Range hood

Abstract

The utility model provides a range hood which comprises a fan, an exhaust fume collecting hood with a bottom inlet and a fan frame, the fan is fixed on the fan frame and communicated with the bottom inlet, the forward side of the fan frame comprises a front cover plate, a ventilation opening is arranged on the front cover plate, an air inlet of the fan is positioned on the forward side, and the air inlet of the fan is communicated with the ventilation opening. The inner side of the front cover plate is connected with an adsorption module used for adsorbing volatile organic compounds, an adsorption inlet of the adsorption module is exposed out of the ventilation opening, the height of the adsorption module is larger than that of the center line of the air inlet, and a closed inner space is formed in the fan frame to communicate with the bottom inlet and an adsorption outlet of the adsorption module. According to the utility model, on one hand, pollutants are adsorbed, so that air flow purification is realized, treatment of pollutants such as VOCs in a kitchen is realized, and the problems of peculiar smell in the kitchen and the like are solved; and on the other hand, the negative pressure of a local area is improved, the problem that the flow speed of the whole area of the air inlet of the fan is uneven due to size reduction of the fan frame is solved, air volume is increased, and rotating speed and noise are reduced.

Description

Technical Field

[0001] This utility model relates to a range hood. Background Technology

[0002] Range hoods are widely used in kitchens. A typical range hood usually consists of a fume hood and a fan. The fan, located on a frame, draws in cooking fumes, which are collected by the fume hood below, enter the fan through the bottom inlet, and are then exhausted. In actual kitchen environments, cooking pollutants include a large amount of gaseous organic pollutants (volatile organic compounds, VOCs). These pollutants diffuse rapidly and accumulate in large quantities in the kitchen. In areas far from the bottom inlet of the range hood, such as spaces above the fume hood, even with increased airflow, most VOCs cannot be drawn in. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect of existing range hoods that cannot fully exhaust volatile organic compounds, and to provide a range hood.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A range hood includes a fan, a smoke collection hood with a bottom inlet, and a fan frame. The fan is fixed to the fan frame and communicates with the bottom inlet. The front side of the fan frame includes a front cover plate with a vent. The air inlet of the fan is located on the front side. An adsorption module for adsorbing volatile organic compounds is connected to the inside of the front cover plate. The adsorption inlet of the adsorption module is exposed through the vent. The height of the adsorption module is higher than the centerline of the air inlet. The interior of the fan frame forms a closed internal space to communicate with the bottom inlet and the adsorption outlet of the adsorption module.

[0006] In this solution, on the one hand, the suction force of the fan draws in the accumulated airflow from the upper part of the kitchen. During this process, the adsorption module adsorbs pollutants, thereby purifying the airflow and treating pollutants such as VOCs in the kitchen, thus improving problems such as kitchen odors. On the other hand, the added ventilation openings draw in air, increasing the negative pressure in local areas and compensating for the uneven airflow velocity in the overall area of ​​the fan inlet due to the reduced fan frame size, thereby increasing air volume and reducing speed and noise.

[0007] Preferably, the fan frame includes a side cover plate on the side, a back cover plate on the back, and a top cover plate on the top. The side cover plate, the front cover plate, the back cover plate, the top cover plate, and the smoke hood together form a closed internal space. This allows for stronger negative pressure on the air intake from both sides within the internal space, enabling the fan to more fully absorb external air intake.

[0008] Preferably, an air outlet hood is connected above the top cover plate, and an air outlet is connected below the top cover plate, wherein the air outlet communicates with the air outlet hood. The arrangement of the air outlet hood and the top cover plate achieves relative airtightness above the fan frame, ensuring negative pressure in the internal space.

[0009] Preferably, the vent includes a plurality of vertically or horizontally extending grille openings, with the adsorption inlet exposed through the grille openings. The grille openings maximize the exposure of the adsorption inlet while maintaining the relative strength of the front cover.

[0010] Preferably, at least a portion of the adsorption module is positioned above the upper edge of the air inlet, and the adsorption module is horizontally spaced from the fan. This allows the air outlet of the adsorption module to be relatively further away from the air inlet entering from the bottom. This ensures that the airflow from both the upper and lower sides can enter the air inlet relatively evenly without interfering with each other.

[0011] Preferably, an air intake channel is formed between the air inlet and the front cover, and the air intake channel is connected to the air inlet, the adsorption outlet, and the bottom inlet respectively. The air intake channel can restrict airflow from both directions to enter the air inlet.

