CN215216361U

CN215216361U - Fume exhaust fan

Info

Publication number: CN215216361U
Application number: CN202120038877.5U
Authority: CN
Inventors: 余旭锋; 耿芳芳
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2021-01-06
Filing date: 2021-01-06
Publication date: 2021-12-17
Anticipated expiration: 2031-01-06

Abstract

The utility model discloses a range hood, including collection petticoat pipe and the fan frame of setting in collection petticoat pipe top, be provided with main fan system in the fan frame, main fan system includes the spiral case, the axis of main fan system extends on the front and back direction, be formed with an album smoke chamber in the collection petticoat pipe, main air intake has been seted up at the top in album smoke chamber, range hood still includes supplementary air inlet system, supplementary air inlet system is including seting up the supplementary air intake in the collection smoke chamber outside, thereby with the supplementary air outlet of the inside intercommunication of fan frame and with gaseous supplementary air intake suction to the supplementary fan in the supplementary air outlet entering fan frame, the length of supplementary air outlet on the front and back direction is less than the spiral case length on the front and back direction. Compared with the prior art, the utility model has the advantages of: the length of the auxiliary air outlet of the auxiliary air inlet system in the front-back direction is smaller than that of the volute, so that the oil smoke entering from the auxiliary air outlet cannot interfere with the air flow entering the main fan system to form a vortex.

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 indispensable kitchen household electrical appliances in modern families, and the range hood generally comprises a top suction type range hood and a side suction type range hood, and the top suction type range hood has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like. The top-suction type range hood generally includes a fume collecting hood, a fan housing located on the fume collecting hood, and a volute, an impeller, and a motor for driving the impeller are installed in the fan housing.

For example, the chinese patent application No. 201710213082.1 discloses a range hood, which comprises a casing, a smoke collecting hood, an oil filter screen and a smoke guide plate, wherein the oil filter screen comprises an inner oil filter screen and an outer oil filter screen, an air inlet channel is formed between the smoke guide plate and the smoke collecting hood, the range hood further comprises a driving mechanism, one of the inner oil filter screen and the outer oil filter screen is a movable oil filter screen, the other oil filter screen is a fixed oil filter screen, and the driving mechanism can drive the smoke guide plate and the movable oil filter screen to synchronously move, so as to simultaneously change the size of the air inlet channel and the gap between the movable oil filter screen and the fixed oil filter screen.

The range hood is mainly characterized by comprising a deep smoke collecting cavity and a ring suction plate, wherein an air inlet of the range hood is far away from a kitchen range, but the smoke collecting cavity can collect smoke in a large area by expanding a negative pressure area and the deep smoke collecting cavity.

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, effectively strengthen the smoking ability of collection petticoat pipe both sides, prevent that the oil smoke from locating the escape in both sides to satisfy the public flue of big negative pressure or have the operating mode of outside air interference.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a range hood, includes collection petticoat pipe and sets up the fan frame in collection petticoat pipe top, be provided with main fan system in the fan frame, main fan system includes the spiral case, the axis of main fan system extends in the front and back direction, be formed with an album smoke chamber in the collection petticoat pipe, main air intake, its characterized in that have been seted up at the top in album smoke chamber to the collection petticoat pipe: the range hood further comprises an auxiliary air inlet system, the auxiliary air inlet system comprises an auxiliary air inlet arranged on the outer side of the smoke collection cavity, an auxiliary air outlet communicated with the interior of the fan frame and an auxiliary fan for sucking air from the auxiliary air inlet to the auxiliary air outlet so that the air enters the fan frame, and the length of the auxiliary air outlet in the front-back direction is smaller than that of the volute in the front-back direction.

The input of main fan system is located both sides around the spiral case at least one side, be formed with inlet air duct between the input of main air intake and main fan system, supplementary air inlet system is still including setting up the mounting panel in the at least one side of the inboard left and right sides of collection petticoat pipe, the mounting panel is located between collection petticoat pipe inboard and the inlet air duct, supplementary air outlet is seted up on the mounting panel, supplementary air intake intercommunication collection petticoat pipe's inside and outside, supplementary air outlet intercommunication collection petticoat pipe's inboard and inlet air duct, supplementary fan sets up in collection petticoat pipe.

