A home elevator

Abstract

An embodiment of the present application provides a home elevator, which includes: an up switch changes the state of the up switch based on the triggering of the up button of the home elevator. The PLC is used to control the frequency converter through the first relay to make the motor rotate in the first direction based on the change of the up switch state, thereby starting the ascending process of the home elevator. The down switch changes the state of the down switch based on the triggering of the down button of the home elevator. The PLC is used to control the frequency converter through the second relay to make the motor rotate in the second direction based on the change of the down switch state, thereby starting the ascending process of the home elevator. The frequency converter controls the motor to stop rotating when the proximity switch and / or the time relay are disconnected. Through the above technical solution, the accuracy of elevator operation can be effectively improved and the user experience can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a household elevator. Background Art

[0002] An elevator is a permanent transportation device that serves several specific floors in a building and whose car runs on at least two rows of rigid tracks that are perpendicular to the horizontal plane or have an inclination angle of less than 15° to the plumb line.

[0003] With the innovation of technology and the development of society, a home elevator suitable for villa areas or small high-rise buildings has come into being, bringing great convenience to users' lives and allowing users to reach the designated floor safely and quickly.

[0004] During operation, existing home elevators are not precise enough and the elevator operation status is inaccurate, resulting in large errors. They often cannot accurately run to the target level, and there are also safety hazards in the use of home elevators. Summary of the invention

[0005] The embodiment of the present invention provides a home elevator, which can make the home elevator run safely and smoothly, thereby driving the user to reach the user's designated floor quickly and accurately, and solves the problems existing in the prior art.

[0006] The embodiment of the present application provides a home elevator, which includes: a programmable logic controller (PLC), an up switch, a down switch, a first relay, a second relay, a frequency converter, a motor, a proximity switch, and a time relay. The up switch is connected to the PLC, and the up switch changes the state of the up switch based on the triggering of the up button of the home elevator. One end of the first relay is connected to the PLC, and the other end is connected to the frequency converter, and the frequency converter is connected to the motor. The PLC is used to control the frequency converter through the first relay based on the change of the up switch state so that the motor rotates in the first direction, thereby starting the up process of the home elevator. The down switch is connected to the PLC, and the down switch changes the state of the down switch based on the triggering of the down button of the home elevator. One end of the second relay is connected to the PLC, and the other end is connected to the frequency converter. The PLC is used to control the frequency converter through the second relay based on the change of the down switch state so that the motor rotates in the second direction, thereby starting the down process of the home elevator. One end of the time relay is connected to the PLC, and the other end is connected to the frequency converter through the proximity switch. The frequency converter is used to control the motor to stop rotating when the proximity switch and / or the time relay are disconnected. The PLC is used to control the proximity switch to disconnect when the moving distance of the home elevator is equal to a preset threshold; and the PLC is also used to control the time relay to disconnect when the moving time of the home elevator is equal to a preset time.

[0007] In one possible implementation, the home elevator further includes: an encoder. The input end of the encoder is connected to the PLC, and the output end of the encoder is connected to the frequency converter. The PLC enables the encoder to obtain a corresponding encoding structure based on the signal from the speed change detection module of the home elevator, so that the frequency converter controls the speed of the motor according to the encoding result of the encoder, thereby starting the deceleration process of the home elevator. Among them, the speed change detection module includes a speed change detection member and a plurality of speed change actuators, the speed change detection member is arranged on the side wall of the car of the home elevator and close to the top of the car, each speed change actuator is arranged on the guide rail of the home elevator, and the distance between each speed change brake member and the corresponding leveling layer is the same, and each leveling layer corresponds to a speed change actuator. The shift actuator is used to trigger the speed change detection member when the speed change detection member reaches the position of the speed change actuator. The speed change detection member is used to send a corresponding signal to the PLC based on the trigger.

[0008] In a possible implementation, the home elevator further includes a light curtain switch and an emergency stop switch, both of which are connected to a PLC. When an abnormality is detected at the elevator door of the home elevator, the state of the light curtain switch changes, so that the PLC controls the motor to stop rotating. The emergency stop switch is used to change the state of the emergency stop switch based on the emergency stop button of the home elevator being triggered, so that the PLC controls the motor to stop rotating.

