CN108980944B

CN108980944B - Fume exhaust fan

Info

Publication number: CN108980944B
Application number: CN201811133348.2A
Authority: CN
Inventors: 汪耀东; 季俊生; 蒋济武; 彭小康; 苏宋洲; 蓝渊; 张辉
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-09-27
Filing date: 2018-09-27
Publication date: 2023-09-12
Anticipated expiration: 2038-09-27
Also published as: CN108980944A

Abstract

The invention discloses a range hood which comprises a fan cover, a fume collecting hood and at least one fume condensing plate and an oil collecting cup of the fan cover. The fan housing defines a fan cavity, a fan is arranged in the fan cavity, the fan comprises an air inlet which is open towards the rear, the fume collecting hood is positioned below the fan housing, and a fume collecting cavity communicated with the fan cavity is defined. The oil smoke condensing plate is arranged in the smoke collecting cavity, the oil smoke condensing plate is obliquely arranged in the backward direction and is provided with a wind passing hole, the oil collecting cup is arranged below the smoke collecting cover and is connected with the rear wall plate of the smoke collecting cover, and the oil collecting cup is used for collecting condensed oil. The oil smoke condensing plate is arranged close to the rear wall plate of the fume collecting hood, and a first gap is formed between the oil smoke condensing plate and the rear wall plate of the fume collecting hood. According to the range hood provided by the embodiment of the invention, the oil fume condensing plate is arranged in the fume collecting cavity, so that the speed of accumulating oil stains by the fan is reduced, the cleaning degree of the range hood is ensured, and the use satisfaction of customers is improved.

Description

Fume exhaust fan

Technical Field

The invention relates to the field of household appliances, in particular to a range hood.

Background

In the process of fume extraction, the fume can be condensed when encountering the internal sheet metal structure of the fume extractor, and oil drops generated by condensation can flow into the oil collecting cup of the fume extractor. However, the existing range hood often has the phenomenon that condensed oil drops fall to a cooking bench, so that the customer experience is greatly reduced.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the range hood, which can greatly reduce the dripping of condensed oil and improve the customer satisfaction.

According to an embodiment of the invention, a range hood comprises: the fan cover is used for limiting a fan cavity, a fan is arranged in the fan cavity, and the fan comprises an air inlet which is opened backwards; the fume collecting hood is positioned below the fan cover and is used for limiting a fume collecting cavity communicated with the fan cavity; the oil smoke condensing plate is arranged in the smoke collecting cavity, is obliquely arranged towards the lower side in the backward direction, and is provided with a wind through hole; the oil collecting cup is positioned below the fume collecting hood and connected with the rear wall plate of the fume collecting hood, and is used for collecting condensed oil; wherein: the oil smoke condensing plate is arranged close to the rear wall plate of the fume collecting hood, and a first gap is formed between the oil smoke condensing plate and the rear wall plate of the fume collecting hood.

According to the range hood provided by the embodiment of the invention, the oil content of the oil smoke flowing to the air inlet of the fan is reduced due to the arrangement of the oil smoke condensing plate in the smoke collecting cavity, so that the speed of accumulating oil stains on the fan is reduced, the cleanliness of the range hood is ensured, and the use satisfaction of customers is improved.

In some embodiments, the angle between the fume condensation plate and the horizontal plane along the front-rear direction of the fume collecting hood is a1, and a1 satisfies the relation: a1 is more than or equal to 20 degrees and less than or equal to 60 degrees.

In some embodiments, the number of the oil smoke condensing plates is two, the two oil smoke condensing plates are distributed at intervals along the up-down direction of the smoke collecting cavity, the distance between the two oil smoke condensing plates is L1, and the L1 satisfies the relation: l1 is more than or equal to 5mm and less than or equal to 50mm.

In some more specific embodiments, each of the oil fume condensation plates is provided with a plurality of air passing holes which are distributed at intervals along the left-right direction of the fume collecting cavity, each air passing hole is formed into a strip shape extending along the front-back direction of the fume collecting hood, and the plurality of air passing holes on the two oil fume condensation plates are distributed in a staggered manner along the left-right direction of the fume collecting cavity.

In some embodiments, each of the through-air holes has a width b1 and a length L1, and the distance between two adjacent through-air holes on the same oil smoke condensing plate is d1, where b1, L2, d1 satisfy the relationship: d1 is more than or equal to 4mm and less than or equal to 15mm; l2/b1 is more than or equal to 2 and less than or equal to 10.

In some embodiments, the range hood further comprises: the central guide plate is arranged in the fume collecting hood, the front end of the central guide plate is connected with the front wall plate of the fume collecting hood and is obliquely arranged upwards in the backward direction, and the rear end of the central guide plate and the front end of the fume condensing plate are provided with a second gap.

