Smoke exhaust pipe for range hood and oil smoke suction system

Abstract

A smoke exhaust pipe for a range hood and an oil smoke suction system are characterized in that a tubular support is supported in the pipe wall of the smoke exhaust pipe, the length direction of the pipe wall is recorded as the vertical direction, the support comprises an upper end ring and a lower end ring, and the upper end ring and the lower end ring are arranged corresponding to an upper port and a lower port of the pipe wall respectively up and down; the multiple steel wires are arranged at intervals in the circumferential direction of the pipe wall, and all the steel wires incline towards the circumferential direction of the pipe wall from bottom to top, so that all the steel wires are integrally arranged in the clockwise or anticlockwise rotating direction, and a channel defined by all the steel wires is in the form that the inner diameter of the upper end and the inner diameter of the lower end are large, and the inner diameter of the central part is small; meanwhile, the upper ends of the steel wires are sequentially restrained on the upper end ring in the circumferential direction, and the lower ends of the steel wires are sequentially restrained on the lower end ring in the circumferential direction. The overall anti-pressure capability of the support is higher than the anti-tension capability, and the internal stress of the smoke exhaust pipe is mainly pressure stress, so that the support conforms to the stress characteristic of the smoke exhaust pipe and is not easy to damage, and the structural strength of the smoke exhaust pipe is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of kitchen appliances, and particularly relates to an exhaust pipe for a range hood and a range hood system. Background Art

[0002] The existing range hood forms a negative pressure area by the operation of an internal fan system, and the oil fume airflow is discharged outdoors after passing through the range hood and the exhaust pipe under the action of atmospheric pressure.

[0003] Currently, most of the exhaust pipes for range hoods are made of a multi-loop spring steel wire as the skeleton and an aluminum foil covering the shell. Specifically, for example, the Chinese utility model patent "A Spiral Exhaust Duct" with the application number 200620140671.9 and the authorization publication number CN200972018Y, the longitudinal section of its pipe wall is in a wavy shape with wave crests and wave troughs, and a spiral spring steel wire is supported at the wave crest of the pipe wall.

[0004] The existing exhaust pipes are prone to damage after long-term use, and their structural strength needs to be further improved. Content of the Utility Model

[0005] The first technical problem to be solved by the utility model is to provide an exhaust pipe for a range hood aiming at the current situation of the prior art to improve its structural strength.

[0006] The second technical problem to be solved by the utility model is to provide an exhaust pipe for a range hood that helps the oil fume to be discharged.

[0007] The third technical problem to be solved by the utility model is to provide a range hood system with the above exhaust pipe.

[0008] The technical solution adopted by the utility model to solve the above first technical problem is: an exhaust pipe for a range hood, in which a tubular support is supported inside the pipe wall, and the length direction of the pipe wall is defined as the up and down direction. It is characterized in that:

[0009] The support includes:

[0010] An upper end ring and a lower end ring, which are respectively arranged corresponding to the upper and lower ports of the pipe wall, one above the other;

[0011] Multiple steel wires are arranged at intervals along the circumferential direction of the pipe wall, and each steel wire inclines towards the circumferential direction of the pipe wall from bottom to top, so that the overall arrangement of each steel wire is in a clockwise or counterclockwise spiral direction, and the channels formed by each steel wire are in a shape with larger inner diameters at the upper and lower ends and a smaller inner diameter in the central part; at the same time, the upper ends of each steel wire are circumferentially constrained to the upper end ring in sequence, and the lower ends of each steel wire are circumferentially constrained to the lower end ring in sequence.

[0012] In the present utility model, multiple steel wires arranged in a clockwise or counterclockwise spiral direction, together with the cooperation of the upper and lower end rings, make the overall compressive capacity of the bracket stronger than the tensile capacity. Moreover, the internal stress of the exhaust pipe is mainly compressive stress, making the bracket of the present utility model conform to the stress characteristics of the exhaust pipe and not easily damaged, and the structural strength of the exhaust pipe is relatively good.

[0013] Preferably, the steel wires are arranged in parallel.

[0014] To further solve the above-mentioned second technical problem, preferably, the angle between each steel wire and the horizontal plane is 60° to 80°. This can avoid the inner diameter of the central part of the exhaust pipe being too small due to too small an angle, which affects the flow of oil fume, and avoid too large an angle, which affects the overall strength of the exhaust pipe. That is, the present utility model can ensure the structural strength of the exhaust pipe while being beneficial to the discharge of oil fume.

[0015] Preferably, the inner diameters of the upper end ring and the lower end ring are the same, and the centers of the two are aligned and located on the central axis of the pipe wall.

[0016] Furthermore, the diameters of the upper end ring and the lower end ring are 150 - 300 mm, and the ratio of the diameter of the central part of the channel to the diameters of the upper and lower end rings is 7 / 10 - 9 / 10.

