CN111853893B

CN111853893B - Range hood and control method thereof

Info

Publication number: CN111853893B
Application number: CN202010669372.9A
Authority: CN
Inventors: 何勇; 何立博; 安凯
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2020-07-13
Filing date: 2020-07-13
Publication date: 2021-11-26
Anticipated expiration: 2040-07-13
Also published as: CN111853893A

Abstract

The invention discloses a range hood, which comprises a shell, a panel arranged on the front side of the shell and a smoke baffle assembly, wherein the panel is provided with an air inlet, the smoke baffle assembly comprises a smoke baffle capable of opening or closing the air inlet in a turnover manner, and a gap is formed between the upper end of the smoke baffle and the panel when the smoke baffle is in a state of opening the air inlet, and the range hood is characterized in that: keep off the cigarette board subassembly still including preventing running the cigarette device, thereby prevent running the cigarette device including setting up on keeping off the cigarette board and can keep off the partition panel that the cigarette board removed and shelter from the gap relatively. Also discloses a control method of the range hood. Compared with the prior art, the invention has the advantages that: through setting up the partition panel that can keep off the cigarette board relatively and remove, can effectively cut off the passageway that the oil smoke escaped from the gap between cigarette board and the panel, reduce and run the cigarette.

Description

Range hood and control method thereof

Technical Field

The invention relates to an oil fume purification device, in particular to a range hood and a control method of the range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The side-draft range hood absorbs most of oil smoke close to a cooking bench in an arc form by using a vortex air pressure principle, so that adverse effects on human health can be reduced, and the suction effect of a power source is basically not reduced because the power source is close to the cooking bench.

In order to prevent the oil smoke from escaping and further improve the effect of absorbing the oil smoke, the current range hood is generally provided with a smoke baffle plate for guiding the oil smoke to flow at an air inlet. The invention discloses an air return prevention mechanism of a range hood, which comprises an oil receiving bottom groove, a range hood body, a baffle, an opening and closing panel, a flue shell and a smoke baffle, wherein the baffle is arranged on the range hood body, the opening and closing panel is connected and arranged on the range hood body through a rotating shaft, the flue shell is arranged above the range hood body, a cavity is arranged inside the range hood body, and the smoke baffle is arranged on the range hood body.

As the smoke baffle of the existing range hood is exposed above oil smoke for a long time and is directly contacted with the oil smoke, in the process that the smoke baffle is opened and closed around a shaft, a gap exists at the joint of the smoke baffle and the shell of the range hood, and the area can reach 0.45m²Left and right, thereby can lead to the escape of oil smoke, and when the oil smoke volume that cooks the production is big, the oil smoke escapes especially obviously.

At present, the traditional side-draft range hood directly neglects the problem that oil smoke escapes from a gap at the joint of a smoke baffle and a range hood shell. Most side-draught range hoods are not provided with decorative strips, even if the decorative strips are arranged, the connecting part of the smoke baffle and the shell of the range hood can have large gaps, so that the phenomenon of serious oil smoke escape can occur, the cooking experience of a user is influenced, and the health of the user can be threatened.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a range hood to reduce the escape of oil smoke and improve the effect of oil smoke absorption, aiming at the defects in the prior art.

The second technical problem to be solved by the present invention is to provide a control method for the above range hood.

The technical scheme adopted by the invention for solving the first technical problem is as follows: the utility model provides a range hood, includes the casing, sets up panel and the fender cigarette board subassembly in the casing front side, the air intake has been seted up on the panel, keep off the cigarette board subassembly including opening or closing the fender cigarette board of air intake with can overturning, keep off the cigarette board when the state of opening the air intake, keep off and form gap, its characterized in that between the upper end of cigarette board and the panel: keep off the cigarette board subassembly still including preventing running the cigarette device, thereby prevent running the cigarette device including setting up on keeping off the cigarette board and can keep off the partition panel that the cigarette board removed and shelter from the gap relatively.

