Range hood

Abstract

The application relates to an oil fume extractor, which comprises a casing, a first air inlet and a second air inlet are arranged on the front side wall of the casing in sequence from bottom to top, a smoke guide plate is rotationally connected to the first air inlet, a smoke baffle is rotationally connected to the second air inlet, a movement mechanism comprises a driving part, a clutch part, a first connecting rod assembly and a second connecting rod assembly, the power output end of the first connecting rod assembly is connected to the smoke guide plate, the power output end of the second connecting rod assembly is connected to the smoke baffle, the clutch part is configured to be selectively connected to at least one of the power input end of the first connecting rod assembly and the power input end of the first connecting rod assembly, so as to transmit the power of the driving part to the first connecting rod assembly to drive the smoke guide plate to move, transmit the power of the driving part to the second connecting rod assembly to drive the smoke baffle to move, or simultaneously transmit the power of the driving part to the first connecting rod assembly and the second connecting rod assembly to drive the smoke guide plate and the smoke baffle to move together.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood. Background Technology

[0002] A range hood is a kitchen appliance used to purify the kitchen environment. The air inlet of a range hood typically has a baffle plate that deflects forward and backward. To avoid interference with cookware on the stove, the baffle plate (acting as a smoke guide plate) may be deflected inward to open the air inlet, with another air inlet and baffle plate added above to accommodate different cooking conditions. For example, Chinese utility model patent application CN202321106324.4 (authorization announcement number: CN219693393U) discloses such a range hood structure.

[0003] However, the range hood in the aforementioned patent application still has some shortcomings. The smoke baffles at the first and second air inlets of the range hood are driven by two independent drive mechanisms, which involve a large number of parts, greatly occupy the space of the casing, and are prone to interference with other components inside the casing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a range hood that can drive the smoke baffle and smoke guide plate through a single drive mechanism, thereby reducing the space occupied inside the casing, in light of the current state of the prior art.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, comprising:

[0006] The casing has a first air inlet and a second air inlet on its front side wall, arranged sequentially from bottom to top.

[0007] The smoke guide plate is rotatably connected to the first air inlet of the housing, and can be deflected backward around the first axis extending to the left and right to open the first air inlet and deflected forward to close the first air inlet.

[0008] The smoke baffle is rotatably connected to the second air inlet of the housing, and can be deflected forward around the second axis extending to the left and right to open the second air inlet and deflected backward to close the second air inlet;

[0009] It also includes a motion mechanism, comprising a drive member, a clutch member, a first linkage assembly, and a second linkage assembly. The power output end of the first linkage assembly is connected to the smoke guide plate, the power output end of the second linkage assembly is connected to the smoke baffle, and the power output end of the drive member is connected to the clutch member. The clutch member is configured to selectively connect to at least one of the power input ends of the first linkage assembly and the second linkage assembly, thereby transmitting power from the drive member to the first linkage assembly to drive the smoke guide plate, or transmitting power from the drive member to the second linkage assembly to drive the smoke baffle, or transmitting power from the drive member to both the first and second linkage assemblies to drive the smoke guide plate and the smoke baffle together.

[0010] To simplify the structure of the clutch, the driving component includes a drive motor and a transmission shaft connected to the output shaft of the drive motor. The transmission shaft extends in the left-right direction. The clutch includes a support frame sleeved on the transmission shaft and capable of being rotated by the transmission shaft. The support frame has a first power arm and a second power arm. The first power arm is provided with a first electromagnetic pin that can extend and retract in the left-right direction. The second power arm is provided with a second electromagnetic pin that can extend and retract in the left-right direction. The power input end of the first linkage assembly has a first through hole through which the first electromagnetic pin can be inserted and disengaged. The power input end of the second linkage assembly has a second through hole through which the second electromagnetic pin can be inserted and disengaged.

[0011] As an improvement, the first connecting rod assembly includes a first connecting rod and a second connecting rod. The first end of the first connecting rod is sleeved on the drive shaft and can rotate around the drive shaft. The second end is rotatably connected to the first end of the second connecting rod. The second end of the second connecting rod is rotatably connected to the smoke guide plate. The first through hole is formed on the first connecting rod.

[0012] The second linkage assembly includes a third linkage and a fourth linkage. The first end of the third linkage is sleeved on the drive shaft and can rotate around the drive shaft. The second end is rotatably connected to the first end of the fourth linkage. The second end of the fourth linkage is rotatably connected to the smoke baffle. The second through hole is formed on the third linkage.

