ventilation system

Abstract

This application provides a ventilation system, including: an exhaust fan with an air inlet and an air outlet; an air outlet assembly connected to the air outlet; two air inlet assemblies respectively disposed on both sides of the air outlet assembly along a first direction; and a three-way assembly installed between the two air inlet assemblies, wherein a first branch interface and a second branch interface are respectively connected to an air inlet assembly via a first duct, and a third branch interface is connected to the exhaust fan air inlet; wherein the difference between the inner diameter of the first duct and the outer diameter of the air inlet assembly is less than or equal to 5 mm, the first duct is sleeved on the outside of the corresponding air inlet assembly at the connection position, and the connection position between the air inlet assembly and the first duct is fixed by a first clamp. This application reduces material costs, simplifies the construction process, and improves system safety by rationally setting the positions of each component, standardizing the specifications of each component, and using a clamp fixing method.

Description

Technical Field

[0001] This application relates to the field of ventilation equipment technology, and specifically to a ventilation system. Background Technology

[0002] Existing concealed duct fans on the market consist of a main unit, air outlets, and aluminum foil ducts forming a complete ventilation system. If the duct length exceeds 1.5 meters, a pre-embedded PVC rigid pipe connection is required. However, these components and duct sizes are inconsistent; for example, the inlet duct has an outer diameter of 75mm, and the outlet duct has an outer diameter of 100mm, but the pre-embedded connecting pipe on the construction site is a 110mm inner diameter PVC (Polyvinyl Chloride) rigid pipe. This inconsistency in product components leads to varying installation methods, including the use of adapters (sold separately) for assistance and direct internal insertion installation. Improper installation during connection directly affects ventilation efficiency.

[0003] Installation Assistance with Reducing Pipes (Sold Separately): In the field of embedded ventilation equipment, traditional exhaust fans often suffer from airflow short-circuiting problems due to unreasonable spatial layout of the air inlet and outlet. For example, by setting a reducing pipe at the front end of the outlet, the negative pressure zone at the air inlet is concentrated on the outside of the reducing pipe, avoiding the attraction of airflow to the outlet. The core of this technology lies in the fact that the diameter of the rear end of the reducing pipe is smaller than that of the front end, forming a trumpet-shaped structure. Its rounded transition design of the pipe wall not only separates the airflow but also guides it. When the airflow is discharged from the outlet, the reducing pipe guides the airflow to diffuse along a preset path, reducing turbulence. However, this method requires additional reducing pipes and other redundant accessories, increases material costs, complicates the construction process, is difficult to operate manually, and has low installation efficiency.

[0004] Direct insertion installation: This method is wasteful and insecure during on-site installation because the components of various products are not standardized. Small-diameter components are directly inserted into large-diameter components without other fixing facilities. There is a risk of the duct coming out, resulting in poor system stability. For example, if a 100mm duct is to be matched with a 110mm PVC pipe, the duct will be stuffed into the PVC pipe without other fixing facilities, resulting in poor application performance. Utility Model Content

[0005] In view of the problems of high material costs, complicated construction process and insufficient safety in the installation of ventilation systems in the prior art, the purpose of this application is to provide a ventilation system that reduces material costs, simplifies construction process and improves system safety by reasonably setting the position of each component, standardizing the specifications of each component and using clamp fixing method.

[0006] This application provides a ventilation system, including:

[0007] An exhaust fan, including an air inlet and an air outlet;

[0008] An air outlet assembly, wherein the air outlet assembly is connected to the air outlet of the ventilation fan;

[0009] Two air inlet assemblies are respectively disposed on both sides of the air outlet assembly along the first direction;

[0010] A three-way assembly is installed between the two air inlet assemblies. The first branch interface and the second branch interface of the three-way assembly are respectively connected to one of the air inlet assemblies through a first air duct. The third branch interface of the three-way assembly is connected to the air inlet of the ventilation fan. The first air duct is sleeved and connected to the first branch interface and the second branch interface respectively.

[0011] Wherein, the difference between the inner diameter of the first air duct and the outer diameter of the air inlet assembly is less than or equal to 5mm, the first air duct is sleeved on the outside of the corresponding air inlet assembly at the connection position, and the connection position between the air inlet assembly and the first air duct is fixed by a first clamp.

