A building oil fume duct that is easy to clean

Abstract

The present application relates to a building oil fume duct that is easy to clean, belonging to the field of sustainable buildings, which includes an oil fume duct, the length direction of which is vertical, and a cleaning mechanism is provided in the oil fume duct, the cleaning mechanism includes a cleaning pipe, the cleaning pipe is connected to the inner wall of the oil fume duct, and a cleaning hole is opened on the pipe wall of the cleaning pipe, and the cleaning hole faces the inner wall of the oil fume duct. The present application can clean the oil fume on the inner wall of the oil fume duct through the cleaning mechanism, thereby improving the cleanliness of the inside of the oil fume duct and reducing various safety hazards caused by oil pollution.

Description

Technical Field

[0001] The present application relates to the field of sustainable building structures, and in particular to a building oil fume duct that is easy to clean. Background Art

[0002] The concept of sustainable development in architecture aims to illustrate the responsibility of the construction industry in achieving sustainable development. It refers to buildings planned with a sustainable development perspective, ranging from building materials, buildings, urban area size, to related functional, economic, social, cultural and ecological factors.

[0003] For residential buildings, sustainability means saving energy, making effective and rational use of natural resources, achieving continuous and efficient use of all resources, pursuing minimal ecological conflicts and optimal resource utilization, meeting the goals of saving land, water, energy, improving the ecological environment, reducing environmental pollution, and extending the life of buildings, and forming an ideal place for human beings to live with sustainable development of society, economy, and nature. The main directions include the sustainability of building functions, the sustainability of construction, and the sustainability of the environment.

[0004] In terms of environmental sustainability, the rational emission of harmful and pollutant gases in residential buildings is one of the issues that residents and building builders are particularly concerned about. Most of the current high-rise residential buildings are equipped with kitchen fume ducts, and the range hoods of each household discharge the fumes into the building fume duct and then discharge them out of the building as a whole.

[0005] The oil exhaust pipe of the range hood has a good structural design for preventing and removing oil stains. However, after the oil smoke enters the oil smoke passage of the building, it needs to go through a long path to reach the passage opening at the top of the building. During this process, the oil smoke is constantly in contact with the inner wall of the oil smoke passage, which easily causes oil stains to adhere to the inner wall of the oil smoke passage. The exhaust pipe is basically a small and relatively closed space, and the oil stains on its inner wall are not easy to clean, which brings certain damage and hidden dangers to the environmental protection and safety of the building structure. Summary of the invention

[0006] In order to improve the above problems, the present application provides a building oil fume duct that is easy to clean.

[0007] The application provides a building oil fume duct that is easy to clean, which adopts the following technical solution:

[0008] A building oil fume duct that is easy to clean, wherein an oil fume duct is opened on a building, the length direction of the oil fume duct is vertical, a cleaning mechanism is arranged in the oil fume duct, the cleaning mechanism comprises a cleaning pipe, the cleaning pipe is connected to the inner wall of the oil fume duct, a cleaning hole is opened on the pipe wall of the cleaning pipe, and the cleaning hole faces the inner wall of the oil fume duct.

[0009] By adopting the above technical solution, people can inject cleaning liquid into the tube from the mouth of the cleaning tube. The cleaning liquid flows to the inner wall of the oil fume channel through the injection hole and the cleaning hole in turn to flush the oil stains attached to the inner wall, thereby improving the cleanliness of the inside of the oil fume channel.

[0010] Preferably, the cleaning tube is fixedly connected to the inner wall of the oil fume passage, and the cleaning mechanism also includes an adjustment tube, which is located inside the cleaning tube, and the outer wall of the adjustment tube is in contact with the inner wall of the cleaning tube. A plurality of injection holes are opened on the adjustment tube, and a plurality of the injection holes are arranged along the length direction of the adjustment tube, and a plurality of the injection holes are staggeredly arranged along the circumference of the adjustment tube.

