CN108870495B - Oil smoke concentration detection apparatus - Google Patents
Oil smoke concentration detection apparatus Download PDFInfo
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- CN108870495B CN108870495B CN201810945761.2A CN201810945761A CN108870495B CN 108870495 B CN108870495 B CN 108870495B CN 201810945761 A CN201810945761 A CN 201810945761A CN 108870495 B CN108870495 B CN 108870495B
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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)
- Air Conditioning Control Device (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention discloses a kind of oil smoke concentration detection apparatus, the smoke detector including master control borad and connection master control borad；Master control borad is used to the electric signal that smoke detector generates being converted to digital quantity, and using the average value of the multiple digital quantities obtained recently as standard value；Master control borad obtains the variance of multiple digital quantities according to standard value, and the ratio based on variance and smokeless reference value determines whether there is oil smoke；Master control borad is also used to determine oil smoke concentration size according to latest digital amount in multiple digital quantities, and according to oil smoke concentration size, control the revolving speed of range hood fan to when having oil smoke in judgement.The present invention can prevent that oil smoke from easily spreading in air or the disturbing factors such as other external environments lead to the influence detected to oil smoke, and strong antijamming capability can be improved detection accuracy, help that lampblack fan air quantity is adjusted, and intelligence degree is high.
Description
Technical field
The present invention relates to family's electro-technical field, in particular to a kind of oil smoke concentration detection apparatus.
Background technique
Kitchen ventilator is the necessity in most of kitchen, but most of kitchen ventilator is all manual switch, and air quantity is solid
It is fixed, it according to the size of oil smoke needs that blower gear is adjusted manually, will cause in culinary art inconvenient for use.And in cooking process
In the problem of being always maintained at maximum wind power, also bringing along energy consumption and noise.At the end of culinary art, general kitchen ventilator can also work one
The section time, the preceding paragraphs time such as user's need can shut down to exclude remaining oil smoke, and therefore, the part oil smoke in traditional technology is quick-witted
It is not high degree to be changed.Though being interfered vulnerable to outside environmental elements, detection in addition, automatic adjustment air quantity can be detected by oil smoke by having
Precision is not high, not can be effectively controlled fan delivery, and the fan delivery of automatic adjustment is caused not to be able to satisfy user demand.
Summary of the invention
The present invention provides a kind of oil smoke concentration detection apparatus, for solving the above problem present in kitchen ventilator.
Embodiment according to the present invention provides a kind of oil smoke concentration detection apparatus, including master control borad and connection master
Control the smoke detector of plate；
Master control borad is used to the electric signal that smoke detector generates being converted to digital quantity, and the multiple numbers that will be obtained recently
The average value of amount is as standard value；Master control borad obtains the variance of multiple digital quantities according to standard value, and based on variance and smokeless ginseng
The ratio for examining value determines whether there is oil smoke；
Master control borad is also used to determine oil smoke concentration according to latest digital amount in multiple digital quantities to when having oil smoke in judgement
Size, and according to oil smoke concentration size, control the revolving speed of range hood fan.
Smoke detector is carbon dioxide sensor, TVOC sensor and laser transmitting-receiving in one of the embodiments,
Any one of device.
Smoke detector is the laser transceiver in one of the embodiments,；Laser transceiver includes connection master control
The laser and photoelectric sensor of plate.
Photoelectric sensor is silicon photocell in one of the embodiments,；Laser fixed time interval switch；Electric signal is silicon
The optical signal that photocell transition detection arrives voltage value generated；
The optical signal detected when silicon photocell closes laser is converted to the first voltage value and is transmitted to master control borad；Silicon
The optical signal detected when photocell opens laser is converted to second voltage value and is transmitted to master control borad；
Difference of the master control borad based on the first voltage value and second voltage value, obtains digital quantity.
Photoelectric sensor is photo resistance in one of the embodiments,；Laser fixed time interval switch；Electric signal is light
The obtained current value of optical signal that quick resistance transition detection arrives；
The optical signal detected when laser is closed in photo resistance is converted to the first current value and is transmitted to master control borad；Light
The optical signal that quick resistance detects when opening laser is converted to the second current value and is transmitted to master control borad；
Difference of the master control borad based on the first current value and the second current value, obtains digital quantity.
Photoelectric sensor is photodiode in one of the embodiments,；Laser fixed time interval switch；Electric signal is
The optical signal that photodiode transition detection arrives photocurrent values generated；
The optical signal detected when laser is closed by photodiode is converted to the first photocurrent values and is transmitted to master control
Plate；The optical signal detected when photodiode opens laser is converted to the second photocurrent values and is transmitted to master control borad；
Difference of the master control borad based on the first photocurrent values and the second photocurrent values, obtains digital quantity.
Master control borad includes the analog-digital converter for connecting smoke detector in one of the embodiments,；
The electric signal that smoke detector generates is converted to digital quantity by analog-digital converter.
Master control borad is also used to detect that oil smoke concentration changes after range hood fan starts in one of the embodiments,
When, the revolving speed for keeping range hood fan current is constant, until oil smoke concentration changes range hood fan when reaching corresponding threshold value
Revolving speed.
Multiple digital quantities when master control borad is also used to be not detected oil smoke in one of the embodiments, it is flat
Mean value is updated to the smokeless reference value.
In one of the embodiments, laser and photoelectric sensor be respectively arranged on kitchen ventilator air inlet side and with oil
The opposite other side in the side of smoke machine air inlet.
