CN1152690A

CN1152690A - Detached kitchen fume exhauster

Info

Publication number: CN1152690A
Application number: CN 95117863
Authority: CN
Inventors: 汤健中
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-12-21
Filing date: 1995-12-21
Publication date: 1997-06-25

Abstract

The present invention belongs to the field of kitchen utensils. Said invented kitchen ventilator is characterized by that 1. Because of adoption of up-down or plate-rotated valve cover opening and closing device it can make the combined ventilator more miniaturization, so that under the condition of that said kitchen ventilator does not affect stir-frying its installation height can be further lowered, smoke-sucking distance can be further shortened so as to attain the goal of raising smoke-sucking efficiency; 2. an inclined oil-gide plate mechanism is placed on the smoke-sucking hole in the kitchen ventilator, so that it can prevent the tar drop containing blastomogen from directly falling into frying pan so as to protect food against contamination.

Description

Separating kitchen ventilator

The invention belongs to kitchen utensils.

Technical background: the prior art integral kitchen ventilator of selling on the market is because blower fan is to be contained in one with smoking cover, 2 typhoon machines are housed in the cover, thereby volume is big, hung low and certainly will block the cooking sight line, therefore, can only high hang up, so that come large tracts of land diffusion on the oil smoke, 1 cubic metre dense oil smoke has diffused into the thin oil cigarette of 2-3 cubic meter, and the power of polyvoltine more than 1 times could be taken out oil smoke totally at least.Smoking efficient is generally very low, and its key is that the smoking cover volume is big, the high hang-up of having to, and as everybody knows, the draft of smoke exhaust ventilator is to be inversely proportional to distance, and distance is higher, and draft is littler, and the smoking effect is poorer, for improving the smoking efficient of smoke exhaust ventilator.

The inventor has applied for " wall-type maltifunction ois soot extractor " utility model patent (patent No.: 91224893.9) on September 17th, 91 to Patent Office of the People's Republic of China, it is characterized in that blower fan separates with smoking cover is not contained in one, blower fan is adorned outdoor separately, advantage is the kitchen noiselessness, have a kitchen cabinet on the smoking cover, smoke pumping below it, work as kitchen cabinet above, a machine dual-purpose is not because smoking cover itself contains blower fan, so volume is little, under the condition of not keeping off the cooking sight line, its setting height(from bottom) is low, thereby distance is near, draft is big, smoking efficient height.Shortcoming is: it is to be combined by two single hole smoking covers, and volume is gathered around swollen not compact, and globality is ornamental poor, production cost height (Fig. 1).For this reason, the inventor has applied for " wall dual-hole oil soot extractor " utility model patent that process has been improved on April 3rd, 92 to Patent Office of the People's Republic of China again, it is characterized in that two single hole smoking covers are merged into single diplopore smoking cover (Fig. 2) And respectively loads onto a valve opening and closing device (Fig. 3) on two smoking ports, can use by a cooking stove both to satisfy, also can two requirements that cooking stove uses simultaneously, advantage is a volume compact, good integrity, production cost is low.But also have following 2 weak points: (1) is not though contained blower fan in the diplopore smoking cover cover, the smoking cover volume can dwindle relatively, but the dwindling of volume also is subjected to the smoking port valve opening and closing device takies the excessive restriction of volume, so that the smoking cover size can't further be dwindled, and its setting height(from bottom) also just can not further reduce.Therefore, fail to reach best smoking effect; (2) valve cover plate bottom surface when opening of valve opening and closing device is a lonely face recessed in the middle of being on the smoking port, condensing upon tar under the valve cover plate drips the lowest part that is pooled to recessed lonely face soon and falls into frying pan, the alternative valve cover plate is an one flat plate, owing to be in level when opening, condensing upon tar under the cover plate bottom surface drips because be in Monday horizontal plane upper reaches not walk, when arriving to a certain degree, promptly when himself gravity during greater than adhesive force, tar drips also can directly fall into frying pan under valve cover plate bottom surface, these tar drip and contain carcinogen, and are very harmful to health.

