Filter-free quick-acting range hood

Abstract

A kind of filter-free quick-acting oil fume exhauster, it includes smoke collecting hood, the bottom of smoke collecting hood is recessed and is provided with open-mouthed smoke collecting bin, the bottom of smoke collecting bin is provided with long strip-shaped smoke inlet, the top of smoke collecting hood is provided with air cabinet, and smoke suction module in air cabinet generates negative pressure when working, and oil fume is sucked from smoke inlet;Condensing plate is suspendedly installed below the smoke collecting bin, and annular smoke suction passage is formed between the periphery of condensing plate and smoke collecting bin by being hollowed out.The beneficial effects of the utility model are as follows: the utility model discards the design of setting filter screen in smoke inlet or air duct of traditional oil fume exhauster, and directly communicates with air cabinet through long strip-shaped smoke inlet, and efficient oil fume separation structure is integrated in smoke inlet path.The design without filter screen fundamentally eliminates the trouble of filter screen blockage, so that the path of oil fume entering oil fume exhauster is unobstructed, airflow resistance is greatly reduced, so that the best air inlet smoothness of smoke inlet is ensured.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, specifically a filter-free, fast-suction range hood. Background Technology

[0002] Range hoods are an essential appliance in modern kitchens. Their main function is to draw in, filter, and expel fumes, steam, and odors generated during cooking, keeping the kitchen air fresh and maintaining a hygienic environment.

[0003] Traditional range hoods, especially those with suction inlets or air intakes, are generally equipped with oil filters (or oil separators, or fume separators). Their main function is to separate oil droplets or mist from the airflow through physical interception or inertial separation, preventing oil from entering the duct and fan, thus protecting the fan and extending the range hood's lifespan. However, this technology relying on oil filters for fume separation has many drawbacks.

[0004] First, because cooking fumes contain a large number of oily particles and impurities, the grease filter is easily clogged with grease after a period of use. Once clogged, the range hood's normal smoke extraction function will be severely affected. Users will need to frequently disassemble, clean, or replace the grease filter, which not only increases the user's operating costs and maintenance burden, but the cleaning process is also often tedious and incomplete, easily causing secondary pollution and affecting the overall cleanliness and hygiene of the kitchen.

[0005] Secondly, the presence of the grease filter itself creates significant air resistance to the range hood's suction performance. Even when the filter is clean, it still hinders smooth airflow to some extent, requiring the fan to overcome greater resistance to achieve the preset suction volume. This additional air resistance directly results in the range hood consuming more energy while failing to achieve the desired smoke extraction effect, thus reducing energy efficiency.

[0006] Furthermore, due to clogging of the grease filter and high air resistance, the suction efficiency of range hoods decreases significantly. During cooking, especially when a large amount of fumes is generated, range hoods often fail to effectively and promptly remove the fumes, causing some to spread throughout the kitchen, polluting walls, furniture, and tableware, and posing potential health hazards. This reduced efficiency significantly diminishes the user experience of range hoods, preventing them from fully fulfilling their intended function, thus necessitating further improvements. Utility Model Content

[0007] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a filter-free, fast-suction range hood with a more compact structure, a more aesthetically pleasing appearance, and the ability to effectively solve the problem of oil filter clogging, reduce wind resistance, and improve smoke extraction efficiency.

[0008] The purpose of this utility model is achieved through the following means: a filter-free, fast-suction range hood, which includes a smoke collection hood, an open smoke collection chamber recessed at the bottom of the smoke collection hood, an elongated smoke inlet at the bottom of the smoke collection chamber, and a blower unit installed on the top of the smoke collection hood. The blower unit is connected to the smoke inlet. When the smoke extraction module inside the blower unit is working, it generates negative pressure and draws in oil fumes from the smoke inlet. A condenser plate is suspended below the smoke collection chamber, and the condenser plate and the smoke collection chamber are hollowed out to form a ring-shaped smoke channel.

[0009] Furthermore, the width of the smoke inlet is 75% to 90% of the width of the smoke collection chamber.

[0010] Furthermore, the height of the smoke inlet is 20% to 30% of the height of the smoke collection chamber.

