CN212618552U

CN212618552U - Fume exhaust fan

Info

Publication number: CN212618552U
Application number: CN202021440838.XU
Authority: CN
Inventors: 赵亮; 王波; 秦英哲; 李美恒
Original assignee: Qingdao Hisense Electronic Industry Holdings Co Ltd; Hisense Guangdong Kitchen and Bath System Co Ltd
Current assignee: Qingdao Hisense Electronic Industry Holdings Co Ltd; Hisense Guangdong Kitchen and Bath System Co Ltd
Priority date: 2020-07-20
Filing date: 2020-07-20
Publication date: 2021-02-26
Anticipated expiration: 2030-07-20

Abstract

The utility model relates to a range hood technical field discloses a range hood, including organism, oil net subassembly, drive assembly, a plurality of oil smoke sensor and controller, be provided with slide rail set spare on the organism, the oil net subassembly passes through slide rail set spare slidable mounting is in on the organism, drive assembly with the oil net subassembly is connected and is driven the oil net subassembly is followed slide rail set spare reciprocates, the oil smoke sensor is installed respectively the oil net subassembly with on the organism, the oil smoke sensor is used for the detection of the work area's that the organism covered the oil smoke concentration value, the controller is installed inside the organism, the controller respectively with drive assembly, each the oil smoke sensor electricity is connected. The utility model discloses can be according to the range hood of oil smoke motion state and real-time adjustment oil net position to reach the purpose of the best absorption oil smoke.

Description

Fume exhaust fan

Technical Field

The utility model relates to a range hood technical field especially relates to a range hood.

Background

Under an ideal state, aiming at a certain near-suction range hood air duct system, an oil screen has an optimal air inlet position range so as to achieve the best oil smoke suction effect, and at the moment, negative pressure formed by the air duct acts on the outside air to cause the minimum loss and further shows the maximum suction force on oil smoke. Meanwhile, the air duct of the range hood is centered, and the condition that left and right eye cookers which are respectively located at two sides are used or oil smoke is generated when the cookers are used simultaneously needs to be considered, so that the near-suction range hood is used for balancing a plurality of factors, and an oil net is generally fixed at the optimal position of a design and test effect. However, in actual conditions, the use environments of different users and a single user in different use periods are different, including factors such as atmospheric pressure, flue pressure and external wind interference, air inlet at the position of the oil screen fixed by the range hood inevitably causes loss of suction force, so that the phenomenon of smoke leakage or smoke non-absorption is caused, the oil screen cannot achieve the optimal treatment effect, and the humanization and the intellectualization in practical application are insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: the range hood capable of adjusting the position of the oil screen in real time according to the motion state of the oil smoke is provided, so that the purpose of optimally absorbing the oil smoke is achieved.

In order to achieve the above object, the utility model provides a range hood, include:

the device comprises a machine body, a sliding rail assembly and a control device, wherein the machine body is provided with the sliding rail assembly;

the oil screen assembly is slidably mounted on the machine body through the sliding rail assembly;

the driving assembly is connected with the oil screen assembly and drives the oil screen assembly to move up and down along the sliding rail assembly;

the oil smoke sensors are respectively arranged on the oil screen assembly and the machine body and are used for detecting oil smoke concentration values of a working area covered by the machine body;

the controller is installed inside the machine body and is electrically connected with the driving assembly and the oil smoke sensors respectively.

Further, the oil smoke sensor is sleeved with a protection box, and a filter screen is installed on the opening side of the detection port of the oil smoke sensor.

Furthermore, the number of the oil smoke sensors is three, the oil smoke sensors are respectively a first oil smoke sensor, a second oil smoke sensor and a third oil smoke sensor, the first oil smoke sensor is installed in the middle of the oil net component, and the second oil smoke sensor and the third oil smoke sensor are respectively arranged on two sides of the machine body.

Furthermore, first oil smoke sensor detects the mouth and sets up down, second oil smoke sensor and third oil smoke sensor detect the mouth all towards the organism outside sets up.

Furthermore, the oil screen assembly comprises an oil screen, and an upper baffle and a lower baffle are respectively arranged on the upper side and the lower side of the oil screen.

Furthermore, be equipped with row mouth in the middle of the oil net, row mouth both sides are equipped with scalable area baffle.

Further, an oil cup is arranged at the bottom of the machine body.

Further, a protective cover is installed on the driving assembly.