The objective of the invention is to propose a kind of split type smoking cover size is further dwindled, thereby can further reduce the smoking cover setting height(from bottom), shorten the smoking distance, avoid tar to drip the separating kitchen ventilator that directly falls into the frying pan contaminated food with further raising smoking efficient ， And.

Purpose of the present invention can reach by following measure: adopt a kind of volume that takes up room little on the smoking port in the split type smoking cover of enclosed shape, can further dwindle the smoking cover size and not fall into rotating plate type valve cover plate open-close device in the frying pan to improve smoking efficient And and tar is dripped to flow away along the inclined-plane, it is made up of flap mechanism and oil guide plate mechanism: (1) flap mechanism is provided with a turning cylinder, have a valve cover plate that rotates with turning cylinder on the turning cylinder, on the base plate of the smoking cover smoking port of turning cylinder lower end, be provided with an axle bed, turning cylinder upper end pass the smoking cover top board above be provided with swing handle, valve opening limiting plate when also being provided with the valve cover plate reaching on smoking cover smoking port base plate, the valve cover plate when the valve cover plate is closed are closed the guide rail that does not drop when limiting plate and maintaining valve door cover plate rotate.Turning cylinder divides the vertical rotation axle, with two kinds of mounting means of inclination turning cylinder, a valve cover plate that horizontally rotates is housed on the vertical rotation axle, the smoking port end face of Pei Heing is also made the horizontal plane with it, valve cover plate with smoking cover ramped bottom surface parallel rotation is housed on the inclination turning cylinder, the end face of its smoking port is made the plane that parallels with the smoking cover ramped bottom surface, also can prevent the brake that the valve cover plate moves in case of necessity on vertical rotation axle or the inclination turning cylinder with a cover, (2) there are two kinds of forms in oil guide plate mechanism: (A) be fixed on the smoking port top, the tilting oil guide plate under the smoking cover end face; (B) enclosed shape smoking cover end face is made the end face that band tilts, the angle of inclination is a principle so that oil droplet is flowed away.

Based on same inventive concept, the present invention proposes second independent technique solution simultaneously: adopt a kind of volume that takes up room little on the smoking port in the split type smoking cover of enclosed shape, can further dwindle the smoking cover size, tar is dripped to flow away along oil guide plate mechanism inclined plane and do not fall into lift valve cover plate open-close device in the frying pan to improve smoking efficient And, it is made up of elevating mechanism and oil guide plate mechanism: (1) elevating mechanism has following 5 kinds of patterns: (A) spiral arm type, (B) electromagnetism swage; (C) boatswain chair type; (D) elevator type and (E) straight rod type; (2) oil guide plate mechanism is made of valve cover plate and eccentric the support, eccentric support to be contained in be positioned on the eccentric position of valve cover plate one side below the smoking cover top board, or directly be contained on the eccentric position of a side on the valve cover plate, also can utilize eccentric support of support of bearing double as of elevating mechanism, when the valve cover plate is promoted to the smoking cover top by elevating mechanism, effect by the off-centre support, make valve cover plate and smoking cover horizontal top surface constitute the oil guide plate inclined-plane of a stream oil, thereby oil droplet is flowed away along the oil guide plate inclined-plane, flow into oil collection box through the bottom oil groove, and directly do not fall into frying pan from valve cover plate bottom surface, the angle of inclination on this inclined-plane is a principle can allow oil droplet flow away, and elevating mechanism also has a cover can prevent the brake that the valve cover plate falls after rise.

Purpose of the present invention also can realize by following additional technical characterictic:

(1) said elevating mechanism is a kind of spiral arm type elevating mechanism in the above-mentioned lift valve cover plate open-close device: rotary arm shaft is supported on the support of bearing in the smoking cover, the one end stretches out a spiral arm that becomes an angle of 90 degrees with rotary arm shaft, the spiral arm end is made living of can freely swinging with the valve cover plate and is connected, the outside of passing the smoking cover panel at the other end of rotary arm shaft is provided with crank, prevent that the brake that the valve cover plate falls after rise just is contained on the rotary arm shaft, in order to reduce the frictional resistance on the brake, also can be on spiral arm an end relative with the valve cover plate, add one group of counterweight.

