Range hood

Abstract

The invention relates to the technical field of household appliances, and discloses a range hood, which comprises an air cabinet, a range hood fan, a range hood and a fan cover, the exhaust fume collecting hood is arranged below the air cabinet and communicated with the inner cavity of the air cabinet, the exhaust fume collecting hood comprises a panel and a bottom wall, the panel is arranged on the operation side of the range hood, the bottom wall is connected to the bottom of the panel, and a first air inlet is formed in the bottom wall; the smoke barrier is arranged below the panel, the smoke barrier is provided with a smoke barrier position, and the smoke barrier can extend downwards when the smoke barrier is located at the smoke barrier position. According to the range hood disclosed by the invention, the smoke baffle can gather oil fume escaping upwards, so that the oil fume is conveniently absorbed by the first air inlet, and the situation that the environment in a kitchen is polluted and the human health is influenced due to further rising and escaping of the oil fume which is not captured is prevented. The panel of the exhaust fume collecting hood extends downwards, the width of the air inlet gap between the bottom of the range hood fan and the bottom wall of the exhaust fume collecting hood can be increased, and then the air volume of the range hood is increased.

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] However, since the range hood needs to discharge the oil smoke into the public flue, the flue resistance is relatively large, causing the air flow rate at the smoke inlet of the range hood to be often lower than the expected flow rate. At the same gear, the actual smoke extraction speed of the smoke inlet is reduced by about 50%, causing a large amount of oil smoke to escape and unable to be completely absorbed by the range hood, and the smoke capture effect of the range hood is not ideal. 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 a large amount of oil smoke escapes during use of the range hood and the oil suction effect is not ideal.

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

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

[0007] The fume hood is provided below the wind cabinet and communicates with the inner cavity of the wind cabinet. The fume hood includes a panel and a bottom wall. The panel is provided on the operating side of the range hood. The bottom wall is connected to the bottom of the panel. The bottom wall is provided with a first air inlet.

[0008] The smoke shield is arranged below the panel and has a smoke shielding position. The smoke shield can tilt downward when it is in the smoke shielding position.

[0009] Beneficial Effects: During use, when the flue resistance of the range hood of the embodiment of the present invention is large, causing the airflow velocity at the range hood's smoke inlet to be lower than expected, the smoke baffle can gather the upwardly escaping smoke, allowing the first air inlet to absorb the smoke. This prevents the uncollected smoke from rising further and escaping, polluting the kitchen environment and affecting human health. The smoke hood is connected to the wind cabinet, and the panel of the smoke hood extends downward, which can increase the width of the air inlet gap between the bottom of the range hood fan and the bottom wall of the smoke hood, thereby helping to increase the air volume of the range hood and improve the smoke extraction effect.

[0010] In an optional embodiment, the distance between the upper edge and the lower edge of the panel is H, 40 mm ≤ H ≤ 60 mm.

[0011] Beneficial effect: When the vertical dimension of the panel is larger, the width of the air inlet gap between the bottom of the range hood fan and the bottom wall of the smoke hood can be increased, thereby helping to increase the air volume of the range hood. After simulation, when the distance between the upper and lower edges of the panel increases from 40mm to 60mm, the air volume of the range hood increases, and the maximum increase is 0.2m 3 However, if the vertical dimension of the panel is too large, it will easily damage the aesthetics of the range hood.

[0012] The distance between the upper edge and the lower edge of the panel in the embodiment of the present invention is set to H, 40mm≤H≤60mm, which can maximize the air volume of the range hood and improve the range hood's oil fume absorption effect without destroying the aesthetics of the range hood.

[0013] In an optional embodiment, the bottom wall of the fume hood is horizontal or inclined upward along the direction from the installation side to the operation side of the range hood.

[0014] Beneficial effect: When the bottom wall of the smoke collection chamber is set to be inclined upward in the direction from the installation side to the operating side of the range hood, the width of the air inlet gap between the range hood fan and the bottom wall of the smoke collection hood can be increased as much as possible without increasing the size of the panel in the vertical direction, thereby increasing the air volume of the range hood.

[0015] In an optional embodiment, the rotation axis of the range hood fan is tilted upward along the direction from the installation side to the operating side of the range hood.

