Smoke barrier movement mechanism, control method thereof and range hood

Abstract

The invention relates to a smoke barrier movement mechanism, a control method thereof and a range hood, which can solve the problem of insufficient self-locking force of the movement mechanism, so that the self-locking force can reach the strength limit of the movement mechanism. The smoke barrier movement mechanism comprises a smoke barrier body and a smoke barrier body, the hinge assembly comprises a hinge support used for being installed on the smoke collecting box and a transmission connecting rod which is rotatably arranged on the hinge support and fixedly connected with the smoke baffle body. The driving assembly is in driving connection with the transmission connecting rod and is used for driving the transmission connecting rod to rotate so as to drive the smoke barrier body to turn over; the limiting assembly comprises a limiting support installed on the hinge support, an electromagnet arranged on the limiting support, a check block arranged on the limiting support in a sliding mode and matched with the electromagnet, and a limiting pin arranged on the limiting support in a rotating mode and used for abutting against the transmission connecting rod.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a smoke baffle movement mechanism and a control method thereof, and a range hood. Background Art

[0002] With the improvement of people's quality of life, range hoods have become one of the indispensable kitchen appliances in modern families. They are usually installed above the kitchen stove and can absorb the fumes generated during the cooking process, thereby purifying the kitchen environment and improving people's comfort when cooking.

[0003] In order to expand the smoke trapping range, existing range hoods usually use a push rod motor to flip the smoke shield to expand the smoke trapping area, but the flipped smoke shield often encounters insufficient self-locking force of the motion mechanism. At present, there are generally two solutions to solve this problem: the first solution is to close the connecting rod hinge to the dead point when the smoke shield is in the open position to increase the self-locking force; the second solution is to redesign the push rod motor or the reduction motor to increase the self-locking force of the push rod or the reduction motor by increasing the reduction ratio.

[0004] However, the four-bar linkage and other motion hinge mechanisms in the first solution become more unstable as they get closer to the dead point and are prone to jamming or shaking. The second solution not only requires an increased development cycle, but also requires an increase in the speed of the internal drive motor in the push rod motor or reduction motor to ensure that the opening speed of the smoke baffle remains unchanged under large reduction ratios. This will cause greater motion noise, and the increase in speed will also lead to increased wear, resulting in a decrease in the life of the push rod motor or reduction motor. Summary of the invention

[0005] Existing solutions for enhancing the self-locking force of smoke baffles are either prone to getting stuck or increasing noise, causing wear and tear, and affecting service life; the present application provides a smoke baffle motion mechanism, a control method thereof, and a range hood, which can solve the problem of insufficient self-locking force of the motion mechanism, so that the self-locking force can reach the strength limit of the motion mechanism.

[0006] In order to achieve at least one of the above advantages or other advantages and purposes of the present invention, the present invention provides a smoke baffle movement mechanism, comprising:

[0007] Smoke shield body;

[0008] A hinge assembly, comprising a hinge bracket for mounting on the smoke collecting box and a transmission connecting rod rotatably disposed on the hinge bracket and fixedly connected to the smoke baffle body;

[0009] A driving assembly, drivingly connected to the transmission connecting rod, for driving the transmission connecting rod to rotate so as to drive the smoke baffle body to flip; and

[0010] The limit assembly includes a limit bracket installed on the hinge bracket, an electromagnet arranged on the limit bracket, a stopper slidably arranged on the limit bracket and cooperating with the electromagnet, and a limit pin rotatably arranged on the limit bracket and used to abut against the transmission connecting rod.

[0011] According to one embodiment of the present application, when the electromagnet is energized in the forward direction, the block is driven by the electromagnet to move toward the limit pin to prevent the limit pin from rotating, thereby maintaining the mechanical limit of the transmission link by the limit pin; when the electromagnet is energized in the reverse direction, the block slides away from the limit pin under the drive of the electromagnet to allow the limit pin to rotate, thereby contacting the limit pin to mechanically limit the transmission link.

[0012] According to one embodiment of the present application, the transmission connecting rod includes a transmission shaft drivingly connected to the driving assembly, a crank connecting rod fixedly connected to the transmission shaft and the smoke shield body at both ends respectively, and a limit block protruding from the crank connecting rod and cooperating with the limit pin.

[0013] According to one embodiment of the present application, the crank connecting rod has a first rod segment extending radially from the transmission shaft and a second rod segment extending circumferentially from the first rod segment and fixedly connected to the smoke baffle body; the limit block extends from the first rod segment in a direction away from the second rod segment.

