Range hood

Abstract

The range hood comprises an upper box body assembly, a lower box body assembly and a lower box body assembly, the air inlet body can move relative to the upper box body assembly and has a first state and a second state, when the air inlet body is in the first state, at least part of the air inlet body is contained in the upper box body assembly, and when the air inlet body is in the second state, at least part of the air inlet body is contained in the lower box body assembly. At least part of the air inlet body is lower than the bottom of the upper box body assembly and is exposed out of the upper box body assembly; the air inlet body is directly or indirectly connected with the upper box body assembly in a rotating mode, the center of the rotating connection position is marked as a first rotating connection point, and the first rotating connection point can rotate around a center point located in the upper box body assembly.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Chinese cooking produces a large amount of oil smoke. To maintain a clean kitchen environment and human health, range hoods have become an essential appliance in modern kitchens. As range hoods become increasingly popular, people are paying more and more attention to their effectiveness in extracting oil smoke. If the distance between the range hood's air inlet and the area where the oil smoke is generated is large, the oil smoke will be drawn in for a longer path and longer inhalation time, making it more likely for oil smoke to escape during cooking. Lowering the range hood's installation height, placing the air inlet as close to the smoke source as possible, and the negative pressure expanding downward, while beneficial for extracting oil smoke, will result in a smaller cooking space, making it easy for the cook's head to accidentally hit the hood. Furthermore, lowering the installation height also affects vision and the overall appearance of the kitchen.

[0003] To this end, a lifting range hood has been invented, that is, the air inlet body can be raised and lowered. When the range hood is turned on, the air inlet body descends, and when the range hood is turned off, the air inlet body ascends. For example, a range hood disclosed in Chinese patent application number 202310411677.3 includes a housing, a smoke collecting member, a smoke collecting plate, a transmission member, and a drive assembly. The housing has a first cavity inside, and a first mounting port connected to the first cavity is provided on the housing; the smoke collecting member is slidably mounted on the housing and extends or retracts into the first cavity through the first mounting port, and the smoke collecting member has an oil smoke inlet port; the drive assembly is mounted on the housing and connected to the smoke collecting member, and the smoke collecting plate is rotatably connected to a position of the housing near the first mounting port, and the transmission member is respectively connected to the smoke collecting plate and the smoke collecting member. In this type of range hood, the smoke collecting member makes a vertical lifting and lowering motion relative to the shell, so that the smoke collecting member needs a larger stroke when descending to expose the air inlet, squeezing the cooking space. When rising, it needs to occupy a larger space in the shell, resulting in an increase in the size of the entire machine. In addition, the vertical lifting of the smoke collecting member requires a slide rail to control the motion trajectory, which increases the cost. In addition, although the smoke collecting plate and the smoke collecting member of this range hood can be linked, since the smoke collecting member only makes a simple vertical lifting motion, the motion form and trajectory are simple and controllable, and the linkage is relatively simple. However, for range hoods with a slightly more complicated motion trajectory of the smoke collecting member, this linkage mechanism cannot be applied.

[0004] To this end, there is also a hidden range hood disclosed in Chinese patent application number 202310591483.6, which includes a range hood body, a flip shell, and a smoke collecting plate. The bottom of the range hood body has an opening. The flip shell rotates with the range hood body to allow the flip shell to flip into or out of the opening, forming a flue between the flip shell and the range hood body. The flip shell has a smoke inlet connected to the flue. The smoke collecting plate is movably connected to the flip shell to cover or release the smoke inlet and collect smoke below the smoke inlet. This type of range hood requires independent drive mechanisms for the flip shell and smoke collecting plate, resulting in a complex structure and high cost. In this type of range hood, the flip shell flips relative to the fixed axis of the range hood main body. Although this can compress the opening and closing stroke to a certain extent, reducing both the descent height and the storage space required for rising, but during the flipping and descending process and in the fully opened state, the rear side of the flip shell cannot fit into the wall of the range hood, causing oil smoke to escape here and even causing oil and oil liquid to drip on the rear side wall of the range hood; in addition, the flip shell and the smoke collecting plate of this range hood each require independent driving mechanisms to drive, resulting in a complex structure and high cost.

[0005] Therefore, there is room for further improvement. Summary of the Invention

[0006] The first technical problem to be solved by the present invention is to provide a range hood that can move against the wall and fully utilize the space in the upper box for storage in response to the deficiencies in the above-mentioned prior art.

[0007] The second technical problem to be solved by the present invention is to provide a range hood that addresses the deficiencies in the above-mentioned prior art and can drive the air inlet body and the smoke baffle to move in conjunction with each other using a power source and can adapt to different movement forms of the air inlet body.

[0008] The technical solution adopted by the present invention to solve the first technical problem is: a range hood comprising:

[0009] Upper box assembly;

[0010] an air inlet body, the air inlet body being movable relative to the upper box assembly and having a first state and a second state, wherein when the air inlet body is in the first state, the air inlet body is at least partially received in the upper box assembly, and when the air inlet body is in the second state, the air inlet body is at least partially lower than the bottom of the upper box assembly and exposed from the upper box assembly;

[0011] Its characteristics are:

[0012] The air inlet body is directly or indirectly connected to the upper box assembly for rotation, and the center of the rotation connection is recorded as a first rotation connection point, and the first rotation connection point can rotate around a center point located in the upper box assembly.

