Range hood

Abstract

The utility model discloses a range hood which comprises an upper box body and a fan system, and the fan system comprises a fan, an upper box body and a lower box body, the mounting bracket is used for mounting the fan in the upper box body; the installation support comprises a first arm and second arms which are integrally formed, the first arm extends in the width direction of the volute and is fixedly attached to the volute, the two second arms extend in the direction away from the volute from the two ends of the extending direction of the first arm respectively, and the ends, away from the first arm, of the second arms are connected with the upper box body.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil fume purification device, especially an oil fume extractor. BACKGROUND

[0002] The oil fume extractor has become one of the kitchen household electrical appliances in modern families. At present, the oil fume extractor has various forms, including side suction type, top suction type and the like.

[0003] For the top suction type or the side suction type oil fume extractor with the fan arranged on top, the fan is arranged above the air inlet component (smoke inlet), and the oil fume rises from below to enter the fan. In order to install the fan, the volute support is usually arranged on both sides in the width direction of the volute to be fixed with the fan frame. For example, the volute for the oil fume extractor disclosed in the Chinese patent with the application number 201710305856.3 is formed by the front volute plate structure and the rear volute plate structure. The basic frame structure of the volute for the oil fume extractor is formed by the front volute plate structure and the rear volute plate structure, and the volute support is installed at the position with the largest spiral degree of the volute to play a fixed role.

[0004] In order to adapt to the cabinet or for other reasons, it is necessary to change the volume of the fan frame, especially to make the width of the fan frame smaller, so that the space on both sides of the width of the volute away from the fan frame is smaller, resulting in insufficient space for installing the support.

[0005] Therefore, it is still necessary to be further improved. CONTENT OF THE UTILITY MODEL

[0006] The utility model solves the technical problem of the prior art, provides an oil fume extractor, reduces the space requirement for installing the fan, and improves the installation adaptability.

[0007] The utility model adopts the technical scheme that an oil fume extractor comprises an upper box body and a fan system, and the fan system comprises:

[0008] The fan comprises a volute; and

[0009] The mounting support is used for mounting the fan in the upper box body; and characterized in that:

[0010] The mounting support comprises integrally formed first and second arms, the first arm extends along the width direction of the volute and is fixedly attached to the volute, the second arm has two and extends away from the volute from the ends of the extension direction of the first arm, and the end of the second arm away from the first arm is connected to the upper box body.

[0011] Only one mounting bracket is arranged to complete the installation of the fan, reducing the space requirement for fan installation, without occupying too much space in the upper box, improving the installation adaptability; and the bent shape of the mounting bracket can provide sufficient installation strength and improve the installation stability; in addition, the second arm can play a vortex breaking role on the passing disordered oil fume flow, improve the airflow running efficiency and reduce noise.

[0012] Further, the spacing between the two second arms increases away from the volute, so that the mounting bracket as a whole is in the shape of a transversely placed bridge. The inclined second arm also plays a certain flow guiding role, accelerating the airflow to the center of the inlet of the fan, thereby quickly discharging.

[0013] To further increase the strength, the upper and lower sides of the first arm and the second arm of the mounting bracket are respectively provided with a flange.

[0014] Further, the width of the flange gradually decreases from the end of each second arm away from the first arm to the middle of the first arm, which is conducive to guiding the oil fume to gather from both sides to the middle, and the flow is accelerated.

[0015] Further, the size of the second arm in the up-down direction gradually decreases from the end away from the first arm to the end close to the first arm, thereby further accelerating the airflow to the fan, and the non-equal-width cross-section feature of the second arm also cooperates with the flange, so that the oil liquid can be gathered along the surface of the second arm to the bottom of the flange, and then flow along the flange to the position corresponding to the end of the second arm away from the first arm, i.e. the oil liquid flows along the bottom of the inclined flange to the lowest position of the installation of the upper box, thereby reducing the risk of the whole machine oil circuit.

[0016] Preferably, to facilitate the formation of the non-equal-width cross-section of the second arm, the top of the second arm gradually inclines downward from the direction away from the first arm toward the first arm, and the bottom of the second arm gradually inclines upward from the direction away from the first arm toward the first arm.

[0017] Preferably, the volute comprises a first cover plate, a second cover plate, and a ring wall arranged between the first cover plate and the second cover plate, and the mounting bracket is fixed with one of the cover plates.

[0018] Preferably, the first cover plate and / or the second cover plate is provided with an air inlet, and the mounting bracket is located below the air inlet. The arrangement of the mounting bracket is conducive to accelerating and guiding the oil fume to the center of the air inlet.

