Smoke exhaust system with multiple matched pipelines

Abstract

The utility model provides a smoke exhaust system with multiple matched pipelines, which relates to the field of kitchen electric equipment and comprises an auxiliary fan, a public flue, an indoor fan, a smoke collecting device, a first pipeline and a second pipeline. The public flue and the first pipeline are arranged between the auxiliary fan and the indoor fan, and the second pipeline is arranged between the indoor fan and the smoke collecting device; the auxiliary fan, the public flue, the first pipeline, the indoor fan, the second pipeline and the smoke collecting device are sequentially connected, the inner diameter of the second pipeline is 1.1-2 times of the inner diameter of the first pipeline, the multiple sections of pipelines are matched, the whole flow channel is optimized, the smoke suction effect is better under the same working condition, and the working efficiency of the range hood is improved.

Description

Technical Field

[0001] The present application relates to the field of kitchen appliances, and in particular to a smoke exhaust system with multiple pipes. Background Art

[0002] The range hood is a device used in the kitchen. Currently, public flues are installed by connecting them in sections, and it is difficult to ensure that the connection between the two sections is completely sealed. In addition, the flue is inevitably bumped during the production and transportation process, which often causes cracks or small holes to appear on the flue wall. When the range hood exhausts smoke into the public flue, the inside of the flue is at positive pressure, which is higher than the kitchen pressure. The smoke will leak into the kitchen, causing smoke and odor to leak back into the kitchen. This is the main reason for smoke and odor leakage in many high-rise buildings. Utility Model Content

[0003] The purpose of the utility model is to provide a multi-pipeline smoke exhaust system to address at least one of the above-mentioned existing technical problems, in which an auxiliary fan assists the indoor fan to exhaust smoke and the smoke exhaust pipes are coordinated to enhance the smoke exhaust capacity of the smoke exhaust pipes and improve user experience.

[0004] The present application provides a multi-pipeline coordinated smoke exhaust system, including an auxiliary fan, a common flue, an indoor fan, a smoke collection device, a first pipe, and a second pipe;

[0005] The common flue and the first pipe are arranged between the auxiliary fan and the indoor fan, and the second pipe is arranged between the indoor fan and the smoke collecting device;

[0006] The auxiliary fan, the common flue, the first pipe, the indoor fan, the second pipe and the smoke collecting device are connected in sequence.

[0007] The inner diameter of the second pipe is 1.1 to 2 times the inner diameter of the first pipe.

[0008] In a possible implementation manner, an electric valve is further included, and the electric valve is arranged on the pipeline between the public flue and the first pipeline.

[0009] The indoor fan is arranged above the suspended ceiling, the air outlet of the electric valve is at the same height as the air outlet of the indoor fan, and the first pipeline is horizontal.

[0010] In a possible implementation manner, the inner diameter of the second pipe is greater than or equal to 220 mm.

[0011] In a possible implementation manner, an indoor control device is further included, wherein the indoor control device is integrated with the indoor fan, and the indoor control device can output operating information of the indoor fan and operating information of the electric valve.

[0012] In a possible implementation manner, when the indoor fan is in operation, the electric valve can open the first pipe, the fluid can be discharged through the first pipe, and the electric valve can adjust the flow rate of the fluid in the first pipe.

[0013] In a possible implementation manner, a fire damper is further included, wherein the fire damper is connected to the electric valve and is arranged on a pipeline between the electric valve and the public flue.

[0014] In a possible implementation manner, the driving devices of the indoor fan and the auxiliary fan are DC motors.

[0015] In a possible implementation manner, a check valve is further included, the electric valve is sleeved on the check valve, and the check valve can prevent external fluid from entering the first pipe from the common flue.

[0016] In a possible implementation manner, the operation information of the indoor fan includes speed information and gear information of the indoor fan, and the operation information of the electric valve includes the opening degree of the electric valve.

[0017] In a possible implementation manner, the indoor fan is provided with an air outlet hood, and the first duct is sleeved on the air outlet hood.

