CN114636179B - Fume exhaust fan and control method thereof - Google Patents
Fume exhaust fan and control method thereof Download PDFInfo
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- CN114636179B CN114636179B CN202210313559.4A CN202210313559A CN114636179B CN 114636179 B CN114636179 B CN 114636179B CN 202210313559 A CN202210313559 A CN 202210313559A CN 114636179 B CN114636179 B CN 114636179B
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- range hood
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000003517 fume Substances 0.000 title description 2
- 239000000779 smoke Substances 0.000 claims abstract description 203
- 230000007246 mechanism Effects 0.000 claims abstract description 65
- 238000010411 cooking Methods 0.000 claims abstract description 15
- 230000006870 function Effects 0.000 claims abstract description 15
- 230000001939 inductive effect Effects 0.000 claims abstract description 7
- 230000004888 barrier function Effects 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 claims description 12
- 230000002441 reversible effect Effects 0.000 claims description 12
- 230000000007 visual effect Effects 0.000 claims description 12
- 230000009471 action Effects 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 13
- 235000019504 cigarettes Nutrition 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention relates to a range hood and a control method thereof, comprising the following steps: a housing; the smoke baffle is arranged on the shell in a deflectable way and at least has a closed state and an open state; the infrared sensor assembly is arranged on the smoke baffle and is used for acquiring a distance signal between an inductive object which is blocked in front of the infrared sensor assembly and the sensor assembly; and the controller is electrically connected with the driving mechanism and the infrared sensor assembly, and is used for controlling the driving mechanism to start and continuously act when the sensing object is positioned in the first set distance range and the residence time T reaches the set time T, and controlling the driving mechanism to stop acting when the sensing object is positioned outside the first set distance range. The distance signal obtained by the infrared sensor assembly is utilized to manually adjust the opening angle of the smoke baffle plate, so that the smoke baffle plate is matched with different cooking states, a good smoke gathering effect is achieved, and the smoke baffle plate is particularly suitable for the operation habits of users with different heights, so that the users can operate the smoke baffle plate to switch other functions of the range hood more conveniently.
Description
Technical Field
The invention relates to the technical field of range hoods, in particular to a range hood and a control method thereof.
Background
A range hood is a kitchen appliance that purifies the kitchen environment. The European style range hood in the market is divided into a top-suction type range hood and a near-suction type range hood. The top-draft type range hood utilizes the principle of rising hot gas to suck and exhaust the naturally rising oil smoke generated during cooking, and has wider and wider application due to the advantages of neatness, light weight, small occupied space and the like, but the suction effect of the power source is reduced due to the fact that the power source is far away from the cooking bench, and the oil smoke cannot be completely sucked. The near-suction type range hood is far away by utilizing vortex wind pressure, most of oil smoke near the cooking bench is absorbed in an arc form, adverse effects on human health can be reduced, the power source is near to the cooking bench, the suction effect of the power source is basically not reduced, and the oil smoke can not be absorbed by a small number of oil smoke escaping upwards due to the fact that the rising speed of the oil smoke is high.
In order to meet the requirements of the design attractiveness and consistency of the kitchen style, the top-suction type smoke exhaust ventilator is ideally arranged for the kitchen and is completely hidden and arranged in the kitchen hanging cabinet, so that the overall appearance style of the hanging cabinet is not affected, and the storage space of the hanging cabinet is saved. Based on the installation design, the control part of the range hood can only be arranged on the bottom surface of the machine body, and the gesture switch can be used for identifying user operation in consideration of visual obstruction of the position, but the gesture switch is easily influenced by light and darkness to start the range hood by misoperation, and complex gesture identification is difficult to define and needs operation keys for assistance.
Therefore, chinese patent application with application number 201910003144.5 (application publication number CN109631119 a) discloses an embedded smoke machine controlled by a gesture switch, which comprises a machine body, a fan, a smoke guide plate and a driving mechanism, wherein the smoke guide plate is positioned at the front side of the bottom surface of the machine body, two ends of the smoke guide plate are provided with convex shafts matched with the machine body, the driving mechanism drives the smoke guide plate to vertically deflect around the convex shafts, the gesture switch and a plurality of operation keys are arranged on the smoke guide plate, the gesture switch is used for detecting gesture actions of a user to trigger starting, the smoke guide plate deflects downwards from a closing position close to the bottom surface of the machine body after starting, and the fan starts to operate. The range hood is embedded in the hanging cabinet, the overall appearance style of the hanging cabinet is not affected, the gesture switch is arranged on the smoke guide plate which can be folded relative to the bottom side of the machine body, the driving mechanism on the smoke guide plate is started to enable the smoke guide plate to be unfolded by the bottom side of the machine body when the hand action is detected, meanwhile, the fan is started to work, and in addition, the smoke guide plate can also serve as an operation panel after being unfolded.
