CN220471714U - Fume exhausting equipment - Google Patents

Abstract

The utility model belongs to the technical field of electric appliances, and particularly discloses oil smoke pumping and exhausting equipment. The fume exhaust device comprises a fume collecting hood, a filter screen and a driving component. The fume collecting hood is provided with a fume collecting cavity and a fume inlet communicated with the fume collecting cavity; the filter screen extends along the left-right direction, two ends of the filter screen are rotatably arranged in the smoke collecting cavity, and the filter screen is used for filtering the oil smoke entering from the smoke inlet; the driving assembly is arranged in the smoke collecting cavity and detachably connected with the filter screen, and comprises a rotating motor which is used for driving the filter screen to rotate around an axis extending in the left-right direction so as to adjust the inclination angle of the filter screen relative to the horizontal plane. According to the oil smoke pumping equipment disclosed by the utility model, the running state of the filter screen can be automatically adjusted according to the pumping requirement of the oil smoke pumping equipment, the requirements of oil smoke filtering and oil smoke pumping efficiency are considered, and the use experience of the oil smoke pumping equipment is improved.

Description

Fume exhausting equipment

Technical Field

The utility model relates to the technical field of electric appliances, in particular to oil smoke pumping and exhausting equipment.

Background

The smoke inlet of the existing smoke exhaust equipment such as a smoke exhaust ventilator or an integrated kitchen range is provided with a filter screen, and the smoke can be contacted with the filter screen when passing through the filter screen, so that part of heat of the smoke is absorbed by the filter screen, namely part of the smoke is condensed and filtered by the filter screen, and the effect of separating grease is realized.

The prior art provides a range hood with a turnover filter screen, which comprises a filter screen, a guide plate, a sliding component and a range hood body, wherein the upper end of the filter screen is movably connected with the sliding component, the lower end of the filter screen is movably connected with the front end of the guide plate, and the rear end of the guide plate is movably connected with the range hood body. When the range hood starts to operate, the screw motor assembly drives the filter screen to turn down along the sliding assembly, and then drives the guide plate to synchronously turn down, so that a negative pressure area below the filter screen moves down, and a smoke collecting cavity formed by the filter screen and the guide plate is closer to the cooking bench. When the range hood does not work, the screw rod motor drives the filter screen and the guide plate to turn upwards, and the filter screen and the guide plate are folded into the range hood body, so that the overall appearance of the range hood is attractive and tidy.

The range hood with the turnover filter screen provided by the prior art has the advantages that the filter screen can be turned over, but the filter screen and the guide plate are in linkage arrangement, the downward detection of the filter screen and the guide plate is realized to be close to the cooking bench downwards when the range hood is in operation, the smoke gathering efficiency is improved, and the filter screen and the guide plate are positioned inside the range hood body when the range hood is not in operation so as to enhance the attractiveness. This kind of setting for the filter screen can't be adjusted according to the demand of oil smoke evacuation alone, reduces the flexibility that the filter screen was adjusted, thereby reduces the flexibility that the range hood used.

Disclosure of Invention

The utility model aims to provide oil smoke exhaust equipment, which can effectively solve the problem that the existing filter screen and the guide plate are linked and turned over to cause that the filter screen cannot be independently adjusted to meet the oil smoke condensation effect or reduce the air duct resistance requirement, improve the flexibility of adjusting the filter screen and improve the use flexibility of the oil smoke exhaust equipment.

The technical problems are solved by the following technical scheme:

a range hood comprising:

the smoke collecting hood is provided with a smoke collecting cavity and a smoke inlet communicated with the smoke collecting cavity;

the filter screen extends along the left-right direction, two ends of the filter screen are rotatably arranged in the smoke collecting cavity, and the filter screen is used for filtering the oil smoke entering from the smoke inlet;

the driving assembly is arranged in the smoke collecting cavity and detachably connected with the filter screen, and comprises a rotating motor which is used for driving the filter screen to rotate around an axis extending in the left-right direction so as to adjust the inclination angle of the filter screen relative to the horizontal plane.

Compared with the background technology, the oil smoke pumping and exhausting equipment has the following beneficial effects: through setting up the axis of rotation pivoted filter screen that can extend around left and right directions for can be through adjusting the contained angle between filter screen and the horizontal plane, satisfy the effect to oil smoke filter effect or reduce wind channel resistance, make when the oil smoke volume is less, can make the filter screen tend to the level setting and satisfy the demand of oil smoke condensation, thereby make the inclination between the relative horizontal plane of filter screen increase and reduce wind channel resistance and strengthen oil smoke pumping efficiency when the oil smoke volume is great, thereby improve the flexibility that the filter screen used, improve the flexibility of use and the use experience of oil smoke pumping equipment; meanwhile, the filter screen is driven to rotate by the rotating motor, so that the filter screen can independently rotate without being linked with other overturning structures, the use flexibility of the filter screen is improved, the oil smoke exhaust equipment can be provided with the overturning panel, the oil smoke exhaust equipment without the overturning panel, and the design flexibility of the oil smoke exhaust equipment is improved.

