CN106438485A - Volute of extractor hood and extractor hood - Google Patents

Abstract

The invention discloses a volute of a range hood and the range hood. The volute of the range hood comprises: an outer plate; The arc section of the head and the arc section of the tail distributed in the flow direction of the airflow in the volute, the arc section of the head is connected with the arc section of the tail, and the arc section of the head is connected with the outer plate The angle between them is larger than the angle between the tail arc segment and the outer plate, and the arc length of the head arc segment is smaller than the arc length of the tail arc segment. In this way, the wind pressure can be effectively increased, and the balance of the airflow can be increased, so that the aerodynamic noise and vibration caused by the inhomogeneity of the airflow can be minimized, so as to achieve the purpose of vibration reduction and noise reduction, and further satisfy the market and consumers' demand for oil fume. machine needs.

Description

The volute of the range hood and the range hood

technical field

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

Background technique

In related technologies, there are several mainstream directions for noise reduction of range hoods, including active noise reduction, noise reduction with sound-absorbing materials, and applying drainage devices in the flow channel. Considering the cost and the source of noise reduction, the first two methods are usually only used in range hoods as auxiliary means. For the noise reduction of drainage devices that are widely used, it is usually possible to add some structures to the existing models. For the main parts of the range hood, such as the volute, case, panel, etc., there is less pressure to reopen. The common drainage device can dredge the air flow passing through, reduce the aerodynamic noise caused by the uneven pressure and the structural vibration caused by it.

However, most of the drainage devices are vertical plate-shaped thin-walled structures, which are prone to tremors and introduce additional structural vibrations due to the action of non-uniform airflow in the air duct. Severe deformation may disturb the airflow, but increase aerodynamic noise. In addition, since there is airflow passing through both sides of the vertical plate, even if the structural arrangement is reasonable to achieve the effect of noise reduction, it may cause a large pressure loss due to the significantly increased friction on both sides of the vertical plate.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, the present invention proposes a volute for a range hood, the volute has better structural reliability and can better reduce the noise of the range hood.

The present invention further provides a range hood.

According to the volute of the range hood of the present invention, it includes: an outer plate; a drainage member, the drainage member is arranged on the inner surface of the outer plate and includes: a head distributed in the flow direction of the airflow in the volute An arc segment and a tail arc segment, the head arc segment is connected to the tail arc segment, and the angle between the head arc segment and the outer plate is larger than the tail arc segment and the tail arc segment The included angle between the outer plates and the arc length of the head arc segment are smaller than the arc length of the tail arc segment.

According to the volute of the range hood of the present invention, the drainage member protrudes inward from the inner surface of the outer plate, so that the protruding drainage member can further reduce the space in the volute and effectively increase the wind pressure. At the same time, by providing the flow guide with the above structure, the area of the corresponding area of the flow guide and the airflow contact surface of the circular outer plate is slightly increased, so that the area of contact friction with the airflow can be reduced. Therefore, compared with the pressure increase caused by the reduced space in the volute, it is a small amount, and overall, the reduction of wind pressure can be effectively avoided. In addition, the large vortex formed by the airflow flowing out of the impeller blades will be broken by the drainage piece protruding from the outer plate. The resulting aerodynamic noise and vibration are minimized to achieve the purpose of vibration reduction and noise reduction, and further meet the needs of the market and consumers for range hoods.

In addition, the volute of the range hood according to the present invention may also have the following distinguishing technical features:

In some examples of the present invention, the drainage member includes: a drainage piece, and the drainage piece includes the head arc segment and the tail arc segment.

In some examples of the present invention, the drainage sheet is glued on the inner surface of the outer plate.

In some examples of the present invention, a limiting hole is provided on the outer plate, and the head of the drainage sheet fits in the limiting hole.

In some examples of the present invention, the drainage member further includes: side plates, the side plates are disposed on both sides of the drainage sheet and connected to the inner surface of the outer plate.

In some examples of the present invention, the outer edge of the side plate is the same as the arc of the inner surface of the outer plate, and the inner edge of the side plate is the same as the arc of the drainage sheet.

In some examples of the present invention, there are a plurality of flow guiding elements and they are distributed along the flow direction of the airflow in the volute.

In some examples of the present invention, in the flow direction of the airflow in the volute, the arc length of the outer plate corresponding to each of the air guides becomes gradually larger.

In some examples of the present invention, the arc lengths of the outer plates spaced between two adjacent flow guide members are the same.

The range hood according to the present invention includes the above-mentioned volute of the range hood.

The beneficial effect of the range hood is the same as that of the above-mentioned volute of the range hood, and will not be described in detail here.

