A lifting type range hood

Abstract

A lifting type range hood, the lower box is arranged on the upper box and can move up and down relative to the upper box, the air inlet body is arranged on the lower box and can move up and down relative to the lower box, the oil cup is installed at the bottom of the air inlet body, the oil guide side plates are installed on the left and right sides inside the lower box, the first oil guide member is installed inside the lower box, the second oil guide member is installed on the air inlet body, the oil liquid inside the upper box can flow into the first oil guide member and the second oil guide member through the inner wall of the oil guide side plate, the second oil guide member is located below the first oil guide member to receive the oil liquid dropped from the first oil guide member, and the oil liquid flowing into the second oil guide member from the oil guide side plate and the first oil guide member finally flows into the oil cup. The lifting type range hood effectively solves the left and right side oil path problems inside the range hood by installing the oil guide side plates on the left and right sides inside the lower box, which can not only avoid the oil liquid in the upper box from overflowing from the lower box, but also avoid the oil liquid on the oil guide side plates inside the lower box from flowing out to the outside of the air inlet body.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a lift-type range hood. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, typically housing a fan that draws in and exhausts cooking fumes, while a filter removes some grease particles. Over time, oil accumulates inside the range hood, affecting its smoke extraction efficiency and lifespan. Therefore, the internal oil channels of the range hood need to be designed to ensure that the oil flows smoothly into the grease cup. Various range hoods that solve oil circuit problems are disclosed in the prior art, such as the Chinese invention patent "A Range Hood" disclosed in patent number 202010007102.1 (authorization announcement number CN 111006284 B). The range hood has an oil guiding structure inside the fan hood for guiding the oil discharged from the fan hood and fan system into the first air inlet box. The oil guiding structure includes an oil storage guide groove that can store oil, and an oil outlet is opened on the oil storage guide groove. The oil guiding structure also includes an oil outlet opening and closing mechanism. When the first air inlet box is in the lowered state, the oil outlet opening and closing mechanism opens the oil outlet, thereby connecting the oil storage guide groove and the inside of the first air inlet box. When the first air inlet box is in the retracted state inside the fan hood, the oil outlet opening and closing mechanism closes the oil outlet. Although this range hood collects oil into the oil collection device of the air intake assembly, solving the oil path problem of a single oil collection device in a built-in lift-type range hood, it only addresses the oil path issue of a single-stage lift-type range hood. For a double-stage lift-type range hood, the overall structure is not completely fixed. Ensuring the reliability of the overall connection and the sealing of the flow channel during the lifting process becomes a problem that needs to be solved. This requires addressing both the oil path between the upper and lower housings and the oil path between the lower housing and the air intake. For example, Chinese utility model patents 202221698878.3 (authorization announcement number CN217876026U) and 201821783223.X (authorization announcement number CN209355322 U) disclose a "concealed range hood." While both disclose a lift-type range hood that lowers the air intake to create a negative pressure zone and improve smoke extraction, ensuring the reliability of the overall connection and the sealing of the flow channel during the lifting process remains a problem that needs to be solved. In conclusion, further improvements to existing lift-type range hoods are necessary. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a lift-type range hood that can solve the problem of oil circuits on the left and right sides inside the range hood, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: The lifting range hood includes an upper box, a lower box, and an air inlet. The lower box is located on the upper box and can move up and down relative to the upper box. The air inlet is located on the lower box and can move up and down relative to the lower box. An oil cup is installed at the bottom of the air inlet. The feature is that oil guiding side plates are installed on both the left and right sides inside the lower box. A first oil guiding component is installed inside the lower box. A second oil guiding component is installed on the air inlet. The oil in the upper box can be guided through the inner wall of the oil guiding side plate to the first and second oil guiding components. The second oil guiding component is located below the first oil guiding component to receive the oil dripping from the first oil guiding component. The oil flowing from the oil guiding side plate and the first guiding component to the second oil guiding component finally flows into the oil cup.

[0005] The oil-guiding side plate can have various structures. Preferably, the oil-guiding side plate includes a vertically arranged inner side plate, a middle plate extending obliquely downward from the lower edge of the inner side plate, and an outer side plate extending vertically downward from the outer edge of the middle plate. The inner side plate is located on the outer side of the upper housing, and the vertical projection of the outer side plate falls on the first and second oil-guiding components. With this arrangement, the oil on the left and right inner walls of the upper housing can only fall into the inner side of the inner side plate. The oil on the inner side plate flows to the outer side plate, and the oil on the outer side plate finally falls into the first and second oil-guiding components. Furthermore, the connection points of the oil-guiding side plate with the front and rear sides are not collinear, which helps to improve the stability and reliability of the overall connection.

