Range hood

Abstract

The invention belongs to the technical field of kitchen appliances, and discloses a range hood which comprises a wind shield, a sealing plate and a power assembly, the power assembly comprises a driving part, a first connecting rod mechanism and a second connecting rod mechanism, and the first connecting rod mechanism and the second connecting rod mechanism are both connected to the output end of the driving part; the wind shield has a closed state for blocking the air inlet and an open state for opening the air inlet, the sealing plate has a closed state for blocking the smoke inlet and an open state for opening the smoke inlet, the output end of the first connecting rod mechanism is connected to the wind shield, and the output end of the second connecting rod mechanism is connected to the sealing plate. The driving piece can drive the first connecting rod mechanism and the second connecting rod mechanism to act at the same time, so that the wind shield and the sealing plate are both converted into the open state from the closed state or converted into the closed state from the open state. According to the range hood, double sealing of the sealing plate and the wind shield is achieved through one driving piece, the power assembly is simple in structure, the occupied space is reduced, the production cost of the range hood is reduced, and reliable sealing is achieved.

Description

Technical Field

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

[0002] The range hood is a must-have in modern kitchens. Its function is to purify the oil smoke and discharge it to the outside, reducing the harm of oil smoke to the human body and the pollution to the indoor environment. The range hood collects the oil smoke generated by cooking through the smoke collecting hood. The oil smoke gathers in the smoke collecting chamber and is discharged through the air duct. In order to prevent the oil smoke in the public flue from flowing back into the smoke collecting chamber, the range hood generally has a check valve to prevent smoke backflow in the air duct. In addition, a baffle is also provided at the air collection port of the smoke collecting hood. When the range hood is turned off, the check valve and the baffle are both closed to block the oil smoke. The existing range hood generally uses a push rod motor to realize the movement or flipping of the baffle to open the air inlet; at the same time, in order to simplify the power system structure and save the internal space of the smoke collecting chamber, a mechanical check valve is used. The mechanical check valve relies on the deadweight of the valve plate or the tension of the spring to tighten the valve plate and close it with the valve body; however, the sealing performance of this check valve is poor. When the pressure inside the public flue changes, the valve plate is easy to loosen, and the oil smoke in the air duct is easy to flow back into the smoke collecting chamber. Summary of the invention

[0003] The object of the present invention is to provide a range hood which can solve the problem that the mechanical check valve used in the existing range hood has poor sealing performance and is prone to backflow of oil smoke due to loose valve plate.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] The smoke exhaust fan of the present invention is connected with the smoke exhaust fan of the present invention in an open position, and the smoke exhaust fan of the present invention is connected with the smoke exhaust fan of the present invention in an open position.

[0006] In one embodiment, the first linkage mechanism drives the wind shield to move out of the smoke collecting hood or retract into the smoke collecting chamber to form an open state; and / or the second linkage mechanism drives the sealing plate to rotate until the smoke inlet is at least partially unblocked to form an open state.

[0007] In one embodiment, the range hood has two sealing plates, the two sealing plates are arranged at an angle and one side is hinged to each other to form a hinge axis, the length of the hinge axis extends along the length direction of the smoke inlet, the other side of the sealing plate abuts the inner cavity wall of the smoke hood or the inner cavity wall of the main case, and the two sealing plates are respectively blocked on both sides of the width direction of the smoke inlet; the range hood has two groups of the second connecting rod mechanisms, the output ends of the two groups of the second connecting rod mechanisms are respectively connected to the two sealing plates, the second connecting rod mechanisms drive the sealing plates to rotate around the hinge axis to form a closed state or an open state, and the other side of the sealing plate in the open state is detached from the inner cavity wall of the smoke hood or the inner cavity wall of the main case.

[0008] In one embodiment, the range hood further includes a fan arranged in the smoke exhaust channel, and two air guide channels are respectively formed between the fan and the inner cavity walls on both sides of the main chassis. When the sealing plate is in an open state, the two sealing plates are respectively clamped on both sides of the fan to form a guide structure, and the oil smoke in the smoke collecting chamber enters the two air guide channels respectively through the guide structure.

[0009] In one embodiment, the hinge shaft is connected to the smoke hood or the main box, and when the sealing plate is in a closed state, one end of the sealing plate away from the hinge shaft abuts against the inner cavity wall of the main box; when the sealing plate is in an open state, the two sealing plates rotate relative to each other to form the guide structure, and one side edge of the two sealing plates away from the hinge shaft respectively abuts against the lower edges of the two side surfaces of the fan.

