Lifting type range hood

Abstract

A lifting type range hood comprises an upper box body and a lower box body, a fan frame is arranged in the upper box body, an oil smoke suction fan is installed in the fan frame, the lower box body is driven by a driving mechanism to do lifting motion relative to the upper box body, and a cooking module is integrated on the lower box body. An air inlet channel communicated with an air inlet of the oil smoke suction fan is arranged on the back of the cooking module, the upper box body and the lower box body are connected through a foldable movable plate, the air inlet channel is arranged below the rear portion of the movable plate, a mounting cavity isolated from the air inlet channel is formed in the front side of the movable plate, and the movable plate is in a folded state along with rising of the lower box body. And the lower box body descends to be in an unfolded state. According to the lifting type range hood, on one hand, the movable plate plays a role in isolation, the driving mechanism is isolated in the mounting cavity in the front side of the air inlet channel, and on the other hand, the movable plate also plays a role in sealing and oil guiding, so that self-adaptive sealing and oil guiding are realized, and an extra sealing and oil guiding structure does not need to be added in a narrow space of a notch between the lower box body and the upper box body.

Description

Technical Field

[0001] This utility model relates to a range hood, and more particularly to a lift-type range hood. Background Technology

[0002] Range hoods have become an indispensable appliance in modern family kitchens. With their increasing usage, people are paying more and more attention to their smoke extraction efficiency and aesthetic appeal. Traditional top-mounted range hoods are bulky, making it easy for cooks to bump their heads. If the distance between the range hood's air inlet and the area where smoke is generated is large, the smoke's intake path is longer, increasing the extraction time and making it easier for smoke to escape during cooking. Lowering the installation height of the range hood and bringing the inlet as close to the smoke source as possible, while improving smoke extraction, results in a smaller cooking space, making it easier for the cook's head to accidentally hit the smoke hood. Furthermore, a lower installation height also affects visibility and the overall appearance of the kitchen. Therefore, lift-type range hoods were invented, where the smoke inlet can be raised and lowered; it lowers when the hood is on and rises when it is off. For example, the range hood disclosed in Chinese utility model patent No. 202222918682.7 (authorization announcement No. CN 218864291 U) includes a smoke collection chamber, a fan assembly, and a lifting assembly. The fan assembly is located inside the smoke collection chamber, and the lifting assembly is connected to the smoke collection chamber, enabling the smoke collection chamber to move up and down. When the range hood is running, the lifting assembly lowers the smoke collection chamber below the cabinet, and the fan assembly starts to extract and exhaust the fumes. When the range hood is not running, the lifting assembly raises the smoke collection chamber into the cabinet, and the fan assembly turns off. For example, the Chinese utility model patent with patent number 202010007102.1 (authorization announcement number CN 111006284 B) discloses a range hood. This 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 channel for storing oil, with an oil outlet on the channel. The structure also includes an oil outlet opening and closing mechanism. When the first air inlet box is in a lowered state, the oil outlet opening and closing mechanism opens the oil outlet, thus connecting the oil storage channel and the interior of the first air inlet box. When the first air inlet box is retracted into the fan hood, the oil outlet opening and closing mechanism closes the oil outlet. In conventional lift-type range hoods, the fan system inside the upper box is fixed, while the lower box moves up and down relative to the upper box, and the lower box and upper box have a relatively closed overlapping section, thus achieving a sealed structure on all sides. For lift-type range hoods where the lower and upper housings do not have a relatively closed overlapping section, an additional sealing and oil guiding structure is needed to achieve sealing and oil guiding. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a lift-type range hood that can achieve adaptive sealing and oil guiding through the structural gap between the upper and lower housings, in light of the above-mentioned existing technology.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a lifting range hood, including an upper box and a lower box, wherein a fan frame is provided inside the upper box, and a range hood fan is installed inside the fan frame. The lower box moves up and down relative to the upper box under the drive of a drive mechanism. The lower box is characterized in that: a cooking module is integrated on the lower box, and an air inlet channel connected to the air inlet of the range hood fan is provided on the back of the cooking module. The upper box and the lower box are connected by a foldable movable plate. The air inlet channel is located at the rear lower part of the movable plate. An installation cavity is provided on the front side of the movable plate. The installation cavity is isolated from the air inlet channel by the movable plate. The movable plate is in a folded state when the lower box is raised and in an unfolded state when the lower box is lowered.

