Air inlet structure of range hood

Abstract

The air inlet structure of the range hood is characterized in that the air inlets are formed around the air inlet guide plate, and the projection of the air inlets on the vertical direction falls on the smoke guide plate as a whole. The range hood has the air inlet guide plate installed on the top of the lower air inlet body, and the smoke guide plate is installed below the air inlet guide plate. The air inlets are formed around the air inlet guide plate, so that the oil fume rising from the cooking bench can be prevented from escaping from around the smoke guide plate, the ring suction effect is formed, the oil fume suction effect is improved, the projection of the air inlets on the vertical direction falls on the smoke guide plate as a whole, the air inlets are shielded from the visual range of the user by the smoke guide plate, the appearance is good, and the user experience is improved.

Description

Technical Field

[0001] This utility model relates to range hoods, and more particularly to an air inlet structure for a range hood. Background Technology

[0002] In the kitchen appliance industry, the range hood, as a core oil fume purification device, directly determines the oil fume capture efficiency, aesthetic harmony, and user experience through its air inlet structure, making it one of the key aspects of technological research and development in the industry. Existing downdraft range hoods typically have their air inlets directly located on the bottom or side of the lower intake body, and these inlets are mostly open structures such as grilles or strips, lacking effective concealment designs. Exposed air inlets not only clash with the minimalist and integrated design style of modern kitchens, creating an abrupt and visually cluttered appearance, but also easily accumulate grease. The grease in the grille gaps is difficult to clean, and long-term use can lead to bacterial growth, affecting kitchen hygiene and user health. Furthermore, downdraft range hoods often have single-sided, locally concentrated, or non-circular air inlets, limiting the air intake area to a localized area below the range hood and failing to achieve comprehensive, all-around air intake. During cooking, cooking fumes spread outwards due to heating, but localized air intake structures can only capture fumes directly below. This results in insufficient capture of fumes that have spread to areas with weak air intake, making it easy for fumes to escape. In addition, non-circular air intake can cause turbulent airflow. Excessive local airflow speed can generate noise, while excessively slow local airflow speed can affect smoke extraction efficiency, making it difficult to meet the dual requirements of quiet operation and efficient smoke extraction.

[0003] To overcome the problem of a single air inlet in downdraft range hoods, existing technologies have disclosed top-and-side dual-suction range hoods. For example, Chinese utility model patent No. 201620964850.8 (authorization announcement No. CN 206001578 U) discloses a high-volume range hood, which includes a body and a mask. The mask is located at the bottom of the body, with an upper air inlet at the top and a lower air inlet at the bottom, forming a downdraft channel inside the mask. This allows fumes to be simultaneously drawn in through both the upper and lower air inlets, improving fume extraction. However, the upper air inlet of this range hood is exposed, resulting in poor aesthetics, and since it is only located on the front side of the mask, it cannot achieve a top-level surround suction effect.

[0004] To conceal the air inlet, the common practice is to reduce the air intake area and add a closed cover. However, reducing the air intake area directly leads to a decrease in air intake efficiency and a weakening of smoke extraction capacity. Furthermore, the closed cover requires a motor to open and close, which not only increases equipment costs and failure rates but also causes grease to escape due to delayed opening and closing. It is evident that there is a difficult trade-off between the concealment of the air inlet structure and high air intake efficiency in range hoods. If an aesthetically pleasing design is prioritized by concealing the air inlet, air intake efficiency is easily sacrificed; conversely, if an open air inlet is used to maximize air intake efficiency, the appearance becomes cluttered and difficult to clean. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an air inlet structure for a range hood that can hide the air inlet and have a circumferential suction effect on oil fumes, in light of the above-mentioned existing technology.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an air inlet structure for a range hood, including a lower air inlet body, an air inlet guide plate installed on the top of the lower air inlet body, an air inlet on the air inlet guide plate, and a smoke guide plate provided below the air inlet guide plate, characterized in that: the air inlets are opened on all four sides of the air inlet guide plate, and the vertical projection of the air inlets falls entirely on the smoke guide plate.

[0007] Preferably, the air inlet guide plate is arranged at an angle downward from front to back, and the smoke guide plate is arranged at an angle downward from front to back.