[0009] In a possible implementation, the elevator further includes an upper limit switch and a lower limit switch, both of which are connected to the PLC. The upper limit switch is used to change the state of the upper limit switch based on the triggering of the upper limit detection member, so that the PLC controls the motor to stop rotating, thereby stopping the ascending process of the home elevator. The lower limit switch changes the state of the upper limit switch based on the triggering of the lower limit detection member, so that the PLC controls the motor to stop rotating, thereby stopping the descending process of the home elevator.

[0010] In a possible implementation, the frequency converter is connected to the encoder via a PG card.

[0011] In a possible implementation manner, the first relay and the second relay form an interlocking circuit.

[0012] In a possible implementation, the home elevator further includes a third relay and a fourth relay, and the third relay and the fourth relay are respectively connected to the PLC. The PLC controls the lighting source of the elevator through the third relay. And the PLC controls the elevator to stop in an abnormal situation through the fourth relay. The PLC controls the elevator to send an alarm signal in an abnormal situation through the fifth relay.

[0013] In a possible implementation, the home elevator further includes a braking resistor, which is connected to the frequency converter. The braking resistor is used to cooperate with the fourth relay to realize the PLC control of the home elevator to stop in an abnormal situation.

[0014] The embodiment of the present application provides a home elevator, which cooperates with each other through an up switch, a down switch, a first relay, a second relay, a proximity switch, a time relay, a frequency converter, a PLC, and a motor. The PLC controls the frequency converter through the first relay or the second relay according to the state change of the up switch or the down switch, and adjusts the rotation direction of the motor by controlling the frequency converter, thereby realizing the up or down movement of the elevator. In addition, the PLC effectively reduces the errors existing in the operation of the elevator through the proximity switch and the time relay. Through the above technical solution, the accuracy and stability of the elevator operation are improved, and the user experience is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a circuit structure of a home elevator provided in an embodiment of the present application;

[0016] Figure 2 A schematic diagram of a partial circuit structure of a home elevator provided in an embodiment of the present application;

[0017] Figure 3 A schematic diagram of the structure of a home elevator provided in an embodiment of the present application;

[0018] Figure 4 A schematic diagram of the structure of a home elevator provided in an embodiment of the present application;

[0019] Figure 5 for Figure 4 A schematic diagram of the partial structure of a home elevator is shown. DETAILED DESCRIPTION

[0020] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings.

[0021] Figure 1 The circuit structure diagram of a home elevator provided in the embodiment of the present application is shown in FIG. Figure 1 As shown, the home elevator includes: a PLC, an up switch S4, a down switch S5, a first relay KA1, a second relay KA2, a frequency converter 110, a motor 120, a proximity switch SQ, a time relay KT, and an encoder 130.

[0022] The up switch S4, the down switch S5, the first relay KA1, the second relay KA2, and the time relay KT are connected to the PLC respectively, the first relay KA1, the second relay KA2, and the proximity switch SQ are connected to the frequency converter 110 respectively, and the proximity switch SQ is connected in series with the time relay KT. The frequency converter 110 is connected to the motor 120 through its three-phase output terminal, the input terminal of the encoder 130 is connected to the PLC, and the output terminal of the encoder 130 is connected to the frequency converter.

[0023] The three-phase output terminals of the inverter 110 are interfaces U, V, and W. In the embodiment of the present application, the model of the inverter 410 is AS320. It can be understood that the model of the inverter can be any model of the inverter applicable to the embodiment of the present application.

[0024] The up switch S4 changes its state based on the elevator up button being triggered, so that the PLC controls the frequency converter 110 through the first relay KA1 to realize the rotation of the motor 120 in the first direction, thereby starting the ascending process of the home elevator. For example, based on the elevator up button being triggered, the up switch S4 changes from the off state to the on state. At this time, the PLC controls the frequency converter 110 through the first relay KA1 to control the motor 2 to rotate in the first direction according to the on state of the up switch S4, so that the car can ascend. Through the above scheme, the elevator car can move upward and accurately reach the target floor.

[0025] Similarly, the down switch S5 is triggered based on the elevator down button, so that the down switch state changes, so that the PLC controls the inverter 110 through the second relay KA2 to realize the motor 120 to rotate in the second direction, thereby starting the down process of the home elevator. Through the above scheme, the car can move downward and accurately reach the target floor, thereby improving the accuracy of the elevator.

