CN109882899B

CN109882899B - Range hood controlled according to working environment

Info

Publication number: CN109882899B
Application number: CN201811630943.7A
Authority: CN
Inventors: 陈小平; 司徒伟贤; 林勇进
Original assignee: Foshan Viomi Electrical Technology Co Ltd
Current assignee: Foshan Viomi Electrical Technology Co Ltd
Priority date: 2018-12-29
Filing date: 2018-12-29
Publication date: 2020-08-14
Anticipated expiration: 2038-12-29
Also published as: CN109882899A

Abstract

A range hood controlled according to working environment is provided with a range hood main body capable of adjusting operation according to the working environment, an environment detection device for calculating the current polycyclic aromatic hydrocarbon concentration of a cooking area according to the detected temperature in the cooking area and the oil smoke size in the cooking area, a fan and an oil smoke separator for separating oil smoke particles, wherein the fan and the oil smoke separator are assembled on the range hood main body. This lampblack absorber that controls according to operational environment can calculate the current polycyclic aromatic hydrocarbon concentration of culinary art region to the oil smoke size of culinary art region, thereby simultaneously according to the oil smoke size, the temperature in the culinary art region and polycyclic aromatic hydrocarbon concentration automatically regulated fan, oil smoke separator make oil smoke and harmful gas take out rapidly from the kitchen, this lampblack absorber can link with outside cooking utensils and can effectively reduce the production of harmful gas and oil smoke, improves user's health guarantee greatly.

Description

Range hood controlled according to working environment

Technical Field

The invention relates to the field of range hoods, in particular to a range hood controlled according to a working environment.

Background

In modern life, many households produce a large amount of oil smoke during cooking. Researches show that the cooking oil fume has complex components, certain inhalation toxicity, immunotoxicity and mutagenicity and certain harm to human health. The lampblack gas comprises polycyclic aromatic hydrocarbon substances, and a considerable part of the polycyclic aromatic hydrocarbon substances have carcinogenicity, such as benzo [ alpha ] pyrene. The range hood in the prior art cannot automatically identify the concentration of polycyclic aromatic hydrocarbon substances of oil smoke in the current cooking environment, and the intelligent development of the range hood is greatly limited.

Therefore, aiming at the defects of the prior art, the range hood which is controlled according to the working environment is provided to solve the defects of the prior art and is necessary.

Disclosure of Invention

The invention aims to avoid the defects of the prior art and provides a range hood controlled according to the working environment. The cooking fume machine controlled according to the working environment can identify the temperature, the oil fume size and the concentration of polycyclic aromatic hydrocarbon in a cooking area in the front cooking environment to adjust the fan and the oil fume separator.

The above object of the present invention is achieved by the following technical measures:

the utility model provides a lampblack absorber that carries out control according to operational environment is provided with the cigarette machine main part that can adjust the operation according to operational environment, according to the culinary art in the district temperature that detects and to the cooking area oil smoke size calculation obtain the current polycyclic aromatic hydrocarbon concentration environment detection device in culinary art district, fan and be used for the oil smoke separator of oil smoke particle separation, fan and oil smoke separator assembly in the cigarette machine main part.

The environment detection device is respectively and electrically connected with the smoke machine main body, the fan and the oil-smoke separator.

The environment detection device respectively detects the temperature and the oil smoke size in the cooking area to obtain a temperature output signal, an oil smoke output signal and a polycyclic aromatic hydrocarbon concentration signal and sends the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal to the smoke machine main body, the smoke machine main body receives the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal, sends the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal to the fan and the oil smoke separator respectively, the fan receives the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal and makes corresponding adjustment, and the oil smoke separator receives the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal.

Preferably, the range of the rotation speed of the soot separator is 0 to + ∞.

Preferably, the rotation mode of the oil smoke separator is a forward rotation mode, a reverse rotation mode or a forward and reverse alternation mode.

Preferably, the operation mode of the oil fume separator is continuous operation or intermittent operation.

Preferably, the range of the rotation speed of the oil fume separator is 0-8000 rpm.

Preferably, the environment detection device is provided with a temperature sensing module for detecting the temperature in the cooking area, an image acquisition module for analyzing oil smoke images in the cooking area and obtaining the size of generated oil smoke in real time, and a calculation module for calculating the concentration of polycyclic aromatic hydrocarbon in the current cooking area, wherein the temperature sensing module and the image acquisition module are respectively electrically connected with the calculation module, and the temperature sensing module, the image acquisition module and the calculation module are respectively connected with the cigarette machine main body.

Preferably, the temperature sensing module senses the temperature in the cooking area to obtain a temperature signal, the obtained temperature signal is transmitted to the calculation module and the cigarette machine main body as a temperature output signal, the image acquisition module acquires a cooking area oil smoke image to obtain an oil smoke output signal and transmits the oil smoke output signal to the calculation module and the cigarette machine main body, the calculation module receives the temperature output signal of the temperature sensing module and the oil smoke output signal of the image acquisition module respectively, the temperature output signal and the oil smoke output signal are processed to obtain the polycyclic aromatic hydrocarbon concentration of the current cooking area in real time, then the polycyclic aromatic hydrocarbon concentration signal is obtained, and the calculation module sends the polycyclic aromatic hydrocarbon concentration signal to the cigarette machine main body.

Preferably, the calculation module is a calculation module which is constructed by mathematical modeling and obtains a mathematical relationship between the temperature and the oil smoke size and the concentration of the polycyclic aromatic hydrocarbon in the harmful gas in the oil smoke.

Preferably, the calculation module is a linear calculation module, a nonlinear calculation module, an exponential calculation module, a power calculation module, a logarithmic calculation module, a neural network calculation module, a machine learning calculation module, or a deep learning calculation module.

Preferably, the calculation formula of the calculation module is formula (I),

C_{polycyclic aromatic hydrocarbons}0.05 k +0.33 k +475.1 formula (I),

wherein C is_{Polycyclic aromatic hydrocarbons}The total concentration of the polycyclic aromatic hydrocarbon gas in the cooking area, kappa, and lambda are respectively output data of the temperature sensing module and the image acquisition module.

Preferably, the calculation formula of the calculation module is formula (ii),

C_{polycyclic aromatic hydrocarbons}＝0.05κ^0.98+0.05λ^1.05+0.33 κ λ +469.5 formula (II),

Preferably, the temperature sensing module detects the temperature in the cooking area to obtain output data k, and determines k and a temperature threshold k₁A relation of 0. ltoreq. kappa₁。

Preferably, the temperature sensing module calculates a value of a temperature change rate L, where L ═ d κ/d ω and ω are units of time, and determines a relationship between L and the temperature change rate threshold Ls.

The temperature value of the temperature standard threshold value A is k₁150 ℃ and Ls 10 ℃/min.

The temperature value of the temperature standard threshold B is k₁＝200℃。

Preferably, the image acquisition module analyzes the oil smoke image of the cooking area, obtains the size of the generated oil smoke in real time to obtain output data lambda, and judges lambda and an oil smoke threshold lambda₁And 0 is not more than λ₁。

Preferably, the image acquisition module calculates a value of the oil smoke change rate N, where N ═ d λ/d ω and ω are unit time, and determines a relationship between N and the oil smoke change rate threshold Ns.