In some specific embodiments, the rear end of the central baffle is higher than the front end of the oil fume condensation plate, the vertical distance between the rear end of the central baffle and the oil fume condensation plate is L3, and L3 satisfies the relation: l3 is more than or equal to 40mm.

In some more specific embodiments, the projection of the central baffle on the horizontal plane and the projection of the fume condensing plate on the horizontal plane have a superposition area, the superposition area is long-strip-shaped and extends along the length direction of the fume collecting hood, and the width of the superposition area is b2, and b2 satisfies the relation: b2 is more than 0mm and less than or equal to 20mm.

In some embodiments, the first gap has a width d2, d2 satisfying the relationship: d2 is more than or equal to 35mm and less than or equal to 40mm.

In some embodiments, the range hood further comprises a condensing grille, wherein ventilation holes for collecting oil smoke are formed in the condensing grille, and the condensing grille is arranged on a wall plate, far away from the fan cover, of the fume collecting hood and is obliquely arranged in a backward direction.

In some specific embodiments, the lower end of the rear wall plate of the fume collecting hood is provided with a first flange extending forwards, the rear end of the condensing grille is provided with a second flange extending downwards, a third gap is arranged between the first flange and the second flange, and the oil collecting cup is located below the third gap.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an internal structural view of a range hood according to an embodiment of the present invention.

Fig. 2 is an internal structural view of another angle of the range hood according to the embodiment of the present invention.

Fig. 3 is a further angular internal block diagram of an embodiment of the present invention.

Fig. 4 is a schematic structural view of a lampblack condensing plate according to an embodiment of the invention.

Reference numerals:

a smoke exhaust ventilator 1,

A fan housing 10, a fan chamber 110,

A smoke collecting cover 20, a smoke collecting cavity 210, a first flanging 220,

Front noise reduction plate 30a, front noise reduction cavity 310a,

Rear noise reduction plate 30b, rear noise reduction cavity 310b,

A central baffle 40a, grid holes 410a,

Splitter plate 40b, grid strips 410b,

Left noise reduction plate 50a, left noise reduction cavity 510a,

Right noise reduction plate 50b, right noise reduction cavity 510b,

A fume condensing plate 60, a wind passing hole 610,

The condensing grill 70, the first ventilation holes 710, the second ventilation holes 720, the second flanges 730,

Fan 80, air intake 810.

And an oil collection cup 90.

A first gap 100a, a second gap 100b, and a third gap 100c.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being 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 invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically 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 above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

A range hood 1 according to an embodiment of the present invention is described below with reference to fig. 1 to 4.

As shown in fig. 1-2, the range hood 1 according to an embodiment of the present invention includes a fan housing 10, a fume collecting hood 20, at least one fume condensing plate 60, and a fume collecting cup 90. The fan housing 10 defines a fan cavity 110, a fan 80 is arranged in the fan cavity 110, the fan 80 comprises an air inlet 810 which is opened backwards, the fume collecting hood 20 is positioned below the fan housing 10 and defines a fume collecting cavity 210 communicated with the fan cavity 110, the fume condensing plate 60 is arranged in the fume collecting cavity 210, the fume condensing plate 60 is obliquely arranged towards the downward direction in the backward direction, the fume condensing plate 60 is provided with a through air hole 610, the oil collecting cup 90 is positioned below the fume collecting hood 20 and is connected with a rear wall plate of the fume collecting hood 20, and the oil collecting cup 90 is used for collecting condensed oil. The hood condensation plate 60 is disposed adjacent the rear wall of the hood 20 with a first gap 100a therebetween with the rear wall of the hood 20.

It will be appreciated that, since the air inlet 810 of the blower 80 is disposed rearwardly, and the hood condensation plate 60 within the hood 20 is located adjacent the rear wall of the hood 20, the flow of cooking fumes into the hood chamber 210 will enter the blower chamber 110 through the air passage 610 in the hood condensation plate 60. Condensation can occur when the oil smoke air flow contacts the oil smoke condensing plate 60 in the process, so that the oil content of the oil smoke air flow flowing to the air inlet 810 of the fan 80 is reduced, the speed of accumulating oil stains on the fan 80 is reduced, and the cleaning degree of the range hood 1 is ensured. Since the oil soot condensing plate 60 is disposed obliquely downward in the backward direction, it is possible to cause condensed oil droplets to slide along the oil soot condensing plate 60 toward the rear end so as to slide into the oil collecting cup 90 through the first gap 100a. In addition, when the condensed oil drops generated at the air inlet 810 of the fan 80 fall onto the oil fume condensing plate 60, the condensed oil drops can conveniently slide into the oil collecting cup 90, so that the possibility that the oil drops fall onto a cooking bench is reduced.

According to the range hood 1 provided by the embodiment of the invention, the oil content of the oil smoke flowing to the air inlet 810 of the fan 80 is reduced due to the arrangement of the oil smoke condensing plate 60 in the smoke collecting cavity 210, so that the speed of accumulating oil stains by the fan 80 is reduced, the cleanliness of the range hood 1 is ensured, and the use satisfaction of customers is improved.