[0016] Beneficial effect: Through such an arrangement, the range hood fan can cooperate with the bottom wall of the inclined smoke collecting hood, thereby forming a wider and uniformly sized air inlet gap between the range hood fan and the bottom wall of the smoke collecting hood.

[0017] In an optional embodiment, the angle between the bottom wall of the smoke hood and the horizontal plane is θ1, 0≤θ1≤15°.

[0018] Beneficial effect: After simulation, when the angle between the bottom wall of the smoke hood and the horizontal plane is 0≤θ1≤15°, after simulation, when the angle θ1 between the bottom wall of the smoke hood and the horizontal plane increases from 0° to 15°, the air volume of the range hood shows an overall increasing trend, with the maximum increase of 0.6m 3 Adjustment of the angle between the bottom wall of the fume hood and the horizontal plane has almost no effect on the full pressure efficiency of the range hood.

[0019] The angle range between the bottom wall of the above-mentioned smoke hood and the horizontal plane is the optimal range obtained after a large number of tests. When θ1 is within the above-mentioned range, the air volume of the range hood can be increased, and there is almost no effect on the total pressure efficiency of the range hood, and the range hood can be ensured to have good aesthetics.

[0020] In an optional embodiment, a dimension of the fume hood from the installation side to the operating side of the range hood is L1, and 330 mm ≤ L1 ≤ 360 mm.

[0021] Beneficial effect: The depth range of the above-mentioned fume hood is the optimal range obtained through a large number of tests. According to simulation, when L1 increases from 330mm to 360mm, the air volume of the range hood increases as a whole, and the maximum increase is 1.1m 3 / min, and has almost no effect on the range hood's full-pressure efficiency. A larger L1 increases the range hood's fan air volume, but excessively large L1 can easily damage the range hood's aesthetics. When L1 is within the above range, the range hood's air volume can be increased without compromising the range hood's visual harmony.

[0022] In an optional embodiment, the included angle between the smoke baffle and the bottom wall of the smoke collecting hood is θ2, 90°≤θ2≤155°; and / or,

[0023] The smoke baffle has a first side and a second side, the first side is connected to the panel, the second side is connected to the first side, and the length of the second side is L2, L2≥100mm.

[0024] Beneficial effect: The above-mentioned value range of θ2 and L2 is the preferred range of the angle of the smoke shield. When θ2 and L2 are within the above-mentioned range, the smoke shield can effectively prevent oil smoke from escaping from the first air inlet at the bottom of the range hood, causing harm to human health.

[0025] In an optional embodiment, the smoke shield is rotatably connected to the bottom of the panel via a driving mechanism, and the smoke shield also has a closed position. The smoke shield can block the first air inlet when in the closed position.

[0026] Beneficial effect: Through such a setting, when the range hood is not in use, the driving mechanism can switch the range hood to the closed position, and then store the smoke baffle to improve the aesthetics of the range hood, and the smoke baffle can block the first air inlet when in the closed position to prevent dust from entering the smoke hood through the first air inlet. When the range hood is a refrigeration hood, the smoke baffle can also be switched to the closed state when the refrigeration hood is in cooling mode, thereby preventing hot air from leaking from the first air inlet, causing an impact on the cooling effect.

[0027] In an optional embodiment, the range hood further includes:

[0028] The condensing fan is installed above the wind cabinet. A condensing air inlet is provided on the top of the wind cabinet. The air outlet of the condensing fan is connected to the condensing air inlet. From the installation side to the operation side of the range hood, the distance between the center of the first air inlet and the panel is L3, 70mm≤L3≤185mm.

[0029] Beneficial effect: Through such a setting, the range hood can be used as a cooling hood. During the operation of the cooling hood, the condensing fan can discharge hot air into the air cabinet through the condensing air inlet, and then the range hood fan takes the hot air away. However, when the range hood enters the cooling and range hood dual-opening mode, or the single range hood mode, the oil smoke entering from the first air inlet and the second air inlet can interact with the airflow entering from the top condensing air inlet, causing interference with the smoke suction of the range hood fan inside the range hood, resulting in affecting the oil smoke extraction effect.

