A lifting type range hood

Abstract

The application relates to a lifting type range hood, which comprises an upper box body, a lower box body and an air inlet body, the lower box body is arranged on the upper box body, the air inlet body is arranged on the lower box body and can move up and down relative to the lower box body, an oil cup is arranged at the bottom of the air inlet body, the lower box body is provided with a first oil guide channel, the projection of the front side of the upper box body in the vertical direction falls into the first oil guide channel, the air inlet body is provided with a second oil guide channel which is communicated with the first oil guide channel, and the oil in the upper box body can enter the oil cup through the first oil guide channel and the second oil guide channel in sequence. The oil in the upper box body of the lifting type range hood can enter the oil cup at the bottom of the air inlet body through the first oil guide channel and the second oil guide channel in sequence, the oil path structure is relatively simple, the oil path problem of the lifting type range hood is effectively solved, and the oil in the upper box body can be prevented from directly dropping on the cooking bench.

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. For example, the Chinese invention patent "A Range Hood" disclosed in patent number 202010294463.9 (authorization announcement number CN 1111425902B) includes a range hood with an oil guiding structure comprising a first oil guiding groove assembly for collecting condensed oil from a second air inlet box and a fan, and a second oil guiding groove assembly for guiding the condensed oil collected in the first oil guiding groove assembly into an oil cup. The first oil guiding groove assembly is located on the lower inner periphery of the second air inlet box. This range hood is a lift-type range hood, which can achieve a downward shift of the negative pressure zone by lowering the first air inlet box, thereby improving the smoke extraction effect. Furthermore, by setting up an oil guiding structure, it can transfer condensed oil from the fixed part of the range hood to the moving part, and has advantages such as reducing the risk of blockage and a small pollution area. However, there is a risk that oil in the upper box may overflow from the lower box. 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 improve smoke extraction by lowering the air intake to shift the negative pressure zone, they do not solve the oil path problem faced by lift-type range hoods. In conclusion, further improvements to existing lift-type range hoods are needed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a lifting range hood with a two-stage lifting structure, in which the oil in the upper chamber can be sequentially introduced into the oil cup through the lower chamber and the air inlet body, 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: the lifting range hood includes an upper box, a lower box, and an air inlet. The lower box is disposed on the upper box, and the air inlet is disposed 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 lower box has a first oil guiding channel, the projection of the front side of the upper box in the vertical direction falls into the first oil guiding channel, and the air inlet has a second oil guiding channel that is connected to the oil passage of the first oil guiding channel. The oil in the upper box can enter the oil cup in sequence through the first oil guiding channel and the second oil guiding channel.

[0005] The first oil guide channel can have various structures. Preferably, the first oil guide channel includes an upper front plate with an L-shaped structure. The upper front plate is fixed inside the lower housing. The upper front plate has a vertically arranged first plate and a second plate that bends backward from the lower edge of the first plate.

[0006] In a further preferred embodiment, the first plate is close to the front wall of the lower housing, and the second plate is located in the middle region of the lower housing in the height direction.

[0007] In order to enable the first oil guide channel to receive the oil dripping from the blower, a blower is installed in the upper box, and the blower is located above the second plate.

[0008] In order to facilitate the drainage of oil that falls onto the second plate, the first plate is set vertically, and the second plate is set at an angle downward from front to back.

[0009] More preferably, the tilt angle of the second plate relative to the horizontal plane is in the range of 0° to 10°.

[0010] Further preferably, the second plate has a recessed oil collection groove in the middle. The recessed oil collection groove improves the oil collection effect.

[0011] Further preferably, a fan is installed inside the upper housing, positioned above the second plate. The lower housing can move up and down relative to the upper housing. When the lower housing is at its highest position, the bottom of the fan is placed in the oil collection trough. This oil collection trough, on the one hand, prevents interference with the volute when the entire unit is retracted, reducing the overall height of the unit, improving installation adaptability and convenience, and saving manufacturing costs; on the other hand, the recessed oil collection trough acts as an oil collection chamber, orderly and centrally draining the oil from the fan downwards, preventing disordered oil discharge from the fan, and improving the cleanliness and oil drainage efficiency of the entire unit.