[0006] In order to smoothly guide the oil on the outer side plate of the oil guide plate to the first guide plate and the second guide plate, the first oil guide is a first oil guide plate extending from front to back, and the second oil guide is a second oil guide plate located below and behind the first oil guide. The outer side plate has a front oil guide wall and a rear oil guide wall. The projection of the front oil guide wall in the vertical direction falls on the first oil guide plate, and the projection of the rear oil guide wall in the vertical direction falls on the second oil guide plate.

[0007] Further preferably, the second oil guide plate is a grid plate, which has a front oil guide surface and left and right oil guide surfaces. The first oil guide plate is inclined downwards from front to back, and the projection of the rear edge of the first oil guide plate in the vertical direction falls on the front oil guide surface. The projection of the rear oil guide wall of the oil guide side plate in the vertical direction falls on the left and right oil guide surfaces. With this arrangement, oil falling on the first oil guide plate can drip onto the second oil guide plate, and oil on the rear oil guide wall of the oil guide side plate can drip onto the second oil guide plate.

[0008] In order to allow the oil on the front oil guide wall of the oil guide plate to flow smoothly into the first oil guide plate, the left and right edges of the first oil guide plate are both folded upwards, and the lower edge of the front oil guide wall is folded inwards. The inner edge is located inside the folded edge and adjacent to the first oil guide plate.

[0009] Further preferably, the lower edge of the inner folded edge is lower than the upper edge of the upper folded edge. This arrangement can prevent oil flowing down the front oil guide wall of the oil guide side plate from overflowing from the first oil guide plate.

[0010] In order to allow the oil on the rear oil guide wall of the oil guide plate to flow through the extensions on both sides of the air inlet body to the second oil guide plate, the air inlet body includes an air inlet and extensions extending vertically upward from the left and right sides of the air inlet. The air inlet is located on the rear side of the first oil guide plate, the second oil guide plate is installed on the top of the air inlet, the rear oil guide wall is located on the inner side of the extension, and the projection of the inner wall surface of the extension in the vertical direction falls on the second oil guide plate.

[0011] Further preferably, when the air inlet body is lowered to its lowest position, the upper edge of the extension is not lower than the lower edge of the rear oil guide wall. This configuration prevents oil flowing down the rear oil guide wall from overflowing onto the outer wall of the extension, thereby keeping the exterior of the air inlet body clean.

[0012] In order to fix the oil guide side plate inside the upper housing, the first oil guide plate has an upper front plate that is bent vertically upward at the front edge. The oil guide side plate has a front flange and a rear flange. The front flange is directly or indirectly fixed to the upper front plate, and the rear flange is directly or indirectly fixed to the back plate of the lower housing.

[0013] To make the installation structure of the oil guide side plate more secure, the top edge of the inner side plate is formed with a folded edge, which is fixed to the top plate of the lower housing.

[0014] In order to achieve a seal between the oil guide side plate and the upper housing, the upper housing includes a fan frame and a decorative cover covering the outside of the fan frame. Sealing strips are installed on the left and right sides of the bottom of the fan frame. The inner side plate of the oil guide side plate is located outside the decorative cover and is sealed to the fan frame through the sealing strips.

[0015] To prevent oil fumes from leaking at the connection between the oil guide side plate and the upper housing during operation, the upper part of the inner side plate of the oil guide side plate is sealed to the fan frame by the sealing strip when the lower housing is lowered to its lowest position.

[0016] In order to enable the lower housing and the air inlet to move up and down synchronously, the lower housing and the air inlet are driven by the drive mechanism to move up and down synchronously.

[0017] As a preferred embodiment of any of the above solutions, a fan system is installed inside the upper housing.

