Oil screen drive device and method

Abstract

The present invention provides an oil screen transmission device and method, which relate to the technical field of kitchen appliances. When the range hood has been working for a period of time, the oil screen needs to be cleaned, and the device can be started. The device can detect whether the current state of the oil screen is in the first state or the second state through a sensing mechanism. Assuming that the current oil screen is in the first state, the driving mechanism can drive the first roller and the second roller to rotate in the positive direction, so that the oil screen moves toward the first roller, the first roller performs a winding action, and the second roller performs an unwinding action. The oil screen is cleaned when it passes through the first cleaning structure. When the sensing mechanism senses that the oil screen is in the second state, the driving mechanism stops, completing the conversion of the oil screen from the first state to the second state.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to an oil screen transmission device and method. Background Art

[0002] When the range hood works for a long time, a lot of oil will accumulate in the oil net, which not only affects the air volume performance of the range hood, but also easily breeds bacteria and mold, produces odor, and needs to be cleaned regularly.

[0003] The oil screen self-cleaning device not only improves the grease separation degree, avoids the fan performance degradation caused by grease and food residues adhering to the fan, ensures the efficient and stable operation of the fan, but also realizes the oil screen without disassembly and cleaning while ensuring the smoking effect, greatly improving the user experience.

[0004] The current patent only uses simple time control to control the oil screen transmission. The mesh is driven by the roller transmission to pass through the brush and cleaning liquid for a period of time, and then reversed for a period of time to move the cleaned oil screen to the working position again. The movement of the device is controlled by setting a predetermined time, which lacks stability and will result in large operating errors during long-term operation. Summary of the Invention

[0005] The purpose of the present invention is to provide an oil mesh transmission device and method to alleviate the technical problems in existing oil mesh transmission devices, which control the movement of the device by setting a predetermined time, lack stability, and have large operating errors during long-term operation.

[0006] In a first aspect, an embodiment of the present invention provides an oil mesh transmission device, comprising: an oil mesh, a drive mechanism, a sensing mechanism, a controller, a first roller assembly, and a second roller assembly, wherein the first roller assembly comprises a first roller body, the second roller assembly comprises a second roller body, and the first roller body and the second roller body are arranged parallel to and spaced apart from each other; the oil mesh comprises a first side edge and a second side edge arranged opposite to each other, the first side edge being connected to the first roller body, and the second side edge being connected to the second roller body;

[0007] The driving mechanism is connected to the first roller and the second roller respectively, and is used to drive the two rollers to roll, so that the oil screen switches between the first state and the second state;

[0008] The first roller assembly has a first cleaning structure, and the second roller assembly has a second cleaning structure, and both the first cleaning structure and the second cleaning structure are in contact with the oil screen;

[0009] The sensing mechanism can detect whether the oil screen is in the first state or the second state;

[0010] The controller is connected to the sensing mechanism and the driving mechanism respectively. When the sensing mechanism detects that the oil net is in one of the first state or the second state, the controller can drive the driving mechanism to drive the first roller and the second roller to rotate, so that the state of the oil net is switched to the other.

[0011] Furthermore, from the first side to the second side, the oil net has a first working part and a second working part arranged in sequence; the oil net has a first state and a second state, in the first state, the first working part is opposite to the working area of the range hood; in the second state, the second working part is opposite to the working area of the range hood.

[0012] Furthermore, the sensing mechanism includes a trigger unit and a sensor. The trigger unit is arranged on the oil net. In the first state and the second state, the sensor can sense the trigger unit.

[0013] Furthermore, the trigger unit is a touch member, and the sensor is a contact touch screen sensor. When the touch member contacts the sensor, the sensor is triggered.

[0014] Furthermore, the trigger unit is a fluorescent part, and the sensor is a fluorescent sensor. When the fluorescent part passes by the fluorescent sensor, the fluorescent sensor is triggered.

[0015] Furthermore, the trigger unit is located between the first working part and the second working part;

[0016] The sensor includes a first sensing unit and a second sensing unit, wherein the first sensing unit is located on the first roller assembly, and the second sensing unit is located on the second roller assembly.