[0011] By adopting the above technical solution, when the relative angle between the adjustment tube and the cleaning tube is fixed, only one injection hole is connected to the cleaning hole, and the cleaning liquid can be sequentially rushed to the inner wall of the oil fume channel through the injection hole and the cleaning hole to clean the oil stains on the inner wall, thereby ensuring the hydraulic consistency of the liquid sprayed from the cleaning holes at different heights to a certain extent.

[0012] Preferably, the cross-section of the oil fume channel is rectangular, the number of the cleaning tubes is consistent with the number of edges of the inner wall of the oil fume channel, a single cleaning tube is located at a corner of the oil fume channel and the length directions of the two are consistent, the length direction of the intercepting roll plate is consistent with the length direction of the cleaning tube, the bending direction of the intercepting roll plate is perpendicular to its own length direction, and the opening direction of the cleaning hole on the cleaning tube is inclined toward the intercepting roll plate.

[0013] Preferably, a pressure relief hole is provided on the intercepting roll plate, and the axis of the pressure relief hole is parallel to the wall surface of the inner wall of the oil fume passage where the intercepting roll plate is located.

[0014] By adopting the above technical solution, the intercepting coil plate and the pressure relief hole are used to reduce the flow tendency of the oncoming liquid and reduce the splashing caused by the liquid rushing to the inner wall of the oil fume channel on the other side.

[0015] Preferably, a plurality of water diversion supporting edges are fixedly connected to the inner wall of the oil fume channel, and one end of the water diversion supporting edge along the water flow direction is inclined downward.

[0016] By adopting the above technical solution, the liquid on the inner wall of a certain layer of the oil fume channel can naturally flow into the water guide edge and flow along the water guide edge to the edge of the inner wall of the oil fume channel, thereby reducing the occurrence of cleaning liquid directly flowing on the non-wall edge.

[0017] Preferably, a drain outlet is provided on the building and on the bottom wall of the oil fume passage, the bottom end of the cleaning pipe is fixedly connected to the bottom wall of the oil fume passage, and a drainage hole is provided on the side wall of the cleaning pipe near the bottom end.

[0018] By adopting the above technical solution, the adjustment pipe is raised, the lower pipe opening of the adjustment pipe is connected with the drainage hole, and the residual liquid in the adjustment pipe flows out of the cleaning pipe under the action of gravity.

[0019] Preferably, a plurality of adjusting wedges are fixedly connected to the top end surface of the cleaning tube, the adjusting wedges are arranged in an axial array along the cleaning tube, and the wedge surfaces of the adjusting wedges are in the same direction as the circumferential direction of the cleaning tube; an adjusting wing is coaxially fixedly connected to the top end of the adjusting tube, the radial dimension of the adjusting wing is larger than the radial dimension of the adjusting tube, and a side of the adjusting wing facing the cleaning tube is fixedly connected with a number of transition wedges that is the same as the number of the adjusting wedges, the wedge surfaces of the transition wedges are in opposite directions to the wedge surfaces of the adjusting wedges, and a plurality of the transition wedges are arranged in a circumferential array along the adjusting tube.

[0020] Preferably, an adjustment roller is rotatably connected to the transition wedge block, and the adjustment roller rolls in contact with the adjustment wedge platform.

[0021] By adopting the above technical solution, a transition wedge block is placed between two adjacent adjusting wedge platforms. In this state, the angular position of the adjusting tube relative to the cleaning tube can be determined, a certain injection hole is stably connected with the cleaning hole, and when rotating, the mutual abutment and rolling of the wedge surface and the adjusting roller facilitates the lifting of the adjusting tube.

[0022] Preferably, a placement groove for placing the adjustment roller is provided on a side of the adjustment wedge away from the cleaning tube.

[0023] By adopting the above technical solution, when the liquid in the adjustment tube needs to be discharged as a whole, the adjustment roller is sunk into the placement groove, the relative position of the adjustment wedge and the transition wedge is not easy to change, and the drainage process can also be carried out stably.