[0012] Further preferably, a lower front plate is installed on the rear side of the second plate, the lower front plate being vertically arranged, and the air inlet body being able to move up and down along the lower front plate. Thus, a wider upper air inlet channel is formed between the upper front plate and the rear plate of the lower housing, and a narrower lower air inlet channel is formed between the lower front plate and the rear plate of the lower housing. After the fumes enter from the air inlet body, they pass through the lower and upper air inlet channels in sequence before being drawn into the fan. Due to the narrower front-to-back width of the lower air inlet channel, the fumes flow velocity is faster, which can drive the external flow field to achieve faster airflow, giving the fumes a greater backward velocity in the same amount of time, preventing the fumes from escaping. The upper air inlet channel can construct a highly efficient pressure stabilizing chamber, allowing the airflow to be buffered and stabilized within the pressure stabilizing chamber, thereby improving the fume extraction effect.

[0013] In order to allow the oil on the lower front plate to flow smoothly into the oil cup, the bottom of the lower front plate has a downward folded edge that bends backward, and the projection of the rear edge of the downward folded edge in the vertical direction falls into the oil cup.

[0014] The second oil guiding channel can have various structures. Preferably, the second oil guiding channel includes a grid plate, which is inclined downwards from front to back and has an oil guiding surface. The vertical projection of the rear edge of the second plate falls onto the oil guiding surface. In this way, the oil flowing out of the first oil guiding channel can smoothly enter the second oil guiding channel.

[0015] Preferably, the rear edge of the second plate extends downwards and backwards with an oil-guiding flange, the projection of the rear edge of the oil-guiding flange in the vertical direction falling onto the oil-guiding surface. This allows oil from the second plate to drip smoothly onto the grid plate.

[0016] To prevent oil from flowing along the edges when the range hood is suspended and tilted to the left or right, the rear edge of the oil-guiding fold has spaced oil leakage notches.

[0017] Further preferably, a lower front plate is installed on the rear side of the second plate. The lower front plate is vertically arranged, and the grille is located on the rear side of the lower front plate. When the air inlet moves upward relative to the lower housing, the grille moves from the lower part of the lower front plate to the upper part of the lower front plate. In this way, during the lifting and lowering process of the air inlet, the grille can cooperate with the lower front plate to form a line seal between the grille and the lower front plate, reducing the probability of oil fume leakage.

[0018] To further prevent pressure loss and ensure effective fume extraction, the air inlet has a smoke inlet. An upper guide plate is installed at the bottom front side of the grille, vertically positioned above the smoke inlet. The bottom of the lower front plate has a downward-bent edge, and the top of the upper guide plate has an upward-bent edge. The lower and upper edges have opposing surfaces. When the lower housing is at its lowest position, the lower and upper edges abut or approach each other, forming a surface seal between the upper guide plate and the lower front plate. In this way, the lower edge of the lower front plate, in conjunction with the upper edge of the upper guide plate, further reduces the probability of airflow pressure loss through the small gap between the front sealing strip and the vertical plane of the lower front plate during the descent of the air inlet.

[0019] Further preferably, the air inlet has a smoke inlet, and an upper guide plate is installed at the bottom front side of the grille. The upper guide plate is vertically positioned above the smoke inlet. A front sealing strip is installed on the front side of the grille, and the front sealing strip is clamped between the grille and the upper guide plate. The leading edge of the front sealing strip is close to the rear side of the lower front plate, that is, the distance between the leading edge of the front sealing strip and the rear side of the lower front plate is within the range of 0-10mm. In this way, during the raising and lowering of the air inlet, a certain degree of sealing structure is formed between the front sealing strip and the lower front plate to prevent pressure leakage. Moreover, when the leading edge of the front sealing strip contacts the rear side of the lower front plate, the front sealing strip on the grille can scrape off the condensed oil on the rear side of the lower front plate.

[0020] To prevent interference between the grille and the second plate of the upper front plate when not in operation, the second plate has a recessed oil collection groove in the middle, and the front side of the grille has an upwardly folded flange with a clearance notch in the middle to avoid the oil collection groove.

[0021] To enhance the oil guiding function of the grating plate, it features spaced-apart oil guiding channels, with the width of the channels in the central area being greater than the width of those on the left and right sides. This allows the central channel to effectively collect the oil flowing from the oil collection tank.

