Range hood

Abstract

The utility model discloses a range hood which comprises a shell, a fan system 2 arranged in the shell and an exhaust fume collecting hood arranged at the bottom of the shell, an exhaust fume collecting cavity is formed in the exhaust fume collecting hood, and an exhaust fume suction opening is formed in at least one wall surface forming the exhaust fume collecting cavity; the thickness of the exhaust fume collecting hood is k; the parameters meet the following relation: k is less than or equal to 50mm.

Description

Technical Field

[0001] The utility model relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They typically come in two types: top-draft and side-draft. Top-draft range hoods are increasingly popular due to their compactness, lightness, and minimal footprint. They typically consist of a hood, a fan housing located above the hood, and a volute, impeller, and motor that drives the impeller.

[0003] The current top-suction range hood, such as the range hood disclosed in the Chinese patent application number 202121836163.5 of the present applicant, includes a smoke collection hood and a fan rack for setting up a fan system. A smoke collection cavity is formed at the bottom of the smoke collection hood, which is recessed upward from the bottom. An air inlet is provided in the smoke collection hood above the smoke collection cavity, and the fan rack is arranged above the smoke collection hood.

[0004] This type of range hood features an air inlet that covers the entire hood, creating a wide negative pressure zone and reducing the escape of oil fumes. However, because the width of the air duct at the air inlet is much wider than the width of the fan frame, and the smoke collection chamber is far from the fan system within the fan frame, oil fumes are not effectively drawn into the fan system after being gathered in the smoke collection chamber. Therefore, further improvements are needed. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a range hood that shortens the oil smoke path and promotes oil smoke inhalation in view of the deficiencies in the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: a range hood comprising a housing, a fan system arranged in the housing, and a smoke collecting hood arranged at the bottom of the housing, wherein a smoke collecting cavity is formed on the smoke collecting hood, and a smoke outlet is formed on at least one wall surface constituting the smoke collecting cavity;

[0007] The thickness of the smoke hood is k; it is characterized in that:

[0008] The above parameters satisfy the following relationship:

[0009] k≤50mm.

[0010] Since the thickness of the smoke hood is relatively small, it meets the requirements of a light and beautiful appearance, and thus the distance between the smoke inlet side of the smoke collection chamber and the fan system is shorter, that is, the path of the oil smoke from contacting the smoke hood to being sucked into the fan system is shorter, the oil smoke flow loss is small, and the oil smoke can be sucked into the fan system at a faster flow rate.

[0011] Preferably, the width of the smoke hood in the left-right direction is d1, the width of the shell bottom is d2, the depth of the smoke hood in the front-back direction is S1, the depth of the shell bottom is S2, and the above parameters satisfy the following relationship: d2<d1, S2≤S1.

[0012] Since the smoke hood is relatively thin, the space inside the hood becomes smaller, the smoke collection ability becomes worse, and oil smoke easily escapes. In this case, the defect caused by the small thickness of the smoke hood can be improved by reasonably setting the relationship between the depth and width of the smoke hood and the corresponding dimensions of the range hood shell. Specifically, the depth of the smoke hood is greater than the shell, and the width of the smoke hood is also greater than the shell. This can make up for the defect of the smaller space inside the smoke hood caused by the small thickness in the vertical direction, ensure a larger smoke collection space in the horizontal direction (width and depth), thereby ensuring the smoke control ability at the front and left and right sides, and reducing the escape of oil smoke from the front and left and right sides.

[0013] More preferably, the parameters of the fume hood and the bottom of the housing also satisfy the following relationship:

[0014] Therefore, 1) by further reasonably setting the ratio of the depth and width of the fume hood to the corresponding dimensions of the range hood housing, the defects caused by the small thickness of the fume hood can be improved, forming a synergistic relationship with the thickness:

[0015] Specifically, the depth of the smoke hood is close to that of the shell, and the depth ratio of the shell to the smoke hood is limited to After passing through the smoke collecting chamber, the oil smoke will be concentrated in the area corresponding to the fan system, and can be quickly sucked into the fan system without being gathered to the fan system from a distance far away from the fan system in the depth direction, thus shortening the oil smoke path. As a result, the oil smoke suction effect can be improved even when the overall volume of the smoke hood is small. In the case that the smoke collection capacity is insufficient due to the small thickness of the smoke hood, the depth of the smoke hood cannot be too small. When the size of the smoke hood is fixed, if the shell size is too small, the extension of the smoke outlet to the front side is small, that is, the negative pressure on the front side is too small, which will cause smoke to escape from the front side; in addition, the depth of the smoke hood is close to the shell, that is, it is smaller than the existing ones, which can match most cabinets on the market, thus meeting the needs of new installation and replacement;