Preferably, the auxiliary air outlet is located below the volute.

In order to ensure that the auxiliary air outlet has enough distance to convert the transverse air flow into vertical air flow to enter the main fan system, the distance between the auxiliary air outlet and the bottom of the volute is more than 20 mm.

In order to reduce the interference of the auxiliary air outlet on the air inlet flow of the main air inlet and ensure the air inlet flow rate of the main air inlet, the distance between the auxiliary air outlet and the main air inlet is more than 20 mm.

In order to reduce the outlet resistance of the auxiliary fan and improve the efficiency of the auxiliary fan, the area of the auxiliary air outlet is larger than that of the auxiliary fan.

In order to ensure that the outlet airflow of the auxiliary fan is under the volute and prevent the inlet airflow of the main air inlet from being interfered, the axis of the auxiliary fan is parallel to the axis of the main fan system, and the air outlet direction of the auxiliary fan is perpendicular to the air inlet direction of the main air inlet.

Further, range hood still establishes the fan dustcoat in the fan frame outside including the cover, the mounting hole has been seted up at the top of collection petticoat pipe, the bottom of collection petticoat pipe is formed with the depressed part that makes progress sunken, collection smoke chamber forms in the below of depressed part, the bottom of fan frame passes the periphery portion that sets up the main air intake inboard at collection petticoat pipe behind the mounting hole, the bottom of fan dustcoat sets up the mounting hole department at collection petticoat pipe top, at least one side of fan frame left and right sides constitutes the mounting panel.

In order to effectively increase the wind speed of the left side and the right side of the fume collecting hood and improve the fume suction capacity, the auxiliary fan is arranged between the top of the fume collecting hood and the concave part.

Compared with the prior art, the utility model has the advantages of: by arranging the auxiliary air inlet system, the smoking capacity of the left side and the right side of the smoke collecting hood can be effectively enhanced, oil smoke is prevented from escaping at the two sides, a large negative pressure common flue or a working condition with external air interference is met, the length of the auxiliary air outlet arranged below the volute in the front-back direction is smaller than the length of the volute in the front-back direction (the thickness of the volute), and therefore the oil smoke entering the air inlet channel from the auxiliary air outlet cannot interfere with the entering air flow in the front-back direction of the main fan system to form a vortex; the distance between the auxiliary air outlet and the bottom of the volute is controlled to be more than 20mm, so that the auxiliary air outlet is ensured to have a long enough distance to convert the transverse airflow into vertical airflow to enter the main fan system; the distance between the auxiliary air outlet and the main air inlet is controlled to be more than 20mm, so that the interference of the auxiliary air outlet on the air inlet flow of the main air inlet can be reduced, and the air inlet flow rate of the main air inlet is ensured; the auxiliary fan is arranged between the top of the fume collecting hood and the concave part, so that the wind speeds of the left side and the right side of the fume collecting hood can be effectively increased, and the fume suction capacity is improved; the area of the auxiliary air outlet is larger than that of the air outlet of the auxiliary fan, so that the outlet resistance of the auxiliary fan can be reduced, and the efficiency of the auxiliary fan is improved; the axis of the auxiliary fan is parallel to the axis of the main fan system, and the air outlet direction of the auxiliary fan is perpendicular to the air inlet direction of the main air inlet, so that the outlet airflow of the auxiliary fan is ensured to be under the volute, and the interference on the inlet airflow of the main air inlet is prevented; the rotating speed of the auxiliary fan can be increased or decreased proportionally according to the rotating speed of the main fan system, so that the rotating speed of the auxiliary fan can be automatically adjusted according to the outlet resistance of the range hood, the working efficiency of the auxiliary fan is improved, and the service life of the auxiliary fan is prolonged.

