A range hood

Abstract

The application discloses an oil fume extractor, which comprises an air inlet assembly and an upper box body, the bottom surface of the upper box body is provided with an air inlet, the air inlet assembly comprises a lower box body and a smoke baffle, the lower box body comprises a back plate connected with the rear side of the upper box body; the air inlet assembly further comprises a first baffle, the first baffle is fixedly arranged at the upper end of the smoke baffle, and the smoke baffle and the first baffle have at least a closed state and an open state; in the closed state, the smoke baffle is close to the back plate, and the first baffle closes the air inlet; in the open state, the first baffle opens the air inlet, and a smoke collecting cavity is formed between the smoke baffle and the back plate. Compared with the prior art, the oil fume extractor has the advantages that: on the premise of ensuring the structural strength, the air inlet channel in the form of a fixed inner cavity is not needed, the oil fume extractor can be made extremely light and thin, the smoke baffle and the first baffle are kept in a fixed state, there is no mutual movement between the sub-components, the related parameter requirements (such as assembly gap) are easy to control, and the overall structure is stable and reliable.

Description

Technical Field

[0001] This invention relates to an oil fume purification device, and more particularly to an oil fume extractor. Background Technology

[0002] Range hoods have become an indispensable kitchen appliance in modern homes. They operate on the principles of fluid dynamics, using a centrifugal fan inside to draw in cooking fumes and a filter to remove some grease particles. The centrifugal fan consists of a casing, an impeller housed within the casing, and a motor that drives the impeller. As the impeller rotates, a negative pressure is generated at the center of the fan, drawing in the cooking fumes from below. After being accelerated by the fan, the fumes are collected by the casing and guided outdoors.

[0003] Due to limited kitchen space, a thin range hood has been developed to improve space utilization. For example, Chinese Patent Application No. 201420538159.4 discloses a novel ultra-thin range hood with a fan box and a fume extraction chamber. The fume extraction chamber is located directly below and connected to the fan box, and is flush against the wall. The front panel of the fume extraction chamber gradually slopes towards the wall from top to bottom. Another example is Patent Application No. 2018207758. Chinese Patent No. 51.7 discloses an ultra-thin bottom-suction range hood, including a blower box and a smoke collection hood. The smoke collection hood is located directly below the blower box and is connected to the blower box. The blower box is a three-dimensional columnar cabinet shape, and the smoke collection hood is a rectangular flat plate with a hollow interior, the width of which is greater than its height. The lower side of the smoke collection hood has a hidden air inlet along its long edge. The smoke collection hood is equipped with a smoke guide plate, which is located directly above the hidden air inlet. The smoke guide plate forms an angle of 45°-60° with the front wall of the smoke collection hood cavity.

[0004] As can be seen from the above, existing thin range hoods, whether they are designed to draw air from the front to form a near-suction type or from the bottom to form a low-suction type, must retain an air intake channel against the wall. In order to ensure the smoke extraction effect, the air intake channel should not be too small, resulting in the exposed part of the range hood still having a large thickness. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to address the shortcomings of the prior art by providing a range hood that reduces the space occupied by the exposed parts of the range hood and improves space utilization while ensuring the smoke extraction effect.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a range hood, comprising an air inlet assembly and an upper housing, wherein an air inlet is provided on the bottom surface of the upper housing, the air inlet assembly comprises a lower housing and a smoke baffle, and the lower housing comprises a back plate connected to the rear side of the upper housing; characterized in that:

[0007] The air intake assembly further includes a first baffle, which is fixedly disposed at the upper end of the smoke baffle. The smoke baffle and the first baffle have at least a closed state and an open state.

[0008] In the closed state, the smoke baffle is close to the back panel, and the first baffle closes the air inlet;

[0009] When in the open state, the first baffle opens the air inlet, and a smoke-collecting cavity is formed between the smoke baffle and the back plate.