[0013] The air inlet body is connected to the upper box assembly through a rotating connection point, and the rotating connection point can rotate around a center point relative to the upper box assembly, so that the air inlet body can rotate non-fixed axis relative to the upper box assembly, and the motion trajectory is diversified, which can be beneficial for being set to remain close to the wall when moving downward to open, and the irregular motion trajectory of non-fixed axis rotation can be utilized when closing for storage, thereby relatively reducing the occupied space.

[0014] According to one aspect of the present invention, the first rotating connection point realizes rotation around the center point in such a manner that a guide groove with the center point as the center is formed in the upper box assembly, and the first rotating connection point can slide along the guide groove.

[0015] According to another aspect of the present invention, the first rotating connection point realizes rotation around the center point in that the range hood further includes a rod, one end of which is rotatably connected to the upper box assembly and the center of the rotating connection coincides with the center point, and the center point serves as the second rotating connection point.

[0016] The technical solution adopted by the present invention to solve the second technical problem is as follows: the range hood further includes a smoke baffle that can rotate relative to the upper box assembly, and the smoke baffle is directly or indirectly fixed to the rod.

[0017] By setting the above-mentioned rods, the air inlet body and the smoke shield can move relative to the upper box assembly. The rods can facilitate high-precision control. Only by connecting the rods, a power source can be used to achieve the linkage of the air inlet body and the smoke shield and high-precision control of the motion trajectory. It is particularly suitable for use in scenarios where the motion trajectory of the air inlet body is irregular. It has a simple structure and low cost.

[0018] The upper box assembly is further provided with a third rotation connection point, and at least two connecting rods connected in end-to-end rotation are connected between the rod and the third rotation connection point, and one of the connecting rods is movably connected to the air inlet body.

[0019] By setting a multi-link mechanism, the above box assembly is used as a frame and is movably connected to the air inlet body, so that the rotation of the air inlet body can be achieved.

[0020] Furthermore, the at least two connecting rods are a rocker and a first connecting rod, one end of the rocker is rotatably connected to the upper box assembly through a third rotation connection point, the first connecting rod is rotatably connected to the rocker and the center of the rotation connection is recorded as a fourth rotation connection point, the first connecting rod is rotatably connected to the rod and the center of the rotation connection is recorded as a fifth rotation connection point, and the first rotation connection point is located between the fifth rotation connection point and the second rotation connection point.

[0021] By arranging the rocker and the first connecting rod, under the cooperation of the rocker, the first connecting rod and the rod, the air inlet body and the smoke baffle can rotate in the same direction, thereby realizing opening and closing in the same direction.

[0022] Furthermore, the line between the third rotation connection point and the fourth rotation connection point is a first straight line, the line between the fourth rotation connection point and the fifth rotation connection point is a second straight line, and the line between the fifth rotation connection point and the second rotation connection point is a third straight line. The lengths of the lines satisfy the following relationship: first straight line > second straight line > third straight line.

[0023] This can prevent the air inlet body from having an excessive range of movement, so that the space required when it is stored is smaller and it will not occupy too much cooking space when it is opened. The range of movement of the smoke baffle should be much larger than the air inlet body, so that it can be closed at the bottom of the upper box assembly and form a larger smoke collection range when it is opened.

[0024] Furthermore, the line between the fifth rotation connection point and the first rotation connection point is the fourth straight line, the line between the first rotation connection point and the second rotation connection point is the fifth straight line, and the lengths of the lines satisfy the following relationship: fourth straight line > fifth straight line.

[0025] The length of the fourth straight line is greater than that of the fifth straight line, so that a sufficient distance can be maintained between the fifth rotation connection point and the second rotation connection point to ensure that the strength of the first connecting rod is sufficient to drive the rod, while reducing the movement amplitude of the air inlet body. Preferably, the rotation angle of the air inlet body does not exceed 40°.

[0026] Furthermore, a sixth rotation connection point is provided at the rear end of the air inlet body, and the air inlet body is rotationally connected to the rocker or the first connecting rod via the sixth rotation connection point.

[0027] By further rotating the air inlet body and the transmission mechanism, it is possible to ensure that the air inlet body has a unique degree of freedom of movement, so that the movement of the air inlet body can be controlled more accurately.

[0028] Furthermore, the air inlet body is rotationally connected to the rocker through a second connecting rod, and the center of the rotational connection is recorded as a seventh rotational connection point.

[0029] The movement amplitude of the first connecting rod is close to the movement amplitude of the air inlet body. The connecting rod is used to replace the first connecting rod to reduce the movement amplitude. In order to ensure that the movement amplitudes of the first connecting rod and the connecting rod (air inlet body) are close, and considering that the connecting rod has to bear the weight of the air inlet body, the length of the connecting rod must be close to the front and rear depth of the air inlet body. Therefore, the seventh rotation connection point is chosen to be set on the rocker.

[0030] Furthermore, the range hood further comprises a driving mechanism, which is connected to the air inlet body. The rod, the rocker and the first connecting rod are provided in two groups and correspond to the left and right sides of the air inlet body respectively.

[0031] Therefore, the driving mechanism acts on the air inlet body, and the rocker and rod of the transmission mechanism are connected to the air inlet body and the smoke deflector. This method makes the left and right synchronization of the smoke deflector better. Since the current rocker is too long and the synchronization is poor, it is easy to get stuck when extended. The smoke deflector reduces the difference in loads on both sides through its own gravity and structural symmetry, thereby ensuring the synchronization of the rocker and rod on both sides.