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 (left-right direction section) of the range hood according to the embodiment of the present invention;

fig. 3 is a sectional view (front-back section) of the range hood according to the embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

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 is a ceiling range hood, and includes a fume collecting hood 1, a fan frame 2 disposed above the fume collecting hood 1, and a fan housing 6 disposed outside the fan frame 2.

The inner side of the fume collecting hood 1 is hollow, the top of the fume collecting hood 1 is provided with a mounting hole 12, the bottom of the fume collecting hood 1 is provided with an upward sunken depressed part 14, and a fume collecting cavity 13 is formed below the depressed part 14. The top of the smoke collecting cavity 13 is provided with a main air inlet 11, the bottom of the fan frame 2 passes through the mounting hole 12 and then is arranged on the periphery of the main air inlet 11 on the inner side of the smoke collecting hood 1, and the bottom of the fan outer cover 6 is arranged on the mounting hole 12 on the top of the smoke collecting hood 1.

The main fan system 3 is arranged in the fan frame 2, the main fan system 3 comprises a volute 31, the input end of the main fan system 3 is located on the front side and the rear side and is used for double air inlet on the front side and the rear side, namely, the axis of the main fan system 3 extends in the front-rear direction. Alternatively, the main fan system 3 may be a single intake fan. An air inlet channel 4 is formed between the main air inlet 11 and the input end of the main fan system 3.

The range hood also comprises an auxiliary air inlet system 5. The auxiliary air inlet system 5 comprises mounting plates which are respectively arranged on the left side and the right side of the inner side of the fume collecting hood 1 and are positioned between the inner side of the fume collecting hood 1 and the air inlet channel 4, and the auxiliary air inlet system 5 further comprises an auxiliary air inlet 52 arranged on the fume collecting hood 1 and an auxiliary air outlet 53 arranged on the mounting plates. The auxiliary air inlet 52 is communicated with the inner side and the outer side of the smoke collecting cover 1, and the auxiliary air outlet 53 is communicated with the inner side of the smoke collecting cover 1 and the air inlet channel 4. The auxiliary air inlets 52 are disposed on the left and right sides of the smoke collecting cavity 13, and may be in a circular hole array arrangement or a strip array arrangement, or in other shapes. In this embodiment, the left and right sides of the fan frame 2 constitute the mounting plate. The auxiliary air outlets 53 are arranged on the left side and the right side of the fan frame 2, so that the smoking capability of the left side and the right side of the smoke collecting cover 1 can be effectively enhanced, and the oil smoke is prevented from escaping from the two sides.

The auxiliary air outlet 53 is located below the scroll casing 31, and the length of the auxiliary air outlet 53 in the front-back direction is smaller than the length of the scroll casing 31 in the front-back direction (the thickness of the scroll casing 31), so that the oil smoke entering the air inlet channel 4 from the auxiliary air outlet 53 does not interfere with the entering air flow in the front-back direction of the main fan system 3 to form a vortex. The distance between the auxiliary air outlet 53 and the bottom of the volute casing 31 is more than 20mm, so that the auxiliary air outlet 53 has a sufficient distance to convert the transverse air flow into the vertical air flow to enter the main fan system 3. The distance between the auxiliary air outlet 53 and the main air inlet 11 is more than 20mm, so that the interference of the auxiliary air outlet 53 on the air inlet flow of the main air inlet 11 can be reduced, and the air inlet flow rate of the main air inlet 11 is ensured.

The auxiliary fans 51, preferably cross flow fans, are arranged on one sides of the two auxiliary air outlets 53 facing the inner side of the smoke collecting hood 1, and the two cross flow fans can ensure that left and right air inlets are uniform. The auxiliary fan 51 is positioned between the top of the fume collecting cover 1 and the depressed part 14, the space between the top of the fume collecting cover 1 and the depressed part 14 is small, the wind speeds of the left side and the right side of the fume collecting cover 1 can be effectively increased, and the fume suction capacity is improved. The area of the auxiliary air outlet 53 is larger than the area of the air outlet of the auxiliary fan 51, so that the outlet resistance of the auxiliary fan 51 can be reduced, and the efficiency of the auxiliary fan 51 is improved.

