CN101995045B - Gas-liquid screen inverse mixed flow automatic cleaning range hood - Google Patents
Gas-liquid screen inverse mixed flow automatic cleaning range hood Download PDFInfo
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- CN101995045B CN101995045B CN 200910042013 CN200910042013A CN101995045B CN 101995045 B CN101995045 B CN 101995045B CN 200910042013 CN200910042013 CN 200910042013 CN 200910042013 A CN200910042013 A CN 200910042013A CN 101995045 B CN101995045 B CN 101995045B
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- cleaning
- service sink
- liquid
- filter
- smoke exhaust
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Abstract
The invention discloses a gas-liquid screen inverse mixed flow automatic cleaning range hood, which comprises a suspended hood, a filter screen box, a fan box, a filter plate positioned in the filter screen box, a fan set positioned in the fan box, and a cleaning device, wherein the cleaning device comprises a cleaning tank, and a liquid supply pipe and a return pipe which are connected with the cleaning tank, the upper end of the liquid supply pipe is connected with an liquid outlet pipe on which liquid spray holes are distributed, and the liquid outlet pipe is transversely arranged on the upper end of the filter plate; a return tank is arranged below the filter plate and is connected with a cleaning tank and a liquid supply pipe is connected with an immersed pump for conveying cleaning liquid; the filter plate is a plate body having a cambered surface and is formed by overlapping filter screens layer by layer; and the filter screen box is positioned above the air intake of the suspended hood, and the filter plate covers the air intake. The cleaning liquid, under the action of the immersed pump, flows to the filter plate and forms a thin and flowing cleaning liquid curtain, oil smoke below the opening of the suspended hood is sucked to the filter plate and a boiling gas and liquid mixture is formed by the combined cleaning liquid curtain and the meshes in the filter plate to clean the oil smoke in time.
Description
Technical field
The invention relates to a kind of smoke exhaust ventilator, but refer to that especially a kind of gas and liquid net are along the mixed flow Automatic-cleaning smoke exhaust ventilator.
Background technology
The structure of prior art smoke exhaust ventilator is large, and it mainly contains casing 1 ' extremely as shown in Figure 1, 2, blast pipe 2 ', and motor, the members such as fan and screen pack 3 ' or filter 4 ' form.During use, motor energising work drives fan and rotates, and forms negative pressuren zone in the casing 1 ', and the oil smoke of casing 1 ' outer screen pack 3 ' below is inhaled in the casing 1 ' via screen pack 3 ' or filter 4 ', discharged by blast pipe 2 ' again, to reach the purpose that pumps oil smoke.
But this smoke exhaust ventilator is long service time one, screen pack 3 ' or filter 4 ', and fan, motor usually can overwork the greasy dirt grease in the casing 1 ' inside exhaust pipe, and the anxiety in drippage oil pollution cooking stove and kitchen may be arranged; Even stopping up the mesh of screen pack 3 ' and web plate hole or the non-return valve of filter 4 ', air box outlet non-return valves etc. affect the smoke pumping effect of smoke exhaust ventilator, cause trouble to the user.
In the existing smoke exhaust ventilator cleaning technique, have to adopt and spray the fan blade mode, because ventilator filtering screen or filter are also usually stopped up by the greasy dirt grease, greasy dirt can directly spray on the cooking stove tool when start was cleaned; The mode that adopts the high-voltage electrode plate is also arranged, and the static that positive and negative electrode is formed at certain distance is inhaled tiny oil droplet that to be bonded at battery lead plate first-class under the effect of static, but service time one is long, still exist the greasy dirt grease to pile up after difficulty problem of clearing up etc.So both caused the trouble of cleaning to the user, and also provided direction for the producer makes great efforts to improve, this case produces thus.
Summary of the invention
The purpose of this invention is to provide the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of a kind of gas and liquid net, can realize self-cleaning oil cigarette screen pack, avoid the user voluntarily smoke exhaust ventilator to be cleaned and the trouble of clearing up.
