Range hood

Abstract

The utility model relates to a range hood, which comprises a fan frame, the fan system is arranged in the fan frame; the exhaust fume collecting hood is arranged at the bottom of the fan frame and is communicated with the interior of the fan frame; the range hood further comprises two auxiliary air inlet cavities formed in the left side and the right side of the fan frame respectively, a first ventilation opening and a second ventilation opening which are communicated with the two auxiliary air inlet cavities are formed in the left side wall and the right side wall of the fan frame respectively, and the bottoms of the two auxiliary air inlet cavities are communicated with the top of the exhaust fume collecting hood. The range hood has the advantages that the front-and-back size of the fan frame of the range hood can be reduced as much as possible, the left and right auxiliary air inlet chambers which expand left and right can effectively improve adverse effects caused by reduction of the front-and-back size of the fan frame, and the performance of an original fan system is maintained or improved. According to the structural design of the range hood, the whole range hood can be thinned, and the space layout requirement of a small-sized kitchen is well met.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. Currently available range hoods are generally divided into top-mounted and side-mounted types. Top-mounted range hoods have their air inlet and impeller installed directly above the stove, taking up considerable vertical space and creating a cramped feeling; users also frequently bump their heads during use. Side-mounted range hoods have their air inlet and impeller installed on the side of the stove, closer to the stove, but the inlet and impeller have a larger contact area with cooking fumes, making them prone to accumulating grease and making cleaning more difficult. They may also cause significant heat loss from the stove, increasing gas consumption.

[0003] Considering that kitchen space is often limited, especially for small apartments, thin or ultra-thin range hoods have gradually come into view. For example, Chinese utility model patent application CN201820775851.7 (authorization announcement number: CN208205150U) discloses an ultra-thin bottom-suction range hood, which includes a blower box and a smoke collection hood. The smoke collection hood is located directly below the blower box and is connected to the blower box. The blower box is a three-dimensional columnar cabinet shape, and the smoke collection hood is a rectangular flat plate with a hollow interior, the width of which is greater than its height.

[0004] The aforementioned range hood only features a thinner front-to-back design for the smoke collection hood. However, the front-to-back dimensions of the fan box (i.e., the fan frame) used to house the fan system remain relatively large, protruding significantly forward relative to the smoke collection hood. This has a significant impact on the spatial layout of the kitchen wall cabinets. Furthermore, simply reducing the front-to-back dimensions of the fan box would severely affect the performance of the fan system. Therefore, how to achieve a thinner overall design for the range hood without affecting the performance of the fan system has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a range hood that can achieve a thin overall design without affecting the performance of the fan system, in light of the current state of the technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a range hood, comprising:

[0007] Wind turbine frame;

[0008] The fan system is located within the fan frame;

[0009] A smoke hood is installed at the bottom of the fan frame and communicates with the interior of the fan frame;

[0010] It also includes two auxiliary air inlet chambers respectively located on the left and right sides of the fan frame. The left and right side walls of the fan frame are respectively provided with a first ventilation port and a second ventilation port that communicate with the two auxiliary air inlet chambers. The bottom of the two auxiliary air inlet chambers are connected to the top of the smoke collection hood.

[0011] To further ensure the overall aesthetics of the range hood, the front-to-back dimensions of the two auxiliary air intake chambers are consistent with the front-to-back dimensions of the smoke collection hood. This structural design also ensures that the front-to-back dimensions of the smoke collection hood's inner cavity are nearly identical to those of the auxiliary air intake chambers, guaranteeing stable airflow.

[0012] In order to make the range hood as thin as possible while ensuring its overall suction performance, the left and right dimensions of the smoke collection hood are denoted as L, the front and back dimensions of the auxiliary air intake chamber are denoted as D1, and the front and back dimensions of the fan frame are denoted as D2, wherein 0.11≤D1 / L≤0.19 and 0.33≤D1 / L≤0.43.

[0013] In order to avoid the ventilation effect being affected by the ventilation openings on the side wall of the fan frame, and to ensure the overall strength of the fan frame and avoid deformation, at least two first ventilation openings are arranged sequentially from top to bottom on the left side wall of the fan frame, and at least two second ventilation openings are arranged sequentially from top to bottom on the right side wall of the fan frame.

[0014] As an improvement, the auxiliary air inlet chamber on the left side is also provided with a first guide plate that slopes upward toward the fan frame, and the auxiliary air inlet chamber on the right side is also provided with a second guide plate that slopes upward toward the fan frame.

