Range hood

Abstract

The utility model relates to a range hood, which comprises a casing, a smoke inlet chamber, a smoke outlet and a smoke outlet, the panel is rotationally arranged at the front part of the machine shell and can open and close the opening in the front part of the smoke inlet chamber; the air conditioner further comprises an air inlet assembly connected between the back face of the panel and the machine shell, the air inlet assembly comprises an air inlet plate and two side plate assemblies extending towards the interior of the machine shell from the left side and the right side of the back face of the panel, and an air inlet is formed in the air inlet plate. The side edge of the bottom of the air inlet plate is rotationally connected to the machine shell around a first axis extending left and right, the side edge of the top of the air inlet plate is restrained on the back face of the panel in an up-down sliding mode, and in the process that the panel deflects forwards and is opened, the air inlet plate deflects forwards around the side edge of the bottom of the air inlet plate. And an air inlet chamber communicated with the smoke inlet chamber is defined by the air inlet plate, the left side plate, the right side plate and the panel. The range hood has the advantages that the negative pressure area can move downwards, and the lampblack suction effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a range hood. Background Art

[0002] Range hoods are kitchen appliances that purify the kitchen environment. Range hoods generally include top-suction range hoods and close-suction range hoods. Top-suction range hoods are more beautiful, but their smoke inlet is higher and the smoke extraction effect is limited; compared with top-suction range hoods, close-suction range hoods have lower smoke inlets. However, affected by the appearance structure and internal air duct structure of close-suction range hoods, current close-suction range hoods cannot get closer to the smoke, which greatly limits their smoke extraction effect.

[0003] In order to meet the needs of a lightweight design of the range hood, the range hood will be designed to be thin, that is, the front and rear depth of the casing will be made thin. For example, the Chinese utility model patent application with application number CN202020066610.2 (authorization announcement number: CN211822584U) discloses a range hood, comprising a shell and a fan system arranged in the shell, the lower portion of the shell having a vertically extending smoke inlet chamber, the front side wall of the lower portion of the shell having a smoke inlet port connected to the smoke inlet chamber, and a smoke baffle extending forward horizontally or obliquely is arranged along the upper edge of the smoke inlet port.

[0004] However, the above-mentioned range hoods still have certain shortcomings. The opening direction of the air inlet of this type of range hood is generally horizontally facing forward, which makes the air inlet direction of the range hood and the rising direction of oil smoke have a certain angle, which is not conducive to the inhalation of oil smoke. When stir-frying, the oil smoke will escape from the sides and the front.

[0005] Therefore, existing range hoods need further improvement. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a range hood which can move the negative pressure area downward and improve the oil fume absorbing effect in view of the current status of the prior art.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: a range hood, comprising:

[0008] a casing having a smoke inlet chamber with an open front;

[0009] A panel is rotatably disposed at the front of the housing and is capable of opening and closing the front opening of the smoke inlet chamber;

[0010] It also includes an air inlet assembly connected between the back side of the panel and the casing, the air inlet assembly includes an air inlet plate and two side panel assemblies extending from the left and right sides of the back side of the panel toward the casing, the air inlet plate is provided with an air inlet, the bottom side of the air inlet plate is rotatably connected to the casing around a first axis extending left and right, the top side of the air inlet plate is constrained to slide up and down on the back side of the panel, and when the panel is deflected forward and opened, the air inlet plate deflects forward around its bottom side, and together with the left and right side panels and the panel, defines an air inlet chamber connected to the smoke inlet chamber.

[0011] In order to realize the non-fixed-axis rotation connection between the air inlet plate and the panel bracket, the left and right sides of the back side of the panel are provided with connecting brackets arranged side by side and extending in the up and down directions. Each connecting bracket is provided with a first sliding groove extending along its length direction. The left and right sides of the top edge of the air inlet plate are correspondingly slidably connected in the first sliding groove of the corresponding connecting bracket through a first limit pin.

[0012] In order to arrange the negative pressure zone as low and forward as possible and improve the oil fume absorption effect, when the panel is in the open state, the position on the panel connected to the air inlet plate is close to the bottom edge of the panel.

[0013] As an improvement, when the panel is in the open state, the air inlet plate is tilted backward from top to bottom. The air inlet plate is tilted backward from top to bottom, so that the air inlet on the air inlet plate faces forward and downward, that is, toward the smoke source, to ensure that the oil smoke can be smoothly sucked and discharged when it rises; on the other hand, the air inlet plate is tilted backward from top to bottom, which also facilitates the oil to flow toward the bottom of the casing and collect in the oil cup.