[0024] Preferably, a closing cap is threadedly connected to the top end of the cleaning tube.

[0025] By adopting the above technical solution, after the cleaning work of the inner wall of the oil fume channel is completed, the adjustment tube is rotated until no injection hole is connected to the cleaning hole, and the closing cover is tightened to close the cleaning tube and the adjustment tube.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Through the setting of the cleaning mechanism, people can inject the cleaning liquid with pressure from the top of the cleaning tube into the adjusting tube. The cleaning liquid flows to the inner wall of the oil fume channel through the injection hole and the cleaning hole in turn to flush the oil stains attached to the inner wall. The cleaning work can be achieved without the operator directly or indirectly reaching into the oil fume channel to operate, thereby improving the cleanliness of the inside of the oil fume channel;

[0028] 2. Through the setting of the drainage hole, the adjustment wedge and the transition wedge, each time the adjustment tube is rotated by an angle, it is forced to lift one end upward. During the lifting process, the bottom end of the adjustment tube rises, and the inner cavity of the adjustment tube is connected with the drainage hole. The water in the adjustment tube flows out of the adjustment tube with gravity, thereby improving the cleanliness of the new injection of cleaning fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the external structure of a building used to reflect the embodiment of the present application.

[0030] Figure 2 It is a structural schematic diagram of a building fume duct that is easy to clean in an embodiment of the present application.

[0031] Figure 3 It is a cross-sectional schematic diagram used to illustrate the arrangement of the cleaning mechanism in the embodiment of the present application.

[0032] Figure 4 It is a structural schematic diagram used to reflect the water diversion support rib and interception coil in the embodiment of the present application.

[0033] Figure 5 It is a schematic diagram of the matching structure of the cleaning tube and the adjustment tube in the embodiment of the present application.

[0034] Figure 6 yes Figure 2 A partial enlarged view of part B in the middle.

[0035] Figure 7 yes Figure 1 A partial enlarged view of part A in the middle.

[0036] Figure 8 It is a schematic diagram used to reflect the position of the bottom end of the adjustment tube when the transition wedge block is located above the adjustment wedge platform in the embodiment of the present application.

[0037] Explanation of the reference numerals in the accompanying drawings: 1. Building; 11. Drain; 2. Fume channel; 21. Water guide rib; 22. Raised block; 221. Exhaust port; 3. Cleaning mechanism; 31. Cleaning pipe; 311. Cleaning hole; 3111. Pressurization rubber strip; 312. Drain hole; 32. Adjustment pipe; 321. Injection hole; 33. Intercepting roll; 331. Pressure relief hole; 34. Adjustment wing edge; 341. Transition wedge block; 342. Adjustment roller; 35. Adjustment wedge platform; 351. Placement slot; 4. Closing cover. DETAILED DESCRIPTION

[0038] The following is combined with Figure 1-8 This application is described in further detail.

[0039] The present application embodiment discloses a building oil fume duct which is easy to clean, such as Figure 1 and2 As shown, a building 1 is provided with an oil fume duct 2, the length direction of the oil fume duct 2 is the height direction of the building 1, and the ends of the oil fume duct 2 of the kitchens of the residents on each floor extend into the oil fume duct 2. A cleaning mechanism 3 is provided in the oil fume duct 2, and the cleaning mechanism 3 is used to clean the inner wall of the oil fume duct 2 for oil stains.