A technical solution in above-mentioned technical proposal is had the following advantages and beneficial effects:
Oil smoke concentration detection apparatus of the invention, including master control borad, and the smoke detector of connection master control borad, master control can
The electric signal of smoke detector is switched into digital quantity, and using the average value of the multiple digital quantities obtained recently as standard value.It is main
Plate is controlled by obtaining the variance of multiple digital quantity, and then oil smoke detection is carried out based on the ratio of the variance and smokeless reference value.
Master control borad turns in multiple digital quantity according to newest obtained discrete control range hood fan when having detected oil smoke
Speed.The present invention can prevent oil smoke easily spread in air or the disturbing factors such as other external environments cause to oil smoke detect shadow
It rings, strong antijamming capability can be improved detection accuracy, help that lampblack fan air quantity is adjusted, and intelligence degree is high.
Detailed description of the invention
Fig. 1 is the schematic block diagram for the oil smoke concentration detection apparatus that embodiment of the present invention provides；
Fig. 2 is the schematic knot that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects carbon dioxide sensor
Structure block diagram；
Fig. 3 is the schematic structure frame that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects TVOC sensor
Figure；
Fig. 4 is the schematic structure frame that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects laser transceiver
Figure；
Fig. 5 is the schematic structure frame that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects photoelectric sensor
Figure；
Fig. 6 is the schematic structure frame that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects silicon photocell
Figure；
Fig. 7 is the schematic structure frame that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects photo resistance
Figure；
Fig. 8 is the schematic structure frame that the oil smoke concentration detection apparatus that embodiment of the present invention provides connects photodiode
Figure；
Fig. 9 is the another schematic block diagram for the oil smoke concentration detection apparatus that embodiment of the present invention provides；
Figure 10 is the control flow schematic diagram for the oil smoke concentration detection apparatus that embodiment of the present invention provides；
Figure 11 is another control flow schematic diagram for the oil smoke concentration detection apparatus that embodiment of the present invention provides.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, referring to the drawings in conjunction with the embodiments, right
The present invention is further described.
Hereinafter, various embodiments of the present invention will be described more fully.The present invention can have various embodiments, and
It can adjust and change wherein.It should be understood, however, that: there is no the scope of the present invention is limited to specific reality disclosed herein
The intention of example is applied, but should be all in the spirit and scope for falling into various embodiments of the present invention invention is construed as covering
Adjustment, equivalent and/or optinal plan.
Hereinafter, disclosed in the term " includes " that can be used in various embodiments of the present invention or " may include " instruction
Function, operation or the presence of element, and do not limit the increase of one or more functions, operation or element.In addition, such as existing
Used in various embodiments of the present invention, term " includes ", " having " and its cognate are meant only to indicate special characteristic, number
Word, step, operation, the combination of element, component or aforementioned item, and be understood not to exclude first one or more other
Feature, number, step, operation, element, component or aforementioned item combined presence or increase one or more features, number,
Step, operation, element, component or aforementioned item combination a possibility that.
In various embodiments of the present invention, statement " at least one of A or/and B " includes the text listed file names with
Any combination or all combinations.For example, statement " A or B " or " at least one of A or/and B " may include A, may include B or can
Including A and B both.
The statement (" first ", " second " etc.) used in various embodiments of the present invention can be modified in various implementations
Various constituent element in example, but respective sets can not be limited into element.For example, the above statement is not intended to limit the sequence of element
And/or importance.The above statement is only used for the purpose for differentiating an element and other elements.For example, first user device
Different user device is indicated with second user device, although the two is all user apparatus.For example, of the invention various not departing from
In the case where the range of embodiment, first element is referred to alternatively as second element, and similarly, second element is also referred to as first yuan
Part.
It should also be noted that if a constituent element ' attach ' to another constituent element by description, it can be by the first composition member
Part is directly connected to the second constituent element, and " connection " third can form between the first constituent element and the second constituent element
Element.On the contrary, when a constituent element " being directly connected to " is arrived another constituent element, it will be appreciated that in the first constituent element
And second third constituent element is not present between constituent element.
The term used in various embodiments of the present invention is used only for the purpose of describing specific embodiments and not anticipates
In limitation various embodiments of the present invention.Unless otherwise defined, otherwise all terms used herein (including technical term and
Scientific term) there is contain identical with the normally understood meaning of various embodiments of the present invention one skilled in the art
Justice.Term (term such as limited in the dictionary generally used) is to be interpreted as having and language in the related technical field
The identical meaning of border meaning and it will be interpreted as having Utopian meaning or meaning too formal, unless in the present invention
Various embodiments in be clearly defined.
Referring to Fig. 1, in the present embodiment, oil smoke concentration detection apparatus of the invention, including master control borad 110, and connection
The smoke detector 120 of master control borad；
Master control borad 110 is used to the electric signal that smoke detector 120 generates being converted to digital quantity, and more by what is obtained recently
The average value of a digital quantity is as standard value；Master control borad 110 obtains the variance of multiple digital quantities according to standard value, and is based on variance
Whether there is oil smoke with the ratio in judgement of smokeless reference value；
Master control borad 110 is also used to determine oil smoke according to latest digital amount in multiple digital quantities to when having oil smoke in judgement
Concentration, and according to oil smoke concentration size, control the revolving speed of range hood fan.