Compared with the prior art, the utility model provides a pair of range hood, its beneficial effect lies in: the oil smoke sensor arranged at different positions on the range hood is used for real-time oil smoke detection, the current movement track of the oil smoke is analyzed according to the detection result, and the position of the oil net is timely adjusted according to the movement track of the oil smoke, so that the optimal oil smoke absorption effect is achieved, and the intelligence and humanization of the range hood are improved.

Drawings

FIG. 1 is a front view of the whole structure of the range hood of the present invention;

FIG. 2 is a side view of the whole structure of the range hood of the present invention;

fig. 3 is a schematic structural diagram of the driving assembly of the present invention;

fig. 4 is a schematic structural diagram of a first soot sensor of the present invention;

fig. 5 is a schematic structural view of the slide rail assembly of the present invention.

In the figure, 1, a machine body; 2. an oil screen assembly; 201. an oil screen; 202. an upper baffle plate; 203. a lower baffle plate; 3. a drive assembly; 301. a drive motor; 302. a transmission rod; 303. a transmission rod fixing plate; 304. a hole bolt; 4. a slide rail assembly; 401. a slide rail; 402. a slider; 5. a first soot sensor; 6. a second soot sensor; 7. a third soot sensor; 8. side columns; 9. a protective cover; 10. an oil cup; 11. a smoke collection cavity; 12. a protective case; 13. and (5) filtering by using a filter screen.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

Example 1: a range hood.

As shown in fig. 1-5, the utility model provides a range hood of preferred embodiment, it includes organism 1, oil net subassembly 2, drive assembly 3, a plurality of oil smoke sensor, be provided with slide rail set spare 4 on the organism 1, oil net subassembly 2 passes through slide rail set spare 4 slidable mounting is in on the organism 1, drive assembly 3 with oil net subassembly 2 is connected, and drive assembly 3 drive oil net subassembly 2 reciprocates along slide rail set spare 4, the oil smoke sensor is installed respectively oil net subassembly 2 with on the organism 1, the oil smoke sensor is used for the detection of the oil smoke concentration value of the work area that organism 1 covered. This embodiment is applied to two furnace heads cooking utensils, for better detection oil smoke, the oil smoke sensor specifically is equipped with threely, is first oil smoke sensor 5, second oil smoke sensor 6 and third oil smoke sensor 7 respectively, first oil smoke sensor 5 is installed 2 middle part positions of oil net subassembly and are in 2 air intakes downside of oil net subassembly, second oil smoke sensor 6 with third oil smoke sensor 7 is located respectively 1 both sides of organism specifically are that second oil smoke sensor 6 sets up in 1 left side of organism, and third oil smoke sensor 7 sets up in 1 right side of organism.

Based on the above scheme, in this embodiment, the usage of the dual-burner cooker is first detected, and the smoke sensor at the corresponding position is matched for detection according to different usage, for example, only the left burner is used, and the first smoke sensor 5 and the second smoke sensor 6 are used for detection; only the right burner is used, and the first oil smoke sensor 5 and the third oil smoke sensor 7 are used for detecting; two burners are used simultaneously, and a first oil smoke sensor 5, a second oil smoke sensor 6 and a third oil smoke sensor 7 are adopted for simultaneous detection. Specifically, for example, when the range hood detects that the left burner is operated and the right burner is not operated, the range hood collects the concentration of oil smoke through the first oil smoke sensor 5 and the second oil smoke sensor 6, and when the first oil smoke sensor 6 detects that the concentration of the oil smoke is greater than a certain range and the retention time exceeds a set value, the oil smoke is judged to move rightwards, and at the moment, the driving assembly 3 drives the oil mesh assembly 2 to move upwards so that the position of the oil mesh assembly 2 is more matched with the direction of the oil smoke; similarly, when the second oil smoke sensor 6 detects that the oil smoke concentration value is greater than a certain range and the retention time exceeds a set value, it is determined that the oil smoke moves leftwards, and at this time, the driving assembly 3 drives the oil mesh assembly 2 to move downwards. Correspondingly, the working principle that only the right side furnace end is used or the two furnace ends are used simultaneously is the same, the oil smoke concentration value is effectively detected, the oil smoke movement direction is judged, and the position of the oil screen assembly 2 is adjusted, so that the oil screen assembly 2 is always located at the best oil smoke absorption position. In addition, for the oil smoke detection effect after the displacement of the oil net component 2 is accurate, the first oil smoke sensor 5 is installed on the oil net component 2 and moves along with the oil net component 2, namely, the first oil smoke sensor 5 does not have relative displacement with the oil net component 2, the relative detection positions of the first oil smoke sensor 5 and the oil net component 2 keep the whole range consistent, and the detection effect is guaranteed.