[0010] In one embodiment, when the sealing plate is in an open state, the angle between the two sealing plates is θ, the width of the sealing plate along the first direction is L, the thickness of the fan along the second direction is a, and sin(θ / 2)=a / 2L;

[0011] Wherein, the first direction is from the hinge shaft to a side edge of the sealing plate abutting against the fan, and the second direction is from the side edge of one of the sealing plates to the side edge of the other sealing plate.

[0012] In one of the embodiments, when the sealing plate is in a closed state, the angle between the two sealing plates is less than or equal to 80°, and the distance between one side edge of the sealing plate and the lower edge of the main chassis is d1, d1≥0.

[0013] In one embodiment, the driving member is arranged in the smoke collecting chamber, one end of the second connecting rod mechanism is hinged to the sealing plate, and the other end is hinged to the output end of the driving member, and the output end of the driving member is lifted and lowered relative to the hinge shaft so that the second connecting rod drives the sealing plate to rotate around the hinge shaft.

[0014] In one embodiment, the smoke hood includes two panels arranged opposite to each other, each of the panels is provided with the air inlet, the range hood has two wind shields and two groups of the first connecting rod mechanisms, the two wind shields correspond to the two air inlets respectively, the output ends of the two groups of the first connecting rod mechanisms are respectively connected to the two wind shields, the first connecting rod mechanisms are connected to the output end of the driving member, and the output end of the driving member can drive the two groups of the first connecting rod mechanisms to operate simultaneously.

[0015] In one embodiment, the driving member is arranged in the smoke collecting chamber, and the first connecting rod mechanism includes two first connecting rods and a third connecting rod hinged to each other, the end of the first connecting rod away from the third connecting rod is hinged to the output end of the driving member, the end of the third connecting rod away from the first connecting rod is connected to the wind shield, and the third connecting rod is reciprocatingly connected to the smoke collecting hood along its own length direction. The output end of the driving member is telescoped so that the first connecting rod drives the third connecting rod to move back and forth, and the third connecting rod drives the wind shield to move until it extends out of the smoke collecting hood to form an open state, and the third connecting rod drives the wind shield to move until it fits into the outer surface of the smoke collecting hood and blocks the air inlet to form a closed state.

[0016] In one embodiment, a first limit block is provided on the smoke hood, the first limit block has a first limit groove, the third connecting rod is reciprocatably arranged in the first limit groove, and the first limit groove is used to limit the movement of the third connecting rod along its own length direction.

[0017] Beneficial effects of the present invention:

[0018] The range hood provided by the present invention comprises a windshield, a sealing plate and a power assembly, the power assembly comprises a driving member, a first connecting rod mechanism and a second connecting rod mechanism, the first connecting rod mechanism and the second connecting rod mechanism are both connected to the output end of the driving member, the windshield has a closed state for blocking the air inlet and an open state for opening the air inlet, the sealing plate has a closed state for blocking the smoke inlet and an open state for opening the smoke inlet, when the windshield is in an open state, the oil smoke generated by cooking enters the smoke collecting chamber through the air inlet, when the range hood is turned off, the windshield is in a closed state; when the sealing plate is in an open state, the oil smoke in the smoke collecting chamber is discharged to the outside through the smoke exhaust channel, and when the sealing plate is in a closed state, it can prevent the oil smoke in the public flue from flowing back into the smoke collecting chamber. The output end of the first connecting rod mechanism is connected to the windshield, and the output end of the second connecting rod mechanism is connected to the sealing plate. The driving member can simultaneously drive the first connecting rod mechanism to move and the second connecting rod mechanism to move, so that the windshield and the sealing plate are both converted from a closed state to an open state, ensuring that the range hood can normally collect and discharge oil smoke when in use; or the windshield and the sealing plate are both converted from an open state to a closed state, ensuring that the indoor environment and the public flue are isolated. The sealing plate controlled to open and close by the driving member has good sealing performance, is not affected by changes in the surrounding pressure, and has a relatively reliable sealing. Even if the check valve of the range hood becomes loose due to pressure changes and leaks oil smoke, the closed state of the windshield and the sealing plate can still achieve the effect of preventing oil smoke from flowing back. Moreover, the sealing plate and the windshield are driven by the same driving member, the power component structure is simple and reduces the occupied space, and there is no need to set up an additional power structure for the sealing plate, thereby reducing the production cost of the range hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a range hood provided by an embodiment of the present invention when the wind shield plate and the sealing plate are in a closed state;

[0020] Figure 2 yes Figure 1 A schematic diagram of the enlarged local structure of part A;

[0021] Figure 3 It is a structural schematic diagram of a range hood provided by an embodiment of the present invention when the wind shield plate and the sealing plate are in an open state.

