course, in another embodiment, the noise reduction component 5 can also be sound-absorbing cotton or other noise reduction structures filled into the air inlet duct 13, such as porous materials, perforated plate structures, etc. By filling different numbers of noise reduction components 5 at different positions of the air inlet duct 13, the flow cross-sectional area of ​​different areas of the air inlet duct 13 can be changed.

[0109] Of course, a combination of the above two embodiments may also be adopted, that is, a noise reduction component 5 is provided in the air inlet duct 13 to constitute a partial channel wall of the air inlet duct 13, and a certain number of noise reduction components 5 are filled in the air inlet duct 13 to form a specific shape of the air inlet duct 13, which is not limited here.

[0110] As a preferred implementation of the present application, Figure 5 , Figure 7 , Figure 8 As shown, a flow detection member 6 is provided in the air inlet duct 13, and a guide rib 132 is provided upstream of the flow detection member 6 to divide the air flow into multiple streams and enter the flow detection member 6. The guide rib 132 can comb the air flow entering the flow detection member 6, so that the air flow enters the flow detection member 6 in a more orderly manner, and ensure the laminar state of the air flow, thereby improving the detection accuracy.

[0111] Preferably, if Fig.13 , Fig.14 As shown, the flow detection component 6 includes a shell 61, the shell 61 has an air flow channel inside, and an air blocking structure 66 is arranged inside the air flow channel to divide the air flow channel into an air inlet section 62 located on one side of the air blocking structure 66, and an air outlet section 63 located on the other side of the air blocking structure 66. The air blocking structure 66 is provided with a ventilation grille portion 67 at least in the middle area of ​​the air flow channel to connect the air inlet section 62 and the air outlet section 63. The shell 61 is provided with a detection port 64 corresponding to the air inlet section 62, and is provided with a detection tube 65 extending into the interior of the air outlet section 63 corresponding to the air outlet section 63. The end of the detection tube 65 extends to the ventilation grille portion 67 to detect the air flow passing through the ventilation grille portion 67.

[0112] The flow detection component 6 detects the flow rate of the air flow by detecting the air pressure difference between the air inlet section 62 and the air outlet section 63 of the air flow channel. The air resistance structure 66 located between the air inlet section 62 and the air outlet section 63 is provided with a ventilation grille portion 67 in the middle of the air flow channel. The ventilation grille portion 67 is divided into a plurality of air flow openings arranged in an array. When the air flow passes through, it will be divided into multiple streams, which can reduce the flow rate of the air flow. Moreover, the reduction in the flow area also makes the ventilation grille portion 67 constitute a laminar flow element, which can ensure the stability of the air flow state, so that the air flow passes through the detection tube 65 in the air outlet section 63 in a laminar state, thereby ensuring the detection accuracy.

[0113] In addition, the detection tube 65 located in the air outlet section 63 extends into the interior of the air flow channel so that the end is located at the ventilation grille portion 67. Since the ventilation grille portion 67 is located in the middle area of ​​the air flow channel, the detection tube 65 can not only bypass the viscous area near the channel wall and directly detect the airflow in the central area of ​​the air flow channel, but this part of the airflow is also subdivided and combed by the ventilation grille portion 67, thereby making the detection signal stronger and further improving the detection accuracy.

[0114] As a preferred embodiment, Fig.15 , Fig.16 As shown, the ventilation grille portion 67 has a plurality of first air holes 671 , and the air blocking structure 66 further includes a flow portion 68 , which has second air holes 681 , and the flow cross-sectional area of ​​the first air holes 671 is smaller than that of the second air holes 681 .

