Air purifying device and control method thereof

Abstract

The application discloses an air purification device and a control method thereof. The air purification device comprises a shell, a wet membrane assembly, a sensing assembly and a controller. A water tank is arranged in the shell. The wet membrane assembly comprises two rotating shafts rotating in the same direction, a wet membrane wound on the two rotating shafts, and a motor connected with the rotating shafts. The sensing assembly comprises a reference element arranged on the rotating shafts and a sensing element fixed on the shell, and the sensing element is used for sensing whether the reference element rotates. The controller is connected with the sensing element and the motor. When the motor is started and the controller does not receive the sensing signal of the sensing element sensing the reference element within a preset time, the controller controls the motor to drive the rotating shafts to reverse. The air purification device can solve the problem that the wet membrane is difficult to rotate normally after crystalline salt particles are generated.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and in particular to an air purification device and its control method. Background Technology

[0002] In related technologies, the air purification device is internally equipped with a water tank, an electrolysis module, and a wet membrane assembly. The electrolysis module can electrolyze the salt water in the water tank into disinfectant water, which is then carried into the air duct by the rotating wet membrane of the wet membrane assembly. Finally, the airflow in the air duct carries away the disinfectant water evaporated from the wet membrane, thereby achieving air disinfection and purification.

[0003] When the air purification device is not in disinfection mode, the electrolysis module and wet membrane assembly are typically inactive. However, because the lower end of the wet membrane is still immersed in the water tank, and due to its material properties, the wet membrane has a self-absorbing effect, it gradually absorbs water from the tank and evaporates. After a period of time, the water content in the tank decreases while the salt concentration remains almost unchanged, causing the salt concentration in the tank to increase. This high concentration of salt water is absorbed by the wet membrane and crystallizes on it, forming salt particles. These salt particles harden the wet membrane, making it difficult to drive it to rotate normally when the disinfection mode is activated later. Summary of the Invention

[0004] The main objective of this invention is to provide an air purification device that addresses the problem of the wet film's inability to rotate properly after salt crystallization.

[0005] To achieve the above objectives, the present invention proposes an air purification device, comprising a housing, a wet film assembly, a sensing assembly, and a controller; a water tank is provided inside the housing; the wet film assembly includes two rotating shafts that can rotate in the same direction, a wet film wound on the two rotating shafts, and a motor connected to the rotating shafts; the sensing assembly includes a reference component disposed on the rotating shafts and a sensing element fixed to the housing, the sensing element being used to sense whether the reference component is rotating; the controller is connected to the sensing element and the motor; if the controller does not receive a sensing signal from the sensing element indicating that the reference component has been sensed within a preset time after the motor is turned on, the controller controls the motor to drive the rotating shafts to reverse.

[0006] Optionally, the two rotating shafts include a driven shaft immersed in the water tank and a driving shaft located above the driven shaft and connected to the motor; the reference member is disposed on the driving shaft.

[0007] Optionally, the drive shaft includes a shaft body for the wet film roll sleeve and an end plate disposed at the end of the shaft body; the reference member is fixed on the outer edge of the end plate.

[0008] Optionally, the water tank is provided with a mounting bracket for mounting the rotating shaft, and the mounting bracket is provided with a motor mount for mounting the motor; the sensing element is mounted on the motor mount.

[0009] Optionally, the motor mount has a fixed arm protruding above the drive shaft; the sensing element is mounted on the lower side of the fixed arm.

[0010] Optionally, the preset time is greater than or equal to the rotation period of the shaft, but less than twice the rotation period of the shaft.

[0011] Optionally, the sensing element is a Hall sensor; the reference element is a magnetic element.

[0012] Optionally, the shaft is provided with multiple sets of inserts arranged along its axial direction, each set of inserts including multiple inserts spaced apart around the circumference of the shaft for insertion into the mesh on the wet film.

[0013] Optionally, the air purification device further includes an electrolysis module installed on the water tank to electrolyze the brine in the water tank.

[0014] The present invention also provides a control method for an air purification device, the control method comprising: Turn on the motor of the wet film assembly to drive the shaft to rotate forward and move the wet film through the water tank; Within a preset time T1, when the controller receives a sensing signal from the sensor indicating that the reference component on the rotating shaft has been sensed, it controls the motor to drive the rotating shaft to maintain forward rotation. If the controller does not receive a sensing signal from the sensor indicating that the reference component on the rotating shaft has been detected within a preset time T1, it controls the motor to drive the rotating shaft to reverse.

[0015] Optionally, after controlling the motor drive shaft to reverse, the control method further includes the following steps: During the running time T2 after the shaft reverses, when the controller receives the sensing signal, it controls the motor to drive the shaft to keep rotating in the reversed direction; If the controller still does not receive the sensing signal within the running time T2 after the shaft reverses, it controls the motor to drive the shaft to reverse again.

