CN206929134U - Lampblack absorber spiral case and lampblack absorber - Google Patents

Abstract

The utility model relates to the field of oil fume diversion, in particular to a volute for a range hood and a range hood. The volute for the range hood is formed by interlocking the front volute plate structure and the rear volute plate structure; the front volute plate structure includes: the volute front plate and the volute front panel, and the connection between the two is a curved surface transition ;The rear volute plate structure includes: the volute back plate and the volute rear panel, the connection between the two is a curved surface transition; the front volute plate structure and the rear volute plate structure are set oppositely, the volute front panel and The casing rear wall is connected to form the wall of the volute for the range hood. The volute for the range hood of the utility model is surrounded by the front volute plate structure and the rear volute plate structure, the volute front plate of the front volute plate structure and the curved surface of the volute cowl plate transition, and the rear shell of the rear volute plate structure The curved surface transition between the back plate and the volute rear panel can effectively eliminate the backflow of the airflow inside the original volute, improve efficiency and reduce noise.

Description

Volute for range hood and range hood

technical field

The utility model relates to the field of oil fume diversion, in particular to a volute for a range hood and a range hood.

Background technique

At present, the range hood has become a must-have appliance in the home kitchen. It absorbs the cooking fume and effectively discharges it to the outside, so that the kitchen is free from the trouble of the cooking fume. Among them, the volute of the range hood can collect the gas entering the impeller and discharge it to the outlet of the volute, and the volute plays the role of gas collection and pressure diffusion. In the range hood, the impeller and volute are the core components. The quality of its design plays a decisive role in the overall performance of the range hood.

Fig. 1 is the setting method of the metal volute at present, 9 is the volute of the original technical scheme, 90 is the volute coaming, 91 is the volute outlet flange, 92 is the front plate of the volute, 93 is the back plate of the volute, 94 Be motor support, 95 are volute support. The volute of the original technical solution is made by metal welding or riveting the volute coaming plate, the volute front plate and the volute back plate. After assembly, it is shown in Figure 2a and Figure 2b. Cut Figure 2 according to the angles X1-X1 and X2-X2 respectively, as shown in Figures 3 and 4, eddy currents 96 will appear in actual work. Inside the volute, there is a big difference in the direction of the airflow out of the outlet of the impeller blades. Part of the airflow will flow out of the volute along the volute line, and part of it will hit the volute coaming. The eddy current inside the volute will lose the effective workmanship of the fan system, resulting in lower efficiency, increased noise and other undesirable phenomena.

Utility model content

(1) Technical problems to be solved

The purpose of the utility model is to provide a volute for a range hood and a range hood to solve the problem caused by air flow loss.

(2) Technical solutions

In order to solve the above-mentioned technical problems, the utility model provides a volute for range hood, which is surrounded by interlocking front volute plate structure and rear volute plate structure;

The front volute plate structure includes: a volute front plate and a volute dash panel, and the connection between the two is a curved surface transition;

The rear volute plate structure includes: a volute rear plate and a volute back wall, and the connection between the two is a curved surface transition;

The front volute plate structure is opposite to the rear volute plate structure, and the volute front panel and the volute rear panel are connected to form the volute panel for the range hood.

In some embodiments, preferably, the curved surface transition is an arc surface transition.

In some embodiments, preferably, from the end with the largest curvature to the minimum curvature end of the volute for the range hood, the radii of the arc transitions of the front volute plate structure and the rear volute plate structure increment.

In some embodiments, preferably, from the end with the largest curvature to the minimum curvature end of the volute for the range hood, the radii of the arc transitions of the front volute plate structure and the rear volute plate structure equal.

In some embodiments, it is preferable that, in the direction of the helix from the most curved end to the minimum curved end of the volute for the range hood, the arc surfaces of the front volute plate structure and the rear volute plate structure are The radius of the transition increases in segments, and the radii within the same segment are equal.

In some embodiments, preferably, the transition between two adjacent segments is smooth.

In some embodiments, preferably, the curved surface transition is a streamlined transition.

In some embodiments, preferably, the curved surface transition is an elliptical surface transition.

In some embodiments, preferably, the front volute plate structure and the rear volute plate structure are integrally processed and formed.

In some embodiments, preferably, both the front volute plate structure and the rear volute plate structure are sheet metal integral tensile parts.

