A protection method, controller and fan for a fan head-shaking mechanism

Abstract

The application provides a protection method of a fan swing mechanism, a controller and a fan, and belongs to the technical field of pumping devices or systems specially applied to elastic fluids. The protection method is that after the fan is arranged on a site and powered on, the controller collects a one-way swing time of a swing seat from one limit position to another limit position under normal working conditions, then the controller collects a current swing time and compares the current swing time with the one-way swing time, if a difference between the current swing time and the one-way swing time exceeds a certain value in 1-3 seconds, it is indicated that a corresponding position switch is faulty and cannot feedback a signal, considering normal error fluctuation, there is at least a delay of 1 second, at the same time, the delay time is prevented from being too long to cause the swing motor to be damaged, at most, there is a delay of 3 seconds, the controller controls the swing motor to stop, and the fan is prevented from being faulty; if the value is not exceeded, the swing motor works normally.

Description

Technical Field

[0001] This invention relates to a protection method, controller, and fan for a fan oscillation mechanism, belonging to the technical field of pumping devices or systems specifically applicable to elastic fluids. Background Technology

[0002] Ordinary fans only blow air and are generally used indoors. Cooling mist fans, on the other hand, can spray mist while blowing air, and are widely used in outdoor locations such as stadiums, scenic spots, shuttle bus stops, parks, open-air performance venues, and night markets. Most existing fans are equipped with an oscillating mechanism to adjust the range and angle of the airflow or cooling mist.

[0003] For example, Chinese utility model patent CN204985001U discloses a fan with adjustable blowing angle. The fan includes a base, a bracket on the base, an oscillating motor on the bracket, an oscillating shaft connected to the oscillating motor, a rotary motor connected to the oscillating shaft, and rotating blades connected to the rotary motor via a rotary shaft. The oscillating motor has an oscillating adjuster, and the bracket has a controller connected to the oscillating adjuster and the oscillating motor. The oscillating adjuster includes an inner ring, a outer shell, and an adjusting cavity. The inner ring has a gear ring, and the adjusting cavity has left and right adjusting gears that mesh with the gear ring. The left and right adjusting gears are respectively connected to adjusting motors, and the adjusting motors are connected to limit switches. The oscillating shaft has an oscillating rod at the adjuster position, and the oscillating rod has a contact block. When the fan oscillates, the oscillating shaft drives the oscillating rod to rotate, which in turn drives the contact block to rotate. When the contact block rotates to the left and touches the left limit switch, the controller controls the oscillating motor to rotate to the right. When the contact block rotates to the right and touches the right limit switch, the controller controls the oscillating motor to rotate to the left.

[0004] In the aforementioned fan, the fan head consists of a rotating motor, a rotating shaft, and rotating blades. Typically, the oscillating shaft drives an oscillating base to swing, and the fan head is mounted on the oscillating base. In this fan, the limit switch remains stationary during the oscillation process, while the contact block (i.e., the triggering structure) moves accordingly. In some existing technologies, the limit switch moves during the oscillation process, while the triggering structure remains fixed. Regardless of the form, due to the repeated stress on the trigger end of the limit switch, it is prone to failure after prolonged use, losing its ability to provide feedback signals. When the limit switch and the triggering structure come into contact, one scenario is that the oscillating base can no longer rotate, while the oscillating motor continues to output torque, causing the oscillating motor to stall and leading to fan failure. Another scenario is that the contact arm of the limit switch is damaged, allowing the limit switch and the triggering structure to disengage, allowing the oscillating base to continue rotating. However, the wires connected to the motor controlling the fan blade rotation will eventually break, also causing fan failure.

[0005] If a preset value could be established for the single-stroke oscillation time of the oscillating fan (the time it takes for the oscillating fan to swing from one extreme position to another), the controller could detect the current oscillation time and compare it with the preset value. If the preset value is exceeded, it indicates that the oscillating fan started oscillating from one extreme position but did not reach the other extreme position within the preset time, resulting in a delay. In this case, the limit switch at the corresponding position (or other types of position switches, such as proximity switches) must have malfunctioned and could not provide feedback signals. Therefore, the oscillating motor would be controlled to stop working. However, in reality, when fans are installed on-site, the oscillation angle needs to be determined according to the actual needs of the site. Different oscillation angles correspond to different single-stroke oscillation times, so it is impossible to preset a uniform single-stroke oscillation time for every fan. Therefore, how to promptly control the oscillating motor to stop after a position switch malfunctions to avoid fan failure is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0006] The purpose of this invention is to provide a protection method for a fan oscillation mechanism, so as to solve the problem that the oscillation motor cannot stop in time after the position switch fails, resulting in fan failure in the prior art; the purpose of this invention is also to provide a controller and a fan to solve the above problems.

[0007] To achieve the above objectives, the protection method for the fan oscillation mechanism in this invention adopts the following technical solution: A protection method for a fan oscillation mechanism: After the fan is installed on-site and powered on, the controller collects the one-way oscillation time taken for the oscillation base to swing from one extreme position to another under normal working conditions. The controller then collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If the difference does not exceed the value, the oscillation motor operates normally.

[0008] The beneficial effects of the above technical solution are as follows: This invention is a pioneering invention, proposing a protection method for a fan oscillation mechanism. After the fan is placed on-site and powered on, the controller collects the one-way oscillation time taken for the oscillation base to swing from one extreme position to another under normal working conditions. That is, this one-way oscillation time is the time collected on-site after the fan is placed, based on actual needs and with the oscillation angle already determined, and is not a preset time. Then, the controller collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, it indicates that the oscillation base has a certain delay in swinging from one extreme position and has not yet reached the other extreme limit. In this case, the corresponding position switch must have malfunctioned and cannot provide feedback. Considering normal error fluctuations, such as voltage fluctuations causing fluctuations in the fan oscillation speed, there can be at least a 1-second delay. At the same time, to avoid excessive delay that could damage the oscillation motor, there can be a maximum delay of 3 seconds. The controller then controls the oscillation motor to stop, thereby preventing fan malfunction. If the value does not exceed the above, the oscillation motor works normally.

