Grease separation system and range hood

Abstract

The grease separation system comprises a shell assembly, a driving assembly, a transmission assembly and a separation assembly, the driving assembly is connected with the transmission assembly, the transmission assembly is connected with the separation assembly, and the separation assembly is arranged in an internal flow channel of the shell assembly; the separation assembly comprises a first separation part and a second separation part, and the transmission assembly is used for driving the first separation part to rotate at a first rotating speed and driving the second separation part to rotate at a second rotating speed, so that differential rotating speed output of the first separation part and the second separation part is realized when the driving assembly keeps a preset rotating speed. After receiving the preset rotating speed power of the driving assembly, the transmission assembly drives the first separation part to rotate at a first rotating speed and synchronously drives the second separation part to rotate at a higher second rotating speed, the first separation part completes preliminary separation at the matched first rotating speed, and the second separation part completes deep separation at the higher second rotating speed. The cooperation of the two ensures that the grease separation efficiency is improved under the condition that the driving assembly runs at low rotating speed.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, and in particular to a grease separation system and a range hood. Background Technology

[0002] Currently, most range hoods use centrifugal separation for grease separation. This involves a motor driving a single impeller to rotate at high speed, creating a centrifugal force field. This force throws grease particles in the oily airflow against the cavity wall and collects them in the grease collection box, achieving gas-oil separation. While this method is simple in principle, achieving the desired grease separation efficiency typically requires increasing the motor speed to 1500–2200 rpm or higher. Prolonged high-speed operation significantly increases energy consumption and operating costs. It also puts the motor under continuous high load, potentially leading to overheating, accelerated bearing wear, and ultimately shortening the overall lifespan of the machine. Furthermore, the mechanical vibration and airflow disturbance caused by high speeds generate noticeable noise, reducing the user experience. Moreover, once the speed exceeds a certain threshold, the improvement in grease separation efficiency gradually slows down, while energy consumption and noise increase significantly, creating a "high investment, low return" technical dilemma. Summary of the Invention

[0003] The embodiments of the present invention provide an oil separation system and a range hood, which solves the technical problems of high energy consumption, high noise and short service life of existing range hoods that rely on high-speed motors to achieve centrifugal oil separation.

[0004] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides an oil separation system. The oil separation system includes a housing assembly, a drive assembly, a transmission assembly, and a separation assembly. The drive assembly is connected to the transmission assembly, and the transmission assembly is connected to the separation assembly. The separation assembly is disposed within an internal flow channel of the housing assembly. The separation assembly includes a first separation member and a second separation member. The transmission assembly drives the first separation member to rotate at a first rotational speed and drives the second separation member to rotate at a second rotational speed, thereby achieving differentiated rotational speed outputs for the first and second separation members while the drive assembly maintains a preset rotational speed. The second rotational speed is greater than the first rotational speed.

[0005] In some embodiments, the transmission assembly includes a planet carrier, at least one planet gear, and a sun gear. The planet gear is rotatably mounted on the planet carrier via a planet gear drive shaft, and the planet gear meshes with the sun gear. The drive assembly is driven to the planet carrier, the sun gear is driven to the second separator, and the planet carrier is driven to the first separator.

[0006] In some embodiments, there are three planetary gears, which are evenly distributed circumferentially. All three planetary gears mesh with the sun gear, and each of the three planetary gears is mounted on the planet carrier via a corresponding planetary gear drive shaft.

[0007] In some embodiments, the second separator is connected to the sun gear via a sun gear drive shaft, the first rotational speed is consistent with the preset rotational speed of the drive assembly, the preset rotational speed of the drive assembly is 1000-1300 rpm, and the second rotational speed is 2000-2500 rpm.

[0008] In some embodiments, the number of the first separators is three, and the three first separators are arranged in a one-to-one correspondence with the three planetary gears and are all fixedly connected to the planet carrier. The three first separators are evenly distributed circumferentially within the internal area enclosed by the second separators.

[0009] In some embodiments, the grease separation system further includes a flow-guiding filter assembly disposed in the internal flow channel of the housing assembly; the flow-guiding filter assembly includes a primary filter element and a secondary filter element, the primary filter element being located at the airflow inlet of the housing assembly, and the secondary filter element being located in the flow channel between the inner sidewall of the second separator element and the outer sidewall of the first separator element.

[0010] In some embodiments, the secondary filter element is a porous mesh structure with a pore size of 1-3 mm and an open area ratio of 50-65%.

[0011] In some embodiments, the drive assembly includes a motor and a motor mounting base, the motor is fixedly mounted on the motor mounting base, the output shaft of the motor is connected to the planetary carrier of the transmission assembly, and the motor mounting base is fixedly connected to the housing assembly.

[0012] In some embodiments, both the planetary gears and the sun gear adopt a helical tooth structure, and the planetary gears, the sun gear, and the planet carrier are all made of non-metallic composite materials that are resistant to high temperatures and oil swelling.

[0013] In some embodiments, both the first separator and the second separator are centrifugal volute structures, and the wall of the second separator is provided with mesh holes for airflow to enter; the inner wall of the housing assembly is provided with an oil guide groove, which is used to collect the grease separated sequentially by the second separator and the first separator, and guide the grease to flow to the oil collection box.