[0012] Preferably, the vertical projection of the adsorption module falls within the area of ​​the bottom inlet. This ensures that airflow from both the top and bottom flows directly into the air inlet in a vertical direction, reducing wind resistance and increasing the air intake efficiency.

[0013] Preferably, the fan has single-sided or double-sided air intake, and the air intake channel extends to one side or both sides of the fan. When double-sided air intake is implemented, the air intake channels extending on both sides ensure that the air inlets on both sides can function to intake air.

[0014] Preferably, the range hood includes an outer cover that shrouds the front cover and covers the vent. The outer cover and the front cover are spaced apart to form a gap, and the upper and / or lower part of the gap communicates with the outside. The outer cover prevents the vent from being directly exposed, which is aesthetically pleasing and ensures sufficient space for air to enter from above and below, preventing the vent from being blocked and thus malfunctioning.

[0015] Preferably, a pad is also connected to the front cover plate, the pad being located between the front cover plate and the outer shield, and the extension of the pad does not divide the interval space into multiple independent areas. The pad can support the outer shield, ensuring that the interval space is not obstructed and guaranteeing unobstructed airflow.

[0016] The positive and progressive effects of this invention are as follows: On the one hand, it adsorbs pollutants, thereby purifying the airflow and treating pollutants such as VOCs in the kitchen, thus improving kitchen odors. On the other hand, it increases the negative pressure in local areas, compensating for the uneven airflow velocity in the overall area of ​​the fan inlet due to the reduced size of the fan frame, thereby increasing air volume and reducing speed and noise. Attached Figure Description

[0017] Figure 1 This is a perspective view of a range hood according to a preferred embodiment of the present invention.

[0018] Figure 2 This is a front view of a range hood according to a preferred embodiment of the present invention.

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the diagram.

[0020] Figure 4 This is a cross-sectional view of a range hood according to a preferred embodiment of the present invention.

[0021] Figure 5 This is a schematic diagram of the internal structure of a range hood according to a preferred embodiment of the present invention.

[0022] Figure 6 This is a cross-sectional view of the adsorption module of a preferred embodiment of the present invention.

[0023] Figure 7 This is a perspective view of a range hood according to another embodiment of the present invention.

[0024] Figure 8 This is a cross-sectional view of a range hood according to another embodiment of the present invention.

[0025] Figure 9 This is a schematic diagram of the air intake of another embodiment of the present invention.

[0026] Explanation of reference numerals in the attached figures

[0027] Wind turbine frame 100

[0028] Interior space 101

[0029] Air intake duct 102

[0030] Front cover 110

[0031] Ventilation 111

[0032] Grille hole 112

[0033] Side cover 120

[0034] Back cover 130

[0035] Top cover plate 140

[0036] 200 smoke hood

[0037] Bottom import 210

[0038] Fan 300

[0039] Air inlet 310

[0040] 320 air outlet

[0041] Adsorption module 400

[0042] Adsorption import 410

[0043] Adsorption outlet 420

[0044] 500 outer shield

[0045] 600 pads

[0046] 700 air hood Detailed Implementation

[0047] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0048] like Figures 1-9 As shown, this embodiment discloses a range hood. Figures 1-5 As shown, the range hood of this embodiment includes a fan 300, a smoke collection hood 200 with a bottom inlet 210, and a fan frame 100. The fan 300 is fixed to the fan frame 100 and communicates with the bottom inlet 210. The front side of the fan frame 100 includes a front cover plate 110, and a vent 111 is provided on the front cover plate 110. The air inlet 310 of the fan 300 is located on the front side. An adsorption module 400 for adsorbing volatile organic compounds is connected to the inner side of the front cover plate 110. The adsorption inlet 410 of the adsorption module 400 is exposed in the vent 111. The height of the adsorption module 400 is higher than the height of the center line of the air inlet 310. The interior of the fan frame 100 forms a closed internal space 101 to communicate with the bottom inlet 210 and the adsorption outlet 420 of the adsorption module 400 respectively.

[0049] The smoke collection hood 200 in this embodiment can be a known smoke collection hood structure for various range hoods, and it has a bottom inlet 210 connected to the fan 300. Components such as an oil filter can be installed on the bottom inlet 210. The polluted airflow from the stove passes through the oil filter for mechanical separation, filtering out large particles of grease. The adsorption module 400 in this embodiment can be a known adsorption module for adsorbing volatile organic compounds. For example, in this embodiment, it can be an adsorption module for VOCs pollutants; in other embodiments, it can also be an adsorption module for adsorbing other pollutants. That is, the adsorption module 400 not only adsorbs volatile organic compounds but can also adsorb one or more other pollutants.