Edible oil encounters the gas and aerosol of high-temperature gasification, decomposition when oil smoke, can reduce the transparency of air, smog inspection
Surveying device can realize that oil smoke detects by detecting the concentration of smog.Specifically, master control borad driving smoke detector is periodically detected
Oil smoke, the electric signal generated when smoke detector will test be converted to digital quantity and be transmitted to master control borad, and master control borad will receive
Electric signal is converted to digital quantity, and obtains multiple number as standard value according to the average value of the multiple digital quantities obtained recently
The variance of word amount.Further, master control borad then determines when the ratio of the variance and smokeless reference value is greater than or equal to preset value
There is oil smoke, otherwise determines no oil smoke.Wherein, the multiple digital quantities obtained recently are, last in collection period of master control borad
The digital quantity that multiple time points before a time point and the last one time point are converted to.Smokeless reference value can be master control
The pre-stored numerical value of plate, or smoke detector is back to the electric signal of master control borad in no oil smoke, and through master control borad
The numerical value that digital quantization is handled.
Newest obtained digital quantity is the digital quantity being converted to the last one time point of master control borad in collection period,
Master control borad determines the size of oil smoke concentration according to the digital quantity when having detected oil smoke.Specifically, it can first pass through and test in advance
Depositing for master control borad is stored in the corresponding relationship of digital quantity (i.e. oil smoke concentration) and lampblack absorber wind fan delivery, and by the corresponding relationship
Storage portion, master control borad can determine oil smoke concentration size according to digital quantity as a result, and control range hood fan according to oil smoke concentration size
Revolving speed, to reach corresponding air quantity grade.
Oil smoke concentration detection apparatus of the invention, including master control borad, and the smoke detector of connection master control borad, master control can
The electric signal of smoke detector is switched into digital quantity, and using the average value of the multiple digital quantities obtained recently as standard value.It is main
Plate is controlled by obtaining the variance of multiple digital quantity, and then oil smoke detection is carried out based on the ratio of the variance and smokeless reference value.
Master control borad when having detected oil smoke, turned in each digital quantity according to newest obtained discrete control range hood fan
Speed.The present invention can prevent oil smoke easily spread in air or the disturbing factors such as other external environments cause to oil smoke detect shadow
It rings, strong antijamming capability can be improved detection accuracy, help that lampblack fan air quantity is adjusted, and intelligence degree is high.
Referring to Fig. 1, in a specific embodiment, master control borad 110 includes the analog-to-digital conversion of connection smoke detector 120
Device 130；
The electric signal that smoke detector 120 generates is converted to digital quantity by analog-digital converter 130.
Analog-digital converter, that is, A/D converter is the electronic device for converting analog signals into digital signal.That is analog-to-digital conversion
Smoke detector can be received the electric current or voltage converted when electric signal by device, and an output is further converted into after acquisition
Digital signal ADC value, and digital signal ADC value is transmitted to master control borad.
Oil smoke concentration detection apparatus of the invention, master control borad receive the telecommunications that smoke detector is sent by analog-digital converter
Number, further, output digital quantity is handled through digital quantization.The present invention can further improve the essence to oil smoke detection as a result,
Degree and efficiency, and can guarantee that master control borad accurately controls the revolving speed of range hood fan, wind is driven according to the size of oil smoke concentration
Machine reaches corresponding air quantity, and intelligence degree is high.
Referring to fig. 2, Fig. 3 and Fig. 4, in a specific embodiment, in oil smoke concentration detection apparatus provided by the invention,
Smoke detector is any one of carbon dioxide sensor 220, TVOC sensor 320 and laser transceiver 420.
Oil smoke contains the substances such as carbon monoxide, carbon dioxide and oxide, as a result, in the present embodiment, such as Fig. 2 institute
Show, oil smoke can be detected by carbon dioxide sensor 220.Specifically, carbon dioxide sensor 220 can be by the electricity of generation
Signal is transmitted to master control borad 210 through the mode of serial communication.
The electric signal that the carbon dioxide content that master control borad detects carbon dioxide sensor generates, is handled through digital quantization
After obtain digital quantity.Wherein, electric signal can be voltage or current.Master control borad is averaged the multiple digital quantities obtained recently
Value is used as standard value, obtains the variance of multiple digital quantity according to the standard value, as a result, can be based on the variance and smokeless reference value
Ratio, carry out oil smoke detection.The size and carbon dioxide content of oil smoke concentration are proportional relationship, and therefore, oil smoke concentration is got over
Greatly, the carbon dioxide content that carbon dioxide sensor detects is higher, and then the voltage or current generated is bigger, and master control borad turns
The digital quantity got in return is bigger.In turn, master control borad can determine that oil smoke is dense according to newest obtained digital quantity when detecting oil smoke
Size is spent, and according to oil smoke concentration size, controls the revolving speed of range hood fan.
Contain TVOC (total volatile organism) pollutant in oil smoke, such as aldehyde, ketone, hydrocarbon, fatty acid, alcohol, aromatic compound
The indoor air pollutants such as object, ester, lactone, heterocyclic compound.In the present embodiment, as shown in figure 3, TVOC sensor can be passed through
320 pairs of oil smoke detect.Specifically, master control borad 310 drives TVOC sensor 320 periodically to contain to the TVOC gas in air
Amount is detected.
The electric signal of TVOC sensor transmissions is converted to digital quantity by master control borad, and by the multiple digital quantities obtained recently
Average value obtains the variance of multiple digital quantity as standard value, in turn, can the ratio based on the variance and smokeless reference value into
The detection of row oil smoke.TVOC gas content and oil smoke concentration size direct proportionality.It, can basis when master control borad has detected oil smoke
Newest obtained digital quantity determines oil smoke concentration size to control the revolving speed of range hood fan, wherein electric signal can be electricity
Pressure or electric current.
Further, as shown in figure 3, master control borad 310 includes being connected with each other master controller 312 and submaster controller 314, into one
Step ground, master control borad 310 further includes the analog-digital converter 316 being connected between master controller 312 and TVOC sensor 320.