[0022] In the figure:

[0023] 1. Smoke hood; 11. Smoke collecting chamber; 12. Air inlet; 13. Panel; 14. First limit block; 15. Second limit block; 2. Main chassis; 21. Smoke exhaust channel; 211. Wind guide channel; 22. Fan; 3. Wind shield; 4. Sealing plate; 41. Articulated shaft; 5. Power assembly; 51. Driving member; 52. First connecting rod mechanism; 521. First connecting rod; 522. Third connecting rod; 53. Second connecting rod mechanism. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] 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 throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] like Figure 1 and Figure 2As shown, this embodiment provides a range hood, which includes a smoke hood 1 and a main box 2 connected to each other. The main box 2 is arranged above the smoke hood 1 to follow the flow direction of the oil smoke. The smoke hood 1 has a smoke collecting chamber 11, and the smoke hood 1 is provided with an air inlet 12 connected to the smoke collecting chamber 11. The oil smoke generated by cooking enters the smoke collecting chamber 11 through the air inlet 12. The main box 2 is connected at both ends and has a smoke exhaust channel 21 inside. The smoke exhaust channel 21 is connected to the smoke collecting chamber 11 through the smoke inlet of the main box 2, and the smoke exhaust port of the main box 2 is connected to the public flue (not shown in the figure).

[0029] The range hood also includes a windshield 3, a sealing plate 4 and a power assembly 5. The power assembly 5 includes a driving member 51, a first connecting rod mechanism 52 and a second connecting rod mechanism 53. The first connecting rod mechanism 52 and the second connecting rod mechanism 53 are both connected to the output end of the driving member 51. The windshield 3 has a closed state for blocking the air inlet 12 and an open state for opening the air inlet 12. The sealing plate 4 has a closed state for blocking the smoke inlet and an open state for opening the smoke inlet. When the windshield 3 is in an open state, the oil smoke generated by cooking enters the smoke collecting chamber 11 through the air inlet 12. When the range hood is turned off, the windshield 3 is in a closed state. When the sealing plate 4 is in an open state, the oil smoke in the smoke collecting chamber 11 is discharged to the outside through the smoke exhaust channel 21. When the sealing plate 4 is in a closed state, it can prevent the oil smoke in the public flue from flowing back into the smoke collecting chamber 11. The output end of the first link mechanism 52 is connected to the windshield 3, and the output end of the second link mechanism 53 is connected to the sealing plate 4. The driving member 51 can simultaneously drive the first link mechanism 52 and the second link mechanism 53 to move, so that the windshield 3 and the sealing plate 4 are both converted from a closed state to an open state, ensuring that the range hood can normally collect and discharge oil smoke when in use; or the windshield 3 and the sealing plate 4 are both converted from an open state to a closed state, ensuring that the indoor environment and the public flue are isolated. The sealing plate 4 controlled to open and close by the driving member 51 has good sealing performance, is not affected by the surrounding pressure changes, and has a relatively reliable seal. Even if the check valve (not shown in the figure) of the range hood is loosened due to pressure changes and leaks oil smoke, the closed state of the windshield 3 and the sealing plate 4 can still achieve the effect of preventing oil smoke from flowing back. Moreover, the sealing plate 4 and the windshield 3 are driven by the same driving member 51, the power assembly 5 has a simple structure and reduces the occupied space, and there is no need to set up an additional power structure for the sealing plate 4, thereby reducing the production cost of the range hood.

