CN112344404B - Range hood and control method thereof - Google Patents
Range hood and control method thereof Download PDFInfo
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- CN112344404B CN112344404B CN202011109855.XA CN202011109855A CN112344404B CN 112344404 B CN112344404 B CN 112344404B CN 202011109855 A CN202011109855 A CN 202011109855A CN 112344404 B CN112344404 B CN 112344404B
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- infrared receiver
- oil smoke
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- opened
- side baffle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2078—Removing cooking fumes movable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention discloses a range hood, which comprises a shell and a panel arranged on the front side of the shell, wherein a first air inlet is formed in the upper part of the panel, a smoke baffle plate is arranged at the first air inlet, and the smoke baffle plate can open or close the first air inlet, and is characterized in that: the range hood still includes and gathers together the cigarette module, it includes the side shield to gather together the cigarette module, the side shield has two and sets up the left and right sides on the panel respectively, the second air intake has been seted up at the position that the side shield corresponds to the panel, the side shield opens or closes the second air intake with overturning, and can block the oil smoke when opening and escape. Also discloses a control method of the range hood. Compared with the prior art, the invention has the advantages that: through setting up the side shield, can open when the oil smoke has the horizontal escape, reach the effect of restraining the coanda effect, can inhale the oil smoke that escapes from the position of opening simultaneously, block the oil smoke from two sides and escape.
Description
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.
The existing side-draft range hood has the defects that when oil smoke is exploded, the oil smoke rises and collides with a side panel, the track of the oil smoke is changed, a part of the oil smoke in the vertical direction rises and is sucked into an air inlet under the guidance of rising force, the suction force of the range hood and the coanda effect, and a part of the side-direction oil smoke escapes transversely along the lower glass of the range hood under the guidance of the coanda effect.
In the prior art, to solve the above problems, there are two main methods:
1) the baffle plates are arranged on two sides of the range hood, and the oil smoke is accumulated at the baffle plates and then enters the air inlet. Chinese patent as application number 201921861731.X discloses a lampblack absorber, including lampblack absorber body, updraft ventilator, oil smoke exhaust pipe, smoke filter includes outer baffle and two curb plates, the articulated lampblack absorber body in outer baffle upper end, the outer baffle corresponds the oil smoke inlet scoop that updraft ventilator has, outer baffle is used for controlling opening and close of oil smoke inlet scoop, two the curb plate is the side reason of the equal fixed connection arc screen panel of the outer baffle both sides of fixed connection and lower extreme respectively.
This kind of mode can increase thereby occupation space of range hood's volume is big, and user experience effect is not good, and some little kitchen space restrictions can't use even, and outward appearance aesthetic property is not enough moreover, still can bring the sensation of oppressing for the user simultaneously.
2) The blowers are arranged below the two sides of the range hood to form an air curtain to prevent the oil smoke from diffusing. As disclosed in the chinese patent with application number 201811107637.5, the housing comprises a housing body, the casing includes the panel, be provided with the air intake that is used for the air inlet on the panel, still include the open-close plate that movably set up, the open-close plate has with the primary importance that the air intake was closed, and general the second place that the air intake was opened, the lampblack absorber still includes the air curtain device, the open-close plate is in right during the primary importance the air curtain device shelters from, the open-close plate is in during the second place the air curtain device exposes and can form the air curtain.
This method is theoretically possible, but the air curtain formed in actual operation blows away the oil smoke, the effect is not good, and the power is increased by adding the blower, and the noise is generated.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a range hood aiming at the defects in the prior art, which improves the smoke gathering effect, has a simple structure and does not need to occupy extra space.
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 casing and the panel of setting in the casing front side, first air intake has been seted up on the upper portion of panel, first air intake department is provided with the cigarette board that keeps off, keep off the cigarette board and open or close first air intake, its characterized in that: the range hood still includes and gathers together the cigarette module, it includes the side shield to gather together the cigarette module, the side shield has two and sets up the left and right sides on the panel respectively, the second air intake has been seted up at the position that the side shield corresponds to the panel, the side shield opens or closes the second air intake with overturning, and can block the oil smoke when opening and escape.