[0015] The aforementioned baffle plate can form a funnel-shaped air intake channel, which facilitates the flow of flue gas into the fan frame and also promotes pressure equalization in the flow field. This means that the negative pressure is evenly distributed to the smoke inlet of the smoke hood, ensuring the smoke extraction capacity at each position of the smoke inlet.

[0016] To further ensure the airflow guiding effect of the guide plate, the bottom of the first guide plate extends to the top left side of the smoke hood, the top of the first guide plate extends to the upper side of the first vent on the left side wall of the fan frame, the bottom of the second guide plate extends to the top right side of the smoke hood, and the top of the second guide plate extends to the upper side of the second vent on the right side wall of the fan frame.

[0017] To achieve noise reduction, a first noise reduction hole is provided on the first guide plate, and a second noise reduction hole is provided on the second guide plate.

[0018] To further reduce sound absorption and noise, a first sound-absorbing cotton is attached to the side of the first guide plate away from the fan frame, and a second sound-absorbing cotton is attached to the side of the second guide plate away from the fan frame.

[0019] As an improvement, the left side of the fan frame is provided with a first mounting housing, the bottom of the first mounting housing is open and connected to the top left side of the smoke hood, the right side of the first mounting housing is open and connected to the left side wall of the fan frame, and the first guide plate is provided inside the first mounting housing;

[0020] A second mounting housing is provided on the right side of the fan frame. The bottom of the second mounting housing is open and connects to the top right side of the smoke hood. The left side of the second mounting housing is open and connects to the right side wall of the fan frame. The second guide plate is disposed inside the second mounting housing. This structural design eliminates the need to develop a new fan system; only an opening needs to be made in the existing fan frame and a corresponding mounting housing is required, effectively reducing R&D costs and shortening the product development cycle.

[0021] To further simplify the structure of the range hood and reduce costs, the first mounting housing has a U-shaped cross-section. The top of the first guide plate also has a first horizontal plate that extends laterally and can seal the top opening of the first mounting housing. The first mounting housing, the first horizontal plate, and the left side wall of the fan frame together define an auxiliary air inlet chamber located on the left side of the fan frame. The second mounting housing has a U-shaped cross-section. The top of the second guide plate also has a second horizontal plate that extends laterally and can seal the top opening of the second mounting housing. The second mounting housing, the second horizontal plate, and the right side wall of the fan frame together define an auxiliary air inlet chamber located on the right side of the fan frame.

[0022] Compared with existing technologies, the advantages of this utility model are as follows: Auxiliary air intake chambers are respectively set on the left and right sides of the fan frame, and a first ventilation opening and a second ventilation opening are correspondingly opened on the left and right side walls of the fan frame. In this way, air can be introduced between the fan frame and the smoke hood through the two auxiliary air intake chambers that extend to the left and right. Therefore, the front-to-back dimensions of the fan frame of the range hood can be minimized as much as possible, while the left and right extended auxiliary air intake chambers can effectively mitigate the adverse effects caused by the reduction in the front-to-back dimensions of the fan frame, maintaining or improving the performance of the original fan system. This structural design of the range hood allows for a thinner overall design, better meeting the space layout needs of small kitchens. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the range hood according to an embodiment of the present utility model;

[0024] Figure 2This is a top view of the range hood according to an embodiment of the present utility model;

[0025] Figure 3 for Figure 2 Sectional view at point AA;

[0026] Figure 4 This is an exploded view of the range hood according to an embodiment of the present utility model. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0029] Figures 1-4 This illustration shows a preferred embodiment of the range hood of the present invention. The range hood includes a housing and a centrifugal fan disposed within the housing. The housing generally includes a fan frame 10 and a smoke collection hood 20 disposed at the bottom of the fan frame 10, with the inner cavity of the fan frame 10 communicating with the inner cavity of the smoke collection hood 20. An air inlet 21 is provided on the front side wall of the smoke collection hood 20, through which external smoke can enter the smoke collection hood 20. The fan system is generally a centrifugal fan, disposed within the fan frame 10. When the centrifugal fan operates, it generates negative pressure, allowing external fumes to be drawn into the smoke collection hood 20 through the air inlet 21. An oil cup 60 is provided at the bottom of the smoke collection hood 20. The oil cup 60 is an elongated strip extending laterally, used to collect oil stains flowing down from the smoke collection hood 20.

