Range hood

Abstract

The utility model discloses a range hood which comprises a first shell, a second shell and a fan system, at least part of the fan system is arranged in the second shell, the periphery of the second shell is coated with the first shell, at least part of the first shell is located below the second shell, and the first shell can ascend and descend relative to the second shell. A first ventilation part is arranged at the bottom of the second shell; the first ventilation part comprises a first ventilation part body which is positioned below the second shell; the mounting structure is used for mounting the first ventilation component body to the second shell and is formed by extending upwards at least on the outer side edge of part of the first ventilation component body, and an included angle is formed between the mounting structure and the first ventilation component body; the bottom of the fan system is lower than the bottom of the second shell, and at least part of the fan system is arranged in the space defined by the first ventilation component.

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 one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. They suck and exhaust oil fumes through a fan system installed inside the range hood and use a filter screen to filter out some grease particles. The fan system is usually a centrifugal fan, including a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, a negative pressure suction is generated at the center of the fan, sucking the oil fumes below the range hood into the fan. After being accelerated by the fan, the oil fumes are collected by the volute and guided out of the room.

[0003] For traditional top - mounted range hoods, the smoke collecting hood has a large size. The excessive front - to - back size makes it unable to meet the requirements of the cabinet, and users are prone to hitting their heads during use. Moreover, the excessive thickness makes the range hood bulky and occupies too much space in the cooking area.

[0004] Therefore, the applicant has designed a lifting and thin - type range hood, such as a lifting range hood with application numbers 202321372669.4 and 202321376010.6, which includes a fan frame and an outer box body. The bottom of the outer box body is provided with a smoke inlet, and a lower plate body is installed at the smoke inlet. The lower plate body is provided with lower air inlet holes. The bottom of the fan frame is fixed with an upper plate body, and the upper plate body is provided with upper air inlet holes.

[0005] For this existing lifting range hood, due to the limitations of the installation positions of the fan frame and the upper plate body, the installation position of the fan system is relatively high. The outer box body descends to make the smoke suction port close to the smoke source to improve the oil fume suction effect. However, the relatively high position of the fan system results in a relatively long distance between the negative pressure center and the smoke suction port, and the negative pressure at the smoke suction port is weak, so the oil fume suction effect has not been significantly improved. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a range hood that can reduce the installation position of the fan system, move the negative pressure area downward, and thus help improve the negative pressure intensity at the smoke suction port in view of the deficiencies of the above - mentioned existing technologies.

[0007] The technical solution adopted by the utility model to solve the above - mentioned technical problems is as follows: A range hood includes a first housing, a second housing, and a fan system at least partially disposed in the second housing. The first housing covers the outer periphery of the second housing and at least partially lies below the second housing. The first housing can be lifted and lowered relative to the second housing. The bottom of the second housing is provided with a first ventilation component; characterized in that:

[0008] The first ventilation component includes:

[0009] A first ventilation component body, located below the second housing; and

[0010] An installation structure for installing the first ventilation component body to the second housing, formed by at least partially extending upward along the outer edge of the first ventilation component body, and an included angle is formed between the installation structure and the first ventilation component body;

[0011] The bottom of the fan system is lower than the bottom of the second housing, and at least part of the fan system is placed in the space surrounded by the first ventilation component.

[0012] By providing an installation structure that extends upward from the outer edge of the first ventilation component body of the first ventilation component and is installed on the bottom of the second housing, there is a clear demarcation line between the first ventilation component body and the installation structure, so that the shape and structure of the installation structure are not restricted by the first ventilation component body. Thus, the first ventilation component body can be entirely located below the second housing, and the overall shape, structure, and size of the first ventilation component have greater flexibility. As a result, the space with an open upper end formed by the first ventilation component as a whole can be adjusted according to the size and layout of the fan system, so that the fan system is placed below, partially extending downward below the second housing and into the space formed by the first ventilation component. The negative pressure center moves downward, thereby reducing the distance from the smoking port, strengthening the negative pressure intensity at the smoking port, promoting the inhalation of oil fumes, and improving the oil fume extraction effect; at the same time, the oil guiding direction of the first ventilation component body can also be determined as needed and is no longer restricted by the overall shape of the first ventilation component.

