CN218376987U - Noise reduction volute, fan and range hood - Google Patents

Abstract

The utility model discloses a noise reduction volute, which comprises a volute body and a volute tongue structure connected on the volute body, wherein an airflow channel is formed in the volute body; the volute tongue structure is provided with a plurality of silencing holes communicated with the airflow channel and the interior of the volute tongue structure, and a sound absorption material for blocking the silencing holes is arranged in the volute tongue structure. The utility model also discloses a fan and lampblack absorber. The beneficial effects of the utility model reside in that, the structure is for retrenching, and noise reduction is better.

Description

Noise reduction volute, fan and range hood

Technical Field

The utility model relates to a spiral case, fan and lampblack absorber of making an uproar falls uses the technical field at the lampblack absorber.

Background

At present, the kitchen ventilator industry basically adopts a forward multi-blade centrifugal fan, a volute of the fan is provided with a volute tongue, the volute tongue can prevent a part of gas from circularly flowing in the volute, the efficiency of the fan is improved, and the pressure is increased. However, the arrangement of the volute tongue causes the airflow at the outlet of the impeller to impact, and noise is generated.

Prior art CN112460072A discloses a noise reduction volute tongue, which comprises: the noise reduction device comprises a shell, a noise reduction cavity and a noise reduction hole, wherein the noise reduction cavity is arranged in the shell, and the noise reduction hole is communicated with the noise reduction cavity; the partition plate is arranged in the noise reduction cavity, bends and extends in the noise reduction cavity to divide the noise reduction cavity into noise reduction channels which are communicated in a bending mode; the widths of any two positions of the noise reduction channel are the same, or the width of the noise reduction channel is reduced or increased from one side close to the noise reduction hole to one side far away from the noise reduction hole. The baffle plate is provided with a plurality of bending sections in the noise reduction cavity to form a noise reduction channel with a plurality of bending sections communicated, and each bending section is arc-shaped or fold-line-shaped. Although the proposal provides a deeper sound absorption cavity, the cavity process is complex and is easy to be blocked by oil stains to lose functions.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a spiral case, fan and lampblack absorber of making an uproar fall, the structure is comparatively retrencied, and the noise reduction effect is better.

The utility model discloses a realize through following technical scheme.

A noise reduction volute comprises a volute body and a volute tongue structure connected to the volute body, wherein an air flow channel is formed in the volute body;

the volute tongue structure is provided with a plurality of silencing holes communicated with the airflow channel and the interior of the volute tongue structure, and the interior of the volute tongue structure is provided with a sound absorption material for blocking the silencing holes.

As a further improvement of the utility model, the surface of the volute tongue structure is laminated with a waterproof electroacoustic membrane covering the silencing hole, and the waterproof electroacoustic membrane can be penetrated by noise and can not be penetrated by oil stains.

As a further improvement of the utility model, the inner space of the volute tongue structure is completely filled with sound absorption materials.

As a further improvement of the utility model, one part of the inner space of the volute tongue structure is filled with the sound absorption material, and the other part is an air layer.

As a further improvement, the volute tongue structure comprises a bending plate and a noise reduction box, the bending plate is connected to the volute body and is formed with a mounting groove, the noise reduction box is embedded in the mounting groove, and the sound absorption material is arranged in the noise reduction box.

As a further improvement, the muffling hole is formed in the curved plate, the noise reduction box is provided with a window at the position corresponding to the muffling hole, and the waterproof electro-acoustic film is attached to the curved plate.

As a further improvement, the bloop is arranged on the noise reduction box, the position of the bending plate corresponding to the bloop is provided with a window, and the waterproof electro-acoustic film is embedded in the window and is laminated on the noise reduction box.

As a further improvement, the part of the noise reduction box away from the bending plate is provided with a box cover capable of being detachably connected.

A fan comprises the noise reduction volute and an impeller arranged on the noise reduction volute.

A range hood comprises the fan.

The utility model has the advantages that:

the noise can be absorbed and reduced by the sound absorption material through the sound absorption hole, so that the noise at the volute tongue is reduced; the waterproof electroacoustic film is arranged to isolate oil stains, so that blockage of the silencing hole is avoided.