[0012] In some embodiments, the air outlet assembly is further connected to an outdoor or ventilation duct via a second air duct and a PVC pipe, wherein the difference between the outer diameter of the second air duct and the inner diameter of the PVC pipe is less than or equal to 5 mm.

[0013] In some embodiments, the inner diameter of the first duct and the second duct is 112 mm, the outer diameter of the air inlet assembly is 108 mm, and the inner diameter of the PVC pipe is 110 mm.

[0014] In some embodiments, the connection between the second duct and the PVC pipe is secured by a second clamp.

[0015] In some embodiments, the air outlet assembly is directly sleeved and connected to the air outlet of the ventilation fan, or the air outlet assembly is connected to the air outlet of the ventilation fan through a third air duct, and the connection position between the air outlet of the ventilation fan and the third air duct is fixed by a third clamp.

[0016] In some embodiments, the air inlet of the ventilation fan and the third branch interface of the three-way assembly are directly connected by a sleeve, or the air inlet of the ventilation fan and the third branch interface of the three-way assembly are connected by a fourth air duct, and the connection position of the air inlet of the ventilation fan and the third branch interface of the three-way assembly is fixed by a fourth clamp.

[0017] In some embodiments, the three-way assembly is disposed at the center of the two air inlets in a first direction, and the two first air ducts are of the same length.

[0018] In some embodiments, the difference between the outer diameter of the first branch interface and the second branch interface of the three-way assembly and the inner diameter of the first duct is less than or equal to 5 mm, and the two first ducts are respectively sleeved on the outside of the corresponding first branch interface and the second branch interface at the connection position.

[0019] In some embodiments, the first duct and / or the second duct is a flexible aluminum foil duct.

[0020] In some embodiments, the air inlet assembly includes an air inlet and an air inlet base, the air inlet being connected to the air inlet base, and the first air duct being sleeved on the outside of the air inlet base and fixed to the air inlet base by the first clamp.

[0021] The ventilation system provided in this application has the following advantages:

[0022] By adopting this application, when discharging polluted gas, two air inlet components can be installed indoors to draw air from two different locations. An air outlet component is installed between the two air inlet components to discharge air outwards. When drawing in fresh outdoor air, two air inlet components can be installed outdoors to absorb more fresh outdoor air, which is then discharged into the room through the air outlet components. This ventilation system has higher working efficiency, and the two air inlet components and one air outlet component are connected by a T-junction component, resulting in higher air circulation efficiency. Furthermore, by rationally setting the positions of each component and standardizing the specifications of each component, this application allows for direct splicing when connecting different components, making operation convenient and construction efficient. The use of clamps at each connection point improves the stability of the components, eliminating the need for additional variable diameter structures, reducing material costs, simplifying the construction process, and improving system safety. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0024] Figure 1 This is a schematic diagram of the structure of a ventilation system according to an embodiment of this application.

[0025] Figure label:

[0026] 1. Exhaust fan 7. First clamp

[0027] 2. Air outlet assembly 8. Second air duct

[0028] 3 First air inlet assembly 9 Second clamp

[0029] 4 Second air inlet assembly 10 PVC pipe

[0030] 5. Three-way assembly 11. Exhaust fan mounting hardware

[0031] 6 First air duct 13 Third clamp

[0032] 14 The Fifth Hoop Detailed Implementation

[0033] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted. The words “or” and “or” in the specification may mean “and” or “or”. Although the terms “upper,” “lower,” “between,” etc., may be used in this specification to describe different exemplary features and elements of this application, these terms are used herein only for convenience, such as the orientation according to the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although “first” or “second,” etc., are used in this specification to denote certain features, they are merely indicative of function and not as a limitation on the number or importance of specific features.

