CN117128553A - Lifting type range hood - Google Patents

Abstract

The utility model provides a lifting type range hood, including last box, lower box and air inlet body, the lower box is located on the last box, and the air inlet body is located on the lower box and can do elevating movement relatively the lower box, and the oil cup is installed to the bottom of air inlet body, and the lower box has first oil guide passageway, goes up box leading flank in the projection of vertical orientation and falls into in the first oil guide passageway, and the air inlet body has the second oil guide passageway with first oil guide passageway oil circuit intercommunication, and the fluid in the last box can pass through first oil guide passageway and second oil guide passageway in proper order and get into in the oil cup. The utility model has the following advantages: this over-and-under type range hood is located the oil in the last box and can get into the oil cup of air inlet body bottom through first oily passageway and the oily passageway of second in proper order, and the oil circuit structure is comparatively simple, has effectively solved the oil circuit problem of over-and-under type range hood, avoids the direct whereabouts of oil in the last box to the top of a kitchen range.

Description

Lifting type range hood

Technical Field

The utility model relates to the technical field of range hoods, in particular to a lifting range hood.

Background

The range hood has become one of the indispensable kitchen appliances in modern families. The range hood works by utilizing the fluid dynamics principle, a range hood fan is usually arranged in the shell, the range hood fan is used for exhausting the oil smoke, and a filter screen is used for filtering part of grease particles. After the range hood works for a long time, oil can be generated in the range hood, and after the oil is accumulated in the range hood, the oil suction effect and the service life of the range hood can be influenced, so that an oil way in the range hood is required to be designed, and the oil can flow into an oil cup in time. As disclosed in chinese patent publication No. 202010294463.9 (grant publication No. CN 1111425902B), the oil guiding structure of the range hood includes a first oil guiding groove assembly for collecting condensed oil of the second air inlet box and the blower, and a second oil guiding groove assembly for guiding the condensed oil collected in the first oil guiding groove assembly into the oil cup, the first oil guiding groove assembly being disposed at the lower inner periphery of the second air inlet box. This range hood is over-and-under type range hood, can realize the negative pressure district and move down through the decline of first air inlet box body, promote the oil smoke effect to, still through setting up the oil guide structure, realize the transfer of fixed part condensate oil to the mobile part of range hood, and have the advantage such as reduce the jam risk, the pollution face is little, but have the oil in the last box can follow the risk that lower box overflowed. As another example, in "a range hood" disclosed in chinese patent No. 202221698878.3 (issued to CN 217876026U) and "a hidden range hood" disclosed in chinese patent No. 201821783223.X (issued to CN 209355322U), the negative pressure area is moved down by the lowering of the air intake body, so as to improve the effect of exhausting the oil, but the problem of the oil path faced by the lifting range hood is not solved. In view of the above, there is a need for further improvements in existing lifting range hoods.

Disclosure of Invention

The utility model aims to solve the technical problem of providing the lifting type range hood which is provided with a secondary lifting structure and is characterized in that oil in an upper box body can be guided into an oil cup through a lower box body and an air inlet body in sequence.

The technical scheme adopted for solving the technical problems is as follows: this over-and-under type range hood is including last box, lower box and air inlet body, down the box locate on the last box, the air inlet body is located down on the box and can do elevating movement down the box relatively, the oil cup is installed to the bottom of air inlet body, its characterized in that: the lower box body is provided with a first oil guide channel, the projection of the front side surface 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 communicated with an oil way of the first oil guide channel, and oil in the upper box body can sequentially enter the oil cup through the first oil guide channel and the second oil guide channel.

The first oil guide channel can have various structures, preferably, the first oil guide channel comprises an upper front plate with an L-shaped structure, the upper front plate is fixed inside the lower box body, and the upper front plate is provided with a first plate body vertically arranged and a second plate body bent backwards from the lower edge of the first plate body.

Further preferably, the first plate is close to the front wall of the lower case, and the second plate is provided in a middle region in the height direction of the lower case.

