A home elevator

Abstract

The present application discloses a household elevator, which is used to solve the problem that the existing elevators cannot accurately reach the target floor. The elevator includes a controller and a switch assembly. The upper limit switch of the switch assembly is electrically connected to the upper limit device. The upper limit device, based on the triggering of the upper brake device, causes the controller to control the elevator motor to stop rotating, thereby stopping the elevator's ascending process; the lower limit switch is connected to the lower limit device. The lower limit device, based on the triggering of the lower brake device, causes the controller to control the elevator motor to stop rotating, thereby stopping the elevator's descending process; the upper anti-collision limit switch is connected to the upper anti-collision limit device. Based on the triggering of the upper anti-collision limit device, the controller controls the elevator to stop in the event of abnormal operation of the elevator; the lower anti-collision limit switch is connected to the lower anti-collision limit device. Based on the triggering of the lower anti-collision limit device, the controller controls the elevator to stop in the event of abnormal operation of the elevator.

Description

Technical Field

[0001] The present application 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 emerged. Home elevators bring great convenience to users' lives, allowing users to reach the designated floor safely and quickly.

[0004] Since the car of a home elevator is small and the travel is short, the existing home elevators usually use a motor controller in conjunction with a mechanical structure to achieve the lifting of the elevator. However, the operation mode of the existing elevator will have a large error in controlling the travel of the elevator, which cannot enable users to reach the target floor quickly and accurately, and there are also great safety hazards. Summary of the invention

[0005] The embodiment of the present application provides a home elevator to solve the problem that the existing elevators cannot accurately reach the target floor.

[0006] An embodiment of the present application provides a home elevator, comprising:

[0007] Controller;

[0008] A switch assembly, the switch assembly is connected to the controller, and the switch assembly at least includes an upper limit switch, a lower limit switch, an upper anti-collision limit switch, and a lower anti-collision limit switch;

[0009] The upper limit switch is electrically connected to the upper limit device, and the upper limit device changes the state of the upper limit switch based on the triggering of the upper brake device, so that the controller controls the elevator motor to stop rotating, thereby stopping the ascending process of the elevator; the lower limit switch is connected to the lower limit device, and the lower limit device changes the state of the lower limit switch based on the triggering of the lower brake device, so that the controller controls the elevator motor to stop rotating, thereby stopping the descending process of the elevator; wherein the upper limit device and the lower limit device are arranged on the left and right sides of the outer surface of the elevator car, and the upper brake device and the lower brake device are arranged on the left and right sides of the elevator slide rails, the slide rails are arranged outside the car along the height direction of the elevator car, and the slide rails are connected to the car, so that the car moves along the slide rails;

[0010] The upper anti-collision limit switch is connected to the upper anti-collision limit device, and based on the triggering of the upper anti-collision limit device, the state of the upper anti-collision limit switch changes, so that the controller controls the elevator to stop when the elevator operates abnormally; the lower anti-collision limit switch is connected to the lower anti-collision limit device, and based on the triggering of the lower anti-collision limit device, the state of the upper anti-collision limit switch changes, so that the controller controls the elevator to stop when the elevator operates abnormally; wherein the upper anti-collision limit device is arranged at the top of the outer surface of the elevator car, and the lower anti-collision limit device is arranged at the bottom of the outer surface of the elevator car.

[0011] The embodiment of the present application provides a home elevator, and the controller can accurately and timely control the elevator to stop during the ascending and descending processes by triggering the upper limit switch and the lower limit switch through the corresponding upper limit device, the upper brake device and the lower limit device, and the lower brake device according to the received signal, so that the elevator can respond in a very short time and accurately stay at the target floor. In addition, through the upper anti-collision limit switch, the lower anti-collision limit switch and the corresponding upper anti-collision limit device and the lower anti-collision limit device, it can further ensure that the elevator can stop in time, thereby enhancing the safety of the elevator. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0013] In the attached picture:

[0014] Figure 1 A schematic diagram of a control circuit for a home elevator provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the operation of a home elevator provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of the structure of a home elevator provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of the structure of a looseness detection unit for a home elevator provided in an embodiment of the present application;

[0018] Figure 5 A schematic diagram of another looseness detection unit structure of a home elevator provided in an embodiment of the present application;

[0019] Figure 6 A schematic diagram of the structure of an overload detection unit for a home elevator provided in an embodiment of the present application;

[0020] Figure 7 A schematic diagram of the structure of another overload detection unit for a home elevator provided in an embodiment of the present application.