[0016] Optionally, before turning on the humidifying motor, the control method for the air purification device further includes: Turn on the electrolysis module to electrolyze the brine in the water tank; The electrolysis module operates for a time T3, wherein the operating time T3 is greater than or equal to a preset operating time T. y .

[0017] Optionally, the preset time T1 is greater than or equal to the rotation period of the shaft, and less than twice the rotation period of the shaft; and / or, the running time T2 is greater than or equal to the rotation period of the shaft, and less than twice the rotation period of the shaft.

[0018] Optionally, the sensing element is a Hall sensor; the reference element is a magnetic element.

[0019] The technical solution of the present invention involves configuring a sensing component within an air purification device. This sensing component includes a reference element mounted on the rotating shaft of the wet film assembly, and a sensing element fixed within the housing of the air purification device. Both the sensing element and the motor of the wet film assembly are connected to a controller. If, within a preset time after the motor is turned on, the controller does not receive a sensing signal from the sensing element indicating that the reference element has been detected, it controls the motor to drive the rotating shaft in reverse. This reverse rotation wears down or shakes off the crystalline salt particles on the wet film, causing them to redissolve. The number of crystalline salt particles on the wet film is reduced or eliminated to zero, thus restoring the wet film to a softer state. The rotating shaft can then drive the wet film to rotate normally through the water tank. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a partial structural schematic diagram of an embodiment of the air purification device of the present invention; Figure 2 for Figure 1 A schematic diagram of a section of the air purification device from another perspective; Figure 3 for Figure 1 Assembly diagram of water tank, wet film assembly, and sensing assembly of air purification device; Figure 4 for Figure 3 Enlarged view of point A in the middle; Figure 5 for Figure 3 A schematic diagram of the mid-assembly structure after the wet membrane has been removed; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 for Figure 5 Schematic diagram of the structural breakdown of the mid-assembly structure; Figure 8 for Figure 7 Enlarged view of point C in the middle; Figure 9 for Figure 7 A schematic diagram of the assembly of the motor and the sensing element; Figure 10 This is a flowchart of an embodiment of the control method for the air purification device of the present invention; Figure 11 for Figure 10 A flowchart of the further steps in the control method; Figure 12 This is a flowchart of another embodiment of the control method for the air purification device of the present invention.

[0022] Explanation of icon numbers:

[0023] The objectives, features, and advantages of this invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0027] Please see Figures 1 to 3This invention provides an embodiment of an air purification device, which includes a housing 100, a wet film assembly 200, a sensing assembly 300, and a controller. The housing 100 contains a water tank 110. The wet film assembly 200 includes two rotating shafts (210 / 220) that rotate in the same direction, a wet film 230 wound around the two shafts, and a motor 240 connected to the shafts. The sensing assembly 300 includes a reference member 320 mounted on the shafts and a sensing member 310 fixed within the housing 100. The sensing member 310 senses whether the reference member 320 is rotating (see reference [reference missing]). Figure 5 and Figure 6 The controller is connected to the sensor 310 and the motor 240. If, within a preset time after the motor 240 is turned on, the controller does not receive a sensing signal from the sensor 310 indicating that the reference element 320 has been sensed, it controls the motor 240 to drive the rotating shaft in reverse.

[0028] Specifically, the housing 100 is provided with an air inlet, an air outlet, and a purification air duct connecting the air inlet and the air outlet; the purification air duct passes through a water tank 110. Two rotating shafts of the wet film assembly 200 are rotatably mounted inside the housing 100, and the two rotating shafts are arranged vertically on the water tank 110; the lower rotating shaft is immersed in the water tank 110. The wet film 230 of the wet film assembly 200 is annularly arranged, with its two ends respectively wound around the two rotating shafts. The wet film assembly 200 may have only one rotating shaft as the driving shaft connected to the motor 240, and the other rotating shaft as the driven shaft, driven by the driving shaft through the wet film 230. Alternatively, the two rotating shafts of the wet film assembly 200 may be connected to a single motor 240 via a linkage assembly (such as a gear and rack combination), thereby enabling one motor 240 to simultaneously drive both rotating shafts. Of course, in other embodiments, each shaft of the wet film assembly 200 may be equipped with a motor 240.

[0029] The reference element 320 is disposed on any one of the rotating shafts. It should be noted that the reference element 320 should be disposed at a local position on the circumference of the rotating shaft, so that the reference element 320 can rotate to a position opposite to the sensing element 310 during the rotation period of the rotating shaft, and thus be sensed by the sensing element 310.