In one embodiment, two ends of the filter screen are connected with rotating shafts, and one rotating shaft forms a screen driving shaft;

the driving assembly comprises a connecting shaft and a fixing support, the fixing support is installed in the fume collecting hood, the connecting shaft extends along the left-right direction and is rotatably installed on the fixing support, the net driving shaft is coaxially and detachably connected with the first end of the connecting shaft, and the rotating motor is in transmission connection with the connecting shaft to drive the connecting shaft to rotate.

In one embodiment, the first end of the connecting shaft is provided with a plug-in slot, the plug-in slot penetrates through the side wall of the connecting shaft to form a lateral notch, the net driving shaft can pass through the lateral notch to enter and exit the plug-in slot, and when the net driving shaft is inserted into the plug-in slot, the net driving shaft is coaxial with the connecting shaft and is fixedly connected in the circumferential direction.

In one embodiment, the insertion groove penetrates through a front groove wall of the connecting shaft;

and/or part of the groove walls of the inserting grooves form planar rotation stopping groove walls, the outer side walls of the net driving shafts are cut with rotation preventing planes, and the rotation preventing planes are attached to the rotation stopping groove walls;

and/or, the inserting groove comprises a positioning groove part and a flaring groove part which are communicated, the flaring groove part is arranged in a flaring shape along the direction away from the positioning groove part, one end of the flaring groove part away from the positioning groove part penetrates through the side wall of the connecting shaft and forms the lateral notch, and when the net driving shaft is inserted into the positioning groove part, the net driving shaft is coaxial with the connecting shaft and is fixedly connected in the circumferential direction.

In one embodiment, the connecting shaft comprises a transmission connecting block and a main shaft body, the main shaft body is rotatably installed on the fixed support and is in transmission connection with the rotating motor, a first end of the transmission connecting block is detachably connected with one end of the main shaft body and is located on the outer side of the fixed support, and a second end of the transmission connecting block is provided with the inserting groove.

In one embodiment, a connecting slot is formed at the first end of the transmission connecting block, a first convex rib is convexly arranged on the slot wall of the connecting slot, and one end of the main shaft body is inserted into the connecting slot and abuts against the first convex rib;

and/or the first end of the transmission connecting block is provided with a connecting slot, one end of the main shaft body is inserted into the connecting slot, the cross section of the main shaft body is a non-circular cross section, and the shape of the connecting slot is the same as that of the main shaft body.

In one embodiment, the driving assembly further comprises a transmission assembly, the transmission assembly comprises a driven gear sleeved on the connecting shaft and a driving gear sleeved on a motor shaft of the rotating motor, and the driving gear is directly meshed with the driven gear or at least one intermediate gear is meshed between the driving gear and the driven gear.

In one embodiment, the fume collecting hood is provided with two left and right opposite outer side plates arranged at intervals, the fume collecting hood further comprises a mounting partition plate which is opposite to the outer side plates and arranged at intervals, the driving assembly is mounted between the mounting partition plate and the adjacent outer side plates, and the filter screen is positioned between the mounting partition plate and the other outer side plate.

In one embodiment, at least two filter screens are arranged at intervals along the vertical direction, one filter screen is a driving filter screen, the other filter screens are driven filter screens, the driving filter screen is connected with the driving assembly, and two adjacent filter screens are connected in a linkage manner through a synchronous transmission piece.

In one embodiment, the oil smoke exhaust apparatus further includes a controller and an oil smoke detection device, the rotating motor and the oil smoke detection device are all in communication connection with the controller, and the controller can control the rotating motor to operate according to the oil smoke amount detected by the oil smoke detection device so as to control the rotation angle of the filter screen.

Drawings

Fig. 1 is a schematic structural diagram of a fume exhaust device according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of the oil soot extractor provided by an embodiment of the present utility model when the oil screen is in a horizontal state;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

fig. 4 is a partial cross-sectional view of a cooking fume extractor provided in an embodiment of the present utility model when the oil screen is in an inclined state;

fig. 5 is a partial cross-sectional view of a smoke evacuation device according to an embodiment of the present utility model;

FIG. 6 is an enlarged view of a portion of J in FIG. 5;

FIG. 7 is a schematic view of a screen and drive assembly according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a transmission connection block according to an embodiment of the present utility model;

fig. 9 is a schematic structural diagram of a transmission connection block according to an embodiment of the present utility model in another view.

Description of the reference numerals:

100. a smoke collecting mechanism; 200. a pumping mechanism; 201. a wind box; 202. a blower;

1. a screen assembly; 11. a fixed frame; 12. a filter screen; 12a, an active filter screen; 12b, a driven filter screen; 13. a synchronous transmission member; 14. a mesh drive shaft;

2. a drive assembly; 21. a connecting shaft; 211. a main shaft body; 212. a transmission connecting block; 2121. a plug-in groove; 21211. a positioning groove part; 21212. flaring groove part; 21213. a rotation stopping groove wall; 2122. a connection slot; 2123. the first convex rib; 213. a convex ring portion; 22. a rotating electric machine; 23. a fixed bracket; 231. a rear plate portion; 232. a shaft plate portion; 24. a transmission assembly; 241. a drive gear; 242. a driven gear;

3. a fume collecting hood; 31. a back plate; 32. an outer panel; 33. installing a partition board; 34. a smoke inlet; 35. a smoke collecting cavity;

4. a smoke guide plate; 5. an oil cup; 6. a panel.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, 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 or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

As shown in fig. 1 and 2, the present embodiment provides a cooking fume extractor, which can be applied to a kitchen to realize cooking fume extraction in a cooking process, improve the environmental comfort of the kitchen, and further improve the cooking comfort; it can also be used in barbecue or other restaurants to pump out the oil smoke that produces in the barbecue process.

