CN219550614U - Fume exhauster - Google Patents

Abstract

The utility model discloses a range hood, which comprises a fan frame and a horizontally arranged fan system arranged in the fan frame, wherein the fan system comprises a volute and an impeller arranged in the volute, and is characterized in that: noise reduction components are arranged between the spiral case and the corners of the fan frame. Compared with the prior art, the utility model has the advantages that: noise reduction processing can be performed on noise generated during operation of the fan system.

Description

Fume exhauster

Technical Field

The utility model relates to a lampblack purifying device, in particular to a range hood.

Background

The fume exhauster is one kitchen appliance for purifying kitchen environment, and has the functions of exhausting fume produced during the burning of kitchen range and cooking process, reducing pollution, purifying air, etc.

The utility model discloses a range hood disclosed in Chinese patent application number 201710923578.8, which comprises a case and a horizontally arranged fan arranged in the case, wherein an air channel is formed in the case, the fan is a ternary fan, the fan is arranged above the air channel and is positioned at the top of the case, and a rotary filter screen is arranged in the case and at the inlet of the air channel.

When the range hood works, the impeller rotates at a high speed, so that noise such as vibration noise, pneumatic noise and the like is generated in the fan system, and part of the noise is transmitted out through the air inlet channel of the range hood, so that bad experience is brought to a user.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the range hood capable of reducing noise when a fan system operates.

The technical scheme adopted for solving the technical problems is as follows: the utility model provides a range hood, includes the fan system of the horizontal arrangement of fan frame and setting in the fan frame, the fan system includes spiral case and sets up the impeller in the spiral case, its characterized in that: noise reduction components are arranged between the spiral case and the corners of the fan frame.

Noise reduction components are arranged between the spiral case and corners of the fan frame, so that noise generated during operation of the fan system can be reduced.

In order to facilitate the fixing of the noise reduction assembly, the noise reduction assembly is arranged between the volute and the fan frame in an interference fit manner.

In order to absorb noise transmitted from various places in the volute, the noise reduction assembly comprises at least one of a first noise reduction piece, a second noise reduction piece and a third noise reduction piece, the volute comprises an air outlet, when the air outlet faces upwards, one point on the axis of the impeller is taken as a first center, the first center is taken as an origin, a coordinate system is established, in the coordinate system, a horizontal line passing through the first center is taken as an X axis, a vertical line passing through the first center is taken as a Y axis, the first noise reduction piece is located in a first quadrant of the coordinate system, the second noise reduction piece and the air outlet are located in a second quadrant of the coordinate system, and the third noise reduction piece is located in a fourth quadrant of the coordinate system.

For the laminating of being convenient for fall a piece of making an uproar and spiral case, fan frame to improve the noise reduction effect, the cross section of first piece of making an uproar that falls is the rectangle, the cross section of second piece of making an uproar and the third piece of making an uproar that falls is triangle-shaped.

Preferably, each noise reduction member is sound-absorbing cotton.

In order to prevent the falling of the noise reduction assembly, the range hood is further provided with a limiting piece for preventing the falling of the noise reduction assembly when the fan system is horizontally arranged.

Preferably, the limiting member includes a flange provided on the blower housing and extending toward the scroll direction, the flange abutting against the bottom of the noise reduction assembly, thereby defining a position of the noise reduction member near one side of the blower housing by the flange.

Preferably, the limiting member comprises a pressing plate for preventing the noise reduction assembly from falling down, the pressing plate is arranged on the volute and extends towards the corresponding wall surface of the fan frame, and the pressing plate is abutted to the bottom of the noise reduction assembly, so that the position, close to one side of the volute, of the noise reduction member is limited by the pressing plate.

Compared with the prior art, the utility model has the advantages that: noise reduction components are arranged between the spiral case and corners of the fan frame, so that noise generated during operation of a fan system can be reduced; through setting up the locating part to can prevent that each piece of making an uproar from falling can soak full greasy dirt after receiving the greasy dirt pollution for a long time, drop under the action of gravity.

Drawings

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

fig. 2 is an exploded view of fig. 1.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

In the description of the present utility model, 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 purposes of describing the present utility model 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 because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Referring to fig. 1-2, a range hood is shown, only in part, comprising a fan frame 1 and a horizontally disposed fan system 2 disposed within the fan frame 1. The fan system 2 includes a volute 21 and an impeller 22 disposed within the volute 21. The volute 21 includes an air outlet 211 and an air inlet 212. When the fan system 2 is horizontally placed, the air inlet 212 is disposed downward (the axis of the fan system 2 is vertical). In fig. 1 and 2, the viewing angle is transverse to the axis of the fan system 2 for purposes of clearly illustrating the aspects of the present utility model.