The oil smoke value of the oil smoke standard threshold value A is lambda₁40 and Ns 1/s.

The oil smoke value of the oil smoke standard threshold value B is lambda₁＝140。

Preferably, the calculation module processes the temperature output signal and the oil smoke output signal to obtain the concentration C of the polycyclic aromatic hydrocarbon in the current cooking area in real time_{Polycyclic aromatic hydrocarbons}Judgment of C_{Polycyclic aromatic hydrocarbons}And a concentration threshold value C_{Polycyclic aromatic hydrocarbons 1}In the relationship of (1), and 0. ltoreq. C_{Polycyclic aromatic hydrocarbons 1}。

Preferably, the calculating module calculates a value of the change rate M of the concentration of the polycyclic aromatic hydrocarbon, wherein M ═ dC_{Polycyclic aromatic hydrocarbons}And the/d omega and the omega are unit time, and the relation between the M and the polycyclic aromatic hydrocarbon concentration change rate threshold value Ms is judged.

The polycyclic aromatic hydrocarbon value of the polycyclic aromatic hydrocarbon standard threshold value A is C_{Polycyclic aromatic hydrocarbons 1}＝1000pg/m³And Ms is 10 pg/(m)³*s)。

Polycyclic aromatic hydrocarbon number C of polycyclic aromatic hydrocarbon standard threshold B_{Polycyclic aromatic hydrocarbons 1}＝1500pg/m³。

Preferably, the cigarette machine main body is provided with a control module, and the control module is respectively and electrically connected with the temperature sensing module, the image acquisition module, the calculation module, the fan and the oil-smoke separator.

The control module receives and processes the temperature output signal of the temperature sensing module, the oil smoke output signal of the image acquisition module and the polycyclic aromatic hydrocarbon concentration signal of the calculation module to obtain a control signal, the control module respectively sends the control signal to the fan and the oil smoke separator, the fan receives the control signal of the control module and carries out corresponding adjustment, and the oil smoke separator receives the control signal of the control module and carries out corresponding adjustment.

Preferably, the control module adjusts the fan to a strategy of,

when the polycyclic aromatic hydrocarbon value exceeds a polycyclic aromatic hydrocarbon standard threshold value A, the control module sends a gear increasing signal to the fan to increase the gear of the fan; or

When the oil smoke value exceeds an oil smoke standard threshold value A, the control module sends a gear increase signal to the fan to increase at least one of the gears of the fan;

when the polycyclic aromatic hydrocarbon value does not exceed the polycyclic aromatic hydrocarbon standard threshold value A, the oil smoke value does not exceed the oil smoke standard threshold value A and the holding time is greater than or equal to chi, the control module sends a gear reduction signal to the fan to reduce the gear of the fan.

Preferably, the control module adjusts the fan strategy to be,

when the polycyclic aromatic hydrocarbon value exceeds a polycyclic aromatic hydrocarbon standard threshold value B, the control module sends a gear increasing signal to the fan to increase the gear of the fan; or

When the oil smoke value exceeds an oil smoke standard threshold value B, the control module sends a gear increase signal to the fan to increase at least one of the gears of the fan;

when the polycyclic aromatic hydrocarbon value does not exceed the polycyclic aromatic hydrocarbon standard threshold value B, the oil smoke value does not exceed the oil smoke standard threshold value B and the holding time is greater than or equal to chi, the control module sends a gear reduction signal to the fan to reduce the gear of the fan.

Preferably, the control module adjusts the strategy of the oil smoke separating device to be,

when the value of the polycyclic aromatic hydrocarbon exceeds a polycyclic aromatic hydrocarbon standard threshold value B, the control module sends a gear-up signal to the oil-smoke separation device to increase the gear of the oil-smoke separation device; or

When the oil smoke value exceeds an oil smoke standard threshold value B, the control module sends a gear increase signal to the oil smoke separation device to increase at least one of the gears of the oil smoke separation device;

when the polycyclic aromatic hydrocarbon value does not exceed the polycyclic aromatic hydrocarbon standard threshold value B, the oil smoke value does not exceed the oil smoke standard threshold value B and the holding time is greater than or equal to chi, the control module sends a gear reduction signal to the oil smoke separating device, so that the gear of the oil smoke separating device is reduced.

when the value of the polycyclic aromatic hydrocarbon exceeds a polycyclic aromatic hydrocarbon standard threshold value A, the control module sends a gear-up signal to the oil-smoke separation device to increase the gear of the oil-smoke separation device; or

When the oil smoke value exceeds an oil smoke standard threshold value A, the control module sends a gear increase signal to the oil smoke separation device to increase at least one of the gears of the oil smoke separation device;

when the polycyclic aromatic hydrocarbon value does not exceed the polycyclic aromatic hydrocarbon standard threshold value A, the oil smoke value does not exceed the oil smoke standard threshold value A and the holding time is greater than or equal to chi, the control module sends a gear reduction signal to the oil smoke separating device, so that the gear of the oil smoke separating device is reduced.

Preferably, the control module is further in signal connection with an external cooker, the control module sends the control signal to the external cooker for electric connection, and the external cooker receives the control signal of the control module and performs corresponding adjustment.

Preferably, the signal connection is a wired signal connection, and the wired signal connection is an RS232 signal connection, an RS485 signal connection, a USB signal connection, a GPIB signal connection or a CAN signal connection; or

The signal connection is wireless signal connection, and the wireless signal connection is WiFi signal connection, Bluetooth signal connection, NFC signal connection or ZIGBee signal connection.

Preferably, the control module adjusts the strategy of the external cooker to the external cooker,

when the temperature value exceeds the temperature standard threshold A, the control module sends a gear reduction signal to the external cooker to reduce the gear of the external cooker; or

When the temperature value exceeds the temperature standard threshold value B, the control module sends a gear reduction signal to the external stove to reduce the gear of the external stove; or

When the oil smoke value exceeds an oil smoke standard threshold value A, the control module sends a gear reduction signal to the external stove to reduce the gear of the external stove; or

When the oil smoke value exceeds an oil smoke standard threshold value B, the control module sends a gear reduction signal to the external stove to reduce the gear of the external stove; or

When the value of the polycyclic aromatic hydrocarbon exceeds a polycyclic aromatic hydrocarbon standard threshold value A, the control module sends a gear reduction signal to the external stove to reduce the gears of the external stove; or

When the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold value B, the control module sends a gear reduction signal to the external cooker so as to reduce at least one of the gears of the external cooker. Preferably, the control module adjusts the fan, the oil-smoke separating device and the external cooker according to the strategy,

when the temperature value exceeds at least one of the temperature standard threshold value A or the temperature standard threshold value B, the oil smoke value exceeds at least one of the oil smoke standard threshold value A or the oil smoke standard threshold value B, and the polycyclic aromatic hydrocarbon value exceeds at least one of the polycyclic aromatic hydrocarbon standard threshold value A or the polycyclic aromatic hydrocarbon standard threshold value B, the control module sends a gear reduction signal to the external cooker to reduce the gear of the external cooker, and the control module respectively sends gear keeping signals to the fan and the oil smoke separating device to keep the fan and the oil smoke separating device at the original gear; or

When the oil smoke numerical value exceeds the oil smoke standard threshold value A, the oil smoke numerical value exceeds the oil smoke standard threshold value B, the polycyclic aromatic hydrocarbon numerical value exceeds at least one of the polycyclic aromatic hydrocarbon standard threshold value A or the polycyclic aromatic hydrocarbon numerical value exceeds at least one of the polycyclic aromatic hydrocarbon standard threshold value B, and the temperature numerical value does not exceed the temperature standard threshold value A and the temperature standard threshold value B, the control module respectively sends gear increase signals to the fan and the oil smoke separation device, so that the gear of the fan and the oil smoke separation device is increased, the control module sends gear maintaining signals to an external cooker, and the external cooker is enabled to maintain the original gear.

