A kitchen hood with lifting function and a method of using the same

Abstract

The present application provides a kind of range hood with lifting function, the exhaust box is installed on the upper end surface of fixed plate, the lower end surface left side of fixed plate is provided with lifting assembly, the air outlet on the smoke suction plate is connected with connecting air head, two electric lifting rods are symmetrically installed on the lower end surface of fixed plate, the push rod of electric lifting rod is movably connected with connecting air head, the present application has the beneficial effects as follows: a connecting screw is movably installed on the lower end of electric telescopic rod, and a lifting push rod capable of freely lifting is arranged in the connecting screw rod, so that the lifting push rod can independently descend or rise, thereby the angle can be adjusted while descending, the size of air inlet two is unchanged by the arrangement of connecting clamping seat, left side sealing plate, right side sealing plate and connecting rotating head, and it is always directly above air inlet one, which will not affect the normal suction of oil smoke.

Description

Technical Field

[0001] This invention belongs to the field of range hood technology, and specifically relates to a range hood with lifting function and its usage method. Background Technology

[0002] Existing range hoods generally have a lifting mechanism, which can adjust the height of the range hood as needed to meet different needs. However, existing range hoods cannot adjust both the height and angle at the same time. Therefore, there is an urgent need for a range hood with lifting function to solve this problem. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a range hood with lifting function to solve the problems mentioned in the background art.

[0004] This invention is achieved through the following technical solution: a range hood with lifting function, comprising a smoke extraction plate, a connecting gas head, a lifting assembly, an exhaust box, an electric lifting rod, and a mounting frame. A fixing plate is welded to the right side surface of the mounting frame. The exhaust box is mounted on the upper surface of the fixing plate. A lifting assembly is disposed on the left side of the lower surface of the fixing plate. The lower end of the lifting assembly is movably connected to the upper surface of the smoke extraction plate. The air outlet on the smoke extraction plate is connected to the connecting gas head, and the upper end of the connecting gas head passes through the fixing plate and connects to the air intake of the exhaust box. Two electric lifting rods are symmetrically mounted on the lower surface of the fixing plate. The push rod of the electric lifting rod is movably connected to the connecting gas head. The connecting gas head includes a connecting bracket, a connecting rotor, a connecting pipe, a left sealing plate, a right sealing plate, and a corrugated pipe. The lifting assembly includes an electric telescopic rod, a rotating bearing, a connecting screw sleeve, a lifting push rod, and a mounting plate.

[0005] Furthermore, two electric telescopic rods are provided. A mounting plate is fixed between the lower ends of the push rods of the two electric telescopic rods. A drive motor is mounted on the mounting plate. The output shaft of the drive motor passes through the mounting plate and is located at the lower end of the mounting plate. A second pulley is mounted on the output shaft of the drive motor. A rotating bearing is provided at the bottom end of the push rod of each electric telescopic rod. The connecting screw sleeve is movably connected to the lower end of the electric telescopic rod through the rotating bearing. A first pulley is provided on the outer surface of the connecting screw sleeve. The first pulley and the second pulley are connected by a connecting belt. A guide rod is fixed at the bottom end of the electric telescopic rod. A guide groove is opened at the top end of the lifting push rod. The lifting push rod is threadedly connected to the connecting screw sleeve, and the guide rod is slidably placed in the guide groove. A limit block is provided on the guide rod to control the lifting and lowering of the electric telescopic rod and the electric lifting rod, so that the smoking plate can rise or fall. The lifting and lowering of the lifting push rod can be controlled independently, so that the smoking plate can be offset at a certain angle.

[0006] Furthermore, two connecting shaft blocks are installed on the rear side of the upper surface of the smoking plate, and a connecting shaft hole is opened on the lower surface of the lifting push rod. The lifting push rod and the connecting shaft blocks are movably connected through the connecting shaft hole and the connecting shaft pin. The guide rod has a square structure, and the guide groove has a square structure. The electric lifting rod and the electric telescopic rod are connected in series and connected to switch one. The drive motor is connected in parallel with the electric telescopic rod and connected to switch two. When the power supply of the electric lifting rod or the electric telescopic rod is turned on, the electric lifting rod and the electric telescopic rod can be raised and lowered synchronously, thereby making the smoking plate rise and fall as a whole, and also enabling the smoking plate to shift downwards individually.

