CN215216399U

CN215216399U - Fume exhaust fan

Info

Publication number: CN215216399U
Application number: CN202121463829.7U
Authority: CN
Inventors: 何立博; 刘元卉; 郑聪; 赵民旺; 徐群浪
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2021-12-17
Anticipated expiration: 2031-06-29

Abstract

The utility model discloses a range hood, including the collection petticoat pipe, the air intake has been seted up on the collection petticoat pipe, air intake department is provided with filter screen subassembly, its characterized in that: the filter screen subassembly includes first filter screen, first filter screen has mutually independent at least two and control interval arrangement, and every first filter screen includes interval arrangement's net piece about at least two, constitutes air inlet channel between two adjacent net pieces, the net piece can rotate around the axle that the fore-and-aft direction extends. Compared with the prior art, the utility model has the advantages of: through setting up rotatable net piece, can and then adjust the regional distribution of air inlet area and negative pressure, adjust the amount of wind or the air inlet area adaptation culinary art condition along with the operating mode change about realizing, promote whole oil absorption cigarette effect.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil smoke purifier, especially a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The top-suction type range hood adopts an oil smoke rising principle, a negative pressure area is generated right above a cooking bench to suck and exhaust naturally rising oil smoke generated during cooking, and the range hood has the advantages of fashionable and concise appearance, larger air volume, larger space and capability of capturing the oil smoke far away from the cooking bench, and has the defects that the installation height is far away from the cooking bench, and the oil smoke above a pot is easy to be disturbed by ambient air to cause the escape of the oil smoke to the periphery under the cooking state with small oil smoke volume, so that the oil smoke suction effect is poor.

Therefore, a smoke guide plate is generally arranged below an air inlet of the top-suction range hood to form an annular suction structure, and the oil smoke suction effect is improved by utilizing the coanda effect. The top suction type range hood with the smoke guide plate disclosed in the chinese patent with the application number of 201410419676.4 comprises a body, a smoke collecting hood and the smoke guide plate, wherein the smoke collecting hood is connected with the body, a fan is arranged in the body, an air inlet is arranged on the smoke collecting hood, the smoke guide plate is arranged right opposite to the air inlet of the smoke collecting hood and fixed on the smoke collecting hood through a bracket or a buckle, and a distance exists between the smoke guide plate and the smoke collecting hood to form a smoke channel.

Because the range hood adopting the smoke guide plate does not drip oil and has better oil smoke absorption effect, the range hood has more and more extensive application in recent years. The existing range hood adopting the smoke guide plate often has the following disadvantages:

1. when the traditional range hood is used on a common double stove, the difference between the smoke quantity generated by the quick-frying side and the soup cooking side is large, and the air quantity or the area of an air inlet cannot be adjusted to adapt to the cooking condition;

2. although the air inlet of part of the range hood is adjusted along with the oil smoke, the normally unadjusted net is easy to disassemble and assemble, the adjusted net is difficult to disassemble and assemble and is difficult to clean, oil stains are easy to block the gaps of the net pieces after a long time, and double troubles are brought to the cleanness of users.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art existence, provide a range hood, can realize that air inlet area and negative pressure regional distribution come the adaptation culinary art condition, promote the oil absorption cigarette effect.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a range hood, includes the collection petticoat pipe, the air intake has been seted up on the collection petticoat pipe, air intake department is provided with filter screen subassembly, its characterized in that: the filter screen subassembly includes first filter screen, first filter screen has mutually independent at least two and control interval arrangement, and every first filter screen includes interval arrangement's net piece about at least two, constitutes air inlet channel between two adjacent net pieces, the net piece can rotate around the axle that the fore-and-aft direction extends.

In order to enhance the oil filtering effect, the air inlet channel is provided with an air inlet end and an air outlet end, and the air inlet area of the air inlet channel is enlarged from the air inlet end to the air outlet end.

Preferably, in order to smoothly guide the air flow, the cross section of each mesh is streamline, the mesh has a windward side and an air outlet side, and the width of the windward side of the mesh is greater than that of the air outlet side of the mesh.

In order to drive the meshes to be linked, the meshes of each first filter screen are connected into a whole through a first connecting rod, each mesh is connected with the first connecting rod through a second connecting rod, the second connecting rod is rotatably connected with the meshes and the first connecting rod, and the first connecting rod can move left and right to drive the meshes to rotate.