In order to enable the first oil guide channel to be capable of receiving oil dropped by the fan, the fan is arranged in the upper box body, and the fan is arranged above the second plate body.

In order to lead out the oil which falls onto the second plate body smoothly, the first plate body is arranged vertically, and the second plate body is obliquely arranged downwards from front to back.

Further preferably, the second plate has an inclination angle with respect to the horizontal plane in the range of 0 ° to 10 °.

Further preferably, the middle part of the second plate body is provided with a concave oil collecting groove. The oil collecting tank is concave, so that the oil collecting effect is better.

Further preferably, a fan is installed in the upper box body, the fan is arranged above the second plate body, the lower box body can do lifting motion relative to the upper box body, and the bottom of the fan is placed in the oil collecting groove under the state that the lower box body rises to the highest position. Therefore, the oil collecting groove can avoid the interference between the whole machine and the volute after being folded, reduce the height of the whole machine, improve the adaptability of installation, facilitate and save the manufacturing cost; on the other hand, the oil collecting groove which is concave is equivalent to an oil collecting cavity, so that the oil of the fan is orderly and intensively led out downwards, unordered oil in the fan is prevented from being led out, and the cleanliness and the oil discharging efficiency in the whole machine are improved.

Further preferably, a lower front plate is mounted on the rear side of the second plate body, the lower front plate is vertically arranged, and the air inlet body can do lifting motion along the lower front plate. From this, form the upper air inlet passageway of broad between the back plate of upper front bezel and lower box, form narrower lower air inlet passageway between the back plate of lower front bezel and lower box, the oil smoke gets into the back from the air inlet body, is inhaled inside the fan after passing through lower air inlet passageway and upper air inlet passageway in proper order, because lower air inlet passageway's front and back width is narrower, the oil smoke velocity of flow is fast, can drive outflow field realization pulling air current more fast, give the bigger backward velocity of oil smoke in the same time, avoid the oil smoke to escape outward, go up the air inlet passageway and can construct efficient steady voltage chamber for the air current is at steady voltage intracavity buffering steady voltage, and then do benefit to the promotion oil smoke absorbing effect.

In order to enable oil on the lower front plate to smoothly flow into the oil cup, the bottom of the lower front plate is provided with a lower folded edge which is bent back and downward, and the projection of the rear edge of the lower folded edge in the vertical direction falls into the oil cup.

The second oil guiding channel can have various structures, preferably, the second oil guiding channel comprises a grating plate, the grating plate is obliquely arranged from front to back and obliquely downwards, the grating plate is provided with an oil guiding surface, and the vertical projection of the rear edge of the second plate body falls onto the oil guiding surface. Thus, the oil flowing out of the first oil guide channel can smoothly enter the second oil guide channel.

Further preferably, the rear edge of the second plate body extends backward and downward to form an oil guiding folded edge, and a projection of the rear edge of the oil guiding folded edge in the vertical direction falls onto the oil guiding surface. Thus, the oil from the second plate body can smoothly drop onto the grating plate.

In order to prevent the phenomenon that oil flows along the edge under the condition that the range hood is hung to incline left and right, oil leakage gaps which are distributed at intervals are formed in the rear edge of the oil guide folded edge.

Further preferably, a lower front plate is mounted on the rear side of the second plate body, the lower front plate is vertically arranged, the grid plate is arranged on the rear side of the lower front plate, and when the air inlet body moves upward relative to the lower box body, the grid plate moves from the lower part of the lower front plate to the upper part of the lower front plate. Therefore, the air inlet body can be matched with the lower front plate in the lifting process, and linear sealing can be formed between the grid plate and the lower front plate, so that the oil smoke leakage probability is reduced.