However, the embedded smoke ventilator controlled by the gesture switch in the above patent application has a certain disadvantage, firstly, the current smoke guide plate is basically at a fixed inclination angle after being deflected and opened, and cannot be well adapted to different cooking conditions so as to ensure the smoke exhaust effect, and particularly, the smoke exhaust effect cannot be well matched with the operation habits of users with different heights, for example, when the opening angle of the smoke guide plate is larger, the user with relatively low height cannot conveniently operate on the smoke guide plate, and the switching of different functions of the smoke ventilator is realized, therefore, it becomes necessary to design a scheme for enabling the user to manually adjust the smoke guide plate according to the actual environment and personal requirements so as to adapt to the operation habits of users with different heights. Secondly, the above-mentioned smoke guide plate is as an operation panel after deflecting and opening, wherein, set up gesture switch on the smoke guide plate of above-mentioned patent and start and set up a plurality of operating keys and realize other functions (such as gear adjustment) of range hood, because set up relatively more sensing element (such as gesture switch) and operating element on the smoke guide plate, can make the cost of the smoke guide plate as operation panel relatively higher, therefore, how to set up relevant operating keys as far as possible on the smoke guide plate and can realize the effective control of a plurality of functions of range hood better, and then reduce the manufacturing cost of range hood, become the technical problem that the technical personnel who need to solve urgently.
Therefore, the existing range hood needs to be further improved.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide the range hood which enables a user to manually adjust the opening angle of the smoke baffle plate according to the actual environment and personal requirements so as to adapt to the operation habits of users with different heights.
The second technical problem to be solved by the invention is to provide the range hood which can realize the multi-function operation of the range hood on the smoke baffle plate through fewer operation keys so as to reduce the production cost.
The third technical problem to be solved by the invention is to provide a control method of the range hood aiming at the current state of the art.
The invention solves the first technical problem by adopting the technical scheme that: a range hood, comprising:
a housing;
the smoke baffle is driven by the driving mechanism and is arranged on the shell in a deflectable way, and at least has a closed state of being folded relative to the shell and an open state of being unfolded relative to the shell;
the infrared sensor assembly is arranged on the smoke baffle and is used for acquiring a distance signal between an inductive object which is blocked in front of the infrared sensor assembly and the sensor assembly;
and the controller is electrically connected with the driving mechanism and the infrared sensor assembly, and is used for controlling the driving mechanism to start and continuously act when the sensing object is positioned in a first set distance range and the residence time T reaches the set time T, and controlling the driving mechanism to stop acting when the sensing object is positioned outside the first set distance range.
In order to avoid the direct contact of the hands of a user with the surface of the smoke baffle plate in the cooking process, the infrared sensor assembly is polluted, the detection precision of the infrared sensor assembly is affected, and the distance between the sensing object and the infrared sensor assembly is defined as an initial distance in a state that the sensing object touches the position of the infrared sensor assembly on the smoke baffle plate, wherein the first set distance range is larger than the initial distance. .
In order to realize forward and reverse rotation adjustment of the smoke baffle, the infrared sensor assembly comprises a first sensor and a second sensor which are arranged on the smoke baffle at intervals, the controller controls the driving mechanism to drive the smoke baffle to deflect forward according to a distance signal fed back by the first sensor, and controls the driving mechanism to drive the smoke baffle to deflect reversely according to a distance signal fed back by the second sensor.
In order to enable the smoke baffle to be adjusted within a set effective deflection angle range and avoid entering a state with poor smoke collecting effect (such as tilting backwards from top to bottom), the driving mechanism comprises a driving motor and a connecting rod mechanism, wherein the power input end of the connecting rod mechanism is connected with the output shaft of the driving motor, and the power output end of the connecting rod mechanism is connected with the smoke baffle;
the range hood further comprises a current signal detection device for detecting a current signal of the driving motor, and the controller is electrically connected with the current signal detection device and controls the driving motor to stop acting when the smoke baffle is in a vertical state in the reverse deflection process of the smoke baffle through the received current signal.
According to the opening and closing characteristics of the smoke baffle, the driving motor is set to be forward current when the smoke baffle is opened, and then the smoke baffle is necessarily reverse current when the smoke baffle is recovered. Meanwhile, according to the actual situation, the current of the driving motor gradually increases from a certain value I0 to I1 when the smoke baffle is opened, the operation is stopped at a limit position (maximum opening position), and in the gradually changed current value, the current of the cut smoke baffle is a marking current Im when the smoke baffle is in a vertical position, so that signals of the infrared sensor assembly are invalid when the current is between I0 and I m.
That is, when the smoke barrier is in the vertical state, the influence of gravity on the rotation resistance of the smoke barrier is minimum, and is equal to the starting torque of the motor, the detection current value is at the minimum value, and the minimum current value can be set as the flag current. In the reverse rotation process of the smoke baffle, if a user still shields the infrared sensor assembly, the power supply board is set to prevent the infrared sensor assembly from being invalid when the power supply board detects the motor to be at the minimum current because the driving motor needs to increase the current to do work, and the smoke baffle does not rotate inwards any more. Because the smoke baffle plate is rotated again, the smoke baffle plate and the table top of the kitchen range form an acute angle, the oil smoke absorbing effect is obviously reduced, and meanwhile, the gestures of a user are also unreasonable, so that the user experience is reduced.
The invention solves the second technical problem by adopting the technical proposal that: and the controller sends out a command for switching the range hood to different functions according to different distance signals fed back by the sensor assembly.