As shown in fig. 2 to 6, the oil smoke exhaust apparatus includes an oil smoke collecting mechanism 100 and an exhaust mechanism 200. The smoke collecting mechanism 100 comprises a smoke collecting cover 3, a filter screen assembly 1 and a driving assembly 2, wherein the smoke collecting cover 3 is provided with a smoke inlet 34, a smoke collecting cavity 35 and an air outlet, and the smoke collecting cavity 35 is formed between the smoke inlet 34 and the air outlet of the smoke collecting cover 3; the filter screen assembly 1 comprises a filter screen 12, and the filter screen 12 extends along the left-right direction and is rotatably arranged in the smoke collecting cavity 35; the driving component 2 is installed on the fume collecting hood 3 and detachably connected with the filter screen 12, the driving component 2 comprises a rotating motor 22, and the rotating motor 22 is used for driving the filter screen 12 to rotate around an axis extending in the left-right direction so as to adjust the inclination angle of the filter screen 12 relative to the horizontal plane.

The pumping mechanism 200 comprises a fan 202, when the fan 202 operates, the oil smoke enters the smoke collecting cavity 35 from the smoke inlet 34 and is discharged outside, pumping of the oil smoke is achieved, and the oil smoke is condensed and filtered by the filter screen 12 when passing through the filter screen 12. The lower extreme of collection petticoat pipe 3 is provided with oil cup 5, and the waste oil that the oil smoke condensation produced flows into oil cup 5 along the inner wall of collection petticoat pipe 3 to make oil cup 5 collect the waste oil in the collection petticoat pipe 3.

According to the oil smoke exhaust equipment provided by the embodiment, the filter screen 12 can rotate around the axis extending in the left-right direction to adjust the inclination angle of the filter screen 12 relative to the horizontal plane, so that the oil smoke condensation effect and the air channel resistance generated by the filter screen 12 can be adjusted according to cooking requirements. In general, when the inclination angle of the filter screen 12 relative to the horizontal plane is larger, the projection area of the filter screen 12 on the horizontal plane is smaller, the contact area of the filter screen 12 and the oil smoke is smaller, so that the resistance of the oil smoke passing through is smaller, and the filtering effect on the oil smoke is relatively poorer; when the inclination angle of the filter screen 12 relative to the horizontal plane is smaller, the projection area of the filter screen 12 on the horizontal plane is larger, the contact area of the filter screen 12 and the oil smoke is larger, so that the resistance of the oil smoke passing through is larger, and the filtering effect on the oil smoke is relatively better.

Namely, in the oil smoke exhaust apparatus provided in this embodiment, by setting the filter screen 12 capable of rotating around the rotation axis extending in the left-right direction, the effect of filtering oil smoke or reducing the resistance of the air duct can be satisfied by adjusting the included angle between the filter screen 12 and the horizontal plane, so that when the oil smoke amount is small, the filter screen 12 tends to be horizontally set to satisfy the requirement of oil smoke condensation, and when the oil smoke amount is large, the inclination angle between the filter screen 12 and the horizontal plane is increased to reduce the resistance of the air duct, thereby enhancing the oil smoke exhaust efficiency, improving the flexibility of use of the filter screen 12, and improving the use flexibility and the use experience of the oil smoke exhaust apparatus; meanwhile, the filter screen 12 is driven to rotate by the rotary motor 22, so that the filter screen 12 can rotate independently without being linked with other overturning structures, the use flexibility of the filter screen 12 is improved, the oil smoke exhaust equipment can be oil smoke exhaust equipment with a panel of a turning plate, the oil smoke exhaust equipment without the panel of the turning plate, and the design flexibility of the oil smoke exhaust equipment is improved.

In one embodiment, the fume exhaust device is a range hood separated from a gas stove, and the fume exhaust mechanism 200 includes a blower 201 mounted at the top end of the fume collecting mechanism 100, where the blower 202 is disposed inside the blower 201 or in the fume collecting cavity. In yet another embodiment, the oil smoke evacuation device is an integrated oven and the blower 202 is disposed below the smoke collection mechanism 100 and the integrated oven.

In an embodiment, the smoke inlet 34 is formed at the front side of the smoke collecting hood 3, the smoke collecting mechanism 100 is in a 7-shaped arrangement, namely, the smoke collecting hood 3 comprises a smoke collecting vertical part and a smoke collecting horizontal part which are vertically arranged, the rear end of the smoke collecting horizontal part is connected with the top end of the smoke collecting vertical part, the front end extends forwards, an air outlet is formed in the top plate of the smoke collecting horizontal part, and the smoke pumping and exhausting mechanism 200 is mounted to the top end of the smoke collecting horizontal part. The smoke inlet 34 is arranged on the smoke gathering vertical part, and the filter screen component 1 is arranged in the smoke gathering vertical part. The thickness of the smoke collecting vertical part of the oil smoke pumping and exhausting equipment can be thinner than that of a conventional side-draught type smoke ventilator.