[0040] like Figure 2 , 3 As shown in 4, the cleaning mechanism 3 includes a cleaning tube 31 and an adjusting tube 32, both of which are circular tubes. In the present embodiment, the cross-section of the oil fume passage 2 is square, and there are four cleaning tubes 31 and four adjusting tubes 32. The four cleaning tubes 31 are respectively located at the four corner edges of the oil fume passage 2 and are fixedly connected to the inner wall surface of the oil fume passage 2. The adjusting tube 32 is coaxially penetrated in the cleaning tube 31, and the outer wall of the adjusting tube 32 is in contact with the inner wall of the cleaning tube 31, that is, the adjusting tube 32 can move axially and circumferentially along the cleaning tube 31. The length direction of the cleaning tube 31 is consistent with the depth direction of the oil fume passage 2. The bottom end of the cleaning tube 31 abuts against the bottom inner wall of the oil fume passage 2, and the top end extends out of the top of the building 1. The top end of the adjustment tube 32 extends out of the top pipe opening of the cleaning tube 31. An adjustment wing 34 is integrally formed on the top outer wall of the adjustment tube 32. The adjustment wing 34 is annular, and its outer diameter is consistent with the outer diameter of the cleaning tube 31. The existence of the adjustment wing 34 can provide convenience for the operator to rotate or move the adjustment tube 32.

[0041] like Figure 3 , 4As shown in Figure 5, the adjustment tube 32 is provided for the operator to inject oil cleaning liquid or water into the inside thereof. A plurality of cleaning holes 311 are provided on the cleaning tube 31. The plurality of cleaning holes 311 are arranged in an array along the length direction of the cleaning tube 31. The cleaning holes 311 are strip-shaped and their length direction is also consistent with the length direction of the cleaning tube 31. The cleaning holes 311 on each single cleaning tube 31 face the inner wall surface of an oil fume passage 2, and the opening direction of the cleaning holes 311 is inclined relative to the inner wall surface of the oil fume passage 2, so that the liquid ejected therefrom has a horizontal movement tendency to flow through the entire wall surface of the oil fume passage 2. The adjustment tube 32 is provided with injection holes 321. The number and shape of the injection holes 321 are consistent with the cleaning holes 311 and the two correspond one to one. In this embodiment, a building 1 has eight floors of residents, and the number of injection holes 321 and cleaning holes 311 are also eight. The injection holes 321 are arranged alternately along the circumference of the adjustment tube 32. In the projection in the vertical direction, the contours of all the cleaning holes 311 overlap with each other, while the contours of all the injection holes 321 have no overlapping parts, that is, when the position state of the adjustment tube 32 is stable, only a certain layer of cleaning holes 311 and injection holes 321 are allowed to be connected to each other. By rotating the adjustment tube 32, the corresponding layer of the two holes can be replaced, thereby achieving that only a certain layer of cleaning tubes 31 always sprays liquid, thereby improving the hydraulic consistency when cleaning the inner walls of the oil fume channel 2 at different heights, and ensuring the cleaning effect of the high-level inner wall surface.

[0042] like Figure 3 and 4 As shown, a pressurized rubber strip 3111 is fixedly connected to the hole wall of the cleaning hole 311, and the pressurized rubber strip 3111 is fixedly bonded to the hole wall of the cleaning hole 311 which is relatively far away from the inner wall of the oil fume channel 2; in a natural state, the pressurized rubber strip 3111 closes the cleaning hole 311, and as the hydraulic pressure in the adjustment tube 32 increases, the liquid will be squeezed out from the gap between the hole wall of the cleaning hole 311 and the pressurized rubber strip 3111 and rush to the inner wall of the oil fume channel 2, thereby achieving flushing of the inner wall of the oil fume channel 2.

