Commercial range hood capable of discharging air in multiple directions

Abstract

A commercial range hood capable of discharging air in multiple directions comprises a range hood body, the range hood body comprises a smoke discharging mechanism, the smoke discharging mechanism comprises a draught fan and a draught fan box, the draught fan box comprises a draught fan box framework and cover plates, the front side face, the upper side face, the rear side face, the left side face and the right side face of the draught fan box are rotary cover plates, and the lower side face of the draught fan box is a closed cover plate. A connecting assembly for changing the rotating direction of the cover plate is arranged between the cover plate and the fan box framework; two supporting frames are arranged at the bottom end of the fan, mounting holes are formed in the two ends of each supporting frame respectively, and threaded holes are correspondingly formed in the end faces of the fan box framework. When the fan box is arranged on the left side, the rotary cover plate is changed into eight air outlet directions of front-upper, front-lower, upper-front, upper-rear, rear-upper, rear-lower, left-upper and left-lower; and when the fan box is arranged on the right side, the rotary cover plate is changed into eight air outlet directions including front upper, front lower, upper front, upper rear, rear upper, rear lower, right upper and right lower, totally 16 air outlet directions.

Description

Technical Field

[0001] The invention belongs to the field of range hoods, and in particular relates to a commercial range hood capable of discharging air in multiple directions. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. It is installed above the stove to quickly extract the waste smoke from the stove and the oil fumes that are harmful to the human body produced during the cooking process, and discharge them outdoors to reduce pollution and purify the air. However, there are some difficult-to-solve problems with existing range hoods during use: The all-in-one oil fume purification machine, which has been increasingly popular in the catering oil fume purification equipment industry in the past 10 years, currently has an overall fixed structure on the upper part. After being processed and formed once according to terminal demand, the air outlet cannot be changed. However, there are 16 possible smoke exhaust outlets for on-site installation. The existing industry equipment only has one fixed air outlet, which obviously cannot fully meet the needs of these 16 possibilities. This also leads to each of the existing all-in-one oil fume purification equipment being processed according to customized needs, and cannot meet the standards of standardized products and become more popular. Summary of the invention

[0003] In view of the above, the present invention provides a commercial range hood capable of discharging air in multiple directions to solve the problems raised in the above background technology.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a commercial range hood capable of discharging air in multiple directions, comprising a range hood, the range hood comprising a smoke exhaust mechanism capable of changing the direction of the air outlet, the smoke exhaust mechanism comprising a fan for sucking oil smoke and a fan box for placing the fan, the air inlet of the fan box being detachably connected to the left and right sides of the upper end of the range hood respectively, the fan box comprising a fan box frame and a cover plate of a cubic structure, the front, upper, rear, left / right four sides of the fan box are all detachable rotating cover plates, the lower side of the fan box is a closed cover plate integrally formed with the fan box frame, a connecting component for changing the direction of the rotating cover plate is arranged between the cover plate and the fan box frame; When the chassis is placed on the left, the rotating cover plate can be changed into eight air outlet directions, namely, front upper, front lower, upper front, upper rear, rear upper, rear lower, left upper, and left lower; when the fan box is placed on the right, the rotating cover plate can be changed into eight air outlet directions, namely, front upper, front lower, upper front, upper rear, rear upper, rear lower, right upper, and right lower; two parallel support frames are provided at the bottom end of the fan, and mounting holes are provided at both ends of each support frame, and threaded holes corresponding to the positions of the mounting holes are provided on each end face of the fan box frame, and at least four threaded holes are provided and the positions of the threaded holes are arranged in a square, so that the fan can be horizontally rotated by 0°, 90°, 180°, and 270° in the fan box.

[0005] Furthermore, the rotating cover plate includes a first rotating cover plate, a second rotating cover plate, a third rotating cover plate, and a fourth rotating cover plate, and the direction of the air outlet is changed upward or downward by the first rotating cover plate, the second rotating cover plate, the third rotating cover plate, and the fourth rotating cover plate.

[0006] Furthermore, the connecting assembly includes a rotating shaft, and the middle position of each rotating cover plate is laterally connected to the middle position of the four side surfaces of the fan box frame through the rotating shaft, so that the four rotating cover plates are respectively matched and installed on any one of the four side surfaces of the fan box frame, and are rotated upward or downward through the rotating shaft to change the direction of the air outlet and smoke exhaust port, and the first, second, third and fourth rotating cover plates are respectively provided with limit blocks for rotation adjustment between the fan box frame and the first, second, third and fourth rotating cover plates.

