Range hood

Abstract

The invention relates to the technical field of household appliances, and discloses a range hood. The range hood comprises an air cabinet in which a range hood fan is arranged; the exhaust fume collecting hood comprises a main body part and an air inlet section, the main body part is arranged below the air cabinet and is communicated with an inner cavity of the air cabinet, the air inlet section is arranged below the main body part and is provided with a first side and a second side which are oppositely arranged, the first side is arranged on the mounting side of the range hood, and the second side inclines towards the operating side of the range hood from bottom to top; a range hood air inlet is formed in the second side; the smoke guide plate is connected to the bottom wall of the air inlet of the range hood, the smoke guide plate is provided with a smoke guide position, and when the smoke guide plate is located at the smoke guide position, the smoke guide plate inclines towards the direction of the mounting side of the range hood. According to the range hood, the contradiction between the oil smoke suction effect and the attractiveness of the range hood can be broken through, the negative pressure can be more effectively guided to the position close to the source, the trapping efficiency is remarkably improved, and the excellent smoke trapping effect can be achieved without increasing the height of the smoke cavity or sacrificing the appearance design.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a range hood. Background Art

[0002] The range hood is used to absorb oil smoke, preventing it from polluting the environment and causing harm to human health. It has become a household appliance with a high penetration rate in modern kitchen environments.

[0003] In the related art, the range hood includes a wind cabinet and a smoke collecting hood arranged under the wind cabinet. The smoke collecting hood is provided with an air inlet for absorbing oil smoke. When the thickness of the smoke collecting hood of the range hood is set thicker, the air inlet on the smoke collecting hood is closer to the gas hood, which can help improve the smoke extraction effect, but will destroy the aesthetics of the range hood. Summary of the Invention

[0004] In view of this, the present invention provides a range hood to solve the problem in the related art that it is difficult to strike a balance between the oil fume suction effect and the aesthetics of the range hood.

[0005] The present invention provides a range hood, comprising:

[0006] Wind cabinet, which is equipped with a range hood fan;

[0007] The fume hood comprises a main body and an air inlet section, wherein the main body is arranged below the fume cabinet and communicates with the inner cavity of the fume cabinet, and the air inlet section is arranged below the main body, and the air inlet section has a first side and a second side which are arranged opposite to each other, the first side being arranged at the installation side of the range hood, and the second side being inclined toward the operating side of the range hood from bottom to top, and the range hood air inlet being arranged on the second side;

[0008] The smoke guide plate is connected to the bottom wall of the range hood air inlet and has a smoke guide position. When the smoke guide plate is in the smoke guide position, the smoke guide plate is inclined toward the installation side of the range hood.

[0009] Beneficial effect: When the range hood of the embodiment of the present invention is in use, the range hood fan can form a negative pressure in the smoke hood, causing the oil smoke to be sucked into the smoke hood of the range hood under the action of the negative pressure, and then discharged to the outside through the flue.

[0010] In addition, since in the embodiment of the present application, the second side of the smoke collection hood is arranged to be inclined from bottom to top toward the operating side of the range hood, such a setting can not only make the air inlet of the range hood closer to the cookware, but also help to effectively guide and focus the negative pressure generated by the range hood fan to the cooking area or directly above the position where suction is required, reducing the diffusion loss of negative pressure, making the effective suction force more concentrated on the target area, and also making the second side of the smoke collection chamber face the injection trajectory of the oil smoke, thereby prompting the air inlet section to capture the oil smoke.

[0011] On this basis, the smoke guide plate is tilted toward the installation side of the range hood, which can form a guide channel in the smoke hood, guiding the airflow to turn smoothly and accelerate to the range hood air inlet of the fan, thereby significantly reducing the turbulence, eddy current and flow separation caused by sudden turning of the airflow or impact of the vertical / outward-expanding edge at the inlet of the range hood, avoiding additional energy loss caused by turbulence and separation, and reducing the air intake resistance, so that the range hood fan can inhale more air volume at the same speed, or reduce the power required by the range hood fan when the same air volume is achieved, thereby improving the efficiency of the entire machine.

[0012] On this basis, the shape of the smoke guide plate helps to more effectively guide and focus the negative pressure generated by the range hood fan to the cooking area or directly above the location where suction is needed, reducing the diffusion loss of negative pressure, making the effective suction force more concentrated on the target area, improving the efficiency of oil fume capture, reducing the escape of oil fume to the surroundings, and improving the use effect.