[0115] The first air hole with a small diameter on the ventilation grille 67 can subdivide the airflow in the air inlet section 62 into multiple strands, thereby improving the detection accuracy. However, if the air inlet section 62 and the air outlet section 63 are connected only through the first air hole 671 on the ventilation grille 67, the airflow will encounter greater resistance when passing through the air blocking structure 66, resulting in a greater pressure drop of the entire machine and a more serious pressure loss, which makes the air intake efficiency of the ventilator low. At the same time, since the airflow encounters greater resistance at the air blocking structure 66, a large amount of airflow converges in the air inlet section 62, the air pressure increases, and a greater noise is emitted, affecting the user experience. In the present application, the air-blocking structure 66 is also provided with a flow portion 68, which is provided with a second air port 681 and the flow cross-sectional area of ​​the second air port 681 is larger than the flow cross-sectional area of ​​the first air port 671, so that part of the airflow in the air intake section 62 passes through the first air port 671 to be detected by the detection tube 65, and part of the airflow passes through the second air port 681 to enter the air outlet section 63. The airflow encounters less resistance when passing through the second air port 681, so it can reduce the air pressure in the air intake section 62, which helps to reduce noise and pressure loss. While ensuring the detection accuracy, the airflow can pass through the air-blocking structure 66 more efficiently, thereby ensuring the air intake efficiency of the whole machine.

[0116] The shape of the first air openings 671 may be rectangular, circular, triangular, honeycomb or other shapes, and the arrangement of the first air openings 671 may be an array or other arrangements, which are not limited herein.

[0117] like Fig.15 , Fig.16 As shown, in a preferred embodiment, there are multiple second air ports 681, and there are separation ribs 682 between the multiple second air ports 681. The separation ribs 682 are used to form multiple second air ports 681 in the flow portion 68, which ensures the air flow efficiency and effectively controls the air pressure in the air inlet section 62. At the same time, the flow portion 68 can also play a certain role in subdividing and combing the air flow, thereby further reducing the probability of turbulence in the air outlet section 63, especially near the channel wall.

[0118] Furthermore, if Fig.17 As shown, in the air flow direction, the width of the dividing rib 682 gradually increases, so that the flow cross-sectional area of ​​the inlet end of the second air port 681 is larger than the flow cross-sectional area of ​​the outlet end of the second air port 681 .

[0119] The second air port 681 is a structure with a large inlet and a small outlet. The large inlet end can make the airflow in the air inlet section 62 pass more easily, and can reduce the air resistance of the air intake, so that the airflow can quickly and smoothly pass through the air resistance structure 66 to enter the air outlet section 63, improve the overall flow efficiency of the airflow and the air intake efficiency of the whole machine, and help reduce the noise emitted when the airflow is blocked, thereby improving the noise reduction effect. The small outlet end can also subdivide and comb the airflow passing through the flow section, so that the airflow is subdivided into multiple strands through the second air port 681, thereby reducing the probability of turbulence or viscosity in the air outlet section 63, so that the airflow in the airflow channel as a whole flows in a laminar state as much as possible.

[0120] In a preferred embodiment, Fig.15 , Fig.16 As shown, the shell 61 has a first shell wall 69, the detection tube 65 is arranged on the first shell wall 69, the air blocking structure 66 has a proximal end close to the first shell wall 69, and a distal end away from the first shell wall 69, and the ventilation grille portion 67 is located in the central area of ​​the air blocking structure 66; or, the ventilation grille portion 67 extends from the central area of ​​the air blocking structure 66 to the distal end.

[0121] Preferably, if Fig.17 As shown, the air inlet section 62 has an air inlet end and an air outlet end, and the flow cross-sectional area of ​​the air inlet end is larger than the flow cross-sectional area of ​​the air outlet end, so as to form a flow guide transition surface on the inner wall of the air inlet section 62 .

[0122] The air inlet end is a flared structure, which increases the flow cross-sectional area, can collect airflow in a larger range, and make the airflow in the air inlet duct 13 pass through the flow detection device as much as possible, thereby improving the detection accuracy. The flow cross-sectional area of ​​the air outlet end is small, so that the airflow in the air inlet section 62 can be converged, so that it passes through the air resistance structure 66 more concentratedly, and is detected on the front and back sides of the air resistance structure 66, which can improve the strength of the detection signal and the detection accuracy. The flow-guiding transition surface makes the process of the airflow in the air inlet section 62 from being more dispersed to gradually converging softer and smoother, ensuring the flow efficiency of the airflow, reducing pressure loss, and avoiding the airflow from turning sharply to generate noise.

