A linked range hood

Abstract

The present invention discloses a linked range hood, comprising: an upper box assembly, which includes side panels extending along the front-to-rear direction of the range hood; an air inlet body, which can move relative to the upper box assembly; a smoke shield; and a movement mechanism, which includes a driving mechanism and a transmission mechanism, wherein the transmission mechanism includes a rod, the rod is hinged to the upper box assembly and fixed to the smoke shield, and the center of the hinge between the rod and the upper box assembly is a first hinge point; a second hinge point is provided at the rear top of the side panel, the transmission mechanism also includes at least two connecting rods hinged end to end between the rod and the second hinge point, one of the connecting rods is movably connected to the air inlet body, and the center of the hinge between the at least two connecting rods and the rod is a third hinge point, and the first hinge point is located at the front bottom of the upper box assembly, and the driving mechanism directly drives the air inlet body or drives the air inlet body through one of the connecting rods.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a linked 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 technical problem to be solved by the present invention is to address the deficiencies in the above-mentioned prior art and provide a linked range hood that can drive the air inlet body and the smoke shield to be linked by a power source, adapt to different movement forms of the air inlet body, and control the height of the upper box assembly at the same time.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a range hood comprising:

[0008] an upper box assembly comprising side panels extending in the front-to-rear direction of the range hood;

[0009] An air inlet body capable of moving relative to the upper box assembly;

[0010] smoke deflectors; and

[0011] The motion mechanism includes a driving mechanism and a transmission mechanism, wherein the transmission mechanism includes a rod, the rod is hinged to the upper box assembly and fixed to the smoke baffle, and the center of the hinge between the rod and the upper box assembly is a first hinge point;

[0012] Its characteristics are:

[0013] A second hinge point is provided at the top rear side of the side panel, and the transmission mechanism also includes at least two connecting rods hinged end to end between the rod and the second hinge point, one of the connecting rods is movably connected to the air inlet body, and the center of the hinge between the at least two connecting rods and the rod is the third hinge point, and the first hinge point is located at the bottom front side of the upper box assembly, and the driving mechanism directly drives the air inlet body or drives the air inlet body through one of the connecting rods.

[0014] By setting the above-mentioned rod, the air inlet body and the smoke shield can be linked relative to the upper box assembly, and the rod can facilitate high-precision control. Only through the connection of 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 one power source. It is particularly suitable for use in scenarios where the motion trajectory of the air inlet body is irregular, with a simple structure and low cost. In addition, for the movement of the smoke shield, the first hinge point is the fixed axis point and the third hinge point is the driving point. In order to reduce the load of the third hinge point under the condition of ensuring the movement torque of the smoke shield, the length between the first hinge point and the third hinge point needs to be as large as possible to meet the strength requirements of the driving structure of the heavier smoke shield. To this end, the distance between the second hinge point and the first hinge point should be as large as possible, thereby making full use of the cross-sectional range of the upper box assembly. On the basis that the upper box assembly meets the depth requirements of the cabinet, the height dimension of the cross-sectional area of ​​the upper box assembly can be minimized.

[0015] Preferably, the side panel has a rectangular vertical cross-section along the front-to-rear direction of the range hood, and the first hinge point and the second hinge point are approximately located on the diagonal line of the rectangle to maximize the length.

[0016] Furthermore, the front end of the air inlet body is hinged to the rod and the center of the hinge is a fourth hinge point, and the fourth hinge point is located between the third hinge point and the second hinge point, thereby reducing the movement amplitude of the air inlet body.

[0017] Preferably, the at least two connecting rods are a rocker and a first connecting rod, one end of the rocker is hinged to the side panel through a second hinge point, the first connecting rod is hinged to the rocker and the center of the hinge is the fifth hinge point, and the first connecting rod is hinged to the rod at a third hinge point.

[0018] By setting a first connecting rod between the rocker and the third hinge point, the motion trajectory of the first connecting rod can be conveniently controlled by controlling the length between the hinge points of each rod. After determining the motion trajectory of the first connecting rod, the air inlet body is kept at a motion amplitude close to that of the first connecting rod to obtain the required motion trajectory of the air inlet body.