[0013] Preferably, for facilitating the stable installation of the first ventilation component to the second housing, the installation structure includes a first installation portion and / or a second installation portion, and at least one of the installation portions has two arranged on opposite sides of the first ventilation component body.

[0014] Preferably, for further facilitating the stable installation of the first ventilation component to the second housing, one of the first installation portion and the second installation portion has two and is located on both sides of the axis of the fan system, and the other of the first installation portion and the second installation portion has two and is arranged at intervals along the axis of the fan system.

[0015] Preferably, the first installation portion has two. The two first installation portions extend vertically upward from the outer edge of the first ventilation component body, the two first installation portions are curved and protrude in directions away from each other, or the two first installation portions extend obliquely downward from top to bottom in directions approaching each other. The shape of the first installation portion is determined for ease of installation and molding.

[0016] Further, the axis of the fan system extends in the front-rear direction. The mounting structure at least includes a second mounting portion disposed on the front side of the first ventilation component body. The second mounting portion located on the front side of the first ventilation component body is gradually inclined forward from bottom to top. Thus, the second mounting portion can also play a role in guiding the oil fume to flow towards the fan system, further promoting the suction of the oil fume.

[0017] Further, a first ventilation hole is formed in the first ventilation component body, and a second ventilation hole is formed in the second mounting portion located on the front side of the first ventilation component body. Thereby, the air inlet area of the oil fume can be increased, and the oil fume suction effect can be improved.

[0018] Further, the first ventilation component body is gradually inclined downward from front to back, and an oil cup is provided at the bottom of the rear side of the first housing. Thereby, the oil liquid on the first ventilation component can be collected into the oil cup.

[0019] Further, the fan system includes a volute. An oil dripping nozzle is provided at the lowest position of the volute; the part of the first ventilation component corresponding to the position of the oil dripping nozzle of the first ventilation component body is in a closed state. The vertical distance between the oil dripping nozzle and the first ventilation component body is c, and c≥8mm is satisfied. Since the pressure inside the volute is positive, therefore, a high-speed air flow will spray outwards from the inside of the volute at the oil dripping nozzle at the bottom of the volute. In this case, if the distance between the first ventilation component and the oil leakage hole is too close, it will cause the oil liquid to splash laterally after dripping onto the first ventilation component. Since there are openings on the first ventilation component and the splashing oil cannot be blocked laterally, the first ventilation component will not be able to play the role of receiving the oil dripping from the fan. Therefore, the distance between the first ventilation component and the oil dripping nozzle is made to meet certain requirements to reduce the splashing of the oil liquid after dripping onto the first ventilation component, so as to better receive the oil dripping from the fan.

[0020] Preferably, the width of the oil dripping nozzle is d1, and the minimum closed area of the part of the first ventilation component body of the first ventilation component corresponding to the position of the oil dripping nozzle is π(d1 / 2 + ctanγ) 2 , where γ is the angle between the connection line between any point on the edge of the oil dripping nozzle and any point on the first ventilation component body and the vertical direction, and γ≥30° is satisfied.

[0021] To avoid the oil liquid from splashing from the front side, the axis of the fan system extends in the front-rear direction. The mounting structure at least includes a second mounting portion disposed on the front side of the first ventilation component body. The second mounting portion located on the front side of the first ventilation component body has a closed portion at the position corresponding to the front side of the oil dripping nozzle.

[0022] To further avoid the oil liquid from splashing from the front side, the upper end of the closed portion of the second mounting portion is not lower than the lower end of the oil dripping nozzle.