[0018] Compared with the prior art, the advantages of the present invention are as follows: The lifting range hood has oil guiding side plates installed on the left and right sides inside the lower box, a first oil guiding component installed inside the lower box, and a second oil guiding component installed on the air inlet. The oil in the upper box can be guided to the first and second oil guiding components through the inner wall of the oil guiding side plates. The oil on the first oil guiding component can flow to the second oil guiding component, and the oil collected on the second oil guiding component finally flows into the oil cup. The oil guiding side plates improve the reliability of the overall connection and ensure the relative sealing of the flow channel. At the same time, they are conducive to the accumulation of oil and the improvement of the smoke extraction effect. On the other hand, they also effectively solve the problem of the left and right oil paths inside the range hood, which can prevent the oil in the upper box from overflowing from the lower box and prevent the oil on the oil guiding side plates inside the lower box from flowing out to the outside of the air inlet. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention (in a non-working state);

[0020] Figure 2 for Figure 1 The diagram shown is a schematic of the internal structure of the range hood.

[0021] Figure 3 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention (in its working state);

[0022] Figure 4 for Figure 3 The diagram shown is a structural schematic of the range hood after removing components such as the lower cabinet back panel.

[0023] Figure 5 for Figure 3 The diagram shows a cross-sectional view of the range hood.

[0024] Figure 6 for Figure 5 An enlarged schematic diagram of section D in the middle;

[0025] Figure 7 for Figure 5 An enlarged schematic diagram of section E in the middle;

[0026] Figure 8 This is a schematic diagram of the structure of the oil guide side plate according to an embodiment of the present invention. Detailed Implementation

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

[0028] like Figures 1 to 8As shown, the lift-type range hood of this embodiment includes an upper housing 1, a lower housing 2, and an air inlet 3. A fan system 10 is installed inside the upper housing 1. The lower housing 2 is located on the upper housing 1 and can move up and down relative to the upper housing 1. Furthermore, the lower housing 2 encloses the upper housing 1. Figure 4 The direction indicated by the middle arrow B is forward. The air inlet 3 is housed at the rear of the lower housing 2 and can move up and down relative to the lower housing 2. An oil cup 4 is installed at the bottom of the air inlet 3. The lower housing 2 and the air inlet 3 can move synchronously under the drive of a set of drive mechanisms 9, or they can move independently under the drive of independent drive mechanisms.

[0029] like Figure 2 , Figure 4 and Figure 5 As shown, with Figure 2 The direction indicated by the middle arrow A is backward. Figure 5 The direction indicated by the middle arrow C is to the right. Oil guide side plates 5 are installed on both the left and right sides inside the lower housing 2. The first oil guide component is installed inside the lower housing 2, and the second oil guide component is installed on the air inlet 3. The oil in the upper housing 1 can be guided through the inner wall of the oil guide side plate 5 to the first and second oil guide components. The second oil guide component is located below the first oil guide component to receive the oil dripping from the first oil guide component. The oil flowing from the oil guide side plate 5 and the first guide component to the second oil guide component finally flows into the oil cup 4.

[0030] In this embodiment, the oil guide side plate 5 includes a vertically arranged inner side plate 51, a middle plate 52 extending obliquely downward from the lower edge of the inner side plate 51, and an outer side plate 53 extending vertically downward from the outer edge of the middle plate 52. In this embodiment, the middle plate 52 is a flat plate. The inner side plate 51 is located on the outside of the upper housing 1. The upper housing 1 includes a fan frame 11 and a decorative cover 12 covering the outside of the fan frame 11. Sealing strips 8 are installed on the left and right sides of the bottom of the fan frame 11. The inner side plate 51 of the oil guide side plate 5 is located on the outside of the decorative cover 12 and is sealed to the fan frame 11 by the sealing strips 8. Figure 5 and Figure 6 As shown, when the lower housing 2 is lowered to its lowest position, i.e., in the working state, the upper part of the inner side plate 51 of the oil guide plate 5 is sealed to the fan frame 11 by the sealing strip 8, thereby suppressing oil escape. Installing the aforementioned oil guide plate 5 inside the lower housing 2 serves two purposes: firstly, it guides the oil, helping to gather the oil inside the oil guide plate 5 to both sides, reducing the problem of disorderly oil dripping during the process; secondly, a narrow air inlet channel is formed between the left and right oil guide plates 5, wider at the bottom and narrower at the top. Under the guidance of this air inlet channel, the oily airflow entering the lower housing 2 from the smoke inlet 30 of the air inlet 3 can quickly flow into the fan system 10, improving the oil fume extraction effect.

[0031] In this embodiment, the first oil guiding element is a first oil guiding plate 6 extending from front to back, and the first oil guiding plate 6 is inclined downward from front to back. The second oil guiding element is a second oil guiding plate 7 located below and behind the first oil guiding element. Specifically, the second oil guiding plate 7 is a grille plate installed on the top of the air inlet 3. The grille plate has a front oil guiding surface 71 and left and right oil guiding surfaces 72. The projection of the rear edge of the first oil guiding plate 6 in the vertical direction falls on the front oil guiding surface 71.

