Oil smoke monitoring device

Abstract

The present invention discloses an oil fume monitoring device, which specifically relates to the technical field of oil fume monitoring, including a monitoring mechanism and a control mechanism. The monitoring mechanism includes a monitoring probe arranged in an exhaust pipe, the monitoring probe is electrically connected to a collector in a controller, one end of the exhaust pipe is connected to the range hood, and the other end of the exhaust pipe is provided with an exhaust port and a circulation port, the circulation port is connected to a secondary processing mechanism through a circulation pipe, the control mechanism includes an electric valve arranged at the junction of the exhaust port and the circulation port, the electric valve controller is electrically connected, the monitoring probe collects oil fume data and transmits the data to the collector and the controller, and when the collected oil fume data reaches a high value and cannot be discharged, the electric valve connected to the junction of the exhaust port and the circulation port is controlled to close the oil fume flow through the circulation pipe to the secondary processing mechanism, which can prevent the purifier from completely purifying or treat the oil fume during maintenance, so that the oil fume meets the emission standard.

Description

Technical Field

[0001] The present invention relates to the field of oil fume monitoring, and in particular to an oil fume monitoring device. Background Art

[0002] In order to protect the air environment, the oil fume emissions generated in catering and industry need to be monitored. In order to monitor the emissions of enterprises, the existing technology uses monitoring equipment to monitor oil fume emissions, including real-time data on oil fume concentration, particulate matter, and non-methane total hydrocarbons, and transmits the collected data to the monitoring platform through communication, providing effective data for environmental monitoring.

[0003] For example, patent application CN112649337B discloses an online oil fume monitoring method and device, wherein the online oil fume monitoring method includes the following steps: collecting oil fume samples in the flue in real time; obtaining the number of particulate matter in the oil fume sample; obtaining the concentration of the particulate matter in the oil fume sample based on the number of particulate matter in the oil fume sample and the volume of the oil fume sample; predicting the concentration of the particulate matter in the oil fume sample at the next moment based on the particulate matter concentration at different times; and treating the oil fume gas in the flue based on the prediction result at the next moment. The online oil fume monitoring method and device provided in this application can monitor and predict oil fume online, thereby reflecting the actual emission of oil fume, and on this basis, can also accurately treat the oil fume gas.

[0004] However, since the purified oil fume may still fail to meet the emission standards and the oil fume purifier may need to be cleaned, in this case, if the company still needs to produce, the generated oil fume cannot be purified. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil smoke monitoring device to solve the technical problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A fume monitoring device includes a monitoring mechanism and a control mechanism. The monitoring mechanism includes a monitoring probe arranged in the fume exhaust duct, the monitoring probe is electrically connected to a collector in the controller, one end of the fume exhaust duct is connected to the range hood, and the other end of the fume exhaust duct is provided with an exhaust port and a circulation port, the circulation port is connected to a secondary processing mechanism through a circulation pipe, the control mechanism includes an electric valve arranged at the junction of the exhaust port and the circulation port, the electric valve controller is electrically connected, the fume data is collected by the monitoring probe and the data is transmitted to the collector, the collector transmits the data to the controller, when the collected fume data reaches a high value and cannot be discharged, the electric valve connected to the junction of the exhaust port and the circulation port is controlled to close the fume flow through the circulation pipe to enter the secondary processing mechanism, the fume after secondary treatment is discharged from the exhaust port, which can make the fume meet the emission standards if the purifier is not completely purified or the purifier processes the fume during maintenance.

[0008] Preferably, the secondary treatment mechanism includes a treatment chamber connected to the middle of the circulation pipe, the bottom end of the treatment chamber is connected to the spray pipe, the spray pipe is connected to the spray chamber, the spray chamber is arranged at the top of the circulation pipe, and the side of the treatment chamber is connected to the exhaust port through the secondary exhaust pipe. The secondary treatment mechanism adopts a method of adding treatment liquid in the treatment chamber, and the internal pressure of the treatment chamber is increased after the oil fume airflow enters the treatment chamber. The treatment liquid is sprayed out from the spray chamber under pressure and mixed with the oil fume airflow in the circulation pipe, so that the particulate matter in the oil fume airflow is settled and the harmful substances therein are absorbed.