Preferably, each first filter screen further comprises a driving mechanism for driving the first link to move in order to automatically drive the mesh sheet.

The filter screen assembly is convenient for the rotation of the net piece, and further comprises a frame fixed at the air inlet, and the front end and the rear end of the net piece are respectively connected with the frame through rotating shafts in a rotating mode.

In order to introduce airflow to spray and protect the upper part of the net piece, so that the net piece is simple to clean and enclose, the rotating shaft is hollow, a pressure equalizing cavity communicated with fluid of the rotating shaft is formed inside the net piece, air outlets are formed on two sides, facing the air inlet channel, of the net piece respectively, and the air outlets face the air outlet side of the net piece; the filter screen assembly is characterized in that a fan frame is arranged above the smoke collecting hood, a fan system with an air outlet is arranged in the fan frame, the filter screen assembly further comprises a guide pipe, and the guide pipe is connected to the frame and is used for communicating the pressure equalizing cavity of the net piece with the air outlet of the fan system in a fluid mode.

Preferably, the mesh is formed by connecting two parts, and the air outlet nozzle is a gap at the joint of the two parts.

In order to further improve the oil filtering effect, the range hood further comprises a second filter screen arranged at the air inlet, and the second filter screen is positioned below the first filter screen.

Preferably, the second filter screen may be tapered from top to bottom.

Compared with the prior art, the utility model has the advantages of: by arranging the rotatable net piece, the distribution of the air inlet area and the negative pressure area can be further adjusted, the cooking condition can be adapted by adjusting the air quantity or the air inlet area along with the change of working conditions from left to right, and the whole oil fume absorption effect is improved; the air inlet channel with the gradually increased air inlet area is arranged, so that oil fume flows through the lower part to enter the oil filter, oil is filtered by contacting the surface area similar to the traditional filter screen, falling vortex separation can be formed due to the damage of a boundary layer, and the oil filtering effect is enhanced; high-pressure airflow of the fan system is introduced into the net sheet and is sprayed to the upper part, so that the upper part of the net sheet is protected, and the net sheet is simple to clean and maintain.

Drawings

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

fig. 2 is a sectional view (front-rear section) of the range hood according to the embodiment of the present invention;

fig. 3 is a cross-sectional view (left-right cross-section) of the range hood according to the embodiment of the present invention;

fig. 4 is a schematic view of a filter screen assembly and a fan system of a range hood according to an embodiment of the present invention;

fig. 5 is an exploded schematic view of a filter screen assembly of the range hood according to the embodiment of the present invention;

fig. 6 is a schematic view of a mesh sheet of a filter screen assembly of the range hood according to the embodiment of the present invention;

fig. 7 is a cross-sectional view of a mesh sheet of a filter screen assembly of the range hood according to the embodiment of the present invention;

fig. 8 is a left side closed and right side open state sectional view of the range hood according to the embodiment of the present invention;

fig. 9 is a cross sectional view of the range hood according to the embodiment of the present invention in a fully opened state at both sides.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to 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," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1 to 3, a range hood, which is a ceiling range hood, includes a fume collecting hood 1 and a fan frame 2 disposed above the fume collecting hood 1, and a fan system 3 is disposed in the fan frame 2. The smoke collecting cover 1 is provided with an air inlet 11, so that the oil smoke can enter the fan frame 2 from the air inlet 11 in the upward rising process and is discharged by the fan system 3. The bottom of the fume collecting hood 1 is upwards sunken to form a fume collecting cavity 12, and the air inlet 11 is positioned at the top of the fume collecting cavity 12. The air inlet 11 may be provided with a screen assembly 4.

