Air duct module

Abstract

This utility model relates to a duct module, comprising an outer shell forming a hollow cavity and a first air inlet and a first air outlet disposed on the outer shell; and a fan assembly disposed within the hollow cavity, comprising a fan body, a fan sleeve fitted around the outer periphery of the fan body, and a connecting component disposed on the fan sleeve, wherein the fan sleeve divides the hollow cavity into a first cavity and a second cavity that are not interconnected, and the connecting component connects the first cavity and the second cavity; and a microporous cover disposed within the second cavity and covering the fan sleeve, having a plurality of guide holes; external air can sequentially pass through the first air inlet, the first cavity, the connecting component, the second cavity, and the microporous cover to enter the fan assembly, and finally be discharged from the first air outlet. This utility model, by placing the microporous cover within the second cavity, can improve the operating efficiency and stability of the fan, increase space utilization, thereby reducing the overall size of the duct module and lowering production costs.

Description

Technical Field

[0001] This utility model relates to the field of home ventilator technology, and in particular to an air duct module. Background Technology

[0002] Continuous positive airway pressure (CPAP) is a non-invasive ventilation device that maintains airway patency by providing a continuous positive airflow throughout the respiratory cycle. It is widely used to treat sleep apnea syndrome, improve lung function, and assist in postoperative rehabilitation.

[0003] Since ventilators are typically used at night, noise can disturb the sleep of patients and their roommates. To reduce the noise generated during operation, existing technologies often optimize the structure of the airflow module. For example, Chinese patent (CN118462661A) reduces aerodynamic noise by setting up multiple chambers, extending the airway, and designing a large-angle bend in the airway. Another example is Chinese patent (CN222368151U), which uses a resonant plate and the inner wall of the shell to form a resonant cavity, and fills the resonant cavity with sound-absorbing material, combining resonant cavity resonance silencing with sound-absorbing material sound absorption to reduce noise.

[0004] However, while these noise reduction technologies significantly improve device comfort and user experience, they also present certain challenges to the miniaturization design of the air duct module structure. For example, increasing the number of chambers and extending the air path may increase the size of the air duct module, while the use of resonant cavities and sound-absorbing materials will also increase the complexity and overall size of the air duct module.

[0005] Therefore, there is an urgent need to design a duct module that balances noise reduction and device miniaturization. Utility Model Content

[0006] Based on this, the purpose of this utility model is to overcome the defects or deficiencies of the prior art and provide a duct module.

[0007] A duct module includes a housing assembly, comprising an outer shell and a first air inlet and a first air outlet disposed on the outer shell; the outer shell encloses a hollow cavity; and a fan assembly disposed within the housing assembly, comprising a fan body, a fan sleeve fitted around the outer periphery of the fan body, and a connecting component disposed on the fan sleeve, the fan sleeve dividing the hollow cavity into a first cavity and a second cavity that are not interconnected, the connecting component connecting the first cavity and the second cavity to form an air duct; and a microporous cover disposed within the second cavity and covering the fan sleeve, the microporous cover having a plurality of guide holes; external air can sequentially pass through the first air inlet, the first cavity, the connecting component, the second cavity, and the microporous cover to enter the fan assembly, and finally be discharged from the first air outlet.

[0008] Compared with the prior art, the air duct module of this utility model sets a microporous cover in the second cavity, which can not only evenly disperse the airflow entering the fan body and avoid the airflow concentrating and impacting the fan blades, thereby improving the operating efficiency and stability of the fan, but also increase the space utilization rate, thereby reducing the overall size of the air duct module and reducing the production cost.

[0009] In one embodiment, the guide hole may be a circular hole or a polygonal hole.

[0010] In one embodiment, the microporous cover may be composed of multiple plates or integrally formed.

[0011] In one embodiment, the connecting component is a connecting pipe, with one end of the connecting pipe disposed in a first cavity and the other end disposed in a second cavity.

[0012] In one embodiment, a guide tube disposed in the first cavity is further included, one end of which is connected to the first air inlet, and the other end of which is a free end communicating with the first cavity.