The above-mentioned range hood's "different functions" can refer to gear adjustment function, also can refer to functions such as control adjustment of the amount of wind of controlling the side, automatically cleaning mode are adjusted, preferably, range adjustment of range hood is comparatively frequent, and necessary in the in-service use, for this reason, be equipped with the fan in the casing, when the response object is in the dwell time T1 of second settlement range of distance reaches settlement time T1, the controller control the fan carries out gear adjustment, wherein, second settlement range of distance is different with first settlement range of distance.
The second set distance range may be another set distance range that the sensing object does not contact with the surface of the smoke baffle, that is, the gear adjustment of the fan may also be a "non-contact" adjustment mode, but in order to be clearly distinguished from the angle adjustment mode of the smoke baffle, so as to improve the use experience of the user, the second set distance range is a distance defined between the sensing object and the infrared sensor assembly in a state that the sensing object contacts the surface of the smoke baffle.
In order to remind the user that the gear adjustment is completed, the user is timely fed back in the operation process, and the device also comprises an audible and visual alarm device for reminding the user that the gear of the fan is completed in the upshift adjustment or the downshift adjustment.
In order to realize the opening and closing of the range hood, the first sensor and the second sensor both comprise a signal transmitting element for transmitting infrared signals and a signal receiving element for receiving the reflected infrared signals, and the controller acquires a hand waving sensing signal by comparing whether the time difference of the infrared reflected signals of the sensing objects acquired by the first sensor and the second sensor is within a set time range or not, so that the range hood is controlled to execute the starting or closing action.
In order to ensure the smoke collecting effect of the smoke baffle in the open state and the aesthetic property of the smoke baffle in the closed state, particularly to facilitate the function switching operation of the range hood by a user through the open smoke baffle, the smoke baffle is positioned in the open state, and at least part of the smoke baffle is positioned outside the vertical projection of the shell on the horizontal plane;
when the smoke baffle is in the folding state, the smoke baffle is folded at the bottom of the shell and is basically horizontally arranged.
As another preferred embodiment, in order to realize automatic starting of the range hood, the infrared sensor assembly is further used for acquiring temperature information of a cooking area below the casing, and the controller is used for controlling the range hood to start according to the acquired temperature information and controlling the smoke baffle to deflect to the open state.
The invention solves the third technical problem by adopting the technical scheme that: the control method of the range hood is characterized by comprising the following steps:
s1, starting the range hood, and enabling a driving mechanism to act to drive a smoke baffle plate to deflect from a folded state to an opened state;
s2, when the hands of the user are shielded on the front side of the infrared sensor assembly, and the distance between the hands of the user and the infrared sensor assembly is within a first set distance range, the infrared sensor assembly recognizes the distance, when the residence time T of the hands of the user within the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle to deflect forward or reversely, and when the infrared sensor assembly detects that the distance between the hands of the user and the infrared sensor assembly is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle is kept at the position;
s3, when the hands of the user are shielded on the front side of the infrared sensor assembly and the distance between the hands of the user and the infrared sensor assembly is within a second set distance range, the infrared sensor assembly recognizes the distance, and when the infrared sensor assembly detects that the residence time T1 of the hands of the user within the second set distance range reaches the set time T1, the rotating speed of the fan is changed to perform gear adjustment, and after the gear adjustment is completed, the audible and visual alarm device sends a signal to remind the user that the gear adjustment is completed;
s4, under the running state of the range hood, acquiring a waving sensing signal through an infrared sensor assembly arranged on the smoke baffle plate, judging whether the acquired waving sensing signal belongs to a target waving sensing signal, and if so, controlling the range hood to be closed, and driving a driving mechanism to act so as to drive the smoke baffle plate to deflect from an open state to a closed state.
In order to achieve forward and reverse adjustment of the smoke barrier by using the infrared sensor assembly, the infrared sensor assembly comprises a first sensor and a second sensor which are arranged on the smoke barrier at intervals;
the step S2 includes the following steps:
s21, when the hand of the user is shielded at the front side of the first sensor, and the distance between the hand of the user and the first sensor is within a first set distance range, the first sensor recognizes the first sensor, and when the residence time T of the hand of the user within the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle to deflect from inside to outside, and when the first sensor detects that the distance between the hand of the user and the first sensor is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle is kept at the position;
s22, when the hand of the user is shielded at the front side of the second sensor, and the distance between the hand of the user and the second sensor is within a first set distance range, the second sensor recognizes the first set distance range, and when the residence time T of the hand of the user within the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle to deflect from outside to inside, and when the second sensor detects that the distance between the hand of the user and the second sensor is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle is kept at the position.
As an improvement, the step S22 further includes the steps of:
in the process of deflecting the smoke baffle plate from outside to inside, the current signal detection device detects a current signal of the driving motor, and the driving motor is controlled to stop acting when being positioned in a vertical state in the process of reversely deflecting the smoke baffle plate through the received current signal.
If the smoke baffle continues to rotate beyond the vertical state in the reverse rotation process, the smoke baffle and the table top of the kitchen range form an acute angle, the smoke absorbing effect is obviously reduced, meanwhile, gestures of a user are unreasonable, and the user experience is reduced.
