Secondary smoke exhaust device

Abstract

The utility model belongs to the technical field of smoke exhaust pipelines, and particularly relates to a secondary smoke exhaust device which comprises a main exhaust pipeline, one end of the main exhaust pipeline extends out of a building and is communicated with a windproof air pulling hood, and the other end of the main exhaust pipeline is communicated with the air outlet end of a smoke exhaust ventilator through a connecting hose; a secondary exhaust pipeline is arranged in the main exhaust pipeline, the air outlet end of the secondary exhaust pipeline is arranged in the main exhaust pipeline and faces the windproof air pulling hood, the air inlet end of the secondary exhaust pipeline extends out of the side wall of the main exhaust pipeline and communicates with an outer sleeve, and a plurality of air inlet parts are arranged in the outer sleeve. The outer sleeve communicates with the air outlet end of the air inlet part, and the air inlet end of the air inlet part is located on the top of a room. The range hood is used as a power source for exhausting, gas at the top of a kitchen is exhausted through the gas inlet part, harmful smoke is prevented from being deposited at the top of a room through the arrangement, and effective exhausting of the top of the room is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of smoke exhaust pipes, and in particular relates to a secondary smoke exhaust device. Background Art

[0002] When it comes to indoor pollution, apart from factors such as decoration, the biggest source of pollution is the kitchen. The kitchen is a disaster area for household air pollution. Research from the Indoor Environment Monitoring Center of the China Interior Decoration Association shows that there are two main sources of pollution in the kitchen: one is kitchen fire sources such as coal gas and liquefied gas, which may release harmful gases such as carbon monoxide and nitrogen oxides when burned; the other is the fumes produced when cooking dishes, as well as harmful substances such as radon, formaldehyde, benzene, ammonia, esters, and trichloroethylene that cause cancer and serious diseases such as leukemia when food is heated at high temperatures.

[0003] Indoor environmental pollution has caused 35.7% of respiratory diseases, 22% of chronic lung diseases and 15% of tracheitis, bronchitis and lung cancer. Some infectious diseases can also spread to other residents' rooms through flues, leading to disease transmission.

[0004] Most of these harmful gases and substances will be sucked into the public flue by the range hood, but since the air inlet of the range hood is often located at a low position, it is difficult to suck out the oil smoke that rises to the top of the kitchen. As a result, this part of the oil smoke will be adsorbed in the top area of ​​the kitchen. On the one hand, it is difficult to clean, and on the other hand, various harmful substances will remain on the top of the kitchen. Therefore, a secondary smoke exhaust device is urgently needed to solve this problem. Utility Model Content

[0005] The purpose of the utility model is to provide a secondary smoke exhaust device to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The secondary smoke exhaust device comprises: a main exhaust duct, one end of which extends out of the building and is connected to a windproof air extraction hood, and the other end of which is connected to the air outlet end of the range hood through a connecting hose;

[0008] A secondary exhaust duct is provided in the main exhaust duct, and an air outlet end of the secondary exhaust duct is provided in the main exhaust duct. The air outlet end of the secondary exhaust duct is arranged toward the windproof and air extraction hood. The air inlet end of the secondary exhaust duct extends out of the side wall of the main exhaust duct. The air inlet end of the secondary exhaust duct is connected with an outer sleeve. A plurality of air inlet parts are provided in the outer sleeve. The outer sleeve is connected with the air outlet end of the air inlet part. The air inlet end of the air inlet part is located at the top of the room.

[0009] Preferably, the air inlet portion comprises a branch pipe, the air inlet end of the branch pipe is located at the top of the room, the air outlet end of the branch pipe is located in the outer casing, and the branch pipe is fixedly connected to and communicated with the outer casing;

[0010] The middle part of the branch pipe is connected with a flow control valve for adjusting the air flow.

[0011] Preferably, the secondary exhaust pipe is an L-shaped structure.

[0012] Preferably, the outlet end of the secondary exhaust pipe is coaxially arranged with the main exhaust pipe.

