CN216788745U

CN216788745U - Fume exhaust fan

Info

Publication number: CN216788745U
Application number: CN202122785094.6U
Authority: CN
Inventors: 黄友根; 王曼; 李斌; 杨伟刚
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-06-21
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a range hood, which comprises a fume collecting hood and a fan frame arranged above the fume collecting hood, wherein a fan system is arranged on the inner side of the fan frame, and the range hood is characterized in that: on the path of the air flow, an auxiliary exhaust device for assisting the oil smoke to be exhausted is further arranged at the downstream of the fan system, and the auxiliary exhaust device comprises a shell and an auxiliary exhaust movable vane arranged in the shell and capable of doing work on the air flow. Compared with the prior art, the utility model has the advantages that: through setting up the row device of helping, utilize the row movable vane of helping can increase the acting capacity to the air current, improve the flow condition in exhaust fume path, promote the oil absorption cigarette effect.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil fume purification device, in particular to a range hood.

Background

The range hood is used as an essential kitchen appliance for each family, and has the functions of sucking oil smoke from an air inlet through an impeller rotating at a high speed in a volute, filtering the oil smoke by using the impeller, and discharging the filtered oil smoke from an air outlet to finish the purification work of kitchen air.

Chinese utility model patent of application number 202120364117.3 discloses a range hood, including organism, purification piece, detection piece and fan, the smoking chamber has in the organism, purification piece connects in the organism to be used for providing the air current of purification to the smoking intracavity, wherein, the air current of purification is configured to be used for reacting and form muddy air current with the material that produces the peculiar smell, detection piece connects in the organism, and a concentration value of the muddy air current in the smoking chamber when detecting the purification, the fan is located the smoking intracavity, the fan is configured to start when the concentration value is greater than the default.

The existing range hood mostly adopts a single-power structure, due to the variability of the use scene, the range of the required working conditions is wide, meanwhile, in order to meet the requirements of different working conditions and resistance, the range of the rotating speed change is also large, the air quantity is large when the range hood is used, the noise is low, the range hood has high efficiency and compact structure, and the single fan type has the requirement of being difficult to use in many times. The single power system is widely applied to the field of household range hoods, but because of the special working environment of the range hood, the outlet of the range hood is externally connected with a public flue, and especially in the peak cooking period, the outlet discharge faces large resistance, so that in order to further improve the wind pressure of the range hood and improve the oil fume suction effect, designers can often realize the oil fume suction effect through very large power or rotating speed, and the range hood has large noise and high energy consumption.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a range hood aiming at the problems in the prior art, which can increase the acting capacity on airflow, improve the flowing condition of a smoke exhaust path and improve the smoke exhaust effect.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a range hood, includes collection petticoat pipe and sets up the fan frame in collection petticoat pipe top, the inboard of fan frame is provided with fan system, its characterized in that: on the path of the air flow, an auxiliary exhaust device for assisting the oil smoke to be exhausted is further arranged at the downstream of the fan system, and the auxiliary exhaust device comprises a shell and an auxiliary exhaust movable vane arranged in the shell and capable of doing work on the air flow.

In order to increase the working capacity on the airflow, improve the flow condition of the smoke exhaust path and improve the smoke exhaust effect, the discharge assisting device comprises a shell and a discharge assisting blade capable of doing work on the airflow, wherein the discharge assisting blade comprises at least two first blades and a first mounting frame, the first blades are arranged on the peripheral wall of the first mounting frame at intervals along the circumferential direction of the first mounting frame; the discharge-assisting blade further comprises a driving mechanism for driving the first blade to rotate.

Preferably, the discharge-assisting blades are oblique flow impellers.

In order to facilitate recovery of static pressure, the discharge assisting apparatus further includes discharge assisting vanes capable of converting dynamic pressure of an outlet airflow of the discharge assisting vanes into static pressure, the discharge assisting vanes being fixed in the casing and being located upstream of the discharge assisting vanes on a path of airflow flow.

Preferably, the discharge-assisting vane includes a second blade and a second mounting frame, the second blade has at least two blades and is provided on a peripheral wall of the second mounting frame, and the second blade is arranged at intervals along a circumferential direction of the second mounting frame.

Preferably, to reduce the airflow resistance, the second mounting frame is cylindrical, and the axial direction of the second mounting frame is consistent with the displacement-assisting blades.

In order to facilitate the optimization of the flow field and guide the air flow to be discharged, the discharge-assisting device further comprises an outlet guide cover for guiding the air flow to be discharged out of the discharge-assisting device, the outlet guide cover is arranged in the shell, and the discharge-assisting movable blades are located on the upstream of the air outlet guide cover on the air flow flowing path.

In order to reduce the noise of the emission-aiding device, the range hood further comprises a noise reduction device sleeved on the periphery of the emission-aiding device.

Preferably, the noise reduction device includes a hollow casing, and the inside of the casing is filled with a sound absorbing member made of a sound absorbing material.