In another embodiment, smoke inlets 34 can be formed on two opposite sides of the smoke collecting hood 3, namely, the smoke pumping and exhausting device is a double-side air inlet middle island type smoke ventilator, and the smoke entering the smoke collecting hood 3 from the smoke inlets 34 on two sides flows upwards to the fan 202 after being filtered by the filter screen assembly 1.

The front side of the fume collecting hood 3 is provided with the panel 6, the panel 6 is approximately opposite to the backboard 31 of the fume collecting hood 3 and is arranged at intervals, the panel 6 is positioned above the fume inlet 34, the filter screen assembly 1 is arranged between the panel 6 and the backboard 31, and two ends of the filter screen 12 can rotate to be respectively close to the panel 6 and the backboard 31, so that the installation space of the filter screen 12 can be increased, the rotatable angle of the filter screen 12 is increased, and the installation convenience of the filter screen assembly 1 in the fume collecting hood 3 is improved; meanwhile, due to the arrangement, when the filter screen 12 is horizontally arranged, the width of the filter screen 12 can be matched with the interval between the panel 6 and the back plate 31, the probability of interference with the fume collecting hood 3 in the rotation process of the filter screen 12 is reduced, and the installation convenience of the filter screen assembly 1 in the fume collecting hood 3 is improved. In another embodiment, the panel 6 may also extend obliquely forward from bottom to top.

In an embodiment, the filter screen 12 can rotate between an initial position and an inclined position, when the filter screen 12 is in the initial position, the filter screen 12 is horizontally arranged, so that the filter screen 12 has the largest contact area with the oil smoke when the oil smoke flows upwards, and the oil smoke filtering effect is good; when the filter screen 12 is in an inclined position, the included angle between the filter screen 12 and the horizontal plane is alpha, and alpha is less than or equal to 90 degrees, so that the adjusting range of the filter screen 12 can be increased, and the efficiency of oil smoke pumping and exhausting is increased. In other embodiments, the filter screen 12 may be disposed at an angle relative to the horizontal, and the angle of inclination of the filter screen 12 relative to the horizontal may be adjusted by rotation of the filter screen 12.

Further, the smoke collecting mechanism 100 further comprises a smoke guide plate 4, the smoke guide plate 4 is provided with a smoke inlet 34, the smoke guide plate 4 extends upwards and backwards from the lower side of the smoke inlet 34, and the filter screen assembly 1 is arranged above the smoke guide plate 4, so that the smoke guide plate 4 guides the oil smoke to flow towards the filter screen assembly 1.

In an embodiment, when the filter screen 12 is in the inclined position, the filter screen 12 extends downwards from back to front, so that an inclined smoke guide channel is formed between the lowest filter screen 12 and the smoke guide plate 4, which is more beneficial to guiding the oil smoke to flow in and improving the smoke collecting effect. In other embodiments, the screen 12 may also extend obliquely rearward from top to bottom when the screen 12 is in the inclined position.

To improve the filtering effect of the oil smoke, in an embodiment, the filter screen assembly 1 includes a plurality of filter screens 12 arranged from top to bottom at intervals, so that when the oil smoke enters the smoke collecting cavity 35 from the smoke inlet 34, the oil smoke passes through the plurality of filter screens 12 in sequence, and the filtering effect on the oil smoke can be effectively improved. One filter screen 12 is a driving filter screen 12a, the other filter screens 12 are driven filter screens 12b, one end of the driving filter screen 12a is connected with the driving component 2, and two adjacent filter screens 12 are in linkage arrangement through the synchronous transmission piece 13, so that one driving component 2 drives all the filter screens 12 to synchronously rotate, driving cost is reduced, and structure is simplified. In other embodiments, only one screen 12 may be provided.

In an embodiment, the synchronous transmission member 13 may be a connecting rod, two ends of the connecting rod are hinged to two adjacent filter screens 12 respectively, and in other embodiments, the synchronous transmission member 13 may be a connecting rope, the connecting rope is connected to two adjacent filter screens 12, and two connecting ropes are opposite to each other and are arranged at intervals between corresponding ends of the two adjacent filter screens 12.

The present utility model is not limited to a specific structure for achieving the synchronous rotation of the two screens 12.

In one embodiment, three filter screens 12 are arranged at intervals from top to bottom, so as to simplify the structure of the filter screen assembly 1 while improving the oil smoke filtering effect. Preferably, the width of the filter screen 12 is W, the interval between two adjacent filter screens 12 is 0.5W-2W, and more preferably 0.5W-1W, so that the problem of increased air duct resistance caused by too small interval between two adjacent filter screens 12 can be avoided, and the problem of larger occupied space of the filter screen assembly 1 in the vertical direction caused by too large interval between two adjacent filter screens 12 can be avoided.