[0032] Furthermore, there is a gap between the center point and the front end of the upper box assembly.

[0033] Therefore, the space in front of the center point can be utilized so that the first rotating connection point can be moved to this position, thereby making this state the air inlet body storage state, thereby improving the space utilization rate when stored. It is also possible to provide cooperation with the smoke shield when setting the smoke shield to prevent the smoke shield from exceeding the front end of the upper box assembly, thereby preventing oil smoke from escaping.

[0034] Furthermore, the upper box assembly has a decorative panel located at the front end of the bottom, and the center point is located on the upper surface of the decorative panel. When the air inlet body is in the first state, the first rotating connection point is located in front of the center point, and the front end of the air inlet body is located above the decorative panel. When the air inlet body is in the second state, the first rotating connection point is located behind the center point, and the front end of the air inlet body is located behind the decorative panel.

[0035] By providing the decorative panel, it is convenient to use the decorative panel as a basis for setting the first rotation connection point, and it is also convenient to use the decorative panel as an installation basis for expanding the functions of the range hood.

[0036] Furthermore, a functional module is provided on the decorative panel, and when the air inlet body is in the first state, the projections of the air inlet body and the functional module on the horizontal plane at least partially overlap.

[0037] Functional modules are optional, such as lighting, cameras, various sensors, etc. By making the air inlet body and the functional modules share part of the space, the air inlet body can further make full use of the space in the upper box assembly for storage.

[0038] The range hood also includes a rod, one end of which is rotatably connected to the upper box assembly and the center of the rotational connection coincides with the center point, and the center point serves as a second rotational connection point. The range hood also includes a smoke baffle that can rotate relative to the upper box assembly, and the smoke baffle is directly or indirectly fixed to the rod.

[0039] By setting the above-mentioned rod, the air inlet body and the smoke shield can move relative to the upper box assembly. The rod can facilitate high-precision control. Only by connecting the rod, the linkage of the air inlet body and the smoke shield and high-precision control of the motion trajectory can be achieved using a single power source. It is particularly suitable for use in scenarios where the motion trajectory of the air inlet body is irregular. It has a simple structure and low cost. In addition, since the smoke shield rotates relative to the upper box assembly (also a non-fixed axis rotation), and the opening angle of the smoke shield usually needs to be greater than 90°, there is a gap between the center point (the second rotation connection point) and the front end of the upper box assembly, so that after the smoke shield is opened, its upper end can correspond to below this gap without exceeding the front end of the upper box assembly, thereby avoiding smoke leakage from the upper end of the smoke shield and the upper box assembly.

[0040] Furthermore, the rod is a crank, which is fixed to the smoke deflector. When the air inlet body is in the first state, the smoke deflector is located on the rear side of the decorative panel. When the air inlet body is in the second state, the smoke deflector is opened to form a smoke collecting cavity between the smoke deflector and the front side of the air inlet body. At this time, the upper end of the smoke deflector is located below the decorative panel and in front of the functional module.

[0041] The smoke shield is driven by a crank, so that the smoke shield avoids the decorative panel (functional module) during movement to avoid interference, and does not block the functional module when opened, so that the functional module can function normally.

[0042] A connecting rod extending along the front-to-back direction of the range hood is fixed on the air inlet body, and a front end portion of the connecting rod is rotatably connected to the rod member through a first rotation connection point.

[0043] Therefore, by providing the connecting rod, the connection between the air inlet body and the upper box assembly can be facilitated, and the extended length of the connecting rod can be used to maintain the stable operation of the air inlet body.

[0044] Furthermore, when the air inlet body is in the first state, the first rotation connection point is located in front of the center point, and when the air inlet body is in the second state, the first rotation connection point is located behind the center point.

[0045] Therefore, when the air inlet body is stored, it can partially enter the gap between the center point and the front end of the upper box assembly, making full use of the space of the upper box assembly for storage. When the air inlet body is opened, it can be swung backward to facilitate wall attachment.

[0046] Furthermore, the air inlet body is formed with an air inlet, and the position of the second rotation connection point when the air inlet body is in the first state is further forward than the position when the air inlet body is in the second state.

[0047] As a result, when the air inlet body moves downward to open, it also moves backward at the same time, so that it can remain close to the wall during the movement process and in the fully open state, preventing oil smoke from escaping through the gap between the air inlet body and the wall, and forming oil hanging and oil dripping; and under the same size (such as the front and rear dimensions of the front of the air inlet body), the air inlet body with a relatively fixed-axis flipping movement can have a larger air inlet area (the part located in front of the first rotating connection point in the closed state can also have an air inlet).

[0048] Furthermore, the preferred driving method of the air inlet body is that the range hood also includes a driving mechanism, and the driving mechanism is an electric push rod: the upper end of the driving mechanism is rotatably connected and installed with the upper box assembly, and the output end of the lower end of the driving mechanism is rotatably connected with the air inlet body; or, the upper end of the driving mechanism is fixed to the upper box assembly, and the output end of the lower end of the driving mechanism is provided with a slide groove extending horizontally along the front and rear direction of the range hood, and the air inlet body is slidably matched with the slide groove and can rotate relative to the slide groove.

