Pumping and discharging device and oil smoke pumping and discharging equipment

Abstract

The utility model belongs to the technical field of electric appliances, and particularly discloses a pumping and discharging device and oil smoke pumping and discharging equipment. The pumping drainage device comprises a main fan, a mounting bracket and an auxiliary pumping drainage piece. A motor shaft of the main fan is coaxially connected with a transmission shaft; the transmission shaft extends out of an air inlet of the main fan; the mounting bracket is positioned outside the main fan; the auxiliary pumping and discharging pieces are installed on the installation support and at least two auxiliary pumping and discharging pieces are arranged around the transmission shaft at intervals, and the transmission shaft is in transmission connection with the auxiliary pumping and discharging pieces, so that rotation of the motor shaft drives all the auxiliary pumping and discharging pieces to rotate to form negative pressure in the direction away from the air inlet of the main draught fan. The oil fume pumping and discharging equipment comprises an oil fume collecting hood with an oil fume collecting cavity and a pumping and discharging device, the pumping and discharging device is installed on the oil fume collecting hood, and at least the installation support and the auxiliary pumping and discharging piece are located in the oil fume collecting cavity. According to the pumping and discharging device and the oil smoke pumping and discharging equipment disclosed by the utility model, the running negative pressure can be increased, the negative pressure acting range can be enlarged, the smoke leakage probability is reduced, and the oil smoke pumping and discharging efficiency and the oil smoke pumping and discharging effect are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical appliances, in particular to an exhaust device and a range hood. Background Art

[0002] Range hoods are commonly used kitchen appliances that can extract oil fumes during the cooking process to purify the kitchen environment and improve the cooking experience.

[0003] Existing range hoods typically consist of a smoke collection hood and a fan. The hood has a smoke inlet and a smoke collection chamber inside. The fan's air inlet is connected to the smoke collection chamber, and its air outlet is connected to a smoke exhaust pipe. When the fan is running, it creates negative pressure at the smoke inlet, forcing cooking fumes into the smoke collection chamber under the negative pressure and then being drawn into the exhaust pipe.

[0004] The oil fume extraction capacity of the range hood provided by the existing technology is mainly determined by the negative pressure generated by the fan at the smoke inlet. When the smoke collecting chamber is large or the smoke inlet is far away from the fan, there will be insufficient local negative pressure at the smoke inlet, resulting in smoke leakage, affecting the smoke extraction effect of the range hood and reducing the user experience of the range hood. Utility Model Content

[0005] One of the technical problems solved by the present invention is to provide a pumping device that can effectively solve the problem of insufficient negative pressure in existing pumping devices, enhance the negative pressure generated when the pumping device is running, and improve the pumping capacity.

[0006] The second technical problem solved by the present invention is to provide an oil fume extraction device, which can effectively solve the serious problem of smoke leakage caused by insufficient negative pressure generated by the extraction device of the existing oil fume extraction equipment, reduce the probability of smoke leakage, and improve the efficiency and effect of oil fume extraction.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A pumping device, comprising:

[0009] A main fan, wherein the motor shaft of the main fan is coaxially connected to a transmission shaft, and the transmission shaft extends out of the air inlet of the main fan;

[0010] A mounting bracket located outside the main fan;

[0011] Auxiliary exhaust components are installed on the mounting bracket and are at least two arranged at intervals around the transmission shaft. The transmission shaft is transmission-connected to the auxiliary exhaust components so that the rotation of the motor shaft drives all the auxiliary exhaust components to rotate to form negative pressure in the direction away from the air inlet of the main fan.