[0009] Preferably, a turntable is rotatably connected in the treatment chamber, and a plurality of water buckets in a circular array are fixedly connected to the side of the turntable. The side of the turntable is rotatably connected to the baffle through a pin shaft. The turntable with a baffle is provided in the treatment chamber. The turntable can rotate when air flows. The water bucket carries a certain amount of treatment liquid, is lifted to a certain height, and then dumped to form a liquid curtain. When the air passes through, the substances in the air flow are absorbed and filtered to ensure that the air flow meets the emission standards.

[0010] Preferably, the monitoring probe is inserted into the conducting tube on the side of the smoke exhaust duct, and a monitoring port is provided on the side of the conducting tube. The monitoring probe is connected to the outer end of the conducting tube through a thread, and the outside of the smoke exhaust duct is connected to the liquid cavity. The liquid cavity is connected to the cleaning mechanism through the conducting tube running through the side of the smoke exhaust duct. The monitoring probe is inserted into the conducting tube and the outer end is connected by a threaded connection to facilitate the removal and replacement of the monitoring probe. The cleaning mechanism is provided to clean the monitoring probe without removing it, thereby ensuring the monitoring accuracy of the monitoring probe and extending its service life.

[0011] Preferably, the liquid guide tube is U-shaped, and the cleaning mechanism includes a cleaning cylinder slidably connected to the inner end of the liquid guide tube, the cleaning cylinder is plugged into the conducting tube, and a spring connected to the inner end of the cleaning cylinder is provided at the inner end of the liquid guide tube. The cleaning mechanism adopts the method of plugging the cleaning cylinder into the conducting tube. In the cleaning and non-cleaning states, the interior of the cleaning cylinder and the smoke exhaust channel remain relatively closed, the cleaning liquid will not be discharged into the interior of the smoke exhaust channel, and the smoke in the smoke exhaust channel will not enter the cleaning cylinder to cause the accumulation of smoke oil inside the cleaning cylinder.

[0012] Preferably, an annular fan is rotatably connected inside the cleaning cylinder, a brush is fixedly connected to the inside of the annular fan, a drain port is provided at the right end of the cleaning cylinder, the drain port is connected to the recovery chamber in the liquid chamber through a drain pipe, the liquid chamber is connected to the pressure cylinder, the pressure cylinder is threadedly connected to the pressure rod, the pressure rod is connected to the pressure motor, the pressure motor is electrically connected to the controller, and the annular fan is rotatably connected inside the cleaning cylinder. When the cleaning liquid flows, the annular fan can be driven to rotate so that the brush rotates on the surface of the monitoring probe, so that the stubborn oil stains adhering to the monitoring probe can be cleaned.

[0013] Preferably, the annular fan includes an outer ring that fits with the inner wall of the cleaning barrel and is rotatably connected. The outer ring and the inner ring are fixedly connected by fan blades. The inner side of the inner ring is fixedly connected to a brush. The inner and outer rings are connected by fan blades to form a rotatable annular structure, which can be rotated under fluid drive. The brush fixedly connected to the inner side of the inner ring serves as a cleaning part to clean the monitoring probe without damaging the surface of the monitoring probe.

[0014] Preferably, the electric valve includes a valve stem passing through the side of the smoke exhaust pipe, the valve stem is fixedly connected to the valve core in the smoke exhaust pipe, a smoke exhaust channel is provided in the valve core, and the cross-section of the smoke exhaust channel is T-shaped. The electric valve adopts a valve core with a T-shaped smoke exhaust channel provided inside, which can realize the closure or opening of the exhaust port.

