CN113531615B

CN113531615B - Fume hood type fume purifying device with water film purifying function and control method thereof

Info

Publication number: CN113531615B
Application number: CN202110737979.0A
Authority: CN
Inventors: 尤今; 尤毅
Original assignee: Kelan Technics Environmental Products Co ltd
Current assignee: Kelan Technics Environmental Products Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2023-08-15
Anticipated expiration: 2041-06-30
Also published as: CN113531615A

Abstract

The invention discloses a smoke hood type oil smoke purifying device with a water film purifying function and a control method thereof, wherein an aeration net bag is fixed in a smoke hood, a first water inlet pipe and a second water inlet pipe are arranged above the aeration net bag, a first control valve is connected in series with the first water inlet pipe, a second control valve is connected in series with the second water inlet pipe, a water stop plate is arranged at the lower end of the smoke hood, when the smoke hood is started to be used, water is fed through the second water inlet pipe, a layer of water film is formed in the aeration net bag rapidly, and after the water film reaches a proper thickness, water is fed through the first water inlet pipe, the dissipation of water in the aeration net bag is supplemented, so that the smoke hood can continuously work, the water film formed in the aeration net bag is more convenient to control, and can prevent flames from passing through, and has the functions of heat insulation and fire prevention; through the arrangement of the washing liquid box, the third pipeline and the third hydraulic pump, the detergent can be added into the water, so that substances such as dirt in the smoke are better dissolved in the water, and the purifying effect on the smoke is improved.

Description

Fume hood type fume purifying device with water film purifying function and control method thereof

Technical Field

The invention relates to the field of air purification equipment, in particular to a smoke hood type oil smoke purification device with a water film purification function and a control method thereof.

Background

In the catering industry, a large amount of oil smoke can be generated in the cooking process, in order to reduce the harm of the oil smoke to the health of people, a smoke hood type oil smoke purifying device is generally arranged above a cooking range in the prior art, so that waste gas generated by combustion of the cooking range and the oil smoke generated in the cooking process are rapidly pumped out and discharged outdoors, and the harm of the oil smoke to indoor personnel is reduced. In industrial production, gases are also produced which contain substances or influence the quality of the air.

In the above, in order to protect the environment better, when the flue gas passes through the fume hood type fume purification device, the purification unit inside the fume hood type fume purification device carries out purification treatment on the flue gas, so that the discharged flue gas reaches the discharge standard.

However, the existing fume hood type fume purifying device throws oil dirt in fume out through an oil-water separator under the action of the centrifugal force of the oil-water separator rotating at high speed, and then collects the oil dirt to realize purification. Therefore, the existing smoke hood does not have the functions of heat insulation and flame isolation, when high temperature or flame is blown into the smoke purification device, the smoke purification device is easy to ignite, odor gases are all required to be removed in the smoke purification device, and the purification load of the smoke purification device is improved.

It can be seen that there is a need for improvements and improvements in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a hood-type fume purification device with a water film purification function and a control method thereof, and aims to solve the problem that the existing hood-type fume purification device does not have the functions of heat insulation and flame isolation.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the utility model provides a petticoat pipe formula oil smoke purifier with water film purification performance, includes petticoat pipe and fan, the fan sets up the air-out end at the petticoat pipe, be fixed with aeration string bag, first inlet tube and second inlet tube on the petticoat pipe inner wall, first inlet tube and second inlet tube one end are connected with the water source, the aeration string bag top is put to the other end, the first control valve has been concatenated on the first inlet tube, the second control valve has concatenated on the second inlet tube, first control valve and second control valve are fixed on the smoke mask, the water-stop plate is installed to the petticoat pipe lower extreme, the water-stop plate is arranged in under the aeration string bag, the second inlet tube is used for intaking fast and forms the water film on the aeration string bag, first inlet tube is used for compensating intaking of the loss volume of water film normal water, first control valve and second control valve electric connection have the controller.