[0050] Among the pollutants from kitchen cooking, there are a large number of volatile organic compounds (VOCs). These diffuse rapidly and accumulate in large quantities in the upper space of the kitchen, far from the air inlet 310. Even with increased airflow from the range hood, it's impossible to draw VOCs into the inlet. Current methods for VOC removal primarily involve adding VOC adsorption material to the outlet of the fan 300. However, this method only handles a portion of the VOCs that are drawn into the range hood along with cooking fumes; most VOCs remain accumulated in the upper kitchen space. In this example, the adsorption module 400's main function is to absorb the VOCs that the bottom inlet 210 cannot draw in. Specifically, VOCs that have escaped and accumulated in the upper kitchen are drawn in through the vent 111, through the adsorption module 400, and into the fan 300 by the suction of the fan 300, thus purifying the VOCs. The design with two air inlets, one above and one below, increases the air intake area and improves the collection efficiency of pollutants from different areas and with different compositions.

[0051] Furthermore, to achieve the desired replacement and improved integration, the duct size of the range hood after entering the fan frame 100 from the bottom inlet 210 is reduced, weakening the buffering capacity of the incoming airflow and leading to increased internal vortex flow separation, while simultaneously decreasing aerodynamic performance (airflow and air pressure). To avoid these problems, a common method is to increase the rotational speed of the fan 300 to improve airflow performance, but this introduces increased noise. In this embodiment, the vent 111 located in the upper region of the opposing fan frame 100 can increase the negative pressure in a localized area, compensating for the reduced size of the fan frame 100 and resolving the issue of uneven airflow velocity across the entire area of ​​the inlet 310 (more airflow near the bottom inlet 210, less airflow further away). Simultaneously, the vent 111 generates a new source of incoming air, thereby increasing airflow and thus reducing rotational speed and noise. From another perspective, while ensuring airflow performance, the size of the range hood can be reduced, resulting in a more compact structure and lower fan power.

[0052] Therefore, this embodiment can, on the one hand, draw in the accumulated airflow from the upper part of the kitchen under the suction of the fan 300. During this process, the adsorption module 400 adsorbs pollutants, thereby purifying the airflow and treating pollutants such as VOCs in the kitchen, thus improving problems such as kitchen odors. On the other hand, the added vent 111 draws in gas, increasing the negative pressure in the local area and compensating for the uneven airflow velocity in the overall area of ​​the fan 300's air inlet 310 due to the reduced size of the fan frame 100, thereby increasing air volume and reducing rotational speed and noise.

[0053] like Figures 1-5 As shown, in a preferred embodiment, the fan frame 100 includes a side cover plate 120 located on the side, a back cover plate 130 located at the back, and a top cover plate 140 located at the top. The side cover plate 120, front cover plate 110, back cover plate 130, top cover plate 140, and smoke hood 200 surround to form a closed internal space 101. This allows for stronger negative pressure on the air intake from both sides within the internal space 101, enabling the fan 300 to more fully absorb external air intake.

[0054] like Figures 1-5 As shown, in a preferred embodiment, an air outlet hood 700 is connected above the top cover plate 140, and the air outlet 320 of the fan 300 is connected below the top cover plate 140. The air outlet 320 of the fan 300 communicates with the air outlet hood 700. The arrangement of the air outlet hood 700 and the top cover plate 140 achieves relative airtightness above the fan frame 100, ensuring negative pressure in the internal space 101.

[0055] like Figures 1-5 As shown, in a preferred embodiment, the vent 111 includes a plurality of vertically or horizontally extending grille holes 112, through which the adsorption inlet 410 is exposed. The grille holes 112 can maximize the exposure of the adsorption inlet 410 while ensuring the relative strength of the front cover 110.

[0056] like Figure 3 and Figure 6 As shown, in a preferred embodiment, at least a portion of the height of the adsorption module 400 is located above the upper edge of the air inlet 310, and the adsorption module 400 is spaced apart from the fan 300 in the horizontal direction. This allows the air outlet of the adsorption module 400 to be relatively further away from the air inlet entering from the bottom inlet 210 below. This ensures that the airflow from both the upper and lower sides can enter relatively evenly on the upper and lower sides of the air inlet 310 without interfering with each other.