[0012] The exhaust device described in the present invention has the following beneficial effects compared with the background technology: by arranging a main fan and an auxiliary exhaust member that can form a negative pressure in the direction away from the air inlet of the main fan by rotating, the operation of the main fan can form a negative pressure at the smoke inlet, and the rotation of the auxiliary exhaust member can also form a negative pressure at the smoke inlet, thereby enhancing the negative pressure at the smoke inlet, reducing the occurrence of smoke leakage problems, and improving the oil fume exhaust effect; at the same time, since at least two auxiliary exhaust members are arranged at intervals around the transmission shaft, and the transmission shaft is coaxially connected to the motor shaft of the main fan, the auxiliary exhaust member can be more While being arranged close to the smoke inlet, the negative pressure area generated by the auxiliary exhaust component can be relatively far away from the central negative pressure area of the main fan, thereby enhancing the negative pressure at the edge of the negative pressure area of the main fan, expanding the negative pressure range of the exhaust device and the negative pressure size at the edge of the smoke collecting chamber, further reducing the occurrence of smoke leakage problems, and improving the oil fume extraction effect; furthermore, since the auxiliary exhaust component is connected to the motor shaft of the main fan, the rotation of the motor shaft of the main fan drives the auxiliary exhaust component to rotate, so that the main fan and the auxiliary exhaust component share a common driving source, reducing the number of driving sources and reducing the cost of the smoke collecting device.

[0013] In one embodiment, the mounting bracket is fixed relative to the volute of the main fan, the auxiliary exhaust component is rotatably mounted on the mounting bracket, and the rotation of the motor shaft drives the auxiliary exhaust component to rotate relative to the mounting bracket.

[0014] In one embodiment, the motor shaft is connected to the auxiliary pumping and exhausting member via a transmission assembly, and the auxiliary pumping and exhausting member is rotatably mounted on the mounting bracket via a mounting shaft;

[0015] The transmission assembly includes a driving gear and a driven gear. The driven gear is arranged in a one-to-one correspondence with the auxiliary pumping and discharging member and is sleeved on the mounting shaft. The driving gear is fixedly sleeved on the transmission shaft and meshes with the driven gear.

[0016] In one embodiment, both the driving gear and the driven gear have ventilation holes, and at least two ventilation holes are provided at intervals along the circumference of the corresponding driving gear or the driven gear.

[0017] In one embodiment, the transmission shaft rotates through the mounting bracket and is connected to the auxiliary exhaust member through a transmission assembly, and the transmission assembly and the auxiliary exhaust member are both located on a side of the mounting bracket away from the main fan;

[0018] And / or, the mounting bracket includes a sleeve portion and a mounting arm portion, and the mounting arm portion is arranged in multiple intervals along the circumference of the sleeve portion and is arranged one-to-one corresponding to the auxiliary pumping and exhausting member, and the auxiliary pumping and exhausting member is rotatably mounted on one end of the mounting arm portion away from the sleeve portion.

[0019] In one embodiment, a fixing column portion is protruded from the mounting arm portion, and the fixing column portion extends in a direction toward the main fan, and the fixing column portion is used to be connected to a volute or a smoke collecting hood of the main fan.

[0020] In one embodiment, the auxiliary exhaust component includes a fan or an impeller.

[0021] The second technical problem mentioned above is solved by the following technical solution:

[0022] A fume extraction device includes a fume hood having a fume collecting chamber. The fume extraction device also includes the extraction device described above, which is installed on the fume hood, and at least the mounting bracket and the auxiliary extraction component are located in the fume collecting chamber.

[0023] Compared with the background technology, the oil fume extraction equipment described in the present invention has the following beneficial effects: by adopting the above-mentioned oil fume extraction equipment, the negative pressure at the smoke inlet of the smoke collecting chamber can be enhanced, especially the negative pressure at the periphery of the smoke inlet can be enhanced, thereby reducing the probability of smoke leakage problems, improving the oil fume extraction efficiency and extraction effect, and reducing the cost of the oil fume extraction equipment.

[0024] In one embodiment, the main fan is installed outside the smoke collecting hood, and the smoke collecting hood is provided with a smoke outlet directly connected to the air inlet of the main fan, and the transmission shaft passes through the smoke outlet and extends into the smoke collecting chamber.