[0014] According to one embodiment of the present application, the limit pin includes a rotating shaft connected to the limit bracket, a sleeve end portion sleeved on the rotating shaft and used to abut against the stop block, and a limit end portion extending from the sleeve end portion along the radial direction of the rotating shaft and used to abut against the limit block.

[0015] According to one embodiment of the present application, the rotating shaft is perpendicular to the transmission shaft.

[0016] According to one embodiment of the present application, the limit bracket includes a rear plate body fixedly connected to the hinge bracket, a pair of side plates extending forward from the rear plate body and plugged into the rotating shaft, and a bottom plate body extending forward from the rear plate body and located below the sleeve end; the rear plate body is provided with a through hole matching the stop block.

[0017] According to an embodiment of the present application, the bottom plate body is provided with a notch matching the limiting end portion so as to avoid the limiting end portion.

[0018] According to an embodiment of the present application, the limiting assembly further includes a reset member disposed between the limiting bracket and the limiting pin; the reset member is a spring whose two ends are respectively connected to the rear plate body and the sleeve end.

[0019] According to one embodiment of the present application, the driving assembly includes a push rod motor and a transmission handle; one end of the transmission handle is fixedly connected to the transmission shaft, and the other end of the transmission handle is rotatably connected to the push rod of the push rod motor.

[0020] According to another aspect of the present application, an embodiment of the present application further provides a range hood, comprising:

[0021] Fan box;

[0022] A smoke collecting box is arranged below the fan box and has a smoke inlet; and

[0023] Any of the above-mentioned smoke baffle movement mechanisms, wherein the smoke baffle movement mechanism is installed on the smoke collecting box and is used to open or close the smoke inlet.

[0024] According to another aspect of the present application, an embodiment of the present application further provides a method for controlling a smoke baffle movement mechanism, comprising the steps of:

[0025] When the range hood is turned on, the push rod motor and the electromagnet are synchronously controlled to be reversely energized, so that the transmission connecting rod is driven by the push rod motor to rotate forward to drive the smoke baffle body to open the smoke inlet, and the stopper slides away from the limit pin of the limit assembly under the action of the electromagnet; and

[0026] When the smoke baffle body is fully opened, the electromagnet is controlled to be energized in the forward direction, so that the block slides toward the limit pin under the action of the electromagnet to achieve self-locking.

[0027] According to an embodiment of the present application, when the smoke baffle body is fully opened, the step of controlling the electromagnet to be energized in the forward direction so that the block slides toward the limit pin under the action of the electromagnet to achieve self-locking includes the following steps:

[0028] When the smoke baffle body is fully opened, the push rod travel switch is triggered; and

[0029] After the push rod travel switch is triggered, the electromagnet is controlled to be energized in the forward direction, and the push rod motor is controlled to be de-energized after a predetermined delay.

[0030] According to one embodiment of the present application, the control method of the smoke baffle movement mechanism further includes the steps of:

[0031] When the range hood is turned off, determining whether the stopper is extended;

[0032] In response to the block being extended, the push rod motor is controlled to be energized in reverse direction, and the real-time reverse current of the push rod motor is detected;

[0033] Determine whether the real-time reverse current is less than the preset current: if so, continue to increase the current of the push rod motor; if not, control the electromagnet to be energized in the reverse direction so that the block slides away from the limit pin; and

[0034] In response to the block not extending out, the push rod motor is controlled to be energized in the forward direction, so that the transmission connecting rod is driven by the push rod motor to rotate in the reverse direction to drive the smoke baffle body to close the smoke inlet.

[0035] According to an embodiment of the present application, in response to the block not extending, the step of controlling the push rod motor to be energized in the forward direction so that the transmission connecting rod rotates in the reverse direction under the drive of the push rod motor to drive the smoke baffle body to close the smoke inlet includes the steps of:

[0036] Detecting the real-time forward current of the push rod motor; and

[0037] Determine whether the real-time forward current is less than the stall current: if so, control the push rod motor to continue to be energized in the forward direction; if not, control the push rod motor to be de-energized.