[0016] At the same time, the width of the smoke hood is relatively small compared to the shell, and the width ratio of the shell to the smoke hood is limited to Compared with the existing technology with a width close to the shell, the present application can concentrate the negative pressure area to compensate for the insufficient smoke collection capacity caused by the small thickness of the smoke hood. When the oil smoke is captured by the smoke hood, the area is concentrated and the negative pressure is large, further reducing the flow loss; if Under the same conditions, the shell of the smoke hood is too small, that is, the smoke outlet is far away from the burners on both sides, and the diffusion of negative pressure to both sides is limited, which will weaken the smoke control ability on both sides and easily cause smoke to escape on both sides. Under the same conditions as the smoke hood, the shell is larger. Although the negative pressure extends to both sides, the area of the smoke outlet increases, and the effect of the negative pressure gathering to the center is weakened.

[0017] 2) Although the width and depth design of the smoke hood can reduce the defects caused by the thickness of the smoke hood to a certain extent, the smoke collection range is limited due to the small depth of the smoke hood and the relatively small width of the smoke hood relative to the outer shell. Therefore, the smoke collection capacity is still insufficient. For this reason, a smoke collection cavity is designed on the smoke hood to help concentrate the oil smoke and then guide it into the fan system of the outer shell, so that the oil smoke can be sucked into the fan system in a more concentrated state and a shorter path.

[0018] In the above, different proportional relationships are defined in the thickness, width and depth of the smoke hood to produce a synergistic and complementary effect, so that the smoke hood can better cooperate with the fan to achieve more concentrated negative pressure, shorter oil fume path, smaller flow loss, and a light and compact appearance.

[0019] Furthermore, the fume hood can be raised and lowered relative to the fan system, so that in situations where there is a large amount of oil smoke, by lowering the fume hood, the negative pressure area can be lowered and brought closer to the smoke source, thereby reducing the escape of oil smoke.

[0020] Preferably, in order to facilitate the lifting and lowering of the smoke hood and avoid oil smoke leakage between the smoke hood and the outer shell, the outer shell includes a first shell and a second shell, the first shell at least partially covers the outer periphery of the second shell and is at least partially located below the second shell, the first shell can be lifted up and down relative to the second shell, and the bottom of the outer shell is the bottom of the first shell.

[0021] Furthermore, in order to meet the requirements of oil fume filtration, a first ventilation component is provided at the smoke outlet, and a second ventilation component is provided at the bottom of the second shell. Therefore, when the first ventilation component descends relative to the second ventilation component along with the smoke collection hood, the air intake resistance can be reduced and the air intake area can be increased.

[0022] Furthermore, the smoke collecting chamber at least partially extends into the housing. The smoke collecting chamber extends into the housing where the fan system is arranged, and the top of the smoke collecting chamber is close to the fan system, thereby reducing the diffusion of oil smoke after flowing out of the smoke collecting chamber.

[0023] Furthermore, in order to meet the needs of oil fume filtration, a first ventilation component is provided at the smoke outlet, and a second ventilation component is provided in the outer shell. The first ventilation component and the second ventilation component can be raised and lowered relative to each other. Therefore, when the first ventilation component descends relative to the second ventilation component along with the smoke collecting hood, the air intake resistance can be reduced and the air intake area can be increased.

[0024] Furthermore, the outer shell includes a first shell and a second shell, the first shell at least partially covers the outer periphery of the second shell and is at least partially located below the second shell, the second ventilation component is arranged on the second shell, and on the oil fume flow path, the second ventilation component is arranged upstream of the fan system, and the first shell can move up and down relative to the second shell, thereby eliminating the need to set a motion mechanism for lifting the first ventilation component, thereby simplifying the overall structure of the machine.

[0025] Furthermore, the second ventilation component is a filter, which is connected to the bottom of the second shell. Thus, the second ventilation component can also receive the oil flowing down the wall of the second shell, thereby preventing the oil on the wall of the second shell from dripping through the first ventilation component when the distance between it and the first ventilation component is increased.

