Anti-backflow flue
By setting up a diversion assembly and a wind guide bucket in the air guide bucket of the flue system, the problems of poor smoke exhaust and oil smoke overflow caused by vortex and air curtain during the flue gas emission process are solved, and the smooth emission and pressure control of the flue gas are achieved.
Patent Information
- Application Number
- CN202420210831.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-29
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-01-29
AI Technical Summary
In existing flue systems, flue gases are prone to form vortex and air curtains during the discharge process, resulting in poor smoke exhaust, increasing pressure in the flue, and may cause the problem of oil smoke backflow.
A flue anti-injection flue is designed. By setting up a diverting assembly in the air guide bucket, two deflectors in opposite directions are used to guide the flue gas to both sides, thereby preventing the flue gas from converging into a vortex and an air curtain, and a wind guide bucket and oil drain tank are set up to prevent the oil smoke from pouring out.
It effectively prevents the increase in the pressure in the flue and the oil smoke from falling off, ensures the smooth discharge of flue gas, and avoids the formation of vortex and air curtain.
Smart Images
Figure CN222862790U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flues, in particular to a backflow prevention flue. Background Art
[0002] In the prior art, when residential buildings are constructed, a main ventilation flue that runs from top to bottom is usually required. The kitchen flues of each household are directly connected to the main ventilation flue and discharged to the outside through the main ventilation flue; therefore, the flues of each household are actually interconnected.
[0003] When the smoke is discharged into the flue, if it meets the smoke discharged upward from the lower layer, vortices and air curtains may be formed. This situation usually leads to poor smoke exhaust, increases the pressure in the flue, and may even cause problems such as oil fume backflow. In order to solve the above problems, we propose an anti-backflow flue. Utility Model Content
[0004] The utility model aims to provide a backflow prevention flue to solve the problems that vortex and air curtain are formed in the flue, resulting in increased pressure in the flue and even causing backflow of oil smoke.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a backflow prevention flue, including a ventilation flue, the side wall of the ventilation flue is provided with a smoke exhaust port, the outer cover of the smoke exhaust port is provided with an air guide scoop, the smoke exhaust port and the air guide scoop form an air duct with an upward opening, and a diversion component is provided at the opening of the air guide scoop for diverting the smoke entering the ventilation flue.
[0006] According to the above technical solution, the diversion assembly includes two guide plates inclined in opposite directions, which are used to guide the smoke to two separate directions.
[0007] According to the above technical solution, a shaft rod is fixedly connected inside the air guide scoop, the two guide plates are hinged to the shaft rod, and elastic members are connected between the two guide plates and the shaft rod.
[0008] According to the above technical solution, the side wall of the ventilation flue is provided with a limit block for limiting the swing angle of the guide plate.
[0009] According to the above technical solution, the bottom of the air guide scoop is tilted, an oil drain groove is formed between the bottom of the air guide scoop and the side wall, and an oil drain hole is provided at the bottom of the oil drain groove.
[0010] According to the above technical solution, the diverter assembly is tiltedly arranged in the air guide scoop, and the inner side wall of the air guide scoop connected to the diverter assembly is provided with an oil guide groove, and the oil guide groove is connected to the oil drain groove.
[0011] According to the above technical solution, an oil drain pipe is fixedly connected to the outer wall of the lower end of the air guide scoop, the oil drain pipe is connected to the oil drain hole, and the oil drain pipe is inclined in a direction away from the air guide scoop.
[0012] Compared with the prior art, the beneficial effects of the utility model are:
[0013] The utility model provides a flow diversion component in the air guide scoop. When the smoke is discharged into the ventilation flue, the smoke will flow upward along the wind duct, push the two guide plates to open, and under the restriction of the limit block, the two guide plates are tilted in opposite directions to guide the smoke into two mutually separated directions, so that the smoke discharged through the wind duct of each household is blown out obliquely to both sides of the ventilation flue, preventing the smoke discharged upward from the lower layer from merging with the smoke discharged from the upper layer to form a vortex and an air curtain, resulting in the phenomenon of oil smoke backflow.