[0009] Furthermore, after the fan is powered on, the controller collects the first single-cycle oscillation time under normal operating conditions of the oscillation unit, and then compares the current oscillation time with the first single-cycle oscillation time.

[0010] Furthermore, before collecting the first single-trip sway time, the controller first clears all the data previously recorded by the controller through the reset switch on the controller, and then starts collecting data.

[0011] Furthermore, after the fan is powered on, the controller continuously collects the single-cycle oscillation time of each oscillation under normal operating conditions, and then compares the current oscillation time with the most recent single-cycle oscillation time.

[0012] To achieve the above objectives, the controller for the fan oscillation mechanism in this invention adopts the following technical solution: A controller for a fan oscillation mechanism executes instructions to achieve the following: after the fan is placed on site and powered on, the controller collects the one-way oscillation time taken for the oscillation base to swing from one extreme position to another under normal operating conditions. Then, the controller collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If the difference does not exceed the value, the oscillation motor operates normally.

[0013] The beneficial effects of the above technical solution are as follows: This invention is a pioneering invention, proposing a controller for a fan oscillation mechanism. The controller executes instructions to achieve the following: After the fan is placed on-site and powered on, the controller collects the one-way oscillation time taken for the oscillation base to swing from one extreme position to another under normal working conditions. That is, the one-way oscillation time is the time collected on-site after the fan is placed, based on actual on-site needs, and with the oscillation angle already determined, and is not a preset time. Then, the controller collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, it indicates that the oscillation base has a certain delay in swinging from one extreme position and has not yet reached the other extreme limit. In this case, the corresponding position switch must have malfunctioned and cannot provide feedback. Considering normal error fluctuations, such as voltage fluctuations causing fluctuations in the fan oscillation speed, there can be at least a 1-second delay. At the same time, to avoid the oscillation motor from being damaged due to excessive delay, there can be a maximum delay of 3 seconds. The controller then controls the oscillation motor to stop, thereby preventing fan malfunction. If the above value is not exceeded, the oscillation motor works normally.

[0014] Furthermore, after the fan is powered on, the controller collects the first single-cycle oscillation time under normal operating conditions of the oscillation unit, and then compares the current oscillation time with the first single-cycle oscillation time.

[0015] Furthermore, before collecting the first single-trip sway time, the controller first clears all the data previously recorded by the controller through the reset switch on the controller, and then starts collecting data.

[0016] Furthermore, after the fan is powered on, the controller continuously collects the single-cycle oscillation time of each oscillation under normal operating conditions, and then compares the current oscillation time with the most recent single-cycle oscillation time.

[0017] To achieve the above objectives, the fan in this invention adopts the following technical solution: A fan includes a fan head and a fan oscillation mechanism connected to the fan head. The fan oscillation mechanism includes an oscillation base, an oscillation motor for driving the oscillation base to oscillate back and forth, and a position switch and controller for controlling the forward and reverse rotation of the oscillation motor. The controller executes instructions to achieve the following method: after the fan is placed on site and powered on, the controller collects the one-way oscillation time taken for the oscillation base to oscillate from one extreme position to another under normal working conditions. Then, the controller collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If the difference does not exceed the value, the oscillation motor operates normally.

[0018] The beneficial effects of the above technical solution are as follows: This invention is an improved invention. The controller executes the following instructions: After the fan is placed on-site and powered on, the controller collects the one-way oscillation time taken for the oscillating seat to swing from one extreme position to another under normal operating conditions. That is, the one-way oscillation time is the time collected on-site after the fan is placed on-site, based on actual needs, and with the oscillation angle already determined, and is not a preset time. Then, the controller collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, it indicates that the oscillating seat has a certain delay in swinging from one extreme position and has not yet reached the other extreme limit. In this case, the corresponding position switch must have malfunctioned and cannot provide feedback. Considering normal error fluctuations, such as voltage fluctuations causing fluctuations in the fan's oscillation speed, there can be at least a 1-second delay. At the same time, to avoid excessive delay time causing the oscillation motor to stall, there can be a maximum delay of 3 seconds. The controller then controls the oscillation motor to stop, thereby preventing fan malfunction. If the above value is not exceeded, the oscillation motor operates normally.

[0019] Furthermore, after the fan is powered on, the controller collects the first single-cycle oscillation time under normal operating conditions of the oscillation unit, and then compares the current oscillation time with the first single-cycle oscillation time.

[0020] Furthermore, before collecting the first single-trip sway time, the controller first clears all the data previously recorded by the controller through the reset switch on the controller, and then starts collecting data.

[0021] Furthermore, after the fan is powered on, the controller continuously collects the single-cycle oscillation time of each oscillation under normal operating conditions, and then compares the current oscillation time with the most recent single-cycle oscillation time.

