Dual outlet air passage fan and range hood

Abstract

The application relates to the technical field of range hood, and discloses a fan with double air outlet channels and a range hood. The fan with double air outlet channels comprises a volute, the volute comprises a bottom plate, two spiral shells, a guide plate and a partition plate, the two spiral shells, the guide plate and the partition plate are fixedly arranged on the top surface of the bottom plate, the inner side walls of the two spiral shells are enclosed to form volute air ducts, two groups of air inlets are arranged on the bottom plate and are communicated with the two volute air ducts respectively, the two ends of the guide plate are connected with the two spiral shells respectively, the volute has two air outlet channels which are separated by the partition plate, one end of each of the two air outlet channels is communicated with the air outlet of each of the two volute air ducts, the other end of each of the two air outlet channels is closed by the guide plate, and the top of each of the two air outlet channels forms an air outlet opening. The two air outlet channels are independent of each other, the flow resistance of the airflow is reduced, and the overall air volume of the fan is improved.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a fan and range hood with dual air outlet channels. Background Technology

[0002] Range hoods are essential electrical appliances in the kitchen used to remove cooking fumes. To accommodate the two burners typically found on stoves, existing range hoods are usually equipped with two impellers to meet the smoke extraction needs of each burner.

[0003] For example, Chinese utility model patent CN204985080U discloses a similar fan structure. In this patent document, the air outlets of the two volutes are interconnected. When the two impellers work simultaneously, the two airflows are prone to interfere with each other at the interconnected air outlets, thereby increasing flow resistance and reducing the overall air volume of the fan. Summary of the Invention

[0004] This invention provides a fan and range hood with dual air outlet channels. The two air outlet channels are independent of each other, which reduces the flow resistance of the airflow and increases the overall air volume of the fan.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] According to a first aspect of the present invention, an embodiment of the present invention provides a fan with dual air outlet channels, including a volute. The volute includes a base plate, two spiral shells, a guide plate, and a partition. The two spiral shells, the guide plate, and the partition are all fixedly disposed on the top surface of the base plate. The inner sidewalls of the two spiral shells are enclosed to form volute air ducts. The base plate is provided with two sets of air inlets that are respectively connected to the two volute air ducts. The two ends of the guide plate are respectively connected to the two spiral shells. The volute has two air outlet channels separated by the partition. One end of the two air outlet channels is respectively connected to the air outlet of the two volute air ducts. The other end of the two air outlet channels is closed by the guide plate. An air outlet opening is formed at the top of the two air outlet channels.

[0007] In some embodiments, the partition forms one sidewall of the air outlet channel; the spiral shell forms the other sidewall of the air outlet channel; or, the air guide plate forms the other sidewall of the air outlet channel; or, the spiral shell and the air guide plate together form the other sidewall of the air outlet channel.

[0008] In some embodiments, the outwardly extending ends of the two spiral shells are connected to each other, one end of the partition is sealed to the connection end of the outwardly extending ends of the two spiral shells, and the other end of the partition is sealed to the air guide plate.

[0009] In some embodiments, the air guide plate is symmetrically arranged relative to the partition plate, and the two spiral shells are also symmetrically arranged relative to the partition plate.

[0010] In some embodiments, the air guide plate includes an air guide portion located at its bottom, the air guide portion being connected to the base plate, and the air guide portion gradually bending upwards in the direction from the air outlet of the volute air duct to the air guide plate along the air outlet channel.

[0011] In some embodiments, the cross-sectional shape of the air guide is an arc shape.

[0012] In some embodiments, the air guide plate is located behind the air outlet of the volute air duct, and the air outlet duct extends rearward.

[0013] In some embodiments, the inner walls of both spiral shells are designed with an Archimedes curve, and the ratio of the width b of the air outlet of the volute air duct to the initial radius a of the inner wall of the spiral shell is 0.81-0.85.

[0014] According to a second aspect of the present invention, an embodiment of the present invention provides a range hood, including a smoke collection hood and a fan with a dual air outlet channel as described in any of the first aspects above, fixed within the smoke collection hood.

[0015] In some embodiments, the smoke hood includes a top plate located on top of it, the volute is fixed to the bottom surface of the top plate, the top plate covers the volute, and the top plate is provided with a smoke exhaust port communicating with the air outlet.