In order to implement upshift adjustment and downshift adjustment of the blower using the same infrared sensor assembly, the step S3 described above includes the steps of:
s31, when the hand of the user is shielded at the front side of the first sensor, and the distance between the hand of the user and the first sensor is in a second set distance range, the first sensor recognizes the distance, and when the first sensor detects that the residence time T1 of the hand of the user in the second set distance range reaches the set time T1, the rotating speed of the fan is changed, a gear is increased, and after the upshift adjustment is completed, the audible and visual alarm device sends out a signal to remind the user that the gear adjustment is completed;
s32, when the hand of the user is shielded at the front side of the second sensor, and the distance between the hand of the user and the second sensor is in a second set distance range, the second sensor recognizes the distance, and when the second sensor detects that the residence time T1 of the hand of the user in the second set distance range reaches the set time T1, the fan rotating speed is changed, one gear is lowered, and after the completion of the downshift adjustment, the audible and visual alarm device sends out a signal to remind the user that the current gear adjustment is completed.
In order to facilitate the user to have obvious distinction between the angle adjustment of the smoke baffle and the gear adjustment of the range hood fan in the actual operation process, so as to improve the use experience of the user, in the step S2, when the distance between the hand of the user and the infrared sensor assembly is in the state of the first set distance range, the hand of the user is not contacted with the smoke baffle;
in the above-described step S3, when the distance between the user 'S hand and the infrared sensor assembly is in the second set distance range, the user' S hand is always in contact with the smoke barrier.
As an improvement, the method comprises the following steps:
the range hood is started in the following manner:
acquiring a waving sensing signal through an infrared sensor assembly arranged on the smoke baffle plate, judging whether the acquired waving sensing signal belongs to a target waving sensing signal, and if so, controlling the starting of the range hood, and driving the smoke baffle plate to deflect from a closing state to an opening state by the action of a driving mechanism; or (b)
The infrared sensor assembly arranged on the smoke baffle plate is used for acquiring temperature information of a cooking area below the machine shell, judging whether the acquired temperature information belongs to target temperature information, if so, controlling the starting of the range hood, and controlling the driving mechanism to act so as to drive the smoke baffle plate to deflect from a folded state to an opened state.
On the basis of keeping the 'waving hand induction' to start the range hood, under the closed state, the infrared rays generated by heating the cooker replace the radiation equivalent reflected by waving hands by utilizing the characteristic of the embedded level (approximately horizontal state) of the smoke baffle, so that the range hood can be automatically started (automatic detection function), and the use experience of a user is improved.
Compared with the prior art, the invention has the advantages that:
1. the user can utilize the distance signal "manual" that infrared sensor subassembly obtained to adjust the opening angle of cigarette baffle, makes the opening angle of cigarette baffle and different culinary art states assorted, reaches better effect of gathering together the cigarette, especially, adapts to the operation habit of the user of different heights, makes the user can more conveniently operate the cigarette baffle and switches or carry out other functions of range hood.
2. In the preferred scheme, in the process of manually adjusting the opening angle of the smoke baffle by a user, the hand (used as an induction object) of the user does not actually contact the smoke baffle, but only follows the smoke baffle or is positioned on the front side of the smoke baffle in a traction mode, so that the problem that the user directly contacts the smoke baffle to be stained with greasy dirt is avoided, the interactivity between the user and the range hood is improved, and the practical experience of the user is greatly improved.
3. In another preferred scheme, the sensing objects which can be identified by the same group of infrared sensor assemblies are positioned in different distance ranges to serve as resolution signals, so that the smoke baffle angle adjusting function and the air quantity adjusting function of the range hood are independently realized, and on the basis, the infrared sensor assemblies can also acquire the hand waving sensing signals to realize the starting and shutdown functions of the range hood.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention (a smoke baffle of a range hood is in a folded state);
fig. 2 is a schematic perspective view of an embodiment of the present invention (a smoke baffle of a range hood is in an open state);
FIG. 3 is a vertical cross-sectional view of FIG. 1 taken in a front-to-rear direction;
FIG. 4 is a vertical cross-sectional view of FIG. 2 taken in a front-to-rear direction;
fig. 5 is a flowchart of a control method of a range hood according to an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
In the description and claims of the present invention, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the invention may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.
Referring to fig. 1-5, the range hood includes a cabinet 10, a fan 11 system, a smoke baffle 20, and a controller. Wherein, the fan 11 system is arranged in the shell 10 and is used for providing negative pressure for sucking and exhausting oil smoke. The bottom of the casing 10 is provided with an air inlet 100, and the smoke baffle 20 is rotatably arranged at the front side of the bottom of the casing 10 by a driving mechanism. The smoke baffle 20 has a closing state that the casing 10 is folded and an opening state that the smoke baffle 20 is unfolded relative to the casing 10 in the rotating process, wherein in the closing state, the smoke baffle 20 is shielded at an air inlet 100 at the bottom of the casing 10 and is basically horizontally arranged, so that the attractiveness of the range hood in the closing state is ensured; in the opened state, at least the front portion of the smoke baffle 20 is located outside the vertical projection of the casing 10 on the horizontal plane, and preferably, the smoke baffle 20 is inclined forward from top to bottom in the opened state, so that the smoke collecting effect of the range hood is ensured.