For achieving the above object, solution of the present invention is:
The contrary mixed flow Automatic-cleaning smoke exhaust ventilator of a kind of gas and liquid net, it comprises a suspended hood, a filter screen case, an air box, the blower fan group that is arranged in the filter of filter screen case and is arranged in air box; Wherein: also comprise a cleaning device, cleaning device comprises service sink, connects feed pipe and the return duct of service sink, and the feed pipe upper end connects the drain pipe that is distributed with mouth spray, and this drain pipe is the upper end that crosses at filter; Be provided with backflash in addition below filter, this backflash is connected with service sink, and feed pipe connects the latent pump of transport cleaning liquid; This filter is the plate body of a camber line face, and its screen pack by one or more is formed by stacking; The filter screen case is the top, inlet scoop that is positioned at suspended hood, and filter is to block this inlet scoop.
Described suspended hood is the below that is positioned at whole smoke exhaust ventilator, and its middle part forms an inlet scoop, and this suspended hood is provided with various control buttons and lighting device.
Described filter screen case is a casing, it is located at suspended hood top and cover places on the inlet scoop, two filters arranged in a crossed manner are provided in a side of in the filter screen case and are positioned at the top, inlet scoop and it will block, the front inwall place of nearly bottom is provided with service sink in the filter screen case, filter screen chamber interior wall in relative service sink upper port position is formed with backflash in addition, this backflash is provided with certain gradient and can be back in the service sink with wherein liquid of order, and the lower end of two filters is the upper port that are placed in the backflash with service sink.
The top of described two filter infalls arranged in a crossed manner is horizontally set with a drain pipe suitable with the filter width, and this feed pipe lower end connects the pump of diving.
The top of described filter screen case connects the air box that communicates with the filter screen case.
Described air box is provided with exhaust outlet, is provided with the blower fan group in air box, and this blower fan group comprises motor, by motor-operated impeller, and cover places the ventilating duct on the impeller, this above-mentioned inlet scoop of ventilating duct one end UNICOM, other end UNICOM exhaust outlet.
The service sink below of described cleaning device is provided with sewage draining exit, and is controlled by switch; And this service sink is mended input pipe by being provided with cleaning fluid, and moisturizing input tube connector.
Described service sink is the independent separate body setting, and it is connected by corresponding pipeline with corresponding part.
Described air box and filter screen case are removable movable fit structure.
The inlet scoop of described suspended hood is located at the top, rear portion of suspended hood, and is blocked by the filter in the filter screen case of suspended hood top, and service sink is provided in a side of the suspended hood rear; This filter is the from back to front protruding plate body of arc of a middle part, above filter, be horizontally set with a drain pipe suitable with the filter width, be distributed with mouth spray on the drain pipe, be provided with backflash at the suspended hood rear surface in addition, the lower end of filter is to place this backflash, backflash is equipped with a vertical return duct, and this return duct downwards and service sink UNICOM.
Be provided with the ball-cock assembly of Automatic Positioning Control cleaning fluid liquid level in the described service sink.
Be provided with the temperature control automatic heating device in the described service sink.
Be provided with the automatic control footing of micro computer regularly blowdown apparatus or timing alarm suggestion device in the described service sink.
Being provided with liquid level in the described service sink crosses excessive in flow control device.
Be provided with manual water replanishing device, manual blowdown device or manual additional clean agent device in the described service sink.
Be provided with automatic water-replenishing device, automatic sewage discharging device in the described service sink or automatically replenish detergent device.
Described each automaton is provided with sound prompt device or the automatic glittering suggestion device of light that rings of reporting that automatic newspaper rings.
Can be provided with in the described service sink micro computer automatically the control pump of diving intermittently regularly rise and stop circulation running device.
After adopting such scheme, the present invention is provided with filter above the inlet scoop of suspended hood, and the filter top is provided with the drain pipe with a plurality of mouth sprays, cleaning fluid is under the effect of the pump of diving, flow out to the filter upper end from the mouth spray of drain pipe, a kind ofly on filter naturally flow down the very thin mobile combined cleaning fluid curtain that produces by the upper end, in use, blower fan work, form negative pressuren zone in the casing, oil smoke under the outer fume-exhausting fan housing mouth of casing is drawn on the filter, by the mesh of combined cleaning fluid curtain and filter; Produce simultaneously gas and the liquid mixture that rolls, in time oil smoke is washed down; Both realize pumping the purpose of oil smoke, reached again the purpose of the folded screen pack of automatic cleaning multilayer, avoided the trouble of the many cleanings of user.