[0013] In one embodiment, the guide tube is made of a material with good softness and elasticity, such as silicone.

[0014] In one embodiment, a pressure sensor group is further included, comprising a first pressure sensor for collecting the output pressure of the gas, a second pressure sensor for collecting the gas pressure in a first cavity, and a third pressure sensor for collecting the gas pressure in a second cavity; the first pressure sensor is disposed on the fan outlet of the fan body; the second and third pressure sensors are disposed on the first housing.

[0015] In one embodiment, the outer casing includes a first housing and a second housing covering the first housing. The first air inlet is disposed on the first housing. The first housing and the second housing are connected to form a hollow cavity. The first cavity is enclosed by the fan sleeve and the first housing, and the second cavity is enclosed by the fan sleeve and the second housing.

[0016] In one embodiment, the first housing further includes a groove serving as a chamber for mixing different gases.

[0017] In one embodiment, the fan body includes a fan and a fan guide pipe surrounding the fan. The fan guide pipe includes a fan inlet and a fan outlet. External gas can sequentially enter the first cavity through the first inlet, enter the second cavity through the connecting component, then pass through the microporous cover, flow through the gap between the fan body and the fan sleeve, enter the fan inlet, and then sequentially flow along the fan guide pipe and the fan outlet, finally being discharged through the first outlet. The fan inlet is located below the fan body, and the fan outlet is located on the side of the fan body.

[0018] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the air duct module of this utility model;

[0020] Figure 2 This is an exploded structural diagram of the air duct module of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the fan body of this utility model;

[0022] Figure 4 This is a schematic diagram of the structure of the microporous cover of this utility model;

[0023] Figure 5 for Figure 1 A cross-sectional structural diagram of the air duct module in the AA direction;

[0024] Figure 6 for Figure 1 A schematic diagram of the airflow direction in the cross section of the duct module in the AA direction. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] like Figures 1 to 2 As shown, the present invention provides an air duct module, comprising:

[0027] The housing assembly 100, and the microporous cover 300 and the fan assembly 200 are disposed inside the housing assembly 100 and stacked from top to bottom;

[0028] The housing assembly 100 includes a first housing 110, a second housing 120 covering the first housing 110, a first air inlet 130, and a first air outlet 140; the first housing 110 and the second housing 120 are connected to form a hollow cavity 150.

[0029] The fan assembly 200 includes a fan body 210, a fan sleeve 220, and a connecting component 230;

[0030] The fan sleeve 220 is sleeved around the outer periphery of the fan body 210 and cooperates with the first housing 110 and the second housing 120 to divide the hollow cavity 150 into a first cavity 151 and a second cavity 152 that are not interconnected.

[0031] The connecting component 230 is disposed on the fan sleeve 220 and is used to connect the first cavity 151 and the second cavity 152 to form an air duct;

[0032] The microporous cover 300 is installed above the fan assembly 200, and the microporous cover 300 is provided with a plurality of flow guide holes 300A;

[0033] External air enters the fan assembly 200 through the first air inlet 130, the first cavity 151, the connecting component 230, the second cavity 152, and the microporous cover 300, and then flows out through the first air outlet 140.

[0034] Specifically, the housing assembly 100 includes a first housing 110, a second housing 120 covering the first housing 110, a first air inlet 130 and a first air outlet 140 disposed on the first housing 110; the first housing 110 and the second housing 120 are connected to form a hollow cavity 150.

[0035] Specifically, such as Figure 3 As shown, the fan body 210 includes a fan 211 and a fan guide pipe 212 surrounding the fan 211. The fan guide pipe 212 includes a fan inlet 213 and a fan outlet 214. Under the action of the fan 211, the external gas enters the first cavity 151 through the first inlet 130, enters the second cavity 152 through the connecting component 230, then passes through the microporous cover 300, flows through the gap between the fan body 210 and the fan sleeve 220, enters the fan inlet 213, and then flows along the fan guide pipe 212 and the fan outlet 214 in sequence, and finally is discharged through the first outlet 140.