In order to further prevent the pressure release, guarantee the oil smoke absorbing effect, the air inlet body has a smoke inlet the front side bottom of grid board is installed and is gone up the guide plate, go up the vertical setting of guide plate and be in the top of smoke inlet, the bottom of lower front bezel has the lower hem of bending backward below, the top of going up the guide plate has the upper hem of bending forward above, lower hem has opposite face with last hem, under the state of lower box decline minimum position, lower hem offsets or is close to and forms face seal with last hem between last guide plate and the lower front bezel. Like this, the lower hem of lower front bezel cooperates the last hem of guide plate, and the air inlet body has further reduced the probability that the air current was released in the small clearance of front seal strip and lower front bezel vertical plane in the decline in-process.

Further preferably, the air inlet body is provided with a smoke inlet, the bottom of the front side of the grating plate is provided with an upper guide plate, the upper guide plate is vertically arranged above the smoke inlet, the front side part of the grating plate is provided with a front sealing strip, the front sealing strip is clamped between the grating plate and the upper guide plate, and the front edge of the front sealing strip is close to the rear side surface of the lower front plate, namely, the distance between the front edge of the front sealing strip and the rear side surface of the lower front plate is in the range of 0-10 mm. Like this, at the air inlet body lift in-process, form the seal structure of certain degree between front sealing strip and the lower front bezel, prevent the pressure release, and when the front edge of front sealing strip contacted the trailing flank of lower front bezel, the condensation oil on the front bezel trailing flank down can be scraped to the front sealing strip on the grid board.

In order to avoid interference between the grating plate and the second plate body of the upper front plate in a non-working state, a concave oil collecting groove is formed in the middle of the second plate body, a turned-over edge which is turned upwards is formed in the front side of the grating plate, and a yielding gap for avoiding the oil collecting groove is formed in the middle of the turned-over edge.

In order to make the grating plate play a better role in guiding oil, the grating plate is provided with oil guiding channels which are arranged at intervals, and the width of the oil guiding channels in the middle area is larger than that of the oil guiding channels in the left and right side areas of the grating plate. Thus, the oil guide channel in the middle area can smoothly receive oil from the oil collecting tank.

In order to smoothly guide oil on the grating plate into the oil cup, an oil leakage hole is formed in the lowest position of the rear part of the grating plate, and the projection of the oil leakage hole in the vertical direction falls into the oil cup.

Preferably, the lower box body is driven by the driving mechanism to move up and down relative to the upper box body, and the air inlet body is driven by the driving mechanism to move up and down relative to the lower box body.

Compared with the prior art, the utility model has the advantages that: the lower box that this lift range hood includes is located on the last box, and the air inlet body is located on the lower box and can make elevating movement relatively lower box, and lower box has first oil guide channel, and the upper box leading flank falls into in the first oil guide channel in the ascending projection of vertical direction, and the air inlet body has the second oil guide channel with first oil guide channel oil circuit intercommunication, from this, the fluid in the upper box can get into in the oil cup of air inlet body bottom through first oil guide channel and second oil guide channel in proper order, has effectively solved the oil circuit problem of lift range hood, avoids the direct whereabouts of fluid in the upper box to the top of a kitchen range.

Drawings

Fig. 1 is a schematic structural view of a range hood (lower case raised state) according to an embodiment of the present utility model;

fig. 2 is a schematic view of an internal structure of the range hood shown in fig. 1;

fig. 3 is a structural cross-sectional view of the range hood shown in fig. 1;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

fig. 5 is a schematic structural view of an upper front plate of a range hood according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a grid plate according to an embodiment of the present utility model;

fig. 7 is a schematic view of a structure of a range hood (lower case descending state) according to an embodiment of the present utility model;

fig. 8 is a schematic view illustrating an internal structure of the range hood of fig. 7;

fig. 9 is a structural cross-sectional view of the range hood of fig. 7;

fig. 10 is an enlarged schematic view of a portion B in fig. 9.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 4, the lifting range hood of the present embodiment includes an upper case 1, a lower case 2, and an air intake body 3. The upper box 1 is internally provided with a fan 5, the lower box 2 is arranged on the upper box 1 and can do lifting motion relative to the upper box 1, and the lower box 2 is wrapped outside the upper box 1. The direction indicated by arrow C in figure 3 is taken as the backward direction, the air inlet body 3 is arranged at the rear part of the lower box body 2 and can move up and down relative to the lower box body 2, and the bottom of the air inlet body 3 is provided with an oil cup 4. The lower box body 2 and the air inlet body 3 can synchronously move under the drive of a set of driving mechanism, and can independently move under the drive of independent driving mechanisms.