Preferably, in order to keep the appearance of the complete machine, avoid extension board and panel to interfere simultaneously, the partition panel sets up in one side in keeping off the cigarette board towards the casing to can be along the extending direction rectilinear movement who keeps off the cigarette board, when keeping off the state that the cigarette board is in the closed air intake, the upper end of partition panel does not surpass the upper end that keeps off the cigarette board.

Preferably, in order to shorten the stroke of the extension plate, when the smoke barrier is in a state of closing the air inlet, the upper end of the partition plate is flush with the upper end of the smoke barrier.

In order to facilitate the automatic driving of the smoke baffle plate and the partition plate, the smoke baffle plate assembly further comprises a first driving mechanism for driving the smoke baffle plate to overturn and a second driving mechanism for driving the partition plate to move linearly.

The range finding sensor is used for detecting the distance between the upper end of the partition board and the panel, the smoke sensor is used for detecting the concentration of oil smoke, and the controller is used for controlling the first driving mechanism and the second driving mechanism according to data detected by the range finding sensor and the smoke sensor, and the first driving mechanism and the second driving mechanism are electrically connected to the controller.

Preferably, in order to facilitate monitoring, the distance measuring sensor comprises a receiving end and a transmitting end, one of the receiving end and the transmitting end is arranged at the upper end of the partition plate, the other one of the receiving end and the transmitting end is arranged on the panel, and when the smoke baffle is in a state of completely opening the air inlet, the receiving end and the transmitting end are opposite in position.

Preferably, for ease of monitoring, the smoke sensor is provided on the surface of the panel facing the front and above the smoke barrier.

The technical scheme adopted by the invention for solving the second technical problem is as follows: a control method for a range hood as described above, characterized in that: the method comprises the following steps:

1) starting, starting the controller;

2) judging whether the receiving end of the distance measuring sensor receives the signal of the transmitting end, if so, judging that the smoke baffle is opened in place, and continuing the next step; if not, judging that the smoke baffle is not opened in place, and sending a signal that the smoke baffle is not opened in place to a user or corresponding maintenance personnel;

3) judging whether the distance value detected by the distance measuring sensor is larger than a first set value or not, if so, continuing the next step; if not, the anti-smoke-leakage device is not started, and then the step is repeated;

4) judging whether the numerical value of the smoke sensor is larger than a second set value or not, if so, opening the smoke leakage prevention device, starting to cut off a channel of a gap between the smoke baffle plate and the panel, and continuing the next step; if not, judging that the smoke leakage prevention device does not need to be opened, and then repeating the step;

5) judging whether the numerical value detected by the distance measuring sensor is smaller than a third set value or not, and if so, judging that the anti-smoke-leakage device is started in place; if not, the anti-smoke-leakage device is judged not to be opened in place.

Preferably, in step 5), if the number of times that the value detected by the distance measuring sensor is smaller than the third set value reaches n times, it is determined that the smoke leakage prevention device is started to have a problem, and a corresponding signal is sent to a user or a maintenance person.

Compared with the prior art, the invention has the advantages that: the partition plate capable of moving relative to the smoke baffle plate is arranged, so that a channel for oil smoke to escape from a gap between the smoke baffle plate and the panel can be effectively partitioned, and the oil smoke leakage is reduced; the partition panel is installed and is kept off the one side in the cigarette board orientation casing, does not expose in user's the field of vision, does not influence complete machine wholeness.