[0022] Furthermore, the oscillating base is provided with a mounting plate; there is only one mounting plate and two position switches are mounted on the mounting plate, or there are two mounting plates and one position switch is mounted on each mounting plate; the mounting plate has a stop part for cooperating with the corresponding trigger structure to stop the oscillating base from continuing to oscillate when the corresponding position switch fails. Attached Figure Description

[0023] Figure 1 This is a perspective view of embodiment 1 of the fan of the present invention; Figure 2 This is a partial cross-sectional view of embodiment 1 of the fan of the present invention; Figure 3 This is a perspective view of the oscillating mechanism in embodiment 1 of the fan of the present invention; Figure 4 This is a perspective view of the oscillating mechanism in embodiment 1 of the fan of the present invention from another angle; Figure 5 This is a cross-sectional view of the oscillating mechanism in embodiment 1 of the fan of the present invention; Figure 6 This is a perspective view of embodiment 2 of the fan of the present invention; Figure 7 This is a partial structural diagram of the fan in embodiment 2 of the present invention.

[0024] In the diagram: 1. Pile; 2. Fan head; 21. Fan housing; 22. Fan blade; 3. Mounting base; 31. Center plate; 311. Mounting hole; 32. Arc-shaped plate; 321. First threaded hole; 322. Second threaded hole; 323. Mounting hole; 33. Internal gear ring; 4. Oscillating base; 41. Vertical plate; 42. Base plate; 421. Mounting plate; 43. Top plate; 431. Connecting hole; 5. Gear motor; 6. Transmission block; 7. Transmission shaft; 8. Bearing; 9. Lower clamping nut; 10. Upper clamping nut; 11. First bolt; 12. Second bolt; 13. First micro switch; 14. Second micro switch; 15. Support base; 16. Control main board; 17. Oscillating box; 18. Connecting arm. Detailed Implementation

[0025] To address the technical problems existing in the prior art, the basic concept of this invention is to capture the one-way oscillation time taken by the oscillating seat to swing from one extreme position to another under normal working conditions on-site, and then compare the current oscillation time with the one-way oscillation time. When the difference between the two exceeds a certain value, it indicates that the corresponding position switch has malfunctioned. At this time, the controller controls the oscillating motor to stop to avoid fan failure.

[0026] The features and performance of the present invention will be further described in detail below with reference to embodiments.

[0027] Embodiment 1 of the fan in this invention: like Figure 1 As shown, the fan in this embodiment is a single-head cooling mist fan, including a post 1 and a fan head 2. The post 1 is cylindrical and used to fix it to the ground. The fan head 2 is located at the top of the post 1, as shown... Figure 2 As shown, the device includes a fan housing 21, fan blades 22 installed inside the fan housing 21, a rotary motor that controls the rotation of the fan blades 22, and an atomizing device. During operation, purified water is drawn in by the pump unit and generates water under stable pressure. This water is transported to the atomizing device through a pipeline, and the water is sprayed out through a nozzle with an extremely fine aperture. Depending on the nozzle aperture, micro-mist particles ranging from 5 to 50 micrometers can be generated. These micro-mist particles are sprayed while blowing air under the action of the fan blades and the rotary motor.

[0028] A fan oscillation mechanism is installed between the fan head 2 and the post 1. This mechanism controls the fan head 2 to oscillate within a certain angle range, thus allowing the fan to have a certain radiation range. Specifically... Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the fan oscillation mechanism includes a fixed base 3, an oscillation seat 4 rotatably mounted on the fixed base 3, and a drive device for driving the oscillation seat 4 to oscillate relative to the fixed base 3. The fixed base 3 is fixedly connected to the top of the pile 1. Specifically, the fixed base 3 is located in the inner hole at the top of the pile 1. Multiple fixing holes 323 are provided at intervals on the outer circumferential surface of the fixed base 3. The fixing holes 323 are threaded holes. By passing screws through the pile 1 and connecting them to the fixing holes 323, the fixing between the fixed base 3 and the pile 1 can be achieved.

[0029] The oscillation axis of the oscillation base 4 extends vertically. The oscillation base 4 includes an arc-shaped upright plate 41. A bottom plate 42 is fixed to the bottom of the upright plate 41, and a top plate 43 is fixed to the top. The top plate 43 is provided with a connection hole 431 for fixed connection with the fan housing 21. The fan housing 21 is provided with a corresponding connection hole. Thus, the fan housing 21 can be fixed to the top plate 43 of the oscillation base 4 by screws, so that the fan housing 21, fan blades 22, rotating motor and atomizing device can rotate together with the oscillation base 4.

[0030] Specifically, the upright plate 41 is made by cutting a round tube. The upright plate 41 is welded and fixed to the base plate 42. In order to ensure the reliability of the fixation, a complete ring is retained at one end during the process of cutting the round tube in half. The ring is welded and fixed to the base plate 42, which increases the fixation area.

[0031] The base plate 42 is rotatably mounted on the fixed base 3. Specifically, the driving device is a geared motor 5 (i.e., an oscillating motor that realizes fan oscillation). The geared motor 5 is fixed on the fixed base 3, and the main body of the geared motor 5 is located below the fixed base 3. The output shaft of the geared motor 5 is driven by a transmission shaft 7, so the geared motor 5 can drive the transmission shaft 7 to rotate. A bearing 8 is installed between the transmission shaft 7 and the fixed base 3 to ensure rotational stability. The transmission shaft 7 is provided with a support surface for supporting the base plate 42. The transmission shaft 7 also has a through end that passes through the base plate 42. The through end is provided with an external thread and is connected to an upper clamping nut 10 for pressing the base plate 42, thereby achieving relative fixation between the oscillating seat 4 and the transmission shaft 7. When the transmission shaft 7 rotates, it can drive the oscillating seat 4 to rotate together. Since the upright plate 41 is arc-shaped, it forms an open structure, which facilitates the installation operation of the upper clamping nut 10.