In the petticoat pipe formula oil smoke purifier with water film purification performance, still be fixed with the washing liquid case on the petticoat pipe, be connected with the third pipeline on the washing liquid case, the third pipeline is kept away from the washing liquid case and is arranged in the top of aeration string bag, the third hydraulic pump has been concatenated to the third pipeline middle part, the third hydraulic pump is fixed on the petticoat pipe, third hydraulic pump and controller electric connection.

In the petticoat pipe formula oil smoke purifier with water film purification performance, first inlet tube and second inlet tube one end be connected with total inlet tube, first inlet tube and second inlet tube other end are connected with the shunt tubes, the water inlet of shunt tubes respectively with first inlet tube, second inlet tube and third pipe connection, the top of aeration string bag is arranged in to the delivery port of shunt tubes.

The fume hood type fume purifying device with the water film purifying function further comprises a water-proof net, wherein the water-proof net is arranged above the shunt pipe or between the aeration net bag and the shunt pipe, and the water-proof net is fixedly connected with the inner wall of the fume hood.

In the petticoat pipe formula oil smoke purifier with water film purification performance, be fixed with the mounting panel on the petticoat pipe inner wall, aeration string bag, shunt tubes are fixed on the mounting panel, and the water proof net is fixed on the aeration string bag.

In the smoke hood type oil fume purifying device with the water film purifying function, a connecting component is arranged at the lower end of the mounting plate, and the aeration net bag is fixed on the mounting plate through the connecting component; the connecting assembly comprises a rotating shaft and a connecting sheet, the rotating shaft is rotationally connected to the mounting plate, one end of the connecting sheet is connected with the rotating shaft, and the other end of the connecting sheet is connected with the aeration net bag.

In the petticoat pipe formula oil smoke purifier with water film purification performance, the washing liquid case is cylindrically, washing liquid case surface mounting has the latch, the mounting panel is equipped with the through-hole that is used for inserting the washing liquid case, the through-hole border sets up the recess that is used for the latch to pass, the washing liquid case inserts in the through-hole and rotates the washing liquid case, the latch butt is at the top surface of mounting panel.

In the fume hood type fume purifying device with the water film purifying function, a detector is arranged inside the fume hood and above the water stop plate, and the detector is electrically connected with a controller.

The control method of the fume hood type fume purifier with the water film purifying function comprises the following steps:

the controller receives a starting instruction, opens a second control valve and starts a fan, and the second water inlet pipe is fed into the aeration net bag to enable the water to quickly form a water film in the aeration net bag and start timing;

after the set time t is reached, the second control valve is closed, the first control valve is opened, and the first water inlet pipe is filled with water and enters the aeration net bag;

the controller receives the real-time temperature value T1 of the detector, compares the real-time temperature value T with the set temperature value T, judges whether T1 is more than T, and if yes, the controller controls the second control valve to be opened.

In the control method of the smoke hood type oil smoke purifier with the water film purifying function, when the second control valve is opened, the third hydraulic pump is opened at the same time;

when the second control valve is closed, the third hydraulic pump is closed.

In the control method of the smoke hood type oil smoke purifier with the water film purifying function, a controller is provided with timing time t2 and time t3, after a second control valve and a third hydraulic pump are closed, timing is started, after the timing time t2 is reached, the second control valve and the third hydraulic pump are opened, and after the opening time of the second control valve and the third hydraulic pump reaches the timing time t3, the second control valve and the third hydraulic pump are closed; this step is repeated.

The beneficial effects are that: through being fixed with aeration string bag in the petticoat pipe, aeration string bag top is equipped with first inlet tube and second inlet tube, first control valve has been concatenated on the first inlet tube, second control valve has been concatenated on the second inlet tube, the water-stop sheet is installed to the petticoat pipe lower extreme, the water-stop sheet is arranged in under the aeration string bag, when just starting to use, intake through the second inlet tube, make the inside quick one deck water film that forms of aeration string bag, after the water film reaches suitable thickness, it intakes to change with first inlet tube, supplement the dissipation of water in the aeration string bag, make it can work continuously, and more convenient control, the water film that forms in the aeration string bag can play the purifying effect to the flue gas, can also prevent the flame from passing, play thermal-insulated, fire prevention effect; and through the arrangement of the washing liquid box, the third pipeline and the third hydraulic pump, the detergent can be added into the water, so that substances such as dirt in the smoke are better dissolved in the water, and the purifying effect on the smoke is improved.