Drawings

FIG. 1 is a schematic view of a kitchen ventilator with a smoke leakage prevention device according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the kitchen ventilator of the present invention showing the non-operation state of the smoke leakage prevention device;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

fig. 4 is a schematic view of a smoke baffle assembly of the range hood according to the embodiment of the invention;

fig. 5 is an exploded schematic view of a smoke barrier assembly of the range hood according to the embodiment of the invention;

FIG. 6 is a partial schematic view of a range hood according to an embodiment of the present invention;

FIG. 7 is a schematic view of the working state of the smoke leakage prevention device of the range hood according to the embodiment of the present invention;

FIG. 8 is a sectional view of the operating state of the smoke leakage prevention device of the range hood according to the embodiment of the present invention;

FIG. 9 is an enlarged view of portion II of FIG. 8;

fig. 10 is a control flow chart of the range hood according to the embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

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 and 2, a range hood, which is a side-draft range hood, includes a housing 1, a panel 2 disposed on the front side of the housing 1, and a fan system 3 disposed in the housing 1.

An air inlet 21 is formed in the panel 2, a smoke barrier component 4 is arranged at the air inlet 21, and the smoke barrier component 4 can turn over to open or close the air inlet 21.

Referring to fig. 3 to 5, the smoke baffle assembly 4 includes a smoke baffle 41 and a smoke leakage prevention device 42, the smoke leakage prevention device 42 includes a partition 421, the partition 421 is disposed on one side of the smoke baffle 41 facing the inside of the housing 1, and the smoke baffle 41 and the partition 421 are closely attached to each other. The smoke barrier assembly 4 can be turned in any conventional manner, for example, in this embodiment, referring to fig. 6, the smoke barrier 41 is driven by a first driving mechanism 43, the first driving mechanism 43 is a combination of an electric push rod and a hinge, and of course, a combination of an electric motor and a hinge can also be used. The first driving mechanism 43 may include a driving end and a driven end, which are respectively provided on the left and right sides, or may be provided only one, which is provided in the middle.

When the smoke barrier assembly 4 closes the air inlet 21, the upper end of the partition plate 421 does not exceed the upper end of the smoke barrier 41, and the smoke barrier 41 is flush with the panel 2. Preferably, the upper end of the partition plate 421 is flush with the upper end of the smoke barrier 41, so that the stroke of the partition plate 421 can be shortened and the adjustment can be accelerated. When the air inlet 21 needs to be opened, the smoke barrier 41 starts to turn over outwards under the driving of the first driving mechanism 43 by the smoke barrier assembly 4, the lower end of the smoke barrier 41 gradually leaves the panel 2, and after the smoke barrier 41 is completely opened or opened to a desired position, a gap Q1 is formed between the upper end of the smoke barrier 41 and the panel 2, at this time, the partition 421 can move towards the direction close to the panel 2 along the extending direction of the smoke barrier 41 according to needs, and partially or completely move out of the upper end of the smoke barrier 41 (at this time, the lower end of the smoke barrier 41 is located before the upper end, and the upper end of the partition 421 is located after the upper end of the smoke barrier 41), and is shielded below the gap Q1. Since the gap Q1 between the smoke barrier 41 and the panel 2 in the open state is not too large, the width of the partition plate 421 is smaller than the width of the smoke barrier 41, such as about 1/5 of the width of the smoke barrier 41, as long as the gap Q1 between the smoke barrier 41 and the panel 2 is shielded (the partition plate 421 is shielded below the gap Q1). Thus, the blocking plate 421 may be disposed at an upper portion of the smoke barrier 41. The stroke of the partition plate 421 is not greater than the width of the gap Q1 between the smoke barrier 41 and the panel 2 to avoid interference of the upper end panel 2 of the partition plate 421. The width in the present application refers to a dimension in a moving direction of the partition 421, that is, a dimension in a vertical direction in a closed state of the smoke barrier assembly 4, and a dimension in a front-rear direction in an open state of the smoke barrier assembly 4.

The smoke leakage prevention device 42 further comprises a second driving mechanism 422 for driving the partition board 421 to move, wherein the second driving mechanism 422 is a linear driving module, and can adopt a common motor, a combination of a gear and a rack, a combination of a motor and a screw rod, a combination of a motor and a worm gear, an electric push rod and the like.