[0019] Furthermore, a sixth hinge point is provided at the rear end of the air inlet body, and the air inlet body is hinged to the rocker or the first connecting rod via the sixth hinge point.

[0020] By further articulating 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.

[0021] Furthermore, the air inlet body is hinged to the rocker through a second connecting rod, and the center of the hinge is the seventh hinge point.

[0022] The movement amplitude of the first connecting rod is close to the movement amplitude of the air inlet body. The fourth hinge point is used to replace the first connecting rod to reduce the movement amplitude. The length between the hinge points at both ends of the second connecting rod and the length between the first hinge point and the third hinge point should be as equal as possible to ensure that the movement amplitudes of the first connecting rod and the air inlet body are close. Therefore, the seventh hinge point is chosen to be set on the rocker.

[0023] Furthermore, a connecting rod extending along the front-to-back direction of the range hood is fixed on the air inlet body, and the front end of the connecting rod is hinged to the rod member at a fourth hinge point.

[0024] The connection between the connecting rod and the rod member is used to reduce the amplitude of the air inlet body and play the role of bearing the air inlet body.

[0025] A preferred driving method is that the driving mechanism is an electric push rod: the upper end of the driving mechanism is hingedly mounted to the upper box assembly, and the output end of the lower end of the driving mechanism is hingedly connected to 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 extending horizontally along the front-to-back direction of the range hood, and the air inlet body is slidably engaged with the slide and can rotate relative to the slide.

[0026] Alternatively, the driving mechanism is an electric push rod or a motor, which is used to drive the rocker to rotate.

[0027] Furthermore, a decorative panel is provided at the front end of the bottom of the upper box assembly, a functional module is provided on the decorative panel, the first hinge point is located above the decorative panel, and the rod is a crank that passes by the rear side of the decorative panel.

[0028] The setting of the decorative panel facilitates the setting of the functional module, and the smoke damper bypasses the decorative panel through the crank to avoid interference with the decorative panel, thereby ensuring the normal movement of the smoke damper.

[0029] Furthermore, the smoke shield can be in an open state, at which time a smoke collecting cavity is formed between the smoke shield and the air inlet body, and the upper end of the smoke shield is located below the decorative panel and in front of the functional module.

[0030] 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. The decorative panel can also serve as a smoke shield to prevent oil smoke from escaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the range hood in the open state according to the first embodiment of the present invention;

[0032] 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;

[0033] Figure 3 A cross-sectional view of the range hood in an open state according to a first embodiment of the present invention;

[0034] 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);

[0035] 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;

[0036] Figure 6 This is a schematic diagram of the range hood in a closed state according to the first embodiment of the present invention;

[0037] Figure 7 is a cross-sectional view of the range hood in a closed state according to the first embodiment of the present invention;

[0038] Figure 8 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. DETAILED DESCRIPTION

[0039] 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.

[0040] 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. Example 1

[0041] See also Figures 1 to 7 A linked range hood includes an upper box assembly 1, an air inlet body 2, a smoke baffle 3 and an oil cup 4.

[0042] The upper housing assembly 1 includes an outer housing 11 and a fan frame 12 connected to the outer housing 11. The lower end of the fan frame 12 can be partially located within the outer housing 11, and the fan 6 is disposed within the fan frame 12. The upper housing assembly 1 can be installed in a kitchen cabinet. Since the width of the fan frame 12 generally needs to match the width of the fan 6, the fan frame 12 does not need to be large. However, the air inlet body 2 needs to be wider to accommodate a conventional household double burner. For these reasons, the upper housing assembly 1 is divided into the outer housing 11 and the fan frame 12. If optimization of air intake efficiency is not a consideration, an integrated upper housing assembly 1 can also be used.