[0018] The present application provides a multi-pipeline smoke exhaust system, which has the following beneficial effects:

[0019] The present application provides a multi-pipeline smoke exhaust system, including an auxiliary fan, a common flue, an indoor fan, a smoke collecting device, a first pipe and a second pipe; the common flue and the first pipe are arranged between the auxiliary fan and the indoor fan, and the second pipe is arranged between the indoor fan and the smoke collecting device; the auxiliary fan, the common flue, the first pipe, the indoor fan, the second pipe and the smoke collecting device are connected in sequence, the inner diameter of the second pipe is 1.1 to 2 times the inner diameter of the first pipe, and multiple sections of pipes are coordinated to optimize the overall flow channel, so that the smoke extraction effect is better under the same working conditions, and the working efficiency of the range hood is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a multi-pipeline smoke exhaust system provided in an embodiment of the present application;

[0022] Figure 2A schematic diagram of the structure of a second pipeline provided in an embodiment of the present application;

[0023] Figure 3 A schematic diagram of the structure of the interior of a kitchen using the smoke exhaust system provided in an embodiment of the present application;

[0024] Figure 4 A schematic diagram of the interior structure of a multi-floor kitchen using the smoke exhaust system provided in an embodiment of the present application.

[0025] The following is a supplementary description of the attached drawings:

[0026] 10. Auxiliary fan; 11. Auxiliary pipeline; 12. Flue base; 13. Public flue; 14. Fire damper; 15. Electric valve; 16. First pipeline; 20. Indoor fan; 21. Second pipeline; 30. Smoke collection device. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 of the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may include one or more of the features explicitly or implicitly. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here.

[0029] The following describes a smoke exhaust control system provided by an embodiment of the present application in conjunction with the accompanying drawings. The smoke exhaust control system of the present application is particularly suitable for users on multiple floors.

[0030] See also Figure 1-4 The present application provides a multi-pipeline smoke exhaust system, including an auxiliary fan 10, a common flue 13, an indoor fan 20, a smoke collecting device 30, a first pipe 16 and a second pipe 21; the common flue 13 and the first pipe 16 are arranged between the auxiliary fan 10 and the indoor fan 20, and the second pipe 21 is arranged between the indoor fan 20 and the smoke collecting device 30; the auxiliary fan 10, the common flue 13, the first pipe 16, the indoor fan 20, the second pipe 21 and the smoke collecting device 30 are connected in sequence, and the inner diameter of the second pipe 21 is 1.1 to 2 times the inner diameter of the first pipe 16. Through the connection of pipes of different sizes, each pipe cooperates with each other, so that the pipes cooperate with each other, the pipeline components operate efficiently, and the use effect of the range hood is improved.

[0031] It is understandable that the public flue 13 is currently installed by connecting sections together, and it is difficult to ensure that the connection between the two sections is completely sealed. In addition, the flue is inevitably bumped during the production and transportation process, which often causes cracks or small holes to appear on the flue wall. When the range hood exhausts smoke into the public flue 13, the inside of the flue is at a positive pressure, which is higher than the kitchen pressure. The oil smoke will leak into the kitchen, causing smoke and odor to leak back. This is the main reason for the smoke and odor problems in many real estate projects.

[0032] Specifically, the smoke oil fluid generated by the user during cooking passes through the smoke collecting device 30 , the second pipe 21 , the indoor fan 20 , the first pipe 16 and the common flue 13 in sequence.

[0033] Furthermore, the smoke exhaust system includes an auxiliary fan 10, a fire damper 14, an electric valve 15, an indoor fan 20, a smoke collection device 30 and a pipeline assembly. The pipeline assembly includes an auxiliary pipe 11, a common flue 13, a first pipe 16 and a second pipe 21. The fumes generated by the user in the kitchen can pass through the second pipe 21, the first pipe 16, the common flue 13 and the auxiliary pipe 11 in sequence, so that the fumes are discharged into the room.