When starting the range hood, the smoke barrier 41 is driven by the first driving mechanism 43 to open slowly, when judging that the starting condition of the smoke leakage prevention device 42 is reached, the smoke leakage prevention device 42 is started, and the partition 421 moves upwards under the drive of the second driving mechanism 422. When the smoke leakage prevention device 42 is opened in place, the channel through which smoke escapes from the gap Q1 between the smoke baffle plate 41 and the panel 2 can be effectively blocked, and the occurrence of the phenomenon of smoke leakage is reduced, as shown in fig. 7 to 9.

Alternatively, the partition 421 may be not in the form of a straight line movement, but may be in the form of a reversed position to block or separate the gap Q1 between the smoke barrier 41 and the panel 2.

In order to automatically control the second driving mechanism 422 of the partition board 421, the extractor hood of the present invention further includes a distance measuring sensor 51 and a smoke sensor 52, wherein the distance measuring sensor 51 is used for measuring the distance between the upper end of the smoke barrier assembly 4 and the panel 2, and the distance measuring sensor 51 may be a laser distance measuring sensor, an infrared distance measuring sensor, or the like. The distance measuring sensor 51 includes a receiving end 511 and an emitting end 512, and one of the receiving end 511 and the emitting end 512 is disposed at an upper end of the partition board 421 and the other is disposed on the panel 2. When the smoke barrier 41 is fully opened, the receiving end 511 and the transmitting end 512 are positioned opposite to each other, thereby completing transmission and reception of signals. The smoke sensor 52 is provided on the surface of the panel 2 facing the front side and above the smoke barrier 41, for measuring the amount of smoke concentration.

The first driving mechanism 43, the second driving mechanism 422, the distance measuring sensor 51 and the smoke sensor 52 can be electrically connected to a controller of the range hood, and the controller controls the first driving mechanism 43 and the second driving mechanism 422 according to data detected by the distance measuring sensor 51 and the smoke sensor 52.

Specifically, referring to fig. 10, when the range hood is in the working state and the smoke barrier assembly 4 opens the air inlet 21, the control method includes the following steps:

1) starting, starting the controller;

2) judging whether the receiving end 511 of the distance measuring sensor 51 receives the signal of the transmitting end 512, if so, judging that the smoke baffle 41 is opened in place, and continuing the next step; if not, judging that the smoke baffle plate 41 is not opened in place, and sending a signal that the smoke baffle plate 41 is not opened in place to a user or corresponding maintenance personnel;

3) judging whether the distance value detected by the distance measuring sensor 51 is larger than a first set value or not, if so, continuing the next step; if not, the smoke-leakage-preventing device 42 is not started, the gap Q1 between the default smoke baffle plate 41 and the panel 2 is within the tolerance range of the user, the influence on the health of the user is ignored, and then the step is repeated;

4) judging whether the value of the smoke sensor 52 is larger than a second set value, if so, opening the smoke leakage prevention device 42 to cut off the passage of a gap Q1 between the smoke baffle plate 41 and the panel 2, and continuing the next step; if not, it is determined that the smoke leakage prevention device 42 does not need to be turned on, and then the present step is repeated;

5) judging whether the value detected by the distance measuring sensor 51 is smaller than a third set value, if so, judging that the smoke leakage prevention device 42 is opened in place, and blocking a channel of a gap Q1 between the smoke baffle plate 41 and the panel 2; if not, the anti-smoke-leakage device 42 is judged not to be opened in place, if the judged times reach n times, the anti-smoke-leakage device 42 is judged to be opened to cause a problem, and a corresponding signal is sent to a user or a maintenance worker.

Optionally, the first, second, and third setting values may be specific values set for the user himself. Similarly, the fault tolerance number n may be set to 3, and the user may set the fault tolerance number by himself or herself.