[0023] Compared with the prior art, the advantages of the present utility model are as follows: By providing an installation structure that is installed on the bottom of the second housing by extending upward from the outer edge of the first ventilation component body of the first ventilation component, there is a clear demarcation line between the first ventilation component body and the installation structure, such that the shape and structure of the installation structure are not restricted by the first ventilation component body. As a result, the entire first ventilation component body can be located below the second housing, and the overall shape, structure, and size of the first ventilation component have greater flexibility. Thus, the space with an open upper end formed by the entire first ventilation component can be adjusted according to the size and layout of the fan system, so that the fan system is placed below, partially extending downward below the second housing and into the space formed by the first ventilation component. The negative pressure center moves downward, thereby reducing the distance from the smoking port, strengthening the negative pressure intensity at the smoking port, promoting the inhalation of oil fumes, and improving the oil fume extraction effect. At the same time, the oil guiding direction of the first ventilation component body can also be determined according to needs, and is no longer restricted by the overall shape of the first ventilation component. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the range hood according to the first embodiment of the present utility model (first state);

[0025] Figure 2 Exploded structural schematic diagram of the range hood according to the first embodiment of the present utility model;

[0026] Figure 3 Cross-sectional view of the range hood according to the first embodiment of the present utility model (first state, front-to-back cross-section);

[0027] Figure 4 For Figure 3 Partial enlarged schematic diagram of I;

[0028] Figure 5 Schematic diagram of the first ventilation component of the range hood according to the first embodiment of the present utility model;

[0029] Figure 6 Schematic diagram of the range hood according to the first embodiment of the present utility model with parts of the second housing, the first housing, the second ventilation component, and the oil cup hidden;

[0030] Figure 7 Cross-sectional view of the second housing, the motion mechanism, and the second ventilation component of the range hood according to the embodiment of the present utility model (left-to-right cross-section);

[0031] Figure 8 For Figure 7 Partial enlarged schematic diagram of II;

[0032] Figure 9 Schematic diagram of the range hood according to the first embodiment of the present utility model (second state);

[0033] Figure 10 Cross-sectional view (second state, front-to-back cross-section) of the range hood according to the first embodiment of the present utility model;

[0034] Figure 11 is Figure 10 Partial enlarged schematic view of III;

[0035] Figure 12 Schematic view of the range hood according to the second embodiment of the present utility model, with a part of the second housing, the first housing, the second ventilation component, and the oil cup hidden;

[0036] Figure 13 Schematic view of the first ventilation component of the range hood according to the second embodiment of the present utility model;

[0037] Figure 14 Schematic view of the range hood according to the third embodiment of the present utility model, with a part of the second housing, the first housing, the second ventilation component, and the oil cup hidden;

[0038] Figure 15 Schematic view of the first ventilation component of the range hood according to the third embodiment of the present utility model;

[0039] Figure 16 Cross-sectional view (front-to-back cross-section) of the range hood according to the fourth embodiment of the present utility model, with the first housing, the second ventilation component, and the oil cup hidden. Detailed Description of the Embodiments

[0040] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0041] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the disclosed embodiments of the present utility model can be arranged in different directions, these terms indicating directions should only be regarded as illustrative and not as limiting. For example, "upper" and "lower" are not necessarily limited to the directions opposite to or consistent with the direction of gravity. In addition, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0042] Embodiment 1

[0043] Refer to Figures 1 - 8 , an oil fume extractor, which is a top suction type oil fume extractor, including a housing. The housing includes a first housing 11 and a second housing 12. The first housing 11 at least partially covers the outer periphery of the second housing 12, and the first housing 11 is at least partially located below the second housing 12. The second housing 12 can be fixed to an external installation base, such as a wall, while the first housing 11 can move up and down relative to the second housing 12. Both the first housing 11 and the second housing 12 are hollow structures, fluidly connected to each other, and preferably their horizontal cross-sections can be rectangular.

[0044] The housing further includes a smoke collecting hood 6 provided at the bottom of the first housing 11. A smoke collecting cavity 61 that bulges upward from the bottom surface is formed in the smoke collecting hood 6. A smoke suction port 62 is formed at the top of the smoke collecting hood 6 where the smoke collecting cavity 61 is located. By forming the upwardly bulging smoke collecting cavity 61, the function of collecting smoke can be achieved, preventing oil fume from escaping when contacting the smoke collecting hood 6. Moreover, since it bulges upward and does not expose at the bottom of the smoke collecting hood 6, the concealment of the lifting smoke machine can be better realized.

