Fan and range hood

Abstract

The present application relates to the technical field of fans, and discloses a fan. The fan includes an impeller and a filter screen arranged at the air inlet end face of the impeller, wherein the filter screen includes: a main air inlet mesh surface; a side air inlet grid group, including a plurality of grid sheets arranged along the circumferential edge of the main air inlet mesh surface and extending toward the impeller, and a side air inlet channel is formed between adjacent grid sheets. The filter screen of the fan provided in the embodiment of the present disclosure adopts a design combining the main air inlet mesh surface and the side air inlet grid. While ensuring the filtering effect of the main air inlet mesh surface on the oil smoke from the air inlet direction, the side air inlet grid can also be used to increase the negative pressure suction force on the oil smoke in the non-air inlet direction around the fan and realize the adsorption and filtration of this part of the oil smoke, so as to further ensure the exhaust effect and oil smoke filtering effect of the whole range hood. The embodiment of the present disclosure also discloses a range hood.

Description

Technical Field

[0001] The present application relates to the technical field of fans, for example, to a fan and a range hood. Background Art

[0002] Range hoods are currently the most commonly used household smoke exhaust devices, which can discharge the fumes in the kitchen environment into the outdoor environment, thereby reducing the amount of indoor fumes and purifying the kitchen environment. The range hood mainly consists of components such as a smoke collecting chamber, a flue and a fan. The fan is the core of the range hood as the power source for conveying smoke. As the range hood is used for a longer time, more oil will gradually accumulate in the fan, affecting the operating efficiency of the fan. In response to the above situation, some fans in the relevant technology will be equipped with a filter on the air inlet side of the fan impeller so that the filter can absorb most of the oil in the smoke before the smoke enters the fan.

[0003] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in the related art:

[0004] The fan of the range hood is generally installed inside the flue. The negative pressure suction generated by the fan is mainly concentrated on the air inlet side where the air inlet end face is located. Since a small amount of oil smoke will escape into other spaces around the fan that are not in the main air inlet direction, these oil smoke are subject to a small negative pressure force and deviate from the main air inlet direction. Therefore, they are easy to enter the impeller through the gaps of the fan itself or the gaps between the impeller and the filter. Therefore, this part of the smoke cannot be well filtered out. Summary of the invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical components or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] The embodiments of the present disclosure provide a fan and a range hood to solve the technical problem in the related art that the fan has a low oil fume filtering effect in non-air inlet directions.

[0007] In some embodiments, the fan includes an impeller and a filter disposed at the air inlet end surface of the impeller, wherein the filter includes:

[0008] Main air inlet mesh surface;

[0009] The side air inlet grid group includes a plurality of grid sheets arranged along the circumferential edge of the main air inlet mesh surface and extending toward the impeller, and a side air inlet channel is formed between adjacent grid sheets.

[0010] In some further embodiments, the range hood includes a fan as in the above embodiments.

[0011] The fan provided by the embodiment of the present disclosure can achieve the following technical effects:

[0012] The filter of the fan provided in the embodiment of the present disclosure adopts a design that combines a main air inlet mesh surface and a side air inlet grid. While ensuring the filtering effect of the main air inlet mesh surface on the oil smoke from the main air inlet direction, the side air inlet grid can also be used to increase the negative pressure attraction force on the oil smoke in the non-main air inlet direction around the fan and realize the adsorption and filtration of this part of the oil smoke, thereby ensuring the smoke exhaust effect and oil smoke filtration effect of the entire range hood.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings, which do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements, and the drawings do not constitute a scale limitation, and wherein:

[0015] Figure 1 is a structural schematic diagram of a fan provided by an embodiment of the present disclosure;

[0016] Figure 2 is a schematic structural diagram of an impeller provided in an embodiment of the present disclosure;

[0017] Figure 3 is a schematic diagram of the overall structure of the filter provided by an embodiment of the present disclosure;

[0018] Figure 4 It is a side view of the filter provided in the embodiment of the present disclosure.

[0019] Among them, 1. impeller; 11. front cover plate; 12. rear cover plate; 13. blades; 2. filter screen; 21. main air inlet mesh surface; 22. side air inlet grid group; 221. grid plate; 31. plug-in plate; 32. plug-in slot. DETAILED DESCRIPTION

[0020] In order to be able to understand the features and technical contents of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The attached drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0021] Figure 1 is a schematic diagram of the structure of the fan provided by the embodiment of the present disclosure, Figure 2 is a schematic diagram of the structure of the impeller provided in the embodiment of the present disclosure, Figure 3 is a schematic diagram of the overall structure of the filter provided in the embodiment of the present disclosure, Figure 4 It is a side view of the filter provided in the embodiment of the present disclosure.

