Downdraft range hood

Abstract

The utility model discloses a downdraft range hood. The downdraft range hood comprises a base, a fan, a smoke deflector and a first lifting driving mechanism, the machine base is provided with a smoke collecting air duct, an air inlet and an air outlet, and the air inlet is located at the upper end of the machine base and communicates with the smoke collecting air duct; the draught fan is arranged on the machine base and located in the smoke collecting air duct, and the draught fan is used for forming air flow from the air inlet to the air outlet in the smoke collecting air duct; the smoke guide plate is arranged on the machine base in a lifting mode and can ascend till the upper end of the smoke guide plate is higher than the air inlet, and the smoke guide plate is arranged in the vertical direction and located on the side, in the horizontal direction, of the smoke collection air flue. The first lifting driving mechanism is arranged on the machine base and used for driving the smoke guide plate to ascend and descend.

Description

Technical Field

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

[0002] Some existing downdraft range hoods are installed inside a stovetop and consist of a base and a fan. The base has a smoke collection duct, the upper air inlet of which is fixed to the stovetop surface. The fan is located within the duct, and the air outlet of the duct is connected to the exhaust pipe. When the range hood is turned on, the fan creates an airflow from the air inlet to the air outlet in the duct, generating a downward wind force at the air inlet to extract cooking fumes. However, the extraction capacity of these downdraft range hoods is still insufficient in some cases. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides a downdraft range hood that can improve the ability to extract oil smoke.

[0004] According to an embodiment of the utility model, a downdraft range hood comprises a base, a fan, a smoke guide plate, and a first lifting drive mechanism. The base is provided with a smoke collection duct, an air inlet, and an air outlet, wherein the air inlet is located at the upper end of the base and is connected to the smoke collection duct; the fan is provided on the base and located within the smoke collection duct, and is used to form an airflow from the air inlet to the air outlet within the smoke collection duct; the smoke guide plate is liftably provided on the base and can be raised to a position where the upper end of the smoke guide plate is higher than the air inlet; the smoke guide plate is provided in a vertical direction and is located on one side of the smoke collection duct in a horizontal direction; the first lifting drive mechanism is provided on the base and is used to drive the smoke guide plate to rise and fall.

[0005] The downdraft range hood according to the embodiment of the present invention has at least the following beneficial effects: when the range hood is started, the fan generates an airflow from the air inlet to the air outlet in the smoke collecting duct, thereby sucking the cooking fumes through the air inlet; when the oil smoke is large and a stronger suction effect is required, the first lifting drive mechanism can drive the smoke guide plate to rise, so that the upper end of the smoke guide plate is higher than the air inlet. At this time, the smoke guide plate can guide the airflow, thereby improving the air inlet's ability to suck the oil smoke.

[0006] According to some embodiments of the present invention, a light-emitting component is further included, the smoke guide plate is a light-transmitting component, the light-emitting component is located on one side of the smoke guide plate, and the light-emitting direction of the light-emitting component is toward the smoke guide plate.

[0007] According to some embodiments of the present invention, the base includes a main shell and a middle partition, the main shell is provided with a accommodating cavity, the middle partition is arranged in the main shell and is located in the accommodating cavity, the middle partition divides the accommodating cavity to form the smoke collecting duct and the lifting cavity, the smoke guide plate is located in the lifting cavity, the first lifting drive mechanism includes a mounting structure and a first lifting drive, the first lifting drive is located in the smoke collecting duct, the middle partition is provided with a clearance groove extending in the up and down directions, the mounting structure is passed through the clearance groove, and the first lifting drive is connected to the smoke guide plate through the mounting structure.

[0008] According to some embodiments of the present invention, the mounting structure is provided with a mounting groove along the up-down direction, and the lower end of the smoke guide plate is embedded in the mounting groove.

[0009] According to some embodiments of the present invention, a light bar is provided at the bottom of the mounting groove, the light bar is located on the lower side of the smoke guide plate, the light emitting direction of the light bar is set upward, and the smoke guide plate is a light-transmitting glass piece.

[0010] According to some embodiments of the present invention, the first lifting drive is installed on the middle partition and covers the clearance slot.

[0011] According to some embodiments of the present invention, an air duct cover and an opening and closing drive mechanism are further included. The air duct cover is movably arranged on the machine base and can open or close the air inlet. The opening and closing drive mechanism is arranged on the machine base and is used to drive the air duct cover to move.