[0007] Furthermore, in the connecting head, a connecting pipe is fixed to the upper end of the outer ring surface of the connecting head, and a corrugated pipe is connected to the connecting pipe. An exhaust port is provided at the upper end of the connecting head. An installation groove is provided on the upper surface of the connecting bracket, and an air inlet is provided on the bottom surface of the connecting bracket. An arc-shaped opening is provided on the lower surface of the connecting head. Sliding grooves are respectively provided on the left and right sides of the inner ring surface of the connecting head. Guide grooves are provided on the sliding grooves, and the uppermost guide groove of each sliding groove penetrates the sliding groove inward to form a connecting groove. Furthermore, a connecting arc is provided at the connection between the guide groove and the top of the sliding groove. A guide slider is fixed on the front and rear sides of the left sealing plate, and a guide slider is fixed on the front and rear sides of the right sealing plate. The left sealing plate is slidably connected to the left side of the sliding groove, and the right sealing plate is slidably connected to the right side of the sliding groove. The bottom distance between the right sealing plate and the left sealing plate forms an air inlet two. The connecting head is slidably installed in the mounting groove. Both the left and right sealing plates are connected to the connecting bracket, and the air inlet two is located directly above the air inlet one.

[0008] Furthermore, the outer ring surface of the connecting card seat is provided with two rotating shafts. The electric lifting rod is movably connected to the connecting air head through the rotating shafts, and the axis of the rotating shaft is on the same straight line as the axis of the connecting rotating head. The arc length of the left sealing plate is greater than the arc length of the right sealing plate, and the top of the right sealing plate and the top of the left sealing plate are both provided with connecting arc surfaces. The curvature of the connecting arc surfaces is consistent with the curvature of the connecting arc. The left sealing plate is in contact with the top of the left connecting groove, and there is a gap between the right sealing plate and the top of the right connecting groove.

[0009] Furthermore, a notch is provided on the lower left side of the outer ring surface of the connecting head, and a notch is provided on the lower right side of the outer ring surface of the connecting head. A protrusion is provided on the left side of the bottom surface of the mounting groove, and a protrusion is provided on the right side of the bottom surface of the mounting groove. The protrusion is placed on the notch and connected to the left sealing plate, and the protrusion is placed on the notch and connected to the right sealing plate. There is a gap between the bottom of the notch and the protrusion. When the connecting bracket rotates with the smoking plate, since the connecting bracket is connected to the left and right sealing plates through the protrusions, it can drive the left and right sealing plates to rotate together, which can ensure that the size of the second air inlet remains unchanged and is always directly above the first air inlet.

[0010] A method for using a range hood with a lifting function, the method of use is as follows:

[0011] S1. When it is necessary to lower the smoke extraction plate, the power supply of switch one is turned on in the positive direction. Since the electric lifting rod and the electric telescopic rod are connected in series, the electric lifting rod will move down synchronously with the electric telescopic rod, thereby causing the smoke extraction plate to move down. During the downward movement, the corrugated pipe is stretched to ensure the normal discharge of oil fumes.

[0012] S2. When it is necessary to tilt the smoke plate, turn on the power of switch two in the forward direction. The drive motor will drive pulley two to rotate. The rotating pulley two will drive the two pulleys one to rotate, thereby causing the connecting screw sleeve to rotate. Since the connecting screw sleeve is connected to the lifting push rod by threads, the lifting push rod will descend, causing the smoke plate to rotate counterclockwise around the axis of rotation. During the rotation, the connecting bracket will rotate together to ensure that the size of the air inlet two remains unchanged and is always directly above the air inlet one.

[0013] After adopting the above technical solution, the beneficial effects of the present invention are as follows: The present invention movably installs a connecting screw sleeve at the lower end of the electric telescopic rod and sets a lifting push rod that can be freely raised and lowered inside the connecting screw rod, thereby forming a new lifting mechanism with the electric telescopic rod and the lifting push rod. During the process of the electric telescopic rod descending or rising, the lifting push rod can descend or rise independently, thereby allowing for angle adjustment while descending. Through the set connecting bracket, left sealing plate, right sealing plate and connecting rotating head, when the smoke extraction plate deflects, the size of the second air inlet can be kept unchanged and always positioned directly above the first air inlet, without affecting the normal inhalation of oil fumes, thus improving the efficiency of oil fume extraction. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional schematic diagram of a range hood with lifting function according to the present invention.