[0030] When the distance between the center of the first air inlet and the panel of the embodiment of the present application is set to the above-mentioned position, it is coordinated with the setting angle of the smoke shield, so that the oil smoke entering the first air inlet and the second air inlet can avoid the influence of the airflow of the condensation air inlet, ensuring that there is no obvious loss in the smoking effect, and when the smoke shield is switched to the closed position, the first air inlet can be blocked by the smoke shield.

[0031] In an optional embodiment, the smoke exhaust fan is provided with a first fan inlet and a second fan inlet, and the smoke collecting hood includes:

[0032] a first air duct cavity, the first air duct cavity being connected to the first fan inlet and the first air inlet;

[0033] The second air duct cavity is arranged on the installation side of the range hood and is at least partially located below the first air duct cavity. A second air inlet is provided on the smoke collecting hood. The second air duct cavity is connected to the second fan inlet and the second air inlet.

[0034] Beneficial Effect: This arrangement allows the second air inlet to be closer to the stovetop, quickly intercepting initial smoke before it spreads. The first air inlet can cover the main path of rising smoke, forming a second line of defense to capture escaping smoke. Furthermore, in the embodiment of the present application, the dimension L1 of the fume hood from the installation side to the operating side of the range hood is set to 330mm≤L1≤360mm. This ensures the air volume of the range hood while avoiding the second air duct cavity being too deep, which would be visually inconsistent when combined with the first air duct cavity.

[0035] The range hood of the embodiment of the present application can combine the top suction and side suction modes to more effectively handle the oil smoke generated during cooking.

[0036] In an optional embodiment, the fume hood comprises:

[0037] The first smoke guide plate is arranged on the side of the second air duct cavity close to the operating side and is connected to the bottom wall of the smoke collecting hood. The second air inlet is arranged at the lower part of the first smoke guide plate. From bottom to top, the first smoke guide plate is inclined toward the operating side of the range hood.

[0038] Beneficial effect: The inclined first smoke guide plate can form a self-cleaning slope, guiding the condensed oil droplets to slide down along the plate surface to the oil collecting tank, thereby reducing the accumulation of oil and dirt at the edge of the second air inlet, and because the first smoke guide plate itself is located at the upper rear of the stove, when the first smoke guide plate is set to tilt from top to bottom toward the operating side of the range hood, the first smoke guide plate can be directly aligned with the oil smoke injection trajectory, thereby promoting the second air duct cavity to capture the oil smoke.

[0039] In an optional embodiment, the range hood further includes:

[0040] The second smoke guide plate is connected to the bottom wall of the second air inlet, and is inclined from top to bottom toward the operating side of the range hood.

[0041] Beneficial effect: When the range hood is working, the second smoke guide plate is in a smoke guiding state, and from top to bottom, the second smoke guide plate is inclined toward the operating side of the range hood.

[0042] When the range hood stops working, the second smoke guide plate can be switched to a closed state, thereby closing the second air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] 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.

[0044] Figure 1 This is a side schematic diagram of a range hood according to an embodiment of the present invention;

[0045] Figure 2 A side cross-sectional view of a range hood according to an embodiment of the present invention;

[0046] Figure 3 This is a three-dimensional diagram of a range hood according to an embodiment of the present invention at an angle;

[0047] Figure 4 is a three-dimensional diagram of a range hood according to an embodiment of the present invention from another angle;

[0048] Figure 5 A side cross-sectional view of a range hood according to an embodiment of the present invention;

[0049] Figure 6 for Figure 5 An enlarged schematic diagram of a range hood at point A shown in FIG;

[0050] Figure 7A simulated velocity vector diagram of a range hood according to an embodiment of the present invention;

[0051] Figure 8 A schematic diagram illustrating the effect of the bottom wall of the fume hood of a range hood on the air volume of the range hood according to an embodiment of the present invention;

[0052] Figure 9 A schematic diagram illustrating the effect of the bottom wall of the fume hood of a range hood on the total pressure efficiency of the range hood according to an embodiment of the present invention;

[0053] Figure 10 A schematic diagram illustrating the effect of the vertical dimension of a range hood panel on the air volume of the range hood according to an embodiment of the present invention;

[0054] Figure 11 A schematic diagram showing the effect of the vertical dimension of the range hood panel on the total pressure efficiency of the range hood according to an embodiment of the present invention;

[0055] Figure 12 A schematic diagram illustrating the effect of the depth of the fume hood of a range hood on the air volume of the range hood according to an embodiment of the present invention;

[0056] Figure 13 Schematic diagram showing the effect of the depth of the fume hood of a range hood on the total pressure efficiency of the range hood according to an embodiment of the present invention.