[0013] The optimized airflow through the smoke guide plate flows more evenly, stably, and with better directionality to the range hood fan's inlet. This avoids uneven inlet flow fields that can cause uneven force on the range hood fan's impeller, resulting in additional vibration and noise. This reduces operating noise and improves user comfort. Furthermore, a uniform flow field contributes to efficient and stable operation of the range hood fan.

[0014] Therefore, the range hood of the embodiment of the present invention can break the contradiction between the oil fume suction effect and aesthetics of the range hood by tilting the second side of the smoke collection hood and tilting it inside the air inlet of the range hood. When the position of the air inlet of the range hood is relatively fixed, the negative pressure can be more effectively guided to a position close to the source, which significantly improves the capture efficiency. It can achieve excellent smoke capture effect without increasing the height of the smoke chamber or sacrificing the appearance design.

[0015] In an optional embodiment, the angle between the second side and the vertical direction is α1, 15°≤α1≤20°.

[0016] Beneficial effect: When the angle of α1 is larger, it helps to make the air inlet of the range hood closer to the cookware, and helps to effectively guide and focus the negative pressure generated by the range hood fan to the cooking area or directly above the position where suction is required, reducing the diffusion loss of negative pressure, making the effective suction force more concentrated on the target area, and also enabling the second side of the smoke collecting chamber to face the spray trajectory of the oil smoke, thereby prompting the air inlet section to capture the oil smoke, thereby improving the smoke extraction effect of the range hood.

[0017] However, if the angle α1 is too large, the side of the range hood will become too thick, which will destroy the range hood's visually slim effect and hinder its aesthetics. Experiments have shown that as α1 increases from 0° to 20°, the range hood's overall air volume and fume extraction efficiency both increase. However, as α1 continues to increase, the side thickness of the range hood increases significantly.

[0018] In the embodiment of the present application, 15°≤α1≤20°. The above numerical range is a preferred range obtained through a large number of experiments, which can ensure the smoke extraction effect of the range hood without destroying the aesthetics of the range hood.

[0019] In an optional embodiment, the air inlet of the range hood has a first side and a second side connected at an angle, the first side extends in a horizontal direction, and the length of the second side is L1, 90mm≤L1≤100mm.

[0020] Beneficial Effects: Experiments have shown that increasing L1 from 80mm to 100mm increases both the range hood's overall air volume and efficiency. However, when L1 is too large, the air velocity at the range hood's air inlet decreases significantly, making it difficult to achieve adequate extraction efficiency.

[0021] In the embodiment of the present application, 90mm≤L1≤100mm. The above numerical range is a preferred range obtained through a large number of experiments, which can enable the range hood to have a better overall air volume and oil fume extraction efficiency.

[0022] In an optional embodiment, the smoke guide plate is a flat plate structure. When the smoke guide plate is in the smoke guiding position, the angle between the smoke guiding surface of the smoke guide plate and the horizontal direction is α2, and 40°≤α2≤70°.

[0023] Beneficial Effects: The applicant conducted experiments to investigate the relationship between the inclination angle of the smoke deflector and the range hood's air volume and efficiency, with L1 at 100 mm and α1 at 20°. The results showed that when a2 is less than 40°, air entering the air inlet directly impacts the rear wall of the hood, forming a vortex, which fails to optimize the inlet flow pattern and increase air volume. As α2 increases, the overall air volume and efficiency gradually decrease. When α2 reaches 70°, the air volume decreases by approximately 3%.

[0024] In an optional embodiment, the smoke guide plate is rotatably connected to the bottom wall of the range hood air inlet, and the smoke guide plate also has a closed position. The smoke guide plate can block the range hood air inlet when in the closed position. The range hood also includes a driving mechanism, which is connected to the smoke guide plate and can drive the smoke guide plate to switch between the smoke guiding position and the closed position.

[0025] Beneficial Effects: With this configuration, when the range hood is in the oil fume extraction mode, the smoke guide plate can be switched to the smoke guide position, thereby improving the oil fume extraction effect of the range hood. When the range hood is not in operation, the smoke guide plate can be switched to the closed position to prevent oil fume from flowing back when the range hood is not in operation, and to prevent dust and mosquitoes from entering the range hood through the range hood inlet.

[0026] When the range hood is an air-conditioning hood, the smoke guide plate can be switched to the closed position when the air-conditioning module is turned on and the range hood is not absorbing oil smoke, thereby preventing the condenser fan exhaust hot air from colliding with oil smoke in the cooling mode alone, increasing the air volume of the condenser fan exhaust hot air, and facilitating cooling;

[0027] Secondly, when the smoke guide plate is switched to the closed position, the smoke guide plate can also be visually integrated with the front side of the air inlet section, thereby improving the aesthetics of the range hood.