[0016] Figure 2 This is a front view of a range hood with lifting function according to the present invention.

[0017] Figure 3 This is a schematic diagram showing the connection between the air head and the plate of a range hood with lifting function according to the present invention.

[0018] Figure 4 This is a cross-sectional schematic diagram of the gas connection head of a range hood with lifting function according to the present invention.

[0019] Figure 5 This is a schematic cross-section of the connecting rotor of a range hood with lifting function according to the present invention.

[0020] Figure 6 This is an enlarged schematic diagram of point A of a range hood with lifting function according to the present invention.

[0021] Figure 7 This is a front view of the lifting component of a range hood with lifting function according to the present invention.

[0022] Figure 8 This is a schematic diagram showing the connection between the electric telescopic rod and the lifting push rod of a range hood with lifting function according to the present invention.

[0023] In the diagram, 1-smoking plate, 2-connecting air head, 21-connecting bracket, 211-installation groove, 22-connecting rotating head, 221-sliding groove, 222-guide groove, 223-connecting arc, 224-connecting groove, 23-connecting pipe, 24-exhaust port, 25-left side sealing plate, 26-air inlet one, 27-air inlet two, 28-right side sealing plate, 281-guide slider, 282-connecting arc surface, 29-corrugated pipe, 3-exhaust box, 4-mounting bracket, 5-lifting assembly, 51-electric telescopic rod, 511-guide rod, 512-limiting block, 52-rotating bearing, 53-connecting screw sleeve, 531-pulley one, 532-connecting belt, 54-lifting push rod, 55-mounting plate, 551-drive motor, 552-pulley two, 6-electric lifting rod. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 8 This invention provides a technical solution: a range hood with lifting function, including a smoke extraction plate 1, a connecting gas head 2, a lifting assembly 5, an exhaust box 3, an electric lifting rod 6, and a mounting frame 4. A fixing plate is welded to the right side surface of the mounting frame 4. The exhaust box 3 is installed on the upper surface of the fixing plate. The lifting assembly 5 is provided on the left side of the lower surface of the fixing plate. The lower end of the lifting assembly 5 is movably connected to the upper surface of the smoke extraction plate 1. The air outlet on the smoke extraction plate 1 is connected to the connecting gas head 2, and the upper end of the connecting gas head 2 passes through the fixing plate and is connected to the air intake of the exhaust box 3. Two electric lifting rods 6 are symmetrically installed on the lower surface of the fixing plate. The push rod of the electric lifting rod 6 is movably connected to the connecting gas head 2.

[0026] Please see Figure 2 , Figure 7 and Figure 8 In the first embodiment of the present invention, the connecting air head 2 includes a connecting bracket 21, a connecting rotor 22, a connecting pipe 23, a left sealing plate 25, a right sealing plate 28, and a corrugated pipe 29. Two electric telescopic rods 51 are provided. A mounting plate 55 is fixed between the lower ends of the push rods of the two electric telescopic rods 51. A drive motor 551 is mounted on the mounting plate 55. The output shaft of the drive motor 551 passes through the mounting plate 55 and is located at the lower end of the mounting plate 55. A pulley 552 is mounted on the output shaft of the drive motor 551. A rotating bearing 52 is provided at the bottom end of the push rod of each electric telescopic rod 51. The connecting screw sleeve 53 is movably connected through the rotating bearing 52. At the lower end of the electric telescopic rod 51, a pulley 531 is provided on the outer ring surface of the connecting screw sleeve 53. The pulley 531 and the pulley 552 are connected by a connecting belt 532. A guide rod 511 is fixed at the bottom end of the electric telescopic rod 51. A guide groove is provided at the top end of the lifting push rod 54. The lifting push rod 54 is threadedly connected to the connecting screw sleeve 53, and the guide rod 511 is slidably placed in the guide groove. A limit block 512 is provided on the guide rod 511 to control the lifting and lowering of the electric telescopic rod 51 and the electric lifting rod 6, so that the smoking plate 1 can rise or fall. The lifting and lowering of the lifting push rod 54 can be controlled independently, so that the smoking plate 1 can be offset at a certain angle.