Referring to fig. 1 and 2, the range hood according to the present embodiment is entirely hidden in a hanging cabinet 30 of a kitchen, wherein the smoke baffle 20 can be used as an operation panel for a user to operate after being opened.
Referring to fig. 3 and 4, the deflecting action of the smoke barrier 20 is achieved by the driving engagement of the driving motor 22 and the link mechanism 23. Specifically, left and right end portions of one side of the smoke barrier 20 are hinged to the casing 10 by a shaft 200 on the same line, a power input end of the link mechanism 23 is connected to an output shaft of the driving motor 22, and a power output end of the link mechanism 23 is connected to a rear surface of the smoke barrier 20. The manner of driving the smoke baffle 20 to act through the transmission cooperation of the driving motor 22 and the link mechanism 23 is the prior art, and is not described herein.
The front surface of the smoke barrier 20 is provided with an infrared sensor assembly 21, and specifically, in the present embodiment, the infrared sensor assembly 21 includes a first sensor 211 and a second sensor 212 that are disposed at intervals in the left-right direction of the smoke barrier 20. Specifically, each of the first sensor 211 and the second sensor 212 includes a signal transmitting element for emitting an infrared signal and a signal receiving element for receiving the reflected infrared signal. Among them, the infrared sensor assembly 21 has various commonalities in the present embodiment, specifically as follows: the first sensor 211 and the second sensor 212 may be used to obtain a distance signal between an inductive object (the inductive object may be a user's hand or another object such as a cooker held by the user) and the first sensor 211 or the second sensor 212; the hand waving sensing signal can also be obtained by comparing whether the time difference of the infrared reflection signals of the sensing object obtained by the first sensor 211 and the second sensor 212 in sequence is within a set time range; and may also be used to obtain temperature information of a cooking area located under the cabinet 10.
The principle of the infrared sensor assembly 21 for recognizing different distance signals of the sensing object is as follows: the signal emitting elements of the first sensor 211 and the second sensor 212 can emit infrared light with certain equivalent, after being blocked by sensing objects positioned in front of the sensor and at different distances, the emitted infrared light can be reflected back and recognized by the signal receiving element of the corresponding sensor, wherein the equivalent of the infrared light reflected back by the sensing objects positioned in front of the sensor at different distances is also different, for example, the sensor can emit 1000 equivalent of infrared light, and the infrared light with 300-700 equivalent can be reflected by far-distance waving or staying; but the shielding or stopping of the sensing object at a close distance (e.g., where the user's hand touches the surface of the smoke baffle 20 corresponding to the sensor) may reflect more than 800 equivalents of infrared light.
In the present embodiment, in a state where the sensing object touches the smoke baffle 20 at the position where the infrared sensor assembly 21 is located, the distance between the sensing object and the infrared sensor assembly 21 is defined as an initial distance (an initial distance in the present embodiment, that is, a second set distance for controlling the gear of the fan, which will be described later in detail), wherein the first set distance range is larger than the initial distance.
In this embodiment, whether the distance signal between the infrared sensor assembly 21 and the sensing object is within the first set distance range and the second set distance range is taken as a distinction, so that specific control on the angle adjustment of the smoke baffle 20 and the gear adjustment of the fan 11 is respectively realized, which will be described in detail below.
The above manner and working principle of obtaining the hand waving sensing signal by comparing whether the time difference of the infrared reflection signals of the sensing object obtained by the first sensor 211 and the second sensor 212 is within the set time range are all the prior art, and are not described herein, and specific reference may be made to "an intelligent range hood" with application publication No. CN112344410 a.
The range hood in this embodiment is started by:
one is to obtain the waving sensing signal through the infrared sensor assembly 21 arranged on the smoke baffle 20, judge whether the waving sensing signal obtained belongs to the target waving sensing signal, if yes, control the starting of the range hood, drive the action of the driving mechanism, drive the smoke baffle 20 to deflect from the folding state to the opening state.
The other is that the infrared sensor assembly 21 arranged on the smoke baffle 20 acquires the temperature information of the cooking area below the machine shell 10, judges whether the acquired temperature information belongs to target temperature information, if so, controls the starting of the range hood, controls the driving mechanism to act, and drives the smoke baffle 20 to deflect from a closing state to an opening state.
That is, the activation of the range hood may be activated by the user's active "waving hand" and when the user does not do so, the infrared sensor assembly 21 on the smoke baffle 20 may also automatically activate the range hood by acquiring temperature information of the cooking area under the cabinet 10.
Likewise, the closing of the range hood can be realized by the initiative 'waving mode' of a user, and the principle of the two modes is the same and is not repeated.
The controller of the present embodiment is electrically connected to the driving mechanism and the infrared sensor assembly 21, and controls the driving mechanism to start and continue to operate when the sensing object is located within the first set distance range and the residence time T reaches the set time T, and controls the driving mechanism to stop operating when the sensing object is located outside the first set distance range (e.g., when the user's hand is put down). Specifically, the controller controls the driving mechanism to drive the smoke baffle 20 to deflect forward according to the distance signal fed back by the first sensor 211, and controls the driving mechanism to drive the smoke baffle 20 to deflect reversely according to the distance signal fed back by the second sensor 212.