The invention relates to a range hood controlled according to a working environment, which is provided with a range hood main body capable of adjusting operation according to the working environment, an environment detection device for calculating the concentration of polycyclic aromatic hydrocarbon in a cooking area according to the detected temperature in the cooking area and the size of oil smoke in the cooking area to obtain the current concentration of polycyclic aromatic hydrocarbon in the cooking area, a fan and an oil smoke separator for separating oil smoke particles, wherein the fan and the oil smoke separator are assembled on the range hood main body. This lampblack absorber that controls according to operational environment can calculate the current polycyclic aromatic hydrocarbon concentration of culinary art region to the oil smoke size of culinary art region, thereby simultaneously according to the oil smoke size, the temperature in the culinary art region and polycyclic aromatic hydrocarbon concentration automatically regulated fan, oil smoke separator make oil smoke and harmful gas take out rapidly from the kitchen, this lampblack absorber can link with outside cooking utensils and can effectively reduce the production of harmful gas and oil smoke, improves user's health guarantee greatly.

Drawings

The invention is further illustrated by means of the attached drawings, the content of which is not in any way limiting.

Fig. 1 is a schematic view of a working flow of a range hood controlled according to a working environment in embodiment 1.

Fig. 2 is a schematic view of a working flow of the range hood controlled according to the working environment in embodiment 9.

Detailed Description

The technical solution of the present invention is further illustrated by the following examples.

Example 1.

A range hood controlled according to a working environment is provided with a range hood main body capable of adjusting operation according to the working environment, an environment detection device for detecting the concentration of polycyclic aromatic hydrocarbon in a cooking area according to the detected temperature in the cooking area and the size of oil smoke in the cooking area, a fan and an oil smoke separator for separating oil smoke particles, wherein the fan and the oil smoke separator are assembled on the range hood main body. The environment detection device is respectively and electrically connected with the smoke machine main body, the fan and the oil-smoke separator.

The temperature in the cooking area of the invention is preferably the temperature of the detected kitchen ware, and can also be the temperature of air, oil smoke or kitchen range in the cooking area, and the specific implementation mode is determined according to the actual situation. In the embodiment, the temperature detected in the cooking area is the temperature of the kitchen ware.

The range of the rotation speed of the oil fume separator is 0 to +/-infinity, and the range of the rotation speed of the specific oil fume separator in the embodiment is 0 to 8000 rpm. The range of the rotation speed of the oil fume separator of the present invention can be 0 to 1000rpm, 0 to 2000rpm, 0 to 10000rpm or any specific range of rotation speed, and the specific implementation is determined according to the actual situation.

The rotation mode of the oil smoke separator of the present invention is any one of a forward rotation mode, a reverse rotation mode, and a forward/reverse alternation mode, and the specific rotation mode of the present embodiment is the forward rotation mode.

The operation mode of the oil fume separator is continuous operation or intermittent operation, and the operation mode of the embodiment is continuous operation.

The environment detection device is provided with a temperature sensing module for detecting the temperature in the cooking area, an image acquisition module for analyzing oil smoke images in the cooking area and obtaining the size of generated oil smoke in real time, and a calculation module for calculating the concentration of polycyclic aromatic hydrocarbon in the current cooking area, wherein the temperature sensing module and the image acquisition module are respectively electrically connected with the calculation module, and the temperature sensing module, the image acquisition module and the calculation module are respectively connected with the cigarette machine main body.

The temperature sensing module senses the temperature in the cooking area to obtain a temperature signal, the obtained temperature signal is transmitted to the calculation module and the cigarette machine main body as a temperature output signal, the image acquisition module acquires a cooking area oil smoke image to obtain an oil smoke output signal and transmits the oil smoke output signal to the calculation module and the cigarette machine main body, the calculation module receives the temperature output signal of the temperature sensing module and the oil smoke output signal of the image acquisition module respectively, the temperature output signal and the oil smoke output signal are processed to obtain the concentration of polycyclic aromatic hydrocarbon in the current cooking area in real time, then the concentration signal of the polycyclic aromatic hydrocarbon is obtained, and the calculation module sends the concentration signal of the polycyclic aromatic hydrocarbon to the cigarette machine main body.

The calculation module is constructed by mathematical modeling to obtain the mathematical relationship between the temperature and the oil smoke size and the concentration of the polycyclic aromatic hydrocarbon in the harmful gas in the oil smoke. The mathematical modeling is to collect the mathematical relationship between the factors of different temperatures, oil smoke sizes and the like and the concentration of the polycyclic aromatic hydrocarbon of the harmful gas in the oil smoke through experiments. Sampling detection is carried out according to different experimental conditions to obtain different types of polycyclic aromatic hydrocarbon concentrations, analysis and classification are carried out to obtain a mathematical model, and therefore the calculation module can judge the current different types of polycyclic aromatic hydrocarbon concentrations according to the detection conditions of the temperature and the oil smoke size in the cooking area.

The calculation module of the invention is one of a linear calculation module, a nonlinear calculation module, an exponential calculation module, a power calculation module, a logarithmic calculation module, a neural network calculation module, a machine learning calculation module or a deep learning calculation module.

The image acquisition module acquires the condition of oil smoke generated in the cooking process in real time, specifically acquires pictures of corresponding areas in real time, processes the current kitchen oil smoke concentration, and transmits data to the calculation module.

The processing method of the image acquisition module comprises the following steps:

the image acquisition module is used for processing on the basis of an initial image acquired by the imaging equipment, the initial image is a gray scale image, the acquired initial images are serialized and sequentially processed through the initial image of a subsequent frame and the initial image of a previous frame, and the current kitchen oil smoke concentration of each subsequent frame at the moment of the initial image is obtained.

The step process of obtaining the current kitchen oil smoke concentration at the moment of the initial image of the next frame by processing the initial image of the next frame and the initial image of the previous frame each time is as follows:

(1) performing frame difference processing on the initial image of the next frame and the initial image of the previous frame to obtain a frame difference image;

(2) denoising the frame difference image in an open operation mode to obtain a denoised image;

(3) carrying out edge detection on the denoised image, and marking a motion area as an initial region of interest;

(4) carrying out gray average value calculation and area smoothness calculation on the initial region of interest, taking the region which meets the requirements of gray average value and smoothness as the next region of interest, and taking other regions as interference elimination;

(5) and (4) respectively counting the interested areas extracted in the step (4), and obtaining oil smoke concentration assignment according to the counting result.

In the step (1), the frame difference operation on the acquired initial image to obtain a frame difference image specifically comprises:

and the image acquisition module performs subtraction on the next frame of image and the previous frame of image according to the sequence of the received initial images to obtain a frame difference image with a highlighted dynamic area.