[0049] Preferably, each rotational connection is a hinge, and each rotational connection point is a hinge point. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 This is a schematic diagram of the range hood in the open state according to the first embodiment of the present invention;

[0051] Figure 2 This is a schematic diagram of the range hood in the open state (viewed from the back to the front) according to the first embodiment of the present invention;

[0052] Figure 3 A cross-sectional view of the range hood in an open state according to a first embodiment of the present invention;

[0053] Figure 4 This is a cross-sectional view of the range hood in the open state of the first embodiment of the present invention (section and Figure 3 parallel);

[0054] Figure 5 Schematic diagram of the transmission mechanism of the movement mechanism of the range hood according to the first embodiment of the present invention;

[0055] Figure 6 This is a schematic diagram of the range hood in a closed state according to the first embodiment of the present invention;

[0056] Figure 7 is a cross-sectional view of the range hood in a closed state according to the first embodiment of the present invention;

[0057] Figure 8 This is a schematic diagram of the cooperation between the driving mechanism and the air inlet body of the range hood according to the second embodiment of the present invention;

[0058] Figure 9This is a cross-sectional view of a range hood according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0059] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0060] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration 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. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0061] Example 1

[0062] See also Figures 1 to 7 A range hood includes an upper box assembly 1, an air inlet body 2, a smoke baffle 3 and an oil cup 4.

[0063] The upper box assembly 1 includes an outer box 11 and a fan rack 12 connected to the outer box 11 . The lower end of the fan rack 12 may be partially located inside the outer box 11 . The fan 6 is arranged inside the fan rack 12 .

[0064] The upper box assembly 1 can be installed in a kitchen cabinet. Since the width of the fan frame 12 usually needs to be adapted to the width of the fan 6, the fan frame 12 does not need to be large. The air inlet body 2 needs to be adapted to a conventional household double burner, so it needs to be larger in width. Based on the above reasons, the upper box assembly 1 is divided into an outer box 11 and a fan frame 12. If the optimization of the air intake efficiency is not considered, an integrated upper box assembly 1 can also be used.

[0065] The air inlet body 2 is movable relative to the upper box assembly 1, and an air inlet 21 is formed on the front thereof. When the air inlet body 2 is in the first state, at least the front end of the air inlet body 2 is hidden and stored in the upper box assembly 1, and is located below the fan; when the air inlet body 2 is in the second state, the air inlet body 2 is at least partially lower than the upper box assembly 1 and exposed from the upper box assembly 1, and ensures that the air inlet 21 is lower than the bottom of the upper box assembly 1 and exposed from the upper box assembly 1. The "front" of the air inlet body 2 mentioned above refers to the side of the air inlet body 2 facing the user when it is in the second state. Alternatively, the air inlet body 2 can also be a plate, which is at least partially located below the upper box assembly 1 when it is in the second state, so that the oil smoke can rise upward around the periphery of the air inlet body 2 and enter the interior of the upper box assembly 1 from the opening at the bottom of the upper box assembly 1 (the opening is required to accommodate at least part of the air inlet body 2).

[0066] The smoke shield 3 is installed at the bottom of the upper box assembly 1 (outer box 11), which can be in an open state and a closed state. Figures 1 to 3 When the air inlet body 2 is in the second state, the smoke baffle 3 is in the open state, and a smoke collecting cavity Q is formed between the smoke baffle 3 and the front side of the air inlet body 2, so that the air inlet 21 is moved downward and the smoke collecting area is increased, thereby ensuring a better oil fume absorption effect in the working state; Figure 6 and Figure 7 When the air inlet body 2 is in the first state, the smoke baffle 3 is in the closed state. The smoke baffle 3 is enclosed at the bottom of the outer box body 11. It can be in a roughly horizontal extension state and can be flush with the bottom of the outer box body 11, achieving a completely flat closed state. At the same time, the air inlet 21 of the air inlet body 2 is closed, and the overall size of the machine is reduced to a minimum.

[0067] The oil cup 4 is arranged at the rear bottom of the air inlet body 2 .

[0068] The range hood also includes a motion mechanism, which includes a drive mechanism 51 and a transmission mechanism. In this embodiment, the drive mechanism 51 is an electric push rod, which is installed in the upper housing assembly 1, and the output end is transmission-connected to the air inlet body 2, thereby driving the air inlet body 2 to move. In this embodiment, the upper end of the drive mechanism 51 is rotationally connected to the upper housing assembly 1, and the lower end (output end) is directly rotationally connected to the air inlet body 2, thereby driving the air inlet body 2 to rotate relative to the upper housing assembly 1, that is, moving along the front-to-back direction of the range hood and rotating about an axis extending along the left-to-right direction of the range hood. Preferably, the output end of the drive mechanism 51 is rotationally connected to the rear bottom of the air inlet body 2.

[0069] Because the upper end of the drive mechanism 51 is mounted within the upper housing assembly 1, a short-stroke push rod mechanism can be employed. However, this installation arrangement places the drive mechanism 51 partially within the range hood's oil fume duct. To minimize its impact on range hood performance, the drive mechanism 51 is not isolated using separate components. To prevent oil fumes from impacting the reliability of the drive mechanism 51, the motor and push rod assembly of the drive mechanism 51 are sealed using a glue potting process. Furthermore, the output end of the drive mechanism 51 can pass through the rear side of the upper housing assembly 1 and connect to the air inlet 2 at the rear exterior of the air inlet 2, minimizing the impact of oil fumes on the drive mechanism 51.