In the reverse deflection adjustment process of the smoke baffle 20 through the above manner, if the smoke baffle 20 continues to rotate beyond the vertical state, the smoke baffle 20 and the table top of the kitchen range will be at an acute angle, at this time, the smoke absorbing effect will be remarkably reduced, and meanwhile, the gestures of the user will also become unreasonable, so that the user experience is reduced.
For this purpose, the range hood further comprises current signal detection means for detecting a current signal of the driving motor 22. The controller is electrically connected with the current signal detection device and controls the driving motor 22 to stop acting when the smoke barrier 20 is in the vertical state in the reverse deflection process through the received current signal.
The drive motor 22 is set to be forward current when the smoke barrier 20 is opened according to the opening and closing characteristics of the smoke barrier 20, and then the smoke barrier 20 must be reverse current when recovered. Meanwhile, according to the actual situation, the current of the driving motor 22 gradually increases from a certain value I0 to I1 when the smoke barrier 20 is opened, the operation is stopped at the limit (maximum opening position), the signal of the infrared sensor assembly 21 is invalid when the signal of the infrared sensor assembly 21 is set between I0 and Im when the current value of the current gradually increases and the current value of the smoke barrier 20 is marked current Im when the smoke barrier 20 is in the vertical position.
That is, when the smoke barrier 20 is in the vertical state, the influence of gravity on the rotational resistance of the smoke barrier 20 is minimal, and is equal to the starting torque of the motor, the detected current value is at a minimum value, and the minimum current value can be set as the flag current. During the reverse rotation of the smoke baffle 20, if the user still shields the infrared sensor assembly 21, the smoke baffle 20 does not rotate inwards any more because the driving motor 22 needs to increase current to apply work, and the power panel is set to detect that the motor is at the minimum current, the user shields the infrared sensor assembly 21.
When the residence time T1 of the sensing object in the second set distance range reaches the set time T1, the controller controls the fan 11 to perform gear adjustment, wherein the second set distance range is different from the first set distance range. In order to make the gear adjustment mode of the fan 11 be clearly distinguished from the angle adjustment mode of the smoke baffle 20, so as to improve the user experience, the second set distance range of the present embodiment is the distance defined between the sensing object and the infrared sensor assembly 21 in the state that the sensing object contacts the surface of the smoke baffle 20.
In addition, in order to remind the user that the gear adjustment is completed, the user can timely obtain feedback in the gear adjustment operation process, and the range hood further comprises an audible and visual alarm device for reminding the user that the gear of the fan 11 is completed in gear up adjustment or gear down adjustment.
Referring to fig. 5, the control method of the range hood of the present embodiment is as follows:
s1, starting the range hood in the following mode:
acquiring a waving sensing signal through an infrared sensor assembly 21 arranged on the smoke baffle 20, judging whether the acquired waving sensing signal belongs to a target waving sensing signal, and if so, controlling the starting of the range hood, and driving a driving mechanism to act so as to drive the smoke baffle 20 to deflect from a folded state to an opened state; or (b)
The temperature information of the cooking area below the machine shell 10 is acquired through the infrared sensor assembly 21 arranged on the smoke baffle 20, whether the acquired temperature information belongs to target temperature information is judged, if so, the starting of the range hood is controlled, and the action of the driving mechanism is controlled to drive the smoke baffle 20 to deflect from the folding state to the opening state.
S21, when the opening angle of the smoke baffle 20 needs to be increased, a user can shield the hand on the front side of the first sensor 211, at this time, the distance between the hand of the user and the first sensor 211 is in a first set distance range (in which the hand of the user is not in contact with the smoke baffle 20), the first sensor 211 recognizes that the distance is within the first set distance range, when the residence time T of the hand of the user in the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle 20 to deflect from inside to outside, and when the first sensor 211 detects that the distance between the hand of the user and the first sensor 211 is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle 20 is kept at the position.
S22, conversely, when the opening angle of the smoke baffle 20 needs to be reduced, the user can shield the hand at the front side of the second sensor 212, the distance between the hand of the user and the second sensor 212 is in the first set distance range, the second sensor 212 can recognize the distance, when the residence time T of the hand of the user in the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle 20 to deflect from outside to inside, and when the second sensor 212 detects that the distance between the hand of the user and the second sensor 212 is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle 20 is kept at the position.
In order to avoid the smoke barrier 20 from crossing the hanging state during the folding process, the step S22 further includes the following steps:
during the outward-inward deflection of the smoke barrier 20, the current signal detection device detects the current signal of the driving motor 22, and the driving motor 22 is controlled to stop acting when being in a vertical state during the reverse deflection of the smoke barrier 20 through the received current signal.