[0017] Furthermore, the trigger unit includes a first trigger portion and a second trigger portion. From the first side to the second side, the first trigger portion is arranged at the middle position of the first working portion, and the second trigger portion is arranged at the middle position of the second working portion.

[0018] The sensor is disposed at a middle position between the first roller assembly and the second roller assembly.

[0019] Furthermore, the sensing mechanism includes a first pressure sensor arranged on the circumferential side wall of the first roller body and a second pressure sensor arranged on the circumferential side wall of the second roller body; in a first state, the pressure of the oil net on the first pressure sensor is less than or equal to a preset value, the first pressure sensor is in an untriggered state, the pressure of the oil net on the second pressure sensor is greater than the preset value, and the second pressure sensor is in a triggered state; in a second state, the pressure of the oil net on the second pressure sensor is less than or equal to the preset value, the second pressure sensor is in an untriggered state, the pressure of the oil net on the first pressure sensor is greater than the preset value, and the first pressure sensor is in a triggered state.

[0020] Furthermore, the driving mechanism includes a main motor and a transmission belt, the main motor is connected to the first roller or the second roller; the first roller and the second roller are connected by the transmission belt so that they have the same rotation state;

[0021] Alternatively, the driving mechanism includes a first motor and a second motor, the first motor is connected to the first roller body, and the second motor is connected to the second roller body.

[0022] In a second aspect, an embodiment of the present invention provides an oil mesh transmission method, which is implemented by the above-mentioned oil mesh transmission device and includes the following steps:

[0023] Step S1. Determine whether the oil filter is in the first state or the second state;

[0024] Step S2. When the oil screen is in the first state, driving the oil screen to move to the second state;

[0025] When the oil net is in the second state, the oil net is driven to move to the first state.

[0026] Furthermore, the step S1 specifically includes:

[0027] Counting the number of times the trigger unit on the oil network triggers the sensor, and judging whether the oil network is in the first state or the second state based on the number of times;

[0028] Alternatively, a sensor is used to detect a first trigger portion and a second trigger portion spaced apart on the oil net. When the first trigger portion disposed on the oil net moves to the sensor position and is detected by the sensor, the oil net is in the first state; when the second trigger portion disposed on the oil net moves to the sensor position and is detected by the sensor, the oil net is in the second state.

[0029] Alternatively, a first sensing unit and a second sensing unit arranged at intervals are used to sense a trigger unit on the oil net. When the trigger unit moves to the position of the first sensing unit and triggers the first sensing unit, the oil net is in the first state; when the trigger unit moves to the position of the second sensing unit and triggers the second sensing unit, the oil net is in the second state.

[0030] Alternatively, the pressure values of the first pressure sensor on the circumferential side wall of the first roller body and the second pressure sensor on the circumferential side wall of the second roller body are detected; when the pressure of the first pressure sensor is less than or equal to a preset value and the pressure of the second pressure sensor is greater than the preset value, the oil net is in the first state; when the pressure of the first pressure sensor is greater than the preset value and the pressure of the second pressure sensor is less than or equal to the preset value, the oil net is in the second state.

[0031] The principles and advantages of the oil screen transmission device provided by the embodiments of the present invention are as follows: When the range hood has been operating for a period of time and the oil screen needs to be cleaned, the device can be activated. The device can detect whether the oil screen is currently in the first state or the second state through a sensing mechanism. Assuming the oil screen is currently in the first state, the driving mechanism can drive the first roller and the second roller to rotate in a forward direction, causing the oil screen to move toward the first roller. The first roller rewinds and the second roller unwinds. A portion of the oil screen is cleaned as it passes through the first cleaning structure. When the sensing mechanism senses that the oil screen is in the second state, the driving mechanism stops, completing the transition from the first state to the second state. Conversely, if the oil screen is currently in the second state, the driving mechanism can drive the first roller and the second roller to rotate in a reverse direction, causing the oil screen to move toward the second roller. The first roller unwinds and the second roller rewinds. A portion of the oil screen is cleaned as it passes through the second cleaning structure. When the sensing mechanism senses that the oil screen is in the first state, the driving mechanism stops, completing the transition from the second state to the first state. The current state of the oil net is sensed by the sensing mechanism, and the driving mechanism is controlled to drive the oil net in the forward or reverse direction to avoid errors, thereby realizing the periodic reciprocating motion of the oil net between the first state and the second state, achieving the effect of regular cleaning of the oil net and ensuring the cleanliness of the interior of the range hood. This not only improves the efficiency and life of the range hood, but also greatly improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1A schematic diagram of the oil mesh transmission device provided in Example 1 of the present invention;