[0038] In summary, on the one hand, when the range hood is turned on to perform the fume extraction operation, the transmission connecting rod rotates forwardly under the drive of the driving assembly to drive the smoke baffle body to flip and open the smoke inlet. At this time, the electromagnet can be energized in the forward direction to drive the block to slide toward the limit pin to block the limit pin from rotating, so that the limit pin can mechanically limit the transmission connecting rod to ensure the stable self-locking of the smoke baffle movement mechanism. In theory, the self-locking force can reach the strength limit of the movement mechanism. On the other hand, when the range hood is turned off after completing the fume extraction operation, the electromagnet can be energized in the reverse direction to drive the block to slide away from the limit pin and allow the limit pin to rotate, so that the limit pin can release the mechanical limit on the transmission connecting rod to unlock the smoke baffle movement mechanism, ensuring that the transmission connecting rod can rotate in the reverse direction under the drive of the driving assembly to drive the smoke baffle body to flip and close the smoke inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a three-dimensional schematic diagram of a range hood according to an embodiment of the present invention;

[0040] Figure 2 A schematic structural diagram of a smoke baffle movement mechanism in a range hood according to the above embodiment of the present application is shown;

[0041] Figure 3 Shows Figure 2 An enlarged schematic diagram of a part A in the movement mechanism of the smoke baffle shown;

[0042] Figure 4 Shows Figure 2 A schematic cross-sectional view of a smoke baffle movement mechanism shown;

[0043] Figure 5 A three-dimensional schematic diagram of a restriction component in a smoke baffle movement mechanism according to the above embodiment of the present application is shown;

[0044] Figure 6 A schematic diagram showing the state of the limiting assembly according to the above embodiment of the present application when the mechanism is self-locking;

[0045] Figure 7 A schematic diagram showing the state of the restriction assembly according to the above embodiment of the present application when the mechanism is unlocked;

[0046] Figure 8 is a flow chart of a method for controlling a smoke baffle movement mechanism according to an embodiment of the present application;

[0047] Fig. 9 A schematic flow chart of the control steps when the smoke baffle body is opened in the control method of the smoke baffle movement mechanism according to the above embodiment of the present application is shown;

[0048] Fig.10 A schematic flow chart of the control steps when the smoke baffle body is closed in the control method of the smoke baffle movement mechanism according to the above embodiment of the present application is shown;

[0049] Fig.11 An example of a control method for the smoke baffle movement mechanism according to the above embodiment of the present application is shown.

[0050] Description of main component symbols:

[0051] 1. Smoke baffle movement mechanism; 10. Smoke baffle body; 20. Hinge assembly; 21. Hinge bracket; 22. Transmission connecting rod; 221. Transmission shaft; 222. Crank connecting rod; 2221. First rod section; 2222. Second rod section; 223. Limit block; 30. Drive assembly; 31. Push rod motor; 32. Transmission handle; 40. Limit assembly; 41. Limit bracket; 411. Rear plate; 4110. Through hole; 412. Side plate; 413. Bottom plate; 4130. Notch; 42. Electromagnet; 43. Block; 44. Limit pin; 441. Rotating shaft; 442. Socket end; 443. Limit end; 45. Reset member; 50. Air deflector; 2. Smoke collecting box; 3. Smoke inlet; 4. Fan box.

[0052] The above description of the main component symbols is combined with the accompanying drawings and specific implementation methods to further illustrate the present invention in detail. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0056] Considering that the existing four-link and other motion hinge mechanisms are more unstable as they get closer to the dead point, they are prone to jamming or shaking; the internal drive motor in the existing push rod motor or reduction motor needs to increase the speed when the reduction ratio is large, which brings greater motion noise, and the increase in speed will also lead to increased wear and tear, resulting in a decrease in the life of the push rod motor or reduction motor. Therefore, the present application provides a smoke baffle motion mechanism and a control method thereof and a range hood, which can solve the problem of insufficient self-locking force of the motion mechanism, so that the self-locking force can reach the strength limit of the motion mechanism.

[0057] Specifically, according to another aspect of the present application, Figure 1 As shown, one embodiment of the present application provides a range hood, which may include a fan box 4, a smoke collecting box 2 disposed below the fan box 4 and having a smoke inlet 3, and a smoke baffle movement mechanism 1 installed on the smoke collecting box 2, the smoke baffle movement mechanism 1 can open or close the smoke inlet 3, and expand the smoke collection area to improve the oil fume absorption effect when the smoke inlet 3 is opened. It can be understood that the range hood of the present application may also include, but is not limited to, a water tank, a water receiving box and / or a sensor to assist in completing the oil fume absorption function, which will not be repeated in this application.