[0017] In the above-mentioned various solutions, preferably, the pipe wall is an aluminum foil layer wrapped around the periphery of the bracket, and the shape of the pipe wall matches the shape formed by the multiple steel wires.

[0018] Preferably, the upper ends of the steel wires are constrained to the upper end ring in a manner that can move circumferentially along the upper end ring and can be fixed relative to the upper end ring; the lower ends of the steel wires are constrained to the lower end ring in a manner that can move circumferentially along the lower end ring and can be fixed relative to the lower end ring, so that the inclination angles of the steel wires can be adjusted. The flow areas of the adjusted channels are different to adapt to the amount of oil fume generated during cooking, and thus, on the premise of not affecting the noise, the oil fume can be discharged as quickly as possible.

[0019] In the present utility model, the pipe wall of the exhaust pipe can be made of an elastic material or a flexible material, so as to deform accordingly according to the adjustment of the steel wire angles, and make the pipe wall always fit on the outer ring of the bracket.

[0020] Preferably, a first component that can telescopically move up and down relative to the steel wire is provided at the upper end of each steel wire. The upper end ring is provided with a first annular groove extending circumferentially, and a plurality of first recesses are arranged at intervals along the circumference in the first annular groove for the first components at the upper ends of the steel wires to selectively insert into their respective first recesses. A first protrusion is formed between each adjacent first recess for the contracted first component to cross over; at the same time, a first elastic member acts on each first component, and the first elastic member makes the corresponding first component always have a tendency to extend and insert into the first recess.

[0021] A second component capable of telescoping up and down relative to the steel wire is provided at the lower end of each steel wire. The lower end ring is provided with a second annular groove extending circumferentially, and a plurality of second recesses are provided at intervals along the circumference in the second annular groove for the second components at the lower ends of the respective steel wires to be selectively inserted into their respective second recesses. A second convex portion is formed between each adjacent second recess for the second component after contraction to pass over. At the same time, a second elastic member acts on each second component, and the second elastic member causes the corresponding second component to always have a tendency to elongate and insert into the second recess.

[0022] In this way, the cooperation between the elastic member and the convex portion enables the end of the steel wire to be fixed relative to the end ring. When an external force is applied to overcome the elastic force of the elastic member, the steel wire can be driven to move along the circumference of the end ring. In the present utility model, the steel wire can be manually driven to move.

[0023] The technical solution adopted by the present utility model to solve the above-mentioned third technical problem is as follows: An oil fume suction system includes:

[0024] A box body, which is hollow inside to form a chamber with a smoke inlet and a smoke outlet;

[0025] A fan system, which is arranged in the box body and is used to drive the oil fume airflow to be sucked into the chamber from the smoke inlet and discharged from the smoke outlet;

[0026] It is characterized in that it further has the smoke exhaust pipe as described above, and the lower port of the pipe wall is communicated with the smoke outlet.

[0027] Compared with the prior art, the advantages of the present utility model are as follows: In the present utility model, the cooperation of multiple steel wires arranged in a clockwise or counterclockwise spiral direction and the upper and lower end rings makes the overall compressive capacity of the bracket stronger than the tensile capacity, and the internal stress of the smoke exhaust pipe is mainly compressive stress, so that the bracket of the present utility model conforms to the stress characteristics of the smoke exhaust pipe and is not easily damaged, and the structural strength of the smoke exhaust pipe is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic structural diagram of the oil fume suction system according to Embodiment 1 of the present utility model;

[0029] Figure 2 is a cross-sectional view of the oil fume suction system according to Embodiment 1 of the present utility model;

[0030] Figure 3 is an exploded perspective view of the smoke exhaust pipe according to Embodiment 1 of the present utility model;

[0031] Figure 4 is a schematic structural diagram of the oil fume suction system according to Embodiment 2 of the present utility model;

[0032] Figure 5 is a longitudinal cross-sectional view of the bracket according to Embodiment 2 of the present utility model;

[0033] Figure 6 This is a schematic structural view of the upper end ring in the second embodiment of the present utility model. Detailed implementation manners

[0034] The present utility model will be further described in detail below in conjunction with the embodiments with reference to the drawings.

[0035] Embodiment 1:

[0036] As Figures 1 to 3 shown, this is a first preferred embodiment of an exhaust pipe for a range hood and a range hood system according to the present utility model. The pipe wall 1 of the exhaust pipe is vertically arranged, and a tubular support 2 is supported inside the pipe wall 1.