(2) said valve elevating mechanism is a kind of electromagnetism swage elevating mechanism in the above-mentioned lift valve cover plate open-close device: lever arm is supported on the smoking cover inner bearing support, the one edge tail is made living of can freely swinging with the valve cover plate and is connected, in the other end chute of lever arm or between the support of bearing and valve cover plate, partly turn up electromagnet traction pin in the lever arm chute near the support of bearing, during energising, the valve cover plate is opened, during outage, the valve cover plate is closed, on electromagnet energising circuit, also can add a timing automatic timer or an automatic timeing closing device of computer of closing solenoid circuit, in order to reduce the electromagnet power demand, also can on lever, add a counterweight or balancing spring.Itself just be equivalent to a brake that can prevent that the valve cover plate from falling after rise during the electromagnet energising.

(3) said elevating mechanism is a kind of boatswain chair type elevating mechanism in the above-mentioned lift valve cover plate open-close device, one end of its lifting rope is connected with the valve cover plate, the other end passes the aperture of smoking cover panel by a lifting rope ring or pulley, hook is suspended on the hanging column on the panel, also can be connected in series a tension extension spring on the lifting rope, also be provided with the valve cover plate that faces toward the smoking port center when maintaining valve door cover plate falls and close limiting plate on the base plate of smoking port, lifting rope can adopt wire or thin chain or fire-retardant rope.

(4) said elevating mechanism is a kind of elevator type elevating mechanism in the above-mentioned lift valve cover plate open-close device, the elevator axle is supported on the support of bearing in the smoking cover, be wound with lifting rope on the axle, lifting rope one end connects the valve cover plate, the outside that the elevator axle passes the smoking cover panel is provided with crank, the brake that prevents that the valve cover plate from falling after rise is housed on the elevator axle, also be provided with the cover plate that faces toward the smoking port center when maintaining valve door cover plate falls and close limiting plate on the base plate of smoking port, lifting rope can adopt wire or thin chain of metal or fire-retardant rope.

(5) said elevating mechanism is a kind of straight rod type elevating mechanism in the above-mentioned lift valve cover plate open-close device: partly be provided with a non-return pin at the lifting straight-bar near the lower end, lifting straight-bar lower end adopts living of can freely swinging to be connected with the valve cover plate, pass smoking cover top board place at the lifting straight-bar hole, a notched garden is arranged, this breach only allows the non-return pin to passing through on time, after the valve cover plate rises to the top, just turn to another direction partially and can not fall after rise, this non-return pin and hole, notched garden constitute the brake that prevents that the valve cover plate from falling after rise.

(6) above-mentionedly prevent that the valve cover plate from moving or the brake that falls after rise has three kinds of structures: (1) by packing ring, spring and locking nut or the friction brakes of being made up of the locking nut that double nut constitutes, spring are twisted tightlyer, and frictional force is bigger; (2) by the steel ball location-plate, steel ball, spring compression screw crank bumps funicle, and set bolt bumps the pearl shell, the pearl formula of the bumping brake that pin and turning cylinder are formed; (3) automatic load sustaining brake of forming by click.

The feature of separating kitchen ventilator also is:

(1) the side-looking cross section of split type smoking cover is that an inequilateral is trapezoidal, the back side is vertically by wall, end face is a horizontal plane, or for being with a bit sweptback plane slightly, the trapezoidal inclined-plane of inequilateral towards declivity to frying pan, 2 smoking ports about having on the inclined-plane, be embedded with an illuminating lamp shade by upper part in the middle of the inclined-plane, oil collection box is positioned at the bottom of inclined-plane one side, spend to oil collection box lopsidedness 0～5 during installation, in order to stream oil, pipe is positioned at the centre at smoking cover top, has up and down several hanging holes of hanging on the cooking stove wall on the link plate, can adjust gradient to oil collection box one effluent oil by several hanging holes up and down.

