Oil guide structure of range hood

Abstract

An oil guide structure of a range hood comprises a shell, an oil guide pipe, an oil guide pipe, a first oil guide pipe, a second oil guide pipe, a first oil guide pipe and a second oil guide pipe, and the shell is provided with a front-end opening and a top opening; the smoke collecting cavity is installed in the shell, the front end of the smoke collecting cavity is in butt joint with an opening in the front end of the shell to form a smoke inlet, and an oil filter screen is arranged in the smoke collecting cavity; the top plate seals the top opening of the shell, and a butt joint area used for installing a fan assembly is arranged on the top plate; the left baffle plate and the right baffle plate are respectively mounted on the left side and the right side of the rear part of the smoke collecting cavity, and the edges of the left baffle plate and the right baffle plate are respectively propped against the smoke collecting cavity, the top plate and the rear wall of the shell, so that a closed oil smoke channel is formed behind the smoke collecting cavity. The range hood has the beneficial effects that a relatively independent oil collecting cavity is skillfully enclosed at the lower part of the range hood; and the oil stain is effectively prevented from flowing around to pollute a large-area area in the whole range hood.

Description

Technical Field

[0001] This invention relates to the field of range hood technology, specifically to an oil guiding structure for a range hood. Background Technology

[0002] Range hoods are essential appliances in modern kitchens. Their main function is to quickly draw in cooking fumes and exhaust them outdoors using a fan system, thus maintaining a clean kitchen environment. During the process of drawing in and expelling the fumes, grease particles in the fumes condense into oil due to cooling and collision. Efficiently collecting this oil and smoothly guiding it into the oil cup is a crucial aspect of range hood design, directly impacting its working efficiency, lifespan, and the user's cleaning and maintenance experience.

[0003] Currently, range hoods on the market have many shortcomings in their internal oil guiding structure design, specifically in the following aspects: 1. Traditional range hoods are typically constructed from multiple sheet metal parts connected by welding or screws, resulting in numerous seams, steps, and irregular corners. For example, the connections between components such as the smoke collection chamber, fan housing, and internal support parts are often not smooth transitions. When high-speed airflow carrying oil droplets passes through these nooks and crannies, the oil droplets easily adhere and accumulate, forming stubborn grease that is difficult to clean. Users cannot reach these complex internal structures during routine cleaning. Over time, the accumulated grease not only breeds bacteria and produces odors but also drips due to gravity, causing secondary pollution.

[0004] 2. To achieve specific functions or support structures, existing range hoods often incorporate numerous baffles, ribs, or unnecessary partitions. These components significantly increase the total surface area along the oil fume flow path. On one hand, the excessive surface area provides more "landing points" for oil droplets to condense and adhere, resulting in more oil remaining inside the machine rather than entering the oil cup. On the other hand, these complex internal components obstruct airflow, increasing the overall wind resistance of the duct. Increased wind resistance forces the fan to operate at higher power consumption to achieve the rated exhaust volume, reducing the range hood's energy efficiency ratio and potentially leading to a decrease in smoke extraction efficiency due to poor airflow.

[0005] 3. Existing technology does not optimize the oil flow path. After condensation on the filter screen and the walls of the smoke collection chamber, the oil's flow direction often relies on gravity and random surface diffusion, lacking a centralized, smooth, and unobstructed oil guiding channel. During its downward flow, the oil may be interrupted or accumulate due to the aforementioned seams, steps, or horizontal surfaces, or even be dispersed by airflow disturbances. This not only prevents the oil from efficiently collecting in the oil collection chamber and oil cup, but also easily leads to dripping and leakage when there is excessive local oil accumulation, directly dripping onto the stove or food, severely impacting the user experience. Therefore, further improvements are necessary. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an oil guiding structure for range hoods that is simple in structure, low in manufacturing cost, smooth in interior, effectively reduces dead corners for oil accumulation, lowers wind resistance, and enables smooth oil flow.