In some embodiments, preferably, the connection method of the front volute plate structure and the rear volute plate structure is: the volute front panel and the volute rear panel are welded or riveted.

In some embodiments, it is preferable to further include: a motor bracket, and the motor bracket is integrally processed on the rear volute plate structure.

In some embodiments, preferably, the rear volute plate structure and the motor bracket are sheet metal integral stretched parts.

In some embodiments, preferably, the transition angles of the curved surface transition positions facing the front volute plate structure and the rear volute plate structure are equal.

The utility model also provides a range hood, which comprises the volute for the range hood.

(3) Beneficial effects

According to the technical solution provided by the utility model, the volute for range hood is formed by interlocking the front volute plate structure and the rear volute plate structure. The curved surface transition between the rear casing rear plate and the volute back panel of the rear volute plate structure can effectively eliminate the backflow of the air flow inside the original volute and reduce the loss inside the volute. Increase efficiency and reduce noise.

Description of drawings

Fig. 1 is the structural exploded schematic view of the volute of range hood in the prior art;

Fig. 2 a is the assembly drawing of Fig. 1 solid angle;

Figure 2b is the assembly diagram of the main perspective of Figure 1

Fig. 3 is a schematic diagram of the cross-sectional structure of Fig. 2b at an angle of X1-X1;

Fig. 4 is a schematic diagram of the cross-sectional structure of Fig. 2b on the angle X2-X2;

Fig. 5 is a schematic exploded view of the structure of the volute for the range hood of the present application;

Fig. 6a is the perspective assembly diagram of Fig. 5;

Fig. 6b is an assembly diagram of the main viewing angle of Fig. 5;

Fig. 7 is a schematic diagram of the cross-sectional structure of Fig. 6b at an angle of X3-X3;

Fig. 8 is a schematic diagram of the cross-sectional structure of Fig. 6b at the angle X4-X4;

Fig. 9 is a schematic structural view of the range hood in an embodiment of the present invention;

Fig. 10 is a schematic structural view of a range hood showing a volute in an embodiment of the present invention.

Note:

The volute structure in the prior art: 9 volute; 90 volute coaming; 91 volute outlet flange; 92 volute front plate; 93 volute back plate; 94 motor bracket;

The volute structure in this technology: 1. The complete range hood; 2. The check valve assembly; 3. The frame assembly; 4. The deflector assembly; 5. The oil cup; 7. The impeller; 100 front volute plate structure; 101 volute outlet flange; 102 rear volute plate structure; 103 motor support; 104 volute support.

detailed description

Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail. The following examples are used to illustrate the utility model, but not to limit the scope of the utility model.

In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a flexible connection. Detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary, and it can be the internal communication of two components. "First", "second", "third" and "fourth" do not represent any sequence relationship, but are only distinguished for convenience of description. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. "Current" at the moment when an action is performed, multiple currents appear in the text, all of which are recorded in real time as time goes by.

Based on the current problem of serious airflow loss in the volute, the utility model provides a volute for a range hood and a range hood

The products, methods, etc. will be described in detail below through basic design, extended design and replacement design.

A volute 10 for a range hood, as shown in Figures 5-10, is formed by interlocking a front volute plate structure 100 and a rear volute plate structure 102; the front volute plate structure 100 includes: a volute front plate and a volute The front wall, the connection between the two is a curved surface transition, the volute front wall is perpendicular to the plane where the volute front plate is located; the rear volute plate structure 102 includes: the volute rear plate and the volute rear wall, both The connection between them is a curved surface transition, and the volute back wall is perpendicular to the plane where the volute back plate is; Connected to form the coaming plate of the volute 10 for the range hood.

Here, the volute 10 is surrounded by the front volute plate structure 100 and the rear volute plate structure 102 , which means that the basic frame structure of the volute 10 for the range hood is surrounded by the two. Of course, the volute 10 for the range hood has at least the following components: a volute outlet flange 101 , a motor support 103 , a volute support 104 and the like. The outlet flange of the volute 10 is arranged at the airflow outlet of the volute 10 surrounded by the front volute plate structure 100 and the rear volute plate structure 102 , and the motor bracket 103 is installed on the rear wall mounting hole of the rear volute plate structure 102 . The volute support 104 is installed at the position where the helicity of the volute 10 is the largest, and plays a role of fixing.