[0014] In some embodiments, the primary filter element is a multi-layered interlaced honeycomb structure, and the honeycomb pore size of the primary filter element is 2-4 mm.

[0015] According to another aspect of this application, an embodiment of the present invention provides a range hood, the range hood including a range hood body and the aforementioned grease separation system, the grease separation system being fixedly installed in the internal cavity of the range hood body, and the smoke inlet of the range hood body corresponding to the airflow inlet of the housing assembly of the grease separation system.

[0016] Compared with the prior art, the grease separation system of the present invention has at least the following beneficial effects: The grease separation system provided by the present invention includes a housing assembly, a drive assembly, a transmission assembly, and a separation assembly. The drive assembly is connected to the transmission assembly, and the transmission assembly is connected to the separation assembly. The separation assembly is disposed in the internal flow channel of the housing assembly. The separation assembly includes a first separation member and a second separation member. The transmission assembly is used to drive the first separation member to rotate at a first speed and drive the second separation member to rotate at a second speed, so as to achieve differentiated speed output of the first separation member and the second separation member when the drive assembly maintains a preset speed. The second speed is greater than the first speed.

[0017] As a key structure for power transfer and speed regulation, the transmission component receives the preset speed power from the drive component and, through its own structural design, directly drives the first separating component to rotate at the first speed, while simultaneously driving the second separating component to rotate at a higher second speed. This achieves differentiated speed output under a single power input. The first and second separating components of the separation component are closely fitted into the internal flow channels of the housing component and arranged in an orderly manner according to the airflow logic. The first separating component completes the initial separation at the adapted first speed, while the second separating component completes the deep separation at the higher second speed. The synergistic effect of the two ensures that the grease separation efficiency is not reduced when the drive component operates at low speed, but is instead optimized through multi-level synergy. This avoids the drawback of existing technologies where high-speed input only results in limited separation efficiency improvement, achieving a balance between low energy consumption, low noise, long lifespan, and high efficiency.

[0018] The range hood provided by this invention is designed based on the above-mentioned grease separation system. Its beneficial effects are the same as those of the grease separation system, and will not be repeated here.

[0019] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a partial exploded view of an oil separation system provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of a secondary filter element in an oil separation system provided by an embodiment of the present invention; Figure 3 An exploded view of an oil separation system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an oil separation system provided in an embodiment of the present invention; Figure 5 A cross-sectional view of an oil separation system provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a planetary gear and a sun gear in an oil separation system provided by an embodiment of the present invention; Figure 7 A schematic diagram of the structure of a transmission component in an oil separation system provided in this embodiment of the invention; Figure 8 A schematic diagram of the structure of a planetary carrier in an oil separation system provided by an embodiment of the present invention; Figure label explanation: 1. Housing assembly; 2. Drive assembly; 21. Motor; 22. Motor mounting base; 3. Transmission assembly; 31. Planetary carrier; 32. Planetary gears; 33. Sun gear; 34. Planetary gear drive shaft; 35. Sun gear drive shaft; 4. Separation assembly; 41. First separator; 42. Second separator; 5. Flow guide filter assembly; 51. Primary filter element; 52. Secondary filter element. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0023] In the description of this invention, it should be clearly stated that the terms "first," "second," etc., in the specification, claims, and accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "rear," "left," "right," "up," "down," "horizontal," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, and are merely for the convenience of describing this invention, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this invention.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0026] Example 1 This embodiment provides an oil separation system, such as Figures 1-8 As shown, the grease separation system includes a housing assembly 1, a drive assembly 2, a transmission assembly 3, and a separation assembly 4. The drive assembly 2 is connected to the transmission assembly 3, and the transmission assembly 3 is connected to the separation assembly 4. The separation assembly 4 is disposed in the internal flow channel of the housing assembly 1. The separation assembly 4 includes a first separation element 41 and a second separation element 42. The transmission assembly 3 is used to drive the first separation element 41 to rotate at a first speed and drive the second separation element 42 to rotate at a second speed, so as to achieve differentiated speed output of the first separation element 41 and the second separation element 42 when the drive assembly 2 maintains a preset speed; wherein, the second speed is greater than the first speed.