[0016] The present invention has at least the following beneficial effects: the volute of the present invention has two air outlet channels separated by a partition, the other end of the two air outlet channels is closed by a guide plate, and the top of the two air outlet channels forms an air outlet opening, which makes the two air outlet channels independent of each other, and the airflow in the air outlet channels will not interfere with each other, thereby reducing the flow resistance of the airflow and increasing the overall air volume of the fan. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a fan with dual air outlet channels according to an embodiment of the present invention;

[0018] Figure 2 This is a top view schematic diagram of a fan with dual air outlet channels according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of a fan with dual air outlet channels according to another embodiment of the present invention, viewed from the bottom.

[0020] Figure 4 This is a schematic diagram of the structure of a fan with dual air outlet channels according to another embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention.

[0022] The attached figures are labeled as follows:

[0023] Air inlet 101, base plate 110, spiral shell 120, air guide plate 130, air guide section 131, partition 140, volute air duct 150, air outlet 151, air outlet channel 160, impeller 170.

[0024] Smoke hood 200, top plate 210, smoke exhaust port 220. Detailed Implementation

[0025] The present invention is provided below with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0026] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0028] Embodiments of the present invention provide a fan with dual air outlet channels, such as... Figure 1 and Figure 2 As shown, the system includes a volute, which comprises a base plate 110, two spiral shells 120, an air guide plate 130, and a partition plate 140. The two spiral shells 120, air guide plate 130, and partition plate 140 are all fixedly mounted on the top surface of the base plate 110. The inner walls of the two spiral shells 120 enclose a volute air duct 150, thus forming two volute air ducts 150. The base plate 110 has two sets of air inlets 101, each communicating with one of the two volute air ducts 150. Specifically, one set of air inlets 101 communicates with one of the volute air ducts 150, and the other set communicates with the other volute air duct 150. Each set of air inlets 101 may include one or more air inlets 101, the shape, number, and size of which can be determined according to actual needs. Both volute air ducts 150 have air outlets 151, and the airflow within the volute air ducts 150 flows towards the air outlets 151.

[0029] The two ends of the air guide plate 130 are respectively connected to two spiral shells 120. The spiral shell has two air outlet channels 160 separated by a partition plate 140. One end of the two air outlet channels 160 is connected to the air outlet 151 of the two spiral shell air ducts 150 respectively. The other end of the two air outlet channels 160 is closed by the air guide plate 130. The top of the two air outlet channels 160 forms an air outlet opening. Thus, the airflow entering the air outlet channel 160 will flow along the air outlet channel 160 and finally flow out from the air outlet opening.

[0030] In this embodiment, the two air outlet channels 160 are separated by a partition 140, which makes the two air outlet channels 160 independent of each other. The airflow in the air outlet channels 160 will not interfere with each other, reducing the flow resistance of the airflow and increasing the overall air volume of the fan.

[0031] In some embodiments, the air outlet duct 160 has two sidewalls, with a partition 140 forming one sidewall of the air outlet duct 160. The formation of the other sidewall of the air outlet duct 160 will be described below.

[0032] In one implementation, such as Figure 2 As shown, the spiral shell 120 and the air guide plate 130 together form another side wall of the air outlet channel 160. That is, the spiral shell 120 can form a part of the other side wall of the air outlet channel 160, and the air guide plate 130 can form another part of the other side wall of the air outlet channel 160. The spiral shell 120 can form a relatively forward part of the other side wall of the air outlet channel 160, and the air guide plate 130 can form a relatively rearward part of the other side wall of the air outlet channel 160.

[0033] In another embodiment, the spiral shell forms another sidewall of the air outlet channel, and the outer sidewall of the spiral shell can extend along the air outlet channel to the air guide plate, thereby the air guide plate only closes the other end of the air outlet channel.

[0034] In another embodiment, the air guide plate forms another side wall of the air outlet channel. The air guide plate can extend to the air outlet 151 of the volute air duct 150. The air guide plate not only forms another side wall of the air outlet channel, but also seals off the other end of the air outlet channel.

[0035] Furthermore, such as Figure 1 and Figure 2 As shown, the two spiral shells 120 are connected to each other at their outward extending ends. One end of the partition 140 is sealed to the connection end of the two spiral shells 120 at their outward extending ends. The other end of the partition 140 is sealed to the air guide plate 130, so that there is no gap between the spiral shells 120 and the partition 140, and there is no gap between the air guide plate 130 and the partition 140. This prevents the two air outlet channels 160 from being connected and further ensures the independence of the two air outlet channels 160.