[0014] The utility model is provided with an air guide scoop, which can prevent the oil smoke from flowing back due to the increase of air pressure in the ventilation duct when other residents exhaust smoke into the ventilation duct through range hoods, and is equipped with a diversion component. The torsion force of the torsion spring will push the two guide plates to rotate in opposite directions, so that the two guide plates can block the air duct to the greatest extent, further preventing the oil smoke from flowing back due to the increase of air pressure in the ventilation duct. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the interior of the air guide scoop of the utility model;
[0016] Figure 2 It is a half-section diagram of the anti-backflow flue of the utility model;
[0017] Figure 3 It is an overall schematic diagram of the air guide scoop of the utility model;
[0018] Figure 4 It is a top view of the air guide scoop of the utility model;
[0019] Figure 5 It is a side view inside the air guide scoop of the utility model.
[0020] In the figure: 1. ventilation flue; 2. smoke exhaust port; 3. air guide scoop; 4. diversion assembly; 41. guide plate; 42. elastic member; 43. limit block; 44. shaft rod; 5. oil drain pipe; 6. oil guide groove. DETAILED DESCRIPTION
[0021] 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.
[0022] See also Figure 1-5 The utility model provides a technical solution: an anti-backflow flue, including a ventilation flue 1, the ventilation flue 1 is a rectangular cylindrical structure, each household is provided with a ventilation flue 1, and a plurality of ventilation flues 1 are connected to form a total ventilation flue, the side wall of the ventilation flue 1 is provided with a smoke exhaust port 2, and the outer cover of the smoke exhaust port 2 is provided with an air guide scoop 3, the smoke exhaust port 2 and the air guide scoop 3 form an air duct with an upward opening, and the smoke entering the ventilation flue 1 through the smoke exhaust port 2 will be discharged along the air duct. When other residents exhaust smoke into the ventilation flue 1 through the range hood, the air pressure in the ventilation flue 1 will increase, and the air guide scoop 3 can prevent the increase of the air pressure in the ventilation flue 1 and the occurrence of oil smoke backflow.
[0023] A diversion component 4 is provided at the opening of the air guide scoop 3, which is used to divert the smoke entering the ventilation flue 1, so that the smoke discharged from each household through the air duct is blown out obliquely to both sides of the ventilation flue 1, preventing the smoke discharged upward from the lower layer from merging with the smoke discharged from the upper layer to form a vortex and an air curtain, causing the occurrence of problems such as oil fume backflow.
[0024] Specifically, the diversion component 4 includes two guide plates 41 inclined in opposite directions, which are used to guide the smoke in two separate directions, so that the smoke discharged from each household through the air duct is blown out obliquely to both sides of the ventilation flue 1, preventing the smoke discharged upward from the lower layer from merging with the smoke discharged from the upper layer to form a vortex and an air curtain, and also preventing the increase of air pressure in the ventilation flue 1, which affects the air guide scoop 3 and prevents the backflow of oil smoke.
[0025] Specifically, a shaft 44 is fixedly connected to the air guide scoop 3, one end of the shaft 44 is fixed to the inner wall of the ventilation flue 1, and the other end is fixed to the inner wall of the air guide scoop 3. The two guide plates 41 are rotatably connected to the shaft 44, and an elastic member 42 is connected between the two guide plates 41 and the shaft 44. The elastic member 42 is a torsion spring, which is sleeved on the outer wall of the shaft 44, one end of the torsion spring is fixed to the inner wall of the ventilation flue 1, and the other end of the torsion spring is fixed to the guide plate 41. Under normal conditions (i.e., when the flue gas is not exhausted), the torsion force of the torsion spring will push the two guide plates 41 to rotate in opposite directions, so that the two guide plates 41 can block the air duct to the greatest extent, further preventing the increase of air pressure in the ventilation flue 1, affecting the air guide scoop 3, and preventing oil smoke from flowing back.
[0026] Specifically, the side wall of the ventilation flue 1 is provided with a limit block 43 for limiting the swing angle of the guide plate 41; when the smoke is discharged through the smoke exhaust port 2, the smoke will push the two guide plates 41 to open, and under the restriction of the limit block 43, the two guide plates 41 are tilted in opposite directions, so as to facilitate guiding the smoke in two separate directions.