[0045] The oil fume extractor further includes a fan system 2 and a ventilation component. Among them, the fan system 2 is at least partially arranged in the second housing 12. In this embodiment, the fan system 2 is a centrifugal fan. The ventilation component includes a first ventilation part 31 and a second ventilation part 32. The second ventilation part 32 is arranged at the smoke suction port 62, while the first ventilation part 31 is arranged at the bottom of the second housing 12 and is connected to the bottom of the second housing 12, so as to receive the oil flowing down from the inner side wall surface of the second housing 12 and the fan system 2. The first ventilation part 31 and the second housing 12 can be directly connected or indirectly connected, and can be connected inside the second housing 12 or outside the second housing 12. To ensure that the first ventilation part 31 can receive the oil flowing down from the inner side wall surface of the second housing 12, when the connection position is inside the second housing 12, the first ventilation part 31 or an additional connecting piece contacts the inner side wall surface of the second housing 12; when the connection position is outside the second housing 12, in the horizontal projection, the first ventilation part 31 or an additional connecting piece at least partially covers the bottom edge of the second housing 12. In this embodiment, the front and rear sides of the first ventilation part 31 are connected to the inside of the second housing 12, while the left and right sides are connected to the lower side of the second housing 12. Refer to Figure 4 , the connection part on the front side of the first ventilation part 31 is located at the rear side of the front side wall surface of the second housing 12, and the two can be fixed by screws extending in the front and rear directions. Refer to again Figure 7 And 8 , the connection part on the right side of the first ventilation part 31 is located below the right side wall surface of the second housing 12 (flanges can be formed here respectively), and the two can be fixed by screws extending in the up and down directions.

[0046] The first ventilation component 31 includes a first ventilation component body 311 and a first ventilation hole 312 formed in the first ventilation component body 311. The second ventilation component 32 includes a second ventilation component body 321 and a third ventilation hole 322 formed in the second ventilation component body 321. The second ventilation component body 321 is substantially flat and slopes downward gradually from front to back. The first ventilation component body 311 is correspondingly located above the second ventilation component body 321 and below the second housing 12. Both the first ventilation hole 312 and the third ventilation hole 322 are elongated ventilation holes and extend in the front-back direction. To avoid oil dripping, the first ventilation hole 312 and the third ventilation hole 322 are arranged staggeredly, that is, the first ventilation hole 312 corresponds to the solid part between two adjacent third ventilation holes 322, and the third ventilation hole 322 corresponds to the solid part between two adjacent first ventilation holes 312.

[0047] The length extension directions of the first ventilation hole 312 and the first ventilation hole 312 are the same. In the projection on the horizontal plane, the included angle between the length direction of the first ventilation hole 312 and the axis X of the fan system 2 is ≤ 45°. Since both the second ventilation component 32 and the first ventilation component 31 are grilles, the grille directions of the two layers of filter meshes are kept basically the same, and the grille direction of the first ventilation component 31 can also be the same as the air inlet direction of the fan system 2 or have a small included angle with the air inlet direction of the fan system 2. Thus, the air flow can rise upward along a relatively stable path, reducing the large air inlet resistance caused by path change, playing a role in air flow combing, and also reducing noise. The first ventilation component 31 and the second ventilation component 32 are both filter meshes in this embodiment. Alternatively, they can also be formed by opening holes in plate members.

[0048] The lifting of the first housing 11 can meet the requirements of gathering smoke during work and hiding when not working. Moreover, through the above structure, the change in the distance between the second ventilation component 32 and the first ventilation component 31 can be achieved without separately setting a motion mechanism, simplifying the structure and reducing the cost.

[0049] Thus, the range hood can be at least in a first state where the first housing 11 rises to the highest position, that is, the non-working state, as shown in Figure 1 and Figure 3 , and can be in a second state where the first housing 11 descends a certain height relative to the second housing 12, that is, the working state, as shown in Figure 9 and Figure 10 . The descending height can be fixed or adjustable according to the amount of oil fume as needed.