[0043] The air inlet body 2 is movable relative to the upper housing assembly 1 and is formed with an air inlet 21, typically formed on the front face of the air inlet body 2. When the air inlet body 2 is in a first position, at least the front end of the air inlet body 2 is concealed within the upper housing assembly 1 and positioned below the fan. When the air inlet body 2 is in a second position, at least a portion of the air inlet body 2 is lower than the bottom of the upper housing assembly 1, allowing it to be exposed from the upper housing assembly 1. The "front face" of the air inlet body 2 referred to above refers to the side of the air inlet body 2 facing the user when in the second position. Alternatively, the air inlet body 2 may be a plate member that, when in the second position, is at least partially positioned below the upper housing assembly 1. This allows oil smoke to rise upward around the perimeter of the air inlet body 2 and enter the interior of the upper housing assembly 1 through an opening at the bottom of the upper housing assembly 1 (required to accommodate at least a portion of the air inlet body 2).

[0044] 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.

[0045] The oil cup 4 is arranged at the rear bottom of the air inlet body 2 .

[0046] 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 hinged to the upper housing assembly 1, and the lower end (output end) is directly hinged to the air inlet body 2, thereby driving the air inlet body 2 to rotate relative to the upper housing assembly 1. That is, it can move along the front-to-back direction of the range hood and rotate about an axis extending along the left-to-right direction of the range hood. Preferably, the output end of the drive mechanism 51 is hinged to the rear bottom of the air inlet body 2.

[0047] 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.

[0048] Each transmission mechanism includes a rod, one end of which is hinged to the upper box assembly 1. The center of the hinge between the rod and the upper box assembly 1 is denoted as the first hinge point D (a hinge point refers to any point on the axis of the hinge shaft used for hinge connection, the same below). To control the motion trajectory of the air inlet body 2, the upper box assembly 1 is provided with a second hinge point A. Each transmission mechanism also includes at least two connecting rods arranged between the second hinge point A and the rod, one of which is connected to the air inlet body 2. Multiple connecting rods are connected end to end and are connected in a hinged manner. The center of the hinge between at least two connecting rods and the rod is the third hinge point C.

[0049] The front end of the air inlet body 2 is also hinged to the rod, and the center of the hinge is marked as the fourth hinge point G. The first hinge point D is the rotation center of the fourth hinge point G, that is, the fourth hinge point G can rotate about the first hinge point D. The rod facilitates high-precision control. Simply by connecting the rod, the air inlet body 2 and the smoke deflector 3 can be linked and the motion trajectory can be highly precisely controlled. This is particularly suitable for applications where the motion trajectory of the air inlet body 2 is irregular, and it has a simple structure and low cost.

[0050] 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 for the entire transmission mechanism. One end of the rocker 526 is hinged 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 hinged connection is the second hinge 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 integrated into 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.

[0051] One end of the first connecting rod 521 is hinged to the end of the rocker 526 away from the second hinge point A, and the center of the hinge is denoted as the fifth hinge point B. The other end of the first connecting rod 521 is hinged to the crank 525, and the center of the hinge is the aforementioned third hinge point C. The motion trajectory of the first connecting rod 521 is preferably close to 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. The connection here can include a fixed connection and a movable connection, such as the first connecting rod 521 being fixed to the air inlet body 2, or the first connecting rod 521 being hinged to the air inlet body 2 through a connecting rod between the first connecting rod 521 and the air inlet body 2 and being slidably connected to the first connecting rod 521.

[0052] 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 hinged, 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.

[0053] In this embodiment, the first connecting rod 521 is connected to the air inlet body 2 through the crank 525, and the fourth hinge point G is located between the fifth hinge point C and the first hinge point D, and the three hinge points do not overlap. In this way, the air inlet body 2 and the smoke baffle 3 can 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 hinged 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 inside of the air inlet body 2 and extend out of the air inlet body 2.

[0054] To ensure a single degree of freedom for the air inlet body 2, a second connecting rod 523 is provided between the air inlet body 2 and the rocker 526. One end of the second connecting rod 523 is hinged to the air inlet body 2, with the center of the hinge being designated as the sixth hinge point F. The other end of the second connecting rod 523 is hinged to the rocker 526, with the center of the hinge being designated as the seventh hinge point E. The seventh hinge point E is located between the second hinge point A and the fifth hinge point B. Alternatively, the air inlet body 2 may be connected to a connecting rod located between the rocker 526 and the first hinge point D of the crank 525.