[0058] More specifically, if Figures 2 to 7 As shown, the smoke baffle movement mechanism 1 may include a smoke baffle body 10, a hinge assembly 20, a drive assembly 30 and a limit assembly 40. The hinge assembly 20 includes a hinge bracket 21 for mounting on the smoke collecting box 2 and a transmission connecting rod 22 rotatably disposed on the hinge bracket 21 and fixedly connected to the smoke baffle body 10. The drive assembly 30 is drivingly connected to the transmission connecting rod 22, and is used to drive the transmission connecting rod 22 to rotate so as to drive the smoke baffle body 10 to flip. The limit assembly 40 includes a limit bracket 41 mounted on the hinge bracket 21, an electromagnet 42 disposed on the limit bracket 41, a stopper 43 slidably disposed on the limit bracket 41 and matched with the electromagnet 42, and a limit pin 44 rotatably disposed on the limit bracket 41 and used to abut against the transmission connecting rod 22.

[0059] In this way, Figure 6 As shown, when the electromagnet 42 is energized in the forward direction, the block 43 slides down toward the limit pin 44 under the drive of the electromagnet 42 to block the limit pin 44 from rotating, so as to maintain the mechanical limit of the limit pin 44 on the transmission link 22 to achieve self-locking of the mechanism; Figure 7 As shown, when the electromagnet 42 is reversely energized, the block 43 slides away from the limit pin 44 under the drive of the electromagnet 42 to allow the limit pin 44 to rotate, so as to release the mechanical limit of the limit pin 44 on the transmission link 22 to achieve mechanism unlocking.

[0060] It is worth noting that, on the one hand, when the range hood is turned on to perform the fume extraction operation, the transmission connecting rod 22 rotates forwardly under the drive of the driving assembly 30 to drive the smoke baffle body 10 to flip over and open the smoke inlet 3. At this time, the electromagnet 42 can be energized in the forward direction to drive the block 43 to slide toward the limit pin 44 to block the rotation of the limit pin 44, so that the limit pin 44 mechanically limits the transmission connecting rod 22 to ensure the stable self-locking of the smoke baffle movement mechanism 1. In theory, the self-locking force can reach the strength limit of the movement mechanism, that is, the limit assembly 40 will not become the weak point of the smoke baffle movement mechanism 1. On the other hand, when the range hood is shut down after completing the fume extraction operation, the electromagnet 42 can be energized in the reverse direction to drive the block 43 to slide away from the limit pin and allow the limit pin 44 to rotate, so that the limit pin 44 can release the mechanical limit of the transmission link 22 to unlock the smoke baffle movement mechanism 1, ensuring that the transmission link 22 can be driven by the drive assembly 30 to rotate in the reverse direction to drive the smoke baffle body 10 to flip and close the smoke inlet 3. It can be understood that the present application defines the energization when the electromagnet 42 drives the block 43 to extend to slide toward the limit pin 44 as positive energization, and defines the energization when the electromagnet 42 drives the block 43 to retract to slide away from the limit pin 44 as reverse energization; in addition, the present application defines the rotation when the transmission link 22 drives the smoke baffle body 10 to flip to open the smoke inlet 3 as positive rotation, and defines the rotation when the transmission link 22 drives the smoke baffle body 10 to flip to close the smoke inlet 3 as reverse rotation.

[0061] For example, Figures 2 to 4 As shown, the transmission connecting rod 22 may include a transmission shaft 221 drivingly connected to the driving assembly 30, a crank connecting rod 222 fixedly connected to the transmission shaft 221 and the smoke baffle body 10 at both ends, and a stop block 223 protruding from the crank connecting rod 222 and cooperating with the stop pin 44. In this way, when the smoke baffle body 10 is in an open state to open the smoke inlet 3, the stop pin 44 is stably in the reverse rotation path of the stop block 223 and abuts against the stop block 223 under the blocking of the stop block 43, so as to block the transmission connecting rod 22 from rotating in the reverse direction and realize the stable self-locking of the smoke baffle motion mechanism 1. In addition, when the stop block 43 slides away from the limit pin 44 to allow the limit pin 44 to rotate, the limit pin 44 can rotate under the abutment of the limit block 223 to release the mechanical limit, so that the transmission connecting rod 22 can rotate in the opposite direction under the drive of the driving assembly 30 to drive the smoke baffle body 10 to close the smoke inlet 3 and be in a closed state.

