Fan system mounting structure of range hood and range hood

Abstract

The utility model relates to a draught fan system installation structure of a range hood and the range hood. The draught fan system installation structure comprises a draught fan frame and a draught fan, a volute; the connecting plate assembly comprises two first connecting plates and two second connecting plates, each of the first connecting plates and the second connecting plates comprises a first plate and a second plate which are vertically connected, the first plates are connected with the wall plates, and the second plates are connected with the front cover plate or the rear cover plate; the second plate comprises a first side edge, a second side edge located below the first side edge and a third side edge connected with the end of the first side edge and the end of the second side edge, the length of the second side edge is larger than that of the first side edge, and the second side edge gradually inclines upwards in the direction away from the first plate. The third side edge comprises a straight line section extending upwards from the end of the second side edge and an arc-shaped section connected to the upper end of the straight line section and the end of the first side edge, and the straight line section inclines towards the side away from the first plate from bottom to top. The fan system has the advantages of being higher in connection strength and firmer in installation.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a fan system installation structure of a range hood and the range hood. Background Art

[0002] The range hood is a kitchen appliance that purifies the kitchen environment. The fan system is the power component of the range hood. The fan system mainly includes a volute, an impeller, a motor and other parts. The volute is composed of a ring wall, a front cover and a rear cover. The motor is fixed to the volute rear cover through a motor mounting bracket. The motor mounting bracket and the volute rear cover are rigidly connected by welding. The motor is installed on the motor bracket through motor screws and rubber vibration isolation pads. The fan system is fixed to the fan frame through the volute fixing bracket. Therefore, the structural strength of the volute fixing bracket affects the vibration of the fan system transmitted to the fan frame. The stronger the volute fixing structure, the smaller the vibration transmission rate from the fan system to the fan frame through the volute fixing bracket, and the vibration and noise levels perceived by the human body are smaller. On the other hand, the structural strength of the volute fixing bracket also affects the structural strength of the whole machine. If the bracket is not strong enough, the machine will vibrate during operation. Over time, the fixing screws will fall off, causing the structure to loosen, causing structural instability, and causing danger.

[0003] The traditional volute fixing bracket adopts two "J-shaped" volute fixing brackets, with both ends fixed to the volute rear plate and the middle fixed to the fan frame to connect the volute to the fan frame. This type of volute fixing bracket is only fixed on a single component of the fan system (volute rear cover), and the volute rear cover, ring wall, and front cover are connected together by welding points and inserts. In addition, the volute has a certain thickness, which will cause the volute structure installation to be twisted during actual operation and then produce structural pulling, affecting the life of the machine.

[0004] Therefore, the installation structure of the fan system of the existing range hood needs to be further improved. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a fan system installation structure of a range hood with higher connection strength and more secure installation in view of the current status of the prior art.

[0006] The second technical problem to be solved by the utility model is to provide a range hood adopting the above-mentioned fan system installation structure in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: the fan system installation structure of the range hood includes:

[0008] The fan frame includes two wall panels which are arranged at a distance from each other on the left and right sides and extend vertically;

[0009] The fan system comprises a volute, wherein the volute comprises a front cover plate and a rear cover plate arranged in a front-to-back manner and an annular wall connected between the front cover plate and the rear cover plate;

[0010] A connecting plate assembly connected between the fan rack and the fan system;

[0011] The connecting plate assembly includes two first connecting plates respectively connected between the two wall panels and the front cover plate and two second connecting plates respectively connected between the two wall panels and the rear cover plate. The first connecting plate and the second connecting plate both include a first plate and a second plate vertically connected. The first plate is connected to the wall panel, and the second plate is connected to the front cover plate or the rear cover plate. The second plate includes a first side, a second side located below the first side, and a third side connecting the end of the first side and the end of the second side. The length of the second side is greater than the length of the first side, and the second side gradually tilts upward in a direction away from the first plate. The third side includes a straight line segment extending upward from the end of the second side and an arc segment connected to the upper end of the straight line segment and the end of the first side. The straight line segment tilts from bottom to top toward the side away from the first plate.