[0050] At the bottom of the rear side of the first housing 11, an oil cup 4 is provided. The second ventilation component 32 and the first ventilation component body 311 of the first ventilation component 31 both extend gradually downward from the front to the back, so as to guide the accumulated oil stains into the oil cup 4. On the oil fume flow path, the fan system 2 is located downstream of the first ventilation component 31. The axis X of the fan system 2 extends back and forth, and includes a first suction port 21 as the main suction port and a second suction port 22 as the auxiliary suction port. The first suction port 21 faces backward, which can reduce the aerodynamic noise of the fan system 2 away from the human ear. After the oil fume enters from the second ventilation component 32, it can rise through the first ventilation holes 312 on the first ventilation component body 311 of the first ventilation component 31 and be sucked by the fan system 2.

[0051] The first ventilation component 31 further includes a mounting structure for mounting the first ventilation component body 311 to the second housing 12, which is formed by extending upward from the outer edge of the first ventilation component body 311. The mounting structure preferably may include a first mounting portion 313 and / or a second mounting portion 314, and at least one of the mounting portions is composed of two components. In this embodiment, each mounting portion includes two components. The first mounting portion 313 has two and extends upward on the opposite sides of the first ventilation component body 311. The second mounting portion 314 also has two and extends upward on the opposite sides of the first ventilation component body 311. The two adjacent sides of the first mounting portion 313 are both the second mounting portion 314, and the two adjacent sides of the second mounting portion 314 are both the first mounting portion 313. In this embodiment, the first mounting portion 313 and the second mounting portion 314 are provided simultaneously. Among them, the first mounting portion 313 is located on both sides of the axis X of the fan system 2, that is, the left and right sides as shown in Figure 6 i.e., extending upward from the left and right ends of the first ventilation component body 311. The second mounting portion 314 is arranged at intervals along the axis X of the fan system 2, that is, the front and back sides as shown in Figure 6 i.e., extending upward from the front and back ends of the first ventilation component body 311. The first ventilation component body 311 and the first mounting portion 313 can be integrally formed or made into a whole by welding or other means. The first ventilation component body 311 and the second mounting portion 314 can be integrally formed or made into a whole by welding or other means.

[0052] By providing the first mounting portion 313 and / or the second mounting portion 314, the first ventilation component body 311 can be mounted to the second housing 12, and thereby the first ventilation component body 311 is located below the second housing 12. An included angle is formed between the first ventilation component body 311 and the first mounting portion 313, and between the first ventilation component body 311 and the second mounting portion 314. That is to say, there is a demarcation line (the bending portion of each mounting portion and the first ventilation component body 311) between the first ventilation component body 311 and the first mounting portion 313, and between the first ventilation component body 311 and the second mounting portion 314, such that the shapes and structures of the first mounting portion 313 and the second mounting portion 314 are not restricted by the first ventilation component body 311. The upper ends of the first mounting portions 313 are respectively fixed to the lower ends of the left and right side walls of the second housing 12, and the upper ends of the second mounting portions 314 are respectively fixed to the lower ends of the front and rear side walls of the second housing 12.

[0053] Thereby, the blower system 2 can be disposed below the second housing 12, that is, the bottom of the blower system 2 is lower than the bottom of the second housing 12, and a part of the blower system 2 is disposed in the space surrounded by the first ventilation component 31. When the range hood is operating, the downward disposition of the blower system 2 can reduce the distance between the negative pressure center and the smoke suction port 62 relative to the prior art, thereby strengthening the negative pressure at the smoke suction port 62, and further promoting the suction of oil fumes and improving the oil fume suction effect. In this embodiment, the first mounting portion 311 extends vertically, and the distance between the two first mounting portions 313 is equivalent to the distance between the left and right side walls of the second housing 12, and this distance is greater than the width dimension of the blower system 2 in the left-right direction. The distance between the two second mounting portions 314 is equivalent to the distance between the front and rear side walls of the second housing 12. Since this front-rear distance is much greater than the thickness of the blower system 2 along the axis X, therefore, the second mounting portion 314 is allowed to have a certain inclination, that is, as Figure 3 and Figure 5 shown, the second mounting portion 314 at the front side gradually inclines downward from top to bottom. A second ventilation hole 315 can be formed in the second mounting portion 314 at the front side, so that oil fumes can pass through the second ventilation hole 315 and be sucked into the second suction port 22. At the same time, the oil fumes can also be sucked into the second suction port 22 upward and forward along the second mounting portion 314 at the front side, such that the second mounting portion 314 functions as a flow guide and increases the air intake volume.