[0062] Alternatively, if Figures 5 to 7As shown, the stop pin 44 includes a rotating shaft 441 connected to the stop bracket 41, a sleeve end 442 sleeved on the rotating shaft 441 and used to abut against the stop block 43, and a stop end 443 extending from the sleeve end 442 along the radial direction of the rotating shaft 441 and used to abut against the stop block 223. In this way, when the stop block 43 abuts against the sleeve end 442 to block the rotation of the stop pin 44, the stop end 443 extends out of the stop bracket 41 to abut against the stop block 223, thereby blocking the reverse rotation of the transmission link 22 to achieve mechanical self-locking; and when the stop block 43 slides off the sleeve end 442 to allow the stop pin 44 to rotate, the stop end 443 will rotate under the abutment of the stop block 223 to retract the stop bracket 41, thereby releasing the mechanical limit of the transmission link 22 and allowing the transmission link 22 to rotate in the reverse direction.

[0063] Alternatively, if Figures 3 to 7 As shown, the rotating shaft 441 of the limit pin 44 is perpendicular to the transmission shaft 221, so that the limit pin 44 can rotate in the tangential direction of the transmission shaft 221, preventing the limit pin 44 from being structurally stuck with the limit block 223 when the stop block 43 slides away, ensuring that the smoke baffle movement mechanism 1 can be unlocked smoothly.

[0064] Alternatively, if Figure 4 As shown, the crank connecting rod 222 has a first rod segment 2221 radially extending from the transmission shaft 221 and a second rod segment 2222 extending circumferentially from the first rod segment 2221 and fixedly connected to the smoke baffle body 10; the limit block 223 extends from the first rod segment 2221 in a direction away from the second rod segment 2222, so as to facilitate the arrangement of the limit assembly 40 at a position away from the smoke baffle body 10, thereby ensuring that the limit assembly 40 is hidden in the smoke collecting box 2.

[0065] Alternatively, if Figures 5 to 7As shown, the limiting bracket 41 includes a rear plate body 411 fixedly connected to the hinge bracket 21, a pair of side plates 412 extending forward from the rear plate body 411 and plugged into the rotating shaft 441, and a bottom plate body 413 extending forward from the rear plate body 411 and located below the sleeve end 442; the rear plate body 411 is provided with a through hole 4110 matching the stop block 43. When the block 43 is extended through the through hole 4110 driven by the electromagnet 42, the block 43 is located between the sleeve end 442 and the bottom plate body 413 to block the limit pin 44 from rotating, so that the limit pin 44 blocks the transmission link 22 from rotating in the opposite direction to achieve stable self-locking of the smoke baffle movement mechanism 1; and when the block 43 is retracted through the through hole 4110 driven by the electromagnet 42, the block 43 is disengaged from the gap between the sleeve end 442 and the bottom plate body 413 to allow the limit pin 44 to rotate, so that the limit pin 44 releases the mechanical limit on the transmission link 22.

[0066] Alternatively, if Figures 5 to 7 As shown, the bottom plate body 413 is provided with a notch 4130 matching the limiting end 443 of the limiting pin 44, so as to avoid the limiting end 443 and prevent the limiting end 443 from having structural interference with the bottom plate body 413. In other words, when the driving assembly 30 drives the transmission connecting rod 22 to rotate forward to drive the smoke baffle body 10 to open the smoke inlet 3, the limiting pin 44 will be on the forward rotation path of the limiting block 223, so that the limiting end 443 of the limiting pin 44 will rotate into the notch 4130 of the bottom plate body 413 under the pressure of the limiting block 223, preventing the forward rotation of the transmission connecting rod 22 from being blocked, and ensuring that the smoke baffle body 10 can be opened normally.

[0067] Alternatively, if Figure 6 and Figure 7 As shown, the limit assembly 40 further includes a reset member 45 disposed between the limit bracket 41 and the limit pin 44, which is used to apply a reset force to the limit pin 44 so that the limit pin 44 extends out of the limit bracket 41. In this way, when the limit block 223 is separated from the limit pin 44, the limit pin 44 is reset under the action of the reset member 45, so that the limit end 443 of the limit pin 44 extends out of the limit bracket 41, so as to form a gap between the limit pin 44 and the bottom plate body 413 for the stop block 43 to extend into.

[0068] Optionally, the reset member 45 is implemented as a spring, and the two ends of the spring are respectively connected to the rear plate 411 of the limit bracket 41 and the sleeve end 442 of the limit pin 44, so as to accumulate elastic potential energy when the limit end 443 of the limit pin 44 retracts into the limit bracket 41, so that the limit pin 44 can rotate relative to the limit bracket 41 under the action of the spring, so that the limit end 443 extends out of the limit bracket 41 to abut against the transmission connecting rod 22. It can be understood that in other examples of the present application, the reset member 45 can also be implemented as a torsion spring, or a magnetic attraction member, as long as it can provide the required reset force, and the present application will not repeat it.

