Fan assembly and range hood applying same

Abstract

The utility model discloses a fan assembly and a range hood applying the fan assembly, the fan assembly comprises a centrifugal fan and a sound absorption box, the centrifugal fan comprises a volute, the sound absorption box comprises a frame, and the frame is fixed on the outer side of the volute; the sound absorption box further comprises a reinforcing rib assembly arranged in an area defined by the frame, the reinforcing rib assembly comprises a first reinforcing rib and a second reinforcing rib which are arranged in a crossed mode, when the axis of the centrifugal fan extends horizontally, a first included angle alpha is formed between the first reinforcing rib and the horizontal direction, and a second included angle alpha is formed between the second reinforcing rib and the horizontal direction. A second included angle beta is formed between the second reinforcing rib and the horizontal direction, and the value range of alpha and the value range of beta are both 0 degree and 90 degrees.

Description

Technical Field

[0001] The utility model relates to a power device, in particular to a fan assembly and a range hood using the fan assembly. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It can quickly extract the waste from stove combustion and the fumes generated during cooking and discharge them outdoors, reducing pollution and purifying the air.

[0003] Range hood noise has become an increasingly prominent problem, leading to the widespread use of sound-absorbing cotton. Currently, there are many ways to secure sound-absorbing cotton, but to ensure the long-term effectiveness of the cotton, a sound-absorbing box is often used to form a sound-absorbing cotton assembly kit, as disclosed in the applicant's Chinese patent application number 202122994200.1.

[0004] However, range hoods produce a lot of oil smoke, which can be absorbed by the surface of the sound-absorbing cotton, affecting its performance. Furthermore, traditional sound-absorbing boxes are generally made of metal for fire resistance, but metal materials and manufacturing costs are high, and sheet metal details are difficult to shape, easily creating dead corners where oil can drip, affecting normal use and posing a safety hazard. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide a fan assembly to reduce oil dripping in view of the deficiencies in the above-mentioned prior art.

[0006] The second technical problem to be solved by the present invention is to provide a range hood using the fan assembly as described above.

[0007] The technical solution adopted by the present invention to solve the first technical problem is: a fan assembly, including a centrifugal fan and a sound-absorbing box, wherein the centrifugal fan includes a volute, and the sound-absorbing box includes a frame, and the frame is fixed to the outside of the volute; the characteristics are:

[0008] The sound-absorbing box also includes a reinforcing rib assembly arranged in the area surrounded by the border, and the reinforcing rib assembly includes a first reinforcing rib and a second reinforcing rib arranged crosswise. When the centrifugal fan is arranged vertically with its axis extending horizontally, a first angle α is formed between the first reinforcing rib and the horizontal direction, and a second angle β is formed between the second reinforcing rib and the horizontal direction. The value ranges of α and β are both (0°, 90°).

[0009] By providing a reinforcing rib assembly, the strength of the sound-absorbing box can be enhanced and airflow can be easily passed through. In addition, the first reinforcing rib and the second reinforcing rib are not in a horizontal or vertical state. Therefore, when oil drops onto the reinforcing rib assembly, due to the gravity of the oil droplets, the oil will follow the angle with the horizontal direction and will not easily hang on the first reinforcing rib and the second reinforcing rib, thereby reducing the risk of oil dripping.

[0010] Preferably, the first reinforcing rib and the second reinforcing rib are perpendicular to each other and satisfy α=β=45°.

[0011] In order to facilitate the fixation of the sound absorbing box and the volute, fixing holes for fixing the sound absorbing box and the volute are formed on the frame.

[0012] Furthermore, when the centrifugal fan is arranged vertically with its axis extending horizontally, the fixing hole is located at the bottom of the entire sound-absorbing box, and the upper edge of the fixing hole gradually slopes downward from the side away from the volute toward the volute. As a result, when oil flows into the fixing hole, it flows downward along the inclined upper edge, avoiding oil contamination.

[0013] Furthermore, to facilitate the placement of sound-absorbing cotton, the sound-absorbing box also includes a flange, which extends along the outer edge of the frame toward the volute. An installation gap for placing sound-absorbing cotton is formed between the frame of the sound-absorbing box, the reinforcement rib assembly and the volute.