[0030] When the air purification device is activated in disinfection mode, the motor 240 of the wet membrane assembly 200 starts. When the motor 240 drives the rotating shaft to rotate, the two rotating shafts will drive the wet membrane 230 to rotate, so that the wet membrane 230 passes through the water tank 110 along its circumference, thereby absorbing the aqueous solution in the water tank 110; then the airflow passing through the purification duct carries away the water vapor evaporated from the wet membrane 230, thereby achieving air disinfection and purification.

[0031] Because a reference element 320 is provided on the rotating shaft of the wet film assembly 200, the reference element 320 will rotate coaxially with the rotating shaft. If no salt particles crystallize on the wet film 230 of the wet film assembly 200, or if only a small number of salt particles crystallize, the wet film 230 will remain relatively soft. Thus, after the disinfection mode is activated, the rotating shaft of the wet film assembly 200 can rotate normally, which will allow the wet film 230 to pass normally through the water tank 110; that is, the rotating shaft can rotate normally for at least one revolution, and correspondingly, the reference element 320 can also rotate for more than one revolution. During this revolution, the reference element 320 can rotate to a position opposite to the sensing element 310, and thus be sensed by the sensing element 310. Therefore, when the sensing element 310 senses the reference element 320, it indicates that the wet film 230 is working normally, and the motor 240 can be controlled to drive the rotating shaft to continue rotating in the original direction.

[0032] If a large amount of salt particles crystallize on the wet membrane 230 of the wet membrane assembly 200, the wet membrane 230 hardens. Therefore, after the disinfection mode is activated, the hardened wet membrane 230 tightly wraps around the rotating shaft, making it difficult for the rotating shaft to rotate forward, and thus making it difficult to drive the wet membrane 230 normally through the water tank 110. Correspondingly, the reference component 320 on the rotating shaft is difficult to rotate to the position opposite to the sensing component 310. If the sensing component 310 does not sense the reference component 320 for a period of time, it indicates that the rotating shaft cannot maintain forward rotation to drive the wet membrane 230 to work. At this time, the control motor 240 drives the rotating shaft to reverse. The reverse rotation of the rotating shaft can wear down or shake off the crystallized salt particles on the wet membrane 230 and redissolve them. The number of crystallized salt particles on the wet membrane 230 is reduced or cleared to zero, thereby restoring the wet membrane 230 to a softer state. Then, the rotating shaft can drive the wet membrane 230 to rotate normally through the water tank 110 and resume normal operation.

[0033] Based on this, in the air purification setting of the present invention, if the controller does not receive a sensing signal from the sensor 310 indicating that the reference element 320 has been sensed within a preset time after the motor 240 is turned on, it indicates that the sensor 310 has not sensed the reference element 320, that is, the reference element 320 is not rotating normally, which means that the rotating shaft cannot maintain forward rotation to drive the wet film 230 to work. Therefore, by controlling the motor 240 to drive the rotating shaft to reverse, the reverse rotation of the rotating shaft can grind and refine or shake off the crystalline salt particles on the wet film 230 and redissolve them. The crystalline salt particles on the wet film 230 are reduced or cleared to zero, thereby restoring the wet film 230 to a softer state. Then, the rotating shaft can drive the wet film 230 to rotate normally through the water tank 110. The preset time T1 is stored in the controller; the preset time T1 is greater than or equal to the rotation period T0 of the rotating shaft, and less than twice the rotation period T0 of the rotating shaft, that is, T0≤T1≤2T0. Optionally, it can also be T0≤T1≤1.5T0. The specific design can be tailored to actual needs.

[0034] It is understandable that before the shaft reverses, although it cannot rotate a full revolution, it can actually rotate a small range. Therefore, after the motor 240 controls the shaft to reverse, the shaft can still rotate a certain range and will not become completely fixed due to the hardening of the wet film 230. Thus, driving the shaft to reverse can grind or shake off the crystalline salt particles on the wet film 230, making the wet film 230 softer. Optionally, to improve the efficiency of softening the wet film 230, after the shaft reverses for the first time, if the controller still does not receive the sensing signal during the operating period, it can continue to control the motor 240 to drive the shaft to reverse again, repeating this cycle multiple times (equivalent to controlling the shaft to alternate between clockwise and counterclockwise rotation), thereby repeatedly grinding or shaking off the crystalline salt particles on the wet film 230. Until the controller receives the sensing signal, it drives the shaft to rotate in one direction, allowing the wet film to return to normal operation.

[0035] Regarding the installation position of the sensor 310, the sensor 310 should be designed accordingly based on the position of the reference component 320, so that the sensor 310 can sense the reference component 320 when the reference component 320 is rotated to one of its positions. For example, the sensor 310 can be fixed on the mounting bracket 120 inside the housing 100, or it can be fixed on the motor 240 or the motor mount 130 of the motor 240. The sensor 310 can be located above or below the reference component 320.

