CN111336562B

CN111336562B - Fume exhaust fan

Info

Publication number: CN111336562B
Application number: CN202010256707.4A
Authority: CN
Inventors: 宋砚波; 胡克吉
Original assignee: Hisense Guangdong Kitchen and Bath System Co Ltd
Current assignee: Hisense Guangdong Kitchen and Bath System Co Ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2021-09-28
Anticipated expiration: 2040-04-02
Also published as: CN111336562A

Abstract

The invention discloses a range hood, relates to the technical field of kitchen household appliances, and aims to solve the problem that a filter device is short in service life due to the fact that a large amount of waste oil separated by a fan system drops on the filter device. The range hood comprises a shell, a centrifugal fan, a filtering device and an oil receiving disc, wherein the filtering device and the centrifugal fan are sequentially arranged in an air duct along the flowing direction of gas, and the filtering device is positioned below the centrifugal fan; the oil receiving disc is arranged between the centrifugal fan and the filtering device, a ventilation opening is formed in the oil receiving disc, an air door is arranged at the ventilation opening, a first oil collecting tank is arranged below the first end of the air door, and the first end of the air door is rotatably connected with the first oil collecting tank through a rotating shaft; when the centrifugal fan is closed, the air door rotates to a closed position, and the air door closes the ventilation opening; when the centrifugal fan is started, the air door rotates to the opening position, the air door opens the ventilation opening, and one end, far away from the rotating shaft, of the air door is located above the ventilation opening. The invention is used for kitchen environment purification.

Description

Fume exhaust fan

Technical Field

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

Background

With the continuous improvement of the daily living standard of people, the requirements of consumers on living environment and consumer goods are higher and higher. The range hood is a kitchen appliance for purifying the kitchen environment, is arranged above a kitchen stove, and can quickly pump away waste burnt by the stove and oil smoke harmful to human bodies generated in the cooking process, discharge the waste and the oil smoke out of a room, reduce indoor air pollution and purify air.

At present, in the existing application technology, a fan system and an oil filter screen are arranged in a range hood, and the oil filter screen is positioned below the fan system; wherein, the fan system is centrifugal fan system, can separate the oil smoke through the effect of centrifugal force, uses adsorption material such as active carbon to purify the oil smoke in the oil cleaner screen usually.

However, in the use process of the range hood, the oil smoke separated by the fan system can be accumulated to form a large amount of waste oil, and when the range hood is closed, a large amount of waste oil can drip into the oil filter screen, so that the service life of the oil filter screen is short.

Disclosure of Invention

The invention provides a range hood, which aims to solve the problem that a large amount of waste oil separated by a fan system drops on a filtering device to cause the service life of the filtering device to be short.

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

a kind of cooker hood, including body, centrifugal fan and filter equipment, there are aspiration entry and air exit on the body, form the wind channel between aspiration entry and air exit, along the flow direction of the gas, filter equipment, centrifugal fan are set up in the wind channel sequentially, and the filter equipment locates below the centrifugal fan; the centrifugal fan is arranged in the oil receiving disc, the centrifugal fan is connected with the filtering device through a rotating shaft, the oil receiving disc is arranged between the centrifugal fan and the filtering device, a ventilation opening is formed in the oil receiving disc, an air door is arranged at the ventilation opening, a first oil collecting tank is arranged below the first end of the air door, and the first end of the air door is rotatably connected with the first oil collecting tank through the rotating shaft; when the centrifugal fan is closed, the air door rotates to a closed position, and the air vent is closed by the air door; when the centrifugal fan is started, the air door rotates to the opening position, and airflow introduced by the centrifugal fan passes through the filtering device, the ventilation opening and the centrifugal fan in sequence and then is sent out through the air outlet.

