Range hood wave folding oil baffle and cleaning device thereof

Abstract

The oil fume machine wave folding oil baffle and its cleaning device, which are composed of the oil fume machine wave folding oil baffle and the special cleaning device, constitute a new type of oil filter screen. According to different needs of household and commercial use, the wave folding oil baffle is bent into a three-bent V shape or a five-bent W shape or a seven-bent or nine-bent continuous wave folding shape, and the surface thereof is roughened to form dozens of wave folding air ducts which are not communicated with each other. The oil fume is sucked into the wave folding air duct, and the flow direction is changed along with the wave folding oil baffle. Since the water vapor, oil particles and oil mist in the oil fume have a mass greater than that of air, when the oil fume changes direction, it collides with the wave folding oil baffles on both sides of the air duct due to inertia, adheres to the rough surface, and flows to the oil collecting groove of the oil fume machine along the wave folding oil baffle. In order to clean the oil stains in the wave folding oil baffle, the cleaning device which stores the wave folding oil baffle of the oil fume machine, cleaning liquid, electric control heater and flushing and ultrasonic vibration is matched. The present application solves the contradiction between the ventilation rate and the oil filtering rate of the existing oil fume machine oil filter screen.

Description

Technical Field

[0001] This invention belongs to the field of household appliance technology and relates to a component of a range hood, specifically a range hood vortex baffle and its cleaning device. Background Technology

[0002] Since the early 1980s, my country has imported European and Japanese range hoods, gradually developing its own range hood industry. The evolution of this industry can be seen in the grease filter, the first component of the range hood that comes into contact with cooking fumes: the first generation evolved from wire mesh to plate mesh, with filtration and ventilation rates around 50%; the second generation used a combination of wire mesh and plate mesh, increasing filtration and ventilation rates to around 55%; the third generation adopted a multi-layered composite convex-concave filter, with staggered mesh heights, causing grease to repeatedly collide with the filter walls and condense, increasing filtration and ventilation rates to 60-70%. At this stage, filtration and ventilation rates became contradictory: denser mesh resulted in better filtration, but ventilation rates decreased dramatically. By 2019, the fourth generation of baffle-type oil filters had emerged, as disclosed in utility model patents CN211706233, CN212362139U, and CN213790424U. These patents feature double / triple-layer stainless steel baffles, which cause oil fumes to make sharp turns and collide with the baffle strips, resulting in oil condensation. This design prevents oil from clogging the ventilation channels. Therefore, the oil filtration rate and ventilation rate are no longer contradictory, and increasing the number of baffles can significantly improve the oil filtration rate. These straight-bar baffles, with their ease of disassembly and cleaning, have become the mainstream configuration for oil filtration components in modern range hoods.

[0003] The cooking fumes extracted by range hoods contain water vapor and oil vapor, with particle sizes ranging from 6 nanometers to 20 micrometers. The higher the cooking temperature, the more oil fume particles are produced. All common edible vegetable oils, such as soybean oil, rapeseed oil, and peanut oil, are chemically composed of unsaturated fatty acid glycerides, with carbon-carbon unsaturated double bonds in their core molecular structure. Under the high-temperature airflow of the range hood, the grease adhering to the filter screen, fan impeller, and the inner cavity of the range hood undergoes accelerated oxidation with oxygen, triggering molecular chain cross-linking and polymerization. This transforms the liquid, small-molecule grease into a network of large-molecule solid colloids and hardened grease. Therefore, a dried, hardened grease film, similar to a soft paint film, is formed inside the range hood. This is the main reason why some newer range hoods using electric heating or steam spray cleaning technology to clean the fan impeller and housing are not very effective. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of existing range hood filter screens, break away from previous structural design ideas, and take a different approach to provide a filter screen with high ventilation rate, which increases the collision and contact area between oil fumes and filter screens by tens of times, thereby significantly improving the oil filtration rate. In addition, a special cleaning device is designed to clean the filter screen with this structure.

[0005] The present invention relates to a range hood pleated oil baffle plate and its cleaning device, characterized in that: a range hood pleated oil baffle plate (1) with a square frame and a matching cleaning device (4) constitute a novel range hood component.

[0006] The aforementioned range hood corrugated oil baffle (1) has a square frame with four sides connected around the perimeter. The top of the frame has two right-angled strips (1.1) that are connected and fixed to the left and right side plates (1.2) with outward-turned grooves. A wide gap is left in the middle of the top. The bottom of the frame has two flat strips (1.3) that are connected and fixed to the bottom of the left and right side plates (1.2), forming a fully open channel at the bottom. Dozens of corrugated oil baffles (1.4) with equal spacing are installed in the space inside the frame. The upper part of these corrugated oil baffles (1.4) is fixed to the two right-angled strips (1.1) at the top of the frame, and the lower part is fixed to the two flat strips (1.3) at the bottom of the frame, thus forming the range hood corrugated oil baffle (1).