[0027] The housing assembly 1 serves as the installation foundation and airflow guiding core of the entire grease separation system. Its internal structure forms a dedicated flow channel for the smooth flow of oily fumes, providing a stable installation cavity for the separation assembly 4 and guiding the airflow through the separation components along a preset path. It also protects all internal components from direct erosion by oily fumes or interference from external factors. It is relatively fixed to the drive assembly 2 through a compatible installation structure, ensuring that the drive assembly 2 will not shift during operation. The drive assembly 2 is the system's power output source, establishing a stable power connection with the transmission assembly 3. This connection ensures that the power output from the drive assembly 2 is transmitted to the transmission assembly 3 without loss and stably. The transmission assembly 3, as a key structure for power transfer and speed regulation, is compactly arranged between the drive assembly 2 and the separation assembly 4. It does not occupy too much flow channel space to obstruct airflow and shortens the power transmission path to improve efficiency. More specifically, the transmission assembly 3 forms a direct transmission connection with the first separation component 41 of the separation assembly 4. Through its structural design, it achieves power distribution, simultaneously driving the second separation component 42 to rotate while driving the first separation component 41, and strictly ensuring that the second speed is greater than the first speed. The first separator 41 and the second separator 42 of the separation assembly 4 are both tightly fitted into the internal flow channel of the housing assembly 1 and arranged in an orderly manner according to the airflow logic to ensure that the airflow can fully cover the working area of ​​the two separators. The first separator 41 rotates at a first speed to perform preliminary separation of grease particles with larger particle size or easy separation in the airflow. The second separator 42 rotates at a higher second speed to perform deep separation of fine grease particles remaining in the airflow. The two work together to achieve multi-stage efficient separation. The power output end of the drive assembly 2 is precisely aligned with the transmission assembly 3 to ensure the coaxiality and stability of power transmission, further ensuring the rotational stability of the two separators.

[0028] After the drive component 2 is started, it runs stably at the preset speed. The power output of the drive component 2 is completely transmitted to the transmission component 3 through direct connection with the transmission component 3. After receiving the power, the transmission component 3 starts working immediately. With its own structural design, it directly transmits the power to the first separator 41, driving the first separator 41 to rotate at a constant speed of the first speed. At the same time, it synchronously drives the second separator 42 to rotate at a high speed of the second speed, which is greater than the first speed. The speed difference between the two is always maintained to meet the multi-stage separation requirements. The oil fume airflow enters the internal flow channel through the airflow inlet of the housing assembly 1. Guided by the housing assembly 1, it flows smoothly along the preset path to the separation assembly 4. First, it makes full contact with the first separator 41. Under the centrifugal action of the first separator 41, some oil particles in the airflow are thrown away from the airflow and adhere to the corresponding structural surface. Then, the airflow continues to flow to the second separator 42. Under the stronger centrifugal force generated by the higher speed of the second separator 42, the remaining oil particles in the airflow are completely separated. Throughout the entire operation, the housing assembly 1 continuously guides the airflow to maintain a stable flow direction, preventing airflow leakage or backflow that would reduce the separation efficiency. The drive assembly 2 always maintains the preset speed to output power, providing continuous support for the operation of the entire system. The transmission assembly 3 stably transmits power and precisely controls the speed difference between the first separator 41 and the second separator 42, ensuring that the centrifugal action of the two separators can be effectively connected and work together to ultimately achieve efficient separation of oil in the oil fume airflow.

[0029] The core technical problem described in the background technology is that existing range hoods require high-speed operation of the drive motor to achieve the expected grease separation efficiency, leading to a significant increase in energy consumption, noticeable operating noise, shortened motor life, and a "high investment, low return" dilemma where the improvement in separation efficiency is disproportionate to the investment. The grease separation system of this embodiment successfully solves this problem through the cooperation of the housing component 1, drive component 2, transmission component 3, and separation component 4. Specifically, the drive component 2, as the power output source of the system, does not need to be increased to a high speed of 1500-2200 rpm as in the prior art, but instead maintains a preset speed. This design directly reduces the power consumption of the drive component 2, reduces the temperature rise caused by high-load operation of the drive component 2, and reduces the wear of internal bearings and other components, thereby significantly extending the service life of the drive component 2 and even the entire grease separation system. At the same time, the preset speed operation avoids the severe mechanical vibration and airflow disturbance caused by high speed, resulting in a significant reduction in system operating noise and improving the user experience. More importantly, the transmission component 3, as a key structure for power transfer and speed regulation, receives the preset speed power from the drive component 2 and directly drives the first separator 41 to rotate at the first speed through its own structural design. At the same time, it synchronously drives the second separator 42 to rotate at a higher second speed, realizing differentiated speed output under a single power input. The first separator 41 and the second separator 42 of the separator component 4 are closely fitted into the internal flow channel of the housing component 1 and arranged in an orderly manner according to the airflow logic. The first separator 41 completes the initial separation at the adapted first speed, and the second separator 42 completes the deep separation at the higher second speed. The synergistic effect of the two ensures that the grease separation efficiency is not reduced when the drive component 2 is running at low speed. Instead, it is optimized through multi-level synergy, avoiding the drawback of the existing technology where high speed input only results in limited separation efficiency improvement. It achieves a unity of low energy consumption, low noise, long life and high efficiency.

[0030] In a specific embodiment, such as Figures 1-3 As shown, the transmission assembly 3 includes a planet carrier 31, at least one planet gear 32, and a sun gear 33. The planet gear 32 is rotatably mounted on the planet carrier 31 via a planet gear transmission shaft 34, and the planet gear 32 meshes with the sun gear 33. The drive assembly 2 is drivenly connected to the planet carrier 31, the sun gear 33 is drivenly connected to the second separator 42, and the planet carrier 31 is drivenly connected to the first separator 41.

