Range hood

Abstract

A range hood comprises: a box body, the front side wall of which is provided with a smoke inlet; the smoke baffle is arranged at the smoke inlet in a manner of rotating back and forth around an axis extending left and right; the magnetic body and the electromagnetic part are respectively and alternatively arranged on the smoke baffle and the front side wall of the box body and are oppositely arranged front and back; when the electromagnetic part is in a power-on state and current flows along a first direction, magnetism attracted with the magnetic body is generated, so that the smoke baffle is attracted on the front side wall of the box body to close the smoke inlet; when the electromagnetic part is in a power-on state and current flows in a second direction opposite to the first direction, magnetism repelling the magnetic body is generated, and therefore the smoke barrier has the trend of rotating forwards to open the smoke inlet. Compared with the prior art, the smoke barrier can be opened and closed stably.

Description

Technical Field

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

[0002] In order to improve the oil fume extraction effect, existing range hoods, especially close-suction range hoods, are provided with a smoke baffle at the smoke inlet. The installation structure of the smoke baffle is disclosed in the Chinese invention patent application "Smoke baffle drive system, smoke baffle drive method, range hood, storage medium" with application number 202310804283.4 and application publication number CN116734301A. The smoke baffle drive system is connected to the smoke baffle, including a motor; a transmission mechanism connected between the motor and the smoke baffle, which can convert the rotation of the motor into a swinging motion to drive the smoke baffle; the transmission mechanism can adopt various transmission structures in the prior art, such as a rotation transmission structure composed of multiple connecting rods. The motor works to drive the transmission mechanism to move, thereby driving the smoke baffle to open and close.

[0003] Existing smoke shields rely on motor drive to open or close, but some motors have insufficient torque, which may make it difficult to open the smoke shield after the smoke shield has been running for a long time. In addition, the motor shaft and the smoke shield are generally connected by a transmission structure such as a connecting rod. The design of the transmission structure has low power transmission efficiency and the smoke shield is not tightly closed when closed.

[0004] At the same time, the existing motor shaft and the transmission connecting rod are mostly fastened with screws. When the motor is stalled, the torque is large, which will produce a large pulling force on the connecting rod, which may cause the connecting rod to tear in severe cases. Moreover, the screws are subject to torque for a long time and there is a risk of loosening, which affects the service life of the range hood. Utility Model Content

[0005] The first technical problem to be solved by the utility model is to provide a range hood in view of the current status of the prior art, so that the smoke baffle can be stably opened and closed.

[0006] The second technical problem to be solved by the utility model is to provide a range hood to increase the service life.

[0007] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a range hood, comprising:

[0008] The box body has a smoke inlet on its front side wall;

[0009] A smoke baffle is disposed at the smoke inlet in a manner that allows it to rotate forward and backward around an axis extending left and right;

[0010] It is characterized by also including:

[0011] The magnetic body and the electromagnetic member are respectively arranged on the smoke baffle and the front side wall of the box body, and are arranged opposite to each other in front and behind.

[0012] When the electromagnetic element is powered on and the current flows in the first direction, it generates magnetism that attracts the magnetic body, so that the smoke baffle is attracted to the front side wall of the box body and closes the smoke inlet;

[0013] When the electromagnetic element is powered on and the current flows in a second direction opposite to the first direction, it generates magnetism that repels the magnetic body, thereby causing the smoke baffle to rotate forward and open the smoke inlet.

[0014] In this way, when the smoke inlet needs to be closed, the attractive force between the magnetic body and the electromagnetic component can close the smoke inlet tightly, reducing the gap between the smoke baffle and the front side wall of the box body; conversely, when the smoke inlet needs to be opened, the repulsive force between the magnetic body and the electromagnetic component can give the smoke baffle a forward rotation force to assist the smoke baffle to open, that is, the cooperation between the magnetic body and the electromagnetic component of the utility model can assist the opening and closing action of the smoke baffle, so that the smoke baffle can be opened and closed stably.

[0015] Preferably, the magnetic body is magnetic powder and is attached to the rear side of the smoke baffle;

[0016] The electromagnetic component is arranged on the front side wall of the box body.

[0017] Preferably, the electromagnetic component includes a coil, both ends of the coil are connected to a controller, and the controller is used to control the direction of the current output to the coil.

[0018] Preferably, the coil is arranged on the rear side of the front side wall of the box, and the extension direction of the coil is perpendicular to the front side wall of the box, and the front side wall of the box is arranged to be magnetically conductive.

[0019] Furthermore, the box body is provided with a fixing seat extending backward relative to the front side wall, and the coil is arranged in the fixing seat.