(2) in order to protect pernicious gas watch-dog and culinary art steamed rice timing signal device not to be subjected to oil smoke temperature and greasy the influence, also be provided with an insulation blocking plate or protection box in the smoking cover.

There is closely-related technical characterictic to be with the present invention in the prior art: a kind of separating kitchen ventilator, by blower fan, fan supporter, pipeline, split type smoking cover, kitchen cabinet, oil collection box, illuminating lamp, electric switch, the pernicious gas watch-dog, culinary art steamed rice timing signal device, compositions such as valve opening and closing device: its split type smoking cover is one to be separated with blower fan, becomes the split type smoking cover of enclosed shape of a monomer separately, be provided with 1～2 smoking port and 1～2 corresponding valve opening and closing device in the cover: under the inclined-plane at smoking cover smoking port place, also can have in case of necessity a heat dissipating housing, this heat dissipating housing be one can allow ambient cold air along the smoking port inclined-plane air blanketing of heat loss through convection from bottom to up; Blower fan adopts single speed blower fan or the adjustable double speed blower fan of air quantity; Blower fan is adorned outdoor separately, also can be added with a rain cover, is connected with split type smoking cover in the kitchen by pipeline, and this blower fan also can be installed in away from by the public chimney in the kitchen of cooking stove.

The present invention compares the advantage that is had with the prior art wall dual-hole oil soot extractor:

(1) owing to adopted littler lift of the area that takes up room or rotating plate type valve opening and closing device, make the miniaturization that more becomes of split type smoking cover, can further reduce the setting height(from bottom) of smoking cover, shorten the smoking distance, thereby reach the purpose of further raising smoking efficient.

(2) because the valve cover plate itself has the Oil Guide effect of inclination, or owing to be provided with tilting oil guide plate device above smoking port, the tar of having avoided containing carcinogen drips the food pollution harm that directly falls into frying pan and caused.

The drawing explanation:

Fig. 1 is wall-type maltifunction ois soot extractor figure.

Fig. 2 blocks the double-hole wall type smoke extractor figure of bar for band.

Fig. 3 is the valve opening and closing device figure of wall dual-hole oil soot extractor.

Fig. 4, Fig. 5 are spiral arm A type lift valve cover plate open-close device figure, and Fig. 4 is the side view of Fig. 5.Its spiral arm crank is located at the side.

Fig. 6, Fig. 7 are spiral arm Type B lift valve cover plate open-close device figure, and its spiral arm crank is located at the front.

Fig. 8 is electromagnet A type lift valve cover plate open-close device figure.

Fig. 9 is electromagnet Type B lift valve cover plate open-close device figure.

Figure 10 is boatswain chair type lift valve cover plate open-close device figure.

Figure 11 is elevator type lift valve cover plate open-close device figure.

Figure 12 is straight rod type lift valve cover plate open-close device figure.

Figure 13 is for bumping pearl formula brake figure.

Figure 14, Figure 15 are vertical rotation axle rotating plate type valve cover plate open-close device figure, and Figure 15 is the A-A vertical view of Figure 14.

Figure 16 is brace turning cylinder rotating plate type valve cover plate open-close device figure.

Figure 17 is the insulation blocking plate figure of pernicious gas watch-dog and culinary art steamed rice timing signal device.

Figure 19 is the protection box figure of pernicious gas watch-dog and culinary art steamed rice timing signal device.

Figure 19 is the eccentric figure of support.

Figure 20, Figure 21 are split type smoking cover figure, and Figure 21 is the side view of Figure 20.

Embodiments of the invention are as follows:

(1) Fig. 4, Fig. 5 is contained in the spiral arm A type lift valve cover plate open-close device embodiment of side for crank: it is by crank (1), pin (2), spring (3), packing ring (4), locking nut (5), rotary arm shaft (6), the support of bearing (7), spiral arm (8), active connecting base (9), eccentric support (10), valve cover plate (11) is formed.Packing ring (4), spring (3) and locking nut (5) are formed friction brakes.