[0034] Specifically, the auxiliary pipe 11 is arranged between the auxiliary fan 10 and the flue base 12, so that the auxiliary fan 10 is connected to the common flue 13, the common flue 13 is arranged between the flue base 12 and the fire damper 14, the first pipe 16 is arranged between the fire damper 14 and the indoor fan 20, the second pipe 21 is arranged between the smoke collection device 30 and the indoor fan 20, and the second pipe 21 is arranged inside the range hood.

[0035] Specifically, the size of the common flue 13 is selected according to the total number of floors in accordance with standard atlas 16J916, the effective ventilation area of ​​the auxiliary pipe 11 is larger than that of the common flue 13, the effective ventilation diameter of the first pipe 16 is 160mm-180mm, and the second pipe 21 is 200mm-300mm. The inner diameter of the second pipe 21 is 1.1 to 2 times the inner diameter of the first pipe 16.

[0036] Optionally, the shape of each pipeline assembly can be circular, rectangular or other shapes, and pipelines of different shapes should ensure that the effective ventilation cross-sectional area of ​​the fluid in each pipeline meets the specified requirements.

[0037] Specifically, the smoke collecting device 30 is arranged inside the user's kitchen and is exposed to the user's field of vision. The smoke collecting device 30 is in direct contact with the oil smoke generated by the user's use of the kitchen. The smoke collecting device 30 effectively collects and processes the oil smoke generated in the kitchen to prevent pollution to the indoor air and environment. The smoke collecting device 30 of the range hood includes a range hood and a smoke collecting device. The range hood is installed above the stove to collect the oil smoke and smoke generated during cooking. The smoke collecting device includes a filter, a sedimentation chamber and other components to filter and separate grease particles and odor substances in the oil smoke.

[0038] Furthermore, it also includes an electric valve 15, which is arranged on the pipeline between the public flue 13 and the first pipeline 16, and the indoor fan 20 is arranged above the ceiling. The air outlet of the electric valve 15 is at the same height as the air outlet of the indoor fan 20, and the first pipeline 16 is horizontal. Through the adjustment of the electric valve 15, the exhaust volume of the indoor fan 20 can be controlled, thereby realizing indoor air circulation and ventilation. Ensuring that the air outlet of the electric valve 15 is at the same height as the air outlet of the indoor fan 20 can effectively avoid interference with wind direction and uneven air flow, and reduce the resistance coefficient of the fluid passing through the first pipeline 16.

[0039] Specifically, the electric valve 15 is used to control the opening and closing of the smoke exhaust port. When the range hood is working, the electric valve 15 can automatically open to allow smoke and oil fume to be discharged, keeping the kitchen air fresh. When the range hood stops working, the electric valve 15 will automatically close to prevent external air from entering the smoke exhaust port, thereby effectively preventing oil fume and odor from spreading to other rooms and keeping the entire living environment clean and comfortable.

[0040] Specifically, the electric valve 15 is disposed between the common flue 13 and the first pipe 16, and the indoor control device can adjust the angle of the electric valve 15, thereby adjusting the air volume.

[0041] Furthermore, the inner diameter of the second pipe 21 is greater than or equal to 220 mm. The effective ventilation diameter of the fluid in the second pipe 21 is 220 mm. Setting a suitable ventilation diameter helps to increase the exhaust volume and efficiency of the exhaust system. A suitable pipe inner diameter can accommodate more fluid flow, thereby improving the processing capacity of the exhaust system, that is, more oil smoke and odor can be effectively discharged outdoors, thereby improving the kitchen air quality. In addition, a suitable pipe inner diameter can also reduce air resistance, reduce the energy consumption of the exhaust system, and improve the stability and durability of the system.

[0042] Specifically, the second pipe 21 is usually made of stainless steel or aluminum alloy. The second pipe 21 has the characteristics of corrosion resistance and high temperature resistance and is suitable for use in a kitchen environment.

[0043] Specifically, the inner diameter of the second pipe 21 determines the velocity of the fluid. On the basis of satisfying the exhaust volume, the wind speed can be reduced by increasing the equivalent cross-sectional area, that is, increasing the inner diameter of the second pipe 21 can reduce the wind speed of the fluid in the second pipe 21.