[0007] The objective of this invention is achieved in the following way: an oil guiding structure for a range hood, comprising: The housing has a front opening and a top opening, and the lower front part of the housing is provided with an oil cup groove for installing an oil cup. A smoke collection chamber is installed inside the housing. The front end of the smoke collection chamber is connected to the front opening of the housing to form a smoke inlet. An oil filter screen is provided inside the smoke collection chamber. A top plate that closes the top opening of the housing, and the top plate is provided with a docking area for installing the fan assembly; The left and right baffles are respectively installed on the left and right sides behind the smoke collection chamber. The edges of the left and right baffles abut against the smoke collection chamber, the top plate and the rear wall of the shell, respectively, to form a closed fume channel behind the smoke collection chamber. An oil guide plate is installed below the smoke collection chamber; An oil trough plate is installed below the oil guide plate. The oil trough plate, together with the oil guide plate, the rear wall of the housing, the left baffle and the right baffle, forms an oil collection cavity. The oil collecting chamber has an oil drain port that communicates with the oil cup groove, which can guide the oil in the oil collecting chamber into the oil cup installed in the oil cup groove.

[0008] Furthermore, it also includes a front panel hinged to the front end of the housing; a left mounting cavity is formed between the left baffle and the left side wall of the housing, and a right mounting cavity is formed between the right baffle and the right side wall of the housing; a door hinge is installed in both the left mounting cavity and the right mounting cavity, and the door hinge rotatably connects the front panel to the housing.

[0009] Further: the front panel includes an upper panel disposed outside the smoke inlet and a lower panel disposed outside the oil cup groove; the door hinge includes: Upper door hinges are respectively installed in the left mounting cavity and the right mounting cavity, and the upper door hinges are connected to the upper panel through the upper clearance groove provided at the front end of the housing; The lower door hinges are respectively installed in the left mounting cavity and the right mounting cavity, and the lower door hinges are connected to the lower panel through the lower clearance groove provided at the front end of the housing.

[0010] Furthermore: the bottom of the smoke collection chamber extends backward and downward to form a concave guide area, the oil filter screen is disposed at the top of the guide area, and the bottom of the guide area is provided with a guide port communicating with the oil collection chamber.

[0011] Furthermore, a boss is formed by upward pressing inside the smoke collection chamber, and the oil filter screen is disposed on the boss.

[0012] Furthermore, the oil filter screen is composed of several through grooves formed by stamping on the smoke collection chamber, and the periphery of each through groove extends upward integrally to form a baffle ring.

[0013] Furthermore, an oil level sensor is provided in the oil cup groove, and the oil level sensor has terminals for electrical connection.

[0014] Furthermore: the oil cup is made of a transparent material; it also includes a lower panel, which is disposed outside the oil cup groove and has an observation window at the position corresponding to the oil cup.

[0015] Furthermore, the front of the oil cup is recessed to form a handle groove.

[0016] The beneficial effects of this invention are: 1. Simple structure, low manufacturing cost, and improved market competitiveness.

[0017] 4. This invention cleverly uses the precise coordination of components such as the left baffle, right baffle, oil guide plate, and oil trough plate to form a relatively independent oil collection chamber at the bottom of the range hood. Condensed oil, whether originating from the oil filter or the inner wall of the collection chamber, is guided and ultimately flows into this chamber. This design strictly confines the core oil accumulation area to the controllable range of the oil collection chamber, effectively preventing oil from spreading and contaminating a large area inside the range hood.

[0018] 5. The oil filter screen performs initial separation of oil fumes; secondly, the fine oil droplets that pass through the filter screen will further condense in the subsequent "closed oil fume channel". In particular, when the optimized structure of the concave guide area extending backward and downward from the bottom of the smoke collection chamber is adopted, gravity can be used to actively and unobstructedly guide the oil to the guide port.

[0019] 6. The overall design of this invention eliminates the complex supporting components and partitions found inside traditional range hoods. Through a few key components such as the left and right baffles, not only is the oil collection chamber enclosed, but a neat, smooth, and closed oil fume channel is naturally formed. This effectively reduces wind resistance. Lower wind resistance means the fan can achieve the same exhaust volume with lower energy consumption, improving the range hood's energy efficiency ratio and smoke extraction performance, while also reducing operating noise. Attached Figure Description

[0020] Figure 1 , 2 Figures 1 and 3 show the overall assembly effect of the present invention.