[0034] Figure 2 for Figure 1 A partial enlarged view of part A;

[0035] Figure 3 A schematic diagram of the oil net of the oil net transmission device provided in Example 1 of the present invention;

[0036] Figure 4 A schematic diagram of a first roller assembly of an oil screen transmission device provided in Example 1 of the present invention;

[0037] Figure 5 A schematic diagram of an oil mesh transmission device provided in Example 2 of the present invention;

[0038] Figure 6 A schematic diagram of the oil net of the oil net transmission device provided in Example 2 of the present invention;

[0039] Figure 7 A schematic diagram of an oil mesh transmission device provided in Example 3 of the present invention;

[0040] Figure 8 Schematic diagram of the first roller assembly of the oil mesh transmission device provided in Example 3 of the present invention.

[0041] Icon: 100- oil screen; 110- first working part; 120- second working part;

[0042] 210-first roller assembly; 220-second roller assembly;

[0043] 231-main motor; 232-first motor; 233-second motor;

[0044] 300-brush;

[0045] 610-touch element; 620-contact touch screen sensor;

[0046] 710 - first triggering unit; 720 - second triggering unit; 730 - fluorescence sensor;

[0047] 810-First pressure sensor. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] Example 1

[0050] The oil screen transmission device provided in the embodiment of the present invention can be installed at the smoke inlet of the smoke hood.

[0051] like Figure 1 As shown, the device includes an oil screen 100, a drive mechanism, a sensing mechanism, a controller, a first roller assembly 210, and a second roller assembly 220. The oil screen 100 is made of a flexible material capable of rolling and deforming. The first and second roller assemblies 210, 220 can be screwed onto opposite sides of the smoke hood's inlet, allowing the portion of the oil screen 100 between the first and second roller assemblies 210, 220 to cover the smoke hood's inlet. The controller is a conventional electronic device, such as a single-chip microcomputer or a PLC module.

[0052] The first roller assembly 210 includes a first roller body, and the second roller assembly 220 includes a second roller body. The first roller body and the second roller body are arranged parallel to each other and spaced apart. The oil net 100 has a length at least twice the distance between the first roller body and the second roller body. The oil net 100 includes a first side and a second side oppositely disposed. The first side is connected to the first roller body, and the second side is connected to the second roller body.

[0053] The drive mechanism is connected to the first and second rollers, respectively, to drive them to roll, thereby achieving the winding and unwinding of the first and second rollers. In one embodiment, the drive mechanism may include a main motor 231 and a transmission belt wound around the first and second rollers. The main motor 231 is connected to the first or second roller, for example, the first roller. When the main motor 231 is activated, it can drive the first roller to rotate actively, and then the first roller drives the second roller via the transmission belt, so that the first and second rollers have the same rotational state.

[0054] like Figure 7As shown, in another embodiment, the drive mechanism may include a first motor 232 and a second motor 233. The first motor 232 is connected to the first roller, and the second motor 233 is connected to the second roller. For example, when the first roller needs to be wound and the second roller needs to be unwound, the first motor 232 is activated, while the second motor 233 may not be activated. As the first roller rotates, the second roller is driven by the mesh. Conversely, when the second roller needs to be wound and the first roller needs to be unwound, the second motor 233 is activated, while the first motor 232 may not be activated. As the second roller rotates, the first roller is driven by the mesh. The first and second motors 232 and 233 alternate in forward rotation in this manner, achieving periodic reciprocating motion of the oil screen 100. Using a dual-motor solution can prevent single-motor transmission instability caused by uneven tension in the oil screen 100 due to changes in the diameter of the first and second rollers (the more turns of the oil screen 100 are wound, the larger the diameter), thereby improving transmission stability.