[0034] Figure 1 This is a schematic diagram of the structure of a ventilation system according to an embodiment of this application. Figure 1 As shown in the figure, this application provides a ventilation system, including: an exhaust fan 1, including an exhaust fan 1 air inlet and an exhaust fan 1 air outlet; an air outlet assembly 2, the air outlet assembly 2 being connected to the exhaust fan 1 air outlet; two air inlet assemblies, respectively disposed on both sides of the air outlet assembly 2 along a first direction; a three-way assembly 5, the three-way assembly 5 being installed between the two air inlet assemblies, the first branch interface and the second branch interface of the three-way assembly 5 being respectively connected to one of the air inlet assemblies through a first air duct 6, the third branch interface of the three-way assembly 5 being connected to the exhaust fan 1 air inlet, the first air duct 6 being sleeved and connected to the first branch interface and the second branch interface respectively; wherein, the difference between the inner diameter of the first air duct 6 and the outer diameter of the air inlet assembly is less than or equal to 5mm, the first air duct 6 is sleeved on the outside of the corresponding air inlet assembly at the connection position, and the connection position between the air inlet assembly and the first air duct 6 is fixed by a first clamp 7.

[0035] The ventilation system of this application can be configured in two different operating modes: one mode exhausts stale indoor air to the outside, and the other mode draws in fresh outdoor air to ventilate the room. For example, in the first operating mode, two air inlet assemblies are installed inside the room where air needs to be exhausted, allowing for separate air intake from two locations, thus improving air intake efficiency. An air outlet assembly 2 is installed between the two air inlet assemblies, connected to the outside or a ventilation duct, allowing the air outlet assembly 2 to exhaust stale indoor air to the outside. In the second operating mode, the two air inlet assemblies are installed in positions connected to fresh outdoor air, drawing in fresh outdoor air, while the air outlet assembly 2 is installed in the indoor exhaust position, releasing the drawn-in fresh air into the room. The following explanation uses the ventilation system in its first working mode as an example. For instance, the air inlet assembly can be positioned facing the interior of the bathroom, and the air outlet assembly 2 can be installed at a location connected to the outside or a ventilation duct. The ventilation fan 1 drives the airflow, thereby expelling the stale air inside the bathroom to the outside or into the building's ventilation duct.

[0036] This application achieves convenient operation and high construction efficiency by rationally setting the positions of each component and standardizing their specifications, allowing for direct connection between different components. Furthermore, the use of clamps at each connection point enhances the stability of the components, eliminating the need for additional variable diameter structures, reducing material costs, simplifying the construction process, and improving system safety.

[0037] In this embodiment, the ventilation fan 1 serves as the core power source of the ventilation system. Driven by a motor, the fan blades rotate to generate airflow, facilitating the exchange of indoor and outdoor air. The diameters of the ventilation fan 1 and its outlet are designed to match the diameters of other components in the ventilation system, such as 110mm, to ensure smooth airflow and reduce wind resistance. The ventilation fan 1 is installed in the required locations within the building using the ventilation fan mounting bracket 11, such as on the ceiling or wall. The mounting hole size corresponding to the ventilation fan mounting bracket 11 is, for example, 116mm * 105mm.

[0038] In this embodiment, the two air inlet assemblies include a first air inlet assembly 3 and a second air inlet assembly 4. The three-way assembly 5 is located at the center of the first air inlet assembly 3 and the second air inlet assembly 4 in a first direction. The two first air ducts 6 can be of the same length to ensure a relatively balanced airflow between the two air inlets and to shorten the length of the air inlet ducts on both sides, thereby reducing wind resistance. Each air inlet assembly includes an air inlet with a diameter of 110mm and a corresponding air inlet base. The air inlet is used to introduce the drawn air, and the air inlet base serves to fix the position of the air inlet and connect it to the first air duct 6. The air inlet is connected to one end of the aluminum foil duct through the air inlet base. The air inlet is located on the first side of the air inlet base, and the first air duct 6 is sleeved on the outside of the second side of the air inlet base and fixed to the air inlet base by the first clamp 7. The air inlet is a channel structure on the air inlet base for air inflow. A short pipe can be installed at the air inlet to connect with the indoor air inlet duct, or a vent panel with a grille / mesh can be installed. The outer diameter of the panel is, for example, 140 mm. In this embodiment, the difference between the outer diameter of the air inlet and the inner diameter of the first air duct 6 is also less than or equal to 5 mm, making the air passage between the air inlet and the first air duct 6 more unobstructed.

