Range hood capable of realizing multi-stage separation of oil smoke and oil smoke separation method thereof
The multi-stage separation oil collecting rod and oil baffle structure of the range hood solves the problems of performance degradation and shortened life of the range hood caused by oil and dirt deposition, and achieves efficient oil fume separation and improved equipment stability.
Patent Information
- Application Number
- CN202511162409.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-19
- Publication Date
- 2025-10-17
AI Technical Summary
The accumulation of grease and dirt in household range hoods can cause the performance of filters and impellers to decline, noise to increase, motor load to increase, corrosion to intensify, and service life to shorten.
A range hood with multi-stage oil fume separation is designed. It adopts an oil collecting rod and oil baffle structure, combined with an oil filter and an oil collecting cup, to intercept and collect oil molecules at multiple levels, avoiding frequent cleaning of the filter.
It achieves efficient separation of oil smoke, reduces oil and dirt deposition, extends equipment life, reduces noise and motor load, avoids corrosion, and improves equipment stability.
Smart Images
Figure CN120799523A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of range hood, in particular to a household range hood, and more particularly to a range hood with multi-stage separation of oil fume and a method for separating oil fume. BACKGROUND
[0002] During long-term operation of the household range hood, a large amount of oil dirt is deposited on the surface of the filter screen and the impeller, which can cause a series of technical defects, not only reducing the performance of the equipment, but also significantly shortening the service life.
[0003] When the range hood is continuously working, the oil mist generated during cooking continuously contacts the filter screen. As the use time increases, the amount of oil dirt attached to the surface of the filter screen gradually tends to saturation. At this time, the adsorption capacity of the filter screen for oil mist continues to decrease, which cannot effectively intercept oil, resulting in a large amount of oil mist directly entering the inside of the equipment. In order to maintain the normal filtering function of the range hood, the user must regularly remove the filter screen for cleaning, which not only consumes time and effort, but also frequent disassembly can cause damage to the structure of the filter screen, affecting its filtering effect. The decrease of the oil filtering capacity of the filter screen will directly cause a large amount of oil dirt to be attached to the surface of the impeller, so that the weight of the impeller continuously increases. The increase of the weight of the impeller will significantly increase the load of the motor, and when the motor operates in a high load state, the heat generation of the motor will obviously increase, which not only reduces the working efficiency of the motor, but also aggravates the wear of the motor. At the same time, the increase of the load of the motor will also cause the noise during operation to be obviously larger, affecting the comfort of the living environment.
[0004] More seriously, a large amount of oil dirt deposited on the surface of the impeller and the filter screen will undergo oxidation reaction during long-term use, forming acidic substances. These acidic substances can corrode the metal parts of the range hood, causing rust phenomenon of the equipment. As the corrosion degree continuously deepens, the structural stability of the range hood will be seriously affected, and the aging speed of the equipment will be greatly accelerated, eventually significantly shortening the service life.
[0005] In summary, the series of chain reactions caused by oil dirt deposition of the household range hood has become the main technical defect restricting its performance and service life, which needs to be solved through technical innovation. SUMMARY
[0006] In order to solve the above technical problems, the present application provides a range hood with multi-stage separation of oil fume and a method for separating oil fume, which can not only quickly promote the separation of oil fume, but also avoid the trouble of frequently disassembling and cleaning the oil fume filter screen.
[0007] The technical solution adopted by the present application to solve the technical problems is as follows:
[0008] The application provides a multi-stage oil fume separating range hood, which comprises a smoke collecting cover, an oil fume channel, a fan assembly and a smoke outlet which are sequentially communicated from bottom to top, and an oil fume filtering device is arranged in the oil fume channel, wherein the oil fume filtering device comprises a hollow oil collecting rod and oil blocking sheets with arc surface structures, a plurality of inclined holes arranged in a spiral upward direction are formed in the oil collecting rod, the oil blocking sheets are fixed in the inclined holes with the arc surfaces downward and the angle between each oil blocking sheet and the oil collecting rod is greater than 90 degrees, a filter screen is arranged between the adjacent two oil blocking sheets, and an oil collecting cup is movably connected to the bottom of the oil collecting rod.
[0009] The application further provides a method for separating oil fume by using the range hood.
[0010] a. starting, the circuit control system of the range hood starts the fan assembly, and the fan rotates to form a negative pressure zone around the smoke collecting cover;
[0011] b. the oil fume rising from the pot is sucked into the oil fume channel through the smoke collecting cover and first contacts the lower oil blocking sheet due to the negative pressure, and part of the oil molecules with large specific gravity are attached to the surface of the oil blocking sheet due to the lower temperature of the oil blocking sheet than the oil fume;
[0012] c. the part of the escaping oil fume moves to the smoke outlet due to the negative pressure environment in the oil fume channel, and the escaping oil molecules are sequentially attached and intercepted by the upper oil blocking sheets and the filter screens, and finally are purified by the fan and discharged from the smoke outlet;
[0013] d. the oil molecules attached to the oil blocking sheets and the filter screens slide into the cavity of the oil collecting rod through the inclined holes and finally flow into the oil collecting cup.