[0027] Two connecting shaft blocks are installed on the rear side of the upper surface of the smoking plate 1. The lower surface of the lifting push rod 54 is provided with a connecting shaft hole. The lifting push rod 54 and the connecting shaft blocks are movably connected through the connecting shaft hole and the connecting shaft pin. The guide rod 511 has a square structure and the guide groove has a square structure. The electric lifting rod 6 and the electric telescopic rod 51 are connected in series and connected to switch one. The drive motor 551 is connected in parallel with the electric telescopic rod 51 and connected to switch two. When the power supply of the electric lifting rod 6 or the electric telescopic rod 51 is turned on, the electric lifting rod 6 and the electric telescopic rod 51 can be raised and lowered synchronously, so that the smoking plate 1 is raised and lowered as a whole, and the smoking plate 1 can be offset downwards individually.

[0028] In actual use, when the power is turned on to the electric telescopic rod 51 and the electric lifting rod 6, since the electric lifting rod 6 and the electric telescopic rod 51 are connected in series, the electric telescopic rod 51 and the electric lifting rod 6 will move down simultaneously, causing the smoking plate 1 to descend under the action of the electric telescopic rod 51 and the electric lifting rod 6. At the same time, the mounting plate 55 fixed on the push rods of the two electric telescopic rods 51 will descend along with the drive motor 551 and the second pulley 552. When the power is turned on to the drive motor 551, the drive motor 551 will drive the second pulley 552 to rotate. Because the second pulley 552 is connected to the first pulley 531 through the connecting belt 532, and the connecting sleeve 53 is movably connected to the lower end of the push rod of the electric telescopic rod 51 through the rotating bearing 52, the first pulley 531 can drive the connecting sleeve 53 to rotate. A guide rod 511 is provided at the lower end of the push rod of rod 51, and the guide rod 511 is slidably placed in the guide groove. The rotating connecting sleeve 53 causes the lifting push rod 54 to move down under the action of the thread and the guide rod 511. At this time, the smoke plate 1 will rotate around the axis of rotation, thereby offsetting the smoke plate 1 at a certain angle, so that the smoke plate 1 is at the most suitable angle for smoke extraction. By installing a connecting sleeve 53 at the lower end of the electric telescopic rod 51 and setting a lifting push rod 54 that can be freely raised and lowered in the connecting screw, the electric telescopic rod 51 and the lifting push rod 54 form a new lifting mechanism. During the process of the electric telescopic rod 51 descending or rising, the lifting push rod 54 can descend or rise independently, thereby adjusting the angle while descending, which improves efficiency.

[0029] Please see Figures 2 to 6In the second embodiment of the present invention, in the connecting air head 2, the lifting assembly 5 includes an electric telescopic rod 51, a rotating bearing 52, a connecting screw sleeve 53, a lifting push rod 54, and a mounting plate 55. A connecting pipe 23 is fixed to the upper end of the outer ring surface of the connecting head 22, and a corrugated pipe 29 is connected to the connecting pipe 23. An exhaust port 24 is opened at the upper end of the connecting head 22. An installation groove 211 is opened on the upper surface of the connecting seat 21. An air inlet 26 is opened on the bottom surface of the connecting seat 21. An arc-shaped opening is opened on the lower surface of the connecting head 22. Sliding grooves 221 are opened on the left and right sides of the inner ring surface of the connecting head 22, and guide grooves 222 are opened on the sliding grooves 221. The uppermost guide groove of each sliding groove 221 is... The grooves 222 all penetrate the sliding groove 221 to form a connecting groove 224, and the connection between the guide groove 222 and the top of the sliding groove 221 is provided with a connecting arc 223. A guide slider 281 is fixed on the front and rear sides of the left sealing plate 25, and a guide slider 281 is fixed on the front and rear sides of the right sealing plate 28. The left sealing plate 25 is slidably connected to the left side of the sliding groove 221, and the right sealing plate 28 is slidably connected to the right side of the sliding groove 221. The bottom distance between the right sealing plate 28 and the left sealing plate 25 forms an air inlet 27. The connecting head 22 is slidably installed in the mounting groove 211. The left sealing plate 25 and the right sealing plate 28 are both connected to the connecting bracket 21, and the air inlet 27 is placed directly above the air inlet 26.