In order to further improve the filtering effect of the oil smoke, when the filter screens 12 are horizontally arranged, the projections of the filter screen holes of two adjacent filter screens 12 on the horizontal plane are at least partially arranged in a staggered mode, so that the contact area between the oil smoke and the upper filter screen 12 can be increased when the oil smoke passes through one filter screen 12 and flows to the upper filter screen 12, and the filtering and condensing effects of the oil smoke are improved.

In an embodiment, for improving the convenience of disassembly and assembly of the filter screen 12, the filter screen assembly 1 further comprises a fixed frame 11, two ends of each filter screen 12 are outwards extended to form a rotating shaft, and the rotating shaft is rotatably installed in the fixed frame 11, so that the filter screen assembly 1 forms a structure capable of being disassembled and assembled integrally relative to the fume collecting hood 3, and the convenience of disassembly and assembly of the filter screen assembly 1 is improved. In other embodiments, the rotary shaft of the filter 12 may be directly rotatably connected to the hood 3.

As shown in fig. 6 to 9, the rotation shaft at one end of the active screen 12a forms a screen driving shaft 14, and the screen driving shaft 14 is connected to the driving unit 2.

In one embodiment, the driving assembly 2 further comprises a connecting shaft 21 and a fixing bracket 23, the fixing bracket 23 is installed in the fume collecting hood 3, the connecting shaft 21 is rotatably installed on the fixing bracket 23 and extends along the left-right direction, the connecting shaft 21 is coaxial with the net driving shaft 1414 and detachably connected, and the rotating motor 22 is in transmission connection with the connecting shaft 21 to drive the connecting shaft 21 to rotate. By the arrangement, when the filter screen assembly 1 is dismounted from the fume collecting hood 3, the driving assembly 2 can be kept in the fume collecting hood 3, so that the problems of difficult wiring, high dismounting difficulty and the like caused by frequent dismounting of the driving assembly 2 are avoided while the dismounting and cleaning of the filter screen assembly 1 are realized, and the use convenience of the fume collecting mechanism 100 is improved; at the same time, by providing the connecting shaft 21, the length requirement for the net drive shaft 14 can be reduced, and the flexibility of the arrangement of the transmission assembly 24 can be improved.

In one embodiment, the driving assembly 2 comprises a rotating motor 22 and a transmission assembly 24, the rotating motor 22 is installed inside the fume collecting hood 3, and the transmission assembly 24 is connected between the rotating motor 22 and the connecting shaft 21 in a transmission manner, so that the rotating motor 22 drives the net driving shaft 14 to rotate through the transmission assembly 24. By arranging the transmission assembly 24, the problems that the space occupied by the rotating motor 22 in the left-right direction is large and the rotating speed of the connecting shaft 21 is directly limited by the rotating speed of the rotating motor 22 due to the direct connection of the rotating motor 22 and the connecting shaft 21 are avoided, the space layout flexibility of the rotating motor 22 is improved, and the design of the rotating speed of the filter screen 12 is facilitated.

To simplify the structure of the transmission assembly 24 and the driving assembly 2, in one embodiment, the transmission assembly 24 includes a gear set including a driving gear 241 sleeved on a motor shaft of the rotating motor 22 and a driven gear 242 sleeved on the connecting shaft 21, and the driven gear 242 is directly meshed with the driving gear 241. The gear ratio, and thus the rotational speed of the screen 12, may be controlled by the gear ratio of the driven gear 242 and the drive gear 241. In other embodiments, at least one intermediate gear may be engaged between the driving gear 241 and the driving gear, and the number of gears in the gear set may be specifically set according to the rotational speed of the rotary electric machine 22 and the set rotational speed of the filter screen 12. In other embodiments, the motor shaft of the rotating electric machine 22 may also be directly connected to the connecting shaft 21 by a coupling structure.

To improve the ease of assembly and disassembly of the filter screen assembly 1 within the fume collection hood 3, in one embodiment, the first end of the connecting shaft 21 is provided with a plug-in groove 2121, the plug-in groove 2121 penetrates through the side wall of the connecting shaft 21 to form a lateral notch, and one end of the screen drive shaft 14 away from the filter screen 12 can be plugged into or withdrawn from the plug-in groove 2121 through the lateral notch of the plug-in groove 2121, so that when the filter screen assembly 1 is installed into the fume collection hood 3, the screen drive shaft 14 can be plugged into the plug-in groove 2121 through the lateral notch to realize the connection between the connecting shaft 21 and the screen drive shaft 14; when it is desired to remove the screen assembly 1, the separation of the drive assembly 2 from the screen assembly 1 is accomplished by withdrawing the screen drive shaft 14 from the lateral slot out of the mounting groove 2121.