[0030] There are two ways for the wind shield 3 to block the air inlet 12. One is that the area of ​​the wind shield 3 and the air inlet 12 are the same, and the wind shield 3 is embedded in the air inlet 12 to form a blockage; the second is that the area of ​​the wind shield 3 is slightly larger than the air inlet 12, and the wind shield 3 fits the inner cavity wall or outer surface of the smoke hood 1, and the first connecting rod mechanism 52 drives the wind shield 3 to move to extend out of the smoke hood 1 or retract into the smoke collecting cavity 11 to form an open state. It can be understood that, for the arrangement mode in which the windshield 3 is attached to the inner wall of the smoke collecting hood 1, the first link mechanism 52 drives the windshield 3 to move to be retracted into the smoke collecting cavity 11 to form an open state; for the arrangement mode in which the windshield 3 is attached to the outer surface of the smoke collecting hood 1, the first link mechanism 52 drives the windshield 3 to move to extend outside the smoke collecting hood 1 to form an open state; of course, for the arrangement mode in which the windshield 3 is embedded in the air inlet 12 to form a blockage, the first link mechanism 52 drives the windshield 3 to move outward or retract. The specific selection can be made according to the user's needs.

[0031] When the sealing plate 4 is in the closed state, the smoke inlet is completely blocked, thereby isolating the smoke exhaust channel 21 and the smoke collecting chamber 11. The second connecting rod mechanism 53 drives the sealing plate 4 to rotate until the smoke inlet is at least partially unblocked to form an open state, and the smoke exhaust channel 21 and the smoke collecting chamber 11 are connected to ensure that the oil smoke in the smoke collecting chamber 11 can smoothly enter the smoke exhaust channel 21.

[0032] In this embodiment, the range hood has two sealing plates 4 to form a seal on the smoke inlet. The two sealing plates 4 are arranged at an angle and are hinged to each other on one side, and a hinge shaft 41 is formed at the hinge. The length of the hinge shaft 41 extends along the length direction of the smoke inlet, and the other side of the sealing plate 4 abuts against the inner cavity wall of the smoke hood 1 or the inner cavity wall of the main box 2 to seal the smoke inlet. The two sealing plates 4 block both sides of the smoke inlet along the width direction of the smoke inlet to form a seal. The range hood has two sets of second connecting rod mechanisms 53, and the output ends of the two sets of second connecting rod mechanisms 53 are respectively connected to the two sealing plates 4, and the second connecting rod mechanisms 53 drive the sealing plates 4 to rotate around the hinge shaft 41 to form a closed state or an open state. The other side of the sealing plate 4 in the open state is separated from the inner cavity wall of the smoke hood 1 or the inner cavity wall of the main box 2, so that a gap is formed between the edge of the sealing plate 4 on one side relative to the hinge shaft 41 and the inner cavity wall of the smoke hood 1 or the inner cavity wall of the main box 2, and the smoke inlet is not completely blocked but opened, and the smoke collecting chamber 11 and the smoke inlet are connected.

[0033] Figure 1 The X direction shows the width direction of the smoke inlet in this embodiment, and the length direction of the smoke inlet and the X direction are perpendicular to each other in the horizontal plane. Of course, in other embodiments, the X direction can also be used as the length direction of the smoke inlet, and in this case, the extension direction of the hinge shaft 41 can be adjusted.

[0034] It should be noted that the position of the hinge shaft 41 and the way in which the two sealing plates 4 block the smoke inlet in the sealed state can be arranged in various ways, which are not limited to the following embodiments. Figure 1 For example, in one embodiment, when the hinge shaft 41 is connected to the smoke collecting hood 1 and is disposed in the smoke collecting chamber 11, in the closed state, the edges of the two sealing plates 4 away from the hinge shaft 41 abut against the inner wall of the smoke collecting hood 1; when the state is switched, the two sealing plates 4 rotate toward the inside of the smoke collecting chamber 11 to form an open state, that is, in the attached Figure 1 From the perspective of , the sealing plate 4 on the left rotates counterclockwise, while the sealing plate 4 on the right rotates clockwise to separate from the inner wall of the smoke hood 1. In another embodiment, in the closed state, the edge of one side of the two sealing plates 4 away from the hinge shaft 41 abuts against the inner wall of the main case 2, and the hinge shaft 41 is connected to the main case 2 and is located above the two sealing plates 4; when the state is changed, the sealing plate 4 on the left rotates counterclockwise, while the sealing plate 4 on the right rotates clockwise to separate from the inner wall of the main case 2. For example, in another embodiment, Figure 1 As shown, in the closed state, the edge of one side of the two sealing plates 4 away from the hinge shaft 41 abuts against the inner wall of the main case 2, and the hinge shaft 41 is connected to the main case 2 and is located below the two sealing plates 4; when the state is switched, the sealing plate 4 on the left rotates clockwise, while the sealing plate 4 on the right rotates counterclockwise to separate from the inner wall of the main case 2. Figure 1 The middle arrow shows the rotation direction of the two sealing plates 4. The arrangement and rotation mode of the two sealing plates 4 can be selected according to the size and internal structure of the range hood, and is applicable to a wide range of working conditions.