Based on the inside of the volute 10 in FIGS. 1-4 , the direction of the airflow flowing out from the outlet of the blades of the impeller 7 is quite different. A part of the airflow will flow out of the volute 10 along the shape line of the volute 10 , and a part of it will hit the coaming plate of the volute 10 . The 90° right angle between the coaming plate of the volute 10 and the front plate and the back plate of the volute can cause the generation of eddy currents. The eddy current inside the volute 10 will lose the effective workmanship of the fan system, resulting in lower efficiency, increased noise and other undesirable phenomena. This technology adopts curved surface transition, which is different from right-angle transition. Curved surface transition can prevent the two surfaces from having sharp corners at the joint. Phenomenon, reduce the loss of air flow, improve efficiency. Taking the front plate of the volute and the cowl of the volute as an example, the connection is a circular arc for transition. The existence of the arc can effectively eliminate the backflow inside the original volute and reduce the loss inside the volute. The variable adjustable range of the volute section is better, which can better match the air performance of the impeller 7 and the complete machine.

Surface transition is mentioned above, and several implementations of surface transition are given below:

Mode 1, the curved surface transition is arc surface transition.

Mode 2, the surface transition is a streamlined transition.

Mode 3, the transition from a curved surface to an elliptical surface.

Mode 4, the curved surface at the curved surface transition is not limited to a single curved surface, that is, curved surfaces with different degrees of curvature can be joined together by multiple curved surfaces (the curved surface can also be regarded as an arc surface here).

Based on the various implementation methods mentioned above, there are still various transition methods for the difference in specific curvature details. Take the transition from curved surface to arc surface as an example:

Example 1a, from the most curved end of the range hood volute 10 to the minimum curved end, the radiuses of the arc transitions of the front volute plate structure 100 and the rear volute plate structure 102 increase gradually.

This method is applicable to the law that the airflow diffuses and the airflow surface increases as the fluid advances, and the section of the volute 10 can be effectively changed by increasing the radius to form an optimal flow state of the volute 10 . In the figure, R1, R2, R3, R4, and R5 are points on the helix of the volute 10, and the helix of the volute 10 can be understood as an overall linear shape formed by arc transition positions.

Example 1b, from the most curved end to the minimum curved end of the volute 10 for range hoods, the arc transition radii of the front volute plate structure 100 and the rear volute plate structure 102 are equal. Compared with Example 1a, this example differs in that the radius is the same, and the same arc surface transition is used at each position.

Example 1c, from the helix direction from the maximum curvature end to the minimum curvature end of the volute 10 for range hoods, the radii of the arc transitions of the front volute plate structure 100 and the rear volute plate structure 102 increase step by step, the same section The inner radii are equal. This example basically conforms to the combination of method 1 and method 4. In practical operation, the length of each segment is preferably unequal in increasing segments, that is to say, the length of each segment is preferably specifically limited based on the position of the helix and the flow mode of the airflow.

In this example, the number of segments is the smallest, and it approaches the region example 1b; when the number of segments is the largest, it approaches the example 1a.

In this example, the smooth transition between two adjacent sections reduces the loss of airflow between the two sections.

In each embodiment of the present technology, the present technical solution adopts metal sheet metal to manufacture the volute 10 , which is opposite to the plastic part. The structural strength, anti-aging, oil resistance and other properties of sheet metal parts are far superior to those of plastic parts.

The technical solution first aims at the integral stretch forming structure of the metal volute 10 , and secondly aims at the arc transition between the coaming plate of the volute 10 and the front plate and the back plate of the volute. For the original technical solution, in the forming process of the front plate of the volute and the back plate of the volute 10, the R angle around the volute 10 of the two is increased (the R angle is inevitable in sheet metal bending and stretching, and must exist) And carry out the welding and riveting of the volute 10 with the coaming plate. Its effect is essentially the same as the technical solution of the volute 1010, except that the coaming of the volute 10 is isolated.