[0028] In an optional embodiment, the driving mechanism includes:

[0029] The rotation source is located in the air inlet section;

[0030] A connecting rod assembly, one end of the connecting rod assembly is connected to the rotation source, and the second end of the connecting rod assembly is connected to the smoke guide plate.

[0031] In an optional embodiment, the effective air inlet height of the smoke hood is L2, 270 mm ≤ L2 ≤ 320 mm.

[0032] Beneficial effect: When L2 is within the above range, the vertical height of the smoke hood can cover the initial rising area of ​​the oil smoke during cooking, ensuring that the oil smoke is fully captured.

[0033] The range hood of the embodiment of the present application does not encourage adjustment of a single parameter. Instead, it coordinates and optimizes the design of four parameters: the angle α1 between the second side and the vertical direction, the size L1 of the second side, the angle α2 between the smoke guide plate and the vertical direction, and the distance L2 between the upper edge of the smoke hood and the lower edge of the smoke hood. Orthogonal experimental design is conducted on the inclination angle of the second side of the air inlet section and the size of the range hood air inlet, and multiple groups of experimental schemes are constructed. Fluid simulation analysis is used to quantitatively analyze the inlet flow velocity, air volume, and negative pressure zone distribution of each scheme. By analyzing the variation pattern of the simulation results, it is found that each parameter has a significant impact on the performance indicators. At the same time, a single-factor analysis of the inclination angle of the smoke guide plate is conducted, and it is found that its influence on the flow field distribution shows a clear monotonic variation pattern.

[0034] The inclination angle a1 of the second side of the fume hood directly influences the location of the negative pressure zone. The length L1 of the second side of the range hood's air inlet determines the wind speed attenuation characteristics and air volume, while the inclination angle of the smoke deflector significantly affects the stability of the flow field and the efficiency of the flow diversion. By scientifically matching these key parameters, the range hood of the present invention optimizes the flow field distribution at the range hood's air inlet, effectively expanding the radiation range of the negative pressure zone at the range hood's air inlet and maximizing its proximity to cooking utensils, thereby achieving efficient capture of cooking fumes.

[0035] It breaks the traditional cognition and design that reducing the thickness and volume of the range hood, especially lowering the height of the smoke collection chamber will inevitably lead to: compression of the effective smoke collection space and flow channel space, a sharp increase in airflow resistance, deterioration of the fan inlet flow field, decreased efficiency, increased noise, difficulty in establishing negative pressure, and a significant reduction in capture efficiency. Technical prejudice.

[0036] Under the premise that the physical space (thickness, volume) is strictly constrained, an efficient internal flow field path is designed through aerodynamic optimization, achieving the design goal of maintaining excellent smoking performance in an ultra-thin and compact body.

[0037] In an optional embodiment, the range hood further includes:

[0038] The air conditioning module is arranged above the wind cabinet. A condensing air outlet is arranged on the top of the wind cabinet. The air conditioning module includes a condensing fan. The air outlet of the condensing fan is connected to the condensing air outlet.

[0039] Beneficial Effects: The condensing fan's air inlet is positioned toward the condenser, allowing air to flow through the condenser. The hot air generated by heat exchange with the condenser is then discharged into the hood through the condensing fan's outlet and condensing air inlet. Finally, the range hood fan exhausts the air outdoors along with cooking fumes. The evaporating fan continuously draws air between the evaporator's fins for heat exchange, sending the cooled air indoors, controlling the kitchen temperature to an appropriate range and improving the cooking environment. This continuously circulates indoor air, achieving cooling and lowering the temperature.

[0040] In an optional embodiment, the bottom wall of the main body of the fume hood is inclined upward along the direction from the installation side to the operation side of the range hood.

[0041] In an optional embodiment, the range hood further includes:

[0042] An oil pan is located inside the fume hood and below the fan of the range hood; and / or

[0043] The oil cup is located below the air inlet section.