The range hood provided by the embodiment of the invention comprises a centrifugal fan, a filtering device and an oil receiving disc, wherein the centrifugal fan, the oil receiving disc and the filtering device are sequentially arranged in an air duct from top to bottom. Wherein, connect to be equipped with the vent on the food tray, vent department is equipped with the air door, and the below of the first end of air door is equipped with first oil trap, and the first end of air door is connected with first oil trap rotation through the pivot. In this case, when the centrifugal fan is closed, the damper is rotated to the closed position, so that the vent is closed by the damper; in this way, a large amount of waste oil formed by the accumulated oil fume separated by the centrifugal fan can drop on the oil receiving disc. When the centrifugal fan is started again, the air door rotates to the open position, one end of the air door, which is far away from the rotating shaft, is positioned above the ventilation opening, waste oil on the air door can drip into the first oil collecting tank along the air door, and air flow introduced by the centrifugal fan is sent out through the air outlet after sequentially passing through the filtering device, the ventilation opening and the centrifugal fan; in this way, the air mixed with oil smoke in the kitchen can be sucked into the range hood and is sent out through the air outlet after sequentially passing through the filtering device, the ventilation opening and the centrifugal fan. Compared with the prior art, the range hood provided by the embodiment of the invention is provided with the oil receiving disc between the centrifugal fan and the filtering device, when the range hood is closed, a large amount of waste oil can drip on the air door on the oil receiving disc in a closed state, and when the centrifugal fan is started again, the waste oil on the air door can drip into the first oil collecting tank along the air door.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a range hood according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an oil pan of a range hood according to an embodiment of the present invention;

FIG. 3 is a partially enlarged view of an oil pan of the range hood according to the embodiment of the present invention;

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a schematic structural view of an oil pan of a range hood according to an embodiment of the present invention in an open state;

fig. 6 is a schematic structural diagram of a range hood according to an embodiment of the present invention when an oil receiving pan is in a closed state.

Reference numerals:

1-a shell; 11-a box body; 12-a smoke collecting hood; 2-a filtration device; 3-a centrifugal fan; 4-an air duct; 5-an oil receiving disc; 51-a vent; 52-a damper; 53-a rotating shaft; 54-a first oil sump; 55-second oil sump.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to 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 those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" 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 defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. They may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The embodiment of the invention provides a range hood, as shown in fig. 1, 5 and 6, comprising a shell 1, a centrifugal fan 3 and a filtering device 2, wherein the shell 1 is provided with an air suction opening and an air exhaust opening, an air duct 4 is formed between the air suction opening and the air exhaust opening, the filtering device 2 and the centrifugal fan 3 are sequentially arranged in the air duct 4 along the flowing direction of air, and the filtering device 2 is positioned below the centrifugal fan 3; the centrifugal fan filter is characterized by further comprising an oil receiving disc 5, wherein the oil receiving disc 5 is arranged between the centrifugal fan 3 and the filter device 2, a vent 51 is arranged on the oil receiving disc 5, an air door 52 is arranged at the vent 51, a first oil collecting groove 54 is arranged below the first end of the air door 52, and the first end of the air door 52 is rotatably connected with the first oil collecting groove 54 through a rotating shaft 53; wherein, when the centrifugal fan 3 is closed, the damper 52 is rotated to the closed position, and the vent 51 is closed by the damper 52; when the centrifugal fan 3 is started, the damper 52 is rotated to the open position, and the airflow introduced by the centrifugal fan 3 passes through the filter device 2, the vent 51, and the centrifugal fan 3 in sequence and then is discharged from the air outlet.