[0025] In one embodiment, the mounting bracket includes a fixed column portion extending in a direction toward the main fan, and a plurality of the fixed columns are arranged at intervals around the smoke outlet. The fixed columns are detachably connected to the smoke hood or the volute of the main fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of the structure of the oil fume extraction device provided in an embodiment of the present utility model;

[0027] Figure 2 A schematic diagram of the structure of the smoke hood and main fan provided in an embodiment of the utility model;

[0028] Figure 3 A cross-sectional view of a fume extraction device provided in an embodiment of the present utility model;

[0029] Figure 4 A schematic structural diagram of the extraction and exhaust device provided by an embodiment of the present utility model at one viewing angle;

[0030] Figure 5 A schematic structural diagram of the extraction and exhaust device provided by an embodiment of the present utility model from another perspective;

[0031] Figure 6 A schematic diagram of the structure of the mounting bracket provided in an embodiment of the present utility model;

[0032] Figure 7 A schematic structural diagram of the exhaust device provided by an embodiment of the present invention, with the main fan removed, from one viewing angle;

[0033] Figure 8 for Figure 7 Schematic diagram of the structure in another perspective;

[0034] Figure 9 for Figure 7 Cross-sectional view of the structure;

[0035] Figure 10 for Figure 9 A partial enlarged view of point I in the middle;

[0036] Figure 11 This is a schematic structural diagram of the installation shaft provided in an embodiment of the utility model.

[0037] Description of labels:

[0038] 100, exhaust device; 200, smoke hood; 201, smoke collection chamber; 202, smoke outlet; 300, check valve;

[0039] 1. Main fan; 11. Volute; 12. Impeller; 13. Drive motor; 131. Motor shaft; 14. Air guide ring;

[0040] 2. Auxiliary pumping and exhausting parts; 21. Central cylinder; 22. Blades;

[0041] 3. Mounting bracket; 31. Shaft sleeve; 32. Mounting arm; 33. Fixed column; 34. Mounting sleeve;

[0042] 4. Drive shaft;

[0043] 5. Install the rotating shaft; 51. First shaft section; 52. Second shaft section; 53. Third shaft section;

[0044] 6. Transmission assembly; 61. Transmission gear; 61a. Driving gear; 61b. Driven gear; 611. Center ring; 612. Ring gear; 613. Hub; 614. Ventilation hole;

[0045] 7. First locking nut; 8. Second locking nut; 9. Fastening nut. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0048] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0050] This embodiment provides an oil fume extraction device, which is used to extract oil fume, reduce the probability of smoke leakage, and improve the efficiency and effect of oil fume extraction.

[0051] like Figures 1 to 3 As shown, the oil fume extraction equipment provided in this embodiment includes a fume hood 200, an extraction device 100, and an exhaust pipe. The fume hood 200 has a fume collection chamber 201, one side of which is open to form a smoke inlet. The extraction device 100 is at least partially located within the smoke collection chamber 201. Preferably, at least the mounting bracket 3 and the auxiliary extraction unit 2 are located within the smoke collection chamber 201. This creates a negative pressure at the smoke inlet, forcing oil fumes into the smoke collection chamber 201 under the negative pressure and then out through the smoke collection device into the exhaust pipe.

[0052] Specifically, the smoke collection device includes a main fan 1, a mounting bracket 3, and auxiliary exhaust components 2. The main fan 1's motor shaft 131 is coaxially connected to a drive shaft 4, which extends out of the main fan 1's air inlet. The mounting bracket 3 is located outside the main fan 1. The auxiliary exhaust components 2 are mounted on the mounting bracket 3, with at least two spaced around the drive shaft 4. The drive shaft 4 is in driving connection with the auxiliary exhaust components 2, so that rotation of the motor shaft 131 drives all of the auxiliary exhaust components 2, creating negative pressure away from the main fan 1's air inlet.

[0053] The smoke collecting device and oil fume exhaust equipment provided by the present embodiment are provided with a main fan 1 and an auxiliary exhaust member 2 which can form a negative pressure in a direction away from the air inlet of the main fan 1 by rotating. When the main fan 1 is running, a negative pressure is formed at the smoke inlet. At the same time, the rotation of the auxiliary exhaust member 2 can also form a negative pressure at the smoke inlet, thereby enhancing the negative pressure at the smoke inlet, reducing the occurrence of smoke leakage problems, and improving the oil fume exhaust effect. At the same time, since at least two auxiliary exhaust members 2 are arranged at intervals around the transmission shaft 4, and the transmission shaft 4 is coaxially connected to the motor shaft 131 of the main fan 1, the auxiliary exhaust member 2 is arranged closer to the smoke inlet. The negative pressure area generated by the exhaust component 2 can be relatively far away from the central negative pressure area of the main fan 1, thereby enhancing the negative pressure at the edge of the negative pressure area of the main fan 1, expanding the negative pressure action range of the exhaust device 100 and the negative pressure size at the edge of the smoke collecting chamber 201, further reducing the occurrence of smoke leakage problems, and improving the oil fume extraction effect; furthermore, since the auxiliary exhaust component 2 is connected to the impeller 12 shaft of the main fan 1, the rotation of the impeller 12 shaft of the main fan 1 drives the auxiliary exhaust component 2 to rotate, so that the main fan 1 and the auxiliary exhaust component 2 share a common driving source, reducing the number of driving sources, and reducing the cost of the smoke collecting device and the oil fume extraction equipment.