Preferably, the system in the range hood comprises a signal acquisition module, a data processing module, a model matching module, an action response module, a temporary storage processing module and a power supply module for supplying power, wherein the signal acquisition module is a range hood sensor in the embodiment, preferably, a laser particle sensor is used for counting particles with different diameters according to a laser scattering principle, the minimum resolution particle size is 0.3 μm, meanwhile, an active mode is adopted for communication with the master control data of the range hood, and the refreshing time is less than 200 ms. When the range hood is in the intelligent adjusting mode, the signal acquisition module starts signal acquisition and transmits signals to the signal and data processing module. The signal acquisition module is divided into a cooker state signal acquisition stage and an oil smoke motion state monitoring stage. Firstly, the oil smoke sensors at three positions jointly collect oil smoke signals, and the using state of the cooker is preliminarily judged, so that the corresponding oil smoke sensors in the group are selected for carrying out next-stage real-time monitoring. When only the left stove is used, the first oil smoke sensor 5 and the second oil smoke sensor 6 are selected to simultaneously detect, two groups of data are comprehensively distinguished, the change of all movement states of oil smoke generated by the left stove head under the current state is covered, and meanwhile, the two groups of data are compared and corrected, so that the measurement and control reliability is improved, and the response speed is accelerated. Similarly, only the right stove is used, and the first lampblack sensor 5 and the third lampblack sensor 7 are selected. When the multiple burner is used simultaneously, the three position oil smoke sensors detect simultaneously, and the multiple groups of data reflect the oil smoke motion state together.

The acquisition signal is transmitted to the data processing module, and for oil smoke particulate matter concentration signals, the data processing module mainly converts particulate matter concentration analog signals into digital signals and transmits the digital signals to the master control of the range hood for model matching according to a communication protocol. The model matching module adapts the cooking model established in the test stage through the judgment result of the using condition of the cooker, so that the cooking model is kept in the adaptation mode for adjustment in the whole cooking process. Under the matched mode, the operation of the range hood is set in various parameters of the corresponding model, such as detection threshold values of various oil smoke sensors, detection holding time setting, displacement proportion coefficient adjustment and the like. And then, under the real-time monitoring state, setting specific control displacement according to specific detection values every time, and continuously feeding back and adjusting to achieve the optimal position. The data processing module mainly completes real-time monitoring of signals acquired in real time, and processing results output at the stage are input into the control action response module and serve as the most important reference basis for immediately adjusting the working state of the range hood. Meanwhile, in each working period, monitoring data are temporarily stored in the temporary storage processing module, and relevant reference key values and the predicted change trend of the matched model are compared, so that the model is corrected.

The action response module is mainly used for self-adaptive adjustment of the position of the oil screen assembly of the range hood after detection is finished, is an explicit execution part in the whole system and finishes sensible intelligent control change of a user. Meanwhile, when cooking is finished, whether the machine is in a shutdown state is judged according to the setting background of the front part model and the output of the monitoring processing result, and accordingly, delayed shutdown is continuously waited to be finished.

Preferably, in order to better protect the smoke sensors in the using process, each smoke sensor is sleeved with a protection box 12, and a filter screen 13 is installed on the opening side of the detection port. The oil screen assembly 2 comprises an oil screen 201, an upper baffle 202 is arranged in the upward direction of the oil screen, a lower baffle 203 is arranged in the downward direction of the oil screen, and the first oil smoke sensor 5 is arranged on the lower side of an air inlet of the oil screen 201, namely, the first oil smoke sensor 5 can utilize the shielding effect of the lower baffle 203 to reduce the direct impact of oil smoke on the first oil smoke sensor 5. In order to prevent oil stain deposition and influence the detection precision and the service life of the oil smoke sensor, the detection port of the first oil smoke sensor 5 is arranged downwards, and the bottom of the machine body 1 is provided with an oil cup 10 for collecting oil, so that the oil can be naturally recovered into the oil cup 10 under the action of gravity even if the oil stain still deposits.