[0007] The aforementioned wavy baffle plate (1) of the range hood is installed on the air inlet of the range hood at an angle between vertical and 45 degrees. The wavy baffle plate (1.4) inside the square frame is made of stainless steel sheet or heat-resistant plastic. According to different size requirements for residential and commercial use, it is made into a V-shaped, W-shaped or continuous wavy baffle plate. These wavy baffle plates (1.4) are arranged at a certain interval. Between these wavy baffle plates (1.4), dozens of non-interconnected fume ventilation channels are formed. The fumes enter the ventilation channel through the air inlet (2) of this wavy baffle plate (1.4) and can only change the airflow direction along the wavy baffle plate (1.4) and finally flow out from the air outlet (3). The water vapor, oil particles, and oil mist in the fumes, which are heavier than air, collide directly with the corrugated oil baffles (1.4) on both sides of the ventilation duct due to their greater inertia when the flow direction changes. They adhere to the surface of these corrugated oil baffles (1.4). As more oil adheres, it flows along the slanted corrugated oil baffles (1.4) to the bottom, passes through the fully open channel, and drips into the oil collection tank of the range hood.

[0008] The corrugated oil baffle (1.4) is designed with an angle greater than 25 degrees and less than 90 degrees for each fold, depending on the different usage requirements of household and commercial range hoods. There are three-fold V-shaped, five-fold W-shaped, and seven-fold and nine-fold continuous corrugated oil baffles. The length of each fold is 30 mm to 90 mm. The appropriate corrugated oil baffle (1.4) is selected and manufactured according to the specific size of the range hood.

[0009] The aforementioned wavy oil baffle plate (1) of the range hood has a brushed surface treatment on the surface of the stainless steel sheet along the vertical direction; the injection molded part is designed with fine grooves; and the 3D printed part has unique layer textures. These rough surfaces (1.4.1) can increase the effect of intercepting and capturing water vapor, oil particles and oil mist in the oil fume airflow during the collision process with it. If there is too much oil on the surface, it will also flow into the oil collection tank of the range hood along the brushed surface, grooves and layer textures.

[0010] For the oil accumulation on the outer surface of the wavy baffle plate (1) of the range hood, the accumulated grease can be wiped off by hand. However, the grease on the inner wavy baffle plate cannot be wiped off from the outside. Therefore, a matching cleaning device (4) is required to clean the grease stuck inside.

[0011] The cleaning device (4) has an upright long trough (4.1) into which two oil-repellent baffle plates (1) of the range hood can be inserted side by side; four support legs (4.1.1) extend from the bottom to increase stability; a partition (4.1.2) at the top opening divides the upright long trough (4.1) into two compartments, one long and one short; the partition (4.1.2) leaves a gap of about three centimeters at the bottom of the upright long trough, so that the cleaning liquid in the cleaning device (4) can flow between the two compartments; and there is an upright long trough cover at the top opening of the upright long trough (4.1).

[0012] The long compartment of the cleaning device (4) is the space for the range hood folding oil baffle (1). At both ends of this compartment are two protruding plates (4.2) that cooperate with the grooves of the steel side plates (1.2) at both ends of the two range hood folding oil baffles (1). At the bottom of the protruding plate (4.2) is a protruding plate limiting block (4.2.1). Align the grooves of the side plates (1.2) at both ends of the range hood folding oil baffle (1) with the protruding plate (4.2), insert it into the vertical long groove (4.1) and push it to the bottom of the protruding plate limiting block (4.2.1) so that the range hood folding oil baffle (1) is fully inserted into the vertical long groove (4.1). At the bottom of this compartment, a high-temperature resistant ultrasonic generator (5) is installed.

[0013] In another short compartment of the vertical long trough (4.1) of the cleaning device (4), a self-controlled electric heating rod (7) with a settable temperature is installed on the side plate (4.1.3) of the vertical long trough with a fixing clip (6); a miniature submersible pump (8) is installed at the bottom, and the water outlet hose (8.1) of the miniature submersible pump (8) is connected to the long compartment of the oil baffle plate (1) of the range hood inserted on the side. In the middle of the upper part of the two oil baffle plates (1) of the range hood, the side plate (4.1.3) of the vertical long trough and the partition plate (4.1.2), there is a U-shaped groove (4.1.4) in each of them, and a water outlet pipe (8.2) with a water outlet hose (8.1) connected to the miniature submersible pump (8) is installed with a water outlet hole on each side.

[0014] The wavy baffle plate (1) of the range hood of the present invention is based on the water baffle plate of the spray chamber in air conditioning technology, and is designed with improvement and innovation in combination with the actual application scenario of the range hood; the cleaning device (4) is also based on various ultrasonic, bubble, vibration and other cleaning tanks, especially aquarium structures; these mature and applicable technologies in the large air conditioning, textile and aquaculture industries are applied to the range hood of household appliances across industries, and a new approach is taken to combine and innovate.