[0054] In one embodiment, the main fan 1 is mounted outside the smoke hood 200. A smoke outlet 202 is defined at the bottom of the smoke collection chamber 201. The smoke outlet 202 is positioned directly opposite the air inlet of the main fan 1. The distal end of the drive shaft 4 extends through the smoke collection chamber 200 and into the smoke collection chamber 201. This configuration can reduce the size requirements of the smoke collection chamber 200, increase the design flexibility of the smoke collection chamber 201, and reduce costs. In other embodiments, the main fan 1 can also be mounted inside the smoke collection chamber 200, with the auxiliary exhaust unit 2 positioned between the main fan 1 and the smoke inlet.

[0055] It is worth noting that, in one embodiment, the oil fume extraction device is a top-suction range hood, whose fume hood 200 has a bottom-open fume inlet, and the main fan 1 is installed on the upper side of the fume hood 200. In other embodiments, the oil fume extraction device can be a side-suction range hood.

[0056] In one embodiment, the cross-section of the smoke collecting chamber 201 perpendicular to the axis of the transmission shaft 4 is rectangular, and four auxiliary exhaust components 2 are provided. The four auxiliary exhaust components 2 are respectively provided corresponding to the four corners of the smoke collecting chamber 201, thereby enhancing the negative pressure at the periphery of the smoke collecting chamber 201, effectively reducing the occurrence of smoke leakage, and improving the efficiency of oil fume extraction.

[0057] In other embodiments, the cross-section of the smoke collecting chamber 201 perpendicular to the axis of the motor shaft 131 can be of other shapes, and the number of auxiliary exhaust components 2 can be two, three, or other numbers. The number and location of the auxiliary exhaust components 2 can be specifically limited according to the size and shape of the smoke collecting chamber 201, and the present invention does not impose any restrictions on this.

[0058] like Figures 3 to 5 As shown, the main fan 1 includes a volute 11, an impeller 12, and a drive motor 13. An air inlet is provided at the first end of the volute 11, and an air outlet is provided on one side of the volute 11. The motor housing of the drive motor 13 is mounted on the second end of the volute 11, and the motor shaft 131 extends into the interior of the volute 11 along the axis of the air inlet. The impeller 12 is fixedly mounted on the motor shaft 131 and is located inside the volute 11, so that the rotation of the motor shaft 131 drives the impeller 12 to rotate, thereby forming a negative pressure at the air inlet to promote airflow into the air inlet and out of the air outlet. In order to reduce air intake noise and improve air intake efficiency, the main fan 1 also includes an air guide ring 14 installed at the air inlet.

[0059] Furthermore, the air outlet of the volute 11 is connected to the smoke exhaust pipe via a check valve 300 to prevent the backflow of external air. It is worth noting that in the present invention, the main fan 1 can adopt the structure of an existing centrifugal fan. The specific structure of the main fan 1 and the check valve 300 is not the focus of improvement of the present invention. The present invention does not limit or elaborate on the specific structure of the main fan 1 and the check valve 300.

[0060] In one embodiment, the mounting bracket 3 is fixed relative to the volute 11 of the main fan 1, and the auxiliary exhaust member 2 is rotatably mounted on the mounting bracket 3. Rotation of the motor shaft 131 drives the auxiliary exhaust member 2 to rotate relative to the mounting bracket 3. This arrangement allows the mounting bracket 3 to be fixed, reducing the driving load of the drive motor 13 and thereby lowering driving costs. Furthermore, the rotatable mounting of the auxiliary exhaust member 2 on the mounting bracket 3 facilitates enhancing the local negative pressure within the smoke collection chamber 201.