[0044] Furthermore, it also includes an indoor control device, which is integrated with the indoor fan 20 and can output the operation information of the indoor fan 20 and the operation information of the electric valve 15. The indoor control device can monitor the operation status, energy consumption and other data of the indoor fan 20 and the electric valve 15 in real time, which helps to find and solve problems in time and improve the reliability and stability of the system. The indoor control device can also perform data analysis to provide strong support for system optimization and improvement and improve the overall performance of the smoke exhaust system.

[0045] Specifically, the indoor control device includes the motor drive system of the range hood and the switch control system of the range hood. After receiving the electrical signal, the indoor control device can take corresponding actions to adjust the speed of the indoor fan 20. The indoor control device can adjust the speed and current gear of the indoor fan 20, and can also adjust the opening of the electric valve 15.

[0046] Specifically, the operation information of the indoor fan 20 includes the rotation speed and current gear of the indoor fan 20 , and the operation information of the electric valve 15 includes the opening degree of the electric valve 15 .

[0047] Furthermore, when the indoor fan 20 is in operation, the fluid can be discharged through the first pipe 16, and the electric valve 15 is used to adjust the flow rate of the fluid through the first pipe. By adjusting the flow rate of the fluid in the first pipe 16 through the electric valve 15, the exhaust volume can be flexibly controlled and adjusted according to actual needs, thereby achieving precise control of the smoke exhaust system.

[0048] Specifically, by adjusting the flow rate of the fluid in the first pipe 16 through the electric valve 15, the exhaust volume can be flexibly adjusted according to actual needs, thereby avoiding energy waste and realizing energy consumption optimization of the smoke exhaust system. The electric valve 15 adjusts the flow rate of the fluid in the first pipe 16, thereby better controlling the fluid flow, maintaining the stable operation of the smoke exhaust system, avoiding system problems caused by excessive or insufficient exhaust volume, and improving the stability and reliability of the system.

[0049] Furthermore, a fire damper 14 is included, which is connected to the electric valve 15 and is arranged on the pipeline between the electric valve 15 and the public flue 13. The fire damper 14 can be automatically closed when a fire occurs, preventing the fire from spreading to other areas, reducing the impact of the fire on the entire building, and improving the fire safety of the building. Through the setting of the fire damper 14, the smoke exhaust system is divided into different fire zones. When a fire occurs in a certain area, the fire damper 14 can be closed to prevent the fire from spreading to other areas.

[0050] Specifically, the fire damper 14 is connected to the electric valve 15, realizing intelligent integration with the exhaust system. When the fire damper 14 is closed, the corresponding electric valve 15 can be automatically closed to prevent the fire smoke from spreading to other areas through the exhaust system. The fire damper 14 can also have a pressure relief function. When overpressure is generated inside the exhaust system, the fire damper 14 can be opened to release the internal pressure and protect the safe operation of the exhaust system.

[0051] Furthermore, the driving devices of the indoor fan 20 and the auxiliary fan 10 are DC motors. Using DC motors as the driving devices of the indoor fan 20 and the auxiliary fan 10 can adjust the frequency and speed according to actual load requirements to meet different working conditions, thereby greatly improving the efficiency of the equipment and reducing energy consumption.

[0052] Specifically, the DC motor used in this embodiment has higher power supply efficiency than the AC motor. The DC variable frequency motor has stable performance and a long service life, which can improve the reliability of the equipment, reduce maintenance costs and failure rates, and extend the service life of the equipment.

[0053] Furthermore, a check valve is included, and the electric valve 15 is sleeved on the check valve, and the check valve can prevent external fluid from entering the first pipe 16 from the public flue 13. The check valve can effectively prevent the backflow of external fluid, and prevent harmful gases or pollutants in the public flue 13 from entering the first pipe 16, thereby improving indoor air quality and ensuring the health and safety of users.

[0054] In one embodiment, a check valve is disposed at the air outlet of the indoor fan 20 to prevent outside air from entering the second duct 21 .