In some embodiments, the angle between the hood condensing plate 60 and the horizontal plane along the front-to-rear direction of the hood 20 is a1, a1 satisfying the relationship: a1 is more than or equal to 20 degrees and less than or equal to 60 degrees. It will be appreciated that an excessive or too small angle between the oil and smoke condensing plate 60 and the horizontal plane will affect the effect of oil droplets generated by condensation of the oil and smoke flow sliding along the oil and smoke condensing plate 60 and into the oil collection cup 90. When the included angle between the oil fume condensing plate 60 and the horizontal plane is within the range of 20-60 degrees, the oil fume condensing plate 60 has a good oil drop guiding effect, so that the possibility that oil drops drop on a cooking bench is reduced, and the use satisfaction of customers is improved. Of course, it should be noted that, the value of the angle a1 between the fume condensation plate 60 and the horizontal plane along the front-rear direction of the fume collecting hood 20 is not limited to the above, and the angle a1 may be specifically adjusted according to the actual situation and is not necessarily limited to the above range.

In some embodiments, the number of the oil smoke condensing plates 60 is two, the two oil smoke condensing plates 60 are distributed at intervals along the up-down direction of the smoke collecting cavity 210, the distance between the two oil smoke condensing plates 60 is L1, and the L1 satisfies the relation: l1 is more than or equal to 5mm and less than or equal to 50mm. It will be appreciated that too small a distance between the two condensation plates 60 increases the difficulty of installation and the condensation effect cannot be ensured, and too large a distance results in a large height of the fume collecting chamber 210, thereby increasing the size of the whole range hood 1. In the embodiment of the invention, the distance between the two oil fume condensing plates 60 is controlled to be 5-50 mm, so that the condensing effect can be ensured, the installation difficulty is reduced, and the size of the range hood 1 can be controlled, thereby controlling the production cost. Of course, in other embodiments of the present invention, the range of values of L1 is not limited to the above range, and may be specifically adjusted according to actual needs.

In some more specific embodiments, a plurality of air passing holes 610 are formed on each of the oil smoke condensing plates 60 at intervals along the left-right direction of the smoke collecting chamber 210, each air passing hole 610 is formed in a long strip shape extending along the front-rear direction of the smoke collecting hood 20, and the plurality of air passing holes 610 on two oil smoke condensing plates 60 are staggered in the left-right direction of the smoke collecting chamber 210. It can be understood that the plurality of air passing holes 610 are formed on the two fume condensing plates 60, so that the condensing effect on the fume air flow is ensured, and meanwhile, the fume flow velocity in the fume collecting cavity 210 is also ensured, thereby ensuring the fume sucking efficiency of the range hood 1. In addition, the plurality of multi-wind holes on the two oil smoke condensing plates 60 are staggered in the left-right direction, so that the contact area between the oil smoke air flow and the oil smoke condensing plates 60 can be increased, and the condensing effect on the oil smoke air flow is improved to a certain extent.

It should be noted that the foregoing elongated shape may be rectangular, oblong, oval, oblong, or the like. Of course, in other embodiments of the present invention, the wind through hole 610 may be formed in other shapes, which are not illustrated herein.

In some embodiments, each of the through-air holes 610 has a width b1 and a length L2, and the distance between two adjacent through-air holes 610 on the same oil smoke condensing plate 60 is d1, where b1, L1, d1 satisfy the relationship: d1 is more than or equal to 4mm and less than or equal to 15mm; l2/b1 is more than or equal to 2 and less than or equal to 10. The above-mentioned limitation of the size range of the ventilation hole 610 is merely a preferred choice for ensuring ventilation effect and condensation effect, and is not strictly limited. That is, in other embodiments of the present invention, the above-mentioned size of the wind passing hole 610 may be adjusted accordingly according to the actual situation.

In some embodiments, as shown in fig. 2-3, the range hood 1 further includes a central baffle 40a, the central baffle 40a is disposed in the fume collecting hood 20, a front end of the central baffle 40a is connected to a front wall plate of the fume collecting hood 20 and is disposed obliquely upward in a rearward direction, and a rear end of the central baffle 40a has a second gap 100b with a front end of the fume condensing plate 60.

It can be appreciated that after the oil smoke enters the smoke collecting cavity 210 from the oil smoke inlet, the oil smoke is directed to the rear side of the fan cavity 110 due to the guiding effect of the central guiding plate 40a, so that most of the oil smoke enters the fan 80 through the air inlet 810 of the fan 80, which is beneficial to the fan 80 to discharge a large amount of oil smoke, and the phenomenon that the oil smoke is accumulated in the fan cavity 110 due to the increase of vortex generated between the volute of the fan 80 and the fan cover 10 by the oil smoke is avoided, so that the oil absorption efficiency of the range hood 1 is reduced. Meanwhile, the oil smoke air flow contacts the central guide plate 40a before entering the fan 80, and the central guide plate 40a can be used for condensing the oil smoke air flow, so that the condensed oil drops slide down, and the filtering effect on the oil smoke air flow is effectively improved.