[0022] In order for the oil on the grating plate to flow smoothly into the oil cup, an oil leakage hole is opened at the lowest position of the rear part of the grating plate, and the vertical projection of the oil leakage hole falls into the oil cup.

[0023] Preferably, the lower housing moves up and down relative to the upper housing under the drive of the drive mechanism, and the air inlet moves up and down relative to the lower housing under the drive of the drive mechanism.

[0024] Compared with the prior art, the advantages of the present invention are as follows: the lifting range hood includes a lower box body disposed on the upper box body, an air inlet body disposed on the lower box body and capable of lifting relative to the lower box body, the lower box body having a first oil guiding channel, the vertical projection of the front side of the upper box body falling into the first oil guiding channel, and the air inlet body having a second oil guiding channel connected to the oil passage of the first oil guiding channel. Thus, the oil in the upper box body can sequentially enter the oil cup at the bottom of the air inlet body through the first oil guiding channel and the second oil guiding channel, effectively solving the oil passage problem of the lifting range hood and preventing the oil in the upper box body from dripping directly onto the stove. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention (lower housing in raised state);

[0026] Figure 2 for Figure 1 The diagram shown is a schematic of the internal structure of the range hood.

[0027] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the range hood.

[0028] Figure 4 for Figure 3 An enlarged schematic diagram of part A in the middle;

[0029] Figure 5 This is a schematic diagram of the upper front panel of a range hood according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the grating plate according to an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the structure of a range hood according to an embodiment of the present invention (lower housing in a lowered state);

[0032] Figure 8 for Figure 7 A schematic diagram of the internal structure of the range hood;

[0033] Figure 9 for Figure 7 The diagram shows a cross-sectional view of the range hood.

[0034] Figure 10 for Figure 9 Enlarged diagram of part B. Detailed Implementation

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0036] like Figures 1 to 4As 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 5 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 3 The direction indicated by the middle arrow C is rearward. The air inlet 3 is located 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, or they can move independently under the drive of independent drive mechanisms.

[0037] The lower housing 2 has a first oil guide channel. The projection of the front side of the upper housing 1 in the vertical direction falls into the first oil guide channel. The air inlet 3 has a second oil guide channel that is connected to the oil passage of the first oil guide channel. Thus, the oil in the upper housing 1 and the fan 5 can enter the oil cup 4 in sequence through the first oil guide channel and the second oil guide channel.

[0038] like Figure 5 As shown, the first oil guiding channel in this embodiment includes an L-shaped upper front plate 6, which is fixed inside the lower housing 2. The upper front plate 6 includes a vertically arranged first plate 61 and a second plate 62 that bends backward from the lower edge of the first plate 61. The second plate 62 is inclined downward from front to back, and the inclination angle of the second plate 62 relative to the horizontal plane ranges from 0° to 10°, that is, the included angle between the first plate 61 and the second plate 62 ranges from 90° to 100°, preferably 92°. Furthermore, the middle part of the second plate 62 has a recessed oil collecting groove 621, and the included angle between the bottom surface of the oil collecting groove 621 and the bottom surface of the second plate 62 outside the oil collecting groove 621 ranges from -2° to 2°. The fan 5 is located above the second plate 2, and when the lower housing 2 is raised to its highest position, the bottom of the fan 5 is placed in the oil collecting groove 621. On the one hand, the oil collection trough 621 can avoid interference with the fan 5 after the whole machine is folded up, reduce the height of the whole machine, improve installation adaptability and convenience, and save manufacturing costs; on the other hand, the recessed oil collection trough is equivalent to an oil collection chamber, which orderly and centrally discharges the oil from the fan 5 downwards, avoiding disorderly discharge of the main oil in the range hood, and improving the cleanliness and oil discharge efficiency of the whole machine.

[0039] The first plate 61 of the upper front plate 6 is close to the front wall of the lower housing 2 and cooperates with the front plate of the upper housing 1 to achieve a motion seal. The second plate 62 is located in the middle area of ​​the lower housing 2 in the height direction, and the left and right sides of the second plate 62 are connected to the corresponding side mounting plates of the lower housing 2. The second plate 62 is used to receive the oil falling from inside the upper housing 2 and the fan 5. Since the second plate 62 is inclined from front to back relative to the horizontal plane, the oil falling into the second plate 62 can be discharged backward.