[0019] In the oil fume flow path, the second arm is located upstream of the fan; each second arm has a hollow area, and along the extension direction of the second arm, the size of the hollow area in the vertical direction gradually decreases from the position away from the first arm towards the first arm. By setting the hollow area, oil fumes located outside the mounting bracket can pass through the hollow area and enter the space enclosed by the mounting bracket, shortening the path of these oil fumes into the fan and increasing the amount of oil fumes entering the fan; since the first arm corresponds to the center of the air inlet, the change in the diameter of the hollow area creates a Venturi effect, which can gather the oil fumes entering the upper box in advance, so that the oil fume flow velocity increases as the diameter decreases, and the flow is accelerated into the air inlet, thereby improving the oil fume extraction effect; the above effect does not require a separate flow guide component, but is achieved by utilizing the fan's mounting bracket, saving the setting and installation of components and simplifying the structure and flow field.

[0020] Compared with the prior art, the advantages of this utility model are as follows: only one mounting bracket is set to complete the installation of the fan, reducing the fan installation space requirement, without occupying too much space in the upper casing, and improving installation adaptability; and the bent-shaped mounting bracket can provide sufficient installation strength and improve installation stability; in addition, the second arm can break the vortex of the disordered oil fume airflow, improve airflow efficiency and reduce noise. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a range hood according to an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional view (front and rear section) of the range hood according to an embodiment of the present utility model;

[0023] Figure 3 This is a cross-sectional view (left-right section) of the range hood according to an embodiment of the present utility model;

[0024] Figure 4 This is a three-dimensional structural diagram of the fan system of the range hood according to an embodiment of the present utility model;

[0025] Figure 5 This is a front view of the fan system of the range hood according to an embodiment of the present utility model;

[0026] Figure 6 This is a schematic diagram of the mounting bracket for the fan system of the range hood according to an embodiment of the present utility model. Detailed Implementation

[0027] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0029] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0030] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0031] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0032] The specific angles, heights, widths, and other values ​​given in the following detailed embodiments are all measured in accordance with the specific accompanying drawings.

[0033] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0034] See Figures 1-6 A range hood includes an upper housing 1, a smoke collection box 2 connected below the upper housing 1, and a fan system 3. The smoke collection box 2 has a smoke inlet 21 (not limited to the marked position, but can also be a conventional top-suction smoke inlet or side-suction smoke inlet), and the upper housing 1 and the smoke collection box 2 are in fluid communication.

[0035] The fan system 3 includes a fan 31 and a mounting bracket 32, which is used to install the fan 31 inside the upper housing 1. Oil fumes enter the range hood from the smoke inlet 21 of the smoke collection box 2 and flow upwards into the upper housing 1, where they are then discharged outside the range hood by the fan 31.

[0036] The fan 31 may be a centrifugal fan, which includes a volute 311, an impeller 312 disposed within the volute 311, and a motor 313 for driving the impeller 312 to rotate. The output ends of the impeller 312 and the motor 313 are fixed together by a fastening nut 316. An air inlet 314 is formed on the volute 311. There may be one or two air inlets 314. When there are two, they are preferably oriented towards the front and rear sides of the range hood, respectively ("front side" refers to the side of the range hood that is closer to the user when the range hood is installed, and "rear side" refers to the side of the range hood that is farther away from the user and closer to the wall where the range hood is installed when the range hood is installed).

[0037] An annular collector 315 is provided at the air inlet 314, and the collector 315 adopts existing technology. The collector 315 includes a radial guide portion 3151, an axial guide portion 3152 extending axially from the radially inner edge of the radial guide portion 3151 into the volute 311 along the impeller 312 axis, and a mounting portion 3153 extending radially outward from the radially outer edge of the radial guide portion 3151. The radial guide portion 3151 may be convex outward from the volute 311. The mounting portion 3153 is used to fix the cover plate of the volute 311.

[0038] The structure of the fan 31 is the same as that of the prior art, and will not be described in detail here.

[0039] The mounting bracket 32 ​​is connected between the volute 311 and the upper housing 1. In this embodiment, the upper housing 1 includes a rear sidewall 11, which is opposite to the rearward-facing air inlet 314. The mounting bracket 32 ​​is disposed between the rear side of the volute 311 and the rear sidewall 11 of the upper housing 1. The mounting bracket 32 ​​is connected to the volute 311 below the air inlet 314 and close to the bottom of the volute 311. Alternatively, the mounting bracket 32 ​​can also change its position depending on the orientation of the air inlet 314. When there is one air inlet 314, the mounting bracket 32 ​​corresponds to that air inlet 314. When there are two air inlets 314, the mounting bracket 32 ​​corresponds to one of the air inlets 314, especially the main air inlet (the air inlet 314 on the side away from the motor 313). The air inlets 314 mentioned below all refer to the air inlets corresponding to the mounting bracket 32, and not the air inlets located on the side of the volute 31 away from the mounting bracket 32.