In an embodiment, the filter screen assembly 1 can be installed on the fume collecting hood 3 in a front-back drawing manner through the fume inlet 34, so that the disassembly and assembly convenience of the filter screen assembly 1 on the fume collecting hood 3 can be effectively improved, and the cleaning and replacement convenience of the filter screen assembly 1 is improved. Under the arrangement, when the filter screen assembly 1 needs to be disassembled and assembled, the connecting shaft 21 is rotated to the side notch to be arranged forwards, so that the disassembly and assembly requirement of the filter screen assembly 1 can be met, namely, when the filter screen assembly 1 slides forwards to withdraw the fume collecting hood 3, the net driving shaft 14 withdraws from the inserting groove 2121 from the front side notch of the inserting groove 2121, and the separation of the net driving shaft 14 and the connecting shaft 21 is realized; when the fume module is slid backward to be mounted in the fume collecting hood 3, the mesh driving shaft 14 is inserted into the insertion groove 2121 from the front side opening of the insertion groove 2121, and the mesh driving shaft 14 is connected to the connecting shaft 21.

To avoid the relative rotation between the net driving shaft 14 and the connecting shaft 21, in an embodiment, part of the groove walls of the insertion groove 2121 form a planar rotation stopping groove wall 21213, and an anti-rotation plane is cut on the outer side wall of the net driving shaft 14, and when the net driving shaft 14 is inserted into the insertion groove 2121, the anti-rotation plane is attached to the rotation stopping groove wall 21213, so that the net driving shaft 14 and the connecting shaft 21 are fixed in the circumferential direction, and synchronous rotation of the net driving shaft and the connecting shaft is ensured. In an embodiment, the groove walls 21213 of the lower side of the upper side groove wall of the insertion groove 2121 are all the rotation-preventing groove walls 21213, the two rotation-preventing groove walls 21213 are parallel and are arranged at intervals, the rotation-preventing planes are opposite and are arranged at intervals, the rotation-preventing groove walls 21213 are arranged in one-to-one correspondence with the rotation-preventing planes, so that the rotation-preventing effect is improved, and the transmission reliability between the rotation-preventing groove walls 2121 and the rotation-preventing plane is ensured. In other embodiments, one of the anti-rotation groove walls 21213 may be provided.

To improve the smoothness of the mesh drive shaft 14 entering the insertion groove 2121, the insertion groove 2121 includes a positioning groove portion 21211 and a flaring groove portion 21212, the flaring groove portion 21212 is provided in a flaring shape in a direction away from the positioning groove portion 21211, one end of the flaring groove portion 21212 away from the positioning groove portion 21211 penetrates through the side wall of the connecting shaft 21 and forms the above-mentioned lateral notch, and when the mesh drive shaft 14 is inserted into the positioning groove portion 21211, the mesh drive shaft 14 is coaxial with the connecting shaft 21 and fixedly connected circumferentially. The provision of flared slots 21212 facilitates guiding the insertion of mesh drive shaft 14 into detents 21211.

Further, the positioning groove portion 21211 has the above-described two rotation stop groove walls 21213. The groove wall of the positioning groove 21211 is preferably in arc smooth transition connection with the groove wall of the flaring groove 21212 so as to reduce the scratch of the net driving shaft 14.

In an embodiment, the two opposite sides of the positioning groove 21211 are respectively communicated with the flaring groove 21212, so that the connecting shaft 21 does not need to be foolproof during installation, the requirement of installing the net driving shaft 14 can be met no matter which side of the flaring groove 21212 is arranged in advance, the installation difficulty is reduced, and the installation efficiency is improved; meanwhile, through the arrangement of the two flaring groove parts 21212, when the rotating motor 22 drives the connecting shaft 21 to rotate to any flaring groove part 21212 on one side, the requirement of disassembly and assembly of the filter screen assembly 1 can be met, and the control difficulty of the driving assembly 2 is reduced.

In an embodiment, the connecting shaft 21 includes a main shaft body 211 and a transmission connecting block 212 which are detachably connected, the main shaft body 211 is rotatably mounted on the fixed bracket 23, the transmission connecting block 212 is located outside the fixed bracket 23 and is connected to the first end of the main shaft body 211, and the transmission connecting block 212 is provided with the above-mentioned insertion groove 2121. By arranging the split main shaft body 211 and the transmission connecting block 212, the structure of the transmission connecting block 212 can be specifically arranged according to the structure of the net driving shaft 14, and the structure of the main shaft body 211 can be specifically arranged according to the structure of the driven gear 242, so that the net driving shaft 14 with different sizes can be adapted by changing different transmission connecting blocks 212 on the basis of ensuring that the structures of the fixed support 23 and the main shaft body 211 are unchanged, and the universality of the driving assembly 2 is improved; meanwhile, when the groove wall of the insertion groove 2121 is worn, only the transmission connection block 212 can be replaced without integrally disassembling the transmission assembly 24 and the rotating motor 22, so that the replacement cost is reduced, and the replacement efficiency is improved.

The end of the transmission connection block 212 facing the fixed bracket 23 is provided with a connection slot 2122, and the first end of the main shaft body 211 extends out of the fixed bracket 23 and is inserted into the connection slot 2122. The cross section of the main shaft body 211 is a non-circular cross section, and the shape of the connecting slot 2122 is the same as the cross section of the main shaft body 211, so that the relative rotation of the main shaft body 211 and the transmission connecting block 212 is avoided, and the transmission reliability is ensured. The side of the drive connection piece 212 facing away from the filter screen 12 preferably engages with the outer side of the fastening bracket 23, so that the drive connection piece 212 can be positioned axially of the main shaft body 211.

