CN111288527B

CN111288527B - Fume exhaust fan

Info

Publication number: CN111288527B
Application number: CN202010244448.3A
Authority: CN
Inventors: 邹志锋
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2022-04-19
Anticipated expiration: 2040-03-31
Also published as: CN111288527A

Abstract

The invention relates to a range hood, which comprises a shell, a filter screen and a driving piece, wherein the filter screen is made of flexible flame-retardant paper, a plurality of filter holes with different sizes are formed in the flexible flame-retardant paper, the flexible flame-retardant paper is rolled around one edge to form a roll paper structure which is gradually stacked from inside to outside, the axial length of the roll paper structure is matched with the width of an air inlet, the axial direction of the roll paper structure extends along the first width edge of the air inlet, the free end of the roll paper cylinder structure extends to the second width edge of the air inlet to form the filter screen covered on the air inlet, and the driving piece is arranged at the second width edge of the air inlet of the shell and used for winding and recovering the flexible flame-retardant paper. The total area of the filtering holes can be adjusted by pulling the flexible flame-retardant paper, so that the air inlet area of the air inlet can be adjusted according to the concentration of the oil smoke; meanwhile, the flexible flame-retardant paper used for a period of time is recovered by rolling and can be replaced by a new filter screen, so that the filter screen is kept clean, and the filtering effect is improved.

Description

Fume exhaust fan

Technical Field

The invention relates to a range hood.

Background

During cooking, to cooking different dishes, often can have sometimes that the oil smoke volume is great, sometimes the less condition of oil smoke volume, and the filter screen of the air intake department installation of most range hoods at present can't adjust the air inlet area according to the oil smoke size.

Chinese patent application publication No. CN110207202A, "range hood with adjustable air intake area and control method thereof," discloses a structure, which includes a box, a smoke collecting hood, an oil screen structure, a fan, a sensor and a controller, wherein the smoke collecting hood is disposed below the box, the smoke collecting hood is provided with a left air inlet and a right air inlet, the left air inlet and the right air inlet are both provided with the oil screen structure, the fan and the controller are both disposed in the box, the sensor is disposed on the oil screen structure, and the controller is respectively connected with the oil screen structure and the sensor and is used for adjusting the air intake area of the oil screen structure according to the concentration of the oil smoke collected by the sensor.

Although the range hood can realize the adjustment of the air quantity of the air inlet, oil dirt is easy to accumulate on the laminated adjusting structure and the filter screen, and the whole structure of the range hood is inconvenient to disassemble and clean.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides a range hood which can adjust the air inlet area according to the concentration of oil smoke and keep a filtering structure clean.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a range hood, includes the casing, and this casing bottom has the air intake, its characterized in that: still include filter screen and driving piece, the filter screen is made by flexible fire-retardant paper, it has the filter pores of a plurality of variation in size to open on the flexible fire-retardant paper, flexible fire-retardant paper is rolled up by an edge and is made by interior and outer roll web structure range upon range of gradually, the axial length of this roll web structure with the width phase-match of air intake, roll up the paper tube structure and can locate on the casing with rotating and the axial of roll web structure extends along the first width edge of air intake, thereby the free end of roll paper tube structure extends to the second width edge relative with first width edge of air intake and forms and covers on the air intake the filter screen, the second width edge of casing air intake is located to the driving piece and is used for convoluteing the recovery with flexible fire-retardant paper.

In the above scheme, range hood is still including the first reel that is used for depositing the paper roll structure, the second reel that is used for retrieving flexible fire-retardant paper, open on the first width edge that casing air intake was located to first reel and the roof and have the exit slot that supplies flexible fire-retardant paper to stretch out, open on the second width edge that casing air intake was located to the second reel and the roof and have the paper feed mouth that supplies flexible fire-retardant paper to get into. The structure is favorable for protecting the paper feeding and discharging, and meanwhile, the assembly is convenient.

In order to facilitate the recovery of the waste paper, a reel extending along the axial direction and used for rolling the recovered flexible flame-retardant paper is arranged in the second winding drum, the driving piece is a motor arranged at the end part of the second winding drum, and an output shaft of the motor is connected with the reel.