[0015] Preferably, the range hood includes a fan and a purifier, the fan and the purifier are connected via a three-way pipe, and another set of monitoring probes and electric valves are connected inside the three-way pipe.

[0016] Preferably, the monitoring probe, the electric valve and the controller in the three-way pipe are electrically connected.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention sets a circulation port on the side of the smoke exhaust duct and connects the secondary treatment mechanism through a circulation pipe. The controller controls the electric valve at the smoke exhaust port to control the connection between the exhaust port or the circulation port and the smoke exhaust duct. When the smoke detector in the smoke exhaust duct detects a high concentration of oil smoke, the smoke exhaust port can be closed and the smoke is discharged after being treated by the secondary treatment mechanism. It is suitable for use when the purification effect of the oil fume purifier is reduced and maintenance is required, or when the purification effect of the purifier is poor.

[0019] 2. The secondary treatment mechanism adopts the method of adsorption and filtration of the treatment liquid. The operation of the fan in the range hood generates a large pressure in the exhaust pipe, so that the treatment liquid enters the spray chamber through the spray pipe. The treatment liquid is mixed with the smoke and oil airflow in the circulation pipe. At the same time, a turntable with a water bucket is set. The turntable is driven by the airflow to rotate. The water bucket carries the treatment liquid to form a water curtain, which further absorbs and filters the exhaust airflow.

[0020] 3. The monitoring probe is inserted into the conducting tube and fixed by means of screw connections, which makes it easy to remove and replace the monitoring probe. The conducting tube is connected with a cleaning mechanism to clean the monitoring probe, ensuring the accuracy of the data measured by the monitoring probe and extending the service life of the monitoring probe.

[0021] 4. The cleaning mechanism adopts a relative sliding mode between the cleaning cylinder, the liquid guide tube and the conducting tube, so that the interior of the cleaning cylinder always remains relatively closed relative to the smoke exhaust pipe. The pressurized tube sliding in the pressurized cylinder connected to the liquid chamber is driven by a pressurized motor. The controller controls the operation of the pressurized motor to make the cleaning liquid in the liquid chamber flow into the cleaning cylinder through the liquid guide tube and then into the recovery chamber through the return pipe, thereby achieving gas cleaning of the monitoring probe, preventing the cleaning liquid from entering the smoke exhaust channel and avoiding the accumulation of oil smoke particles inside the cleaning cylinder.

[0022] 5. The annular fan is a method of connecting the fan blades between the inner ring and the outer ring so that it can rotate under the drive of the airflow. The inner side of the inner ring is connected with a brush so that when the monitoring probe is flushed by the cleaning liquid, the brush can be aligned with the surface for brushing, thereby improving the cleaning degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 is a cross-sectional view of the smoke exhaust duct of the present invention;

[0025] Figure 3 It is a partial cross-sectional view of the spray chamber of the present invention;

[0026] Figure 4 is a cross-sectional view of the spray chamber of the present invention;

[0027] Figure 5 is a cross-sectional view of the spray channel of the present invention;

[0028] Figure 6 It is a structural schematic diagram of the turntable of the present invention;

[0029] Figure 7 It is a cross-sectional view of the conducting tube, the liquid guiding tube and the liquid draining tube of the present invention;

[0030] Figure 8 is a cross-sectional view of the cleaning cartridge of the present invention;

[0031] Figure 9 It is a cross-sectional view of the liquid chamber of the present invention.