[0055] From the first side to the second side, the oil net 100 has a first working part 110 and a second working part 120 arranged in sequence. The areas of the first working part 110 and the second working part 120 are both larger than the area of the working area (larger than the area of the smoke inlet hole of the smoke hood), thereby completely covering the working area on the smoke hood.

[0056] The oil net 100 has a first state and a second state. In the first state, the first working part 110 is opposite to the working area of the range hood; in the second state, the second working part 120 is opposite to the working area of the range hood. The oil net 100 can be switched back and forth between the first state and the second state by rotating the first roller and the second roller.

[0057] The first roller assembly 210 has a first cleaning structure, and the second roller assembly 220 has a second cleaning structure. Both the first cleaning structure and the second cleaning structure are in contact with the oil net 100. When the oil net 100 switches between the first and second states, the oil net 100 can contact the first and second cleaning structures, respectively, thereby cleaning the oil net 100. The first and second cleaning structures can both have brushes 300 and liquid reservoirs containing cleaning liquid. The liquid reservoirs contain cleaning liquid, and the portion of the oil net 100 wrapped around the first roller or the second roller is immersed in the cleaning liquid.

[0058] The sensing mechanism can detect whether the oil net 100 is in the first state or the second state; the controller is connected to the sensing mechanism and the driving mechanism respectively. When the sensing mechanism detects that the oil net 100 is in the first state, the controller can drive the driving mechanism to rotate the first roller and the second roller to switch the oil net 100 to the second state; when the sensing mechanism detects that the oil net 100 is in the second state, the controller can drive the driving mechanism to rotate the first roller and the second roller to switch the oil net 100 to the first state.

[0059] The principles and advantages of the oil screen transmission device provided by the embodiment of the present invention are as follows: when the range hood has been working for a period of time, the oil screen 100 needs to be cleaned, and the device can be started. The device can detect whether the current state of the oil screen 100 is in the first state or the second state through the sensing mechanism. Assuming that the current oil screen 100 is in the first state, the driving mechanism can drive the first roller and the second roller to rotate in the positive direction, so that the oil screen 100 moves toward the first roller, the first roller performs a winding action, and the second roller performs an unwinding action. The first working part 110 is cleaned when it passes through the first cleaning structure, and when the second working part 120 moves to align with the working area of the range hood, that is, when the sensing mechanism senses that the oil screen 100 is in the second state, the driving mechanism stops, completing the conversion of the oil screen 100 from the first state to the second state. Conversely, when the oil screen 100 is currently in the second state, the drive mechanism can reversely drive the first and second rollers to rotate, causing the oil screen 100 to move toward the second roller. The first roller unwinds, while the second roller rewinds. The second working portion 120 is cleaned as it passes through the second cleaning structure. When the first working portion 110 aligns with the working area of the range hood, that is, when the sensing mechanism detects that the oil screen 100 is in the first state, the drive mechanism stops, completing the transition of the oil screen 100 from the second state to the first state. The sensing mechanism senses the current state of the oil screen 100 and controls the drive mechanism to drive the oil screen 100 in the forward or reverse direction, thereby achieving periodic reciprocating motion of the oil screen 100 between the first and second states, achieving the effect of regularly cleaning the oil screen 100 and ensuring the cleanliness of the interior of the range hood. This not only improves the efficiency and lifespan of the range hood, but also greatly enhances the user experience.

[0060] The sensing mechanism includes a trigger unit and a sensor. The trigger unit is mounted on the oil screen 100. The sensor can sense the trigger unit in both the first and second states. The movement of the oil screen 100 drives the movement of the trigger unit. When the oil screen 100 moves between the first and second states, the sensor can sense the trigger unit.

[0061] like Figure 2As shown, specifically, in this embodiment, the trigger unit is a touch member 610, and the sensor is a contact touch screen sensor 620. When the touch member 610 contacts the sensor, the sensor is triggered.