Drawings

Fig. 1 is a front view of a hood type oil smoke purifying apparatus having a water film purifying function.

Fig. 2 is a front view and a right view of the hood type oil smoke purifying device with a water film purifying function.

Fig. 3 is a front view, bottom plan view of the hood type oil smoke purifying apparatus with a water film purifying function, in which the water blocking plate structure is removed.

Fig. 4 is a schematic view of the structure of the smoke cage and the mounting plate.

Fig. 5 is a schematic view of the structure of the washing liquid tank.

Fig. 6 is a schematic structural view of an aeration net bag and a water-proof net.

Fig. 7 is a schematic diagram of a connection structure of the aeration net bag and the water-proof net.

Fig. 8 is a schematic diagram of the connection structure of the shunt tubes with the first water inlet tube, the second water inlet tube and the third pipeline.

Fig. 9 is a front view of the connection assembly.

Fig. 10 is a bottom view of the connection assembly.

Description of main reference numerals: 1-petticoat pipe, 1.1-through-hole, 1.2-recess, 2-fan, 3-shunt tubes, 4-water-proof net, 5-mounting panel, 6-coupling assembling, 6.1-pivot, 6.2-connection piece, 6.3-screens recess, 6.4-spherical top pearl, 7-washing liquid case, 7.1-latch, 7.2-inlet, 7.3-butt board, 8-aeration string bag, 9-total inlet tube, 10-first control valve, 11-second control valve, 12-controller, 13-first inlet tube, 14-second inlet tube, 15-third pipeline, 16-third hydraulic pump, 17-riser, 18-detector.

Detailed Description

The invention provides a smoke hood type oil smoke purifying device with a water film purifying function, which is used for making the purpose, the technical scheme and the effect of the invention clearer and more definite, and the invention is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, fig. 2 and fig. 3, a hood type fume purification device with water film purification function, including hood 1 and fan 2, fan 2 sets up the air-out end at hood 1, and fan 2 is used for making the inside negative pressure that forms of hood 1, and then makes the flue gas pass hood 1, be fixed with aeration string 8, first inlet tube 13 and second inlet tube 14 on the inner wall of hood 1, first inlet tube 13 and second inlet tube 14 one end are connected with the water source, and the other end is arranged in aeration string 8 and is put the top, has concatenated first control valve 10 on the first inlet tube 13, has concatenated second control valve 11 on the second inlet tube 14, and first control valve 10 and second control valve 11 are fixed on hood 1, and water barrier 17 is installed to hood 1 lower extreme, and water barrier 17 is arranged in under aeration string 8, and second inlet tube 14 is used for quick water and forms the water film on aeration string 8, and first inlet tube 13 is used for the intaking of the loss volume of compensation water film, and first control valve 10 and second control valve 11 electric connection have controller 12, can be the PLC or the singlechip.

In the above, the water pressure of the water source entering the first water inlet pipe 13 and the second water inlet pipe 14 is the same, and the flow rate of the second control valve 11 is greater than that of the first control valve 10, so that the second water inlet pipe 14 can rapidly feed water when the second control valve 11 is opened. When water rapidly flows in through the second water inlet pipe 14, the water entering the aeration net bag 8 can be rapidly distributed on the bottom surface of the aeration net bag 8 and forms a water film, so that the flue gas needs to be purified through the water film when passing through.

Wherein, before the water is fed through the second water inlet pipe 14, the fan 2 can be started first, so that negative pressure is formed in the aeration net bag 8, and the amount of water dropping on the water stop plate 17 under the action of gravity is reduced.