[0007] Furthermore, the closed cover plate and each rotating cover plate are provided with telescopic rods supporting adjacent cover plates around the outer sides of the back side, and sliding grooves for fixing the telescopic rods are provided at both ends of the telescopic rods. A plurality of hooks for hooking the telescopic rods to rotate the rotating cover plates are provided next to the telescopic rods, and the plurality of hooks are on the same horizontal line; the connection method between the rotating cover plates is adjusted so that the telescopic rod on one cover plate is extended and fixed in the corresponding sliding groove of the adjacent cover plate, and the other end of this cover plate is fixed to the telescopic rod of the adjacent cover plate by a hook, thereby changing the direction of the air outlet and smoke exhaust port.

[0008] Furthermore, the connecting assembly includes a plurality of connecting holes located on the cover plate and the fan box frame, and rotatable and removable bolts are provided on the connecting holes. The connecting holes are respectively located at four angles of each end face of the rotating cover plate, and at four angles of each end face of the fan box frame corresponding to the rotating cover plate. By adjusting the length of the bolts, the cover plate can be opened upward or downward to change the direction of the air outlet and smoke exhaust port.

[0009] Furthermore, it also includes a fixing plate installed above the range hood and symmetrically arranged with the fan box. When the fan box is placed on the left, the fixing plate is placed on the right; when the fan box is placed on the right, the fixing plate is placed on the left.

[0010] Furthermore, the fan box and the range hood contact surface are connected via a flange, the fixing plate and the range hood are also connected via a flange, and flange holes can be provided on the fan box and the range hood for flange connection.

[0011] Furthermore, the range hood includes a fireproof and oilproof plate, a pre-treatment interception device smoke hood, and an oil fume purifier. The oil fume passes through the fireproof and oilproof plate, the pre-treatment interception device smoke hood, and the oil fume purifier to reach the fan box and then is discharged into the exhaust duct. The oil fume is adsorbed and purified by various components of the range hood and is finally discharged through the fan box.

[0012] Furthermore, an air-leakage-proof sealing ring is provided at the joint between the cover plate and the fan box frame to prevent air leakage.

[0013] The beneficial effects of the present invention are as follows: when the fan box is placed on the left, by adjusting the connecting assembly, the rotating cover plate can be changed into 8 air outlet directions, namely front upper, front lower, upper front, upper rear, rear upper, rear lower, left upper, and left lower; when the fan box is placed on the right, by adjusting the connecting assembly, the rotating cover plate can be changed into 8 air outlet directions, namely front upper, front lower, upper front, upper rear, rear upper, rear lower, right upper, and right lower; there are a total of 16 air outlet directions, and the appropriate air outlet direction can be selected according to the actual situation of the site. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention when the fan box is placed on the right.

[0015] Figure 2 It is a structural diagram when the left air inlet of the fan box is connected to the right side of the range hood.

[0016] Figure 3 It is a structural schematic diagram of the change of direction of the air and smoke outlet when the fan box is placed on the right and the rotating cover plate is rotated upward or downward through the rotating shaft.

[0017] Figure 4 It is a schematic diagram of the cover structure when the connecting components are a hook, a support frame, and a slide groove.

[0018] Figure 5 It is a structural schematic diagram of the change of direction of the air and smoke outlet when the right-hand side of the fan box cooperates with the support frame to make the rotating cover plate rotate upward or downward.

[0019] Figure 6 It is a structural schematic diagram of the change of direction of the air and smoke outlet when the right side of the fan box is arranged and the bolts and the connecting holes are matched to make the rotating cover plate rotate upward or downward.

[0020] Figure 7 It is a structural schematic diagram of the present invention when the wind machine box is placed on the left.

[0021] Figure 8 It is a structural diagram when the right air inlet of the fan box is connected to the left side of the range hood.

[0022] Fig. 9 It is a structural schematic diagram of the change of direction of the air and smoke outlet when the fan box is placed on the left and the rotating cover is rotated upward or downward through the rotating shaft.

[0023] Fig.10 It is a structural schematic diagram of the change of direction of the air and smoke outlet when the fan box is placed on the left and the hook cooperates with the support frame to make the rotating cover plate rotate upward or downward.