[0062] like Figure 3 and Figure 4 As shown, the contact member 610 can be a rod extending along the width of the oil screen 100, positioned midway between the first working portion 110 and the second working portion 120. A contact touchscreen sensor 620 is positioned on each of the first and second roller assemblies 210 and 220, serving as a first sensing unit and a second sensing unit, respectively. When the first working portion 110 is located at the air duct opening (working area) within the range hood to intercept oil fumes, the second working portion 120 is wrapped around the second roller, and the rod contacts the sensor on the second roller assembly 220, allowing the sensing mechanism to identify the current state as the first state. Conversely, when the second working portion 120 is operating, the first working portion 110 is wrapped around the first roller for cleaning, and the rod contacts the sensor on the first roller assembly 210, allowing the sensing mechanism to identify the current state as the second state.

[0063] To prevent accidental activation, the corresponding control method for the device is configured to automatically activate the transmission mechanism only after the range hood has operated for a certain time, t, and then automatically shuts down. The time, t, can be set by the user, for example, 5 minutes. After the transmission mechanism is activated, the initial operating portion is set to the first operating portion 110 by default. Therefore, the total number of triggers detected by the sensing mechanism is 0. The driving mechanism drives forward, winding the first working portion 110 onto the first roller and simultaneously pulling out the second working portion 120, which is wrapped around the second roller. This occurs until the rod contacts the first sensing unit on the first roller assembly 210. The first sensing unit transmits a signal to the controller, causing the driving mechanism to stop rotating and the total number of triggers for the sensing mechanism to count as 1. Similarly, upon the next operation, the driving mechanism operates in reverse, retracting the second working portion 120 and pulling out the first working portion 110. The driving mechanism reciprocates, achieving periodic reciprocating motion of the oil screen 100. Furthermore, if the total number of triggers is an odd number, the oil screen 100 is in the second state, while if the total number of triggers is an even number, the oil screen 100 is in the first state.

[0064] Example 2

[0065] like Figure 5 As shown, unlike the contact triggering method in Example 1, this embodiment adopts non-contact triggering. The triggering unit is a fluorescent part, and the sensor is a fluorescent sensor 730. When the fluorescent part passes by the fluorescent sensor 730, the fluorescent sensor 730 is triggered. The non-contact method can prevent oil from being transferred between various components.

[0066] In one possible implementation, the fluorescent portion can be strip-shaped and located between the first working portion 110 and the second working portion 120. The fluorescent sensors 730 are provided on both the first roller assembly 210 and the second roller assembly 220, serving as the first sensing unit and the second sensing unit, respectively. When the first working portion 110 is located at the air duct opening (working area) within the range hood to intercept oil fumes, the second working portion 120 is wrapped around the second roller, with the fluorescent portion located above the second sensing unit. The sensing mechanism can detect the current state as the first state. Conversely, when the second working portion 120 is operating, the first working portion 110 is wrapped around the first roller for cleaning, with the fluorescent portion located above the first sensing unit. The sensing mechanism can detect the current state as the second state.

[0067] like Figure 5 and Figure 6 As shown, in another embodiment, the trigger unit may include a first trigger portion 710 and a second trigger portion 720. From the first side to the second side, the first trigger portion 710 is disposed in the middle of the first working portion 110, and the second trigger portion 720 is disposed in the middle of the second working portion 120. The sensor is disposed in the middle of the first roller assembly 210 and the second roller assembly 220.

[0068] In other words, there may be two triggering units, with the first triggering portion 710 and the second triggering portion 720 both being fluorescent patterns that can be detected by the fluorescence sensor 730. The first triggering portion 710 and the second triggering portion 720 can both be rectangular strip structures extending along the width of the oil screen 100 and can be attached to the oil screen 100 by spraying. The first triggering portion 710 and the second triggering portion 720 are respectively positioned between the first working portion 110 and the second working portion 120 of the oil screen 100. The fluorescence sensor 730 is also positioned centrally between the first roller assembly 210 and the second roller assembly 220. When the first working portion 110 or the second working portion 120 moves to the center of the flue and assumes its working position, the fluorescence sensor 730 detects the first triggering portion 710 or the second triggering portion 720 on the oil screen 100. After the transmission device is activated, the first working section is set to the first working section 110 by default. Therefore, the total number of triggers detected by the sensing mechanism is 0. The drive mechanism drives forward, winding the first working section 110 onto the first roller and simultaneously pulling out the second working section 120 wound on the second roller. When the second triggering section 720 reaches the middle position between the first roller assembly 210 and the second roller assembly 220, it is detected by the fluorescence sensor 730. The fluorescence sensor 730 then transmits a signal to the controller, causing the drive mechanism to stop rotating and the total number of triggers to count to 1. Similarly, during the next operation, the drive mechanism operates in the reverse direction, retracting the second working section 120 and pulling out the first working section 110. The drive mechanism then reciprocates, achieving periodic reciprocating motion of the oil screen 100. Furthermore, an odd total number of triggers indicates that the oil screen 100 is in the second state, while an even total number of triggers indicates that the oil screen 100 is in the first state.