[0021] Description of symbols

[0022] S1 upper limit switch

[0023] S2 Lower limit switch

[0024] S3 Light Curtain Switch

[0025] S4 Up switch

[0026] S5 down switch

[0027] S6 Emergency Stop Switch

[0028] S7 overload switch

[0029] Q1 upper anti-collision limit switch

[0030] Q2 Lower anti-collision limit switch

[0031] KA1 First relay

[0032] KA2 Second relay

[0033] KA3 Third relay

[0034] KA4 Fourth relay

[0035] 1 Car

[0036] 11 Upper limit device

[0037] 12 Upper brake device

[0038] 13 Lower limit device

[0039] 14 Lower brake

[0040] 15 Upper anti-collision limit device

[0041] 16 Lower anti-collision limit device

[0042] 17. Detection Device

[0043] 181 First Sensing Device

[0044] 182 Second Sensing Device

[0045] 2 Slide rails

[0046] 3 Motor

[0047] 4 reels

[0048] 5 Rope

[0049] 61 Elastic parts

[0050] 62 Actuator

[0051] 63 Loose position switch

[0052] 64 Fatigue position switch

[0053] 71 Fixed pulley

[0054] 72 Support

[0055] 73 Articulated shaft

[0056] 74 Overload device DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in combination with the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0058] Figure 1 A schematic diagram of a control circuit for a home elevator provided in an embodiment of the present application.

[0059] like Figure 1 As shown, the control circuit includes a controller PLC, a switch component and a relay component.

[0060] The switch assembly is connected to the controller PLC, and at least includes an ascending switch S4, a descending switch S5, an upper limit switch S1, a lower limit switch S2, an upper anti-collision limit switch Q1, and a lower anti-collision limit switch Q2. Among them, the ascending switch S4 is used to control the start of the ascending process of the elevator, and the descending switch S5 is used to control the start of the descending process of the elevator. The upper limit switch S1 is used to control the stop of the ascending process of the elevator, and the lower limit switch S2 is used to control the stop of the descending process of the elevator. The upper anti-collision limit switch Q1 and the lower anti-collision limit switch Q2 are used to control the stop of the elevator in the event of abnormal operation of the elevator. The relay assembly is connected to the controller PLC, and the relay assembly includes at least a first relay KA1 and a second relay KA2. Among them, the controller PLC controls the elevator to ascend through the first relay KA1 and controls the elevator to descend through the second relay KA2.

[0061] Specifically, the up switch S4 corresponds to the up button in the elevator, and the down switch S5 corresponds to the down button in the elevator. When the user presses the up button or the down button, the up button or the down button sends a signal to the corresponding up switch S4 or down switch S5, so that the up switch S4 or the down switch S5 sends a high level signal to the controller PLC. The controller PLC can control the forward rotation of the motor through the relay KA1, or control the reverse rotation of the motor through the relay KA2, thereby controlling the start of the elevator's up process or down process.

[0062] Figure 2 A schematic diagram of the operation of a home elevator provided in an embodiment of the present application.

[0063] like Figure 2 As shown, the elevator car 1 moves along the track of the slide rail 2. The upper limit switch S1 corresponds to the upper limit device 11 on the upper side of the elevator car 1, and the lower limit switch S2 corresponds to the lower limit device 13. In addition, in order to avoid interference between the upper limit device 11 and the lower limit device 13, the upper limit device 11 and the lower limit device 13 can be respectively arranged on the left and right sides of the elevator.

[0064] Two upper and lower slide rails 2 are respectively arranged on both sides of the outside of the car 1, so that the car 1 can go up or down on the track of the slide rails 2. An upper brake device 12 corresponding to the upper limit device 11 is arranged on the slide rail 2. During the ascent of the elevator, when the elevator reaches the target floor, the upper limit device 11 and the upper brake device 12 are exactly in the same horizontal plane. The upper brake device 12 can trigger the upper limit device 11 by contact or engagement, and the upper limit device 11 sends a signal to the corresponding upper limit switch S1, so that the upper limit switch S1 is closed, so that the controller PLC receives a high level. The controller PLC can send a signal to the first relay KA1, so that the first relay KA1 controls the elevator motor to stop, thereby controlling the stop of the elevator; wherein the first relay KA1 is connected to the frequency converter, and the frequency converter is connected to the elevator motor. Therefore, the first relay KA1 drives the motor by controlling the output frequency and voltage of the frequency converter.

[0065] Correspondingly, a lower brake device 14 corresponding to the lower limit device 13 is provided on the slide rail 2. During the descent of the elevator, when the elevator reaches the target floor, the lower limit device 13 and the lower brake device 14 are exactly at the same horizontal plane. The lower brake device 13 can trigger the lower limit device 14 by contact or engagement, and the lower limit device 13 sends a signal to the corresponding lower limit switch S2, so that the lower limit switch S2 is closed, so that the controller PLC receives a high level. The controller PLC can send a signal to the second relay KA2, so that the second relay KA2 controls the motor to stop by controlling the output frequency and voltage of the inverter, thereby controlling the stop of the elevator.