[0013] In order to achieve the rotatable connection between the smoke guide plate and the smoke baffle, the left and right sides of the smoke guide plate are rotatably connected to the second air inlet of the housing by first pins extending to the left and right near their bottom edges. The second end of the second connecting rod is connected to the back of the smoke guide plate near its top edge.

[0014] The left and right sides of the back of the smoke baffle are rotatably connected to the housing via rocker arms, and the second end of the fourth connecting rod is rotatably connected to the rocker arms.

[0015] To better adapt to different cooking conditions, the range hood has a first working state, a second working state, and a third working state as the positions of the first and second electromagnetic pins of the clutch change:

[0016] In the first working state, the first electromagnetic pin is inserted into the first through hole of the first connecting rod assembly, and the second electromagnetic pin is dislodged from the second through hole of the second connecting rod assembly;

[0017] In the second working state, the first electromagnetic pin is dislodged from the first through hole of the first connecting rod assembly, and the second electromagnetic pin is inserted into the second through hole of the second connecting rod assembly;

[0018] In the third working state, the first electromagnetic pin is inserted into the first through hole of the first connecting rod assembly, and the second electromagnetic pin is inserted into the second through hole of the second connecting rod assembly.

[0019] As an improvement, the front sidewall of the housing is inclined backward from top to bottom as a whole.

[0020] To ensure effective fume extraction and better adapt to different cooking conditions, the front sidewall of the casing includes a first sidewall and a second sidewall connected sequentially from bottom to top. The first air inlet is located on the first sidewall, and the second air inlet is located on the second sidewall. The angle formed by the first sidewall relative to the vertical plane is denoted as the first angle, and the angle formed by the second sidewall relative to the vertical plane is denoted as the second angle. The first angle is smaller than the second angle.

[0021] To ensure lighting effect, a light is also provided on the second side wall in the area above the second air inlet.

[0022] To prevent the smoke baffle from obstructing the lighting when it is open, the vertical projection of the lighting is located behind the vertical projection of the smoke baffle when the second air inlet is open.

[0023] As an improvement, it also includes a housing located above and connected to the housing, the housing containing a fan system.

[0024] Compared with the prior art, the advantages of the present invention are as follows: The drive mechanism of the range hood is driven by a clutch and engages with the first and second linkage assemblies. The clutch can be selectively connected to at least one of the power input terminals of the first linkage assembly. This allows the power of the drive component to be transmitted to the first linkage assembly to drive the smoke guide plate, or to the second linkage assembly to drive the smoke baffle, or to both the first and second linkage assemblies to drive the smoke guide plate and the smoke baffle together. In other words, the opening and closing of the smoke guide plate and the smoke baffle can be powered by the same drive component, reducing the number of drive mechanisms, avoiding excessive space occupation in the housing, and reducing interference with other components in the housing. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention (the smoke guide plate is in the open state and the smoke baffle is in the closed state);

[0026] Figure 2 This is a schematic diagram of the internal structure of a range hood according to an embodiment of the present invention;

[0027] Figure 3 This is a right view of the range hood according to an embodiment of the present invention (the right side panel of the housing and casing is omitted, the smoke guide plate is in the open state, and the smoke baffle is in the closed state);

[0028] Figure 4 This is a three-dimensional structural diagram of the internal structure of the range hood according to an embodiment of the present invention from another angle;

[0029] Figure 5 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention (the smoke guide plate is in the closed state, and the smoke baffle is in the open state);

[0030] Figure 6 This is a right view of the range hood according to an embodiment of the present invention (the right side panel of the housing and casing is omitted, the smoke guide plate is in the closed state, and the smoke baffle is in the open state);

[0031] Figure 7 This is a three-dimensional structural diagram of a range hood according to an embodiment of the present invention (the smoke guide plate is in the open state, and the smoke baffle is in the open state);

[0032] Figure 8 This is a right view of the range hood according to an embodiment of the present invention (the right side panel of the housing and casing is omitted, the smoke guide plate is in the open state, and the smoke baffle is in the open state). Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0035] Figures 1-8 A preferred embodiment of the range hood of the present invention is shown. The range hood includes a housing 11, a casing 12, and a centrifugal fan disposed within the housing 11. The inner cavity of the housing 11 is connected to the inner cavity of the casing 12. A first air inlet 1210 and a second air inlet 1220 are provided on the front side wall of the casing 12, allowing external fumes to enter the casing 12 through the first air inlet 1210 and the second air inlet 1220. The centrifugal fan, disposed within the housing 11, generates negative pressure during operation, drawing external fumes into the casing 12 through the corresponding air inlets. An oil cup, which is a long strip extending laterally, is provided at the bottom of the casing 12 to collect oil stains flowing down from the casing 12.