[0005] The movable plate can have various installation structures. Preferably, an upper connecting plate is installed at the bottom of the fan frame, a lower connecting plate is installed at the front edge of the air inlet channel outlet, the top of the movable plate is connected to the upper connecting plate, the bottom of the movable plate is connected to the lower connecting plate, the movable plate forms the rear side wall of the mounting cavity, and the upper connecting plate forms the top wall of the mounting cavity.

[0006] The movable plate includes an upper folding plate and a lower folding plate that can be folded together. The included angle between the upper and lower folding plates opens towards the rear. With this configuration, since there is a negative pressure on the rear side of the movable plate when it is unfolded during operation of the range hood, and the opening faces the negative pressure side, the structure is more stable when the movable plate is unfolded.

[0007] Further optimized, in the unfolded state of the movable plate, the angle between the upper and lower folding plates is 140° to 150°. Using this angle range can prevent negative pressure from drawing the movable plate inward and causing vibration or noise.

[0008] To improve the ease of installation of the movable plate, preferably, the upper and lower folding plates are integrally formed flexible components, with sheet metal parts embedded inside, forming a flip-axis structure between them. This design increases the rigidity of the upper and lower folding plates, allowing them to be directly fixed with screws without the need for additional sheet metal supports, reducing installation difficulty and improving installation efficiency.

[0009] Further preferably, the upper folding plate has an upper flange along its upper edge, and the lower folding plate has a lower flange along its lower edge. The upper flange is fixed to the upper connecting plate, and the lower flange is fixed to the lower connecting plate. This configuration, where both the upper and lower flanges possess a certain degree of rigidity, ensures the stability of the connection.

[0010] To improve the sealing of the movable plate and avoid interference when the upper and lower folding plates are folded together, the left and right sides of the upper folding plate have downward-bent lower folding edges, and the left and right sides of the lower folding plate have upward-bent upper folding edges. When the movable plate is folded, the lower folding edges are located inside the upper folding edges.

[0011] To further improve the sealing performance of the movable plate, the lower and upper folded edges overlap vertically. This design ensures that oil on the inner side of the movable plate does not overflow outwards, while also ensuring that the movable plates can overlap when the machine is not in operation, further enhancing the sealing performance.

[0012] To ensure that the air inlet duct is connected to the air inlet of the range hood, a left side panel and a right side panel are fixed to the top of the lower housing, and a back side panel is fixed above the back panel of the lower housing. When the lower housing is raised, the bottom of the fan frame sits within the area enclosed by the left side panel, the right side panel, and the back side panel. When the lower housing is lowered, the left side panel, the right side panel, and the back side panel move to the bottom of the fan frame and form a guide channel with the unfolded movable plate. The air inlet duct is connected to the air inlet of the range hood through this guide channel.

[0013] To ensure relative sealing and prevent the movable plate from scraping against the left and right side plates, a gap is left between the left edge of the movable plate and the left vertical plate, and a gap is left between the right edge of the movable plate and the right vertical plate.

[0014] The drive mechanism can have various structures. Preferably, the drive mechanism is installed inside the mounting cavity, and the drive mechanism is an electric push rod with its drive output end pointing vertically downward and fixed to the top of the cooking module. This arrangement, placing the drive mechanism inside the mounting cavity isolated from the air inlet channel, avoids contamination of the drive mechanism by oil fumes.

[0015] In order to allow the fumes to enter the fume extraction fan smoothly, the lower housing has a smoke inlet, which is connected to the air inlet of the fume extraction fan through the air inlet channel.

