Lift-type range hood

Abstract

A lift-up range hood includes a range hood frame housing a range hood fan. A lift-up housing is connected to the lower part of the frame, with a smoke inlet at the bottom. The lift-up housing moves up and down relative to the frame. A movable guide plate is located below the range hood fan. The back of the guide plate is rotatably connected to the inner wall of the frame or the range hood fan via a connector. The side of the guide plate is rotatably connected to the edge of the smoke inlet. When the range hood is on, the lift-up housing descends, causing the guide plate to flip and open the smoke inlet. When the range hood is off, the lift-up housing rises, causing the guide plate to flip and close the smoke inlet. In the on state, the guide plate opens the smoke inlet, acting as a guide and bringing the smoke inlet closer to the smoke source. The lowered negative pressure zone improves smoke extraction. In the off state, the guide plate closes the smoke inlet, enhancing the range hood's aesthetics.

Description

Technical Field

[0001] This invention relates to range hoods, 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 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 placing the inlet as close to the smoke source as possible, thus expanding the negative pressure downwards, improves smoke extraction, but it also results in a smaller cooking space, making it easier for the cook's head to accidentally hit the smoke collection hood. Furthermore, a lower installation height also affects visibility and the overall appearance of the kitchen. Therefore, some current range hoods adopt an ultra-thin design with a downward-positioned smoke inlet. However, this ultra-thin design limits the effective area of ​​the connection interface, increasing the cost of performance improvements. For range hoods with a separate lifting inlet, the lack of a baffle structure on the front results in a smaller negative pressure area, leading to poor smoke extraction. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a lift-type range hood with good oil fume extraction effect and simple overall structure when the machine is turned off, in view 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: a lifting range hood, including a fan frame, a range hood fan installed inside the fan frame, a lifting box connected to the lower part of the fan frame, and a smoke inlet at the bottom of the lifting box. The lifting box is characterized in that it can move up and down relative to the fan frame under the drive of a drive mechanism. A movable guide plate is provided below the range hood fan. The back of the movable guide plate is rotatably connected to the inner wall of the fan frame or the range hood fan through a connector. The side of the movable guide plate is rotatably connected to the edge of the smoke inlet. When the range hood is turned on, the lifting box descends, causing the movable guide plate to flip to the position where the smoke inlet is open. When the range hood is turned off, the lifting box rises, causing the movable guide plate to flip to the position where the smoke inlet is closed.

[0005] The movable deflector can have multiple flipping methods. Preferably, the movable deflector can flip forward and backward or left and right.

[0006] As a preferred embodiment, the smoke inlet is arranged horizontally, and correspondingly, when the range hood is turned off, the movable guide plate is in a horizontal position.

[0007] As another preferred embodiment, the air inlet surface of the smoke inlet is inclined relative to the horizontal plane. Correspondingly, when the range hood is turned off, the movable guide plate is in an inclined position relative to the horizontal plane.

[0008] Further preferably, the air inlet surface of the smoke inlet is arranged at an upward angle from front to back or at a downward angle from front to back.

[0009] To improve the fume extraction effect, when the range hood is turned on, the movable guide plate flips inside the lifting housing, forming a smoke inlet channel between the guide plate and the inner wall of the lifting housing. Furthermore, the cross-section of the smoke inlet channel gradually decreases along the airflow direction. This makes the smoke inlet channel an acceleration channel, allowing the fumes to enter the range hood more quickly.

[0010] To allow the oil on the movable guide plate to flow into the oil cup, a smoke collection hood is installed at the bottom of the lifting box. The smoke collection hood has a smoke inlet, and an oil collection groove is provided around the smoke inlet. An oil cup connected to the oil collection groove is installed on the rear side of the smoke collection hood. The oil dripping from the movable guide plate can flow directly into the oil cup or flow into the oil cup through the oil collection groove.

[0011] To prevent oil dripping from the volute oil leak nozzle from directly falling onto the stovetop, an oil guide groove is installed below the volute oil leak nozzle of the range hood, and the vertical projection of the rear end of the oil guide groove falls onto the oil cup.

[0012] As a preferred embodiment, when the range hood is off, the movable guide plate rests on the oil collection tray. When the range hood is on, the movable guide plate is angled downwards from front to back, and the vertical projection of its rear side falls into the oil cup. In this way, the oil on the movable guide plate can flow directly into the oil cup.