[0014] Generally speaking, the side panel assembly can be a non-folding plate structure, but considering the limited front and rear dimensions of the casing, the side panel assembly cannot be well hidden in the casing. For this reason, the side panel assembly is a telescopic panel assembly that can be expanded as the panel deflects forward and folded as it deflects backward.

[0015] In order to simplify the structure of the telescopic panel assembly, the side panel assembly includes a first side panel and a second side panel sequentially arranged in the left and right directions, the first side panel is connected to the back of the panel and extends toward the inside of the housing, the top of the second side panel is rotatably arranged on the housing around a second axis extending left and right, one of the first side panel and the second side panel is provided with an arc-shaped slide groove centered on the above-mentioned second axis, and the other is provided with a second limit pin that can be slidably constrained in the arc-shaped slide groove. When the panel is deflected forward and opened, the first side panel will move forward with the panel, and when the pin shaft moves to the limit position of the arc-shaped slide groove, the second side panel can also be driven to move forward through the limit between the two, thereby ensuring that the panel can be opened forward to a sufficiently large angle. When the panel is deflected backward and closed, the first side panel and the second side panel will move backward with the panel, and at the same time, the first side panel and the second side panel can move relatively and fold together and be stored in the housing together.

[0016] In order to ensure the smoke-collecting effect and reduce the escape of oil smoke from the left and right sides, the first side panel and the second side panel are both fan-shaped panels, and when the panels are in the open state, the bottom edge of the first side panel and the bottom edge of the second side panel are both lower than the top edge of the air inlet plate.

[0017] In order to ensure the overall aesthetics of the range hood in the off state, when the panel is in the closed state, the air inlet assembly is stored in the smoke inlet chamber of the casing.

[0018] Generally, the panel can be opened manually by the user, but in order to realize the automatic control of the panel and the air inlet assembly, a driving device is also provided in the housing, and the power output end of the driving device is connected to the back of the panel, thereby driving the panel to flip forward and backward. The range hood is generally provided with an oil fume concentration sensor, and the driving device and the oil fume concentration sensor can be electrically connected to the control system of the range hood, so that the control system can control the action of the driving device according to the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby driving the panel to open and close.

[0019] As an improvement, the driving device includes an electric push rod, the main body of which is hinged on the rear side wall of the housing, and the end of the telescopic rod of the electric push rod is rotatably connected to the panel. It is conceivable that the driving device can also use a motion mechanism formed by a driving motor and a hinge assembly to drive the panel to deflect.

[0020] The technical solution adopted by the utility model to solve the above technical problems is:

[0021] Compared with the prior art, the advantages of the utility model are as follows: when the panel is deflected forward and opened, the top of the air inlet plate can slide downward along the vertical direction of the panel, that is, the air inlet plate as a whole deflects forward and downward, thereby, the panel, the air inlet plate and the left and right side panel components form a negative pressure cavity (air inlet chamber), the negative pressure area of ​​the negative pressure cavity is further down, the air inlet is smoother, and the oil fume absorption effect is better. On the other hand, the existence of the above-mentioned negative pressure cavity can also reduce part of the aerodynamic noise, and at the same time, the air inlet is lower than the existing air inlet position, relatively farther away from the human ear, the sensory noise is smaller, and the user experience is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional structural schematic diagram of a range hood according to an embodiment of the utility model (the panel is in an open state);

[0023] Figure 2 This is a left side view of the range hood according to the embodiment of the utility model (the panel is in the open state);

[0024] Figure 3 for Figure 2 The schematic diagram of the structure after the side panel assembly on the left side is omitted;

[0025] Figure 4 A vertical cross-sectional view of the range hood according to an embodiment of the utility model cut along the front-to-back direction;

[0026] Figure 5 It is a three-dimensional structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0028] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations 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.

[0029] Figure 1-Figure 5A preferred embodiment of the range hood of the utility model is shown. The range hood comprises a housing 10 and a centrifugal fan 14 arranged in the housing 10. The housing 10 defines a smoke inlet chamber 100 which is open at the front. A panel 11 is also arranged at the front of the housing 10. The top of the panel 11 can be rotatably connected to the housing 10 through a hinge mechanism. The panel 11 extends in the left-right direction relative to the rotation axis of the housing 10. The panel 11 can open and close the front opening of the housing 10 as it rotates relative to the housing 10. When the panel 11 is in a state of closing the front opening of the housing 10, the panel 11 basically extends vertically. The centrifugal fan 14 is arranged in the housing 10. When the centrifugal fan 14 is in operation, negative pressure is generated, and external oil smoke can be sucked into the housing 10. An oil cup 12 is arranged at the bottom of the housing 10. The oil cup 12 is in the shape of a long strip extending left and right, and is used to receive oil stains flowing down from the housing 10.