In addition, the second gap 100b is arranged between the oil smoke condensing plate 60 and the central guide plate 40a, so that the oil smoke can pass through the second gap 100b to enter the fan cavity 110 under the guide action of the central guide plate 40a, and the accumulation of the oil smoke in the smoke collecting cavity 210 is avoided, so that the smoke exhausting efficiency of the range hood 1 is ensured. Here, the second gap 100b may be a gap along the vertical direction of the fume collecting hood 20, or may be a gap along the front-rear direction of the fume collecting hood 20. That is, the front end of the condensation plate 60 and the rear end of the central partition plate may or may not be on the same plane.

In some specific embodiments, as shown in fig. 2, the rear end of the central baffle 40a is higher than the front end of the oil smoke condensing plate 60, and the vertical distance between the rear end of the central baffle 40a and the oil smoke condensing plate 60 is L2, where L2 satisfies the relationship: l2 is more than or equal to 40mm. Therefore, the fume can be ensured to pass through the second gap 100b to enter the fan cavity 110 under the guiding action of the central guide plate 40a, and the fume is prevented from accumulating in the fume collecting cavity 210, so that the fume exhausting efficiency of the range hood 1 is ensured. Of course, the larger the range of L2 is, the more can the oil smoke air flow be guaranteed to flow into the fan cavity 110 stably, but the larger the value of L2 is, the volume of the range hood 1 is increased to a certain extent, and the production cost of the range hood 1 is increased. Therefore, L2 can be controlled within a range of 40mm or more to ensure the flow of the oil smoke entering the fan cavity 110, and the maximum range of L2 can be selected according to actual needs, which is not limited herein.

In some more specific embodiments, the projection of the central baffle 40a onto the horizontal plane has an overlap area with the projection of the oil soot condensing plate 60 onto the horizontal plane. It will be appreciated that if the projection of the central baffle 40a on the horizontal plane does not overlap with the projection of the oil smoke condensing plate 60 on the horizontal plane, that is, a portion of the oil smoke flow in the smoke collecting chamber 210 may directly enter the fan chamber 110 without contacting the oil smoke condensing plate 60 or the central baffle 40a, and this portion of the air flow does not pass through the central baffle 40a or the condensation of the oil smoke condensing plate 60, the filtering effect of the range hood 1 is reduced, and the adhesion of oil stains on the fan 80 is increased. In the embodiment of the invention, the projection of the central guide plate 40a on the horizontal plane and the projection of the oil smoke condensing plate 60 on the horizontal plane have overlapping areas, so that the oil smoke air flow entering the fume collecting hood 20 can be always condensed by the central guide plate 40a or the oil smoke condensing plate 60, the filtering effect of the range hood 1 is ensured, and the oil stain adhesion on the fan 80 is reduced.

Optionally, the overlapping area is elongated and extends along the length direction of the fume collecting hood 20, and the width of the overlapping area is b2, where b2 satisfies the relation: b2 is more than 0mm and less than or equal to 20mm. Of course, it should be noted that the above description of the overlapping area is merely illustrative, and not limiting, and in other embodiments of the present invention, the overlapping area may be formed in an oblong, oval, or other irregular shape, and is not limited to the above shape and size.

In some embodiments, the width of the first gap 100a is d2, d2 satisfying the relationship: d2 is more than or equal to 35mm and less than or equal to 40mm. It will be appreciated that too large a width of the first gap 100a may cause the soot formed by condensing the soot air flow to slide into the oil collecting cup 90 when sliding along the soot condensing plate 60 to the rear end thereof, and too small a width of the first gap 100a may cause the soot condensing plate 60 to be mounted more inconveniently. Therefore, the width of the first gap 100a is controlled to be 35mm-40mm, so that when the oil smoke formed by condensing the oil smoke air flow slides to the rear end of the oil smoke condensing plate 60 along the oil smoke condensing plate 60, the oil smoke can stably slide into the oil collecting cup 90, and the oil smoke condensing plate 60 can be conveniently installed. Of course, the width of the first gap 100a may be adaptively adjusted according to practical situations and is not limited to the above-mentioned range.