Preferably, the two sides of the machine body 1 are provided with side columns 8, the second lampblack sensor 6 and the third lampblack sensor 7 are arranged in the side columns 8 on the left side and the right side respectively, and the side columns 8 on the two sides are isolated from the smoke collection cavity 11 in the machine body 1, so that the interference of lampblack in the smoke collection cavity 11 on detection can be effectively prevented. In addition, second oil smoke sensor 6 and third oil smoke sensor 7 detect the mouth all towards the organism 1 outside sets up, through the honeycomb hole that sets up on the organism 1 and the contact of outside air, detects the concentration value that has the cigarette to spill over the oil net outward, has guaranteed the detection precision of both sides.

Preferably, an oval exhaust port is formed in the middle of the oil screen 201, so that the oil-fat separation degree parameter of the whole range hood is ensured, the width of the exhaust port is selected to be the most suitable air inlet width according to the test result, and the telescopic area baffles are reserved on the two sides of the exhaust port, so that the size of the air inlet area of the oil screen 201 can be kept constant. The position of the air inlet of the range hood can be changed by adjusting the movement of the oil screen 201, and the effect of adjusting the range hood to absorb oil smoke along with the movement of the oil smoke is further realized. The fine adjustment of the position of the oil screen 201 is mainly completed by the middle driving component 3 and the left and right sliding rail components 4 together. The middle driving assembly 3 is divided into two parts, namely a driving motor 301 and a transmission rod 302, wherein the driving motor 301 adopts a subdividable linear stepping motor and provides driving force for the oil screen 201 to slide up and down in the direction of the inclined plane of the machine body 1, the driving force is transmitted to the oil screen 201 through the transmission rod 302, a push rod of the driving motor 301 is connected with the transmission rod 302 through a hole bolt 304, the transmission rod 302 adopts a die casting, and the transmission rod 302 is fixed on a pre-installed fixing plate of the oil screen 201 through a screw. Whole drive assembly 2 uses protection casing 9 and smoke collecting cavity 11 isolated, and protection casing 9 is fixed at transfer line fixed plate 303 upside, can reciprocate along with oil net subassembly 2. Slide rail set spare 4 comprises guide rail 401 and slider 402, and left and right sides slide rail set spare 4 is the same with second oil smoke sensor 6, third oil smoke sensor 7, all installs in whole left and right side edge column 8, keeps apart with smoke collecting cavity 11, prevents that greasy dirt deposit guide rail from fixing from top to bottom at the panel inboard, controls slider 402 and falls by mistake and fix in oil net 201 inboard, but the smooth-going slip of assurance oil net subassembly 2 is to the extrusion force of both sides to balanced drive assembly 3.

The specific workflow of this embodiment is as follows:

according to the data detected when the range hood is just started, the working state of the sensor is selected, if only the left stove is used, the first oil smoke sensor 5 and the second oil smoke sensor 6 are selected to simultaneously detect, two groups of data are comprehensively distinguished, the change of all movement states of oil smoke generated by the left stove head under the current state is covered, and meanwhile, the two groups of data are compared and corrected, so that the measurement and control reliability is improved, and the response speed is accelerated. Similarly, only the right stove is used, and the first lampblack sensor 5 and the third lampblack sensor 7 are selected. When the multiple burner is used simultaneously, the three position oil smoke sensors detect simultaneously, and the multiple groups of data reflect the oil smoke motion state together. And establishing a measurement and control model according to the early test data, wherein the three states are respectively set as a first state (only using the left stove), a second state (simultaneously using two stoves) and a third state (only using the right stove) in the model. In this embodiment, the rotation direction of the fan generating the suction force of the range hood is clockwise, that is, the suction force generated by the range hood is different from the oil smoke suction force overflowing from the left and right sides, specifically, the oil smoke suction force overflowing from the left side due to the downward movement of the oil mesh component in the range hood is enhanced, and the oil smoke suction force overflowing from the right side due to the upward movement of the oil mesh component is enhanced.

In the first state, the first concentration threshold of the second soot sensor 6 is Da1, the second concentration threshold is Da2, the first concentration threshold of the first soot sensor 5 is Db1, and the second concentration threshold is Db 2.

In the second state, the first concentration threshold of the second soot sensor 6 is Da3, the second concentration threshold is Da4, the first concentration threshold of the third soot sensor 7 is Dc1, and the second concentration threshold is Dc 2.

In the third state, the third soot sensor 7 is set to have the first density threshold value Dc3, the second density threshold value Dc4, the first soot sensor 5 has the first density threshold value Db3, and the second density threshold value Db 4.