[0024] Fig.11 It is a structural schematic diagram of the left-side placement of the fan box, in which the direction of the air and smoke outlet is changed when the rotating cover plate is rotated upward or downward through the cooperation of bolts and connecting holes.

[0025] Fig.12 It is a structural diagram of the fan box.

[0026] Fig.13 It is a structural diagram of the fan.

[0027] exist Figure 1-Figure 13 Among them, 1. range hood; 101. fireproof and oil-proof plate; 102. pre-treatment interception device smoke hood; 103. oil fume purifier; 2. fan box; 201. fan box frame; 3. closed cover; 4. rotating cover; 401. first rotating cover; 402. second rotating cover; 403. third rotating cover; 404. fourth rotating cover; 501. rotating shaft; 502. limiting block; 601. telescopic rod; 602. hook; 603. slide; 701. connecting hole; 702. bolt; 8. fan; 801. support frame; 802. mounting hole; 803. threaded hole; 9. fixing plate. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and some implementation methods.

[0029] exist Figure 1-Figure 13In the invention, a commercial range hood 1 capable of discharging air in multiple directions comprises a range hood 1, which is a common household range hood or a commercial range hood, etc. The range hood 1 comprises a smoke exhaust mechanism capable of changing the direction of the air outlet, the smoke exhaust mechanism comprises a fan 8 for sucking oil smoke, and a fan box 2 for placing the fan 8, the air inlet of the fan box 2 can be detachably connected to the left and right sides of the upper end of the range hood 1, respectively, the fan box 2 comprises a fan box frame 201 of a cube structure, a cover plate, and the The front, top, back, left / right sides of the fan box 2 are all detachable rotating cover plates 4, which can be installed on the fan box frame 201 by means of screws, bolts 702, etc. The lower side of the fan box 2 is a closed cover plate 3 and the fan box frame 201 are integrally formed. A connecting component for changing the direction of the rotating cover plate 4 is provided between the cover plate and the fan box frame 201, and the air outlet direction of the rotating cover plate 4 is changed by the connecting component; when the fan box 2 is left, the rotating cover plate 4 is changed to the front upper , front lower, upper front, upper rear, rear upper, rear lower, left upper, left lower; when the fan box 2 is right-placed, the rotating cover plate 4 is changed to 8 air outlet directions, namely front upper, front lower, upper front, upper rear, rear upper, rear lower, right upper, and right lower; the bottom end of the fan 8 is provided with two parallel support frames 801, each of which has mounting holes 802 at both ends, and each end face of the fan box frame 201 is provided with a hole corresponding to the position of the mounting hole 802 Corresponding threaded holes 803, there are at least four threaded holes 803 and the hole positions of the threaded holes 803 are arranged in a square shape. It is preferable that the number of threaded holes 803 is four, so that the fan 8 can be horizontally rotated by 0°, 90°, 180°, and 270° in the fan box 2. The position of the fan 8 inside the fan box 2 is adjusted according to the actual air outlet direction. The fan 8 is installed on the fan box frame 201 with bolts 702 and other parts, and cooperates with the rotating cover plate 4 to meet the needs of each air outlet.

[0030] In this embodiment, the rotating cover plate 4 includes a first, a second, a third, and a fourth rotating cover plate 404. When the fan box 2 is placed on the left, the front, top, rear, and left four end surfaces of the fan box 2 correspond to the first rotating cover plate 401, the second rotating cover plate 402, the third rotating cover plate 403, and the fourth rotating cover plate 404 respectively. When the fan box 2 is placed on the right, the front, top, rear, and right four end surfaces of the fan box 2 correspond to the first rotating cover plate 401, the second rotating cover plate 402, the third rotating cover plate 403, and the fourth rotating cover plate 404 respectively. The direction of the air outlet is changed by tilting the first rotating cover plate 401, the second rotating cover plate 402, the third rotating cover plate 403, and the fourth rotating cover plate 404 upward or downward.