[0026] During the operation of the elevator, when the PLC detects that the moving distance of the elevator car is equal to the corresponding threshold, the PLC controls the proximity switch SQ to be disconnected. When the PLC detects that the moving time of the elevator car is equal to the corresponding threshold, the PLC controls the time relay KT to be disconnected. Furthermore, the proximity switch SQ is connected in series with the time relay KT. When the proximity switch SQ and / or the time relay KT are disconnected, the frequency converter 110 controls the motor to stop rotating. Based on the above principle, when any one of the moving distance of the elevator and the moving time of the elevator reaches the preset value, the time relay KT or the proximity switch SQ is triggered to be disconnected, so that the three-phase output terminal is disconnected from the motor, and the frequency converter no longer outputs power to the motor, thereby realizing multiple protections for the elevator according to the travel and running time of the elevator. In addition, during the operation of the elevator, by calculating the moving distance and moving time of the elevator car, the accuracy of the elevator car reaching the target floor can be further improved.

[0027] Figure 2 A schematic diagram of a partial circuit structure of a home elevator provided in an embodiment of the present application. In one embodiment of the present application, the first relay KA1 and the second relay KA2 form an interlocking circuit, such as Figure 2 As shown, the situation of rising and falling is avoided, thereby further enhancing the reliability of elevator operation.

[0028] In one implementation of the present application, the frequency converter 110 may be connected to the encoder 130 via a PG card (not shown in the figure) and a wire.

[0029] In one embodiment of the present application, a speed change detection module is provided on the home elevator, and the speed change detection module includes a speed change detection member 5 and a shift actuator 6. Figure 3 shown. Figure 3 A schematic diagram of the structure of a home elevator provided in an embodiment of the present application is shown in FIG. Figure 3 As shown, the speed change detection component 5 is arranged on the side wall of the home elevator car and close to the top of the car, each speed change actuator 6 is arranged on the guide rail of the home elevator corresponding to the corresponding level, the distance between each speed change brake component 6 and the corresponding level is the same, and each level corresponds to a speed change actuator 6.

[0030] During the movement of the elevator car, when the speed change detection member 5 reaches the position of the transposition actuator 6, the transposition actuator 6 triggers the transposition detection member 5. Based on the trigger, the transposition detection switch 5 sends a corresponding signal to the PLC. Based on the signal from the speed change detection member, the PLC changes the state of the encoder 130, so that the state of the frequency converter 410 encoder 420 changes to control the speed of the motor 2, thereby starting the deceleration process of the home elevator, that is, the car starts to decelerate.

[0031] In the embodiment of the present application, the car can be decelerated before reaching the target floor to avoid a sudden stop when the car reaches the target floor, thereby improving the stability of the elevator operation.

[0032] like Figure 1 As shown, the home elevator provided in the embodiment of the present application also includes an upper limit switch S1, a lower limit switch S2, a light curtain switch S3, an emergency stop switch S6 in the box, a tilt switch S7, a power failure indication switch S8, and a display panel 140.

[0033] The upper limit switch S1 can change its own state, for example, from disconnection to conduction, based on the upper limit detection device of the home elevator being triggered. Similarly, the lower limit switch S2 can also change its own state based on the upper limit detection device being triggered.

[0034] During the elevator's ascent, the upper limit switch S1 is triggered based on the upper limit detection device, causing the upper limit switch S1 to change state, and the PLC controls the motor 120 to stop rotating through the inverter 110, thereby stopping the ascent process of the home elevator.

[0035] During the descent of the elevator, the lower limit switch S2 is triggered based on the lower limit detection device, causing the state of the lower limit switch S2 to change, and the PLC controls the motor 120 to stop rotating through the inverter 110, thereby stopping the descent process of the home elevator.

[0036] In the embodiment of the present application, the error between the elevator car and the target floor when it reaches the target floor can be further reduced, so that the bottom of the elevator car and the target floor are on the same level, thereby improving the user experience.

[0037] The light curtain switch S3 is used to control the closing of the elevator car door. A light curtain device corresponding to the light curtain switch S3 can be provided on the elevator car door, and the light curtain device can sense whether there is a foreign object at the open elevator car door. If there is a foreign object at the open elevator car door, the light curtain switch S3 can send a signal to the PLC, and the PLC controls the elevator car door to remain open through the signal and will not close. If there is no foreign object at the open elevator car door, the light curtain switch S3 can send a signal to the PLC, and the PLC controls the elevator car door to close according to the received signal.