[0066] The upper anti-collision limit switch Q1 corresponds to the upper anti-collision limit device 15 on the top of the elevator car 1. In one embodiment of the present application, the upper anti-collision limit device 15 is a sensor, which can be arranged on the upper part of the outer surface of the car 1 to sense whether the elevator has an upward collision phenomenon.

[0067] When the elevator is operating normally, since the height of the elevator car 1 is less than the height of a single-story floor, the top of the elevator car 1 usually does not touch the top of the floor. That is to say, when the elevator is operating normally, the upper anti-collision limit device 15 is usually not triggered. However, in the event of an 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 1 to collide with the top of the floor. In this case, the upper anti-collision limit device 15 touches the top of the floor and is triggered, and the upper anti-collision limit device 15 sends a signal to the corresponding upper anti-collision limit switch Q1, closing the upper anti-collision limit switch Q1, so that the controller PLC receives a high-level signal. After receiving the high level, the controller PLC sends a signal to the relay to control the elevator to stop running.

[0068] 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 1 collides with the bottom of the floor. In this case, the lower anti-collision limit device 16 touches the bottom of the floor and is triggered, and the lower anti-collision limit device 16 sends a signal to the corresponding upper anti-collision limit switch Q2, so that the lower anti-collision limit switch Q2 is closed, so that the controller PLC receives a high level. After receiving the high level, the controller PLC sends a signal to the relay to control the elevator to stop running.

[0069] By setting the upper anti-collision limit device 15 and the lower anti-collision limit device 16, when the elevator collides with a floor, the controller PLC can control the motor to stop running and brake the elevator in time, thereby enhancing the safety of the elevator and improving the reliability of the elevator.

[0070] In one embodiment of the present application, the switch assembly may further include an acceleration detection switch and a deceleration detection switch ( Figure 1 Not shown). And, Figure 2 As shown, a detection device 17 connected to both the acceleration detection switch and the deceleration detection switch can be provided at the side of the elevator car 1 near the top. During the operation of the elevator, the acceleration detection switch or the deceleration detection switch can be closed through the induction of the detection device 17, so that the controller PLC obtains a high level. The controller PLC can send a signal to the relay, and by controlling the frequency of the inverter, the speed of the motor can be increased or decreased, thereby controlling the acceleration or deceleration of the elevator. Among them, the detection device 17 can be a sensor.

[0071] Specifically, the slide rail 2 may be provided with two sensing devices corresponding to the detection device 17, such as Figure 2 The first sensing device 181 and the second sensing device 182 are shown in . During one operation of the elevator, when the detection device 17 detects one sensing device, the acceleration detection switch is closed, and a signal is sent to the controller PLC, and the controller PLC controls the motor to accelerate the elevator; when the detection device 17 detects another sensing device, the deceleration detection switch is closed, and a signal is sent to the controller PLC, and the controller PLC controls the motor to decelerate the elevator. It can be seen that the acceleration or deceleration of the elevator can be controlled by the cooperation of the two sensing devices and the detection device 17. Among them, the detection device 17 can be a signal receiving device for receiving a signal sent by the sensing device, or the detection device 17 can be a triggered component triggered by the sensing device.

[0072] Taking two floors as an example, the sensing device may include a first sensing device 181 and a second sensing device 182. The first sensing device 181 is located on the first floor, and the second sensing device 182 is located on the second floor.

[0073] The distance between the first sensing device 181 and the bottom of the second floor should be less than the distance between the detection device 17 and the bottom of the second floor, that is, when the elevator stops on the first floor and does not move, the first sensing device 181 should be higher than the detection device 17. When the elevator starts to rise, the detection device 17 can detect the existence of the first sensing device 181 when the first sensing device 181 is at the same horizontal plane as itself, which indicates that the elevator starts to rise. Therefore, the detection device 17 can send a signal to the acceleration detection switch to close the acceleration detection switch, so that the controller PLC receives a high-level signal. The controller PLC can control the motor speed to increase through the relay, thereby controlling the elevator to accelerate. Therefore, in order for the detection device 17 to detect the first sensing device 181, the first sensing device 181 should be higher than the detection device 17.