[0070] The transmission mechanism controls the motion of the air inlet 2 and coordinates with the smoke deflector 3, thereby ensuring the coordinated movement of the air inlet 2 and smoke deflector 3 via a single power source (drive mechanism 51). To ensure stable left-right movement of the air inlet 2 and smoke deflector 3, two transmission mechanisms are located on the left and right sides of the upper housing assembly 1 (when the air inlet 2 is in the first state, a portion of the transmission mechanism is exposed). Each transmission mechanism connects the air inlet 2 to the smoke deflector 3.

[0071] Each transmission mechanism includes a rod, one end of which is rotationally connected to the upper box assembly 1, and the front end of the air inlet body 2 is also rotationally connected to the rod, and the center of the rotational connection is recorded as the first rotational connection point G (a rotational connection point refers to any point on the axis of the rotational connection shaft used for rotational connection, the same below), and the center of the rotational connection between the rod and the upper box assembly 1 is recorded as the second rotational connection point D, which is the rotation center of the first rotational connection point G, that is, the first rotational connection point G can rotate around the second rotational connection point D. The rod can facilitate high-precision control. Only by connecting the rod, the linkage of the air inlet body 2 and the smoke baffle 3 and high-precision control of the motion trajectory can be achieved. It is particularly suitable for use in scenarios where the motion trajectory of the air inlet body 2 is irregular. It has a simple structure and low cost.

[0072] In order to control the movement trajectory of the air inlet body 2, a third rotation connection point A is provided on the upper box assembly 1, and each transmission mechanism also includes at least two connecting rods arranged between the third rotation connection point A and the rod, and one of the connecting rods is connected to the air inlet body 2, and multiple connecting rods are connected end to end and are connected in a rotational connection manner.

[0073] In this embodiment, the at least two connecting rods are the first connecting rod 521 and the rocker 526 (the rocker 526 is also a connecting rod). The upper housing assembly 1 serves as the frame of the entire transmission mechanism. One end of the rocker 526 is pivotally connected to the side panel 13 of the upper housing assembly 1. The side panel 13 extends in the front-to-back direction of the range hood. The center of the pivotal connection is the third pivotal connection point A, which is preferably located at the rear top of the side panel 13. The side panels 13 are adapted to the transmission mechanism and also have two. They can be independent components or integral to the outer housing 11. The side panels 13 are located on the inner sides of the left and right side walls of the outer housing 11.

[0074] The rod is preferably a crank 525, one end of which is rotatably connected to the front bottom of the upper housing assembly 1, preferably in a rotatable manner, and the other end of the crank 525 is fixed to the smoke deflector 3. By making the rod a crank 525, the smoke deflector 3 can easily bypass fixed components (which will be described in detail below, namely the decorative panel and functional module) during movement.

[0075] One end of the first connecting rod 521 is rotationally connected to the end of the rocker 526 away from the third rotational connection point A. The center of the rotational connection is denoted as the fourth rotational connection point B. The other end of the first connecting rod 521 is rotationally connected to the crank 525. The center of the rotational connection is denoted as the fifth rotational connection point C. The motion trajectory of the first connecting rod 521 preferably approximates the motion trajectory of the air inlet body 2. The first connecting rod 521 can be directly or indirectly connected to the air inlet body 2. This connection may include a fixed connection or a movable connection, such as the first connecting rod 521 being fixed to the air inlet body 2, or a connecting rod between the first connecting rod 521 and the air inlet body 2 being rotationally connected to the air inlet body 2 and slidingly connected to the first connecting rod 521. In this embodiment, the first connecting rod 521 is connected to the air inlet body 2 via the crank 525. The first rotational connection point G is located between the fifth rotational connection point C and the second rotational connection point D, and the three rotational connection points do not overlap. This ensures that the air inlet body 2 and the smoke deflector 3 rotate in the same direction. To facilitate the connection between the air inlet body 2 and the crank 525, in this embodiment, it is achieved by a connecting rod 522 fixed to the air inlet body 2. The connecting rod 522 extends along the front and rear directions of the range hood, and can preferably be fixed to the bottom of the air inlet body 2. The front end of the connecting rod 522 is rotatably connected to the crank 525, and the rear end of the connecting rod 522 is close to the rear end of the air inlet body 2. The two connecting rods 522 can extend along the outside (left and right sides) of the air inlet 21 on the inner side of the air inlet body 2 and extend out of the air inlet body 2.

[0076] To ensure a single degree of freedom for the air inlet body 2, the aforementioned second connecting rod 523 is disposed between the air inlet body 2 and the rocker 526. One end of the second connecting rod 523 is rotationally connected to the air inlet body 2, with the center of the rotational connection being designated as the sixth rotational connection point F. The other end of the second connecting rod 523 is rotationally connected to the rocker 526, with the center of the rotational connection being designated as the seventh rotational connection point E. The seventh rotational connection point E is located between the third rotational connection point A and the fourth rotational connection point B. Alternatively, the air inlet body 2 may be connected to a connecting rod located between the rocker 526 and the second rotational connection point D of the crank 525.

[0077] The rotation axes of the above-mentioned rotating joints all extend along the left and right directions of the range hood.

[0078] Preferably, each of the above-mentioned rotational connections is a hinge, and the rotational connection point is a hinge point.