Description of drawings
Fig. 1 is the schematic diagram of commonly using smoke exhaust ventilator;
Fig. 2 commonly uses the schematic diagram of smoke exhaust ventilator for another;
Fig. 3 is the schematic perspective view of the embodiment of the invention 1;
Fig. 4 is the partial schematic sectional view 1 of the embodiment of the invention 1;
Fig. 5 is the partial schematic sectional view 2 of the embodiment of the invention 1;
Fig. 5-1 is the partial enlarged drawing of Fig. 5;
Fig. 5-1-1 is the top partial enlarged drawing of Fig. 5-1;
Fig. 5-1-2 is the bottom partial enlarged drawing of Fig. 5-1;
Fig. 5-2 for the A-A of Fig. 5 to analysing and observe partial enlarged drawing;
Fig. 5-2-1 is the partial enlarged drawing of Fig. 5-2;
Fig. 6 is the schematic perspective view of the embodiment of the invention 2;
Fig. 7 is the partial schematic sectional view of the embodiment of the invention 2;
Fig. 8 is the decomposing schematic representation of the embodiment of the invention 3;
Fig. 9 is the decomposing schematic representation of the embodiment of the invention 4;
Figure 10 is the partial schematic sectional view of the embodiment of the invention 4;
Figure 11 is the partial schematic sectional view of the embodiment of the invention 5;
Figure 11-1 for the B-B of Figure 11 to analysing and observe partial enlarged drawing.
The specific embodiment
Be the embodiment 1 of the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of gas of the present invention and liquid net such as Fig. 3 to Fig. 5-2-1: comprise a suspended hood 1, a filter screen case 2, an air box 3, the filter 4 that is arranged in filter screen case 2, the blower fan group 5 that is arranged in air box 3 and cleaning device 6.
Suspended hood 1 is the below that is positioned at whole smoke exhaust ventilator, and its middle part forms an inlet scoop 12, is inhaled in the smoke exhaust ventilator with the oil smoke that makes the kitchen range top, and this suspended hood is provided with various control buttons 11 and lighting device (not shown).
When smoke exhaust ventilator normally uses, open starting switch and get final product work.
And need to carry out cleaning to smoke exhaust ventilator the time, in service sink 65, place the finite concentration cleaning fluid, open the switch of cleaning device 6, starting the pump 66 of diving starts working, cleaning fluid is under the effect of the pump 66 of diving, cleaning fluid in the service sink 65 is through the pump 66 of diving, be conveyed into drain pipe 61 by feed pipe 64, the cleaning fluid that is penetrated by mouth spray 61 jet flows is again divided equally nature and is flow to two filters, 4 upper ends, two filters 4 that formed by the folded screen pack of multilayer are made as the camber line face, being beneficial to cleaning fluid does not drip, and can reach at a slow speed natural flow in screen pack of cleaning fluid, under the effect of own wt, by the upper naturally trickling downwards along filter 4 upper ends, owing to forming the effect of the screen pack of filter 4, cleaning fluid can form surface tension on each mesh, and cleaning fluid can form very thin and admires curtain along the plate mobile cleaning fluid that faces down at filter 4, and wanders on the backflash 62, flow back in the service sink 65 by cleaning fluid backflash 62 again, form the circulating path of a cleaning fluid with this; Motor 51 energising work when air box 3 apoplexy units 5, it drives fan blade 52 and rotates, make filter screen case 2, air box 3 interior formation negative pressuren zones, the oil smoke of outer and suspended hood 1 below of smoke exhaust ventilator is by 12 strum boxs 2 and air box 3 from the inlet scoop, when passing mesh that the folded screen pack of multilayer consists of filter 4 with combined mobile cleaning fluid curtain, mixed by contrary the friction soot gas, injected formation gas and liquid mixture, or soot gas is cleaned the slight bubble moment bag cage of liquid generation formation with shattered to pieces, soot gas is cleaned in mixed flow by fully adverse current mixing; With it simultaneously, the inside of filter screen case 2, air box 3 interior formation negative pressuren zones produces mobile gas and the liquid that rolls, cleaning