[0043] like Figure 3 , 4As shown in Figure 6, an interception roll plate 33 is fixedly connected to the inner wall of the oil fume channel 2 near the corner. The interception roll plate 33 is a long strip curling structure, and the bending direction of the plate surface is perpendicular to its own length direction, and its length direction is consistent with the length direction of the oil fume channel 2. The number of interception roll plates 33 is the same as that of the cleaning tubes 31, and the two correspond one to one. Each interception roll plate 33 and the corresponding cleaning tube 31 are respectively located at the opposite sides of the inner wall of one side of the oil fume channel 2. The cleaning liquid sprayed from the cleaning hole 311 of the cleaning tube 31 passes over the inner wall of one side of the oil fume channel 2 and then reaches the semi-enclosed space formed by the curling of the interception roll plate 33. The curved surface of the interception roll plate 33 has a pressure relief effect on the water flow, so that the water flow almost loses its flow velocity in the horizontal direction, and can only flow to the bottom of the oil fume channel 2 along the length direction of the interception roll plate 33 under the action of gravity. A pressure relief hole 331 is provided on the interception coil 33, and the pressure relief hole 331 connects the two sides of the plate body of the interception coil 33. When the flow rate and flow rate of the cleaning liquid are large enough, large splashes are likely to occur at the interception coil 33, and the existence of the pressure relief hole 331 can further reduce the liquid pressure generated at the interception coil 33 to a certain extent; the liquid passes through the pressure relief hole 331 and crosses the interception coil 33 to reach the gap between the interception coil 33 and the other cleaning pipe 31, flows downward along the wall, and the possibility of long-distance splashes is low.

[0044] like Figure 2 and 4 As shown, a plurality of water guide ribs 21 are integrally formed on the inner wall of the oil fume channel 2. The plurality of water guide ribs 21 are arranged in an array along the length direction of the oil fume channel 2. The number of water guide ribs 21 is seven. One end of each single water guide rib 21 abuts against the cleaning tube 31 and is located between each two adjacent cleaning holes 311. The length direction of the water guide rib 21 is parallel to the inner wall of the oil fume channel 2 where it is located, and the end away from the cleaning tube 31 is tilted downward by 15°-20°. A groove structure is formed between the water guide rib 21 and the inner wall of the oil fume channel 2 where it is located. Liquid on a certain layer of the inner wall of the oil fume channel 2 can naturally flow into the water guide rib 21 and flow along the water guide rib 21 toward the interception coil 33, and finally reach the interception coil 33. In this embodiment, a raised block 22 is fixedly connected to the inner wall surface of the place where the oil fume duct 2 is connected to the kitchen oil fume duct 2 of each household, and an exhaust port 221 is opened on the edge of the upper surface of the raised block 22, and the exhaust port 221 is a channel for oil fume to pass through; the raised blocks 22 of each layer are all located on the inner wall surface of the same surface of the oil fume duct 2, and the number of water diversion supporting ridges 21 on this wall surface is twice the number of water diversion supporting ridges 21 on other single wall surfaces, and there is no cleaning hole 311 between the water diversion supporting ridges 21 closely adjacent to the upper and lower sides of each raised block 22.

[0045] like Figure 2 and 6As shown, a drain port 11 is provided on the bottom wall of the building 1 and located at the oil fume passage 2, and a drainage hole 312 is provided on the side wall of the cleaning pipe 31 near the bottom end. In a natural state, the drainage hole 312 is lower than the bottom end of the adjustment pipe 32, that is, the liquid in the adjustment pipe 32 cannot flow out of the cleaning pipe 31 and the adjustment pipe 32 through the drainage hole 312; when the adjustment pipe 32 is pulled upward for a certain distance so that its bottom end surface is higher than the drainage hole 312, the liquid inside it can flow out from the drainage hole 312 under the action of gravity and enter the drain port 11 to leave the building 1.