In some embodiments, as shown in fig. 3, the range hood 1 further includes a condensing grill 70, where ventilation holes are formed in the condensing grill 70, and the condensing grill 70 is provided on a wall plate of the fume collecting hood 20 away from the fan guard 10 and is inclined downward in a rearward direction. It will be appreciated that when the range hood is in operation, after the oil smoke passes through the condensation grille 70, the oil mist is condensed into oil droplets by the condensation grille 70, the oil droplets can slide along the condensation grille 70 to enter the oil collecting cup 90 of the range hood 1, and the smoke enters the fan housing 10 through the interior of the smoke collecting hood 20 and is discharged outdoors under the drive of the fan 80. The fume flow can enter the fume collecting hood 20 through the ventilation holes, so that the area of the condensing grille 70 for absorbing fume is increased, and the negative pressure generated at the condensing grille 70 when the fan 80 rotates is larger, so that the fume absorbing effect of the fume exhauster 1 is increased. Meanwhile, the condensing grill 70 is formed on a wall plate of the fume collecting hood 20 far away from the fan cover 10, and the condensing grill 70 is formed in a structure protruding toward the fan cover 10, so that the overall size of the fume collecting hood 20 is reduced, the phenomenon that the head of a user is easy to collide with the fume collecting hood 20 in the conventional fume exhauster 1 is avoided, and the practical safety of the fume exhauster 1 is improved.

In some specific embodiments, as shown in FIG. 3, the condensing grill 70 includes a top wall and a plurality of side walls disposed around the top wall, each of the top wall and the side walls having elongated ventilation holes. For convenience of description, the ventilation holes provided on the top wall are referred to as first ventilation holes 710, the ventilation holes provided on the side wall are referred to as second ventilation holes 720, and the extension directions of the first ventilation holes 710 and the second ventilation holes 720 are perpendicular. It can be appreciated that, since the first ventilation holes 710 and the second ventilation holes 720 are perpendicular to each other, and the first ventilation holes 710 are provided on the top wall and the second ventilation holes 720 are provided on the side wall, the lengths of the first ventilation holes 710 and the second ventilation holes 720 are inconsistent, thus reducing the noise of the flue gas passing through the ventilation holes to vibrate the condensing grill 70, and improving the comfort level of the user.

It should be noted that the foregoing strip may be rectangular, may be oblong with semicircular ends, may be a relatively flat oval, and is not limited to a specific shape.

In some specific embodiments, as shown in fig. 2, the lower end of the rear wall plate of the fume collecting hood 20 is provided with a first flange 220 extending forward, the rear end of the condensing grill 70 is provided with a second flange 730 extending downward, a third gap 100c is spaced between the first flange 220 and the second flange 730, and the oil collecting cup 90 is located below the third gap 100c. Thus, both the oil droplets resulting from condensation as the flow of oil and smoke passes through the condensing grill 70 and the oil droplets dripping from the upper fan 80 can be more easily directed into the oil collection cup 90.

In some embodiments, the left and right ends of the hood condensation plate 60 are connected to the left and right inner walls of the hood 20, respectively. Therefore, the connection stability of the oil smoke condensing plate 60 can be ensured, and the phenomenon that the oil smoke condensing plate 60 vibrates under the driving of oil smoke air flow so as to increase the working noise of the range hood 1 is avoided.

In some embodiments, as shown in fig. 2-3, the range hood 1 further includes a splitter plate 40b, where the splitter plate 40b is disposed corresponding to the air inlet 810 of the fan 80, and the splitter plate 40b includes a plurality of grid strips 410b, and two ends of each grid strip 410b are respectively connected to the side wall of the fan housing 10, and the plurality of grid strips 410b are spaced along the up-down direction of the fan housing 10.

It can be appreciated that the split plate 40b adopts a grid structure and is arranged corresponding to the air inlet 810 of the fan 80, so that the oil smoke entering the fan 80 is relatively uniform and stable, and the output airflow of the fan 80 is ensured to a certain extent, thereby ensuring the oil smoke exhausting effect of the range hood 1. Meanwhile, the contact area of the flow dividing plate 40b and the lampblack airflow is increased by the adoption of the grid structure of the flow dividing plate 40b, so that the condensation effect of the flow dividing plate 40b on the lampblack airflow is improved, and the filtering effect of the range hood 1 is improved. In addition, the grill structure is also advantageous in absorbing noise generated when the blower 80 rotates, thereby reducing the operating noise of the range hood 1.

In some embodiments, as shown in fig. 3, the range hood 1 further includes left and right noise reduction plates 50a and 50b spaced apart in the left-right direction of the smoke collecting hood 20, and ventilation holes are provided between the left and right noise reduction plates 50a and 50b. It will be appreciated that the left noise reduction plate 50a and the inner peripheral wall of the fume collecting hood 20 may define a left noise reduction cavity 510a, and the right noise reduction plate 50b and the inner peripheral wall of the fume collecting hood 20 define a right noise reduction cavity 510b, so that the working noise of the range hood 1 can be further reduced.