The filter screen assembly 4 includes a first filter screen 41, a frame 42 and a duct 43, the first filter screen 41 includes at least two mesh sheets 411 arranged at a left-right interval, and an air intake passage 412 is formed between two adjacent mesh sheets 411. Referring to fig. 6 and 7, a longitudinal section (as shown in fig. 2 in the installation state) of each mesh 411 is streamline, the lower portion of the mesh 411 is a windward side (a wind inlet end of the wind inlet channel 412), the upper portion of the mesh is a wind outlet side (a wind outlet end of the wind inlet channel 412), the windward side refers to a side facing the oil smoke gas flow, that is, on the oil smoke flow path, the windward side is located at the upstream of the wind outlet side, the width of the lower portion is larger than that of the upper portion, the bottom surface of the mesh 411 is a curved surface protruding downwards, preferably an arc surface, a protruding point or a pattern can be designed on the bottom surface, and the wind outlet side of the mesh 411 is in a pointed shape, thereby forming a water droplet shape. Therefore, the air inlet area of the air inlet channel 412 between the two adjacent net sheets 411 is enlarged from bottom to top, the structure can enable oil smoke gas flow to enter through the lower portion, the oil smoke gas flow is contacted with oil filtering through the surface area similar to the traditional filter screen, the oil smoke gas flow is further enlarged through the air inlet channel 412 because the air inlet channel 412 is diffused, the boundary layer is damaged to form shedding vortex separation, and the oil filtering effect is obviously enhanced.

Referring to fig. 4 to 7, the mesh sheets 411 are integrally connected by a first link 413, each mesh sheet 411 and the first link 413 are connected by a second link 414, the second link 414 is rotatably connected to the mesh sheets 411 and the first link 413, and the rotation axis extends in the front-rear direction. The first filter 41 further includes a driving mechanism 415 for driving the first connecting rod 413 to move left and right, and the driving mechanism 415 is a linear driving module, such as an electric push rod. The net piece 411 can be driven to rotate by the left and right movement of the first connecting rod 413, so that the air inlet channel 412 is adjusted.

The first screens 41 have two, and are arranged at intervals in the left-right direction. The two first filters 41 can be individually adjusted according to oil smoke sales, temperature, and the like. The first screen 41 may have more, each being arranged at intervals in the left-right direction. Alternatively, the first link 413 may be manually controlled.

Each first filter 41 is disposed in a frame 42, and the frame 42 may be fixedly connected to the smoke collecting hood 1 or the fan frame 2. The front end and the rear end of each mesh 411 are respectively rotatably connected with the frame 42 through a rotating shaft 416. The shaft 416 is hollow, and a pressure equalizing chamber 4111 in fluid communication with the shaft 416 is formed inside the mesh 411. Air outlet nozzles 4112 are formed on the left and right sides of the mesh 411, and the air outlet nozzles 4112 face upward. In this embodiment, the mesh 411 is formed by connecting an upper portion and a lower portion, where the upper portion and the lower portion are relative to each other in a vertical state of the mesh 411. The air outlet nozzle 4112 is a gap at the joint of the upper part and the lower part. A channel is formed inside each side wall of the frame 42, one end of the duct 43 is connected to the frame 42, the other end is connected to the air outlet 31 of the fan system 3, and the duct 43 is in fluid communication with the rotating shaft 416 through the frame 42. Therefore, after being filtered by a filter, the high-pressure airflow near the air outlet 31 of the fan system 3 is connected into the channel inside the frame 42 through the conduit 43, enters the pressure equalizing cavity 4111 of the mesh 411 through the rotating shaft 416, is sprayed out through the air outlet 4112, forms an airflow protective film on the upper portion of the mesh 4111, separates oil smoke from the gradually-reduced upper portion, enables the upper portion to be free of cleaning and maintenance, and only needs to wipe the lower portion easily accessible by hand washing and cleaning cloth like a common mesh.

The range hood further comprises a second filter screen 5 arranged at the air inlet 11, and the second filter screen 5 can be tapered from top to bottom. The second screen 5 is located below the first screen 41. A smoke guide plate 6 is arranged below the second filter screen 5.

Referring to fig. 3, in the cooking state that the oil smoke on the right side is slightly more than that on the left side, if the right side is stir-fried and the left side is decocted, the net sheets 411 of the two first filter screens 41 are deflected leftwards, so that the air inlet side of the net sheets 411 is deflected rightwards, if the net sheets are deflected by 30 degrees, the whole right air inlet is smooth compared with the left side, the oil smoke gas flow preferentially flows from the direction with small flow resistance, the total air flow distribution on the right side is increased, and the oil smoke absorption and anti-interference effects on the right side are enhanced.