[0055] Specifically, by preventing external fluid from entering the first pipe 16, pollutants can be effectively prevented from entering the pipe system, protecting the cleanliness and sanitation of the indoor and external environments. The check valve can avoid mixing of external fluids in the pipe system, reduce pressure fluctuations and shocks in the pipe, and help extend the service life of the pipe and related equipment.

[0056] Furthermore, the inner diameter of the first pipe 16 is greater than or equal to 160 mm. By setting the inner diameter of the first pipe 16, the effective area for fluid circulation is determined, and the coordination effect of each pipe is further improved.

[0057] In this embodiment, the equivalent diameter of the first pipe 16 is 160 mm, and the equivalent diameter of the second pipe 21 is 220 mm. The effective ventilation size of the second pipe 21 directly determines the effect of the fluid entering the range hood, such as the flow rate of the fluid and the noise generated in the pipe.

[0058] Optionally, the first pipe 16 can be made of the commonly used aluminum foil smoke pipe material, or can be a stainless steel smoke pipe or an aluminum metal smoke pipe.

[0059] Furthermore, the indoor fan 20 is provided with an air outlet hood, and the first pipe 16 is sleeved on the air outlet hood. The air outlet hood can effectively guide the air discharged by the indoor fan 20, so that the air is evenly distributed indoors, avoiding the situation of insufficient or excessive local ventilation, reducing wind resistance, reducing the energy consumption of the fan, and improving the energy efficiency of the system.

[0060] Specifically, the first pipe 16 is mounted on the air outlet cover to protect the fan outlet from the external environment, thereby extending the service life of the fan and pipeline equipment. The air outlet cover can beautify the indoor space, make the fan outlet look neater and more beautiful, and improve the overall performance of the system.

[0061] The following introduces specific embodiments of the present application based on the above technical solution.

[0062] Example 1

[0063] See also Figure 1-Figure 4 The present application provides a multi-pipeline smoke exhaust system, including an auxiliary fan 10, a common flue 13, an indoor fan 20, a smoke collecting device 30, a first pipe 16 and a second pipe 21; the common flue 13 and the first pipe 16 are arranged between the auxiliary fan 10 and the indoor fan 20, and the second pipe 21 is arranged between the indoor fan 20 and the smoke collecting device 30; the auxiliary fan 10, the common flue 13, the first pipe 16, the indoor fan 20, the second pipe 21 and the smoke collecting device 30 are connected in sequence, and the inner diameter of the second pipe 21 is 1.1 to 2 times the inner diameter of the first pipe 16.

[0064] Specifically, the smoke oil fluid generated by the user during cooking passes through the smoke collecting device 30, the second pipe 21, the indoor fan 20, the first pipe 16 and the common flue 13 in sequence. The indoor fan 20 is provided with an air outlet hood, the first pipe 16 is sleeved on the air outlet hood, and the driving devices of the indoor fan 20 and the auxiliary fan 10 are DC motors.

[0065] The smoke exhaust system includes an auxiliary fan 10, a fire damper 14, an electric valve 15, an indoor fan 20, a smoke collector 30 and a pipeline assembly. The pipeline assembly includes an auxiliary pipeline 11, a public flue 13, a first pipeline 16 and a second pipeline 21. The electric valve 15 is used to control the opening and closing of the smoke exhaust port.

[0066] The auxiliary duct 11 is arranged between the auxiliary fan 10 and the flue base 12, the common flue 13 is arranged between the flue base 12 and the fire damper 14, the first duct 16 is arranged between the fire damper 14 and the indoor fan 20, the second duct 21 is arranged between the smoke collection device 30 and the indoor fan 20, and the second duct 21 is arranged inside the range hood.

[0067] The size of the public flue 13 is selected according to the total number of floors in accordance with standard atlas 16J916, the effective ventilation area of ​​the auxiliary pipe 11 is larger than the public flue 13, the effective ventilation diameter of the first pipe 16 is greater than or equal to 160 mm, and the second pipe 21 is greater than or equal to 220 mm, wherein the first pipe 16 and the second pipe 21 are circular pipes.