Preferably, a gravity sensor capable of detecting the weight of the filter screen is arranged at the edge close to the corresponding paper outlet/paper inlet on the first winding drum and/or the second winding drum, and the gravity sensor is located below the filter screen and is abutted against the lower wall surface of the filter screen. The gravity sensors are four and symmetrically arranged on the first winding drum and the second winding drum in pairs, after the gravity sensors are used for a period of time, the oil smoke amount adhered to the filter screen can be judged by using the gravity sensors, so that the dirt degree of the filter screen is measured, and if the filter screen is dirty, the flexible flame-retardant paper can be pulled by the driving piece to replace the filter screen.

Preferably, the upper end of the gravity sensor is provided with a ball, and correspondingly, the upper wall surface of the flexible flame-retardant paper is provided with a rolling groove in rolling fit with the ball. The structure is beneficial to reducing the transmission resistance of the flexible flame-retardant paper.

In each scheme, a plurality of filtering hole units are arranged on the flexible flame-retardant paper along the length direction, each filtering hole unit is respectively provided with a small hole part and a large hole part which are separated along the length direction, and the length of each small hole part and the length of each large hole part are both greater than 1/2 times of the length of the filter screen (air inlet). The position of the flexible flame-retardant paper is adjusted along the length direction, so that the area of the small hole part and the area of the large hole part in the filter screen can be adjusted, and the air inlet amount is adjusted.

In order to facilitate accurate detection of the area of the air inlet, the range hood further comprises a detection structure capable of detecting the flow area of the filter screen, and the detection structure is an infrared sensor arranged at the filter screen. The edge of filter screen is provided with the light trap of seting up along its moving direction interval, and the internal diameter of this light trap increases gradually from aperture part to macropore part, infrared sensor arranges and can mutually support transmitter and the receiver that detects the printing opacity area including corresponding the light trap.

Preferably, the housing is provided with a smoke sensor which is arranged close to the edge of the air inlet and used for detecting the concentration of the oil smoke. So as to adjust the area of the air inlet according to the concentration of the oil smoke.

Compared with the prior art, the invention has the advantages that: the invention can adjust the total area of the filtering holes on the flexible flame-retardant paper by pulling the flexible flame-retardant paper, thereby adjusting the air inlet area of the filter screen and realizing the adjustment of the air inlet area of the air inlet according to the concentration of the oil smoke; meanwhile, the flexible flame-retardant paper used for a period of time is recovered by rolling and can be replaced by a new filter screen, so that the filter screen is kept clean, and the filtering effect is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an embodiment of the present invention;

FIG. 3 is a schematic view of a filter net and its assembly structure according to an embodiment of the present invention;

FIG. 4 is a schematic view of the structure of FIG. 3 from another angle;

FIG. 5 is an enlarged view of portion A of FIG. 4;

fig. 6 is a cross-sectional view of fig. 3.

Detailed Description

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

As shown in fig. 1 to 6, the range hood of the embodiment includes a housing 1, a filter screen 20 and a driving member 3, the bottom of the housing 1 has an air inlet 11, the filter screen 20 is made of flexible flame-retardant paper, the flexible flame-retardant paper is provided with a plurality of filter holes 21 with different sizes, as shown in fig. 2, the flexible flame-retardant paper is rolled around an edge to form a roll paper structure 2 which is gradually stacked from inside to outside, and the axial length of the roll paper structure 2 is matched with the width of the air inlet 11. The roll paper tube structure 2 is rotatably disposed on the housing 1, an axial direction of the roll paper structure 2 extends along a first width edge of the air inlet 11, and a free end of the roll paper tube structure 2 extends towards a second width edge of the air inlet 11 opposite to the first width edge to form the filter screen 20 covering the air inlet 11. The driving piece 3 is arranged at the second width edge of the air inlet 11 of the shell 1 and is used for winding and recovering the flexible flame-retardant paper.