[0038] The emergency stop switch S6 is used to control the disconnection of the elevator power supply. An emergency stop button corresponding to the emergency stop switch S6 may be provided in the elevator. In an emergency, the user can trigger the emergency stop button to send a signal to the PLC through the emergency stop switch S6, so that the controller PLC controls the elevator power supply to be disconnected.

[0039] The display panel 140 is used to display the floor where the elevator car is located, and to indicate whether the elevator car is in an ascending or descending state during operation by displaying an upward or downward arrow, so as to prompt the user.

[0040] In addition, if Figure 1 As shown, the home elevator provided in the embodiment of the present application may further include a third relay KA3, a fourth relay KA4, and a fifth relay KA5. The third relay KA3, the fourth relay KA4, and the fifth relay KA5 are connected to the PLC respectively.

[0041] The PLC can control the on and off of the elevator car lighting through the third relay KA3. Among them, the PLC can control the car lighting to turn on under conditions such as the elevator car door is open and the load exceeds a preset threshold.

[0042] The PLC can control the elevator car to stop, i.e., brake, in abnormal situations through the fourth relay KA4. The above-mentioned abnormal situation is a situation that occurs during the operation of the elevator, such as a sudden fall. For example, in abnormal situations such as the elevator not stopping at the target floor or when the elevator meets other preset conditions, the elevator car is braked so that the elevator can stop in time, thereby improving the safety of the elevator.

[0043] In one implementation of the present application, a braking resistor R1 that cooperates with the fourth relay KA4 is also connected to the frequency converter 410. The braking resistor R1 is used to cooperate with the fourth relay KA4 to perform emergency braking.

[0044] The PLC can send an alarm signal through the fifth relay KA5 and prevent the car door from closing, so as to ensure the safety of the elevator operation when the elevator car 1 exceeds the preset load.

[0045] like Figure 1 As shown, the home elevator also includes an upper anti-collision switch Q1 and a lower anti-collision switch Q2, and the upper anti-collision switch Q1 and the lower anti-collision switch Q2 are respectively connected to the PLC.

[0046] It should be noted that, in the home elevator of the present application, an upper anti-collision detection device corresponding to the upper anti-collision switch Q1 and a lower anti-collision detection device corresponding to the lower anti-collision switch Q2 are provided.

[0047] When the elevator is operating normally, since the height of the elevator car is less than the height of a single floor, the top of the elevator car usually does not touch the top of the floor. However, in the case of abnormal operation of the elevator (such as failure of the upper limit switch, etc.), the elevator does not brake in time after reaching the target floor, but continues to run upward, causing the top of the elevator car to collide with the top of the floor. In this case, the upper anti-collision detection device is triggered, and based on the triggering, the upper anti-collision detection device sends a corresponding signal to the PLC, and the PLC controls the upper anti-collision switch Q1 to change its state according to the signal, for example, the upper anti-collision limit switch Q1 changes from disconnected to on, so that the PLC controls the motor 120 to stop rotating, even if the car stops moving.

[0048] Correspondingly, in the case of abnormal operation of the elevator, after reaching the target floor, the elevator does not brake in time, but continues to run downward, so that the bottom of the elevator car collides with the bottom of the floor. In this case, the lower anti-collision detection device is triggered, and based on the triggering, the lower anti-collision detection device sends a corresponding signal to the PLC, so that the PLC controls the state of the lower anti-collision switch Q2 to change, so that the PLC controls the motor 120 to stop rotating, that is, the car stops moving.

[0049] The upper anti-collision switch Q1 and the lower anti-collision switch Q2 can effectively control the motor 120 to stop running when the elevator is about to collide with the building, thereby braking the elevator in time, further enhancing the safety of the elevator and improving the reliability of the elevator.

[0050] Figure 4 A schematic diagram of the structure of a home elevator provided in an embodiment of the present application is shown in FIG. Figure 5 for Figure 4 The partial structural diagram of a household elevator is shown in FIG. Figure 4 , 5 As shown, the home elevator includes: a car 1, a rope 4, a support member 11, a hinge shaft 51, a tilt detection member 52 and a tilt actuator 53.

[0051] The motor 2 is arranged on the outer surface of the top of the car 1, one end of the rope 4 is connected to the motor 2, and the other end of the rope 4 is above the car 1. The rope 4 is gathered or released following the rotation of the motor 2 to move the car 1.