Analog-digital converter is used to the electric signal that TVOC sensor generates carrying out digital quantization processing to be converted to digital quantity, and
It is transmitted to value master controller.Master controller is used for using the average value of the multiple digital quantities got recently in collection period as mark
Quasi- value, so that conversion obtains the variance of multiple digital quantity, master controller is carried out based on the ratio of the variance and smokeless reference value
Oil smoke detection, when having detected oil smoke, determines oil smoke concentration size according to newest obtained digital quantity in collection period, from
And the corresponding air quantity grade of the oil smoke concentration is found according to mapping table, corresponding blower driving, which is transmitted, to submaster controller refers to
It enables.Submaster controller receives corresponding blower driving instruction, the revolving speed of range hood fan is controlled, so that range hood fan reaches corresponding
Air quantity grade.
As shown in figure 4, laser transceiver 420 is a kind of device for receiving and dispatching laser signal, the light quality of sending is pure, spectrum
Stablize, for detecting oil smoke suitable for kitchen ventilator, the anti-interference ability to external environmental factor can be improved.Specifically, laser
Transceiver 420 includes the laser 424 and laser detector 428 for being separately connected master control borad 410.Master control borad 410 drives laser
424 periodically emit laser signal to laser detector 428, and laser detector 428 is by the laser signal transmission received to master
Control plate 410.
The laser signal received is converted to digital quantity, and being averaged according to the multiple digital quantities obtained recently by master control borad
Value is used as standard value, obtains the variance of multiple digital quantity.It should be noted that master control borad carries out oil smoke detection according to the variance
Working principle and master control borad smog can be found in above-described embodiment to the control of range hood fan when detecting oil smoke and examine
The realization process that device is carbon dioxide sensor or TVOC sensor is surveyed, details are not described herein.
Oil smoke concentration detection apparatus of the invention can pass through carbon dioxide sensor, TVOC sensor or laser transmitting-receiving
Device detects oil smoke, and realizes control of the master control borad to range hood fan, and compatibility is strong, and structure is simple, improves detection
The sensitivity and precision of oil smoke.The present invention can it is accurate detection oil smoke concentration size, the good cooking environments of user are provided.
Referring to Fig. 5, in a specific embodiment, smoke detector is laser transceiver 520；Laser transceiver 520
Laser 524 and photoelectric sensor 528 including connecting master control borad 510.
Photoelectric sensor 528 is to be turned signal by photoelectric cell using sensor of the photoelectric cell as detecting element
It is changed to electric signal, wherein electric signal is voltage or current, and master control borad 510 drives 524 periodical launch laser of laser letter
Number, and be irradiated on photoelectric sensor 528.The size and optical signal for the voltage or current that photoelectric sensor 528 is converted to
Power be proportional relationship, light signal strength is bigger, then the voltage or current being converted to is bigger, otherwise smaller.
Specifically, in order to exclude the interference of environment light, master control borad drives laser fixed time interval switch, and photoelectric sensor exists
When laser is closed, the ambient light signal that will test is converted to the first electric signal and is transmitted to master control borad, opens in laser
When, the ambient light signal and laser signal that will test are converted to the second electric signal and are transmitted to master control borad.The every transmitting of laser
Laser signal, master control borad obtains one group of data, when this group of data are that laser emits a laser signal, photoelectric sensor
The ambient light signal that detects when laser is closed and the first electric signal generated, photoelectric sensor are examined when laser is opened
The ambient light signal and laser signal that measure and the second electric signal generated.Master control borad will will acquire in collection period
Each group of data is converted to digital quantity.Specifically, the first electric signal in every group of data is converted to the first digital quantity by master control borad, will
Second electric signal is converted to the second digital quantity, obtains the difference of the first digital quantity and the second digital quantity.In air due to oil smoke
It is easier to spread, the first electric signal and the second electric signal can have certain fluctuation, and therefore, master control borad obtains in collection period
Multi-group data is taken, and obtains the difference of multi-group data, further, the average value of each difference is conversed, obtains each difference
Variance.Master control borad has then detected oil when the ratio of the variance and smokeless reference value is greater than or equal to pre-stored threshold value
Cigarette, otherwise smokelessly.
Further, in master control borad when having detected oil smoke, in the multi-group data that is obtained in collection period, according to most
Newest one group of data that the latter time point obtains are converted to the size of the difference of digital quantity, and control range hood fan revolving speed has reached
To corresponding air quantity.
Oil smoke concentration detection apparatus of the invention, smoke detector are cooperated by photoelectric sensor and laser to oil
Cigarette is detected, and then master control borad can judge whether there is oil smoke according to the digital quantity that the electric signal of conversion photoelectric sensor obtains and deposit
, and control the revolving speed of range hood fan.The present invention can exclude the interference of environment light, and structure is simple, improve anti-interference ability
And the sensitivity of detection.The start and stop that range hood fan can be effectively controlled simultaneously, adjust the air quantity of range hood fan, meet user
Use demand, good cooking environments are provided.
Referring to Fig. 6, in a specific embodiment, photoelectric sensor is silicon photocell 628；Interval when laser 624
Switch；Electric signal is the optical signal voltage value generated that 628 transition detection of silicon photocell arrives；
The optical signal that silicon photocell 628 detects when closing laser 624 is converted to the first voltage value and is transmitted to master
Control plate 610；The optical signal that silicon photocell 628 detects when opening laser is converted to second voltage value and is transmitted to master control borad
610；
Difference of the master control borad 610 based on the first voltage value and second voltage value, obtains digital quantity.