The denoising method comprises the following steps of (2) denoising a frame difference image by using an open operation to obtain a denoised image, and specifically comprises the following steps: firstly, carrying out corrosion operation on the frame difference image to eliminate noise points and tiny spikes in the image and break narrow connection; and performing expansion operation on the corroded image to recover the smoke characteristics in the original frame difference image.

The step (3) of performing edge detection on the denoised image, and marking a motion region as an initial region of interest specifically comprises the following steps: and detecting the edge of the highlight area of the frame difference image, marking the highlight area, and taking the marked area as an initial region of interest.

Specifically, the gray mean value and the area smoothness of each initial region of interest are calculated to obtain the gray mean value and the gray smoothness corresponding to each initial region of interest, the initial regions of interest which simultaneously meet the condition that the calculated gray mean value is smaller than a gray threshold and the gray smoothness is smaller than the gray smoothness threshold are used as regions of interest, and other initial regions of interest are determined as interference regions.

Specifically, in the step (5), aiming at the interested areas extracted in the step (4), the gray levels of all pixels in each interested area image are summed to obtain the gray level of each interested area image, and then the gray level of each interested area image is summed to obtain the oil smoke concentration assignment.

The target area acquired by the imaging device is represented by an area S, and any one frame of initial image is the imaging of the corresponding area S.

The initial image is made up of m x n pixels,

the gray scale values of the pixels in the subsequent frame initial image a are represented by a matrix AH, AH ═ AH_i,j}，ah_i,jRepresenting the gray values corresponding to the pixels of the ith row and the jth column in the initial image A of the subsequent frame, wherein i is the row where the pixel is located, j is the column where the pixel is located, i is more than or equal to 1 and less than or equal to m, and j is more than or equal to 1 and less than or equal to n; the sub-area where the ith row and jth column pixels in the initial image A of the later frame are located is AS_i,j。

The gray values of the pixels of the previous frame original image B are represented by a matrix BH, { BH ═ BH_i,j}，bh_i,jRepresenting the gray values corresponding to the ith row and jth column pixels in the initial image B of the previous frame, wherein the sub-area where the ith row and jth column pixels in the initial image B of the previous frame are located is BS_i,j。

The gray values of the pixels of the frame difference image D are shown in the matrix DHIs shown, DH ═ DH_i,j}＝{|ah_i,j-bh_i,j|}，dh_i,jRepresenting the gray values corresponding to the ith row and jth column of pixels in the frame difference image D, and the sub-region where the ith row and jth column of pixels in the frame difference image D are located is DS_i,j。

In the frame difference image, | dh_i,jThe area with 0 is black; dh_i,jThe area where | ≠ 0 is highlighted.

Wherein, the step (2) of carrying out corrosion operation on the frame difference image specifically comprises the following steps:

2-11, arbitrarily defining a convolution kernel theta;

2-12, performing convolution on the convolution kernel theta and the frame difference image; when the convolution kernel theta traverses the frame difference image, extracting a pixel gray minimum value p of a convolution result in the area covered by the convolution kernel and a pixel point C coincident with the center of the convolution kernel;

the gray scale of the pixel point C passes through the matrix CH ═ C_k,qExpressing that k and q are the row sequence number and the column sequence number of the pixel C,

obtaining a minimum pixel point matrix P of a convolution result obtained in the process of traversing the frame difference image by a convolution kernel theta, wherein the gray scale of the minimum pixel point matrix P is determined by a matrix PH ═ P_k,qRepresents;

2-13 correspondingly endowing the gray level of the pixel point matrix P to a pixel point C to obtain a corrosion image;

the expansion operation is carried out on the corrosion image in the step (2), and the method specifically comprises the following steps:

2-21, arbitrarily defining a convolution kernel beta;

2-22, convolving the convolution kernel beta with the corrosion image; when the convolution kernel beta traverses the corrosion image, extracting the pixel gray maximum value o of the convolution result in the area covered by the convolution kernel and a pixel point R coincident with the center of the convolution kernel;

the gray level of the pixel point R passes through the matrix RH ═ R_l,vL and v are the row sequence number and the column sequence number of the pixel point R,

obtaining a maximum value pixel point matrix O of a convolution result obtained in the process that the convolution kernel β traverses the corrosion image, wherein the gray scale of the maximum value pixel point matrix O is determined by a matrix OH ═ O_l,vRepresents;

2-13, correspondingly endowing the gray level of the maximum pixel point matrix O to the pixel point R to obtain an expanded image, wherein the obtained expanded image is the de-noised image.

Wherein the step (3) is carried out by the following steps:

3-1, defining a filter Y, wherein the filter is a t x t matrix, and t is an odd number;

3-2, traversing the filter Y through the denoised image, calculating the gray value of the denoised image of the central pixel point of the filter at each position and the gray values of other pixel points in the neighborhood of the central pixel point, and calculating the edge detection value X of the central pixel point of the filter at each position according to the formula (I)_zZ is a flag when the filter Y traverses the denoised image,

f. g is the matrix serial number of the pixel points, f is more than or equal to 1 and less than or equal to t, g is more than or equal to 1 and less than or equal to t, and e is the gray value of the denoised image where the pixel points at each position of the filter are located; alpha is a weight coefficient corresponding to the filter position;

3-3, detecting the edge of the central pixel point X of the filter at each position_zSubtracting the gray values of other pixels in the neighborhood of the central pixel, and judging whether the absolute value of the difference is greater than a threshold value delta;

counting the number greater than the threshold value, if the number exceeds the threshold value

Judging the pixel point position of the de-noised image corresponding to the central pixel point of the filter position as an edge point, and marking;

and 3-4, traversing the whole de-noised image by using the filter to obtain all marked edge points and obtain a preliminary region of interest.

t is 3.

It should be noted that the processing method of the image acquisition module is only one of the processing methods, and for the processing methods of other image acquisition modules, only the method capable of acquiring the output data of the image acquisition module of the cooking area can be applied to the range hood controlled according to the working environment, and all the methods are within the protection scope of the present invention.

It should be noted that the image acquisition module of the present invention uses a camera to detect the oil smoke size in the cooking area, and the image acquisition module of the present invention can be used as long as the above functions of the present invention can be realized. The calculation module of the present invention calculates the concentration of the polycyclic aromatic hydrocarbon in the current cooking area according to the temperature output signal and the oil smoke output signal, and the calculation module is a calculator or a module with calculation function, which can be used as the calculation module of the present invention.

This lampblack absorber that controls according to operational environment is provided with the cigarette machine main part that can adjust the operation according to operational environment, according to the culinary art in the district temperature that detects and to the cooking oil smoke size calculation of culinary art district get the current polycyclic aromatic hydrocarbon concentration environment measuring device in culinary art district, fan and the oil smoke separator that is used for oil smoke particle separation, fan and oil smoke separator assemble in the cigarette machine main part. The temperature sensing module of the range hood detects the temperature in a cooking area, the image acquisition module analyzes oil smoke images of the cooking area and acquires the generated oil smoke conditions in real time, and then the concentration of the polycyclic aromatic hydrocarbon in the current environment is calculated through the calculation module.

Example 2.