[0022] like Figure 1 As shown, an embodiment of the present disclosure provides a fan, which is mainly composed of a cover, a motor (both are not shown in the figure), an impeller 1, a filter 2 and other components.

[0023] An optional fan type shown in this embodiment is a centrifugal fan, the casing of which is a volute structure, and the interior of the volute is formed with a space for accommodating an impeller 1, an air duct for smoke circulation, and an air inlet opened on the casing wall corresponding to the position of the impeller 1; a motor is drivingly connected to the impeller 1, and is used to drive the impeller 1 to rotate and generate a negative pressure force at the air inlet end face to attract smoke to enter from the air inlet; a filter 2 is arranged at the air inlet end face of the impeller 1, so that the smoke needs to flow through the filter 2 before flowing into the impeller 1. The filter 2 can filter out most of the oil in the smoke by adsorption and the like, so as to reduce the oil content in the smoke entering the fan, reduce the accumulation of oil in the fan, and effectively improve the cleanliness of the fan.

[0024] exist Figure 2 In an optional embodiment shown, the impeller 1 is mainly composed of a front cover plate 11, a rear cover plate 12 and a plurality of blades 13, wherein the front cover plate 11 and the rear cover plate 12 are two coaxially arranged circular ring plates of the same shape and size, and the plurality of blades 13 are uniformly arranged along the circumferential edges of the front and rear cover plates 12 in sequence, and the longitudinal direction of the blades 13 is parallel to the axial direction.

[0025] The circular openings inside the circular ring plates of the front cover plate 11 and the rear cover plate 12 serve as channels for external smoke to enter the impeller 1. When the fan and the range hood are assembled, in order to ensure that the negative pressure force covers the smoke range as much as possible, the circular opening of one of the cover plates is generally directed toward the smoke collecting chamber of the range hood. In this embodiment, the front cover plate 11 is directed toward the smoke collecting chamber, so the side where the front cover plate 11 is directed is the air inlet side. Here, the end face where the front cover plate 11 is located is set as the air inlet end face of the impeller 1, and the external smoke mainly enters the impeller 1 through the circular opening of the front cover plate 11.

[0026] The two ends of each blade 13 are respectively against the inner walls of the front cover plate 11 and the rear cover plate 12. The blade 13 and the front cover plate 11 and the rear cover plate 12 can be fixed by welding, plugging, etc. The relative position of the blade 13 and the front cover plate 11 and the rear cover plate 12 and the relative position of the blade 13 and the blade 13 bracket will not be misaligned to ensure the stability between the blade 13 and the front cover plate 11 and the rear cover plate 12 during the operation of the impeller 1; the lateral direction of the blade 13 is inclined with the radial direction of the circle in which it is located, so that the impeller 1 can generate a negative pressure force when the motor rotates. Optionally, the blade 13 is in the form of a straight plate, a regular arc plate or an irregular arc plate. The selection of the blade 13 of the impeller 1 can be determined according to the actual smoke exhaust and air supply requirements, and this application does not limit this.

[0027] It should be noted here that the longitudinal direction of the blade 13 in the above text corresponds to the length direction of the blade 13 , and the transverse direction corresponds to the width direction of the blade 13 .

[0028] exist Figure 3 and Figure 4 In an optional embodiment shown, the filter 2 includes a main air inlet mesh surface 21 and a side air inlet grid group 22. The main air inlet mesh surface 21 is mainly used to filter the smoke from the main air inlet direction, that is, the air inlet end face of the impeller 1 facing upward, while the side air inlet grid group 22 is mainly used to filter the smoke from the non-main air inlet direction, mainly the peripheral direction of the air inlet end face.

[0029] Here, the filter 2 is arranged on the air inlet end face of the front cover plate 11 of the impeller 1. By adopting a design combining the main air inlet mesh surface 21 and the side air inlet grid, while ensuring the filtering effect of the main air inlet mesh surface 21 on the oil smoke from the main air inlet direction, the side air inlet grid can also be used to increase the negative pressure attraction force on the oil smoke in the non-main air inlet direction around the fan and realize the adsorption and filtration of this part of the oil smoke, so as to further ensure the exhaust effect and oil smoke filtration effect of the whole range hood.