[0012] As an improvement, in order to further improve the balanced load distribution and enhance the reliability of the connection between the volute and the connecting plate, the angle formed by the second side and the horizontal direction is denoted as α, wherein the value range of α is: 2°≤α≤20°;

[0013] The angle formed by the straight line segment of the third side and the vertical direction is recorded as β, wherein the value range of β is: the angle formed by the intersection of the straight line segment of the third side and the second side is recorded as β, wherein the value range of β is: 100°≤β≤130°.

[0014] As an improvement, in order to match the front and rear cover plate structures of the volute or the corresponding profile, the length of the first side is recorded as L1, and the value range of L1 is: 22mm≤L1≤25mm;

[0015] The length of the second side is recorded as L2, and the value range of L2 is: 53mm≤L2≤55mm;

[0016] The length of the straight line segment of the third side is recorded as L3, and the value range of L3 is: 9mm≤L3≤10mm.

[0017] Considering that the front and rear cover plates of the volute are connected to the annular wall by inserting pieces, in order to avoid the position corresponding to the inserting pieces, the second plate is arranged near the edge of the front cover plate or the edge of the rear cover plate, and the second plate is also provided with an avoidance hole.

[0018] In order to adapt and connect with the wall panel of the wind turbine rack, the first plate is rectangular as a whole, and its length ranges from 38mm≤L≤42mm, and its height ranges from 62mm≤H≤65mm.

[0019] In order to improve the overall strength of the first connecting plate and the second connecting plate and avoid deformation, a first profile recessed toward the area defined between the first plate and the second plate is provided at the connecting position of the first plate and the second plate as a reinforcement portion.

[0020] In order to improve the connection reliability between the connection plate and the wall plate of the wind rack, the first plate has a second profile which partially protrudes toward one side of the wall plate of the wind rack and can fit with the wall plate, and the second profile is provided with a first connection hole.

[0021] In order to avoid deformation of the wall panel of the wind rack and improve the strength of the wall panel, the wall panel of the wind rack has a third pressure profile protruding toward the inside of the wind rack in an area corresponding to the second pressure profile, and the third pressure profile is provided with a second connection hole adapted to the first connection hole.

[0022] Generally, in order to avoid the existence of the connecting plate assembly connecting the volute and the fan occupying the space of the volute, the connecting plate assembly should be located away from the leftmost or rightmost edge of the volute, so as to ensure that the volute can be made as large as possible. Preferably, an impeller is provided in the volute, and the horizontal plane passing through the rotation axis of the impeller is recorded as a reference plane, and the position where the volute is connected to the first connecting plate and the second connecting plate is located below the reference plane.

[0023] The technical solution adopted by the utility model to solve the above-mentioned second technical problem is: a range hood, including a fan frame and a fan system arranged in the fan frame, characterized in that: the fan frame and the fan system are assembled together using the above-mentioned fan system installation structure of the range hood.

[0024] Compared with the prior art, the advantages of the utility model are as follows: the front and rear cover plates of the volute are connected to the left and right wall plates of the fan frame by correspondingly adopting the first connecting plate and the second connecting plate with a vertical angle configuration, which can effectively restrain the movement of the entire fan system under actual working conditions and make the connection more secure. On this basis, the second plate of the first connecting plate and the second connecting plate adopts an "irregular shape" design composed of a first side edge, a second side edge and a third side edge, which can better match the direction of the volute profile line and increase the contact connection area with the front and rear covers of the volute. In particular, the first side adopts a gradually upward inclined bevel design and the straight line segment of the third side adopts a bevel design inclined relative to the vertical direction, which can effectively improve the structural strength of the connecting plate, is not easy to break, and can effectively balance the load distribution. When connected with the front and rear cover plates of the volute, the structure can be eliminated as much as possible and balanced without force, making the connection between the connecting plate and the volute more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural schematic diagram of the fan system installation structure of an embodiment of the utility model;

[0026] Figure 2 A bottom view of the fan system installation structure of an embodiment of the utility model;

[0027] Figure 3 The fan system installation structure of the utility model embodiment is along Figure 2 Sectional view cut along the AA direction;

[0028] Figure 4 This is a schematic diagram of the three-dimensional structure of the fan system installation structure of the embodiment of the utility model after the fan frame is omitted;

[0029] Figure 5 This is a schematic diagram of the three-dimensional structure of the fan system installation structure of the embodiment of the utility model after the fan frame is omitted from another angle;

[0030] Figure 6 This is a schematic diagram of the three-dimensional structure of the first connecting plate of an embodiment of the utility model;

[0031] Figure 7 This is a front view of the first connecting plate of an embodiment of the utility model. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0033] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations 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.