In some specific embodiments, as shown in FIG. 3, the contour edges of the left noise reduction plate 50a are each connected to the inner peripheral wall of the fume collection hood 20, and the contour edges of the right noise reduction plate 50b are each connected to the inner peripheral wall of the fume collection hood 20. It will be appreciated that the contour edge of the left noise reduction plate 50a is connected with the inner peripheral wall of the fume collecting hood 20, that is, the left noise reduction cavity 510a is formed as a relatively closed cavity, so that the noise reduction effect of the left noise reduction cavity 510a can be improved, and the phenomenon that the fume flow directly enters the left noise reduction cavity 510a to reduce the fume extraction effect of the fume exhauster 1 is avoided. The same effect is obtained by connecting the contour edge of the right noise reduction plate 50b with the inner circumferential wall of the fume collecting hood 20, and the description thereof will be omitted. Of course, in some embodiments of the present invention, the left and right noise reduction plates 50a and 50b may be connected to the inner peripheral wall of the smoke collecting hood 20 on only one side.

In some more specific embodiments, as shown in fig. 3, the left and right noise reduction plates 50a, 50b extend in a downward direction toward a direction away from each other. It will be appreciated that since the left and right noise reduction plates 50a and 50b extend in a downward direction in a direction away from each other, the flow of cooking fumes enters the fan chamber 110 to gather under the action of the left and right noise reduction plates 50a and 50b, thereby further improving the smoke extraction effect of the range hood 1.

It should be noted that, when the range hood 1 includes the left and right noise reduction plates 50a and 50b, the left and right sides of the oil smoke condensing plate 60 may be connected to the left and right noise reduction plates 50a and 50b, respectively. Thus, the stability of the hood condensing plate 60 can be further improved, and the operation noise of the range hood 1 can be suppressed.

In some embodiments, as shown in fig. 1-2, the range hood 1 further includes a front noise reduction plate 30a and a rear noise reduction plate 30b, the front noise reduction plate 30a is disposed in the fan chamber 110 and located at an axial front side of the fan 80, the rear noise reduction plate 30b is disposed in the fan chamber 110 and located at an axial rear side of the fan 80, and the front noise reduction plate 30a and the rear noise reduction plate 30b are each formed as a flat plate extending in a radial direction of the fan 80.

It will be appreciated that since the front noise reduction plate 30a and the rear noise reduction plate 30b are respectively disposed at the axial front side and the axial rear side of the blower 80 inside the blower cavity 110, the outward radiation noise of the blower 80 during rotation is attenuated by the front noise reduction plate 30a and the rear noise reduction plate 30b, thereby reducing the noise generated during rotation of the blower 80. Meanwhile, the front noise reduction plate 30a and the rear noise reduction plate 30b can also reduce noise generated by the flow of the oil smoke flowing in the fan chamber 110 to some extent. In addition, the front and rear noise reduction plates 30a and 30b are formed as flat plates extending in the radial direction of the blower 80, which can secure the attenuation ability of noise to some extent, further reducing the operating noise of the range hood 1.

It is emphasized here that the front noise reduction plate 30a and the rear noise reduction plate 30b are formed in a flat plate shape, only that surfaces of the front noise reduction plate 30a and the rear noise reduction plate 30b facing the blower 80 are indicated as being flat, and the shapes of the front noise reduction plate 30a and the rear noise reduction plate 30b are not particularly limited. That is, in the embodiment of the present invention, the front noise reduction plate 30a and the rear noise reduction plate 30b may be formed in various shapes such as a circle, a rectangle, a fan, and the like.

In some embodiments, as shown in fig. 1, the upper end of the front noise reduction plate 30a is connected to the upper wall plate of the fan housing 10, and the lower end of the front noise reduction plate 30a is connected to the front wall surface of the fan housing 10 through a flange, and a front noise reduction cavity 310a is defined between the flange, the front noise reduction plate 30a, the upper wall plate of the fan housing 10, and the front wall plate of the fan housing 10. It can be appreciated that the upper end and the lower end of the front noise reduction plate 30a are connected with the wall plate of the fan cover 10, so that the connection stability of the front noise reduction plate 30a can be ensured, the vibration noise generated by the front noise reduction plate 30a under the action of the lampblack airflow is reduced, and the working noise of the range hood 1 is reduced to a certain extent. In addition, since the front noise reduction chamber 310a is formed between the front noise reduction plate 30a and the fan housing 10, the operation noise of the fan 80 is better attenuated, thereby reducing the operation noise of the range hood 1 and improving the customer experience.