fluid together converges and is back to backflash 62 to service sink 65, soot gas is cleaned by fully contrary mixed flow again, and so forth circulation, soot gas are again by fully suitable mixed flow cleaning.Therefore, range hood structure of the present invention makes and takes out, inside and outside the fuselage in the suction, mist extractor ventilating duct flow process, no longer include the greasy dirt grease and pile up; Make it to reach gas and liquid cleaning reaction process that the contrary mixed flow of soot gas and cleaning fluid forms.So both realized pumping the purpose of oil smoke, and reached again the purpose of the folded screen pack of automatic cleaning multilayer, the folded screen pack of multilayer can be pulled down cleaning, stops up without the greasy dirt grease; The gas of discharging is without secondary pollution environment such as greasy dirt oil smoke, and the gas of backflow also is that cleaning is clean, so that the internal and external environments such as kitchen and people no longer suffer the worry of fume pollution, avoids the trouble of the many cleanings of user.
Cooperate shown in Figure 4ly, can be provided with the automatic control of sewage disposal device of infrared observation in the service sink 65 of this cleaning device 6, dirty efficient to guarantee the wash oil tobacco tar, cleaning control is at best clean conditions; Also be provided with microcomputer automatic control device on this service sink 65 to add up to regularly blowdown apparatus or timing alarm prompting blowdown apparatus, dirty efficient to guarantee the wash oil tobacco tar, cleaning control is at best clean conditions; This microcomputer automatic control device is controlled latent pump start by set date at 66 intermittence and is stopped simultaneously, folds screen pack oil smoke greasy dirt to guarantee the batch cleaning multilayer, makes the little resistance of air-flow by combined cleaning fluid curtain, and cleaning control is at best clean conditions; But further be provided with the liquid level of a ball-cock assembly 651 Automatic Positioning Control cleaning fluids in the service sink 65, guaranteeing the sufficient quantity of cleaning fluid, and guarantee timely cleaning function; Also design a liquid level in this service sink 65 and cross and overflow from flow control device, with the floating greasy dirt of guaranteeing to be produced when the wash oil tobacco tar is dirty, the discharge dirt that can automatically flow automatically makes it in time to keep cleaning cleannes, and can prevent that cleaning fluid at service sink mouth overflow out; In addition, can design the temperature control automatic heating device in the service sink 65, make things convenient for heated wash, when using in order to the zones of different Various Seasonal, can both reach this cleaning of ability of high-efficiency washing.Moreover, also be provided with in this cleaning device 6 and automatically replenish the cleaning agent control device, to guarantee the cleaning concentration of cleaning fluid in running, make it to reach the reaction of quick appearance solution greasy dirt, oil smoke; This automaton is the glittering suggestion device of light modulation of automatically newspaper sound or automatically reports the sound prompt device that rings, can both give full play to its normal operation to guarantee every control device.Also can be provided with the convenient aperture mirror of observing the cleaning fluid cleannes on the side of this service sink 65.
The embodiment 2 of the smoke exhaust ventilator that the contrary mixed flow of the gas of the present invention shown in Fig. 6,7 and liquid net cleans automatically: it comprises a suspended hood 1, a filter screen case 2, an air box 3, the filter 4 that is arranged in the filter screen case, the blower fan group 5 that is arranged in air box 3 and cleaning device 6 equally.
Itself and embodiment 1 same structure are not repeated herein; Difference is the service sink 65 of cleaning device 6, and backflash 62 is provided in a side of on the inwall of filter screen case 2 lower ends, is connected with service sink 65 by return duct 63, can realize equally the function of Automatic-cleaning smoke exhaust ventilator.