[0036] See Figure 1 and Figure 3 The front sidewall of the casing 12 slopes backward from top to bottom, specifically comprising a first sidewall 121 and a second sidewall 122 connected sequentially from bottom to top. The angle formed by the first sidewall 121 with respect to the vertical plane is denoted as the first angle, and the angle formed by the second sidewall 122 with respect to the vertical plane is denoted as the second angle, with the first angle being smaller than the second angle. A first air inlet 1210 is provided on the first sidewall 121, and a second air inlet 1220 is provided on the second sidewall 122, i.e., the second air inlet 1220 is located above and in front of the first air inlet 1210. An oil filter is also provided at the second air inlet 1220 for filtering oil fumes. The segmented structural design of the front sidewall of the casing 12 (with different slope angles) also minimizes the depth of the lower part of the casing 12, reducing the user's sense of spatial oppression and improving the user experience.

[0037] The left and right sides of the smoke guide plate 21 are rotatably connected to the first air inlet 1210 of the housing 12 near its bottom edge via first pins 46 extending to the left and right (the axis of the first pins 46 is the first pin). The smoke guide plate 21 can deflect forward to open the second air inlet 1220 and deflect backward to close the second air inlet 1220. The left and right sides of the back of the smoke baffle 22 are rotatably connected to the housing 12 via rocker arms 45. The rocker arms 45 are C-shaped, one end of which is rotatably connected to the housing 12 via pins extending to the left and right, and the other end is fixedly connected to the area near the top edge of the back of the smoke baffle 22.

[0038] A lighting lamp 23 is also provided on the second side wall 122 in the area above the second air inlet 1220. In order to avoid the smoke baffle 22 blocking the lighting lamp 23 when it is open, the vertical projection of the lighting lamp 23 is located behind the vertical projection of the smoke baffle 22 when the smoke baffle 22 is open and the second air inlet 1220 is open.

[0039] In this embodiment, the housing 12 is further provided with a motion mechanism located near its left or right side plate. The motion mechanism includes a drive component, a clutch component, a first linkage assembly, and a second linkage assembly.

[0040] The driving component includes a drive motor 31 and a transmission shaft 32 connected to the output shaft of the drive motor 31. The drive motor 31 is fixed relative to the left side plate of the housing 12. The transmission shaft 32 extends in the left and right direction and can be driven by the output shaft of the drive motor 31 to rotate around its own axis.

[0041] The clutch includes a support frame 33 that is sleeved and connected to the drive shaft 32 and can be rotated by the drive shaft 32. The support frame 33 has a first power arm 331 and a second power arm 332, both of which extend radially outward along the drive shaft 32. The first power arm 331 is provided with a first electromagnetic pin 3310 that can extend and retract in the left and right direction, and the second power arm 332 is provided with a second electromagnetic pin 3320 that can extend and retract in the left and right direction.

[0042] The first linkage assembly includes a first linkage 41 and a second linkage 42. The first end of the first linkage 41 is sleeved on the drive shaft 32 and can rotate around the drive shaft 32, while the second end is rotatably connected to the first end of the second linkage 42. The second end of the second linkage 42 is rotatably connected to the back of the smoke guide plate 21. The first linkage 41 has a first through hole 410 through which the first electromagnetic pin 3310 passes and is allowed to disengage. The second linkage assembly includes a third linkage 43 and a fourth linkage 44. The first end of the third linkage 43 is sleeved on the drive shaft 32 and can rotate around the drive shaft 32, while the second end is rotatably connected to the first end of the fourth linkage 44. The second end of the fourth linkage 44 is rotatably connected to the rocker arm 45 of the smoke baffle plate 22. The third linkage 43 has a second through hole 430 through which the first electromagnetic pin 3310 passes and is allowed to disengage. The working principle of the first electromagnetic ejector pin 3310 and the second electromagnetic ejector pin 3320 is based on the principle of electromagnetic induction. Their main function is to control the movement of the ejector pin through electromagnetic force. When the coil electromagnet is energized, a magnetic field is generated. This magnetic field attracts or repels the ferromagnetic material (such as an iron core) on the ejector pin, thereby causing the ejector pin to move accordingly. The specific mechanism and working process of the electromagnetic ejector pin are existing technologies and will not be described in detail here.