[0044] Beneficial Effect: When the oil pan is positioned below the range hood fan, a negative pressure zone is created below the fan, allowing the pan to directly collect dripping grease, eliminating the need for an additional oil guide. The oil cup is positioned below the air inlet section, allowing separated oil droplets to fall into the cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0046] Figure 1 is a three-dimensional diagram of a range hood according to an embodiment of the present invention;

[0047] Figure 2 A side sectional view of a range hood according to an embodiment of the present invention;

[0048] Figure 3 is a three-dimensional diagram of a range hood according to an embodiment of the present invention;

[0049] Figure 4 A side sectional view of a range hood according to an embodiment of the present invention;

[0050] Figure 5 A side sectional view of a fume hood of a range hood according to an embodiment of the present invention;

[0051] Figure 6 A side sectional view of a range hood according to an embodiment of the present invention;

[0052] Figure 7 for Figure 6 A magnified view of point A in the figure;

[0053] Figure 8 This is a front view of a range hood according to an embodiment of the present invention;

[0054] Figure 9 This is a pressure nephogram of the range hood according to an embodiment of the present invention when α1 is 20°;

[0055] Figure 10 is the pressure contour of the range hood when α1 is 0°;

[0056] Figure 11 These are pressure cloud diagrams of the range hood according to an embodiment of the present invention when the angles of the smoke guide plate are 40°, 50°, 60°, and 70°.

[0057] Description of reference numerals:

[0058] 1. Wind cabinet;

[0059] 2. Fume hood; 201. Air inlet section; 2011. First side; 2012. Second side; 2013. Range hood air inlet; 20131. First side; 20132. Second side; 2014. Condensation inlet; 202. Main body;

[0060] 3. Smoke guide plate;

[0061] 4. Driving mechanism; 401. Rotation source; 402. Connecting rod assembly;

[0062] 6. Oil pan;

[0063] 7. Oil cup;

[0064] 8. Range hood fan; 801. Fan main air inlet; 802. Fan auxiliary air inlet;

[0065] 9. Condensing fan; 10. Evaporating fan; 11. Air conditioning module;

[0066] 12. Installation side, 13. Operation side. DETAILED DESCRIPTION

[0067] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0068] Due to limited kitchen space, in order to improve kitchen space utilization, a variety of thin range hoods have appeared on the market.

[0069] In the related art, in the process of pursuing ultra-thin range hood appearance, there are the following major technical problems:

[0070] First, as the thickness of the smoke hood continues to decrease, the distance between the negative pressure area formed by the range hood air inlet and the cooking pots has increased significantly, seriously affecting the smoke extraction effect;

[0071] Secondly, there is a contradictory relationship between the size of the range hood's air inlet and the wind speed attenuation and air volume requirements. There are technical difficulties in balancing the air volume and wind speed of the range hood.

[0072] The following combination Figures 1 to 11 , describing embodiments of the present invention.

[0073] According to an embodiment of the present invention, a range hood is provided, comprising a fume cabinet 1 , a fume collecting hood 2 and a fume guide plate 3 .

[0074] The range hood 1 is equipped with a range hood fan 8. The fume hood 2 includes a main body 202 and an air inlet section 201. The main body 202 is located below the range hood 1 and communicates with the interior of the range hood 1. The air inlet section 201 is located below the main body 202 and has a first side 2011 and a second side 2012 that are opposed to each other. The first side 2011 is located on the range hood installation side 12. From bottom to top, the second side 2012 is inclined toward the range hood operation side 13. The range hood air inlet 2013 is provided on the second side 2012. A smoke guide plate 3 is connected to the bottom wall of the range hood air inlet 2013. The smoke guide plate 3 has a smoke guiding position. When in the smoke guiding position, the smoke guide plate 3 is inclined toward the range hood installation side 12.

[0075] When the range hood of the embodiment of the present invention is in use, the range hood fan 8 can form a negative pressure in the fume hood 2, causing the fume to be sucked into the fume hood 2 of the range hood under the action of the negative pressure and then discharged to the outside through the flue.

[0076] In addition, since in the embodiment of the present application, the second side 2012 of the smoke hood 2 is configured to be inclined from bottom to top toward the operating side 13 of the range hood, such a configuration can not only make the range hood air inlet 2013 closer to the cookware, but also help to effectively guide and focus the negative pressure generated by the range hood fan 8 to the cooking area or directly above the position where suction is required, reducing the diffusion loss of the negative pressure, making the effective suction force more concentrated on the target area, and also enable the second side 2012 of the smoke collection chamber to face the injection trajectory of the oil smoke, thereby prompting the air inlet section 201 to capture the oil smoke.