In order to facilitate the function of gathering the smoke and block the oil smoke from escaping, the rotating shaft of the left side baffle is arranged at the left side of the side baffle and longitudinally extends along the front surface of the panel, and the rotating shaft of the right side baffle is arranged at the right side of the side baffle and longitudinally extends along the front surface of the panel.
Preferably, in order to detect the oil smoke escape state and control the side baffle, the smoke collecting module further comprises a horizontal oil smoke detection module for detecting whether oil smoke escapes transversely and controlling the side baffle, the horizontal oil smoke detection module comprises an infrared transmitter and an infrared receiver group for receiving infrared rays transmitted by the infrared transmitter, the infrared transmitter is arranged on the back surface of the smoke baffle facing the shell, and the two infrared transmitters are respectively arranged on the left side and the right side of the back surface of the smoke baffle; the infrared receiver group is arranged on the panel, the infrared receiver group is provided with two groups corresponding to the infrared transmitters and is respectively arranged at the position adjacent to the side baffle plates, the two groups of infrared receiver groups are arranged at the position between the two side baffle plates, and a timer is arranged in each group of infrared receiver group.
In order to facilitate detection of the speed and acceleration of oil smoke escaping and better control the side baffle, the infrared receiver group comprises a first infrared receiver, a second infrared receiver, a third infrared receiver and a fourth infrared receiver, the first infrared receiver, the second infrared receiver, the third infrared receiver and the fourth infrared receiver are arranged at intervals left and right in sequence, the first infrared receiver is furthest away from the corresponding side baffle, and the fourth infrared receiver is closest to the corresponding side baffle.
Preferably, a distance between the first infrared receiver and the second infrared receiver is a, a distance between the second infrared receiver and the third infrared receiver is a, a distance between the third infrared receiver and the fourth infrared receiver is b, and b is greater than a.
In order to accelerate the oil smoke to be sucked into the shell when the oil smoke escape quantity is large, the smoke collecting module further comprises an auxiliary fan, and the auxiliary fan is arranged in the shell and corresponds to the second air inlet.
The technical scheme adopted by the invention for solving the second technical problem is as follows: a control method of the range hood is characterized in that: the method comprises the following steps:
1) starting cooking, opening the range hood, opening the smoke baffle plate and opening the two infrared transmitters, and if the infrared receivers of the two infrared receiver groups are in an open state, proving that no oil smoke transversely escapes, and keeping the side baffle plate in a closed state; otherwise, entering step 2);
2) when oil smoke escapes, the oil smoke firstly passes through a first infrared receiver on the escaping side, so that the first infrared receiver is in a closed state, and a timer arranged in an infrared receiver group records the time; then the oil smoke passes through the second infrared receiver, so that the second infrared receiver is in a closed state, a built-in timer records the time at the moment, and the time difference t1 of the oil smoke passing through the first infrared receiver and the second infrared receiver is obtained, and the speed V1 is a/t1 at the stage; then the oil smoke passes through a third infrared receiver, so that the third infrared receiver is in a closed state, a built-in timer records the time at the moment, and the time difference t2 of the oil smoke passing through the second infrared receiver and the third infrared receiver is obtained, and the speed V2 at the stage is a/(t2-t 1); then, the blower system and the auxiliary fan inside the case are controlled according to the sizes of V1 and V2, and corresponding operations are performed.