[0021] Figure 4 This is an exploded view of the wind turbine assembly in this invention.

[0022] Figure 5 This is an exploded view of the top plate structure in this invention.

[0023] Figure 6 , 7 This is an exploded view of the structure of the present invention.

[0024] Figure 8 This is a schematic diagram of the structure after the top plate is hidden in this invention.

[0025] Figure 9 This is a schematic diagram of the structure after the top and rear plates are hidden in this invention.

[0026] Figure 10 , 11 This is a schematic diagram of the smoke collection chamber structure in this invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Fan assembly; 10. Oil trough plate; 101. Oil collection chamber; 102. Oil cup; 103. Handle groove; 2. Housing; 21. Smoke inlet; 22. Oil cup groove; 23. Upper clearance groove; 24. Upper panel; 25. Lower clearance groove; 26. Lower panel; 3. Smoke collection chamber; 31. Oil filter screen; 32. Flow guide area; 33. Flow guide port; 34. Boss; 35. Baffle ring; 36. Through groove; 6. Top plate; 61. Connecting area; 7. Left baffle; 71. Left mounting cavity; 72. Upper hinge; 8. Right baffle; 81. Right mounting cavity; 82. Lower hinge; 9. Oil guide plate. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. This embodiment provides an oil guiding structure for a range hood, comprising: The housing 2 has a front opening and a top opening, and the lower front part of the housing 2 is provided with an oil cup groove 22 for installing an oil cup 102. The smoke collection chamber 3 is installed inside the housing 2. The front end of the smoke collection chamber 3 is connected to the front opening of the housing 2 to form a smoke inlet 21. An oil filter screen 31 is provided inside the smoke collection chamber 3. Top plate 6, which closes the top opening of the housing 2, and the top plate 6 is provided with a docking area 61 for installing the fan assembly 1; Left baffle 7 and right baffle 8 are respectively installed on the left and right sides behind the smoke collection chamber 3. The edges of the left baffle 7 and right baffle 8 abut against the smoke collection chamber 3, the top plate 6 and the rear wall of the shell 2, respectively, to form a closed fume channel behind the smoke collection chamber 3. Oil guide plate 9 is installed below the smoke collection chamber 3; An oil trough plate 10 is installed below the oil guide plate 9. The oil trough plate 10, together with the oil guide plate 9, the rear wall of the housing 2, the left baffle 7 and the right baffle 8, forms an oil collection cavity 101. The oil collecting chamber 101 has an oil drain port that communicates with the oil cup groove 22, which can guide the oil in the oil collecting chamber 101 into the oil cup 102 installed in the oil cup groove 22.

[0029] In this embodiment: First, the main frame of the range hood's oil guiding structure is formed by components such as the housing 2, the smoke collection chamber 3, and the top plate 6. Cooking fumes enter through the smoke inlet 21, and most of the grease is intercepted and dripped off as it passes through the oil filter. The remaining fumes, under the action of the fan assembly 1, flow upward through the closed smoke channel formed by components such as the left and right baffles. During this process, the fumes further cool and condense into oil. The key to this solution is that the ingenious combination of the left baffle 7, right baffle 8, oil guide plate 9, and oil tray plate 10 forms an independent and centralized oil collection chamber 101 at the bottom of the range hood. All the oil that condenses and drips from the oil filter and the inner wall of the channel is collected in this oil collection chamber 101 and then discharged into the oil cup 102 through the oil drain.

[0030] This design concentrates and isolates oil stains within the oil collection chamber 101, preventing oil from contaminating the entire interior of the range hood and fundamentally solving the problem of oil accumulating everywhere and being difficult to clean in existing technologies. At the same time, the well-organized oil fume channel reduces air resistance, and the smooth oil guiding path ensures efficient oil collection and prevents dripping.