[0077] On this basis, the smoke guide plate 3 is tilted toward the installation side 12 of the range hood, which can form a guide channel in the smoke hood 2, guiding the airflow to turn smoothly and smoothly and accelerate to flow toward the range hood air inlet 2013 of the fan, thereby significantly reducing the turbulence, eddy current and flow separation caused by sudden turning of the airflow or collision with the vertical / outward-expanding edge at the range hood air inlet 2013, avoiding additional energy loss caused by turbulence and separation, and reducing the air intake resistance, so that the range hood fan 8 can inhale more air volume at the same speed, or reduce the power required by the range hood fan 8 when the same air volume is achieved, thereby improving the efficiency of the entire machine.

[0078] On this basis, the shape of the smoke guide plate 3 helps to more effectively guide and focus the negative pressure generated by the range hood fan 8 to the cooking area or directly above the position where suction is required, reducing the diffusion loss of the negative pressure, making the effective suction force more concentrated on the target area, improving the efficiency of collecting oil smoke, reducing the escape of oil smoke to the surroundings, and improving the use effect.

[0079] The optimized airflow through the smoke guide plate 3 flows more evenly, stably, and with better directionality to the range hood fan 8's air inlet 233. This avoids uneven inlet flow fields that would otherwise cause uneven force on the impeller of the range hood fan 8, resulting in additional vibration and noise. This reduces operating noise from the range hood fan 8 and improves user comfort. Furthermore, the uniform flow field also facilitates efficient and stable operation of the range hood fan 8.

[0080] Therefore, the range hood of the embodiment of the present invention can break the contradiction between the oil fume suction effect and the aesthetics of the range hood by tilting the second side 2012 of the smoke hood 2 and tilting it inside the range hood air inlet 2013. When the position of the range hood air inlet 2013 is relatively fixed, the negative pressure is more effectively guided to a position close to the source, which significantly improves the capture efficiency and can achieve excellent smoke capture effect without increasing the height of the smoke chamber or sacrificing the appearance design.

[0081] The operating side 13 of the range hood is the side facing the user during use for human-computer interaction, and the installation side 12 of the range hood is the side used to connect to the wall during use.

[0082] In one embodiment, Figure 2 As shown, the range hood fan 8 includes a main air inlet of the range hood and an auxiliary air inlet of the range hood.

[0083] In one embodiment, the included angle between the second side 2012 and the vertical direction is α1, and 15°≤α1≤20°.

[0084] like Figure 9 and Figure 10 As shown, when the angle α1 is larger, it helps to make the range hood air inlet 2013 closer to the cookware, and helps to effectively guide and focus the negative pressure generated by the range hood fan 8 to the cooking area or directly above the position where air suction is required, reducing the diffusion loss of the negative pressure, making the effective suction force more concentrated on the target area, and also enables the second side 2012 of the smoke collecting chamber to face the spray trajectory of the oil smoke, thereby prompting the air inlet section 201 to capture the oil smoke, thereby improving the smoke extraction effect of the range hood.

[0085] However, if the angle α1 is too large, the side of the range hood will become too thick, which will destroy the range hood's visually slim effect and hinder its aesthetics. Experiments have shown that as α1 increases from 0° to 20°, the range hood's overall air volume and fume extraction efficiency both increase. However, as α1 continues to increase, the side thickness of the range hood increases significantly.

[0086] In the embodiment of the present application, 15°≤α1≤20°. The above numerical range is a preferred range obtained through a large number of experiments, which can ensure the smoke extraction effect of the range hood without destroying the aesthetics of the range hood.

[0087] In one embodiment, Figure 1 and Figure 3 As shown, the range hood air inlet 2013 has a first side 20131 and a second side 20132 connected at an angle, the first side 20131 extends in the horizontal direction, and the length of the second side 20132 is L1, 90mm≤L1≤100mm.

[0088] When the length L1 of the second side 20132 increases, the length of the range hood air inlet 2013 increases and the wind speed decreases.

[0089] Experiments have shown that increasing L1 from 80mm to 100mm increases both the range hood's overall air volume and efficiency. However, when L1 is too large, the air velocity at the range hood's air inlet 2013 significantly decreases, making it difficult to achieve adequate extraction efficiency.

[0090] In the embodiment of the present application, 90mm≤L1≤100mm. The above numerical range is a preferred range obtained through a large number of experiments, which can enable the range hood to have a better overall air volume and oil fume extraction efficiency.

[0091] The applicant simulated the air volume and efficiency of the range hood when a1 and L1 took different values, and recorded the data as follows:

[0092]

[0093] In one embodiment, Figure 4 and Figure 5 As shown, the smoke guide plate 3 is a flat plate structure. When the smoke guide plate 3 is in the smoke guiding position, the angle between the smoke guiding surface of the smoke guide plate 3 and the horizontal direction is α2, and 40°≤α2≤70°.