[0043] The range hood has a first working state, a second working state, and a third working state as the positions of the first electromagnetic pin 3310 and the second electromagnetic pin 3320 of the clutch change:

[0044] In the first working state, the first electromagnetic pin 3310 is inserted into the first through hole 410 of the first connecting rod assembly, and the second electromagnetic pin 3320 is disengaged from the second through hole 430 of the second connecting rod assembly. In this state, the motion mechanism only transmits power to the first connecting rod assembly, thereby driving the smoke guide plate 21 to open and close the first air inlet 1210. This mode is suitable for working conditions with low oil fume concentration, mainly for low-level absorption, such as steaming and cooking conditions. See details. Figure 1 .

[0045] In the second working state, the first electromagnetic pin 3310 disengages from the first through hole 410 of the first connecting rod assembly, and the second electromagnetic pin 3320 inserts into the second through hole 430 of the second connecting rod assembly. In this state, the motion mechanism only transmits power to the second connecting rod assembly, thereby driving the smoke baffle 22 to open and close the second air inlet 1220. This mode is suitable for working conditions with relatively high oil fume concentration and can achieve wide-area smoke collection, such as conventional steaming and stir-frying conditions. See details. Figure 2 .

[0046] In the third operating state, the first electromagnetic pin 3310 is inserted into the first through hole 410 of the first connecting rod assembly, and the second electromagnetic pin 3320 is inserted into the second through hole 430 of the second connecting rod assembly. In this state, the motion mechanism transmits power to both the first and second connecting rod assemblies simultaneously, thereby driving the smoke baffle 22 and the smoke guide 21 to move simultaneously. This mode is suitable for more vigorous cooking conditions, simultaneously achieving low-level smoke absorption and wide-area smoke collection, such as in the case of stir-frying with two burners. See details. Figure 7 .

[0047] In this embodiment, the drive mechanism of the range hood is driven by a clutch and engages with the first and second linkage assemblies. The clutch can be selectively connected to at least one of the power input terminals of the first linkage assembly. This allows the power of the drive component to be transmitted to the first linkage assembly to drive the smoke guide plate 21, to the second linkage assembly to drive the smoke baffle 22, or to both the first and second linkage assemblies to drive the smoke guide plate 21 and the smoke baffle 22 together. In other words, the opening and closing of the smoke guide plate 21 and the smoke baffle 22 can be powered by the same drive component, reducing the number of drive mechanisms, avoiding excessive space occupation within the housing 12, and reducing interference with other components within the housing 12.

Claims

1. A range hood, comprising: a housing (12) having a first air inlet (1210) and a second air inlet (1220) formed in a front side wall thereof, the first air inlet (1210) and the second air inlet (1220) being arranged in sequence from bottom to top; a smoke guide plate (21) rotatably connected to the housing (12) at the first air inlet (1210) and capable of being deflected rearward to open the first air inlet (1210) and being deflected forward to close the first air inlet (1210) about a first axis extending leftward and rightward; a smoke baffle (22) rotatably connected to the housing (12) at the second air inlet (1220) and capable of being deflected forward to open the second air inlet (1220) and being deflected rearward to close the second air inlet (1220) about a second axis extending leftward and rightward; characterized in that it further comprises a movement mechanism including a driving member, a clutch member, a first linkage assembly and a second linkage assembly, a power output end of the first linkage assembly being connected to the smoke guide plate (21), a power output end of the second linkage assembly being connected to the smoke baffle (22), a power output end of the driving member being connected to the clutch member, the clutch member being configured to be selectively connected to at least one of a power input end of the first linkage assembly and a power input end of the second linkage assembly to transmit power of the driving member to the first linkage assembly to drive the smoke guide plate (21) to act or to transmit power of the driving member to the second linkage assembly to drive the smoke baffle (22) to act or to simultaneously transmit power of the driving member to the first linkage assembly and the second linkage assembly to drive the smoke guide plate (21) and the smoke baffle (22) to act together; the driving member including a driving motor (31) and a transmission shaft (32) connected to an output shaft of the driving motor (31), the transmission shaft (32) extending in a leftward and rightward direction, the clutch member including a support frame (33) sleeved on the transmission shaft (32) and capable of being rotated by the transmission shaft (32), the support frame (33) having a first power arm (331) and a second power arm (332), the first power arm (331) being provided with a first electromagnetic ejector pin (3310) capable of moving in an extension and retraction manner in the leftward and rightward direction, the second power arm (332) being provided with a second electromagnetic ejector pin (3320) capable of moving in an extension and retraction manner in the leftward and rightward direction, the power input end of the first linkage assembly being provided with a first through hole (410) capable of allowing the first electromagnetic ejector pin (3310) to be inserted therein and to be ejected therefrom, the power input end of the second linkage assembly being provided with a second through hole (430) capable of allowing the second electromagnetic ejector pin (3320) to be inserted therein and to be ejected therefrom.