[0026] Preferably, the smoke collecting chamber is formed in such a manner that the smoke collecting hood includes a front side wall, a rear side wall, a left side wall and a right side wall that enclose the smoke collecting chamber, the front side wall gradually extends upwardly and obliquely from the front to the rear, the rear side wall gradually extends downwardly and obliquely from the rear end portion of the front side wall to the rear, the left side wall is located at the left end portions of the front side wall and the rear side wall, the right side wall is located at the right end portions of the front side wall and the rear side wall, and the smoking port is formed on at least one of the front side wall, the rear side wall, the left side wall and the right side wall;

[0027] The front end of the front side wall is located in front of the front bottom of the shell, the left end of the left side wall is located on the left side of the left bottom of the shell, and the right end of the right side wall is located on the right side of the right bottom of the shell.

[0028] Furthermore, to ensure the smoke-collecting effect of the smoke collecting chamber, the angle between the front side wall and the horizontal direction is β, the depth of the smoke collecting chamber in the front-to-back direction is S, and the following relationship is satisfied: S≥280mm, β≥25°.

[0029] Furthermore, to ensure the oil guiding effect, the angle between the rear side wall and the horizontal direction is γ, and satisfies γ≥12°.

[0030] Furthermore, the axis of the fan system extends in the front-to-back direction, and the left side wall and the right side wall extend obliquely toward each other from bottom to top, which can further enhance the effect of the smoke collecting chamber in guiding and gathering oil smoke from the left and right sides, and match the arrangement of the fan system, thereby better enhancing the oil smoke absorption effect.

[0031] Compared with the prior art, the advantages of the present invention are:

[0032] 1) Since the thickness of the smoke hood is small, it meets the requirements of light and beautiful appearance, and thus makes the distance between the smoke inlet side of the smoke collection chamber and the fan system shorter, that is, the path of oil smoke from contacting the smoke hood to being sucked into the fan system is shorter, the flow loss of oil smoke is small, and the oil smoke can be sucked into the fan system at a faster flow rate.

[0033] 2) Due to the small thickness of the fume hood, the space inside the hood becomes smaller, the smoke collection ability becomes worse, and the oil smoke is easy to escape. In this case, the reasonable setting of the ratio of the depth and width of the fume hood to the corresponding dimensions of the range hood shell can improve the defects caused by the small thickness of the fume hood, forming a synergistic relationship with the thickness:

[0034] Specifically, the depth of the smoke hood is close to that of the shell, and the depth ratio of the shell to the smoke hood is limited to The oil smoke can be concentrated in the area corresponding to the fan system after passing through the smoke collecting chamber, and can be quickly sucked into the fan system without being gathered to the fan system from a distance away from the fan system in the depth direction, thereby shortening the oil smoke path, thereby improving the oil smoke suction effect even when the overall volume of the smoke hood is small; when the smoke collection capacity is insufficient due to the small thickness of the smoke hood, the depth of the smoke hood cannot be too small. When S2 / S1 is less than 5 / 7, under the condition of a certain size of the smoke hood, the shell size is too small, the extension of the smoke outlet to the front side is too small, that is, the negative pressure on the front side is too small, which will cause smoke to escape from the front side; in addition, the depth of the smoke hood is close to the shell, that is, it is smaller than the existing one, and can match most cabinets on the market, thereby meeting the needs of new installation and replacement;

[0035] At the same time, the width of the smoke hood is relatively small compared to the shell, and the width ratio of the shell to the smoke hood is limited to Compared with the existing technology with a relative width close to the shell, the present application can concentrate the negative pressure area to make up for the insufficient smoke collection ability due to the small thickness of the smoke hood. When the oil smoke is captured by the smoke hood, the area is concentrated and the negative pressure is large, further reducing the flow loss; if d2 / d1 is less than 1 / 3, the shell is smaller under the same smoke hood, that is, the smoke outlet is far away from the burners on both sides, and the diffusion of negative pressure to both sides is limited, which will weaken the smoke control ability on both sides and easily cause smoke leakage on both sides. If d2 / d1 is greater than 2 / 3, the shell is larger under the same smoke hood, although the negative pressure extends to both sides, the area of the smoke outlet increases, and the effect of the negative pressure gathering to the center is weakened.