[0030] In this embodiment, the main air inlet mesh surface 21 includes a ring plate arranged at the outermost edge and a mesh surface arranged in the circular space inside the ring plate; optionally, the size of the outermost ring plate is adapted to the size of the front panel, so that the outer periphery of the main air inlet mesh surface 21 installed on the air inlet end face of the impeller 1 will not protrude from the outer peripheral contour of the impeller 1, which is convenient for installation and positioning; at the same time, the internal space range of the outermost ring plate is adapted to the range of the circular opening of the front panel, so that the air inlet area of ​​the impeller 1 can always be kept consistent, so that the smoke can enter the impeller 1 more smoothly through the main air inlet mesh surface 21 and the circular opening of the front panel in turn, avoiding problems such as uneven air intake airflow caused by inconsistent sizes of the two.

[0031] Optionally, the mesh surface of the main air inlet mesh surface 21 is a structural style in which multiple mesh wires are centered on a circle and radiate circumferentially; of course, the mesh surface can also adopt other structural styles, such as a tic-tac-toe shape, a diamond shape, etc., and the present application is not limited thereto.

[0032] The side air inlet grid group 22 includes a plurality of grid pieces 221 of similar shape and size. The plurality of grid pieces 221 are evenly arranged along the circumferential edge of the main air inlet mesh surface 21 to ensure that the overall center of mass of the filter 2 can be at the center of the circle, thereby avoiding dynamic imbalance caused by uneven weight distribution of the filter 2 and achieving the effect of uniform air intake and uniform filtration of oil smoke.

[0033] In the embodiment, one end of the grille sheet 221 is fixed to the outermost ring plate of the main air inlet mesh surface 21, and the other end is extended toward the impeller 1. When the filter screen 2 and the impeller 1 are assembled, the extended free end of the grille sheet 221 abuts against the front cover plate 11 of the impeller 1, and a side air inlet channel is formed between adjacent grille sheets 221. The direction of the side air inlet channel here can be regarded as toward the outer peripheral direction of the impeller 1. Therefore, when the impeller 1 is running, a part of the negative pressure force generated by the impeller 1 is applied to the side air inlet grid group 22, so that the flue gas on the outside of the side air inlet grid group 22 and in the non-main air inlet direction can enter the inside of the impeller 1 through the side air inlet channel, thereby achieving the effect of gathering and discharging the flue gas in the non-main air inlet direction; at the same time, the grille sheet 221 can also play a role in absorbing and filtering the oil in the flue gas flowing through the side air inlet channel, so as to reduce the amount of oil entering the impeller 1 through the side air inlet channel.

[0034] In some optional embodiments, in order to achieve the effect of attracting surrounding oil smoke and avoid excessive wind pressure loss on the main air inlet side, the length of the grille sheet 221 and the radius of the main air inlet mesh surface 21 satisfy the following relationship:

[0035] 1:15≤L 格栅 : R 主进风 ≤1:3

[0036] Among them, L 格栅 is the length of the grid sheet 221, R 主进风 It is the radius of the main air inlet mesh surface 21.

[0037] Here, the length of the grille sheet 221 is the length of the grille sheet 221 in the axial direction of the impeller 1, which can determine the air intake area of ​​the side air intake channel formed by adjacent grille sheets 221. Therefore, the present application designs the length of the grille sheet 221 and the radius of the main air intake mesh surface 21 using the above-mentioned numerical relationship to improve the circumferential oil fume suction effect while reducing the adverse effect on the oil fume suction effect on the main air intake side.

[0038] Exemplarily, the radius of the main air inlet mesh surface 21 is 15 cm, and the corresponding length of the grille sheet 221 is 5 cm, and the numerical ratio of the two meets the above-mentioned numerical relationship requirement of being equal to 1:3; in another exemplary embodiment, the radius of the main air inlet mesh surface 21 is 20 cm, and the corresponding length of the grille sheet 221 is 5 cm, and the numerical ratio of the two is 1:4, which also meets the above-mentioned numerical relationship requirement of being less than. Here, the size of the main air inlet mesh surface 21 can be determined according to the size design of the impeller 1, and further, the length of the grille sheet 221 can be determined according to the above-mentioned relationship.