[0079] A decorative panel 14 is provided at the front end of the bottom of the upper box assembly 1, and a functional module 15 is provided on the decorative panel 14. The functional module 15 may be, for example, a lighting lamp extending along the left and right directions of the range hood, or may be, for example, a camera, an oil smoke sensor, etc. The second rotation connection point D may be located above the decorative panel 14, and there is a gap between the second rotation connection point D and the front end of the upper box assembly 1, that is, the second rotation connection point D is not at the frontmost side of the upper box assembly 1 as a whole. When the air inlet body 2 is in the first state, the first rotation connection point G is located in front of the second rotation connection point D, the front end of the air inlet body 2 is located above the decorative panel 14, and the projections of the air inlet body 2 and the functional module 15 on the horizontal plane at least partially overlap. See the projection direction for details. Figure 3 As shown by the arrow F in the figure, the smoke shield 3 is located on the rear side of the decorative panel 14 at this time; when the air inlet body 2 is in the second state, the first rotation connection point G is located on the rear side of the second rotation connection point D, and the front end of the air inlet body 2 is located on the rear side of the decorative panel 14. At this time, the upper end of the smoke shield 3 is located below the decorative panel 14 and in front of the functional module 15, and the upper end of the smoke shield 3 will not exceed the front end of the decorative panel 14 forward.

[0080] As a result, when the smoke shield 3 is open, it does not obstruct the functional module 15, ensuring that the functional module 15 can function normally. Furthermore, the smoke shield 3 can utilize the decorative panel 14 to serve as a smoke barrier, preventing oil smoke from escaping. The opening and storage of the air inlet 2 also fully utilizes the area of the decorative panel 14, further reducing the space occupied within the upper housing assembly 1 when stored. Furthermore, due to the location of the second pivoting connection point D, when the smoke shield 3 is open, its upper end can be positioned below the decorative panel 14 without protruding beyond the front end of the upper housing assembly 1, preventing oil smoke from leaking from this location due to the gap in the front-to-back direction between the smoke shield 3 and the front end of the upper housing assembly 1.

[0081] In order to avoid the air inlet body 2 from having an excessive range of motion, so that the space required when it is stored is small and it does not occupy too much cooking space when it is opened, the range of motion of the smoke baffle 3 should be much larger than the air inlet body 2, so that it can be closed at the bottom of the upper box assembly 1 and form a larger smoke-collecting range when it is opened. In this embodiment, the swing angle of the air inlet body 2 does not exceed 40°, and the smoke baffle 3 needs to be opened from the horizontal state of the off state to about 30° to 90° from the vertical direction. Therefore, the line between the third rotation connection point A and the fourth rotation connection point B is the first straight line AB (the line here needs to make the third rotation connection point A and the fourth rotation connection point B located on the same cross section of the rocker 526 along the thickness direction, and the following lines are defined in the same way), the line between the fourth rotation connection point B and the fifth rotation connection point C is the second straight line BC, and the line between the fifth rotation connection point C and the second rotation connection point D is the third straight line CD. The lengths of the lines satisfy the following relationship: first straight line AB> second straight line BC> third straight line CD.

[0082] As described above, the line connecting the fifth rotational connection point C and the second rotational connection point D is the third straight line CD. The angle α between the third straight line CD and the horizontal direction satisfies the following conditions: 20°<α≤180°. The crank 525 can move within this range to meet the required range of motion of the air inlet body 2.

[0083] For the movement of the smoke deflector 3, the second pivot point D serves as the fixed axis, and the fifth pivot point C serves as the driving point. To minimize the load on the fifth pivot point C while maintaining the required torque for the movement of the smoke deflector 3, the length of the third straight line CD needs to be as large as possible to meet the strength requirements of the drive structure for the heavier smoke deflector 3. To this end, the distance between the third pivot point A and the second pivot point D (i.e., the length of the first straight line AD) should be as large as possible. Therefore, in this embodiment, the third pivot point A is located at the rear top of the side panel 13, while the second pivot point D is located at the front bottom of the upper cabinet assembly 1. The cross-section of the side panel 13 (a vertical plane extending in the front-to-back direction) is rectangular, and the line connecting the third pivot point A and the second pivot point D approximates the diagonal of the cross-section of the side panel 13. This fully utilizes the cross-sectional area of the side panel 13, ensuring that its cross-section (both in the vertical direction and in the front-to-back depth) is consistent with the height of the outer cabinet 11. While the outer cabinet 11 meets the cabinet depth requirements, the height dimension of the outer cabinet 11 can be minimized.

[0084] Because the third straight line CD cannot be too short, that is, the fifth rotation connection point C and the second rotation connection point D must maintain sufficient spacing to ensure that the first connecting rod 521 is strong enough to drive the crank 525, which would result in the air inlet 2 moving too much if the first connecting rod 521 were directly connected to the air inlet 2, and would not be able to maintain contact with the wall. Therefore, the above-mentioned first rotation connection point G is provided. The line connecting the fifth rotation connection point C and the first rotation connection point G is the fourth straight line CG, and the line connecting the first rotation connection point G and the second rotation connection point D is the fifth straight line GD. The lengths of these lines satisfy the following relationship: fourth straight line CG > fifth straight line GD, thereby controlling the movement of the air inlet 2 within a smaller range.