The range hood of this embodiment is still including the first reel 22 that is used for depositing paper winding structure 2, a second reel 23 for retrieving flexible fire-retardant paper, first reel 22 is located and is opened on the first width edge of casing 1 air intake 11 and the roof and supply the exit slot 221 that flexible fire-retardant paper stretches out, second reel 23 is located and is opened on the second width edge of casing 1 air intake 11 and the roof and supply the paper feed mouth 231 of flexible fire-retardant paper entering, this structure is favorable to protecting business turn over paper, and simultaneously, the assembly of also being convenient for.

In order to facilitate the recovery of the waste paper, a reel 232 extending along the axial direction and used for rolling the recovered flexible flame-retardant paper is arranged in the second winding drum 23, the driving member 3 is a motor arranged at the end of the second winding drum 23, and an output shaft of the motor is connected with the reel 232 to drive the reel 232 to rotate so as to realize the paper rolling action.

The first reel 22 and the second reel 23 are provided with a gravity sensor 4 capable of detecting the weight of the filter screen at the edge close to the corresponding paper outlet 221 and paper inlet 231, and the gravity sensor 4 is located below the filter screen 20 and abuts against the lower wall surface of the filter screen 20. The gravity sensor 4 in this embodiment is four and two liang a set of symmetry sets up on first reel 22, second reel 23, uses a period of back, and the oil smoke volume of adhesion on usable above-mentioned gravity sensor 4 is to filter screen 20 judges to measure the dirty degree of filter screen 20, if filter screen 20 is dirty, accessible driving piece 3 pulling flexible fire-retardant paper and change filter screen 20. The upper end of the gravity sensor 4 is provided with a ball 41, and correspondingly, the upper wall surface of the flexible flame-retardant paper is provided with a rolling groove 24 matched with the ball 41 in a rolling manner, so that the structure is favorable for reducing the transmission resistance of the flexible flame-retardant paper.

In this embodiment, a plurality of filter hole units are arranged on the flexible flame-retardant paper along the length direction, each filter hole unit is provided with a small hole part 251 and a large hole part 252 separated along the length direction, and the lengths of the small hole part 251 and the large hole part 252 are both greater than 1/2 times of the length of the filter screen 20 (the air inlet 11) and less than or equal to the length of the filter screen 20 (the air inlet 11). By adjusting the position of the flexible flame-retardant paper in the length direction, the area of the small hole portion 251 and the total area of the large hole portion 252 in the filter net 20 can be adjusted, thereby adjusting the intake air amount.

In order to facilitate accurate detection of the air inlet area of the air inlet 11, the range hood further comprises a detection structure 5 capable of detecting the flow area of the filter screen 20, and the detection structure 5 is an infrared sensor arranged at the filter screen. The edge of the filter screen 20 is provided with light holes 26 spaced along the moving direction thereof, and the inner diameter of the light holes 26 gradually increases from the small hole portion 251 to the large hole portion 252, i.e. the light transmission area of the light holes 26 corresponds to the air inlet area of the filter screen 20.

As shown in fig. 3 and 4, the infrared sensor includes a transmitter 51 and a receiver 52 which are disposed corresponding to the light-transmitting holes 26 and can cooperate with each other to detect the light-transmitting area, and the transmitter 51 and the receiver 52 in this embodiment are respectively disposed on two sides of the filter screen 20 and fixed on the first reel 22/the second reel 23.

The housing 1 of the present embodiment is provided with a smoke sensor 6 disposed near the edge of the air inlet 11 for detecting the concentration of the oil smoke, and the smoke sensor 6 may also be disposed on the first winding drum 22/the second winding drum 23. So as to adjust the area of the air inlet 11 according to the concentration of the oil smoke.

When the smoke sensor 6 detects that the concentration of the oil smoke is high, the smoke sensor can pull the flexible flame-retardant paper through the driving part 3, and the total area of the corresponding filtering holes 21 on the filter screen 20 is judged according to the light transmission area of the light transmission holes 26 detected by the detection structure 5, so that the total area corresponds to high air intake; when the smoke sensor 6 detects that the oil smoke concentration is small, the air inlet amount of the air inlet 11 is adjusted to be small by the same method. After range hood used a period, when weighing sensor 4 detected that filter screen 20 oiled dirty when reaching a definite value, through the flexible fire-retardant paper of driving piece 3 pulling, changed for new filter screen to keep the filter screen clean, improve the filter effect.