Description of drawings

Figure 1 is a perspective view of a volute according to an embodiment of the present invention;

Figure 2 is a side view of a volute according to an embodiment of the present invention;

Fig. 3 is a perspective view of multiple drains;

Fig. 4 is a side view of multiple drains;

Fig. 5 is a side view of a volute according to another embodiment of the present invention.

Reference signs:

volute 10;

Outer plate 1; limit hole 11;

Drainage piece 2 ; drainage piece 21 ; head arc section 21 a ; tail arc section 21 b ; side plate 22 .

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

The volute 10 of the range hood according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

The volute 10 of the range hood according to the embodiment of the present invention may include: an outer plate 1 and a draining member 2, wherein the draining member 2 is arranged on the inner surface of the outer plate 1, and the draining member 2 can be guided in the space inside the outer plate 1 Airflow, which reduces aerodynamic noise caused by pressure inhomogeneities and the resulting structural vibrations.

Moreover, the air guide 2 includes: a head arc segment 21a and a tail arc segment 21b distributed in the flow direction of the airflow in the volute 10, and the head arc segment 21a and the tail arc segment 21b are connected. Wherein, the flow direction of the airflow in the volute 10 can be the direction of the arrow shown in FIG. The head arc segment 21a and the tail arc segment 21b, so that the airflow can first pass through the head arc segment 21a and then flow to the tail arc segment 21b.

The angle between the head arc segment 21a and the outer plate 1 is larger than the angle between the tail arc segment 21b and the outer plate 1, and the arc length of the head arc segment 21a is smaller than the arc length of the tail arc segment 21b arc length. It can be understood that the flow guide 2 protrudes inward from the inner surface of the outer plate 1 , so that the protruding flow guide 2 can further reduce the space in the volute 10 and effectively increase the wind pressure. At the same time, by arranging the airflow member 2 with the above structure, the area of the airflow contact surface of the airflow member 2 and the corresponding area of the arc outer plate 1 is slightly increased, so that the area of contact friction with the airflow can be reduced. Therefore, compared with the pressure increase caused by the reduced space in the volute 10 , it is small, and overall, the reduction of the wind pressure can be effectively avoided. In addition, the large vortex formed by the airflow flowing out of the impeller blades will be broken by the flow guide part 2 protruding from the outer plate 1, and at the same time, the arc section 21b at the tail can help the airflow to pass through the volute 10 smoothly, thereby increasing the balance of the airflow, so that due to The aerodynamic noise and vibration caused by the uneven airflow are minimized, achieving the purpose of reducing vibration and noise, and further meeting the needs of the market and consumers for range hoods.

According to a preferred embodiment of the present invention, as shown in FIG. 1 and FIG. 2 , the drainage member 2 may include: a drainage piece 21 , and the drainage piece 21 includes a head arc segment 21 a and a tail arc segment 21 b. By arranging the drain piece 21 in a sheet shape, the weight of the drain piece 2 and the volute 10 can be reduced at least to a certain extent, and the overall structural reliability of the range hood can be ensured. Moreover, it is easy to design the head arc segment 21 a and the tail arc segment 21 b on the drainage sheet 21 , which can reduce the production cost and improve the production efficiency of the drainage sheet 21 .

Optionally, the drainage sheet 21 can be glued on the inner surface of the outer panel 1 . For example, the drainage sheet 21 can be bonded on the inner surface of the outer panel 1 by an adhesive, which can reduce the installation difficulty of the drainage sheet 21, and because of the large bonding area, can reduce the extra tremor problem caused by the low strength of the structural material , thus avoiding unnecessary structural vibration and noise.

Further, as shown in FIG. 1 , a limiting hole 11 may be provided on the outer panel 1 , and the head of the drainage piece 21 fits in the limiting hole 11 . For example, the head of the drainage sheet 21 can be provided with a positioning foot, and the positioning foot can be inserted into and matched with the limit hole 11, so that the drainage sheet 21 can be better fixed on the outer plate 1, and the deformation of the drainage sheet 21 can be avoided. , thereby ensuring the overall structural reliability of the volute 10 . Moreover, this fixing method is simple, convenient and efficient. In addition, by fixing the head of the drain sheet 21, the reliability of the drain sheet 21 on the outer panel 1 can be better improved.