(2) Fig. 6, Fig. 7 is the positive spiral arm Type B lift valve cover plate open-close device embodiment of crank dress, it supports (15), valve cover plate (16), spiral arm (17) by off-centre, the support of bearing (18), locking nut (19), packing ring (20), spring (21), pin (22), crank (23) and rotary arm shaft (24) are formed.

(3) Fig. 8 is electromagnet A type lift valve opening and closing device embodiment: it is by counterweight (26), and electromagnet traction pin (27) is inserted in the chute of lever (30), the support of bearing (28), eccentric (29) and valve cover plate (31) composition of supporting.

(4) Fig. 9 is electromagnet Type B lift valve opening and closing device embodiment: it is by the support of bearing (35), and electromagnet traction pin (36) is inserted in the chute of lever (39), balancing spring (37), eccentric (38) and valve cover plate (40) composition of supporting.

(5) Figure 10 is boatswain chair type lift valve opening and closing device embodiment: it is by hanging column (60), hook (61), lifting rope (62), eccentric support (63), lifting rope ring (64), valve cover plate (65) and valve cover plate limiting plate (66) and back-moving spring (67) composition.

(6) Figure 11 is elevator type lift valve cover plate open-close device embodiment: it is by pin (70), crank (71), packing ring (72), spring (73), locking nut (74), elevator axle (75), the support of bearing (76), eccentric support (77), valve cover plate limiting plate (78), lifting rope (79) and valve cover plate (80) are formed.

(7) Figure 12 is straight rod type lift valve cover plate open-close device embodiment: it is by the hole, garden (85) that has breach, and off-centre supports (86), non-return pin (87), and valve cover plate limiting plate (88), valve cover plate (89) and lifting straight-bar (90) are formed.

(8) Figure 13 is for bumping pearl formula brake embodiment: it is by crank (95), set bolt (96), location orifice plate (97), bump funicle (98), steel ball (99), spring (100), bump pearl shell (101), turning cylinder (102), pin and pin-and-hole (103) are formed, bumping funicle is enclosed within on the turning cylinder with slot, rotate with turning cylinder, tighten the screw on crank and the turning cylinder, can make steel ball be close to location orifice plate (97) and go up mobile, also can at location orifice plate (97) and bump to fill up between the funicle (98) and go up thin slice, with the size of levelling brake force.Can open the pin-and-hole (103) of several different angles on the turning cylinder top, in order to installation.

(9) Figure 14, Figure 15 is vertical rotation axle rotating plate type valve opening and closing device embodiment: it is by crank (110), tilting oil guide plate (111), the valve cover plate (112) that horizontally rotates, vertical rotation axle (113), locking double nut (114), axle bed (115) and end face are that smoking port (116) the valve cover plate of level is closed limiting plate (117), the valve cover plate is opened limiting plate (118) and is prevented guide rail (119) composition of valve cover plate landing.

(10) Figure 16 is inclination turning cylinder rotating plate type valve cover plate open-close device embodiment: wherein (120) are the inclination turning cylinder, (121) be valve cover plate with the parallel rotation of smoking cover ramped bottom surface, (122) be the end face smoking port parallel with the smoking cover bottom surface, all the other part and Figure 15, Figure 16 vertical rotation axle type is identical.

(11) Figure 17 is the installation enforcement illustration of the insulation blocking plate (125) of pernicious gas watch-dog and culinary art steamed rice timing signal device.

(12) Figure 19 is the installation embodiment of the protection box (126) of pernicious gas watch-dog and culinary art steamed rice timing signal device.

(13) Figure 19 is eccentric 128 embodiment of support, and it can be contained on the valve cover plate eccentric position or become with the valve cover plate below the smoking cover top board on the position of off-centre.