A lampblack absorber that carries out control according to operational environment, other characteristics are the same as embodiment 1, the difference lies in: the calculation formula of the calculation module is formula (I),

C_{polycyclic aromatic hydrocarbons}0.05 k +0.33 k +475.1 formula (I),

When kappa ∈ (0 ℃, 200 ℃), lambda ∈ (0,300), C_(2-3)＝70％C_{Polycyclic aromatic hydrocarbons},C₍₄₎＝20％C_{Polycyclic aromatic hydrocarbons},C_(5-6)＝15％C_{Polycyclic aromatic hydrocarbons}。

When kappa ∈ (200 ℃, 240 ℃), lambda ∈ (300,500)_(2-3)＝60％C_{Polycyclic aromatic hydrocarbons},C₍₄₎＝25％C_{Polycyclic aromatic hydrocarbons},C_(5-6)＝15％C_{Polycyclic aromatic hydrocarbons}。

Wherein C is_(2-3)Is the concentration of bicyclic polycyclic aromatic hydrocarbons and tricyclic polycyclic aromatic hydrocarbons, C₍₄₎Is the concentration of tetracyclic polycyclic aromatic hydrocarbons, C_(5-6)Is the concentration of pentacyclic polycyclic aromatic hydrocarbon and hexacyclic polycyclic aromatic hydrocarbon.

For example, when k is 100 ℃ and λ is 100, the data values of k and λ are directly substituted into the formula to obtain C_{Polycyclic aromatic hydrocarbons}Is 3785.1 and C_{Polycyclic aromatic hydrocarbons}In units of pg/m³I.e. the concentration of polycyclic aromatic hydrocarbons in the current environment is 3785.1pg/m³。C_(2-3)Has a concentration of 2649.57pg/m³，C₍₄₎Has a concentration of 757.02pg/m³，C_(5-6)Has a concentration of 378.51pg/m³。

The range hood of this embodiment can calculate through the oil smoke size that detects temperature and culinary art district in the culinary art district and obtain the polycyclic aromatic hydrocarbon concentration of current culinary art district, can calculate the concentration of bicyclic polycyclic aromatic hydrocarbon, tricyclic polycyclic aromatic hydrocarbon, four ring polycyclic aromatic hydrocarbon, five ring polycyclic aromatic hydrocarbon and six ring polycyclic aromatic hydrocarbon in the current environment.

Example 3.

A lampblack absorber that carries out control according to operational environment, other characteristics are the same as embodiment 1, the difference lies in: the calculation formula of the calculation module is formula (II),

C_{polycyclic aromatic hydrocarbons}＝0.05κ^0.98+0.05λ^1.05+0.33 κ λ +469.5 formula (ii).

When kappa ∈ (0 ℃, 200 ℃), lambda ∈ (0,300), C_(2-3)＝70％C_{Polycyclic aromatic hydrocarbons},C₍₄₎＝20％C_{Polycyclic aromatic hydrocarbons},C_(5-6)＝10％C_{Polycyclic aromatic hydrocarbons}。

For example, when k is 100 ℃ and λ is 100, the data values of k and λ are directly substituted into the formula to obtain C_{Polycyclic aromatic hydrocarbons}Is 3780.35 and C_{Polycyclic aromatic hydrocarbons}In units of pg/m³I.e. the concentration of polycyclic aromatic hydrocarbons in the current environment is 3780.35pg/m³。C_(2-3)Has a concentration of 2646.245pg/m³，C₍₄₎Has a concentration of 756.07pg/m³，C_(5-6)Has a concentration of 378.035pg/m³。

Example 4.

A range hood controlled according to working environment, other characteristics are the same as embodiment 2 or embodiment 3, except that:

the temperature sensing module detects the temperature in the cooking area to obtain the current temperature kappa, and judges the kappa and the temperature threshold value kappa₁A relation of 0. ltoreq. kappa₁；

The temperature sensing module calculates the value of the temperature change rate L, wherein L is d kappa/d omega, and omega is unit time, and judges the relation between L and the temperature change rate threshold Ls.

For example, if the temperature value κ is 160 ℃ and L is 11 ℃/min, the temperature value exceeds the temperature standard threshold a but does not exceed the temperature standard threshold B.

When k is 210 ℃ and L is 8 ℃/min, the temperature value exceeds the temperature standard threshold B but does not exceed the temperature standard threshold a.

When k is 160 ℃ and L is 8 ℃/min, the temperature value does not exceed the temperature standard threshold a nor the temperature standard threshold B.

The image acquisition module analyzes the oil smoke image of the cooking area, obtains the size of the generated oil smoke in real time to obtain the output data lambda of the image acquisition module, and judges lambda and the oil smoke threshold lambda₁And 0 is not more than λ₁。

The image acquisition module calculates the value of the oil smoke change rate N, wherein the N is d lambda/d omega, omega is unit time, and the relation between the N and the oil smoke change rate threshold Ns is judged.

For example, when λ of the smoke number is 41 and N is 1.1/s, the smoke number exceeds the smoke standard threshold a but does not exceed the smoke standard threshold B.

For example, when λ of the oil smoke value is 141 and N is 0.1/s, the oil smoke value exceeds the oil smoke standard threshold B but does not exceed the oil smoke standard threshold a.

For example, when the lambda of the oil smoke value is 39 and the N is 1.1/s, the oil smoke value does not exceed the oil smoke standard threshold A and the oil smoke standard threshold B.

Environment detecting device outputting signal to temperatureProcessing the signal and the oil smoke output signal to obtain the concentration C of the polycyclic aromatic hydrocarbon in the current cooking area in real time_{Polycyclic aromatic hydrocarbons}Judgment of C_{Polycyclic aromatic hydrocarbons}And a concentration threshold value C_{Polycyclic aromatic hydrocarbons 1}In the relationship of (1), and 0. ltoreq. C_{Polycyclic aromatic hydrocarbons 1}。

The polycyclic aromatic hydrocarbon detection module calculates the value of the polycyclic aromatic hydrocarbon concentration change rate M, wherein M ═ dC_{Polycyclic aromatic hydrocarbons}And the/d omega and the omega are unit time, and the relation between the M and the polycyclic aromatic hydrocarbon concentration change rate threshold value Ms is judged.

E.g. C for polycyclic aromatic hydrocarbon values_{Polycyclic aromatic hydrocarbons}1111, N is 11 pg/(m)³S), the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold value a, but does not exceed the polycyclic aromatic hydrocarbon standard threshold value B.

E.g. C for polycyclic aromatic hydrocarbon values_{Polycyclic aromatic hydrocarbons}1511, N is 9 pg/(m)³S), the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold value B, but does not exceed the polycyclic aromatic hydrocarbon standard threshold value a.

E.g. C for polycyclic aromatic hydrocarbon values_{Polycyclic aromatic hydrocarbons}1111, N is 9 pg/(m)³S), the value of the polycyclic aromatic hydrocarbon does not exceed the polycyclic aromatic hydrocarbon standard threshold value A and does not exceed the polycyclic aromatic hydrocarbon standard threshold value B.

The range hood main body is provided with a control module which is respectively and electrically connected with the temperature sensing module, the image acquisition module, the calculation module, the fan and the oil-smoke separator.

Compared with the embodiment 2 or the embodiment 3, the temperature threshold, the oil smoke threshold, the concentration threshold, the temperature change rate, the oil smoke change rate and the concentration change rate are increased, and data support can be provided for the control module to adjust the fan and the oil smoke separation device.