[0032] In the figure: 1. range hood; 2. exhaust duct; 21. guide pipe; 22. liquid guide pipe; 23. liquid drain pipe; 231. monitoring probe; 24. cleaning cylinder; 241. tension spring; 242. annular fan; 2421. outer ring; 2422. inner ring; 2423. fan blades; 2424. brush; 3. electric valve; 4. exhaust port; 5. circulation pipe; 6. spray pipe; 61. spray chamber; 62. partition; 63. guide cylinder; 64. spray cylinder; 65. flow control cylinder; 66. flow control plug; 67. nozzle; 671. spray hole; 7. processing chamber; 71. turntable; 72. water bucket; 73. baffle; 8. secondary exhaust pipe; 9. liquid chamber; 91. controller; 92. pressurizing motor; 921. pressurizing screw; 93. recovery chamber. DETAILED DESCRIPTION

[0033] Example 1

[0034] like Figure 1-6 As shown, a fume monitoring device includes a monitoring mechanism and a control mechanism, wherein the monitoring mechanism includes a monitoring probe 231 arranged in the exhaust pipe 2, the monitoring probe 231 is electrically connected to the collector in the controller 91, one end of the exhaust pipe 2 is connected to the range hood 1, and the other end of the exhaust pipe 2 is provided with an exhaust port and a circulation port, the circulation port is connected to the secondary processing mechanism through the circulation pipe 5, the control mechanism includes an electric valve 3 arranged at the junction of the exhaust port and the circulation port, and the electric valve 3 is electrically connected to the controller 91; the secondary processing mechanism includes a processing chamber 7 connected to the middle of the circulation pipe 5, the bottom end of the processing chamber 7 is connected to the spray pipe 6, the spray pipe 6 is connected to the spray chamber 61, the spray chamber 61 is arranged at the top of the circulation pipe 5, and the side of the processing chamber 7 is connected to the exhaust port 4 through the secondary exhaust pipe 8; the processing chamber 7 is rotatably connected to a turntable 71, and the side of the turntable 71 is fixedly connected to multiple water buckets 72 in a ring array, and the side of the turntable 71 is rotatably connected to the baffle 73 through a pin shaft.

[0035] A circulation port is provided on the side of the smoke exhaust pipe 2, and the circulation port is connected to the processing chamber 7 in the secondary processing mechanism through the circulation pipe 5. The processing liquid is filled in the processing chamber 7. The processing liquid adopts a certain concentration of alcohol, which can not only absorb the organic matter in the smoke oil, but also filter the particulate matter in the smoke. An electric valve 3 controlled by the controller 91 is provided at the intersection of the circulation port and the exhaust port. When the monitoring probe 231 monitors that the smoke oil concentration and the particulate matter content in the smoke flowing into the smoke exhaust pipe 2 after purification do not meet the emission standards, the controller 91 controls the valve core in the electric valve 3 to rotate, so that the smoke exhaust pipe 2 is connected with the circulation pipe 5, and the exhaust port is closed, so that the smoke airflow enters the circulation pipe 5 and enters the secondary The treatment mechanism is used for treatment. Under the action of the fan in the range hood 1, a pressure greater than that in the spray pipe 6 is generated inside the circulation pipe 5, so that the treatment liquid in the treatment chamber 7 flows into the spray chamber 61 through the spray pipe 6. A partition 62 is provided in the middle of the spray chamber 61, and a guide tube 63 is provided below the partition 62 and is connected to the top of the partition 62. The guide tube 63 is connected to the spray tube 64 through a baffle tube 65. The bottom end of the spray tube 64 is connected to the nozzle 67 connected to the bottom end of the spray chamber 61. A sliding baffle plug 66 is provided in the baffle tube 65. The treatment liquid enters the spray chamber 61 through the spray pipe 6 and enters the guide tube 63. The treatment liquid is discharged from the guide tube 63 and the baffle 62 above the spray chamber 61. When a certain amount of treatment liquid accumulates, the water pressure can drive the flow blocking plug 66 to slide in the flow blocking cylinder 65 to the spray cylinder 64 and connect with the guide cylinder 63, so that the treatment liquid is sprayed out from the nozzle 67 in the nozzle hole 671, and mixed with the oil smoke airflow in the circulation pipe 5, and the particulate matter and organic matter in the airflow are settled and absorbed, thereby treating the oil smoke airflow; a rotating turntable 71 is provided in the treatment chamber 7, and a baffle 73 is connected to the turntable 71. When adding treatment liquid, the height of the treatment liquid is flush with the shaft connected to the turntable 71. When the airflow flows through the turntable 71, the baffle 73 connected to the turntable 71 is rotated by the impact of the airflow, and the water bucket 72 connected to the turntable 71 carries a certain amount of treatment liquid. The treated liquid rises in an amount, and the water bucket 72 is set to a semi-cylindrical shape. The treated liquid in the water bucket 72 flows out from the edge of the water bucket 72 during the rising process to form a water curtain, so that the oil fume airflow that has been sprayed is purified again through the water curtain formed by the treated liquid, thereby achieving a full purification effect. The baffle 73 is rotatably connected to the turntable 71 and the water bucket 72 is used as a blocking member, so that the baffle 73 is in a rotatable state in the treated liquid, reducing the resistance of the treated liquid to the turntable 71. When the baffle 73 rotates to above the shaft, the baffle 73 naturally falls under the action of gravity, and the side of the baffle 73 collides with the outer side of the adjacent water bucket 72, so that the baffle 73 can be subjected to a more comprehensive airflow impact.