[0010] By rotating the baffle, the air inlet can be closed when the machine is off and opened when it is working. At the same time, when the baffle is flipped up, it can be pushed forward to form a smoke-gathering cavity with the back panel, expanding the smoke-gathering area and ensuring good smoke extraction effect. When closed, the baffle moves backward until it is close to the back panel (wall). Under the premise of ensuring structural strength, there is no need to form a fixed internal cavity air inlet channel, which can achieve an extremely thin and light design, reducing the space occupied by the exposed parts of the range hood and improving space utilization. Moreover, the baffle and the first baffle remain in a fixed state, and there is no mutual movement between sub-components, making it easy to control relevant parameter requirements (such as assembly gaps), and the overall structure is stable and reliable.

[0011] Furthermore, in the open state, the assembly consisting of the first baffle and the smoke baffle abuts against the front edge of the air inlet. This prevents pressure leakage caused by a gap between the front edge of the air inlet and the first baffle (smoke baffle).

[0012] Preferably, in the open state, the air inlet is located at the top of the smoke collection chamber, and the smoke collection chamber is in fluid communication with the upper box body through the air inlet.

[0013] To facilitate the fixing of the smoke baffle and the first baffle, the air inlet assembly also includes a panel bracket, which fixes the first baffle and the smoke baffle together.

[0014] To facilitate the movement of the smoke baffle and the first baffle, the range hood also includes a motion mechanism for driving the panel support. The motion mechanism includes a drive mechanism and a connecting rod. One end of the connecting rod is rotatably connected to the upper housing, and the other end of the connecting rod is fixed to the rear side of the panel support. The drive mechanism is used to drive the connecting rod to rotate around the left-right extending axis.

[0015] To avoid interference between the connecting rod and the first baffle, the connecting rod is curved and protrudes backward.

[0016] Preferably, the smoke baffle and the first baffle are formed at a right angle or an obtuse angle, and the shape of the panel bracket is adapted to the overall shape formed by the smoke baffle and the first baffle.

[0017] To facilitate the formation of a vortex by the angle between the smoke baffle and the first baffle when the airflow impacts the transition point, the smoke baffle and the first baffle are rounded.

[0018] To prevent oil fumes from escaping from the left and right sides of the upper chamber, the lower chamber also includes a top plate and a bottom plate. The top plate is formed by extending forward from the top of the back plate. The width of the back plate is greater than the width of the upper chamber. The top plate is located on the left and right sides of the upper chamber. The front end of the bottom plate is connected to the front end of the top plate, and the rear end of the bottom plate extends to the front side of the back plate.

[0019] Furthermore, the air intake assembly also includes a second baffle, which is disposed on the front side of the back plate. When closed, the smoke baffle is located above the second baffle. Thus, when open, the second baffle can guide the fumes, allowing them to enter the smoke collection chamber more quickly.

[0020] Compared with the prior art, the advantages of this invention are as follows: by rotating the baffle, the air inlet can be closed in the off state and opened in the working state. At the same time, the smoke baffle can be pushed forward when flipped up to form a smoke-gathering cavity with the back plate, expanding the smoke-gathering area and ensuring good smoke extraction effect. When closed, the smoke baffle moves backward until it is close to the back plate (wall). Under the premise of ensuring structural strength, there is no need to form a fixed internal cavity air inlet channel, which can achieve an extremely thin and light design, reduce the space occupied by the exposed part of the range hood, and improve space utilization. Moreover, the smoke baffle and the first baffle remain in a fixed state, and there is no mutual movement between sub-components, making it easy to control relevant parameter requirements (such as assembly gaps), and the overall structure is stable and reliable. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the closed state of the range hood according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional view of the range hood in the closed state according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram (closed state) of the baffle assembly and its movement mechanism of the range hood according to an embodiment of the present invention;

[0024] Figure 4 This is an exploded structural diagram of the baffle assembly of the range hood according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the lower casing of a range hood according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the range hood in the open state according to an embodiment of the present invention;

[0027] Figure 7This is a cross-sectional view of the range hood in the open state according to an embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the profile of the smoke baffle and the first baffle in one embodiment of the range hood of the present invention;