[0036] 3) Although the width and depth design of the smoke hood can reduce the defects caused by the thickness of the smoke hood to a certain extent, the smoke collection range is limited due to the small depth of the smoke hood and the relatively small width of the smoke hood relative to the outer shell. Therefore, the smoke collection capacity is still insufficient. For this reason, a smoke collection cavity is designed on the smoke hood to help concentrate the oil smoke and then guide it into the fan system of the outer shell, so that the oil smoke can be sucked into the fan system in a more concentrated state and a shorter path.

[0037] In the above, different proportional relationships are defined in the thickness, width and depth of the smoke hood to produce a synergistic and complementary effect, so that the smoke hood can better cooperate with the fan to achieve more concentrated negative pressure, shorter oil fume path, smaller flow loss, and a light and compact appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Schematic diagram of a range hood according to an embodiment of the present invention (first state);

[0039] Figure 2 This is a schematic diagram of the exploded structure of the range hood according to an embodiment of the present utility model;

[0040] Figure 3 This is a cross-sectional view of the range hood according to an embodiment of the present invention (first state, front-to-back cross-section);

[0041] Figure 4 for Figure 3 A schematic diagram of the partial I enlargement;

[0042] Figure 5 This is a cross-sectional view of the range hood according to an embodiment of the present invention (first state, left-right cross-section);

[0043] Figure 6 A schematic diagram of a smoke collecting hood and a first ventilation component of a range hood according to an embodiment of the present utility model;

[0044] Figure 7 This is a cross-sectional view (left-right cross-sectional view) of the second housing, the movement mechanism, and the second ventilation component of the range hood according to an embodiment of the present utility model;

[0045] Figure 8 for Figure 7 A schematic diagram of the partial II enlargement;

[0046] Figure 9 Schematic diagram of the range hood according to an embodiment of the present invention (second state);

[0047] Figure 10 This is a cross-sectional view of the range hood according to an embodiment of the present invention (second state, front-to-back cross-section);

[0048] Figure 11 and Figure 12 This is a flow field simulation diagram of a range hood according to an embodiment of the present utility model;

[0049] Figures 13 to 18 This is a flow field simulation diagram of the range hood when the size is selected outside the value range of the embodiment of the present utility model. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0051] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0052] See also Figures 1 to 10 A range hood is a top-suction range hood, comprising an outer shell, the outer shell comprising a first shell 11 and a second shell 12, the first shell 11 at least partially covering the outer periphery of the second shell 12, and the first shell 11 is at least partially located below the second shell 12. The second shell 12 can be fixed to an external mounting base, such as a wall, while the first shell 11 can be raised and lowered relative to the second shell 12. The first shell 11 and the second shell 12 are both hollow structures, fluidically connected to each other, and preferably, the horizontal cross-sections can both be rectangular. The first shell 11 and the second shell 12 of the smoking port 62 are both roughly hollow rectangular parallelepipeds, and their width and depth in the height direction are basically the same, and the dimensions of the first shell 11 and the second shell 12 (width and depth) are also close, so as to meet the installation gap and the ability of the first shell 11 to be raised and lowered relative to the second shell 12.

[0053] A smoke hood 6 is provided at the bottom of the first housing 11. The bottom of the smoke hood 6 is raised to form a smoke collection chamber 61. The smoke collection chamber 61 extends into the first housing 11. The smoke hood 6 has a smoke inlet 62 formed at the top of the smoke collection chamber 61. The upwardly raised smoke collection chamber 61 traps smoke, preventing it from escaping when it contacts the smoke hood 6. Furthermore, the upwardly raised smoke collection chamber 61 prevents the bottom of the smoke from being exposed to the smoke collection chamber 6, further enabling the range hood to be concealed.