The range hood further comprises a noise reduction assembly arranged between the volute 21 and a corner of the fan frame 1. The noise reduction assembly includes at least one of the first noise reduction member 31, the second noise reduction member 32, and the third noise reduction member 33, and preferably includes the three noise reduction members. When the air outlet 211 of the fan system 2 is upward, a point on the axis of the impeller 22 is taken as a first center, and a coordinate system is established with the first center as an origin, in the coordinate system, a horizontal line passing through the first center is taken as an X axis, a vertical line passing through the first center is taken as a Y axis, the positive direction of the X axis is the opposite side to the air outlet 211, as shown in fig. 1, the positive direction of the Y axis is the right direction, and the positive direction of the Y axis is upward, so that the first noise reduction piece 31 is positioned in a first quadrant of the coordinate system, the second noise reduction piece 32 and the air outlet 211 are positioned in a second quadrant of the coordinate system, and the third noise reduction piece 33 is positioned in a fourth quadrant of the coordinate system.

Each noise reduction element is preferably a sound absorbing cotton and is mounted by an interference fit with the volute 21 and the fan frame 1. The cross section of the first noise reduction member 31 is rectangular, and is arranged between the annular wall at the air outlet 211 of the volute 21 and the fan frame 1, and mainly aims at noise reduction of a sound source at the air outlet 211. The cross section of the second noise reduction member 32 is triangular, especially a right triangle, and two right-angle sides are attached to the wall surface of the fan frame 1, and mainly reduce noise for the sound source at the air outlet 211. The third noise reduction member 33 has a triangular cross section, especially a right triangle, and two right-angle sides are attached to the wall surface of the fan frame 1, and mainly perform vortex breaking and noise reduction effects on fluid vortices generated between the air inlet 212 of the volute 21 and the fan frame 1.

In order to prevent each noise reduction piece from being soaked with oil stain after being polluted by the oil stain for a long time, the noise reduction piece is easy to fall under the action of gravity, and the range hood is also provided with a limiting piece for preventing the noise reduction piece from falling down when the fan system 2 is horizontally arranged. The stopper includes a flange 41 for preventing each noise reduction member from falling down, the flange 41 is provided on the fan frame 1 and extends in the direction of the inner side (the scroll 21), and the flange 41 abuts against the bottom of each noise reduction member. The limiting member further includes a pressing plate 42 for preventing the noise reduction members from falling down, the pressing plate 42 is disposed on the scroll casing 21 and extends toward the outer side direction (corresponding wall surface of the fan frame 1) of the scroll casing 21, and the pressing plate 42 abuts against the bottom of each noise reduction member. In the present embodiment, the pressing plate 42 is applied only to the first noise reduction member 31 and the third noise reduction member 33.

Claims (7)

1. The utility model provides a range hood, includes fan frame (1) and sets up fan system (2) of horizontal arrangement in fan frame (1), fan system (2) include spiral case (21) and set up impeller (22) in spiral case (21), its characterized in that: a noise reduction assembly is arranged between the volute (21) and a corner of the fan frame (1), and the noise reduction assembly is arranged between the volute (21) and the fan frame (1) in an interference fit mode.

2. The range hood of claim 1, wherein: the noise reduction assembly comprises at least one of a first noise reduction piece (31), a second noise reduction piece (32) and a third noise reduction piece (33), the volute (21) comprises an air outlet (211), when the air outlet (211) faces upwards, one point on the axis of the impeller (22) is taken as a first center, the first center is taken as an origin, a coordinate system is established in the coordinate system, a horizontal line passing through the first center is taken as an X axis, a vertical line passing through the first center is taken as a Y axis, the first noise reduction piece (31) is located in a first quadrant of the coordinate system, the second noise reduction piece (32) and the air outlet (211) are located in a second quadrant of the coordinate system, and the third noise reduction piece (33) is located in a fourth quadrant of the coordinate system.

3. The range hood of claim 2, wherein: the cross section of the first noise reduction piece (31) is rectangular, and the cross sections of the second noise reduction piece (32) and the third noise reduction piece (33) are triangular.

4. The range hood of claim 2, wherein: each noise reduction piece is sound-absorbing cotton.

5. The range hood of claim 1, wherein: the range hood is also provided with a limiting piece for preventing the noise reduction assembly from falling down when the fan system (2) is horizontally arranged.

6. The range hood of claim 5, wherein: the limiting piece comprises a flange (41), the flange (41) is arranged on the fan frame (1) and extends towards the direction of the volute (21), and the flange (41) abuts against the bottom of the noise reduction assembly.

7. The range hood of claim 5, wherein: the limiting piece comprises a pressing plate (42), the pressing plate (42) is arranged on the volute (21) and extends towards the corresponding wall surface of the fan frame (1), and the pressing plate (42) is abutted to the bottom of the noise reduction assembly.