And S31, when the upshift adjustment of the fan 11 is required, the user shields the hand on the front side of the first sensor 211, when the distance between the hand of the user and the first sensor 211 is within a second set distance range (when the first distance range is provided, the hand of the user is in contact with the smoke baffle 20), the first sensor 211 recognizes the distance, and when the first sensor 211 detects that the residence time T1 of the hand of the user within the second set distance range reaches the set time T1, the rotating speed of the fan 11 is changed, a gear is increased, and after the upshift adjustment is completed, the audible and visual alarm device sends a signal to remind the user that the gear adjustment is completed.
S32, when the hand of the user is blocked at the front side of the second sensor 212 and the distance between the hand of the user and the second sensor 212 is within a second set distance range, the second sensor 212 recognizes the distance, and when the second sensor 212 detects that the residence time T1 of the hand of the user within the second set distance range reaches the set time T1, the rotating speed of the fan 11 is changed, one gear is lowered, and after the completion of the downshift adjustment, the audible and visual alarm device sends a signal to remind the user that the current gear adjustment is completed.
S4, under the running state of the range hood, the infrared sensor assembly 21 arranged on the smoke baffle 20 is used for acquiring a waving sensing signal, judging whether the acquired waving sensing signal belongs to a target waving sensing signal, and if so, controlling the range hood to be closed, and driving the driving mechanism to act so as to drive the smoke baffle 20 to deflect from an open state to a closed state.
Claims (16)
1. A range hood, comprising:
a housing (10);
a smoke baffle (20) which is driven by a driving mechanism and is arranged on the machine shell (10) in a deflectable way, and at least has a closing state of being folded relative to the machine shell (10) and an opening state of being unfolded relative to the machine shell (10);
characterized by further comprising:
the infrared sensor assembly (21) is arranged on the smoke baffle (20) and is used for acquiring a distance signal between an inductive object which is blocked in front of the infrared sensor assembly (21) and the sensor assembly;
the controller is electrically connected with the driving mechanism and the infrared sensor assembly (21), and is used for controlling the driving mechanism to start and continuously act when the sensing object is positioned in a first set distance range and the residence time T reaches the set time T, and controlling the driving mechanism to stop acting when the sensing object is positioned outside the first set distance range;
in a state that an inductive object touches the position of the infrared sensor assembly (21) on the smoke baffle (20), the distance between the inductive object and the infrared sensor assembly (21) is defined as an initial distance, wherein the first set distance range is larger than the initial distance.
2. The range hood of claim 1, wherein: the infrared sensor assembly (21) comprises a first sensor (211) and a second sensor (212) which are arranged on the smoke baffle (20) at intervals, the controller controls the driving mechanism to drive the smoke baffle (20) to deflect forwards according to a distance signal fed back by the first sensor (211), and controls the driving mechanism to drive the smoke baffle (20) to deflect reversely according to a distance signal fed back by the second sensor (212).
3. The range hood of claim 2, wherein: the driving mechanism comprises a driving motor (22) and a connecting rod mechanism (23), wherein the power input end of the connecting rod mechanism (23) is connected with the output shaft of the driving motor (22), and the power output end of the connecting rod mechanism (23) is connected with the smoke baffle plate (20);
the range hood further comprises a current signal detection device for detecting a current signal of the driving motor (22), wherein the controller is electrically connected with the current signal detection device and controls the driving motor (22) to stop acting when being in a vertical state in the reverse deflection process of the smoke baffle (20) through the received current signal.
4. A range hood according to any one of claims 1 to 3, wherein: and the controller sends out a command for switching the range hood to different functions according to different distance signals fed back by the sensor assembly.
5. The range hood of claim 4, wherein: the novel intelligent control device is characterized in that a fan (11) is arranged in the shell (10), and when the residence time T1 of the sensing object in a second set distance range reaches the set time T1, the controller controls the fan (11) to carry out gear adjustment, wherein the second set distance range is different from the first set distance range.
6. The range hood of claim 5, wherein: the second set distance range is a distance defined between the sensing object and the infrared sensor assembly (21) in a state where the sensing object contacts the surface of the smoke barrier (20).
7. The range hood of claim 5, wherein: the device also comprises an audible and visual alarm device for reminding a user of finishing upshift adjustment or downshift adjustment of the gear of the fan (11).
8. The range hood of claim 2, wherein: the first sensor (211) and the second sensor (212) comprise signal emitting elements for emitting infrared signals and signal receiving elements for receiving the reflected infrared signals, and the controller is used for obtaining a hand waving sensing signal by comparing whether the time difference of the infrared reflection signals of the sensing objects obtained by the first sensor (211) and the second sensor (212) in sequence is within a set time range or not, so that the range hood is controlled to execute starting or shutting down actions.
9. A range hood according to any one of claims 1 to 3, wherein: when the smoke baffle (20) is in the open state, at least part of the smoke baffle (20) is positioned outside the vertical projection of the shell (10) on the horizontal plane;
when the smoke baffle (20) is in a folded state, the smoke baffle (20) is folded at the bottom of the shell (10) and is basically horizontally arranged.
10. The range hood of claim 9, wherein: the infrared sensor assembly (21) is also used for acquiring temperature information of a cooking area below the machine shell (10), and the controller is used for controlling the starting of the range hood according to the acquired temperature information and controlling the smoke baffle (20) to deflect to the open state.