[0036] Example 2

[0037] like Figure 1-9As shown, a fume monitoring device includes a monitoring mechanism and a control mechanism. The monitoring mechanism includes a monitoring probe 231 arranged in the exhaust pipe 2, and the monitoring probe 231 is electrically connected to the collector in the controller 91. One end of the exhaust pipe 2 is connected to the range hood 1, and the other end of the exhaust pipe 2 is provided with an exhaust port and a circulation port. The circulation port is connected to the secondary processing mechanism through a circulation pipe 5. The control mechanism includes an electric valve 3 arranged at the intersection of the exhaust port and the circulation port, and the electric valve 3 is electrically connected to the controller 91. The monitoring probe 231 is inserted into the guide tube 21 on the side of the exhaust pipe 2, and the side of the guide tube 21 is provided with a monitoring port. The monitoring probe 231 is connected to the outer end of the guide tube 21 through a thread, and the outside of the exhaust pipe 2 is connected to the liquid cavity 9. The liquid cavity 9 is connected to the cleaning mechanism through the guide tube 22 that runs through the side of the exhaust pipe 2; the guide tube 22 It is U-shaped, and the cleaning mechanism includes a cleaning cylinder 24 that is slidably connected to the inner end of the liquid guide tube 22. The cleaning cylinder 24 is plugged into the conducting tube 21, and a spring connected to the inner end of the cleaning cylinder 24 is provided at the inner end of the liquid guide tube 22; an annular fan 242 is rotatably connected to the cleaning cylinder 24, and a brush 2424 is fixedly connected to the inner side of the annular fan 242. A drain port is provided at the right end of the cleaning cylinder 24, and the drain port is connected to the recovery chamber 93 in the liquid chamber 9 through the drain pipe 23. The liquid chamber 9 is connected to the pressurizing cylinder, and the pressurizing rod is connected to the pressurizing motor 92, and the pressurizing motor 92 is electrically connected to the controller 91; the annular fan 242 includes an outer ring 2421 that fits and is rotatably connected to the inner wall of the cleaning cylinder 24, the outer ring 2421 is fixedly connected to the inner ring 2422 by fan blades 2423, and the inner side of the inner ring 2422 is fixedly connected to the brush 2424.