[0036] The technical solution of the present invention involves configuring a sensing component 300 within an air purification device. The sensing component 300 includes a reference component 320 mounted on the rotating shaft of the wet film assembly 200 and a sensing component 310 fixed within the housing 100 of the air purification device. Both the sensing component 310 and the motor 240 of the wet film assembly 200 are connected to a controller. If the controller does not receive a sensing signal from the sensing component 310 within a preset operating time of the motor 240, it controls the motor 240 to drive the rotating shaft to reverse. This reverse rotation wears down or shakes off the crystalline salt particles on the wet film 230, causing them to redissolve. The number of crystalline salt particles on the wet film 230 is reduced or eliminated to zero, thereby restoring the wet film 230 to a softer state. The rotating shaft can then drive the wet film 230 to rotate normally through the water tank 110.

[0037] Please see Figures 4 to 6 In one embodiment, to facilitate the installation of the wet film assembly 200, a mounting bracket 120 for mounting the rotating shaft is provided inside the housing 100, and the mounting bracket 120 is erected on the water tank 110. A motor mount 122 for mounting the motor 240 is also provided on the mounting bracket 120. Specifically, the two rotating shafts of the wet film assembly 200 are arranged vertically on the mounting bracket 120 and rotatably connected to it. The motor mount 122 is located at the top of the mounting bracket 120 and at one end of the uppermost rotating shaft; the motor 240 of the wet film assembly 200 is mounted inside the motor mount 122 and extends through the motor mount 122 to connect with its corresponding rotating shaft to drive the rotating shaft to rotate.

[0038] Please see Figure 3 , Figure 5 and Figure 6 In one embodiment, the two rotating shafts include a driven shaft 220 immersed in the water tank 110, and a drive shaft 210 located above the driven shaft 220 and connected to the motor 240. Specifically, the driven shaft 220 is rotatably mounted on the lower end of the mounting bracket 120, thereby immersing the driven shaft 220 in the water tank 110. The drive shaft 210 is rotatably mounted on the upper end of the mounting bracket 120, and one end of the drive shaft 210 is connected to the motor 240. The upper end of the wet film 230 is wound around the drive shaft 210, and the lower end of the wet film 230 is wound around the driven shaft 220. The wet film 230 is in a tensioned state under the action of the drive shaft 210 and the driven shaft 220. When the motor 240 is working, the motor 240 drives the drive shaft 210 to rotate, thereby causing the wet film 230 to rotate up and down. The wet film 230 passes through the water tank 110 along its circumference in sequence, thereby wetting the entire wet film 230 and realizing the absorption of water by the wet film 230.

[0039] Optionally, the reference element 320 is disposed on the drive shaft 210. Correspondingly, the sensing element 310 can be fixed within the housing 100 at a position close to the drive shaft 210, with the sensing element 310 positioned on the same side (e.g., above or below, left or right) as the reference element 320. Of course, in other embodiments, the reference element 320 can also be disposed on the driven shaft 220; in this case, the sensing element 310 is correspondingly fixed within the housing 100 at a position close to the driven shaft 220.

[0040] Please see Figure 3 , Figure 7 and Figure 8 Furthermore, the drive shaft 210 includes a shaft body 211 for supplying the wet film 230 for winding, and an end plate 212 disposed at the end of the shaft body 211; the reference member 320 is fixed on the outer edge of the end plate 212. Specifically, the shaft body 211 of the drive shaft 210 is elongated to supply the wet film 230 for winding; the end plate 212 is circular, and the diameter of the end plate 212 is larger than the diameter of the shaft body 211. Fixing the reference member 320 on the outer edge of the end plate 212 can prevent the wet film 230 from obstructing the reference member 320, thereby facilitating the sensing of the reference member 310.

[0041] Regarding the fixing method of the reference member 320, the reference member 320 can be clamped and fixed on the end plate 212, or it can be fixed by a snap-fit ​​device provided on the end plate 212; of course, an insertion hole for the reference member 320 to be inserted can also be provided on the end plate 212. Specifically, in this embodiment, the reference member 320 is U-shaped, and clamping portions (such as...) are formed on opposite sides of the reference member 320. Figure 7 and Figure 8 As shown), the reference member 320 is clamped on the outer edge of the end plate 212 by the two clamping parts.

[0042] Please see Figures 5 to 8 In one embodiment, the water tank 110 is provided with a mounting bracket 120 for mounting the wet film assembly 200; the mounting bracket 120 is provided with a motor mount 130 for mounting the motor 240. Thus, the sensor 310 can be mounted on the motor mount 130, thereby eliminating the need for an additional structure for mounting the sensor 310.