[0040] like Figure 6 As shown, the second oil guiding channel in this embodiment includes a grille plate 7, which is installed on the air inlet body 3 and rises and falls synchronously with the air inlet body 3. The grille plate 7 is inclined downward from front to back, and has an oil guiding surface 70. The vertical projection of the rear edge of the second plate body 62 falls on the oil guiding surface 70. Furthermore, the rear edge of the second plate body 62 has spaced oil leakage notches 623. The purpose of setting the oil leakage notches 623 is to prevent oil from flowing along the edge when the range hood is suspended and tilted left and right.

[0041] The main body of the grille plate 7 has spaced oil guiding channels 73. The oil guiding channels 73 are located on the rear side of the oil guiding surface 70 and are interconnected, meaning that the oil on the oil guiding surface 70 can flow into the oil guiding channels 73. In this embodiment, each oil guiding channel 73 has two oil leakage holes 74 on the left and right sides of its lowest point. The vertical projection of the oil leakage holes 74 falls into the oil cup 4, and the oil in the oil guiding channel 73 eventually drips into the oil cup 4 through the oil leakage holes 74, reducing the risk of oil overflow. Since the grille plate 7 extends obliquely downward from front to back, the oil is guided to the rear of the air inlet 3 before dripping, reducing the user's visibility of the oil. In addition, the oil guiding channels 73 have upwardly bent flanges 731 on both sides, which on the one hand gather the oil to prevent disorderly flow, and on the other hand improve the structural strength. Taking into account both ventilation area and oil discharge efficiency, the width of the oil guide channel 73 in the middle area of ​​this embodiment is greater than the width of the oil guide channels 73 on the left and right sides of the grille plate 7. The oil guide channel 73 in the middle area corresponds to the oil collection groove 621 of the second plate 62. Since the oil collection groove 621 is equivalent to an oil collection chamber, it receives a large amount of oil. The oil flowing out of the oil collection groove 621 enters the oil cup 4 through the wider oil guide channel 73, which can improve the oil discharge efficiency and prevent oil overflow from the oil guide channel 73.

[0042] A lower front plate 9 is installed on the rear side of the second plate 62. The top of the lower front plate 9 is fixed to the rear side of the upper front plate 62, and the lower front plate 9 is vertically set. The air inlet 3 can move up and down along the lower front plate 9. A relatively wide upper air inlet channel is formed between the upper front plate 9 and the rear plate of the lower box 2, and a relatively narrow lower air inlet channel is formed between the lower front plate 9 and the rear plate of the lower box. After the oil fumes enter from the air inlet 3, they are sucked into the fan 5 after passing through the lower air inlet channel and the upper air inlet channel in sequence. Because the lower air inlet channel is narrow in width, the oil fume flow rate is fast, which can drive the external flow field to achieve faster airflow. In the same amount of time, the oil fume is given a greater backward velocity, which prevents the oil fume from escaping. The upper air inlet channel can construct an efficient pressure stabilizing chamber, so that the airflow is buffered and stabilized in the pressure stabilizing chamber, which is conducive to improving the oil fume absorption effect.

[0043] In this embodiment, the grille 7 is located on the rear side of the lower front panel 9. When the air inlet 3 moves upward relative to the lower housing 2, the grille 7 moves from the lower part of the lower front panel 9 to the upper part of the lower front panel 9. Thus, during the lifting and lowering process of the air inlet 3, the grille 7 can cooperate with the lower front panel 9 to form a line seal between the grille 7 and the lower front panel 9, reducing the probability of oil fume leakage.

[0044] The rear edge of the second plate 62 has an oil-guiding flange 622 that extends rearward from the lower front plate 9. The oil-guiding flange 622 extends rearward and downward, and the projection of the rear edge of the oil-guiding flange 622 in the vertical direction falls on the oil-guiding surface 70 of the grille plate 7. An oil leakage notch 623 is provided on the oil-guiding flange 622. In order to avoid the oil collection groove 621 of the second plate 62, the front side of the grille plate 7 has an upwardly folded flange 71, and a clearance notch 72 for avoiding the oil collection groove 621 is provided in the middle of the flange 71.