[0036] In some embodiments, the air guide plate 130 is symmetrically arranged relative to the partition plate 140, and the two spiral shells 120 are also symmetrically arranged relative to the partition plate 140. This allows the volute air duct 150 and the air outlet duct 160 to be symmetrically arranged, and the airflow velocity blown out from the air outlet openings of the two air outlet ducts 160 is relatively balanced with less mutual interference, which helps to further improve the overall air volume of the fan.

[0037] In some embodiments, such as Figure 1-3 As shown, the air guide plate 130 includes an air guide section 131 located at its bottom. The air guide section 131 is connected to the base plate 110. In the direction from the air outlet 151 of the volute air duct 150 to the air guide plate 130 along the air outlet channel 160, the air guide section 131 gradually bends upward.

[0038] The airflow in the air outlet duct 160 is blown by the air guide plate 130. Some of the airflow will be blown onto the air guide section 131 and move along the air guide section 131. This guides some of the airflow to gradually flow towards the upper air outlet opening, reducing the airflow resistance and making it easier for the airflow to flow towards the air outlet opening, thereby further improving the overall air volume of the fan.

[0039] Furthermore, the cross-sectional shape of the air guide 131 is arc-shaped. The arc-shaped structure is relatively smooth, allowing the airflow to smoothly change direction along the arc-shaped wall, further reducing airflow resistance and increasing the overall airflow of the fan. At the same time, it can also reduce the generation of eddies and reduce airflow noise.

[0040] In some embodiments, such as Figure 1 and Figure 2 As shown, the air guide plate 130 is set in an arc shape. This design limits part of the air outlet to an arc shape, so that it can be adapted to the exhaust port on the smoke collection hood, making it easier for as much oil smoke as possible to directly enter the exhaust port.

[0041] In some embodiments, such as Figure 1 and Figure 2 As shown, the air guide plate 130 is located behind the air outlet 151 of the volute air duct 150, and the air outlet duct 160 extends to the rear. This arrangement results in a relatively short distance for the air outlet duct 160, allowing the fumes to be discharged through the exhaust port as quickly as possible. The two air outlet ducts 160 can be parallel to each other to further reduce mutual interference of airflow.

[0042] In some embodiments, such as Figure 1 and Figure 2 As shown, the inner walls of both spiral shells 120 are designed using Archimedes' curves. The formula for the Archimedes' inward spiral curve is:

[0043] x = (a + b * t) * cos(0 - t * 360),

[0044] y=(a+b*t)*sin(0-t*360).

[0045] Where x is the position of the inner wall of the spiral shell 120 on the x-axis, y is the position of the inner wall of the spiral shell 120 on the y-axis, t is the angle of spiral rotation, b is the width of the air outlet 151 of the volute air duct 150, and a is the initial radius of the inner wall of the spiral shell 120. When the ratio of b / a is 0.81-0.85, the air duct of the whole machine is unobstructed, the airflow obstruction in the air duct is small, and the energy efficiency of the whole machine is high.

[0046] To illustrate its technical effects, several comparative embodiments will be provided below.

[0047] When b=63.1 and a=82, the value of b / a is 0.77, and the tested overall fluid dynamic efficiency (FDE) value is 7.83%.

[0048] When b=64.8 and a=82, the value of b / a is 0.79, and the overall fluid dynamic efficiency (FDE) of the tested machine is 8.02%.

[0049] When b=66.4 and a=82, the value of b / a is 0.81, and the overall fluid dynamic efficiency (FDE) of the tested machine is 9.83%.

[0050] When b=68 and a=82, the value of b / a is 0.83, and the overall fluid dynamic efficiency (FDE) of the tested machine is 10.51%.

[0051] When b=69.7 and a=82, the value of b / a is 0.85, and the overall fluid dynamic efficiency (FDE) of the tested machine is 9.62%.

[0052] When b=71.3 and a=82, the value of b / a is 0.87, and the overall fluid dynamic efficiency (FDE) of the tested machine is 7.95%.

[0053] When b=73 and a=82, the value of b / a is 0.89, and the overall fluid dynamic efficiency (FDE) of the tested machine is 7.72%.

[0054] In addition, a table showing the correspondence between energy efficiency ratings and overall fluid dynamic efficiency (FDE) is also provided.

[0055] Energy efficiency rating FDE hood A FDE hood>28 B 23< FDE hood≤28 C 18< FDE hood≤23 D 13< FDE hood≤18 E 8< FDE hood≤13 F 4< FDE hood≤8 G FDE hood≤4

[0056] Therefore, when the values ​​of b / a are 0.81, 0.83 and 0.85, the overall fluid dynamic efficiency (FDE) values ​​are all greater than 8% and 9.5%, respectively, and the energy efficiency level reaches E level. The overall fluid dynamic efficiency is significantly greater than that of other embodiments, thus achieving the technical effects of unobstructed airflow, less airflow obstruction in the airflow duct, and higher overall energy efficiency.