[0037] Among them, the support 2 includes an upper end ring 21, a lower end ring 22 and a plurality of steel wires 23. The upper end ring 21 and the lower end ring 22 are respectively arranged corresponding to the upper and lower ports of the pipe wall 1, one above the other, and the diameters of the upper end ring 21 and the lower end ring 22 are the same, both being 150 - 300 mm (any value between 150 - 300 mm can be used, such as 150, 200, 250, 300 mm, etc.). The centers of the upper end ring 21 and the lower end ring 22 are aligned and located on the central axis of the pipe wall 1.

[0038] The above-mentioned steel wires 23 are arranged at intervals and in parallel along the circumferential direction of the pipe wall 1, and each steel wire 23 is inclined from bottom to top towards the circumferential direction of the pipe wall 1, so that the overall arrangement of the steel wires 23 is in a clockwise or counterclockwise spiral direction, and the channels formed by the steel wires 23 have a shape with larger inner diameters at the upper and lower ends and a smaller inner diameter in the central part. At the same time, the upper ends of the steel wires 23 are sequentially fixed to the upper end ring 21 along the circumferential direction, and the lower ends of the steel wires 23 are sequentially fixed to the lower end ring 22 along the circumferential direction. In this way, the contour shape formed by the steel wires of the present utility model is a hyperboloid of one sheet, which is beneficial to the smooth passage of oil fume and ensures the structural strength.

[0039] In this embodiment, the angle a between each steel wire 23 and the horizontal plane is 60 - 80° (any value between 60 - 80° can be used, such as 60, 70, 80°, etc.), and the ratio of the diameter of the central part of the channel formed by the steel wires to the diameter of the upper and lower end rings 22 is 7 / 10 - 9 / 10.

[0040] At the same time, the pipe wall 1 of this embodiment is an aluminum foil layer wrapped around the periphery of the support 2, and the shape of the pipe wall 1 matches the shape formed by the plurality of steel wires 23.

[0041] The oil fume suction system of this embodiment includes a box body 3, a fan system, and the above-mentioned exhaust pipe. Among them, the box body 3 is a prior art, and its interior is hollow to form a chamber 30 with a smoke inlet 30a and a smoke outlet 30b. The fan system is an existing centrifugal fan (not shown in the figure) and is arranged inside the box body 3, used to drive the oil fume airflow to be inhaled into the chamber 30 from the smoke inlet 30a and discharged from the smoke outlet 30b. The lower port of the pipe wall 1 of the above-mentioned exhaust pipe is connected to the smoke outlet 30b for the oil fume discharged from the smoke outlet to pass through.

[0042] Embodiment Two:

[0043] As Figures 4 to 6 shown, it is a second preferred embodiment of an exhaust pipe for an oil fume extractor and an oil fume suction system of the present utility model. This embodiment is basically the same as Embodiment One, the difference being that in this embodiment, the upper ends of the respective steel wires 23 are constrained to the upper end ring 21 in a manner that can move circumferentially along the upper end ring 21 and can be fixed relative to the upper end ring 21; the lower ends of the respective steel wires 23 are constrained to the lower end ring 22 in a manner that can move circumferentially along the lower end ring 22 and can be fixed relative to the lower end ring 22, so that the inclination angles of the respective steel wires 23 can be adjusted.

[0044] Specifically, the upper ends of the respective steel wires 23 are provided with a first component 24 that can telescopically move up and down relative to the steel wire 23. The upper end ring 21 is provided with a first annular groove 210 extending circumferentially, and a plurality of first recesses 211 are provided at intervals along the circumference in the first annular groove 210 for the first components 24 at the upper ends of the respective steel wires 23 to selectively insert into their respective first recesses 211. A first protrusion 212 is formed between each adjacent pair of first recesses 211 for the contracted first component 24 to pass over; at the same time, a spring extending up and down acts on each first component 24 as a first elastic member, and the first elastic member causes the corresponding first component 24 to always have a tendency to elongate and insert into the first recess 211.

[0045] The lower ends of the respective steel wires 23 are provided with a second component 25 that can telescopically move up and down relative to the steel wire 23. The lower end ring 22 is provided with a second annular groove 220 extending circumferentially, and a plurality of second recesses 221 are provided at intervals along the circumference in the second annular groove 220 for the second components 25 at the lower ends of the respective steel wires 23 to selectively insert into their respective second recesses 221. A second protrusion 222 is formed between each adjacent pair of second recesses 221 for the contracted second component 25 to pass over; at the same time, a spring acts on each second component 25 as a second elastic member, and the second elastic member causes the corresponding second component 25 to always have a tendency to elongate and insert into the second recess 221.

[0046] In this way, the upper and lower ends of the respective steel wires 23 can be moved in opposite directions as needed, and thus the radial dimension of the channel can be adjusted.

[0047] In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present utility model. However, these terms are used herein only for the purpose of convenience in description and are determined based on the exemplary orientations shown in the drawings. Since the embodiments disclosed in the present utility model can be arranged in different directions, these terms indicating directions are used only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity.