[0069] According to the above embodiments of the present application, Figure 2 and Figure 4 As shown, the driving assembly 30 may include a push rod motor 31 and a transmission handle 32, one end of the transmission handle 32 is fixedly connected to the transmission shaft 221, and the other end of the transmission handle 32 is rotatably connected to the push rod of the push rod motor 31. In this way, when the push rod motor 31 is energized in the forward direction, the push rod of the push rod motor 31 extends to drive the transmission handle 32 to drive the transmission shaft 221 to rotate in the reverse direction, so that the crank connecting rod 222 drives the smoke baffle body 10 to flip to close the smoke inlet 3; and when the push rod motor 31 is energized in the reverse direction, the push rod of the push rod motor 31 retracts to drive the transmission handle 32 to drive the transmission shaft 221 to rotate in the forward direction, so that the crank connecting rod 222 drives the smoke baffle body 10 to flip to open the smoke inlet 3.

[0070] It is worth noting that Figure 2 As shown, each transmission connecting rod 22 may include a transmission shaft 221, two crank connecting rods 222 and a stop block 223. The two crank connecting rods 222 are respectively mounted at both ends of the transmission shaft 221 and are respectively fixedly connected to the smoke baffle body 10, and the stop block 223 is arranged on one of the crank connecting rods 222. In this way, the smoke baffle motion mechanism 1 of the present application not only requires only one driving assembly 30 to realize the opening or closing of the smoke baffle body 10, but also requires only one stop assembly 40 to realize the self-locking and unlocking of the motion mechanism, which is conducive to simplifying the structure of the smoke baffle motion mechanism 1 and reducing costs.

[0071] In addition, if Figure 2 and Figure 4 As shown, the smoke baffle movement mechanism 1 of the present application may further include a deflector 50, which is disposed on the inner wall of the smoke baffle body 10 to move downward the negative pressure area below the smoke baffle body 10 when the smoke baffle body 10 is opened, thereby helping to improve the oil fume absorption effect.

[0072] It is worth mentioning that in order to ensure that the smoke baffle movement mechanism 1 is self-locking and does not hinder its normal movement, the present application requires a set of self-locking control methods for the push rod motor 31 and the electromagnet 42. Specifically, Figure 8 and Fig.11 As shown, an embodiment of the present application further provides a method for controlling a smoke baffle movement mechanism, which may include the steps of:

[0073] S100: when the range hood is turned on, the push rod motor and the electromagnet are synchronously controlled to be reversely energized, so that the transmission connecting rod rotates forward under the drive of the push rod motor to drive the smoke baffle body to open the smoke inlet, and the stopper slides away from the limit pin of the limit assembly under the action of the electromagnet; and

[0074] S200: When the smoke baffle body is fully opened, the electromagnet is controlled to be energized in the forward direction, so that the block slides toward the limit pin under the action of the electromagnet to achieve self-locking.

[0075] It is worth noting that when the smoke shield is fully opened, the limit block of the transmission connecting rod has passed the limit pin, and there is a small gap between the limit block and the limit pin; if the self-locking force of the push rod motor is insufficient, once the push rod motor is powered off, the smoke shield will fall down under the action of gravity. Therefore, when the smoke shield is fully opened, the push rod motor cannot be powered off immediately, but needs to be powered off after a predetermined time, so as to ensure that the block is extended in time to achieve self-locking.

[0076] More specifically, if Fig. 9 and Fig.11 As shown, step S200 in the control method of the smoke baffle movement mechanism of the present application may include the following steps:

[0077] S210: When the smoke baffle body is fully opened, the push rod travel switch is triggered; and

[0078] S220: After the push rod travel switch is triggered, the electromagnet is controlled to be energized in the forward direction, and the push rod motor is controlled to be de-energized after a predetermined delay.

[0079] In this way, during the period of delaying the power off for the predetermined time, the push rod motor will continue to retract the push rod to drive the smoke baffle body to continue to open; at the same time, the electromagnet will drive the block to complete the extension action to prevent the limit pin from rotating. After the predetermined time is delayed, the power off of the push rod motor will result in insufficient self-locking force; at this time, the smoke baffle body will drive the transmission connecting rod to fall back to a certain angle, but the transmission connecting rod will be resisted by the limit pin to complete self-locking. It can be understood that since the push rod motor will drive the smoke baffle body to continue to open during the period of delaying the power off, the smoke baffle movement mechanism of the present application can reserve a little movement margin of the smoke baffle body in the design, so that the smoke baffle body can continue to open a little more angle after opening in place; or, the smoke baffle movement mechanism of the present application can also add a mechanical limit in front of the push rod travel switch to hold the push rod dead; or, add a mechanical limit on the hinge bracket so that the smoke baffle body will not continue to open, and this application will not repeat it.