[0123] like Fig.17 As shown, the flow-guiding transition surface is a flow-guiding cambered surface. The flow-guiding surface with a cambered surface structure, on the one hand, makes the airflow guided more gently and smoothly, so that the airflow turns gradually without abruptly, thereby avoiding the generation of turbulence and reducing the noise caused by the turning of the airflow. On the other hand, at least part of the air inlet duct 13 is an annular air duct extending along the circumference of the fan 4 assembly, so the flow-guiding cambered surface is more in line with the extension direction of the air inlet duct 13, so that the airflow in the air inlet duct 13 can enter the flow detection device more smoothly.

[0124] Preferably, if Figure 2 , Figure 5 , Figure 6 , Fig. 9 As shown, an air outlet cavity 14 is further provided inside the housing 11 , and the air outlet cavity 14 is connected to the air outlet 44 of the fan 4 , and the flow cross-sectional area of ​​the air outlet cavity 14 is larger than the cross-sectional area of ​​the air outlet 44 of the fan 4 .

[0125] After the airflow flows out from the fan 4, it enters the air outlet cavity 14. Since the flow cross-sectional area of ​​the air outlet cavity 14 is greater than the cross-sectional area of ​​the air outlet 44 of the fan 4, the air pressure of the airflow is reduced. In this process, not only the pressure of the airflow is reduced, but also the flow rate of the airflow is slowed down, and the noise generated by the flow of the airflow can be effectively reduced, and the whistling sound emitted during the high-speed flow of the airflow can be reduced. It is helpful to realize the silent design of the ventilator and improve the user experience of the patient. Moreover, after the airflow flows out from the host module 1, it also needs to enter the humidification tank 2 for humidification, and the humidification liquid such as water is stored in the humidification tank 2. Through the decompression of the air outlet cavity 14, the airflow can also be made to contact the humidification liquid more gently when entering the humidification tank 2, while ensuring the humidification effect, it can also effectively reduce noise, avoid the high-speed airflow impacting the liquid to cause the liquid to splash and cause liquid leakage, or emit a violent liquid rolling noise.

[0126] Specifically, Figure 6 As shown, the host module 1 is further provided with a docking channel 141 communicating with the air outlet cavity 14 , and the docking channel 141 is used for docking and communicating with the air inlet pipe of the humidification tank 2 .

[0127] like Figure 1 As shown, the present application also discloses a ventilator, including the above-mentioned host module 1, and a humidification tank 2, the shell 11 has a accommodating cavity, at least a part of the humidification tank 2 is located in the accommodating cavity, the humidification tank 2 has a humidification inlet and a humidification outlet, and the air outlet 44 of the fan 4 is connected to the humidification inlet.

[0128] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0129] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0130] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A ventilator host module, comprising a housing and a fan disposed in the housing, wherein the housing has an air inlet duct connected to an air inlet of the fan and an air outlet duct connected to an air outlet of the fan, wherein: The host module further includes a support member disposed inside the housing, the support member is a structure made of a flexible material, at least a portion of the fan is located inside the support member, and the support member cooperates with the housing to form at least a portion of the air inlet duct; A cavity is provided below the fan, and the cavity surrounds the periphery of at least a portion of the fan; the air inlet duct is connected to the cavity or the air inlet duct surrounds a portion of the periphery of the cavity.

2. The ventilator host module according to claim 1, characterized in that: The support member has an installation cavity inside, and the installation cavity includes a first cavity and a second cavity located below the first cavity. The fan includes a main body and a driving part. An air inlet is provided on the side of the main body away from the driving part. The main body is located in the first cavity, and the driving part extends into the second cavity. The cavity is located below and on the outer peripheral side of the driving part.

3. The ventilator host module according to claim 2, characterized in that: The air inlet duct includes an arc segment formed between the outer wall of the second chamber and the outer shell, and the arc segment extends along the circumference of the fan.

4. The ventilator host module according to claim 2, characterized in that: The bottom wall of the second chamber is provided with a shock-absorbing protrusion protruding upward, the protruding height of the shock-absorbing protrusion is H1, and the distance between the bottom wall of the driving part and the bottom wall of the second chamber is H2, wherein H1<H2.

5. The ventilator host module according to claim 2, characterized in that: The bottom wall of the second chamber is provided with a positioning protrusion, and the positioning protrusion forms a positioning groove capable of matching with the end of the driving part.