Example 5.

A lampblack absorber that carries out control according to operational environment, other characteristics are the same as embodiment 4, the difference lies in: the control module of the invention adjusts the fan strategy as follows,

It should be noted that the increase of the gear number of the fan of the present invention can be determined by that the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold value a or the oil smoke value exceeds the oil smoke standard threshold value a, or that the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold value a and the oil smoke value exceeds the oil smoke standard threshold value a at the same time. The χ may be 60 seconds, or may be any time, and is determined according to actual conditions.

For example, when C_{Polycyclic aromatic hydrocarbons}1510pg/m³And when the lambda is 138, the control module sends a gear increasing signal to the fan to increase the gear of the fan. When the wind speed of the fan is increased, the oil smoke concentration and the polycyclic aromatic hydrocarbon concentration are gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1500pg/m³And λ ≦ 140 and holdWhen the time is more than or equal to 60 seconds, the control module sends a gear reduction signal to the fan, so that the gear of the fan is reduced, and the load of equipment operation is reduced.

The range hood of the embodiment can be used according to C_{Polycyclic aromatic hydrocarbons}And the grade number of the draught fan is adjusted by the lambda data, so that harmful gas is discharged in time, and the health of a user is guaranteed.

Example 6.

It should be noted that the increase of the gear number of the fan of the present invention can be determined by that the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold B or the oil smoke value exceeds the oil smoke standard threshold B, or that the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold B and the oil smoke value exceeds the oil smoke standard threshold B at the same time. The χ may be 60 seconds, or may be any time, and is determined according to actual conditions.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 1010pg/m³And M is 11 pg/(M)³S), when lambda is 150 and N is 0.8/s, the control module sends a gear increase signal to the fan to increase the gear of the fan. When the wind speed of the fan is increased, the oil smoke concentration and the polycyclic aromatic hydrocarbon concentration are gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1000、M≤10pg/(m³*s)pg/m³Lambda is less than or equal to 140, N is less than or equal to 1/s, and the holding time is more than or equal to 60 seconds, the control module sends out gear adjustment to the fanThe small signal reduces the gear of the fan and reduces the load of equipment operation.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 910pg/m³And M is 11 pg/(M)³S), when lambda is 150 and N is 1.2/s, the control module sends a gear increase signal to the fan to increase the gear of the fan. When the wind speed of the fan is increased, the oil smoke concentration and the polycyclic aromatic hydrocarbon concentration are gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1000、M≤10pg/(m³*s)pg/m³And when the lambda is less than or equal to 140, the N is less than or equal to 1/s and the holding time is more than or equal to 60 seconds, the control module sends a gear reduction signal to the fan, so that the gear of the fan is reduced, and the load of equipment operation is reduced.

Example 7.

A lampblack absorber that carries out control according to operational environment, other characteristics are the same as embodiment 4, the difference lies in: the control module of the invention adjusts the strategy of the oil fume separation device into,

It should be noted that the increase of the number of the oil-smoke separation device of the present invention can be determined by that the value of the polycyclic aromatic hydrocarbon exceeds the polycyclic aromatic hydrocarbon standard threshold B or the value of the oil-smoke exceeds the oil-smoke standard threshold B, or that the value of the polycyclic aromatic hydrocarbon exceeds the polycyclic aromatic hydrocarbon standard threshold B and the value of the oil-smoke exceeds the oil-smoke standard threshold B at the same time. The χ may be 60 seconds, or may be any time, and is determined according to actual conditions.

For example, when C_{Polycyclic aromatic hydrocarbons}1510pg/m³And when the lambda is 150, the control module sends a gear increase signal to the oil-smoke separating device, so that the gear of the oil-smoke separating device is increased. After the rotation speed of the oil fume separation device is increased, oil fume can be rapidly separated, so that the oil fume concentration and the polycyclic aromatic hydrocarbon concentration can be gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1500pg/m³And when the lambda is less than or equal to 140 and the holding time is more than or equal to 60 seconds, the control module sends a gear reduction signal to the fan, so that the gear of the fan is reduced, and the load of equipment operation is reduced.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 800pg/m³And when the lambda is 150, the control module sends a gear increase signal to the oil-smoke separating device, so that the gear of the oil-smoke separating device is increased. After the rotation speed of the oil fume separation device is increased, oil fume can be rapidly separated, so that the oil fume concentration and the polycyclic aromatic hydrocarbon concentration can be gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1500pg/m³And when the lambda is less than or equal to 140 and the holding time is more than or equal to 60 seconds, the control module sends a gear reduction signal to the fan, so that the gear of the fan is reduced, and the load of equipment operation is reduced.

The range hood of the embodiment can be used according to C_{Polycyclic aromatic hydrocarbons}And the grade number of the oil fume separation device is adjusted by the data of the lambda, and the oil fume can be rapidly separated, so that the oil fume concentration and the polycyclic aromatic hydrocarbon concentration can be gradually reduced, and the health of a user is guaranteed.

Example 8.

It should be noted that the increase of the number of the oil-smoke separation device can be based on that the value of the polycyclic aromatic hydrocarbon exceeds the polycyclic aromatic hydrocarbon standard threshold value A or the value of the oil-smoke exceeds the oil-smoke standard threshold value A, or that the value of the polycyclic aromatic hydrocarbon exceeds the polycyclic aromatic hydrocarbon standard threshold value A and the value of the oil-smoke exceeds the oil-smoke standard threshold value A at the same time. The χ may be 60 seconds, or may be any time, and is determined according to actual conditions.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 1010pg/m³And M is 11 pg/(M)³Lambda is 35, and when N is 2/s, the control module sends a gear increase signal to the oil smoke separating device to increase the gear of the oil smoke separating device. After the rotation speed of the oil fume separation device is increased, oil fume can be rapidly separated, so that the oil fume concentration and the polycyclic aromatic hydrocarbon concentration can be gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1000pg/m³、M≤10pg/(m³And the time is not more than 40, the time N is not more than 1/s, and the holding time is not less than 60 seconds, the control module sends a gear reduction signal to the fan, so that the gear of the fan is reduced, and the load of equipment operation is reduced.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 910pg/m³And M is 9 pg/(M)³Lambda is 43, and N is 2/s, the control module sends a gear increase signal to the oil smoke separating device to increase the gear of the oil smoke separating device. After the rotation speed of the oil fume separation device is increased, oil fume can be rapidly separated, so that the oil fume concentration and the polycyclic aromatic hydrocarbon concentration can be gradually reduced. When C is present_{Polycyclic aromatic hydrocarbons}≤1000pg/m³、M≤10pg/(m³And the time is not more than 40, the time N is not more than 1/s, and the holding time is not less than 60 seconds, the control module sends a gear reduction signal to the fan, so that the gear of the fan is reduced, and the load of equipment operation is reduced.

The range hood of the embodiment can be used according to C_{Polycyclic aromatic hydrocarbonHydrocarbons}And the grade number of the oil fume separation device is adjusted by the data of the lambda, and the oil fume can be rapidly separated, so that the oil fume concentration and the polycyclic aromatic hydrocarbon concentration can be gradually reduced, and the health of a user is guaranteed.