2. The hood according to claim 1, characterized in that: The first connecting rod assembly comprises a first connecting rod (41) and a second connecting rod (42), the first end of the first connecting rod (41) is sleeved on the transmission shaft (32) and can rotate around the transmission shaft (32), the second end is rotationally connected with the first end of the second connecting rod (42), the second end of the second connecting rod (42) is rotationally connected with the smoke guide plate (21), and the first through hole (410) is arranged on the first connecting rod (41); The second connecting rod assembly comprises a third connecting rod (43) and a fourth connecting rod (44), the first end of the third connecting rod (43) is sleeved on the transmission shaft (32) and can rotate around the transmission shaft (32), the second end is rotationally connected with the first end of the fourth connecting rod (44), the second end of the fourth connecting rod (44) is rotationally connected with the smoke blocking plate (22), and the second through hole (430) is arranged on the third connecting rod (43).

3. The hood according to claim 2, characterized in that: The left and right sides of the smoke guide plate (21) are rotationally connected to the second air inlet (1220) of the machine shell (12) at positions adjacent to the bottom edges of the left and right sides through first pins (46) extending leftward and rightward, and the second end of the second connecting rod (42) is connected to a position adjacent to the top edge of the back of the smoke guide plate (21); The back of the smoke blocking plate (22) is rotationally connected to the machine shell (12) through a rocker (45), and the second end of the fourth connecting rod (44) is rotationally connected to the rocker (45).

4. The hood according to claim 1, characterized in that: The range hood has a first working state, a second working state and a third working state with the change of the moving positions of the first electromagnetic ejector pin (3310) and the second electromagnetic ejector pin (3320) of the clutch: In the first working state, the first electromagnetic ejector pin (3310) is inserted into the first through hole (410) of the first connecting rod assembly, and the second electromagnetic ejector pin (3320) is withdrawn from the second through hole (430) of the second connecting rod assembly; In the second working state, the first electromagnetic ejector pin (3310) is withdrawn from the first through hole (410) of the first connecting rod assembly, and the second electromagnetic ejector pin (3320) is inserted into the second through hole (430) of the second connecting rod assembly; In the third working state, the first electromagnetic ejector pin (3310) is inserted into the first through hole (410) of the first connecting rod assembly, and the second electromagnetic ejector pin (3320) is inserted into the second through hole (430) of the second connecting rod assembly.

5. The hood according to any one of claims 1-4, characterized in that: The front side wall of the machine shell (12) is inclined rearward from top to bottom as a whole.

6. The hood according to claim 5, characterized in that: The front side wall of the machine shell (12) comprises a first side wall (121) and a second side wall (122) connected in sequence from bottom to top, the first air inlet (1210) is arranged on the first side wall (121), the second air inlet (1220) is arranged on the second side wall (122), the first side wall (121) forms a first included angle with a vertical plane, the second side wall (122) forms a second included angle with the vertical plane, and the first included angle is smaller than the second included angle.

7. The hood according to claim 6, characterized in that: The second side wall (122) is further provided with a lighting lamp (23) at a position above the second air inlet (1220).

8. The hood according to claim 7, characterized in that: In a state where the smoke baffle (22) opens the second air inlet (1220), a projection of the lighting lamp (23) in a vertical direction is located at a rear side of a projection of the smoke baffle (22) in the vertical direction.

9. The hood according to any one of claims 1-4, characterized in that: Further comprising a box (11) above the cabinet (12) and in communication with the cabinet (12), wherein the box (11) is provided with a fan system.

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