[0034] Figure 1-Figure 7The fan system installation structure of the range hood of the utility model and a preferred embodiment of the range hood are shown. The range hood includes a casing and a fan system arranged in the casing. The fan system is generally a centrifugal fan. The casing generally includes a fan frame 1 and a fume hood (not shown) arranged at the bottom of the fan frame 1. The inner cavity of the fan frame 1 is connected to the inner cavity of the fume hood. An air suction port is provided on the front side wall of the fume hood, and external smoke can enter the fume hood through the air suction port. The centrifugal fan is arranged in the fan frame 1. When the centrifugal fan is in operation, negative pressure is generated, and external oil smoke can be sucked into the fume hood through the air suction port.

[0035] The fan frame 1 defines an installation chamber with an open front, and the centrifugal fan is arranged in the installation chamber. The fan frame 1 specifically includes two wall panels 10 arranged at intervals on the left and right sides and extending vertically, and a rear side panel 10c connected between the rear sides of the two wall panels 10. The centrifugal fan is connected to the left and right wall panels 10 respectively. The left and right wall panels 10 of the fan frame 1 are provided with a third pressure profile 11 protruding toward the inside of the fan frame 1, and the third pressure profile 11 is provided with a second connection hole 110.

[0036] The centrifugal fan includes a volute 2, an impeller and a motor. The impeller is arranged in the volute 2 and driven to rotate by the motor. The volute 2 includes a front cover plate 21, a rear cover plate 22 arranged in a front-to-back manner, and an annular wall 23 connected between the front cover plate 21 and the rear cover plate 22. The outer peripheral edge of the front cover plate 21, the outer peripheral edge of the rear cover plate 22 and the two side edges of the annular wall 23 are connected together by conventional inserts and welding points. In this embodiment, the air outlet of the volute 2 faces upward and is connected to the air outlet plate 12 at the top of the fan frame 1. The front cover plate 21 and the rear cover plate 22 of the volute 2 are both extended vertically and are substantially perpendicular to the left and right wall plates 10 of the fan frame 1.

[0037] The connecting plate assembly includes two first connecting plates 30a and two second connecting plates 30b. The left and right wall panels 10 of the wind rack 1 are connected to the front cover plate 21 respectively through the two first connecting plates 30a, and the left and right wall panels 10 of the wind rack 1 are connected to the rear cover plate 22 respectively through the two second connecting plates 30b, wherein the above-mentioned two first connecting plates 30a are mirror-symmetrical structures, and the two second connecting plates 30b are mirror-symmetrical structures. The first connecting plate 30a and the second connecting plate 30b each include a first plate 31 and a second plate 32 that are vertically connected. The first plate 31 of the first connecting plate 30a on the left side is fitted and connected to the left side wall panel 10 of the wind rack 1, and the second plate 32 is fitted and connected to the left edge area of ​​the front cover plate 21, and the first plate 31 of the first connecting plate 30a on the right side is fitted and connected to the right side wall panel 10 of the wind rack 1, and the second plate 32 is fitted and connected to the right edge area of ​​the front cover plate 21. The first plate 31 of the second connecting plate 30b on the left side is connected to the left side wall plate 10 of the fan rack 1, and the second plate 32 is connected to the left edge area of ​​the rear cover plate 22. The first plate 31 of the second connecting plate 30b on the right side is connected to the right side wall plate 10 of the fan rack 1, and the second plate 32 is connected to the right edge area of ​​the rear cover plate 22. The two first connecting plates 30a and the two second connecting plates 30b are arranged on the same horizontal plane and are symmetrically arranged in the front-to-back direction.