[0057] Description of reference numerals:

[0058] 1. Wind cabinet; 101. Condensation air inlet;

[0059] 2. Smoke hood; 201. Panel; 202. Bottom wall; 203. First air inlet; 204. First air duct cavity; 205. Second air duct cavity; 206. Second air inlet; 207. First smoke guide plate; 208. Second smoke guide plate;

[0060] 3. Smoke shield; 301, first side; 302, second side;

[0061] 4. Smoke hood fan; 401, first fan inlet; 402, second fan inlet;

[0062] 5. Driving mechanism; 501. Motor; 502. Connecting rod assembly. DETAILED DESCRIPTION

[0063] 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.

[0064] Range hoods are a popular household appliance in modern kitchens, absorbing cooking fumes and preventing them from polluting the environment and causing health problems. As an innovative design in modern kitchen equipment, dual-suction range hoods are designed to more effectively handle cooking fumes by combining both top and side suction modes. However, existing dual-suction range hoods have the following issues:

[0065] 1. When a large amount of high-speed oil smoke is generated during stir-frying in a pan, it is easy to escape and cannot be completely sucked into the side and bottom air inlets. The top air intake is needed to capture the escaping oil smoke. Actual tests have found that in a real kitchen environment, the top air intake of the existing top-side double-extraction range hood is still unable to completely absorb the escaping oil smoke, causing the oil smoke to escape and affect human health.

[0066] 2. There is no theoretical basis for the design of the size of the top smoke extraction cavity of the top-side double-suction range hood. In order to avoid hitting the head, the cavity depth is generally designed to be shorter than the top-suction type, but being too short is not conducive to smoke collection.

[0067] The following combination Figures 1 to 13 , describing embodiments of the present invention.

[0068] According to an embodiment of the present invention, on the one hand, a range hood is provided, comprising a fume cabinet 1 , a fume collecting hood 2 and a fume baffle 3 .

[0069] The range hood fan 4 is installed within the air cabinet 1. A fume hood 2 is located below the range hood 1 and communicates with the interior of the range hood 1. The fume hood 2 includes a panel 201 and a bottom wall 202. The panel 201 is located on the operating side of the range hood. The bottom wall 202 is connected to the bottom of the panel 201 and is provided with a first air inlet 203. A smoke shield 3 is located below the panel 201 and has a smoke-blocking position. When in this position, the smoke shield 3 can tilt downward.

[0070] During use of the range hood according to the present invention, if the flue resistance is high, causing the airflow velocity at the range hood's smoke inlet to be lower than expected, the smoke baffle 3 can gather the upwardly escaping smoke, allowing the first air inlet 203 to absorb the smoke. This prevents the uncollected smoke from rising further and escaping, polluting the kitchen environment and affecting human health. The smoke hood 2 is connected to the air cabinet 1, and the panel 201 of the smoke hood 2 extends downward, which can increase the width of the air inlet gap between the bottom of the range hood fan 4 and the bottom wall 202 of the smoke hood 2, thereby helping to increase the air volume of the range hood and improve the smoke extraction effect.

[0071] Among them, the operating side of the range hood is the side of the range hood facing the user during use for human-computer interaction, and the installation side of the range hood is the side of the range hood used to connect to the wall during use.

[0072] In one embodiment, Figure 1 As shown, the distance between the upper edge and the lower edge of the panel 201 is H, 40mm≤H≤60mm.

[0073] When the size of the panel 201 in the vertical direction is large, the width of the air inlet gap between the bottom of the range hood fan 4 and the bottom wall 202 of the smoke hood 2 can be increased, thereby helping to increase the air volume of the range hood. After simulation, as shown in FIG. Figure 10 and Figure 11 As shown in FIG. 2 , when the distance between the upper edge and the lower edge of the panel 201 increases from 40 mm to 60 mm, the air volume of the range hood increases, and the maximum increase is 0.2 mm. 3 However, if the size of the panel 201 in the vertical direction is too large, it will easily damage the aesthetics of the range hood.