[0040] The mounting bracket 32 ​​includes an integrally formed first arm 321 and a second arm 322, the first arm 321 extending along the width direction of the volute 311. Figure 5 (As shown in the left and right directions), the first arm 321 is fixedly attached to the volute 311. There are two second arms 322, which extend from both ends of the extension direction of the first arm 321 away from the volute 311. The distance between the two second arms 322 increases as they move away from the volute 311, so that the mounting bracket 32 ​​is in the shape of a horizontal bridge.

[0041] The mounting bracket 32 ​​is arranged within the channel through which the fumes pass, and its second arm 322 is located upstream of the air inlet 314 along the fume flow path. Thus, the second arm 322 of the mounting bracket 32 ​​can break up the disordered airflow drawn in from the fume inlet 21 of the fume collection box 2, improving airflow efficiency and reducing noise. Simultaneously, the inclined second arm 322 also acts as a guide, accelerating the airflow towards the center of the air inlet 314 of the fan 31, thereby facilitating rapid exhaust. The vertical dimension of the second arm 322 gradually decreases from the end furthest from the first arm 321 towards the end closest to the first arm 321 (non-uniform cross-section), further accelerating the airflow towards the center of the air inlet 314 of the fan 31. In this example, the non-uniform cross-section is formed by the top of the second arm 322 gradually sloping downwards towards the first arm 321 from the direction away from the first arm 321, and the bottom of the second arm 322 gradually sloping upwards towards the first arm 321 from the direction away from the first arm 321.

[0042] The horizontal distance between the ends of the two second arms 322 that are far away from the first arm 321 is H2, and the mounting surface dimension of the upper housing 1 is H0. The mounting surface is the surface that is parallel to the width direction of the volute 311. The relationship between H2 and H0 satisfies H2≤H0 to ensure that the fan 31 with the mounting bracket 32 ​​can be placed into the upper housing 1 from the front side. Usually, a removable front cover plate is provided on the front side of the upper housing 1 for the installation of the fan 31.

[0043] The volute 311 includes a first cover plate 3111, a second cover plate 3112, and an annular wall 3113 disposed between the first cover plate 3111 and the second cover plate 3112. The air inlet 314 is formed on the first cover plate 3111 and / or the second cover plate 3112. The first arm 321 has a certain contact area with the corresponding cover plate of the volute 311 (in this embodiment, the first cover plate 3111, on which the air inlet 314 is formed as the main air inlet). The vertical projection area of ​​the overlapping portion of the first arm 321 and the corresponding cover plate of the volute 311 on a vertical plane perpendicular to the central axis X of the impeller 312 is S1, and the vertical projection area of ​​the first arm 321 on the vertical plane perpendicular to the central axis X of the impeller 312 is S2, and satisfies 2≤S1 / S2≤3.5. In this embodiment, the vertical plane is parallel to the rear side wall 11 of the upper housing 1, and the projection direction is shown in the figure. Figure 2 As shown by arrow F1, the lower limit of this ratio ensures sufficient contact area between the first arm 321 and the volute 311; otherwise, the fan 31 would be unstable when there is only one mounting bracket 32. The upper limit of this ratio ensures that the edges (outer peripheral edges of the covers) of the corresponding cover plates of the first arm 321 and the volute 311 can have more contact, that is, the overlapping part of the volute edge accounts for a larger proportion, thereby increasing the installation strength and overall reliability.

[0044] The bottom edge of the first arm 321 of the mounting bracket 32 ​​is lower than the lowest point of the corresponding cover plate of the volute 311. The horizontal distance between the bottom edge of the first arm 321 and the lowest point of the corresponding cover plate of the volute 311 is H1, and H1≤10mm is satisfied. This further ensures that the edges of the first arm 321 and the corresponding cover plate of the volute 311 can have more contact, thereby ensuring the overall installation strength. The top edge of the first arm 321 and the corresponding cover plate of the volute 311 have two intersection points, M and N, which are located on the same horizontal line. The horizontal distance between the two intersection points MN is d. The maximum width of the volute 311 is D, and 1.4≤D / d≤2.8 is satisfied. This constrains the installation overlap surface of the mounting bracket 32 ​​and the volute 31, thereby ensuring the overall installation stability after the mounting bracket 32 ​​and the volute 31 are fixed. The lower limit of this ratio ensures sufficient contact area between the first arm 321 and the volute 311; otherwise, the fan 31 will be unstable when there is only one mounting bracket 32. The upper limit of this ratio ensures that the edges of the corresponding cover plates of the first arm 321 and the volute 311 can have more contact, that is, the overlapping part of the volute edge accounts for a larger proportion, thereby increasing the installation strength and overall reliability.