The shape of the shaft hole of the driven gear 242 is consistent with the cross-sectional shape of the main shaft body 211 to prevent the driven gear 242 and the main shaft body 211 from rotating with each other.

In an embodiment, the groove wall of the connection slot 2122 is convexly provided with a first protruding rib 2123, and the first protruding ribs 2123 are preferably arranged in a plurality of positions along the circumferential direction of the connection slot 2122, and the first protruding ribs 2123 abut against the outer side wall of the main shaft body 211. Therefore, the problem that the main shaft body 211 and the transmission connecting block 212 are not tightly inserted due to the processing error of the connecting slot 2122 or the main shaft body 211 can be avoided, the connection stability of the main shaft body 211 and the transmission connecting block 212 is ensured, and the transmission reliability between the main shaft body 211 and the transmission connecting block 212 is further improved. The height of the groove wall of the first rib 2123 protruding from the connecting groove 2122 is preferably 0.2mm to 0.6mm.

Further, the outer side wall of the main shaft body 211 is convexly provided with a convex ring portion 213, and the convex ring portion 213 is abutted against one side surface of the fixed support 23, which is far away from the transmission connecting block 212, so that the fixed support 23 is clamped between the convex ring portion 213 and the transmission connecting block 212, the installation positioning and limiting of the connecting shaft 21 on the fixed support 23 are realized, and the installation reliability and the installation efficiency are improved. The collar 213 may be integrally formed with the main shaft body 211, or may be connected to the main shaft body 211 by a snap fit or other means.

In an embodiment, the fixing support 23 includes a rear plate portion 231 and two shaft plate portions 232 protruding perpendicularly from the front side of the rear plate portion 231, the shaft plate portions 232 are parallel and spaced apart in the left-right direction, each shaft plate portion 232 is provided with a mounting shaft hole, the main shaft body 211 is rotatably disposed in the mounting shaft hole, and the collar portion 213 and the transmission connection block 212 are respectively abutted to the two shaft plate portions 232. The rear plate 231 is connected to the rear side wall of the smoke collecting chamber. The driven gear 242 is preferably disposed between the two shaft plate portions 232 to improve the compactness.

The rear plate 231 and the fume collecting hood 3 may be connected by screws, adhered, clamped or welded, which is not limited in this embodiment. In other embodiments, the fixing bracket 23 may be connected to one of the opposite side walls of the smoke collecting chamber in the left-right direction.

To further improve the automation degree of the rotation adjustment of the filter screen 12, in an embodiment, the oil smoke exhaust apparatus further includes a controller and an oil smoke detection device, where the rotating motor 22 and the oil smoke detection device are all connected to the controller in a communication manner, and the controller can control the rotating motor 22 to operate according to the oil smoke amount detected by the oil smoke detection device so as to control the rotation angle of the filter screen 12.

When the screen assembly 1 is in the initial state, the screen 1 is horizontally disposed. In the running process of the oil smoke pumping and exhausting equipment, the oil smoke detection device detects the oil smoke amount generated by cooking in real time and transmits the detected oil smoke amount information to the controller; when the detected oil smoke amount is larger than the preset oil smoke amount, the controller determines a target inclination angle of the filter screen 12 to be rotated according to the current oil smoke amount and sends a control signal to the rotating motor 22, and the rotating motor 22 controls the inclination angle of the oil screen.

Further, a relation between the oil smoke amount and the inclination angle of the oil net is built in the controller, and the relation can be obtained through theoretical calculation or experiments. The controller obtains the inclination angle of the oil screen corresponding to the current oil smoke amount according to the relation, thereby controlling the operation of the rotary motor 22.

In an embodiment, the end of the connecting shaft 21 away from the filter screen 12 extends out of the fixing support 23, so that the end of the connecting shaft 21 away from the filter screen 12 is beneficial to matching with other structures, and the universality of the transmission structure is improved. As in other embodiments, instead of the rotary motor 22, a knob may be mounted on the outer side plate 32 of the fume collecting hood 3, and the knob is connected to the end of the connecting shaft 21 away from the filter screen 12, so as to manually rotate the filter screen 12.

To improve the convenience of mounting the drive assembly 2, the fume collecting hood 3 includes mounting partitions 33 disposed parallel to and spaced apart from the outer panels 32, the mounting partitions 33 being disposed between the two outer panels 32, the two mounting partitions 33 forming the left and right sidewalls of the fume inlet 34. An installation space is formed between the installation partition plate 33 and the adjacent outer side plate 32, and the rotating motor 22, the gear set and the fixed support 23 are all installed in the installation space on one side so as to reduce the interference of oil smoke on the driving assembly 2. The front and rear sides of the mounting partition 33 are respectively connected with the front side of the fume collecting hood 3 and the back plate 31 to improve the overall rigidity and supporting performance of the fume collecting hood 3.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing detailed description of the embodiments presents only a few embodiments of the present utility model, which are described in some detail and are not intended to limit the scope of the present utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. A smoke evacuation apparatus comprising:

the smoke collecting cover (3) is provided with a smoke collecting cavity (35) and a smoke inlet (34) communicated with the smoke collecting cavity (35);

the filter screen (12) extends along the left-right direction and can be rotatably arranged in the smoke collecting cavity (35), and the filter screen (12) is used for filtering the oil smoke entering from the smoke inlet (34);

the driving assembly (2) is arranged in the smoke collecting cavity (35) and detachably connected with the filter screen (12), the driving assembly (2) comprises a rotating motor (22), and the rotating motor (22) is used for driving the filter screen (12) to rotate around an axis extending in the left-right direction so as to adjust the inclination angle of the filter screen (12) relative to the horizontal plane.