[0031] In one embodiment, a front panel is further included, which is hinged to the front end of the housing 2; a left mounting cavity 71 is formed between the left baffle 7 and the left side wall of the housing 2, and a right mounting cavity 81 is formed between the right baffle 8 and the right side wall of the housing 2; a door hinge is installed in both the left mounting cavity 71 and the right mounting cavity 81, and the door hinge rotatably connects the front panel to the housing 2.

[0032] In this embodiment, left and right mounting cavities are cleverly formed by utilizing the gaps between the left and right baffles and the side walls of the housing 2. These two mounting cavities provide independent, concealed spaces for the installation of door hinges, allowing the door hinges to be accommodated within them without affecting the regularity of the fume extraction duct.

[0033] In one embodiment: the front panel includes an upper panel 24 disposed outside the smoke inlet 21 and a lower panel 26 disposed outside the oil cup groove 22; the door hinge includes: an upper door hinge 72 respectively installed in the left mounting cavity 71 and the right mounting cavity 81, the upper door hinge 72 passing through the upper clearance groove 23 disposed at the front end of the housing 2 and connected to the upper panel 24; and a lower door hinge 82 respectively installed in the left mounting cavity 71 and the right mounting cavity 81, the lower door hinge 82 passing through the lower clearance groove 25 disposed at the front end of the housing 2 and connected to the lower panel 26.

[0034] In this embodiment, the front panel is divided into an upper panel 24 and a lower panel 26, which are connected by an upper hinge 72 and a lower hinge 82, respectively. The upper and lower hinges pass through the pre-set upper and lower clearance grooves on the housing 2 and are connected to the panel.

[0035] This split panel and hinge design provides a more flexible opening method. For example, during normal use, only the upper panel can be opened, while the lower panel can be opened for partial maintenance when cleaning or installing the oil cup is required. In one embodiment: the bottom of the smoke collection chamber 3 extends backward and downward to form a concave guide area 32, the oil filter screen 31 is disposed at the top of the guide area 32, and the bottom of the guide area 32 is provided with a guide port 33 communicating with the oil collection chamber 101.

[0036] In this embodiment, a concave guide zone 32 sloping downwards and backwards is designed at the bottom of the smoke collection chamber 3, forming a natural oil guiding slope. Oil dripping from the oil filter screen 31 and the inner wall of the smoke collection chamber will naturally collect at the lowest point of this guide zone 32, i.e., the guide port 33, under the action of gravity, and fall directly and accurately into the oil collection chamber 101 below from this port.

[0037] This structure provides an active and unobstructed guiding path for the oil, avoiding the spread and accumulation of oil at the bottom plane of the smoke collection chamber, greatly improving the oil guiding efficiency and smoothness, and further reducing the risk of dripping.

[0038] In one embodiment: a boss 34 is formed by upward pressing inside the smoke collection chamber 3, and the oil filter screen 31 is disposed on the boss 34.

[0039] In this embodiment, a boss 34 is formed by directly stamping upwards on the sheet metal of the smoke collection chamber 3, providing a stable support platform for the oil filter screen 31.

[0040] This one-piece stamping structure reduces additional supporting parts and welding processes, simplifies the manufacturing process, and lowers costs. Meanwhile, the boss 34 separates the oil filter screen 31 from the bottom surface of the smoke collection chamber 3 by a certain distance, which facilitates oil dripping and airflow below.

[0041] In one embodiment: the oil filter screen 31 is composed of a plurality of through grooves 36 formed by stamping on the smoke collection chamber 3, and the periphery of each through groove 36 extends upward integrally to form a baffle ring 35.

[0042] The baffle ring 35 design effectively prevents the oil condensed on the filter screen from being blown away or flowing back by the rising airflow, playing a dual role of "oil blocking" and "oil guiding". It causes oil droplets to flow downward along the outer wall of the baffle ring 35, improving the efficiency of oil fume separation and oil guiding.

[0043] In one embodiment, an oil level sensor is provided in the oil cup slot 22, and the oil level sensor has terminals for electrical connection. The oil level sensor, installed in the oil cup slot 22 or on the oil cup 102, can monitor the oil level in the oil cup in real time and transmit the signal to the main control circuit of the range hood through its electrical connection terminals.