After the water is quickly fed into the water tank through the second water inlet pipe 14 and a water film is formed, the first water inlet pipe 13 is used for feeding water, namely the second control valve 11 is closed, the first control valve 10 is opened, when the first water inlet pipe 13 feeds water, the water flow is smaller, the water is used for compensating the water loss amount of the water film, and the water loss amount of the water is only the water gas taken away by the flue gas, and drops on the water drop plate 17, so that the shape of the water film can be kept in the aeration net bag 8.

In the above, through the arrangement of the first water inlet pipe 13 and the second water inlet pipe 14, and the first control valve 10 and the second control valve 11 with different flow rates are respectively arranged on the first water inlet pipe 13 and the second water inlet pipe 14, so that the water inlet amount entering the aeration net bag 8 from the first water inlet pipe 13 and the second water inlet pipe 14 is conveniently controlled, and therefore, the whole smoke hood 1 type smoke purifying device is more conveniently controlled.

The time for which the second control valve 11 is opened at the start of operation may be set according to actual operation needs.

Because the fan 2 makes the negative pressure formed in the petticoat pipe 1, consequently, after water falls in the aeration string bag 8, forms the water film of certain thickness, only the weight of waiting the water film is greater than the pressure of negative pressure, just can drip from the aeration string bag 8, consequently, because the fan 2 makes the negative pressure that forms in the petticoat pipe 1, can make the water film have certain thickness.

When purifying the flue gas, the flue gas passes through the water film, and the steam bubble film plays roles in blocking greasy dirt, peculiar smell and the like, plays a role in purifying, and can play a role in blocking flame and hot gas. Specifically, when the flue gas passes through the steam bubble film, as the flue gas is a mixed gas containing a plurality of substance components, part of the gas can be dissolved in water, such as chlorine gas forming the main component of odor, and the like, and when the flue gas passes through the steam bubble film, the flue gas contacts with and is dissolved in water, and is carried away by the water; and when substances such as oil stains pass through the water vapor bubble film, the water vapor bubble film plays a role in blocking, so that part of the substances such as oil stains are blocked, and the flue gas purification is realized.

In a preferred embodiment, the hood 1 is further fixed with a washing liquid tank 7, the washing liquid tank 7 is connected with a third pipeline 15, the third pipeline 15 is far away from the washing liquid tank 7 and is arranged above the aeration net bag 8, the middle part of the third pipeline 15 is connected with a third hydraulic pump 16 in series, the third hydraulic pump 16 is fixed on the hood 1, and the third hydraulic pump 16 is electrically connected with the controller 12. The fume hood 1 fume purifying device is used in fume purifying treatment, and the fume contains oil and other matters, so that the fume can be treated with detergent to eliminate oil and other matters. In the preferred embodiment, the washing liquid tank 7 is fixed on the smoke hood 1, the washing liquid tank 7 is fixed and communicated with the aeration net bag 8 through the third pipeline 15, the middle part of the third pipeline 15 is connected with the third hydraulic pump 16 in series, and the detergent contained in the washing liquid tank 7 can be pumped into the water film in the aeration net bag 8 by starting the third hydraulic pump 16, so that the smoke contacts with the water film containing the detergent when passing through the aeration net bag 8, and the oil stain and other substances in the smoke are dissolved in the water film.

In a preferred embodiment, for convenience of pipe connection, one end of the first water inlet pipe 13 and one end of the second water inlet pipe 14 are connected with the main water inlet pipe 9, the other end of the first water inlet pipe 13 and the other end of the second water inlet pipe 14 are connected with the split-flow pipe 3, water inlets of the split-flow pipe 3 are respectively connected with the first water inlet pipe 13, the second water inlet pipe 14 and the third pipe 15, and water outlets of the split-flow pipe 3 are arranged above the aeration net bags 8. Wherein, through a total inlet tube 9, realize first inlet tube 13 and second inlet tube 14 and the connection of water source, and shunt tubes 3 are the preferred annular, and the border setting of the corresponding aeration string bag 8 of annular shunt tubes 3, and the delivery port of shunt tubes 3 can evenly distributed around aeration string bag 8. Through the arrangement, the use of pipelines can be reduced, connection is convenient, and water can be rapidly and uniformly distributed in the aeration net bags 8.