[0080] In addition, if Figure 8 and Fig.11 As shown, the control method of the smoke baffle movement mechanism of the present application may further include the steps of:

[0081] S300: When the range hood is turned off, determining whether the stopper is extended;

[0082] S400: In response to the block being extended, controlling the push rod motor to be energized in the reverse direction, and detecting the real-time reverse current of the push rod motor;

[0083] S500: determining whether the real-time reverse current is less than the preset current: if so, continuing to increase the current of the push rod motor; if not, controlling the electromagnet to be energized in the reverse direction so that the block slides away from the limit pin; and

[0084] S600: In response to the block not extending out, the push rod motor is controlled to be energized in the forward direction, so that the transmission connecting rod is driven by the push rod motor to rotate in the reverse direction to drive the smoke baffle body to close the smoke inlet.

[0085] It is worth noting that when the block is extended, it means that the limit pin is limiting the connecting rod; at this time, directly controlling the electromagnet to be energized in the reverse direction, the block is easily blocked by the limit pin and is difficult to retract or unable to move, thereby causing unlocking failure. Therefore, the control method of the smoke baffle movement mechanism of the present application first controls the push rod motor to be energized in the reverse direction to drive the smoke baffle body to open further when the block is extended, releases the pressure of the transmission connecting rod on the limit pin, and then releases the pressure of the limit pin on the block, so that the block can be smoothly retracted under the drive of the electromagnet to achieve unlocking.

[0086] In addition, in step S400, the push rod motor is powered by a ramp current, so that the push rod motor drives the smoke baffle body to exert force in the opening direction. It can be understood that the ramp current mentioned in the present application is a linearly increasing current. When the real-time reverse current of the push rod motor is less than the preset current, it indicates that the transmission link is still pressing on the limit pin, and the current of the push rod motor needs to be further increased; and when the real-time reverse current of the push rod motor is greater than or equal to the preset current, it indicates that the transmission link has no pressure on the limit pin, and the electromagnet can be controlled to be reversely energized to make the block slide away from the limit pin.

[0087] Alternatively, if Fig.10 and Fig.11 As shown, step S600 in the control method of the smoke baffle movement mechanism of the present application may include the following steps:

[0088] S610: Detecting the real-time forward current of the push rod motor; and

[0089] S620: Determine whether the real-time forward current is less than the stall current: if so, control the push rod motor to continue to receive power in the forward direction; if not, control the push rod motor to cut off power.

[0090] It can be understood that when the real-time forward current is less than the stall current, it indicates that the smoke baffle body is not closed in place, and it is necessary to continue to control the push rod motor to receive forward power until the real-time forward current is greater than or equal to the stall current, indicating that the smoke baffle body is closed in place.

[0091] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0092] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims

1. The smoke baffle movement mechanism is characterized by: include: Smoke shield body; A hinge assembly, comprising a hinge bracket for mounting on the smoke collecting box and a transmission connecting rod rotatably disposed on the hinge bracket and fixedly connected to the smoke baffle body; A driving assembly, drivingly connected to the transmission connecting rod, for driving the transmission connecting rod to rotate so as to drive the smoke baffle body to flip; and The limit assembly includes a limit bracket installed on the hinge bracket, an electromagnet arranged on the limit bracket, a stopper slidably arranged on the limit bracket and cooperating with the electromagnet, and a limit pin rotatably arranged on the limit bracket and used to abut against the transmission connecting rod.

2. The smoke baffle movement mechanism according to claim 1, characterized in that: When the electromagnet is energized in the forward direction, the block moves against the limit pin under the drive of the electromagnet to prevent the limit pin from rotating, thereby maintaining the mechanical limit of the transmission connecting rod by the limit pin; when the electromagnet is energized in the reverse direction, the block slides away from the limit pin under the drive of the electromagnet to allow the limit pin to rotate, thereby contacting the limit pin to mechanically limit the transmission connecting rod.

3. The smoke baffle movement mechanism according to claim 1 or 2, characterized in that: The transmission connecting rod comprises a transmission shaft drivingly connected to the driving assembly, a crank connecting rod fixedly connected to the transmission shaft and the smoke baffle body at both ends respectively, and a limit block protruding from the crank connecting rod and cooperating with the limit pin.