[0074] The distance between the second sensing device 182 and the bottom of the second floor should be less than the distance between the detection device 17 and the bottom of the second floor, that is, when the elevator stops on the second floor, the second sensing device 182 should be lower than the detection device 17. When the elevator starts to rise and approaches the target floor, the detection device 17 can detect the existence of the second sensing device 182 when the second sensing device 182 is at the same level as itself, which means that the elevator is about to reach the target floor. Therefore, the detection device 17 can send a signal to the deceleration detection switch to close the deceleration detection switch, so that the controller PLC receives a high-level signal. The controller PLC can control the motor speed to decrease through the relay, thereby controlling the elevator to decelerate. Therefore, in order for the detection device 17 to detect the second sensing device 182, the second sensing device 182 should be lower than the detection device 17.

[0075] In summary, during the process of the elevator ascending, the elevator can be accelerated by the detection device 17 on the first sensing device 181, and the elevator can be decelerated by the detection of the second sensing device 182, thereby completing the process of starting, accelerating, decelerating and stopping the elevator during operation. The working principle of the detection device 17 during the elevator descending process is the same as that during the ascending process, and this application will not repeat it here.

[0076] Figure 3 A schematic diagram of the structure of a home elevator provided in an embodiment of the present application.

[0077] like Figure 3 As shown, the home elevator includes a car 1, an elastic member 61 and a looseness detection unit ( Figure 3 The elevator car 1 is connected to the motor 3, the rotating shaft of the motor 3 is connected to the drum 4, a rope 5 is provided on the surface of the drum 4, the bottom end of the rope 5 is connected to the drum 4, the top end of the rope 5 is fixed above the car 1, the motor 3 drives the drum 4 to rotate to release the rope 5 on the surface of the drum 4, so that the car 1 moves downward; the elastic member 61 is connected to the rope 5 to carry the car 1, and the gravity of the car 1 acts on the elastic member 61 through the rope 5, so that the elastic member 61 is elastically deformed.

[0078] During the normal descent of the car 1, regardless of the load of the car 1, the force acting on the elastic member 61 is relatively stable, that is, during the descent of the car 1, the force acting on the elastic member 61 by the rope 5 does not change much, which makes the elastic deformation of the elastic member 61 have a rated deformation amount, and the elastic member 61 within the rated deformation range is in a normal state; but when the deformation of the elastic member 61 is lower than the rated deformation amount, that is, the tension of the rope 5 on the elastic member 61 suddenly decreases, and the rope 5 loses the normal load force on the elastic member 61, at this time, the change of the elastic member 61 lower than the rated deformation amount is detected by the loose detection unit, which means that the rope 5 is loose, and the loose detection unit can detect the loose state of the rope 5 in time. During the actual operation of the elevator, a common problem is that the car 1 encounters obstacles when descending, for example, the car 1 is offset and rubs against the side rails 2 and other parts, resulting in the car 1 The downward speed is less than the speed at which the motor 3 releases the rope 5, causing the rope 5 to be loose, and the solution in this embodiment can detect the loose state of the rope 5 in time.

[0079] Further, Figure 4 This is a schematic diagram of the structure of the looseness detection unit of the home elevator provided in the embodiment of the present application. Figure 4As shown, the loose detection unit includes a loose position switch 63, which is arranged in the deformation direction of the elastic member 61 below the rated deformation. The specific arrangement of the loose position switch 63 can detect the situation that the deformation of the elastic member 61 is lower than the rated deformation, that is, the elastic member 61 changes from a normal squeezed state within the rated deformation range to an abnormal state where the deformation is lower than the rated deformation. The structural change of the elastic member 61 will trigger the loose position switch 63.

[0080] like Figure 4 As shown, the home elevator further includes an actuator 62. The actuator 62 is connected to the elastic member 61, and the position of the actuator 62 changes with the deformation of the elastic member 61, and the position of the actuator 62 includes a first position interval that turns on the loose position switch 63 and a second position interval that turns off the loose position switch 63. In order to ensure that when the deformation of the elastic member 61 is lower than the rated deformation, the loose position switch 63 can be triggered relatively accurately, an actuator 62 is added in the present embodiment. The actuator 62 and the elastic member 61 are connected so that the actuator 62 can obtain the ability to express the deformation of the elastic member 61, and the movable range of the actuator 62 is set to a first position interval and a second position interval following the change of the elastic member 61. The actuator 62 in the first position interval indicates that the deformation of the elastic member 61 is lower than the rated deformation, and the actuator 62 can trigger the loose position switch 63; on the contrary, the actuator 62 in the second position interval indicates that the deformation of the elastic member 61 is within the rated deformation range, and the actuator 62 cannot trigger the loose position switch 63, so that the loose position switch 63 is in a disconnected state.