[0020] The existing smoke baffle is mostly driven by a motor and a transmission connecting rod connected to the motor shaft, and the existing motor shaft and the transmission connecting rod are mostly fastened with screws. When the motor is stalled, the torque is large, which will produce a large pulling force on the connecting rod, and in severe cases, the connecting rod may be torn. In addition, the screws are subject to torque for a long time and there is a risk of loosening, which affects the service life of the range hood. Therefore, in order to further solve the second technical problem mentioned above, preferably, it also includes:

[0021] The motor is fixed relative to the box body and has a rotating shaft, and the axial direction of the rotating shaft is referred to as a first axial direction;

[0022] a connecting rod connected to the smoke baffle;

[0023] The connecting rod is provided with a through hole through which the motor shaft passes, and the inner wall of the through hole and the side wall of the corresponding motor shaft are respectively provided with a first magnetic member and a second magnetic member that can be attracted together, so that the torque of the motor shaft can be transmitted to the connecting rod through the second magnetic member and the first magnetic member, so that the connecting rod rotates with the motor shaft to drive the smoke baffle to rotate;

[0024] Furthermore, when a rotation speed difference is generated between the motor shaft and the connecting rod, the first magnetic member is separated from the second magnetic member.

[0025] In this way, when the motor shaft rotates, the second magnetic part on the motor shaft rotates synchronously. Due to magnetic attraction, the second magnetic part drives the first magnetic part to rotate, and then drives the connecting rod to rotate, thereby driving the smoke shield to move; when the motor stalls, the first and second magnetic parts disengage, which will not cause excessive force on the connecting rod and can better protect the connecting rod.

[0026] Furthermore, the arrangement of the first and second magnetic parts in the utility model can better cooperate with the work between the magnetic body and the electromagnetic part. Furthermore, when the magnetic body and the electromagnetic part generate attraction or repulsion, the corresponding motor and the connection structure between the motor shaft and the connecting rod are less affected.

[0027] Preferably, the first magnetic member is a first magnet, the second magnetic member is a second magnet, the N pole of the first magnet is opposite to the S pole of the second magnet, or the S pole of the first magnet is opposite to the N pole of the second magnet.

[0028] Preferably, the first magnet and the second magnet are both bar magnets and extend along the first axial direction.

[0029] Furthermore, the inner wall of the through hole is provided with a first groove extending along the first axial direction and penetrating therethrough, so that the first magnet can be constrained therein; the side wall of the motor shaft is provided with a second groove extending along the first axial direction, so that the second magnet can be constrained therein. During installation, the connecting rod equipped with the first magnet can be sleeved on the outer periphery of the motor shaft equipped with the second magnet, which is convenient for operation.

[0030] Furthermore, the connecting rod includes a rod-shaped body and a connecting ring provided at one end of the rod-shaped body, the connecting ring extends along a first axial direction, and the extending direction intersects with the extending direction of the rod-shaped body, and the inner wall of the connecting ring defines the through hole.

[0031] Furthermore, the motor shaft and the through hole are arranged coaxially;

[0032] The inner diameter of the through hole is R1, and the outer diameter of the motor shaft is R2, and both satisfy 1mm≤R1-R2≤5mm.

[0033] Preferably, there are at least two first magnets, which are arranged at intervals along the circumferential direction, and the magnetic poles of two adjacent first magnets face in opposite directions;

[0034] The number of the second magnets is consistent with the number of the first magnets, and they are arranged corresponding to the respective first magnets, so that the overall structure is more reliable.

[0035] Compared with the prior art, the advantages of the present invention are: when the smoke inlet needs to be closed, the attractive force between the magnetic body and the electromagnetic component can close the smoke inlet tightly, reducing the gap between the smoke baffle and the front side wall of the box body; conversely, when the smoke inlet needs to be opened, the repulsive force between the magnetic body and the electromagnetic component can give the smoke baffle a forward rotation force to assist the smoke baffle to open, that is, the cooperation between the magnetic body and the electromagnetic component of the present invention can assist the opening and closing action of the smoke baffle, so that the smoke baffle can be opened and closed stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0037] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0038] Figure 3 for Figure 2 Enlarged view of the middle C part;

[0039] Figure 4 It is a schematic diagram of the connection structure between the motor and the connecting rod in the embodiment of the utility model;

[0040] Figure 5 It is a three-dimensional exploded view of the connection structure between the motor and the connecting rod in the embodiment of the utility model;

[0041] Figure 6 for Figure 5 Enlarged view of part A in the middle;

[0042] Figure 7 It is a cross-sectional view of the connection structure between the motor and the connecting rod in the embodiment of the utility model;

[0043] Figure 8 for Figure 7 Enlarged view of part B in the middle. DETAILED DESCRIPTION

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] like Figures 1 to 8 As shown in FIG. 1 , a preferred embodiment of a range hood of the present invention is shown. The range hood comprises a housing 6 , a smoke baffle 7 , a magnetic body, an electromagnetic member 8 and a connecting structure.