[0015] Compared with the traditional technology of existing range hood oil filter plates, the beneficial effects of the present invention are:

[0016] 1. Significantly improved ventilation rate per unit area of ​​the oil filter plate: This solved the contradiction between ventilation rate and oil filtration rate of the oil filter plate in range hoods. Taking the corrugated oil baffle (1) of a common household range hood as an example, the ventilation duct is generally 4 mm wide, and the thickness of the corrugated oil baffle (1.4) is: 0.2 mm for stainless steel thin plate; and 0.4 mm for heat-resistant plastic and 3D printing. In this way, the ventilation rate can reach 90% to 95%.

[0017] 2. The wavy oil baffle (1.4) is not easily clogged by oil stains, which greatly extends the time for cleaning oil stains.

[0018] 3. With the same size of oil filter screen, the exhaust resistance of the range hood is significantly reduced, allowing the range hood to draw in a larger volume of air.

[0019] 4. In this isolated ventilation duct, the airflow of oil fumes can only change direction by constantly changing along the corrugated oil baffle (1.4). The collision area between the oil fumes and the corrugated oil baffle (1.4) is increased by dozens of times in the double-sided bend channel. The rough surface (1.4.1) of the plate wall can trap and capture more oil mist, which greatly improves the oil filtration rate of the range hood's oil filter screen.

[0020] 5. A special cleaning device (4) was designed, which innovated the cleaning method of the wavy oil baffle of the range hood.

[0021] Instruction manual illustrations

[0022] Figure 1 This is a front view of the present invention;

[0023] Figure 2 yes Figure 1 The left view;

[0024] Figure 3 yes Figure 1 A bottom view;

[0025] Figure 4 yes Figure 1 Top view;

[0026] Figure 5 This is a schematic diagram showing the collision between the oil fume airflow and the corrugated oil baffle plate;

[0027] Figure 6 This is a magnified view of the fine structure of the rough surface of the corrugated oil baffle.

[0028] Figure 7 This is a left view of the cleaning device;

[0029] Figure 8 yes Figure 7 AA section view;

[0030] Figure 9 yes Figure 7 Top view.

[0031] In the diagram, 1 is the corrugated oil baffle of the range hood, 1.1 is the right-angled edge strip, 1.2 is the channel steel side plate, 1.3 is the flat edge strip, 1.4 is the corrugated oil baffle, 1.4.1 is the rough surface, 2 is the air inlet of the corrugated oil baffle, 3 is the air outlet of the corrugated oil baffle, 4 is the cleaning device, 4.1 is the vertical long trough, 4.1.1 is the support leg of the vertical long trough, 4.1.2 is the partition of the vertical long trough, 4.1.3 is the side plate of the vertical long trough, 4.1.4 is the U-shaped groove, 4.2 is the convex plate, 4.2.1 is the convex plate limiting block, 5 is the ultrasonic generator, 6 is the fixing clamp, 7 is the self-controlled electric heating rod, 8 is the miniature submersible pump, 8.1 is the water outlet hose, and 8.2 is the water outlet pipe. Detailed Implementation

[0032] The technical solutions of the present invention will be further described below with reference to the accompanying drawings of one embodiment of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] The corrugated oil baffle (1.4) in the frame of the corrugated oil baffle (1) of this range hood is a corrugated oil baffle (1.4) made of stainless steel sheet bent into a W shape five times, forming a 16 cm long oil fume ventilation duct with five folds. The oil fume airflow in this ventilation duct bends and collides with the rough stainless steel sheet surface on both sides, and the oil mist in the oil fume airflow is adhered to the rough stainless steel surface (1.4.1). The ratio of the unit area of ​​the air inlet (2) to the contact area of ​​the rough stainless steel surface (1.4.1) on both sides reaches tens of times, which is significantly improved than the oil filtering effect of various existing range hood oil filter screens.

[0034] When using this cleaning device (4), open the cover of the vertical long trough, fill the vertical long trough (4.1) with special cleaning solution, insert the oil baffle plate (1) of the range hood that needs to be cleaned into the vertical long trough (4.1) and soak it in the cleaning solution, close the cover of the vertical long trough, turn on the self-controlled electric heating rod (7), adjust the temperature control to 60 to 80 degrees, and turn on the micro submersible pump (8); pump the cleaning solution at the bottom of the vertical long trough (4.1) to A water outlet pipe (8.2) with two drain holes is located between the two folded oil baffle plates (1) of the range hood. The water sprays onto the wide slit channel left in the middle of the top of the folded oil baffle plate (1). After passing through the rough surface (1.4.1) of the folded oil baffle plate (1.4), the water flows to the bottom of the folded oil baffle plate (1). The cleaning solution is sprayed in a circulating manner to dissolve and wash away the oil stains adhering to the wall of the folded oil baffle plate (1.4) inside the range hood folded oil baffle plate (1). The ultrasonic generator (5) can also be turned on to make the cleaning solution vibrate ultrasonically to wash the rough surface (1.4.1) inside the folded oil baffle plate (1.4), which can enhance the cleaning effect.