In a preferred embodiment, the device further comprises a water-proof net 4, wherein the water-proof net 4 is arranged above the shunt tubes 3 or between the aeration net bags 8 and the shunt tubes 3, and the water-proof net 4 is fixedly connected with the inner wall of the smoke hood 1. The water-proof net 4 is used for blocking water drops, preventing water in the water film from being taken away by quick flue gas, and preventing too much water in the flue gas from entering the equipment connected to the rear end of the smoke hood 1. Wherein, the water-proof net 4 can be arranged between the aeration net bag 8 and the shunt tube 3, and can also be arranged above the shunt tube 3. When the water-proof net 4 is arranged above the shunt pipe 3, water flowing out of the water outlet of the shunt pipe 3 can pass through the water-proof net 4 and then enter the aeration net bag 8, and the water outlet of the shunt pipe 3 can also be arranged to directly pass through the structure of the water-proof net 4, so that the water directly reaches the aeration net bag 8 after flowing out of the water outlet of the shunt pipe 3.

In a preferred embodiment, the mounting plate 5 is fixed on the inner wall of the smoke hood 1, and the aeration string bag 8, the shunt tubes 3 and the water-proof net 4 can be fixed on the mounting plate 5 by means of screws, buckles and the like, so that the aeration string bag is convenient to detach and clean.

Preferably, the aeration net bag 8 and the shunt tubes 3 are fixed on the mounting plate 5, the waterproof net 4 is fixed on the aeration net bag 8, so that when the aeration net bag 8 and the waterproof net 4 are required to be replaced or cleaned, the aeration net bag 8 and the waterproof net 4 can be detached from the smoke hood 1 only by disassembling the connecting component 6 between the aeration net bag 8 and the mounting plate 5, and then the aeration net bag 8 and the waterproof net 4 are separated and cleaned, so that the disassembly and the assembly are more convenient.

Referring to fig. 7 and 8, preferably, the latch 7.1 is fixed on the frame of the aeration string bag 8, the elastic claw is fixed on the frame of the water-proof net 4, when the frame of the aeration string bag 8 is stuck together with the frame of the water-proof net 4, the latch 7.1 is inserted into the elastic claw, so that the two are fixed together, when the aeration string bag 8 and the water-proof net 4 are required to be separated, the latch 7.1 is forcibly pulled out from the elastic claw, and the aeration string bag 8 and the water-proof net 4 are more convenient to install through the structural design.

Referring to fig. 9 and 10, in a preferred embodiment, a connecting assembly 6 is disposed at the lower end of the mounting plate 5, and the aeration net bag 8 is fixed on the mounting plate 5 through the connecting assembly 6; the connecting component 6 comprises a rotating shaft 6.1 and a connecting sheet 6.2, the rotating shaft 6.1 is rotationally connected to the mounting plate 5, one end of the connecting sheet 6.2 is connected with the rotating shaft 6.1, and the other end is connected with the aeration net bag 8. Connecting piece 6.2 one end is rotated through pivot 6.1 and mounting panel 5 and is connected, before installation aeration string bag 8, rotates connecting piece 6.2 from the position of installation aeration string bag 8, after the aeration string bag 8 was placed corresponding position, rotates connecting piece 6.2 back to the position of installation aeration string bag 8, and then is connected with aeration string bag 8 for the installation is more convenient. The connection between the aeration net bag 8 and the connecting sheet 6.2 can be screw connection or the connection between the aeration net bag 8 and the connecting sheet 6.2 under the action of gravity.