Optionally, as shown in FIG. 1 , FIG. 2 and FIG. 5 , the drainage member 2 may also include: side plates 22 arranged on both sides of the drainage sheet 21 , and the side plates 22 and the inner surface of the outer panel 1 connected. Wherein, the side plate 22 can play the role of supporting the drain piece 21, thereby improving the installation reliability of the drain plate 21 on the outer plate 1, and the side plate 22 can also play the role of preventing air leakage, that is, the side plate 22 can prevent The air flow passes through both sides of the flow guide piece 21 , which can avoid the noise generated by the air flow and improve the structural reliability of the volute 10 .

Preferably, as shown in FIG. 4 and FIG. 5 , the outer edge of the side plate 22 has the same arc shape as the inner surface of the outer plate 1 , and the inner edge of the side plate 22 has the same arc shape as the drain piece 21 . In this way, the shape of the side plate 22 can be adapted to the outer plate 1 and the drain sheet 21, thereby improving the structural reliability of the drain member 2, and improving the reliability and reliability of the cooperation between the drain member 2 and the outer plate 1. Appearance aesthetics.

It should be noted that, in order to guide the airflow better, as shown in FIG. 1 , FIG. 2 and FIG. 5 , there may be multiple airflow guides 2 , and the multiple airflow guides 2 are distributed in the flow direction of the airflow in the volute 10 . As shown in FIG. 1 and FIG. 2 , there may be four drainage pieces 2 , and as shown in FIG. 5 , there may be three drainage pieces 2 . Of course, in practical applications, the size, quantity, and arrangement position of the drainage pieces 21 can be designed in combination with the specific structure of the volute 10 of different types of range hoods, so as to achieve the best effect of vibration reduction and noise reduction.

Further, in the flow direction of the airflow in the volute 10 , the arc length of the outer plate 1 corresponding to each air guiding member 2 gradually increases. As shown in FIG. 3 and FIG. 4 , the plurality of flow guides distributed from left to right are arranged according to the flow direction of the airflow in the volute 10 . In this way, each air-guiding member 2 can better guide the airflow at its own position, and can improve the noise reduction effect of the entire volute 10, and can improve the quality of the range hood.

Wherein, the transition position between the head arc segment 21a and the tail arc segment 21b of the drain piece 21 is the farthest position of the drain plate 21 from the outer plate 1, and in the flow direction of the airflow in the volute 10, each drain plate The farthest distance from 21 to the outer plate 1 is also gradually increased, so that the drainage piece 21 can better break up the large vortex, and can effectively reduce the noise of the range hood.

The arc lengths of the outer panels 1 spaced between two adjacent flow guiding elements 2 are the same. By reasonably setting the distance between the two flow guides 2 , the range that each flow guide 2 can conduct can be approached, thereby reducing the aerodynamic noise caused by the uneven pressure.

The range hood according to the embodiment of the present invention includes the volute 10 of the range hood in the above embodiment.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structure, material or characteristic is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (10)

1. a kind of spiral case of range hood is it is characterised in that include：

Outside plate；

Drainage part, described drainage part is arranged on the inner surface of described outside plate and includes：In described spiral case interior air-flow flow direction The head arc section of upper distribution and afterbody arc section, described head arc section is connected with described afterbody arc section, described head circle Angle between segmental arc and described outside plate is more than angle and described head circular arc between described afterbody arc section and described outside plate The arc length of section is less than the arc length of described afterbody arc section.

2. the spiral case of range hood according to claim 1 is it is characterised in that described drainage part includes：Drainage piece, described Drainage piece includes described head arc section and described afterbody arc section.

3. the spiral case of range hood according to claim 2 is it is characterised in that described drainage piece is bonded in described outside plate On inner surface.

4. the spiral case of range hood according to claim 2 is it is characterised in that be provided with spacing hole on described outside plate, institute The head fits stating drainage piece are at described spacing hole.

5. the spiral case of range hood according to claim 2 is it is characterised in that described drainage part also includes：Side plate, described Side plate is arranged on the both sides of described drainage piece and is connected with the inner surface of described outside plate.

6. the spiral case of range hood according to claim 5 is it is characterised in that the outward flange of described side plate and described outside plate Inner surface arc identical, the inward flange of described side plate is identical with the arc of described drainage piece.

7. the spiral case of the range hood according to any one of claim 1-6 is it is characterised in that described drainage part is multiple And be distributed on described spiral case interior air-flow flow direction.

8. the spiral case of range hood according to claim 7 is it is characterised in that in described spiral case interior air-flow flow direction On, the arc length of each described outside plate corresponding to described drainage part becomes larger.

9. the spiral case of range hood according to claim 7 is it is characterised in that between adjacent two described drainage parts Every described outside plate arc length identical.

10. a kind of range hood is it is characterised in that include the snail of the range hood according to any one of claim 1-9 Shell.