[0016] Compared with the prior art, the advantages of this utility model are as follows: The lifting range hood integrates a cooking module on the lower housing. The back of the cooking module is provided with an air inlet channel that communicates with the air inlet of the range hood fan. The upper housing and the lower housing are connected by a foldable movable plate. The air inlet channel is located at the lower rear of the movable plate. The movable plate is folded when the lower housing is raised and unfolded when the lower housing is lowered. On the one hand, the movable plate plays an isolation role, isolating the drive mechanism in the mounting cavity in front of the air inlet channel. On the other hand, the movable plate also plays a sealing and oil guiding role. It can automatically adjust the folding angle according to the lifting stroke to achieve adaptive sealing and oil guiding. There is no need to add an additional sealing and oil guiding structure in the narrow space between the lower housing and the upper housing, making the structure of the lifting range hood simpler. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a lift-up range hood according to an embodiment of the present utility model (lower housing in the raised state);

[0018] Figure 2 This is a schematic diagram of the structure of the movable plate in an embodiment of the present invention (folded state);

[0019] Figure 3 for Figure 2 The diagram shows a cross-sectional view of the movable plate.

[0020] Figure 4 for Figure 2 A structural cross-sectional view of the movable plate from another angle;

[0021] Figure 5 for Figure 4 An enlarged schematic diagram of part A in the middle;

[0022] Figure 6 This is a schematic diagram of the structure of the movable plate in an embodiment of the present utility model (open state);

[0023] Figure 7 This is a structural schematic diagram of a lift-up range hood according to an embodiment of the present utility model (lower housing in the lowered state);

[0024] Figure 8 for Figure 7 The diagram shows the structure of a lift-up range hood after the decorative cover has been removed.

[0025] Figure 9 for Figure 7 The diagram shows a cross-sectional view of the lifting range hood. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0027] like Figures 1 to 9 As shown, the lifting range hood of this embodiment includes an upper housing 1 and a lower housing 2. The upper housing 1 houses a fan frame 3, and a range hood 4 is installed inside the fan frame 3. The lower housing 2 moves up and down relative to the upper housing 1 under the drive of a drive mechanism 5. A cooking module 6 is integrated on the lower housing 2, and an air inlet channel 7 connected to the air inlet of the range hood 4 is located on the back of the cooking module 6. The lower housing 2 has a smoke inlet 21, which is connected to the air inlet of the range hood 4 through the air inlet channel 7. When the range hood is working, fumes are drawn in from the smoke inlet 21, enter the range hood 4 through the air inlet channel 7, and are finally discharged outwards.

[0028] The upper housing 1 and the lower housing 2 are connected by a foldable movable plate 8. The air inlet channel 7 is located at the lower rear of the movable plate 8. The front side of the movable plate 8 has a mounting cavity 9, which is isolated from the air inlet channel 7 by the movable plate 8. The drive mechanism 5 is installed in the mounting cavity 9 to prevent oil fumes from contaminating the drive mechanism 5. In this embodiment, the drive mechanism 5 is an electric push rod. The drive output end of the electric push rod is vertically downward and fixed to the top of the cooking module 6. Driven by the electric push rod, the cooking module 6 moves up and down.

[0029] The bottom of the fan frame 3 is equipped with an upper connecting plate 10, and the front edge of the air inlet channel 7 is equipped with a lower connecting plate 11. The top of the movable plate 8 is connected to the upper connecting plate 10, and the bottom of the movable plate 8 is connected to the lower connecting plate 11. The movable plate 8 forms the rear side wall of the mounting cavity 9, and the upper connecting plate 10 forms the top wall of the mounting cavity 9. The movable plate 8 is in a folded state when the lower box 2 is raised, and in an unfolded state when the lower box 2 is lowered.

[0030] In this embodiment, the movable plate 8 includes an upper folding plate 81 and a lower folding plate 82 that can be folded together. The opening direction of the included angle between the upper folding plate 81 and the lower folding plate 82 faces the rear. There is a negative pressure on the rear side of the movable plate 8, and the opening direction faces the negative pressure side, which makes the structure more stable when the movable plate is unfolded. When the movable plate 8 is unfolded, the included angle between the upper folding plate 81 and the lower folding plate 82 is 140° to 150°. By using the above-mentioned included angle range, it is possible to avoid the negative pressure pulling the movable plate 8 inward and causing certain vibration and noise.