[0031] In this embodiment, the connecting assembly includes a rotating shaft 501, and the middle position of each rotating cover plate 4 is horizontally connected to the middle position of the four sides of the fan box frame 201 through the rotating shaft 501, so that the four rotating cover plates 4 are respectively matched and installed on any one of the four sides of the fan box frame 201, and rotated upward or downward through the rotating shaft 501 to change the direction of the air and smoke outlet. The first, second, third, and fourth rotating cover plates 404 are respectively provided with limit blocks 502 for rotation adjustment between the fan box frame 201, such as Figure 3 As shown, when the fan box 2 is placed on the right, the right side of the range hood 1 and the left side of the fan box 2 are connected to the air inlet surface, and the oil smoke is discharged from the right end surface of the fan box 2, the rotating cover plate 4 on the right end surface of the fan box 2 is the fourth rotating cover plate 404, and the limit block 502 of the fourth rotating cover plate 404 is opened. When the air outlet of the fan 8 in the fan box 2 is installed upward, the fourth rotating cover plate 404 is rotated by the rotating shaft 501 and also rotates upward; when the air outlet of the fan 8 in the fan box 2 is installed downward, the fourth rotating cover plate 404 is also rotated downward, so that the smoke exhaust installation requirements of the two air outlets of the fourth rotating cover plate 404, which are upward and downward, can be achieved; similarly, in conjunction with the change of the installation position of the base of the fan 8 in the fan box 2, the orientation requirements of the eight air outlets of the first, second, third and fourth rotating cover plates 404 are met; as shown Fig. 9 As shown, when the fan box 2 is placed on the left, when the left side of the range hood 1 and the right side air inlet surface of the fan box 2 are connected, and the oil smoke is discharged from the left end surface of the fan box 2, the left rotating cover 4 of the fan box 2 is the fourth rotating cover 404, the limit block 502 of the fourth rotating cover 404 is opened, and the fourth rotating cover 404 is rotated by the shaft 501, so that the fourth rotating cover 404 can realize the installation requirements of the two upper and lower air outlets for smoke exhaust. Similarly, by cooperating with the change of the installation position of the base of the fan 8 in the fan box 2, the orientation requirements of the eight air outlets of the first, second, third, and fourth rotating cover plates 404 are met; this fan box 2 that can change the direction of the air outlet can realize the function of 16 air outlet directions of the range hood 1 by combining with the left and right positions of the range hood 1.

[0032] In this embodiment, the closed cover plate 3 and each rotating cover plate 4 are provided with telescopic rods 601 supporting adjacent cover plates on all sides of the outer sides of the back side. The telescopic rods 601 are common manual telescopic rods 601. Slide grooves 603 for fixing the telescopic rods 601 are provided at both ends of the telescopic rods 601. A plurality of hooks 602 for hooking the telescopic rods 601 to rotate the rotating cover plates 4 are provided beside the telescopic rods 601. The plurality of hooks 602 are on the same horizontal line. The connection mode between the rotating cover plates 4 is adjusted so that the telescopic rod 601 on one cover plate is extended and fixed in the corresponding slide groove 603 of the adjacent cover plate. The other end of this cover plate is fixed to the telescopic rod 601 of the adjacent cover plate by the hook 602, so as to change the direction of the air and smoke exhaust port. Figure 5As shown, when the fan box 2 is placed to the right, the right side of the range hood 1 and the left side of the fan box 2 are connected to the air inlet surface, and the oil smoke is discharged from the right end surface of the fan box 2, the rotating cover plate 4 on the right end surface of the fan box 2 is the fourth rotating cover plate 404, and the telescopic rod 601 at the upper end of the fourth rotating cover plate 404 is extended and buckled into the slide groove 603 at the right end of the second rotating cover plate 402, and the hook 602 at the lower end of the fourth rotating cover plate 404 hooks the telescopic rod 601 at the right end of the closed cover plate 3, thereby achieving the purpose of the fourth cover plate opening upward. Similarly, according to the same method, the fourth rotating cover plate 404 has a total of four air outlets, namely, upward, downward, front, and rear, and the front air outlet of the fourth rotating cover plate 404 overlaps with the right air outlet of the first rotating cover plate 401. By analogy, when the fan box 2 is placed to the right, the installation position of the base of the fan 8 in the fan box 2 is changed, and a total of 8 non-overlapping air outlet directions are formed; similarly, Fig.10 As shown, when the fan 8 is placed on the left, eight non-overlapping air outlet directions can be obtained; this fan box 2 that can change the air outlet direction can realize the function of 16 air outlet directions of the range hood 1 by combining with the left and right positions of the range hood 1.