Specifically, silicon photocell is a kind of semiconductor devices for directly luminous energy being converted to electric energy, structure is simple, cost
Low, compatibility is strong and is widely used.In the present embodiment, laser thoroughly emits laser signal to silicon photocell, silicon photocell
The laser signal received and ambient light signal are converted into electric signal, it is preferred that the electric signal is voltage.Silicon photocell conversion
The power of obtained voltage swing and illumination is proportional relationship, and light is stronger, then the voltage that silicon photocell is converted to is bigger,
It is on the contrary then reduce.Specifically, in order to exclude the interference of environment light, master control borad controls laser fixed time interval switch transmitting laser letter
Number, when laser is closed, the ambient light signal that will test is converted to the first voltage value and is transmitted to master control borad silicon photocell,
When laser is opened, the ambient light signal and laser signal that will test are converted to second voltage value and are transmitted to master control borad.
A laser laser signal of every transmitting, master control borad obtain one group of data, this group of data are that laser emits a laser signal
When, the silicon photocell ambient light signal that detects and the first voltage value for generating when laser is closed, silicon photocell is in laser
The ambient light signal that detects and laser signal when device is opened and the second voltage value generated.Master control borad will in collection period,
The each group of data that will acquire is converted to digital quantity.Specifically, the first voltage value in every group of data is converted to by master control borad
Second voltage value is converted to second voltage ADC value, obtains first voltage ADC value and second voltage ADC value by one voltage ADC value
Voltage ADC difference.Since oil smoke is easier to spread in air, the first voltage value and second voltage value can have certain wave
Dynamic, therefore, master control borad obtains multi-group data in collection period, and obtains the voltage ADC difference of multi-group data, further,
The average value for conversing each voltage ADC difference obtains the variance of each voltage ADC difference.Master control borad is in the variance and smokeless ginseng
When examining the ratio of value more than or equal to pre-stored threshold value, then oil smoke has been detected, otherwise smokelessly.
Further, it in master control borad when having detected oil smoke, in multi-group data, is obtained according to the last one time point
To newest one group of data be converted to digital quantity voltage ADC difference size, control the operating status of range hood fan, adjust
Range hood fan revolving speed is to reach corresponding air quantity.It stops operating conversely, then controlling range hood fan.
Oil smoke concentration detection apparatus of the invention, silicon photocell last a long time, durable, can receive laser transmitting
Laser signal, and by the laser signal received and ambient light signal using high conversion as electric signal, stability is strong, helps to mention
It is good to provide user so that master control borad can accurately control rotation speed of fan for high measurement accuracy, the accurate size for detecting oil smoke concentration
Cooking environments.
Further, as shown in fig. 6, master control borad 610 includes master controller 612 interconnected and submaster controller 614, master
Controlling plate 610 further includes analog-digital converter 618, and analog-digital converter 618 is separately connected silicon photocell 628 and master controller 612, secondary
614 connecting laser 624 of controller.
Analog-digital converter is used for the optical signal that receives silicon photocell and is converted to voltage, be further transformed into one it is defeated
Digital quantity out, that is, voltage ADC value, and voltage ADC value is transmitted to master control borad.
Further, the first voltage value of the multi-group data of silicon photocell and second voltage value are passed through number by analog-digital converter
First voltage ADC value and second voltage ADC value are exported after word quantification treatment respectively to master controller, master controller is according to multiple groups number
According to voltage ADC difference, obtain the variance of multiple ADC differences, and oil smoke is judged whether there is according to the variance and is existed, it is oily if it exists
Cigarette, the size of the voltage ADC difference of the one group of data got according to the last one time point, searching referring to mapping table should
The corresponding air quantity grade of voltage ADC difference generates corresponding blower driving instruction with this and is transmitted to submaster controller.Wherein, secondary
Controller can be connect with master controller by serial communication, and submaster controller drives laser periodical launch laser signal, pair control
Device processed receives the blower driving instruction that master controller is sent by serial communication, and controls oil according to corresponding blower driving instruction
The revolving speed of smoke machine blower, to reach corresponding air quantity grade.
Oil smoke concentration detection apparatus of the invention, by the mutual cooperation of analog-digital converter, master controller and submaster controller,
The process and efficiency of data processing are optimized, so that automatically controlling blower with the variation of oil smoke concentration size when cooking
Revolving speed is fast and effeciently adjusted to corresponding air quantity and removes oil smoke, and precision is high.
Referring to Fig. 7, in a specific embodiment, photoelectric sensor is photo resistance 728；Laser 724 is fixed time
Separate pass；Electric signal is the obtained current value of optical signal that 728 transition detection of photo resistance arrives；
The optical signal that photo resistance 728 detects when closing laser 724 is converted to the first current value and is transmitted to master
Control plate 710；The optical signal that photo resistance 728 detects when opening laser 724 is converted to the second current value and is transmitted to master
Control plate 710；
Difference of the master control borad 710 based on the first current value and the second current value, obtains digital quantity.
Photo resistance is that a kind of resistance value made of the photoconductive effect using semiconductor changes with the power of incident light
Resistor.In the present embodiment, voltage is added to the both ends of photo resistance, laser signal is transmitted to photosensitive electricity by laser
Resistance, the laser signal and ambient light signal that photo resistance receives are converted to current value.Further, photo resistance is by certain
When the light irradiation of degree, resistance value will reduce with the enhancing of optical signal, flow through the electric current of the photo resistance at this time therewith
Increase, conversely, the resistance value of the then photo resistance increases, the electric current for flowing through the photo resistance at this time reduces therewith.It needs to illustrate
, master control borad controls photo resistance and laser cooperates and detects oil smoke concentration size, to control range hood fan
Revolving speed can be found in above-described embodiment with the working principle for reaching corresponding air quantity grade, and controller controls silicon photocell and laser
The mutually matched realization process of device, details are not described herein.