[0038] See also Figure 3 Generally, in order to avoid the existence of the connecting plate assembly connecting the volute 2 and the fan and occupying the space of the volute 2, the connecting plate assembly should be located away from the leftmost or rightmost edge of the volute 2, so as to ensure that the volute 2 can be made as large as possible. In this embodiment, the horizontal plane passing through the rotation axis of the impeller is recorded as the reference plane 20M, and the position where the volute 2 is connected to the first connecting plate 30a and the second connecting plate 30b is located below the reference plane 20M.

[0039] The first plate 31 of the first connecting plate 30a and the second connecting plate 30b is rectangular in shape as a whole, and the range of the length thereof is: 38mm≤L≤42mm, and the range of the height thereof is: 62mm≤H≤65mm. The first plate 31 has a second profile 310 partially protruding toward one side of the wall plate 10 of the wind turbine frame 1 and being able to fit with the third profile 11 on the wall plate 10. The protruding height of the second profile 310 ranges from 2mm to 5mm, preferably 3.6mm. The second profile 310 is provided with two first connecting holes 311, which are opposite to the two second connecting holes 110 on the third profile 11 of the wall plate 10, and can be connected and fixed by connecting members such as pins.

[0040] See also Figure 6 and Figure 7, the second plate 32 of the first connecting plate 30a and the second plate 32 of the second connecting plate 30b are the same. Taking the first connecting plate 30a as an example, the second plate 32 thereof includes a first side edge 321, a second side edge 322 located below the first side edge 321, and a third side edge connecting the end of the first side edge 321 and the end of the second side edge 322. The length of the second side edge 322 is greater than the length of the first side edge 321, and the second side edge 322 gradually tilts upward in a direction away from the first plate 31. The third side edge includes a straight line segment 3231 extending upward from the end of the second side edge 322 and an arc segment 3232 connecting the upper end of the straight line segment 3231 and the end of the first side edge 321. The straight line segment 3231 tilts from bottom to top toward a side away from the first plate 31. In order to further improve the balanced load distribution and enhance the reliability of the connection between the volute 2 and the connecting plate, the angle formed by the second side 322 and the horizontal direction is denoted as α, wherein the value range of α is: 2°≤α≤20°; the angle formed by the straight line segment 3231 of the third side and the vertical direction is denoted as β, wherein the value range of β is: the angle formed by the intersection of the straight line segment 3231 of the third side and the second side 322 is denoted as β, wherein the value range of β is: 100°≤β≤130°. The length of the first side 321 is denoted as L1, and the value range of L1 is: 22mm≤L1≤25mm; the length of the second side 322 is denoted as L2, and the value range of L2 is: 53mm≤L2≤55mm; the length of the straight line segment 3231 of the third side is denoted as L3, and the value range of L3 is: 9mm≤L3≤10mm. Since the second plate 32 adopts an "irregular shape" design consisting of a first side edge 321, a second side edge 322 and a third side edge, it can better match the line direction of the volute 2 and increase the contact connection area with the front and rear covers of the volute 2. In particular, the first side edge 321 adopts a bevel design that gradually tilts upward and the straight line segment 3231 of the third side adopts a bevel design that tilts relative to the vertical direction, which can effectively improve the structural strength of the connecting plate, making it less likely to break and effectively balance the load distribution. When connected to the front and rear cover plates 22 of the volute 2, the structure can eliminate and balance the useless force as much as possible, making the connection between the connecting plate and the volute 2 more secure.

[0041] Combination Figure 5 and Figure 6 In order to occupy as little area of ​​the front and rear covers of the volute 2 and the fan frame 1 as possible, the second plate 32 is arranged adjacent to the edge of the front cover plate 21 or the edge of the rear cover plate 22, wherein the second plate 32 is also provided with an avoidance hole 324, and the insert at the connection position of the annular wall 23 and the front and rear cover plates 22 is used for avoidance.

[0042] A first press profile 33 recessed toward the area defined between the first plate 31 and the second plate 32 of the first connecting plate 30a (the same applies to the second connecting plate 30b) is provided at the position where the first plate 31 and the second plate 32 are connected as a reinforcement portion, and at least two second press profiles 310 are provided in the height direction, thereby improving the overall strength of the first connecting plate 30a and the second connecting plate 30b and avoiding deformation problems.