[0031] The sun gear 33 is located at the center of the transmission assembly 3. At least one planet gear 32 is evenly arranged around the sun gear 33. The planet carrier 31 serves as the load-bearing core and is rotatably connected to each planet gear 32 through the planet gear transmission shaft 34. This connection method ensures that the planet gear 32 can rotate flexibly and can move synchronously with the planet carrier 31. More specifically, the teeth of the planet gear 32 are fully meshed with the teeth of the sun gear 33 to form a tight power transmission fit. The power input end of the planet carrier 31 is fixedly connected to the drive assembly 2, and the output end of the sun gear 33 is connected to the second separator 42. The planet carrier 31 itself is also directly connected to the first separator 41. As a key component for speed amplification, the sun gear 33 converts power into higher speeds and transmits them to the second separator 42 through meshing with the planet gears 32. The planet gears 32 act as a bridge for power transfer and speed regulation. On the one hand, they receive the power transmitted from the planet carrier 31 and drive their own rotation. On the other hand, they drive the sun gear 33 to rotate at high speed through meshing, achieving a step-by-step increase in speed. The planet carrier 31 undertakes the dual functions of power carrying and distribution. It receives the original power output from the drive component 2 and transmits the power evenly to each planet gear 32 through the planet gear transmission shaft 34. At the same time, it directly drives the first separator 41 to rotate, ensuring that the power can be reasonably distributed to the two separators.

[0032] After the drive component 2 is started, it drives the planet carrier 31 to rotate at a preset speed. The planet carrier 31 drives at least one planet gear 32 to revolve around the sun gear 33 through the planet gear transmission shaft 34. At the same time, since the planet gear 32 and the sun gear 33 are in a meshing state, the planet gear 32 will generate a rotational motion during the revolution. Furthermore, the rotation of the planet gear 32 directly drives the sun gear 33 to rotate through the meshing of the gear teeth, and the rotational speed of the sun gear 33 is higher than the rotational speed of the planet carrier 31, forming a speed amplification effect. This coordination method enables stable power transmission and precise distribution. The planetary carrier 31 transmits the power of the drive assembly 2 to both the planetary gears 32 and the first separator 41, allowing the first separator 41 to operate at a first speed consistent with the speed of the planetary carrier 31. Meanwhile, the planetary gears 32 drive the sun gear 33 to operate at a higher second speed through meshing, thereby driving the second separator 42 to rotate. Ultimately, this achieves differentiated speed output under a single power input. This coordination not only ensures minimal power loss during power transmission but also maintains a stable speed match between the first separator 41 and the second separator 42, providing reliable power support for the multi-stage grease separation of the separation assembly 4. At the same time, the components mesh tightly and operate smoothly throughout the entire transmission process, avoiding power transmission interruptions or speed fluctuations.

[0033] In a specific embodiment, such as Figure 6 and Figure 7As shown, there are three planetary gears 32, which are evenly distributed in the circumference. All three planetary gears 32 mesh with the sun gear 33, and the three planetary gears 32 are respectively mounted on the planet carrier 31 through the corresponding planetary gear drive shafts 34.

[0034] Three planetary gears 32 are evenly distributed around the sun gear 33 in a circumferential direction, with the spacing between any two adjacent planetary gears 32 remaining consistent. This uniform arrangement ensures that the meshing position and meshing depth of each planetary gear 32 with the sun gear 33 are exactly the same. More specifically, each planetary gear 32 is equipped with a dedicated planetary gear drive shaft 34. These planetary gear drive shafts 34 form a one-to-one connection with the planet carrier 31, securing and rotatably mounting the three planetary gears 32 onto the planet carrier 31. This ensures that each planetary gear 32 can not only rotate flexibly around its own planetary gear drive shaft 34, but also revolve synchronously around the sun gear 33 with the planet carrier 31. All three planetary gears 32 are tightly meshed with the sun gear 33. Compared with single or non-uniformly distributed planetary gear designs, this multi-gear simultaneous meshing structure allows the power received by the planet carrier 31 from the drive assembly 2 to be evenly distributed to each planetary gear 32, avoiding excessive transmission load on a single planetary gear 32 and effectively reducing the wear rate of components. At the same time, the presence of multiple meshing points makes the power transmission process more continuous and uninterrupted, reducing speed fluctuations. The circumferentially evenly distributed layout can balance the force on the planet carrier 31, preventing it from vibrating or shifting due to unilateral force during operation, ensuring the smooth operation of the entire transmission assembly 3. This allows the sun gear 33 to obtain a stable and uniformly amplified speed, providing reliable power support for the differentiated speed output of the separation assembly 4. It also extends the overall service life of the planetary gears 32, sun gear 33, and planet carrier 31, reducing the frequency and cost of subsequent maintenance.

[0035] In a specific embodiment, the second separator 42 is connected to the sun gear 33 via the sun gear drive shaft 35. The first rotational speed is consistent with the preset rotational speed of the drive assembly 2, which is 1000-1300 rpm and the second rotational speed is 2000-2500 rpm.