4. The smoke baffle movement mechanism according to claim 3, characterized in that: The crank connecting rod comprises a first rod segment extending radially from the transmission shaft and a second rod segment extending circumferentially from the first rod segment and fixedly connected to the smoke baffle body; the limit block extends from the first rod segment in a direction away from the second rod segment.

5. The smoke baffle movement mechanism according to claim 3, characterized in that: The limiting pin includes a rotating shaft connected to the limiting bracket, a sleeve end portion sleeved on the rotating shaft and used to abut against the stopper, and a limiting end portion extending from the sleeve end portion along the radial direction of the rotating shaft and used to abut against the limiting block.

6. The smoke baffle movement mechanism according to claim 5, characterized in that: The rotating shaft is perpendicular to the transmission shaft.

7. The smoke baffle movement mechanism according to claim 6, characterized in that: The limit bracket includes a rear plate body fixedly connected to the hinge bracket, a pair of side plates extending forward from the rear plate body and plugged into the rotating shaft, and a bottom plate body extending forward from the rear plate body and located below the sleeve end; the rear plate body is provided with a through hole matching the stop block.

8. The smoke baffle movement mechanism according to claim 7, characterized in that: The bottom plate body is provided with a notch matching the limiting end portion so as to avoid the limiting end portion.

9. The smoke baffle movement mechanism according to claim 7, characterized in that: The limiting assembly further comprises a reset member arranged between the limiting bracket and the limiting pin; the reset member is a spring with two ends respectively connected to the rear plate body and the sleeve end.

10. The smoke baffle movement mechanism according to claim 3, characterized in that: The driving assembly comprises a push rod motor and a transmission handle; one end of the transmission handle is fixedly connected to the transmission shaft, and the other end of the transmission handle is rotatably connected to the push rod of the push rod motor.

11. A range hood, characterized in that: include: Fan box; A smoke collecting box is arranged below the fan box and is provided with a smoke inlet; as well as The smoke baffle movement mechanism according to any one of claims 1 to 10, wherein the smoke baffle movement mechanism is installed on the smoke collecting box to open or close the smoke inlet.

12. A method for controlling a smoke baffle movement mechanism, characterized in that: Includes steps: When the range hood is turned on, the push rod motor and the electromagnet are synchronously controlled to be reversely energized, so that the transmission connecting rod is driven by the push rod motor to rotate forward to drive the smoke baffle body to open the smoke inlet, and the stopper slides away from the limit pin of the limit assembly under the action of the electromagnet; and When the smoke baffle body is fully opened, the electromagnet is controlled to be energized in the forward direction, so that the block slides toward the limit pin under the action of the electromagnet to achieve self-locking.

13. The control method of the smoke baffle movement mechanism according to claim 12, characterized in that: The step of controlling the electromagnet to be energized in the forward direction when the smoke baffle body is fully opened, so that the block slides toward the limit pin under the action of the electromagnet to achieve self-locking, comprises the following steps: When the smoke baffle body is fully opened, the push rod travel switch is triggered; and After the push rod travel switch is triggered, the electromagnet is controlled to be energized in the forward direction, and the push rod motor is controlled to be de-energized after a predetermined delay.

14. The control method of the smoke baffle movement mechanism according to claim 12 or 13, characterized in that: Also includes the steps: When the range hood is turned off, determining whether the stopper is extended; In response to the block being extended, the push rod motor is controlled to be energized in reverse direction, and the real-time reverse current of the push rod motor is detected; Determine whether the real-time reverse current is less than the preset current: if so, continue to increase the current of the push rod motor; if not, control the electromagnet to be energized in the reverse direction so that the block slides away from the limit pin; as well as In response to the block not extending out, the push rod motor is controlled to be energized in the forward direction, so that the transmission connecting rod is driven by the push rod motor to rotate in the reverse direction to drive the smoke baffle body to close the smoke inlet.

15. The control method of the smoke baffle movement mechanism according to claim 14, characterized in that: The step of controlling the push rod motor to be energized in the forward direction in response to the block not extending so that the transmission connecting rod rotates in the reverse direction under the drive of the push rod motor to drive the smoke baffle body to close the smoke inlet comprises the following steps: Detecting the real-time forward current of the push rod motor; and Determine whether the real-time forward current is less than the stall current: if so, control the push rod motor to continue to be energized in the forward direction; if not, control the push rod motor to be de-energized.

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