[0032] like Figure 7 and Figure 8 As shown, the outer side plate 53 has a front oil guide wall 531 and a rear oil guide wall 532. Both the front oil guide wall 531 and the rear oil guide wall 532 serve to guide oil. The vertical projection of the front oil guide wall 531 falls on the first oil guide plate 6. The left and right edges of the first oil guide plate 6 have upwardly folded upper edges 61, and the lower edge of the front oil guide wall 531 has an inwardly folded inner edge 533. The inner edge 533 is located inside the upper edge 61 and adjacent to the first oil guide plate 6, and the lower edge of the inner edge 533 is lower than the upper edge of the upper edge 61. Thus, the oil on the front oil guide wall 531 of the oil guide side plate 5 can flow smoothly into the first oil guide plate 6.

[0033] The vertical projection of the rear oil guide wall 532 falls on the left and right oil guide surfaces 72 of the second oil guide plate 7. The air inlet 3 includes an air inlet portion 31 and extension portions 32 extending vertically upwards from the left and right sides of the air inlet portion 31. The air inlet portion 31 is located behind the first oil guide plate 6, and the second oil guide plate 7 is mounted on top of the air inlet portion 31. The rear oil guide wall 532 is located inside the extension portions 32, and the vertical projection of the inner wall surface of the extension portion 32 falls on the second oil guide plate 7. Figure 4 As shown, when the air inlet 3 is lowered to its lowest position, the upper edge of the extension 32 is not lower than the lower edge of the rear oil guide wall 532. In this way, the extension 32 can be connected with the rear oil guide wall 532. While ensuring the oil fume extraction effect, it can prevent the oil on the rear oil guide wall 532 from flowing out to the outer surface of the extension 32, reducing the risk of oil leakage.

[0034] In this embodiment, the specific installation structure of the oil guide side plate 5 is as follows:

[0035] The first oil guide plate 6 has an upper front plate 62 that bends vertically upwards at its leading edge. The oil guide side plate 5 has a front flange 54 and a rear flange 55, and the top edge of the inner side plate 51 forms a folded edge 511. The front flange 54 is directly or indirectly fixed to the upper front plate 62, the rear flange 55 is directly or indirectly fixed to the back plate 21 of the lower housing 2, and the folded edge 511 is fixed to the top plate 22 of the lower housing 2. In this way, the top and both the front and rear sides of the oil guide side plate 5 are connected and fixed, and the installation structure is very strong.

[0036] In non-working state, such as Figure 1and Figure 2 As shown, when the lower casing 2 rises to its highest position, the air intake 3 rises to its highest position simultaneously and is hidden inside the lower casing 2. The bottom surface of the oil cup 4 is flush with the bottom surface of the lower casing 2. The overall size of the range hood is small and can be completely hidden in the cabinet, making it more concise and beautiful.

[0037] In working state, such as Figures 3 to 7 As shown, the lower housing 2 descends to its lowest position, and the air inlet 3 simultaneously descends to its lowest position and extends downwards from the bottom of the lower housing 2. The smoke inlet 30 of the air inlet 3 is exposed, and the negative pressure zone descends to improve the smoke extraction effect. When the range hood is working for a long time, oil will remain on the inner walls of the fan frame 11 on both sides. The oil can either drip directly from the inner walls of the fan frame 11 onto the first oil guide plate 6, or it can first flow onto the oil guide side plate 6, and then flow along the oil guide side plate 6 into the first oil guide plate 6 and the second oil guide plate 7, and finally drip from the second oil guide plate 7 into the oil cup 4, thus solving the problem of left and right side oil passages inside the range hood.