[0074] The distance between the upper edge and the lower edge of the panel 201 in the embodiment of the present invention is H, 40mm≤H≤60mm, which can maximize the air volume of the range hood and improve the range hood's oil fume absorption effect without destroying the aesthetics of the range hood.

[0075] In a preferred embodiment, the distance H between the upper edge and the lower edge of the panel 201 is 60 mm.

[0076] The applicant simulated the air volume and total pressure efficiency of the range hood with different distances between the upper and lower edges of the panel 201, and recorded the data as follows:

[0077] H / mm <![CDATA[Air volume m 3 / min]]> Full pressure efficiency% 40 29.45 41.25 50 29.55 40.46 60 29.67 41.19

[0078] In one embodiment, the range hood fan 4 includes a volute, an impeller, an oil receiving pan, a check valve and other structures.

[0079] In one embodiment, along the direction from the installation side to the operating side of the range hood, the bottom wall 202 of the fume collecting hood 2 is horizontal or inclined upward.

[0080] When the bottom wall 202 of the smoke collecting chamber is set to be inclined upward from the installation side to the operating side of the range hood, the width of the air inlet gap between the range hood fan 4 and the bottom wall 202 of the smoke collecting hood 2 can be increased as much as possible without increasing the size of the panel 201 in the vertical direction, thereby increasing the air volume of the range hood.

[0081] In one embodiment, the rotation axis of the range hood fan 4 is tilted upward along the direction from the installation side to the operation side of the range hood.

[0082] By such arrangement, the range hood fan 4 can cooperate with the inclined bottom wall 202 of the smoke collecting hood 2 , thereby forming a relatively wide and uniformly sized air inlet gap between the range hood fan 4 and the bottom wall 202 of the smoke collecting hood 2 .

[0083] In a preferred embodiment, the extension direction of the rotation axis of the range hood fan 4 is parallel to the bottom wall 202 of the smoke collecting hood 2 .

[0084] As a convertible implementation, in an embodiment not shown in the drawings, the rotation axis of the range hood fan 4 extends in the horizontal direction.

[0085] In one embodiment, the angle between the bottom wall 202 of the fume hood 2 and the horizontal plane is θ1, where 0≤θ1≤15°.

[0086] The angle range between the bottom wall 202 of the smoke hood 2 and the horizontal plane is the best range obtained through a large number of tests, such as Figure 8 and Figure 9 As shown in the simulation, when the angle θ1 between the bottom wall 202 of the smoke hood 2 and the horizontal plane increases from 0° to 15°, the air volume of the range hood increases as a whole, with the maximum increase of 0.6m 3 Adjustment of the angle between the bottom wall 202 of the fume hood 2 and the horizontal plane has almost no effect on the total pressure efficiency of the range hood.

[0087] When θ1 is within the above range, the air volume of the range hood can be increased, with almost no impact on the total pressure efficiency of the range hood, and the range hood can be ensured to have good aesthetics.

[0088] The applicant simulated the air volume and total pressure efficiency of the range hood when θ1 was at different angles, and recorded the data as follows:

[0089]

[0090] In a preferred embodiment, θ1 = 12°, which can ensure that the air volume of the range hood is increased to the maximum extent without affecting the aesthetics of the range hood.

[0091] In one embodiment, the horizontal dimension of the fume hood is L1, 330 mm ≤ L1 ≤ 360 mm.

[0092] The size range of the smoke hood 2 is the best range obtained through a lot of experiments, such as Figure 12 and Figure 13 As shown in the simulation, when L1 increases from 330mm to 360mm, the range hood air volume shows an overall increasing trend, and the maximum increase is 1.1m 3 / min, and has almost no effect on the range hood's total pressure efficiency. As L1 increases, the air volume of the range hood fan 4 increases. However, excessively large L1 can easily damage the range hood's aesthetics. When L1 is within the above range, the range hood's air volume can be increased without damaging the range hood's visual harmony.

[0093] The applicant simulated the air volume and total pressure efficiency of the range hood under different L1 conditions, and recorded the data as follows:

[0094] L1 / mm <![CDATA[Air volume m 3 / min]]> Full pressure efficiency% 343 28.96 41.08 350 29.4 40.92 360 30.06 42.10

[0095] In a preferred embodiment, L1 = 360 mm.