Wherein Da1 is more than Da2, Da3 is more than Da4, Db1 is more than Db2, Db3 is more than Db4, Dc1 is more than Dc2, and Dc3 is more than Dc 4.

According to the difference of detection conditions of different positions, setting the detection holding time TH of the second lampblack sensor 6 in the first state, wherein the first time threshold is Ta1, the second time threshold is Ta2, the first time threshold of the first lampblack sensor 5 is Tb1, and the second time threshold is Tb 2; setting the detection holding time TH of the second lampblack sensor 6 in the second state, wherein the first time threshold is Ta3, the second time threshold is Ta4, the first time threshold of the third lampblack sensor 7 is Tc1, and the second time threshold is Tc 2; the third soot sensor 7 in the third state is set to detect the holding time TH, the first time threshold is Tc3, the second time threshold is Tc4, the first time threshold of the first soot sensor 5 is Tb3, and the second time threshold is Tb 4. Wherein Ta1 is more than Ta2, Ta3 is more than Ta4, Tb1 is more than Tb2, Tb3 is more than Tb4, Tc1 is more than Tc2, and Tc3 is more than Tc 4.

If the range hood detects that only the left stove is opened at the beginning of one operation, the second oil smoke sensor 6 and the first oil smoke sensor 5 are selected for monitoring at the same time, if the detected concentration value Da of the second oil smoke sensor 6 is larger than the first concentration threshold Da1 of the second oil smoke sensor 6 and the detection retention time TH exceeds the first time threshold Ta1, it is judged that the oil smoke movement track is deviated to the left and the oil smoke overflows, a model is established according to experimental data, the driving assembly 3 is controlled to perform position downward shifting adjustment on the oil mesh 201, and a positive correlation relationship that L1 Da is K1 exists in a downward shifting distance L1 is formed. Meanwhile, detection data after continuous feedback and regulation are controlled in a closed loop mode to achieve an ideal effect, when the detection concentration value Da of the second oil smoke sensor 6 is smaller than a second concentration threshold Da2 of the second oil smoke sensor 6 and the detection retention time TH exceeds a second time threshold Ta2, the oil screen 201 is judged to reach an optimal operation position, and the range hood has the best oil smoke absorption effect. If the second soot sensor 6 detects the concentration value Da less than Da1, and meanwhile, the detection value Db of the first soot sensor 5 is greater than the first concentration threshold Db1, and the detection retention time TH exceeds the first time threshold Tb1, it may be determined that the soot movement trajectory is shifted to the right, the oil grid 201 is adjusted to move upward according to the model control driving assembly 3, and a positive correlation relationship of L2 ═ K2 ═ Db exists in the upward movement distance L2. Meanwhile, the detection data after the adjustment is continuously fed back, the closed-loop control is performed to adjust the ideal effect, and when the detection concentration value Db of the first oil smoke sensor 5 is smaller than the second concentration threshold Db2 of the first oil smoke sensor 5 and the detection retention time TH exceeds the second time threshold Tb2, the oil network 201 is judged to reach the optimal operation position. After the period adjustment is finished, data are temporarily stored and analyzed, and model comparison and correction are carried out after cooking is finished.

When the range hood detects that the two end burners are used simultaneously, the second oil smoke sensor 6 and the third oil smoke sensor 7 are selected for monitoring simultaneously, if the detected concentration value Da of the second oil smoke sensor 6 is larger than the first concentration threshold Da3 of the second oil smoke sensor 6 and the detection retention time TH exceeds the first time threshold Ta3, it is judged that the oil smoke movement track is deviated to the left, the oil smoke overflows, a model is established according to experimental data, the driving assembly 3 is controlled to perform position downward shifting adjustment on the oil net 201, and a positive correlation relationship of L3 & ltK 3 & gtDa & lt is existed in the downward shifting distance L3. Meanwhile, detection data after continuous feedback and regulation are controlled in a closed loop mode to achieve an ideal effect, when the detection concentration value Da of the second oil smoke sensor 6 is smaller than a second concentration threshold Da4 of the second oil smoke sensor 6 and the detection retention time TH exceeds a second time threshold Ta4, the oil screen 201 is judged to reach an optimal operation position, and the range hood has the best oil smoke absorption effect. If the second oil smoke sensor 6 detects the concentration value Da and if Da is less than Da3, and meanwhile, the detection value Dc of the third oil smoke sensor 7 is greater than the first concentration threshold value Dc1 and the detection retention time TH exceeds the first time threshold value Tc1, it can be determined that the oil smoke motion trajectory is shifted to the right, the oil mesh 201 is adjusted to be shifted upwards by the model control driving assembly 3, and a positive correlation relationship of L4-K4 Dc exists in the upward shifting distance L4. Meanwhile, the detection data after the adjustment is continuously fed back, the closed-loop control is performed to adjust the ideal effect, and when the detection concentration value Dc of the third oil smoke sensor 7 is smaller than the second concentration threshold value Dc2 of the third oil smoke sensor 7 and the detection holding time TH exceeds the second time threshold value Tc2, it is determined that the oil mesh 201 reaches the optimal operation position. After the period adjustment is finished, data are temporarily stored and analyzed, and model comparison and correction are carried out after cooking is finished.