The lower box body 2 is provided with a first oil guide channel, the projection of the front side surface of the upper box body 1 in the vertical direction falls into the first oil guide channel, the air inlet body 3 is provided with a second oil guide channel communicated with an oil way of the first oil guide channel, and therefore oil liquid of the upper box body 1 and the fan 5 can sequentially enter the oil cup 4 through the first oil guide channel and the second oil guide channel.

As shown in fig. 5, the first oil guide channel of the present embodiment includes an upper front plate 6 having an L-shaped structure, and the upper front plate 6 is fixed inside the lower case 2. The upper front plate 6 comprises a first plate body 61 vertically arranged and a second plate body 62 bent backwards from the lower edge of the first plate body 61, the second plate body 62 is obliquely arranged downwards from front to back, the inclination angle of the second plate body 62 relative to the horizontal plane ranges from 0 degrees to 10 degrees, namely the included angle between the first plate body 61 and the second plate body 62 ranges from 90 degrees to 100 degrees, and is preferably 92 degrees. The second plate 62 has a recessed oil collecting groove 621 in the middle, and the angle between the bottom surface of the oil collecting groove 621 and the bottom surface of the second plate 62 at the outer part of the oil collecting groove 621 is-2 DEG to 2 deg. The fan 5 is located above the second plate 2, and in a state where the lower casing 2 is raised to the highest position, the bottom of the fan 5 is placed in the oil sump 621. The oil collecting groove 621 can avoid interference between the collected whole machine and the fan 5, so that the height of the whole machine is reduced, the installation suitability is improved, the convenience is improved, and the manufacturing cost is saved; on the other hand, the oil collecting groove which is concave is equivalent to an oil collecting cavity, so that the oil of the fan 5 is orderly and intensively led out downwards, the unordered guiding out of the main oil in the smoke machine is avoided, and the cleanliness and the oil discharging efficiency in the whole machine are improved.

The first plate 61 of the upper front plate 6 is close to the front wall of the lower box 2 and cooperates with the front plate of the upper box 1 to realize motion sealing, the second plate 62 is arranged in the middle area in the height direction of the lower box 2, and the left and right sides of the second plate 62 are connected with corresponding side mounting plates of the lower box 2. The second plate 62 is used for receiving oil in the upper case 2 and falling down the fan 5. Since the second plate 62 is inclined from front to back with respect to the horizontal plane, the oil falling into the second plate 62 can be guided out backward.

As shown in fig. 6, the second oil guide passage of the present embodiment includes a grating plate 7, and the grating plate 7 is mounted on the air intake body 3 and moves up and down synchronously with the air intake body 3. The grating plate 7 is obliquely arranged downwards from front to back, the grating plate 7 is provided with an oil guide surface 70, the vertical projection of the rear edge of the second plate body 62 falls on the oil guide surface 70, and the rear edge of the second plate body 62 is provided with oil leakage notches 623 which are distributed at intervals, so that the oil leakage notches 623 are arranged to prevent oil from flowing along the edge under the condition that the range hood is hung to be inclined leftwards and rightwards.