[0043] Specifically, the motor 240 is mounted inside the motor housing 130, and the motor shaft of the motor 240 passes through the motor housing 130 and is connected and fixed to one end of the drive shaft 210. The sensor 310 can be on the end face of the motor housing 130 facing the drive shaft 210, or it can be fixed to the top surface of the motor housing 130. Optionally, the motor housing 130 has a protruding fixed arm 131 located above the drive shaft 210, and the sensor 310 is mounted on the lower surface of the fixed arm 131 and is opposite to the rotation trajectory of the reference member 320 on the drive shaft 210.

[0044] Regarding the method of fixing the sensor 310, a snap-fit ​​structure can be provided on the fixing arm 131 to fix the sensor 310 to the fixing arm 131. Alternatively, a limiting slot (such as...) can be provided on the fixing arm 131. Figure 9 As shown in the figure, the sensor 310 is directly inserted into the limiting slot, which makes it simple and easy to install and remove the sensor 310.

[0045] Please see Figure 7 and Figure 8 In one embodiment, for the rotating shaft, the shaft body 211 is provided with multiple sets of insertion posts 201 arranged at intervals along its axial direction. Each set of insertion posts 201 includes multiple insertion posts 201 arranged at intervals around the circumference of the shaft body 211, for insertion into the mesh on the wet film 230 to drive the wet film 230 to rotate.

[0046] When the shaft rotates, the posts 201 on one side of the shaft are sequentially and orderly inserted into the mesh of the wet film 230, thereby stably driving the wet film 230 to rotate; while the posts 201 on the other side of the shaft are sequentially separated from the wet film 230, allowing the wet film 230 to continue rotating under the drive of the two shafts. Furthermore, since the posts 201 can be inserted into the wet film 230 and have a certain strength, when the wet film 230 is hardened by crystalline salt particles, driving the shaft to reverse can also cause the posts 201 to be inserted into the mesh of the wet film 230, thereby puncturing the crystalline salt particles in the mesh of the wet film 230, reducing the amount of crystalline salt particles on the wet film 230, and softening the wet film 230.

[0047] Based on any of the above embodiments, the sensing element 310 and the reference element 320 of the sensing component 300 can be combined in various ways. For example, in one embodiment, the sensing element 310 is a Hall sensor; the reference element 320 is a magnetic element that can be sensed by the Hall sensor. The Hall sensor is currently quite common in the market; while the magnetic element can be a magnet, a lodestone, or other magnetic structure.

[0048] Of course, in other embodiments, the sensor 310 and the reference element 320 can also be combined in other ways. For example, the reference element 320 can be a tag with a barcode or QR code; the sensor 310 can be a scanner capable of scanning the tag. As another example, the sensor 310 can also be a signal transmitter with a transmitting unit and a receiving unit, and the reference element 320 can be a reflector capable of reflecting signals. When the signal transmitter emits a signal through its transmitting unit, and this signal directly hits the reflector, the reflector reflects the signal back to the receiving unit of the signal transmitter; at this time, after receiving the signal, the receiving unit of the signal transmitter can also feed back the sensing signal to the controller.

[0049] Based on any of the above embodiments, the air purification device further includes an electrolysis module (not shown in the figure), which is installed on the water tank 110 to electrolyze the brine in the water tank 110. The electrolysis plate of the electrolysis module is at least partially immersed in the water tank 110, thereby electrolyzing the brine in the water tank 110 into disinfectant. As for the installation method of the electrolysis module, there can be various design options. For example, the electrolysis module is fixedly installed in the water tank 110; or, the electrolysis module is rotatably installed in the water tank 110.

[0050] Please see Figure 10 The present invention also provides a control method for an air purification device, the specific structure of which is described in the above embodiments. Since this air purification device employs all the technical solutions of all the above embodiments, it also possesses all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here. The air purification device can be a standalone purification device, such as a sterilizer; or it can be a purification device configured inside an air conditioner. In one embodiment, the control method for the air purification device includes: S10. Turn on the motor 240 of the wet film assembly 200 to drive the rotating shaft to rotate forward and drive the wet film 230 through the water tank 110; Specifically, the wet film assembly 200 of the air purification device includes two rotating shafts (210 / 220) that can rotate in the same direction, a wet film 230 wound around the two rotating shafts, and a motor 240 connected to the rotating shafts; and one of the rotating shafts is immersed in a water tank 110. Normally, after the motor 240 is turned on, the two rotating shafts rotate clockwise, driving the wet film 230 to rotate through the water tank 110, thereby wetting the wet film 230. However, before the motor 240 is turned on, due to the self-absorption effect, crystalline salt particles may form on the wet film 230, making it difficult for the rotating shafts to rotate normally. Therefore, it is necessary to determine whether the rotating shafts are rotating normally.