[0030] The panel 11 is driven by a driving device to deflect forward and backward relative to the main body of the housing 10. Specifically, the driving device of this embodiment adopts an electric push rod 30, the main body of which is mounted on the rear side wall of the housing 10 through a hinge seat, and the end of the telescopic rod of the electric push rod 30 is rotatably connected to the back of the panel 11. When the electric push rod 30 is extended, the panel 11 deflects forward to open, and when the electric push rod 30 is retracted, the panel 11 deflects backward to close.

[0031] An air inlet assembly 2 is further provided between the back of the panel 11 and the front opening of the housing 10. When the panel 11 is closed, the air inlet assembly 2 is offset backward with the panel 11 and is correspondingly stored in the smoke inlet chamber 100 of the housing 10. When the panel 11 is opened, the air inlet assembly 2 is offset forward with the panel 11 and is correspondingly exposed to the outside of the smoke inlet chamber 100 of the housing 10.

[0032] The air inlet assembly 20 includes an air inlet plate 21 and two left and right side plate assemblies. The two side plate assemblies are arranged on the left and right sides of the panel 11, respectively, and both extend toward the inside of the housing 10. An air inlet 210 is provided on the air inlet plate 21. The bottom side of the air inlet plate 21 can be rotatably connected to the bottom of the front opening of the housing 10 through a rotating shaft extending left and right (the axis of the rotating shaft is the first axis), and the left and right sides of the top side of the air inlet plate 21 are connected to the back of the panel 11 in a non-fixed axis rotation. Specifically, the left and right sides of the back of the panel 11 are provided with connecting brackets 111 arranged side by side and extending in the up-down direction, and each connecting bracket 111 is provided with a first slide groove 1110 extending along its length direction, and the left and right sides of the top of the air inlet plate 21 are slidably connected in the first slide groove 1110 of the corresponding connecting bracket 111 through the first limit pins 211 extending left and right. Specifically, when the panel 11 is deflected forward and opened, the first limit pin 211 on the air inlet plate 21 slides downward along the first slide groove 1110 of the two connecting brackets 111, and the top of the air inlet plate 21 deflects forward and downward along with the panel 11. When the panel 11 is opened to the extreme position, the air inlet plate 21 tilts backward from top to bottom, and the position where the top of the air inlet plate 21 connects with the panel 11 also corresponds to the bottom wall edge of the panel 11. Thus, the panel 11, the air inlet plate 21 and the left and right side panel components form a negative pressure chamber (air inlet chamber 200), and the negative pressure area of ​​the negative pressure chamber is further down, the air intake is smoother, and the oil fume absorption effect is better. On the other hand, the existence of the above-mentioned negative pressure chamber can also reduce part of the aerodynamic noise. At the same time, the air inlet 210 is located lower than the existing air inlet 210, relatively farther away from the human ear, and the sensory noise is smaller, which also improves the user experience.

[0033] When the panel 11 is in the closed state, the panel 11 is arranged vertically, so that the overall front-to-back dimensions of the range hood are smaller when it is turned off, reducing the sense of space oppression for the user. At the same time, the air inlet plate 21 of the air inlet assembly 20 is basically erected at the front opening of the housing 10, and only two side panel assemblies are stored in the left and right sides of the smoke inlet chamber 100 of the housing 10, which will not occupy too much space in the inner cavity of the housing 10, avoiding interference with the installation of major components such as the centrifugal fan 12. The air inlet plate 21 is arranged vertically, which also facilitates the oil to drip downward, and then collect into the oil cup through the bottom wall of the housing 10 from front to back and downward.

[0034] The side panel assembly of this embodiment is a telescopic panel assembly that can be expanded and retracted as the panel 11 deflects forward and deflects backward. Specifically, the side panel assembly includes a first side panel 22 and a second side panel 23 arranged in sequence in the left and right directions, and the first side panel 22 and the second side panel 23 are both fan-shaped and fit together. The tops of the two fan-shaped side panels extend to the position where the rotation axis of the panel 11 relative to the housing 10 is located. The first side panel 22 is connected to the back of the panel 11 with one side and extends toward the housing 10, while the top of the second side panel 23 is rotatably connected to the housing 10 through a pin extending left and right (the axis of the pin is the second axis, and the second axis is colinear with the axis of the panel 11 deflecting relative to the housing 10). An arc-shaped slide groove 230 is opened on one of the second side panels 23, and the arc-shaped slide groove 230 is centered on the above-mentioned second axis. A second stop pin 220 is correspondingly provided on the first side panel 22, and the second stop pin 220 is slidably constrained in the arc-shaped slide groove 230. When the panel 11 is deflected forward to open, the first side panel 22 will move forward with the panel 11. When the second limit pin 220 moves to the limit position of the arc-shaped slide groove 230, the second side panel 23 can also move forward through the limit between the two, thereby ensuring that the panel 11 can be opened forward to a sufficiently large angle. When the panel 11 is deflected backward to close, the first side panel 22 and the second side panel 23 will move backward with the panel 11, and at the same time, the first side panel 22 and the second side panel 23 can move relatively and fold together, and be stored together in the housing 10. When the panel 11 is in the open state, the bottom edge of the first side panel 22 and the bottom edge of the second side panel 23 are both lower than the top edge of the air inlet plate 21, thereby forming an upwardly concave smoke-collecting concave area, ensuring the smoke-collecting effect and reducing the escape of oil smoke from the left and right sides.