[0008] To improve the fume extraction effect, the air inlet guide plate has a guide plate body, the air inlet is located around the guide plate body, the front edge of the guide plate body has a forward and downward bending part, the rear edge of the guide plate body has a downward bending part, and the plane where the fume guide plate is located intersects with the forward and downward bending parts.

[0009] To ensure that the oil fume airflow can fully pass through the gap between the leading edge of the smoke guide plate and the front bend and enter the air inlet, the vertical distance d1 between the leading edge of the smoke guide plate and the front bend satisfies d1≥15mm.

[0010] In order to form a stable airflow channel between the smoke guide plate and the baffle plate body, the front side and the rear side of the baffle plate body are parallel to each other and parallel to the plane where the smoke guide plate is located.

[0011] In order for the oil fume airflow to flow smoothly in the airflow channel between the smoke guide plate and the guide plate body, the vertical distance d2 between the front side of the smoke guide plate and the guide plate body and the vertical distance d5 between the smoke guide plate and the rear side of the guide plate body satisfy d2≥10mm and d5≥10mm.

[0012] In order to form an effective circumferential suction effect, the air inlet includes a front air inlet, a rear air inlet, a left air inlet, and a right air inlet. The front air inlet is located behind the front side of the guide plate body, the rear air inlet is located in front of the rear side of the guide plate body, the left air inlet is located on the left side of the guide plate body, and the right air inlet is located on the right side of the guide plate body.

[0013] In a further preferred embodiment, the rear edge of the front side of the guide plate body bends downwards and backwards to form an inclined surface, and the inlet is located on the inclined surface. With this configuration, the oil fume airflow in front of the guide plate bypasses the guide plate, and the airflow direction is at a certain angle to the plane where the inlet is located, which is more conducive to the oil fume airflow entering the inlet.

[0014] As a preferred embodiment of any of the above solutions, the rear of the lower air inlet body has a vertical air inlet channel, and a lower panel is installed on the front side of the vertical air inlet channel. The lower panel has a lower air inlet connected to the vertical air inlet channel. The rear bend extends downwards to the outlet of the vertical air inlet channel and is located on the rear side of the lower panel. The upper edge of the lower panel is higher than the lower edge of the rear bend. The smoke guide plate extends rearwards beyond the upper panel to the space between the upper panel and the rear bend. This arrangement further avoids the rear air inlet being visible, and the rear bend of the air inlet guide plate provides a certain degree of isolation between the airflow flowing out of the vertical air inlet channel and the airflow flowing in through the rear air inlet, preventing the two airflows from interfering with each other and affecting the fume extraction effect.

[0015] To improve the air intake effect of the rear air inlet, the vertical distance d3 between the upper edge of the lower panel and the smoke guide plate satisfies 5mm≤d3≤15mm, and the vertical distance d4 between the rear edge of the smoke guide plate and the rear bend satisfies 15mm≤d4≤35mm.

[0016] Compared with existing designs, the advantages of this utility model are as follows: The range hood has an air inlet guide plate installed at the top of the lower air inlet body, and a smoke guide plate installed below the air inlet guide plate. By opening air inlets around the air inlet guide plate, the oil fumes rising from the stove can be prevented from escaping from the smoke guide plate, forming a ring suction effect, which helps to improve the oil fume extraction effect. In addition, the vertical projection of the air inlet falls entirely on the smoke guide plate, and the air inlet is blocked from the user's line of sight by the smoke guide plate, resulting in a better appearance and improved user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the range hood according to an embodiment of the present utility model;

[0018] Figure 2 for Figure 1 The diagram shows the structure of the range hood from another angle.

[0019] Figure 3 for Figure 2 The diagram shows the structure of the range hood after the smoke guide plate has been removed.

[0020] Figure 4 for Figure 1 The diagram shows a cross-sectional view of the range hood.