[0096] In one embodiment, the included angle between the smoke baffle 3 and the bottom wall 202 of the smoke collecting hood 2 is θ2, 90°≤θ2≤155°.

[0097] The value range of θ2 is the preferred range of the angle of the smoke shield 3. When θ2 is within the above range, the smoke shield 3 can effectively prevent oil smoke from escaping from the first air inlet 203 at the bottom of the range hood, causing harm to human health.

[0098] In one embodiment, Figure 1 As shown, the smoke baffle 3 has a first side 301 and a second side 302 , the first side 301 is connected to the panel 201 , the second side 302 is connected to the first side 301 , and the length of the second side 302 is L2 ≥ 100 mm.

[0099] The value range of L2 mentioned above is the preferred range of the size of the smoke shield 3. When L2 is within the above range, the smoke shield 3 can effectively prevent oil smoke from escaping from the first air inlet 203 at the bottom of the range hood, causing harm to human health.

[0100] The value range of θ2 is the preferred range of the angle of the smoke shield 3. When θ2 is within the above range, the smoke shield 3 can effectively prevent oil smoke from escaping from the first air inlet 203 at the bottom of the range hood, causing harm to human health.

[0101] In one embodiment, the smoke shield 3 is rotatably connected to the bottom of the panel 201 through the driving mechanism 5. The smoke shield 3 also has a closed position. The smoke shield 3 can block the first air inlet 203 when in the closed position.

[0102] Through such an arrangement, when the range hood is not in use, the driving mechanism 5 can switch the smoke deflector 3 to the closed position, and then store the smoke deflector 3 to improve the aesthetics of the range hood, and the smoke deflector 3 can block the first air inlet 203 when in the closed position to prevent dust from entering the smoke hood 2 through the first air inlet 203. When the range hood is a refrigeration hood, the smoke deflector 3 can also be switched to the closed state when the refrigeration hood is in cooling mode, thereby preventing hot air from leaking from the first air inlet 203 and affecting the cooling effect.

[0103] In one embodiment, Figure 5 and Figure 6 As shown, the driving mechanism 5 includes a motor 501 and a connecting rod assembly 502. When smoking is required, the motor 501 drives the connecting rod assembly 502 to drive the smoke shield 3 to rotate away from the bottom wall 202 of the smoke collecting hood 2, thereby lifting the smoke shield 3.

[0104] When the range hood finishes working, the motor 501 drives the connecting rod assembly 502 to drive the smoke baffle 3 to rotate in the opposite direction and return to the original position.

[0105] The connecting rod assembly 502 is preferably, but not limited to, a three-link mechanism.

[0106] As a convertible implementation, in an embodiment not shown in the drawings, the driving mechanism 5 can also be selected as a device capable of outputting rotation, such as an engine, a hydraulic motor, or a combination of one of them and a reducer.

[0107] In one embodiment, the driving mechanism 5 is disposed in the smoke hood 2 and is located on one side of the panel 201 . By so configuring, the panel 201 can not only increase the width of the air inlet gap, but also provide space for the installation of the driving mechanism 5 .

[0108] In one embodiment, the condensing fan is arranged above the air cabinet 1, and a condensing air inlet 101 is provided on the top of the air cabinet 1, and the air outlet of the condensing fan is connected to the condensing air inlet 101; along the direction from the installation side to the operation side of the range hood, the distance between the center of the first air inlet 203 and the panel 201 is L3, 70mm≤L3≤185mm.

[0109] Through such a setting, the range hood can be used as a cooling hood. During the operation of the cooling hood, the condensing fan can discharge hot air into the wind cabinet 1 through the condensing air inlet 101, and the hot air is then taken away by the range hood fan 4. However, when the range hood enters the cooling and range hood dual-opening mode, or the single range hood mode, the oil smoke entering from the first air inlet 203 and the second air inlet 206 can interact with the airflow entering from the top condensing air inlet 101, causing interference with the smoke suction of the range hood fan 4 inside the range hood, resulting in affecting the oil smoke extraction effect.