[0045] In this embodiment, the air inlet 3 has a smoke inlet 31, and an upper guide plate 10 is installed at the bottom front side of the grille plate 7. The upper guide plate 10 is vertically arranged above the smoke inlet 31. The upper guide plate 10 can reduce the height of the smoke inlet 31, so that the oil fumes are sucked in when there is still a certain distance between them and the lower box 2. On the one hand, it can reduce the condensation of oil on the surface of the lower box 2, and on the other hand, it can reduce the leakage of oil fumes.

[0046] In this embodiment, a front sealing strip 8 is installed on the front side of the grille plate 7, with the leading edge of the front sealing strip 8 close to the rear side of the lower front plate 9. The front sealing strip 8 is a rubber seal and is clamped between the grille plate 7 and the upper guide plate 10. After the front sealing strip 8 is installed, a certain degree of sealing structure is formed between the front sealing strip 8 and the lower front plate 9 during the descent of the air intake body 3, that is, a motion seal is achieved. This is a line seal, thereby preventing oil fume leakage and preventing pressure relief. To further improve the pressure relief effect, the bottom of the lower front plate 9 has a downwardly bent lower edge 91, which also forms a certain degree of sealing structure with the upper guide plate 10. This is a line seal. Additionally, see... Figure 10 As shown, the top of the upper guide plate 10 has an upper folded edge 101 that bends forward and upward. The opposite surfaces of the lower folded edge 91 and the upper folded edge 101 can be parallel or approximately parallel to each other. When the lower housing 2 is in its lowest position, the opposite surfaces of the lower folded edge 91 and the upper folded edge 101 abut or approach each other, forming a surface seal between the upper guide plate 10 and the lower front plate 9. At this time, the two line seals mentioned above become surface seals, resulting in a better sealing effect and better preventing pressure leakage, thus ensuring the oil fume extraction effect. In addition, the projection of the rear edge of the lower folded edge 91 in the vertical direction falls into the oil cup 4, thereby allowing the oil on the lower folded edge 91 to smoothly enter the oil cup 4.

[0047] In addition, the bottom of the upper guide plate 10 is bent backward to form an oil guide groove 102. After setting the oil guide groove 102, on the one hand, the oil receiving area of ​​the upper guide plate 10 can be increased to ensure that more dripping oil can be received and to avoid excessive airflow resistance. On the other hand, the oil in the oil guide groove 102 can be guided to drip down to the left and right sides, reducing the amount of oil dripping that users can see directly.

[0048] When the range hood is not in use, Figures 1 to 4 As shown, when the lower housing 2 rises to its highest position, the air intake 3 rises to its highest position simultaneously and is hidden inside the lower housing 2. The bottom surface of the oil cup 4 is flush with the bottom surface of the lower housing 2. The range hood has a very compact structure and can be completely hidden in the cabinet.

[0049] When the range hood is working, such as Figures 7 to 10 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 31 of the air inlet 3 is exposed, and the negative pressure zone descends to improve the smoke extraction effect. Furthermore, the descent stroke of the lower housing 2 and the air inlet 3 can be intelligently controlled under different operating conditions.

[0050] 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 the air inlet (3) is disposed on the lower housing (2) and is capable of lifting relative to the lower housing (2), and an oil cup (4) is installed at the bottom of the air inlet (3), characterized in that: The lower housing (2) has a first oil guiding channel. The vertical projection of the front side of the upper housing (1) falls into the first oil guiding channel. The air inlet (3) has a second oil guiding channel that is connected to the oil passage of the first oil guiding channel. The oil in the upper housing (1) can enter the oil cup (4) in sequence through the first oil guiding channel and the second oil guiding channel. The first oil guiding channel includes an upper front plate (6) with an L-shaped structure. The upper front plate (6) is fixed inside the lower housing (2). The upper front plate (6) has a vertically arranged first... The first plate (61) and the second plate (62) bend backward from the lower edge of the first plate (61). The second oil channel includes a grid plate (7). The grid plate (7) is inclined downward from front to back. The grid plate (7) has an oil guiding surface (70). The vertical projection of the rear edge of the second plate (62) falls on the oil guiding surface (70). The lower box (2) moves up and down relative to the upper box (1) under the drive of the drive mechanism. The air inlet (3) moves up and down relative to the lower box (2) under the drive of the drive mechanism.