[0027] Specifically, the bottom of the air guide scoop 3 is tilted, and an oil drain groove is formed between the bottom of the air guide scoop 3 and the side wall. The oil smoke entering the ventilation flue 1 will be deposited in the ventilation flue 1 to form oil stains. The oil stains can flow into the oil drain groove along the bottom of the tilted air guide scoop 3. An oil drain hole is provided at the bottom of the oil drain groove. The oil stains flowing into the oil drain groove can be discharged from the air guide scoop 3 through the oil drain hole.
[0028] Specifically, the diverter component 4 is tilted inside the air guide scoop 3 to facilitate the oil stains falling on the diverter component 4 to flow to one side. The inner wall connecting the air guide scoop 3 and the diverter component 4 is provided with an oil guide groove 6, and the oil guide groove 6 is connected to the oil drain groove. The oil stains flowing downward from the diverter component 4 can flow into the oil drain groove through the oil guide groove 6, gather, and be discharged.
[0029] Specifically, an oil drain pipe 5 is fixedly connected to the outer wall of the lower end of the air guide scoop 3 , the oil drain pipe 5 is connected to the oil drain hole, and the oil drain pipe 5 is inclined away from the air guide scoop 3 to prevent the oil from the upper layer from flowing into the lower air guide scoop 3 .
[0030] Working principle:
[0031] When the smoke is discharged into the ventilation flue 1 through the smoke exhaust port 2, the smoke will flow upward along the air duct, and the smoke will push the two guide plates 41 to open. Under the restriction of the limit block 43, the two guide plates 41 are tilted in opposite directions to guide the smoke in two separate directions, so that the smoke exhausted through the air duct of each household is blown out obliquely to both sides of the ventilation flue 1, preventing the smoke discharged upward from the lower layer from merging with the smoke discharged from the upper layer to form a vortex and an air curtain, resulting in the phenomenon of oil smoke backflow.
[0032] When smoke is not exhausted, the torsion force of the torsion spring will push the two guide plates 41 to rotate in opposite directions, so that the two guide plates 41 can block the air duct to the greatest extent, and cooperate with the air guide scoop 3. When other residents exhaust smoke into the ventilation flue 1 through the range hood, the increase of air pressure in the ventilation flue 1 and the backflow of oil smoke can be prevented.
[0033] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0034] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A backflow prevention flue, characterized in that: The invention comprises a ventilation flue (1), wherein a smoke exhaust port (2) is provided on a side wall of the ventilation flue (1), an air guide scoop (3) is provided on an outer cover of the smoke exhaust port (2), the smoke exhaust port (2) and the air guide scoop (3) form an air duct with an opening facing upward, and a flow diversion component (4) is provided at the opening of the air guide scoop (3) for diverting smoke entering the ventilation flue (1); The flow diversion assembly (4) comprises two guide plates (41) inclined in opposite directions, and used for directing the smoke into two directions separated from each other; A shaft rod (44) is fixedly connected inside the air guide scoop (3), the two guide plates (41) are rotatably connected to the shaft rod (44), and an elastic member (42) is connected between the two guide plates (41) and the shaft rod (44).
2. The backflow prevention flue according to claim 1, characterized in that: A limit block (43) for limiting the swing angle of the guide plate (41) is provided on the side wall of the ventilation flue (1).
3. The backflow prevention flue according to claim 1, characterized in that: The bottom of the air guide scoop (3) is arranged at an angle, an oil drainage groove is formed between the bottom of the air guide scoop (3) and the side wall, and an oil drainage hole is provided at the bottom of the oil drainage groove.
4. The backflow prevention flue according to claim 3, characterized in that: The flow diversion component (4) is arranged obliquely in the air guide scoop (3); an inner side wall of the air guide scoop (3) connected to the flow diversion component (4) is provided with an oil guide groove (6); the oil guide groove (6) is communicated with the oil drain groove.
5. The backflow prevention flue according to claim 3, characterized in that: An oil drain pipe (5) is fixedly connected to the outer wall of the lower end of the air guide scoop (3), the oil drain pipe (5) is connected to the oil drain hole, and the oil drain pipe (5) is arranged to be inclined in a direction away from the air guide scoop (3).