[0011] Further details: The smoke inlet is a through groove cut into the material of the smoke collection chamber body.

[0012] Furthermore, the smoke collection chamber is configured as a trapezoidal shape, wider on the outside and narrower on the inside.

[0013] Furthermore, the upper rear end face of the condenser plate is installed in the smoke collection chamber via a connecting rod seat, and the upper front end face of the condenser plate is installed in the smoke collection chamber via a ball bearing seat.

[0014] Furthermore, the condenser plate is made of metal sheet or glass.

[0015] Furthermore, the condenser plate is installed at an angle, with the front higher than the back.

[0016] Furthermore, the bottom of the smoke hood is equipped with an oil collection trough, and the rear end of the condenser plate extends into the vertically upward projection surface of the oil collection trough.

[0017] The beneficial effects of this utility model are: 1. Simple structure, low production cost, and improved market competitiveness.

[0018] 2. This invention abandons the traditional design of setting up oil filters in the smoke inlet or duct of range hoods. Instead, it uses a long, narrow smoke inlet that connects directly to the blower unit, and incorporates a highly efficient oil-fume separation structure into the smoke intake path. This filter-free design fundamentally eliminates the problem of filter clogging, ensuring unobstructed entry of oil fumes into the range hood, greatly reducing airflow resistance, and thus ensuring optimal airflow at the smoke inlet. As a result, the range hood can achieve a larger air volume with less energy consumption, significantly improving smoke extraction efficiency and ensuring that the oil fumes generated during cooking are quickly and thoroughly removed, keeping the kitchen air fresh.

[0019] 3. This utility model ingeniously utilizes the combination of the condenser plate and the smoke collection chamber to achieve two-stage separation of oil fumes, greatly improving the oil fume separation efficiency.

[0020] 4. Since the oil filter has been eliminated, users no longer need to frequently disassemble, clean, or replace the oil filter, greatly reducing the daily maintenance cost and time of the range hood.

[0021] 5. The separated oil droplets will flow along the guide structure of the condenser plate and the smoke collection chamber, collecting in the oil collection cup. Users only need to clean the oil collection cup periodically. Furthermore, the filterless design results in low wind resistance, making the fan more efficient, reducing unnecessary energy consumption, and aligning with the trend of energy conservation and environmental protection. Attached Figure Description

[0022] Figure 1 This is a diagram showing the final assembly and usage effect of this utility model.

[0023] Figure 2 This is an exploded view of the structure of this utility model.

[0024] Figure 3 This is a schematic diagram of the structure behind the concealed condenser plate of this utility model.

[0025] Explanation of reference numerals in the attached diagram: 1. Smoke hood; 2. Smoke chamber; 3. Smoke inlet; 4. Air handling unit; 5. Condensate plate; 6. Smoke extraction passage; 7. Connecting rod seat; 8. Ball bearing seat; 9. Oil collection trough. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings. A filter-free, fast-suction range hood includes a smoke collection hood 1, an open smoke collection chamber 2 recessed at the bottom of the smoke collection hood 1, an elongated smoke inlet 3 at the bottom of the smoke collection chamber 2, and a fan cabinet 4 installed on the top of the smoke collection hood 1. The fan cabinet 4 is connected to the smoke inlet 3. When the smoke extraction module inside the fan cabinet 4 is working, it generates negative pressure and draws in cooking fumes from the smoke inlet 3. A condenser plate 5 is suspended below the smoke collection chamber 2, and a ring-shaped smoke channel 6 is formed by the perforation between the condenser plate 5 and the smoke collection chamber 2.

[0027] In this embodiment: when the range hood is turned on, the smoke extraction module inside the fan housing 4 installed at the top of the smoke collection hood 1 starts working, generating a strong negative pressure. This negative pressure, through its connection with the smoke inlet 3, forms a strong suction area below the smoke collection hood 1. The fumes generated during cooking are first collected by the smoke collection hood 1 and then sucked into the concave, open-shaped smoke collection chamber 2 at the bottom.