[0054] The fan system 2 includes a volute 23, on which the first suction port 21 and the second suction port 22 are formed, and a drip nozzle 24 is provided at the lowest position of the volute 23. The first ventilation component body 311 of the first ventilation component 31 has a first end 3111 and a second end 3112 that are opposite in the front-to-back direction. In this embodiment, since the fan system 2 is rear-intake, the first end 3111 is the rear end, and the second end 3112 is the front end. In horizontal plane projection, the first suction port 21 is located between the drip nozzle 24 and the first end 3111.

[0055] See also Figure 10 and Figure 11 Since there is a positive pressure inside the volute 23, a high-speed airflow will be ejected from the volute 23 to the outside at the oil drip nozzle 24 at the bottom of the volute 23. In this case, if the first ventilation component 31 and the oil drip nozzle 24 are too close, the oil will splash laterally after dripping onto the first ventilation component 31. Since there are openings on the first ventilation component 31 and the splashing oil cannot be blocked laterally, the first ventilation component 31 will not be able to receive the oil dripped from the fan system 2. For this reason, the first ventilation component body 311 of the first ventilation component 31 and the part corresponding to the position of the oil drip nozzle 24 are closed, and the vertical distance between the oil drip nozzle 24 and the first ventilation component body 311 of the first ventilation component 31 is c, and c≥8mm. The spacing between the first mounting parts 313 and the spacing between the second mounting parts 314 must be sufficient to allow the fan system 2 to be arranged in the above-mentioned range.

[0056] The width of the drip nozzle 24 is d1 (the dimension in the front-to-back direction), and the minimum closed area of ​​the portion of the first ventilation component body 311 of the first ventilation component 31 corresponding to the position of the drip nozzle 24 is π(d1 / 2+ctanγ) 2 , γ is the angle between the line between any point on the edge of the oil drip nozzle 24 and any point on the first ventilation component body 311 and the vertical direction, and satisfies γ≥30°, where it is assumed that the oil drip nozzle 24 is circular.

[0057] In addition, some oil may splash forward after dripping onto the first ventilation component body 311. For this reason, the front second mounting portion 314 and the position corresponding to the front side of the oil drip nozzle 24 also have a closing portion 3141, and the upper end of the closing portion 3141 is not lower than the lower end of the oil drip nozzle 24.

[0058] Embodiment 2

[0059] See also Figure 12 and Figure 13, in this embodiment, the difference from the above-mentioned first embodiment is that the first mounting portion 313 is curved and convex in a direction away from each other. In this embodiment, the second mounting portion 314 is not provided, but the second mounting portion 314 can be provided as needed.

[0060] Embodiment Three

[0061] See Figure 14 and Figure 15 , in this embodiment, the difference from the above-mentioned second embodiment is that the first mounting portion 313 extends obliquely downward in a direction approaching each other. The inclination angle can be determined as needed, as long as it is ensured that the fan system 2 can be placed below into the space enclosed by the first ventilation component 31. For example, when the fan system 2 is placed below to the bottom of the first ventilation component 31, it is ensured that the minimum distance between the first mounting portions 313 is not less than the width of the fan system 2 (the dimension in the left-right direction).

[0062] In the second embodiment and this embodiment, if the second mounting portion 314 is provided, it can also adopt the same shape as the first mounting portion 313.

[0063] Embodiment Four

[0064] See Figure 16 , in this embodiment, the difference from the above-mentioned third embodiment is that the axis X of the fan system 2 extends left and right. At this time, a relatively larger inclination angle of the first mounting portion 313 than that in the third embodiment can be allowed.