[0029] Figure 9 This is a schematic diagram of the profile of a smoke baffle and a first baffle in an alternative embodiment of the range hood of the present invention;

[0030] Figure 10 This is a schematic diagram of the profile of a smoke baffle and a first baffle in an alternative embodiment of the range hood of the present invention;

[0031] Figure 11 This is a schematic diagram of the profile of a smoke baffle and a first baffle in an alternative embodiment of the range hood of the present invention. Detailed Implementation

[0032] 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 denote the same or similar elements or elements having the same or similar functions.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0034] See Figures 1 to 7 A range hood includes an air intake assembly 1 and an upper housing 2, wherein a fan system 3 is housed within the upper housing 2. The bottom surface of the upper housing 2 can be flush with or tilted relative to the kitchen cabinets. In the installed state, the upper housing 2 is concealed within the kitchen cabinets, with only the air intake assembly 1 exposed below the cabinets. Alternatively, the fan system 3 can be housed in another housing connected to the upper housing 2.

[0035] The air intake assembly 1 includes a lower housing 11, a smoke baffle 12, a first baffle 13, and a second baffle 14. An air inlet 21 is provided on the bottom surface of the upper housing 2 near the rear end, extending in the left-right direction. The fan system 3 is located near the front of the upper housing 2. A filter 5 is provided inside the upper housing 2, located above the air inlet 21 and extending forward beyond it. The filter 5 gradually slopes downward from front to back. The filter 5 is closed at the position corresponding to the fan system 3 without any mesh openings. The structure and arrangement of the filter 5 can prevent oil droplets from flying out during operation, and at the same time guide the condensed oil in the fan system 3 to the rear side, and collect it in an oil cup (not shown) located at the bottom of the lower housing 11.

[0036] The lower housing 11 includes a back panel 111, side panels 112, and a top panel 113. The back panel 111 is connected to the rear side of the upper housing 2 and can be independent of or integral with the upper housing 2. The top panel 113 is formed by extending forward from the top of the back panel 111. The back panel 111, side panels 112, and top panel 113 can be independent panels or integral panels. The top panel 113 can be gradually inclined downward from front to back. Usually, in order to achieve a larger air intake area and facilitate the installation of the upper housing 2 in the kitchen wall cabinet (to minimize the volume), the width d1 (the dimension in the left-right direction) of the back panel 111 is greater than the width d2 of the upper housing 2. In this embodiment, the back panel 111 extends beyond the upper housing 2 on both the left and right sides. To prevent the fumes in the smoke collection chamber from escaping from the left and right sides of the back panel extending beyond the upper housing, the top panel 113 extends forward from the left and right sides of the back panel 111 that extend beyond the upper housing. Preferably, the top panel 113 is close to the lower end of the upper housing 2. Side panels 112 are disposed on the left and right sides of the top panel 113 and the back panel 111. The lower housing 11 may also include a bottom plate 114, the front end of the top panel 113 is bent downwards, the front end of the bottom plate 114 is connected to the lowest point of the bend in the front end of the top panel 113, and the rear end of the bottom plate 114 extends to the front side of the back panel 111 and is connected to the side panels 112. Optionally, the bottom plate 114 and the top panel 113 may be integral.

[0037] A smoke baffle 12 is disposed on the front side of the back panel 111, with its upper end or near the upper end used for connection, while its lower end is a free end. When open, it serves to collect smoke. The rear end of the first baffle 13 is used for connection, while its front end is a free end, allowing the air inlet 21 to be opened and closed. Second baffles 14 are spaced apart on the front side of the back panel 111 and located below the smoke baffle 12. An oil cup may be disposed at the bottom of the back panel 111 and the second baffle 14. In this embodiment, both the back panel 111 and the second baffle 14 are vertical or nearly vertical. When the smoke baffle 12 is closed, it extends in the same direction as the second baffle 14 and adheres closely to the side panel 112.