[0036] One end of the sun gear drive shaft 35 is securely connected to the sun gear 33, while the other end is directly connected to the second separator 42. This direct and precise connection ensures that the power generated by the rotation of the sun gear 33 is smoothly transmitted to the second separator 42, allowing the rotational speed of the second separator 42 to completely synchronize with the rotational speed of the sun gear 33, avoiding any delay in power transmission or speed attenuation. More specifically, the first rotational speed of the first separator 41 is completely consistent with the preset rotational speed of the drive assembly 2, which is limited to a reasonable range of 1000-1300 rpm. This speed provides sufficient power for the first separator 41 to complete the initial separation work while keeping the drive assembly 2 in a low-load operating state. The second rotational speed of the second separator 42 is amplified to 2000-2500 rpm through the speed amplification effect of the transmission assembly 3. This speed generates a sufficiently strong centrifugal force to meet the deep separation requirements of fine grease particles. Unlike existing technologies, the drive component 2 does not need to operate at high speeds of over 1500 rpm. Low-speed operation not only significantly reduces energy consumption and operating costs, but also effectively avoids problems such as excessive temperature rise and accelerated bearing wear caused by long-term high loads, thus significantly extending the service life of the drive component 2. At the same time, the mechanical vibration and airflow disturbance caused by low speed are greatly reduced, and the operating noise is significantly reduced, improving the user experience. Meanwhile, the high speed of the second separator 42 ensures the efficiency of grease separation. The matching speed of the first separator 41 and the high speed of the second separator 42 work together to enable the entire separation component 4 to achieve efficient connection from initial separation to deep separation even when the drive component 2 is operating at low speed. This successfully meets the dual requirements of low energy consumption, low noise, and high separation efficiency.

[0037] In a specific embodiment, such as Figure 1 As shown, there are three first separation components 41. The three first separation components 41 are arranged in a one-to-one correspondence with the three planetary gears 32, and are all fixedly connected to the planet carrier 31. The three first separation components 41 are evenly distributed circumferentially within the internal area enclosed by the second separation components 42.

[0038] The three first separators 41 are arranged in a one-to-one correspondence with the three planetary gears 32. Each first separator 41 is firmly and fixedly connected to the planet carrier 31. This corresponding connection method allows the power transmitted by the planet carrier 31 to be directly and evenly applied to each first separator 41, ensuring that the three first separators 41 can rotate synchronously with the planet carrier 31, without any single separator having insufficient power or inconsistent rotation speed. The three first separators 41 are evenly distributed circumferentially within the internal area enclosed by the second separator 42, with the distance between adjacent first separators 41 remaining consistent. This ensures that the internal space of the second separator 42 is fully utilized, allowing the airflow to fully and evenly contact the working area of ​​each first separator 41 after entering the second separator 42, avoiding the problem of incomplete separation caused by dead airflow. This one-to-one and evenly distributed design makes the force on the planetary carrier 31 more balanced, and will not cause vibration or offset due to uneven load on a single first separator 41. This ensures the smooth operation of the entire transmission assembly 3 and the separation assembly 4. At the same time, the three first separators 41 work synchronously, which is equivalent to expanding the effective area of ​​the initial separation. This allows for faster and more efficient processing of grease particles in the airflow, reducing the separation pressure on the subsequent second separator 42 and making the entire separation process smoother. Combined with the high-speed deep separation of the second separator 42, the grease separation efficiency of the entire system is further improved.

[0039] In a specific embodiment, such as Figure 3 As shown, the grease separation system further includes a flow guiding filter assembly 5, which is disposed in the internal flow channel of the housing assembly 1. The flow guiding filter assembly 5 includes a primary filter element 51 and a secondary filter element 52. The primary filter element 51 is located at the airflow inlet of the housing assembly 1, and the secondary filter element 52 is located in the flow channel between the inner sidewall of the second separator 42 and the outer sidewall of the first separator 41.

[0040] The flow-guiding filter assembly 5 is integrally fitted and installed in the internal flow channel of the housing assembly 1. This design avoids occupying too much flow channel space and affecting the smooth flow of air, while precisely positioning itself on the airflow path to fully exert its filtering and guiding functions. More specifically, the primary filter element 51 is fixed at the airflow inlet of the housing assembly 1, precisely intercepting the oil fume airflow entering from the inlet. This effectively blocks larger impurities mixed in the airflow, preventing these impurities from directly entering the separation assembly 4 and affecting the normal rotation of the first separator 41 and the second separator 42. It also reduces the scratching and wear of impurities on the surface of the separators. Furthermore, the secondary filter element 52 is precisely arranged in the flow channel between the inner wall of the second separator 42 and the outer wall of the first separator 41. This position is exactly in the transition area where the airflow flows from the second separator 42 to the first separator 41. It can not only filter the airflow after the initial treatment by the second separator 42, intercepting residual fine impurities and some oil droplets, but also guide the airflow to be evenly distributed through its own structure, so that the airflow can smoothly and comprehensively contact the working area of ​​the first separator 41, avoiding separation dead zones caused by airflow turbulence. At the same time, the staged filtration design of the primary filter element 51 and the secondary filter element 52 gradually reduces the separation load of the separation component 4, allowing the first separator 41 and the second separator 42 to focus more on the centrifugal separation of oil particles, improving the overall separation efficiency, and extending the service life of the separation component 4, ensuring the long-term stable operation of the entire oil separation system.