[0052] The support member 11 is connected to the middle position of the top of the outer surface of the car 1 through the hinge shaft 51, and one end of the motor 2 is connected to the support member 11. The support member 11 is used to rotate along the hinge shaft 51 toward the side of the rope with a large deformation, and the position of the motor 2 changes with the rotation of the support member 51. The tilt detection member 52 is arranged at the motor 2 and close to the end of the motor 2 connected to the support member 11, and the position of the tilt detection member 52 changes with the position change of the motor 2. The tilt actuator 53 is arranged below the tilt detection member 52, and the tilt actuator 53 is connected to the car 1.

[0053] In this embodiment, the difference in deformation between the two ropes 4 will cause the support member 11 to rotate along the hinge shaft 51. The change in the difference in deformation between the two ropes 4 will cause the support member 11 to rotate at different angles toward the side of the rope 4 with a larger deformation. The greater the load, the greater the difference in deformation between the two ropes 4, and the greater the rotation angle of the support member 11. When the load reaches the rated maximum load of the car 1, the rotation amount of the support member 11 is the rated rotation amount. When the car 1 is overloaded, the difference in deformation between the two ropes 4 exceeds the rated amount, thereby causing the rotation amount of the support member 11 to exceed the rated rotation amount.

[0054] During the operation of the elevator, the position of the tilt detection member 52 changes with the movement of the motor 2. According to the preset relative position relationship between the tilt detection member 52 and the tilt actuator 53, when the elevator is overloaded, the tilt detection member 52 moves to the position of the tilt actuator 53. At this time, the tilt actuator 53 triggers the tilt detection member 52. Based on the triggering, the tilt detection member 52 can send a corresponding signal to the electric control module, so that the electric control module controls the motor 2 to stop rotating according to the signal.

[0055] The embodiment of the present application provides a home elevator, which cooperates with each other through an up switch, a down switch, a first relay, a second relay, a proximity switch, a time relay, a frequency converter, a PLC, and a motor. The PLC controls the frequency converter through the first relay or the second relay according to the state change of the up switch or the down switch, and adjusts the rotation direction of the motor by controlling the frequency converter, so as to realize the up or down movement of the elevator. The PLC uses the proximity switch and the time relay to realize the accurate operation and stop of the elevator. Through the above technical solution, the errors existing in the operation of the elevator are effectively reduced, the accuracy and stability of the elevator operation are improved, and the user experience is enhanced.

[0056] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0057] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of this specification.

Claims

1. A home elevator, characterized in that: The home elevator comprises: a programmable logic controller PLC, an up switch, a down switch, a first relay, a second relay, a frequency converter, a motor, a proximity switch, a time relay, an encoder, an upper limit switch, and a lower limit switch; The up switch is connected to the PLC, and the up switch changes its state based on the triggering of the up button of the home elevator; one end of the first relay is connected to the PLC, and the other end is connected to the frequency converter, and the frequency converter is connected to the motor; the PLC is used to control the frequency converter through the first relay to make the motor rotate in the first direction based on the change of the up switch state, thereby starting the ascending process of the home elevator; The down switch is connected to the PLC, and the down switch changes its state based on the triggering of the down button of the home elevator; one end of the second relay is connected to the PLC, and the other end is connected to the frequency converter; the PLC is used to control the frequency converter through the second relay based on the change of the down switch state to make the motor rotate in the second direction, thereby starting the descending process of the home elevator; One end of the time relay is connected to the PLC, and the other end is connected to the frequency converter through a proximity switch; the frequency converter is used to control the motor to stop rotating when the proximity switch and / or the time relay are disconnected; wherein the PLC is used to control the proximity switch to be disconnected when the moving distance of the home elevator is equal to a preset threshold; and the PLC is also used to control the time relay to be disconnected when the moving time of the home elevator is equal to a preset time; The home elevator also includes: a car, a rope, a support, an articulated shaft, a tilt detection member and a tilt actuator; the motor is arranged on the outer surface of the top of the car, one end of the rope is connected to the motor, and the other end of the rope is connected to the top of the car; the rope is retracted or released following the rotation of the motor to move the car; the support is connected to the middle position of the top of the outer surface of the car through the articulated shaft, and one end of the motor is connected to the support; the support is used to rotate along the side of the rope with a large deformation amount along the articulated shaft, and the position of the motor follows the rotation of the support the tilt detecting member is arranged at the motor and close to one end where the motor is connected to the supporting member, and the position of the tilt detecting member changes with the position change of the motor; the tilt actuating member is arranged below the tilt detecting member, and the tilt actuating member is connected to the car; the deformation difference between the two ropes will cause the supporting member to rotate along the hinge shaft, and the change of the deformation difference between the two ropes will cause the supporting member to rotate to the side of the rope with larger deformation at different angles. The greater the load, the greater the deformation difference between the two ropes, and the greater the rotation angle of the supporting member.