[0012] According to some embodiments of the present invention, the air duct cover is rotatably connected to the base along a first axis, the opening and closing drive mechanism includes a second lifting drive, the second lifting drive is rotatably connected to the air duct cover along a second axis, and the first axis and the second axis are arranged in parallel and spaced apart.

[0013] According to some embodiments of the present invention, a filter screen is further included. The filter screen is arranged on the machine base and located in the smoke collecting air duct, and the filter screen is arranged obliquely.

[0014] According to some embodiments of the present invention, a lower support leg is further included, wherein the lower support leg is arranged on the machine base in an adjustable position along the up and down directions, and the lower part of the lower support leg extends out of the machine base.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 This is a three-dimensional schematic diagram of a downdraft range hood according to an embodiment of the present invention when installed on a stove;

[0018] Figure 2 This is a three-dimensional schematic diagram of a downdraft range hood according to an embodiment of the utility model when not started;

[0019] Figure 3 For the embodiment of the utility model Figure 2 A cross-sectional schematic diagram in the AA direction;

[0020] Figure 4 This is a three-dimensional schematic diagram of a downdraft range hood with the smoke guide plate raised according to an embodiment of the utility model;

[0021] Figure 5 For the embodiment of the utility model Figure 4 Schematic cross-sectional view in the BB direction.

[0022] Reference numerals:

[0023] Machine base 100, smoke collecting duct 110, air inlet 120, air outlet 130, main shell 140, middle partition 150, accommodating chamber 160, lifting chamber 170;

[0024] Fan 200;

[0025] Smoke guide plate 300;

[0026] First lifting drive mechanism 400, mounting structure 410, mounting slot 411, first lifting drive 420;

[0027] Light bar 500;

[0028] Air duct cover 600;

[0029] Opening and closing drive mechanism 700;

[0030] Filter 800;

[0031] Lower support leg 900;

[0032] Stove 1000. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientation or positional relationship indicated by up, down, etc., are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0035] In the description of this utility model, "a plurality" means more than two. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features indicated, or implicitly indicating the order of the technical features indicated.

[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0037] Reference Figures 1 to 5 , which is a downdraft range hood according to an embodiment of the present invention, comprises a base 100, a fan 200, a smoke guide plate 300, and a first lifting drive mechanism 400. The base 100 is provided with a smoke collecting duct 110, an air inlet 120, and an air outlet 130. The air inlet 120 is located at the upper end of the base 100 and is connected to the smoke collecting duct 110. The fan 200 is provided on the base 100 and is located in the smoke collecting duct 110. The fan 200 is used to form an airflow from the air inlet 120 to the air outlet 130 in the smoke collecting duct 110. The smoke guide plate 300 is arbitrarily provided on the base 100 and can be raised to a position where the upper end of the smoke guide plate 300 is higher than the air inlet 120. The smoke guide plate 300 is arranged in the vertical direction and is located on one side of the smoke collecting duct 110 in the horizontal direction. The first lifting drive mechanism 400 is provided on the base 100 and is used to drive the smoke guide plate 300 to rise and fall.

[0038] When the range hood is started, the fan 200 generates an airflow from the air inlet 120 to the air outlet 130 in the smoke collecting duct 110, thereby sucking the cooking fumes through the air inlet 120; when the fumes are larger and a stronger suction effect is required, the first lifting drive mechanism 400 can drive the smoke guide plate 300 to rise, so that the upper end of the smoke guide plate 300 is higher than the air inlet 120. At this time, the smoke guide plate 300 can guide the airflow, thereby improving the air inlet 120's ability to suck the fumes.

[0039] It is understandable that in some embodiments, when the amount of oil smoke is small, the user can choose not to raise the smoke guide plate 300. In this case, less space is occupied on the stove top, making cooking more convenient.

[0040] Optionally, the smoke deflector 300 may be raised when the range hood is activated, allowing the range hood to maintain a high fume extraction capacity in normal operation. When the range hood is turned off, the first lifting drive mechanism 400 drives the smoke deflector 300 downward, ensuring that the smoke deflector 300 is no higher than the stovetop, thereby saving stovetop space when the range hood is not in use.