[0044] It features automatic monitoring and intelligent reminders for oil levels in the oil cup. When the oil level reaches a preset threshold, the range hood can automatically issue an audible and visual alarm or send a notification via the app to remind the user to empty the waste oil in time, avoiding the problem of oil overflow due to forgetting to clean it, and greatly improving the product's intelligence level and user experience.

[0045] In one embodiment, the oil cup 102 is made of a transparent material; it also includes a lower panel 26, which is disposed outside the oil cup slot 22 and has an observation window at a position corresponding to the oil cup 102. Users can easily see the oil level in the oil cup 102 through the observation window on the lower panel 26 without removing the oil cup. This is a simple, reliable, and low-cost method for monitoring oil levels, allowing users to easily determine when to clean the oil, making it very user-friendly.

[0046] In one embodiment, a hand-holding groove 103 is formed inwardly on the front of the oil cup 102. This simple hand-holding groove 103 provides a gripping point for the user's fingers, making the operation of removing or inserting the oil cup 102 from the oil cup groove 22 more convenient and stable, less prone to slippage, and improving the convenience and safety of operation.

[0047] In summary, the overall working process of the oil guiding structure for a range hood according to the present invention is as follows: When the range hood is turned on, the fan assembly 1 starts to work, and the upper panel opens upward under the action of the electric opening and closing mechanism, forming a negative pressure at the smoke inlet 21, which draws the cooking fumes above the stove into the machine body.

[0048] Phase 1: Oil Fume Separation and Initial Oil Guidance. The oil fumes first enter the fume collection chamber 3 and pass through the oil filter 31. The oil filter 31 can be an array of through-grooves 36 integrally stamped with baffle rings 35, which performs initial, efficient separation of the oil fumes. Most of the larger oil droplets will condense upon impact with the filter and drip off under gravity. If the bottom of the fume collection chamber 3 has a concave guide area 32, the oil droplets will precisely collect along the inclined surface and drip down into the guide port 33.

[0049] The second stage: secondary condensation and collection within the channel. The remaining oil fumes passing through the filter screen 31 enter a regular "closed oil fume channel" formed by the left baffle 7, right baffle 8, and the rear wall of the smoke collection chamber 3. Within this channel, the oil fumes continue to flow upwards and further cool, causing tiny oil droplets to condense on the various inner walls of the channel. Because the inner walls of the channel are relatively smooth, the condensed oil droplets coalesce into larger oil beads and flow vertically downwards along the wall surface.

[0050] The third stage: centralized isolation and collection of oil stains. Whether it's the oil dripping from the filter screen 31 and the guide port 33 in the first stage, or the oil flowing down the inner wall of the channel in the second stage, the final collection point is the oil collection chamber 101 located below the structure, enclosed by components such as the oil guide plate 9 and the oil trough plate 10. This oil collection chamber 101 acts as an "oil stain buffer zone" and "isolation zone," effectively separating all waste oil from the rest of the range hood's internal space.

[0051] Phase Four: Waste Oil Discharge and Monitoring. The waste oil collected in the oil collection chamber 101 flows smoothly into the oil cup 102 installed in the oil cup slot 22 through the oil drain port at its bottom. Users can observe the oil level in the transparent oil cup 102 at any time through the observation window on the lower panel 26. Alternatively, the built-in oil level sensor monitors the oil level in real time and provides timely reminders. When it is necessary to empty the waste oil, the user can easily remove it using the handle groove 103 on the oil cup 102.

[0052] When a deep cleaning of the range hood is required, the user can easily open the upper panel 24 and the lower panel 26 through the upper and lower hinges located in the left and right mounting cavities, thereby facilitating the wiping and maintenance of core areas such as the smoke collection chamber 3 and the oil filter screen 31.