2. The home elevator according to claim 1, characterized in that: The home elevator further comprises a light curtain switch and an emergency stop switch, wherein the light curtain switch and the emergency stop switch are both connected to the PLC; When an abnormality is detected at the elevator door of the home elevator, the light curtain switch state changes, so that the PLC controls the motor to stop rotating; The emergency stop switch is used to change the state of the emergency stop switch based on the emergency stop button of the home elevator being triggered, so that the PLC controls the motor to stop rotating.

3. The home elevator according to claim 1, characterized in that: The frequency converter is connected to the encoder via a PG card.

4. The home elevator according to claim 1, characterized in that: The first relay and the second relay constitute an interlocking circuit.

5. The home elevator according to claim 1, characterized in that: The home elevator further comprises a third relay, a fourth relay and a fifth relay, wherein the third relay, the fourth relay and the fifth relay are respectively connected to the PLC; The PLC controls the lighting source of the elevator through the third relay; as well as The PLC controls the elevator to stop in an abnormal situation through the fourth relay; The PLC controls the elevator through the fifth relay to send an alarm signal in an abnormal situation.

6. The home elevator according to claim 5, characterized in that: The home elevator further comprises a braking resistor, and the braking resistor is connected to the frequency converter; The braking resistor is used to cooperate with the fourth relay to enable the PLC to control the home elevator to stop under abnormal circumstances.

7. The home elevator according to claim 1, characterized in that: The input end of the encoder is connected to the PLC, and the output end of the encoder is connected to the frequency converter; the PLC enables the encoder to obtain a corresponding encoding result based on a signal from the speed change detection module of the home elevator, so that the frequency converter controls the speed of the motor according to the encoding result of the encoder, thereby starting the deceleration process of the home elevator; wherein the speed change detection module includes a speed change detection member and a plurality of speed change actuators, the speed change detection member is arranged on the side wall of the car of the home elevator and close to the top of the car, each speed change actuator is arranged on the guide rail of the home elevator, and the distance between each speed change actuator and the corresponding leveling layer is the same, and each leveling layer corresponds to a speed change actuator; the shift actuator is used to trigger the speed change detection member when the speed change detection member reaches the position of the speed change actuator; the speed change detection member is used to send a corresponding signal to the PLC based on the trigger; The upper limit switch and the lower limit switch are both connected to the PLC; the upper limit switch is used to change the state of the upper limit switch based on the upper limit detection device being triggered, so that the PLC controls the motor to stop rotating, thereby stopping the ascending process of the home elevator; the lower limit switch is used to change the state of the lower limit switch based on the lower limit detection device being triggered, so that the PLC controls the motor to stop rotating, thereby stopping the descending process of the home elevator; The home elevator also includes an upper anti-collision switch and a lower anti-collision switch, the upper anti-collision switch and the lower anti-collision switch are respectively connected to the PLC, and the home elevator is provided with an upper anti-collision detection device corresponding to the upper anti-collision switch and a lower anti-collision detection device corresponding to the lower anti-collision switch; when the elevator does not brake in time after reaching the target floor, but continues to run upward, so that the top of the elevator car collides with the top of the floor, the upper anti-collision detection device is triggered, and the upper anti-collision detection device sends a corresponding signal to the PLC based on the triggering, and the PLC controls the upper anti-collision switch state to change according to the signal, so that the PLC controls the motor to stop rotating; when the elevator does not brake in time after reaching the target floor, but continues to run downward, so that the bottom of the elevator car collides with the bottom of the floor, the lower anti-collision detection device is triggered, and the lower anti-collision detection device sends a corresponding signal to the PLC based on the triggering, so that the PLC controls the lower anti-collision switch state to change, so that the PLC controls the motor to stop rotating.

Images