Preferably, the connecting assembly 6 further comprises a spherical top ball 6.4, the spherical top ball 6.4 is of an existing structure, the spherical top ball 6.4 is fixed on the mounting plate 5, the connecting sheet 6.2 is provided with a clamping groove 6.3 matched with the spherical ball of the spherical top ball 6.4, and when the spherical ball of the spherical top ball 6.4 is placed in the clamping groove 6.3, external force needs to be applied to rotate the connecting sheet 6.2.

In order to facilitate the installation of the aeration net bag 8, a handle can be added on the frame of the aeration net bag 8, and the aeration net bag 8 can be taken by the handle.

Referring to fig. 4 and 5, in a preferred embodiment, the washing liquid tank 7 is a container for containing detergent, and needs to be added frequently, the detergent and cleaned, in order to facilitate the disassembly and assembly of the washing liquid tank 7, the washing liquid tank 7 is cylindrical, the latch 7.1 is fixed on the outer surface of the washing liquid tank 7, the mounting plate 5 is provided with a through hole 1.1 for inserting the washing liquid tank 7, the edge of the through hole 1.1 is provided with a groove 1.2 for the latch 7.1 to pass through, the washing liquid tank 7 is inserted into the through hole 1.1 and rotates the washing liquid tank 7, and the latch 7.1 is abutted against the top surface of the mounting plate 5. In this embodiment, for the dismouting of making things convenient for washing liquid case 7, set up washing liquid case 7 to cylindrically to set up latch 7.1 at its surface, set up through-hole 1.1 on mounting panel 5, washing liquid case 7 inserts in through-hole 1.1 from mounting panel 5 below and latch 7.1 passes behind recess 1.2, rotates washing liquid case 7, makes latch 7.1 and recess 1.2 dislocation, and latch 7.1 butt is at the top surface of mounting panel 5, realizes the quick installation of washing liquid case 7.

Preferably, the bottom surface of the washing liquid tank 7 is fixed with an abutting plate 7.3 for limiting the depth of the washing liquid tank 7 inserted into the through hole 1.1, and when the bottom surface of the abutting plate 7.3 abuts against the mounting plate 5, the washing liquid tank 7 is rotated, and at the moment, the latch 7.1 just abuts against the top surface of the mounting plate 5. In practical applications, in order to facilitate the taking and rotation of the washing liquid tank 7, a handle may be disposed on the bottom surface of the washing liquid tank 7.

Preferably, the top surface of the washing liquid tank 7 is provided with a liquid inlet 7.2 for adding the washing agent, and one end of the third pipeline 15 passes through the liquid inlet 7.2 and is arranged in the washing liquid tank 7. Wherein, the area of inlet 7.2 is less than the area of washing liquid case 7 top surface to inlet 7.2 is close to washing liquid case 7 top surface border setting, makes when taking washing liquid case 7, and washing liquid case 7 can exist a certain amount of slope, and inlet 7.2 keeps in washing liquid case 7 highest position when the slope, also can not lead to the detergent to flow out like this.

Referring to fig. 3, in a preferred embodiment, a detector 18 is also built inside the hood 1 above the water stop 17, and the detector 18 is electrically connected to the controller 12. The detector 18 is preferably a flame detector 18 and/or a temperature sensor for detecting whether a flame or temperature is too high in the hood 1, and when the flame or temperature is too high, the second control valve 11 is opened, and the water inlet of the second water inlet pipe 14 is used as fire-fighting water to avoid burning the internal structure. Specifically, because the second inlet tube 14 water inflow speed is fast, and the excessive back of the water yield in the aeration string bag 8, the negative pressure of flue gas can not overcome the gravity of water completely, consequently can drip from the aeration string bag 8, realizes putting out a fire.

Referring to fig. 1, the lower end of the hood 1 is provided with an inwardly bent skirt, and the water blocking plate 17 is placed on the skirt. The water stop 17 is preferably a water stop 17 as disclosed in chinese patent CN202021448529.7, which can receive water drops falling from a structure above the water stop 17 without affecting the passage of flue gas. Wherein, through the shirt rim setting of petticoat pipe 1 lower extreme, the water-stop sheet 17 is spread at petticoat pipe 1 lower extreme to both ends butt can realize its installation on this shirt rim, convenient and simple.