[0041] In a specific embodiment, the secondary filter element 52 has a porous mesh structure with a pore size of 1-3 mm and an open area ratio of 50-65%.

[0042] The secondary filter element 52 adopts a porous mesh structure. This structure forms evenly distributed air passages, ensuring smooth airflow while providing sufficient contact area for filtration. More specifically, the mesh pore size of the secondary filter element 52 is set at 1-3mm. This size is just right to intercept fine impurities and some undispelled oil droplets remaining after the initial separation by the second separator 42. It avoids airflow obstruction and velocity reduction due to excessively small pore size, and also prevents loss of filtration effectiveness due to excessively large pore size. Furthermore, the porosity is controlled within a reasonable range of 50-65%. This ratio ensures sufficient mesh wall surface to capture impurities and oil droplets for effective secondary filtration, while allowing most of the airflow to pass smoothly, avoiding excessive airflow resistance and ensuring the ventilation efficiency of the entire internal flow channel without affecting the normal operation of the first separator 41 and the second separator 42. This combination of structure and parameters allows the secondary filter element 52 to maintain a stable airflow while performing secondary filtration and further purifying the airflow. This ensures that the airflow flows evenly to the first separator element 41, guaranteeing that each working area of ​​the first separator element 41 is exposed to a stable airflow. This improves the uniformity and efficiency of the separation, while effectively preventing impurities from entering the first separator element 41 and causing wear or blockage. This extends the service life of the first separator element 41 and makes the entire grease separation system operate more stably and efficiently.

[0043] In a specific embodiment, such as Figure 1 As shown, the drive assembly 2 includes a motor 21 and a motor mounting base 22. The motor 21 is fixedly mounted on the motor mounting base 22. The output shaft of the motor 21 is connected to the planetary carrier 31 of the transmission assembly 3. The motor mounting base 22 is fixedly connected to the housing assembly 1.

[0044] The motor mounting base 22 of the drive assembly 2 is fixedly connected to the housing assembly 1. This connection provides a reliable mounting foundation for the entire drive assembly 2, ensuring that the drive assembly 2 maintains a relatively fixed position with the housing assembly 1 throughout the entire system operation, and will not shift due to vibration or power transmission. The motor 21 is fixed on the motor mounting base 22, which effectively disperses the vibration generated by the motor 21 during operation, reducing the transmission of vibration to the housing assembly 1 and other components. It also provides stable support for the motor 21, preventing it from becoming loose due to its own weight or operating load. The output shaft of the motor 21 is connected to the planetary carrier 31 of the transmission assembly 3. This connection allows the power output by the motor 21 to be directly and smoothly transmitted to the planetary carrier 31, reducing power loss during transmission and ensuring that the planetary carrier 31 can rotate stably with the preset speed of the motor 21. This overall structural design makes the operation of the drive component 2 more stable. The low-speed operation of the motor 21, combined with the stable installation and precise transmission, not only reduces the operating noise, but also avoids speed fluctuations caused by unstable installation or power transmission deviation. It provides stable power guarantee for the speed adjustment of the transmission component 3 and the differentiated speed output of the separation component 4, while reducing the wear of the motor 21 and connecting parts.

[0045] In a specific embodiment, such as Figure 6 and Figure 7 As shown, both the planetary gear 32 and the sun gear 33 adopt a helical tooth structure, and the planetary gear 32, the sun gear 33 and the planet carrier 31 are made of non-metallic composite materials that are resistant to high temperature and oil swelling.

[0046] Both planetary gear 32 and sun gear 33 employ helical gear structures. Compared to ordinary spur gear designs, this structure allows for a larger contact area during meshing, resulting in a smoother and more stable meshing process. It eliminates the impact sensation experienced with spur gear meshing. The meshing between helical gears is progressive, with the gears gradually entering and disengaging, effectively reducing vibration and noise during transmission. This ensures more continuous and stable power transmission and avoids speed fluctuations. Planetary gear 32, sun gear 33, and planet carrier 31 are all made of high-temperature resistant and oil-swell-resistant non-metallic composite materials. This material can withstand the high-temperature conditions of oil fume environments and will not deform or degrade in performance due to prolonged exposure to high temperatures. It also resists the erosion of grease in oil fumes, preventing dimensional changes or structural loosening caused by oil swelling, ensuring the long-term stability of the fit precision of each component. This combination of structure and materials allows the transmission component 3 to maintain good meshing and transmission efficiency during long-term operation, reducing wear on parts and extending service life. At the same time, the smooth transmission process reduces overall operating noise, which, together with the low-speed operation of the drive component 2, further improves the operational stability of the entire grease separation system.

[0047] In a specific embodiment, both the first separator 41 and the second separator 42 are centrifugal volute structures. The wall of the second separator 42 is provided with mesh holes for airflow to enter. The inner wall of the housing assembly 1 is provided with an oil guide groove, which is used to collect the grease that has been separated sequentially by the second separator 42 and the first separator 41, and guide the grease to flow to the oil collection box.