[0028] During the process of the fumes being drawn into the fume collection chamber 2, since the condenser plate 5 is suspended below the fume collection chamber 2, the rising fume airflow will first impact and contact the lower surface, or front, of the condenser plate 5. Because the temperature of the condenser plate 5 is usually lower than the temperature of the fumes, most of the oil droplets and some water vapor in the fumes will condense here due to the sudden temperature drop, adhering to the surface of the condenser plate 5, achieving initial oil-fume separation. Subsequently, the airflow bypasses the condenser plate 5, enters the interior of the fume collection chamber 2 through the annular smoke extraction channel formed between the condenser plate 5 and the fume collection chamber 2, and is finally drawn into the air handling unit 4 and discharged through the elongated smoke inlet 3.

[0029] It should be noted that the suspended installation position of the condenser plate 5 allows the oil fumes to undergo preliminary condensation and separation by impacting the front of the condenser plate 5 before entering the main air intake channel. This effectively reduces the amount of oil fumes entering the air duct and fan, and protects the internal components.

[0030] Meanwhile, the structural design of the smoke hood 1 and the smoke collection chamber 2, as well as the annular smoke extraction channel formed by the condenser plate 5 and the smoke collection chamber 2, ensure that the fumes can be smoothly and efficiently captured and guided to the air intake, thereby improving the overall smoke extraction efficiency.

[0031] In one embodiment, the width of the smoke inlet 3 is 75% to 90% of the width of the smoke collection chamber 2.

[0032] In this embodiment, when the width of the smoke inlet 3 is within 75% to 90% of the width of the smoke collection chamber 2, it ensures that the negative pressure effectively covers most of the area of ​​the smoke collection chamber 2. This ratio avoids both insufficient smoke extraction and eddy currents caused by an inlet that is too small, and insufficient suction caused by an inlet that is too large. This ensures that the fumes entering the smoke collection chamber 2 can be drawn in evenly and efficiently, reducing the possibility of escape.

[0033] In one embodiment, the height of the smoke inlet 3 is 20% to 30% of the height of the smoke collection chamber 2.

[0034] In this embodiment, proper control of the inlet height helps balance the vertical distribution of the suction negative pressure, allowing the fumes to enter the inlet 3 with optimal airflow after secondary separation within the fume collection chamber 2. This height range helps form a stable suction channel, preventing turbulence caused by excessive or insufficient local negative pressure before the fumes enter, which would affect the separation effect.

[0035] In this embodiment: the smoke inlet 3 is a through groove opened in the main material of the smoke collection chamber 2.

[0036] In this embodiment, the smoke inlet 3 is not a separately installed component, but rather a through groove integrally carved into the main body material of the smoke collection chamber 2. This structure eliminates the need for additional connecting parts or gaps between the smoke collection chamber 2 and the smoke inlet 3. This reduces the number of components and assembly processes, thereby lowering manufacturing costs.

[0037] In one embodiment, the smoke collection chamber 2 is configured as a trapezoid with a larger outer diameter and a smaller inner diameter.

[0038] In this embodiment, the smoke collection chamber 2 is designed as a trapezoidal shape, wider at the outside and narrower at the inside, with the open end (the inlet of oil fumes) being larger and gradually narrowing towards the smoke inlet 3. This geometry utilizes fluid dynamics principles to better capture and guide the oil fumes. The structure, wider at the outside and narrower at the inside, effectively gathers the oil fumes, and as the airflow moves from the larger space to the smaller space, the airflow speed gradually increases. This acceleration process helps the oil fume particles to collide and condense more effectively with the inner wall of the smoke collection chamber and the reverse side of the condenser plate, while simultaneously guiding the oil sludge downwards.

[0039] In this embodiment: the wide inlet effectively captures oil fumes, and the gradually narrowing structure helps guide the oil fumes towards the inlet. Simultaneously, the accelerated airflow helps the oil fume particles contact the wall surface, improving separation efficiency. Furthermore, the sloping inner wall facilitates the flow of condensed oil down the wall surface.

[0040] In one embodiment: the upper rear end face of the condenser plate 5 is installed in the smoke collection chamber 2 via the connecting rod seat 7, and the upper front end face of the condenser plate 5 is installed in the smoke collection chamber 2 via the ball bearing seat 8.