[0035] The range hood also includes a fan 22 disposed in the smoke exhaust channel 21, and two air guide channels 211 are formed between the fan 22 and the inner cavity walls on both sides of the main chassis 2. When the sealing plate 4 is in an open state, the two sealing plates 4 rotate to be respectively clamped on both sides of the fan 22 to form an inverted triangle guide structure, and the oil smoke in the smoke collecting chamber 11 enters the two air guide channels 211 through the guide structure. In this way, although the sealing plate 4 in the open state is located in the smoke collecting chamber 11, it will not only not hinder the flow of oil smoke, but on the contrary, it has a guide effect, guiding the oil smoke in the smoke collecting chamber 11 into two paths, respectively entering the two air guide channels 211. On the one hand, the guide structure plays a guiding role, which can reduce turbulence in the flow of oil smoke, and on the other hand, it forms a cross-sectional change in the oil smoke flow path, accelerates the flow speed of oil smoke, and facilitates the oil smoke to flow quickly to the fan 22.

[0036] The hinge shaft 41 is connected to the smoke hood 1 or the main box 2. The sealing plate 4 only rotates during the state conversion process and does not move, so as to ensure the uniqueness and stability of the position of the sealing plate 4 in the closed state and the open state. In order to form the above-mentioned guide structure, the sealing plate 4 needs to be rotated until at least part of it is located in the smoke exhaust channel 21. Therefore, when the sealing plate 4 is in the open state, the side edge of the two sealing plates 4 away from the hinge shaft 41 abuts against the inner wall of the main box 2, such as Figure 1 As shown, when the state is changed, the two sealing plates 4 rotate relative to each other and move closer to each other to form a guide structure. In order to improve the smoothness of the oil smoke flowing through the sealing plates 4 during the guide, when the sealing plates 4 are in the open state, the side edges of the two sealing plates 4 away from the hinge shaft 41 respectively abut the lower edges of the two sides of the fan 22, and the sealing plates 4 will not extend above the lower edge of the fan 22. In this way, the sealing plates 4 will not block the fan 22 in the thickness direction of the fan 22, thereby ensuring the fluidity of the oil smoke. In this embodiment, the thickness of the fan 22 extends along the width direction of the smoke inlet.

[0037] In the open state, a triangular area is formed between the two sealing plates 4 and the fan 22. In order to ensure that the edges of the two sealing plates 4 away from the hinge shaft 41 abut against the lower edges of the two side surfaces of the fan 22, the sealing plates 4 will neither extend above the lower edge of the fan 22 nor form a gap with the fan 22, the following conditions need to be met: Figure 3 As shown, the angle between the two sealing plates 4 is θ, the width of the sealing plate 4 along the first direction is L, and the thickness of the fan 22 along the second direction is a, where sin(θ / 2)=a / 2L. The first direction is the direction from the hinge shaft 41 to the side edge of the sealing plate 4 abutting against the fan 22, and the second direction is the direction from the side edge of one sealing plate 4 to the side edge of the other sealing plate 4.

[0038] When the sealing plate 4 is in the closed state, the angle between the two sealing plates 4 is less than or equal to 180°, and the distance between one side edge of the sealing plate 4 and the lower edge of the main chassis 2 is d1. Figure 2 As shown, d1≥0, ensuring that the side edge of the sealing plate 4 overlaps the inner cavity wall of the main box 2, and the two sealing plates 4 in the closed state have good sealing performance.