[0055] The rotation axes of the above-mentioned hinges all extend along the left and right directions of the range hood.

[0056] 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 first hinge point D may be located above the decorative panel 14, and there is a gap between the first hinge point D and the front end of the upper box assembly 1, that is, the first hinge 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 fourth hinge point G is located in front of the first hinge point D, and the front end of the air inlet body 2 is located above the decorative panel 14. The projections of the air inlet body 2 and the functional module 15 on the horizontal plane at least partially overlap, and the projection direction is shown in FIG. 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 fourth hinge point G is located on the rear side of the first hinge 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.

[0057] 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 cabinet assembly 1 when stored. Furthermore, due to the location of the first hinge 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 cabinet assembly 1, preventing oil smoke from leaking there due to the gap in the front-to-back direction between the smoke shield 3 and the front end of the upper cabinet assembly 1.

[0058] In this embodiment, in order to simplify the structure, the rotation center of the air inlet body 2 is directly located on the crank 525. Alternatively, connecting rods, cranks, rockers and other rods can be separately set to set the first hinge point D and the fourth hinge point G. In this case, the rods can be fixed to the crank 525.

[0059] The line connecting the fifth hinge point C and the first hinge point D is a first straight line CD. The angle α between the first straight line CD and the horizontal direction satisfies the following conditions: 20° < α ≤ 180°. This line must ensure that the fifth hinge point C and the first hinge point D are located on the same cross-section of the crank 525 along its thickness. The same applies to the following lines. The crank 525 moves within this range, meeting the required range of motion of the air inlet body 2.

[0060] In order to avoid the air inlet body 2 from having an excessive range of movement, so that the space required when it is stored is smaller and it does not occupy too much cooking space when opened, the range of movement 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 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 shutdown state to about 30°~90° with the vertical direction. The line between the second hinge point A and the fifth hinge point B is the second straight line AB, the line between the fifth hinge point B and the fifth hinge point C is the third straight line BC, and the line between the fifth hinge point C and the first hinge point D is the first straight line CD. The lengths of each line satisfy the following relationship: second straight line AB>third straight line BC>first straight line CD.

[0061] For the movement of the smoke damper 3, the first hinge point D serves as the fixed axis, and the fifth hinge point C serves as the driving point. To minimize the load on the fifth hinge point C while ensuring the movement torque of the smoke damper 3, the length of the first straight line CD needs to be as large as possible to meet the strength requirements of the driving structure of the heavier smoke damper 3. To this end, the distance between the second hinge point A and the first hinge point D should be as large as possible. Therefore, in this embodiment, the second hinge point A is located at the rear top of the side panel 13, while the first hinge 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 second hinge point A and the first hinge 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, and the cross-section of the side panel 13 (in both the vertical height and 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.

[0062] Because first straight line CD cannot be too short, that is, sufficient spacing must be maintained between fifth hinge point C and first hinge point D to ensure that first connecting rod 521 is strong enough to drive crank 525, which would result in excessive movement of air inlet 2 if first connecting rod 521 were directly connected to air inlet body 2, preventing it from adhering to the wall. Therefore, the aforementioned fourth hinge point G is provided. The line connecting fifth hinge point C and fourth hinge point G is fourth straight line CG, and the line connecting fourth hinge point G and first hinge point D is 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 air inlet body 2 to a smaller range.

[0063] The line connecting the second hinge point A and the seventh hinge point E is the sixth straight line AE, the line connecting the seventh hinge point E and the fifth hinge point B is the seventh straight line EB, and the line connecting the seventh hinge point E and the sixth hinge point F is the eighth straight line EF. As described above, the range of motion of the first connecting rod 521 closely represents the range of motion of the air inlet body 2. In this embodiment, the connecting rod 522 is used in place of the first connecting rod 521 to reduce the range of motion. The third straight line BC, the line connecting FG (the line connecting the fourth hinge point G and the sixth hinge point F), the first straight line CD, and the eighth straight line EF form a parallelogram. That is, the eighth straight line EF and the first straight line CD should be as equal in length as possible to ensure that the range of motion of the first connecting rod 521 and the connecting rod 522 (air inlet body 2) is 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 hinge 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 fourth hinge point G is limited, it is necessary to ensure the up and down range of the sixth hinge 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.