The body of the grating plate 7 is provided with oil guide channels 73 which are arranged at intervals, the oil guide channels 73 are arranged at the rear side of the oil guide surface 70 and are communicated with each other in an oil way, namely, oil on the oil guide surface 70 can flow into the oil guide channels 73. In this embodiment, the left and right positions of the lowest point of each oil guide channel 73 are both provided with oil leakage holes 74, the projection of the oil leakage holes 74 in the vertical direction falls into the oil cup 4, and the oil in the oil guide channels 73 finally drops into the oil cup 4 through the oil leakage holes 74, so that the risk of accumulated overflow of the oil is reduced. The grating plate 7 obliquely extends downwards from front to back, so that the oil liquid is guided to the rear part of the air inlet body 3 and then drops down, and the visibility of a user to the oil liquid is reduced. In addition, the two sides of the oil guide channel 73 are provided with upward bent upper flanges 731, so that oil is gathered to prevent the unordered flow of the oil, and the structural strength is improved. In combination with comprehensive consideration of ventilation area and oil guiding efficiency, the width of the oil guiding channel 73 in the middle area is larger than the width of the oil guiding channels 73 in the left and right side areas of the grating plate 7, and the oil guiding channel 73 in the middle area corresponds to the oil collecting groove 621 of the second plate body 62, as the oil collecting groove 621 is equivalent to an oil collecting cavity, more received oil flows out of the oil collecting groove 621, and the oil flows into the oil cup 4 through the wider oil guiding channel 73, so that the oil discharging efficiency can be improved, and the oil overflowing phenomenon caused by the oil guiding channel 73 is avoided.

The lower front plate 9 is installed at the rear side of the second plate body 62, the top of the lower front plate 9 is fixed at the rear side of the upper front plate 62, the lower front plate 9 is vertically arranged, and the air inlet body 3 can do lifting motion along the lower front plate 9. Form the upper air inlet passageway of broad between the back plate of upper front bezel 9 and lower box 2, form the lower air inlet passageway of narrower between the back plate of lower front bezel 9 and lower box, the oil smoke gets into the back from air inlet body 3, is inhaled inside fan 5 after passing through lower air inlet passageway and the upper air inlet passageway in proper order, because the front and back width of lower air inlet passageway is narrower, the oil smoke velocity of flow is fast, can drive outflow field realization pulling air current more fast, give the bigger backward velocity of oil smoke in the same time, avoid the oil smoke to escape outward, go up the air inlet passageway and can build efficient steady voltage chamber for the air current is buffering steady voltage in steady voltage intracavity, and then do benefit to the promotion oil smoke absorbing effect.

In this embodiment, the grating plate 7 is disposed at the rear side of the lower front plate 9, and when the air inlet body 3 moves upward relative to the lower case 2, the grating plate 7 moves from the lower portion of the lower front plate 9 to the upper portion of the lower front plate 9. Therefore, the air inlet body 3 can be matched with the lower front plate 9 in the lifting process, and a linear seal can be formed between the grid plate 7 and the lower front plate 9, so that the oil smoke leakage probability is reduced.

The rear edge of the second plate body 62 has an oil guiding folded edge 622 extending rearward from the lower front plate 9, the oil guiding folded edge 622 extends rearward and downward, the projection of the rear edge of the oil guiding folded edge 622 in the vertical direction falls onto the oil guiding surface 70 of the grating plate 7, and the oil leakage gap 623 is provided on the oil guiding folded edge 622. In order to avoid the oil collecting groove 621 of the second plate body 62, the front side of the grating plate 7 is provided with an upward turned-over flange 71, and a yielding gap 72 for avoiding the oil collecting groove 621 is arranged in the middle of the flange 71.

In this embodiment, the air inlet body 3 has a smoke inlet 31, and an upper baffle 10 is installed at the bottom of the front side of the grating plate 7, and the upper baffle 10 is vertically disposed above the smoke inlet 31, so that the upper baffle 10 can reduce the height of the smoke inlet 31, and the oil smoke is sucked when still having a certain distance from the lower box 2, so that on one hand, the condensed oil on the surface of the lower box 2 can be reduced, and on the other hand, the oil smoke leakage can be reduced.