[0046] like Figure 5 , 6 As shown in Figure 7, a plurality of adjusting wedges 35 are integrally formed on the top surface of the cleaning tube 31, and the plurality of adjusting wedges 35 are arranged in an axial array along the cleaning tube 31, and the wedge surfaces of the adjusting wedges 35 are in the same direction as the circumferential direction of the cleaning tube 31 (that is, all of them are facing the clockwise side, or all of them are facing the counterclockwise side); a transition wedge 341 having the same number as the adjusting wedge 35 is fixedly connected to the side of the adjusting wing 34 facing the cleaning tube 31, and the plurality of transition wedges 341 are arranged in a circumferential array along the adjusting tube 32, and the wedge surfaces of the transition wedges 341 are facing oppositely to the wedge surfaces of the adjusting wedges 35, and a transition wedge 341 is placed in the gap between each two adjacent adjusting wedges 35, and in this position, the drainage hole 312 is blocked by the wall of the adjusting tube 32. In this embodiment, the number of the adjusting wedge 35 and the transition wedge 341 is nine, that is, the adjusting tube 32 and the cleaning tube 31 have nine different relative angle positions in the circumferential direction to keep the drainage hole 312 closed. Eight of the nine states correspond to eight different pairs of injection holes 321 for the corresponding cleaning holes 311. In the other state, no injection hole 321 is aligned and connected with the cleaning hole 311, that is, at this time, the space inside the adjusting tube 32 and the cleaning tube 31 has no passage directly connected to the inner cavity of the oil fume channel 2.

[0047] like Figure 7 and 8As shown, in the actual operation of injecting cleaning liquid into the adjustment tube 32, the adjustment tube 32 needs to be rotated 40° after each layer of cleaning is completed, so as to facilitate the cleaning of the inner wall of the oil fume channel 2 of the next layer. The lower edge of the wedge surface of the transition wedge 341 is rotatably connected with an adjustment roller 342, and the rotation axis of the adjustment roller 342 is the radial direction of the adjustment tube 32; when the adjustment tube 32 is rotated, the circumference of the adjustment roller 342 rolls against the wedge surface of the adjustment wedge platform 35, thereby improving the smoothness of the rotation operation. When the transition wedge 341 moves to the top of the adjustment wedge platform 35, the bottom end of the adjustment tube 32 is higher than the drainage hole 312, and the liquid in the adjustment tube 32 can flow out from the drainage hole 312. A placement groove 351 for placing the adjustment roller 342 is provided on the side of the adjustment wedge 35 away from the cleaning tube 31. The placement groove 351 is equivalent to setting a step during each rotation of the adjustment tube 32. When the adjustment roller 342 enters the placement groove 351, the resistance to continued rotation or reverse rotation of the adjustment tube 32 increases, making it difficult for the position to change. At this time, the operator can choose to pause the operation to wait for the liquid in the tube to be partially or completely discharged.

[0048] like Figure 1 As shown, an external thread structure is formed on the top outer wall of the cleaning pipe 31, and a closing cap 4 is detachably connected thereto through a thread. After the inner walls of each layer of the oil fume passage 2 are cleaned in sequence, the adjustment pipe 32 is rotated until the non-injection hole 321 is connected to the cleaning hole 311, and the closing cap 4 is tightened to close the cleaning pipe 31 and the adjustment pipe 32.

[0049] The implementation principle of a building oil fume duct that is easy to clean in the embodiment of the present application is as follows:

[0050] The cleaning cycle of the inner wall of the oil fume channel 2 can be set according to the situation. During cleaning, the closing cover 4 is removed, and a cleaning liquid containing detergent is injected into the adjustment tube 32 through a water injection device (a device with a water source, a pump, a tube and other structures), and the inner wall of each layer of the oil fume channel 2 is rinsed and decontaminated in turn. After completing a round of cleaning, the liquid in the adjustment tube 32 is first discharged, and then the above process is repeated again with clean water, thereby completing the cleaning of most of the inner wall surface of the oil fume channel 2. The cleaning liquid and water after cleaning flow into the municipal pipe network system through the drainage hole 312 and the drain port 11.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A building oil fume duct that is easy to clean, wherein an oil fume duct (2) is provided on a building (1), wherein the length direction of the oil fume duct (2) is vertical, and wherein: A cleaning mechanism (3) is provided in the oil fume passage (2), the cleaning mechanism (3) comprising a cleaning tube (31), the cleaning tube (31) being connected to the inner wall of the oil fume passage (2), a cleaning hole (311) being provided on the tube wall of the cleaning tube (31), the cleaning hole (311) facing the inner wall of the oil fume passage (2); The cleaning tube (31) is fixedly connected to the inner wall of the oil fume passage (2); the cleaning mechanism (3) further comprises an adjustment tube (32); the adjustment tube (32) is located inside the cleaning tube (31); the outer wall of the adjustment tube (32) contacts the inner wall of the cleaning tube (31); a plurality of injection holes (321) are provided on the adjustment tube (32); the plurality of injection holes (321) are arranged along the length direction of the adjustment tube (32); and the plurality of injection holes (321) are arranged in a staggered manner along the circumference of the adjustment tube (32); The oil fume channel (2) has a rectangular cross-section. The number of the cleaning tubes (31) is consistent with the number of edges of the inner wall of the oil fume channel (2). A single cleaning tube (31) is located at an edge of the oil fume channel (2) and the length directions of the two are consistent. An interception roll plate (33) is fixedly connected to the inner wall of the oil fume channel (2) and close to the edge. The interception roll plate (33) is a long strip-shaped curled structure. The length direction of the interception roll plate (33) is consistent with the length direction of the cleaning tube (31). The bending direction of the interception roll plate (33) is perpendicular to its own length direction. The number of the interception roll plates (33) is the same as the cleaning tubes (31) and the two correspond one to one. Each interception roll plate (33) and the corresponding cleaning tube (31) are respectively located at opposite sides of the inner wall of a side of the oil fume channel (2). The opening direction of the cleaning hole (311) on the cleaning tube (31) is inclined toward the interception roll plate (33). The intercepting roll plate (33) is provided with a pressure relief hole (331), and the axis of the pressure relief hole (331) is parallel to the inner wall of the oil fume passage (2) where the intercepting roll plate (33) is located; A drain port (11) is provided on the building (1) and on the bottom wall of the oil fume passage (2); the bottom end of the cleaning pipe (31) is fixedly connected to the bottom wall of the oil fume passage (2); and a drainage hole (312) is provided on the side wall of the cleaning pipe (31) near the bottom end; A plurality of adjusting wedge platforms (35) are fixedly connected to the top end surface of the cleaning tube (31), the adjusting wedge platforms (35) are arranged in an array along the axial direction of the cleaning tube (31), and the wedge surfaces of the adjusting wedge platforms (35) are oriented in the same direction as the circumferential direction of the cleaning tube (31); The top end of the adjustment tube (32) is coaxially fixedly connected with an adjustment wing edge (34), the radial dimension of the adjustment wing edge (34) is larger than the radial dimension of the adjustment tube (32), and the side of the adjustment wing edge (34) facing the cleaning tube (31) is fixedly connected with transition wedge blocks (341) whose number is the same as that of the adjustment wedge platform (35), the wedge surface of the transition wedge block (341) faces in the opposite direction to the wedge surface of the adjustment wedge platform (35), and a plurality of the transition wedge blocks (341) are arranged in an array along the circumference of the adjustment tube (32).

2. The easy-to-clean building fume duct according to claim 1, characterized in that: A plurality of water diversion supporting edges (21) are fixedly connected to the inner wall of the oil smoke channel (2), and one end of the water diversion supporting edge (21) along the water flow direction is inclined downward.

3. The easy-to-clean building fume duct according to claim 1, characterized in that: The transition wedge block (341) is rotatably connected to an adjustment roller (342), and the adjustment roller (342) rolls in contact with the adjustment wedge platform (35).

4. The easy-to-clean building fume duct according to claim 3, characterized in that: A placement groove (351) for placing the adjustment roller (342) is provided on one side of the adjustment wedge platform (35) away from the cleaning tube (31).

5. The easy-to-clean building fume duct according to claim 1, characterized in that: The top end of the cleaning tube (31) is threadedly connected with a closing cap (4).

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