[0038] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A liftable range hood, comprising an upper housing (1), a lower housing (2), and an air inlet (3), wherein the lower housing (2) is disposed on the upper housing (1) and can move up and down relative to the upper housing (1), and the air inlet (3) is disposed on the lower housing (2) and can move up and down relative to the lower housing (2), wherein an oil cup (4) is installed at the bottom of the air inlet (3), characterized in that: The oil guide side plate (5) is arranged on the left and right sides inside the lower box (2), the first oil guide member is arranged inside the lower box (2), the second oil guide member is arranged on the air inlet body (3), the oil in the upper box (1) can flow into the first oil guide member and the second oil guide member through the inner wall of the oil guide side plate (5), the second oil guide member is arranged below the first oil guide member to receive the oil dropping from the first oil guide member, the oil flowing into the second oil guide member from the oil guide side plate (5) and the first oil guide member finally flows into the oil cup (4), the oil guide side plate (5) comprises an inner side plate (51) arranged vertically, a middle plate (52) extending obliquely downward from the inner side plate (51) from inside to outside, and an outer side plate (53) extending vertically downward from the outer side of the middle plate (52), the inner side plate (51) is arranged on the outer side of the upper box (1), the projection of the outer side plate (53) in the vertical direction falls on the first oil guide member and the second oil guide member, and the fan system (10) is arranged inside the upper box (1).

2. The lifting type range hood according to claim 1, characterized in that: The first oil guide member is a first oil guide plate (6) extending from front to back, the second oil guide member is a second oil guide plate (7) arranged below the rear of the first oil guide member, the outer side plate (53) has a front oil guide wall (531) and a rear oil guide wall (532), the projection of the front oil guide wall (531) in the vertical direction falls on the first oil guide plate (6), and the projection of the rear oil guide wall (532) in the vertical direction falls on the second oil guide plate (7).

3. The lifting type range hood according to claim 2, characterized in that: The second oil guide plate (7) is a grid plate, the grid plate has a front side oil guide surface (71) and left and right side oil guide surfaces (72), the first oil guide plate (6) is arranged obliquely downward from front to back, the projection of the rear edge of the first oil guide plate (6) in the vertical direction falls on the front side oil guide surface (71), and the projection of the rear oil guide wall (532) of the oil guide side plate (5) in the vertical direction falls on the left and right side oil guide surfaces (72).

4. The lifting type range hood according to claim 2, characterized in that: The left edge and the right edge of the first oil guide plate (6) each have an upwardly folded upper folding edge (61), the lower edge of the front oil guide wall (531) has an inwardly folded inner folding edge (533), the inner folding edge (533) is arranged on the inner side of the upper folding edge (61) and is adjacent to the first oil guide plate (6).

5. The lifting hood according to claim 4, characterized in that: The lower edge of the inner folding edge (533) is lower than the upper edge of the upper folding edge (61).

6. The lifting hood according to claim 2, characterized in that: The air inlet body (3) comprises an air inlet part (31) and an extension part (32) extending vertically upward from the left and right sides of the air inlet part (31), the air inlet part (31) is arranged on the rear side of the first oil guide plate (6), the second oil guide plate (7) is arranged on the top of the air inlet part (31), the rear oil guide wall (532) is arranged on the inner side of the extension part (32), and the projection of the inner wall surface of the extension part (32) in the vertical direction falls on the second oil guide plate (7).

7. The lifting hood according to claim 6, characterized in that: In the state that the air inlet body (3) is lowered to the lowest position, the upper edge of the extension part (32) is not lower than the lower edge of the rear oil guide wall (532).

8. The lifting hood according to claim 2, characterized in that: The first oil guide plate (6) has a vertical upwardly bent upper front plate (62) at the front edge, and the oil guide side plate (5) has a front side flange (54) and a rear side flange (55), the front side flange (54) being directly or indirectly fixed to the upper front plate (62), and the rear side flange (55) being directly or indirectly fixed to the back plate (21) of the lower cabinet (2).

9. The lifting hood according to claim 8, characterized in that: The top edge of the inner side plate (51) is formed with a folded flange (511) fixed to the top plate (22) of the lower cabinet (2).

10. The lifting hood according to claim 1, characterized in that: The upper cabinet (1) comprises a fan frame (11) and a decorative cover (12) covering the outside of the fan frame (11), and the left and right sides of the bottom of the fan frame (11) are provided with sealing strips (8), and the inner side plate (51) of the oil guide side plate (5) is arranged outside the decorative cover (12) and is sealed with the fan frame (11) by the sealing strips (8).

11. The lifting hood according to claim 10, characterized in that: In the state that the lower cabinet (2) is lowered to the lowest position, the upper part of the inner side plate (51) of the oil guide side plate (5) is sealed with the fan frame (11) by the sealing strips (8).

12. The lifting hood according to any one of claims 1 to 11, characterized in that: The lower cabinet (2) and the air inlet body (3) are driven to move synchronously by the driving mechanism (9).

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