(14) Figure 20, Figure 21 is the split type smoking cover embodiment of enclosed shape, it is by oil collection box (145), link plate (146), built-in lighting lampshade (147), outlet flue (148), smoking port (149) and enclosed shape smoking cover case (151) are formed, and its side-looking transverse shape is that an inequilateral is trapezoidal, and the back side is vertically by wall, the end face level, or be with a bit sweptback plane slightly, 2 smoking ports (149) are positioned on the downward inclined-plane, also have several hanging holes of hanging on the cooking stove wall up and down on the link plate (146), by the gradient of the adjustable forward oil collection box one effluent oil of several hanging holes up and down, this gradient is 0～5 degree.

Claims

1, a kind of separating kitchen ventilator, by blower fan, fan supporter, pipeline, split type smoking cover, kitchen cabinet, oil collection box, illuminating lamp, electric switch, pernicious gas watch-dog, culinary art steamed rice timing signal device, the valve cover plate open-close device is formed; Its smoking cover is one and does not contain blower fan, becomes the split type smoking cover of enclosed shape of a monomer alone, is provided with 1～2 smoking port and 1～2 corresponding valve opening and closing device in the cover; In case of necessity, a heat dissipating housing can be housed also below the inclined-plane at smoking cover smoking port place, this heat dissipating housing be one can allow ambient cold air along the smoking port inclined-plane air blanketing of heat loss through convection from bottom to up; Blower fan adopts single speed blower fan, the perhaps adjustable double speed blower fan of air quantity; Blower fan is adorned outdoor separately, also can be added with a rain cover, the split type smoking cover of the enclosed shape in blower and pipeline and the kitchen is connected, this blower fan also can be installed in away from by the public chimney in the kitchen of cooking stove, it is characterized in that: adopt a kind of volume that takes up room little on the smoking port in the split type smoking cover of enclosed shape, can further dwindle the smoking cover size and not fall into rotating plate type valve cover plate open-close device in the frying pan to improve smoking efficient And and tar is dripped to flow away along the inclined-plane of oil guide plate mechanism, it is made up of flap mechanism and oil guide plate mechanism: (1) flap mechanism is provided with a turning cylinder, have a valve cover plate that rotates with turning cylinder on the turning cylinder, on the base plate of turning cylinder lower end smoking port, be provided with an axle bed (115), turning cylinder upper end pass the smoking cover top board above be provided with swing handle (110), valve opening limiting plate (118) when on smoking cover smoking port base plate, also being provided with the valve cover plate and reaching, valve cover plate during valve closing is closed limiting plate (117), the guide rail (119) that does not drop when rotating with the maintaining valve door cover plate, turning cylinder divides vertical rotation axle and two kinds of mounting means of inclination turning cylinder, a valve cover plate (112) that horizontally rotates is housed on the vertical rotation axle (113), the smoking port end face of Pei Heing is also made horizontal plane (116) with it, (120) are equipped with a valve cover plate (121) with smoking cover ramped bottom surface parallel rotation on the inclination turning cylinder, and the end face of its smoking port is made on plane (122) the vertical rotation axle (113) that parallels with the smoking cover ramped bottom surface or the inclination turning cylinder (120) also can prevent the brake that the valve cover plate moves with a cover in case of necessity; (2) there are two kinds of forms in oil guide plate mechanism: (A) be fixed on the smoking port top, the tilting oil guide plate (111) under the smoking cover end face; (B) enclosed shape smoking cover end face is made the end face that band tilts, the inclination angle is a principle so that oil droplet is flowed away.