[0057] In some embodiments, such as Figure 1 and Figure 2 As shown, the air inlet 101 can be a grille opening formed by a grille structure, or it can be as follows: Figure 3 As shown, the opening on the base plate 110 directly forms the air inlet 101.

[0058] In some embodiments, such as Figure 4 As shown, the fan with dual air outlet channels also includes two impellers 170, which are installed in two volute air ducts 150 respectively. When the impellers 170 are working, they can generate airflow that blows into the air outlet channels.

[0059] Embodiments of the present invention also provide a range hood, such as... Figure 5 As shown, it includes a smoke hood 200 and a fan with a dual air outlet channel as described in any of the above embodiments, which is fixed inside the smoke hood 200. For a detailed description of the fan with the dual air outlet channel, please refer to the above embodiments, which will not be repeated here.

[0060] In some embodiments, such as Figure 5 As shown, the smoke hood 200 includes a top plate 210 located at its top, a volute fixed to the bottom surface of the top plate 210, and the top plate 210 covering the volute, specifically covering the opening at the top of the volute. The spiral shell, air guide plate, and partition can all be fixed to or abut against the bottom surface of the top plate 210. The top plate 210 is provided with a smoke exhaust port 220 communicating with the air outlet, so that the airflow blown out from the air outlet will be discharged through the smoke exhaust port 220.

[0061] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the invention. Therefore, those skilled in the art will understand that the foregoing description of various embodiments of the invention is illustrative only and not intended to limit the invention as defined by the appended claims and their equivalents.

Claims

1. A fan with dual air outlet channels, characterized in that: The device includes a volute, which comprises a base plate, two spiral shells, an air guide plate, and a partition plate. The two spiral shells, the air guide plate, and the partition plate are all fixedly mounted on the top surface of the base plate. The inner sidewalls of the two spiral shells enclose each other to form a volute air duct. The base plate is provided with two sets of air inlets that are respectively connected to the two volute air ducts. The two ends of the air guide plate are respectively connected to the two spiral shells. The volute has two air outlet channels separated by the partition plate. One end of each air outlet channel is connected to the air outlet of the two volute air ducts, and the other end of each air outlet channel is closed by the air guide plate. An air outlet opening is formed at the top of each air outlet channel.

2. The fan with dual air outlet channels according to claim 1, characterized in that: The partition forms one side wall of the air outlet channel; the spiral shell forms the other side wall of the air outlet channel, or the air guide plate forms the other side wall of the air outlet channel, or the spiral shell and the air guide plate together form the other side wall of the air outlet channel.

3. The fan with dual air outlet channels according to claim 2, characterized in that: The two spiral shells extend outwards at one end and are connected to each other. One end of the partition is sealed to the connection end of the two spiral shells extending outwards, and the other end of the partition is sealed to the air guide plate.

4. The fan with dual air outlet channels according to claim 1, characterized in that: The air guide plate is symmetrically arranged relative to the partition plate, and the two spiral shells are also symmetrically arranged relative to the partition plate.

5. The fan with dual air outlet channels according to any one of claims 1-4, characterized in that: The air guide plate includes an air guide section located at its bottom, which is connected to the base plate. The air guide section gradually bends upward in the direction from the air outlet of the volute air duct to the air guide plate along the air outlet channel.

6. The fan with dual air outlet channels according to claim 5, characterized in that: The cross-sectional shape of the air guide is arc-shaped.

7. The fan with dual air outlet channels according to any one of claims 1-4, characterized in that: The air guide plate is located behind the air outlet of the volute air duct, and the air outlet duct extends to the rear.

8. The fan with dual air outlet channels according to any one of claims 1-4, characterized in that: The inner walls of both spiral shells are designed with Archimedes curves, and the ratio of the width b of the air outlet of the volute air duct to the initial radius a of the inner wall of the spiral shell is 0.81-0.

85.

9. A range hood, characterized in that: Includes a smoke hood and a fan with a dual exhaust duct as described in any one of claims 1-8, fixed inside the smoke hood.

10. The range hood according to claim 9, characterized in that: The smoke hood includes a top plate located at its top, the volute is fixed to the bottom surface of the top plate, the top plate covers the volute, and the top plate is provided with a smoke exhaust port communicating with the air outlet.

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