[0094] The applicant conducted an experiment on the relationship between the inclination angle of the smoke guide plate 3 and the air volume and efficiency of the range hood when L1 was 100 mm and α1 was 20°. Figure 11 As shown in the figure, experimental results show that when a2 is less than 40°, air entering the air inlet directly impacts the rear wall of the smoke hood 2, forming a vortex, which fails to optimize the inlet flow pattern and increase air volume. As α2 increases, the overall air volume and efficiency gradually decrease. When α2 increases to 70°, the air volume decreases by about 3%.

[0095] In a preferred embodiment, a2=67°.

[0096] In one embodiment, a2=70°. Experiments have shown that when a2=70°, although the air volume of the range hood decreases by 3%, the negative pressure range of the range hood does not decrease significantly, so the range hood still has a good smoke capture effect.

[0097] In a preferred embodiment, α2=40°.

[0098] The applicant simulated the air volume and efficiency of the range hood when a2 takes different values, and recorded the data as follows:

[0099] a2(°) Speed ​​rpm <![CDATA[Air volume m 3 / min]]> efficiency% 40° 1000 29.74 52.80 50° 1000 29.57 52.54 60° 1000 29.48 51.97 70° 1000 28.66 50.39

[0100] In one embodiment, the smoke guide plate 3 is rotatably connected to the bottom wall of the range hood air inlet 2013. The smoke guide plate 3 also has a closed position. The smoke guide plate 3 can block the range hood air inlet 2013 when in the closed position. The range hood also includes a driving mechanism 4. The driving mechanism 4 is connected to the smoke guide plate 3 and can drive the smoke guide plate 3 to switch between the smoke guiding position and the closed position.

[0101] With this arrangement, when the range hood is in the oil fume extraction state, the smoke guide plate 3 can be switched to the smoke guide position, thereby improving the oil fume extraction effect of the range hood. When the range hood is not in the operating state, the smoke guide plate 3 can be switched to the closed state to prevent oil fume from flowing back when the range hood is not in the operating state, and to prevent dust and mosquitoes from entering the range hood through the range hood inlet.

[0102] When the range hood is an air-conditioning range hood, the smoke guide plate 3 can be switched to the closed position when the air-conditioning module 11 is turned on and the range hood is not sucking oil smoke, thereby avoiding the conflict between the hot air exhausted by the condensing fan 9 and the oil smoke in the cooling mode only, increasing the air volume of the hot air exhausted by the condensing fan 9, and facilitating cooling;

[0103] Secondly, when the smoke guide plate 3 is switched to the closed position, the smoke guide plate 3 can also be visually integrated with the front side of the air inlet section 201, thereby improving the aesthetics of the range hood.

[0104] In one embodiment, the driving mechanism 4 includes a rotation source 401 and a rotation source 401 .

[0105] The rotation source 401 is disposed in the air inlet section 201 . One end of the connecting rod assembly 402 is connected to the rotation source 401 , and the second end of the connecting rod assembly 402 is connected to the smoke guide plate 3 .

[0106] In one embodiment, Figure 6 and Figure 7As shown, the connecting rod assembly 402 includes a first power arm and a second power arm. One end of the first power arm is connected to the power output end of the rotation source 401. The first end of the second power arm is connected to the second end of the first power arm. The second end of the second power arm is hinged to the air deflector. When the rotation source 401 rotates, it can drive the smoke deflector 3 to rotate about the connection between the smoke deflector 3 and the bottom wall of the range hood air inlet 2013, thereby switching between a smoke-guiding position and a closed position.

[0107] In one embodiment, the rotation source 401 may be a device capable of outputting rotation, such as a motor, an engine, a hydraulic motor, or a combination of one of them and a reducer.

[0108] In one embodiment, the smoke guide plate 3 is rotatably connected to the bottom wall of the range hood air inlet 2013 via a hinge. A motion bracket is provided on the smoke guide plate 3, and the second end of the second power arm is hinged to the motion bracket.

[0109] In one embodiment, the effective air inlet height of the smoke hood 2 is L2, 270 mm ≤ L2 ≤ 320 mm.

[0110] In one embodiment, the effective air inlet height of the smoke hood 2 is the distance between the connection between the smoke hood 2 and the wind cabinet 1 and the lower edge of the range hood air inlet 2013.

[0111] The connection between the smoke hood 2 and the wind cabinet 1, as well as the lower edge of the range hood air inlet 2013 are usually flat.