[0039] The arrangement density of the grille pieces 221 on the axial edge of the main air inlet mesh surface 21 can affect the oil fume filtering effect of the side air inlet grille group 22. In some optional embodiments, the number of grille pieces 221 of the side air inlet grille group 22 is in the range of: 10≤m 格栅 ≤450, the value range of the edge perimeter of the main air inlet mesh surface 21 is: 120mm≤C 主进风 ≤1200mm; m 格栅 is the number of grille pieces 221 of the side air inlet grille group, C 主进风 It is the edge perimeter of the main air inlet mesh surface 21.

[0040] Here, the number of grille pieces 221 and the edge perimeter of the main air inlet mesh surface 21 can jointly affect the arrangement density of the grille pieces 221, wherein the number of grille pieces 221 is positively correlated with the arrangement density, that is, when the edge perimeter remains unchanged, the more grille pieces 221 there are, the greater the arrangement density, and vice versa; the edge perimeter of the main air inlet mesh surface 21 is negatively correlated with the arrangement density, that is, when the number of grille pieces 221 remains unchanged, the longer the edge perimeter of the main air inlet mesh surface 21, the smaller the arrangement density, and vice versa. The present application can effectively improve the filtering effect of the oil smoke inhaled on the peripheral side by designing the number of grille pieces 221 and the edge perimeter of the main air inlet mesh surface 21 using the above numerical relationship.

[0041] In some optional embodiments, the lateral direction of the grille sheet 221 is parallel to the radial direction of the impeller 1. In other optional embodiments, the grille sheet 221 is arranged to be inclined along the rotation direction of the impeller 1. Here, since the impeller 1 and the filter screen 2 are fixed, the filter screen 2 and the impeller 1 rotate synchronously when the impeller 1 is running, and the direction of the suction airflow generated by the rotation of the impeller 1 is also inclined. Therefore, the grille sheet 221 is arranged in an inclined form corresponding to the rotation direction of the impeller 1, so that the direction of the suction airflow generated by the impeller 1 can be consistent with the direction of the side air intake channel, so that the external smoke can flow in more smoothly, reducing the wind resistance of the side air intake grille group.

[0042] Optionally, the inclination angle of the grid plate 221 has a value range of: 30°≤α<90°, wherein α is the inclination angle of the grid plate 221 , and the inclination angle here refers to the acute angle formed between the transverse direction of the grid plate 221 and the radial direction of the impeller 1 .

[0043] In some optional embodiments, factors affecting the filtering effect of the side air intake grille group 22 on oil smoke also include the radial width of the grille sheet 221 and the spacing between adjacent grille sheets 221. To ensure the filtering effect of the side air intake oil smoke, the radial width of the grille sheet 221 in the present application is in the range of: 0.5mm≤L1≤10mm; the spacing between two adjacent grille sheets 221 is in the range of: 1mm≤L2≤10mm; wherein L1 is the radial width of the grille sheet 221, and L2 is the spacing between two adjacent grille sheets 221.

[0044] In addition, the side air inlet channel can also be used as a channel for discharging oil, achieving the effect of cleanly discharging oil without contaminating the impeller 1.

[0045] In the present embodiment, the main air inlet mesh surface 21 and the side air inlet grid group 22 mainly utilize adsorption to filter the oil in the flue gas. As the amount of flue gas flowing through increases, a large amount of oil stains adhere to both the front and back surfaces of the filter screen 2. After the impeller 1 stops running, the filter screen 2 also stops rotating synchronously. Therefore, the oil stains will gradually slide along the mesh surface to the lower end under the action of their own gravity. The gaps between the adjacent grid sheets 221 at the lower end can now serve as a channel for the oil stains to drip and escape from the filter screen 2. Compared with the fan model in the related art in which the filter screen 2 is attached to the impeller 1, the oil stains sliding off the filter screen 2 in the present application will not flow through the impeller 1, thereby effectively ensuring the cleanliness of the impeller 1.

[0046] In some optional embodiments, the impeller 1 and the filter screen 2 can be fixed by welding, such as welding the free ends of the grid plates 221 of the filter screen 2 to the circular ring plates of the front cover plate 11 of the impeller 1 in sequence; alternatively, the impeller 1 and the filter screen 2 can also be fixed by mortise and tenon or bolt connections.