[0110] From the attached Figure 7 It can be seen that a downward high-temperature hot air flow is formed between the first air inlet 203 of the range hood fan 4 inside the wind cabinet 1 and the wind cabinet 1, which can easily affect the smoke entering the first air inlet 203. When the distance between the center of the first air inlet 203 and the panel 201 in the embodiment of the present application is set to the above-mentioned position, the oil smoke entering the first air inlet 203 can avoid the influence of the airflow of the condensation air inlet 101, ensuring that there is no obvious loss in the smoking effect, and when the smoke shield 3 is switched to the closed position, the first air inlet 203 can be blocked by the smoke shield 3.

[0111] In one embodiment, the range hood fan 4 is provided with a first fan inlet 401 and a second fan inlet 402 , and the smoke collecting hood 2 includes a first air duct cavity 204 and a second air duct cavity 205 .

[0112] The first air duct cavity 204 connects the first fan inlet 401 and the first air inlet 203. The second air duct cavity 205 is provided on the installation side of the range hood and is at least partially located below the first air duct cavity 204. The fume hood 2 is provided with a second air inlet 206. The second air duct cavity 205 connects the second fan inlet 402 and the second air inlet 206.

[0113] With this arrangement, the second air inlet 206 can be closer to the stovetop, quickly intercepting the initial oil smoke before it spreads. The first air inlet 203 can cover the main path of oil smoke rising, forming a second line of defense to capture escaping oil smoke. In the embodiment of the present application, the dimension L1 of the fume hood 2 along the direction from the installation side to the operating side of the range hood is set to 330mm≤L1≤360mm. This can ensure the air volume of the range hood while avoiding the depth of the second air duct cavity 205 being too deep, which would be visually inconsistent when combined with the first air duct cavity 204.

[0114] The range hood of the embodiment of the present application can combine the top suction and side suction modes to more effectively handle the oil smoke generated during cooking.

[0115] In one embodiment, the first fan inlet 401 is a front air inlet, and the second fan inlet is a rear air inlet.

[0116] In one embodiment, the fume hood 2 includes a first smoke guide plate 207. The first smoke guide plate 207 is disposed on a side of the second air duct cavity 205 close to the operating side and is connected to the bottom wall 202 of the fume hood 2. The second air inlet 206 is disposed below the first smoke guide plate 207. From bottom to top, the first smoke guide plate 207 is inclined toward the operating side of the range hood.

[0117] The inclined first smoke guide plate 207 can form a self-cleaning slope, guiding the condensed oil droplets to slide down along the plate surface to the oil collecting tank, thereby reducing the accumulation of oil and dirt at the edge of the second air inlet 206. Since the first smoke guide plate 207 itself is located at the upper rear of the stove, when the first smoke guide plate 207 is set to tilt from top to bottom toward the operating side of the range hood, the first smoke guide plate 207 can be directly aligned with the oil smoke injection trajectory, thereby promoting the second air duct cavity 205 to capture the oil smoke.

[0118] In one embodiment, the range hood further includes a second smoke guide plate 208. The second smoke guide plate 208 is connected to the bottom wall 202 of the second air inlet 206, and is inclined from top to bottom toward the operating side of the range hood.

[0119] By such arrangement, the second smoke guide plate 208 can guide the oil smoke to enter the second air duct cavity 205 from the second air inlet 206 .

[0120] In one embodiment, the second smoke guide plate 208 is rotatably connected to the bottom wall 202 of the second air inlet 206 via a rotation source, and has a smoke guiding state and a closed state.

[0121] When the range hood is in operation, the second smoke guide plate 208 is in a smoke guiding state, and from top to bottom, the second smoke guide plate 208 is inclined toward the operating side of the range hood.

[0122] When the range hood stops working, the second smoke guide plate 208 can be switched to a closed state, thereby sealing the second air inlet 206 .

[0123] The rotation source may be a device capable of outputting rotation, such as the motor 501, an engine, a hydraulic motor, or a combination of one of them and a reducer.

[0124] In summary, when the flue resistance of the range hood of the embodiment of the present invention is large, causing the airflow velocity at the range hood's smoke inlet to be lower than the expected flow rate, the smoke baffle 3 can gather the upwardly escaping oil smoke so that the first air inlet 203 can absorb the oil smoke, preventing the oil smoke from rising further and escaping without being captured, thereby polluting the kitchen environment and affecting human health. The smoke hood 2 is connected to the wind cabinet 1, and the panel 201 of the smoke hood 2 extends downward, which can increase the width of the air inlet gap between the bottom of the range hood fan 4 and the bottom wall 202 of the smoke hood 2, thereby helping to increase the air volume of the range hood and improve the oil smoke extraction effect.