[0065] What is referred to as "fluid communication" in the present utility model refers to the spatial position relationship between two components or parts (hereinafter uniformly referred to as the first part and the second part respectively), that is, fluid (gas, liquid or a mixture of both) can flow along the flow path from the first part and / or be transported to the second part. It can be that the first part and the second part are directly connected, or the first part and the second part are indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, a passage, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing fluid to flow through or a combination of the above.

Claims

1. A range hood, comprising a first shell (11), a second shell (12), and a fan system (2) at least partially arranged in the second shell (12), wherein the first shell (11) 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 be raised and lowered relative to the second shell (12), and a first ventilation component (31) is arranged at the bottom of the second shell (12); characterized in that: The first ventilation component (31) comprises: A first ventilation component body (311) is located below the second shell (12); and A mounting structure, used for mounting the first ventilation component body (311) on the second housing (12), and formed by extending upward from at least a portion of the outer edge of the first ventilation component body (311), with an angle formed between the mounting structure and the first ventilation component body (311); The bottom of the fan system (2) is lower than the bottom of the second housing (12), and the fan system (2) is at least partially placed in the space surrounded by the first ventilation component (31).

2. The range hood according to claim 1, characterized in that: The mounting structure comprises a first mounting portion (313) and / or a second mounting portion (314), at least one of the mounting portions having two portions arranged on opposite sides of the first ventilation component body (311).

3. The range hood according to claim 2, characterized in that: One of the first mounting portion (313) and the second mounting portion (314) has two mounting portions and is located on both sides of the axis (X) of the fan system (2), and the other of the first mounting portion (313) and the second mounting portion (314) has two mounting portions and is arranged at intervals along the axis (X) of the fan system (2).

4. The range hood according to claim 3, characterized in that: The first mounting parts (313) have two parts, the two first mounting parts (313) extend vertically upward from the outer edge of the first ventilation component body (311), the two first mounting parts (313) are curved and convex in a direction away from each other, or the two first mounting parts (313) extend obliquely from top to bottom in a direction approaching each other.

5. The range hood according to claim 2, characterized in that: The axis (X) of the fan system (2) extends in the front-to-back direction, and the mounting structure comprises at least a second mounting portion (314) arranged on the front side of the first ventilation component body (311), and the second mounting portion (314) located on the front side of the first ventilation component body (311) gradually tilts forward from bottom to top.

6. The range hood according to claim 5, characterized in that: The first ventilation component body (311) is provided with a first ventilation hole (312), and the second mounting portion (314) located on the front side of the first ventilation component body (311) is provided with a second ventilation hole (315).

7. The range hood according to any one of claims 1 to 5, characterized in that: The first ventilation component body (311) gradually tilts downward from front to back, and an oil cup (4) is provided at the rear bottom of the first shell (11).

8. The range hood according to any one of claims 1 to 5, characterized in that: The fan system (2) comprises a volute (23), and an oil drip nozzle (24) is arranged at the lowest position of the volute (23); the first ventilation component body (311) of the first ventilation component (31) and the part corresponding to the position of the oil drip nozzle (24) are in a closed state, and the vertical distance between the oil drip nozzle (24) and the first ventilation component body (311) is c, and c≥8mm is satisfied.

9. The range hood according to claim 8, characterized in that: The width of the oil drip nozzle (24) is d1, and the minimum closed area of ​​the first ventilation component body (311) of the first ventilation component (31) and the corresponding portion of the oil drip nozzle (24) is π(d1 / 2+ctanγ) 2 , γ is the angle between a line connecting any point on the edge of the oil drip nozzle (24) and any point on the first ventilation component body (311) and the vertical direction, and satisfies γ≥30°.

10. The range hood according to claim 8, characterized in that: The axis (X) of the fan system (2) extends in the front-to-back direction, and the mounting structure at least includes a second mounting portion (314) arranged on the front side of the first ventilation component body (311), and the second mounting portion (314) located on the front side of the first ventilation component body (311) has a closing portion (3141) at a position corresponding to the front side of the oil drip nozzle (24).

11. The range hood according to claim 10, characterized in that: The upper end of the closing portion (3141) of the second mounting portion (314) is not lower than the lower end of the oil drip nozzle (24).

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