[0112] When at least one of the connection between the smoke hood 2 and the wind cabinet 1 and the lower edge of the range hood air inlet 2013 is always set to a curved surface or irregular shape, the equivalent distance between the two can be calculated by segmented measurement method, projection method and equivalent rectangle method.

[0113] When L2 is within the above range, the vertical height of the fume hood 2 can cover the initial rising area of ​​the oil fume during cooking, ensuring that the oil fume is fully captured.

[0114] The range hood of the present embodiment does not adjust a single parameter. Instead, it uses four parameters—the angle α1 between the second side 2012 and the vertical, the dimension L1 of the second side 20132, the angle α2 between the smoke deflector 3 and the vertical, and the distance L2 between the upper edge and the lower edge of the smoke hood 2—to act as a coordinated optimization design for the entire system. An orthogonal experimental design was conducted for the inclination angle of the second side 2012 of the air inlet section 201 and the dimensions of the range hood's air inlet 2013, constructing multiple experimental schemes. Fluid simulation analysis was used to quantitatively analyze the inlet flow velocity, air volume, and negative pressure zone distribution of each scheme. Analysis of the variation patterns in the simulation results revealed that each parameter had a significant impact on the performance indicators. Furthermore, a single-factor analysis of the inclination angle of the smoke deflector 3 revealed that its effect on the flow field distribution exhibited a clear monotonic variation pattern.

[0115] The inclination angle a1 of the second side 2012 of the fume hood 2 directly influences the location of the negative pressure zone. The dimension L1 of the second side 20132 of the range hood's air inlet 2013 determines the wind speed attenuation characteristics and air volume. The inclination angle of the smoke deflector 3 significantly influences the flow field stability and diversion efficiency. By scientifically matching these key parameters, the range hood of the present invention optimizes the flow field distribution at the range hood's air inlet 2013, effectively expanding the radiation range of the negative pressure zone at the range hood's air inlet 2013 and maximizing its proximity to cooking utensils, thereby achieving efficient collection of cooking fumes.

[0116] It breaks the traditional cognition and design that reducing the thickness and volume of the range hood, especially lowering the height of the smoke collection chamber will inevitably lead to: compression of the effective smoke collection space and flow channel space, a sharp increase in airflow resistance, deterioration of the fan inlet flow field, decreased efficiency, increased noise, difficulty in establishing negative pressure, and a significant reduction in capture efficiency. Technical prejudice.

[0117] Under the premise that the physical space (thickness, volume) is strictly constrained, an efficient internal flow field path is designed through aerodynamic optimization, achieving the design goal of maintaining excellent smoking performance in an ultra-thin and compact body.

[0118] In one embodiment, the range hood further comprises an air conditioning module 5. The air conditioning module 5 is arranged above the air cabinet 1, and a condensation air outlet is provided on the top of the air cabinet 1. The air conditioning module 5 comprises a condensation fan 9 and an evaporation fan 10, and the air outlet of the air conditioning fan is connected to the condensation air outlet.

[0119] In one embodiment, Figure 8 As shown, the air conditioning module 11 11 further includes a condenser, an evaporating fan 10 and an evaporator.

[0120] The air inlet of the condensing fan 9 is positioned toward the condenser. The condensing fan 9 allows air to pass through the condenser. The hot air generated by heat exchange with the condenser is then discharged into the air cabinet 1 through the condensing fan 9 outlet and the condensing air inlet. Finally, the hood fan 8 exhausts the air outdoors along with cooking fumes. The evaporating fan 10 allows air to continuously enter the evaporator's fins for heat exchange, and sends the cooled air indoors, controlling the kitchen temperature to an appropriate range and improving the cooking environment. This allows the indoor air to continuously circulate, achieving the goal of cooling and lowering the temperature.

[0121] In one embodiment, the bottom wall of the main body 202 of the fume hood 2 is inclined upward along the direction from the installation side 12 to the operating side 13 of the range hood.

[0122] In one embodiment, the axis of the range hood fan 8 is tilted upward in a direction from the installation side 12 to the operating side 13 of the range hood.

[0123] In one embodiment, the range hood further includes an oil receiving pan 6 and an oil cup 7 .

[0124] The oil receiving pan 6 is arranged in the fume collecting hood 2 and is located below the range hood fan 8.

[0125] The oil collecting pan 6 is used to collect the filtered liquid grease to prevent the oil from directly entering the range hood or dripping onto the stove.

[0126] When the oil receiving pan 6 is arranged below the range hood fan 8, a negative pressure zone is formed below the range hood fan 8, and the oil receiving pan 6 below can directly receive the dripping grease without the need for an additional oil guide structure.