[0085] The line connecting the third rotation connection point A and the seventh rotation connection point E is the sixth straight line AE, the line connecting the seventh rotation connection point E and the fourth rotation connection point B is the seventh straight line EB, and the line connecting the seventh rotation connection point E and the sixth rotation connection point F is the eighth straight line EF. As described above, the movement amplitude of the first connecting rod 521 closely represents the movement amplitude of the air inlet body 2. In this embodiment, the connecting rod 522 is used to replace the first connecting rod 521 to reduce the movement amplitude. The second straight line BC, FG (the line connecting the first rotation connection point G and the sixth rotation connection point F), the third straight line CD, and the eighth straight line EF form a parallelogram. That is, EF and CD should be as equal as possible in length to ensure that the movement amplitudes of the first connecting rod 521 and the connecting rod 522 (air inlet body 2) are similar. In addition, considering that the connecting rod 522 bears the weight of the air inlet body 2, the length of the connecting rod 522 should be close to the front-to-back depth of the air inlet body 2. Therefore, the seventh rotation connection point E is preferably located on the rocker 526. In order to meet the movement requirements of the connecting rod 522, when the movement range of the first rotating connection point G is limited, it is necessary to ensure the upper and lower range of the sixth rotating connection point F, and the length of each connecting line satisfies the following relationship: 2*seventh straight line EB<sixth straight line AE<4*seventh straight line EB, seventh straight line EB<eighth straight line EF<3*seventh straight line EB. Beyond this range, the movement range of the connecting rod 522 will be too large or too small.

[0086] Through the arrangement of the above-described motion mechanism, the air inlet body 2 can rotate (flip) about a non-fixed axis relative to the upper housing assembly 1. Its rotation center (first rotation connection point G) also rotates about the second rotation connection point D, while the crank 525 rotates about a fixed axis about the second rotation connection point D. This allows the smoke damper 3 to rotate (flip) about a non-fixed axis relative to the upper housing assembly 1. When the smoke damper 3 is open, the fifth rotation connection point C and the first rotation connection point G are located behind the second rotation connection point D. When the smoke damper 3 is closed, the fifth rotation connection point C and the first rotation connection point G are located in front of the second rotation connection point D.

[0087] During the movement of the air inlet body 2, the smoke baffle 3 and the movement mechanism, when the range hood is switched from the closed state (such as Figure 7 When the range hood is opened (as shown), the output end of the driving mechanism 51 extends downward, the air inlet body 2 tilts downward, the rocker 526 rotates backward, and the first connecting rod 521 rotates backward and downward, causing the air inlet body 2 to move backward and tilt downward. During the opening process, the air inlet body 2 remains in close contact with the wall surface on which the range hood is mounted. The first connecting rod 521 also pulls the crank 525 to tilt, causing the smoke baffle 3 to open. To close, the movement is reversed.

[0088] Example 2

[0089] See also Figure 8 In this embodiment, the difference from the above-mentioned embodiment 1 is that the upper end of the driving mechanism 51 is fixedly connected to the upper box assembly 1 when installed, and a slide groove 511 is formed on its lower end (output end) and extends horizontally along the front and rear direction of the range hood. The air inlet body 2 can slide with the slide groove 511 through a slider and can rotate relative to the slide groove 511.

[0090] Example 3

[0091] See also Figure 9 In this embodiment, the difference from the above-mentioned embodiment 1 is that a guide groove 16 is formed in the upper box assembly 1, which is in the shape of an arc, with the above-mentioned second rotation connection point D as the center point (i.e., the center of the circle), and the front end of the air inlet body 2 is rotationally connected to the upper box assembly 1 through the first rotation connection point G, and the first rotation connection point G can slide along the guide groove 16.

[0092] In the above embodiments, the driving mechanism 51 is connected to the air inlet body 2. Alternatively, the driving mechanism 51 may be a motor or an electric push rod to drive the rocker 526 or the crank 525 to rotate, thereby driving the air inlet body 2 and the smoke baffle 3.

Claims

1. A range hood comprising: Upper box assembly (1); An air inlet body (2), the air inlet body (2) being movable relative to the upper box assembly (1) and having a first state and a second state; when the air inlet body (2) is in the first state, the air inlet body (2) is at least partially received in the upper box assembly (1); and when the air inlet body (2) is in the second state, the air inlet body (2) is at least partially lower than the bottom of the upper box assembly (1) and exposed from the upper box assembly (1); Its characteristics are: The air inlet body (2) is directly or indirectly connected to the upper box assembly (1) for rotation, and the center of the rotation connection is recorded as a first rotation connection point (G). The first rotation connection point (G) can rotate around a center point (D) located in the upper box assembly (1).

2. The range hood according to claim 1, characterized in that: A guide groove (16) with the center point (D) as the center is formed in the upper box assembly (1), and the first rotating connection point (G) can slide along the guide groove (16).

3. The range hood according to claim 1, wherein: The range hood further comprises a rod, one end of which is rotatably connected to the upper box assembly (1), and the center of the rotatable connection coincides with the center point (D), and the center point (D) serves as a second rotatable connection point.

4. The range hood according to claim 3, characterized in that: The range hood further comprises a smoke baffle (3) which is rotatable relative to the upper box assembly (1); the smoke baffle (3) is directly or indirectly fixed to the rod.

5. The range hood according to claim 4, characterized in that: The upper box assembly (1) is also provided with a third rotation connection point (A), and at least two connecting rods are connected between the rod and the third rotation connection point (A) in an end-to-end rotational connection, one of which is movably connected to the air inlet body (2).