[0030] The range hood in this embodiment also includes two auxiliary air intake chambers 30 respectively located on the left and right sides of the fan frame 10. The left and right side walls of the fan frame 10 are respectively provided with a first ventilation opening 11 and a second ventilation opening 12 that communicate with the two auxiliary air intake chambers 30. The bottoms of the two auxiliary air intake chambers 30 are also respectively connected to the left and right sides of the top of the smoke collection hood 20; that is, the bottoms of the two auxiliary chambers are open, and the left and right sides of the top of the smoke collection hood 20 are also provided with corresponding openings that connect with the bottom openings of the auxiliary chambers.

[0031] The left side wall of the fan frame 10 has at least two first ventilation openings 11 arranged sequentially from top to bottom, such as... Figure 4Three first ventilation openings 11 are shown. Similarly, at least two second ventilation openings 12 are arranged sequentially from top to bottom on the right side wall of the fan frame 10, and three second ventilation openings 12 are also provided. The above-mentioned two or more first ventilation openings 11 and second ventilation openings 12 arranged at intervals ensure the ventilation area of ​​the flow path from the auxiliary air inlet chamber 30 to the fan frame 10, and can avoid the ventilation effect being affected by the arrangement of ventilation openings on the side wall of the fan frame 10. The interval arrangement of the ventilation openings can ensure the overall strength of the fan frame 10 and avoid deformation problems.

[0032] In a preferred embodiment, the front and rear dimensions of the two auxiliary air intake chambers 30 are consistent with the front and rear dimensions of the smoke hood 20. This structural design not only further ensures the overall aesthetics of the range hood, but also makes the front and rear dimensions of the inner cavity of the smoke hood 20 consistent with the front and rear dimensions of the auxiliary air intake chambers 30, thus ensuring the stability of airflow.

[0033] The left-right dimension of the smoke hood 20 is denoted as L, with a value range of 780≤L≤900mm. The front-back dimension of the auxiliary air intake chamber 30 is denoted as D1, with a value range of 100≤D1≤150mm; the front-back dimension of the fan frame 10 is denoted as D2, with a value range of 297≤D2≤337mm. In order to make the range hood as thin as possible while ensuring the overall suction performance, the front-back dimension D1 of the auxiliary air intake chamber 30, the front-back dimension D2 of the fan frame 10, and the left-right dimension L of the smoke hood 20 should be designed in a reasonable proportion. Specifically, 0.11≤D1 / L≤0.19, 0.33≤D1 / L≤0.43.

[0034] See Figure 4A first mounting housing 31 is provided on the left side of the fan frame 10. The first mounting housing 31 has a U-shaped cross-section, meaning that both the bottom and top of the first mounting housing 31 are open, and the side of the first mounting housing 31 facing the left side wall of the fan frame 10 also has vertically extending openings. The front-to-back dimensions of the first mounting housing 31 are basically the same as the front-to-back dimensions of the smoke hood 20. The bottom opening of the first mounting housing 31 connects to the top left side of the smoke hood 20 and communicates with the interior of the smoke hood 20. The right opening of the first mounting housing 31 connects to the left side wall of the fan frame 10 and covers the outside of the first ventilation opening 11 of the fan frame 10, that is, the inner cavity of the first mounting housing 31 is connected to the inner cavity of the fan frame 10 through the first ventilation opening 11. The first guide plate 41 is disposed inside the first mounting housing 31. The first guide plate 41 is inclined from bottom to top towards the fan frame 10 (that is, inclined to the right from bottom to top). In order to further ensure the guiding effect of the first guide plate, the bottom of the first guide plate 41 extends to the top left side of the smoke hood 20, and the top of the first guide plate 41 extends to the upper side of the uppermost first vent 11 on the left side wall of the fan frame 10. The top of the first guide plate 41 also has a first horizontal plate 42 that extends laterally and can seal the top opening of the first mounting housing 31. Thus, the first mounting housing 31, the first horizontal plate 42 and the left side wall of the fan frame 10 together define the auxiliary air inlet chamber 30 located on the left side of the fan frame 10.