[0051] S20. Within a preset time T1, when the controller receives the sensing signal from the sensing element 310 that it senses the reference element 320 on the rotating shaft, it controls the motor 240 to drive the rotating shaft to keep rotating in the forward direction. Specifically, the air purification device is equipped with a sensing component 300, which includes a reference component 320 that rotates coaxially with the rotating shaft, and a sensing component 310 fixed inside the housing that senses the reference component 320; the reference component 320 will rotate coaxially with the rotating shaft. The controller is connected to the sensing component 310 and the motor 240. If no salt particles crystallize on the wet film 230 of the wet film assembly 200, or if there are few crystallized salt particles, the wet film 230 will remain in a relatively soft state. Thus, after the disinfection mode is activated, the rotating shaft of the wet film assembly 200 can rotate normally, which can also drive the wet film 230 to pass normally through the water tank 110; that is, the rotating shaft can rotate normally for at least one revolution, and correspondingly, the reference component 320 can also rotate for more than one revolution. During this revolution, the reference component 320 can rotate to a position opposite to the sensing component 310, and thus be sensed by the sensing component 310, which will then send a sensing signal back to the controller. Therefore, when the controller receives the sensing signal, it indicates that the rotating shaft can rotate normally for at least one revolution, and the rotating shaft can drive the wet membrane 230 to rotate normally for humidification. That is to say, there are no crystallized salt particles or very few crystallized salt particles on the wet membrane 230, and the wet membrane 230 is relatively soft and can be driven by the rotating shaft. In this way, by controlling the motor to drive the rotating shaft to keep rotating in the forward direction, the wet membrane assembly 200 can be operated normally.

[0052] As for the preset operating time T1 of motor 240, the preset time T1 is pre-stored in the controller; the preset time T1 is greater than or equal to the rotation period T0 of the shaft, and less than twice the rotation period T0 of the shaft, that is, T0≤T1≤2T0. Optionally, it can also be T0≤T1≤1.5T0. The specific design can be reasonably tailored according to actual needs.

[0053] S30. If the controller does not receive a sensing signal from the sensor 310 indicating that the reference element 320 on the rotating shaft is sensed within a preset time T1, the controller controls the motor 240 to drive the rotating shaft to reverse.

[0054] Specifically, if a large number of salt particles crystallize on the wet membrane 230 of the wet membrane assembly 200, the wet membrane 230 hardens. Therefore, after the disinfection mode is activated, the hardened wet membrane 230 tightly wraps around the rotating shaft, making it difficult for the rotating shaft to rotate in the forward direction, and thus making it difficult to drive the wet membrane 230 to pass normally through the water tank 110. Correspondingly, the reference component 320 on the rotating shaft is difficult to rotate to a position opposite to the sensing component 310. If the sensing component 310 does not sense the reference component 320 within a preset time T1, it indicates that the rotating shaft cannot maintain forward rotation to drive the wet membrane 230 to work.

[0055] Therefore, when the controller does not receive the sensing signal, it indicates that the rotating shaft cannot rotate normally for at least one revolution. The rotating shaft cannot drive the wet film 230 to rotate and humidify normally, meaning there are many crystalline salt particles on the wet film 230, and the wet film 230 is too hard to be driven by the rotating shaft. In this case, controlling the motor to drive the rotating shaft in reverse reverses the rotation, thus enabling the wet film assembly 200 to work normally. The reverse rotation grinds or shakes off the crystalline salt particles on the wet film 230, causing them to redissolve. This reduces or eliminates the crystalline salt particles on the wet film 230, restoring it to a softer state. Then, the rotating shaft can drive the wet film 230 to rotate normally through the water tank 110.

[0056] It is understandable that before the shaft reverses, although it cannot rotate a full revolution, it can actually rotate a small range. Therefore, after the motor 240 controls the shaft to reverse, the shaft can still rotate a certain range and will not become completely fixed due to the hardening of the wet film 230. Thus, driving the shaft to reverse can grind or shake off the crystalline salt particles on the wet film 230, making the wet film 230 softer. Optionally, to improve the efficiency of softening the wet film 230, after the shaft reverses for the first time, if the controller still does not receive the sensing signal during the operating period, it can continue to control the motor 240 to drive the shaft to reverse again, repeating this cycle multiple times (equivalent to controlling the shaft to alternate between clockwise and counterclockwise rotation), thereby repeatedly grinding or shaking off the crystalline salt particles on the wet film 230. Until the controller receives the sensing signal, it drives the shaft to rotate in one direction, allowing the wet film to return to normal operation.