[0032] Furthermore, the lower end of the drive shaft 7 is provided with an inner hole, and a drive block 6 is welded and fixed in the inner hole. The drive block 6 has an anti-rotation hole (a non-circular irregular hole) that cooperates with the output shaft of the geared motor 5 to prevent rotation. Therefore, the output torque of the geared motor 5 is transmitted to the drive shaft 7 through the drive block 6, and the geared motor 5 and the drive shaft 7 are indirectly connected by transmission.

[0033] Furthermore, bearing 8 is a deep groove ball bearing, capable of withstanding a certain axial load, better supporting the weight of drive shaft 7, oscillating seat 4, and fan head 2. In other embodiments, bearing 8 can also be a thrust bearing or angular contact ball bearing. A collar is provided in the middle of drive shaft 7, the upper end face of the collar forming the aforementioned support surface, and the lower end face of the collar pressing against the inner ring of bearing 8. Both the upper and lower parts of the collar are provided with external threads. The upper external thread connects to the aforementioned upper clamping nut 10, and the lower external thread connects to the lower clamping nut 9. The lower clamping nut 9 clamps the inner ring of bearing 8. The upper clamping nut 10 and the lower clamping nut 9 work together to achieve relative fixation of the inner ring of bearing 8, drive shaft 7, and base plate 42. The outer ring of bearing 8 is interference-fitted onto fixed seat 3, and fixed seat 3 is provided with corresponding stepped holes.

[0034] The fan oscillation mechanism also includes a position switch and a controller for controlling the forward and reverse rotation of the geared motor 5. The position switch is equipped with a trigger structure, which is a separately installed trigger element. The trigger element is used to activate the position switch when the oscillation base 4 rotates to a set position. The position switch feeds back a signal to the controller, which then controls the geared motor 5 to output a reverse rotation action. One of the fixed base 3 and the oscillation base 4 is provided with a position switch mounting position, and the other is provided with a trigger element mounting position. Two trigger element mounting positions that define the same oscillation range form a group. There are two or more groups of trigger element mounting positions to define different oscillation angles. The trigger element mounting positions are provided with a detachable mounting structure. Since the trigger element is detachable and there are two or more groups of trigger element mounting positions, mounting it in different positions can give the oscillation base different oscillation angles, thus allowing the appropriate oscillation range to be determined according to different usage scenarios, making it more flexible in use.

[0035] Specifically, in this embodiment, the trigger mounting position is set on the fixed base 3, and the position switch mounting position is set on the oscillating base 4. There are two position switches, namely a first micro switch 13 and a second micro switch 14, which are arranged on the outer periphery of the upright plate 41. At the same time, there are also two triggers, which are located at the two ends of the rotation stroke of the two micro switches respectively. When the first micro switch 13 rotates to one end of its stroke, the first micro switch 13 can be triggered by the trigger, and feeds a signal to the controller. Then the controller controls the reduction motor 5 to output a reverse action, and the oscillating base 4 begins to reverse. When the second micro switch 14 reverses to the other end of its stroke, the second micro switch 14 is triggered, and feeds a signal to the controller. The controller controls the reduction motor 5 to output a reverse action again, and the oscillating base 4 reverses again. This process is repeated to realize the reciprocating oscillation of the fan head 2.

[0036] Specifically, the main body of the base plate 42 is a circular ring plate, and a rectangular mounting plate 421 is integrally connected to the circular ring plate. The mounting plate 421 extends to one side of the outer periphery of the upright plate 41. The first micro switch 13 is fixed on the lower surface of the mounting plate 421, and the second micro switch 14 is fixed on the upper surface of the mounting plate 421. That is, in this embodiment, there is only one mounting plate 421. The mounting plate 421 is provided with two position switch mounting positions. The two position switches are fixed on the mounting plate 421 along the swing axis of the rocker arm 4, which is equivalent to stacking them one on top of the other. Of course, in order to ensure that both micro switches can be triggered, the contacts of the two micro switches are not on the same side. One contact extends outward to one side in the circumferential direction, and the other contact extends outward to the other side in the circumferential direction.

[0037] The two triggers are the first bolt 11 and the second bolt 12. Corresponding to the first bolt 11, the fixed seat 3 is provided with three (in other embodiments, two or more) first threaded holes 321 arranged at intervals around the swing axis of the swaying seat 4. The shank of the first bolt 11 is a threaded rod with threads on the outside. The threaded rod can be connected to any of the first threaded holes 321. The position of each first threaded hole 321 constitutes a trigger mounting position. The first bolt 11 has three trigger mounting positions. At the same time, the first threaded hole 321 itself constitutes a detachable trigger mounting structure.

[0038] Corresponding to the second bolt 12, the fixed seat 3 is provided with three (in other embodiments, two or more) second threaded holes 322 arranged at intervals around the swing axis of the swaying seat 4. Similarly, the shank of the second bolt 12 is a threaded rod with threads on the outside. The threaded rod can be connected to any of the second threaded holes 322. The position of each second threaded hole 322 constitutes a trigger mounting position. The second bolt 12 also has three trigger mounting positions. At the same time, the second threaded hole 322 itself constitutes a detachable trigger mounting structure.

[0039] When the oscillating base 4 rotates, it drives the two microswitches to rotate together. Assuming that the two microswitches rotate in the direction of the first bolt 11, the contact of the first microswitch 13 eventually contacts the first bolt 11, triggering the first microswitch 13 and sending a signal to the controller. The controller controls the geared motor 5 to reverse according to the feedback signal, causing the two microswitches to rotate in the direction of the second bolt 12. Eventually, the contact of the second microswitch 14 contacts the second bolt 12, triggering the second microswitch 14 and sending a signal to the controller. The controller then controls the geared motor 5 to reverse again according to the feedback signal, and so on, to achieve the reciprocating oscillation of the fan head 2.