[0013] The rear side of the movable guide plate has a flange that slopes downwards and backwards. In this way, when the movable guide plate is flipped to a horizontal position, the flange slopes downwards and backwards, allowing oil to be smoothly guided into the oil cup through the flange.

[0014] Preferably, the connecting member is a connecting rod, the rear end of which is hinged to the rear inner side wall of the fan frame, and the front end of which is hinged to the back of the movable guide plate. The rear side of the movable guide plate is rotatably connected to the oil collection trough. In this way, as the lifting box descends, the movable guide plate can smoothly rotate to a position that tilts downwards from front to back.

[0015] In order to make the air inlet of the fan match the airflow direction of the movable guide plate, the fume extractor fan has a single-sided air inlet, and the air inlet of the fume extractor fan is the front air inlet.

[0016] Further preferably, the range hood includes a front air inlet and a rear air inlet, with the front air inlet being the main air inlet and the rear air inlet being the auxiliary air inlet. In this way, after being guided by the movable baffle, the airflow mainly enters the range hood through the main front air inlet, which helps to improve the fume extraction effect.

[0017] As another preferred embodiment, the connecting member is a connecting rod, the front end of which is hinged to the front inner wall of the fan frame, and the rear end of which is hinged to the back of the movable guide plate. The front side of the movable guide plate is rotatably connected to the oil collection tank. When the range hood is turned on, the movable guide plate is inclined upward from front to back.

[0018] In order to make the air inlet of the fan match the airflow direction of the movable guide plate, the fume extractor fan has a single-sided air inlet, and the air inlet of the fume extractor fan is a rear air inlet.

[0019] Further preferably, the range hood includes a front air inlet and a rear air inlet, with the rear air inlet being the main air inlet and the front air inlet being an auxiliary air inlet. In this way, after being guided by the movable baffle, the airflow mainly enters the range hood through the rear main air inlet, which helps to improve the fume extraction effect.

[0020] The drive mechanism can have various structures. Preferably, the drive mechanism includes an electric push rod mounted on the fan frame and a connecting block installed at the output end of the electric push rod. The lifting box is fixed on the connecting block and moves synchronously up and down with the connecting block under the drive of the electric push rod.

[0021] In a further preferred embodiment, the electric push rod is installed at the center of the back of the fan frame, and guide rails are installed on both the left and right sides of the fan frame. The middle part of the lifting box is fixed on the connecting block, and the left and right sides of the lifting box are slidably arranged on the guide rails on the corresponding sides.

[0022] Compared with the prior art, the advantages of the present invention are as follows: the lifting box of the lifting range hood can move up and down relative to the fan frame under the drive of the drive mechanism. When the range hood is turned on, the lifting box descends, the movable guide plate flips and opens the smoke inlet. The movable guide plate plays a guiding role, and the smoke inlet is closer to the smoke source. After the negative pressure zone moves down, the smoke extraction effect can be effectively improved. When the range hood is turned off, the lifting box rises, the movable guide plate flips and closes the smoke inlet, thereby improving the overall aesthetics of the range hood. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the range hood according to Embodiment 1 of the present invention (in the off state);

[0024] Figure 2This is a schematic diagram of the structure of the range hood according to Embodiment 1 of the present invention (in the powered-on state);

[0025] Figure 3 for Figure 2 The diagram shown is a schematic of the internal structure of the range hood.

[0026] Figure 4 for Figure 2 The diagram shows a cross-sectional view of the range hood.

[0027] Figure 5 This is a schematic diagram of the structure of the range hood according to Embodiment 2 of the present invention (in the powered-on state);

[0028] Figure 6 for Figure 5 The diagram shown is a schematic of the internal structure of the range hood.

[0029] Figure 7 for Figure 5 The diagram shows a cross-sectional view of the range hood.

[0030] Figure 8 This is a schematic diagram of the range hood according to Embodiment 3 of the present invention (in the off state);

[0031] Figure 9 for Figure 8 The diagram shown is a schematic of the internal structure of the range hood.