[0068] The smoke collecting device 30 is arranged inside the user's kitchen.

[0069] The electric valve 15 is arranged between the common flue 13 and the first pipe 16, and the indoor control device can adjust the angle of the electric valve 15 to adjust the air volume.

[0070] When the indoor fan 20 is in operation, the fluid can be discharged through the first pipe. The electric valve 15 is used to adjust the flow rate of the fluid through the first pipe. The fire damper 14 is also included. The fire damper 14 is connected to the electric valve 15. The fire damper 14 is arranged on the pipeline between the electric valve 15 and the public flue 13.

[0071] It also includes a check valve, on which the electric valve 15 is sleeved, and the check valve can prevent external fluid from entering the first pipe 16 from the common flue 13 .

[0072] Example 2

[0073] Embodiment 2 further includes an indoor control device, which is integrated with the indoor fan 20 and can output the operation information of the indoor fan 20 and the operation information of the electric valve 15. The indoor control device can monitor the operation status, energy consumption and other data of the indoor fan 20 and the electric valve 15 in real time, which helps to find and solve problems in time and improve the reliability and stability of the system.

[0074] The above disclosures are only several preferred embodiments of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A multi-pipeline smoke exhaust system, characterized in that: It comprises an auxiliary fan (10), a common flue (13), an indoor fan (20), a smoke collecting device (30), a first pipeline (16) and a second pipeline (21); The auxiliary fan (10) and the indoor fan (20) are used to discharge the oil smoke collected by the smoke collecting device (30). The common flue (13) and the first pipe (16) are arranged between the auxiliary fan (10) and the indoor fan (20), and the second pipe (21) is arranged between the indoor fan (20) and the smoke collecting device (30); The auxiliary fan (10), the common flue (13), the first pipe (16), the indoor fan (20), the second pipe (21) and the smoke collecting device (30) are connected in sequence. The inner diameter of the second pipe (21) is 1.1 to 2 times the inner diameter of the first pipe (16).

2. The multi-pipe smoke exhaust system according to claim 1 is characterized in that: It also includes an electric valve, wherein the electric valve (15) is arranged on the pipeline between the public flue (13) and the first pipeline (16). The indoor fan (20) is arranged above the suspended ceiling, the air outlet of the electric valve (15) is at the same height as the air outlet of the indoor fan (20), and the first pipe (16) is horizontal.

3. The multi-pipe smoke exhaust system according to claim 1, characterized in that: The inner diameter of the second pipe (21) is greater than or equal to 220 mm.

4. The multi-pipe smoke exhaust system according to claim 2, characterized in that: It also includes an indoor control device, which is integrated with the indoor fan (20).

5. The multi-pipe smoke exhaust system according to claim 2, characterized in that: When the indoor fan (20) is in operation, the fluid can be discharged through the first pipe (16), and the electric valve (15) is used to adjust the flow rate of the fluid passing through the first pipe (16).

6. The multi-pipe smoke exhaust system according to claim 2, characterized in that: It also includes a fire damper, which is connected to the electric valve (15) and is arranged on the pipeline between the electric valve (15) and the public flue (13).

7. The multi-pipeline smoke exhaust system according to any one of claims 1 to 3, characterized in that: The driving devices of the indoor fan (20) and the auxiliary fan (10) are direct current motors.

8. The multi-pipe smoke exhaust system according to claim 2, characterized in that: It also comprises a check valve, on which the electric valve (15) is sleeved, and the check valve can prevent external fluid from entering the first pipe (16) from the common flue (13).

9. The multi-pipeline smoke exhaust system according to claim 4, characterized in that: The inner diameter of the first pipe (16) is greater than or equal to 160 mm.

10. The multi-pipeline smoke exhaust system according to any one of claims 1 to 3, characterized in that: The indoor fan (20) is provided with an air outlet cover, and the first pipeline is sleeved on the air outlet cover.

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