[0081] It is understandable that the loose position switch 63 can be a limit switch that contacts the actuator 62, or a photoelectric proximity switch that does not contact the actuator 62. The specific model and installation method are selected according to the functions of existing products and can be used flexibly.

[0082] Accordingly, Figure 5 This is a schematic diagram of another looseness detection unit structure of a home elevator provided in an embodiment of the present application. Figure 4-5 As shown, the home elevator may further include a fatigue position switch 64, which is arranged in the deformation direction of the elastic member 61 that is higher than the rated deformation. In this embodiment, the fatigue position switch 64 and the loose position switch 63 are both arranged along the deformation direction of the elastic member 61, the difference being that the setting position of the fatigue position switch 64 is just opposite to the loose position switch 63, and is arranged at a position where the deformation of the elastic member 61 exceeds the rated deformation. When the deformation of the elastic member 61 exceeds the rated deformation, the fatigue position switch 64 may be triggered. It is understandable that the fatigue position switch 64 may also be a limit switch or a photoelectric proximity switch, and the actuator 62 on the elastic member 61 may trigger the fatigue position switch 64.

[0083] also, Figure 6 This is a schematic diagram of the structure of the overload detection unit of the home elevator provided in the embodiment of the present application. Figure 3 , Figure 6 As shown, two ropes 5 are provided on the surface of the drum 4 of the home elevator, and the bottom ends of the two ropes 5 are connected to the drum 4 respectively, and the top ends of the two ropes 5 are respectively passed around the drum 4 and two fixed pulleys 71 and then fixed to the upper position of the car 1. The two fixed pulleys 71 are arranged at the two sides of the top of the car 1, and the vertical section between the top end of the rope 5 and the fixed pulley 71 is arranged along the movement track of the car 1 to carry the car 1. The motor 3 drives the drum 4 to rotate to tighten or release the rope 5 on the surface of the drum 4, so that the car 1 goes up or down. The drum 4 is offset between the two ropes 5, so that the deformation of the two ropes 5 under load is different, and the difference in the deformation of the two ropes 5 has a rated value. Figure 6 The overload detection unit shown is suitable for detecting a change in which the difference in deformation of the two ropes 5 is greater than a rated amount.

[0084] In this embodiment, the drum 4 is offset and set between the two fixed pulleys 71, so that the distances between the two ropes 5 and the drum 4 are different. The two ropes 5 are set asymmetrically with the drum 4 of the motor 3, so that the deformation of the two ropes 5 under load is different. The difference between the deformation of the two ropes 5 has a rated value, and this rated value corresponds to the maximum rated load of the car 1. For example, the rated maximum load of the car 1 is designed to be 800KG. When the load in the car 1 is equal to 800KG, the difference between the deformation of the two ropes 5 is the rated value; when the load in the car 1 exceeds 800KG, the difference between the deformation of the two ropes 5 exceeds the rated value. By detecting whether the difference between the deformation of the two ropes 5 exceeds the rated value, it is judged whether the car 1 is overloaded. The structure of the application is very clever and reasonable. It does not need to set up a complex electrical detection system, and it can detect the elevator in an overloaded state in a timely and accurate manner.

[0085] Specifically, Figure 7 This is another schematic diagram of the structure of an overload detection unit for a home elevator provided in an embodiment of the present application. Figure 6-7As shown, two fixed pulleys 71 are connected to the support member 72, and the vertical sections of the two ropes 5 are symmetrically arranged along the support member 72. The support member 72 between the two fixed pulleys 71 is provided with a hinge shaft 73. The support member 72 rotates along the hinge shaft 73 toward the side of the rope 5 with a large deformation, so that the rotation of the support member 72 has a rated rotation amount. In this embodiment, the two fixed pulleys 71 are set on the support member 72, and the support member 72 is hingedly set. The difference in the deformation of the two ropes 5 will cause the support member 72 to rotate along the hinge shaft 73. The change in the difference in the deformation of the two ropes 5 will cause the support member 72 to rotate at different angles toward the side of the rope 5 with a large deformation. The greater the load, the greater the difference in the deformation of the two ropes 5, and the greater the rotation angle of the support member 72. When the load reaches the rated maximum load of the car 1, the rotation amount of the support member 72 is the rated rotation amount. When the car 1 is overloaded, the difference in the deformation of the two ropes 5 exceeds the rated amount, and then the rotation amount of the support member 72 exceeds the rated rotation amount.

[0086] The overload detection unit further includes an overload device 74, which is arranged in a rotation direction greater than the rated rotation amount of the support member 72. In order to detect whether the difference in the deformation amount of the two ropes 5 exceeds the rated amount, it can be achieved by detecting whether the rotation amount of the support member 72 exceeds the rated rotation amount. Therefore, in this embodiment, the overload device 74 is arranged in a rotation direction greater than the rated rotation amount of the support member 72. When the rotation amount of the support member 72 exceeds the rated rotation amount, the overload device 74 will be triggered.