Preferably, in step 2):
2.1) if V2 is equal to V1, the timer is cleared, and V1 and V2 are compared with a preset threshold value V to carry out corresponding control:
2.1.1) if V2 is not more than V of V1, opening the side baffle, absorbing escaping oil smoke by a fan system in the shell after the oil smoke passes through the fourth infrared receiver, and after the escaping oil smoke is completely absorbed, opening all the four infrared receivers and closing the side baffle (41) on the corresponding side;
2.1.2) if V2 is V1 is larger than V, the side baffle is opened, an auxiliary fan arranged in the corresponding second air inlet is started, and escaping oil smoke is absorbed in an auxiliary mode; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates on the corresponding sides are closed;
2.2) if V2 is larger than V1, the timer continues to count time, when the oil smoke passes through the fourth infrared receiver, the time t3 is recorded, the acceleration a0 of the oil smoke from the third infrared receiver to the fourth infrared receiver is (V3-V2)/(t3-t2), and the speed V3 when the oil smoke passes through the fourth infrared receiver is obtained through calculation; comparing the V3 with the V, controlling a fan system and an auxiliary fan in the shell, and executing corresponding operation;
2.3) if V2 < V1, comparing V1 with V, controlling a fan system and an auxiliary fan in the shell and executing corresponding operation.
Preferably, in step 2.2):
2.2.1) if V3 is less than or equal to V, opening the side baffle, absorbing escaping oil smoke by a fan system in the shell, and after the escaping oil smoke is completely absorbed, completely opening the four infrared receivers and closing the side baffle on the corresponding side;
2.2.2) if V3 is larger than V, the side baffle is opened, an auxiliary fan arranged in the corresponding second air inlet is started to assist in absorbing escaped oil smoke; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates on the corresponding sides are closed;
preferably, in step 2.3):
2.3.1) if V1 is less than V, the timer is closed, when the oil smoke passes through the fourth infrared receiver, the fourth infrared receiver becomes a closed state, the side baffle on the corresponding side is opened at the moment, and the escaped oil smoke is absorbed by a fan system in the shell; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates on the corresponding sides are closed;
2.3.2) if V1 > V, then V2 and V are compared to perform the corresponding control:
2.3.2.1) if V2 < V, the timer is closed, when the oil smoke passes through the fourth infrared receiver, the fourth infrared receiver becomes a closed state, the side baffle at the corresponding side is opened, and the escaped oil smoke is absorbed by the fan system in the shell; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates on the corresponding sides are closed;
2.3.2.2) if V2 is larger than V, the timer continues timing, when the oil smoke passes through the fourth infrared receiver, the time t3 is recorded, the acceleration a0 of the oil smoke from the third infrared receiver to the fourth infrared receiver is (V3-V2)/(t3-t2), and then the speed V3 when the oil smoke passes through the fourth infrared receiver is obtained through calculation; and comparing V3 with V to control correspondingly:
2.3.2.2.1) if V3 is not more than V, the side baffle at the corresponding side is opened, the escaping oil smoke is absorbed by a fan system in the shell (1), when the escaping oil smoke is completely absorbed, the four infrared receivers are all opened at the moment, and the side baffle at the corresponding side is closed;
2.3.2.2.2) if V3 > V, the side baffle of the corresponding side is opened, the auxiliary fan is opened to assist in absorbing the escaping oil smoke, and after the escaping oil smoke is completely absorbed, the four infrared receivers are all opened at the moment, and the side baffle of the corresponding side is closed.
Compared with the prior art, the invention has the advantages that: by arranging the side baffle, the side baffle can be opened when the oil smoke escapes transversely, the effect of inhibiting the wall attachment effect is achieved, and meanwhile, the escaped oil smoke can be sucked from the opened position to block the oil smoke from escaping from two aspects; the cigarette collecting module is convenient to install and does not need to occupy extra space; corresponding control is carried out by calculating the speed and the acceleration of the oil smoke escaping, so that the side baffle, the fan system and the auxiliary fan are more reasonably controlled, and the oil smoke is prevented from escaping.