[0014] Furthermore, the centrifugal fan further includes an impeller disposed in the volute and a motor for driving the impeller to rotate;

[0015] The volute includes a first cover plate and a second cover plate spaced apart along the axis of the centrifugal fan, an annular wall connecting the first cover plate and the second cover plate, an air inlet being formed on the first cover plate, and the motor extending into the volute from a side portion outside the second cover plate;

[0016] The sound absorbing box is at least arranged on a side of the first cover plate away from the second cover plate.

[0017] Furthermore, the sound absorbing box is partially arranged around the air inlet to facilitate the arrangement of the sound absorbing box and avoid interfering with the air intake.

[0018] The technical solution adopted by the present invention to solve the second technical problem is: a range hood, characterized in that: the fan assembly as described above is applied.

[0019] Compared with the prior art, the advantages of the present invention are: by providing a reinforcing rib assembly, the strength of the sound-absorbing box can be enhanced and the airflow can be facilitated; in addition, the first reinforcing rib and the second reinforcing rib are not in a horizontal or vertical state. Therefore, when oil drops onto the reinforcing rib assembly, due to the gravity of the oil droplets, the oil will follow the angle with the horizontal direction and will not easily hang on the first reinforcing rib and the second reinforcing rib, thereby reducing the risk of oil dripping. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the fan assembly according to an embodiment of the present utility model;

[0021] Figure 2 This is a front view of a fan assembly according to an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the exploded structure of the fan assembly according to an embodiment of the present invention;

[0023] Figure 4 for Figure 3 A schematic diagram of the partial I enlargement;

[0024] Figure 5 A cross-sectional view of a fan assembly according to an embodiment of the present invention;

[0025] Figure 6 This is a front view of the sound-absorbing box of the fan assembly according to an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0028] See also Figures 1 to 6 , shows a fan assembly, which can be mainly used for range hoods, and can also be used in other occasions requiring similar power devices.

[0029] The fan assembly includes a centrifugal fan 1 and a sound-absorbing box 2. The centrifugal fan 1 includes a volute 11, an impeller 12 disposed within the volute 11, and a motor 13 for driving the impeller 12. The volute 11 includes a first cover plate 111 and a second cover plate 112 spaced apart along the axis X of the centrifugal fan 1. An annular wall 113 is connected between the first cover plate 111 and the second cover plate 112. An air inlet 114 is defined on the first cover plate 111. The first cover plate 111, the second cover plate 112, and the annular wall 113 define an air outlet 115. The second cover plate 112 may also include an air inlet, thereby forming a dual-inlet fan. The impeller 12 is disposed within the volute 11. The motor 13 extends from a side portion outside the second cover plate 112 into the volute 11. The motor 13 is in transmission connection with the impeller 12, thereby driving the impeller 12 to rotate. The structure of the centrifugal fan 1 described above is prior art and will not be described in detail here.

[0030] The sound absorbing box 2 is arranged on the side of the first cover plate 111 away from the second cover plate 112, and is partially arranged around the air inlet 114. Here, partially surrounding means that the sound absorbing box 2 is arranged in a partial area of the periphery of the air inlet 114. The sound absorbing box 2 is preferably made of plastic to facilitate forming the required shape. The sound absorbing box 2 includes a frame 21, a reinforcing rib assembly 22, a flange 23 and a fixing hole 24. The flange 23 extends along the outer edge of the frame 21 toward the first cover plate 111, and is thereby fixed to the volute 11. Since the flange 23 has a certain width, an installation gap 25 is formed between the frame 21, the reinforcing rib assembly 22 of the sound absorbing box 2 and the first cover plate 111 of the volute 11, and the installation gap 25 can be used to place sound-absorbing cotton (not shown).

[0031] The reinforcing rib assembly 22 is disposed within the area enclosed by the frame 21 and includes a first reinforcing rib 221 and a second reinforcing rib 222. Both of the first and second reinforcing ribs 221 and 222 form a certain angle with respect to the axis X of the centrifugal fan 1, and are neither parallel nor perpendicular. The first and second reinforcing ribs 221 and 222 are disposed crosswise and, preferably, perpendicular to each other. There can be at least two first and second reinforcing ribs 221 and 222, respectively.