[0033] In this embodiment, the connection assembly includes a plurality of connection holes 701 located on the cover plate and the fan box frame 201, and a rotatable and detachable bolt 702 is provided on the connection hole 701. The connection holes 701 are respectively located at four angles of each end face of the rotating cover plate 4 and at four angles of each end face of the fan box frame 201 corresponding to the rotating cover plate 4. By adjusting the length of the bolt 702, the cover plate is opened upward or downward, and the direction of the air outlet and smoke exhaust port is changed; Figure 6 As shown, when the fan box 2 is placed to the right, the right side of the range hood 1 and the left side of the fan box 2 are connected to the air inlet surface, and the oil smoke is discharged from the right end surface of the fan box 2, the rotating cover plate 4 on the right end surface of the fan box 2 is the fourth rotating cover plate 404, and a small part of the length of the bolt 702 at the upper end of the fourth rotating cover plate 404 is screwed into the connecting hole 701 on the fan box frame 201, and most of the length of the bolt 702 at the lower end of the fourth cover plate is screwed into the connecting hole 701 on the fan box frame 201, thereby achieving the purpose of the upper opening of the fourth rotating cover plate 404. Similarly, according to the same method, the fourth rotating cover plate 404 has a total of four air outlets, namely, upper, lower, front, and rear, and the front air outlet of the fourth rotating cover plate 404 overlaps with the right air outlet of the first rotating cover plate 401. By analogy, when the fan box 2 is placed to the right, the installation position of the base of the fan 8 in the fan box 2 is changed, and a total of 8 non-overlapping air outlet directions are provided; similarly, Fig.11 As shown, when the fan 8 is placed on the left, eight non-overlapping air outlet directions can be obtained; this fan box 2 that can change the air outlet direction can realize the function of 16 air outlet directions of the range hood 1 by combining with the left and right positions of the range hood 1.

[0034] In this embodiment, it also includes a fixing plate 9 installed above the range hood 1 and symmetrically arranged with the fan box 2. When the fan box 2 is placed on the left, the fixing plate 9 is placed on the right; when the fan box 2 is placed on the right, the fixing plate 9 is placed on the left.

[0035] In this embodiment, the contact surface of the fan box 2 and the range hood 1 is connected via a flange, and the fixing plate 9 and the range hood 1 are also connected via a flange. Flange holes can be provided on the fan box 2 and the range hood 1 for flange connection.

[0036] In this embodiment, the range hood 1 includes a fireproof and oilproof plate 101, a pre-treatment interception device smoke hood 102, and an oil fume purifier 103. The oil fume passes through the fireproof and oilproof plate 101, the pre-treatment interception device smoke hood 102, and the oil fume purifier 103 to reach the fan box 2 and then is discharged into the smoke exhaust duct. The oil fume is adsorbed and purified by the various components of the range hood 1 and is finally discharged through the fan box 2.

[0037] In this embodiment, an air leakage-proof sealing ring is provided at the joint between the cover plate and the fan box frame 201 to prevent air leakage.

[0038] In this embodiment, the fan 8 includes an outer rotor fan, which is a common fan device, such as RHA560D4.155B-3KT model, DKT6D-300 model and other fan devices.

[0039] In this embodiment, the range hood 1 body is a common range hood purifier, such as a BLT-JDS-6A range hood purifier.

[0040] In this embodiment, the control circuit of the present invention is a common circuit in the circuit field. The device of the present invention can be connected to an external power supply or a built-in battery through a power cord to provide power for the device. Technicians in the relevant technical field can implement it and will not be elaborated here.

[0041] The present invention is specifically implemented as follows: when in use, during the cooking process, the oil smoke passes through the fireproof and oilproof plate 101, the pre-treatment interception device smoke hood 102, the oil smoke purifier 103 and other equipment of the range hood 1 to reach the fan box 2 and then be discharged into the smoke exhaust duct, and finally be discharged through the smoke exhaust duct. When the range hood 1 is placed on the right, the right side of the range hood 1 is connected to the left air inlet surface of the fan box 2, and the oil smoke is discharged from the right end surface of the fan box 2, the right end surface of the fan box 2 is rotated to form a fourth rotary cover plate 404, and the fourth rotary cover plate 404 is hung by rotating the rotating shaft 501 / changing the fourth rotary cover plate 404. The direction of the air outlet of the fourth rotating cover plate 404 is changed by changing the connection position between the hook 602 and the telescopic rod 601 / changing the screwing length of the bolt 702 at different positions, etc., and cooperating with the change of the installation position of the base of the fan 8 in the fan box 2, so as to meet the orientation requirements of the 8 non-overlapping air outlets of the first, second, third and fourth rotating cover plates 404; similarly, when the fan 8 is placed on the left, the orientation requirements of the 8 non-overlapping air outlets can also be met; this fan box 2 that can change the direction of the air outlet can realize the function of 16 air outlet directions of the range hood 1 by combining it with the left and right positions of the range hood 1.