[0036] In order to more effectively reduce eddy noise, the fan sleeve 220 is made of materials with good softness and elasticity, such as silicone.

[0037] In this embodiment, as Figure 3As shown, the fan inlet 213 is located below the fan body 210, and the fan outlet 214 is located on the side of the fan body 210. The external airflow first flows from the second cavity 152 down through the gap between the fan body 210 and the fan sleeve 220, and then enters the fan inlet 213. Subsequently, under the action of the fan 211, it flows through the fan guide pipe 212 and flows out from the fan outlet 214. This airflow path achieves efficient cooling and heat dissipation management of the fan body 210.

[0038] The connecting component 230 consists of several connecting pipes, one end of which is disposed in the second cavity 152 and the other end of which is disposed in the first cavity 151, for connecting the second cavity 152 and the first cavity 151.

[0039] Specifically, the cross-section of the connecting pipe can be circular or polygonal, and its cross-sectional shape is not limited in this application; the connecting pipe can be a straight pipe or a bent pipe, and is not limited in this application; and the length of the connecting pipe is less than the height of the first cavity 151 and the second cavity 152, and in this embodiment, the connecting pipe is a circular straight pipe.

[0040] Specifically, such as Figure 4 As shown, the microporous cover 300 is provided with a plurality of flow guide holes 300A. The microporous cover 300 is disposed inside the second cavity 152 and covers the fan sleeve 220. The microporous cover 300 divides the second cavity 152 into a first chamber 152A and a second chamber 152B. The first chamber 152A is the chamber formed by the microporous cover 300 and the first housing 110, and the second chamber 152B is the chamber formed by the microporous cover 300 and the fan sleeve 220. Specifically, the fan body 210 is disposed inside the second chamber 152B.

[0041] The guide hole 300A can be a circular hole, a polygonal hole, etc., and its shape is not limited in this application; and the hole diameter and hole density of the guide hole 300A are determined according to the factors affecting the air flow rate in actual operation, such as the power of the fan body 210, etc., and its specific hole diameter and hole density are not limited in this application; the microporous cover 300 is composed of multiple plates, or it can be composed of a single plate, and its plate composition method and number are not limited in this application.

[0042] In this embodiment, the flow guide hole 300A is a circular hole and is evenly distributed on the integrally formed microporous cover 300.

[0043] In order to make the airflow enter the air duct more smoothly and avoid the airflow generating severe turbulence and eddies at the inlet, the air duct module also includes a guide tube 400 disposed in the first cavity 151, one end of which is connected to the first air inlet 130, and the other end of which is a free end connected to the first cavity 151.

[0044] Furthermore, in order to more effectively reduce eddy noise, the guide tube 400 is made of a material with good softness and elasticity, such as silicone.

[0045] In addition, in order to monitor the gas pressure and flow rate output by the duct module in real time, the duct module also includes a pressure sensor group. The pressure sensor group includes a first pressure sensor (not shown) for collecting the output gas pressure, a second pressure sensor (not shown) for collecting the gas pressure in the second cavity 152, and a third pressure sensor (not shown) for collecting the gas pressure in the first cavity 151. The first pressure sensor is installed on the fan outlet 214 of the fan body 210. The second and third pressure sensors are installed on the first housing 110. Specifically, the third sensor penetrates the fan sleeve 220 to monitor the gas pressure in the first cavity 151. The output gas flow rate can be obtained by calculating the pressure difference between the second cavity 152 and the first cavity 151.

[0046] Furthermore, since different gases need to be input into the air duct module according to the requirements, the first housing 110 also includes a groove 110A for mixing gases, and the groove 110A is connected through to the first air inlet 130.

[0047] like Figures 5 to 6 As shown, the workflow is as follows: When the air duct module structure is working, different gases are mixed in the mixing chamber and then enter the guide tube 400 from the first air inlet 130. Subsequently, they flow through the first cavity 151, the connecting component 230, the first chamber 152A, the microporous cover 300, the second chamber 152B, the fan inlet 213, and the fan outlet 214, and finally flow out of the air duct module from the first air outlet 140, which is connected to the fan outlet 214.