[0041] In this embodiment, the combined installation of the connecting rod seat 7 and the ball bearing seat 8 ensures that the condenser plate 5 can be stably and precisely suspended below the smoke collection chamber 2. The connecting rod seat 7 typically provides fixed support, while the ball bearing seat 8 may provide a detachable or adjustable fixing method to facilitate the installation, removal, and cleaning of the condenser plate.

[0042] In one embodiment, the condenser plate 5 is made of metal sheet or glass.

[0043] In this embodiment, metal sheets such as stainless steel and aluminum alloys have good thermal conductivity, enabling them to quickly create a temperature difference with the passing oil fumes and efficiently promote condensation. Simultaneously, their smooth surfaces facilitate oil flow and cleaning. Glass materials also possess the characteristics of a smooth surface, easy cleaning, and resistance to oil buildup. Furthermore, they are corrosion-resistant, aesthetically pleasing, and provide sufficient condensation.

[0044] In one embodiment, the condenser plate 5 is installed at an angle, with the front higher than the back.

[0045] In this embodiment, the condenser plate 5 is installed at an angle, higher at the front and lower at the back, utilizing the principle of gravity. After the oil fumes impact the surface of the condenser plate 5 and condense, the resulting oil droplets flow down the angled surface from higher to lower. This design ensures that the condensed oil can be continuously and effectively discharged from the surface of the condenser plate, preventing oil droplets from accumulating or being carried away again by the suction airflow, thus ensuring that the condenser plate 5 remains in an optimal separation state.

[0046] In one embodiment: an oil collection trough 9 is installed at the bottom of the smoke hood 1, and the rear end of the condenser plate 5 extends into the vertically upward projection surface of the oil collection trough 9.

[0047] In this embodiment, the oil collection trough 9 is installed at the bottom of the fume hood 1 and is specifically used to collect oil sludge after condensation and separation. The condenser plate 5 is installed at an angle, with the front higher than the rear, so that the oil sludge flows towards its rear end. It is ensured that the rear end of the condenser plate 5, including its edges, extends into the vertical projection plane of the oil collection trough 9. This allows all oil sludge flowing down from the condenser plate 5 and the inner wall of the fume hood 2, regardless of its flow path, to be accurately dripped into the oil collection trough 9 for collection, thus forming a complete closed-loop oil sludge collection system.

[0048] In summary, the core working principle of this filter-free, fast-suction range hood lies in its unique structural design and airflow organization, which enables efficient, graded condensation and separation of oil fumes without a filter, combined with high air volume and low wind resistance suction and exhaust characteristics.

[0049] Specifically, when the user turns on the range hood, the smoke extraction module inside the fan housing 4 at the top of the smoke collection hood 1 activates, generating a strong negative pressure. This negative pressure quickly creates a powerful suction area within the smoke collection hood 1 and the smoke collection chamber 2 below. During cooking, the oily fumes generated are first effectively captured by the fume hood 1 under negative pressure. Then, these fumes are guided to the inlet of the concave, open-shaped fume collection chamber 2 at the bottom of the hood 1. Upon entering the collection chamber 2, the rising fumes first impact the front, or lower surface, of the condenser plate 5 suspended below it. Since the condenser plate 5 is made of metal or glass, its surface temperature is typically lower than that of the high-temperature fumes. Therefore, large oil droplets and some water vapor in the fumes undergo a rapid phase change here, condensing into liquid oil and adsorbing onto the surface of the condenser plate 5. This is the first stage of oil fume separation achieved by this invention, equivalent to a highly efficient "pre-separation" process.