[0127] The oil cup 7 is provided below the air inlet section 201. The separated oil droplets can fall into the oil cup 7.

[0128] In one embodiment, the range hood is a side suction range hood.

[0129] As a convertible embodiment, in an embodiment not shown in the accompanying drawings, the range hood is a top-side double-suction range hood, and a second air inlet is provided on the bottom wall of the smoke hood 2. The second air inlet can cover the main path of rising smoke, forming a second line of defense to capture escaping smoke.

[0130] To sum up, the range hood of the embodiment of the present invention can break the contradiction between the oil fume suction effect and the aesthetics of the range hood by tilting the second side 2012 of the smoke hood 2 and tilting it inside the range hood air inlet 2013. When the position of the range hood air inlet 2013 is relatively fixed, the negative pressure is more effectively guided to a position close to the source, which significantly improves the capture efficiency. It can achieve excellent smoke capture effect without increasing the height of the smoke chamber or sacrificing the appearance design.

[0131] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope of protection claimed.

Claims

1. A range hood, characterized in that: include: A wind cabinet (1), wherein a range hood fan (8) is provided in the wind cabinet (1); A fume hood (2) comprises a main body (202) and an air inlet section (201), wherein the main body (202) is arranged below the fume cabinet (1) and is in communication with the inner cavity of the fume cabinet (1), and the air inlet section (201) is arranged below the main body (202), and the air inlet section (201) has a first side (2011) and a second side (2012) which are arranged opposite to each other, wherein the first side (2011) is arranged on the installation side (12) of the range hood, and from bottom to top, the second side (2012) is inclined toward the operating side (13) of the range hood, and the range hood air inlet (2013) is provided on the second side (2012); A smoke guide plate (3) is connected to the bottom wall of the range hood air inlet (2013), and the smoke guide plate (3) has a smoke guiding position. When the smoke guide plate (3) is in the smoke guiding position, the smoke guide plate (3) is inclined toward the installation side (12) of the range hood.

2. The range hood according to claim 1, characterized in that: The angle between the second side (2012) and the vertical direction is α1, 15°≤α1≤20°.

3. The range hood according to claim 1, characterized in that: The range hood air inlet (2013) comprises a first side (20131) and a second side (20132) connected at an angle, wherein the first side (20131) extends in a horizontal direction, and the length of the second side (20132) is L1, 90 mm ≤ L1 ≤ 100 mm.

4. The range hood according to any one of claims 1 to 3, characterized in that: The smoke guide plate (3) is a flat plate structure. When the smoke guide plate (3) is in the smoke guiding position, the angle between the smoke guiding surface of the smoke guide plate (3) and the horizontal direction is α2, and 40°≤α2≤70°.

5. The range hood according to claim 4, characterized in that: The smoke guide plate (3) is rotatably connected to the bottom wall of the range hood air inlet (2013); the smoke guide plate (3) also has a closed position; the smoke guide plate (3) is capable of blocking the range hood air inlet (2013) when in the closed position; the range hood further comprises a driving mechanism (4); the driving mechanism (4) is connected to the smoke guide plate (3) and is capable of driving the smoke guide plate (3) to switch between the smoke guiding position and the closed position.

6. The range hood according to claim 5, characterized in that: The driving mechanism (4) comprises: A rotation source (401) is provided in the air inlet section (201); A connecting rod assembly (402), one end of the connecting rod assembly (402) is connected to the rotation source (401), and a second end of the connecting rod assembly (402) is connected to the smoke guide plate (3).

7. The range hood according to any one of claims 1 to 3, characterized in that: The effective air inlet height of the smoke collecting hood (2) is L2, 270mm≤L2≤320mm.

8. The range hood according to any one of claims 1 to 3, characterized in that: Also includes: An air conditioning module (11) is arranged above the wind cabinet (1), and a condensation air outlet is provided on the top of the wind cabinet (1). The air conditioning module (11) includes a condensation fan (9), and the air outlet of the condensation fan (9) is connected to the condensation air outlet.

9. The range hood according to any one of claims 1 to 3, characterized in that: Along the direction from the installation side (12) to the operating side (13) of the range hood, the bottom wall of the main body (202) of the fume hood (2) is inclined upward.

10. The range hood according to any one of claims 1 to 3, characterized in that: Also includes: An oil receiving pan (6) is provided in the fume collecting hood (2) and is located below the fume hood fan (8); and / or, The oil cup (7) is arranged below the air inlet section (201).

Images