[0039] like Figure 1 As shown, in this embodiment, the air outlet assembly 2 is also connected to the outside or a ventilation duct via a second air duct 8 and a PVC pipe 10. The difference between the outer diameter of the second air duct 8 and the inner diameter of the PVC pipe 10 is less than or equal to 5 mm. Furthermore, a second clamp 9 is used to fix the second air duct 8 and the PVC pipe 10 at their connection point. The air outlet assembly 2 is used to exhaust indoor polluted air to the outside or into the building's ventilation ducts. The air outlet assembly 2 includes an air outlet and an air outlet base, the air outlet base being used to fix the position of the air outlet and connect to the air outlet of the ventilation fan 1.

[0040] In this embodiment, the first duct 6 and / or the second duct 8 are flexible aluminum foil ducts. The lengths of the first duct 6 and the second duct 8 are customized according to actual installation requirements. The first duct 6 serves as an air transmission channel, delivering the air introduced by the air inlet assembly to the tee assembly 5. A fifth clamp 14 is provided at the connection point between the first duct 6 and the tee assembly 5 to improve connection stability. The second duct 8 serves as an air transmission channel, discharging the gas discharged from the air outlet assembly 2 to the outdoor or building ventilation ducts. The designed diameter of the first duct 6 and the second duct 8 is 110mm. In actual applications, there may be some differences to meet the actual installation scenario and size adaptation requirements. Optionally, the inner diameter of the first duct 6 and the second duct 8 is 112mm, the outer diameter of the air inlet assembly is 108mm, and the inner diameter of the PVC pipe 10 is 110mm. Therefore, when the first duct 6 is fitted outside the air inlet assembly, it can naturally expand and fit tightly against the air inlet base. When the second duct 8 is fitted over the PVC pipe 10, it can naturally expand and fit tightly against the PVC pipe 10. Optionally, considering that the first duct 6 and the second duct 8 have a certain thickness, the outer diameter of the first duct 6 and the second duct 8 is 115mm.

[0041] The air inlet and outlet of the ventilation fan 1 can be optionally set to 108mm. This provides a suitable transition size for connection with the aluminum foil duct while ensuring good matching with the internal structure of the ventilation fan 1 and smooth airflow. The 108mm outer diameter forms a reasonable fit clearance with the 112mm inner diameter aluminum foil duct. This avoids difficulties in duct connection due to an excessively large outer diameter, and air leakage at the connection point due to an excessively small outer diameter, effectively ensuring the sealing performance and airflow transmission efficiency of the ventilation system. The 112mm inner diameter of the aluminum foil duct is an optimized size derived from extensive experiments and actual installation tests. This size design allows the aluminum foil duct to be easily fitted into a certain depth when fitted into a 110mm PVC pipe due to its flexibility, and a tight and secure connection can be achieved through proper clamping. At the same time, the small gap formed between the 112mm inner diameter and the 110mm outer diameter of the PVC pipe, while ensuring connection strength, can also alleviate stress caused by installation errors or thermal expansion and contraction of the pipe to a certain extent, improving the reliability and stability of the entire ventilation system.

[0042] In this embodiment, the T-junction assembly 5 includes three branch interfaces and a T-junction base. The T-junction assembly 5 serves to divert or converge airflow, guiding the air transmitted by the first duct 6 to the ventilation fan 1 and discharging it outwards through the outlet assembly 2, thereby achieving directional air discharge. Simultaneously, the structure of the T-junction assembly 5 facilitates assembly and connection, reducing construction difficulty. The difference between the outer diameter of the first and second branch interfaces of the T-junction assembly 5 and the inner diameter of the first duct 6 is less than or equal to 5mm. The two first ducts 6 are respectively fitted onto the outside of their corresponding first and second branch interfaces at the connection points. Optionally, each branch interface of the T-junction assembly 5 is designed with a diameter of 110mm to adapt the diameter of the first and second branch interfaces to the diameter of the first duct 6. The first duct 6 can be fitted onto the outside of the first and second branch interfaces and connected by a clamp.