In some embodiments, as shown in fig. 1, the upper end of the rear noise reduction plate 30b is connected to the upper wall plate of the fan housing 10, and the lower end of the rear noise reduction plate 30b is connected to the rear wall surface of the fan housing 10 through a flange, and a rear noise reduction cavity 310b is defined between the flange, the rear noise reduction plate 30b, the upper wall plate of the fan housing 10, and the rear wall plate of the fan housing 10. It can be understood that the upper end and the lower end of the rear noise reduction plate 30b are connected with the wall plate of the fan cover 10, so that the connection stability of the rear noise reduction plate 30b can be ensured, the vibration noise generated by the rear noise reduction plate 30b under the action of the lampblack airflow is reduced, and the working noise of the range hood 1 is reduced to a certain extent. In addition, since the rear noise reduction chamber 310b is formed between the rear noise reduction plate 30b and the fan housing 10, the operation noise of the fan 80 is better attenuated, thereby reducing the operation noise of the range hood 1 and improving the customer experience.

Examples:

the range hood 1 of the present embodiment includes a fan housing 10, a smoke collecting hood 20, two smoke condensing plates 60, a front noise reduction plate 30a, a rear noise reduction plate 30b, a center baffle 40a, a flow dividing plate 40b, a left noise reduction plate 50a, and a right noise reduction plate 50b. The fan housing 10 defines a fan cavity 110, a fan 80 is arranged in the fan cavity 110, the fume collecting hood 20 is arranged below the fan housing 10, and a fume collecting cavity 210 communicated with the fan cavity 110 is defined, and the fume collecting cavity 210 is provided with a fume inlet.

The two oil smoke condensing plates 60 are distributed at intervals along the up-down direction of the smoke collecting cavity 210, the distance between the two oil smoke condensing plates 60 is L1, and the L1 satisfies the relation: l1 is more than or equal to 5mm and less than or equal to 50mm. Each of the oil smoke condensing plates 60 is provided with a plurality of air passing holes 610 spaced apart in the left-right direction of the smoke collecting chamber 210, each air passing hole 610 is formed in a long strip shape extending in the front-rear direction of the smoke collecting hood 20, and the plurality of air passing holes 610 on the two oil smoke condensing plates 60 are staggered in the left-right direction of the smoke collecting chamber 210. Each of the air passing holes 610 has a width b1 and a length L2, and the distance between two adjacent air passing holes 610 on the same oil smoke condensing plate 60 is d1, and b1, L2, d1 satisfy the relation: d1 is more than or equal to 4mm and less than or equal to 15mm; l2/b1 is more than or equal to 2 and less than or equal to 10.

The central baffle 40a is disposed in the fume collecting hood 20, the front end of the central baffle 40a is connected to the front wall plate of the fume collecting hood 20 and is disposed obliquely upward in the backward direction, and the rear end of the central baffle 40a and the front end of the fume condensing plate 60 have a second gap 100b. The center baffle 40a has a grill hole 410a provided near an end thereof connected to the inner wall surface of the fan housing 10. The rear end of the central guide plate 40a is higher than the front end of the oil smoke condensing plate 60, the vertical distance between the rear end of the central guide plate 40a and the oil smoke condensing plate 60 is L2, and the relation L2 is more than or equal to 40mm. The projection of the central baffle 40a on the horizontal plane has an overlapping area with the projection of the oil soot condensing plate 60 on the horizontal plane. The overlapping area is long-strip-shaped and extends along the length direction of the fume collecting hood 20, the width of the overlapping area is b2, and the relation is satisfied: b2 is more than 0mm and less than or equal to 20mm.

The left and right noise reduction plates 50a and 50b are disposed inside the fume collecting hood 20 and are spaced apart in the left-right direction, and the fume inlet is located between the left and right noise reduction plates 50a and 50b. The contour edges of the left noise reduction plates 50a are connected with the inner peripheral wall of the fume collecting hood 20, and the contour edges of the right noise reduction plates 50b are connected with the inner peripheral wall of the fume collecting hood 20. The left and right noise reduction plates 50a and 50b extend in a downward direction toward a direction away from each other.

The front noise reduction plate 30a is disposed in the fan chamber 110 and is located at an axially front side of the fan 80, the rear noise reduction plate 30b is disposed in the fan chamber 110 and is located at an axially rear side of the fan 80, and the front noise reduction plate 30a and the rear noise reduction plate 30b are each formed as a flat plate extending in a radial direction of the fan 80. The upper end of the front noise reduction plate 30a is connected with the upper wall plate of the fan cover 10, the lower end of the front noise reduction plate 30a is connected with the front wall surface of the fan cover 10 through a flanging, the left end of the front noise reduction plate 30a is connected with the left wall surface of the fan cover 10, and the right end of the front noise reduction plate 30a is connected with the right wall surface of the fan cover 10. The flange, the front noise reduction plate 30a, the upper wall plate of the fan housing 10, and the front wall plate of the fan housing 10 define a front noise reduction chamber 310a therebetween. The flange is below the lowermost end of the volute of blower 80. The upper end of the rear noise reduction plate 30b is connected with the upper wall plate of the fan cover 10, the lower end of the rear noise reduction plate 30b is connected with the rear wall surface of the fan cover 10 through a flanging, the left end of the rear noise reduction plate 30b is connected with the left wall surface of the fan cover 10, and the right end of the rear noise reduction plate 30b is connected with the right wall surface of the fan cover 10. The flange, rear noise reduction plate 30b, upper wall plate of the fan housing 10 and rear wall plate of the fan housing 10 define a rear noise reduction cavity 310b therebetween. The flange is below the lowermost end of the volute of blower 80.