[0038] The air intake assembly 1 also includes a panel bracket 15, which is bent. In this embodiment, the panel bracket 15 is L-shaped, with part of it fixed to the rear side of the smoke baffle 12 and part of it fixed to the upper surface of the first baffle 13, thereby fixing the first baffle 13 and the smoke baffle 12 in an L-shape. The width of the first baffle 13 and the panel bracket 15 and the portion thereon are both adapted to the width of the air inlet 21 (width refers to the dimension in the left-right direction).

[0039] The range hood also includes a motion mechanism for driving the panel support 15 (smoke baffle 12 and first baffle 13) to move. The motion mechanism includes a drive mechanism 41 and a transmission mechanism. In this embodiment, the transmission mechanism is a connecting rod 421, one end of which is rotatably connected to the upper housing 2, with its rotation axis extending in the left-right direction. The other end is fixed to the rear side of the panel support 15. The drive mechanism 41 drives the connecting rod 421 to rotate; preferably, it can be a motor. The position where the connecting rod 421 connects to the upper housing 2 is its rotation center, and the panel support 15 rotates along a fixed axis.

[0040] The components of the aforementioned motion mechanism constitute the driving end of the motion mechanism, which also includes a driven end, which only has a transmission mechanism. The driving end and the driven end are respectively connected to positions arranged at intervals on the left and right sides of the smoke baffle 12. Furthermore, in this configuration, the smoke baffle 12 and the first baffle 13 remain fixed, and there is no mutual movement between sub-components, making it easy to control relevant parameter requirements (such as assembly clearance), and the overall structure is stable and reliable.

[0041] See Figures 8-11 The smoke baffle 12 and the first baffle 13 together can be L-shaped. Figure 8 The L-shaped transition is rounded. Figure 10 The angle between the two is an obtuse angle. Figure 9 The angle between the two is obtuse and the transition is rounded. Figure 11 The shape of the panel bracket 15 is adapted to this.

[0042] Therefore, the range hood of the present invention has at least a closed state and an open state (other states are intermediate states between the closed state and the open state).

[0043] See Figure 1 and Figure 2 At this time, the range hood is in the off state. The first baffle 13 closes the air inlet 11. The smoke baffle 12 is located in front of the back panel 111, covering the front of the back panel 111. It is roughly vertical, with the left and right sides attached to the side panel 112, and the bottom can be attached to the top of the second baffle 14.

[0044] See Figure 6 and Figure 7 The drive mechanism 41 pushes the connecting rod 421 along... Figure 7 The counterclockwise rotation shown causes the panel bracket 15 to rotate, pushing and flipping the smoke baffle 12 and the first baffle 13 outwards. When it is opened to its limit position, the first baffle 13 rotates to open the air inlet 21. The rear end of the first baffle 13 in the closed state is now close to the front edge of the air inlet 21, and the front end of the first baffle 13 in the closed state is now located inside the upper housing 2. The upper end of the smoke baffle 12 is located in front of the position when closed, close to the front edge of the air inlet 21. The first baffle 13 and the smoke baffle 1... The component consisting of 2 is the transition position between the first baffle 13 and the smoke baffle 12, or the front surface of the first baffle 13 or the smoke baffle 12. The smoke baffle 12 gradually slopes forward from top to bottom, and the smoke baffle 12 and the back plate 111 form a smoke collection chamber Q. The air inlet 21 is located at the top of the smoke collection chamber Q. The smoke collection chamber Q is fluidly connected to the upper housing 2 through the air inlet 21. Oil fumes enter the upper housing 2 from the rear side of the smoke baffle 12 and the first baffle 13 through the air inlet 11. At this time, the second baffle 14 can guide the oil fumes to flow into the smoke collection chamber Q. Alternatively, the second baffle 14 can be omitted, and the smoke baffle 12 can be adapted to the back plate 111 to form a full-screen form.

[0045] This embodiment achieves both a slim profile and effective smoke extraction by utilizing the movement of the baffle 12 and the first baffle 13 at the air inlet 21 of the range hood. This allows for a slim profile in the off state while maintaining a large air intake channel and a wide smoke collection area in the working state. This design also eliminates the need for an air intake channel in the air intake assembly 1. When closed, the baffle 12 can be close to the back panel 111, resulting in an extremely thin overall thickness for the air intake assembly 1, preferably around ten millimeters.