[0069] In this embodiment, in addition to determining the state of the oil screen 100 by counting the number of triggers, the current state of the oil screen 100 can also be determined by setting the fluorescent colors of the first trigger part 710 and the second trigger part 720 to be different. For example, the fluorescent color of the first trigger part 710 is the first color, and the fluorescent color of the second trigger part 720 is the second color. After the transmission device is working, the fluorescent sensor 730 is first used to detect the color of the fluorescent pattern on the oil screen 100 it is facing, so as to determine whether it is facing the first trigger part 710 or the second trigger part 720, and then determine whether the oil screen 100 is in the first state or the second state.

[0070] Example 3

[0071] like Figure 8As shown, the difference from Example 1 and Example 2 is that, in this embodiment, the sensing mechanism includes a first pressure sensor 810 arranged on the circumferential side wall of the first roller body and a second pressure sensor arranged on the circumferential side wall of the second roller body; in the first state, the pressure of the oil net 100 on the first pressure sensor 810 is less than or equal to the preset value, the first pressure sensor 810 is in an untriggered state, the pressure of the oil net 100 on the second pressure sensor is greater than the preset value, and the second pressure sensor is in a triggered state; in the second state, the pressure of the oil net 100 on the second pressure sensor is less than or equal to the preset value, the second pressure sensor is in an untriggered state, the pressure of the oil net 100 on the first pressure sensor 810 is greater than the preset value, and the first pressure sensor 810 is in a triggered state.

[0072] The preset value can be set to zero. For example, when the oil screen 100 switches from the first state to the second state, when the oil screen 100 is in the first state, the oil screen 100 may not be wrapped around the circumferential sidewall of the first roller, but is only connected to the first side edge of the oil screen 100. At this time, the pressure detected by the first pressure sensor 810 is zero. However, the second working portion 120 is wrapped around the circumferential sidewall of the second roller and presses against the second pressure sensor. Therefore, the pressure detected by the second pressure sensor is greater than zero, allowing the sensing mechanism to determine that the current state is the first state. After the transmission device is activated, the first roller reels and the second roller unwinds. The first working portion 110 gradually wraps around the sidewall of the first roller and presses against the first pressure sensor 810, causing the value detected by the first pressure sensor 810 to gradually increase. Simultaneously, as the second roller unwinds, the second working portion 120 is completely released from the second roller, and the pressure detected by the second pressure sensor is zero. The sensing mechanism determines that the system has switched to the second state, thereby stopping the drive mechanism from continuing to operate.

[0073] Mounting holes are provided on the circumferential sidewalls of the first and second rollers. The first and second pressure sensors 810 and 811 each include a main body and a retractable detection terminal connected to the main body. The main body is located within the mounting hole, and the detection terminal extends from the opening of the mounting hole. The main body and the detection terminal may be connected by a spring.

[0074] The oil screen 100 transmission method provided in an embodiment of the present invention is implemented by the above-mentioned oil screen transmission device and includes the following steps:

[0075] Step S1: Determine whether the oil screen 100 is in the first state or the second state.