[0046] Among them, the front side wall of the box body 6 is provided with a smoke inlet 61, and the smoke baffle 7 is arranged at the smoke inlet 61 in a manner that it can rotate forward and backward around an axis extending left and right to open and close the smoke inlet 61. The above-mentioned magnetic body is magnetic powder, and is attached to the rear side 70 of the smoke baffle 7. The electromagnetic component 8 is arranged on the front side wall of the box body 6. When the electromagnetic component 8 is powered on and the current flows in a first direction, it generates magnetism that attracts the magnetic body, so that the smoke baffle 7 is attracted to the front side wall of the box body 6 and closes the smoke inlet 61; when the electromagnetic component 8 is powered on and the current flows in a second direction opposite to the first direction, it generates magnetism that repels the magnetic body, so that the smoke baffle 7 has a tendency to rotate forward and open the smoke inlet 61. In this embodiment, the electromagnetic component 8 includes a coil 80, and both ends of the coil 80 are connected to a controller, and the controller is used to control the direction of the current output to the coil 80. A fixing seat 81 extending backward relative to the front side wall is provided on the box body 6, and the coil 80 is arranged in the fixing seat 81, and the extension direction of the coil 80 is perpendicular to the front side wall of the box body 6, and the front side wall of the box body 6 is arranged to be magnetically conductive.

[0047] like Figures 4 to 8 As shown, the connection structure includes a motor 1, a connecting rod 2, a first magnetic component 3, a second magnetic component 4 and a sleeve 5.

[0048] The motor 1 has a rotating shaft 10, and the axial direction of the rotating shaft 10 is referred to as the first axial direction. The side wall of the motor rotating shaft 10 is provided with a second groove 11 extending along the first axial direction, and there are multiple second grooves (6 in this embodiment) and they are arranged at equal intervals along the circumference of the rotating shaft 10. The second magnetic member 4 is a bar-shaped second magnet extending along the first axial direction, the number of the second magnets is consistent with the number of the second grooves 11, and each second magnet is respectively embedded in its corresponding second groove 11, and the magnetic poles of two adjacent second magnets face opposite directions.

[0049] The connecting rod 2 is used to connect the smoke baffle 7 and the motor shaft 10, and is used to convert the rotational power of the motor shaft 10 into the rotation of the smoke baffle 7. Specifically, the connecting rod 2 includes a rod-shaped body 2a and a connecting ring 2b provided at one end of the rod-shaped body 2a, the other end of the rod-shaped body 2a is connected to the smoke baffle 7, the connecting ring 2b extends along the first axial direction, and the extension direction intersects with the extension direction of the rod-shaped body 2a, the inner wall of the connecting ring 2b defines a through hole 20 for the motor shaft 10 to pass through, and the motor shaft 10 and the through hole 20 are arranged coaxially; the inner diameter of the through hole 20 is R1, and the outer diameter of the motor shaft 10 is R2, and both satisfy 1mm≤R1-R2≤5mm (R1-R2 can be any value between 1 and 5mm, such as 1mm, 2mm, 3mm, 5mm, etc.). At the same time, the inner wall of the through hole 20 is provided with first grooves 21 extending and penetrating along the first axial direction corresponding to the positions of each second magnet, the number of the first grooves 21 is consistent with the number of the second magnets, and each first groove 21 is arranged at equal intervals along the circumferential direction of the inner wall of the through hole 20. The above-mentioned first magnetic member 3 is a bar-shaped first magnet extending along the first axial direction, the number of the first magnets is consistent with the number of the first grooves 21, and each first magnet is respectively embedded in the first groove 21 corresponding to each other, and the magnetic poles of two adjacent first magnets are opposite, and at the same time, each first magnet is attracted to the corresponding second magnet (that is, the N and S poles of the corresponding first and second magnets are opposite), so that the torque of the motor shaft 10 can be transmitted to the connecting rod 2 through the second magnetic member 4 and the first magnetic member 3, so that the connecting rod 2 rotates with the motor shaft 10. And when a rotation speed difference is generated between the motor shaft 10 and the connecting rod 2, the first magnetic member 3 is separated from the second magnetic member 4.

[0050] The shaft sleeve 5 is sleeved on the outer circumference of the motor shaft 10 to constrain the connecting rod 2 on the motor shaft 10 to prevent the connecting rod 2 from axially moving relative to the motor shaft 10 .

[0051] In this way, when the motor shaft 10 rotates, the second magnetic component 4 on the motor shaft 10 rotates synchronously. Due to magnetic attraction, the second magnetic component 4 drives the first magnetic component 3 to rotate, and then drives the connecting rod 2 to rotate, thereby driving the smoke baffle 7 to rotate; when the motor is stalled, the first and second magnetic components are disengaged, which will not cause excessive force on the connecting rod 2, can better protect the connecting rod 2 and increase its service life.