Claims

1. The fan system installation structure of the range hood includes: The fan frame (1) comprises two wall panels (10) which are arranged at a distance from each other on the left and right sides and extend vertically; A fan system comprises a volute (2), wherein the volute (2) comprises a front cover plate (21), a rear cover plate (22) arranged in a front-rear manner, and an annular wall (23) connected between the front cover plate (21) and the rear cover plate (22); A connecting plate assembly connected between the fan frame (1) and the fan system; The invention is characterized in that: the connecting plate assembly comprises two first connecting plates (30a) respectively connected between the two wall plates (10) and the front cover plate (21) and two second connecting plates (30b) respectively connected between the two wall plates (10) and the rear cover plate (22), the first connecting plate (30a) and the second connecting plate (30b) both comprising a first plate (31) and a second plate (32) vertically connected, the first plate (31) being connected to the wall plate (10), the second plate (32) being connected to the front cover plate (21) or the rear cover plate (22), the second plate (32) comprising a first side edge (321), a first side edge (322) and a second side edge (323) located at the first side edge; The second side (322) below the first plate (321) and the third side connecting the end of the first side (321) and the end of the second side (322), the length of the second side (322) is greater than the length of the first side (321), and the second side (322) gradually tilts upward in a direction away from the first plate (31), the third side includes a straight line segment (3231) extending upward from the end of the second side (322) and an arc segment (3232) connected to the upper end of the straight line segment (3231) and the end of the first side (321), and the straight line segment (3231) tilts from bottom to top toward a side away from the first plate (31).

2. The fan system installation structure of the range hood according to claim 1, characterized in that: The angle formed by the second side (322) and the horizontal direction is denoted as α, wherein the value range of α is: 2°≤α≤20°; The angle formed by the intersection of the straight line segment (3231) of the third side and the second side (322) is recorded as β, wherein the value range of β is: 100°≤β≤130°.

3. The fan system installation structure of the range hood according to claim 1, characterized in that: The length of the first side (321) is recorded as L1, and the value range of L1 is: 22mm≤L1≤25mm; The length of the second side (322) is recorded as L2, and the value range of L2 is: 53mm≤L2≤55mm; The length of the straight line segment (3231) of the third side is recorded as L3, and the value range of L3 is: 9mm≤L3≤10mm.

4. The fan system installation structure of the range hood according to claim 1, characterized in that: The second plate (32) is arranged adjacent to the edge of the front cover plate (21) or the edge of the rear cover plate (22), and a avoiding hole (324) is also provided on the second plate (32).

5. The fan system installation structure of the range hood according to claim 1, characterized in that: The first plate (31) is rectangular in shape as a whole, and its length ranges from 38 mm ≤ L ≤ 42 mm, and its height ranges from 62 mm ≤ H ≤ 65 mm.

6. The fan system installation structure of a range hood according to any one of claims 1 to 5, characterized in that: A first pressed part (33) recessed toward an area defined between the first plate (31) and the second plate (32) is provided at a position where the first plate (31) and the second plate (32) are connected, as a reinforcing part.

7. The fan system installation structure of a range hood according to any one of claims 1 to 5, characterized in that: The first plate (31) has a second profile (310) partially protruding toward one side of the wall plate (10) of the fan frame (1) and capable of fitting with the wall plate (10), and the second profile (310) is provided with a first connection hole (311).

8. The fan system installation structure of the range hood according to claim 7, characterized in that: The wall plate (10) of the fan frame (1) has a third profile (11) protruding toward the inside of the fan frame (1) in an area corresponding to the second profile (310), and the third profile (11) is provided with a second connection hole (110) adapted to the first connection hole (311).

9. The fan system installation structure of the range hood according to claim 1, characterized in that: An impeller is arranged in the volute (2), a horizontal plane passing through the rotation axis of the impeller is recorded as a reference plane (20), and the position where the volute (2) is connected to the first connecting plate (30a) and the second connecting plate (30b) is located below the reference plane (20).

10. A range hood, comprising a fan frame (1) and a fan system arranged in the fan frame (1), characterized in that: The fan frame (1) and the fan system are assembled together using the fan system mounting structure of the range hood according to any one of claims 1 to 9.

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