[0032] The fixing holes 24 are formed on the frame 21 , and there may be multiple fixing holes 24 , one of which is located at the bottom of the entire sound absorbing box 2 .

[0033] Assuming the axis X of the centrifugal fan 1 extends horizontally, the centrifugal fan 1 is arranged vertically. Vertical arrangement is relative to horizontal arrangement. In vertical arrangement, the axis X is horizontal, and the air outlet 115 is upward. In horizontal arrangement, the air inlet 114 is downward, the axis X is vertical, and the air outlet 115 is located laterally. The first reinforcing rib 221 forms a first angle α with the horizontal direction, and the second reinforcing rib 222 forms a second angle β with the horizontal direction. The values of α and β are both within the range of (0°, 90°). Preferably, α = β = 45°. The fixing hole 24 at the bottom of the sound-absorbing box 2 has an upper edge 241 extending to the inner side of the frame 21, and its lower edge penetrates the flange 23 at the corresponding position. Fasteners such as screws can be passed through the fixing hole 24 to secure the sound-absorbing box 2 to the volute 11. The upper edge 241 of the fixing hole 24 gradually tilts downward from the side away from the volute 11 toward the volute 11, and the tilt angle can preferably be 60°.

[0034] Therefore, when oil drips onto the reinforcing rib assembly 22, due to the gravity of the oil droplet, the oil will follow the 45-degree angle edge and will not easily get stuck on the first reinforcing rib 221 and the second reinforcing rib 222. When the oil flows to the fixing hole 24, it will easily flow downward along the inclined upper edge 241 to avoid getting stuck.

Claims

1. A fan assembly, comprising a centrifugal fan (1) and a sound absorbing box (2), wherein the centrifugal fan (1) comprises a volute (11), and the sound absorbing box (2) comprises a frame (21), wherein the frame (21) is fixed to the outside of the volute (11); characterized in that: The sound absorbing box (2) further comprises a reinforcing rib assembly (22) arranged in an area enclosed by the frame (21), the reinforcing rib assembly (22) comprising a first reinforcing rib (221) and a second reinforcing rib (222) arranged crosswise, and when the centrifugal fan (1) is arranged vertically with the axis (X) extending horizontally, a first angle α is formed between the first reinforcing rib (221) and the horizontal direction, and a second angle β is formed between the second reinforcing rib (222) and the horizontal direction, and the value ranges of α and β are both (0°, 90°).

2. The fan assembly according to claim 1, characterized in that: The first reinforcing rib (221) and the second reinforcing rib (222) are perpendicular to each other and satisfy α=β=45°.

3. The fan assembly according to claim 1, characterized in that: The frame (21) is provided with fixing holes (24) for fixing the sound absorbing box (2) and the volute (11).

4. The fan assembly according to claim 3, characterized in that: When the centrifugal fan (1) is arranged vertically with the axis (X) extending horizontally, the fixing hole (24) is located at the bottom of the entire sound-absorbing box (2), and the upper edge (241) of the fixing hole (24) gradually tilts downward from the side away from the volute (11) toward the volute (11).

5. The fan assembly according to claim 1, characterized in that: The sound absorbing box (2) further comprises a flange (23), wherein the flange (23) extends along the outer edge of the frame (21) in the direction of the volute (11), and an installation gap (25) for placing sound absorbing cotton is formed between the frame (21) of the sound absorbing box (2), the reinforcing rib assembly (22) and the volute (11).

6. The fan assembly according to claim 1, characterized in that: The centrifugal fan (1) further includes an impeller (12) disposed in the volute (11) and a motor (13) for driving the impeller (12) to rotate; The volute (11) comprises a first cover plate (111) and a second cover plate (112) arranged at intervals along the axis (X) of the centrifugal fan (1); a ring wall (113) is connected between the first cover plate (111) and the second cover plate (112); an air inlet (114) is provided on the first cover plate (111); and the motor (13) extends from a side portion outside the second cover plate (112) into the volute (11); The sound absorbing box (2) is at least arranged on a side of the first cover plate (111) away from the second cover plate (112).

7. The fan assembly according to claim 6, characterized in that: The sound absorbing box (2) is partially arranged around the air inlet (114).

8. A range hood, characterized in that: The invention is applied to a fan assembly as claimed in any one of claims 1 to 7.

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