[0013] Preferably, the inner diameter of the main exhaust pipe is twice the outer diameter of the secondary exhaust pipe.

[0014] Preferably, when the number of the branch pipe is one, the air outlet end of the branch pipe is coaxially fixedly connected with the air inlet end of the outer sleeve, and the outer diameter of the branch pipe matches the inner diameter of the outer sleeve.

[0015] Preferably, when there are multiple branch pipes, the air outlet ends of the multiple branch pipes are arranged in the outer sleeve, each branch pipe is fixedly connected and communicated with the outer sleeve, and the joints between the multiple branch pipes and the outer sleeve are filled with sealing foam glue.

[0016] Compared with the prior art, the utility model has the following advantages and technical effects:

[0017] When in use, by starting the range hood, the range hood sucks in the smoke in the middle of the kitchen and discharges it into the main exhaust duct through the connecting hose, moves to the windproof air extraction hood in the main exhaust duct, and then discharges it to the outside of the building. Since the air outlet end of the secondary exhaust duct is arranged in the main exhaust duct, and the air outlet end of the secondary exhaust duct is arranged toward the windproof air extraction hood, when the airflow direction in the main exhaust duct moves toward the windproof air extraction hood, due to the Bernoulli principle, the airflow in the main exhaust duct will drive the airflow at the air outlet end of the secondary exhaust duct and move it toward the windproof air extraction hood together, and the windproof air extraction hood will discharge the gas, and the secondary exhaust duct is connected to the air intake part through the outer sleeve. The air intake end of the air intake part is arranged at the top of the room, so that when the range hood is used as a power source for exhaust, the gas on the top of the kitchen can be discharged together through the air intake part. By such an arrangement, harmful smoke is prevented from accumulating on the top of the room, and effective exhaust is achieved on the top of the room. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor:

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a cross-sectional view of the structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0022] Figure 4 This is a schematic diagram of the structure of Embodiment 3 of the present utility model;

[0023] Figure 5 For this utility model Figure 4 A partial enlarged view of the middle part;

[0024] Figure 6 This is a schematic diagram of the structure of Embodiment 4 of the present utility model;

[0025] Among them, 1. main exhaust duct; 2. secondary exhaust duct; 3. windproof air extraction hood; 4. outer sleeve; 5. range hood; 6. connecting hose; 7. branch pipe; 8. flow control valve; 9. non-powered hood; 10. centrifugal impeller; 11. rotating ring; 12. ball bearing; 13. transmission shaft; 14. mounting rod; 15. bushing; 16. exhaust fan. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] Embodiment 1:

[0029] Reference Figure 1 to Figure 2 This embodiment discloses a secondary smoke exhaust device, comprising: a main exhaust duct 1, one end of the main exhaust duct 1 extends out of the building and is connected to a windproof air extraction hood 3, and the other end of the main exhaust duct 1 is connected to the air outlet end of a range hood 5 through a connecting hose 6;

[0030] A secondary exhaust duct 2 is provided in the main exhaust duct 1. The air outlet end of the secondary exhaust duct 2 is provided in the main exhaust duct 1. The air outlet end of the secondary exhaust duct 2 is arranged toward the windproof air extraction hood 3. The air inlet end of the secondary exhaust duct 2 extends out of the side wall of the main exhaust duct 1. The air inlet end of the secondary exhaust duct 2 is connected with an outer sleeve 4. A plurality of air inlet parts are provided in the outer sleeve 4. The outer sleeve 4 is connected with the air outlet end of the air inlet part. The air inlet end of the air inlet part is located at the top of the room.