[0030] Two rotating shafts are provided on the outer ring surface of the connecting card holder 21. The electric lifting rod 6 is movably connected to the connecting air head 2 through the rotating shafts, and the axis of the rotating shafts is on the same straight line as the axis of the connecting rotating head 22. The arc length of the left sealing plate 25 is greater than the arc length of the right sealing plate 28. The top of the right sealing plate 28 and the top of the left sealing plate 25 are both provided with connecting arc surfaces 282. The arc of the connecting arc surface 282 is consistent with the arc of the connecting arc 223. The left sealing plate 25 is in contact with the top of the left connecting groove 224, and there is a gap between the right sealing plate 28 and the top of the right connecting groove 224.

[0031] A notch 1 is provided on the lower left side of the outer ring surface of the connecting head 22, and a notch 2 is provided on the lower right side of the outer ring surface of the connecting head 22. A protrusion 1 is provided on the lower left side of the bottom surface of the mounting groove 211, and a protrusion 2 is provided on the lower right side of the bottom surface of the mounting groove 211. The protrusion 1 is placed on the notch 1 and connected to the left sealing plate 25, and the protrusion 2 is placed on the notch 2 and connected to the right sealing plate 28. There is a gap between the bottom of the notch 2 and the protrusion 2. When the connecting card seat 21 rotates with the smoking plate 1, since the connecting card seat 21 is connected to the left sealing plate 25 and the right sealing plate 28 through the protrusion 1 and the protrusion 2, it can drive the left sealing plate 25 and the right sealing plate 28 to rotate together, which can ensure that the size of the second air inlet 27 remains unchanged and is always directly above the first air inlet 26.

[0032] In actual use, when the smoke plate 1 is tilted, the connecting bracket 21 will shift along with the smoke plate 1. Since the connecting bracket 21 is connected to the left sealing plate 25 and the right sealing plate 28 via protrusions one and two respectively, and there is a gap between the bottom of notch two and protrusion two, the arc length of the left sealing plate 25 is greater than that of the right sealing plate 28, the left sealing plate 25 contacts the top of the left connecting groove 224, and there is a gap between the right sealing plate 28 and the top of the right connecting groove 224, the connecting bracket 21 in its initial state can only rotate counterclockwise around the axis of rotation. During the rotation of the connecting bracket 21, the air inlet 27 formed by the gap between the bottom ends of the right sealing plate 28 and the left sealing plate 25 will rotate along with the connecting bracket 21, thus ensuring that the size of the air inlet 27 remains unchanged and is always directly above the air inlet 26, without affecting the normal inhalation of fumes. After inhaling fumes, the air inlet 27 on the inner wall of the connecting head 22 and the left sealing plate 28... Oil fumes adhere to the surfaces of plate 5 and the right sealing plate 28. When the oil fumes dissolve at high temperature, the guide grooves 222 at the uppermost end of the sliding groove 221 penetrate inward to form a connecting groove 224. A connecting arc 223 is provided at the connection between the guide groove 222 and the top of the sliding groove 221. Connecting arc surfaces 282 are provided at the top of both the right sealing plate 28 and the left sealing plate 25. The curvature of the connecting arc surfaces 282 matches the curvature of the connecting arc 223. The fumes will flow out along the connecting arc 223 and the connecting arc surface 282, and will not accumulate on the top of the guide groove 222, the right sealing plate 28, and the left sealing plate 25. Through the connecting bracket 21, the left sealing plate 25, the right sealing plate 28, and the connecting turn head 22, when the smoke extraction plate 1 is deflected, the size of the second air inlet 27 can be kept unchanged and it is always directly above the first air inlet 26, which will not affect the normal intake of fumes and improve the efficiency of smoke extraction.

[0033] A method for using a range hood with a lifting function, the method of use is as follows:

[0034] S1. When it is necessary to lower the smoke extraction plate 1, the power supply of switch one is turned on in the positive direction. Since the electric lifting rod 6 and the electric telescopic rod 51 are connected in series, the electric lifting rod 6 will move down synchronously with the electric telescopic rod 51, thereby causing the smoke extraction plate 1 to move down. During the downward movement, the corrugated pipe 29 is stretched to ensure the normal discharge of oil fumes.