[0061] In other embodiments, the mounting bracket 3 can be rotatably connected to the motor shaft 131, that is, the rotation of the motor shaft 131 drives the mounting bracket 3 to rotate, thereby driving the auxiliary pumping member 2 to rotate, so that the mounting bracket 3 and the auxiliary pumping member 2 jointly generate a negative pressure during rotation. In this case, the auxiliary pumping member 2 can be a fan blade structure, with multiple fan blade structures arranged at intervals around the mounting bracket 3.

[0062] The mounting bracket 3 is detachably connected to the smoke hood 200 or the volute 11 of the main fan 1. In one embodiment, the mounting bracket 3 includes a main frame portion, which is spaced apart from the wall of the mounting cavity. The main frame portion is provided with fixed columns 33 extending in a direction toward the main fan 1. A plurality of fixed columns 33 are spaced apart around the smoke outlet 202. The ends of the fixed columns 33 away from the main frame portion are connected to the smoke hood 200 or the volute 11. This arrangement can improve the installation convenience and reliability of the mounting bracket 3 in the smoke hood 200 and improve the practicality of the exhaust device 100 for smoke cavities 201 of different sizes.

[0063] In other embodiments, the side of the mounting bracket 3 may be connected to the side wall of the smoke collecting chamber 201, or the mounting bracket 3 may be fixedly mounted on the smoke collecting hood 200 using other structures. The specific mounting structure of the mounting bracket 3 and the smoke collecting hood 200 may be set according to the specific structure of the smoke collecting hood 200, and the present invention does not limit this.

[0064] In order to better ensure the installation accuracy of the mounting bracket 3, one of the fixed column 33 and the smoke hood 200 is provided with a positioning protrusion, and the other is provided with a positioning groove. The positioning protrusion and the positioning groove are arranged in a one-to-one correspondence, and the positioning protrusion is inserted into the positioning groove to realize the installation positioning of the mounting bracket 3 in the smoke hood 200, so as to better ensure the installation position accuracy and reliability of the auxiliary exhaust component 2 in the smoke hood 200.

[0065] Furthermore, a boss portion is provided on the cavity wall of the smoke collecting chamber 201, and the boss portion is arranged in a one-to-one correspondence with the mounting column portion. A positioning groove is provided on the boss portion, and a positioning convex portion is formed at the end of the fixing column portion 33. The fixing column portion 33 and the smoke collecting hood 200 are connected by fasteners passing through the fixing column portion 33 and the bottom of the positioning groove.

[0066] like Figures 6 to 9 As shown, the transmission shaft 4 is connected to the auxiliary exhaust component 2 through the transmission assembly 6. In one embodiment, the first end of the transmission shaft 4 is coaxially connected to the motor shaft 131, and the second end of the transmission shaft 4 passes through the mounting bracket 3. The auxiliary exhaust component 2 and the transmission assembly 6 are both installed on the side of the mounting bracket 3 away from the main fan 1, thereby avoiding interference between the transmission assembly 6 and the auxiliary exhaust component 2 and the smoke hood 200 and the main fan 1, and improving the installation convenience of the transmission assembly 6 and the auxiliary exhaust component 2 on the mounting bracket 3.

[0067] In one embodiment, the first end of the transmission shaft 4 has an internal thread, and the distal end of the motor shaft 131 has a screw portion that is threaded into the internal thread to connect the transmission shaft 4 to the motor shaft 131. Furthermore, a raised ring portion is provided on the outer wall of the first end of the transmission shaft 4, and a screw groove or operating flat surface is provided on the outer wall of the raised ring portion. Multiple screw grooves or operating flat surfaces are provided at intervals along the circumference of the transmission shaft 4 to facilitate screwing the transmission shaft 4 using a tool such as a wrench.