[0021] Figure 5 for Figure 4 Enlarged view of section A;

[0022] Figure 6 for Figure 4 Enlarged view of section B;

[0023] Figure 7 for Figure 1 Another structural cross-sectional view of the range hood shown;

[0024] Figure 8 This is a schematic diagram of the air inlet guide plate according to an embodiment of the present utility model. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] like Figures 1 to 7 As shown, with Figure 4 The direction indicated by the middle arrow C is forward. The range hood in this embodiment includes an upper housing 6 and a lower air inlet 1 installed at the bottom of the upper housing 6. A range hood fan 7 is installed inside the upper housing 6. The rear of the lower air inlet 1 has a vertical air inlet channel 11. A lower panel 5 is installed on the front side of the vertical air inlet channel 11. A lower air inlet 12, connected to the vertical air inlet channel 11, is located below the lower panel 5. Oil entering through the lower air inlet 12 passes through the vertical air inlet channel 11, is drawn into the range hood fan 7, and is finally discharged outwards. This structure is existing and will not be described in detail here.

[0027] An air inlet guide plate 2 is installed on the top of the lower air inlet body 1, and a smoke guide plate 3 is provided below the air inlet guide plate 2. The air inlet guide plate 2 is arranged at an angle downward from front to back, and the smoke guide plate 3 is also arranged at an angle downward from front to back. An air inlet gap 4 is left between the smoke guide plate 3 and the air inlet guide plate 2. The air inlet guide plate 2 has a guide plate body 25, and air inlets are opened around the guide plate body 25. The air inlets are connected to the air inlet gap 4.

[0028] Combination Figure 8As shown, the air inlets in this embodiment specifically include a front air inlet 21, a rear air inlet 22, a left air inlet 23, and a right air inlet 24. The front air inlet 21 is located behind the front side of the guide plate body 25. Specifically, the rear edge of the front side of the guide plate body 25 bends downwards and backwards to form an inclined surface 28, and the front air inlet 21 is located on the inclined surface 28. With the front air inlet 21 located on the inclined surface 28, when the oil fume airflow from the front of the smoke guide plate 3 flows around the smoke guide plate towards the front air inlet 21, the airflow direction has a certain angle with the inclined surface 28, thus facilitating the smooth entry of the oil fume airflow into the front air inlet 21 and improving the oil fume extraction effect. The rear air inlet 22 is located in front of the rear side of the guide plate body 25, the left air inlet 23 is located on the left side of the guide plate body 25, and the right air inlet 24 is located on the right side of the guide plate body 25.

[0029] The vertical projections of the front air inlet 21, rear air inlet 22, left air inlet 23, and right air inlet 24 all fall on the smoke guide plate 3. For example... Figure 1 and Figure 2 As shown, the smoke guide plate 3 can block the air inlet above it, preventing the air inlet from appearing in the user's line of sight.

[0030] In this embodiment, the front and rear sides of the guide plate body 25 are parallel to each other and parallel to the plane of the smoke guide plate 3. The leading edge of the guide plate body 25 has a forward-bending portion 26 that bends downward, and the rear edge of the guide plate body 25 has a downward-bending portion 27. The plane of the smoke guide plate 3 intersects with the forward-bending portion 26 and the rear-bending portion 27. Thus, both the front and rear sides of the smoke guide plate 3 can form smoke-collecting chambers, which is beneficial to improving the smoke extraction effect. In this embodiment, let the vertical distance between the leading edge of the smoke guide plate 3 and the forward-bending portion 26 be d1, the vertical distance between the smoke guide plate 3 and the front side of the guide plate body 25 be d2, and the vertical distance between the smoke guide plate 3 and the rear side of the guide plate body 25 be d5. Then, it is necessary to satisfy d1≥15mm, d2≥10mm, and d5≥10mm. The values ​​of d1 and d2 satisfy the above numerical range, which can ensure the air intake effect of the front air inlet 21.

[0031] In this embodiment, the rear bend 27 extends downward to the outlet of the vertical air inlet channel 11 and is located on the rear side of the lower panel 5. The upper edge of the lower panel 5 is higher than the lower edge of the rear bend 27. The smoke guide plate 3 extends backward beyond the upper panel to the space between the upper panel and the rear bend 27. On the one hand, this further prevents the rear air inlet 22 from being visible. On the other hand, the rear bend 27 extends into the vertical air inlet channel 11, which can isolate the airflow flowing out of the vertical air inlet channel 11 and the airflow flowing into the rear air inlet 22, preventing the two airflows from interfering with each other and affecting the smoke extraction effect. The vertical distance d3 between the upper edge of the lower panel 5 and the smoke guide plate 3 satisfies 5mm≤d3≤15mm, and the vertical distance d4 between the rear edge of the smoke guide plate 3 and the rear bend 27 satisfies 15mm≤d4≤35mm. In addition, it is known that d5≥10mm. When the values ​​of d3, d4, and d5 meet the above value range, the air intake effect of the rear air inlet 22 can be ensured.