On the other hand, in the prior art volute in FIGS. 1-4 , during the welding or riveting process of the volute, the surfaces of the front plate and the back plate of the volute often appear uneven, resulting in uneven thickness of the volute. In addition, the forming of the volute coaming, especially the forming of the volute tongue of the volute, is made by sheet metal parts, and its accuracy is difficult to improve. Riveting and welding require long man-hours and a high scrap rate, resulting in high cost of the volute. Both the front volute plate structure 100 and the rear volute plate structure 102 are integrally processed and formed. Compared with the volute in the prior art, the volute 1010 in this technical solution reduces the parts of the volute shroud. The coaming plate of the volute 10 is made into a whole with the front volute plate structure 100 and the rear volute plate structure 102 respectively. For example: the front volute plate structure 100 and the rear volute plate structure 102 are all stretched parts of sheet metal. The front volute plate structure 100 and the rear volute plate structure 102 are sheet metal integral tensile parts. The mold is integrally stretched and manufactured, which greatly improves the manufacturing accuracy and efficiency of the volute 10 . The front volute plate structure 100 and the rear volute plate structure 102 are fixedly connected by processes such as welding and riveting. One-time welding (or riveting, etc.) forming, compared with the two-time welding of the original volute 10, the reduction of procedures is beneficial to the reduction of defective products and the improvement of efficiency. Therefore, the manufacturing process of the volute 10 and the overall performance of the volute 10 are effectively improved.

In actual installation, the volute front panel of the front volute plate structure 100 and the volute rear panel of the rear volute plate structure 102 are welded or riveted. One-time welding can reduce process steps and improve processing efficiency. Of course, in other embodiments, a fixed connection method other than welding or riveting may also be used to achieve connection stability and sealing.

As the motor bracket 103 mentioned above, based on the principles of saving procedures, improving product quality, and reducing defective and waste products, the motor bracket 103 can be integrally processed with the rear volute plate structure 102 . For example: the rear volute plate structure 102 and the motor bracket 103 are sheet metal integral stretched parts. In this way, the parts of the volute 10 are greatly optimized and reduced, and the manufacturing accuracy of the volute 10 can be better improved.

On the other hand, considering that in this technology, the front plate of the volute and the rear plate of the volute need to be kept parallel, and the surrounding plates of the volute 10 should not be twisted as much as possible. Therefore, the front volute plate structure 100 and the rear volute plate The transition angles of the transition positions of the curved surfaces facing the structure 102 are equal. Here, "directly facing" is based on the relative arrangement of the front volute plate structure 100 and the rear volute plate structure 102. A line is drawn on the side of the volute 10, and the line is parallel to the outlet surface of the volute 10. The connection point at the transition of the curved surfaces of the front volute plate structure 100 and the rear volute plate structure 102 , the two connection points form a facing curved surface transition position.

Surface transition is mentioned above, and several implementations of surface transition are given below:

Mode 1, the curved surface transition is arc surface transition.

Mode 2, the surface transition is a streamlined transition.

Mode 3, the transition from a curved surface to an elliptical surface.

Mode 4, the curved surface at the curved surface transition is not limited to a single curved surface, that is, curved surfaces with different degrees of curvature can be joined together by multiple curved surfaces (the curved surface can also be regarded as an arc surface here).

Based on the various implementation methods mentioned above, there are still various transition methods for the difference in specific curvature details. Take the transition from curved surface to arc surface as an example:

Example 1a, from the most curved end of the range hood volute 10 to the minimum curved end, the radiuses of the arc transitions of the front volute plate structure 100 and the rear volute plate structure 102 increase gradually.

This method is applicable to the law that the airflow diffuses and the airflow surface increases as the fluid advances, and the section of the volute 10 can be effectively changed by increasing the radius to form an optimal flow state of the volute 10 . In the figure, R1, R2, R3, R4, and R5 are points on the helix of the volute 10, and the helix of the volute 10 can be understood as an overall linear shape formed by arc transition positions.

Example 1b, from the most curved end to the minimum curved end of the volute 10 for range hoods, the arc transition radii of the front volute plate structure 100 and the rear volute plate structure 102 are equal. Compared with Example 1a, this example differs in that the radius is the same, and the same arc surface transition is used at each position.

Example 1c, from the helix direction from the maximum curvature end to the minimum curvature end of the volute 10 for range hoods, the radii of the arc transitions of the front volute plate structure 100 and the rear volute plate structure 102 increase step by step, the same section The inner radii are equal. This example basically conforms to the combination of method 1 and method 4. In practical operation, the length of each segment is preferably unequal in increasing segments, that is to say, the length of each segment is preferably specifically limited based on the position of the helix and the flow mode of the airflow.

In this example, the number of segments is the smallest, and it approaches the region example 1b; when the number of segments is the largest, it approaches the example 1a.

In this example, the smooth transition between two adjacent sections reduces the loss of airflow between the two sections.