[0068] In one embodiment, the main frame comprises a sleeve portion 31 and mounting arms 32. The sleeve portion 31 defines a mounting hole for the drive shaft 4. At least two mounting arms 32 extend radially from the sleeve portion 31 and are spaced apart around the sleeve portion 31. Each mounting arm 32 corresponds to an auxiliary exhaust member 2. The second end of the drive shaft 4 passes through the mounting hole, and the auxiliary exhaust member 2 is pivotally mounted on the end of the corresponding mounting arm 32 distal from the sleeve portion 31. This arrangement creates a ventilation channel between adjacent mounting arms 32, reducing the impact of the mounting bracket 3 on airflow resistance and improving airflow smoothness for the main fan 1. Furthermore, this arrangement facilitates the installation of each auxiliary exhaust member 2 while reducing its weight. Furthermore, this mounting bracket 3 structure facilitates controlling the spacing between the auxiliary exhaust member 2 and the drive shaft 4 by adjusting the length of the mounting arms 32, thereby adjusting the negative pressure application position of the auxiliary exhaust member 2 and better accommodating the needs of fume hoods 200 of varying sizes.

[0069] The axial length of the sleeve portion 31 is greater than the axial thickness of the mounting arm portion 32 along the transmission shaft 4, thereby reducing weight while ensuring structural strength and rigidity at the center of the mounting bracket 3. A fixing column portion 33 is provided on the side of the mounting arm portion 32 facing the main fan 1, and the fixing column portion 33 is provided in a one-to-one correspondence with the mounting arm portion 32.

[0070] Furthermore, a weight-reducing groove is provided on the side of the mounting arm 32 away from the fixed column 33, and the weight-reducing groove extends along the length direction of the mounting arm 32, so as to reduce the weight of the mounting bracket 3 while ensuring the overall structural strength and rigidity of the mounting bracket 3, thereby reducing the weight of the exhaust device 100 and the oil fume exhaust equipment.

[0071] The auxiliary extraction and exhaust component 2 is rotatably mounted on the mounting bracket 3 via a mounting shaft 5. The mounting shaft 5 is parallel to and spaced from the drive shaft 4. In one embodiment, a mounting sleeve 34 is provided at the end of the mounting arm 32 distal from the sleeve 31. The sleeve 34 is coaxially disposed with the sleeve 31, and the mounting shaft 5 is rotatably inserted through the sleeve 34. The axial height of the sleeve 34 is greater than the thickness of the mounting arm 32 to ensure structural strength at the connection between the mounting shaft 5 and the mounting bracket 3.

[0072] In one embodiment, the transmission assembly 6 includes multiple transmission gears 61, each comprising a driving gear 61a and multiple driven gears 61b. The driving gear 61a is fixedly mounted on the transmission shaft 4, and the driven gears 61b are arranged in a one-to-one correspondence with the auxiliary pumping and exhausting components 2 and are mounted on the mounting shaft 5. All driven gears 61b mesh with the driving gear 61a. Thus, rotation of the transmission shaft 4 drives the driving gear 61a, which in turn drives the driven gears 61b, ultimately driving the auxiliary pumping and exhausting components 2 connected to the driven gears 61b. The transmission assembly 6 utilizes a gear transmission structure, which facilitates the rotation of multiple auxiliary pumping and exhausting components 2 with a relatively simple transmission structure, simplifying the structure of the exhausting and exhausting device 100 and reducing costs.

[0073] In one embodiment, both the driving gear 61a and the driven gear 61b have ventilation holes 614. At least two ventilation holes 614 are spaced apart along the circumference of the corresponding driving gear 61a or driven gear 61b. The provision of ventilation holes 614 prevents the transmission gear 61 from significantly affecting the flow resistance of oil smoke, thereby improving the efficiency of oil smoke extraction. This arrangement increases the outer diameter of the transmission gear 61 while reducing its weight, thereby reducing the total load on the drive motor 13 and lowering the energy consumption required for the extraction device 100 to operate.

[0074] In one embodiment, each transmission gear 61 includes a central ring portion 611, a coaxial toothed ring portion 612 spaced apart and sleeved outside the central ring portion 611, and a hub portion 613 connected between the toothed ring portion 612 and the central ring portion 611. Multiple hub portions 613 are provided at intervals along the circumference of the central ring portion 611. This arrangement forms ventilation holes 614 between adjacent hub portions 613. Furthermore, three to six hub portions 613 are provided at intervals along the circumference of the central sleeve portion, thereby increasing the hollowing range of the driven gear 61b while ensuring the overall structural strength and rigidity of the driven gear 61b.