A control method of a smoke hood 1 type oil smoke purifier with a water film purifying function comprises the following steps:

A. the controller 12 receives the starting instruction, opens the second control valve 11 and starts the fan 2, and the second water inlet pipe 14 is used for feeding water into the aeration net bag 8, so that water forms a water film in the aeration net bag 8 rapidly, and timing is started.

B. After the set time t is reached, the second control valve 11 is closed, the first control valve 10 is opened, and the first water inlet pipe 13 is used for feeding water into the aeration net bag 8. The set time t can be obtained according to experimental data, and water is fed from the second water inlet pipe 14 and passes through the set time t, and then a water film with enough thickness is formed in the aeration net bag 8.

C. The controller 12 receives the real-time temperature value T1 of the detector 18, compares the real-time temperature value T1 with the set temperature value T, and determines whether T1> T, if yes, the controller 12 controls the second control valve 11 to open. This step is used for detecting whether the inside temperature of petticoat pipe 1 is too high and whether there is the flame, and when temperature T1> T, then judge that the temperature is too high and there is the flame, and then open second control valve 11 for fill water fast in the aeration string bag 8, increase water film thickness, and after water film thickness reaches certain thickness, because the too big drip of gravity is at water-stop 17, prevent that the flame from burning out the equipment of aeration string bag 8 rear end, play the fire control effect promptly.

In the above-mentioned control method, in step a, the third hydraulic pump 16 is simultaneously turned on when the second control valve 11 is turned on, and in step B, the third hydraulic pump 16 is turned off when the second control valve 11 is turned off, that is, the washing liquid is simultaneously performed with the rapid water intake, so that the washing liquid is sufficiently uniformly mixed in the water film.

In a preferred embodiment, after the controller 12 is provided with the timing times t2 and t3, the second control valve 11 and the third hydraulic pump 16 are closed, the timing starts, after the timing time t2 is reached, the second control valve 11 and the third hydraulic pump 16 are opened, and after the timing time t3 is reached, the second control valve 11 and the third hydraulic pump 16 are closed; this step is repeated. Since water and detergent are lost during the operation of the fume purifying device of the fume hood 1, the second control valve 11 needs to be opened and the third hydraulic pump 16 needs to be started at regular time to supplement water and washing liquid into the aeration net bag 8.