[0087] like Figure 1 As shown, the switch assembly also includes an overload switch S7. The overload switch S7 is connected to an overload device. When the load in the elevator car 1 exceeds a preset threshold, the overload device is triggered and sends a signal to the overload switch S7. The overload switch S7 is closed, so that the controller PLC receives a high level. The relay group also includes a fifth relay ( Figure 1 (not shown), after the controller PLC receives the high level, it can send an alarm signal through the fifth relay and prevent the elevator door from closing, so that the user can adjust the load of the elevator car 1 to ensure the safety of the elevator operation.

[0088] In addition, the switch assembly also includes a light curtain switch S3. A light curtain device corresponding to the light curtain switch S3 may be provided on the elevator car 1 door, and the light curtain device may sense whether there is a foreign object at the open elevator car 1 door. If the light curtain device senses that there is a foreign object at the open elevator car 1 door, it may send a signal to the light curtain switch S3 to close the light curtain switch S3, and the controller PLC receives a high-level signal. The controller PLC may keep the elevator car 1 door open and will not close it. If the light curtain switch detects that there is no foreign object at the open elevator car 1 door, it may send a signal to the light curtain switch S3 to open the light curtain switch S3, and the controller PLC receives a low-level signal. The controller PLC may control the elevator car 1 door to close through a relay.

[0089] In addition, the switch assembly also includes an emergency stop switch S6, which 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 state, the user can trigger the emergency stop button, and the emergency stop button sends a signal to the emergency stop switch S6 to close the emergency stop switch S6. The controller PLC receives a high-level signal from the emergency stop switch, so that the controller PLC controls the disconnection of the power supply.

[0090] Specifically, the relay assembly further includes a third relay KA3. The controller PLC can control the on and off of the lighting of the elevator car 1 through the third relay KA3. The controller PLC can control the lighting of the elevator car 1 to turn on when the door of the elevator car 1 is open or the load exceeds a preset threshold.

[0091] Specifically, the relay group may further include a fourth relay KA4. The controller PLC may brake the elevator car 1 through the fourth relay KA4, wherein the controller PLC may brake the elevator car 1 according to signals from the upper anti-collision limit switch Q1 and the lower anti-collision limit switch Q2, or when the elevator meets other preset conditions, so that the elevator can stop in time in an abnormal situation, thereby improving the safety of the elevator.

[0092] Specifically, the home elevator provided in the embodiment of the present application also includes a car display panel, which is used to display the floor where the elevator car 1 is located and the current rising or falling direction of the elevator car 1 to prompt the user.

[0093] In one embodiment of the present application, the upper anti-collision limit switch Q1 may be composed of a plurality of electrical switches connected in parallel, each upper anti-collision limit switch Q1 is respectively connected to an upper anti-collision limit device 15, and each upper anti-collision limit device 15 is evenly distributed on the top of the elevator. Along the rectangular outline of the elevator car 1, the four upper anti-collision limit devices may be respectively distributed on the four sides of the rectangle.

[0094] In contrast, the lower anti-collision limit switch Q2 may also be composed of a plurality of electrical switches connected in parallel, each of which corresponds to a lower anti-collision limit device 16, and each lower anti-collision limit device 16 is evenly distributed at the bottom of the elevator. Along the rectangular outline of the elevator car 1, the four lower anti-collision limit devices may be respectively distributed on the four sides of the rectangle.

[0095] By setting up multiple upper anti-collision limit devices and lower anti-collision limit devices, it is possible to avoid the failure of a single upper anti-collision limit device or a lower anti-collision limit device, which would cause the upper anti-collision limit switch Q1 or the lower anti-collision limit switch Q2 to be unable to conduct, and the controller PLC would be unable to receive the signal and thus perform emergency braking on the elevator car 1, thereby enhancing the safety of the elevator.

[0096] It should be noted that in the embodiments of the present application, Figure 1 The switches in the switch assembly shown in the figure are only schematically illustrated. In an actual control circuit, the switches in the switch assembly may be components such as MOS tubes that can play the role described above.

[0097] Corresponding to the relevant structure and function of the above-mentioned elevator control circuit, the specific use process of the elevator is as follows.

[0098] For example, when a user takes an elevator to go upstairs, the user presses the up button outside the elevator, and the door of elevator car 1 opens. After entering elevator car 1, the user selects a higher floor or presses the up button, and the up button sends a signal to the corresponding up switch S4, turning on the up switch S4. After the controller PLC receives the high-level signal from the up switch S4, it controls the motor to rotate forward through the corresponding first relay KA1, starting the elevator's ascent process.