6. The range hood according to claim 5, characterized in that: The at least two connecting rods are a rocking rod (526) and a first connecting rod (521), one end of the rocking rod (526) is rotationally connected to the upper box assembly (1) through a third rotation connection point (A), the first connecting rod (521) is rotationally connected to the rocking rod (526), and the center of the rotation connection is recorded as a fourth rotation connection point (B), the first connecting rod (521) is rotationally connected to the rod member, and the center of the rotation connection is recorded as a fifth rotation connection point (C), and the first rotation connection point (G) is located between the fifth rotation connection point (C) and the second rotation connection point.

7. The range hood according to claim 6, characterized in that: The line connecting the third rotation connection point (A) and the fourth rotation connection point (B) is the first straight line (AB), the line connecting the fourth rotation connection point (B) and the fifth rotation connection point (C) is the second straight line (BC), and the line connecting the fifth rotation connection point (C) and the second rotation connection point is the third straight line (CD). The lengths of the lines satisfy the following relationship: first straight line (AB) > second straight line (BC) > third straight line (CD).

8. The range hood according to claim 6, characterized in that: The line connecting the fifth rotation connection point (C) and the first rotation connection point (G) is the fourth straight line (CG), and the line connecting the first rotation connection point (G) and the second rotation connection point is the fifth straight line (GD). The lengths of the lines satisfy the following relationship: the fourth straight line (CG) > the fifth straight line (GD).

9. The range hood according to claim 6, characterized in that: A sixth rotation connection point (F) is provided at the rear end of the air inlet body (2), and the air inlet body (2) is rotationally connected to the rocker (526) or the first connecting rod (521) via the sixth rotation connection point (F).

10. The range hood according to claim 9, characterized in that: The air inlet body (2) is rotationally connected to the rocker (526) via the second connecting rod (523), and the center of the rotational connection is recorded as the seventh rotational connection point (E).

11. The range hood according to claim 3, characterized in that: A connecting rod (522) extending along the front-to-back direction of the range hood is fixed to the air inlet body (2), and the front end of the connecting rod (522) is rotatably connected to the rod member via a first rotation connection point (G).

12. The range hood according to claim 5, characterized in that: The range hood further comprises a driving mechanism (51), the driving mechanism (51) being connected to the air inlet body (2), and the rod, rocker (526) and first connecting rod (521) being provided in two groups and corresponding to the left and right sides of the air inlet body (2) respectively.

13. The range hood according to claim 1, characterized in that: There is a gap between the center point (D) and the front end of the upper box assembly (1).

14. The range hood according to claim 13, wherein: The upper box assembly (1) has a decorative plate (14) located at the front end of the bottom, the center point (D) is located on the upper surface of the decorative plate (14), when the air inlet body (2) is in the first state, the first rotating connection point (G) is located in front of the center point (D), and the front end of the air inlet body (2) is located above the decorative plate (14), when the air inlet body (2) is in the second state, the first rotating connection point (G) is located behind the center point (D), and the front end of the air inlet body (2) is located behind the decorative plate (14).

15. The range hood according to claim 14, characterized in that: A functional module (15) is provided on the decorative panel (14); when the air inlet body (2) is in a first state, the projections of the air inlet body (2) and the functional module (15) on a horizontal plane at least partially overlap.

16. The range hood according to claim 15, characterized in that: The range hood further comprises a rod, one end of which is rotatably connected to the upper box assembly (1), and the center of the rotatable connection coincides with the center point (D), and the center point (D) serves as a second rotatable connection point. The range hood further comprises a smoke baffle (3) rotatable relative to the upper box assembly (1), and the smoke baffle (3) is directly or indirectly fixed to the rod.

17. The range hood according to claim 16, characterized in that: The rod is a crank (525), and the crank (525) is fixed to the smoke shield (3). When the air inlet body (2) is in a first state, the smoke shield (3) is located on the rear side of the decorative plate (14). When the air inlet body (2) is in a second state, the smoke shield (3) is opened to form a smoke collecting cavity (Q) between the smoke shield (3) and the front side of the air inlet body (2). At this time, the upper end of the smoke shield (3) is located below the decorative plate (14) and on the front side of the functional module (15).

18. The range hood according to claim 13, wherein: When the air inlet body (2) is in the first state, the first rotation connection point (G) is located in front of the center point (D); when the air inlet body (2) is in the second state, the first rotation connection point (G) is located in the rear of the center point (D).

19. The range hood according to claim 1, characterized in that: The air inlet body (2) is formed with an air inlet (21), and the position of the first rotation connection point (G) when the air inlet body (2) is in the first state is further forward than the position when the air inlet body (2) is in the second state.

20. The range hood according to claim 1, characterized in that: The range hood further comprises a driving mechanism (51), which is an electric push rod: the upper end of the driving mechanism (51) is rotatably connected and installed with the upper box assembly (1), and the output end of the lower end of the driving mechanism (51) is rotatably connected with the air inlet body (2); or, the upper end of the driving mechanism (51) is fixed to the upper box assembly (1), and the output end of the lower end of the driving mechanism (51) is provided with a slide groove (511) extending horizontally along the front-to-back direction of the range hood, and the air inlet body (2) is slidably matched with the slide groove (511) and can rotate relative to the slide groove (511).

21. The range hood according to any one of claims 1 to 20, characterized in that: Each rotation connection is a hinge, and each rotation connection point is a hinge point.

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