[0057] like Figures 1-5As shown, in a preferred embodiment, an air inlet channel 102 is formed between the air inlet 310 and the front cover plate 110, and the air inlet channel 102 is connected to the air inlet 310, the adsorption outlet 420 and the bottom inlet 210 respectively. The air inlet channel 102 can restrict the air intake from both directions to enter the air inlet 310.

[0058] like Figures 1-5 As shown, in a preferred embodiment, the vertical projection of the adsorption module 400 falls within the area of ​​the bottom inlet 210. This ensures that airflow from both the top and bottom flows directly into the air inlet 310 in a vertical direction, reducing wind resistance and increasing the air intake efficiency of the air inlet 310.

[0059] like Figures 1-5 As shown, in a preferred embodiment, the fan 300 has single-sided or double-sided air intake, and the air intake channel 102 extends to one side or both sides of the fan 300. When double-sided air intake is achieved, the air intake channels 102 extending on both sides can ensure that the air inlets 310 on both sides can function to intake air.

[0060] like Figure 6 and Figure 7 As shown, in a preferred embodiment, the range hood includes an outer cover 500, which covers the front cover 110 and the vent 111. The outer cover 500 and the front cover 110 are spaced apart to form a gap, and the upper and / or lower part of the gap is open to the outside. The outer cover 500 avoids direct exposure of the vent 111, which is aesthetically pleasing and ensures sufficient space for air intake from above and below, preventing the vent 111 from being blocked and malfunctioning.

[0061] like Figures 7-9 As shown, in a preferred embodiment, a pad 600 is also connected to the front cover 110. The pad 600 is located between the front cover 110 and the outer shield 500, and the extension of the pad 600 does not divide the space into multiple independent areas. The pad 600 can support the outer shield 500, ensuring that the space is not blocked and that air intake is unobstructed.

[0062] This invention, on the one hand, adsorbs pollutants, thereby purifying the airflow and treating VOCs and other pollutants in the kitchen, thus improving kitchen odors. On the other hand, it increases the negative pressure in local areas, compensating for the uneven airflow velocity across the entire area of ​​the air inlet 310 of the fan 300 due to the reduced size of the fan frame 100, thereby increasing airflow and reducing rotational speed and noise.

[0063] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A range hood, comprising a fan, a smoke collection hood with a bottom inlet, and a fan frame, wherein the fan is fixed to the fan frame and communicates with the bottom inlet, characterized in that, The front side of the fan frame includes a front cover plate with a vent. The air inlet of the fan is located on the front side. An adsorption module for adsorbing volatile organic compounds is connected to the inside of the front cover plate. The adsorption inlet of the adsorption module is exposed through the vent. The height of the adsorption module is higher than the centerline of the air inlet. The inside of the fan frame forms a closed internal space to connect the bottom inlet and the adsorption outlet of the adsorption module.

2. The hood as claimed in claim 1, wherein, The fan frame includes a side cover plate located on the side, a back cover plate located at the back, and a top cover plate located at the top. The side cover plate, the front cover plate, the back cover plate, the top cover plate, and the smoke collection hood together form a closed internal space.

3. The hood as claimed in claim 2, wherein, An air outlet hood is connected to the top of the top cover plate, and the air outlet of the fan is connected to the bottom of the top cover plate, wherein the air outlet is connected to the air outlet hood.

4. The hood as claimed in claim 1, wherein, The vent includes several vertically or horizontally extending grille holes, and the adsorption inlet is exposed through the grille holes.

5. The hood as claimed in claim 1, wherein, At least a portion of the adsorption module is located above the upper edge of the air inlet, and the adsorption module is spaced apart from the fan in the horizontal direction.

6. The hood according to claim 1, wherein An air intake channel is formed between the air inlet and the front cover plate, and the air intake channel is connected to the air inlet, the adsorption outlet and the bottom inlet respectively.

7. The hood according to claim 6, characterized in that The vertical projection of the adsorption module falls within the area of ​​the bottom inlet.

8. The hood according to claim 6, wherein The fan has a single-sided or double-sided air intake, and the air intake channel extends to one side or both sides of the fan.

9. The hood according to any of the claims from 1 to 8, characterized in that, The range hood includes an outer cover, which is installed on the front cover and covers the vent. The outer cover and the front cover are spaced apart to form a gap space, and the upper and / or lower part of the gap space is connected to the outside.

10. The hood according to claim 9, characterized in that A pad is also connected to the front cover plate. The pad is located between the front cover plate and the outer cover, and the extension of the pad does not divide the space into multiple independent areas.

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