Claims

1. The utility model provides a range hood, includes casing (1), sets up panel (2) and the cigarette board subassembly (4) of keeping off in casing (1) front side, air intake (21) have been seted up on panel (2), keep off cigarette board subassembly (4) including keeping off cigarette board (41) that can open or close air intake (21) with overturning, keep off cigarette board (41) and form gap (Q1), its characterized in that between upper end and panel (2) of cigarette board (41) when being in the state of opening air intake (21): the smoke baffle assembly (4) further comprises a smoke leakage prevention device (42), wherein the smoke leakage prevention device (42) comprises a partition plate (421) which is arranged on the smoke baffle plate (41) and can move relative to the smoke baffle plate (41) so as to shield the gap (Q1); partition panel (421) set up in keeping off one side in cigarette board (41) towards casing (1) and can be along the extending direction rectilinear movement who keeps off cigarette board (41), when keeping off cigarette board (41) and being in the state of closing air intake (21), the upper end of partition panel (421) does not surpass the upper end that keeps off cigarette board (41).

2. The range hood of claim 1, wherein: when the smoke baffle plate (41) is in a state of closing the air inlet (21), the upper end of the partition plate (421) is flush with the upper end of the smoke baffle plate (41).

3. The range hood of claim 1 or 2, wherein: the smoke baffle assembly (4) further comprises a first driving mechanism (43) used for driving the smoke baffle plate (41) to overturn and a second driving mechanism (422) used for driving the partition plate (421) to move linearly.

4. The range hood of claim 3, wherein: the range hood further comprises a distance measuring sensor (51) used for detecting the distance between the upper end of the partition board (421) and the panel (2), a smoke sensor (52) used for detecting the concentration of oil smoke, and a controller used for controlling the first driving mechanism (43) and the second driving mechanism (422) according to data detected by the distance measuring sensor (51) and the smoke sensor (52), wherein the first driving mechanism (43) and the second driving mechanism (422) are electrically connected to the controller.

5. The range hood of claim 4, wherein: the distance measuring sensor (51) comprises a receiving end (511) and an emitting end (512), one of the receiving end (511) and the emitting end (512) is arranged at the upper end of the partition board (421), the other one of the receiving end (511) and the emitting end (512) is arranged on the panel (2), and when the smoke baffle (41) is in a state of completely opening the air inlet (21), the receiving end (511) and the emitting end (512) are opposite in position.

6. The range hood of claim 4, wherein: the smoke sensor (52) is arranged on the surface of the panel (2) facing the front side and is positioned above the smoke baffle plate (41).

7. A control method of a range hood according to any one of claims 4 to 6, characterized in that: the method comprises the following steps:

1) starting, starting the controller;

2) judging whether a receiving end (511) of the ranging sensor (51) receives a signal of a transmitting end (512), if so, judging that the smoke baffle plate (41) is opened in place, and continuing the next step; if not, judging that the smoke baffle plate (41) is not opened in place, and sending a signal that the smoke baffle plate (41) is not opened in place to a user or corresponding maintenance personnel;

3) judging whether the distance value detected by the distance measuring sensor (51) is larger than a first set value or not, if so, continuing the next step; if not, the anti-smoke-leakage device (42) is not started, and then the step is repeated;

4) judging whether the value of the smoke sensor (52) is larger than a second set value or not, if so, opening the smoke leakage prevention device (42) to cut off a channel of a gap (Q1) between the smoke baffle plate (41) and the panel (2), and continuing the next step; if not, determining that the anti-smoke-leakage device (42) does not need to be opened, and then repeating the step;

5) judging whether the numerical value detected by the distance measuring sensor (51) is smaller than a third set value, if so, judging that the anti-smoke-leakage device (42) is started in place; if not, the anti-smoke-leakage device (42) is judged not to be opened in place.

8. The control method of the range hood according to claim 7, characterized in that: in the step 5), if the number of times that the value detected by the distance measuring sensor (51) is smaller than the third set value reaches n times, the fact that the smoke leakage prevention device (42) is started to have a problem is judged, and a corresponding signal is sent to a user or a maintenance person.