[0054] The range hood also includes a fan system 2 and a ventilation assembly, wherein the fan system 2 is at least partially disposed within the second housing 12. In this embodiment, the fan system 2 is a centrifugal fan, whose axis X extends forward and backward. In this embodiment, it has a first suction port 21 serving as a primary suction port and a second suction port 22 serving as a secondary suction port, wherein the first suction port 21 is located at the rear side and the second suction port 22 is located at the front side. The ventilation assembly includes a first ventilation component 31 and a second ventilation component 32. The first ventilation component 31 is disposed at the smoke outlet 62, while the second ventilation component 32 is disposed at the bottom of the second housing 12 and is connected to the bottom of the second housing 12 so as to receive oil flowing from the inner wall of the second housing 12 and the fan system 2. The second ventilation component 32 and the second housing 12 can be directly or indirectly connected, and can be connected to the inside of the second housing 12 or to the outside of the second housing 12. To ensure that the second ventilation component 32 can receive the oil flowing down from the inner wall of the second shell 12, when the connection position is located inside the second shell 12, the second ventilation component 32 or the additionally arranged connection member contacts the inner wall of the second shell 12; when the connection position is located outside the second shell 12, the second ventilation component 32 or the additionally arranged connection member at least partially covers the bottom edge of the second shell 12 in the horizontal plane projection. In this embodiment, the front and rear sides of the second ventilation component 32 are connected to the inner side of the second shell 12, while the left and right sides are connected to the lower side of the second shell 12. Figure 4 The connection of the front side of the second ventilation component 32 is located at the rear side of the front side wall of the second shell 12, and the two can be fixed by screws extending forward and backward. Figure 7 and 8 The connection on the right side of the second ventilation component 32 is located below the right side wall of the second shell 12 (a flange can be formed here), and the two can be fixed by screws extending up and down.

[0055] An oil cup 4 is provided at the rear side of the bottom of the first housing 11 to collect oil flowing down from the inner wall of the housing, the ventilation components and the fan system 2 .

[0056] The first ventilation component 31 includes a first ventilation component body 311 and first ventilation holes 312 defined in the first ventilation component body 311. In this embodiment, the first ventilation component body 311 is generally flat, while the first ventilation holes 312 are elongated and extend forward and backward, thereby forming a grid. The second ventilation component 32 includes a second ventilation component body 321 and second ventilation holes 322 defined in the second ventilation component body 321. The second ventilation component body 321 is positioned above the first ventilation component body 311 and below the second housing 12. The second ventilation holes 322 are also elongated and extend forward and backward. To prevent oil dripping, the first ventilation holes 312 and the second ventilation holes 322 are staggered, with the first ventilation hole 312 corresponding to the portion between two adjacent second ventilation holes 322, and the second ventilation hole 322 corresponding to the portion between two adjacent second ventilation holes 322. In this embodiment, both the first ventilation component 31 and the second ventilation component 32 are filters. Alternatively, at least one of the ventilation components may be formed as a plate, and ventilation holes may be provided on the corresponding plate as needed. When the plate is used, the first ventilation hole 311 is provided corresponding to the smoke outlet 62. Furthermore, the first ventilation component 31 and the smoke collection hood 6 forming the smoke collection chamber 61 (described in detail below) may alternatively be an integrated structure.

[0057] The width of the bottom of the shell, that is, the left-right width of the bottom of the first shell 11 is d2, and the width of the smoke hood 6 is d1, and they meet the following conditions: d1>d2. Preferably, if See also Figure 13 and Figure 14 , the shell of the smoke hood 6 is smaller under the same conditions, that is, the smoke outlet 62 is far away from the burners on both sides, and the diffusion of negative pressure to both sides is limited (see Figure 13 The front view of the side will weaken the smoke control ability on both sides and easily cause smoke to escape on both sides. See also Figure 15 and Figure 16 , the shell of the smoke hood 6 is larger under the same conditions, and the negative pressure extends to both sides (see Figure 15 However, the area of the smoking port 62 increases, and the effect of the negative pressure gathering toward the center is weakened. The negative pressure area as a whole is large but has poor gathering effect, low strength, and little downward extension.

[0058] The thickness of the smoke hood 6 is k, which ranges from 0 mm to 50 mm. The smoke collection chamber 61 is formed by a front sidewall 611, a rear sidewall 612, a left sidewall 613, and a right sidewall 614. The front sidewall 611 extends gradually upward from front to rear, the rear sidewall 612 extends gradually downward from the rear end of the front sidewall 611, the left sidewall 613 is located at the left ends of the front and rear sidewalls 611 and 612, and the right sidewall 614 is located at the right ends of the front and rear sidewalls 611 and 612. The aforementioned smoke outlet 62 is located on the rear sidewall 612. The left sidewall 613 and the right sidewall 614 gradually tilt upward toward each other. Alternatively, the smoke outlet 62 may be provided on at least one of the front sidewall 611, the rear sidewall 612, the left sidewall 613, and the right sidewall 614. Each sidewall may be a flat plate or a curved plate.