The range hood according to the embodiment of the invention, as shown in fig. 1, 5 and 6, includes a centrifugal fan 3, a filtering device 2 and an oil receiving tray 5, wherein the centrifugal fan 3, the oil receiving tray 5 and the filtering device 2 are sequentially arranged in an air duct 4 from top to bottom. Wherein, the oil receiving disc 5 is provided with a vent 51, the vent 51 is provided with a damper 52, a first oil collecting groove 54 is arranged below the first end of the damper 52, and the first end of the damper 52 is rotatably connected with the first oil collecting groove 54 through a rotating shaft 53. In this case, when the centrifugal fan 3 is closed, the damper 52 is rotated to the closed position, so that the vent 51 is closed by the damper 52; in this case, a large amount of waste oil formed by the accumulation of the soot separated by the centrifugal fan 3 drops onto the oil receiving pan 5. When the centrifugal fan 3 is started again, the air door 52 rotates to the open position, one end of the air door 52 far away from the rotating shaft 53 is positioned above the air vent 51, waste oil on the air door 52 can drop into the first oil collecting tank 54 along the air door 52, and air flow introduced by the centrifugal fan 3 passes through the filtering device 2, the air vent 51 and the centrifugal fan 3 in sequence and then is sent out through the air outlet; in this way, the air mixed with the oil smoke in the kitchen can be sucked into the range hood, and is sent out through the air outlet after passing through the filtering device 2, the ventilation opening 51 and the centrifugal fan 3 in sequence. Compared with the prior art, the range hood provided by the embodiment of the invention is characterized in that the oil receiving disc 5 is arranged between the centrifugal fan 3 and the filtering device 2, when the range hood is closed, a large amount of waste oil can drip on the air door 52 on the oil receiving disc 5 in a closed state, and when the centrifugal fan 3 is started again, the waste oil on the air door 52 can drip into the first oil collecting tank 54 along the air door 52, so that the oil receiving disc 5 can be detached for cleaning after being used for a period of time, the waste oil is prevented from dripping on the filtering device 2, and the problem that the service life of the filtering device 2 is short due to the fact that a large amount of waste oil separated by a fan system drips on the filtering device 2 is solved.

The filter device 2 is generally a filter screen, which generally uses an adsorbing material to purify the oil smoke, and has a simple installation structure and a small occupied space. For example, this filter screen uses active carbon to purify the oil smoke, and purifying effect is better, realizes that the cost is lower.

In general, referring to fig. 1, 5 and 6, the housing 1 of the range hood includes a box 11 and a fume collecting hood 12 connected to the bottom of the box 11, the centrifugal fan 3 is disposed in the box 11, and the filtering device 2 and the oil receiving pan 5 are disposed in the fume collecting hood 12. In this case, when the centrifugal fan 3 rotates at a high speed, a certain negative pressure region is formed above the smoke collecting hood 12 to contain the oil smoke which cannot be sucked and discharged, and a buffering function is performed, so that a large amount of oil smoke is prevented from overflowing. In addition, the filtering device 2 and the oil receiving disc 5 are arranged in the fume collecting hood 12, so that the fume collecting hood is convenient to disassemble and replace and clean.

In order to ensure the air intake of the range hood and avoid the volume of the range hood from being too large, referring to fig. 1, 2 and 3, the number of the air doors 52 is multiple, and the air doors 52 are arranged in parallel. Accordingly, the number of the rotating shafts 53 and the first oil sumps 54 corresponding to the air doors 52 is plural. At this time, simultaneous opening or simultaneous closing of the plurality of ventilation openings 51 can be achieved by the common rotation of the plurality of dampers 52. In this way, under the condition of the same air inlet area, compared with the condition that one vent 51 corresponds to one air door 52, the vent 51 which divides the same air inlet area into a plurality of smaller air inlet areas corresponds to the plurality of air doors 52 with smaller areas one by one, the space required by the rotation of the air doors 52 can be reduced, the avoidance space between the centrifugal fan 3 and the oil receiving disc 5 is reduced, and the overlarge volume of the range hood is avoided; meanwhile, the driving force required by the rotation of the air door 52 is reduced, the energy consumption is lower, the air inlet and outlet of the air duct 4 are smoother, the flow speed and the flow loss are smaller, and the air flow can pass through quickly.

In some embodiments, in order to implement an automated control process, the range hood of the embodiment of the present invention further includes a controller, wherein the damper 52 and the centrifugal fan 3 are both electrically connected to the controller, and when the centrifugal fan 3 is closed, the controller controls the damper 52 to close the vent 51; when the centrifugal fan 3 is opened, the controller controls the damper 52 to open the vent 51. Under the condition, the opening and closing processes of the air door 52 do not need the action of air flow, the flow speed and the flow loss of the air flow are small, the overall wind resistance is low, the air inlet and the air outlet of the air duct 4 are smooth, the air mixed with oil smoke in a kitchen can be rapidly pumped away, and the user experience is high.