2. A cooking fume extractor according to claim 1, characterized in that both ends of said filter screen (12) are connected with a rotation shaft, one of said rotation shafts forming a screen drive shaft (14);

the driving assembly (2) comprises a connecting shaft (21) and a fixed support (23), the fixed support (23) is installed in the fume collecting hood (3), the connecting shaft (21) extends along the left-right direction and is rotationally installed on the fixed support (23), the net driving shaft (14) is coaxially and detachably connected with the first end of the connecting shaft (21), and the rotating motor (22) is in transmission connection with the connecting shaft (21) to drive the connecting shaft (21) to rotate.

3. The oil smoke evacuation device of claim 2 wherein said first end of said connection shaft (21) is provided with a socket (2121), said socket (2121) extending through a side wall of said connection shaft (21) to form a lateral slot through which said mesh drive shaft (14) can pass into and out of said socket (2121), and wherein said mesh drive shaft (14) is coaxially and circumferentially fixedly connected to said connection shaft (21) when said mesh drive shaft (14) is inserted into said socket (2121).

4. A cooking fume extractor according to claim 3, characterized in that said insertion slot (2121) penetrates the front slot wall of said connecting shaft (21);

and/or, part of the groove wall of the inserting groove (2121) forms a plane rotation stopping groove wall (21213), an anti-rotation plane is cut on the outer side wall of the net driving shaft (14), and the anti-rotation plane is attached to the rotation stopping groove wall (21213);

and/or, the inserting groove (2121) comprises a positioning groove part (21211) and a flaring groove part (21212) which are communicated, the flaring groove part (21212) is arranged in a flaring shape along the direction away from the positioning groove part (21211), one end of the flaring groove part (21212) away from the positioning groove part (21211) penetrates through the side wall of the connecting shaft (21) and forms the lateral notch, and when the net driving shaft (14) is inserted into the positioning groove part (21211), the net driving shaft (14) is coaxial with the connecting shaft (21) and is fixedly connected in the circumferential direction.

5. A cooking fume extractor according to claim 3, wherein the connecting shaft (21) comprises a transmission connecting block (212) and a main shaft body (211), the main shaft body (211) is rotatably mounted on the fixed support (23) and is in transmission connection with the rotating motor (22), a first end of the transmission connecting block (212) is detachably connected to one end of the main shaft body (211) and is located at the outer side of the fixed support (23), and a second end of the transmission connecting block (212) is provided with the insertion groove (2121).

6. The oil smoke exhaust apparatus of claim 5 wherein a first end of the transmission connection block (212) is provided with a connection slot (2122), a slot wall of the connection slot (2122) is convexly provided with a first convex rib (2123), and one end of the main shaft body (211) is inserted into the connection slot (2122) and abutted against the first convex rib (2123);

and/or, a connecting slot (2122) is formed in the first end of the transmission connecting block (212), one end of the main shaft body (211) is inserted into the connecting slot (2122), the cross section of the main shaft body (211) is a non-circular cross section, and the shape of the connecting slot (2122) is the same as the shape of the main shaft body (211).

7. The cooking fume extractor of any one of claims 2-6, wherein the driving assembly (2) further comprises a transmission assembly (24), the transmission assembly (24) comprises a driven gear (242) sleeved on the connecting shaft (21) and a driving gear (241) sleeved on a motor shaft of the rotating motor (22), and the driving gear (241) is directly meshed with the driven gear (242), or at least one intermediate gear is meshed between the driving gear (241) and the driven gear (242).

8. A range hood arrangement according to any one of claims 1 to 6, wherein the range hood (3) has two outer panels (32) arranged opposite and spaced apart from each other, and further comprising a mounting bulkhead (33) arranged opposite and spaced apart from the outer panels (32), the drive assembly (2) being mounted between the mounting bulkhead (33) and an adjacent outer panel (32), the filter screen (12) being located between the mounting bulkhead (33) and the other outer panel (32).

9. The oil smoke exhaust apparatus of any one of claims 1-6 wherein at least two of said screens (12) are arranged at intervals in a vertical direction, one of said screens (12) is a driving screen (12 a), the remaining screens (12) are driven screens (12 b), said driving screen (12 a) is connected to said driving assembly (2), and two adjacent screens (12) are connected in a linkage manner by a synchronous transmission member (13).

10. A smoke evacuation device according to any one of claims 1-6, further comprising a controller and smoke detection means, said rotary electric machine (22) and said smoke detection means being in communication with said controller, said controller being capable of controlling the operation of said rotary electric machine (22) in dependence on the amount of smoke detected by said smoke detection means to control the angle of rotation of said filter screen (12).