Drawings

The preferred embodiments of the present invention will hereinafter be described in detail to facilitate an understanding of the objects and advantages of the invention, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic view of a noise reduction volute;

FIG. 2 is a schematic view of a volute tongue structure;

FIG. 3 is a schematic view of an embodiment of a sound absorbing material disposed within a lower volute tongue structure;

FIG. 4 is a schematic view of another embodiment of a sound absorbing material disposed within a lower volute tongue structure;

FIG. 5 is a schematic view of an embodiment lower flexural plate and noise reduction box;

FIG. 6 is a schematic view of another embodiment lower flexural plate and noise reduction box;

FIG. 7 is a schematic view of a noise reduction box and box cover;

fig. 8 is a schematic view of a fan.

Detailed Description

The invention is explained in more detail below with reference to the drawings and exemplary embodiments.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like as referred to or as may be referred to in this specification are defined with respect to the configuration shown in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a particular component and are relative terms, and thus may be changed accordingly depending on the position and the state of use of the particular component. Therefore, these and other directional terms should not be construed as limiting terms.

Example 1:

referring to fig. 1 and 2, the noise reduction volute comprises a volute body 1 and a volute tongue structure 2 connected to the volute body 1, wherein an airflow channel 11 is formed in the volute body 1.

The volute tongue structure 2 is provided with a plurality of silencing holes 21, and the silencing holes 21 communicate the air flow channel 11 with the inner space of the volute tongue structure 2. The sound absorption material 22 is arranged in the volute tongue structure 2, and the sound absorption hole 21 is blocked by the sound absorption material 22, so that noise generated by air flow in the air flow channel 11 can be immediately absorbed by the sound absorption material 22 after the sound absorption hole 21 enters the interior of the volute tongue structure 2, the noise reduction effect on the noise is achieved under the effect of the sound absorption material 22, and the noise reduction effect of the noise reduction volute is further enhanced.

Generally, the aperture of the muffling hole 21 is set to be 1mm-5mm, and the aperture ratio is 3% -30%, in this embodiment, the aperture of the muffling hole 21 is set to be 3mm, and the aperture ratio is 11%, and the setting of the specific parameters is set reasonably according to the actual application conditions.

The sound absorption material 22 has a large number of micro gaps and continuous bubbles which are communicated with the inside and the outside, and has air permeability, when noise enters the surface of the porous material, the noise enters the inside of the material along the micropores to cause the vibration of air in pores, and due to the friction and the viscous resistance of the air, a part of sound energy is converted into heat energy, so that the sound energy is absorbed, and sound absorption and noise reduction are performed.

The sound absorbing material 22 may be made of a material such as a fiber material, glass fiber, or urethane foam.

The noise reduction volute of the embodiment is used in a fan of a range hood, so that oil stains are carried by air flow in the air flow channel 11, the oil stains easily block the noise reduction hole 21, and noise cannot enter the volute tongue structure 2 to reduce the noise. Based on this, the waterproof electroacoustic film 23 is attached to the surface of the volute tongue structure 2, the silencing hole 21 of the volute tongue structure 2 is covered by the waterproof electroacoustic film 23, and the waterproof electroacoustic film 23 can be penetrated by noise and cannot be penetrated by oil dirt, so that the oil dirt carried by the air flow can be isolated by the waterproof electroacoustic film 23, the blockage of the silencing hole 21 is avoided, and the volute tongue structure 2 can maintain a normal noise reduction effect.

The waterproof electroacoustic membrane 23 is preferably a TPU (polyurethane) membrane, has the thickness of 0.01-0.05mm, has good sound transmission and waterproof performance, and is suitable for the performance requirement of avoiding oil contamination in the implementation case.

Referring to fig. 3, in one embodiment, the inner space of the volute tongue structure 2 is completely filled with a sound-absorbing material 22, and the sound-absorbing material 22 can maximize the noise reduction effect thereof.

Referring to fig. 4, in another embodiment, a part of the inner space of the volute tongue structure 2 is filled with a sound absorbing material 22, and another part is an air layer 25. By utilizing the air layer 25, the sound absorption coefficient of the space can be improved, and a certain noise reduction effect is achieved, so that the material can be saved and the cost can be reduced on the premise that the influence of the whole noise reduction effect is not large.

As for the volute tongue structure 2, furthermore, the volute tongue structure 2 comprises a curved plate 2-1 and a noise reduction box 2-2, the curved plate 2-1 is connected to the volute body 1 and is formed with a mounting groove 2k, the noise reduction box 2-2 is embedded in the mounting groove 2k and is fixedly connected by using a fastener, and the sound absorption material 22 is arranged in the noise reduction box 2-2. The volute tongue structure 2 is arranged to be a split structure of the bent plate 2-1 and the noise reduction box 2-2, so that the process difficulty of production and processing can be reduced, and in addition, the strength of the volute tongue structure 2 can be enhanced by a double-layer structure formed by the bent plate 2-1 and the outer wall of the noise reduction box 2-2.