[0076] For the devices of Examples 1 and 2, after the transmission device is turned on, the first working section is set to the first working section 110 by default. Therefore, the total number of triggers detected by the sensing mechanism is 0. The driving mechanism drives forward, winding the first working section 110 onto the first roller and simultaneously pulling out the second working section 120 wound on the second roller until the contact sensor or the fluorescence sensor 730 is triggered. The sensing mechanism then transmits a signal to the controller, controlling the driving mechanism to stop rotating, and the total number of triggers of the sensing mechanism is counted as 1. Similarly, during the next operation, the driving mechanism operates in the reverse direction to retract the second working section 120 and pull out the first working section 110. The driving mechanism then reciprocates, achieving periodic reciprocating motion of the oil screen 100. Furthermore, when the total number of triggers is an odd number, it indicates that the oil screen 100 is in the second state, while when the total number of triggers is an even number, the oil screen 100 is in the first state.

[0077] For the device of Example 3, the preset value can be set to zero. For example, when the oil screen 100 switches from the first state to the second state, when the oil screen 100 is in the first state, the oil screen 100 may not be wrapped around the circumferential sidewall of the first roller body and is only connected to the first side edge of the oil screen 100. At this time, the pressure value detected by the first pressure sensor 810 is zero. However, the second working portion 120 is wrapped around the circumferential sidewall of the second roller body and presses the second pressure sensor. Therefore, the pressure value detected by the second pressure sensor is greater than zero, and the sensing mechanism can determine that the current state is the first state. Similarly, when the pressure value detected by the first pressure sensor 810 is greater than zero and the pressure value detected by the second pressure sensor is equal to zero, the current state is the second state.

[0078] Step S2. When the oil net 100 is in the first state, driving the oil net 100 to move to the second state;

[0079] When the oil net 100 is in the second state, the oil net 100 is driven to move to the first state.

[0080] Taking the oil filter 100 as being in the first state as an example, when it switches to the second state, the sensing mechanism is triggered, the driving mechanism stops running, and waits for the next start of the transmission device.

[0081] The method further includes a step performed before step S1: counting the working time of the range hood, and performing step S1 when the working time of the range hood is greater than a preset time value; otherwise, step S1 is not performed.

[0082] The range hood can be set to shut down after running for a certain time t, and then the transmission device will be automatically turned on. The time t can be set by the user, for example 5 minutes. That is to say, the range hood needs to filter smoke for a longer period of time before it needs to be cleaned, so as to avoid repeated cleaning of the oil net 100, which leads to waste of electricity.

[0083] When it is detected that the operating time of the range hood exceeds the preset time value, the transmission device waits for 1 minute and then proceeds to step S1, thereby avoiding interference between the transmission device and other components of the range hood.

[0084] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil net transmission device, characterized in that: include: An oil screen (100), a driving mechanism, a sensing mechanism, a controller, a first roller assembly (210), and a second roller assembly (220), wherein the first roller assembly (210) includes a first roller body, the second roller assembly (220) includes a second roller body, and the first roller body and the second roller body are arranged in parallel and spaced apart; the oil screen (100) includes a first side edge and a second side edge arranged opposite to each other, the first side edge is connected to the first roller body, and the second side edge is connected to the second roller body; The driving mechanism is connected to the first roller body and the second roller body respectively, and is used to drive the two roller bodies to roll, so that the oil screen (100) switches between the first state and the second state; The first roller assembly (210) has a first cleaning structure, and the second roller assembly (220) has a second cleaning structure, and both the first cleaning structure and the second cleaning structure are in contact with the oil screen (100); The sensing mechanism can detect whether the oil screen (100) is in the first state or the second state; The controller is connected to the sensing mechanism and the driving mechanism respectively, and when the sensing mechanism detects that the oil screen (100) is in one of the first state and the second state, the controller can drive the driving mechanism to drive the first roller and the second roller to rotate, so that the state of the oil screen (100) is switched to the other state; From the first side to the second side, the oil net (100) has a first working portion (110) and a second working portion (120) arranged in sequence; the oil net (100) has a first state and a second state, and in the first state, the first working portion (110) is directly opposite to the working area of the range hood; In the second state, the second working portion (120) faces the working area of the range hood.

2. The oil net transmission device according to claim 1, characterized in that: The sensing mechanism comprises a trigger unit and a sensor; the trigger unit is arranged on the oil net (100); in a first state and a second state, the sensor can sense the trigger unit.

3. The oil net transmission device according to claim 2, characterized in that: The trigger unit is a touch member (610), and the sensor is a contact-type touch screen sensor (620). When the touch member (610) contacts the sensor, the sensor is triggered.