[0059] In horizontal projection, the front end of the front side wall 611 is located in front of the first housing 11, the left end of the left side wall 613 is located on the left side of the first housing 11, and the right end of the right side wall 614 is located on the right side of the first housing 11. The width of the smoking port 62 in the left-right direction is smaller than the width of the first housing 11 in the left-right direction.

[0060] The depth of the smoke hood 6 in the front-to-back direction is S1, the depth of the bottom of the shell, that is, the bottom of the first shell 11 is S2, and S2 < S1 is satisfied. Preferably, when When, see Figure 17 and Figure 18 When the size of the smoke hood 6 is constant, if the shell size is too small, the extension of the smoke outlet 62 to the front side is too small, that is, the negative pressure on the front side is too small, which will cause smoke to escape from the front side. Figure 11 and Figure 12 , when satisfied When k∈[0mm~50mm] and the smoke collecting chamber 61 partially extends into the shell, the negative pressure area is concentrated in the width range of the shell (from Figure 11 front view) and the depth of the shell (from Figure 12 (Seen from the side view), and due to the arrangement of the smoke collecting chamber 61, the negative pressure zone has a large extension below the smoke collecting hood 6.

[0061] The angle between the front sidewall 611 and the horizontal is β. The depth of the smoke collection chamber 61 in the front-to-back direction is S. The angle between the rear sidewall 612 and the horizontal is γ. To ensure smoke collection in the smoke collection chamber 61, S should be ≥ 280 mm and β should be ≥ 25°. To ensure oil diversion, γ should be ≥ 12°.

[0062] The lifting and lowering of the first shell 11 can meet the needs of collecting smoke when working and hiding it when not working. Moreover, through the above structure, the change of the distance between the first ventilation component 31 and the second ventilation component 32 can be achieved without setting up a separate motion mechanism, which simplifies the structure and reduces costs.

[0063] Therefore, the range hood can be in at least two states, the first state: see Figure 1 and Figure 3 , the first shell 11 rises to its highest position, at which time the first ventilation component 31 and the second ventilation component 32 are in a close state. As a result, the thickness of the smoke hood 6 is relatively small, meeting the requirements of a thin and beautiful appearance, and thereby making the distance between the smoke inlet side of the smoke collecting chamber 61 and the fan system 2 shorter, that is, the path of the oil smoke from contacting the smoke collecting chamber 6 to being sucked into the fan system 2 is shorter, the oil smoke flow loss is small, and a faster flow rate can be maintained to be sucked into the fan system 2; at the same time, the depth and width of the smoke collecting chamber 6 are reasonably set in proportion to the corresponding dimensions of the range hood housing, so that the depth and width of the smoke collecting chamber 6 are close to the housing respectively, so that the oil smoke can be concentrated in the area corresponding to the fan system 2 after passing through the smoke collecting chamber 61, and can be quickly sucked into the fan system without being far away from the fan system 2 in the width direction and depth direction. The smoke converges to the fan system 2, shortening the oil smoke path, thereby improving the oil smoke absorption effect even when the overall volume of the smoke hood 6 is small; the width of the smoke hood 6 is smaller, the smoke collection area is small, and the negative pressure area is concentrated. When the oil smoke is captured by the smoke hood 6, the area is concentrated and the negative pressure is large, further reducing flow losses; the depth of the smoke hood 6 is smaller, which can match most cabinets on the market, thereby meeting the needs of new installation and replacement; in addition, the smoke collection chamber 61 extends into the shell where the fan system 2 is set, and the top of the smoke collection chamber 61 is close to the fan system 2, which reduces the diffusion of oil smoke after flowing out of the smoke collection chamber 61, so that the oil smoke can be sucked into the fan system 2 in a more concentrated state and a shorter path. Second state: The first shell 11 descends relative to the second shell 12, and the distance between the first ventilation component 31 and the second ventilation component 32 gradually increases and separates until the first shell 11 descends to the desired position, which is recorded as the second state (working state), see Figure 9 and Figure 10 At this time, the distance between the two ventilation components is large, which can reduce the wind resistance and increase the wind area. At this time, the smoke hood 6 descends and approaches the smoke source, and the negative pressure area decreases to reduce the escape of oil smoke.