[0040] Three first threaded holes 321 and three second threaded holes 322 are arranged at intervals on the same circumference, that is, six trigger mounting positions are arranged at intervals on the same circumference. One first threaded hole 321 and one second threaded hole 322 form a group. When the first bolt 11 is installed in different first threaded holes 321 and the second bolt 12 is installed in different second threaded holes 322, a total of nine groups of trigger mounting positions can be formed. However, since the three first threaded holes 321 and the three second threaded holes 322 are arranged at equal intervals, the swaying angle of three of the nine groups of trigger mounting positions is the same as that of the other groups. There are a total of six different swaying angles. Of course, if the three first threaded holes 321 or the three second threaded holes 322 are not arranged at equal intervals, a maximum of nine different swaying angles can be defined.

[0041] That is, when the first bolt 11 and / or the second bolt 12 are installed in different threaded holes, the timing of the triggering of the first micro switch 13 and / or the second micro switch 14 can be changed, thereby changing the swing angle range of the oscillating seat 4 and realizing the adjustment of the radiation range of the fan head 2.

[0042] Typically, when a fan is installed on-site, its oscillation angle is determined based on the actual needs of the site. That is, during the on-site installation phase and before normal use, the first bolt 11 and the second bolt 12 are installed into suitable threaded holes according to the actual site conditions to determine the fan's oscillation angle. This oscillation angle remains unchanged during subsequent use. Therefore, fans installed in different application scenarios generally have different oscillation angles, and it is impossible to pre-set a uniform single-cycle oscillation time (the time it takes for the oscillating unit to swing from one extreme position to another) for every fan leaving the factory.

[0043] During fan operation, if a microswitch malfunctions, it will no longer be able to send a signal to the controller. Consequently, the controller cannot properly control the oscillating arm 4 to reverse. The geared motor 5 continues to output torque in one direction, causing the trigger to bend or break the microswitch's contact. To prevent the oscillating arm 4 from exceeding the trigger and continuing to rotate, which could lead to the wires connected to the motor being broken, the mounting plate 421 in this embodiment has a stop portion that engages with the corresponding trigger to prevent the oscillating arm 4 from continuing to oscillate when the corresponding microswitch malfunctions. The stop portion is the end of the mounting plate 421. Under normal circumstances, the microswitch is triggered when its contact is pressed and rotated a certain angle, causing the oscillating arm 4 to reverse. If the microswitch malfunctions and cannot send a signal, the contact will be continuously pressed. When the contact rotates to its limit position, or deforms further after reaching its limit position, the stop portion of the mounting plate 421 can engage with the trigger to prevent the oscillating arm 4 from continuing to oscillate.

[0044] After the stop part of the mounting plate 421 is engaged with the trigger stop, in order to prevent the geared motor 5 from being damaged, the controller also executes the following instructions: After the fan is placed on site and powered on, the controller collects the one-way oscillation time taken for the oscillating seat 4 to swing from one extreme position to another under normal working conditions. Then the controller collects the current oscillation time and compares the current oscillation time with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If it does not exceed the value, the oscillation motor works normally.

[0045] In other words, the aforementioned single-trip oscillation time is the time collected on-site after the fan is installed, based on actual needs and with the oscillation angle already determined. It is not a preset time, thus solving the problem of not being able to preset a uniform single-trip oscillation time for every fan leaving the factory. The controller then collects the current oscillation time and compares it with the single-trip oscillation time. If the difference between the current oscillation time and the single-trip oscillation time exceeds a value between 1 and 3 seconds, it indicates that the oscillating unit has started oscillating from one extreme position with a certain delay before reaching another limit. In this case, the corresponding microswitch must be faulty and unable to provide feedback. Considering normal error fluctuations, such as voltage fluctuations causing fluctuations in fan oscillation speed, a minimum delay of 1 second is acceptable. However, to avoid excessive delays that could damage the oscillation motor, a maximum delay of 3 seconds is allowed. The controller then stops the oscillation motor to prevent fan malfunction. If the value does not exceed the above limits, the oscillation motor operates normally.

[0046] Furthermore, after the fan is powered on, the controller collects the first single-stroke oscillation time under normal working conditions of the oscillating bracket 4. Then, the current oscillation time is compared with the first single-stroke oscillation time. During normal operation, the difference between the first single-stroke oscillation time and the subsequent single-stroke oscillation times of the oscillating bracket 4 is not significant and is within the considered error fluctuation range. Therefore, it is only necessary to collect the first single-stroke oscillation time, which is more convenient.

[0047] Furthermore, some fans undergo testing before leaving the factory. During testing, the trigger element is installed in different positions to test whether each oscillation angle can operate normally. Since the controller's program instructions are already set, the controller records the single-stroke oscillation time generated during the test. To ensure that the oscillation angle determined on-site corresponds to the first collected single-stroke oscillation time during field deployment, a reset switch is installed on the controller. Before collecting the first single-stroke oscillation time, the controller first clears all previously recorded data using the reset switch before starting the data collection.

[0048] In addition, in this embodiment, the controller and the microswitches are simultaneously arranged on the rocker arm 4, enabling the controller and the two microswitches to rotate together. This keeps the wires connecting the controller and the two microswitches relatively stationary, ensuring stability during use. Specifically, a support base 15 is fixedly provided on the outer periphery of the upright plate 41, and a control motherboard 16 is mounted on the support base 15. The controller is a chip mounted on the control motherboard 16, which can be a microcontroller, FPGA, DSP, MCU, or other types of chips. In other embodiments, the controller can also be an independent PLC.