[0099] Before the elevator starts to rise, the light curtain device detects whether there is a foreign object at the elevator car door. If there is a foreign object, the light curtain device sends a signal to the corresponding light curtain switch S3, and the light curtain switch S3 sends a signal to the controller PLC. The controller PLC can control the elevator car door to remain open. If there is no foreign object, the light curtain device can send a signal to the corresponding light curtain switch S3, so that the light curtain switch S3 sends a signal to the controller PLC. The controller PLC can control the elevator car door to close.

[0100] During the first half of the elevator's ascent, the detection device 17 can send a signal to the acceleration detection switch when it detects that the first sensing device 181 is on the same horizontal plane as the first sensing device 181. The acceleration detection switch is closed and sends a signal to the controller PLC, so that the controller PLC controls the motor speed to increase through the relay, thereby realizing the acceleration of the elevator. The acceleration of the elevator can be determined according to a preset value.

[0101] In the second half of the elevator ascent, the detection device 17 can send a signal to the deceleration detection switch when it detects that the second sensing device 182 is at the same horizontal plane as the second sensing device 182. The deceleration detection switch is closed and sends a signal to the controller PLC, so that the controller PLC controls the motor speed to decrease through the relay, thereby achieving the deceleration of the elevator. The acceleration of the elevator can be determined according to a preset value.

[0102] The elevator slowly approaches the target floor by decelerating. When it reaches the target floor, the upper brake device 12 arranged on the slide rail 2 triggers the corresponding upper limit device 11. The upper limit device 11 sends a signal to the corresponding upper limit switch S1, and the upper limit switch S1 can send a signal to the controller PLC. The controller PLC controls the elevator to stop through the relay.

[0103] In the embodiment of the present application, the upper limit switch, the lower limit switch and the corresponding mechanical device can brake the elevator in time, so that the elevator can accurately reach the target floor. The detection switch and the corresponding mechanical device can reasonably accelerate and decelerate the elevator during operation, so that the elevator can run smoothly with appropriate acceleration. The upper anti-collision limit switch, the lower anti-collision limit switch and the corresponding mechanical device can prevent the elevator from hard collision with the floor, thereby improving the safety of the elevator.

[0104] Based on the controller and control program, different control instructions are transmitted to the elevator's operating motor through the controller to drive the elevator up or down. In conjunction with the limit switches set on the elevator travel, users can be safely, accurately and efficiently transported to the designated floor.

[0105] To sum up, the elevator control circuit in the embodiment of the present application can be suitable for the application scenarios of home elevators. It has a short stroke and a small car, which greatly improves safety and has a fast response speed, ensuring the safe and standardized use of home elevators, and can accurately and quickly drive users to the designated floor.

[0106] The above is only an embodiment of the present application and is 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 scope of the claims of the present application.