Be illustrated in figure 8 as the embodiment 3 of the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of gas of the present invention and liquid net, what they were different from above-described embodiment 1 is that filter screen case 2 and air box 3 are made as movable removable structure, and cleaning device 6 is set to the independent separate body structure, and each part connects by corresponding pipeline.
Fig. 9,10 is depicted as the embodiment 4 of gas of the present invention and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net for another example, what they were different from above-described embodiment 1 is that air box 3 is made as independently Split type structure, connect with filter screen case 2 by pipeline, so can make smoke exhaust ventilator have a selection of installing flexibly.
Be depicted as the embodiment 5 of gas of the present invention and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net such as Figure 11,11-1, it is the top, rear portion that the inlet scoop 12 of suspended hood 1 is located at suspended hood, and blocked by the filter 4 in the filter screen case 2 of suspended hood 1 top, service sink 6 is provided in a side of suspended hood 1 rear; This filter 4 is the from back to front protruding plate body of arc of a middle part, above filter 4, be horizontally set with a drain pipe 61 suitable with filter 4 width, be distributed with mouth spray 611 on the drain pipe 61, be provided with backflash 62 at suspended hood 1 rear surface in addition, the lower end of filter 4 is to place this backflash 62, backflash 62 is equipped with a vertical return duct 63, these return duct 63 downward and service sink 65 UNICOMs; Other have a feed pipe 64 self-cleaning ponds 65 pass straight up filter 4 and with drain pipe 61 UNICOMs, this feed pipe 64 lower ends connect the pump 66 of diving, in order to cleaning fluid is delivered in the drain pipe 61.The same function that realizes Automatic-cleaning smoke exhaust ventilator.
Claims (14)
1. the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of a gas and liquid net, it comprises a suspended hood, a filter screen case, an air box, the blower fan group that is arranged in the filter of filter screen case and is arranged in air box; It is characterized in that: also comprise a cleaning device, cleaning device comprises service sink, connects feed pipe and the return duct of service sink, and the feed pipe upper end connects the drain pipe that is distributed with mouth spray, and this drain pipe is the upper end that crosses at filter; Be provided with backflash in addition below filter, this backflash is connected with service sink, and feed pipe connects the latent pump of transport cleaning liquid; This filter is the plate body of a camber line face, and it is formed by stacking by one or more layers of screen pack; The filter screen case is the top, inlet scoop that is positioned at suspended hood, and filter is to block this inlet scoop; The filter screen case is a casing, it is located at suspended hood top and cover places on the inlet scoop, two filters arranged in a crossed manner are provided in a side of in the filter screen case and are positioned at the top, inlet scoop and the inlet scoop is blocked, the front inwall place of nearly bottom is provided with service sink in the filter screen case, filter screen chamber interior wall in relative service sink upper port position is formed with backflash in addition, this backflash is provided with certain gradient and can be back in the service sink with order liquid wherein, and the lower end of two filters is the upper port places that are placed on backflash and service sink; The top of two filter infalls arranged in a crossed manner is horizontally set with a drain pipe suitable with the filter width, and this feed pipe lower end connects the pump of diving.
2. gas as claimed in claim 1 and liquid net are against the mixed flow Automatic-cleaning smoke exhaust ventilator, and it is characterized in that: suspended hood is the below that is positioned at whole smoke exhaust ventilator, and its middle part forms an inlet scoop, and this suspended hood is provided with various control buttons and lighting device.
3. the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of gas as claimed in claim 1 and liquid net is characterized in that: the air box that the top connection of filter screen case communicates with the filter screen case.
4. gas as claimed in claim 3 and liquid net are against the mixed flow Automatic-cleaning smoke exhaust ventilator, it is characterized in that: air box is provided with exhaust outlet, in air box, be provided with the blower fan group, this blower fan group comprises motor, by motor-operated impeller, and cover places the ventilating duct on the impeller, this above-mentioned inlet scoop of ventilating duct one end UNICOM, other end UNICOM exhaust outlet.
5. the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of gas as claimed in claim 1 and liquid net is characterized in that: be provided with sewage draining exit below the service sink of cleaning device, and controlled by switch; And this service sink is provided with cleaning fluid benefit input pipe, and moisturizing input tube connector.