[0064] The "fluid communication" referred to in the present invention refers to the spatial positional relationship between two components or parts (hereinafter collectively referred to as the first part and the second part), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path and / or be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, conduit, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A range hood comprising a housing, a fan system (2) disposed in the housing, and a smoke collecting hood (6) disposed at the bottom of the housing, wherein a smoke collecting cavity (61) is formed on the smoke collecting hood (6), and a smoke outlet (62) is formed on at least one wall surface of the smoke collecting hood (6) constituting the smoke collecting cavity (61); The thickness of the smoke collecting hood (6) is k; it is characterized in that: k satisfies the following relationship: k≤50m.

2. The range hood according to claim 1, characterized in that: The width of the smoke hood (6) in the left-right direction is d1, the width of the bottom of the shell is d2, the depth of the smoke hood (6) in the front-back direction is S1, and the depth of the bottom of the shell is S2. The above parameters satisfy the following relationship: d2<d1, S2≤S1.

3. The range hood according to claim 2, characterized in that: The parameters of the smoke collecting hood (6) and the bottom of the shell also satisfy the following relationship:

4. The range hood according to claim 1, wherein: The smoke collecting hood (6) can be raised and lowered relative to the fan system (2).

5. The range hood according to claim 4, characterized in that: The housing comprises a first shell (11) and a second shell (12); the first shell (11) at least partially covers the outer periphery of the second shell (12) and is at least partially located below the second shell (12); the first shell (11) can move up and down relative to the second shell (12); and the bottom of the housing is the bottom of the first shell (11).

6. The range hood according to claim 5, characterized in that: A first ventilation component (31) is provided at the smoking port (62), and a second ventilation component (32) is provided at the bottom of the second shell (12).

7. The range hood according to claim 1, characterized in that: The smoke collecting chamber (61) partially extends into the housing.

8. The range hood according to claim 1, characterized in that: A first ventilation component (31) is provided at the smoking port (62), and a second ventilation component (32) is provided in the shell. The first ventilation component (31) and the second ventilation component (32) can be raised and lowered relative to each other.

9. The range hood according to claim 8, characterized in that: The housing comprises a first shell (11) and a second shell (12), wherein the first shell (11) at least partially covers the outer periphery of the second shell (12) and is at least partially located below the second shell (12), and the second ventilation component (32) is arranged on the second shell (12). In the oil smoke flow path, the second ventilation component (32) is arranged upstream of the fan system (2), and the first shell (11) can move up and down relative to the second shell (12).

10. The range hood according to claim 9, characterized in that: The second ventilation component (32) is a filter, and the second ventilation component (32) is connected to the bottom of the second shell (12).

11. The range hood according to any one of claims 1 to 10, characterized in that: The smoke collecting hood (6) comprises a front side wall (611), a rear side wall (612), a left side wall (613) and a right side wall (614) which enclose a smoke collecting chamber (61); the front side wall (611) extends gradually upward from the front to the rear, the rear side wall (612) extends gradually downward from the rear end of the front side wall (611) to the rear, the left side wall (613) is located at the left end of the front side wall (611) and the rear side wall (612), the right side wall (614) is located at the right end of the front side wall (611) and the rear side wall (612), and the smoking port (62) is formed on at least one of the front side wall (611), the rear side wall (612), the left side wall (613) and the right side wall (614); The front end of the front side wall (611) is located at the front side of the front bottom of the shell, the left end of the left side wall (613) is located at the left side of the left bottom of the shell, and the right end of the right side wall (614) is located at the right side of the right bottom of the shell.

12. The range hood according to claim 11, characterized in that: The angle between the front side wall (611) and the horizontal direction is β, the depth of the smoke collecting chamber (61) in the front-to-back direction is S, and the following relationship is satisfied: S≥280mm, β≥25°.

13. The range hood according to claim 11, characterized in that: The angle between the rear side wall (612) and the horizontal direction is γ, and satisfies γ≥12°.

14. The range hood according to claim 11, characterized in that: The axis (X) of the fan system (2) extends in the front-to-back direction, and the left side wall (613) and the right side wall (614) extend obliquely toward each other from bottom to top.

Images