[0057] Please see Figure 11 Optionally, in order to improve the efficiency of softening of the wet film 230, after controlling the motor drive shaft to reverse, the control method further includes the following steps: S31. During the running time T2 after the shaft reverses, when the controller receives the sensing signal, it controls the motor 240 to drive the shaft to keep rotating in the reversed direction. Specifically, if there are few crystalline salt particles on the wet film 230, then after the shaft reverses once, the wet film 230 may become flexible enough to be driven by the shaft to rotate continuously and normally. However, if there are many crystalline salt particles on the wet film 230, after the shaft reverses once, the wet film 230 will still remain in a relatively hard state, and it may be difficult to be driven by the shaft to rotate continuously. Therefore, during the running time T2 after the motor 240 drives the shaft to reverse, it is necessary to continue to determine whether the controller receives the sensing signal fed back by the sensing element 310, so as to know whether the wet film 230 has become sufficiently soft after changing direction once.

[0058] During the operating time T2 after the shaft reverses, when the controller receives the sensing signal, it indicates that the wet film 230 has recovered to a state where it can be driven to rotate. Therefore, controlling the motor 240 to drive the shaft to maintain rotation in the reversed direction allows the wet film 230 to operate normally. For example, if the shaft's rotation direction before the reverse was clockwise, then the rotation direction after the reverse is counterclockwise; therefore, when the controller receives the sensing signal, it can control the motor to drive the shaft to maintain counterclockwise rotation. Of course, in other embodiments, the motor can also be controlled to reverse the shaft again to rotate in the direction before the switch.

[0059] S32. If the controller still does not receive the sensing signal within the running time T2 after the shaft reverses, then the controller controls the motor to drive the shaft to reverse again. Specifically, if the controller still does not receive the sensing signal within the running time T2 after the shaft reverses, it means that after one reverse rotation, the shaft still cannot rotate normally for at least one revolution. This indicates that there are many crystalline salt particles on the wet film 230, and the wet film 230 is still relatively hard and difficult to be driven by the shaft. In this case, the motor is controlled to drive the shaft to reverse again. This process of step S32 is repeated to control the shaft to alternate between clockwise and counterclockwise rotation multiple times, thereby achieving the effect of repeatedly grinding or shaking off the crystalline salt particles on the wet film 230. After this preset time period, driving the shaft to rotate in one direction will allow the wet film 230 to work normally.

[0060] Based on any of the above embodiments, regarding the specific duration of the preset time T1, optionally, the preset time T1 is greater than or equal to the rotation period of the shaft, and less than twice the rotation period of the shaft, i.e., T0 ≤ T1 ≤ 2T0. Alternatively, it can also be T0 ≤ T1 ≤ 1.5T0. The specific duration can be reasonably designed according to actual needs. As for the specific duration of the running time T2, optionally, the running time T2 is greater than or equal to the rotation period of the shaft, and less than twice the rotation period of the shaft, i.e., T0 ≤ T2 ≤ 2T0. Alternatively, it can also be T0 ≤ T2 ≤ 1.5T0. The specific duration can be reasonably designed according to actual needs. The preset time T1 can be equal to or unequal to the running time T2.

[0061] Please see Figure 12 In one embodiment, before turning on the humidifying motor, the control method of the air purification device further includes: A10. Turn on the electrolysis module to electrolyze the brine in the water tank 110; A20. Control the operating time T3 of the electrolysis module, wherein the operating time T3 is greater than or equal to the preset operating time T. y .

[0062] Specifically, if the electrolysis module's operating time T3 is less than the preset operating time T... y (i.e., T3 < T) y This indicates that the electrolysis module's operating time is insufficient, and the disinfectant concentration is too low to effectively disinfect and purify the air. Therefore, the electrolysis module should be kept running until its operating time T3 is greater than or equal to the preset operating time Ty (i.e., T3 ≥ T). y This indicates that the concentration of disinfectant water formed by the electrolysis of brine in the electrolysis module is sufficient for disinfection and sterilization; then, the humidification motor can be turned on, causing the wet membrane assembly to operate and carry the disinfectant water to the purification duct path of the air purification device. The preset working time T y The preset working time T can be reasonably set according to the electrolysis efficiency of the electrolysis module and the brine concentration required by the user. y It can be pre-stored in the controller before leaving the factory, or it can be set by the user.

[0063] Based on any of the above embodiments, the sensing element 310 and the reference element 320 of the sensing component 300 can be combined in various ways. For example, in one embodiment, the sensing element 310 is a Hall sensor; the reference element 320 is a magnetic element that can be sensed by the Hall sensor. The Hall sensor is currently quite common in the market; while the magnetic element can be a magnet, a lodestone, or other magnetic structure.