Claims

1. A pleated oil baffle plate for a range hood and its cleaning device, characterized in that: A new type of range hood component is formed by a square-framed wavy oil baffle plate (1) and a matching cleaning device (4).

2. The range hood pleated oil baffle plate and its cleaning device according to claim 1, characterized in that: The top of the square frame of the range hood corrugated oil baffle (1) has two right-angled strips (1.1), which are connected and fixed to the two outward-turned steel side plates (1,2) on the left and right, leaving a wide gap in the middle of the top; the bottom of the square frame has two flat strips (1.3), which are connected and fixed to the bottom of the left and right side plates (1.2), forming a fully open channel at the bottom; in the space inside the square frame, dozens of corrugated oil baffles (1.4) are installed at equal intervals. The upper part of these corrugated oil baffles (1.4) is fixed to the two right-angled strips (1.1) at the top of the square frame, and the lower part is fixed to the two flat strips (1.3) at the bottom of the square frame, thus forming the range hood corrugated oil baffle (1).

3. The range hood pleated oil baffle plate and its cleaning device according to claim 2, characterized in that: The range hood's corrugated oil baffle (1) is installed on the air inlet of the range hood at an angle between vertical and 45 degrees. The corrugated oil baffle (1.4) in the frame is made of stainless steel sheet or heat-resistant plastic, and is made into a V-shaped, W-shaped or continuous corrugated oil baffle. They are arranged at equal intervals, and a non-communicating oil fume ventilation channel is formed between these corrugated oil baffles (1.4). The oil fume enters the ventilation channel through the air inlet (2) of this corrugated oil baffle (1.4), and the airflow direction changes continuously along the corrugated oil baffle (1.4) before flowing out from the air outlet (3).

4. The range hood pleated oil baffle and its cleaning device according to claim 3, characterized in that: The corrugated oil baffle (1.4) is bent at an angle greater than 25 degrees and less than 90 degrees. It has three bends in a V shape, five bends in a W shape, and seven bends and nine bends in a continuous corrugated shape. The length of each corrugation is 30 mm to 90 mm.

5. The range hood pleated oil baffle plate and its cleaning device according to claim 2, characterized in that: The surface of the corrugated oil baffle (1.4) is made of stainless steel sheet along the vertical height direction. When the stainless steel sheet is made of thin sheet, the surface of the thin sheet is given a brushed surface treatment. When heat-resistant injection molded parts are used, the surface is designed with fine grooves. Using 3D printing to create unique layer textures, these rough surfaces (1.4.1) can increase the effectiveness of trapping and capturing water vapor, oil particles, and oil mist in cooking fumes.

6. The range hood pleated oil baffle plate and its cleaning device according to claim 1, characterized in that: The cleaning device (4) has an upright long slot (4.1) through which two oil-repellent baffle plates (1) of the range hood can be inserted side by side; four support legs extend from the bottom to increase stability. 4.1.1) There is a partition (4.1.2) at the top opening to divide the vertical long trough (4.1) into two compartments, a long one and a short one; this partition (4.1.2) leaves a gap of about three centimeters at the bottom of the vertical long trough so that the cleaning liquid in the cleaning device (4) can flow between the two compartments, and there is a vertical long trough cover at the top opening.

7. The range hood pleated oil baffle and its cleaning device according to claim 6, characterized in that: At each end of the long grid of the cleaning device (4), there are two protruding plates (4.2) that cooperate with the grooves of the steel side plates (1.3) at both ends of the two oil-spreading baffle plates (1) of the range hood. The bottom of the protruding plate (4.2) has a protruding plate limiting block (4.2.1), and an ultrasonic generator (5) is installed at the bottom of the grid.

8. The range hood pleated oil baffle and its cleaning device according to claim 6, characterized in that: In the short compartment of the cleaning device (4), a self-controlled electric heating rod (7) with adjustable temperature is installed on the upright long trough side plate (4.1.3) with a fixing clip (6); a miniature submersible pump (8) is installed at the bottom, and the water outlet hose (8.1) of the miniature submersible pump (8) is connected to the long compartment of the range hood corrugated oil baffle (1) inserted on the side. In the middle of the upper part of the two range hood corrugated oil baffles (1), the upright long trough side plate (4.1.3) and the partition (4.1.2) each have a U-shaped groove (4.1.4), and a water outlet pipe (8.2) with a water outlet hose (8.1) connected to the miniature submersible pump (8) is installed with a water outlet hole on each side.

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