[0031] The upper folding plate 81 and the lower folding plate 82 are integrally formed flexible components. The main body of the movable plate 8 utilizes rubber components to achieve integrated manufacturing of the upper and lower folding plates, avoiding the complex structure and sealing problems of traditional sheet metal hinge connections. Sheet metal components 83 are embedded inside the upper folding plate 81 and the lower folding plate 82. The embedded sheet metal components 83 ensure that the flipping structure has a certain rigidity, thereby ensuring the stability of the parts during movement. In addition to the embedded sheet metal components 83, the thickness of the rubber components can also be adjusted. A flipping shaft structure 84 is formed between the upper folding plate 81 and the lower folding plate 82. The flipping shaft utilizes the flexibility and thickness control of the rubber itself to achieve flipping. The upper edge of the upper folding plate 81 has an upper flange 85, and the lower edge of the lower folding plate 82 has a lower flange 86. The upper flange 85 is fixed to the upper connecting plate 10, and the lower flange 86 is fixed to the lower connecting plate 11. By adopting the above structure, the rigidity of the upper folding plate 81 and the lower folding plate 82 can be increased, thereby allowing direct fixing with screws without the need for additional sheet metal supports, reducing installation difficulty and improving installation efficiency.

[0032] In addition, the upper folding plate 81 has downward-bent lower folding edges 87 on both sides, and the lower folding plate 82 has upward-bent upper folding edges 88 on both sides. When the movable plate 8 is folded, the lower folding edges 87 are located inside the upper folding edges 88. The lower folding edges 87 and the upper folding edges 88 can improve the sealing performance, and the staggered arrangement can prevent the lower folding edges 87 and the upper folding edges 88 from interfering with each other during folding. Furthermore, the lower folding edges 87 and the upper folding edges 88 have overlapping portions in the vertical direction. With the overlapping structure, it can be ensured that the oil on the inner side of the movable plate 8 does not overflow to both ends along the inner side, and at the same time, it can be ensured that the movable plates 8 can overlap when the whole machine is not in operation, further improving the sealing performance.

[0033] In this embodiment, a left vertical plate 12 and a right vertical plate 13 are fixed to the top of the lower housing 2, and a back vertical plate 14 is fixed above the back plate of the lower housing 2. When the lower housing 2 is raised, the bottom of the fan frame 3 is located within the area enclosed by the left vertical plate 12, the right vertical plate 13, and the back vertical plate 14. When the lower housing 2 is lowered, the left vertical plate 12, the right vertical plate 13, and the back vertical plate 14 move to the bottom of the fan frame 3 and form a guide channel 15 with the unfolded movable plate 8. The air inlet channel 7 is connected to the air inlet of the range hood 4 through the guide channel 15. When the range hood is working in the lowered state, the oil fumes drawn into the lower housing 2 pass through the air inlet channel 7 and the guide channel 15 in sequence and then enter the air inlet of the range hood 4. In this embodiment, the range hood 4 is a centrifugal fan with front and rear dual air inlets, where the rear air inlet 41 is the main air inlet and the front air inlet 42 is the auxiliary air inlet. The rear air inlet 41 is located above the air inlet channel 7 and the guide channel 15. The air inlet channel 7, the guide channel 15 and the rear air inlet 41 form a straight exhaust channel. Most of the oil fumes entering the air inlet channel 7 flow directly upward and enter the rear air inlet 41. A small portion is guided by the upper connecting plate 10 and enters the front air inlet 42.

[0034] In addition, a gap is left between the left edge of the movable plate 8 and the left side plate 12, and a gap is left between the right edge of the movable plate 8 and the right side plate 13. This ensures relative sealing while preventing the movable plate 8 from scraping against the left and right side plates during movement.

[0035] 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.