[0075] like Figures 9 to 11 As shown, the second end of the transmission shaft 4 has an external thread, and a fastening nut 9 is screwed onto the second end of the transmission shaft 4. The fastening nut 9 presses against the driving gear 61a, and the driving gear 61a is sandwiched between the fastening nut 9 and the mounting bracket 3 to prevent axial movement of the driving gear 61a relative to the transmission shaft 4. The cross-section of the second end of the transmission shaft 4 is preferably a D-shaped cross-section, and the center hole of the driving gear 61a is preferably a D-shaped hole adapted to the D-shaped cross-section to prevent relative rotation between the transmission shaft 4 and the driving gear 61a.

[0076] In one embodiment, the first end of the mounting shaft 5 rotates through the mounting sleeve 34 and has a first threaded section. The first threaded section is screwed with a first locking nut 7. The locking nut abuts against the side of the mounting sleeve 34 away from the auxiliary pumping and exhausting member 2, and the side of the mounting sleeve 34 away from the locking nut abuts against the driven gear 61b, thereby limiting the axial installation position of the mounting shaft 5 relative to the mounting sleeve 34.

[0077] Furthermore, a rotating bearing is sleeved on the mounting shaft 5 , and the rotating bearing is installed in the mounting sleeve portion 34 , which reduces the friction resistance when the mounting shaft 5 rotates, thereby improving the smoothness of the rotation of the auxiliary pumping and exhausting component 2 .

[0078] The second end of the mounting shaft 5 is preferably detachably connected to the auxiliary pumping member 2, thereby facilitating adjustment of the distance between the auxiliary pumping member 2 and the mounting arm 32 by adjusting the length of the mounting shaft 5, thereby improving the installation convenience and flexibility of the auxiliary pumping member 2 and improving the convenience of repairing and replacing the auxiliary pumping member 2. In other embodiments, the mounting shaft 5 and the auxiliary pumping member 2 may also be integrally provided or welded.

[0079] Furthermore, a second threaded section and a limiting shoulder are provided at the second end of the mounting shaft 5. The second threaded section passes through the auxiliary pumping and exhaust component 2 and is threaded with a second locking nut 8. The auxiliary pumping and exhaust component 2 abuts against the limiting shoulder and the second locking nut 8 respectively to limit the axial movement of the auxiliary pumping and exhaust component 2 along the mounting shaft 5, thereby ensuring the installation reliability of the auxiliary pumping and exhaust component 2 on the mounting shaft 5.

[0080] Specifically, the mounting shaft 5 includes a first shaft segment 51, a second shaft segment 52, and a third shaft segment 53, which are connected in sequence. The outer diameter of the second shaft segment 52 is larger than the outer diameters of the first shaft segment 51 and the third shaft segment 53, so that positioning stepped surfaces are formed between the second shaft segment 52 and the first shaft segment 51 and the second shaft segment 52. The outer wall of the end of the first shaft segment 51 away from the third shaft segment 53 is provided with an external thread to form a first threaded segment. The driven gear 61b is sleeved on the first shaft segment 51, with its ends respectively abutting the mounting bracket 3 and the positioning stepped surface.

[0081] The cross-sections of the first shaft section 51 and the third shaft section 53 are both D-shaped sections, and the auxiliary pumping member 2 and the driven gear 61b are both provided with D-shaped mounting shaft holes to prevent the auxiliary pumping member 2 from rotating relative to the mounting shaft 5, and to prevent the mounting shaft 5 and the driven gear 61b from rotating relative to each other, thereby reliably ensuring that the rotation of the driven gear 61b drives the auxiliary pumping member 2 to rotate.

[0082] In one embodiment, the auxiliary exhaust member 2 includes a fan, thereby simplifying the structure of the auxiliary exhaust member 2 while ensuring the generation of negative pressure, thereby reducing the overall weight and cost of the exhaust device 100. In other embodiments, the auxiliary exhaust member 2 may also include a fan or other structure capable of generating negative pressure through rotation.

[0083] Specifically, the fan includes a central cylinder 21 and blades 22, and multiple blades 22 are arranged at intervals around the central cylinder 21. The mounting shaft 5 passes through the central cylinder 21, and the bottom of the central cylinder 21 is clamped between the second locking nut 8 and one end face of the second shaft segment 52.