[0014] Due to the above technical scheme, the circuit control system of the range hood starts the fan assembly, and the fan rotates to form a negative pressure zone around the smoke collecting cover; the oil fume rising from the pot is sucked into the oil fume channel through the smoke collecting cover and first contacts the lower oil blocking sheet due to the negative pressure, and part of the oil molecules with large specific gravity are attached to the surface of the oil blocking sheet due to the lower temperature of the oil blocking sheet than the oil fume; the part of the escaping oil fume moves to the smoke outlet due to the negative pressure environment in the oil fume channel, and the escaping oil molecules are sequentially attached and intercepted by the upper oil blocking sheets and the filter screens, and finally are purified by the fan and discharged from the smoke outlet; and the oil molecules attached to the oil blocking sheets and the filter screens slide into the cavity of the oil collecting rod through the inclined holes and finally flow into the oil collecting cup. The interception of the multiple oil blocking sheets and filter screens makes the oil fume unable to escape, and the oil fume separation and purification effect is better.
[0015] In order to achieve the purpose of the application better, the application has the following more optimal technical solutions.
[0016] In some embodiments, an oil absorption cotton layer is arranged around the inner wall of the oil fume channel to fill the gap between the oil fume channel and the oil fume filtering device.
[0017] In some embodiments, in order to facilitate the installation and dismounting of the oil filter screen, the oil filter screen has a slot at both ends for the edge of the oil baffle to be inserted, and the installation and dismounting can be completed by inserting or pushing the slot.
[0018] In some embodiments, in order to better intercept the escaped oil fume and make the oil fume separation more effective, the oil fume channel is further covered with a detachable top filter screen at the top end.
[0019] In some embodiments, in order to facilitate the installation and dismounting of the oil collecting rod in the oil fume channel, the oil collecting rod is installed at one end below the top filter screen. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 Fig. 1 is a structural schematic diagram of the oil fume extractor of the application;
[0021] Figure 2 Fig. 2 is another perspective structural schematic diagram of the oil fume extractor;
[0022] Figure 3 Fig. 3 is a sectional structural schematic diagram of the oil fume extractor;
[0023] Figure 4 Fig. 4 is a structural schematic diagram of the oil fume channel;
[0024] Figure 5 Fig. 5 is a front structural schematic diagram of the oil fume filtering device;
[0025] Figure 6 Fig. 6 is a top structural schematic diagram of the oil fume filtering device;
[0026] REFERENCE SIGNS
[0027] 1, smoke collecting hood; 2, oil fume channel; 3, fan assembly; 4, smoke outlet; 5, oil fume filtering device; 51, oil collecting rod; 511, inclined hole; 52, oil baffle; 6, oil filter screen; 7, oil receiving cup; 8, oil absorption cotton layer; 9, top filter screen. DETAILED DESCRIPTION
[0028] The application will be further described in detail below in combination with embodiments.
[0029] REFERENCE Figures 1 to 6As shown, the present application provides a multi-stage oil fume separating range hood, comprising: a smoke collecting cover 1, an oil fume channel 2, a fan assembly 3, and a smoke outlet 4, which are sequentially connected from bottom to top, the fan assembly 3 comprises a volute, a wind wheel arranged in the volute, and a motor arranged at the rear side of the volute and connected with the wind wheel, the oil fume channel 2 is provided with an oil fume filtering device 5, the oil fume filtering device 5 comprises: a hollow oil collecting rod 51 and oil blocking sheets 52 with arc surface structure, a plurality of inclined holes 511 arranged in a spiral upward direction are formed in the oil collecting rod 51, the inclined holes 511 are designed upward so that the angle formed between each oil blocking sheet 52 and the oil collecting rod 51 is greater than 90°, however, the arc surface structure of the oil blocking sheet 52 is arranged to adhere more oil mist molecules. The angle formed between the oil blocking sheet 52 and the oil collecting rod 51 refers to the angle formed between the lower part of the oil blocking sheet 52 and the oil collecting rod 51.
[0030] In the installation, the oil blocking sheet 52 is fixedly embedded into the inclined hole 511 with the arc surface downward, and the angle formed between each oil blocking sheet 52 and the oil collecting rod 51 is ensured to be greater than 90°; wherein, an oil filter screen 6 is arranged between the adjacent two oil blocking sheets 52; the bottom of the oil collecting rod 51 is further movably connected with an oil collecting cup 7, the oil collecting cup 7 is threadedly connected or clamped with the oil collecting rod 51; in operation, the oil fume enters the oil fume channel 2 through the smoke collecting cover 1 and is intercepted by each oil blocking sheet 52 and the oil filter screen 6 from bottom to top, at this time, the oil molecules adhered to the oil blocking sheet 52 and the oil filter screen 6 slide into the cavity of the oil collecting rod 51 through the inclined hole 511 and finally flow into the oil collecting cup 7 along the oil blocking sheet 52.