[0031] When in use, by starting the range hood 5, the range hood 5 sucks the smoke in the middle of the kitchen and discharges it into the main exhaust duct 1 through the connecting hose 6, and then moves to the windproof air extraction hood 3 in the main exhaust duct 1 and then discharges it to the outside of the building. Since the outlet end of the secondary exhaust duct 2 is arranged in the main exhaust duct 1, and the outlet end of the secondary exhaust duct 2 is arranged toward the windproof air extraction hood 3, when the airflow direction in the main exhaust duct 1 moves toward the windproof air extraction hood 3, due to the Bernoulli principle, the airflow in the main exhaust duct 1 will drive the airflow at the outlet end of the secondary exhaust duct 2 and move it toward the windproof air extraction hood 3 together, and the windproof air extraction hood 3 will discharge the gas, and the secondary exhaust duct 2 is connected to the air intake part through the outer sleeve 4. The air intake end of the air intake part is arranged at the top of the room, so that when the range hood 5 is used as a power source for exhaust, the gas at the top of the kitchen can be discharged together through the air intake part. By such an arrangement, harmful smoke is prevented from accumulating at the top of the room, and effective exhaust is achieved at the top of the room.

[0032] The setting of the windproof and air-extraction hood 3 can prevent rain and snow as well as the backflow of air in the main exhaust duct 1. At the same time, when the range hood 5 stops running, the windproof and air-extraction hood 3 has an air-extraction effect, so the air in the main exhaust duct 1 can be continuously discharged, and then the air at the top of the room can be continuously discharged through the secondary exhaust duct 2 and the air intake part, realizing unpowered and gap-free continuous ventilation.

[0033] According to a further optimized solution, the air inlet portion includes a branch pipe 7, the air inlet end of the branch pipe 7 is located at the top of the room, the air outlet end of the branch pipe 7 is located in the outer sleeve 4, and the branch pipe 7 is fixedly connected and communicated with the outer sleeve 4;

[0034] The middle part of the branch pipe 7 is connected with a flow control valve 8 for adjusting the air flow.

[0035] The windproof and air-extracting hood 3 is preferably a multifunctional kitchen and bathroom windproof hood disclosed in Chinese patent publication number CN202769690U.

[0036] According to a further optimized solution, the secondary exhaust pipe 2 is an L-shaped structure.

[0037] To further optimize the solution, the outlet end of the secondary exhaust pipe 2 is coaxially arranged with the main exhaust pipe 1 .

[0038] According to a further optimization scheme, the inner diameter of the main exhaust pipe 1 is twice the outer diameter of the secondary exhaust pipe 2 .

[0039] Embodiment 2:

[0040] refer to Figure 3 The difference between this embodiment and embodiment 1 is that when the number of branch pipe 7 is one, the outlet end of branch pipe 7 is coaxially fixedly connected with the inlet end of outer sleeve 4, and the outer diameter of branch pipe 7 matches the inner diameter of outer sleeve 4.

[0041] When the number of branch pipes 7 is one, the main exhaust duct 1 is arranged above the suspended ceiling to improve the aesthetics, and the branch pipe 7 passes through the suspended ceiling and is arranged at the top of the kitchen to achieve effective exhaust at the top of the kitchen.

[0042] Embodiment 3:

[0043] refer to Figures 4 to 5 The difference between this embodiment and embodiment 1 is that when there are multiple branch pipes 7, the air outlet ends of the multiple branch pipes 7 are arranged in the outer sleeve 4, each branch pipe 7 is fixedly connected to the outer sleeve 4, and the joints between the multiple branch pipes 7 and the outer sleeve 4 are filled with sealing foam glue.

[0044] When there are multiple branch pipes 7, multiple branch pipes 7 are buried above the suspended ceiling of each room, and the air inlet end of each branch pipe 7 is set in each corresponding room below the suspended ceiling, and the air outlet ends of multiple branch pipes 7 are simultaneously set in the outer sleeve 4, and each branch pipe 7 is fixed by the outer sleeve 4, and sealing foam glue is filled at the joints. The length and diameter of each branch pipe 7 are different, which can be specifically set according to the actual situation on site. At the same time, the flow control valve 8 installed on each branch pipe 7 is coordinated to control the pipe diameter, length and opening of the branch pipe 7, so that the exhaust speed of each branch pipe 7 is consistent.