[0043] In this embodiment, the clamps used are all composed of ring-shaped clamps made of metal and matching bolts and nuts. They are used to fix the connection between the duct and various components. For example, the first clamp 7 fixes the connection between the air inlet component and the first duct 6, and the second clamp 9 fixes the connection between the air outlet component 2 and the PVC pipe 10. The clamps prevent loosening, air leakage, or even duct detachment caused by airflow impact or long-term use, thus improving the safety and stability of the ventilation system. The working principle is as follows: the clamp is placed on the connection point to be fixed, the position is adjusted, and then the two ends of the clamp are tightened with bolts and nuts to firmly secure the connection. To ensure the firmness of the connection between the duct and the PVC rigid pipe, a special clamp can be designed. The size of the clamp is precisely designed according to the outer diameter of the 115mm duct on the 110mm PVC rigid pipe to ensure that the clamp fits tightly to the connection point.

[0044] When connecting the second duct 8 to the PVC pipe 10, the installation process may include: first, smoothly fitting the 115mm duct onto the 110mm rigid PVC pipe, ensuring a tight, gapless connection; then, fitting the special clamp onto the connection point and tightening the clamp using professional tools to securely connect the duct to the rigid PVC pipe. This standardized installation method avoids the duct detachment problems caused by not using clamps or insecure installation, while also reducing damage and waste caused by improper duct installation, thus improving the stability and reliability of the ventilation system.

[0045] In this embodiment, the air outlet base is directly sleeved to the air outlet of the ventilation fan 1, or the air outlet base is connected to the air outlet of the ventilation fan 1 through a third air duct, and the connection position between the air outlet of the ventilation fan 1 and the third air duct is fixed by a third clamp 13. The design diameter of both the air outlet base and the air outlet of the ventilation fan 1 is 110mm to achieve a seamless connection. The design size of the third air duct is also 110mm. To allow the third air duct to be sleeved on the outside of the air outlet base, the inner diameter of the third air duct is slightly larger than the outer diameter of the air outlet base. Then, the third clamp 13 is used to fix the connection position between the third air duct and the air outlet base. The air inlet of the ventilation fan 1 and the third branch interface of the three-way assembly 5 are directly sleeved to connect, or the air inlet of the ventilation fan 1 and the third branch interface of the three-way assembly 5 are connected through a fourth air duct, and the connection position between the air inlet of the ventilation fan 1 and the third branch interface of the three-way assembly 5 is fixed by a fourth clamp. The ventilation fan 1 can also be directly integrated with the air outlet assembly 2, in which case the third branch interface of the three-way assembly 5 is directly connected to the air outlet assembly 2 through the duct and clamp. The third and fourth ducts are also flexible aluminum foil ducts.

[0046] The working principle and process of the ventilation system using this application are as follows:

[0047] 1. Air Introduction Stage: Air is introduced into the ventilation system through the air inlet assembly. Two air inlets operate simultaneously to increase the air intake. Air enters the aluminum foil duct through the air inlet base. Since the diameter of the air inlet, base, and aluminum foil duct are all 110mm, air can pass through smoothly without wind resistance caused by diameter changes.

[0048] 2. Air Transmission Stage: The aluminum foil duct delivers the introduced air to the T-joint assembly 5, which guides the air to flow through the ventilation fan 1 towards the outlet assembly 2. During air transmission, the clamp fixing device ensures a tight connection between the aluminum foil duct, the inlet assembly, and the T-joint assembly 5 to prevent air leakage.

[0049] 3. Air Exhaust Stage: Air passes through the three-way assembly 5, then through the ventilation fan 1, into the air outlet assembly 2, and finally exits outdoors through the air outlet, completing the exchange of indoor and outdoor air. Similarly, the connection between the air outlet assembly 2 and the ventilation fan 1 and the three-way assembly 5 is also secured firmly and reliably using a clamp fixing device.