[0048] Both the first separator 41 and the second separator 42 are centrifugal volute structures, capable of generating a stable and concentrated centrifugal force field during rotation. This allows the flowing oil fume airflow to quickly separate grease from air under centrifugal force. More specifically, the shape design of the centrifugal volute allows the airflow to flow smoothly along the shell wall, improving airflow efficiency and making it easier for grease particles to be thrown towards the shell wall under centrifugal force, preventing grease accumulation inside the separator. The second separator 42 has mesh openings on its wall for airflow entry. These mesh openings are evenly distributed on the wall, guiding the oil fume airflow evenly into the interior of the second separator 42, ensuring more thorough contact between the airflow and the second separator 42, allowing the centrifugal separation effect to cover every stream of airflow, and improving the comprehensiveness of the initial separation. Furthermore, the inner wall of the housing assembly 1 is provided with an oil guide groove. The oil guide groove is arranged along the inner wall of the housing assembly 1, which can accurately receive the grease dripping from the shell walls of the second separator 42 and the first separator 41, preventing the grease from flowing randomly and contaminating other parts or flowing back into the airflow. At the same time, the structural design of the oil guide groove can guide the grease to flow smoothly along the preset path to the oil collection box, so as to achieve centralized collection of grease.

[0049] In a specific embodiment, the primary filter element 51 has a multi-layered interlaced honeycomb structure, and the honeycomb pore size of the primary filter element 51 is 2-4 mm.

[0050] The primary filter element 51 adopts a multi-layered staggered honeycomb structure. This structure, through the staggered arrangement of multiple honeycomb layers, forms a three-dimensional filtration barrier at the airflow inlet of the housing component 1. Compared with a single-layer structure, it can significantly increase the contact area with the oil fume airflow, allowing more opportunities to intercept impurities and large oil droplets in the airflow. The multi-layered staggered design extends the airflow path through the filter element, making it easier for impurities to be adsorbed by the honeycomb walls during airflow, avoiding the filtration leakage problem caused by a single channel. The honeycomb pore size of the primary filter element 51 is set at 2-4mm. This size can accurately block food residue, larger dust particles, and larger oil droplets mixed in the oil fume, preventing these impurities from entering the subsequent separation component 4, avoiding interference with the rotation of the first separation component 41 and the second separation component 42, reducing the risk of scratch wear and mesh blockage on the surface of the separation component, and also preventing excessive airflow obstruction due to the pore size being too small, ensuring that the airflow can smoothly enter the internal flow channel and maintain the ventilation efficiency of the entire system. This combination of structure and pore size allows the primary filter element 51 to perform efficient pre-filtration without affecting the normal flow of air, effectively reducing the workload of the subsequent secondary filter element 52 and separation component 4. This allows the separation component 4 to focus more on the centrifugal separation of fine oil particles, thereby improving the overall oil separation efficiency.

[0051] The working process of the grease separation system provided in Example 1 is as follows: The oil fume airflow first enters through the airflow inlet of the housing assembly 1. After preliminary filtration by the primary filter element 51, it can effectively intercept food residue, large dust particles, and large-diameter oil droplets mixed in the airflow, preventing these impurities from entering subsequent components and causing interference or wear. The airflow then continues to flow to the second separator 42. The wall of the second separator 42 has evenly distributed mesh holes to guide the airflow evenly into its interior. At this time, the motor 21 of the drive assembly 2 starts and runs stably at a preset speed of 1000-1300 rpm. The motor 21 is fixedly connected to the housing assembly 1 through the motor mounting base 22. It runs smoothly with little vibration. Its output shaft is precisely connected to the planetary carrier 31 of the transmission assembly 3, stably transmitting power to the planetary carrier 31. Three planetary gears 32, evenly distributed circumferentially, are mounted on the planetary carrier 31 via three planetary gear drive shafts 34. Each planetary gear 32 meshes tightly with the central sun gear 33, forming a planetary gear speed-increasing mechanism. With a preset gear ratio of 1:2.5-1:3.2, the rotation of the planetary carrier 31 drives the planetary gears 32 to both revolve around the sun gear 33 and rotate on their own axes, thereby driving the sun gear 33 to rotate at a higher speed. The sun gear 33 is connected to the second separator 42 via a sun gear drive shaft 35, transmitting the increased power to the second separator 42, causing it to rotate at a high speed of 2000-2500 rpm. As a centrifugal volute structure, the second separator 42 generates a centrifugal acceleration of up to 1500-2000g, deeply capturing 1-20μm fine oil mist in the airflow and efficiently separating most of the fine oil particles. Simultaneously, the planetary carrier 31 is directly and fixedly connected to three first separators 41 that are circumferentially and evenly distributed inside the second separator 42, driving the three first separators 41 to rotate at a first speed consistent with the preset speed of the motor 21. The first separators 41 are also centrifugal volute structures, further separating the small amount of grease particles remaining after the initial separation by the second separators 42. As the airflow flows from the second separators 42 to the first separators 41, it passes through a secondary filter 52 located in the flow channel between the two, which can intercept residual fine impurities and some oil droplets, while rectifying the airflow to ensure that the airflow flows smoothly and evenly to the first separators 41. The separated grease particles will adhere to the shell walls of the first separators 41 and the second separators 42, and then drip into the oil guide groove provided on the inner wall of the shell assembly 1. The oil guide groove guides the grease to flow smoothly to the oil collection box for centralized collection.Throughout the transmission process, planetary gears 32 and sun gear 33 adopt helical gear structures and are made of non-metallic composite materials that are resistant to high temperatures (not less than 180℃) and oil swelling, along with planet carrier 31. Their density is only one-third that of metals, which reduces the overall weight and allows them to adapt to the high temperature and grease corrosion of the oil fume environment. This ensures that the transmission component 3 operates smoothly, with minimal wear and low noise. Combined with the low-speed operation of the drive component 2, this achieves efficient grease separation while significantly reducing energy consumption and operating noise, and extending the service life of the entire grease separation system.