[0032] Figure 10 for Figure 8 The diagram shows the structure of the oil collection tank of the range hood. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] Example 1:

[0035] like Figures 1 to 4 As shown, the lifting range hood of this embodiment includes a fan frame 1, a range hood fan 2 installed inside the fan frame 1, and a lifting housing 3 connected to the lower part of the fan frame 1. The lifting housing 3 can move up and down relative to the fan frame 1 under the drive of the drive mechanism. In this embodiment, the lifting housing 3 is located outside the fan frame 1.

[0036] The driving mechanism of this embodiment includes an electric push rod 91, a connecting block 92, and a guide rail 93 mounted on the fan frame 1. The electric push rod 91 is installed at the center of the back of the fan frame 1, the connecting block 92 is installed at the output end of the electric push rod 91, and the guide rail 93 is installed on the left and right sides of the fan frame 1. The center of the back plate of the lifting housing 3 is fixed to the connecting block 92, and the left and right sides of the lifting housing 3 are slidably mounted on the corresponding guide rails 93. Driven by the electric push rod 91, the lifting housing 3 moves up and down relative to the fan frame 1.

[0037] A smoke hood 6 is installed at the bottom of the lifting housing 3, and a smoke inlet 4 is opened on the smoke hood 6. In this embodiment, the smoke inlet 4 is arranged horizontally, and an oil collection trough 7 is provided around the smoke inlet 4. An oil cup 8 connected to the oil collection trough 7 is installed on the rear side of the smoke hood 6. The oil collection trough 7 can collect the oil inside the fan frame 1 and the lifting housing 3, and the oil in the oil collection trough 7 is finally directed into the oil cup 8.

[0038] A movable guide plate 5 is provided below the range hood 2. The back of the movable guide plate 5 is rotatably connected to the inner wall of the fan frame 1 via a connecting rod 12. The side of the movable guide plate 5 is rotatably connected to the edge of the smoke inlet 4. In addition, the back of the movable guide plate 5 can also be rotatably connected to the range hood 2, for example, rotatably connected to the fan casing. Figure 4 The direction indicated by arrow A is forward. The front end of connecting rod 12 is hinged to the front inner wall of fan frame 1, and the rear end of connecting rod 12 is hinged to the back of movable guide plate 5. The front side of movable guide plate 5 is rotatably connected to oil collection trough 7. Oil on movable guide plate 5 enters oil cup 8 through oil collection trough 7. An oil guide groove 11 is installed below the oil leak nozzle of the volute of the range hood 2. The vertical projection of the rear end of oil guide groove 11 falls on oil cup 8, and oil dripping from the oil leak nozzle of the volute flows into oil cup 8 through oil guide groove 11.

[0039] When the range hood is on, the lifting housing 3 descends, and the connecting rod 12 drives the movable guide plate 5 to flip back and forth into the interior of the lifting housing 3, tilting it upwards from front to back. Oil dripping from the movable guide plate 5 flows into the oil cup 8 through the oil collection trough 7. At this time, the smoke inlet 4 is opened, forming a smoke inlet channel 10 between the movable guide plate 5 and the inner wall of the lifting housing 3. Furthermore, the cross-section of the smoke inlet channel 10 gradually decreases along the airflow direction, thus forming an airflow acceleration channel, which helps improve the smoke extraction effect. Additionally, the downward movement of the smoke inlet 4 brings it closer to the smoke source, lowering the negative pressure zone and further enhancing the smoke extraction effect. When the range hood is off, the lifting housing 3 rises, and the connecting rod 12 drives the movable guide plate 5 to a horizontal position, closing the smoke inlet 4, which improves the overall aesthetics of the range hood.

[0040] The fume extractor 2 in this embodiment includes a front air inlet 21 and a rear air inlet 22. To match the tilt direction of the movable guide plate 5, the rear air inlet 22 is the main air inlet, and the front air inlet 21 is the auxiliary air inlet. Under the guidance of the movable guide plate 5, the fumes drawn in from the fume inlet 4 can enter the rear air inlet 22 more smoothly. Of course, the fume extractor 2 also adopts a single-sided air inlet structure, and the air inlet of the fume extractor 2 is the rear air inlet.