[0032] In addition, the range hood can be controlled by a voice module, which is equipped with a control module, a voice receiving module, and a voice parsing module. The voice receiving module receives user commands, and the voice parsing module parses the commands. Based on the parsed commands, the controller controls the range hood to perform corresponding operations, thereby realizing intelligent control of the range hood and improving the user experience.

[0033] 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.

[0034] The term "fluid connectivity" as used in this utility model refers to the spatial relationship between two components or parts, collectively referred to as the first part and the second part, meaning that 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. This third party can be a fluid channel such as a pipe, channel, conduit, flow guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. An air inlet structure for a range hood, comprising a lower air inlet body (1), an air inlet guide plate (2) installed on the top of the lower air inlet body (1), an air inlet being formed on the air inlet guide plate (2), and a smoke guide plate (3) provided below the air inlet guide plate (2), characterized in that: There is an air inlet gap (4) between the smoke guide plate (3) and the air inlet guide plate (2) to communicate with the air inlet. The air inlets are opened around the air inlet guide plate (2), and the projection of the air inlets in the vertical direction falls on the smoke guide plate (3).

2. The air inlet structure of the range hood according to claim 1, characterized in that: The air inlet guide plate (2) is arranged at an angle downward from front to back, and the smoke guide plate (3) is arranged at an angle downward from front to back.

3. The air inlet structure of the range hood according to claim 1, characterized in that: The air inlet guide plate (2) has a guide plate body (25), the air inlet is located around the guide plate body (25), the front edge of the guide plate body (25) has a forward and downward bending part (26), the rear edge of the guide plate body (25) has a downward bending part (27), and the plane where the smoke guide plate (3) is located intersects with the forward bending part (26) and the rear bending part (27).

4. The air inlet structure of the range hood according to claim 3, characterized in that: The vertical distance d1 between the front edge of the smoke guide plate (3) and the front bend (26) satisfies d1≥15mm.

5. The air inlet structure of the range hood according to claim 3, characterized in that: The front and rear sides of the guide plate body (25) are parallel to each other and parallel to the plane of the smoke guide plate (3).

6. The air inlet structure of the range hood according to claim 5, characterized in that: The vertical distance d2 between the smoke guide plate (3) and the front side of the guide plate body (25) and the vertical distance d5 between the smoke guide plate (3) and the rear side of the guide plate body (25) satisfy d2≥10mm and d5≥10mm.

7. The air inlet structure of the range hood according to claim 5, characterized in that: The air inlet includes a front air inlet (21), a rear air inlet (22), a left air inlet (23), and a right air inlet (24). The front air inlet (21) is located behind the front side of the guide plate body (25), the rear air inlet (22) is located in front of the rear side of the guide plate body (25), the left air inlet (23) is located on the left side of the guide plate body (2), and the right air inlet (24) is located on the right side of the guide plate body (25).

8. The air inlet structure of the range hood according to claim 7, characterized in that: The front side of the guide plate body (25) bends downward to form an inclined surface (28), and the forward air inlet (21) is located on the inclined surface (28).

9. The air inlet structure of the range hood according to any one of claims 3 to 8, characterized in that: The lower air inlet (1) has a vertical air inlet channel (11) at its rear. A lower panel (5) is installed on the front side of the vertical air inlet channel (11). The lower panel (5) has a lower air inlet (12) connected to the vertical air inlet channel (11) at its lower side. The rear bend (27) extends downward to the outlet of the vertical air inlet channel (11) and is located on the rear side of the lower panel (5). The upper edge of the lower panel (5) is higher than the lower edge of the rear bend (27). The smoke guide plate (3) extends backward past the upper panel to the space between the upper panel and the rear bend (27).

10. The air inlet structure of the range hood according to claim 9, characterized in that: The vertical distance d3 between the upper edge of the lower panel (5) and the smoke guide plate (3) satisfies 5mm≤d3≤15mm, and the vertical distance d4 between the rear edge of the smoke guide plate (3) and the rear bend (27) satisfies 15mm≤d4≤35mm.

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