[0048] Compared to existing technologies, the inherent structure of commonly used fan bodies dictates that a certain space must exist between the fan body and the first housing. This invention places a microporous cover within the second cavity, which not only evenly disperses the airflow entering the fan body, preventing concentrated airflow from impacting the fan blades and thus improving the fan's operating efficiency and stability, but also increases space utilization, thereby reducing the overall size of the duct module and lowering production costs. Furthermore, this invention uses a groove on the first housing as a mixing chamber for different gases, further reducing the overall size of the duct module. Simultaneously, this invention employs a long guide tube to ensure a smoother airflow into the duct, preventing severe turbulence and eddies at the inlet.

[0049] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of this application. The singular forms “a,” “the,” and “the” used in the embodiments and claims of this application are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that, unless otherwise stated, “a plurality” means two or more; the terms “first,” “second,” “third,” etc., are used only to distinguish and not to describe a particular order or sequence, nor should they be construed as indicating or implying relative importance. The term “and / or” as used herein refers to and includes any or all possible combinations of one or more associated listed items. When the above description relates to drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. In the description of this application, those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] The embodiments described above are merely examples of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. An air duct module, characterized in that, include: The housing assembly includes a housing and a first air inlet and a first air outlet disposed on the housing; the housing forms a hollow cavity. The fan assembly disposed within the housing assembly includes a fan body, a fan sleeve fitted around the periphery of the fan body, and a connecting component disposed on the fan sleeve. The fan sleeve divides the hollow cavity into a first cavity and a second cavity that are not interconnected. The connecting component is used to connect the first cavity and the second cavity to form an air duct. And a microporous cover disposed in the second cavity and covering the fan sleeve, the microporous cover being provided with a plurality of flow guide holes; External air can enter the fan assembly in sequence through the first air inlet, the first cavity, the connecting component, the second cavity, and the microporous cover, and finally be discharged from the first air outlet.

2. The air duct module of claim 1, wherein: The flow guide hole can be a circular hole or a polygonal hole.

3. The air duct module of claim 2, wherein: The microporous cover can be composed of multiple plates or formed in one piece.

4. The air duct module of claim 3, wherein: The connecting component is a connecting pipe, with one end of the connecting pipe located in the first cavity and the other end located in the second cavity.

5. The air duct module of claim 1, wherein: It also includes a long guide tube disposed in the first cavity, one end of which is connected to the first air inlet, and the other end of which is a free end connected to the first cavity.

6. The air duct module of claim 5, wherein: The guide tube is made of materials with good softness and elasticity, such as silicone.

7. The air duct module of claim 1, wherein: It also includes a pressure sensor group, which includes a first pressure sensor for collecting the output pressure of the gas, a second pressure sensor for collecting the gas pressure in the first cavity, and a third pressure sensor for collecting the gas pressure in the second cavity; the first pressure sensor is disposed on the fan outlet of the fan body; the second and third pressure sensors are disposed on the first housing.

8. The air duct module of claim 1, wherein: The outer casing includes a first housing and a second housing covering the first housing. The first air inlet is disposed on the first housing. The first housing and the second housing are connected to form a hollow cavity. The first cavity is enclosed by the fan sleeve and the first housing, and the second cavity is enclosed by the fan sleeve and the second housing.

9. The air duct module of claim 8, wherein: The first housing also includes grooves that serve as chambers for mixing different gases.

10. The air duct module according to claim 1, characterized in that: The fan body includes a fan and a fan guide pipe surrounding the fan. The fan guide pipe includes a fan inlet and a fan outlet. External gas can enter the first cavity through the first inlet, enter the second cavity through the connecting component, then pass through the microporous cover, flow through the gap between the fan body and the fan sleeve, enter the fan inlet, and then flow along the fan guide pipe and the fan outlet in sequence, and finally be discharged through the first outlet. The fan inlet is located at the bottom of the fan body, and the fan outlet is located on the side of the fan body.

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