[0041] Example 2:

[0042] like Figures 5 to 7 As shown, with Figure 7 The direction indicated by arrow B is forward. In this embodiment, the rear end of the connecting rod 12 is hinged to the rear inner wall of the fan frame 1, and the front end of the connecting rod 12 is hinged to the back of the movable guide plate 5. The rear side of the movable guide plate 5 is rotatably connected to the oil collection tank 7. When the range hood is turned on, the movable guide plate 5 is inclined downward from front to back, and the vertical projection of the rear side of the movable guide plate 5 falls into the oil cup 8. Furthermore, the rear side of the movable guide plate 5 forms a flange 51 that tilts downward and backward, which smoothly guides the oil on the movable guide plate 5 directly into the oil cup 8. At this time, the smoke inlet 4 is opened, and a smoke inlet channel 10 is formed between the movable guide plate 5 and the inner wall of the lifting box 3. Moreover, along the airflow direction, the cross-section of the smoke inlet channel 10 gradually decreases, thereby forming an airflow acceleration channel, which is beneficial to improving the smoke extraction effect. When the range hood is turned off, the movable guide plate 5 is placed on the oil collection tank 7 to close the smoke inlet 4.

[0043] The fume extractor 2 in this embodiment includes a front air inlet 21 and a rear air inlet 22. To match the tilt direction of the movable guide plate 5, the front air inlet 21 is the main air inlet, and the rear air inlet 22 is the auxiliary air inlet. Under the guidance of the movable guide plate 5, the fumes drawn in from the smoke inlet 4 can enter the front air inlet 21 more smoothly. Of course, the fume extractor 2 also adopts a single-sided air inlet structure, and the air inlet of the fume extractor 2 is the front air inlet.

[0044] Example 3:

[0045] like Figures 8 to 10 As shown, in addition to the horizontal arrangement as in Embodiments 1 and 2, the air inlet surface of the smoke inlet 4 can also be arranged at an angle relative to the horizontal plane. Figure 9The direction indicated by arrow C is forward. In this embodiment, the air inlet surface of the smoke inlet 4 is arranged obliquely upward from front to back. An oil collection groove 7 is formed around the smoke inlet 4. The oil collection groove 7 has an oil guiding bottom surface 72 and an oil guiding inclined surface 73. An oil leakage hole 71 is opened at the rear of the oil guiding bottom surface 72. The oil cup 8 is installed below the rear of the oil collection groove 7. When the range hood is turned off, the movable guide plate 5 closes the smoke inlet 4 and is arranged obliquely upward from front to back. Similar to Embodiment 1, an oil guiding groove 11 is installed below the oil leakage nozzle of the volute of the range hood 2. The vertical projection of the rear end of the oil guiding groove 11 falls on the oil cup 8.

[0046] Oil on the movable guide plate 5 flows into the oil guide bottom surface 72 of the oil collection tank 7 and into the oil cup 8 through the oil drain hole 71. Oil dripping from the volute oil drain nozzle flows into the oil cup 8 through the oil guide groove 11. Oil dripping from the fan frame 1 and the lifting box 3 onto the oil guide slope 73 flows along the oil guide slope 73 into the oil guide bottom surface 72, and finally into the oil cup 8 through the oil drain hole 71.

[0047] In addition, the smoke inlet 4 can also be arranged at an angle from front to back and downward. In this case, the oil on the movable guide plate 5 is directly introduced into the oil cup 8.

Claims

1. A lifting type range hood, comprising a fan frame (1), a range hood fan (2) is installed inside the fan frame (1), a lifting box body (3) is connected to the lower part of the fan frame (1), and a smoke inlet (4) is arranged at the bottom of the lifting box body (3), characterized in that: The lifting box (3) can move up and down relative to the fan frame (1) under the drive of the drive mechanism, and a movable guide vane (5) is arranged below the range hood fan (2), the back of the movable guide vane (5) is rotatably connected with the inner wall of the fan frame (1) or the range hood fan (2) through a connecting piece, and the side edge of the movable guide vane (5) is rotatably connected with the edge of the smoke inlet (4), in the on state of the range hood, the lifting box (3) is lowered to drive the movable guide vane (5) to turn to the position of opening the smoke inlet (4), and in the off state of the range hood, the lifting box (3) is raised to drive the movable guide vane (5) to turn to the position of closing the smoke inlet (4).

2. The lifting type range hood according to claim 1, characterized in that: The movable guide vane (5) is flipped forward and backward or left and right.

3. The lifting type range hood according to claim 1, characterized in that: The smoke inlet (4) is horizontally arranged, and correspondingly, in the off state of the range hood, the movable guide vane (5) is in a horizontal position.