4. The oil net transmission device according to claim 2, characterized in that: The trigger unit is a fluorescent portion, and the sensor is a fluorescent sensor (730). When the fluorescent portion passes by the fluorescent sensor (730), the fluorescent sensor (730) is triggered.

5. The oil net transmission device according to claim 3 or 4, characterized in that: The trigger unit is located between the first working part (110) and the second working part (120); The sensor comprises a first sensing unit and a second sensing unit, wherein the first sensing unit is located on the first roller assembly (210), and the second sensing unit is located on the second roller assembly (220).

6. The oil net transmission device according to claim 4, characterized in that: The trigger unit comprises a first trigger portion (710) and a second trigger portion (720), and from the first side to the second side, the first trigger portion (710) is arranged at a middle position of the first working portion (110), and the second trigger portion (720) is arranged at a middle position of the second working portion (120); The sensor is arranged at a middle position between the first roller assembly (210) and the second roller assembly (220).

7. The oil net transmission device according to claim 1, characterized in that: The sensing mechanism comprises a first pressure sensor (810) arranged on the circumferential side wall of the first roller body and a second pressure sensor arranged on the circumferential side wall of the second roller body; in a first state, the pressure exerted by the oil net (100) on the first pressure sensor (810) is less than or equal to a preset value, and the first pressure sensor (810) is in an untriggered state; the pressure exerted by the oil net (100) on the second pressure sensor is greater than the preset value, and the second pressure sensor is in a triggered state; in a second state, the pressure exerted by the oil net (100) on the second pressure sensor is less than or equal to the preset value, and the second pressure sensor is in an untriggered state; the pressure exerted by the oil net (100) on the first pressure sensor (810) is greater than the preset value, and the first pressure sensor (810) is in a triggered state.

8. The oil net transmission device according to claim 2 or 7, characterized in that: The driving mechanism comprises a main motor (231) and a transmission belt, wherein the main motor (231) is connected to the first roller or the second roller; the first roller and the second roller are connected via the transmission belt so as to have the same rotation state; Alternatively, the driving mechanism comprises a first motor (232) and a second motor (233), wherein the first motor (232) is connected to the first roller body, and the second motor (233) is connected to the second roller body.

9. An oil network transmission method, characterized in that: The method is implemented by the oil mesh transmission device according to any one of claims 1 to 8, comprising the steps of: Step S1. Determine whether the oil screen (100) is in the first state or the second state; Step S2. When the oil screen (100) is in the first state, driving the oil screen (100) to move to the second state; When the oil net (100) is in the second state, the oil net (100) is driven to move to the first state.

10. The oil net transmission method according to claim 9, characterized in that: The step S1 specifically includes: Counting the number of times the trigger unit on the oil net (100) triggers the sensor, and judging whether the oil net (100) is in the first state or the second state based on the number of times; Alternatively, a sensor is used to detect a first trigger portion (710) and a second trigger portion (720) spaced apart on the oil net (100); when the first trigger portion (710) disposed on the oil net (100) moves to the sensor position and is detected by the sensor, the oil net (100) is in a first state; when the second trigger portion (720) disposed on the oil net (100) moves to the sensor position and is detected by the sensor, the oil net (100) is in a second state; Alternatively, a first sensing unit and a second sensing unit arranged at intervals are used to sense a trigger unit on the oil net (100); when the trigger unit moves to the position of the first sensing unit and triggers the first sensing unit, the oil net (100) is in a first state; when the trigger unit moves to the position of the second sensing unit and triggers the second sensing unit, the oil net (100) is in a second state; Alternatively, the pressure values of a first pressure sensor (810) on the circumferential side wall of the first roller body and a second pressure sensor on the circumferential side wall of the second roller body are detected; when the pressure of the first pressure sensor (810) is less than or equal to a preset value and the pressure of the second pressure sensor is greater than the preset value, the oil net (100) is in a first state; when the pressure of the first pressure sensor (810) is greater than the preset value and the pressure of the second pressure sensor is less than or equal to the preset value, the oil net (100) is in a second state.

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