6. The ventilator host module according to claim 1, characterized in that: The support member has an installation cavity inside, the installation cavity includes a first cavity, the fan includes a main body and a driving part, an air inlet is provided on a side of the main body away from the driving part, the main body is located in the first cavity, and an opening is provided on the bottom wall of the first cavity for the driving part to extend out; The cavity is located outside the support member, the cavity is located below the driving part and surrounds the outer peripheral side of the driving part, and the air inlet duct is communicated with the cavity.

7. The ventilator host module according to claim 6, characterized in that: The air inlet duct includes an arc segment, which extends along the circumference of the fan. The air inlet duct also includes an air guide channel, which is connected to the arc segment and the air inlet respectively to guide the airflow in the arc segment to the air inlet.

8. The ventilator host module according to claim 7, characterized in that: A diverter rib is provided in the arc segment, and the diverter rib divides the arc segment into a first wind passing area close to one side of the fan and a second wind passing area away from one side of the fan. At least part of the fan is located in the first wind passing area, and the airflow in the first wind passing area flows along at least part of the circumference of the driving part.

9. The ventilator host module according to claim 8, characterized in that: The diverter rib extends to the air guide channel; or, the diverter rib extends to the outer edge of the driving part.

10. The ventilator host module according to claim 1, characterized in that: The shell has a matching convex rib, and the matching convex rib surrounds a mounting position for mounting the support member. The outer periphery of the support member is provided with a folded edge, and the folded edge is hung on the matching convex rib.

11. The ventilator host module according to claim 1, characterized in that: One of the shell and the support is provided with a positioning rib, and the other is provided with a plug-in groove for plugging and cooperating with the positioning rib, and at least a partial area of ​​the positioning rib extends along the circumference of the fan.

12. The ventilator host module according to claim 1, characterized in that: The support member is provided with a supporting rib protruding upwards and used to support the fan to form the cavity below the fan; The supporting ribs are multiple and arranged at intervals along the circumference of the fan; or, The supporting rib is annular and extends along the circumference of the fan.

13. The ventilator host module according to claim 12, characterized in that: The support member has an installation cavity inside, and the installation cavity includes a first cavity. The fan includes a main body and a driving part. An air inlet is provided on the side of the main body away from the driving part. The main body is located in the first cavity, and the supporting rib is arranged on the bottom wall of the first cavity to abut against the main body.

14. The ventilator host module according to claim 1, characterized in that: A noise reduction component is also provided in the air inlet duct, and the noise reduction component is provided with a protruding and / or recessed diameter-changing portion, so that the air inlet duct has at least one diameter-changing section in the air flow direction.

15. The ventilator host module according to claim 1, characterized in that: The air inlet duct includes an arc segment and an air guide channel, the arc segment extends in a horizontal plane to surround the fan, and the air guide channel extends vertically to guide the airflow in the arc segment to the air inlet of the fan; The host module further comprises an upper cover, the upper cover covers the support member, and a side of the upper cover facing the fan has a guide rib, the guide rib extends from the outlet of the air guide channel to the air inlet of the fan.

16. The ventilator host module according to claim 15, characterized in that: The shell is provided with an air intake port, which is communicated with the arc segment through a connecting pipe. The connecting pipe has an inlet and an outlet. The connecting pipe is bent and extended so that the inlet and the outlet are axially misaligned.

17. The ventilator host module according to claim 1, characterized in that: A flow detection component is arranged in the air inlet duct, and a guide rib is arranged upstream of the flow detection component in the air inlet duct so that the air flow is divided into multiple streams and enters the flow detection component.

18. The ventilator host module according to claim 1, characterized in that: An air outlet cavity is also provided inside the shell, and the air outlet cavity is communicated with the air outlet of the fan, and the flow cross-sectional area of ​​the air outlet cavity is larger than the cross-sectional area of ​​the air outlet of the fan.

19. A ventilator, characterized in that: It includes the host module described in any one of claims 1-18, and a humidification tank, the shell has a containing cavity, at least a part of the area of ​​the humidification tank is located in the containing cavity, the humidification tank has a humidification inlet and a humidification outlet, and the air outlet of the fan is connected to the humidification inlet.

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