[0048] In the description and claims of the present utility model, the term "vertical" is also used, which means substantially along the up and down direction, not limited to just the vertical direction, and can also be slightly inclined relative to the vertical direction.

[0049] In the description and claims of the present utility model, the term "radial" is also used, which means substantially along the inside and outside direction, not limited to just the radial direction passing through the center of the circle, and can also be slightly inclined relative to the radial direction.

Claims

1. A smoke exhaust pipe for a range hood, wherein a tubular bracket (2) is supported inside the pipe wall (1), and the length direction of the pipe wall (1) is the up-down direction, and the characteristics are: The support (2) comprises: An upper end ring (21) and a lower end ring (22) are arranged one above the other and one below the other, respectively corresponding to the upper and lower ports of the tube wall (1); A plurality of steel wires (23) are arranged at intervals along the circumference of the tube wall (1), and each steel wire (23) is inclined from bottom to top toward the circumference of the tube wall (1), so that each steel wire (23) is arranged in a clockwise or counterclockwise rotation direction as a whole, and the channel surrounded by each steel wire (23) is in a form with a large inner diameter at the upper and lower ends and a small inner diameter in the central part; at the same time, the upper end of each steel wire (23) is sequentially constrained in the circumferential direction to the upper end ring (21), and the lower end of each steel wire (23) is sequentially constrained in the circumferential direction to the lower end ring (22).

2. The smoke exhaust pipe according to claim 1, characterized in that: The steel wires (23) are arranged in parallel.

3. The smoke exhaust pipe according to claim 2, characterized in that: The angle between each steel wire (23) and the horizontal plane is 60-80°.

4. The smoke exhaust pipe according to claim 1, characterized in that: The inner diameters of the upper end ring (21) and the lower end ring (22) are consistent, and the centers of the two are aligned and located on the central axis of the tube wall (1).

5. The smoke exhaust pipe according to claim 4, characterized in that: The diameters of the upper end ring (21) and the lower end ring (22) are 150 to 300 mm, and the ratio of the diameter of the central part of the channel to the diameters of the upper and lower end rings (22) is 7 / 10 to 9 / 10.

6. The smoke exhaust pipe according to any one of claims 1 to 5, characterized in that: The tube wall (1) is an aluminum foil layer wrapped around the outer periphery of the bracket (2), and the shape of the tube wall (1) matches the shape formed by the multiple steel wires (23).

7. The smoke exhaust pipe according to any one of claims 1 to 5, characterized in that: The upper end of each steel wire (23) is constrained to the upper end ring (21) in a manner that it can move along the circumference of the upper end ring (21) and can be fixed relative to the upper end ring (21); the lower end of each steel wire (23) is constrained to the lower end ring (22) in a manner that it can move along the circumference of the lower end ring (22) and can be fixed relative to the lower end ring (22), so that the inclination angle of each steel wire (23) can be adjusted.

8. The smoke exhaust pipe according to claim 7, characterized in that: The upper end of each steel wire (23) is provided with a first component (24) that can be extended and retracted relative to the steel wire up and down, the upper end ring (21) is provided with a first annular groove (210) extending in the circumferential direction, and a plurality of first recesses (211) are provided in the first annular groove (210) at intervals along the circumferential direction, so that the first component (24) at the upper end of each steel wire (23) can be selectively inserted into the respective first recesses (211), and a first convex portion (212) is formed between each adjacent first recess (211) so that the first component (24) after contraction can pass over; at the same time, each first component (24) is acted on with a first elastic component, and the first elastic component enables the corresponding first component (24) to always have a tendency to stretch and be inserted into the first recess (211); The lower end of each steel wire (23) is provided with a second component (25) that can be extended and retracted relative to the steel wire up and down, the lower end ring (22) is provided with a second annular groove (220) extending in the circumferential direction, and a plurality of second recesses (221) are arranged in the second annular groove (220) at intervals along the circumferential direction, so that the second component (25) at the lower end of each steel wire (23) can be selectively inserted into the respective second recesses (221), and a second convex portion (222) is formed between each adjacent second recesses (221) so that the second component (25) after contraction can pass over; at the same time, each second component (25) is acted on with a second elastic component, and the second elastic component makes the corresponding second component (25) always have a tendency to stretch and be inserted into the second recess (221).

9. A fume extraction system, comprising: The box body (3) is hollow inside to form a chamber (30) with a smoke inlet (30a) and a smoke outlet (30b); A fan system is disposed in the box (3) and is used to drive the oil smoke flow to be sucked into the chamber (30) through the smoke inlet (30a) and discharged through the smoke outlet (30b); Features It also comprises a smoke exhaust pipe as claimed in any one of claims 1 to 8, wherein the lower end of the pipe wall (1) is connected to the smoke outlet (30b).

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