In each embodiment of the present technology, the present technical solution adopts metal sheet metal to manufacture the volute 10 , which is opposite to the plastic part. The structural strength, anti-aging, oil resistance and other properties of sheet metal parts are far superior to those of plastic parts.

The technical solution first aims at the integral stretch forming structure of the metal volute 10 , and secondly aims at the arc transition between the coaming plate of the volute 10 and the front plate and the back plate of the volute. For the original technical solution, in the forming process of the front plate of the volute and the back plate of the volute 10, the R angle around the volute 10 of the two is increased (the R angle is inevitable in sheet metal bending and stretching, and must exist) And carry out the welding and riveting of the volute 10 with the coaming plate. Its effect is essentially the same as the technical solution of the volute 1010, except that the coaming of the volute 10 is isolated.

The utility model also provides a range hood, which includes the aforementioned volute 10 for the range hood. The complete range hood also includes a check valve assembly 2 , a frame assembly 3 , a deflector assembly 4 , an oil cup 5 , a volute 10 , an impeller 7 , a filter screen 8 , and a frame front plate 30 . The frame assembly 33 is connected to the deflector assembly 44 and the check valve assembly 22 . The volute 10 is installed in the frame assembly 33 , the filter screen 88 is arranged at the air inlet of the deflector assembly 44 , and the oil cup 55 is fixedly suspended on the deflector assembly 4 . The impeller 7 and the motor are installed in the volute 10, and the motor rotates to drive the impeller 7 to move, so that the gas enters the inside of the frame through the filter screen 8 and is discharged to the outside of the range hood through the volute 10 and the check valve.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the Within the protection scope of the present utility model.

Claims (11)

1. a kind of lampblack absorber spiral case, it is characterised in that interlocked and surrounded by preceding spiral case harden structure and rear spiral case harden structure；

The preceding spiral case harden structure includes：Spiral case foreboard and spiral case front panel, junction therebetween is surface blending；

Spiral case harden structure includes after described：Spiral case back plate and spiral case squab panel, junction therebetween is surface blending；

The preceding spiral case harden structure and the rear spiral case harden structure are oppositely arranged, the spiral case front panel and the spiral case squab panel It is connected and forms the coaming plate of the lampblack absorber spiral case；

The preceding spiral case harden structure and the rear spiral case harden structure are metal plate one tensioning member；

Also include：Electric machine support, the electric machine support are integrally machined in the rear spiral case harden structure；

Spiral case harden structure and the electric machine support are metal plate one tensioning member after described.

2. lampblack absorber spiral case as claimed in claim 1, it is characterised in that the surface blending is cambered surface transition.

3. lampblack absorber spiral case as claimed in claim 2, it is characterised in that maximum from the flexibility of the lampblack absorber spiral case Hold the increasing radii to flexibility smallest end, the preceding spiral case harden structure and the rear spiral case harden structure cambered surface transition everywhere.

4. lampblack absorber spiral case as claimed in claim 2, it is characterised in that maximum from the flexibility of the lampblack absorber spiral case Hold to flexibility smallest end, the preceding spiral case harden structure and it is described after the cambered surface transition everywhere of spiral case harden structure radius it is equal.

5. lampblack absorber spiral case as claimed in claim 2, it is characterised in that maximum from the flexibility of the lampblack absorber spiral case Hold the hand of helix to flexibility smallest end, the preceding spiral case harden structure and it is described after spiral case harden structure cambered surface transition everywhere Radius segmentation is incremented by, and the radius in same section is equal.

6. lampblack absorber spiral case as claimed in claim 5, it is characterised in that rounding off between adjacent two sections.

7. lampblack absorber spiral case as claimed in claim 1, it is characterised in that the surface blending is flowing transition.

8. lampblack absorber spiral case as claimed in claim 1, it is characterised in that the surface blending is ellipsoid transition.

9. the lampblack absorber spiral case as described in claim any one of 1-8, it is characterised in that the preceding spiral case harden structure and described Spiral case harden structure is to be integrally machined molding structure afterwards.

10. the lampblack absorber spiral case as described in claim any one of 1-8, it is characterised in that the preceding spiral case harden structure and institute The connected mode for stating rear spiral case harden structure is：The spiral case front panel and the spiral case back wall plate weld or riveting.

11. a kind of lampblack absorber, it is characterised in that including the lampblack absorber spiral case described in claim any one of 1-10.