In other embodiments, in order to achieve the automatic opening and closing of the vent 51, the damper 52 is configured to be rotatable about the rotation shaft 53 under the action of the airflow generated by the centrifugal fan 3 to open the vent 51, and the damper 52 closes the vent 51 under the action of gravity when the action of the airflow is removed. Based on this, after the centrifugal fan 3 is started, a certain negative pressure area is formed in the air duct 4, air mixed with oil smoke in a kitchen is introduced into the air duct 4 to form airflow, the airflow enables the air door 52 to rotate to open the ventilation opening 51, and the ventilation opening 51 is ensured to be always in an open state under the action of continuous airflow circulation; when the centrifugal fan 3 is closed, the damper 52 naturally rotates downward by gravity to close the ventilation opening 51. As can be seen from the above, the opening and closing of the vent 51 are automatically controlled according to the start and closing of the centrifugal fan 3, without adding other components, and the structure is simple and the cost is low.

To further reduce the windage presented by the damper 52, the center of gravity of the damper 52 is located near the pivot 53. Therefore, the air door 52 can rotate under the action of small air flow, the ventilation opening 51 is further opened, the overall wind resistance is further reduced, the air inlet of the air duct 4 is smoother, the flow rate and flow loss of the air flow are smaller, the air mixed with oil smoke in a kitchen can be quickly pumped away, the indoor air pollution is reduced, the energy consumption is lower, and the operation cost is lower.

The connecting position of the rotating shaft 53 and the first oil collecting groove 54 is not exclusive, and the rotating shaft 53 may be disposed inside the first oil collecting groove 54 or disposed on a notch of the first oil collecting groove 54. The rotating shaft 53 is disposed on the notch of the first oil collecting groove 54, and the first oil collecting groove 54 occupies no space of the rotating shaft 53, so that a large amount of oil can be accumulated. In addition, the rotating shaft 53 may be disposed on the notch of the first oil collecting groove 54 and attached to the side wall of the first oil collecting groove 54; the rotating shaft 53 may be disposed on the notch of the first oil collecting groove 54 and bisects the notch of the first oil collecting groove 54. Preferably, the rotating shaft 53 is disposed on the notch of the first oil collecting groove 54, and bisects the notch of the first oil collecting groove 54, so that most of oil drops still fall into the first oil collecting groove 54 when the air door 52 rotates unstably or oil drops on the air door 52 are slightly thrown away due to other factors during the rotation of the air door 52, the risk of the waste oil dropping into the filtering device 2 is further reduced, the amount of oil dropping into the filtering device 2 is reduced, and the reliability is improved.

Further, referring to fig. 1, 3 and 4, the side wall of the first oil sump 54 parallel to the rotation shaft 53 is higher than the rotation shaft 53. In this way, during the process that the oil on the damper 52 flows downwards along the damper 52, the side wall of the portion of the first oil collecting groove 54 higher than the rotating shaft 53 can be used for temporarily blocking the oil flowing into the first oil collecting groove 54, so as to play a role of buffering, thereby preventing the oil on the damper 52 from entering the first oil collecting groove 54 too soon to overflow, and reducing the amount of oil dropping into the filter device 2.

As shown in fig. 1 and 3, the surface of the damper 52 close to the filter device 2 is convex in a direction away from the filter device 2 to form a curved surface. At this time, when the centrifugal fan 3 is closed, the air door 52 closes the vent 51, oil drops flow onto the air door 52 under the action of gravity and automatically slide into the first oil collecting groove 54 along the arc surface of the air door 52, a large amount of oil drops are not accumulated on the upper surface of the air door 52, the driving force required by the air door 52 to open the air outlet is low, the air door 52 can rotate under the action of small air flow, the vent 51 is further opened, the overall air resistance is further reduced, and the air inlet of the air duct 4 is smoother. Further preferably, in the case that the damper 52 closes the ventilation opening 51, a tangent of an end of the arc surface away from the rotation shaft 53 is parallel to the horizontal plane. At this time, when the air door 52 closes the vent 51, the air flow generated by the centrifugal fan 3 has a large pushing force on the air door 52, so that the air door 52 generates a fast rotation action, which is beneficial to fast opening the vent 51; in the rotating process of the air door 52 from the position closing the ventilation opening 51 to the position opening the ventilation opening 51, the pushing force of the air flow on the air door 52 is gradually reduced, the air door 52 slowly rotates to the opening position, the gravity center of the air door 52 is ensured not to cross the rotating shaft 53 and is positioned on the other side of the rotating shaft 53, in this way, after the centrifugal fan 3 is closed, the air door 52 naturally falls under the action of gravity until the ventilation opening 51 is closed, and the process of closing or opening the ventilation opening 51 by the air door 52 assembly is safer and more reliable.