Referring to fig. 8, under the cooking state that the oil smoke on the right side is much larger than that on the left side, if the right side is stir-fried, the left side is not cooked, the net sheets 411 of the first right filter screen 41 are all deflected leftwards, so that the air inlet side of the net sheets 411 is deflected rightwards, if the net sheets 411 are deflected by 30 degrees, the net sheets 411 of the first left filter screen 41 are rotated to be almost horizontal, the air inlet channel 412 is closed, the whole right air inlet is much larger than that on the left side, and under the condition that the flow rates are consistent, the oil smoke absorption effect and the anti-interference effect on the right side are obviously enhanced.

Referring to fig. 9, when the range hood is closed or left-right cooking conditions are similar, the mesh 411 is in an almost vertical state, and at this time, the first filter screen 41 mainly enhances the grease separation capacity by utilizing the process that oil smoke gas flows through the filtering space, so that the overall oil filtering effect is improved.

Other states of the net piece 411 of the first filter screen 41 can be adjusted in a similar manner, and the automatic adjustment can be conveniently realized by combining mode judgment such as infrared temperature sensing or smoke stove linkage during adjustment.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion), i.e., a fluid (air flow, liquid or a mixture of both) can flow along a flow path from the first portion or/and be transported to the second portion, and may be directly communicated between the first portion and the second portion, or indirectly communicated between the first portion and the second portion via at least one third member, which may be a fluid passage such as a pipe, a channel, a duct, a flow guide, a hole, a groove, or a chamber allowing the fluid to flow therethrough, or a combination thereof.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1), air intake (11) have been seted up on collection petticoat pipe (1), air intake (11) department is provided with filter screen subassembly (4), its characterized in that: the filter screen assembly (4) comprises first filter screens (41), the first filter screens (41) are provided with at least two mutually independent meshes (411) which are arranged at intervals left and right, each first filter screen (41) comprises at least two meshes (411) which are arranged at intervals left and right, an air inlet channel (412) is formed between every two adjacent meshes (411), and the meshes (411) can rotate around a shaft extending in the front-back direction.

2. The range hood of claim 1, wherein: the air inlet channel (412) is provided with an air inlet end and an air outlet end, and the air inlet area of the air inlet channel (412) is enlarged from the air inlet end to the air outlet end.

3. The range hood of claim 2, wherein: the cross section of each net piece (411) is streamline, the net pieces (411) are provided with an upwind side and an air outlet side, and the width of the upwind side of each net piece (411) is larger than that of the air outlet side.

4. The range hood according to any one of claims 1 to 3, wherein: the net sheets (411) of each first filter screen (41) are connected into a whole through a first connecting rod (413), each net sheet (411) is connected with the first connecting rod (413) through a second connecting rod (414), the second connecting rods (414) are rotatably connected with the net sheets (411) and the first connecting rods (413), and the first connecting rods (413) can move left and right to drive the net sheets (411) to rotate.

5. The range hood of claim 4, wherein: each first sieve (41) further comprises a driving mechanism (415) for driving the first link (413) to move.

6. The range hood according to any one of claims 1 to 3, wherein: the filter screen assembly (4) further comprises a frame (42) fixed at the air inlet (11), and the front end and the rear end of the mesh sheet (411) are respectively connected with the frame (42) in a rotating mode through a rotating shaft (416).

7. The range hood of claim 6, wherein: the rotating shaft (416) is hollow, a pressure equalizing cavity (4111) which is communicated with the rotating shaft (416) in a fluid mode is formed inside the net piece (411), air outlet nozzles (4112) are formed in two sides, facing the air inlet channel (412), of the net piece (411), and the air outlet nozzles (4112) face the air outlet side of the net piece (411); be provided with fan frame (2) above collection petticoat pipe (1), be provided with fan system (3) that have air outlet (31) in fan frame (2) filter screen subassembly (4) still include pipe (43), pipe (43) are connected to frame (42) and with the pressure-equalizing chamber (4111) of net piece (411) and air outlet (31) fluid communication of fan system (3).

8. The range hood of claim 7, wherein: the net piece (411) is formed by connecting two parts, and the air outlet nozzle (4112) is a gap at the joint of the two parts.

9. The range hood according to any one of claims 1 to 3, wherein: the range hood further comprises a second filter screen (5) arranged at the air inlet (11), and the second filter screen (5) is located below the first filter screen (41).

10. The range hood of claim 9, wherein: the second filter screen (5) can be tapered from top to bottom.