[0045] Furthermore, the thickness H0-H1 ≤ 30mm is satisfied to ensure that after the fan 31 is installed, the edge of the mounting bracket 32 ​​can connect with the folded edge 312 of the relatively strong edge of the upper housing 1, thereby improving the overall fixing strength and reliability and avoiding vibration and noise problems caused by a weak mounting surface. In this embodiment, the folded edge 312 is formed on both sides along the width direction of the volute 311, that is, on the left and right sides of the upper housing 1. It can be formed on the left and right side walls of the upper housing 1, or on the rear side wall 11 of the upper housing 1. Each folded edge 312 corresponds to a second arm 322. The second arm 322 and the folded edge 312 can be detachably connected.

[0046] Each second arm 322 has a perforated area 323 located below the air inlet 314. Along the extension direction of the second arm 322, the diameter (vertical dimension) of the perforated area 323 gradually decreases from a position away from the first arm 321 towards the first arm 321. Since the first arm 321 corresponds to the center of the air inlet 314, the change in the diameter of the perforated area 323 can pre-collect the oil fumes entering the upper chamber 1 from the smoke collection box 2, thereby increasing the oil fume flow velocity as the diameter decreases, accelerating the flow into the air inlet 314, and thus improving the smoke extraction effect. Preferably, the two second arms 322 are symmetrical with respect to the first arm 321, and the two perforated areas 323 are also symmetrical with respect to the first arm 321. Oil fumes can pass through the perforated areas 323 at corresponding positions from the outside of the mounting bracket 32 ​​(left and right sides in this embodiment) and enter the area between the two second arms 322.

[0047] Flanges 324 are provided on the upper and lower sides of the first arm 321 and the second arm 322 of the mounting bracket 32. The width of the flanges 324 gradually decreases from the ends of the second arms 322 away from the first arm 321 towards the middle of the first arm 321. The angles between the flanges 324 and the first arm 321, and between the flanges 324 and the second arm 322, are both greater than 90°, thereby effectively improving the overall structural strength of the mounting bracket 32. The non-uniform width cross-section of the second arm 322 allows the oil to converge along the surface of the second arm 322 to the bottom flange 324, and then flow along the flange 324 to the position corresponding to the end of the second arm 322 away from the first arm 321. That is, the oil flows along the bottom inclined flange to the lowest point where the upper housing 1 is installed, thereby reducing the risk of oil circuit problems in the entire machine.

[0048] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. An extractor hood comprising an upper cabinet (1) and a fan system (3), the fan system (3) comprising: a fan (31) comprising a volute (311); and a mounting bracket (32) for mounting the fan (31) in the upper cabinet (1); characterized in that: the mounting bracket (32) comprises a first arm (321) and a second arm (322) integrally formed, the first arm (321) extending along the width direction of the volute (311) and fixedly attached to the volute (311), the second arm (322) having two and extending from the ends of the extension direction of the first arm (321) respectively away from the volute (311), the end of the second arm (322) away from the first arm (321) being connected to the upper cabinet (1). The distance between the two second arms (322) increases away from the volute (311), so that the mounting bracket (32) as a whole is in the shape of a horizontally placed bridge.

2. The hood according to claim 1, characterized in that: The upper and lower sides of the first arm (321) and the second arm (322) of the mounting bracket (32) are respectively provided with a flange (324).

3. The hood according to claim 1, characterized in that: The width of the flange (324) gradually decreases from the end of the second arm (322) away from the first arm (321) to the middle of the first arm (321).

4. The hood according to claim 3, characterized in that: The included angle between the flange (324) and the first arm (321) is greater than 90°, and the included angle between the flange (324) and the second arm (322) is also greater than 90°.

5. The hood according to claim 3, characterized in that: The size of the second arm (322) in the up-down direction gradually decreases from the end away from the first arm (321) to the end close to the first arm (321).

6. The hood according to any one of claims 1-5, characterized in that: The top of the second arm (322) gradually inclines downward from the direction away from the first arm (321) toward the first arm (321), and the bottom of the second arm (322) gradually inclines upward from the direction away from the first arm (321) toward the first arm (321).

7. The hood according to claim 6, characterized in that: The volute (311) comprises a first cover plate (3111), a second cover plate (3112), and a ring wall (3113) arranged between the first cover plate (3111) and the second cover plate (3112), and the mounting bracket (32) is fixed to one of the cover plates.

8. The hood according to any one of claims 1-5, characterized in that: The first cover plate (3111) and / or the second cover plate (3112) is provided with an air inlet (314), and the mounting bracket (32) is located below the air inlet (314).

9. The hood according to claim 8, characterized in that: In the oil fume flow path, the second arm (322) is located upstream of the fan (31); each second arm (322) is formed with a hollowed-out area (323), and along the extension direction of the second arm (322), the size of the hollowed-out area (323) in the up-down direction gradually decreases from the position away from the first arm (321) toward the first arm (321).

10. The hood according to claim 9, characterized in that: ​

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