[0052] At the same time, in this embodiment, the direction of the current output to the coil 80 is controlled according to the forward and reverse rotation of the motor shaft 10, so that when the smoke shield closes the smoke inlet, the electromagnetic component 8 is attracted to the magnetic body on the smoke shield, and when the smoke shield is opened, the electromagnetic component 8 repels the magnetic body on the smoke shield.

[0053] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations 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.

Claims

1. A range hood, comprising: The box body (6) has a smoke inlet (61) on its front side wall; A smoke baffle (7) is disposed at the smoke inlet (61) in a manner that allows it to rotate forward and backward around an axis extending leftward and rightward; Features Also included are: The magnetic body and the electromagnetic member (8) are respectively arranged on the smoke baffle (7) and the front side wall of the box body (6), and are arranged opposite to each other in front and behind. The electromagnetic member (8) generates magnetism that attracts the magnetic body when the current is powered on and flows in a first direction, thereby causing the smoke baffle (7) to be attracted to the front side wall of the box body (6) and closing the smoke inlet (61); When the electromagnetic element (8) is powered on and current flows in a second direction opposite to the first direction, it generates magnetism that repels the magnetic body, thereby causing the smoke baffle (7) to tend to rotate forward and open the smoke inlet (61).

2. The range hood according to claim 1, Features: The magnetic body is magnetic powder and is attached to the rear side surface (70) of the smoke shield (7); The electromagnetic component (8) is arranged on the front side wall of the box body (6).

3. The range hood according to claim 2, Features: The electromagnetic component (8) comprises a coil (80), both ends of the coil (80) are connected to a controller, and the controller is used to control the direction of the current output to the coil (80).

4. The range hood according to claim 3, Features: The coil (80) is arranged on the rear side of the front side wall of the box body (6), and the extension direction of the coil (80) is perpendicular to the front side wall of the box body (6), and the front side wall of the box body (6) is arranged to be magnetically conductive.

5. The range hood according to claim 4, Features: The box body (6) is provided with a fixing seat (81) extending backward relative to the front side wall, and the coil (80) is arranged in the fixing seat (81).

6. The range hood according to any one of claims 1 to 5, Features: Also included are: The motor (1) is fixed relative to the housing (6) and has a rotating shaft (10), and the axial direction of the rotating shaft (10) is referred to as a first axial direction; A connecting rod (2) connected to the smoke baffle (7); The connecting rod (2) is provided with a through hole (20) through which the motor shaft (10) passes, and the inner wall of the through hole (20) and the corresponding side wall of the motor shaft (10) are respectively provided with a first magnetic component (3) and a second magnetic component (4) that can be attracted together, so that the torque of the motor shaft (10) can be transmitted to the connecting rod (2) through the second magnetic component (4) and the first magnetic component (3), so that the connecting rod (2) rotates with the motor shaft (10) and drives the smoke baffle (7) to rotate; Furthermore, when a rotation speed difference is generated between the motor shaft (10) and the connecting rod (2), the first magnetic member (3) is separated from the second magnetic member (4).

7. The range hood according to claim 6, Features: The first magnetic member (3) is a first magnet, the second magnetic member (4) is a second magnet, the N pole of the first magnet is opposite to the S pole of the second magnet, or the S pole of the first magnet is opposite to the N pole of the second magnet.

8. The range hood according to claim 7, Features: The first magnet and the second magnet are both bar magnets and extend along the first axial direction.

9. The range hood according to claim 8, Features: The inner wall of the through hole (20) is provided with a first groove (21) extending along a first axial direction and penetrating therethrough, so as to allow the first magnet to be constrained therein; The side wall of the motor shaft (10) is provided with a second groove (11) extending along the first axial direction for the second magnet to be constrained therein.

10. The range hood according to claim 9, Features: The connecting rod (2) comprises a rod-shaped body (2a) and a connecting ring (2b) arranged at one end of the rod-shaped body (2a); the connecting ring (2b) extends along a first axial direction, and the extending direction intersects with the extending direction of the rod-shaped body (2a); the inner wall of the connecting ring (2b) defines the through hole (20).

11. The range hood according to claim 9, Features: The motor shaft (10) and the through hole (20) are coaxially arranged; The inner diameter of the through hole (20) is R1, and the outer diameter of the motor shaft (10) is R2, and both satisfy 1mm≤R1-R2≤5mm.

12. The range hood according to claim 8, Features: There are at least two first magnets, which are arranged at intervals along the circumferential direction, and the magnetic poles of two adjacent first magnets are in opposite directions; The number of the second magnets is consistent with the number of the first magnets, and they are arranged corresponding to the respective first magnets.

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