[0038] When the monitoring mechanism is installed, a guide tube 21 is connected to the side of the smoke exhaust pipe 2, which extends through the smoke exhaust pipe 2 and into the interior of the smoke exhaust pipe 2. The outer end of the guide tube 21 is provided with an external thread. The liquid guide tube 22 extends through the smoke exhaust pipe 2 and into the interior of the smoke exhaust pipe 2. The inner end of the liquid guide tube 22 is U-shaped. The tail end of the liquid guide tube 22 is flush with the guide tube 21. The cleaning cylinder 24 is slidably arranged in the liquid guide tube 22. The outer end of the liquid guide tube 22 is communicated with the upper part of the liquid cavity 9. The right end of the cleaning cylinder 24 is communicated with the drain pipe 23 which runs through the side of the smoke exhaust pipe 2. The outer end of the drain pipe 23 is communicated with the recovery cavity 93 at the lower part of the liquid cavity 9. The monitoring probe 231 is plugged into The inside of the conducting tube 21 and the inner end of the monitoring probe 231 are located at a portion where a through hole is provided on the side of the conducting tube 21. During monitoring, the monitoring probe 231 monitors the content of harmful substances in the oil smoke airflow through the through hole. After the monitoring probe 231 has been used for a period of time, the oil smoke may adhere to the monitoring probe 231, resulting in reduced monitoring sensitivity. At this time, the controller 91 controls the pressure motor 92 to rotate, and the pressure rod rotates accordingly. The pressure rod adopts a pressure screw 921 threadedly connected to the pressure plate. The pressure plate sliding in the liquid cavity 9 moves in the liquid cavity 9, so that the cleaning liquid enters the cleaning cavity from the conducting tube 22 under a certain pressure. In the cleaning cylinder 24, the water pressure in the cleaning cylinder 24 increases, causing the cleaning cylinder 24 to slide to the right relative to the liquid guide tube 22, and the tension spring 241 is stretched until the cleaning cylinder 24 is located outside the through hole where the end of the detection probe is located. At this time, the annular fan 242 is located outside the through hole. Under the drive of the fluid, the fan blades 2423 located between the outer ring 2421 and the inner ring 2422 are acted upon by the fluid to cause the annular fan 242 to rotate, thereby causing the brush 2424 inside the inner ring 2422 to rotate on the surface of the monitoring probe 231 to clean the monitoring probe 231. The monitoring probe 231 can be cleaned by flushing with the cleaning liquid, and the liquid flowing through the monitoring probe 231 can be cleaned. The cleaning liquid on the surface of the probe 231 enters the drain pipe 23 from the right end of the cleaning cylinder 24, and then enters the recovery chamber 93. During this process, the cleaning liquid can be prevented from falling into the smoke exhaust pipe 2. The brush 2424 in the cleaning cylinder 24 remains relatively isolated from the smoke exhaust pipe 2 in both the cleaning state and the non-cleaning state, which can prevent the brush 2424 from being in long-term contact with the oil smoke airflow and contamination affecting the brushing effect. The right end of the cleaning cylinder 24 is connected to the drain pipe 23 through a plug-in tube. After the cleaning is completed, when the water pressure drops, the cleaning cylinder 24 slides to the left under the action of the tension spring 241 until the through hole leaks out, and can continue monitoring for a long time.

[0039] Example 3

[0040] like Figure 1-9As shown, a fume monitoring device includes a monitoring mechanism and a control mechanism, wherein the monitoring mechanism includes a monitoring probe 231 arranged in the exhaust pipe 2, the monitoring probe 231 is electrically connected to the collector in the controller 91, one end of the exhaust pipe 2 is connected to the range hood 1, and the other end of the exhaust pipe 2 is provided with an exhaust port and a circulation port, the circulation port is connected to the secondary processing mechanism through a circulation pipe 5, the control mechanism includes an electric valve 3 arranged at the junction of the exhaust port and the circulation port, the electric valve 3 is electrically connected to the controller 91, the electric valve 3 includes a valve stem passing through the side of the exhaust pipe 2, the valve stem is fixedly connected to the valve core in the exhaust pipe 2, a smoke exhaust channel is provided in the valve core, and the cross-section of the smoke exhaust channel is T-shaped, the range hood 1 includes a fan and a purifier, the fan and the purifier are connected by a tee, another group of monitoring probes 231 and electric valves 3 are connected in the tee, and the monitoring probe 231 and electric valve 3 in the tee are electrically connected to the controller 91.