[0041] In this embodiment, a light-emitting assembly is also included. The smoke guide plate 300 is a light-transmitting member. The light-emitting assembly is located on one side of the smoke guide plate 300, with light emitted from the light-emitting assembly directed toward the smoke guide plate 300. The light-emitting assembly can transmit light into the smoke guide plate 300, causing the smoke guide plate 300 to emit light. The smoke guide plate 300 can provide a certain degree of illumination for the cooking area, thereby improving the brightness of the cooking area. Specifically, the light-emitting assembly is a light bar 500. It is contemplated that in other implementations, the light-emitting assembly can also be a light strip or light panel.

[0042] In an embodiment, the base 100 includes a main shell 140 and a middle partition 150. The main shell 140 is provided with a accommodating cavity 160. The middle partition 150 is arranged in the main shell 140 and is located in the accommodating cavity 160. The middle partition 150 divides the accommodating cavity 160 to form a smoke collecting duct 110 and a lifting cavity 170. The smoke guide plate 300 is located in the lifting cavity 170. The first lifting drive mechanism 400 includes a mounting structure 410 and a first lifting drive 420. The first lifting drive 420 is located in the smoke collecting duct 110. The middle partition 150 is provided with a clearance groove extending in the up and down directions. The mounting structure 410 is passed through the clearance groove. The first lifting drive 420 is connected to the smoke guide plate 300 through the mounting structure 410. The smoke guide plate 300 is located in the lifting chamber 170, which can reduce the risk of oil smoke in the smoke collecting duct 110 condensing on the smoke guide plate 300, making it easy to maintain the smoke guide plate 300 clean for a long time and the smoke guide plate 300 is not easily contaminated; the first lifting drive 420 is located in the smoke collecting duct 110, and is connected to the smoke guide plate 300 through the clearance groove through the mounting structure 410, which is conducive to making the down-draft range hood structure more compact and reducing the volume of the down-draft range hood.

[0043] In an embodiment, the mounting structure 410 is provided with a mounting groove 411 along the vertical direction, and the lower end of the smoke guide plate 300 is embedded in the mounting groove 411. By inserting the lower end of the smoke guide plate 300 into the mounting groove 411, the mounting structure 410 is connected to the smoke guide plate 300 and moves synchronously. The mounting structure 410 is simple and does not require a specific mounting structure 410 to be provided on the smoke guide plate 300, and the manufacturability is good. It is conceivable that in other embodiments, the mounting structure 410 can also be connected to the smoke guide plate 300 by other means, for example, the mounting structure 410 is fixedly connected to the smoke guide plate 300 by screw locking, or the mounting structure 410 is fixedly connected to the smoke guide plate 300 by a bolt and nut pair; or a magnet is provided on the smoke guide plate 300, and an iron block is provided on the mounting structure 410, and the connection is achieved by magnetic attraction, etc.

[0044] In this embodiment, a light bar 500 is disposed at the bottom of the mounting slot 411. The light bar 500 is positioned below the smoke guide plate 300, with light emitting from the light bar 500 directed upward. The smoke guide plate 300 is formed of translucent glass. Because the smoke guide plate 300 is arranged in an up-down direction, the light bar 500 directs light upward toward the underside of the smoke guide plate 300, resulting in a relatively uniform illumination across the entire glass smoke guide plate 300.

[0045] It is conceivable that in other embodiments, the light bar 500 may also be located on the upper side of the smoke guide plate 300, in which case the light emitting direction of the light bar 500 is set downward; or the light bar 500 may also be located on the left and right sides of the smoke guide plate 300, in which case the light emitting direction of the light bar 500 is toward the smoke guide plate 300.

[0046] In this embodiment, the first lift actuator 420 is mounted on the middle partition 150 and covers the clearance slot. Because the clearance slot extends vertically, it is possible for oil smoke within the smoke collection duct 110 to enter the lift chamber 170 through the clearance slot, or for air within the lift chamber 170 to enter the smoke collection duct 110 through the clearance slot, thereby reducing the suction force at the air inlet 120. Therefore, the first lift actuator 420 is mounted on the middle partition 150 and covers the clearance hole. This prevents oil smoke within the smoke collection duct 110 from entering the lift chamber 170 through the clearance slot, and prevents air within the lift chamber 170 from entering the smoke collection duct 110 through the clearance slot, thereby improving the oil smoke extraction capacity at the air inlet 120.