Example 9.

A range hood controlled according to working environment is shown in figure 2, other characteristics are the same as embodiment 4, and the difference is that: the control module is further in signal connection with an external cooker, the control module sends a control signal to the external cooker to be electrically connected, and the external cooker receives the control signal of the control module and carries out corresponding adjustment.

The signal connection of the invention can be wired signal connection or wireless signal connection. The wired signal connection is any one of RS232 signal connection, RS485 signal connection, USB signal connection, GPIB signal connection or CAN signal connection. The wireless signal connection is any one of WiFi signal connection, Bluetooth signal connection, NFC signal connection or ZIGBee signal connection. The specific signal connections are as the case may be. The signal connection of this embodiment is RS485 signal connection.

The control module adjusts the external cooking utensils according to the strategy that,

When the polycyclic aromatic hydrocarbon value exceeds the polycyclic aromatic hydrocarbon standard threshold value B, the control module sends a gear reduction signal to the external cooker so as to reduce at least one of the gears of the external cooker.

It should be noted that the reduction of the shift number of the external cooker can be based on any one of the temperature value exceeding the temperature standard threshold a, the temperature value exceeding the temperature standard threshold B, the oil smoke value exceeding the oil smoke standard threshold a, the oil smoke value exceeding the oil smoke standard threshold B, the polycyclic aromatic hydrocarbon value exceeding the polycyclic aromatic hydrocarbon standard threshold a or the polycyclic aromatic hydrocarbon value exceeding the polycyclic aromatic hydrocarbon standard threshold B, or a combination of two or more of the above.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 1501pg/m³And when the fire alarm is started, the control module sends a gear reduction signal to the external cooker, so that the firepower of the external cooker is weakened. When the firepower of the external cooker is weakened, the temperature of the kitchen ware is reduced, so that the concentration of the oil smoke and the concentration of the polycyclic aromatic hydrocarbon are gradually reduced.

For example, when C_{Polycyclic aromatic hydrocarbons}Is 1010pg/m³And M is 11 pg/(M)³S), the control module sends a gear reduction signal to the external cooker to reduce the firepower of the external cooker. When the firepower of the external cooker is weakened, the temperature of the kitchen ware is reduced, so that the concentration of the oil smoke and the concentration of the polycyclic aromatic hydrocarbon are gradually reduced.

For example, when k is 160 ℃ and L is 11 ℃/min, the control module sends a gear reduction signal to the external cooker, so that the firepower of the external cooker is reduced. When the firepower of the external cooker is weakened, the temperature of the kitchen ware is reduced, so that the concentration of the oil smoke and the concentration of the polycyclic aromatic hydrocarbon are gradually reduced.

For example, when the kappa is 220 ℃, the control module sends a gear reduction signal to the external cooker to reduce the firepower of the external cooker. When the firepower of the external cooker is weakened, the temperature of the kitchen ware is reduced, so that the concentration of the oil smoke and the concentration of the polycyclic aromatic hydrocarbon are gradually reduced.

For example, when the lambda is 41 and the N is 2/s, the control module sends a gear reduction signal to the external cooker, so that the firepower of the external cooker is weakened. When the firepower of the external cooker is weakened, the temperature of the kitchen ware is reduced, so that the concentration of the oil smoke and the concentration of the polycyclic aromatic hydrocarbon are gradually reduced.

For example, when the lambda is 150, the control module sends a gear reduction signal to the external cooker, so that the firepower of the external cooker is weakened. When the firepower of the external cooker is weakened, the temperature of the kitchen ware is reduced, so that the concentration of the oil smoke and the concentration of the polycyclic aromatic hydrocarbon are gradually reduced.

The lampblack absorber of this embodiment can be according to the firepower of oil smoke numerical value, polycyclic aromatic hydrocarbon numerical value and temperature numerical value regulation outside cooking utensils, in time reduces oil smoke concentration and polycyclic aromatic hydrocarbon concentration, ensures user's health.

Example 10.

A lampblack absorber that carries out control according to operational environment, other characteristics are the same as embodiment 9, the difference lies in: the control module adjusts the fan, the oil-smoke separating device and the external cooker according to the strategy that,

when the temperature value exceeds at least one of the temperature standard threshold value A or the temperature standard threshold value B, the oil smoke value exceeds at least one of the oil smoke standard threshold value A or the oil smoke standard threshold value B, and the polycyclic aromatic hydrocarbon value exceeds at least one of the polycyclic aromatic hydrocarbon standard threshold value A or the polycyclic aromatic hydrocarbon standard threshold value B, the control module sends a gear reduction signal to the external cooker to reduce the gear of the external cooker, the control module respectively sends gear keeping signals to the fan and the oil smoke separating device to keep the fan and the oil smoke separating device at original gears.

Or when the oil smoke numerical value exceeds the oil smoke standard threshold value A, the oil smoke numerical value exceeds the oil smoke standard threshold value B, the polycyclic aromatic hydrocarbon numerical value exceeds the polycyclic aromatic hydrocarbon standard threshold value A or the polycyclic aromatic hydrocarbon numerical value exceeds at least one of the polycyclic aromatic hydrocarbon standard threshold value B, and the temperature numerical value does not exceed the temperature standard threshold value A and the temperature standard threshold value B, the control module respectively sends gear increase signals to the fan and the oil smoke separating device, so that the gear of the fan and the oil smoke separating device is increased, and the control module sends gear maintaining signals to an external cooker so that the external cooker maintains the original gear.

For example, when κ is 210 ℃, λ is 150, C_{Polycyclic aromatic hydrocarbons}1510pg/m³When the control module sends a gear reduction signal to the external stove, the external stove is enabled to be powered onThe gear is reduced, and the control module respectively sends gear keeping signals to the fan and the oil-smoke separating device, so that the fan and the oil-smoke separating device keep original gears.

For example, when κ is 160 ℃ and L is 11 ℃/min, λ is 160, C_{Polycyclic aromatic hydrocarbons}Is 1010pg/m³And M is 12 pg/(M)³S), the control module sends a gear reduction signal to the external cooker to reduce the gear of the external cooker, and the control module sends gear keeping signals to the fan and the oil-smoke separating device respectively to keep the original gear of the fan and the oil-smoke separating device.

For example, when κ is 160 ℃ and L is 11 ℃/min, λ is 50 and N is 3/s, C_{Polycyclic aromatic hydrocarbons}Is 1600pg/m³During the time, control module sends gear to outside cooking utensils and transfers the small signal, makes outside cooking utensils gear reduce, and control module sends gear to fan and oil smoke separator respectively and keeps the signal, makes fan and oil smoke separator keep original gear.

For example, when λ is 150, C_{Polycyclic aromatic hydrocarbons}1510pg/m³And when kappa is 190 ℃ and L is 9 ℃/min, the control module respectively sends gear increasing signals to the fan and the oil-smoke separating device to increase the gears of the fan and the oil-smoke separating device, and the control module sends gear maintaining signals to an external cooker to maintain the original gears of the external cooker.

For example, when λ is 50, N is 3/s, C_{Polycyclic aromatic hydrocarbons}Is 910pg/m³And when kappa is 160 ℃ and L is 9 ℃/min, the control module respectively sends gear increasing signals to the fan and the oil-smoke separating device to increase the gears of the fan and the oil-smoke separating device, and the control module sends gear maintaining signals to an external cooker to maintain the original gears of the external cooker.