When the range hood detects that only the right stove is opened, the third oil smoke sensor 7 and the first oil smoke sensor 5 are selected for monitoring at the same time, if the concentration value Dc detected by the third oil smoke sensor 7 is larger than a first concentration threshold Dc3 of the third oil smoke sensor 7 and the detection retention time TH exceeds a first time threshold Tc3, the situation that the oil smoke movement track is deviated to the right and the oil smoke overflows is judged, a model is established according to experimental data, the driving assembly 3 is controlled to perform position upward movement adjustment on the oil net 201, and a positive correlation relationship that L5 is K5 Dc exists in the upward movement distance L5. Meanwhile, the detection data after the adjustment is continuously fed back and controlled in a closed loop mode to achieve an ideal effect, when the detection concentration value Dc of the third oil smoke sensor 7 is smaller than a second concentration threshold Dc4 of the third oil smoke sensor 7 and the detection retention time TH exceeds a second time threshold Tc4, the oil screen 201 is judged to reach the optimal operation position, and the oil smoke absorption effect of the range hood is the best. If the third oil smoke sensor 7 detects a concentration value Dc, if Dc is less than Dc3, and meanwhile, the detection value Db of the first oil smoke sensor 5 is greater than the first concentration threshold Db3, and the detection retention time TH exceeds the first time threshold Tb3, it can be determined that the oil smoke motion track is shifted to the left, the oil mesh 201 is controlled and adjusted to move downwards according to the model, and the positive correlation relationship of L6 to K6 < Db exists in the downward movement distance L6. Meanwhile, the detection data after the adjustment is continuously fed back, the closed-loop control is performed to adjust the ideal effect, and when the detection concentration value Db of the first oil smoke sensor 5 is smaller than the second concentration threshold Db4 of the first oil smoke sensor 5 and the detection retention time TH exceeds the second time threshold Tb4, the oil network 201 is judged to reach the optimal operation position. After the period adjustment is finished, data are temporarily stored and analyzed, and model comparison and correction are carried out after cooking is finished.

To sum up, the embodiment of the utility model provides a range hood can realize the intelligent regulation of the oil net 201 position of lampblack absorber, cooks the in-process at the user and utilizes intelligent control method, and furthest improves range hood oil absorption cigarette efficiency, improves the operation effect of range hood in the in-service use.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A range hood, comprising:

2. The range hood of claim 1, wherein a protective box is sleeved on the soot sensor.

3. The range hood of claim 1, wherein a filter screen is installed on the side of the opening of the detection port of the soot sensor.

4. The range hood of claim 1, wherein there are three soot sensors, namely a first soot sensor, a second soot sensor and a third soot sensor, the first soot sensor is mounted on the oil screen assembly, and the second soot sensor and the third soot sensor are respectively disposed on two sides of the machine body.

5. The range hood of claim 4, wherein the first soot sensor detecting port is disposed downward.

6. The range hood of claim 4, wherein the second soot sensor and the third soot sensor are disposed at the detecting opening toward the outer side of the body.

7. The range hood of claim 1, wherein the oil screen assembly comprises an oil screen, and an upper baffle and a lower baffle are respectively arranged on the upper side and the lower side of the oil screen.

8. The range hood of claim 7 wherein a drain is provided in the middle of the oil screen, and retractable area baffles are provided on both sides of the drain.

9. The range hood of claim 1, wherein an oil cup is disposed at the bottom of the body.

10. The range hood of claim 1 wherein a hood is mounted on the drive assembly.