Claims

1. The utility model provides a range hood, includes casing (1), and this casing (1) bottom has air intake (11), its characterized in that: also comprises a filter screen (20) and a driving piece (3), wherein the filter screen (20) is made of flexible flame-retardant paper, the flexible flame-retardant paper is provided with a plurality of filtering holes (21) with different sizes, the flexible flame-retardant paper is rolled around one edge to form a roll paper structure (2) which is gradually stacked from inside to outside, the axial length of the roll paper structure (2) is matched with the width of the air inlet (11), the roll paper structure (2) can be rotatably arranged on the shell (1) and the axial direction of the roll paper structure (2) extends along the first width edge of the air inlet (11), the free end of the roll paper structure (2) extends towards a second width edge of the air inlet (11) opposite to the first width edge so as to form the filter screen (20) covered on the air inlet (11), the driving piece (3) is arranged at the edge of the second width of the air inlet (11) of the shell (1) and is used for winding and recovering the flexible flame-retardant paper;

the paper roll structure is characterized by further comprising a first winding drum (22) used for storing the roll paper structure (2) and a second winding drum (23) used for recycling flexible flame-retardant paper, wherein the first winding drum (22) is arranged at a first width edge of the air inlet (11) of the shell (1), a paper outlet (221) for the flexible flame-retardant paper to stretch out is formed in the top wall of the first winding drum, the second winding drum (23) is arranged at a second width edge of the air inlet (11) of the shell (1), and a paper inlet (231) for the flexible flame-retardant paper to enter is formed in the top wall of the second winding drum; a gravity sensor (4) capable of detecting the weight of the filter screen (20) is arranged on the edge of the first winding drum (22) and/or the second winding drum (23) close to the corresponding paper outlet (221)/paper inlet (231), and the gravity sensor (4) is positioned below the filter screen (20) and is abutted against the lower wall surface of the filter screen (20); the upper end of the gravity sensor (4) is provided with a ball (41), and correspondingly, the upper wall surface of the flexible flame-retardant paper is provided with a rolling groove (24) in rolling fit with the ball (41);

the flexible flame-retardant paper is provided with a plurality of filter hole units along the length direction, each filter hole unit is respectively provided with a small hole part (251) and a large hole part (252) which are separated along the length direction, and the lengths of the small hole part (251) and the large hole part (252) are both greater than 1/2 times of the length of the filter screen (20); the device also comprises a detection structure (5) capable of detecting the flow area of the filter screen (20), wherein the detection structure (5) is an infrared sensor arranged at the filter screen (20); the edge of the filter screen (20) is provided with light holes (26) which are arranged at intervals along the moving direction of the filter screen, the inner diameter of each light hole (26) is gradually increased from the small hole part (251) to the large hole part (252), and the infrared sensor comprises an emitter (51) and a receiver (52) which are arranged corresponding to the light holes (26) and can be matched with each other to detect the light transmission area;

a smoke sensor (6) which is arranged close to the edge of the air inlet (11) and is used for detecting the concentration of the oil smoke is arranged on the shell (1);

a reel (232) which extends along the axial direction and is used for reeling the recovered flexible flame-retardant paper is arranged in the second reel (23), the driving piece (3) is a motor arranged at the end part of the second reel (23), and an output shaft of the motor is connected with the reel (232);

when the smoke sensor detects that the oil smoke concentration is high, the flexible flame-retardant paper is pulled through the driving piece, and the total area of the corresponding filtering holes in the filter screen is judged according to the light transmission area of the light transmission holes detected by the detection structure, so that the total area corresponds to high air intake; when the smoke sensor detects that the oil smoke concentration is small, the air inlet amount of the air inlet is adjusted to be small by adopting the same method; after the range hood uses a period, when weighing sensor detects that the greasy dirt reaches a definite value on the filter screen, through the flexible fire-retardant paper of driving piece pulling, change for new filter screen to keep the filter screen clean, improve the filter effect.