[0050] In summary, the ventilation system provided in this application has the following advantages:

[0051] By adopting this application, when discharging polluted gas, two air inlet assemblies can be installed indoors to draw air from two different locations. An air outlet assembly is installed between the two air inlet assemblies to discharge air outwards. When drawing in fresh outdoor air, two air inlet assemblies can be installed outdoors to absorb more fresh outdoor air, which is then discharged into the room through the air outlet assembly. This ventilation system has higher efficiency, and the two air inlet assemblies and one air outlet assembly are connected by a T-junction assembly, resulting in higher airflow efficiency. Furthermore, by standardizing the specifications of all components to 110mm, this application eliminates the need for additional diameter-changing fittings required in traditional installations due to the mismatch between 100mm ducts and 110mm PVC pipes, reducing the types and quantities of materials and thus lowering material costs. The dimensional design of this application is based on a comprehensive consideration of factors such as the tightness of the connection between the duct and the PVC rigid pipe, ventilation resistance, and ease of installation. By standardizing the duct size, various installation methods caused by size mismatches are eliminated, laying the foundation for stable installation and efficient operation of the ventilation system. With standardized specifications, installers no longer need to worry about connecting components of different sizes or perform complex variable-diameter installations. Components can be directly interlocked and then secured with clamps, making the installation process clearer and simpler, reducing manual labor and time, and improving construction efficiency. The clamp securing device reinforces each connection point; compared to traditional aluminum foil tape fixing methods, clamps provide stronger fixing force, effectively preventing ducts from falling off due to airflow impact or long-term use, ensuring stable system operation and improving safety.

[0052] In summary, this application has formed a complete technical solution by standardizing the specifications of each component of the ventilation fan system and adopting a clamp fixing device, which effectively solves the problems existing in the current installation process and achieves the goals of reducing costs, simplifying the process and improving safety.

[0053] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A ventilation system, characterized in that include: An exhaust fan, including an air inlet and an air outlet; An air outlet assembly, wherein the air outlet assembly is connected to the air outlet of the ventilation fan; Two air inlet assemblies are respectively disposed on both sides of the air outlet assembly along the first direction; A three-way assembly is installed between the two air inlet assemblies. The first branch interface and the second branch interface of the three-way assembly are respectively connected to one of the air inlet assemblies through a first air duct. The third branch interface of the three-way assembly is connected to the air inlet of the ventilation fan. The first air duct is sleeved and connected to the first branch interface and the second branch interface respectively. Wherein, the difference between the inner diameter of the first air duct and the outer diameter of the air inlet assembly is less than or equal to 5mm, the first air duct is sleeved on the outside of the corresponding air inlet assembly at the connection position, and the connection position between the air inlet assembly and the first air duct is fixed by a first clamp.

2. The vent system of claim 1, wherein, The air outlet assembly is also connected to an outdoor or ventilation duct via a second air duct and a PVC pipe, wherein the difference between the outer diameter of the second air duct and the inner diameter of the PVC pipe is less than or equal to 5 mm.

3. A ventilation system according to claim 2, characterised in that The inner diameter of the first and second air ducts is 112 mm, the outer diameter of the air inlet assembly is 108 mm, and the inner diameter of the PVC pipe is 110 mm.

4. The vent system of claim 2, wherein, The second air duct and the PVC pipe are fixed at the connection point by a second clamp.

5. The vent system of claim 1, wherein, The air outlet assembly is directly connected to the air outlet of the ventilation fan, or the air outlet assembly is connected to the air outlet of the ventilation fan through a third air duct, and the connection position between the air outlet of the ventilation fan and the third air duct is fixed by a third clamp.

6. The vent system of claim 1, wherein, The ventilation fan inlet and the third branch interface of the three-way assembly are directly connected by a sleeve, or the ventilation fan inlet and the third branch interface of the three-way assembly are connected by a fourth air duct, and the connection position of the ventilation fan inlet and the third branch interface of the three-way assembly is fixed by a fourth clamp.

7. The vent system of claim 1, wherein, The three-way assembly is located at the center of the two air inlets in the first direction, and the two first air ducts are of the same length.

8. The vent system of claim 1, wherein, The difference between the outer diameter of the first branch interface and the second branch interface of the three-way assembly and the inner diameter of the first air duct is less than or equal to 5mm, and the two first air ducts are respectively sleeved on the outside of the corresponding first branch interface and second branch interface at the connection position.

9. The vent system of claim 2, wherein, The first duct and / or the second duct are flexible aluminum foil ducts.

10. The vent system of claim 1, wherein, The air inlet assembly includes an air inlet and an air inlet base. The air inlet is connected to the air inlet base. The first air duct is sleeved on the outside of the air inlet base and fixed to the air inlet base by the first clamp.

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