[0035] S2. When it is necessary to tilt the smoke plate 1, the power of the second switch is turned on in the forward direction. The drive motor 551 will drive the pulley 2 552 to rotate. The rotating pulley 2 552 will drive the two pulleys 1 531 to rotate, thereby causing the connecting screw sleeve 53 to rotate. Since the connecting screw sleeve 53 is connected to the lifting push rod 54 by threads, the lifting push rod 54 will descend, causing the smoke plate 1 to rotate counterclockwise around the axis of rotation. During the rotation, the connecting bracket 21 will rotate together to ensure that the size of the second air inlet 27 remains unchanged and is always directly above the first air inlet 26.

[0036] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A range hood with lifting function, comprising a smoke extraction plate (1), a connecting gas head (2), a lifting assembly (5), an exhaust box (3), an electric lifting rod (6), and a mounting frame (4), wherein a fixing plate is welded to the right side surface of the mounting frame (4), characterized in that, The exhaust box (3) is installed on the upper surface of the fixed plate. A lifting assembly (5) is provided on the left side of the lower surface of the fixed plate. The lower end of the lifting assembly (5) is movably connected to the upper surface of the smoke plate (1). The air outlet on the smoke plate (1) is connected to the connecting air head (2). The upper end of the connecting air head (2) passes through the fixed plate and is connected to the air inlet of the exhaust box (3). Two electric lifting rods (6) are symmetrically installed on the lower surface of the fixed plate. The push rod of the electric lifting rod (6) is movably connected to the connecting air head (2). The connecting air head (2) includes a connecting bracket (21), a connecting rotor (22), a connecting pipe (23), a left sealing plate (25), a right sealing plate (28), and a corrugated pipe (29). The lifting assembly (5) includes an electric telescopic rod (51), a rotating bearing (52), a connecting screw sleeve (53), a lifting push rod (54), and a mounting plate (55). In the connecting head (2), a connecting pipe (23) is fixed to the upper end of the outer ring surface of the connecting head (22), and a corrugated pipe (29) is connected to the connecting pipe (23). An exhaust port (24) is opened at the upper end of the connecting head (22). An installation groove (211) is opened on the upper end surface of the connecting seat (21). An air inlet (26) is opened on the bottom end surface of the connecting seat (21). An arc-shaped opening is opened on the lower end surface of the connecting head (22). Sliding grooves (221) are opened on the left and right sides of the inner ring surface of the connecting head (22). A guide groove (222) is opened on the sliding groove (221). The guide groove (222) at the uppermost end of each sliding groove (221) penetrates the sliding groove (221) to form a connecting groove (224). A connecting arc (223) is provided at the connection between the top of the sliding groove (222) and the top of the sliding groove (221). A guide slider (281) is fixed on the front and rear sides of the left sealing plate (25). A guide slider (281) is fixed on the front and rear sides of the right sealing plate (28). The left sealing plate (25) is slidably connected to the left side of the sliding groove (221). The right sealing plate (28) is slidably connected to the right side of the sliding groove (221). The bottom distance between the right sealing plate (28) and the left sealing plate (25) forms an air inlet two (27). The connecting head (22) is slidably installed in the mounting groove (211). The left sealing plate (25) and the right sealing plate (28) are both connected to the connecting bracket (21). The air inlet two (27) is placed directly above the air inlet one (26). Two electric telescopic rods (51) are provided. A mounting plate (55) is fixed between the lower ends of the push rods of the two electric telescopic rods (51). A drive motor (551) is mounted on the mounting plate (55). The output shaft of the drive motor (551) passes through the mounting plate (55) and is located at the lower end of the mounting plate (55). A pulley (552) is mounted on the output shaft of the drive motor (551). A rotating bearing (52) is provided at the bottom end of the push rod of each electric telescopic rod (51). The connecting screw sleeve (53) is movably connected to the lower end of the electric telescopic rod (51) through the rotating bearing (52). A pulley (53) is provided on the outer ring surface of the connecting screw sleeve (53). 1) The first pulley (531) and the second pulley (552) are connected by a connecting belt (532). The bottom end of the electric telescopic rod (51) is fixed with a guide rod (511). The top end of the lifting push rod (54) is provided with a guide groove. The lifting push rod (54) is threadedly connected to the connecting screw sleeve (53). The guide rod (511) is slidably placed in the guide groove. The guide rod (511) is provided with a limit block (512). The lifting and lowering of the electric telescopic rod (51) and the electric lifting rod (6) can be controlled, so that the smoking plate (1) can be raised or lowered. The lifting push rod (54) can be controlled independently, so that the smoking plate (1) can be offset at a certain angle.