The range hood of the embodiment can be based on kappa, lambda and C_{Polycyclic aromatic hydrocarbons}The data regulation fan, the oil smoke separator and the external cooker effectively reduce the oil smoke concentration and the polycyclic aromatic hydrocarbon concentration and ensure the health of users.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. The utility model provides a lampblack absorber that carries out control according to operational environment which characterized in that: the environment detection device is electrically connected with the smoke machine main body, the fan and the smoke separator respectively;

the environment detection device respectively detects the temperature and the oil smoke size in the cooking area to obtain a temperature output signal, an oil smoke output signal and a polycyclic aromatic hydrocarbon concentration signal, and sends the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal to the smoke machine main body, the smoke machine main body respectively sends the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal to the fan and the oil smoke separator, the fan receives the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal and makes corresponding adjustment, and the oil smoke separator receives the temperature output signal, the oil smoke output signal and the polycyclic aromatic hydrocarbon concentration signal and makes corresponding adjustment;

the calculation module of the environment detection device calculates the current concentration of the polycyclic aromatic hydrocarbon in the cooking area, and the calculation module is a calculation module which is constructed by mathematical modeling and obtains the mathematical relationship between the temperature and the oil smoke size and the concentration of the polycyclic aromatic hydrocarbon in the harmful gas in the oil smoke.

2. A range hood according to claim 1, characterized in that: the calculation module is a linear calculation module or a nonlinear calculation module;

when the calculation module is a nonlinear calculation module, the calculation module is an exponential calculation module, a power calculation module, a logarithmic calculation module, a neural network calculation module, a machine learning calculation module or a deep learning calculation module.

3. A range hood according to claim 2, characterized in that: the range of the rotating speed of the oil fume separator is 0 to +/-infinity;

the rotation mode of the oil fume separator is a forward rotation mode, a reverse rotation mode or a forward and reverse alternating mode;

the operation mode of the oil fume separator is continuous operation or intermittent operation.

4. A range hood according to claim 3, characterized in that: the range of the rotating speed of the oil fume separator is 0-8000 rpm.

5. A range hood according to claim 4 for control in accordance with the work environment, wherein: the environment detection device is provided with a temperature sensing module for detecting the temperature in the cooking area, an image acquisition module for analyzing oil smoke images in the cooking area and obtaining the size of generated oil smoke in real time, and a calculation module for calculating the concentration of polycyclic aromatic hydrocarbon in the current cooking area, wherein the temperature sensing module and the image acquisition module are respectively and electrically connected with the calculation module, and the temperature sensing module, the image acquisition module and the calculation module are respectively and electrically connected with the cigarette machine main body;

the temperature sensing module senses the temperature in the cooking area to obtain a temperature signal, the obtained temperature signal is transmitted to the calculation module and the cigarette machine main body as a temperature output signal, the image acquisition module acquires a cooking area oil smoke image to obtain an oil smoke output signal and transmits the oil smoke output signal to the calculation module and the cigarette machine main body, the calculation module receives the temperature output signal of the temperature sensing module and the oil smoke output signal of the image acquisition module respectively, then the temperature output signal and the oil smoke output signal are processed to obtain the concentration of polycyclic aromatic hydrocarbon in the current cooking area in real time, then the concentration signal of the polycyclic aromatic hydrocarbon is obtained, and the calculation module sends the concentration signal of the polycyclic aromatic hydrocarbon to the cigarette machine main body.

6. A range hood according to claim 5 for control of a working environment, wherein: the calculation formula of the calculation module is formula (I),

C_{polycyclic aromatic hydrocarbons}0.05 k +0.33 k +475.1 formula (I),

7. A range hood according to claim 5 for control of a working environment, wherein: the calculation formula of the calculation module is formula (II),

8. The range hood controlled according to a working environment of claim 6, wherein: the temperature sensing module detects the temperature in the cooking area to obtain output data kappa, and judges kappa and a temperature threshold value kappa₁A relation of 0. ltoreq. kappa₁；

The temperature sensing module calculates a value of a temperature change rate L, wherein the value of L is d kappa/d omega, and omega is unit time, and judges the relation between L and a temperature change rate threshold Ls;

the temperature value of the temperature standard threshold value A is k₁150 ℃ and Ls 10 ℃/min;

9. A range hood according to claim 8, wherein: the image acquisition module analyzes the oil smoke image of the cooking area, obtains the size of the generated oil smoke in real time to obtain output data lambda, and judges lambda and an oil smoke threshold lambda₁In relation to (1), and 0 is less than or equal toλ₁；

The image acquisition module calculates the value of the oil smoke change rate N, wherein the N is d lambda/d omega, omega is unit time, and the relation between the N and the oil smoke change rate threshold Ns is judged;

the oil smoke value of the oil smoke standard threshold value A is lambda₁40 and Ns 1/s;

10. A range hood according to claim 9 for control in accordance with a work environment, wherein: the calculation module processes the temperature output signal and the oil smoke output signal to obtain the concentration C of the polycyclic aromatic hydrocarbon in the current cooking area in real time_{Polycyclic aromatic hydrocarbons}Judgment of C_{Polycyclic aromatic hydrocarbons}And a concentration threshold value C_{Polycyclic aromatic hydrocarbons 1}In the relationship of (1), and 0. ltoreq. C_{Polycyclic aromatic hydrocarbons 1}；

The calculation module calculates a value for the rate of change of polycyclic aromatic hydrocarbon concentration M, where M ═ dC_{Polycyclic aromatic hydrocarbons}Taking/d omega and omega as unit time, and judging the relation between M and the polycyclic aromatic hydrocarbon concentration change rate threshold value Ms;

the polycyclic aromatic hydrocarbon value of the polycyclic aromatic hydrocarbon standard threshold value A is C_{Polycyclic aromatic hydrocarbons 1}＝1000pg/m³And Ms is 10 pg/(m)³*s)；

11. A range hood according to claim 10, wherein: the range hood main body is provided with a control module which is respectively and electrically connected with the temperature sensing module, the image acquisition module, the calculation module, the fan and the oil-smoke separator;

12. A range hood according to claim 11, wherein: the control module adjusts the fan to the strategy of,

13. A range hood according to claim 11, wherein: the control module adjusts the fan to the strategy of,

14. A range hood according to claim 11, wherein: the control module adjusts the strategy of the oil fume separation device into,

15. A range hood according to claim 11, wherein: the control module adjusts the strategy of the oil fume separation device into,

16. A range hood according to claim 11, wherein: the control module is further in signal connection with an external cooker, the control module sends a control signal to the external cooker to be electrically connected, and the external cooker receives the control signal of the control module and carries out corresponding adjustment.

17. A range hood controlled according to a working environment, as claimed in claim 16, wherein: the signal connection is a wired signal connection, and the wired signal connection is an RS232 signal connection, an RS485 signal connection, a USB signal connection, a GPIB signal connection or a CAN signal connection; or

18. A range hood according to claim 17, wherein: the control module adjusts the external cooking utensils according to the strategy that,

19. A range hood according to claim 17, wherein: the control module adjusts the fan, the oil-smoke separating device and the external cooker according to the strategy,