[0050] After the first stage of separation, the airflow no longer carries a large amount of large oil particles and becomes relatively "clean." This airflow is then guided into the interior space of the smoke collection chamber 2 through the annular smoke extraction channel 6 reserved between the condenser plate 5 and the smoke collection chamber 2. Inside the smoke collection chamber 2, due to its trapezoidal structure with a larger outer surface and a smaller inner surface, the airflow undergoes a speed change as it is drawn towards the elongated smoke inlet 3 at the bottom, making full contact with the inner wall of the smoke collection chamber 2 and the back surface (upper surface) of the condenser plate 5. On these smooth surfaces with a certain temperature difference, residual fine oil droplets and water vapor will condense again, adhering to the wall surface to form an oil film that flows downwards. This is the second stage of oil fume separation achieved by this invention, namely "deep separation."

[0051] Through these two physical separation processes, the oil and grease in the fumes are separated to the maximum extent. The clean air after separation is then drawn into the air handling unit 4 and discharged outdoors through the elongated smoke inlet 3 integrated into the bottom of the smoke collection chamber 2. The optimized design of the width and height of the smoke inlet 3 ensures smooth and efficient airflow, greatly reduces suction resistance, and improves the overall smoke extraction efficiency of the range hood. Throughout the condensation and separation process, the condenser plate 5 is installed at an angle, higher at the front and lower at the back. This ensures that all grease condensing on the surface of the condenser plate and the inner wall of the smoke collection chamber flows efficiently to a lower position under the influence of gravity. To thoroughly collect this grease, an oil collection trough 9 is installed at the bottom of the smoke hood 1, and the rear end of the condenser plate 5 extends precisely into the vertical upward projection plane of the oil collection trough 9, ensuring that all flowing grease drips accurately and completely into the oil collection trough 9. Users only need to clean the oil collection trough 9 periodically, greatly simplifying the daily maintenance of the range hood.

[0052] In summary, this utility model, through a combination of innovative technical solutions such as "filterless design," "two-stage physical condensation separation," "optimized airflow channel," and "complete oil collection system," achieves significant advantages for the range hood: efficient smoke extraction, thorough separation of oil fumes, low wind resistance, and easy cleaning without the need for filtration. It provides users with a cleaner, more convenient, and more efficient kitchen environment and is therefore widely applicable.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A filter-free, high-speed suction range hood, characterized in that: It includes a smoke collection hood (1), with an open smoke collection chamber (2) recessed at the bottom of the smoke collection hood (1), and a long smoke inlet (3) at the bottom of the smoke collection chamber (2). A blower (4) is installed on the top of the smoke collection hood (1), and the blower (4) is connected to the smoke inlet (3). When the smoke extraction module inside the blower (4) is working, it generates negative pressure and draws in oil fumes from the smoke inlet (3). A condenser plate (5) is suspended below the smoke collection chamber (2), and a ring-shaped smoking channel (6) is formed between the condenser plate (5) and the smoke collection chamber (2).

2. The filter-free, high-speed suction range hood according to claim 1, characterized in that: The width of the smoke inlet (3) is 75% to 90% of the width of the smoke collection chamber (2).

3. The filter-free, high-speed suction range hood according to claim 1, characterized in that: The height of the smoke inlet (3) is 20% to 30% of the height of the smoke collection chamber (2).

4. The filter-free, high-speed suction range hood according to claim 1, characterized in that: The smoke inlet (3) is a through groove opened in the main body material of the smoke collection chamber (2).

5. A filter-free, high-speed suction range hood according to claim 1, characterized in that: The smoke collection chamber (2) is configured as a trapezoid with a larger outer diameter and a smaller inner diameter.

6. A filter-free, high-speed suction range hood according to claim 1, characterized in that: The upper rear end face of the condenser plate (5) is installed in the smoke collection chamber (2) through the connecting rod seat (7), and the upper front end face of the condenser plate (5) is installed in the smoke collection chamber (2) through the ball bearing seat (8).

7. A filter-free, high-speed suction range hood according to claim 1, characterized in that: The condenser plate (5) is made of metal sheet or glass.

8. A filter-free, high-speed suction range hood according to claim 1, characterized in that: The condenser plate (5) is installed at an angle, with the front higher than the back.

9. A filter-free, high-speed suction range hood according to claim 1, characterized in that: The bottom of the smoke hood (1) is equipped with an oil collection trough (9), and the rear end of the condenser plate (5) extends into the vertical upward projection surface of the oil collection trough (9).

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