[0035] A first mounting housing 31 is provided on the left side of the fan frame 10. The first mounting housing 31 has a U-shaped cross-section, meaning that both the bottom and top of the first mounting housing 31 are open, and the side of the first mounting housing 31 facing the left side wall of the fan frame 10 also has vertically extending openings. The front-to-back dimensions of the first mounting housing 31 are basically the same as the front-to-back dimensions of the smoke hood 20. The bottom opening of the first mounting housing 31 connects to the top left side of the smoke hood 20 and communicates with the interior of the smoke hood 20. The right opening of the first mounting housing 31 connects to the left side wall of the fan frame 10 and covers the first ventilation opening 11 of the fan frame 10, that is, the inner cavity of the first mounting housing 31 is connected to the inner cavity of the fan frame 10 through the first ventilation opening 11. The first guide plate 41 is disposed inside the first mounting housing 31. The first guide plate 41 is inclined from bottom to top towards the fan frame 10 (that is, inclined to the right from bottom to top). In order to further ensure the guiding effect of the first guide plate, the bottom of the first guide plate 41 extends to the top left side of the fume hood 20, and the top of the first guide plate 41 extends to the upper side of the first vent 11 on the left side wall of the fan frame 10. The arrangement of the first guide plate 41 can form a funnel-shaped air inlet channel, which is conducive to the flow of flue gas into the fan frame 10 and also conducive to the pressure equalization of the flow field, that is, to the even distribution of negative pressure to the smoke inlet of the fume hood 20, ensuring the oil fume absorption capacity at each position of the smoke inlet. The top of the first guide plate 41 also has a first horizontal plate 42 that extends laterally and can seal the top opening of the first mounting housing 31. Thus, the first mounting housing 31, the first horizontal plate 42, and the left side wall of the fan frame 10 together define the auxiliary air inlet chamber 30 located on the left side of the fan frame 10. The first horizontal plate 42 can provide support for the front and rear side walls of the first mounting housing 31 in the front-rear direction, ensuring the overall strength of the first mounting housing 31 and preventing deformation.

[0036] A second mounting housing 32 is provided on the right side of the fan frame 10. The cross-section of the second mounting housing 32 is U-shaped, meaning that the bottom and top of the first mounting housing 31 are open, and the side of the second mounting housing 32 facing the right side wall of the fan frame 10 also has vertically extending openings. The front-to-back dimensions of the second mounting housing 32 are basically the same as the front-to-back dimensions of the smoke hood 20. The bottom opening of the second mounting housing 32 connects to the top right side of the smoke hood 20 and communicates with the interior of the smoke hood 20. The left opening of the second mounting housing 32 connects to the right side wall of the fan frame 10 and covers the second ventilation opening 12 of the fan frame 10, that is, the inner cavity of the second mounting housing 32 is connected to the inner cavity of the fan frame 10 through the second ventilation opening 12. The second guide plate 51 is disposed inside the second mounting housing 32. The second guide plate 51 is inclined from bottom to top towards the fan frame 10 (that is, inclined to the left from bottom to top). In order to further ensure the guiding effect of the second guide plate, the bottom of the second guide plate 51 extends to the top right side of the fume hood 20, and the top of the second guide plate 51 extends to the upper side of the uppermost second vent 12 on the right side wall of the fan frame 10. The arrangement of the second guide plate 51 can form a funnel-shaped air inlet channel, which is conducive to the flow of flue gas into the fan frame 10 and also conducive to the uniform distribution of airflow pressure, that is, to the uniform distribution of negative pressure to the smoke inlet of the fume hood 20, ensuring the oil fume absorption capacity at each position of the smoke inlet. The top of the second guide plate 51 also has a second horizontal plate 52 that extends laterally and can seal the top opening of the second mounting housing 32. Thus, the second mounting housing 32, the second horizontal plate 52, and the right side wall of the fan frame 10 together define the auxiliary air inlet chamber 30 located on the right side of the fan frame 10. The second horizontal plate 52 can provide support for the front and rear side walls of the second mounting housing 32 in the front-rear direction, ensuring the overall strength of the second mounting housing 32 and preventing deformation.

[0037] In this embodiment, the range hood has auxiliary air intake chambers 30 on the left and right sides of the fan frame 10, and first ventilation openings 11 and second ventilation openings 12 are correspondingly opened on the left and right side walls of the fan frame 10. This allows air to enter between the fan frame 10 and the smoke hood 20 through the two auxiliary air intake chambers 30, thus minimizing the front-to-back dimensions of the fan frame 10. The extended auxiliary air intake chambers 30 effectively mitigate the adverse effects of the reduced front-to-back dimensions of the fan frame 10, maintaining or improving the performance of the original fan system. This structural design allows for a thinner overall design, better meeting the space requirements of small kitchens. Furthermore, this embodiment eliminates the need for developing a new fan system; only openings in the existing fan frame 10 and fitting corresponding mounting housings are required, effectively reducing R&D costs and shortening the product development cycle.