[0046] The term "fluid connectivity" as used in this invention refers to the spatial relationship between two components or parts (hereinafter referred to as the first part and the second part, respectively), that is, a fluid (gas, liquid, or a mixture of both) can flow from the first part along a flow path and / or be transported to the second part. This can be a direct connection between the first part and the second part, or an indirect connection between the first part and the second part through at least one third party. This third party can be a fluid channel such as a pipe, channel, conduit, guide, hole, or groove, or a chamber or combination thereof that allows fluid to flow through.

Claims

1. A range hood, comprising an air inlet assembly (1) and an upper housing (2), wherein the bottom surface of the upper housing (2) is provided with an air inlet (21), the air inlet assembly (1) comprises a lower housing (11) and a smoke baffle (12), the lower housing (11) comprising a back plate (111) connected to the rear side of the upper housing (2); characterized in that: The air intake assembly (1) further includes a first baffle (13), which has a first end and a second end opposite to each other. The first baffle (13) is fixedly disposed at the upper end of the smoke baffle (12). The smoke baffle (12) and the first baffle (13) are formed at a right angle or an obtuse angle. The smoke baffle (12) and the first baffle (13) have at least a closed state and an open state. In the closed state, the smoke baffle (12) is close to the back plate (111), the first baffle (13) closes the air inlet (21), and at this time the first end is located in front of the second end; In the open state, the first baffle (13) opens the air inlet (21), the smoke baffle (12) is pushed forward to form a smoke collection chamber (Q) between it and the back plate (111), the second end of the first baffle (13) is close to the front edge of the air inlet (21), and the first end of the first baffle (13) is located inside the upper box (2).

2. The range hood according to claim 1, characterized in that: In the open state, the assembly consisting of the first baffle (13) and the smoke baffle (12) abuts against the front edge of the air inlet (21).

3. The range hood according to claim 1, characterized in that: In the open state, the air inlet (21) is located at the top of the smoke collection chamber (Q), and the smoke collection chamber (Q) is in fluid communication with the upper box (2) through the air inlet (21).

4. The range hood according to any one of claims 1 to 3, characterized in that: The air intake assembly (1) also includes a panel bracket (15), which fixes the first baffle (13) and the smoke baffle (12) into one piece.

5. The range hood according to claim 4, characterized in that: The range hood also includes a motion mechanism for driving the panel support (15) to move. The motion mechanism includes a drive mechanism (41) and a connecting rod (421). One end of the connecting rod (421) is rotatably connected to the upper housing (2), and the other end of the connecting rod (421) is fixed to the rear side of the panel support (15). The drive mechanism (41) is used to drive the connecting rod (421) to rotate around the left and right extending axis.

6. The range hood according to claim 5, characterized in that: The connecting rod (421) is curved and protrudes backward.

7. The range hood according to claim 4, characterized in that: The shape of the panel bracket (15) is adapted to the overall shape formed by the smoke baffle (12) and the first baffle (13).

8. The range hood according to claim 7, characterized in that: The smoke baffle (12) and the first baffle (13) have a rounded transition.

9. The range hood according to any one of claims 1 to 3, characterized in that: The lower housing (11) also includes a top plate (113) and a bottom plate (114). The top plate (113) is formed by extending forward from the top of the back plate (111). The width of the back plate (111) is greater than the width of the upper housing (2). The top plate (113) is located on the left and right sides of the upper housing (2). The front end of the bottom plate (114) is connected to the front end of the top plate (113). The rear end of the bottom plate (114) extends to the front side of the back plate (111).

10. The range hood according to any one of claims 1 to 3, characterized in that: The air intake assembly (1) also includes a second baffle (14), which is disposed on the front side of the back plate (111). When closed, the smoke baffle (12) is located above the second baffle (14).

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