2, a kind of separating kitchen ventilator, by blower fan, fan supporter, pipeline, split type smoking cover, kitchen cabinet, oil collection box, illuminating lamp, electric switch, pernicious gas watch-dog, culinary art steamed rice timing signal device and valve cover plate open-close device are formed; Its smoking cover is one and does not contain blower fan, becomes the split type smoking cover of enclosed shape of a monomer alone, is provided with 1～2 smoking port and 1～2 corresponding valve opening and closing device in the cover; In case of necessity, a heat dissipating housing can be housed also below the inclined-plane at smoking cover smoking port place, this heat dissipating housing be one can allow ambient cold air along the smoking port inclined-plane air blanketing of heat loss through convection from bottom to up; Blower fan adopts single speed blower fan, the perhaps adjustable double speed blower fan of air quantity; Blower fan is adorned outdoor separately, also can be added with a rain cover, blower and pipeline is connected with the split type smoking cover of the enclosed shape in the kitchen, this blower fan also can be installed in away from by the public chimney in the kitchen of cooking stove, it is characterized in that: adopt a kind of volume that takes up room little on the smoking port in the split type smoking cover of enclosed shape, can further dwindle the smoking cover size and Shuai And and tar is dripped can flow away along the inclined-plane of oil guide plate mechanism and do not fall into lift valve cover plate open-close device in the frying pan to improve smoking Xiao, it is made up of elevating mechanism and oil guide plate mechanism: (1) elevating mechanism has following 5 kinds of patterns: (A) spiral arm type; (B) electromagnetism swage; (C) boatswain chair type; (D) elevator type and (E) straight rod type, (2) oil guide plate mechanism is made of valve cover plate and eccentric the support, eccentric support to be contained in be positioned on the eccentric position of valve cover plate one side below the smoking cover top board, or directly be contained on the eccentric position of a side on the valve cover plate, also can utilize eccentric support of support of bearing double as of elevating mechanism, when the valve cover plate is promoted to the smoking cover top by elevating mechanism, effect by the off-centre support, make valve cover plate and smoking cover horizontal top surface constitute the oil guide plate inclined-plane of a stream oil, thereby oil droplet is flowed away along the oil guide plate inclined-plane, flow into oil collection box through the bottom oil groove, and directly do not fall into frying pan from valve cover plate bottom surface, the angle of inclination on this inclined-plane is a principle can allow oil droplet flow away, and elevating mechanism also has a cover can prevent the brake that the valve cover plate falls after rise.

3, separating kitchen ventilator according to claim 2, it is characterized in that the elevating mechanism in the said lift valve cover plate open-close device is a kind of spiral arm type elevating mechanism, rotary arm shaft (6) is supported on the support of bearing (7) in the smoking cover, the one end stretches out a spiral arm (8) that becomes an angle of 90 degrees with turning cylinder, the spiral arm end is made living of can freely swinging with valve cover plate (11) and is connected, the outside of passing the smoking cover panel at the other end of rotary arm shaft is provided with crank (1), be fixed on the rotary arm shaft by pin (2), on this rotary arm shaft (6), have a cover and prevent the brake that the valve cover plate falls after rise, when valve cover plate (11) is promoted to the smoking cover end face by spiral arm (8), when (11) one side impacts of valve cover plate are supported (10) to off-centre, constitute the oil guide plate inclined-plane of a stream oil, in order to reduce the frictional resistance on the brake, also can on spiral arm, a side relative add one group of counterweight with the valve cover plate.

4, separating kitchen ventilator according to claim 2, it is characterized in that the elevating mechanism in the said lift valve cover plate open-close device is a kind of electromagnetism swage elevating mechanism, lever arm (30) or (39) are supported in (28) or (35) on the smoking cover inner bearing support, the one edge tail is made living of can freely swinging with valve cover plate (31) or (40) and is connected, in the other end chute of lever arm, plug electromagnet traction pin (27), or between the support of bearing and valve cover plate, draw pin (36) near plugging electromagnet in the support of bearing lever arm chute partly, during energising, the valve cover plate is opened, during outage, the valve cover plate is closed, on electromagnet energising circuit, also can add a timing automatic timer or an automatic timeing closing device of computer of closing solenoid circuit, in order to reduce the electromagnet power demand.Also can on lever, add a counterweight (26) or balancing spring (37), during the electromagnet energising, itself just be equivalent to a brake that can prevent that the valve cover plate from falling after rise.