[0049] In addition, the fixing base 3 in this embodiment is plate-shaped, including a central plate 31 and an arc-shaped plate 32 located around the central plate 31 and in a semi-circular arc shape. The outer peripheral surface of the arc-shaped plate 32 is concentric with the outer peripheral surface of the upright plate 41. The fixing hole 323 is provided on the outer peripheral surface of the arc-shaped plate 32, and the axis of the fixing hole 323 extends radially along the arc-shaped plate 32. The first threaded hole 321 and the second threaded hole 322 are both provided on the arc-shaped plate 32, and their axes extend in the vertical direction. That is, the two triggering elements—the first bolt 11 and the second bolt 12—are both installed on the arc-shaped plate 32. In addition, the side of the central plate 31 facing away from the arc-shaped plate 32 is provided with a mounting structure for mounting the wire harness board. In this embodiment, the mounting structure is specifically a mounting hole 311, which is a threaded hole, so that the wire harness board is fixed to the central plate 31 by screws and the wire harness is pressed onto the central plate 31. The wire harness runs from the side of the central plate 31 facing away from the arc-shaped plate 32, making the structure more compact.

[0050] Embodiment 2 of the fan in this invention: like Figure 6 As shown, the fan in this embodiment is a dual-head cold fog fan, which also includes a post 1. The top of the post 1 is connected to two fan heads 2 through a fan oscillation mechanism. The fan oscillation mechanism can control the two fan heads 2 to oscillate simultaneously.

[0051] Combination Figure 6 and Figure 7 As shown, the fan oscillation mechanism includes an oscillation box 17 and connecting arms 18 connected to both sides of the oscillation box 17. Each connecting arm 18 is connected to a fan head 2. The fan oscillation mechanism also includes a fixed base 3, an oscillation seat 4 rotatably mounted on the fixed base 3, and a drive device for driving the oscillation seat 4 to rotate. The fixed base 3 is fixedly connected to the post 1. The drive device includes a geared motor 5 (i.e., an oscillation motor that realizes fan oscillation) and a drive gear (not shown in the figure) mounted on the output end of the geared motor 5. An internal gear ring 33 is provided on the fixed base 3. The drive gear meshes with the internal gear ring 33. When the geared motor 5 controls the drive gear to rotate, the oscillation seat 4 can be driven to rotate under the meshing action of the drive gear and the internal gear ring 33. That is, the geared motor 5 in this embodiment is a follower motor.

[0052] Furthermore, the oscillating base 4 includes two mounting plates 421 spaced apart around the oscillation axis of the oscillating base 4. Each mounting plate 421 has a position switch mounting position, meaning that each of the two mounting plates 421 has a position switch installed. The two position switches are a first micro switch 13 and a second micro switch 14, which rotate together with the oscillating base 4. The fixed base 3 is equipped with a first bolt 11 and a second bolt 12, and a plurality of first threaded holes 321 are provided corresponding to the first bolt 11. Each first threaded hole 321 forms a trigger mounting position, and the first threaded hole 321 itself is a detachable trigger mounting structure. A plurality of second threaded holes 322 are provided corresponding to the second bolt 12, and each second threaded hole 322 forms a trigger mounting position, and the second threaded hole 322 itself is a detachable trigger mounting structure. The oscillation angle can be adjusted by adjusting the positions of the first bolt 11 and the second bolt 12.

[0053] The fan oscillation mechanism in this embodiment also includes a controller. The controller can be a chip installed on the control motherboard, such as a microcontroller, FPGA, DSP, MCU, etc., or it can be an independent PLC. During the process of the geared motor 5 driving the fan to oscillate, two microswitches follow and are triggered by the corresponding bolts at the end of their stroke. For example, when the two microswitches rotate toward the first bolt 11, the contact of the first microswitch 13 finally contacts the first bolt 11, and the first microswitch 13 is triggered, thereby sending a signal to the controller. The controller controls the geared motor 5 to reverse according to the feedback signal, so that the two microswitches rotate toward the second bolt 12. Finally, the contact of the second microswitch 14 contacts the second bolt 12, and the second microswitch 14 is triggered, thereby sending a signal to the controller. The controller controls the geared motor 5 to reverse again according to the feedback signal, and so on, to realize the reciprocating oscillation of the fan head 2.

[0054] During use, when a microswitch malfunctions, it can no longer send a signal to the controller. The controller then cannot properly control the oscillating seat 4 to reverse. The geared motor 5 continues to output torque in one direction, causing the bolt to bend or break the microswitch's contact. To prevent the oscillating seat 4 from continuing to rotate past the bolt and thus breaking the wires connected to the motor, each mounting plate 421 in this embodiment has a stop portion that engages with the corresponding bolt to prevent the oscillating seat 4 from continuing to swing when the corresponding microswitch malfunctions. The stop portion is the end of the mounting plate 421. Under normal circumstances, the microswitch is triggered when its contact is pressed and rotated a certain angle, causing the oscillating seat 4 to reverse. If the microswitch malfunctions and cannot send a signal, the contact will be continuously pressed. When the contact rotates to its limit position, or deforms after reaching its limit position, the stop portion of the mounting plate 421 can engage with the bolt to prevent the oscillating seat 4 from continuing to swing.

[0055] After the stop part of the mounting plate 421 is engaged with the bolt stop, in order to prevent the geared motor 5 from being damaged, the controller also executes the following instructions: After the fan is placed on site and powered on, the controller collects the one-way oscillation time taken for the oscillating seat 4 to swing from one extreme position to another under normal working conditions. Then the controller collects the current oscillation time and compares the current oscillation time with the single-way oscillation time. If the difference between the current oscillation time and the single-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If it does not exceed the value, the oscillation motor works normally.