Drawings
Fig. 1 is a schematic view of a range hood in a closed state according to an embodiment of the present invention;
FIG. 2 is a front view of a range hood in a closed state according to an embodiment of the present invention;
FIG. 3 is a schematic view of a smoke barrier of the range hood according to the embodiment of the present invention;
fig. 4 is a schematic view of an open state 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 to 4, a range hood is a side-draft range hood, and includes a housing 1 and a panel 2 disposed at the front side of the housing 1, wherein a first air inlet 21 is disposed at the upper portion of the panel 2, and the panel 2 is integrally inclined from top to bottom. The first air inlet 21 is provided with a smoke baffle 3, and the smoke baffle 3 can open or close the first air inlet 21 in a turnover manner. A fan system (not shown) may be disposed within the housing 1. Alternatively, the smoke barrier 3 may also translationally open or close the first air inlet 21. When the smoke barrier 3 is in an open state, it is located in front of the first air inlet 21.
The range hood further comprises a smoke gathering module, and the smoke gathering module comprises a side baffle 41, a horizontal oil smoke detection module and an auxiliary fan. The side guards 41 are provided in two numbers, respectively, on the left and right sides of the panel 2, and the side guards 41 are rotatably connected to the panel 2 to be rotatable with respect to the panel 2. The panel 2 may have a second air inlet 22 at a position corresponding to the side baffle 41, so that the side baffle 41 may be embedded in the panel 2, and when the side baffle 41 is in an unopened state, the front surface of the whole panel 2 is a plane, and when the side baffle 41 is opened, the oil smoke may enter the casing 1 from the second air inlet 22. The rotational axis of the left side fence 41 is disposed on the left side of the side fence 41 and extends longitudinally along the front surface of the panel 2 with its inclination direction coinciding with the panel 2. The rotational axis of the right side fence 41 is disposed on the right side of the side fence 41 and extends longitudinally along the front surface of the panel 2 with its inclination direction coinciding with the panel 2. The smoke baffle 3 and the side baffle 41 can rotate relative to the panel 2 by being driven by a common motor, an electric push rod and the like. The auxiliary fans are provided with two, which are respectively arranged in the housing 1 and correspond to each second air inlet 22, and are used for sucking escaping oil smoke into the housing 1 from the corresponding second air inlet 22.
The horizontal oil smoke detection module comprises an infrared emitter 42 and an infrared receiver group 43, detects and calculates the speed and the acceleration of the generated horizontal escaping oil smoke passing through the infrared receiver group 43, and mutually combines to judge whether the side baffle 41 needs to be opened, whether the suction force of the range hood at the first air inlet 21 is enough, and whether a built-in auxiliary fan needs to be opened to cooperate with the sucking of the escaping oil smoke.
Wherein, infrared emitter 42 sets up the back in keeping off cigarette board 3 towards casing 1, and infrared emitter 42 has two, sets up the left and right sides at keeping off the back of cigarette board 3 respectively. The infrared receiver group 43 is provided on the panel 2, and the infrared receiver group 43 has two groups, which are respectively provided adjacent to the side fences 41, and the two infrared receiver groups 43 are provided at positions between the two side fences 41. In the present embodiment, preferably, the infrared receiver group 43 may include a first infrared receiver 431, a second infrared receiver 432, a third infrared receiver 433, and a fourth infrared receiver 434, wherein the first infrared receiver 431, the second infrared receiver 432, the third infrared receiver 433, and the fourth infrared receiver 434 are sequentially arranged at a left-right interval, the first infrared receiver 431 is farthest from the corresponding side barrier 41, and the fourth infrared receiver 434 is closest to the corresponding side barrier 41. Preferably, the first infrared receiver 431 and the second infrared receiver 432 are spaced apart by a, the second infrared receiver 432 and the third infrared receiver 433 are spaced apart by a, the third infrared receiver 433 and the fourth infrared receiver 434 are spaced apart by b, and b is greater than a, for example, 3 a. Each infrared receiver group 43 has a timer built therein.
For convenience of description, hereinafter, when the infrared receiver group 43 can receive a signal of the infrared transmitter 42, it is recorded that the current infrared receiver is in an open state, and when the infrared receiver group 43 cannot receive the signal due to the blocking of the oil smoke, it is recorded that the current infrared receiver is in a closed state.