[0039] For example, when the angle between the two sealing plates 4 is equal to 180°, the two sealing plates 4 in the closed state and the hinge shaft 41 are both located in the same horizontal plane. In this case, it is only necessary for the two sealing plates 4 and the hinge shaft 41 to be arranged in the smoke exhaust passage 21 and below the fan 22. When the angle between the two sealing plates 4 is less than 180°, the hinge shaft 41 can be located in the main box 2 or the smoke hood 1, and the specific calculation and setting can be performed according to the following formula. Figure 3As shown, the distance between the hinge shaft 41 and the fan 22 is D, the thickness of the fan 22 along the second direction is a, and the width of the sealing plate 4 along the first direction is L, wherein D 2 +(a / 2) 2 =L 2 It can be seen that when the size of the fan 22 and the size of the sealing plate 4 are determined, the position of the hinge shaft 41 can be set.

[0040] The driving member 51 is disposed in the smoke collecting chamber 11, and the driving member 51 adopts a push rod motor. The second connecting rod mechanism 53 adopts only one connecting rod member, one end of the second connecting rod mechanism 53 is hinged to the sealing plate 4, and the other end is hinged to the output end of the driving member 51. The output end of the driving member 51 is lifted and lowered relative to the hinge shaft 41 so that the second connecting rod mechanism 53 drives the sealing plate 4 to rotate around the hinge shaft 41. For example, in one embodiment, Figure 1 As shown, the angle between the two sealing plates 4 in the closed state is less than 180°, and the side edge of the two sealing plates 4 away from the hinge shaft 41 abuts against the inner cavity wall of the main box 2; when the state is switched, the push rod of the push rod motor rises, pushing the two sealing plates 4 to rotate in the direction of abutting against the fan 22 and forming an open state. Correspondingly, for the two sealing plates 4 in the open state, the push rod of the push rod motor descends, driving the two sealing plates 4 to rotate in the direction of abutting against the corresponding inner cavity wall of the main box 2 to form a closed state.

[0041] Of course, the rotation direction of the second link mechanism 53 and the movement direction of the push rod are only examples. In actual design, the rotation direction of the second link mechanism 53 and the movement direction of the push rod are not unique. For example, in one embodiment, when the two sealing plates 4 in the closed state are converted into the open state, the movement direction of the push rod of the push rod motor is downward. Specifically, it can be set according to the size of the angle between the two sealing plates 4, the relative position between the hinge shaft 41 and the sealing plate 4 and other parameters. This is not the focus of this application and will not be described in detail in this embodiment.

[0042] The smoke hood 1 includes two panels 13 arranged opposite to each other, each panel 13 is provided with an air inlet 12, and the range hood has two windshields 3 and two groups of first link mechanisms 52, and the two windshields 3 correspond to the two air inlets 12 respectively. The output ends of the two groups of first link mechanisms 52 are respectively connected to the two windshields 3, and the first link mechanisms 52 are connected to the output ends of the driving member 51, and the output end of the driving member 51 can drive the two groups of first link mechanisms 52 to move simultaneously, so as to control the movement of the two windshields 3 at the same time. For a range hood that requires two air inlets 12, the motion control structure of the two windshields 3 is simplified, and the motion control of the two windshields 3 and the two sealing plates 4 is realized by only one power source.

[0043] The panel 13 can be arranged vertically or obliquely to change the orientations of the two air inlets 12, meeting the requirements of different cooking environments. No specific limitation is made in this embodiment.

[0044] Specifically, the driving member 51 is arranged in the smoke collecting cavity 11. The first link mechanism 52 includes two first links 521 and a third link 522 that are hinged to each other. One end of the first link 521 away from the third link 522 is hinged to the output end of the driving member 51. One end of the third link 522 away from the first link 521 is connected to the wind deflector 3. The third link 522 is connected to the smoke collecting hood 1 so as to be reciprocally movable along its own length direction. The push rod of the driving member 51 expands and contracts to enable the first link 521 to drive the third link 522 to reciprocally move. The compound movement of rotation and translation of the first link 521 is converted into the linear movement of the third link 522 through the link structure, ensuring the uniqueness of the movement trajectory of the wind deflector 3 and preventing the wind deflector 3 from colliding with the smoke collecting hood 1 during the movement process.

[0045] In one embodiment, the third link 522 drives the wind deflector 3 to move out of the smoke collecting hood 1 to form an open state. In the open state, the wind deflector 3 is located outside the smoke collecting cavity 11, reducing the flow resistance to the oil fume. The third link 522 drives the wind deflector 3 to move to fit the outer surface of the smoke collecting hood 1 and block the air inlet 12 to form a closed state.