The front side of the grating plate 7 of this embodiment is mounted with a front sealing strip 8, the front edge of the front sealing strip 8 being close to the rear side of the lower front plate 9. The front sealing strip 8 is a rubber seal, and the front sealing strip 8 is clamped between the grating plate 7 and the upper deflector 10. After the front sealing strip 8 is arranged, the air inlet body 3 forms a sealing structure with a certain degree between the front sealing strip 8 and the lower front plate 9 in the descending process, namely, the movement sealing is realized, and the movement sealing is a linear sealing, so that the oil smoke leakage is avoided, and the pressure relief is prevented. In order to further enhance the pressure relief effect, the bottom of the lower front plate 9 is provided with a lower flange 91 bent downward and rearward, and a seal structure, here a wire seal, is formed between the lower flange 91 and the upper baffle 10. In addition, referring to fig. 10, the top of the upper baffle 10 has an upper flange 101 bent forward and upward, the opposite surfaces of the lower flange 91 and the upper flange 101 may be parallel or approximately parallel to each other, and in a state where the lower case 2 descends to the lowest position, the lower flange 91 abuts or approaches the opposite surface of the upper flange 101 to form a surface seal between the upper baffle 10 and the lower front plate 9, at this time, the two line seals become surface seals, so that the sealing effect is better, pressure relief can be better prevented, and the fume absorbing effect is ensured. In addition, the projection of the rear edge of the lower hem 91 in the vertical direction falls into the oil cup 4, whereby the oil on the lower hem 91 can smoothly enter the oil cup 4.

In addition, the bottom of going up guide plate 10 is buckled backward and is formed and lead oil groove 102, sets up behind the oil groove 102, can increase the oil area that connects of going up guide plate 10 on the one hand, guarantees to accept more drip fluid, and can avoid the wind channel resistance too big, on the other hand can lead the fluid in the oil groove 102 to drip to the left and right sides, reduces the fluid drip that the user directly looked to.

In the non-working state of the range hood, as shown in fig. 1 to 4, the lower box body 2 is lifted to the highest position, the air inlet body 3 is lifted to the highest position synchronously and hidden in the lower box body 2, the lower bottom surface of the oil cup 4 is flush with the lower bottom surface of the lower box body 2, and the range hood has a very compact structure and can be completely hidden in a cabinet.

In the operating state of the range hood, as shown in fig. 7 to 10, the lower case 2 is lowered to the lowest position, the air inlet 3 is simultaneously lowered to the lowest position and extends downward from the bottom of the lower case 2, the air inlet 31 of the air inlet 3 is exposed, and the negative pressure area is lowered to improve the effect of absorbing the smoke. And under different working conditions, the descending strokes of the lower box body 2 and the air inlet body 3 can be intelligently controlled.

In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims (18)

1. The utility model provides a lifting type range hood, includes box (1), lower box (2) and air inlet body (3), on box (1) are located to lower box (2), on box (2) and can do elevating movement relative lower box (2) down in air inlet body (3), oil cup (4) are installed to the bottom of air inlet body (3), its characterized in that: the lower box body (2) is provided with a first oil guide channel, the projection of the front side surface of the upper box body (1) in the vertical direction falls into the first oil guide channel, the air inlet body (3) is provided with a second oil guide channel communicated with an oil way of the first oil guide channel, and oil in the upper box body (1) can sequentially pass through the first oil guide channel and the second oil guide channel to enter the oil cup (4).

2. The lifting range hood of claim 1, wherein: the first oil guide channel comprises an upper front plate (6) with an L-shaped structure, the upper front plate (6) is fixed inside the lower box body (2), and the upper front plate (6) is provided with a first plate body (61) which is vertically arranged and a second plate body (62) which is bent backwards from the lower edge of the first plate body (61).

3. The lifting range hood of claim 2, wherein: the first plate body (61) is close to the front wall of the lower box body (2), and the second plate body (62) is arranged in the middle area of the lower box body (2) in the height direction.

4. The lifting range hood of claim 2, wherein: a fan (5) is arranged in the upper box body (1), and the fan (5) is arranged above the second plate body (62).

5. The lifting range hood of claim 2, wherein: the middle part of the second plate body (62) is provided with a concave oil collecting groove (621).

6. The lifting range hood of claim 5, wherein: install fan (5) in last box (1), fan (5) are located the top of second plate body (62), lower box (2) can be for last box (1) elevating movement under the state that lower box (2) risees to the highest position, the bottom of fan (5) is arranged in oil sump (621).