[0064] Of course, in other embodiments, the sensor 310 and the reference element 320 can also be combined in other ways. For example, the reference element 320 can be a tag with a barcode or QR code; the sensor 310 can be a scanner capable of scanning the tag. As another example, the sensor 310 can also be a signal transmitter with a transmitting unit and a receiving unit, and the reference element 320 can be a reflector capable of reflecting signals. When the signal transmitter emits a signal through its transmitting unit, and this signal directly hits the reflector, the reflector reflects the signal back to the receiving unit of the signal transmitter; at this time, after receiving the signal, the receiving unit of the signal transmitter can also feed back the sensing signal to the controller.

[0065] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An air purification device, characterized in that, The air purification device includes: A housing, wherein a water tank is provided inside the housing; A wet film assembly includes two rotating shafts that can rotate in the same direction, a wet film wound on the two rotating shafts, and a motor connected to the rotating shafts; the shaft of each rotating shaft is provided with multiple sets of insertion posts arranged along its axial direction, each set of insertion posts including multiple insertion posts arranged circumferentially along the shaft for insertion into the mesh on the wet film; A sensing assembly, comprising a reference member disposed on the rotating shaft and a sensing element fixed to the housing, the sensing element being used to sense whether the reference member rotates; and A controller is connected to the sensor and the motor. If, within a preset time after the motor is turned on, the controller does not receive a sensing signal from the sensor indicating that the reference element has been detected, it controls the motor to drive the rotating shaft in reverse. The preset time is greater than or equal to the rotation period of the rotating shaft, but less than twice the rotation period of the rotating shaft. After the first reverse rotation of the rotating shaft, if the controller still does not receive the sensing signal within the operating time, it controls the motor to drive the rotating shaft in reverse again, repeating this cycle multiple times until the controller receives the sensing signal and drives the rotating shaft to maintain rotation in one direction. The two rotating shafts include a driven shaft immersed in the water tank and a driving shaft located above the driven shaft and connected to the motor; the reference member is disposed on the driving shaft; The drive shaft includes a shaft body for the wet film roll sleeve and an end plate disposed at the end of the shaft body. The shaft body is elongated, and the end plate is circular with a diameter larger than that of the shaft body. The reference member is U-shaped, and clamping portions are formed on opposite sides of the reference member. The reference member is clamped on the outer edge of the end plate by the two clamping portions.

2. The air purification device as described in claim 1, characterized in that, The water tank is provided with a mounting bracket for mounting the rotating shaft, and the mounting bracket is provided with a motor mount for mounting the motor; the sensing element is mounted on the motor mount.

3. The air purification device as described in claim 2, characterized in that, The motor mount has a fixed arm protruding above the drive shaft; the sensor is mounted on the lower side of the fixed arm.

4. The air purification device according to any one of claims 1 to 3, characterized in that, The sensing element is a Hall sensor; the reference element is a magnetic element.

5. The air purification device according to any one of claims 1 to 3, characterized in that, The air purification device also includes an electrolysis module, which is installed on the water tank to electrolyze the salt water in the water tank.

6. A control method for an air purification device, characterized in that, The air purification device is the air purification device as described in any one of claims 1 to 5, and the control method includes: Turn on the motor of the wet film assembly to drive the shaft to rotate forward and move the wet film through the water tank; Within a preset time T1, when the controller receives a sensing signal from the sensor indicating that the reference component on the rotating shaft has been sensed, it controls the motor to drive the rotating shaft to maintain forward rotation. If the controller does not receive a sensing signal from the sensor indicating that the reference component on the rotating shaft has been detected within a preset time T1, it controls the motor to drive the rotating shaft to reverse.

7. The control method as described in claim 6, characterized in that, After controlling the motor drive shaft to reverse, the control method further includes the following steps: During the running time T2 after the shaft reverses, when the controller receives the sensing signal, it controls the motor to drive the shaft to keep rotating in the reversed direction; If the controller still does not receive the sensing signal within the running time T2 after the shaft reverses, it controls the motor to drive the shaft to reverse again.

8. The control method as described in claim 6, characterized in that, Before activating the motor of the wet film assembly, the control method for the air purification device further includes: Turn on the electrolysis module to electrolyze the brine in the water tank; The electrolysis module operates for a time T3, wherein the operating time T3 is greater than or equal to a preset operating time T. y .

9. The control method according to any one of claims 6 to 8, characterized in that, The preset time T1 is greater than or equal to the rotation period of the shaft, and less than twice the rotation period of the shaft; and / or, the running time T2 is greater than or equal to the rotation period of the shaft, and less than twice the rotation period of the shaft.

Images