[0047] Specifically, the first lifting driver 420 is an electric push rod, and the mounting structure 410 includes a mounting frame composed of several parts, and the mounting frame forms a mounting slot 411. It is conceivable that in other embodiments, the first lifting driver 420 can also be a pneumatic cylinder, an oil cylinder, etc. It is conceivable that in other embodiments, the first lifting drive mechanism 400 can also be a pneumatic cylinder, an electric push rod, etc., and the first lifting drive mechanism 400 is disposed in the lifting chamber 170; or the first lifting drive mechanism 400 includes a motor, a gear, and a rack, the rack is arranged in the up-down direction and mounted on the smoke guide plate 300, the motor is mounted on the base 100, and the gear is connected to the output shaft of the motor. The motor drives the rack to rise and fall through the gear, thereby driving the smoke guide plate 300 to rise and fall.

[0048] Specifically, the base 100 is provided with a slide groove, and the left and right sides of the smoke guide plate 300 are slidably connected to the slide groove, so that the smoke guide plate 300 can slide vertically relative to the base 100. It is conceivable that in other embodiments, a pair of guide wheels can be provided on the base 100, and the pair of guide wheels are placed on both sides of the smoke guide plate 300 to limit and guide the smoke guide plate 300.

[0049] In this embodiment, the range hood further includes an air duct cover 600 and an opening and closing drive mechanism 700. The air duct cover 600 is movably mounted on the base 100 and can open and close the air inlet 120. The opening and closing drive mechanism 700 is mounted on the base 100 and is used to drive the movement of the air duct cover 600. When the range hood is not in operation, the opening and closing drive mechanism 700 positions the air duct cover 600 to close the air inlet 120, preventing foreign matter from accidentally falling into the smoke collection duct 110. When the range hood is in operation, the opening and closing drive mechanism 700 drives the air duct cover 600 to open the air inlet 120, allowing normal extraction of cooking fumes and providing greater convenience.

[0050] In this embodiment, the air duct cover 600 is rotatably connected to the base 100 along a first axis. The opening and closing drive mechanism 700 includes a second lift actuator, which is rotatably connected to the air duct cover 600 along a second axis. The first and second axes are parallel and spaced apart. The second lift actuator pulls the air duct cover 600, causing it to rotate about the first axis to open or close the air inlet 120. This opening and closing method is relatively simple and easy to implement.

[0051] Specifically, the second lifting actuator is an electric push rod, which is rotatably connected to the air duct cover 600 along the second axis through an extension rod. It is conceivable that in other embodiments, the second lifting actuator can also be a linear actuator such as a pneumatic cylinder or an oil cylinder.

[0052] It is conceivable that in other embodiments, the air duct cover 600 can be rotatably arranged on the base 100, in which case the opening and closing drive mechanism 700 can be a reduction motor, which is connected to the air duct cover 600 to drive the air duct cover 600 to rotate and open and close the air inlet 120; or the air duct cover 600 can be slid horizontally in the horizontal direction through a sliding rail slider structure to open and close the air inlet 120, in which case the opening and closing drive mechanism 700 can be an electric push rod, a cylinder or an oil cylinder and other structures to drive the air duct cover 600 to slide.

[0053] In this embodiment, a filter 800 is further included. The filter 800 is disposed on the base 100 and within the smoke collecting duct 110. The filter 800 is tilted. The tilt of the filter 800 allows the oil smoke entering from the air inlet 120 to have a larger contact area with the filter 800, thereby improving the efficiency of the filter 800 in filtering the oil smoke and achieving better performance.

[0054] In this embodiment, a lower support leg 900 is further included. The lower support leg 900 is vertically adjustable and disposed on the base 100. The lower portion of the lower support leg 900 extends out of the base 100. The lower support leg 900 can be adjusted in position. By pressing the lower support leg 900 against the ground, the range hood is provided with a certain degree of support, thereby enhancing the secure installation of the range hood.

[0055] Specifically, the lower support leg 900 is a rod having a plurality of gear holes arranged vertically thereon. The lower support leg 900 is locked to the base 100 by screws engaging the different gear holes, thereby enabling the lower support leg 900 to be adjusted vertically to support the base 100. It is conceivable that the lower support leg 900 can also be adjusted vertically by other structures. For example, the lower support leg 900 may be provided with a stud portion, the base 100 may be provided with a threaded hole, the stud portion being vertically threadedly connected to the threaded hole, and the extension length of the lower support leg 900 may be adjusted by twisting the lower support leg 900.