4. The lifting hood according to claim 1, characterized in that: The air inlet surface of the smoke inlet (4) is arranged to be inclined relative to the horizontal plane, and correspondingly, in the off state of the range hood, the movable guide vane (5) is in an inclined position relative to the horizontal plane.

5. The lifting hood according to claim 4, characterized in that: The air inlet surface of the smoke inlet (4) is arranged to be inclined upward from front to back or inclined downward from front to back.

6. The lifting hood according to claim 1, characterized in that: In the on state of the range hood, the movable guide vane (5) is flipped to the inside of the lifting box (3), a smoke inlet channel (10) is formed between the movable guide vane (5) and the inner wall of the lifting box (3), and the cross section of the smoke inlet channel (10) gradually decreases along the airflow direction.

7. The lifting hood according to claim 6, characterized in that: The bottom of the lifting box (3) is provided with a smoke collecting cover (6), the smoke inlet (4) is arranged on the smoke collecting cover (6), the smoke inlet (4) is provided with an oil collecting groove (7), the rear side of the smoke collecting cover (6) is provided with an oil cup (8) connected with the oil collecting groove (7), and the oil dripping from the movable guide vane (5) can directly flow into the oil cup (8) or flow into the oil cup (8) through the oil collecting groove (7).

8. The lifting hood according to claim 7, characterized in that: A guide oil groove (11) is arranged below the volute oil leakage nozzle of the range hood fan (2), and the vertical projection of the rear end of the guide oil groove (11) falls on the oil cup (8).

9. The lifting hood according to claim 7, characterized in that: In the off state of the range hood, the movable guide vane (5) is arranged on the oil collecting groove (7), and in the on state of the range hood, the movable guide vane (5) is arranged to be inclined downward from front to back, and the vertical projection of the rear side of the movable guide vane (5) falls into the oil cup (8).

10. The lifting hood according to claim 9, characterized in that: The rear side of the movable guide vane (5) is formed with a rear downward inclined flange (51).

11. The lifting hood according to claim 9, characterized in that: The connecting piece is a connecting rod (12), the rear end of the connecting rod (12) is hinged to the rear inner wall of the fan frame (1), the front end of the connecting rod (12) is hinged to the back of the movable guide vane (5), and the rear side of the movable guide vane (5) is rotatably connected with the oil collecting groove (7).

12. The lifting hood according to claim 9, characterized in that: The range hood fan (2) is single-sided air inlet, and the air inlet of the range hood fan (2) is a front air inlet.

13. The lifting hood according to claim 9, characterized in that: The range hood fan (2) comprises a front air inlet and a rear air inlet, and the front air inlet is a main air inlet, and the rear air inlet is an auxiliary air inlet.

14. The lifting hood according to claim 7, characterized in that: The connecting piece is a connecting rod (12), the front end of the connecting rod (12) is hinged to the front inner side wall of the fan frame (1), the rear end of the connecting rod (12) is hinged to the back of the movable guide vane (5), the front side edge of the movable guide vane (5) is rotationally connected to the oil collecting groove (7), and in the state of starting the extractor hood, the movable guide vane (5) is obliquely upwardly arranged from front to back.

15. The lifting hood according to claim 14, characterized in that: The extractor hood (2) is single-side air inlet, and the air inlet of the extractor hood (2) is a rear air inlet.

16. The lifting hood according to claim 14, characterized in that: The extractor hood (2) comprises a front air inlet and a rear air inlet, and the rear air inlet is a main air inlet, and the front air inlet is an auxiliary air inlet.

17. The lifting hood according to any one of claims 1 to 16, characterized in that: The driving mechanism comprises an electric push rod (91) arranged on the fan frame (1) and a connecting block (92) mounted on the output end of the electric push rod (91), and the lifting box body (3) is fixed on the connecting block (92) and synchronously moves up and down with the connecting block (92) under the driving of the electric push rod (91).

18. The lifting hood according to claim 17, characterized in that: The electric push rod (91) is arranged at the left and right middle positions of the back of the fan frame (1), the left and right sides of the fan frame (1) are both provided with guide rails (93), the middle part of the lifting box body (3) is fixed on the connecting block (92), and the left and right sides of the lifting box body (3) are respectively slidably arranged on the guide rails (93) on the corresponding sides.

Images