[0056] Similar to Example 1, the single-trip oscillation time in this example is also collected on-site after the fan is installed, based on actual needs and with the oscillation angle already determined. This time is not a preset time, thus solving the problem of not being able to preset a uniform single-trip oscillation time for every fan leaving the factory. The controller then collects the current oscillation time and compares it with the single-trip oscillation time. If the difference between the current oscillation time and the single-trip oscillation time exceeds a value between 1 and 3 seconds, it indicates that the oscillating unit has started oscillating from one extreme position with a certain delay before reaching another limit. In this case, the corresponding microswitch must be faulty and unable to provide feedback. Considering normal error fluctuations, such as voltage fluctuations causing fluctuations in fan oscillation speed, a minimum delay of 1 second is acceptable. To avoid excessive delays that could damage the oscillation motor, a maximum delay of 3 seconds is allowed. The controller then stops the oscillation motor to prevent fan malfunction. If the value does not exceed the above limits, the oscillation motor operates normally.

[0057] Furthermore, after the fan is powered on, the controller collects the first single-stroke oscillation time under normal working conditions of the oscillating bracket 4. Then, the current oscillation time is compared with the first single-stroke oscillation time. During normal operation, the difference between the first single-stroke oscillation time and the subsequent single-stroke oscillation times of the oscillating bracket 4 is not significant and is within the considered error fluctuation range. Therefore, it is only necessary to collect the first single-stroke oscillation time, which is more convenient.

[0058] Furthermore, since the fan is typically tested before leaving the factory, the trigger element needs to be installed in different positions to test whether it can operate normally at various oscillation angles. During this process, because the controller's program instructions have been set, the controller will record the single-stroke oscillation time generated during the test. To ensure that the oscillation angle determined on-site corresponds to the first single-stroke oscillation time collected during field deployment, a reset switch is installed on the controller. Before collecting the first single-stroke oscillation time, the controller first clears all previously recorded data by using the reset switch on the controller, and then begins data collection.

[0059] In other embodiments of the fan: the data recorded by the controller is cleared when the fan leaves the factory, so there is no need to operate the reset switch to clear it at the installation site. Or, the controller's setting program has been tested multiple times before the fan leaves the factory and there are no problems. At the same time, the position switches are all brand new and have no quality problems. There is no need to test various oscillation angles for each fan. In this case, the controller does not record any single-trip oscillation time. There is no need to reset it during on-site installation. The first single-trip oscillation time can be directly collected.

[0060] In other embodiments of the fan: After the fan is placed on site and powered on, the controller continuously collects the single-trip oscillation time of each time under normal working conditions of the oscillation base, and then compares the current oscillation time with the most recent single-trip oscillation time. The comparison rules are the same as in Embodiment 1 and Embodiment 2. Since the comparison is of the most recent single-trip oscillation time, there is no need to set a reset switch to clear it under this control method.

[0061] In other embodiments of the fan: the micro switch can be replaced with a direct-acting limit switch or a roller limit switch, or a non-contact proximity switch can be used instead of a limit switch.

[0062] In other embodiments of the fan: the trigger element can also be a screw or stud, or it can be a welded trigger rod, which can be a smooth rod, or it can be a welded trigger block. In other embodiments, the trigger structure can also be integrally formed on the mounting base, instead of being a separate fixed component.

[0063] In other embodiments of the fan: the limit switch can also be mounted on a fixed base, in which case the triggering structure is set on the oscillating base. The triggering structure can be a bolt, screw or stud, or a trigger rod or trigger block, or a protrusion integrally formed on the oscillating base.

[0064] In other embodiments of the fan: the stop portion of the mounting plate may no longer be used to stop the engagement between the trigger and the limit switch. For example, when a direct-acting limit switch is used, the trigger abuts against the top rod of the limit switch, preventing further relative movement between the two. Alternatively, when a micro switch is used, a micro switch with a short contact overhang can be selected, or the contact position between the trigger and the micro switch contact can be slightly away from the end, so that after the contact is fully pressed down, the micro switch itself prevents the oscillating base from rotating further.

[0065] In other embodiments of the fan: when a proximity switch is used as a position switch, since the proximity switch and the triggering structure do not contact each other, when the proximity switch fails, the oscillating seat will not stop when it reaches the position of the triggering structure, but will continue to rotate. To prevent the wire from being broken, a baffle can also be connected to the mounting plate. At this time, the baffle is located behind the corresponding proximity switch rotation direction. If the proximity switch works normally, it can send a signal when it reaches the position of the triggering structure, and then the oscillating seat will reverse. If the proximity switch fails, the oscillating seat only needs to rotate a little more before the baffle can block the triggering structure and prevent the oscillating seat from continuing to swing.

[0066] In other embodiments of the fan: the fan may also be a regular fan that can only blow air.

[0067] The embodiment of the controller for the fan oscillation mechanism in this invention is as follows: the controller for the fan oscillation mechanism is the same as the controller for the fan oscillation mechanism in any of the above-described fan embodiments, and will not be repeated here.

[0068] An embodiment of the protection method for the fan oscillation mechanism in this invention is as follows: After the fan is installed on site and powered on, the controller collects the one-way oscillation time taken for the oscillating unit to swing from one extreme position to another under normal operating conditions. The controller then collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If the difference does not exceed the value, the oscillation motor operates normally.