Referring to fig. 2, the lowermost arrow indicates rising oil smoke, the upper arrow indicates oil smoke sucked by the first air inlet 21, and the arrow pointing to the left indicates oil smoke that escapes horizontally due to the coanda effect. The specific detection control is as follows: the diffusion state of the oil smoke is judged according to the acceleration and the speed. Firstly, judging whether the oil smoke is in uniform speed or acceleration or deceleration motion at the acceleration, if the oil smoke is in uniform speed, only the initial speed, namely the speed between the first infrared receiver 431 and the second infrared receiver 432 is needed to be compared with a preset threshold value V, if the initial speed is greater than the threshold value V, the auxiliary air inlet of the built-in auxiliary fan module needs to be started, otherwise, the oil smoke overflows at the side baffle plate 41 when the escape speed of the transverse oil smoke is too high, and if the speed is less than the threshold value V, the auxiliary fan for auxiliary air suction does not need to be started. If the acceleration motion is performed, the relationship between the initial speed between the first infrared receiver 431 and the second infrared receiver 432 and the threshold V needs to be determined, and if the initial speed is greater than the threshold V, the speed of the first infrared receiver 431 and the second infrared receiver 432 reaching the second air inlet 22 after the acceleration motion is inevitably greater, and the auxiliary fan needs to be turned on. If the acceleration is smaller than 0, a deceleration movement is performed, and then the initial velocity between the first infrared receiver 431 and the second infrared receiver 432 is compared, if the acceleration is directly smaller than the threshold V, the velocity at the second air inlet 22 on the arrival side after deceleration is certainly smaller than the threshold V, so that a comparison judgment is not needed at this time, if the initial velocity between the first infrared receiver 431 and the second infrared receiver 432 is compared, if the initial velocity at the second air inlet 22 after deceleration is larger than the threshold V, it is needed to detect whether the velocity at the second air inlet 22 after deceleration is smaller than the threshold V, so that the velocity at which the acceleration reaches the second air inlet 22 needs to be measured and calculated, and then the comparison is performed.
Specifically, the control method of the range hood comprises the following steps:
1) starting cooking, opening the range hood, opening the smoke baffle 3, opening the two infrared transmitters 42, and if the infrared receivers of the two infrared receiver groups 43 are in an open state, proving that no oil smoke escapes transversely, and keeping the side baffle 41 in a closed state; otherwise, entering step 2);
2) when oil smoke escapes, the oil smoke attached to the wall escapes transversely and firstly passes through the first infrared receiver 431 on the escape side (the left or right infrared receiver group 43), so that the first infrared receiver 431 is in a closed state, and a timer arranged in the infrared receiver group 43 records the time; then, the oil smoke passes through the second infrared receiver 432, so that the second infrared receiver 432 is in a closed state, a built-in timer records the time at this time, and the time difference t of the oil smoke passing through the first infrared receiver 431 and the second infrared receiver 432 is obtained1Velocity V at this stage1＝a/t1(ii) a Then the oil smoke passes through the third infrared receiver 433, so that the third infrared receiver 433 is closedIn the closed state, a built-in timer records the time at the moment to obtain the time difference t of the oil smoke passing through the second infrared receiver 432 and the third infrared receiver 4332Velocity V at this stage2＝a/(t2-t1) (ii) a Then according to V1And V2Performs the corresponding operation:
2.1) if V2＝V1I.e. acceleration is equal to 0, the timer is cleared and V is set1And V2And (3) corresponding control is carried out by comparing with a preset threshold value V:
2.1.1) if V2＝V1When the oil smoke passes through the fourth infrared receiver 434, the escaping oil smoke is sucked by a fan system in the shell 1, and when the escaping oil smoke is completely sucked, the four infrared receivers are completely opened, and the side baffles 41 on the corresponding sides are closed;
2.1.2) if V2＝V1When the pressure is higher than V, the side baffle 41 is opened, referring to FIG. 4, the auxiliary fan arranged in the corresponding second air inlet 22 is turned on to assist in absorbing escaping oil smoke; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates 41 on the corresponding sides are closed;
2.2) if V2＞V1When the acceleration is larger than 0, the timer continues to count time, and when the oil smoke passes through the fourth infrared receiver 434, the time t at the moment is recorded3Acceleration a at this stage0＝(V3-V2)/(t3-t2) Then according to the formula b ═ V2t+0.5a0t2The velocity V of the cooking fume passing through the fourth infrared receiver 434 is obtained3(ii) a Will V3And (4) performing corresponding control compared with V:
2.2.1) if V3The side baffles 41 are opened when the pressure is less than or equal to V, referring to fig. 4, escaping oil smoke is sucked by a fan system in the shell 1, when the escaping oil smoke is completely sucked, the four infrared receivers are completely opened, and the side baffles 41 on the corresponding sides are closed;
2.2.2) if V3V, the side baffle 41 is opened, referring to fig. 4, the auxiliary fan arranged in the corresponding second air inlet 22 is started to assist the suction to escapeOil smoke; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates 41 on the corresponding sides are closed;
2.3) if V2＜V1I.e. acceleration < 0, a comparison of V is required1Control is performed in accordance with V:
2.3.1) if V1If the value is less than V, the timer is closed, when the oil smoke passes through the fourth infrared receiver 434, the fourth infrared receiver 434 is changed into a closed state, and at the moment, the side baffle 41 on the corresponding side is opened, referring to FIG. 4, the escaping oil smoke is sucked by a fan system in the shell 1; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates 41 on the corresponding sides are closed;
2.3.2) if V1If V is greater than V, V needs to be compared again2And V to perform corresponding control:
2.3.2.1) if V2If the value is less than V, the timer is closed, when the oil smoke passes through the fourth infrared receiver 434, the fourth infrared receiver 434 is changed into a closed state, and at the moment, the side baffle 41 on the corresponding side is opened, referring to FIG. 4, the escaping oil smoke is sucked by a fan system in the shell 1; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle plates 41 on the corresponding sides are closed;
2.3.2.2) if V2When the oil smoke passes through the fourth infrared receiver 434, the time t is recorded3Acceleration a at this stage0＝(V3-V2)/(t3-t2) Then according to the formula b ═ V2t+0.5a0t2The velocity V of the cooking fume passing through the fourth infrared receiver 434 is obtained3(ii) a Will V3And (4) performing corresponding control compared with V:
2.3.2.2.1) if V3When the oil smoke is not more than V, the side baffles 41 on the corresponding sides are opened, referring to fig. 4, the escaping oil smoke is sucked by a fan system in the shell 1, and after the escaping oil smoke is completely sucked, the four infrared receivers are all opened at the moment, and the side baffles 41 on the corresponding sides are closed;
2.3.2.2.2) if V3V, the side shutter 41 of the corresponding side is opened, see figure 4,the auxiliary fan is started to assist in absorbing escaped oil smoke, and when the escaped oil smoke is completely absorbed, the four infrared receivers are all opened, and the side baffle plates 41 on the corresponding sides are closed.