11. A control method of a range hood according to any one of claims 1 to 10, comprising the steps of:
s1, starting the range hood, and enabling a driving mechanism to act to drive a smoke baffle (20) to deflect from a closing state to an opening state;
s2, when the hands of the user are shielded on the front side of the infrared sensor assembly (21), and the distance between the hands of the user and the infrared sensor assembly (21) is within a first set distance range, the infrared sensor assembly (21) recognizes the distance, when the residence time T of the hands of the user within the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle (20) to deflect forward or reversely, and when the infrared sensor assembly (21) detects that the distance between the hands of the user and the infrared sensor assembly (21) is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle (20) is kept at the position;
s3, when the hands of the user are shielded on the front side of the infrared sensor assembly (21) and the distance between the hands of the user and the infrared sensor assembly (21) is within a second set distance range, the infrared sensor assembly (21) recognizes the distance, and when the infrared sensor assembly (21) detects that the residence time T1 of the hands of the user within the second set distance range reaches the set time T1, the rotating speed of the fan (11) is changed to perform gear adjustment, and after the gear adjustment is completed, the audible and visual alarm device sends out a signal to remind the user that the gear adjustment is completed;
s4, under the running state of the range hood, acquiring a waving sensing signal through an infrared sensor assembly (21) arranged on the smoke baffle plate (20), judging whether the acquired waving sensing signal belongs to a target waving sensing signal, and if so, controlling the range hood to be closed, and driving a driving mechanism to act so as to drive the smoke baffle plate (20) to deflect from an open state to a closed state.
12. The control method of a range hood according to claim 11, wherein: the infrared sensor assembly (21) comprises a first sensor (211) and a second sensor (212) which are arranged on the smoke baffle (20) at intervals;
the step S2 includes the following steps:
s21, when the hand of the user is blocked at the front side of the first sensor (211) and the distance between the hand of the user and the first sensor (211) is within a first set distance range, the first sensor (211) recognizes the first distance range, and when the residence time T of the hand of the user within the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle (20) to deflect from inside to outside, and when the first sensor (211) detects that the distance between the hand of the user and the first sensor (211) is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle (20) is kept at the position;
s22, when the hand of the user is blocked at the front side of the second sensor (212) and the distance between the hand of the user and the second sensor (212) is within a first set distance range, the second sensor (212) recognizes the distance, and when the residence time T of the hand of the user within the first set distance range reaches the set time T, the driving mechanism is started to drive the smoke baffle (20) to deflect from outside to inside, and when the second sensor (212) detects that the distance between the hand of the user and the second sensor (212) is outside the first set distance range, the driving mechanism is controlled to stop acting, so that the smoke baffle (20) is kept at the position.
13. The control method of a range hood according to claim 12, wherein: step S22 further includes the steps of:
in the process of outwards-inwards deflecting the smoke baffle (20), the current signal detection device detects a current signal of the driving motor (22), and the driving motor (22) is controlled to stop acting when being in a vertical state in the process of reversely deflecting the smoke baffle (20) through the received current signal.
14. The control method of a range hood according to claim 12, wherein: the step S3 includes the following steps:
s31, when the hand of the user is blocked at the front side of the first sensor (211) and the distance between the hand of the user and the first sensor (211) is within a second set distance range, the first sensor (211) recognizes the distance, and when the first sensor (211) detects that the residence time T1 of the hand of the user within the second set distance range reaches the set time T1, the rotating speed of the fan (11) is changed, a gear is increased, and after the upshift adjustment is completed, the audible and visual alarm device sends a signal to remind the user that the gear adjustment is completed;
s32, when the hand of the user is blocked at the front side of the second sensor (212) and the distance between the hand of the user and the second sensor (212) is within a second set distance range, the second sensor (212) recognizes the distance, and when the second sensor (212) detects that the residence time T1 of the hand of the user within the second set distance range reaches the set time T1, the rotating speed of the fan (11) is changed, one gear is lowered, and after the completion of the downshift adjustment, the audible and visual alarm device sends a signal to remind the user that the current gear adjustment is completed.
15. The control method of a range hood according to claim 14, wherein: in the above step S2, when the distance between the user 'S hand and the infrared sensor assembly (21) is in the first set distance range, the user' S hand is not in contact with the smoke barrier (20);
in the above-described step S3, when the distance between the user 'S hand and the infrared sensor assembly (21) is in the second set distance range, the user' S hand is always in contact with the smoke baffle (20).
16. The control method of a range hood according to claim 11, comprising the steps of:
the range hood is started in the following manner:
acquiring a waving induction signal through an infrared sensor assembly (21) arranged on a smoke baffle (20), judging whether the acquired waving induction signal belongs to a target waving induction signal, and if so, controlling a range hood to start, and driving a driving mechanism to act so as to drive the smoke baffle (20) to deflect from a closing state to an opening state; or (b)
The infrared sensor assembly (21) arranged on the smoke baffle plate (20) is used for acquiring temperature information of a cooking area below the machine shell (10), judging whether the acquired temperature information belongs to target temperature information, if so, controlling the starting of the range hood, controlling the driving mechanism to act, and driving the smoke baffle plate (20) to deflect from a closing state to an opening state.
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