Due to the fact that the bending plate 2-1 and the noise reduction box 2-2 are arranged, if the silencing holes 21 are formed in the bending plate 2-1 and the noise reduction box 2-2, the silencing holes 21 in the bending plate 2-1 and the noise reduction box 2-2 need to be completely aligned, otherwise the problem that the interior of the airflow channel 11 and the interior of the volute tongue structure 2 are not communicated smoothly is caused, but the noise reduction box 2-2 needs to be installed with high accuracy, construction difficulty is improved, and therefore one of the bending plate 2-1 and the noise reduction box 2-2 can be selected to be provided with the silencing holes 21, and the other is provided with the window 24.

Referring to fig. 5, in one embodiment, the muffling hole 21 is formed in the curved plate 2-1, the noise reduction box 2-2 is provided with a window 24 at a position corresponding to the muffling hole 21, and the waterproof electroacoustic membrane 23 is attached to the curved plate 2-1.

Referring to fig. 6, in another embodiment, the muffling hole 21 is disposed on the noise reduction box 2-2, a window 24 is disposed on the curved plate 2-1 corresponding to the muffling hole 21, and the waterproof electroacoustic membrane 23 is embedded in the window 24 and attached to the noise reduction box 2-2.

In addition, a detachably connected box cover 2-3 is arranged at the position, far away from the bent plate 2-1, of the noise reduction box 2-2, before the noise reduction box 2-2 is installed, the sound absorption material 22 is plugged into the noise reduction box 2-2, and then the box cover 2-3 is connected to the noise reduction box 2-2.

Referring to fig. 8, embodiment 2: a fan comprises a noise reduction volute and an impeller 3. Wherein the noise reduction volute is as shown in embodiment 1, and the impeller 3 is arranged on the noise reduction volute.

Example 3: a range hood comprises a fan. The blower was as in example 2.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments can be modified, or some technical features can be equivalently replaced; the modifications or substitutions do not depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A noise reduction volute comprises a volute body (1) and a volute tongue structure (2) connected to the volute body (1), wherein an airflow channel (11) is formed in the volute body (1);

the sound absorption device is characterized in that the volute tongue structure (2) is provided with a plurality of sound absorption holes (21) communicated with the airflow channel (11) and the interior of the volute tongue structure, and a sound absorption material (22) for blocking the sound absorption holes (21) is arranged in the volute tongue structure (2).

2. The noise reducing volute of claim 1 wherein the volute tongue structure (2) has a surface adhered thereto

A waterproof electroacoustic membrane (23) covering the muffling hole (21) is incorporated, the waterproof electroacoustic membrane (23) being permeable to noise and impermeable to oil stains.

3. The noise reducing volute according to claim 2, wherein the inner space of the volute tongue structure (2) is completely filled with a sound absorbing material (22).

4. The noise reducing volute according to claim 2, wherein the volute tongue structure (2) has an inner space partially filled with a sound absorbing material (22) and partially filled with an air layer (25).

5. The noise reduction volute according to claim 2, wherein the volute tongue structure (2) comprises a curved plate (2-1) and a noise reduction box (2-2), the curved plate (2-1) is connected to the volute body (1) and is formed with a mounting groove (2 k), the noise reduction box (2-2) is embedded in the mounting groove (2 k), and the sound absorption material (22) is arranged in the noise reduction box (2-2).

6. The de-noising volute according to claim 5, wherein the muffling holes (21) are provided in a curved plate (2-1), the de-noising box (2-2) is provided with windows (24) at locations corresponding to the muffling holes (21), and the waterproof electro-acoustic membrane is attached to the curved plate (2-1).

7. The noise reduction volute according to claim 5, wherein the noise reduction hole (21) is formed in the noise reduction box (2-2), the curved plate (2-1) is provided with a window (24) at a position corresponding to the noise reduction hole (21), and the waterproof electroacoustic membrane (23) is embedded in the window (24) and attached to the noise reduction box (2-2).

8. The volute of claim 5, wherein the noise reduction box (2-2) is provided with a detachably connected box cover (2-3) at a position far away from the curved plate (2-1).

9. A fan, characterized by comprising a noise reducing volute according to any of claims 1-8, an impeller (3) arranged on the noise reducing volute.

10. A range hood, characterized by comprising the fan of claim 9.

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