Oil smoke concentration detection apparatus of the invention, photo resistance good reliability, small in size and high sensitivity, reaction speed
Fastly, spectral characteristic is good.As a result, the present invention can by the laser signal received and ambient light signal using high conversion as electric signal,
Stability is strong, helps to improve detection accuracy, while effectively and rapidly adjusting fan delivery, improves the intelligent journey of kitchen ventilator
Degree, provides the good cooking environments of user.
Referring to Fig. 8, in a specific embodiment, photoelectric sensor is photodiode 828；Photoelectric sensor is light
Electric diode 828；824 fixed time interval of laser switch；Electric signal by 828 transition detection of photodiode to optical signal give birth to
At photocurrent values；
The optical signal that photodiode 828 detects when being closed laser 824 is converted to the first photocurrent values and transmits
To master control borad 810；The optical signal that photodiode 828 detects when opening laser 824 is converted to the second photocurrent values simultaneously
It is transmitted to master control borad 810；
Difference of the master control borad 810 based on the first photocurrent values and the second photocurrent values, obtains digital quantity.
Photodiode is the semiconductor devices that optical signal is become to electric signal, and response speed is very fast.Specifically, photoelectricity two
Pole pipe receives the laser signal of laser transmitting through oil smoke, and laser signal and ambient light signal are converted to electric signal,
Middle electric signal is the photoelectric current of photodiode.The photoelectric current size of photodiode is direct proportion with the light intensity received
Relationship, light is stronger, then the photoelectric current of photodiode is bigger, otherwise smaller.It should be noted that master control borad controls photoelectricity two
Pole pipe and laser, which cooperate, detects oil smoke concentration size, to control the revolving speed of range hood fan to reach corresponding air quantity
The working principle of grade can be found in above-described embodiment, controller control silicon photocell with laser is mutually matched realized
Journey, details are not described herein.
Detection oil smoke effect can be improved using photodiode as photoelectric sensor in oil smoke concentration detection apparatus of the invention
Laser signal and ambient light signal Efficient Conversion can be electric signal, improve detection accuracy, and facilitate controller and quickly ring by rate
Blower should be controlled to adjust in turn and reaches corresponding air quantity, remove oil smoke.The utility model structure is simple, improves response speed, can
Reduce the energy consumption of kitchen ventilator.
In a specific embodiment, master control borad is also used to detect that oil smoke concentration changes after range hood fan starts
When, the revolving speed for keeping range hood fan current is constant, until oil smoke concentration changes range hood fan when reaching corresponding threshold value
Revolving speed.
When master control borad detects oil smoke concentration variation after range hood fan starting, the current revolving speed of holding range hood fan
It is constant, until master control borad generates corresponding blower driving instruction when kitchen ventilator concentration reaches corresponding threshold value, change master control borad
Range hood fan revolving speed, and it is adjusted to corresponding air quantity grade.
Oil smoke concentration detection apparatus of the invention, when due to opening range hood fan, smoke has reduction trend, or in oil
When smoke machine blower turns air quantity down, oil smoke may have the tendency that increasing, to avoid range hood fan from switching repeatedly or shift hunting.
Mitigationization processing is executed to range hood fan as a result, the smoke variation tendency to oil smoke is steady, and certain journey is decreased or increased
When spending, then the adjusting of air quantity grade is carried out to range hood fan.The energy consumption that the present invention can prevent range hood fan shift hunting from losing,
The service life that kitchen ventilator can be extended simultaneously can make kitchen ventilator reliablely and stablely a work, improve the efficiency for removing oil smoke.
In a specific embodiment, multiple digital quantities when master control borad is also used to be not detected oil smoke
Average value is updated to the smokeless reference value.
Oil smoke concentration detection apparatus of the invention, can kitchen ventilator when just powering on, or when oil smoke has been not detected, master control borad
The digital quantity after digital quantization that multiple groups smoke detector is sent is obtained, and the average value of multi-group data is updated to smokelessly
Reference value, wherein can with but be not limited to obtain it is preceding 20 groups oil smoke is not detected when smoke detector transmission data.
Oil smoke concentration detection apparatus of the invention can be corrected smokeless reference value, improve the precision of oil smoke detection,
It can effectively realize and range hood fan is accurately controlled, prevent wrong report situation when oil smoke machine testing oil smoke, and to blower
Error starting and air quantity mistuning section, energy saving extends the service life of kitchen ventilator.
In a specific embodiment, laser and photoelectric sensor be respectively arranged on kitchen ventilator air inlet side and with
The opposite other side in the side of kitchen ventilator air inlet.
Oil smoke concentration detection apparatus of the invention, the oil smoke that the negative pressure that kitchen ventilator generates generates when can be to culinary art pass through oil smoke
Machine air inlet is extracted.Laser and photoelectric sensor are respectively arranged on the opposite two sides of air inlet by the utility model as a result,
It can pass through the mutual cooperation of oil smoke region to receive and dispatch laser signal, structure is simple, and laser and photoelectric sensor can be prevented saturating
The problem of crossing other non-essential space mediums and leading to erroneous detection, further excludes the interference of environment light, and then can accurately detect
The concentration of oil smoke out, and fast response time.
Referring to Fig. 9, in conjunction with Figure 10, as a preferred embodiment, in practical applications by silicon photocell and laser
For smoke detector, oil smoke concentration detection apparatus of the invention is further illustrated.