7. The lifting range hood of claim 2, wherein: a lower front plate (9) is arranged below the rear side part of the second plate body (62), the lower front plate (9) is vertically arranged, and the air inlet body (3) can do lifting motion along the lower front plate (9).

8. The lifting range hood of claim 7, wherein: the bottom of the lower front plate (9) is provided with a lower folded edge (91) which is bent back 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).

9. The lifting range hood according to any one of claims 2 to 8, wherein: the second oil guide channel comprises a grating plate (7), the grating plate (7) is obliquely arranged from front to back and obliquely downwards, the grating plate (7) is provided with an oil guide surface (70), and the vertical projection of the rear edge of the second plate body (62) falls onto the oil guide surface (70).

10. The lifting range hood of claim 9, wherein: the rear edge of the second plate body (62) extends to the rear lower side to form an oil guide folded edge (622), and the projection of the rear edge of the oil guide folded edge (622) in the vertical direction falls into the oil guide surface (70).

11. The lifting range hood of claim 10, wherein: oil leakage notches (623) distributed at intervals are formed in the rear edge of the oil guide folded edge (622).

12. The lifting range hood of claim 9, wherein: the method is characterized in that: the lower front plate (9) is installed at the rear side part of the second plate body (62), the lower front plate (9) is vertically arranged, the grating plate (7) is arranged at the rear side of the lower front plate (9), and when the air inlet body (3) moves upwards relative to the lower box body (2), the grating plate (7) moves from the lower part of the lower front plate (9) to the upper part of the lower front plate (9).

13. The lifting range hood of claim 12, wherein: the air inlet body (3) is provided with a smoke inlet (31), the front side bottom of the grating plate (7) is provided with an upper guide plate (10), the upper guide plate (10) is vertically arranged above the smoke inlet (31), the bottom of the lower front plate (9) is provided with a lower folded edge (91) which is folded back and downwards, the top of the upper guide plate (10) is provided with an upper folded edge (101) which is folded forwards and upwards, the lower folded edge (91) and the upper folded edge (101) are provided with opposite surfaces, and the lower folded edge (91) is abutted against or close to the opposite surfaces of the upper folded edge (101) to form surface sealing between the upper guide plate (10) and the lower front plate (9) under the condition that the lower box body (2) descends to the lowest position.

14. The lifting range hood of claim 12, wherein: the air inlet body (3) is provided with a smoke inlet (31), an upper guide plate (10) is arranged at the bottom of the front side of the grating plate (7), the upper guide plate (10) is vertically arranged above the smoke inlet (31), a front sealing strip (8) is arranged on the front side part of the grating plate (7), the front sealing strip (8) is clamped between the grating plate (7) and the upper guide plate (10), and the front edge of the front sealing strip (8) is close to the rear side surface of the lower front plate (9).

15. The lifting range hood of claim 9, wherein: the middle part of second plate body (62) has concave oil collecting groove (621), the front side of grid board (7) has turn over a turn-ups (71) that turns over upwards, the intermediate position of turn-ups (71) is equipped with and is used for dodging oil collecting groove (621) give way breach (72).

16. The lifting range hood of claim 9, wherein: the second plate body (62) is provided with a concave oil collecting groove (621), the grating plates (7) are provided with oil guide channels (73) which are arranged at intervals, the width of the oil guide channels (73) in the middle area is larger than that of the oil guide channels (73) in the left side area and the right side area of the grating plates (7), and the oil guide channels (73) in the middle area correspond to the oil collecting groove (621).

17. The lifting range hood of claim 9, wherein: an oil leakage hole (74) is formed in the lowest position of the rear portion of the grating plate (7), and the projection of the oil leakage hole (74) in the vertical direction falls into the oil cup (4).

18. The lifting range hood of claim 1, wherein: the lower box body (2) is driven by the driving mechanism to do lifting motion relative to the upper box body (1), and the air inlet body (3) is driven by the driving mechanism to do lifting motion relative to the lower box body (2).