5, according to the described separating kitchen ventilator of claim 2, it is characterized in that the elevating mechanism in the said lift valve cover plate open-close device is a kind of boatswain chair type elevating mechanism, one end of its lifting rope (62) is connected with valve cover plate (65), the other end passes the aperture of smoking cover panel by a lifting rope ring (64) or pulley, hook (61) is suspended on the hanging column (60), also can be connected in series a back-moving spring (67) on the lifting rope, hook (61) and hanging column (60) constitute a brake that prevents that the valve cover plate from falling after rise.Also be provided with the valve cover plate that faces toward the smoking port center when maintaining valve door cover plate falls and close limiting plate (66) on the base plate of smoking port, lifting rope can adopt metal or thin chain or fire-retardant rope.

6, separating kitchen ventilator according to claim 2, it is characterized in that the elevating mechanism in the said lift valve cover plate open-close device is a kind of elevator type elevating mechanism, elevator axle (75) is supported on the support of bearing (76) in the smoking cover, be wound with lifting rope (79) on the elevator axle, the lifting rope lower end connects valve cover plate (80), the outside that the elevator axle passes the smoking cover panel is provided with crank (71), crank is fixed by pin (70) and elevator axle, the brake that prevents that the valve cover plate from falling after rise is housed on the elevator axle, also be provided with the valve cover plate limiting plate (78) that faces toward the smoking port center when maintaining valve door cover plate falls on the base plate of smoking port, lifting rope can adopt wire or thin chain or fire-retardant rope.

7, separating kitchen ventilator according to claim 2, it is characterized in that the elevating mechanism in the said lift valve cover plate open-close device is a kind of straight rod type elevating mechanism, partly be provided with a non-return pin (87) at lifting straight-bar (90) near the lower end, lifting straight-bar lower end adopts living of can freely swinging to be connected with valve cover plate (89), pass smoking cover top board place at the lifting straight-bar, have hole, a notched garden (85), this breach only allows non-return pin (87) to passing through on time, after valve cover plate (89) rises to the top, just turn to another direction partially and can not fall after rise, this non-return pin and hole, notched garden constitute the brake that prevents that the valve cover plate from falling after rise.

8, according to claim 1 or 2 or 3 or 6 described separating kitchen ventilators, it is characterized in that preventing that the valve cover plate from moving or the brake that falls after rise has three kinds of forms in said rotating plate type or the lift valve cover plate switching mechanism: (1) friction brakes, by packing ring (4), spring (3) and locking nut or the locking nut of being made up of double nut (5) are formed, (2) bump pearl formula brake, it is by crank (95), bolt (96), location orifice plate (97) bumps funicle (98), steel ball (99), spring (100), bump pearl shell (101), turning cylinder (102), and pin pin-and-hole (103) is formed.(3) automatic load sustaining brake is made up of click.

9, band kitchen cabinet separating kitchen ventilator according to claim 1 and 2, it is characterized in that the split type smoking cover of said enclosed shape, the profile of its case (151) is a smoking cover case that inequilateral is trapezoidal, the back side is vertically by wall, end face is horizontal plane or is the sweptback plane a bit of band slightly, the trapezoidal inclined-plane of inequilateral towards declivity to frying pan, two smoking ports (149) about having on this inclined-plane, be embedded with an illuminating lamp shade (147) by upper part in the middle of the inclined-plane, oil collection box (145) is positioned at the bottom of inclined-plane one side, during installation to 0～5 ° of degree of oil collection box lopsidedness, in order to stream oil, pipe (148) is positioned at the centre at smoking cover top, also has up and down several hanging holes of hanging on the cooking stove wall on the link plate (146), can adjust gradient to oil collection box one effluent oil by several hanging holes up and down.

10, separating kitchen ventilator according to claim 1 and 2; it is characterized in that the split type smoking cover of said enclosed shape, in its cover, also have the insulation blocking plate (125) or the protection box (126) of a pernicious gas watch-dog and culinary art steamed rice timing signal device.