In the present embodiment, as shown in figure 9, laser 924 is opposite with the air inlet that silicon photocell 928 is mounted on kitchen ventilator
Two sides.The control module 914 of kitchen ventilator is that submaster controller drives laser periodical launch laser signal, and laser signal penetrates
Oil smoke right above pot, is irradiated on silicon photocell 928.Oil smoke is bigger, and laser signal is irradiated to the light intensity on silicon photocell 928
It is smaller, on the contrary it is bigger.As shown in Figure 10, the specific steps are as follows:
Step S110: control module 914 drives laser 924 periodically to emit laser signal to silicon photocell 928, enters
Step S120.
Controller MCU is master controller, and when silicon photocell receives a degree of light, both ends can be generated accordingly
Voltage.Specifically, it is assumed that the environment that environment light will detect in 1s without acute variation, silicon photocell when laser is closed
The first voltage value a that optical signal generates is transmitted to analog-digital converter 918, the ambient light signal that will be detected when laser is opened
The second voltage value b generated with laser signal is transmitted to analog-digital converter 918.
Step S120: analog-digital converter 918 carries out quantized digital signal processing, enters step S130.
Analog-digital converter 918 acquires the first voltage value a and voltage value b of silicon photocell transmission, and is converted to voltage ADC
Voltage ADC value a and voltage ADC value b are transmitted to controller MCU912 by value a and voltage ADC value b.
Step S130: controller MCU912 obtains nearest multi-group data in collection period, and carries out oil smoke detection, if
There is oil smoke then to enter step S140, otherwise enters step S150.
Controller MCU912 obtains voltage ADC value a and voltage ADC value progress difference operation in nearest each group of data
Voltage ADC difference, and the variance of multi-group data is obtained according to each voltage ADC difference, according to the ratio of variance and smokeless reference value
Judge whether there is oil smoke.If ratio is greater than or equal to preset value, oil smoke is detected, oil smoke has otherwise been not detected.Wherein,
Nearest multi-group data can with but be not limited in collection period five groups of nearest data.
Step S140: controller MCU912 obtains multi-group data nearest in collection period, and is handled, and enters step
S160。
Controller MCU912 is obtained in multi-group data nearest in collection period, is obtained most according to the last one time point
New one group of data are converted to the size of voltage ADC difference, determine kitchen ventilator air quantity grade, and corresponding blower driving instruction is passed
Transport to control module 914.
Step S150: do not start or close range hood fan.
Step S160: control module 914 receives corresponding blower driving instruction, controls the revolving speed of range hood fan, so that
Range hood fan reaches corresponding air quantity, return step S110.
Oil smoke concentration detection apparatus of the invention, it is easy to use, during the cooking process, range hood fan can be quickly opened,
And air quantity is automatically adjusted with the size of oil smoke concentration, intelligence degree is high, energy saving, and detection accuracy is high, can effectively remove
Oil smoke.
As a preferred embodiment, in range hood fan operational process, to prevent blower shift hunting from causing to run
Unstable problem, as shown in figure 11, further comprising the steps of:
Step S210: controller MCU912 after range hood fan starting, according to one got newest in collection period
The voltage ADC difference of group data, judges whether oil smoke concentration changes, is to enter step if otherwise entering step S220
S230。
Step S220: the revolving speed that control module 914 keeps range hood fan current is constant, return step S210.
Step S230: controller MCU912 judges whether oil smoke concentration rises or falls to correspondence according to voltage ADC difference
Threshold value, if then entering step S240, otherwise return step S220.
Step S240: controller MCU912 sends corresponding blower driving instruction to control module 914, enters step
S250。
Controller MCU912 rises to corresponding threshold value in oil smoke concentration, then drives the blower for rising to corresponding air quantity grade
Instruction is sent to control module 914, enters step S250；Corresponding threshold value is dropped in oil smoke concentration, then will settle to corresponding wind
The blower driving instruction of amount grade is sent to control module 914, enters step S250.
Step S250: control module 914 controls range hood fan revolving speed, return step according to corresponding blower driving instruction
S210。
Oil smoke concentration detection apparatus of the invention, can in the sudden increase (such as opening the pot stewed) of smoke, can quickly by
Range hood fan is adjusted to maximum quantity of wind, guarantees Quick air-discharge, and range hood fan is made to be maintained at current rotating speed operating, to cigarette
When amount is slowly reduced to a certain extent, rotation speed of fan is gradually reduced, effectively removing oil smoke.The present invention can avoid range hood fan
Switch or shift hunting repeatedly execute mitigationization processing to range hood fan as a result, and the smoke variation tendency to oil smoke is steady,
And when being decreased or increased to a certain extent, then the adjusting of air quantity grade is carried out to range hood fan.The present invention can prevent lampblack absorber wind
The energy consumption of machine shift hunting loss, while the service life of kitchen ventilator can be extended, kitchen ventilator reliablely and stablely a work can be made, improved
Remove the efficiency of oil smoke.
It will be appreciated by those skilled in the art that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
It will be appreciated by those skilled in the art that the module in device in implement scene can be described according to implement scene into
Row is distributed in the device of implement scene, can also be carried out corresponding change and is located at the one or more dresses for being different from this implement scene
In setting.The module of above-mentioned implement scene can be merged into a module, can also be further split into multiple submodule.
Aforementioned present invention serial number is for illustration only, does not represent the superiority and inferiority of implement scene.Disclosed above is only the present invention
Several specific implementation scenes, still, the present invention is not limited to this, and the changes that any person skilled in the art can think of is all
Protection scope of the present invention should be fallen into.