[0047] In some other optional embodiments, the impeller 1 and the filter 2 are fixed by a plug-in structure. Here, two or more plug-in plates 31 are arranged on the air inlet end face of the impeller 1, and the plug-in plates 31 are evenly distributed at the circumferential edge, and one end of the plug-in plate 31 is fixed to the air inlet end face, and the other end extends toward the air inlet side; a plug-in slot 32 is arranged at a corresponding position of the circumferential edge of the main air inlet surface of the filter 2; when the impeller 1 and the filter 2 are assembled, the plug-in plate 31 is inserted into the plug-in slot 32 at the corresponding position, and after the plug-in plate 31 is plugged into the plug-in slot 32, the free end of the plug-in plate 31 can be bent to achieve clamping and limiting, and at this time, the free end of the grille plate 221 is against the air inlet end face.

[0048] Optionally, the grille pieces 221 of the side air inlet grille group 22 are spaced a certain distance from the outer edge of the outermost ring plate of the main air inlet mesh surface 21, and the plug-in slots 32 are opened within the spacing range of the ring plate, so that the opening position of the plug-in slots 32 will not interfere with the position of the grille pieces 221 that need to be evenly distributed.

[0049] In some optional embodiments, the center of the main air inlet mesh surface 21 is connected to the end of the shaft of the impeller 1, so that the center and periphery of the filter 2 are respectively fixed to the shaft and the impeller 1, which can effectively improve the stability of the filter 2 during synchronous operation.

[0050] The disclosed embodiment also provides a range hood, comprising a range hood body and a fan as shown in any of the above embodiments. The range hood using this fan can not only ensure the filtering effect of oil smoke from the main air inlet direction, but also increase the negative pressure attraction force on the oil smoke in the non-main air inlet direction around the fan and achieve adsorption and filtration of this part of the oil smoke, so as to further ensure the exhaust effect and oil smoke filtration effect of the range hood.

[0051] It should be understood that the present invention is not limited to the processes and structures described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A fan, characterized in that: The invention comprises an impeller and a filter screen arranged at the air inlet end surface of the impeller, wherein the filter screen comprises: Main air inlet mesh surface; A side air inlet grid group, comprising a plurality of grid pieces arranged along the circumferential edge of the main air inlet mesh surface and extending toward the impeller, with a side air inlet channel formed between adjacent grid pieces; one end of the grid piece is fixed to the outermost ring plate of the main air inlet mesh surface, and the other end is extended toward the impeller; Among them, the impeller and the filter are fixed by a plug-in structure, specifically, two or more plug-in plates extending toward the air inlet side are arranged at the circumferential edge of the air inlet end face of the impeller, and plug-in grooves are arranged at corresponding positions of the circumferential edge of the main air inlet mesh surface of the filter; after the plug-in plates are plugged into the plug-in grooves, the free ends are bent and clamped to limit the position.

2. The fan according to claim 1, characterized in that: The length of the grille sheet and the radius of the main air inlet mesh surface satisfy the following relationship: 1:15≤L grille: R main air intake≤1:3, Wherein, Lgrid is the length of the grille sheet, and Rmain air inlet is the radius of the main air inlet mesh surface.

3. The fan according to claim 1, characterized in that: The value range of the number of grille pieces of the side air inlet grille group is: 10≤m grille≤450; The value range of the edge perimeter of the main air inlet mesh surface is: 120mm≤Cmain air inlet≤1200mm; Among them, m grille is the number of grille pieces of the side air inlet grille group, and C main air inlet is the edge circumference of the main air inlet mesh surface.

4. The fan according to claim 1, characterized in that: The grid plates are arranged tilted along the rotation direction of the impeller.

5. The fan according to claim 4, characterized in that: The range of the inclination angle of the grid plate is: 30°≤α<90°, Wherein, α is the inclination angle of the grid plate.

6. The fan according to claim 1, characterized in that: The radial width of the grid sheet has a value range of: 0.5 mm ≤ L1 ≤ 10 mm; The range of the distance between two adjacent grid pieces is: 1mm≤L2≤10mm; Wherein, L1 is the radial width of the grid sheet, and L2 is the distance between two adjacent grid sheets.

7. The fan according to claim 1, characterized in that: The center of the main air inlet mesh surface is connected to the end of the impeller shaft.

8. A range hood, characterized in that: Comprising a fan as claimed in any one of claims 1 to 7.

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