According to the invention, the aeration net bag 8 is fixed in the smoke hood 1, the first water inlet pipe 13 and the second water inlet pipe 14 are arranged above the aeration net bag 8, the first water inlet pipe 13 is connected with the first control valve 10 in series, the second water inlet pipe 14 is connected with the second control valve 11 in series, the water stop plate 17 is arranged at the lower end of the smoke hood 1, the water stop plate 17 is arranged under the aeration net bag 8, when the smoke hood is just started to be used, water is fed through the second water inlet pipe 14, so that a layer of water film is formed in the aeration net bag 8 rapidly, after the water film reaches a proper thickness, the water is fed through the first water inlet pipe 13, the water loss in the aeration net bag 8 is supplemented, the smoke hood can continuously work, the water film formed in the aeration net bag 8 can play a role in purifying smoke, and can also prevent flames from passing through, and the functions of heat insulation and fire prevention are achieved; and through the arrangement of the washing liquid tank 7, the third pipeline 15 and the third hydraulic pump 16, the detergent can be added into the water, so that substances such as dirt in the smoke are better dissolved in the water, and the purifying effect on the smoke is improved.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a petticoat pipe formula oil smoke purifier with water film purification performance, including petticoat pipe and fan, the fan sets up the air-out end at the petticoat pipe, its characterized in that, be fixed with aeration string bag, first inlet tube, second inlet tube and water proof net on the petticoat pipe inner wall, first inlet tube and second inlet tube one end are connected with the water source, the other end is arranged in aeration string bag and is put the top, first control valve has been concatenated on the first inlet tube, second control valve has been concatenated on the second inlet tube, first control valve and second control valve are fixed on the smoke mask, first inlet tube and second inlet tube one end are connected with the total inlet tube, first inlet tube and second inlet tube other end are connected with the shunt tubes, the shunt tubes is annular shunt tubes corresponds the border setting of aeration string bag to the shunt tubes, and the delivery port of shunt tubes evenly distributes around the aeration string bag, the water inlet of shunt tubes is arranged in the top of aeration string bag respectively with first inlet tube, the second inlet tube and third pipeline, the water proof net is arranged in the shunt tubes top of shunt tubes or is arranged in the baffle string bag and is put between the aeration string bag and the baffle tube, the baffle is fixed with the inner wall on the petticoat pipe, the baffle plate is fixed with the baffle plate, the baffle plate is fixed on the baffle plate has the baffle plate on the baffle plate, the baffle plate is fixed on the inner wall; the lower end of the smoke hood is provided with a water stop plate, the water stop plate is arranged under the aeration net bag, the second water inlet pipe is used for quickly feeding water and forming a water film on the aeration net bag, the lower end of the mounting plate is provided with a connecting component, and the aeration net bag is fixed on the mounting plate through the connecting component; the connecting assembly comprises a rotating shaft and a connecting sheet, wherein the rotating shaft is rotationally connected to the mounting plate, one end of the connecting sheet is connected with the rotating shaft, the other end of the connecting sheet is connected with the aeration net bag, the connecting assembly further comprises a spherical top bead, a clamping groove matched with the spherical ball of the spherical top bead is arranged on the connecting sheet, and the clamping groove is used for limiting the spherical top bead; the first water inlet pipe is used for compensating water loss of the water film, and the first control valve and the second control valve are electrically connected with a controller;

the detector is arranged inside the smoke hood and above the water stop plate, and is electrically connected with a controller, and is used for detecting the temperature inside the smoke hood and feeding back the temperature information to the controller;

after the set time t1 is reached, the second control valve is closed, the first control valve is opened, and the first water inlet pipe is filled with water and enters the aeration net bag.

2. The smoke hood type oil smoke purifying device with the water film purifying function according to claim 1, wherein a washing liquid box is further fixed on the smoke hood, a third pipeline is connected to the washing liquid box, the third pipeline is far away from the washing liquid box and arranged above the aeration net bag, a third hydraulic pump is connected in series in the middle of the third pipeline, the third hydraulic pump is fixed on the smoke hood, and the third hydraulic pump is electrically connected with the controller.

3. The smoke hood type oil smoke purifying device with a water film purifying function according to claim 2, wherein the washing liquid tank is cylindrical, the latch is fixed on the outer surface of the washing liquid tank, the mounting plate is provided with a through hole for inserting the washing liquid tank, a groove for the latch to pass through is formed on the edge of the through hole, the washing liquid tank is inserted into the through hole and rotates the washing liquid tank, and the latch is abutted to the top surface of the mounting plate.

4. A control method for controlling a hood type oil smoke purifying apparatus having a water film purifying function according to any one of claims 1 to 3, comprising the steps of:

after the set time t1 is reached, the second control valve is closed, the first control valve is opened, and the first water inlet pipe is filled with water and enters the aeration net bag;

5. The control method of a hood type oil smoke purifying apparatus having a water film purifying function according to claim 4, wherein the third hydraulic pump is simultaneously turned on when the second control valve is turned on;

when the second control valve is closed, the third hydraulic pump is closed.

6. The control method of hood type fume purifying apparatus with water film purifying function according to claim 5, wherein the controller is provided with timing times t2 and t3, after the second control valve and the third hydraulic pump are closed, the timing is started, after the timing time t2 is reached, the second control valve and the third hydraulic pump are opened, and after the timing time t3 is reached, the second control valve and the third hydraulic pump are closed; this step is repeated.