[0046] Exemplarily, in one embodiment, for the two wind deflectors 3 in the closed state, during the state conversion, the push rod of the push rod motor rises, and at the same time drives the two first links 521. The two first links 521 drive their respective corresponding third links 522 to move. The third link 522 pushes the wind deflector 3 to move towards the outside away from the smoke collecting hood 1 to open the air inlet 12. Figure 1 The arrow in the figure shows the movement direction of the push rod; correspondingly, for the two wind deflectors 3 in the open state, the push rod of the push rod motor descends, driving the two wind deflectors 3 to move towards the direction close to the smoke collecting hood 1 and block the air inlet 12 to form a closed state.

[0047] It should be noted that the movement direction of the push rod of the push rod motor, the extending direction of the third link 522, and the included angle between the third link 522 and the wind deflector 3 are not unique. As long as the angular position of the wind deflector 3 is consistent with the orientation of the air inlet 12, and the lifting direction of the push rod during the state conversion of the wind deflector 3 is consistent with the lifting direction of the push rod during the state conversion of the sealing plate 4, it is okay. In the drawings, the third link 522 is perpendicular to the wind deflector 3. In other embodiments, the included angle between the third link 522 and the wind deflector 3 can also be an acute angle or an obtuse angle.

[0048] In order to guide the movement of the third connecting rod 522, a first limit block 14 is provided in the smoke hood 1. The first limit block 14 has a first limit groove. The third connecting rod 522 is reciprocatably arranged in the first limit groove. The first limit groove is used to limit the movement of the third connecting rod 522 along its own length direction.

[0049] Similarly, in order to guide the lifting movement of the push rod, a second limit block 15 is also provided in the smoke hood 1. The second limit block 15 has a second limit groove. The push rod is reciprocatingly arranged in the second limit groove. The second limit groove is used to limit the movement of the push rod in the vertical direction.

[0050] Of course, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A range hood, comprising a smoke collecting hood (1) and a main housing (2) connected to each other, wherein the smoke collecting hood (1) has a smoke collecting chamber (11), the smoke collecting hood (1) is provided with an air inlet (12) connected to the smoke collecting chamber (11), the main housing (2) is connected at both ends and has a smoke exhaust passage (21) inside, the smoke exhaust passage (21) is connected to the smoke collecting chamber (11) through the smoke inlet of the main housing (2), and is characterized in that: The range hood further comprises a windshield (3), a sealing plate (4) and a power assembly (5); the power assembly (5) comprises a driving member (51), a first connecting rod mechanism (52) and a second connecting rod mechanism (53); the first connecting rod mechanism (52) and the second connecting rod mechanism (53) are both connected to the output end of the driving member (51); the windshield (3) has a closed state for blocking the air inlet (12) and an open state for opening the air inlet (12); the sealing plate (4) has a closed state for blocking the smoke inlet and an open state for opening the smoke inlet; the output end of the first connecting rod mechanism (52) is connected to the windshield (3); the output end of the second connecting rod mechanism (53) is connected to the sealing plate (4); the driving member (51) can simultaneously drive the first connecting rod mechanism (52) and the second connecting rod mechanism (53) to operate, so that the windshield (3) and the sealing plate (4) are both converted from a closed state to an open state, or from an open state to a closed state.

2. The range hood according to claim 1, characterized in that: The first connecting rod mechanism (52) drives the wind shield plate (3) to move to extend out of the smoke collecting hood (1) or retract into the smoke collecting chamber (11) to form an open state; and / or the second connecting rod mechanism (53) drives the sealing plate (4) to rotate until the smoke inlet is at least partially unblocked to form an open state.

3. The range hood according to claim 1, characterized in that: The range hood has two sealing plates (4), the two sealing plates (4) are arranged at an angle and are hinged on one side to form a hinge shaft (41), the length of the hinge shaft (41) extends along the length direction of the smoke inlet, the other side of the sealing plate (4) abuts against the inner cavity wall of the smoke hood (1) or the inner cavity wall of the main box (2), and the two sealing plates (4) are respectively blocked on both sides of the width direction of the smoke inlet; the range hood has two groups of the second connecting rod mechanisms (53), the output ends of the two groups of the second connecting rod mechanisms (53) are respectively connected to the two sealing plates (4), the second connecting rod mechanisms (53) drive the sealing plates (4) to rotate around the hinge shaft (41) to form a closed state or an open state, and the other side of the sealing plate (4) in the open state is separated from the inner cavity wall of the smoke hood (1) or the inner cavity wall of the main box (2).