Claims

1. A lifting type range hood comprising an upper cabinet (1) and a lower cabinet (2), the upper cabinet (1) being internally provided with a fan frame (3), the fan frame (3) being internally provided with a range hood fan (4), the lower cabinet (2) being driven to move up and down relative to the upper cabinet (1) by a driving mechanism (5), characterized in that: The lower cabinet (2) is integrated with a cooking module (6), the back of the cooking module (6) is provided with an air inlet channel (7) communicated with the air inlet of the range hood (4), the upper cabinet (1) and the lower cabinet (2) are connected through a foldable movable plate (8), the air inlet channel (7) is arranged below and behind the movable plate (8), the front side of the movable plate (8) is provided with a mounting cavity (9), the mounting cavity (9) is isolated from the air inlet channel (7) through the movable plate (8), the movable plate (8) is in a folded state when the lower cabinet (2) is raised, and is in an unfolded state when the lower cabinet (2) is lowered.

2. The lifting type range hood according to claim 1, characterized in that: The bottom of the fan frame (3) is provided with an upper connecting plate (10), the front edge of the outlet of the air inlet channel (7) is provided with a lower connecting plate (11), the top of the movable plate (8) is connected with the upper connecting plate (10), and the bottom of the movable plate (8) is connected with the lower connecting plate (11), the movable plate (8) forms the rear side wall of the mounting cavity (9), and the upper connecting plate (10) forms the top wall of the mounting cavity (9).

3. The lifting type range hood according to claim 2, characterized in that: The movable plate (8) comprises upper folding plates (81) and lower folding plates (82) which can be folded with each other, and the included angle between the upper folding plates (81) and the lower folding plates (82) is directed to the rear side.

4. The lifting type range hood according to claim 3, characterized in that: The upper folding plates (81) and the lower folding plates (82) are flexible parts formed integrally, the inner parts of the upper folding plates (81) and the lower folding plates (82) are embedded with metal parts (83), and a turnover shaft structure (84) is formed between the upper folding plates (81) and the lower folding plates (82).

5. The lifting hood according to claim 4, characterized in that: The upper edge of the upper folding plate (81) is provided with an upper turning edge (85), the lower edge of the lower folding plate (82) is provided with a lower turning edge (86), the upper turning edge (85) is fixed on the upper connecting plate (10), and the lower turning edge (86) is fixed on the lower connecting plate (11).

6. The lifting hood according to claim 3, characterized in that: The left and right edges of the upper folding plate (81) are provided with downwardly bent lower folding edges (87), the left and right edges of the lower folding plate (82) are provided with upwardly bent upper folding edges (88), and in the folded state of the movable plate (8), the lower folding edges (87) are arranged on the inner side of the upper folding edges (88).

7. The lifting hood according to claim 6, characterized in that: The lower folding edges (87) and the upper folding edges (88) have overlapping parts in the vertical direction.

8. The lifting type range hood according to claim 3, characterized in that: The top of the lower cabinet (2) is fixed with left and right vertical plates (12) and (13), the back plate of the lower cabinet (2) is fixed with a back vertical plate (14), in the raised state of the lower cabinet (2), the bottom of the fan frame (3) is located in the area surrounded by the left and right vertical plates (12) and (13) and the back vertical plate (14), in the lowered state of the lower cabinet (2), the left and right vertical plates (12) and (13) and the back vertical plate (14) are moved below the fan frame (3) and form a flow guide channel (15) with the unfolded movable plate (8), and the air inlet channel (7) is communicated with the air inlet of the range hood (4) through the flow guide channel (15).

9. The lifting hood according to claim 8, characterized in that: There is a gap between the left edge of the movable plate (8) and the left vertical plate (12), and there is a gap between the right edge of the movable plate (8) and the right vertical plate (13).

10. The lifting type range hood according to claim 3, characterized in that: The driving mechanism (5) is installed in the installation cavity (9), and the driving mechanism (5) is an electric push rod, and a driving output end of the electric push rod is vertically downward and fixed at the top of the cooking module (6).

Images