Claims (10)
1. The utility model provides a range hood, includes casing (1) and panel (2) of setting in casing (1) front side, first air intake (21) have been seted up on the upper portion of panel (2), first air intake (21) department is provided with keeps off cigarette board (3), keep off cigarette board (3) and can open or close first air intake (21), its characterized in that: the range hood further comprises a smoke gathering module, the smoke gathering module comprises two side baffles (41), the two side baffles (41) are respectively arranged on the left side and the right side of the panel (2), the panel (2) is provided with second air inlets (22) at positions corresponding to the side baffles (41), and the side baffles (41) open or close the second air inlets (22) in a turnover manner and can block oil smoke from escaping when being opened;
the smoke gathering module further comprises a horizontal smoke detection module used for detecting whether smoke transversely escapes to control the side baffle (41), the horizontal smoke detection module comprises an infrared emitter (42) and an infrared receiver group (43) used for receiving infrared rays emitted by the infrared emitter (42), the infrared emitter (42) is arranged on the back surface, facing the inside of the shell (1), of the smoke blocking plate (3), and the two infrared emitters (42) are respectively arranged on the left side and the right side of the back surface of the smoke blocking plate (3); the infrared receiver group (43) is arranged on the panel (2), the infrared receiver group (43) is provided with two groups corresponding to the infrared transmitters (42) and is respectively arranged at the adjacent position of the side baffle plates (41), the two groups of infrared receiver groups (43) are arranged at the position between the two side baffle plates (41), and a timer is arranged in each group of infrared receiver group (43).
2. The range hood of claim 1, wherein: the rotational axis of the left side fence 41 is disposed on the left side of the side fence 41 and extends longitudinally along the front surface of the panel 2, and the rotational axis of the right side fence 41 is disposed on the right side of the side fence 41 and extends longitudinally along the front surface of the panel 2.
3. The range hood of claim 1 or 2, wherein: the infrared receiver group (43) comprises a first infrared receiver (431), a second infrared receiver (432), a third infrared receiver (433) and a fourth infrared receiver (434), wherein the first infrared receiver (431), the second infrared receiver (432), the third infrared receiver (433) and the fourth infrared receiver (434) are sequentially arranged at left and right intervals, the first infrared receiver (431) is furthest away from the corresponding side baffle (41), and the fourth infrared receiver (434) is closest to the corresponding side baffle (41).
4. The range hood of claim 3, wherein: the distance between the first infrared receiver (431) and the second infrared receiver (432) is a, the distance between the second infrared receiver (432) and the third infrared receiver (433) is also a, the distance between the third infrared receiver (433) and the fourth infrared receiver (434) is b, and b is greater than a.
5. The range hood of claim 4, wherein: the cigarette gathering module further comprises an auxiliary fan, and the auxiliary fan is arranged in the shell (1) and corresponds to the second air inlet (22).
6. The range hood of claim 1 or 2, wherein: the cigarette gathering module further comprises an auxiliary fan, and the auxiliary fan is arranged in the shell (1) and corresponds to the second air inlet (22).
7. A control method of a range hood as claimed in claim 5, wherein: the method comprises the following steps:
1) cooking is started, the range hood is opened, the smoke baffle (3) is opened, the two infrared transmitters (42) are opened, if the infrared receivers of the two infrared receiver groups (43) are in an opened state, no oil smoke escapes transversely, and the side baffle (41) is kept in a closed state; otherwise, entering step 2);
2) when oil smoke escapes, the oil smoke firstly passes through the first infrared receiver (431) on the escape side, so that the first infrared receiver (431) is in a closed state, and a timer arranged in an infrared receiver group (43) records the time; then the oil smoke passes through the second infrared receiver (432), so that the second infrared receiver (432) is in a closed state, a built-in timer records the time, and the time difference t1 of the oil smoke passing through the first infrared receiver (431) and the second infrared receiver (432) is obtained, and the speed V1 is a/t 1; then the oil smoke passes through the third infrared receiver (433), so that the third infrared receiver (433) is in a closed state, a built-in timer records the time, and the time difference t2 of the oil smoke passing through the second infrared receiver (432) and the third infrared receiver (433) is obtained, and the speed V2 is a/(t2-t 1); then, the blower system and the auxiliary fan inside the casing (1) are controlled according to the sizes of V1 and V2, and corresponding operations are performed.