In order to connect the fan system and the auxiliary exhaust device and exhaust the oil smoke to the public flue, the range hood further comprises a smoke exhaust pipeline, the smoke exhaust pipeline comprises a first pipeline and a second pipeline, the first pipeline is connected between the fan system and the auxiliary exhaust device, the input end of the first pipeline is connected with the output end of the fan system, the output end of the first pipeline is connected with the input end of the auxiliary exhaust device, the input end of the second pipeline is connected with the output end of the auxiliary exhaust device, the output end of the second pipeline is used for being connected with the public flue, and the first pipeline, the shell and the second pipeline are arranged in a split mode or are integrally formed.

Compared with the prior art, the utility model has the advantages that: by arranging the exhaust assisting device and utilizing the exhaust assisting movable blades, the acting capacity on airflow can be increased, the flowing condition of a smoke exhaust path is improved, and the smoke exhaust effect is improved; by arranging the discharge-assisting stationary blades, airflow static pressure can be recovered, and resistance is reduced; by arranging the air outlet diversion cover, the flow field can be optimized, and air flow is guided to be discharged; the noise reduction device is arranged on the outer side of the discharge-assisting device, so that the noise of the discharge-assisting blade can be reduced, and the noise in the second pipeline can be reduced.

Drawings

FIG. 1 is a schematic view of a range hood according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a range hood in accordance with an embodiment of the present invention;

FIG. 3 is a sectional view of a discharge aiding device and a noise reducing device of a range hood according to an embodiment of the present invention;

fig. 4 is a schematic view of a part of components of a discharge assisting device of a range hood according to an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 2, a range hood includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, and a fan system 3 is disposed inside the fan frame 2.

The fan system 3 includes a volute 31, and an impeller 32 disposed within the volute 31. The impeller 32 may be of a double suction structure, and the impeller 32 discharges from an outlet through a flow-guiding design of the integrally formed volute 31.

Referring to fig. 2 to 4, on the path of the air flow, a discharge-assisting device 4 capable of increasing the working capacity of the air flow and improving the flow condition of the smoke exhaust path is further disposed downstream of the fan system 3. The discharge assisting apparatus 4 includes a casing 44 having a circular tube shape, discharge assisting blades 41 capable of applying work to the airflow, discharge assisting vanes 42 capable of converting the dynamic pressure of the airflow at the outlet of the discharge assisting blades 41 into the static pressure, and an outlet guide cover 43 capable of optimizing the airflow field. The discharge-assisting blades 41, the discharge-assisting stationary blades 42, and the outlet guide cover 43 are all provided in the casing 44, and in the path of the airflow, the discharge-assisting blades 41 are located upstream of the discharge-assisting stationary blades 42, and the discharge-assisting stationary blades 42 are located upstream of the outlet guide cover 43.

Referring to fig. 1-2, the range hood further includes a smoke exhaust duct, which includes a first duct 6 and a second duct 7. The first pipeline 6 is connected between the fan system 3 and the auxiliary exhaust device 4, the input end of the first pipeline 6 is connected with the output end of the fan system 3, the output end of the first pipeline 6 is connected with the input end of the auxiliary exhaust device 4, the input end of the second pipeline 7 is connected with the output end of the auxiliary exhaust device 4, and the output end of the second pipeline 7 is connected with the common flue.

The discharge-assisting blade 41 includes a first blade 411, a first mounting frame 412, and a driving mechanism 413 for driving the first blade 411 to rotate, and preferably, the driving mechanism 413 is a motor. The first blades 411 have at least two and are provided on the peripheral wall of the first mount 412 and are arranged at intervals along the circumferential direction, and the first mount 412 is fixed inside the housing 44. The airflow enters and exits along the axial direction of the discharge-assisting blades 41 (the rotational axis of the first blades 411). The discharge-assisting movable vane 41 adopts an oblique flow impeller structure, the designed air volume is consistent with that of the fan system 3, and the impeller diameter of the discharge-assisting movable vane 41 is consistent with the inner diameter of the first pipeline 6.

The discharge-assisting vane 42 is fixed in the casing 44, and includes a second blade 421 and a second mounting frame 422, the second mounting frame 422 has a cylindrical shape, an axial direction thereof is coincident with the discharge-assisting blade 41, an axial end portion thereof may be opened or not, and preferably, an end facing the discharge-assisting blade 41 is closed without being opened. The second blades 421 have at least two and are provided on the peripheral wall of the second mounting frame 422 and are arranged at intervals in the circumferential direction. The airflow enters and exits along the axial direction of the discharge-assist vanes 42. Preferably, the second vane 421 is integrally designed with the casing 44, and converts the dynamic pressure of the outlet airflow of the discharge-assisting blade 41 into the static pressure while fixing the casing 44, thereby improving the flow efficiency.

The air outlet guide sleeve 43 may be fixedly connected to or integrally formed with the second mounting frame 422, so as to optimize a flow field and guide the air flow to be discharged from the discharge assisting device 4, and the shape of the air outlet guide sleeve is preferably such that the area of the cross section of the air outlet guide sleeve is gradually reduced along the air flow direction, so as to further convert the dynamic pressure of the air flow. Preferably, the outlet dome 43 has a spherical crown shape.