[0052] Example 2 This embodiment provides a range hood, which includes a range hood body and the grease separation system described in Embodiment 1. The grease separation system is fixedly installed in the internal cavity of the range hood body, and the smoke inlet of the range hood body is correspondingly arranged with the airflow inlet of the shell assembly 1 of the grease separation system.

[0053] In this embodiment, the grease separation system is securely installed inside the main body of the range hood. This not only makes full use of the installation space inside the main body of the range hood, but also allows the grease separation system to form a tight integrated structure with the main body of the range hood, avoiding relative displacement caused by vibration during operation and thus preventing it from affecting the performance.

[0054] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fat separation system, characterized by The grease separation system includes a housing assembly, a drive assembly, a transmission assembly, and a separation assembly. The drive assembly is connected to the transmission assembly, the transmission assembly is connected to the separation assembly, and the separation assembly is disposed in the internal flow channel of the housing assembly. The separation assembly includes a first separation member and a second separation member. The transmission assembly is used to drive the first separation member to rotate at a first speed and drive the second separation member to rotate at a second speed, so as to achieve differentiated speed output of the first separation member and the second separation member when the driving assembly maintains a preset speed; wherein the second speed is greater than the first speed.

2. The oil separation system according to claim 1, characterized in that, The transmission assembly includes a planet carrier, at least one planet gear, and a sun gear. The planet gear is rotatably mounted on the planet carrier via a planet gear drive shaft, and the planet gear meshes with the sun gear. The drive assembly is driven to the planet carrier, the sun gear is driven to the second separator, and the planet carrier is driven to the first separator.

3. The grease separation system according to claim 2, characterized in that, The planetary gears are three in number and are evenly distributed circumferentially. All three planetary gears mesh with the sun gear, and each of the three planetary gears is mounted on the planet carrier in a one-to-one correspondence via a corresponding planetary gear drive shaft.

4. The grease separation system according to claim 2, characterized in that, The second separator is connected to the sun gear via a sun gear drive shaft. The first rotational speed is consistent with the preset rotational speed of the drive assembly. The preset rotational speed of the drive assembly is 1000-1300 rpm, and the second rotational speed is 2000-2500 rpm.

5. The grease separation system according to claim 4, characterized in that, The number of the first separation components is three, and the three first separation components are arranged in a one-to-one correspondence with the three planetary gears, and are all fixedly connected to the planet carrier. The three first separation components are evenly distributed circumferentially within the internal area enclosed by the second separation components.

6. The grease separation system according to claim 1, characterized in that, The grease separation system further includes a flow guiding filter assembly, which is disposed in the internal flow channel of the housing assembly; the flow guiding filter assembly includes a primary filter element and a secondary filter element, the primary filter element is located at the airflow inlet of the housing assembly, and the secondary filter element is located in the flow channel between the inner sidewall of the second separator element and the outer sidewall of the first separator element.

7. The grease separation system according to claim 6, characterized in that, The secondary filter element has a porous mesh structure with a pore size of 1-3 mm and an open area ratio of 50-65%.

8. The grease separation system according to claim 2, characterized in that, The drive assembly includes a motor and a motor mounting base. The motor is fixedly mounted on the motor mounting base, and the output shaft of the motor is connected to the planetary carrier of the transmission assembly. The motor mounting base is fixedly connected to the housing assembly.

9. The grease separation system according to claim 2, characterized in that, Both the planetary gears and the sun gear adopt a helical tooth structure, and the planetary gears, sun gears, and planet carriers are all made of non-metallic composite materials that are resistant to high temperature and oil swelling.

10. The oil separation system according to claim 5, characterized in that, Both the first separator and the second separator are centrifugal volute structures. The wall of the second separator is provided with mesh holes for airflow to enter. The inner wall of the housing assembly is provided with an oil guide groove, which is used to collect the grease that has been separated sequentially by the second separator and the first separator, and guide the grease to flow to the oil collection box.

11. The grease separation system according to claim 6, characterized in that, The primary filter element has a multi-layered interlocking honeycomb structure, and the honeycomb pore size of the primary filter element is 2-4mm.

12. A range hood, characterized in that, The range hood includes a range hood body and a grease separation system as described in any one of claims 1-11. The grease separation system is fixedly installed in the internal cavity of the range hood body, and the smoke inlet of the range hood body is correspondingly arranged with the airflow inlet of the shell assembly of the grease separation system.

Images