Claims

1. A home elevator, characterized in that: include: Controller; A switch assembly, the switch assembly is connected to the controller, and the switch assembly at least includes an upper limit switch, a lower limit switch, an upper anti-collision limit switch, and a lower anti-collision limit switch; The upper limit switch is electrically connected to the upper limit device, and the upper limit device changes the state of the upper limit switch based on the triggering of the upper brake device, so that the controller controls the elevator motor to stop rotating, thereby stopping the ascending process of the elevator; The lower limit switch is connected to the lower limit device, and the lower limit device changes the state of the lower limit switch based on the triggering of the lower brake device, so that the controller controls the elevator motor to stop rotating, thereby stopping the descending process of the elevator; wherein the upper limit device and the lower limit device are arranged on the left and right sides of the outer surface of the elevator car, and the upper brake device and the lower brake device are arranged on the left and right sides of the elevator slide rails, the slide rails are arranged outside the car along the height direction of the elevator car, and the slide rails are connected to the car, so that the car moves along the slide rails; The upper anti-collision limit switch is connected to the upper anti-collision limit device, and based on the triggering of the upper anti-collision limit device, the state of the upper anti-collision limit switch changes, so that the controller controls the elevator to stop when the elevator runs abnormally; the lower anti-collision limit switch is connected to the lower anti-collision limit device, and based on the triggering of the lower anti-collision limit device, the state of the lower anti-collision limit switch changes, so that the controller controls the elevator to stop when the elevator runs abnormally; wherein the upper anti-collision limit device is arranged at the top of the outer surface of the elevator car, and the lower anti-collision limit device is arranged at the bottom of the outer surface of the elevator car; the upper anti-collision limit switch is composed of 4 parallel switches, and the upper anti-collision limit switches are respectively distributed on the four sides of the rectangle along the rectangular outline of the elevator car; the lower anti-collision limit switch is composed of 4 parallel switches, and the lower anti-collision limit switches are respectively distributed on the four sides of the rectangle along the rectangular outline of the elevator car; The switch assembly also includes an acceleration detection switch and a deceleration detection switch; The acceleration detection switch and the deceleration detection switch are both connected to a detection device, and the detection device controls the acceleration of the elevator by changing the state of the acceleration detection switch based on the induction of the corresponding induction device, and controls the deceleration of the elevator by changing the state of the deceleration detection switch; Specifically, the slide rail is provided with a sensing device corresponding to the detection device, including at least: a first sensing device and a second sensing device; If the detection device detects the first sensing device, it sends a signal to the acceleration detection switch to close the acceleration detection switch, so as to control the acceleration of the elevator by detecting the first sensing device; wherein the first sensing device is higher than the detection device; If the detection device detects the second sensing device, it sends a signal to the deceleration detection switch to close the deceleration detection switch, so as to control the elevator to decelerate by detecting the second sensing device; wherein the second sensing device is lower than the detection device; The elevator comprises a car, the car is connected to a motor via a drum, two ropes are arranged on the surface of the drum, the bottom ends of the two ropes are respectively connected to the drum, the top ends of the two ropes are respectively passed around the drum and two fixed pulleys and then fixed to the upper position of the car, the two fixed pulleys are arranged at both sides of the top of the car, the vertical section between the top end of the rope and the fixed pulley is arranged along the movement track of the car to carry the car, the motor drives the drum to rotate to tighten or release the rope on the surface of the drum, so that the car goes up or down; The drum is offsetly arranged between the two ropes, so that the deformation amounts of the two ropes under load are different, and the difference in deformation amounts of the two ropes has a rated amount; An overload detection unit is provided, wherein the overload detection unit is adapted to detect a change in which a difference in deformation between two ropes is greater than the rated amount.

2. The elevator according to claim 1, characterized in that The switch assembly includes an ascending switch and a descending switch; The ascending switch changes its state based on the triggering of the ascending button, so that the controller controls the elevator motor to rotate in the first direction, thereby starting the ascending process of the elevator; The descending switch changes its state based on the descending button being triggered, so that the controller controls the elevator motor to rotate in the second direction, thereby starting the descending process of the elevator.

3. The elevator according to claim 1, characterized in that: The switch assembly also includes a light curtain switch and an emergency stop switch; The light curtain switch is connected to the light curtain device, and the light curtain device controls the closing of the elevator car door by controlling the conduction of the light curtain switch; The emergency stop switch is connected to an emergency stop button, and controls the disconnection of the elevator power supply based on the triggering of the emergency stop button.

4. The elevator according to claim 2, characterized in that: The elevator further comprises a relay assembly; The relay assembly is connected to the controller, and the relay assembly at least includes a first relay, a second relay, a third relay and a fourth relay. The controller controls the elevator to ascend through the first relay according to the conduction of the ascending switch; the controller controls the elevator to descend through the second relay according to the conduction of the descending switch; the controller controls the lighting source of the elevator through the third relay, and controls the elevator to stop in an abnormal situation through the fourth relay.

5. The elevator according to claim 4, characterized in that: The two fixed pulleys are connected to the support, and the vertical sections of the two ropes are symmetrically arranged along the support. The support between the two fixed pulleys is provided with a hinge axis, and the support rotates along the hinge axis toward the side of the rope with a larger deformation, so that the rotation of the support has a rated rotation amount; The overload detection unit includes an overload device, which is arranged in a rotation direction greater than the rated rotation amount of the support member; The switch assembly includes an overload switch, which is used to detect the balance and overload conditions of the elevator through the connected overload device; The relay assembly includes a fifth relay; when the elevator is overloaded, the controller prompts an alarm message through the fifth relay.

6. The elevator according to claim 1, characterized in that: The elevator further comprises: an elastic member connected to the rope to carry the car, the elastic member having a rated deformation; A looseness detection unit is used to detect a change of the elastic member below the rated deformation.

7. The elevator according to claim 6, characterized in that The looseness detection unit comprises a loose position switch, and the loose position switch is arranged in a deformation direction of the elastic member that is lower than the rated deformation amount; The elevator also includes an actuator; the actuator is connected to the elastic member, the position of the actuator changes with the deformation of the elastic member, and the position of the actuator includes a first position interval that turns on the loose position switch and a second position interval that turns off the loose position switch.

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