[0041] The exhaust channel in the valve core of the electric valve 3 is set to T shape, such as Figure 2 As shown, the valve core rotates 90° clockwise to close the exhaust port and connect the smoke exhaust duct 2 with the circulation port. The fan and the purifier in the range hood 1 are connected by a three-way pipe, and a monitoring probe 231 and an electric valve 3 are set, which are not shown in the figure. When the oil smoke content is small, the airflow bypasses the purifier and directly enters the smoke exhaust duct 2 and is discharged from the smoke exhaust port 4, thereby improving the smoke exhaust efficiency.

Claims

1. A fume monitoring device, characterized in that: It includes a monitoring mechanism and a control mechanism. The monitoring mechanism includes a monitoring probe arranged in the smoke exhaust duct, the monitoring probe is electrically connected to the collector in the controller, one end of the smoke exhaust duct is connected to the range hood, and the other end of the smoke exhaust duct is provided with an exhaust port and a circulation port, the circulation port is connected to the secondary processing mechanism through a circulation pipe, and the control mechanism includes an electric valve arranged at the intersection of the exhaust port and the circulation port, and the electric valve is electrically connected to the controller; The secondary treatment mechanism includes a treatment chamber connected to the middle of the circulation pipe, the bottom of the treatment chamber is connected to the spray pipe, the spray pipe is connected to the spray chamber, the spray chamber is arranged on the top of the circulation pipe, and the side of the treatment chamber is connected to the exhaust port through the secondary exhaust pipe; A turntable is rotatably connected in the treatment chamber, and a plurality of water buckets in a circular array are fixedly connected to the side of the turntable, and the side of the turntable is rotatably connected to the baffle through a pin shaft; The monitoring probe is inserted into the guide tube on the side of the smoke exhaust pipe. A monitoring port is provided on the side of the guide tube. The monitoring probe is connected to the outer end of the guide tube through a thread. The outer side of the smoke exhaust pipe is connected to the liquid cavity. The liquid cavity is connected to the cleaning mechanism through the guide tube running through the side of the smoke exhaust pipe. The catheter is U-shaped, and the cleaning mechanism includes a cleaning cylinder slidably connected to the inner end of the catheter, the cleaning cylinder is plugged into the guide tube, and a spring connected to the inner end of the cleaning cylinder is sleeved on the inner end of the catheter; An annular fan is rotatably connected to the inside of the cleaning cylinder, a brush is fixedly connected to the inside of the annular fan, a drain port is provided at the right end of the cleaning cylinder, the drain port is connected to the recovery chamber in the liquid cavity through a drain pipe, the liquid cavity is connected to the pressurizing cylinder, the pressurizing cylinder is threadedly connected to the pressurizing rod, the pressurizing rod is connected to the pressurizing motor, and the pressurizing motor is electrically connected to the controller; The annular fan comprises an outer ring which is in contact with and rotatably connected to the inner wall of the cleaning cylinder. The outer ring is fixedly connected to the inner ring through fan blades, and a brush is fixedly connected to the inner side of the inner ring.

2. The oil smoke monitoring device according to claim 1, characterized in that: The electric valve includes a valve stem penetrating the side of the smoke exhaust pipe, the valve stem is fixedly connected to the valve core in the smoke exhaust pipe, a smoke exhaust channel is provided in the valve core, and the cross section of the smoke exhaust channel is T-shaped.

3. The oil smoke monitoring device according to claim 2, characterized in that: The range hood comprises a fan and a purifier, the fan and the purifier are connected via a three-way pipe, and another set of monitoring probes and an electric valve are connected inside the three-way pipe.

4. The oil smoke monitoring device according to claim 3, characterized in that: The monitoring probe, the electric valve and the controller in the three-way pipe are electrically connected.

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