The axis of the auxiliary fan 51 extends in the front-rear direction and is parallel to the axis of the main fan system 3, and the air outlet direction of the auxiliary fan 51 is perpendicular to the air inlet direction of the main air inlet 11, so that the outlet airflow of the auxiliary fan 51 is ensured to be under the volute 31, and the interference on the inlet airflow of the main air inlet 11 is prevented.

The rotating speed of the auxiliary fan 51 can be increased or decreased in the same proportion according to the rotating speed of the main fan system 3, the rotating speed of the auxiliary fan 51 can be automatically adjusted according to the outlet resistance of the range hood, and the working efficiency and the service life of the auxiliary fan 51 are improved.

Claims

1. The utility model provides a range hood, includes collection petticoat pipe (1) and sets up fan frame (2) in collection petticoat pipe (1) top, be provided with main fan system (3) in fan frame (2), main fan system (3) include spiral case (31), the axis of main fan system (3) extends in the front and back direction, be formed with collection smoke chamber (13) in collection petticoat pipe (1), main air intake (11), its characterized in that have been seted up at the top of collection smoke chamber (13) to collection petticoat pipe (1): the range hood further comprises an auxiliary air inlet system (5), the auxiliary air inlet system (5) comprises an auxiliary air inlet (52) formed in the outer side of the smoke collection cavity (13), an auxiliary air outlet (53) communicated with the interior of the fan frame (2), and an auxiliary fan (51) for sucking air from the auxiliary air inlet (52) to the auxiliary air outlet (53) so as to enter the fan frame (2), and the length of the auxiliary air outlet (53) in the front-back direction is smaller than that of the volute (31) in the front-back direction.

2. The range hood of claim 1, wherein: the input of main fan system (3) is located both sides around spiral case (31) at least one side, be formed with inlet air channel (4) between the input of main air intake (11) and main fan system (3), supplementary air inlet system (5) are still including setting up the mounting panel in at least one side of the left and right sides of collection petticoat pipe (1) inboard, the mounting panel is located between collection petticoat pipe (1) inboard and inlet air channel (4), set up on the mounting panel auxiliary air outlet (53), auxiliary air intake (52) intercommunication collection petticoat pipe (1) the inside and outside, auxiliary air outlet (53) intercommunication collection petticoat pipe (1) inboard and inlet air channel (4), auxiliary fan (51) set up in collection petticoat pipe (1).

3. The range hood of claim 1, wherein: the auxiliary air outlet (53) is positioned below the volute (31).

4. The range hood of claim 3, wherein: the distance between the auxiliary air outlet (53) and the bottom of the volute (31) is more than 20 mm.

5. The range hood of claim 4, wherein: the distance between the auxiliary air outlet (53) and the main air inlet (11) is more than 20 mm.

6. The range hood of claim 1, wherein: the area of the auxiliary air outlet (53) is larger than that of the auxiliary fan (51).

7. The range hood of claim 1, wherein: the axis of the auxiliary fan (51) is parallel to the axis of the main fan system (3), and the air outlet direction of the auxiliary fan (51) is perpendicular to the air inlet direction of the main air inlet (11).

8. The range hood of claim 2, wherein: range hood still establishes fan dustcoat (6) in fan frame (2) outside including the cover, mounting hole (12) have been seted up at the top of collection petticoat pipe (1), the bottom of collection petticoat pipe (1) is formed with recess (14) that make progress sunken, collection smoke chamber (13) form the below at recess (14), the bottom of fan frame (2) passes the week portion that sets up main air intake (11) at collection petticoat pipe (1) inboard behind mounting hole (12), the bottom of fan dustcoat (6) sets up mounting hole (12) department at collection petticoat pipe (1) top, at least one side of fan frame (2) left and right sides constitutes the mounting panel.

9. The range hood of claim 8, wherein: the auxiliary fan (51) is arranged between the top of the fume collecting hood (1) and the concave part (14).