[0053] In summary, this invention optimizes the flow path of oil fumes and oil through an integrated and modular design, achieving effective isolation and centralized treatment of oil contaminants. It has made significant progress in improving oil guiding efficiency, reducing wind resistance, facilitating cleaning, and enabling intelligent monitoring, and therefore can be widely promoted and used.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. An oil guiding structure of a range hood, characterized by, include: The housing (2) has a front opening and a top opening, and the lower front part of the housing (2) is provided with an oil cup groove (22) for installing an oil cup (102). The smoke collection chamber (3) is installed inside the housing (2). The front end of the smoke collection chamber (3) is connected to the front opening of the housing (2) to form a smoke inlet (21). An oil filter screen (31) is provided inside the smoke collection chamber (3). Top plate (6) closes the top opening of the housing (2), and the top plate (6) is provided with a docking area (61) for installing the fan assembly (1). The left baffle (7) and the right baffle (8) are respectively installed on the left and right sides behind the smoke collection chamber (3). The edges of the left baffle (7) and the right baffle (8) abut against the smoke collection chamber (3), the top plate (6) and the rear wall of the shell (2) to form a closed oil fume channel behind the smoke collection chamber (3). An oil guide plate (9) is installed below the smoke collection chamber (3); An oil trough plate (10) is installed below the oil guide plate (9). The oil trough plate (10), together with the oil guide plate (9), the rear wall of the housing (2), the left baffle (7) and the right baffle (8), form an oil collection cavity (101). The oil collecting chamber (101) has an oil drain port that communicates with the oil cup groove (22) to guide the oil in the oil collecting chamber (101) into the oil cup (102) installed in the oil cup groove (22).

2. The oil fume extractor oil guide structure according to claim 1, characterized in that: It also includes a front panel hinged to the front end of the housing (2); a left mounting cavity (71) is formed between the left baffle (7) and the left side wall of the housing (2), and a right mounting cavity (81) is formed between the right baffle (8) and the right side wall of the housing (2); a door hinge is installed in both the left mounting cavity (71) and the right mounting cavity (81), and the door hinge rotatably connects the front panel to the housing (2).

3. The oil fume extractor oil guide structure according to claim 2, characterized in that: The front panel includes an upper panel (24) disposed outside the smoke inlet (21) and a lower panel (26) disposed outside the oil cup groove (22); the door hinge includes: Upper hinges (72) are respectively installed in the left mounting cavity (71) and the right mounting cavity (81). The upper hinges (72) pass through the upper clearance groove (23) provided at the front end of the housing (2) and are connected to the upper panel (24); and The lower door hinge (82) is installed in the left mounting cavity (71) and the right mounting cavity (81) respectively. The lower door hinge (82) passes through the lower clearance groove (25) provided at the front end of the housing (2) and is connected to the lower panel (26).

4. The oil fume extractor oil guide structure according to claim 1, characterized in that: The bottom of the smoke collection chamber (3) extends backward and downward to form a concave guide area (32). The oil filter screen (31) is set at the top of the guide area (32), and the bottom of the guide area (32) is provided with a guide port (33) communicating with the oil collection chamber (101).

5. The oil guiding structure for a range hood according to claim 1 or 4, characterized in that: The smoke collection chamber (3) has an upward-pressed protrusion (34) inside, and the oil filter screen (31) is disposed on the protrusion (34).

6. The oil guiding structure for a range hood according to claim 1 or 4, characterized in that: The oil filter screen (31) is composed of several through grooves (36) formed by stamping on the smoke collection chamber (3), and the periphery of each through groove (36) extends upward integrally to form a baffle ring (35).

7. The oil guiding structure for a range hood according to claim 1, characterized in that: An oil level sensor is provided in the oil cup groove (22), and the oil level sensor has terminals for electrical connection.

8. The oil guiding structure for a range hood according to claim 1 or 3, characterized in that: The oil cup (102) is made of transparent material; it also includes a lower panel (26), which is disposed outside the oil cup groove (22) and has an observation window at the position corresponding to the oil cup (102).

9. The oil guiding structure for a range hood according to claim 8, characterized in that: The oil cup (102) has a recessed handle groove (103) on its front side.

Images