Claims (10)
1. a kind of oil smoke concentration detection apparatus, which is characterized in that the Smoke Detection including master control borad and the connection master control borad
Device；
The master control borad is used to the electric signal that the smoke detector generates being converted to digital quantity, and multiple by what is obtained recently
The average value of digital quantity is as standard value；The master control borad obtains the variance of the multiple digital quantity according to the standard value, and
Ratio based on the variance and smokeless reference value determines whether there is oil smoke；
The master control borad is also used to when being determined with oil smoke, determines oil smoke according to newest digital quantity in the multiple digital quantity
Concentration, and according to the oil smoke concentration size, control the revolving speed of range hood fan；
Wherein, the smokeless reference value is the pre-stored numerical value of the master control borad, or examines the smog for the master control borad
Survey the numerical value that the signal that device is sent in no oil smoke obtains after digital quantization is handled；The newest digital quantity is the master control
The digital quantity that the last one time point of plate in collection period is converted to.
2. oil smoke concentration detection apparatus according to claim 1, which is characterized in that the smoke detector is carbon dioxide
Any one of sensor, TVOC sensor and laser transceiver.
3. oil smoke concentration detection apparatus according to claim 2, which is characterized in that the smoke detector is the laser
Transceiver；The laser transceiver includes the laser and photoelectric sensor for connecting the master control borad.
4. oil smoke concentration detection apparatus according to claim 3, which is characterized in that the photoelectric sensor is silicon photoelectricity
Pond；The laser fixed time interval switch；The electric signal is that the optical signal that the silicon photocell transition detection arrives is generated
Voltage value；
The optical signal that the silicon photocell detects when closing the laser is converted to the first voltage value and is transmitted to described
Master control borad；The optical signal that the silicon photocell detects when opening the laser is converted to second voltage value and is transmitted to institute
State master control borad；
Difference of the master control borad based on the first voltage value Yu the second voltage value, obtains the digital quantity.
5. oil smoke concentration detection apparatus according to claim 3, which is characterized in that the photoelectric sensor is photosensitive electricity
Resistance；The laser fixed time interval switch；The electric signal is that the optical signal that the photo resistance transition detection arrives is obtained
Current value；
The optical signal that the photo resistance detects when closing the laser is converted to the first current value and is transmitted to described
Master control borad；The optical signal that the photo resistance detects when opening the laser is converted to the second current value and is transmitted to institute
State master control borad；
Difference of the master control borad based on first current value Yu second current value, obtains the digital quantity.
6. oil smoke concentration detection apparatus according to claim 3, which is characterized in that the photoelectric sensor is two pole of photoelectricity
Pipe；The laser fixed time interval switch；The electric signal by the photodiode transition detection to optical signal generate
Photocurrent values；
The optical signal that the photodiode detects when being closed the laser is converted to the first photocurrent values and is transmitted to
The master control borad；The optical signal that the photodiode detects when opening the laser is converted to the second photocurrent values simultaneously
It is transmitted to the master control borad；
Difference of the master control borad based on first photocurrent values Yu second photocurrent values, obtains the digital quantity.
7. oil smoke concentration detection apparatus according to claim 1, which is characterized in that the master control borad includes connecting the cigarette
The analog-digital converter of fog detector；
The electric signal that the analog-digital converter generates the smoke detector is converted to the digital quantity.
8. according to claim 1 to oil smoke concentration detection apparatus described in 7 any one, which is characterized in that the master control borad is also
When for detecting oil smoke concentration variation after range hood fan starting, the revolving speed for keeping the range hood fan current is not
Become, until oil smoke concentration changes the revolving speed of the range hood fan when reaching corresponding threshold value.
9. oil smoke concentration detection apparatus according to claim 8, which is characterized in that the master control borad is also used to not detect
To there is the average value of multiple digital quantities when oil smoke to be updated to the smokeless reference value.
10. oil smoke concentration detection apparatus according to claim 3, which is characterized in that the laser and the photoelectric transfer
Sensor is respectively arranged on the side and the other side opposite with the side of the kitchen ventilator air inlet of kitchen ventilator air inlet.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109654569A (en) * | 2019-01-25 | 2019-04-19 | 广东美集世智能科技有限公司 | A kind of construction module using laser identification technology tobacco control |
| CN110500743B (en) * | 2019-08-23 | 2021-11-23 | 宁波奥克斯电气股份有限公司 | Control method of kitchen air conditioner, air conditioner and computer readable storage medium |
| CN112555929A (en) * | 2019-09-25 | 2021-03-26 | 佛山市顺德区美的洗涤电器制造有限公司 | Kitchen appliance, control method thereof and computer readable storage medium |
| CN110608984A (en) * | 2019-09-25 | 2019-12-24 | 佛山市顺德区美的洗涤电器制造有限公司 | Oil smoke detection component and kitchen appliance |
| CN110617525A (en) * | 2019-09-25 | 2019-12-27 | 佛山市顺德区美的洗涤电器制造有限公司 | Kitchen appliance, control method thereof, and computer-readable storage medium |
| CN110617527A (en) * | 2019-09-25 | 2019-12-27 | 佛山市顺德区美的洗涤电器制造有限公司 | Control method, kitchen appliance and storage medium |
| CN110726162A (en) * | 2019-10-16 | 2020-01-24 | 珠海格力电器股份有限公司 | Control method and control device for adjusting air quantity of range hood |
| CN111044473A (en) * | 2019-12-11 | 2020-04-21 | 华帝股份有限公司 | Oil smoke concentration detection method of oil smoke detection device and range hood |
| CN113154480B (en) * | 2020-01-06 | 2022-08-12 | 宁波方太厨具有限公司 | Fume exhaust fan |
| CN111765499B (en) * | 2020-06-08 | 2023-05-02 | 杭州九阳小家电有限公司 | Rotating speed control method of smoke machine and smoke machine |
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