It will be understood that during operation of the centrifugal fan 3 and after the centrifugal fan 3 has been switched off, there will be a small amount of waste oil which will accumulate over a long period of time, falling on the oil pan 5 in the region where the damper 52 is not provided, and which will flow into the filter device 2 along the edge of the vent 51 when the damper 52 is opened. In order to solve the above problem, referring to fig. 1, 2 and 4, a second oil sump 55 is provided in the oil pan 5 around the vent 51. At this time, when the range hood is restarted after being closed, the waste oil in the area of the air door 52 on the oil receiving tray 5 can be accumulated in the first oil collecting tank 54, and the waste oil in the area of the non-air door 52 can be accumulated in the second oil collecting tank 55, so that the amount of the waste oil dropping to the filter device 2 is effectively reduced, and the service life of the filter device 2 is prolonged.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A range hood comprises a shell, a centrifugal fan and a filtering device, wherein an air suction opening and an air exhaust opening are formed in the shell, an air duct is formed between the air suction opening and the air exhaust opening, the filtering device and the centrifugal fan are sequentially arranged in the air duct along the flowing direction of air, and the filtering device is positioned below the centrifugal fan; the centrifugal fan oil collecting device is characterized by further comprising an oil collecting disc, wherein the oil collecting disc is arranged between the centrifugal fan and the filtering device, a ventilation opening is formed in the oil collecting disc, an air door is arranged at the ventilation opening, a first oil collecting tank is arranged below the first end of the air door, the first end of the air door is rotatably connected with the first oil collecting tank through a rotating shaft, and the air door can rotate between an opening position and a closing position;

when the centrifugal fan is closed, the air door rotates to the closed position, and the air door closes the ventilation opening; when centrifugal fan starts, the air door rotates extremely open position, the air door is opened the vent, just the air door is kept away from the one end of pivot is located the top of vent.

2. The range hood of claim 1, wherein the number of the dampers is plural, and the plurality of dampers are arranged in parallel.

3. The range hood of claim 2, wherein the damper is configured to rotate about the rotation axis under the action of the airflow generated by the centrifugal fan so as to open the vent, and the damper is configured to close the vent under the action of gravity when the action of the airflow is removed.

4. The range hood of claim 3, wherein the damper has a center of gravity proximate the axis of rotation.

5. The range hood of claim 4, wherein the rotating shaft is disposed on and bisects the slot of the first oil sump.

6. The range hood of claim 5, wherein a sidewall of the first oil sump, which is parallel to the rotating shaft, is higher than the rotating shaft.

7. The range hood of claim 6, wherein the surface of the damper adjacent to the filter device is convex in a direction away from the filter device to form an arc.

8. The range hood of any one of claims 1 to 7, wherein a second oil collecting tank is arranged on the oil receiving pan around the ventilation opening.

9. The range hood of claim 1, further comprising a controller, wherein the damper and the centrifugal fan are both electrically connected to the controller, and when the centrifugal fan is turned off, the controller controls the damper to close the vent; when the centrifugal fan is opened, the controller controls the damper to open the vent.

10. The range hood of claim 1, wherein the housing comprises a box body and a fume collecting hood connected to the bottom of the box body, the centrifugal fan is disposed in the box body, and the filtering device and the oil receiving pan are disposed in the fume collecting hood.