The condensing grill 70 is provided on a wall plate of the fume collecting hood 20 remote from the fan housing 10, and is inclined downward in a rearward direction. The condensing grill 70 is provided with a plurality of ventilation holes extending in the front-rear direction of the fume collecting hood 20 to constitute the fume inlet. The condensing grill 70 is formed in a convex structure toward the fan housing 10 and includes a top wall and a plurality of side walls disposed around the top wall, a first ventilation hole 710 is provided on the top wall, and second ventilation holes 720 are provided on the left and right side walls, and an extension direction of the second ventilation holes 720 is perpendicular to an extension direction of the first ventilation holes 710.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A range hood, comprising:

the fan cover is used for limiting a fan cavity, a fan is arranged in the fan cavity, and the fan comprises an air inlet which is opened backwards;

the fume collecting hood is positioned below the fan cover and is used for limiting a fume collecting cavity communicated with the fan cavity;

the oil smoke condensing plate is arranged in the smoke collecting cavity, is obliquely arranged towards the lower side in the backward direction, and is provided with a wind through hole;

the oil collecting cup is positioned below the fume collecting hood and connected with the rear wall plate of the fume collecting hood, and is used for collecting condensed oil; wherein:

the oil smoke condensing plate is arranged close to the rear wall plate of the fume collecting hood, and a first gap is formed between the oil smoke condensing plate and the rear wall plate of the fume collecting hood;

the central guide plate is arranged in the fume collecting hood, the front end of the central guide plate is connected with the front wall plate of the fume collecting hood and is obliquely arranged upwards in the backward direction, and a second gap is reserved between the rear end of the central guide plate and the front end of the fume condensing plate;

the splitter plate is arranged corresponding to the air inlet of the fan and comprises a plurality of grid bars, two ends of each grid bar are respectively connected with the side wall of the fan cover, and the grid bars are distributed at intervals along the upper and lower directions of the fan cover.

2. The range hood of claim 1, wherein an angle between the hood condensing plate and a horizontal plane along a front-to-rear direction of the hood is a1, and a1 satisfies the relationship: a1 is more than or equal to 20 degrees and less than or equal to 60 degrees.

3. The range hood of claim 1, wherein the number of the oil fume condensing plates is two, the two oil fume condensing plates are distributed at intervals along the up-down direction of the fume collecting cavity, the distance between the two oil fume condensing plates is L1, and the L1 satisfies the relation: l1 is more than or equal to 5mm and less than or equal to 50mm.

4. The range hood according to claim 3, wherein a plurality of the air passing holes are formed in each of the oil fume condensation plates at intervals along the left-right direction of the fume collecting chamber, each of the air passing holes is formed in a long strip shape extending along the front-rear direction of the fume collecting hood, and the plurality of the air passing holes in the two oil fume condensation plates are staggered in the left-right direction of the fume collecting chamber.

5. A range hood according to claim 3, wherein each of the air passing holes has a width b1 and a length L1, and the distance between two adjacent air passing holes on the same oil smoke condensing plate is d1, and b1, L2, d1 satisfy the relation: d1 is more than or equal to 4mm and less than or equal to 15mm; l2/b1 is more than or equal to 2 and less than or equal to 10.

6. The range hood of claim 1 wherein the rear end of the central baffle is higher than the front end of the oil fume condensing plate, the vertical distance between the rear end of the central baffle and the oil fume condensing plate is L3, L3 satisfies the relationship: l3 is more than or equal to 40mm.

7. The range hood of claim 6, wherein the projection of the central baffle onto the horizontal plane and the projection of the hood condensation plate onto the horizontal plane have overlapping areas, the overlapping areas are elongated and extend along the length direction of the hood, and the widths of the overlapping areas are b2, b2 satisfy the relation: b2 is more than 0mm and less than or equal to 20mm.

8. The range hood of claim 1 wherein the first gap has a width d2, d2 satisfying the relationship: d2 is more than or equal to 35mm and less than or equal to 40mm.

9. The range hood according to claim 1, further comprising a condensing grill provided with ventilation holes for collecting oil smoke, the condensing grill being provided on a wall plate of the fume collecting hood away from the fan housing and being disposed to be inclined downward in a rearward direction.

10. The range hood of claim 9 wherein the lower end of the rear wall panel of the fume collection hood is provided with a first flange extending forward, the rear end of the condensing grill is provided with a second flange extending downward, a third gap is spaced between the first flange and the second flange, and the oil collection cup is positioned below the third gap.