[0045] Embodiment 4:

[0046] refer to Figure 6 The difference between this embodiment and embodiment 1 is that the end of the main exhaust duct 1 is rotatably connected to one side of the centrifugal impeller 10, and the side of the centrifugal impeller 10 away from the main exhaust duct 1 is coaxially fixed with a non-powered wind hood 9, the axis of the centrifugal impeller 10 is fixedly connected to one end of a transmission shaft 13, and the other end of the transmission shaft 13 is axially connected to an exhaust fan 16, and the exhaust fan 16 is arranged in the air outlet end of the secondary exhaust duct 2, and the middle part of the transmission shaft 13 is rotatably connected to a sleeve 15, and the outer circumferential direction of the sleeve 15 is evenly fixed with mounting rods 14, and the mounting rod 14 is fixed to the inner wall of the air outlet end of the secondary exhaust duct 2, and the air outlet end of the main exhaust duct 1 is rotatably connected to a rotating ring 11 through a plurality of circumferentially evenly arranged balls 12, and the rotating ring 11 is coaxially fixed to the centrifugal impeller 10.

[0047] During use, when the range hood 5 is started, smoke is discharged to the outside of the building through the centrifugal impeller 10 . The smoke discharge causes the centrifugal impeller 10 to rotate, driving the transmission shaft 13 to rotate the exhaust fan 16 to exhaust the air in the secondary exhaust duct 2 .

[0048] When the range hood 5 is not started, the wind drives the non-powered hood 9 to rotate, causing the centrifugal impeller 10 and the transmission shaft 13 to rotate simultaneously, thereby driving the exhaust fan 16 to exhaust the air in the secondary exhaust duct 2.

[0049] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" 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 invention, 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 should not be understood as a limitation on the present invention.

[0050] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. Secondary smoke exhaust device, It is characterized in that include: A main exhaust duct (1), one end of the main exhaust duct (1) protruding from the building and connected to a windproof air extraction hood (3), and the other end of the main exhaust duct (1) connected to the air outlet end of the range hood (5) via a connecting hose (6); A secondary exhaust duct (2) is arranged inside the main exhaust duct (1); an air outlet end of the secondary exhaust duct (2) is arranged inside the main exhaust duct (1); the air outlet end of the secondary exhaust duct (2) is arranged toward the windproof air extraction hood (3); an air inlet end of the secondary exhaust duct (2) extends out of the side wall of the main exhaust duct (1); the air inlet end of the secondary exhaust duct (2) is connected to an outer sleeve (4); a plurality of air inlet parts are arranged inside the outer sleeve (4); the outer sleeve (4) is connected to an air outlet end of the air inlet part; and the air inlet end of the air inlet part is located at the top of the room.

2. The secondary smoke exhaust device according to claim 1, Features: The air inlet portion comprises a branch pipe (7), the air inlet end of the branch pipe (7) is located at the top of the room, the air outlet end of the branch pipe (7) is located in the outer casing (4), and the branch pipe (7) is fixedly connected to and communicated with the outer casing (4); The middle part of the branch pipe (7) is connected to a flow control valve (8) for adjusting the air flow.

3. The secondary smoke exhaust device according to claim 1, Features: The secondary exhaust pipe (2) is an L-shaped structure.

4. The secondary smoke exhaust device according to claim 1, Features: The gas outlet end of the secondary exhaust pipe (2) is coaxially arranged with the main exhaust pipe (1).

5. The secondary smoke exhaust device according to claim 1, Features: The inner diameter of the main exhaust pipe (1) is twice the outer diameter of the secondary exhaust pipe (2).

6. The secondary smoke exhaust device according to claim 2, Features: When the number of the branch pipe (7) is one, the air outlet end of the branch pipe (7) is coaxially fixedly connected to the air inlet end of the outer sleeve (4), and the outer diameter of the branch pipe (7) matches the inner diameter of the outer sleeve (4).

7. The secondary smoke exhaust device according to claim 2, Features: When there are multiple branch pipes (7), the air outlet ends of the multiple branch pipes (7) are arranged in the outer sleeve (4), each branch pipe (7) is fixedly connected and communicated with the outer sleeve (4), and the joints between the multiple branch pipes (7) and the outer sleeve (4) are filled with sealing foam glue.

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