6. gas as claimed in claim 1 and liquid net are against the mixed flow Automatic-cleaning smoke exhaust ventilator, and it is characterized in that: service sink is the independent separate body setting, and it is connected by corresponding pipeline with corresponding part.
7. gas as claimed in claim 1 and liquid net are against the mixed flow Automatic-cleaning smoke exhaust ventilator, and it is characterized in that: air box and filter screen case are removable movable fit structure.
8. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: the ball-cock assembly that is provided with Automatic Positioning Control cleaning fluid liquid level in the service sink.
9. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: be provided with the temperature control automatic heating device in the service sink.
10. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: be provided with the automatic control footing of micro computer regularly blowdown apparatus or timing alarm suggestion device in the service sink.
11. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: be provided with liquid level in the service sink and cross excessive in flow control device.
12. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: be provided with manual water replanishing device, manual blowdown device or manual additional clean agent device in the service sink.
13. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: be provided with automatic water-replenishing device, automatic sewage discharging device in the service sink or automatically replenish detergent device.
14. such as claim 1 or 6 described gas and the contrary mixed flow Automatic-cleaning smoke exhaust ventilator of liquid net, it is characterized in that: can be provided with in the service sink micro computer automatically the control pump of diving intermittently regularly rise and stop circulation running device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910042013 CN101995045B (en) | 2009-08-20 | 2009-08-20 | Gas-liquid screen inverse mixed flow automatic cleaning range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910042013 CN101995045B (en) | 2009-08-20 | 2009-08-20 | Gas-liquid screen inverse mixed flow automatic cleaning range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101995045A CN101995045A (en) | 2011-03-30 |
| CN101995045B true CN101995045B (en) | 2013-01-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910042013 Expired - Fee Related CN101995045B (en) | 2009-08-20 | 2009-08-20 | Gas-liquid screen inverse mixed flow automatic cleaning range hood |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331274B (en) * | 2013-07-19 | 2016-04-06 | 珠海紫翔电子科技有限公司 | Press wash machine |
| CN103697521B (en) * | 2013-12-16 | 2016-09-07 | 刘恩华 | Self cleaning hood |
| CN104848281A (en) * | 2015-06-01 | 2015-08-19 | 李梅香 | Cooking fume purification system |
| CN107781872A (en) * | 2016-08-26 | 2018-03-09 | 华帝股份有限公司 | Range hood and automatic cleaning device thereof |
| CN107062320A (en) * | 2016-12-09 | 2017-08-18 | 成都前锋电子有限责任公司 | A kind of inside L-type range hood capable of washing |
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| US6182653B1 (en) * | 1999-03-01 | 2001-02-06 | Randell Manufacturing, Inc. | Exhaust hood |
| CN2513034Y (en) * | 2001-12-07 | 2002-09-25 | 郑立东 | Fume purifier |
| CN2615538Y (en) * | 2003-04-18 | 2004-05-12 | 成都市瑞发通讯器材有限公司 | Vertical kitchen ventilator |
| CN2637948Y (en) * | 2003-01-27 | 2004-09-01 | 黎泽盛 | Kitchen oil-fume purifier |
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| CN201497050U (en) * | 2009-08-20 | 2010-06-02 | 刘恩华 | Self cleaning smoke exhauster with composite gas-liquid screen-inverse flow |
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|---|---|---|---|---|
| CN2231385Y (en) * | 1995-08-02 | 1996-07-17 | 李毅强 | Dust-collecting cleaning fume exhauster |
| US6182653B1 (en) * | 1999-03-01 | 2001-02-06 | Randell Manufacturing, Inc. | Exhaust hood |
| CN2375895Y (en) * | 1999-05-26 | 2000-04-26 | 刘恩华 | Cooking fume remover capable of automatic cleaning |
| CN2513034Y (en) * | 2001-12-07 | 2002-09-25 | 郑立东 | Fume purifier |
| CN2637948Y (en) * | 2003-01-27 | 2004-09-01 | 黎泽盛 | Kitchen oil-fume purifier |
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