[0125] 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 shall fall within the scope of protection claimed by the present invention.

Claims

1. A range hood, characterized in that: include: A wind cabinet (1), wherein a range hood fan (4) is provided in the wind cabinet (1); A fume hood (2) is provided below the wind cabinet (1) and is in communication with the inner cavity of the wind cabinet (1); the fume hood (2) comprises a panel (201) and a bottom wall (202); the panel (201) is provided on the operating side of the range hood; the bottom wall (202) is connected to the bottom of the panel (201); and a first air inlet (203) is provided on the bottom wall (202); A smoke shield (3) is provided below the panel (201); the smoke shield (3) has a smoke shielding position; and the smoke shield (3) can extend downward when in the smoke shielding position.

2. The range hood according to claim 1, characterized in that: The distance between the upper edge and the lower edge of the panel (201) is H, 40mm≤H≤60mm.

3. The range hood according to claim 1, characterized in that: In the direction from the installation side to the operating side of the range hood, the bottom wall (202) of the fume hood (2) is horizontal or inclined upward.

4. The range hood according to claim 3, characterized in that: In the direction from the installation side to the operating side of the range hood, the rotating shaft of the range hood fan (4) is inclined upward.

5. The range hood according to claim 3, characterized in that: The angle between the bottom wall (202) of the smoke collecting hood (2) and the horizontal plane is θ1, 0≤θ1≤15°.

6. The range hood according to any one of claims 1 to 5, characterized in that: The dimension of the fume hood (2) from the installation side to the operating side of the range hood is L1, 330 mm ≤ L1 ≤ 360 mm.

7. The range hood according to any one of claims 1 to 5, characterized in that: The included angle between the smoke baffle (3) and the bottom wall (202) of the smoke collecting hood (2) is θ2, 90°≤θ2≤155°; and / or, The smoke shield (3) has a first side (301) and a second side (302), wherein the first side (301) is connected to the panel (201), and the second side (302) is connected to the first side (301), and the length of the second side (302) is L2, and L2 is ≥100 mm.

8. The range hood according to any one of claims 1 to 5, characterized in that: The smoke shield (3) is rotatably connected to the bottom of the panel (201) via a driving mechanism (5), and the smoke shield (3) also has a closed position. When in the closed position, the smoke shield (3) can block the first air inlet (203).

9. The range hood according to any one of claims 1 to 5, characterized in that: Also includes: A condensing fan is arranged above the wind cabinet (1); a condensing air inlet (101) is provided on the top of the wind cabinet (1); an air outlet of the condensing fan is connected to the condensing air inlet (101); in the direction from the installation side to the operation side of the range hood, the distance between the center of the first air inlet (203) and the panel (201) is L3, 70mm≤L3≤185mm.

10. The range hood according to any one of claims 1 to 5, characterized in that: The smoke exhaust fan (4) is provided with a first fan inlet (401) and a second fan inlet (402), and the smoke collecting hood (2) comprises: a first air duct cavity (204), the first air duct cavity (204) being in communication with the first fan inlet (401) and the first air inlet (203); A second air duct cavity (205) is provided on the installation side of the range hood and is at least partially located below the first air duct cavity (204); a second air inlet (206) is provided on the fume hood (2); and the second air duct cavity (205) is connected to the second fan inlet (402) and the second air inlet (206).

11. The range hood according to claim 10, characterized in that: The smoke collecting hood (2) comprises: The first smoke guide plate (207) is arranged on a side of the second air duct cavity (205) close to the operating side and is connected to the bottom wall (202) of the smoke collecting hood (2). The second air inlet (206) is arranged on the first smoke guide plate (207). From bottom to top, the first smoke guide plate (207) is inclined toward the operating side of the range hood.

12. The range hood according to claim 10, characterized in that: Also includes: The second smoke guide plate (208) is connected to the bottom wall (202) of the second air inlet (206), and the second smoke guide plate (208) is inclined from top to bottom toward the operating side of the range hood.

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