[0035] An oil fume concentration sensor is generally provided on the casing 10 of the range hood. The above-mentioned driving device and the oil fume concentration sensor can be electrically connected to the control system of the range hood. Thus, the control system can control the action of the driving device according to the oil fume concentration signal transmitted by the oil fume concentration sensor, thereby driving the panel 11 to open and close.

Claims

1. A range hood, comprising: A housing (10) having a smoke inlet chamber (100) with an open front; A panel (11) is rotatably disposed on the front of the housing (10) and is capable of opening and closing the front opening of the smoke inlet chamber (100); The invention is characterized in that it also includes an air inlet assembly (20) connected between the back side of the panel (11) and the casing (10), the air inlet assembly (20) including an air inlet plate (21) and two side plate assemblies extending from the left and right sides of the back side of the panel (11) toward the casing (10), an air inlet port (210) is provided on the air inlet plate (21), the bottom side edge of the air inlet plate (21) is rotatably connected to the casing (10) around a first axis extending left and right, the top side edge of the air inlet plate (21) is slidably constrained on the back side of the panel (11) up and down, and when the panel (11) is deflected forward to open, the air inlet plate (21) deflects forward around its bottom side edge, and together with the left and right side plates and the panel (11) defines an air inlet chamber (200) connected to the smoke inlet chamber (100).

2. The range hood according to claim 1, characterized in that: The left and right sides of the back side of the panel (11) are provided with connecting brackets (111) arranged side by side and extending in the up-down direction, and each connecting bracket (111) is provided with a first sliding groove (1110) extending in its length direction, and the left and right sides of the top edge of the air inlet plate (21) are correspondingly slidably connected in the first sliding groove (1110) of the corresponding connecting bracket (111) through a first limiting pin (211).

3. The range hood according to claim 1, characterized in that: When the panel (11) is in an open state, the position on the panel (11) that is connected to the air inlet plate (21) is close to the bottom edge of the panel (11).

4. The range hood according to claim 1, characterized in that: When the panel (11) is in an open state, the air inlet plate (21) tilts backward from top to bottom.

5. The range hood according to any one of claims 1 to 4, characterized in that: The side panel assembly is a telescopic panel assembly that can be expanded as the panel (11) deflects forward and folded as it deflects backward.

6. The range hood according to claim 5, characterized in that: The side panel assembly comprises a first side panel (22) and a second side panel (23) which are sequentially arranged in the left-right direction, wherein the first side panel (22) is connected to the back side of the panel (11) and extends toward the inside of the housing (10), and the top of the second side panel (23) is rotatably arranged on the housing (10) around a second axis extending left-right, and one of the first side panel (22) and the second side panel (23) is provided with an arc-shaped slide groove (230) centered on the above-mentioned second axis, and the other is provided with a second limit pin (220) which can be slidably constrained in the arc-shaped slide groove (230).

7. The range hood according to claim 6, characterized in that: The first side panel (22) and the second side panel (23) are both fan-shaped panels, and when the panel (11) is in an open state, the bottom edge of the first side panel (22) and the bottom edge of the second side panel (23) are both lower than the top edge of the air inlet plate (21).

8. The range hood according to any one of claims 1 to 4, characterized in that: When the panel (11) is in a closed state, the air inlet assembly (20) is accommodated in the smoke inlet chamber (100) of the casing (10).

9. The range hood according to any one of claims 1 to 4, characterized in that: A driving device is also provided in the casing (10), and a power output end of the driving device is connected to the back side of the panel (11), thereby driving the panel (11) to flip forward and backward.

10. The range hood according to claim 9, characterized in that: The driving device comprises an electric push rod (30), the main body of which is hinged on the rear side wall of the casing (10), and the end of the telescopic rod of the electric push rod (30) is rotatably connected to the panel (11).

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