8. The control method of the range hood according to claim 7, characterized in that: in step 2):
2.1) if V2 is equal to V1, the timer is cleared, and V1 and V2 are compared with a preset threshold value V to carry out corresponding control:
2.1.1) if V2 is equal to or less than V1, the side baffle (41) is opened, the oil smoke passes through the fourth infrared receiver (434), the escaping oil smoke is sucked by a fan system in the shell (1), when the escaping oil smoke is sucked completely, the four infrared receivers are opened completely, and the side baffle (41) on the corresponding side is closed;
2.1.2) if V2 is greater than V1, the side baffle (41) is opened, and the auxiliary fan arranged in the corresponding second air inlet (22) is started to assist in absorbing escaped oil smoke; when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle (41) on the corresponding side is closed;
2.2) if V2 is larger than V1, the timer continues to count time, when the oil smoke passes through the fourth infrared receiver (434), the time t3 is recorded, the acceleration a0 of the oil smoke from the third infrared receiver (433) to the fourth infrared receiver (434) is (V3-V2)/(t3-t2), and then the speed V3 when the oil smoke passes through the fourth infrared receiver (434) is calculated; comparing V3 with V, controlling a fan system and an auxiliary fan in the shell (1), and executing corresponding operation;
2.3) if V2 < V1, comparing V1 with V, controlling a fan system and an auxiliary fan in the shell (1) and executing corresponding operation.
9. The control method of the range hood according to claim 8, characterized in that: in step 2.2):
2.2.1) if V3 is not more than V, opening the side baffle (41), absorbing escaping oil smoke by a fan system in the shell (1), and after the escaping oil smoke is completely absorbed, all the four infrared receivers are opened at the moment, and the side baffle (41) on the corresponding side is closed;
2.2.2) if V3 is larger than V, the side baffle (41) is opened, and an auxiliary fan arranged in the corresponding second air inlet (22) is opened to assist in absorbing escaping oil smoke; when the escaped oil smoke is completely sucked, the four infrared receivers are all opened at the moment, and the side baffle (41) on the corresponding side is closed.
10. The control method of the range hood according to claim 8, characterized in that: in step 2.3):
2.3.1) if V1 is less than V, the timer is closed, when the oil smoke passes through the fourth infrared receiver (434), the fourth infrared receiver (434) becomes a closed state, the side baffle (41) on the corresponding side is opened at the moment, and the escaped oil smoke is absorbed by a fan system in the shell (1); when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle (41) on the corresponding side is closed;
2.3.2) if V1 > V, then V2 and V are compared to perform the corresponding control:
2.3.2.1) if V2 < V, the timer is closed, when the oil smoke passes through the fourth infrared receiver (434), the fourth infrared receiver (434) becomes a closed state, at this time, the side baffle (41) on the corresponding side is opened, and the escaped oil smoke is absorbed by the fan system in the shell (1); when the escaping oil smoke is completely absorbed, the four infrared receivers are completely opened, and the side baffle (41) on the corresponding side is closed;
2.3.2.2) if V2 is larger than V, the timer continues to count time, when the oil smoke passes through the fourth infrared receiver (434), the time t3 is recorded, the acceleration a0 of the oil smoke from the third infrared receiver (433) to the fourth infrared receiver (434) is (V3-V2)/(t3-t2), and then the speed V3 when the oil smoke passes through the fourth infrared receiver (434) is calculated; and comparing V3 with V to control correspondingly:
2.3.2.2.1) if V3 is not more than V, the side baffle (41) at the corresponding side is opened, the escaping oil smoke is absorbed by a fan system in the shell (1), when the escaping oil smoke is completely absorbed, the four infrared receivers are all opened, and the side baffle (41) at the corresponding side is closed;
2.3.2.2.2) if V3 > V, the side baffle (41) of the corresponding side is opened, the auxiliary fan is started to assist in absorbing the escaping oil smoke, and after the escaping oil smoke is completely absorbed, the four infrared receivers are all opened at the moment, and the side baffle (41) of the corresponding side is closed.
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| CN115253568B (en) * | 2022-09-28 | 2022-12-16 | 山东豪迈数控机床有限公司 | Air inlet structure of oil mist treatment device and oil mist treatment device |
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