The airflow is discharged from the outlet of the fan system 3, passes through the first pipeline 6, enters the discharge-assisting movable blades 41 of the discharge-assisting device 4, the discharge-assisting movable blades 41 apply work to the airflow, passes through the discharge-assisting stationary blades 42, further recovers static pressure, and optimizes an outlet airflow flow field through the outlet guide cover 43.

In this embodiment, the housing 44 is a separate component from the smoke exhaust duct, and alternatively, the housing 44 may be a part of the smoke exhaust duct, that is, the housing 44, the first duct 6 and the second duct 7 are integrally formed as a single duct.

The operating speed and working condition adjusting logic of the emission-assisting device 4 is as follows: a pressure sensor can be arranged at the outlet of the smoke exhaust pipeline (the output end of the second pipeline 7), the resistance of the smoke exhaust pipeline is detected to be P1, the resistance of the smoke exhaust pipeline is P2 when the fan system 3 is at the highest efficiency, the difference value between P1 and P2 is calculated, when P0< P1< ═ P2, in the formula, P0 is the lowest pipeline resistance, and the auxiliary exhaust movable blade 41 does not run; when the P2 is less than P1, the rotation speed of the discharge-assisting blades 41 is adjusted until P2 is equal to P1, which has the advantage of ensuring that the fan system 3 is always near the highest efficiency, so as to achieve the optimal noise level; when the P1< ═ P0, the fan system 3 can be shut down, and the auxiliary displacement blades 41 act as exhaust, so that the noise at the moment of use is reduced to the maximum extent.

Referring to fig. 1 to 3, the range hood further includes a noise reduction device 5 sleeved on the periphery of the auxiliary exhaust device 4. The noise reducer 5 includes a hollow casing 52, and a sound absorbing material 51 made of a sound absorbing material is filled inside the casing 52. The noise reducer 5 can reduce noise of the turbine bucket 41 and noise in the second duct 7.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1) and sets up fan frame (2) in collection petticoat pipe (1) top, the inboard of fan frame (2) is provided with fan system (3), its characterized in that: on the path of the air flow, an auxiliary exhaust device (4) for assisting the oil smoke exhaust is further arranged at the downstream of the fan system (3), and the auxiliary exhaust device (4) comprises a shell (44) and an auxiliary exhaust movable vane (41) which is arranged in the shell (44) and can do work on the air flow.

2. The range hood of claim 1, wherein: the discharge-assisting blade (41) comprises a first blade (411) and a first mounting rack (412), wherein the first blade (411) is provided with at least two blades and is arranged on the peripheral wall of the first mounting rack (412), and the first blades (411) are arranged at intervals along the circumferential direction of the first mounting rack (412); the discharge-assisting blade (41) further comprises a driving mechanism (413) for driving the first blade (411) to rotate.

3. The range hood of claim 2, wherein: the discharge-assisting movable blades (41) are oblique-flow impellers.

4. The range hood of claim 1, wherein: the discharge assisting device (4) further comprises a discharge assisting vane (42) capable of converting a dynamic pressure of an outlet airflow of the discharge assisting vane (41) into a static pressure, wherein the discharge assisting vane (42) is fixed in the casing (44), and the discharge assisting vane (41) is positioned upstream of the discharge assisting vane (42) on a flow path of the airflow.

5. The range hood of claim 4, wherein: the auxiliary-row stationary blade (42) comprises a second blade (421) and a second mounting frame (422), the second blade (421) is provided with at least two blades and is arranged on the peripheral wall of the second mounting frame (422), and the second blades (421) are arranged at intervals along the circumferential direction of the second mounting frame (422).

6. The range hood of claim 5, wherein: the second mounting frame (422) is cylindrical, and the axial direction of the second mounting frame (422) is consistent with that of the discharge-assisting blades (41).

7. The range hood of claim 1, wherein: the discharge-assisting device (4) further comprises an outlet guide sleeve (43) guiding the airflow to be discharged out of the discharge-assisting device (4), the outlet guide sleeve (43) is arranged in the shell (44), and the discharge-assisting blades (41) are located on the upstream of the outlet guide sleeve (43) on the airflow flowing path.

8. The range hood of claim 1, wherein: the range hood also comprises a noise reduction device (5) sleeved on the periphery of the auxiliary exhaust device (4).

9. The range hood of claim 8, wherein: the noise reduction device (5) comprises a hollow shell (52), and a sound absorption piece (51) made of sound absorption materials is filled in the inner side of the shell (52).

10. The range hood according to any one of claims 1 to 9, wherein: the range hood still includes the exhaust pipe, the exhaust pipe includes first pipeline (6) and second pipeline (7), first pipeline (6) are connected between fan system (3) and help row device (4), the input of first pipeline (6) is connected with the output of fan system (3), and the output of first pipeline (6) is connected with the input of helping row device (4), the input of second pipeline (7) is connected with the output of helping row device (4), and the output of second pipeline (7) is used for being connected with public flue, first pipeline (6), casing (44) and second pipeline (7) components of a whole that can function independently set up or integrated into one piece.