[0056] Specifically, the fan 200 is a centrifugal fan 200; the smoke exhauster further includes a smoke exhaust pipe, one end of which is connected to the air outlet 130, and the airflow in the smoke collecting duct 110 is discharged into the external environment through the smoke exhaust pipe.

[0057] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A downdraft range hood, characterized in that: include: A machine base (100) is provided with a smoke collecting air duct (110), an air inlet (120) and an air outlet (130), wherein the air inlet (120) is located at the upper end of the machine base (100) and is in communication with the smoke collecting air duct (110); a fan (200), arranged on the machine base (100) and located in the smoke collecting air duct (110), the fan (200) being used to form an air flow from the air inlet (120) to the air outlet (130) in the smoke collecting air duct (110); A smoke guide plate (300) is movably arranged on the machine base (100) and can be raised until the upper end of the smoke guide plate (300) is higher than the air inlet (120), and the smoke guide plate (300) is arranged in the up-down direction and is located on one side of the smoke collecting air duct (110) in the horizontal direction; A first lifting drive mechanism (400) is provided on the machine base (100) and is used to drive the smoke guide plate (300) to move up and down.

2. The downdraft range hood according to claim 1, characterized in that: It also includes a light-emitting component, the smoke guide plate (300) is a light-transmitting component, the light-emitting component is located on one side of the smoke guide plate (300), and the light-emitting direction of the light-emitting component is toward the smoke guide plate (300).

3. The downdraft range hood according to claim 1, characterized in that: The machine base (100) comprises a main shell (140) and a middle partition (150); the main shell (140) is provided with a receiving cavity (160); the middle partition (150) is arranged on the main shell (140) and is located in the receiving cavity (160); the middle partition (150) separates the receiving cavity (160) to form the smoke collecting duct (110) and the lifting cavity (170); the smoke guide plate (300) is located in the lifting cavity (170). The first lifting drive mechanism (400) includes a mounting structure (410) and a first lifting drive (420), the first lifting drive (420) is located in the smoke collecting duct (110), the middle partition (150) is provided with a clearance groove extending in the up-down direction, the mounting structure (410) is passed through the clearance groove, and the first lifting drive (420) is connected to the smoke guide plate (300) through the mounting structure (410).

4. The downdraft range hood according to claim 3, characterized in that: The mounting structure (410) is provided with a mounting groove (411) along the up-down direction, and the lower end of the smoke guide plate (300) is embedded in the mounting groove (411).

5. The downdraft range hood according to claim 4, characterized in that: A light bar (500) is provided at the bottom of the mounting groove (411), the light bar (500) is located on the lower side of the smoke guide plate (300), the light emitting direction of the light bar (500) is arranged upward, and the smoke guide plate (300) is a light-transmitting glass piece.

6. The downdraft range hood according to claim 3, characterized in that: The first lifting driver (420) is installed on the middle partition plate (150) and covers the clearance slot.

7. The downdraft range hood according to claim 1, characterized in that: It also includes an air duct cover (600) and an opening and closing drive mechanism (700), wherein the air duct cover (600) is movably arranged on the machine base (100) and can open or close the air inlet (120), and the opening and closing drive mechanism (700) is arranged on the machine base (100) and is used to drive the air duct cover (600) to move.

8. The downdraft range hood according to claim 7, characterized in that: The air duct cover (600) is rotatably connected to the machine base (100) along a first axis, and the opening and closing drive mechanism (700) includes a second lifting drive, which is rotatably connected to the air duct cover (600) along a second axis, and the first axis and the second axis are arranged in parallel and spaced apart.

9. The downdraft range hood according to claim 1, characterized in that: It also includes a filter screen (800), which is arranged on the machine base (100) and located in the smoke collecting air duct (110), and the filter screen (800) is arranged at an angle.

10. The downdraft range hood according to claim 1, characterized in that: It also includes a lower support leg (900), which is arranged on the machine base (100) in an adjustable position along the up and down directions, and the lower part of the lower support leg (900) extends out of the machine base (100).

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