[0064] 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 (fourth hinge point G) also rotates about the first hinge point D, while the crank 525 rotates about a fixed axis about the first hinge 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 hinge point C and the fourth hinge point G are located behind the first hinge point D. When the smoke damper 3 is closed, the fifth hinge point C and the fourth hinge point G are located in front of the first hinge point D.

[0065] 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. Example 2

[0066] See also Figure 8In 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.

[0067] 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 to rotate, thereby driving the air inlet body 2 and the smoke baffle 3.

Claims

1. A linked range hood, comprising: An upper box assembly (1) comprising side panels (13) extending in the front-to-rear direction of the range hood; An air inlet body (2) capable of moving relative to the upper box assembly (1); Smoke deflector (3); and A motion mechanism comprising a driving mechanism (51) and a transmission mechanism, wherein the transmission mechanism comprises a crank (525), the crank (525) being hinged to the upper box assembly (1) and fixed to the smoke baffle (3), the center of the hinge between the crank (525) and the upper box assembly (1) being a first hinge point (D); Its characteristics are: A second hinge point (A) is provided at the top rear side of the side panel (13), and the transmission mechanism further comprises at least two connecting rods hinged end to end between the crank (525) and the second hinge point (A), one of the connecting rods being movably connected to the air inlet body (2), the center of the hinge between the at least two connecting rods and the crank (525) being the third hinge point (C), the first hinge point (D) being located at the bottom front side of the upper box assembly (1), the rotation axis of each hinge extending in the left-right direction of the range hood, and the driving mechanism (51) directly driving the air inlet body (2) or driving the air inlet body (2) through one of the connecting rods.

2. The linked range hood according to claim 1, characterized in that: The side plate (13) has a rectangular vertical cross-section along the front-to-back direction of the range hood.

3. The linked range hood according to claim 1, characterized in that: The front end of the air inlet body (2) is hinged to the crank (525), and the center of the hinge is a fourth hinge point (G), and the fourth hinge point (G) is located between the third hinge point (C) and the first hinge point (D).

4. The linked range hood according to claim 3, characterized in that: The at least two connecting rods are a rocker (526) and a first connecting rod (521), one end of the rocker (526) is hinged to the side plate (13) through a second hinge point (A), the first connecting rod (521) is hinged to the rocker (526) and the center of the hinge is a fifth hinge point (B), and the first connecting rod (521) is hinged to the crank (525) at a third hinge point (C).

5. The linked range hood according to claim 4, characterized in that: A sixth hinge point (F) is provided at the rear end of the air inlet body (2), and the air inlet body (2) is hinged to the rocker (526) or the first connecting rod (521) via the sixth hinge point (F).

6. The linked range hood according to claim 5, characterized in that: The air inlet body (2) is hinged to the rocker (526) via a second connecting rod (523), and the center of the hinge is a seventh hinge point (E).

7. The linked range hood according to claim 4, 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 hinged to the crank (525) at a fourth hinge point (G).

8. The linked range hood according to claim 3, characterized in that: The driving mechanism (51) is an electric push rod: the upper end of the driving mechanism (51) is hingedly mounted to the upper box assembly (1), and the output end of the lower end of the driving mechanism (51) is hingedly mounted to 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); Alternatively, the driving mechanism (51) is an electric push rod or a motor, which is used to drive the rocker (526) to rotate.

9. The linked range hood according to claim 1, characterized in that: A decorative panel (14) is provided at the front end of the bottom of the upper box assembly (1), a functional module (15) is provided on the decorative panel (14), the first hinge point (D) is located above the decorative panel (14), and the crank (525) is passed around the rear side of the decorative panel (14).

10. The linked range hood according to claim 9, characterized in that: The smoke baffle (3) can be in an open state, at which time a smoke collecting cavity (Q) is formed between the smoke baffle and the air inlet body (2), and the upper end of the smoke baffle (3) is located below the decorative plate (14) and in front of the functional module (15).

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