2. The lifting range hood according to claim 1, characterized in that: The first plate (61) is close to the front wall of the lower box (2), and the second plate (62) is located in the middle region of the lower box (2) in the height direction.

3. The lifting range hood according to claim 1, characterized in that: A fan (5) is installed inside the upper housing (1), and the fan (5) is located above the second plate (62).

4. The lifting range hood according to claim 1, characterized in that: The second plate (62) has a recessed oil collection groove (621) in the middle.

5. The lifting range hood according to claim 4, characterized in that: A fan (5) is installed inside the upper housing (1). The fan (5) is located above the second plate (62). The lower housing (2) can move up and down relative to the upper housing (1). When the lower housing (2) is raised to the highest position, the bottom of the fan (5) is placed in the oil collection tank (621).

6. The lifting range hood according to claim 1, characterized in that: A lower front plate (9) is installed below the rear side of the second plate (62). The lower front plate (9) is vertically arranged, and the air inlet (3) can move up and down along the lower front plate (9).

7. The lifting range hood according to claim 6, characterized in that: The bottom of the lower front plate (9) has a lower folded edge (91) that bends backward and downward, and the projection of the rear edge of the lower folded edge (91) in the vertical direction falls into the oil cup (4).

8. The lifting range hood according to claim 1, characterized in that: The rear edge of the second plate (62) extends downward and backward with an oil-guiding fold (622), and the projection of the rear edge of the oil-guiding fold (622) in the vertical direction falls on the oil-guiding surface (70).

9. The lifting range hood according to claim 8, characterized in that: The rear edge of the oil-guiding flange (622) has spaced oil leakage notches (623).

10. The lifting range hood according to claim 1, characterized in that: A lower front plate (9) is installed on the rear side of the second plate (62). The lower front plate (9) is vertically arranged, and the grille (7) is located on the rear side of the lower front plate (9). When the air inlet (3) moves upward relative to the lower box (2), the grille (7) moves from the lower part of the lower front plate (9) to the upper part of the lower front plate (9).

11. The lifting range hood according to claim 10, characterized in that: The air inlet (3) has a smoke inlet (31). An upper guide plate (10) is installed at the bottom front side of the grille (7). The upper guide plate (10) is vertically arranged above the smoke inlet (31). The bottom of the lower front plate (9) has a lower folded edge (91) that bends backward and downward. The top of the upper guide plate (10) has an upper folded edge (101) that bends forward and upward. The lower folded edge (91) and the upper folded edge (101) have opposing surfaces. When the lower box (2) is in the lowest position, the opposing surfaces of the lower folded edge (91) and the upper folded edge (101) abut or approach each other to form a surface seal between the upper guide plate (10) and the lower front plate (9).

12. The lifting range hood according to claim 10, characterized in that: The air inlet (3) has a smoke inlet (31). An upper guide plate (10) is installed at the bottom front side of the grille (7). The upper guide plate (10) is vertically arranged above the smoke inlet (31). A front sealing strip (8) is installed on the front side of the grille (7). The front sealing strip (8) is clamped between the grille (7) and the upper guide plate (10), and the front edge of the front sealing strip (8) is close to the rear side of the lower front plate (9).

13. The lifting range hood according to claim 1, characterized in that: The second plate (62) has a recessed oil collection groove (621) in the middle, and the front side of the grid plate (7) has an upwardly folded flange (71), and the flange (71) has a clearance notch (72) in the middle position to avoid the oil collection groove (621).

14. The lifting range hood according to claim 1, characterized in that: The second plate (62) has a recessed oil collection groove (621), and the grid plate (7) has spaced oil guiding channels (73), and the width of the oil guiding channel (73) in the middle area is greater than the width of the oil guiding channels (73) in the left and right sides of the grid plate (7), and the oil guiding channel (73) in the middle area corresponds to the oil collection groove (621).

15. The lifting range hood according to claim 1, characterized in that: An oil drain hole (74) is provided at the lowest position of the rear part of the grating plate (7), and the projection of the oil drain hole (74) in the vertical direction falls into the oil cup (4).

Images