[0038] See also Figure 4The first guide plate 41 is provided with a first noise reduction hole 410, and the second guide plate 51 is provided with a second noise reduction hole 510. A first sound-absorbing cotton 43 is attached to the side of the first guide plate 41 away from the fan frame 10, and a second sound-absorbing cotton 53 is attached to the side of the second guide plate 51 away from the fan frame 10. By providing noise reduction holes and sound-absorbing cotton on the guide plates, effective sound absorption and noise reduction can be achieved during fan operation, improving the user experience.

Claims

1. A range hood, comprising: a fan frame (10); a fan system arranged in the fan frame (10); a smoke collecting hood (20) arranged at the bottom of the fan frame (10) and communicating with the interior of the fan frame (10); characterized in that: two auxiliary air inlet chambers (30) are further arranged on the left and right sides of the fan frame (10) respectively, first and second air vents (11, 12) are respectively arranged on the left and right side walls of the fan frame (10) and communicating with the two auxiliary air inlet chambers (30), and the bottoms of the two auxiliary air inlet chambers (30) communicate with the top of the smoke collecting hood (20).

2. The hood according to claim 1, characterized in that: The front-to-back dimension of the two auxiliary air inlet chambers (30) is consistent with the front-to-back dimension of the smoke collecting hood (20).

3. The hood according to claim 1, characterized in that: The left-to-right dimension of the smoke collecting hood (20) is denoted as L, the front-to-back dimension of the auxiliary air inlet chamber (30) is denoted as D1, and the front-to-back dimension of the fan frame (10) is denoted as D2, wherein 0.11≤D1 / L≤0.19 and 0.33≤D1 / L≤0.

43.

4. The hood according to claim 1, characterized in that: At least two first air vents (11) are arranged on the left side wall of the fan frame (10) from top to bottom, and at least two second air vents (12) are arranged on the right side wall of the fan frame (10) from top to bottom.

5. The hood according to any one of claims 1-4, characterized in that: A first flow guide plate (41) is further arranged in the left auxiliary air inlet chamber (30) and inclined from bottom to top towards the fan frame (10), and a second flow guide plate (51) is further arranged in the right auxiliary air inlet chamber (30) and inclined from bottom to top towards the fan frame (10).

6. The hood according to claim 5, characterized in that: The bottom of the first flow guide plate (41) extends to the left side of the top of the smoke collecting hood (20), the top of the first flow guide plate (41) extends to the upper side of the uppermost first air vent (11) on the left side wall of the fan frame (10), the bottom of the second flow guide plate (51) extends to the right side of the top of the smoke collecting hood (20), and the top of the second flow guide plate (51) extends to the upper side of the uppermost second air vent (12) on the right side wall of the fan frame (10).

7. The hood according to claim 5, characterized in that: First noise reduction holes (410) are further arranged on the first flow guide plate (41), and second noise reduction holes (510) are further arranged on the second flow guide plate (51).

8. The hood according to claim 7, characterized in that: First sound-absorbing cotton (43) is attached to the side of the first flow guide plate (41) away from the fan frame (10), and second sound-absorbing cotton (53) is attached to the side of the second flow guide plate (51) away from the fan frame (10).

9. The hood according to claim 5, characterized in that: A first mounting shell (31) is arranged on the left side of the fan frame (10), the bottom of the first mounting shell (31) is open and connected to the left side of the top of the smoke collecting hood (20), the right side of the first mounting shell (31) is open and connected to the left side wall of the fan frame (10), and the first flow guide plate (41) is arranged in the first mounting shell (31). The right side of the fan frame (10) is provided with a second mounting shell (32), the bottom of the second mounting shell (32) is open, and the right side of the top of the smoke hood (20) is connected, the left side of the second mounting shell (32) is open, and the right side wall of the fan frame (10) is connected, and the second guide plate (51) is arranged in the second mounting shell (32).

10. The hood according to claim 9, characterized in that: The cross section of the first mounting shell (31) is U-shaped, the top of the first guide plate (41) further has a first transverse plate (42) extending transversely and capable of sealing the top of the first mounting shell (31), the first mounting shell (31), the first transverse plate (42) and the left side wall of the fan frame (10) jointly define an auxiliary air inlet chamber (30) located on the left side of the fan frame (10), the cross section of the second mounting shell (32) is U-shaped, the top of the second guide plate (51) further has a second transverse plate (52) extending transversely and capable of sealing the top of the second mounting shell (32), and the second mounting shell (32), the second transverse plate (52) and the right side wall of the fan frame (10) jointly define an auxiliary air inlet chamber (30) located on the right side of the fan frame (10).

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