[0084] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0085] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A pumping device, characterized in that: include: A main fan (1), wherein the motor shaft (131) of the main fan (1) is coaxially connected to a transmission shaft (4), and the transmission shaft (4) extends out of the air inlet of the main fan (1); A mounting bracket (3) is located outside the main fan (1); Auxiliary exhaust components (2) are mounted on the mounting bracket (3) and are at least two arranged at intervals around the transmission shaft (4). The transmission shaft (4) is in transmission connection with the auxiliary exhaust components (2), so that the rotation of the motor shaft (131) drives all the auxiliary exhaust components (2) to rotate to form a negative pressure in a direction away from the air inlet of the main fan (1).

2. The extraction device according to claim 1, characterized in that The mounting bracket (3) is fixed relative to the volute (11) of the main fan (1), and the auxiliary exhaust component (2) is rotatably mounted on the mounting bracket (3). The rotation of the motor shaft (131) drives the auxiliary exhaust component (2) to rotate relative to the mounting bracket (3).

3. The extraction device according to claim 2, characterized in that: The motor shaft (131) is in transmission connection with the auxiliary pumping and exhausting member (2) via a transmission assembly (6), and the auxiliary pumping and exhausting member (2) is rotatably mounted on the mounting bracket (3) via a mounting shaft (5); The transmission assembly (6) comprises a driving gear (61a) and a driven gear (61b); the driven gear (61b) is arranged in one-to-one correspondence with the auxiliary pumping and exhausting member (2) and is sleeved on the mounting shaft (5); the driving gear (61a) is fixedly sleeved on the transmission shaft (4); and the driving gear (61a) is meshed with the driven gear (61b).

4. The extraction device according to claim 3, characterized in that: The driving gear (61a) and the driven gear (61b) both have ventilation holes (614), and at least two ventilation holes (614) are arranged at intervals along the circumference of the corresponding driving gear (61a) or the driven gear (61b).

5. The extraction device according to claim 2, characterized in that: The transmission shaft (4) rotates through the mounting bracket (3) and is connected to the auxiliary pumping and exhausting member (2) through a transmission assembly (6); the transmission assembly (6) and the auxiliary pumping and exhausting member (2) are both located on a side of the mounting bracket (3) away from the main fan (1); And / or, the mounting bracket (3) comprises a shaft sleeve portion (31) and a mounting arm portion (32), a plurality of the mounting arm portions (32) are arranged at intervals along the circumference of the shaft sleeve portion (31) and are arranged one-to-one corresponding to the auxiliary pumping and exhausting member (2), and the auxiliary pumping and exhausting member (2) is rotatably mounted on one end of the mounting arm portion (32) away from the shaft sleeve portion (31).

6. The extraction device according to claim 5, characterized in that: A fixing column (33) is protruded from the mounting arm (32), and the fixing column (33) extends in a direction toward the main fan (1). The fixing column (33) is used to connect to the volute (11) or the smoke hood (200) of the main fan (1).

7. The extraction device according to any one of claims 1 to 6, characterized in that: The auxiliary exhaust component (2) comprises a fan or a wind wheel.

8. An oil fume extraction device, comprising a fume collecting hood (200) having a fume collecting cavity (201), characterized in that: The oil fume extraction equipment further comprises an extraction device according to any one of claims 1 to 7, wherein the extraction device is installed on the smoke collecting hood (200), and at least the mounting bracket (3) and the auxiliary extraction component (2) are located in the smoke collecting chamber (201).

9. The oil fume extraction equipment according to claim 8, characterized in that: The main fan (1) is installed outside the smoke collecting hood (200), and the smoke collecting hood (200) is provided with a smoke outlet (202) that is directly connected to the air inlet of the main fan (1), and the transmission shaft (4) passes through the smoke outlet (202) and extends into the smoke collecting chamber (201).

10. The oil fume extraction equipment according to claim 9, characterized in that: The mounting bracket (3) comprises a fixed column (33) extending in a direction toward the main fan (1), a plurality of the fixed column (33) being arranged at intervals around the smoke outlet (202), and the fixed column (33) being detachably connected to the smoke collecting hood (200) or the volute (11) of the main fan (1).

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