[0031] In some embodiments, an oil absorbing cotton layer 8 is arranged around the inner wall of the oil fume channel 2 to fill the gap between the oil fume channel 2 and the oil fume filtering device 5.
[0032] In some embodiments, in order to facilitate the installation and dismounting of the oil filter screen 6, the oil filter screen 6 is provided with a slot at both ends for embedding the edge of the oil blocking sheet 52, and the installation and dismounting can be completed by inserting or pushing the slot.
[0033] In some embodiments, in order to better intercept the escaping oil fume and make the oil fume separation more effective, a detachable top filter screen 9 is further arranged at the top end of the oil fume channel 2.
[0034] In some embodiments, in order to facilitate the installation and dismounting of the oil collecting rod 51 in the oil fume channel 2, one end of the oil collecting rod 51 is installed below the top filter screen 9, and the upper end of the oil collecting rod 51 is threadedly connected or clamped or fixedly connected with the annular ring of the top filter screen 9.
[0035] Due to the above technical scheme, during operation, the circuit control system of the range hood starts the fan assembly 3, at which time the wind wheel rotates to form a negative pressure area around the smoke collecting hood 1; the oil fume rising from the pot is sucked into the oil fume channel 2 through the smoke collecting hood 1 and first contacts the lower oil baffle 52; since the temperature of the oil baffle 52 is lower than the temperature of the oil fume, part of the oil molecules with relatively large specific gravity are attached to the surface of the oil baffle 52 due to the cold; the negative pressure environment in the oil fume channel 2 promotes part of the escaped oil fume to move to the direction of the smoke outlet 4, and the escaped oil molecules are sequentially attached and intercepted by the upper oil baffles 52 and the oil filter screen 6, and finally are discharged from the smoke outlet 4 after being purified by the wind wheel; at this time, the oil molecules attached to the oil baffles 52 and the oil filter screen 6 slide into the cavity of the oil collecting rod 51 through the inclined hole 511 along the oil baffle 52 and finally flow into the oil collecting cup 7. The interception of the multiple sets of oil baffles 52 and the oil filter screen 6 makes the oil fume unable to escape, and the oil fume separation and purification effect is better.
[0036] The above only describes some embodiments of the present application. Those skilled in the art can make several modifications and improvements without departing from the inventive concept, and these all belong to the protection scope of the present application.
Claims
1. A range hood with multi-stage oil fume separation, comprising: The smoke hood, the oil smoke channel, the fan assembly, and the smoke exhaust port are connected in sequence from bottom to top, and are characterized by: An oil fume filtering device is provided in the oil fume channel, and the oil fume filtering device includes: a hollow oil collecting rod and an oil baffle with an arc surface structure, the oil collecting rod is provided with a plurality of inclined holes arranged in a spiral upward manner; the oil baffle is embedded in the inclined hole with one end facing downward and fixed, and ensures that the angle formed by each oil baffle and the oil collecting rod is greater than 90°; wherein, an oil filter net is provided between two adjacent oil baffles; an oil receiving cup is also movably connected to the bottom of the oil collecting rod; during operation, the oil fume enters the oil fume channel through the smoke collecting hood and intercepts the escaping oil molecules from bottom to top with the oil baffles and the oil filter net. At that time, the oil molecules attached to the oil baffle and the oil filter net slide along the oil baffle through the inclined hole into the cavity of the oil collecting rod and finally flow into the oil receiving cup.
2. The range hood with multi-stage oil fume separation according to claim 1, characterized in that: An oil-absorbing cotton layer is arranged around the inner wall of the oil fume channel to fill the gap between the oil fume channel and the oil fume filtering device.
3. The range hood with multi-stage oil fume separation according to claim 1, characterized in that: Both ends of the oil filter are provided with slots for the edges of the oil baffle to be embedded.
4. The range hood with multi-stage oil fume separation according to claim 1, characterized in that: The top of the oil smoke channel is also covered with a detachable top filter.
5. The range hood with multi-stage oil fume separation according to claim 4, characterized in that: The oil collecting rod is detachably connected to the top filter screen.
6. A method for multi-stage separation of oil smoke from a range hood according to any one of the preceding claims, characterized in that: The method comprises the following steps: a. Turn on the range hood. The circuit control system of the range hood starts the fan assembly, and then the fan wheel rotates to form a negative pressure area around the smoke hood; b. Under the influence of negative pressure, the oil smoke rising from the pot is sucked into the oil smoke channel through the smoke collecting hood and first contacts the oil baffle below. Since the temperature of the oil baffle is lower than the temperature of the oil smoke, some of the oil molecules with larger specific gravity are cooled and attached to the surface of the oil baffle; c. Due to the negative pressure in the oil fume duct, some of the escaping oil fume moves toward the exhaust port. The escaping oil molecules are intercepted by the oil baffles and oil filters above, and finally purified by the fan and discharged from the exhaust port. d. At that time, the oil molecules attached to the oil baffle and the oil filter will slide along the oil baffle through the inclined hole into the cavity of the oil collecting rod and finally flow into the oil collecting cup.