2. A range hood with lifting function as described in claim 1, characterized in that: Two connecting shaft blocks are installed on the rear side of the upper surface of the smoking plate (1). The lower surface of the lifting push rod (54) is provided with a connecting shaft hole. The lifting push rod (54) and the connecting shaft block are movably connected through the connecting shaft hole and the connecting shaft pin. The guide rod (511) is a square structure. The guide groove is a square structure. The electric lifting rod (6) and the electric telescopic rod (51) are connected in series and connected to switch one. The drive motor (551) and the electric telescopic rod (51) are connected in parallel and connected to switch two. When the power supply of the electric lifting rod (6) or the electric telescopic rod (51) is turned on, the electric lifting rod (6) and the electric telescopic rod (51) can be raised and lowered synchronously, so that the smoking plate (1) is raised and lowered as a whole, and the smoking plate (1) can be shifted downwards individually.

3. A range hood with lifting function as described in claim 1, characterized in that: The outer surface of the connecting card holder (21) is provided with two rotating shafts. The electric lifting rod (6) is movably connected to the connecting air head (2) through the rotating shafts. The axis of the rotating shaft is on the same straight line as the axis of the connecting rotating head (22). The arc length of the left sealing plate (25) is greater than that of the right sealing plate (28). The top of the right sealing plate (28) and the top of the left sealing plate (25) are both provided with connecting arc surfaces (282). The curvature of the connecting arc surface (282) is consistent with the curvature of the connecting arc (223). The left sealing plate (25) is in contact with the top of the left connecting groove (224). There is a gap between the right sealing plate (28) and the top of the right connecting groove (224).

4. A range hood with lifting function as described in claim 3, characterized in that: The lower left side of the outer ring surface of the connecting head (22) has a notch 1, and the lower right side of the outer ring surface of the connecting head (22) has a notch 2. The left side of the bottom surface of the mounting groove (211) has a protrusion 1, and the right side of the bottom surface of the mounting groove (211) has a protrusion 2. The protrusion 1 is placed on the notch 1 and connected to the left sealing plate (25). The protrusion 2 is placed on the notch 2 and connected to the right sealing plate (28). There is a gap between the bottom of the notch 2 and the protrusion 2. When the connecting card seat (21) rotates with the smoking plate (1), since the connecting card seat (21) is connected to the left sealing plate (25) and the right sealing plate (28) through the protrusion 1 and the protrusion 2, it can drive the left sealing plate (25) and the right sealing plate (28) to rotate together, which can ensure that the size of the second air inlet (27) remains unchanged and is always directly above the first air inlet (26).

5. A method of using a range hood with lifting function as described in any one of claims 1 to 4, characterized in that: S1. When it is necessary to lower the smoke extraction plate (1), the power supply of switch one is turned on in the positive direction. Since the electric lifting rod (6) and the electric telescopic rod (51) are connected in series, the electric lifting rod (6) will move down synchronously with the electric telescopic rod (51), thereby causing the smoke extraction plate (1) to move down. During the downward movement, the corrugated pipe (29) is stretched to ensure the normal discharge of oil fumes. S2. When it is necessary to tilt the smoking plate (1), the power supply of switch two is turned on in the forward direction. The drive motor (551) will drive pulley two (552) to rotate. The rotating pulley two (552) will drive the two pulleys one (531) to rotate, thereby causing the connecting screw sleeve (53) to rotate. Since the connecting screw sleeve (53) and the lifting push rod (54) are connected by threads, the lifting push rod (54) will descend, causing the smoking plate (1) to rotate counterclockwise around the axis of rotation. During the rotation, the connecting bracket (21) will rotate together to ensure that the size of the air inlet two (27) remains unchanged and is always directly above the air inlet one (26).

Images