[0042] It is worth noting that: in the description of the present invention, the meaning of "multiple" is two or more than two, unless otherwise clearly defined. In the present invention, unless otherwise clearly defined and defined, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0043] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A commercial range hood capable of discharging air in multiple directions, comprising a range hood, characterized in that: The range hood comprises a smoke exhaust mechanism capable of changing the direction of an air outlet, the smoke exhaust mechanism comprises a fan for extracting oil smoke and a fan box for placing the fan, the air inlet of the fan box can be detachably connected to the left and right sides of the upper end of the range hood, respectively, the fan box comprises a fan box frame and a cover plate of a cube structure, the front, upper, rear, left / right four sides of the fan box are all detachable rotating cover plates, the lower side of the fan box is a closed cover plate and is integrally formed with the fan box frame, and a connecting component for changing the direction of the rotating cover plate is arranged between the cover plate and the fan box frame; when the fan box is placed on the left, the rotating cover plate is changed into eight air outlet directions of front upper, front lower, upper front, upper rear, rear upper, rear lower, left upper, and left lower; when the fan box is placed on the right, the rotating cover plate is changed into eight air outlet directions of front upper, front lower, upper front, upper rear, rear upper, rear lower, right upper, and right lower; Two parallel support frames are arranged at the bottom end of the fan, and mounting holes are arranged at both ends of each support frame. A threaded hole corresponding to the position of the mounting hole is arranged on each end face of the fan box frame. There are at least four threaded holes and the positions of the threaded holes are arranged in a square, so that the fan can be horizontally rotated by 0°, 90°, 180°, and 270° in the fan box.

2. A commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: The rotating cover plate includes a first, a second, a third and a fourth rotating cover plate.

3. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: The connecting assembly includes a rotating shaft, and the middle position of each rotating cover plate is laterally connected to the middle position of the four side surfaces of the fan box frame through the rotating shaft, so that the four rotating cover plates are respectively matched and installed on any one of the four side surfaces of the fan box frame, and are rotated upward or downward through the rotating shaft to change the direction of the air outlet and smoke exhaust port. Limit blocks for rotation adjustment are respectively arranged between the first, second, third and fourth rotating cover plates and the fan box frame.

4. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: The closed cover plate and each rotating cover plate are provided with telescopic rods supporting adjacent cover plates around the outer sides of the back side, and sliding grooves for fixing the telescopic rods are provided at both ends of the telescopic rods. A plurality of hooks for hooking the telescopic rods to rotate the rotating cover plates are provided next to the telescopic rods, and the plurality of hooks are on the same horizontal line. The connection method between the rotating cover plates is adjusted so that the telescopic rod on one cover plate is extended and fixed in the corresponding sliding groove of the adjacent cover plate, and the other end of this cover plate is fixed to the telescopic rod of the adjacent cover plate by a hook to change the direction of the air outlet and smoke exhaust port.

5. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: The connecting assembly includes a plurality of connecting holes located on the rotating cover plate and the fan box frame, and rotatable and removable bolts are provided on the connecting holes. The connecting holes are respectively located at four angles of each end face of the rotating cover plate and at four angles of each end face of the fan box frame corresponding to the rotating cover plate. By adjusting the length of the bolts, the cover plate can be opened upward or downward to change the direction of the air outlet and smoke exhaust port.

6. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: It also includes a fixing plate installed above the range hood and symmetrically arranged with the fan box.

7. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: The fan box is connected to the contact surface of the range hood through a flange, and the fixing plate is also connected to the range hood through a flange.

8. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: The range hood comprises a fireproof and oilproof plate, a pre-treatment interception device smoke hood, and a smoke purifier. The smoke passes through the fireproof and oilproof plate, the pre-treatment interception device smoke hood, and the smoke purifier to reach the fan box and then is discharged into the smoke exhaust duct.

9. The commercial range hood capable of discharging air in multiple directions according to claim 1, characterized in that: A sealing ring for preventing air leakage is arranged at the buckling position between the cover plate and the fan box frame.

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