4. The range hood according to claim 3, characterized in that: The range hood further comprises a fan (22) arranged in the smoke exhaust passage (21); two air guide passages (211) are respectively formed between the fan (22) and the inner cavity walls on both sides of the main housing (2); when the sealing plate (4) is in an open state, the two sealing plates (4) are respectively clamped on both sides of the fan (22) to form a guide structure; the smoke in the smoke collecting chamber (11) respectively enters the two air guide passages (211) through the guide structure.

5. The range hood according to claim 4, characterized in that: The hinge shaft (41) is connected to the smoke hood (1) or the main box (2); when the sealing plate (4) is in a closed state, one end of the sealing plate (4) away from the hinge shaft (41) abuts against the inner wall of the main box (2); when the sealing plate (4) is in an open state, the two sealing plates (4) rotate relative to each other to form the guide structure, and the side edges of the two sealing plates (4) away from the hinge shaft (41) respectively abut against the lower edges of the two side surfaces of the fan (22).

6. The range hood according to claim 5, characterized in that: When the sealing plate (4) is in an open state, the angle between the two sealing plates (4) is θ, the width of the sealing plate (4) along the first direction is L, the thickness of the fan (22) along the second direction is a, and sin(θ / 2)=a / 2L; The first direction is from the hinge shaft (41) to a side edge of the sealing plate (4) abutting against the fan (22), and the second direction is from the side edge of one of the sealing plates (4) to the side edge of the other sealing plate (4).

7. The range hood according to claim 5, characterized in that: When the sealing plate (4) is in a closed state, the angle between the two sealing plates (4) is less than or equal to 180°, and the distance between a side edge of the sealing plate (4) and the lower edge of the main chassis (2) is d1, and d1≥0.

8. The range hood according to claim 3, characterized in that: The driving member (51) is arranged in the smoke collecting chamber (11); one end of the second connecting rod mechanism (53) is hinged to the sealing plate (4), and the other end is hinged to the output end of the driving member (51); the output end of the driving member (51) is raised and lowered relative to the hinge shaft (41) so that the second connecting rod mechanism (53) drives the sealing plate (4) to rotate around the hinge shaft (41).

9. The range hood according to any one of claims 1 to 8, characterized in that: The smoke hood (1) comprises two panels (13) arranged opposite to each other, each of the panels (13) being provided with the air inlet (12), the range hood having two wind shields (3) and two groups of the first connecting rod mechanisms (52), the two wind shields (3) corresponding to the two air inlets (12) respectively, the output ends of the two groups of the first connecting rod mechanisms (52) being connected to the two wind shields (3) respectively, the first connecting rod mechanisms (52) being connected to the output end of the driving member (51), and the output end of the driving member (51) being capable of driving the two groups of the first connecting rod mechanisms (52) to operate simultaneously.

10. The range hood according to any one of claims 1 to 8, characterized in that: The driving member (51) is arranged in the smoke collecting chamber (11); the first connecting rod mechanism (52) comprises a first connecting rod (521) and a third connecting rod (522) which are hinged to each other; one end of the first connecting rod (521) away from the third connecting rod (522) is hinged to the output end of the driving member (51); one end of the third connecting rod (522) away from the first connecting rod (521) is connected to the wind shield (3); and the third connecting rod (522) is hinged along its length. The drive member (51) is reciprocatingly connected to the smoke hood (1), and the output end of the drive member (51) is extended and retracted so that the first connecting rod (521) drives the third connecting rod (522) to reciprocate, and the third connecting rod (522) drives the wind shield (3) to move to extend out of the smoke hood (1) to form an open state, and the third connecting rod (522) drives the wind shield (3) to move to fit the outer surface of the smoke hood (1) and block the air inlet (12) to form a closed state.

11. The range hood according to claim 10, characterized in that: The smoke hood (1) is provided with a first limit block (14), the first limit block (14) is provided with a first limit groove, the third connecting rod (522) is reciprocatingly arranged in the first limit groove, and the first limit groove is used to limit the movement of the third connecting rod (522) along its own length direction.

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