[0069] In the protection method of this invention, the single-trip oscillation time is the time collected on-site after the fan is installed, based on actual on-site needs, with the oscillation angle already determined. This time is not a preset time, thus solving the problem of not being able to preset a uniform single-trip oscillation time for every fan leaving the factory. The controller then collects the current oscillation time and compares it with the single-trip oscillation time. If the difference between the current oscillation time and the single-trip oscillation time exceeds a value between 1 and 3 seconds, it indicates that the oscillating base has started oscillating from one extreme position with a certain delay before reaching another limit. In this case, the corresponding microswitch must be faulty and unable to provide feedback. Considering normal error fluctuations, such as voltage fluctuations causing fluctuations in the fan's oscillation speed, a delay of at least 1 second is acceptable. To avoid excessive delay that could damage the oscillation motor, a delay of up to 3 seconds is allowed. The controller then stops the oscillation motor to prevent fan malfunction. If the value does not exceed the above limits, the oscillation motor operates normally.

[0070] Furthermore, after the fan is powered on, the controller collects the first single-stroke oscillation time under normal operating conditions. Then, the current oscillation time is compared with the first single-stroke oscillation time. During normal operation, the difference between the first single-stroke oscillation time and the subsequent single-stroke oscillation times is not significant and are within the considered error fluctuation range. Therefore, it is more convenient to collect only the first single-stroke oscillation time.

[0071] Furthermore, some fans undergo testing before leaving the factory. During testing, the trigger element is installed in different positions to test whether each oscillation angle can operate normally. Since the controller's program instructions are already set, the controller records the single-stroke oscillation time generated during the test. To ensure that the oscillation angle determined on-site corresponds to the first collected single-stroke oscillation time during field deployment, a reset switch is installed on the controller. Before collecting the first single-stroke oscillation time, the controller first clears all previously recorded data using the reset switch before starting the data collection.

[0072] In other embodiments of the protection method for the fan oscillation mechanism: the data recorded by the controller is cleared when the fan leaves the factory, so there is no need to operate the reset switch to clear it at the installation site. Alternatively, the controller's setting program has been tested multiple times before the fan leaves the factory and there are no problems. At the same time, the position switches are all brand new and have no quality problems. There is no need to test various oscillation angles for each fan. In this case, the controller does not record any single-trip oscillation time. There is no need to reset it during on-site installation. The first single-trip oscillation time can be directly collected.

[0073] In other embodiments of the protection method for the fan oscillation mechanism: after the fan is placed on site and powered on, the controller continuously collects the single-trip oscillation time of each time under normal working conditions of the oscillation seat, and then compares the current oscillation time with the most recent single-trip oscillation time. The comparison rules are the same as in Embodiment 1 and Embodiment 2. Since the comparison is of the most recent single-trip oscillation time, there is no need to set a reset switch to clear the zero in this control method.

[0074] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present invention shall also be included within the scope of protection of the present invention.

Claims

1. A method for protecting a fan oscillation mechanism, characterized in that, After the fan is installed on site and powered on, the controller collects the one-way oscillation time taken for the oscillating unit to swing from one extreme position to another under normal operating conditions. The controller then collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If the difference does not exceed the value, the oscillation motor operates normally.

2. The protection method for the fan oscillation mechanism according to claim 1, characterized in that, After the fan is powered on, the controller collects the first single-cycle oscillation time under normal operating conditions of the oscillation base, and then compares the current oscillation time with the first single-cycle oscillation time.

3. The protection method for the fan oscillation mechanism according to claim 2, characterized in that, Before collecting the first single-trip oscillation time, the controller first clears all previously recorded data by using the reset switch on the controller, and then starts collecting data.

4. The protection method for the fan oscillation mechanism according to claim 1, characterized in that, After the fan is powered on, the controller continuously collects the single-cycle oscillation time of the oscillating unit under normal working conditions, and then compares the current oscillation time with the most recent single-cycle oscillation time.

5. A controller for a fan oscillation mechanism, characterized in that, The controller executes instructions to achieve the following: After the fan is placed on site and powered on, the controller collects the one-way oscillation time taken for the oscillating unit to swing from one extreme position to another under normal operating conditions. Then, the controller collects the current oscillation time and compares it with the one-way oscillation time. If the difference between the current oscillation time and the one-way oscillation time exceeds a value between 1 and 3 seconds, the controller controls the oscillation motor to stop. If it does not exceed the value, the oscillation motor operates normally.

6. The controller for the fan oscillation mechanism according to claim 5, characterized in that, After the fan is powered on, the controller collects the first single-cycle oscillation time under normal operating conditions of the oscillation base, and then compares the current oscillation time with the first single-cycle oscillation time.

7. The controller for the fan oscillation mechanism according to claim 6, characterized in that, Before collecting the first single-trip oscillation time, the controller first clears all previously recorded data by using the reset switch on the controller, and then starts collecting data.

8. The controller for the fan oscillation mechanism according to claim 5, characterized in that, After the fan is powered on, the controller continuously collects the single-cycle oscillation time of the oscillating unit under normal working conditions, and then compares the current oscillation time with the most recent single-cycle oscillation time.

9. A fan, comprising a fan head and a fan oscillation mechanism connected to the fan head, the fan oscillation mechanism comprising an oscillation base, an oscillation motor for driving the oscillation base to oscillate reciprocally, and a position switch and controller for controlling the forward and reverse rotation of the oscillation motor, characterized in that, The controller is the controller of the fan oscillation mechanism as described in any one of claims 5 to 8.

10. The fan according to claim 9, characterized in that, The oscillating base is provided with a mounting plate; there is only one mounting plate and two position switches are mounted on the mounting plate, or there are two mounting plates and one position switch is mounted on each mounting plate; the mounting plate has a stop part for cooperating with the corresponding trigger structure to stop the oscillating base from continuing to oscillate when the corresponding position switch fails.

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